The Tor Browser: netwerk/sctp/src/netinet/sctp_output.c@4ab42b5ab56c (annotated)

netwerk/sctp/src/netinet/sctp_output.c@4ab42b5ab56c (annotated)

netwerk/sctp/src/netinet/sctp_output.c

Wed, 31 Dec 2014 07:53:36 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:53:36 +0100
branch: TOR_BUG_3246
changeset 5: 4ab42b5ab56c
permissions: -rwxr-xr-x

Correct small whitespace inconsistency, lost while renaming variables.

 /*-
  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  * a) Redistributions of source code must retain the above copyright notice,
  *    this list of conditions and the following disclaimer.
  *
  * b) Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in
  *    the documentation and/or other materials provided with the distribution.
  *
  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  *    contributors may be used to endorse or promote products derived
  *    from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  * THE POSSIBILITY OF SUCH DAMAGE.
  */
 #ifdef __FreeBSD__
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD: head/sys/netinet/sctp_output.c 262252 2014-02-20 20:14:43Z tuexen $");
 #endif
 #include <netinet/sctp_os.h>
 #ifdef __FreeBSD__
 #include <sys/proc.h>
 #endif
 #include <netinet/sctp_var.h>
 #include <netinet/sctp_sysctl.h>
 #include <netinet/sctp_header.h>
 #include <netinet/sctp_pcb.h>
 #include <netinet/sctputil.h>
 #include <netinet/sctp_output.h>
 #include <netinet/sctp_uio.h>
 #include <netinet/sctputil.h>
 #include <netinet/sctp_auth.h>
 #include <netinet/sctp_timer.h>
 #include <netinet/sctp_asconf.h>
 #include <netinet/sctp_indata.h>
 #include <netinet/sctp_bsd_addr.h>
 #include <netinet/sctp_input.h>
 #include <netinet/sctp_crc32.h>
 #if defined(__Userspace_os_Linux)
 #define __FAVOR_BSD    /* (on Ubuntu at least) enables UDP header field names like BSD in RFC 768 */
 #endif
 #if !defined(__Userspace_os_Windows)
 #include <netinet/udp.h>
 #endif
 #if defined(__APPLE__)
 #include <netinet/in.h>
 #endif
 #if defined(__FreeBSD__)
 #if defined(__FreeBSD__) && __FreeBSD_version >= 800000
 #include <netinet/udp_var.h>
 #endif
 #include <machine/in_cksum.h>
 #endif
 #if defined(__Userspace__) && defined(INET6)
 #include <netinet6/sctp6_var.h>
 #endif
 #if defined(__APPLE__)
 #define APPLE_FILE_NO 3
 #endif
 #if defined(__APPLE__)
 #if !(defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD))
 #define SCTP_MAX_LINKHDR 16
 #endif
 #endif
 #define SCTP_MAX_GAPS_INARRAY 4
 struct sack_track {
 	uint8_t right_edge;	/* mergable on the right edge */
 	uint8_t left_edge;	/* mergable on the left edge */
 	uint8_t num_entries;
 	uint8_t spare;
 	struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
 };
 struct sack_track sack_array[256] = {
 	{0, 0, 0, 0,		/* 0x00 */
 		{{0, 0},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 1, 0,		/* 0x01 */
 		{{0, 0},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x02 */
 		{{1, 1},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 1, 0,		/* 0x03 */
 		{{0, 1},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x04 */
 		{{2, 2},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x05 */
 		{{0, 0},
 		{2, 2},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x06 */
 		{{1, 2},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 1, 0,		/* 0x07 */
 		{{0, 2},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x08 */
 		{{3, 3},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x09 */
 		{{0, 0},
 		{3, 3},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x0a */
 		{{1, 1},
 		{3, 3},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x0b */
 		{{0, 1},
 		{3, 3},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x0c */
 		{{2, 3},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x0d */
 		{{0, 0},
 		{2, 3},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x0e */
 		{{1, 3},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 1, 0,		/* 0x0f */
 		{{0, 3},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x10 */
 		{{4, 4},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x11 */
 		{{0, 0},
 		{4, 4},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x12 */
 		{{1, 1},
 		{4, 4},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x13 */
 		{{0, 1},
 		{4, 4},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x14 */
 		{{2, 2},
 		{4, 4},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x15 */
 		{{0, 0},
 		{2, 2},
 		{4, 4},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x16 */
 		{{1, 2},
 		{4, 4},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x17 */
 		{{0, 2},
 		{4, 4},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x18 */
 		{{3, 4},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x19 */
 		{{0, 0},
 		{3, 4},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x1a */
 		{{1, 1},
 		{3, 4},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x1b */
 		{{0, 1},
 		{3, 4},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x1c */
 		{{2, 4},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x1d */
 		{{0, 0},
 		{2, 4},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x1e */
 		{{1, 4},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 1, 0,		/* 0x1f */
 		{{0, 4},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x20 */
 		{{5, 5},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x21 */
 		{{0, 0},
 		{5, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x22 */
 		{{1, 1},
 		{5, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x23 */
 		{{0, 1},
 		{5, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x24 */
 		{{2, 2},
 		{5, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x25 */
 		{{0, 0},
 		{2, 2},
 		{5, 5},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x26 */
 		{{1, 2},
 		{5, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x27 */
 		{{0, 2},
 		{5, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x28 */
 		{{3, 3},
 		{5, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x29 */
 		{{0, 0},
 		{3, 3},
 		{5, 5},
 		{0, 0}
 		}
 	},
 	{0, 0, 3, 0,		/* 0x2a */
 		{{1, 1},
 		{3, 3},
 		{5, 5},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x2b */
 		{{0, 1},
 		{3, 3},
 		{5, 5},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x2c */
 		{{2, 3},
 		{5, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x2d */
 		{{0, 0},
 		{2, 3},
 		{5, 5},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x2e */
 		{{1, 3},
 		{5, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x2f */
 		{{0, 3},
 		{5, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x30 */
 		{{4, 5},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x31 */
 		{{0, 0},
 		{4, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x32 */
 		{{1, 1},
 		{4, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x33 */
 		{{0, 1},
 		{4, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x34 */
 		{{2, 2},
 		{4, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x35 */
 		{{0, 0},
 		{2, 2},
 		{4, 5},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x36 */
 		{{1, 2},
 		{4, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x37 */
 		{{0, 2},
 		{4, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x38 */
 		{{3, 5},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x39 */
 		{{0, 0},
 		{3, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x3a */
 		{{1, 1},
 		{3, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x3b */
 		{{0, 1},
 		{3, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x3c */
 		{{2, 5},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x3d */
 		{{0, 0},
 		{2, 5},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x3e */
 		{{1, 5},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 1, 0,		/* 0x3f */
 		{{0, 5},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x40 */
 		{{6, 6},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x41 */
 		{{0, 0},
 		{6, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x42 */
 		{{1, 1},
 		{6, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x43 */
 		{{0, 1},
 		{6, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x44 */
 		{{2, 2},
 		{6, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x45 */
 		{{0, 0},
 		{2, 2},
 		{6, 6},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x46 */
 		{{1, 2},
 		{6, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x47 */
 		{{0, 2},
 		{6, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x48 */
 		{{3, 3},
 		{6, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x49 */
 		{{0, 0},
 		{3, 3},
 		{6, 6},
 		{0, 0}
 		}
 	},
 	{0, 0, 3, 0,		/* 0x4a */
 		{{1, 1},
 		{3, 3},
 		{6, 6},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x4b */
 		{{0, 1},
 		{3, 3},
 		{6, 6},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x4c */
 		{{2, 3},
 		{6, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x4d */
 		{{0, 0},
 		{2, 3},
 		{6, 6},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x4e */
 		{{1, 3},
 		{6, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x4f */
 		{{0, 3},
 		{6, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x50 */
 		{{4, 4},
 		{6, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x51 */
 		{{0, 0},
 		{4, 4},
 		{6, 6},
 		{0, 0}
 		}
 	},
 	{0, 0, 3, 0,		/* 0x52 */
 		{{1, 1},
 		{4, 4},
 		{6, 6},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x53 */
 		{{0, 1},
 		{4, 4},
 		{6, 6},
 		{0, 0}
 		}
 	},
 	{0, 0, 3, 0,		/* 0x54 */
 		{{2, 2},
 		{4, 4},
 		{6, 6},
 		{0, 0}
 		}
 	},
 	{1, 0, 4, 0,		/* 0x55 */
 		{{0, 0},
 		{2, 2},
 		{4, 4},
 		{6, 6}
 		}
 	},
 	{0, 0, 3, 0,		/* 0x56 */
 		{{1, 2},
 		{4, 4},
 		{6, 6},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x57 */
 		{{0, 2},
 		{4, 4},
 		{6, 6},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x58 */
 		{{3, 4},
 		{6, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x59 */
 		{{0, 0},
 		{3, 4},
 		{6, 6},
 		{0, 0}
 		}
 	},
 	{0, 0, 3, 0,		/* 0x5a */
 		{{1, 1},
 		{3, 4},
 		{6, 6},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x5b */
 		{{0, 1},
 		{3, 4},
 		{6, 6},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x5c */
 		{{2, 4},
 		{6, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x5d */
 		{{0, 0},
 		{2, 4},
 		{6, 6},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x5e */
 		{{1, 4},
 		{6, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x5f */
 		{{0, 4},
 		{6, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x60 */
 		{{5, 6},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x61 */
 		{{0, 0},
 		{5, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x62 */
 		{{1, 1},
 		{5, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x63 */
 		{{0, 1},
 		{5, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x64 */
 		{{2, 2},
 		{5, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x65 */
 		{{0, 0},
 		{2, 2},
 		{5, 6},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x66 */
 		{{1, 2},
 		{5, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x67 */
 		{{0, 2},
 		{5, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x68 */
 		{{3, 3},
 		{5, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x69 */
 		{{0, 0},
 		{3, 3},
 		{5, 6},
 		{0, 0}
 		}
 	},
 	{0, 0, 3, 0,		/* 0x6a */
 		{{1, 1},
 		{3, 3},
 		{5, 6},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x6b */
 		{{0, 1},
 		{3, 3},
 		{5, 6},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x6c */
 		{{2, 3},
 		{5, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x6d */
 		{{0, 0},
 		{2, 3},
 		{5, 6},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x6e */
 		{{1, 3},
 		{5, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x6f */
 		{{0, 3},
 		{5, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x70 */
 		{{4, 6},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x71 */
 		{{0, 0},
 		{4, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x72 */
 		{{1, 1},
 		{4, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x73 */
 		{{0, 1},
 		{4, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x74 */
 		{{2, 2},
 		{4, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 3, 0,		/* 0x75 */
 		{{0, 0},
 		{2, 2},
 		{4, 6},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x76 */
 		{{1, 2},
 		{4, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x77 */
 		{{0, 2},
 		{4, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x78 */
 		{{3, 6},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x79 */
 		{{0, 0},
 		{3, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 2, 0,		/* 0x7a */
 		{{1, 1},
 		{3, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x7b */
 		{{0, 1},
 		{3, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x7c */
 		{{2, 6},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 2, 0,		/* 0x7d */
 		{{0, 0},
 		{2, 6},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 0, 1, 0,		/* 0x7e */
 		{{1, 6},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 0, 1, 0,		/* 0x7f */
 		{{0, 6},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 1, 0,		/* 0x80 */
 		{{7, 7},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0x81 */
 		{{0, 0},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0x82 */
 		{{1, 1},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0x83 */
 		{{0, 1},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0x84 */
 		{{2, 2},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0x85 */
 		{{0, 0},
 		{2, 2},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0x86 */
 		{{1, 2},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0x87 */
 		{{0, 2},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0x88 */
 		{{3, 3},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0x89 */
 		{{0, 0},
 		{3, 3},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 3, 0,		/* 0x8a */
 		{{1, 1},
 		{3, 3},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0x8b */
 		{{0, 1},
 		{3, 3},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0x8c */
 		{{2, 3},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0x8d */
 		{{0, 0},
 		{2, 3},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0x8e */
 		{{1, 3},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0x8f */
 		{{0, 3},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0x90 */
 		{{4, 4},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0x91 */
 		{{0, 0},
 		{4, 4},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 3, 0,		/* 0x92 */
 		{{1, 1},
 		{4, 4},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0x93 */
 		{{0, 1},
 		{4, 4},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 3, 0,		/* 0x94 */
 		{{2, 2},
 		{4, 4},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 4, 0,		/* 0x95 */
 		{{0, 0},
 		{2, 2},
 		{4, 4},
 		{7, 7}
 		}
 	},
 	{0, 1, 3, 0,		/* 0x96 */
 		{{1, 2},
 		{4, 4},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0x97 */
 		{{0, 2},
 		{4, 4},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0x98 */
 		{{3, 4},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0x99 */
 		{{0, 0},
 		{3, 4},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 3, 0,		/* 0x9a */
 		{{1, 1},
 		{3, 4},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0x9b */
 		{{0, 1},
 		{3, 4},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0x9c */
 		{{2, 4},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0x9d */
 		{{0, 0},
 		{2, 4},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0x9e */
 		{{1, 4},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0x9f */
 		{{0, 4},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xa0 */
 		{{5, 5},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xa1 */
 		{{0, 0},
 		{5, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 3, 0,		/* 0xa2 */
 		{{1, 1},
 		{5, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xa3 */
 		{{0, 1},
 		{5, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 3, 0,		/* 0xa4 */
 		{{2, 2},
 		{5, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 4, 0,		/* 0xa5 */
 		{{0, 0},
 		{2, 2},
 		{5, 5},
 		{7, 7}
 		}
 	},
 	{0, 1, 3, 0,		/* 0xa6 */
 		{{1, 2},
 		{5, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xa7 */
 		{{0, 2},
 		{5, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 3, 0,		/* 0xa8 */
 		{{3, 3},
 		{5, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 4, 0,		/* 0xa9 */
 		{{0, 0},
 		{3, 3},
 		{5, 5},
 		{7, 7}
 		}
 	},
 	{0, 1, 4, 0,		/* 0xaa */
 		{{1, 1},
 		{3, 3},
 		{5, 5},
 		{7, 7}
 		}
 	},
 	{1, 1, 4, 0,		/* 0xab */
 		{{0, 1},
 		{3, 3},
 		{5, 5},
 		{7, 7}
 		}
 	},
 	{0, 1, 3, 0,		/* 0xac */
 		{{2, 3},
 		{5, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 4, 0,		/* 0xad */
 		{{0, 0},
 		{2, 3},
 		{5, 5},
 		{7, 7}
 		}
 	},
 	{0, 1, 3, 0,		/* 0xae */
 		{{1, 3},
 		{5, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xaf */
 		{{0, 3},
 		{5, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xb0 */
 		{{4, 5},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xb1 */
 		{{0, 0},
 		{4, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 3, 0,		/* 0xb2 */
 		{{1, 1},
 		{4, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xb3 */
 		{{0, 1},
 		{4, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 3, 0,		/* 0xb4 */
 		{{2, 2},
 		{4, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 4, 0,		/* 0xb5 */
 		{{0, 0},
 		{2, 2},
 		{4, 5},
 		{7, 7}
 		}
 	},
 	{0, 1, 3, 0,		/* 0xb6 */
 		{{1, 2},
 		{4, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xb7 */
 		{{0, 2},
 		{4, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xb8 */
 		{{3, 5},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xb9 */
 		{{0, 0},
 		{3, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 3, 0,		/* 0xba */
 		{{1, 1},
 		{3, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xbb */
 		{{0, 1},
 		{3, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xbc */
 		{{2, 5},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xbd */
 		{{0, 0},
 		{2, 5},
 		{7, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xbe */
 		{{1, 5},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0xbf */
 		{{0, 5},
 		{7, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 1, 0,		/* 0xc0 */
 		{{6, 7},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0xc1 */
 		{{0, 0},
 		{6, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xc2 */
 		{{1, 1},
 		{6, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0xc3 */
 		{{0, 1},
 		{6, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xc4 */
 		{{2, 2},
 		{6, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xc5 */
 		{{0, 0},
 		{2, 2},
 		{6, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xc6 */
 		{{1, 2},
 		{6, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0xc7 */
 		{{0, 2},
 		{6, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xc8 */
 		{{3, 3},
 		{6, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xc9 */
 		{{0, 0},
 		{3, 3},
 		{6, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 3, 0,		/* 0xca */
 		{{1, 1},
 		{3, 3},
 		{6, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xcb */
 		{{0, 1},
 		{3, 3},
 		{6, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xcc */
 		{{2, 3},
 		{6, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xcd */
 		{{0, 0},
 		{2, 3},
 		{6, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xce */
 		{{1, 3},
 		{6, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0xcf */
 		{{0, 3},
 		{6, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xd0 */
 		{{4, 4},
 		{6, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xd1 */
 		{{0, 0},
 		{4, 4},
 		{6, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 3, 0,		/* 0xd2 */
 		{{1, 1},
 		{4, 4},
 		{6, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xd3 */
 		{{0, 1},
 		{4, 4},
 		{6, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 3, 0,		/* 0xd4 */
 		{{2, 2},
 		{4, 4},
 		{6, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 4, 0,		/* 0xd5 */
 		{{0, 0},
 		{2, 2},
 		{4, 4},
 		{6, 7}
 		}
 	},
 	{0, 1, 3, 0,		/* 0xd6 */
 		{{1, 2},
 		{4, 4},
 		{6, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xd7 */
 		{{0, 2},
 		{4, 4},
 		{6, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xd8 */
 		{{3, 4},
 		{6, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xd9 */
 		{{0, 0},
 		{3, 4},
 		{6, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 3, 0,		/* 0xda */
 		{{1, 1},
 		{3, 4},
 		{6, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xdb */
 		{{0, 1},
 		{3, 4},
 		{6, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xdc */
 		{{2, 4},
 		{6, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xdd */
 		{{0, 0},
 		{2, 4},
 		{6, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xde */
 		{{1, 4},
 		{6, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0xdf */
 		{{0, 4},
 		{6, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 1, 0,		/* 0xe0 */
 		{{5, 7},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0xe1 */
 		{{0, 0},
 		{5, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xe2 */
 		{{1, 1},
 		{5, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0xe3 */
 		{{0, 1},
 		{5, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xe4 */
 		{{2, 2},
 		{5, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xe5 */
 		{{0, 0},
 		{2, 2},
 		{5, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xe6 */
 		{{1, 2},
 		{5, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0xe7 */
 		{{0, 2},
 		{5, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xe8 */
 		{{3, 3},
 		{5, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xe9 */
 		{{0, 0},
 		{3, 3},
 		{5, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 3, 0,		/* 0xea */
 		{{1, 1},
 		{3, 3},
 		{5, 7},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xeb */
 		{{0, 1},
 		{3, 3},
 		{5, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xec */
 		{{2, 3},
 		{5, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xed */
 		{{0, 0},
 		{2, 3},
 		{5, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xee */
 		{{1, 3},
 		{5, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0xef */
 		{{0, 3},
 		{5, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 1, 0,		/* 0xf0 */
 		{{4, 7},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0xf1 */
 		{{0, 0},
 		{4, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xf2 */
 		{{1, 1},
 		{4, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0xf3 */
 		{{0, 1},
 		{4, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xf4 */
 		{{2, 2},
 		{4, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 3, 0,		/* 0xf5 */
 		{{0, 0},
 		{2, 2},
 		{4, 7},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xf6 */
 		{{1, 2},
 		{4, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0xf7 */
 		{{0, 2},
 		{4, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 1, 0,		/* 0xf8 */
 		{{3, 7},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0xf9 */
 		{{0, 0},
 		{3, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 2, 0,		/* 0xfa */
 		{{1, 1},
 		{3, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0xfb */
 		{{0, 1},
 		{3, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 1, 0,		/* 0xfc */
 		{{2, 7},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 2, 0,		/* 0xfd */
 		{{0, 0},
 		{2, 7},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{0, 1, 1, 0,		/* 0xfe */
 		{{1, 7},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	},
 	{1, 1, 1, 0,		/* 0xff */
 		{{0, 7},
 		{0, 0},
 		{0, 0},
 		{0, 0}
 		}
 	}
 };
 int
 sctp_is_address_in_scope(struct sctp_ifa *ifa,
                          struct sctp_scoping *scope,
                          int do_update)
 {
 	if ((scope->loopback_scope == 0) &&
 	    (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
 		/*
 		 * skip loopback if not in scope *
 		 */
 		return (0);
 	}
 	switch (ifa->address.sa.sa_family) {
 #ifdef INET
 	case AF_INET:
 		if (scope->ipv4_addr_legal) {
 			struct sockaddr_in *sin;
 			sin = (struct sockaddr_in *)&ifa->address.sin;
 			if (sin->sin_addr.s_addr == 0) {
 				/* not in scope , unspecified */
 				return (0);
 			}
 			if ((scope->ipv4_local_scope == 0) &&
 			    (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 				/* private address not in scope */
 				return (0);
 			}
 		} else {
 			return (0);
 		}
 		break;
 #endif
 #ifdef INET6
 	case AF_INET6:
 		if (scope->ipv6_addr_legal) {
 			struct sockaddr_in6 *sin6;
 #if !defined(__Panda__)
 			/* Must update the flags,  bummer, which
 			 * means any IFA locks must now be applied HERE <->
 			 */
 			if (do_update) {
 				sctp_gather_internal_ifa_flags(ifa);
 			}
 #endif
 			if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 				return (0);
 			}
 			/* ok to use deprecated addresses? */
 			sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
 			if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 				/* skip unspecifed addresses */
 				return (0);
 			}
 			if (		/* (local_scope == 0) && */
 			    (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
 				return (0);
 			}
 			if ((scope->site_scope == 0) &&
 			    (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 				return (0);
 			}
 		} else {
 			return (0);
 		}
 		break;
 #endif
 #if defined(__Userspace__)
 	case AF_CONN:
 		if (!scope->conn_addr_legal) {
 			return (0);
 		}
 		break;
 #endif
 	default:
 		return (0);
 	}
 	return (1);
 }
 static struct mbuf *
 sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t *len)
 {
 #if defined(INET) || defined(INET6)
 	struct sctp_paramhdr *parmh;
 	struct mbuf *mret;
 	uint16_t plen;
 #endif
 	switch (ifa->address.sa.sa_family) {
 #ifdef INET
 	case AF_INET:
 		plen = (uint16_t)sizeof(struct sctp_ipv4addr_param);
 		break;
 #endif
 #ifdef INET6
 	case AF_INET6:
 		plen = (uint16_t)sizeof(struct sctp_ipv6addr_param);
 		break;
 #endif
 	default:
 		return (m);
 	}
 #if defined(INET) || defined(INET6)
 	if (M_TRAILINGSPACE(m) >= plen) {
 		/* easy side we just drop it on the end */
 		parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
 		mret = m;
 	} else {
 		/* Need more space */
 		mret = m;
 		while (SCTP_BUF_NEXT(mret) != NULL) {
 			mret = SCTP_BUF_NEXT(mret);
 		}
 		SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_NOWAIT, 1, MT_DATA);
 		if (SCTP_BUF_NEXT(mret) == NULL) {
 			/* We are hosed, can't add more addresses */
 			return (m);
 		}
 		mret = SCTP_BUF_NEXT(mret);
 		parmh = mtod(mret, struct sctp_paramhdr *);
 	}
 	/* now add the parameter */
 	switch (ifa->address.sa.sa_family) {
 #ifdef INET
 	case AF_INET:
 	{
 		struct sctp_ipv4addr_param *ipv4p;
 		struct sockaddr_in *sin;
 		sin = (struct sockaddr_in *)&ifa->address.sin;
 		ipv4p = (struct sctp_ipv4addr_param *)parmh;
 		parmh->param_type = htons(SCTP_IPV4_ADDRESS);
 		parmh->param_length = htons(plen);
 		ipv4p->addr = sin->sin_addr.s_addr;
 		SCTP_BUF_LEN(mret) += plen;
 		break;
 	}
 #endif
 #ifdef INET6
 	case AF_INET6:
 	{
 		struct sctp_ipv6addr_param *ipv6p;
 		struct sockaddr_in6 *sin6;
 		sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
 		ipv6p = (struct sctp_ipv6addr_param *)parmh;
 		parmh->param_type = htons(SCTP_IPV6_ADDRESS);
 		parmh->param_length = htons(plen);
 		memcpy(ipv6p->addr, &sin6->sin6_addr,
 		    sizeof(ipv6p->addr));
 #if defined(SCTP_EMBEDDED_V6_SCOPE)
 		/* clear embedded scope in the address */
 		in6_clearscope((struct in6_addr *)ipv6p->addr);
 #endif
 		SCTP_BUF_LEN(mret) += plen;
 		break;
 	}
 #endif
 	default:
 		return (m);
 	}
 	if (len != NULL) {
 		*len += plen;
 	}
 	return (mret);
 #endif
 }
 struct mbuf *
 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
                            struct sctp_scoping *scope,
 			   struct mbuf *m_at, int cnt_inits_to,
 			   uint16_t *padding_len, uint16_t *chunk_len)
 {
 	struct sctp_vrf *vrf = NULL;
 	int cnt, limit_out = 0, total_count;
 	uint32_t vrf_id;
 	vrf_id = inp->def_vrf_id;
 	SCTP_IPI_ADDR_RLOCK();
 	vrf = sctp_find_vrf(vrf_id);
 	if (vrf == NULL) {
 		SCTP_IPI_ADDR_RUNLOCK();
 		return (m_at);
 	}
 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 		struct sctp_ifa *sctp_ifap;
 		struct sctp_ifn *sctp_ifnp;
 		cnt = cnt_inits_to;
 		if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
 			limit_out = 1;
 			cnt = SCTP_ADDRESS_LIMIT;
 			goto skip_count;
 		}
 		LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
 			if ((scope->loopback_scope == 0) &&
 			    SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
 				/*
 				 * Skip loopback devices if loopback_scope
 				 * not set
 				 */
 				continue;
 			}
 			LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
 				if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
 					continue;
 				}
 #if defined(__Userspace__)
 				if (sctp_ifap->address.sa.sa_family == AF_CONN) {
 					continue;
 				}
 #endif
 				if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) {
 					continue;
 				}
 				cnt++;
 				if (cnt > SCTP_ADDRESS_LIMIT) {
 					break;
 				}
 			}
 			if (cnt > SCTP_ADDRESS_LIMIT) {
 				break;
 			}
 		}
 	skip_count:
 		if (cnt > 1) {
 			total_count = 0;
 			LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
 				cnt = 0;
 				if ((scope->loopback_scope == 0) &&
 				    SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
 					/*
 					 * Skip loopback devices if
 					 * loopback_scope not set
 					 */
 					continue;
 				}
 				LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
 					if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
 						continue;
 					}
 #if defined(__Userspace__)
 					if (sctp_ifap->address.sa.sa_family == AF_CONN) {
 						continue;
 					}
 #endif
 					if (sctp_is_address_in_scope(sctp_ifap,
 								     scope, 0) == 0) {
 						continue;
 					}
 					if ((chunk_len != NULL) &&
 					    (padding_len != NULL) &&
 					    (*padding_len > 0)) {
 						memset(mtod(m_at, caddr_t) + *chunk_len, 0, *padding_len);
 						SCTP_BUF_LEN(m_at) += *padding_len;
 						*chunk_len += *padding_len;
 						*padding_len = 0;
 					}
 					m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len);
 					if (limit_out) {
 						cnt++;
 						total_count++;
 						if (cnt >= 2) {
 							/* two from each address */
 							break;
 						}
 						if (total_count > SCTP_ADDRESS_LIMIT) {
 							/* No more addresses */
 							break;
 						}
 					}
 				}
 			}
 		}
 	} else {
 		struct sctp_laddr *laddr;
 		cnt = cnt_inits_to;
 		/* First, how many ? */
 		LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 			if (laddr->ifa == NULL) {
 				continue;
 			}
 			if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
                                 /* Address being deleted by the system, dont
 				 * list.
 				 */
 				continue;
 			if (laddr->action == SCTP_DEL_IP_ADDRESS) {
 				/* Address being deleted on this ep
 				 * don't list.
 				 */
 				continue;
 			}
 #if defined(__Userspace__)
 			if (laddr->ifa->address.sa.sa_family == AF_CONN) {
 				continue;
 			}
 #endif
 			if (sctp_is_address_in_scope(laddr->ifa,
 						     scope, 1) == 0) {
 				continue;
 			}
 			cnt++;
 		}
 		/*
 		 * To get through a NAT we only list addresses if we have
 		 * more than one. That way if you just bind a single address
 		 * we let the source of the init dictate our address.
 		 */
 		if (cnt > 1) {
 			cnt = cnt_inits_to;
 			LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 				if (laddr->ifa == NULL) {
 					continue;
 				}
 				if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 					continue;
 				}
 #if defined(__Userspace__)
 				if (laddr->ifa->address.sa.sa_family == AF_CONN) {
 					continue;
 				}
 #endif
 				if (sctp_is_address_in_scope(laddr->ifa,
 							     scope, 0) == 0) {
 					continue;
 				}
 				if ((chunk_len != NULL) &&
 				    (padding_len != NULL) &&
 				    (*padding_len > 0)) {
 					memset(mtod(m_at, caddr_t) + *chunk_len, 0, *padding_len);
 					SCTP_BUF_LEN(m_at) += *padding_len;
 					*chunk_len += *padding_len;
 					*padding_len = 0;
 				}
 				m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len);
 				cnt++;
 				if (cnt >= SCTP_ADDRESS_LIMIT) {
 					break;
 				}
 			}
 		}
 	}
 	SCTP_IPI_ADDR_RUNLOCK();
 	return (m_at);
 }
 static struct sctp_ifa *
 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
 			   uint8_t dest_is_loop,
 			   uint8_t dest_is_priv,
 			   sa_family_t fam)
 {
 	uint8_t dest_is_global = 0;
 	/* dest_is_priv is true if destination is a private address */
 	/* dest_is_loop is true if destination is a loopback addresses */
 	/**
 	 * Here we determine if its a preferred address. A preferred address
 	 * means it is the same scope or higher scope then the destination.
 	 * L = loopback, P = private, G = global
 	 * -----------------------------------------
 	 *    src    |  dest | result
 	 *  ----------------------------------------
 	 *     L     |    L  |    yes
 	 *  -----------------------------------------
 	 *     P     |    L  |    yes-v4 no-v6
 	 *  -----------------------------------------
 	 *     G     |    L  |    yes-v4 no-v6
 	 *  -----------------------------------------
 	 *     L     |    P  |    no
 	 *  -----------------------------------------
 	 *     P     |    P  |    yes
 	 *  -----------------------------------------
 	 *     G     |    P  |    no
 	 *   -----------------------------------------
 	 *     L     |    G  |    no
 	 *   -----------------------------------------
 	 *     P     |    G  |    no
 	 *    -----------------------------------------
 	 *     G     |    G  |    yes
 	 *    -----------------------------------------
 	 */
 	if (ifa->address.sa.sa_family != fam) {
 		/* forget mis-matched family */
 		return (NULL);
 	}
 	if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
 		dest_is_global = 1;
 	}
 	SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
 	SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
 	/* Ok the address may be ok */
 #ifdef INET6
 	if (fam == AF_INET6) {
 		/* ok to use deprecated addresses? no lets not! */
 		if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 			SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
 			return (NULL);
 		}
 		if (ifa->src_is_priv && !ifa->src_is_loop) {
 			if (dest_is_loop) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
 				return (NULL);
 			}
 		}
 		if (ifa->src_is_glob) {
 			if (dest_is_loop) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
 				return (NULL);
 			}
 		}
 	}
 #endif
 	/* Now that we know what is what, implement or table
 	 * this could in theory be done slicker (it used to be), but this
 	 * is straightforward and easier to validate :-)
 	 */
 	SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
 		ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
 	SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
 		dest_is_loop, dest_is_priv, dest_is_global);
 	if ((ifa->src_is_loop) && (dest_is_priv)) {
 		SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
 		return (NULL);
 	}
 	if ((ifa->src_is_glob) && (dest_is_priv)) {
 		SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
 		return (NULL);
 	}
 	if ((ifa->src_is_loop) && (dest_is_global)) {
 		SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
 		return (NULL);
 	}
 	if ((ifa->src_is_priv) && (dest_is_global)) {
 		SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
 		return (NULL);
 	}
 	SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
 	/* its a preferred address */
 	return (ifa);
 }
 static struct sctp_ifa *
 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
 			    uint8_t dest_is_loop,
 			    uint8_t dest_is_priv,
 			    sa_family_t fam)
 {
 	uint8_t dest_is_global = 0;
 	/**
 	 * Here we determine if its a acceptable address. A acceptable
 	 * address means it is the same scope or higher scope but we can
 	 * allow for NAT which means its ok to have a global dest and a
 	 * private src.
 	 *
 	 * L = loopback, P = private, G = global
 	 * -----------------------------------------
 	 *  src    |  dest | result
 	 * -----------------------------------------
 	 *   L     |   L   |    yes
 	 *  -----------------------------------------
 	 *   P     |   L   |    yes-v4 no-v6
 	 *  -----------------------------------------
 	 *   G     |   L   |    yes
 	 * -----------------------------------------
 	 *   L     |   P   |    no
 	 * -----------------------------------------
 	 *   P     |   P   |    yes
 	 * -----------------------------------------
 	 *   G     |   P   |    yes - May not work
 	 * -----------------------------------------
 	 *   L     |   G   |    no
 	 * -----------------------------------------
 	 *   P     |   G   |    yes - May not work
 	 * -----------------------------------------
 	 *   G     |   G   |    yes
 	 * -----------------------------------------
 	 */
 	if (ifa->address.sa.sa_family != fam) {
 		/* forget non matching family */
 		SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
 			ifa->address.sa.sa_family, fam);
 		return (NULL);
 	}
 	/* Ok the address may be ok */
 	SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
 	SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
 		dest_is_loop, dest_is_priv);
 	if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
 		dest_is_global = 1;
 	}
 #ifdef INET6
 	if (fam == AF_INET6) {
 		/* ok to use deprecated addresses? */
 		if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 			return (NULL);
 		}
 		if (ifa->src_is_priv) {
 			/* Special case, linklocal to loop */
 			if (dest_is_loop)
 				return (NULL);
 		}
 	}
 #endif
 	/*
 	 * Now that we know what is what, implement our table.
 	 * This could in theory be done slicker (it used to be), but this
 	 * is straightforward and easier to validate :-)
 	 */
 	SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
 		ifa->src_is_loop,
 		dest_is_priv);
 	if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
 		return (NULL);
 	}
 	SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
 		ifa->src_is_loop,
 		dest_is_global);
 	if ((ifa->src_is_loop == 1) && (dest_is_global)) {
 		return (NULL);
 	}
 	SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
 	/* its an acceptable address */
 	return (ifa);
 }
 int
 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
 {
 	struct sctp_laddr *laddr;
 	if (stcb == NULL) {
 		/* There are no restrictions, no TCB :-) */
 		return (0);
 	}
 	LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
 		if (laddr->ifa == NULL) {
 			SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
 				__FUNCTION__);
 			continue;
 		}
 		if (laddr->ifa == ifa) {
 			/* Yes it is on the list */
 			return (1);
 		}
 	}
 	return (0);
 }
 int
 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
 {
 	struct sctp_laddr *laddr;
 	if (ifa == NULL)
 		return (0);
 	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 		if (laddr->ifa == NULL) {
 			SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
 				__FUNCTION__);
 			continue;
 		}
 		if ((laddr->ifa == ifa) && laddr->action == 0)
 			/* same pointer */
 			return (1);
 	}
 	return (0);
 }
 static struct sctp_ifa *
 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
 			      sctp_route_t *ro,
 			      uint32_t vrf_id,
 			      int non_asoc_addr_ok,
 			      uint8_t dest_is_priv,
 			      uint8_t dest_is_loop,
 			      sa_family_t fam)
 {
 	struct sctp_laddr *laddr, *starting_point;
 	void *ifn;
 	int resettotop = 0;
 	struct sctp_ifn *sctp_ifn;
 	struct sctp_ifa *sctp_ifa, *sifa;
 	struct sctp_vrf *vrf;
 	uint32_t ifn_index;
 	vrf = sctp_find_vrf(vrf_id);
 	if (vrf == NULL)
 		return (NULL);
 	ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
 	ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
 	sctp_ifn = sctp_find_ifn(ifn, ifn_index);
 	/*
 	 * first question, is the ifn we will emit on in our list, if so, we
 	 * want such an address. Note that we first looked for a
 	 * preferred address.
 	 */
 	if (sctp_ifn) {
 		/* is a preferred one on the interface we route out? */
 		LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 			if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
 			    (non_asoc_addr_ok == 0))
 				continue;
 			sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
 							  dest_is_loop,
 							  dest_is_priv, fam);
 			if (sifa == NULL)
 				continue;
 			if (sctp_is_addr_in_ep(inp, sifa)) {
 				atomic_add_int(&sifa->refcount, 1);
 				return (sifa);
 			}
 		}
 	}
 	/*
 	 * ok, now we now need to find one on the list of the addresses.
 	 * We can't get one on the emitting interface so let's find first
 	 * a preferred one. If not that an acceptable one otherwise...
 	 * we return NULL.
 	 */
 	starting_point = inp->next_addr_touse;
  once_again:
 	if (inp->next_addr_touse == NULL) {
 		inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
 		resettotop = 1;
 	}
 	for (laddr = inp->next_addr_touse; laddr;
 	     laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
 		if (laddr->ifa == NULL) {
 			/* address has been removed */
 			continue;
 		}
 		if (laddr->action == SCTP_DEL_IP_ADDRESS) {
 			/* address is being deleted */
 			continue;
 		}
 		sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
 						  dest_is_priv, fam);
 		if (sifa == NULL)
 			continue;
 		atomic_add_int(&sifa->refcount, 1);
 		return (sifa);
 	}
 	if (resettotop == 0) {
 		inp->next_addr_touse = NULL;
 		goto once_again;
 	}
 	inp->next_addr_touse = starting_point;
 	resettotop = 0;
  once_again_too:
 	if (inp->next_addr_touse == NULL) {
 		inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
 		resettotop = 1;
 	}
 	/* ok, what about an acceptable address in the inp */
 	for (laddr = inp->next_addr_touse; laddr;
 	     laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
 		if (laddr->ifa == NULL) {
 			/* address has been removed */
 			continue;
 		}
 		if (laddr->action == SCTP_DEL_IP_ADDRESS) {
 			/* address is being deleted */
 			continue;
 		}
 		sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
 						   dest_is_priv, fam);
 		if (sifa == NULL)
 			continue;
 		atomic_add_int(&sifa->refcount, 1);
 		return (sifa);
 	}
 	if (resettotop == 0) {
 		inp->next_addr_touse = NULL;
 		goto once_again_too;
 	}
 	/*
 	 * no address bound can be a source for the destination we are in
 	 * trouble
 	 */
 	return (NULL);
 }
 static struct sctp_ifa *
 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
 			       struct sctp_tcb *stcb,
 			       sctp_route_t *ro,
 			       uint32_t vrf_id,
 			       uint8_t dest_is_priv,
 			       uint8_t dest_is_loop,
 			       int non_asoc_addr_ok,
 			       sa_family_t fam)
 {
 	struct sctp_laddr *laddr, *starting_point;
 	void *ifn;
 	struct sctp_ifn *sctp_ifn;
 	struct sctp_ifa *sctp_ifa, *sifa;
 	uint8_t start_at_beginning = 0;
 	struct sctp_vrf *vrf;
 	uint32_t ifn_index;
 	/*
 	 * first question, is the ifn we will emit on in our list, if so, we
 	 * want that one.
 	 */
 	vrf = sctp_find_vrf(vrf_id);
 	if (vrf == NULL)
 		return (NULL);
 	ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
 	ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
 	sctp_ifn = sctp_find_ifn( ifn, ifn_index);
 	/*
  	 * first question, is the ifn we will emit on in our list?  If so,
 	 * we want that one. First we look for a preferred. Second, we go
 	 * for an acceptable.
 	 */
 	if (sctp_ifn) {
 		/* first try for a preferred address on the ep */
 		LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 			if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
 				continue;
 			if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
 				sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
 				if (sifa == NULL)
 					continue;
 				if (((non_asoc_addr_ok == 0) &&
 				     (sctp_is_addr_restricted(stcb, sifa))) ||
 				    (non_asoc_addr_ok &&
 				     (sctp_is_addr_restricted(stcb, sifa)) &&
 				     (!sctp_is_addr_pending(stcb, sifa)))) {
 					/* on the no-no list */
 					continue;
 				}
 				atomic_add_int(&sifa->refcount, 1);
 				return (sifa);
 			}
 		}
 		/* next try for an acceptable address on the ep */
 		LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 			if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
 				continue;
 			if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
 				sifa= sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv,fam);
 				if (sifa == NULL)
 					continue;
 				if (((non_asoc_addr_ok == 0) &&
 				     (sctp_is_addr_restricted(stcb, sifa))) ||
 				    (non_asoc_addr_ok &&
 				     (sctp_is_addr_restricted(stcb, sifa)) &&
 				     (!sctp_is_addr_pending(stcb, sifa)))) {
 					/* on the no-no list */
 					continue;
 				}
 				atomic_add_int(&sifa->refcount, 1);
 				return (sifa);
 			}
 		}
 	}
 	/*
 	 * if we can't find one like that then we must look at all
 	 * addresses bound to pick one at first preferable then
 	 * secondly acceptable.
 	 */
 	starting_point = stcb->asoc.last_used_address;
  sctp_from_the_top:
 	if (stcb->asoc.last_used_address == NULL) {
 		start_at_beginning = 1;
 		stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
 	}
 	/* search beginning with the last used address */
 	for (laddr = stcb->asoc.last_used_address; laddr;
 	     laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
 		if (laddr->ifa == NULL) {
 			/* address has been removed */
 			continue;
 		}
 		if (laddr->action == SCTP_DEL_IP_ADDRESS) {
 			/* address is being deleted */
 			continue;
 		}
 		sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
 		if (sifa == NULL)
 			continue;
 		if (((non_asoc_addr_ok == 0) &&
 		     (sctp_is_addr_restricted(stcb, sifa))) ||
 		    (non_asoc_addr_ok &&
 		     (sctp_is_addr_restricted(stcb, sifa)) &&
 		     (!sctp_is_addr_pending(stcb, sifa)))) {
 			/* on the no-no list */
 			continue;
 		}
 		stcb->asoc.last_used_address = laddr;
 		atomic_add_int(&sifa->refcount, 1);
 		return (sifa);
 	}
 	if (start_at_beginning == 0) {
 		stcb->asoc.last_used_address = NULL;
 		goto sctp_from_the_top;
 	}
 	/* now try for any higher scope than the destination */
 	stcb->asoc.last_used_address = starting_point;
 	start_at_beginning = 0;
  sctp_from_the_top2:
 	if (stcb->asoc.last_used_address == NULL) {
 		start_at_beginning = 1;
 		stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
 	}
 	/* search beginning with the last used address */
 	for (laddr = stcb->asoc.last_used_address; laddr;
 	     laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
 		if (laddr->ifa == NULL) {
 			/* address has been removed */
 			continue;
 		}
 		if (laddr->action == SCTP_DEL_IP_ADDRESS) {
 			/* address is being deleted */
 			continue;
 		}
 		sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
 						   dest_is_priv, fam);
 		if (sifa == NULL)
 			continue;
 		if (((non_asoc_addr_ok == 0) &&
 		     (sctp_is_addr_restricted(stcb, sifa))) ||
 		    (non_asoc_addr_ok &&
 		     (sctp_is_addr_restricted(stcb, sifa)) &&
 		     (!sctp_is_addr_pending(stcb, sifa)))) {
 			/* on the no-no list */
 			continue;
 		}
 		stcb->asoc.last_used_address = laddr;
 		atomic_add_int(&sifa->refcount, 1);
 		return (sifa);
 	}
 	if (start_at_beginning == 0) {
 		stcb->asoc.last_used_address = NULL;
 		goto sctp_from_the_top2;
 	}
 	return (NULL);
 }
 static struct sctp_ifa *
 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
 						 struct sctp_tcb *stcb,
 						 int non_asoc_addr_ok,
 						 uint8_t dest_is_loop,
 						 uint8_t dest_is_priv,
 						 int addr_wanted,
 						 sa_family_t fam,
 						 sctp_route_t *ro
 						 )
 {
 	struct sctp_ifa *ifa, *sifa;
 	int num_eligible_addr = 0;
 #ifdef INET6
 #ifdef SCTP_EMBEDDED_V6_SCOPE
 	struct sockaddr_in6 sin6, lsa6;
 	if (fam == AF_INET6) {
 		memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
 #ifdef SCTP_KAME
 		(void)sa6_recoverscope(&sin6);
 #else
 		(void)in6_recoverscope(&sin6, &sin6.sin6_addr, NULL);
 #endif  /* SCTP_KAME */
 	}
 #endif  /* SCTP_EMBEDDED_V6_SCOPE */
 #endif	/* INET6 */
 	LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
 		if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
 		    (non_asoc_addr_ok == 0))
 			continue;
 		sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
 						  dest_is_priv, fam);
 		if (sifa == NULL)
 			continue;
 #ifdef INET6
 		if (fam == AF_INET6 &&
 		    dest_is_loop &&
 		    sifa->src_is_loop && sifa->src_is_priv) {
 			/* don't allow fe80::1 to be a src on loop ::1, we don't list it
 			 * to the peer so we will get an abort.
 			 */
 			continue;
 		}
 #ifdef SCTP_EMBEDDED_V6_SCOPE
 		if (fam == AF_INET6 &&
 		    IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
 		    IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
 			/* link-local <-> link-local must belong to the same scope. */
 			memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
 #ifdef SCTP_KAME
 			(void)sa6_recoverscope(&lsa6);
 #else
 			(void)in6_recoverscope(&lsa6, &lsa6.sin6_addr, NULL);
 #endif  /* SCTP_KAME */
 			if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
 				continue;
 			}
 		}
 #endif  /* SCTP_EMBEDDED_V6_SCOPE */
 #endif	/* INET6 */
 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__Userspace__)
 		/* Check if the IPv6 address matches to next-hop.
 		   In the mobile case, old IPv6 address may be not deleted
 		   from the interface. Then, the interface has previous and
 		   new addresses.  We should use one corresponding to the
 		   next-hop.  (by micchie)
 		 */
 #ifdef INET6
 		if (stcb && fam == AF_INET6 &&
 		    sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
 			if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
 			    == 0) {
 				continue;
 			}
 		}
 #endif
 #ifdef INET
 		/* Avoid topologically incorrect IPv4 address */
 		if (stcb && fam == AF_INET &&
 		    sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
 			if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
 				continue;
 			}
 		}
 #endif
 #endif
 		if (stcb) {
 			if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
 				continue;
 			}
 			if (((non_asoc_addr_ok == 0) &&
 			     (sctp_is_addr_restricted(stcb, sifa))) ||
 			    (non_asoc_addr_ok &&
 			     (sctp_is_addr_restricted(stcb, sifa)) &&
 			     (!sctp_is_addr_pending(stcb, sifa)))) {
 				/*
 				 * It is restricted for some reason..
 				 * probably not yet added.
 				 */
 				continue;
 			}
 		}
 		if (num_eligible_addr >= addr_wanted) {
 			return (sifa);
 		}
 		num_eligible_addr++;
 	}
 	return (NULL);
 }
 static int
 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
 				  struct sctp_tcb *stcb,
 				  int non_asoc_addr_ok,
 				  uint8_t dest_is_loop,
 				  uint8_t dest_is_priv,
 				  sa_family_t fam)
 {
 	struct sctp_ifa *ifa, *sifa;
 	int num_eligible_addr = 0;
 	LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
 		if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
 		    (non_asoc_addr_ok == 0)) {
 			continue;
 		}
 		sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
 						  dest_is_priv, fam);
 		if (sifa == NULL) {
 			continue;
 		}
 		if (stcb) {
 			if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
 				continue;
 			}
 			if (((non_asoc_addr_ok == 0) &&
 			     (sctp_is_addr_restricted(stcb, sifa))) ||
 			    (non_asoc_addr_ok &&
 			     (sctp_is_addr_restricted(stcb, sifa)) &&
 			     (!sctp_is_addr_pending(stcb, sifa)))) {
 				/*
 				 * It is restricted for some reason..
 				 * probably not yet added.
 				 */
 				continue;
 			}
 		}
 		num_eligible_addr++;
 	}
 	return (num_eligible_addr);
 }
 static struct sctp_ifa *
 sctp_choose_boundall(struct sctp_tcb *stcb,
 		     struct sctp_nets *net,
 		     sctp_route_t *ro,
 		     uint32_t vrf_id,
 		     uint8_t dest_is_priv,
 		     uint8_t dest_is_loop,
 		     int non_asoc_addr_ok,
 		     sa_family_t fam)
 {
 	int cur_addr_num = 0, num_preferred = 0;
 	void *ifn;
 	struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
 	struct sctp_ifa *sctp_ifa, *sifa;
 	uint32_t ifn_index;
 	struct sctp_vrf *vrf;
 #ifdef INET
 	int retried = 0;
 #endif
 	/*-
 	 * For boundall we can use any address in the association.
 	 * If non_asoc_addr_ok is set we can use any address (at least in
 	 * theory). So we look for preferred addresses first. If we find one,
 	 * we use it. Otherwise we next try to get an address on the
 	 * interface, which we should be able to do (unless non_asoc_addr_ok
 	 * is false and we are routed out that way). In these cases where we
 	 * can't use the address of the interface we go through all the
 	 * ifn's looking for an address we can use and fill that in. Punting
 	 * means we send back address 0, which will probably cause problems
 	 * actually since then IP will fill in the address of the route ifn,
 	 * which means we probably already rejected it.. i.e. here comes an
 	 * abort :-<.
 	 */
 	vrf = sctp_find_vrf(vrf_id);
 	if (vrf == NULL)
 		return (NULL);
 	ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
 	ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
 	SCTPDBG(SCTP_DEBUG_OUTPUT2,"ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
 	emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
 	if (sctp_ifn == NULL) {
 		/* ?? We don't have this guy ?? */
 		SCTPDBG(SCTP_DEBUG_OUTPUT2,"No ifn emit interface?\n");
 		goto bound_all_plan_b;
 	}
 	SCTPDBG(SCTP_DEBUG_OUTPUT2,"ifn_index:%d name:%s is emit interface\n",
 		ifn_index, sctp_ifn->ifn_name);
 	if (net) {
 		cur_addr_num = net->indx_of_eligible_next_to_use;
 	}
 	num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
 							  stcb,
 							  non_asoc_addr_ok,
 							  dest_is_loop,
 							  dest_is_priv, fam);
 	SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
 		num_preferred, sctp_ifn->ifn_name);
 	if (num_preferred == 0) {
 		/*
 		 * no eligible addresses, we must use some other interface
 		 * address if we can find one.
 		 */
 		goto bound_all_plan_b;
 	}
 	/*
 	 * Ok we have num_eligible_addr set with how many we can use, this
 	 * may vary from call to call due to addresses being deprecated
 	 * etc..
 	 */
 	if (cur_addr_num >= num_preferred) {
 		cur_addr_num = 0;
 	}
 	/*
 	 * select the nth address from the list (where cur_addr_num is the
 	 * nth) and 0 is the first one, 1 is the second one etc...
 	 */
 	SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
 	sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
                                                                     dest_is_priv, cur_addr_num, fam, ro);
 	/* if sctp_ifa is NULL something changed??, fall to plan b. */
 	if (sctp_ifa) {
 		atomic_add_int(&sctp_ifa->refcount, 1);
 		if (net) {
 			/* save off where the next one we will want */
 			net->indx_of_eligible_next_to_use = cur_addr_num + 1;
 		}
 		return (sctp_ifa);
 	}
 	/*
 	 * plan_b: Look at all interfaces and find a preferred address. If
 	 * no preferred fall through to plan_c.
 	 */
  bound_all_plan_b:
 	SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
 	LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 		SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
 			sctp_ifn->ifn_name);
 		if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 			/* wrong base scope */
 			SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
 			continue;
 		}
 		if ((sctp_ifn == looked_at) && looked_at) {
 			/* already looked at this guy */
 			SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
 			continue;
 		}
 		num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, stcb, non_asoc_addr_ok,
                                                                   dest_is_loop, dest_is_priv, fam);
 		SCTPDBG(SCTP_DEBUG_OUTPUT2,
 			"Found ifn:%p %d preferred source addresses\n",
 			ifn, num_preferred);
 		if (num_preferred == 0) {
 			/* None on this interface. */
 			SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefered -- skipping to next\n");
 			continue;
 		}
 		SCTPDBG(SCTP_DEBUG_OUTPUT2,
 			"num preferred:%d on interface:%p cur_addr_num:%d\n",
 			num_preferred, (void *)sctp_ifn, cur_addr_num);
 		/*
 		 * Ok we have num_eligible_addr set with how many we can
 		 * use, this may vary from call to call due to addresses
 		 * being deprecated etc..
 		 */
 		if (cur_addr_num >= num_preferred) {
 			cur_addr_num = 0;
 		}
 		sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
                                                                         dest_is_priv, cur_addr_num, fam, ro);
 		if (sifa == NULL)
 			continue;
 		if (net) {
 			net->indx_of_eligible_next_to_use = cur_addr_num + 1;
 			SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
 				cur_addr_num);
 			SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
 			SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
 			SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
 			SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
 		}
 		atomic_add_int(&sifa->refcount, 1);
 		return (sifa);
 	}
 #ifdef INET
 again_with_private_addresses_allowed:
 #endif
 	/* plan_c: do we have an acceptable address on the emit interface */
 	sifa = NULL;
 	SCTPDBG(SCTP_DEBUG_OUTPUT2,"Trying Plan C: find acceptable on interface\n");
 	if (emit_ifn == NULL) {
 		SCTPDBG(SCTP_DEBUG_OUTPUT2,"Jump to Plan D - no emit_ifn\n");
 		goto plan_d;
 	}
 	LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
 		SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
 		if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
 		    (non_asoc_addr_ok == 0)) {
 			SCTPDBG(SCTP_DEBUG_OUTPUT2,"Defer\n");
 			continue;
 		}
 		sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
 						   dest_is_priv, fam);
 		if (sifa == NULL) {
 			SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
 			continue;
 		}
 		if (stcb) {
 			if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
 				sifa = NULL;
 				continue;
 			}
 			if (((non_asoc_addr_ok == 0) &&
 			     (sctp_is_addr_restricted(stcb, sifa))) ||
 			    (non_asoc_addr_ok &&
 			     (sctp_is_addr_restricted(stcb, sifa)) &&
 			     (!sctp_is_addr_pending(stcb, sifa)))) {
 				/*
 				 * It is restricted for some
 				 * reason.. probably not yet added.
 				 */
 				SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its resticted\n");
 				sifa = NULL;
 				continue;
 			}
 		} else {
 			SCTP_PRINTF("Stcb is null - no print\n");
 		}
 		atomic_add_int(&sifa->refcount, 1);
 		goto out;
 	}
  plan_d:
 	/*
 	 * plan_d: We are in trouble. No preferred address on the emit
 	 * interface. And not even a preferred address on all interfaces.
 	 * Go out and see if we can find an acceptable address somewhere
 	 * amongst all interfaces.
 	 */
 	SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
 	LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 		if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 			/* wrong base scope */
 			continue;
 		}
 		LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 			if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
 			    (non_asoc_addr_ok == 0))
 				continue;
 			sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
 							   dest_is_loop,
 							   dest_is_priv, fam);
 			if (sifa == NULL)
 				continue;
 			if (stcb) {
 				if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
 					sifa = NULL;
 					continue;
 				}
 				if (((non_asoc_addr_ok == 0) &&
 				     (sctp_is_addr_restricted(stcb, sifa))) ||
 				    (non_asoc_addr_ok &&
 				     (sctp_is_addr_restricted(stcb, sifa)) &&
 				     (!sctp_is_addr_pending(stcb, sifa)))) {
 					/*
 					 * It is restricted for some
 					 * reason.. probably not yet added.
 					 */
 					sifa = NULL;
 					continue;
 				}
 			}
 			goto out;
 		}
 	}
 #ifdef INET
 	if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
 		stcb->asoc.scope.ipv4_local_scope = 1;
 		retried = 1;
 		goto again_with_private_addresses_allowed;
 	} else if (retried == 1) {
 		stcb->asoc.scope.ipv4_local_scope = 0;
 	}
 #endif
 out:
 #ifdef INET
 	if (sifa) {
 		if (retried == 1) {
 			LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 				if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 					/* wrong base scope */
 					continue;
 				}
 				LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 					struct sctp_ifa *tmp_sifa;
 					if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
 					    (non_asoc_addr_ok == 0))
 						continue;
 					tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
 					                                       dest_is_loop,
 					                                       dest_is_priv, fam);
 					if (tmp_sifa == NULL) {
 						continue;
 					}
 					if (tmp_sifa == sifa) {
 						continue;
 					}
 					if (stcb) {
 						if (sctp_is_address_in_scope(tmp_sifa,
 						                             &stcb->asoc.scope, 0) == 0) {
 							continue;
 						}
 						if (((non_asoc_addr_ok == 0) &&
 						     (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
 						    (non_asoc_addr_ok &&
 						     (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
 						     (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
 							/*
 							 * It is restricted for some
 							 * reason.. probably not yet added.
 							 */
 							continue;
 						}
 					}
 					if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
 					    (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
 						sctp_add_local_addr_restricted(stcb, tmp_sifa);
 					}
 				}
 			}
 		}
 		atomic_add_int(&sifa->refcount, 1);
 	}
 #endif
 	return (sifa);
 }
 /* tcb may be NULL */
 struct sctp_ifa *
 sctp_source_address_selection(struct sctp_inpcb *inp,
 			      struct sctp_tcb *stcb,
 			      sctp_route_t *ro,
 			      struct sctp_nets *net,
 			      int non_asoc_addr_ok, uint32_t vrf_id)
 {
 	struct sctp_ifa *answer;
 	uint8_t dest_is_priv, dest_is_loop;
 	sa_family_t fam;
 #ifdef INET
 	struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
 #endif
 #ifdef INET6
 	struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
 #endif
 	/**
 	 * Rules: - Find the route if needed, cache if I can. - Look at
 	 * interface address in route, Is it in the bound list. If so we
 	 * have the best source. - If not we must rotate amongst the
 	 * addresses.
 	 *
 	 * Cavets and issues
 	 *
 	 * Do we need to pay attention to scope. We can have a private address
 	 * or a global address we are sourcing or sending to. So if we draw
 	 * it out
 	 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
 	 * For V4
 	 * ------------------------------------------
 	 *      source     *      dest  *  result
 	 * -----------------------------------------
 	 * <a>  Private    *    Global  *  NAT
 	 * -----------------------------------------
 	 * <b>  Private    *    Private *  No problem
 	 * -----------------------------------------
 	 * <c>  Global     *    Private *  Huh, How will this work?
 	 * -----------------------------------------
 	 * <d>  Global     *    Global  *  No Problem
 	 *------------------------------------------
 	 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
 	 * For V6
 	 *------------------------------------------
 	 *      source     *      dest  *  result
 	 * -----------------------------------------
 	 * <a>  Linklocal  *    Global  *
 	 * -----------------------------------------
 	 * <b>  Linklocal  * Linklocal  *  No problem
 	 * -----------------------------------------
 	 * <c>  Global     * Linklocal  *  Huh, How will this work?
 	 * -----------------------------------------
 	 * <d>  Global     *    Global  *  No Problem
 	 *------------------------------------------
 	 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
 	 *
 	 * And then we add to that what happens if there are multiple addresses
 	 * assigned to an interface. Remember the ifa on a ifn is a linked
 	 * list of addresses. So one interface can have more than one IP
 	 * address. What happens if we have both a private and a global
 	 * address? Do we then use context of destination to sort out which
 	 * one is best? And what about NAT's sending P->G may get you a NAT
 	 * translation, or should you select the G thats on the interface in
 	 * preference.
 	 *
 	 * Decisions:
 	 *
 	 * - count the number of addresses on the interface.
 	 * - if it is one, no problem except case <c>.
 	 *   For <a> we will assume a NAT out there.
 	 * - if there are more than one, then we need to worry about scope P
 	 *   or G. We should prefer G -> G and P -> P if possible.
 	 *   Then as a secondary fall back to mixed types G->P being a last
 	 *   ditch one.
 	 * - The above all works for bound all, but bound specific we need to
 	 *   use the same concept but instead only consider the bound
 	 *   addresses. If the bound set is NOT assigned to the interface then
 	 *   we must use rotation amongst the bound addresses..
 	 */
 	if (ro->ro_rt == NULL) {
 		/*
 		 * Need a route to cache.
 		 */
 		SCTP_RTALLOC(ro, vrf_id);
 	}
 	if (ro->ro_rt == NULL) {
 		return (NULL);
 	}
 	fam = ro->ro_dst.sa_family;
 	dest_is_priv = dest_is_loop = 0;
 	/* Setup our scopes for the destination */
 	switch (fam) {
 #ifdef INET
 	case AF_INET:
 		/* Scope based on outbound address */
 		if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
 			dest_is_loop = 1;
 			if (net != NULL) {
 				/* mark it as local */
 				net->addr_is_local = 1;
 			}
 		} else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
 			dest_is_priv = 1;
 		}
 		break;
 #endif
 #ifdef INET6
 	case AF_INET6:
 		/* Scope based on outbound address */
 #if defined(__Userspace_os_Windows)
 		if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
 #else
 		if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
 		    SCTP_ROUTE_IS_REAL_LOOP(ro)) {
 #endif
 			/*
 			 * If the address is a loopback address, which
 			 * consists of "::1" OR "fe80::1%lo0", we are loopback
 			 * scope. But we don't use dest_is_priv (link local
 			 * addresses).
 			 */
 			dest_is_loop = 1;
 			if (net != NULL) {
 				/* mark it as local */
 				net->addr_is_local = 1;
 			}
 		} else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
 			dest_is_priv = 1;
 		}
 		break;
 #endif
 	}
 	SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
 	SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
 	SCTP_IPI_ADDR_RLOCK();
 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 		/*
 		 * Bound all case
 		 */
 		answer = sctp_choose_boundall(stcb, net, ro, vrf_id,
 					      dest_is_priv, dest_is_loop,
 					      non_asoc_addr_ok, fam);
 		SCTP_IPI_ADDR_RUNLOCK();
 		return (answer);
 	}
 	/*
 	 * Subset bound case
 	 */
 	if (stcb) {
 		answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
 							vrf_id,	dest_is_priv,
 							dest_is_loop,
 							non_asoc_addr_ok, fam);
 	} else {
 		answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
 						       non_asoc_addr_ok,
 						       dest_is_priv,
 						       dest_is_loop, fam);
 	}
 	SCTP_IPI_ADDR_RUNLOCK();
 	return (answer);
 }
 static int
 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
 {
 #if defined(__Userspace_os_Windows)
 	WSACMSGHDR cmh;
 #else
 	struct cmsghdr cmh;
 #endif
 	int tlen, at, found;
 	struct sctp_sndinfo sndinfo;
 	struct sctp_prinfo prinfo;
 	struct sctp_authinfo authinfo;
 	tlen = SCTP_BUF_LEN(control);
 	at = 0;
 	found = 0;
 	/*
 	 * Independent of how many mbufs, find the c_type inside the control
 	 * structure and copy out the data.
 	 */
 	while (at < tlen) {
 		if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
 			/* There is not enough room for one more. */
 			return (found);
 		}
 		m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
 		if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
 			/* We dont't have a complete CMSG header. */
 			return (found);
 		}
 		if (((int)cmh.cmsg_len + at) > tlen) {
 			/* We don't have the complete CMSG. */
 			return (found);
 		}
 		if ((cmh.cmsg_level == IPPROTO_SCTP) &&
 		    ((c_type == cmh.cmsg_type) ||
 		     ((c_type == SCTP_SNDRCV) &&
 		      ((cmh.cmsg_type == SCTP_SNDINFO) ||
 		       (cmh.cmsg_type == SCTP_PRINFO) ||
 		       (cmh.cmsg_type == SCTP_AUTHINFO))))) {
 			if (c_type == cmh.cmsg_type) {
 				if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < cpsize) {
 					return (found);
 				}
 				/* It is exactly what we want. Copy it out. */
 				m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), cpsize, (caddr_t)data);
 				return (1);
 			} else {
 				struct sctp_sndrcvinfo *sndrcvinfo;
 				sndrcvinfo = (struct sctp_sndrcvinfo *)data;
 				if (found == 0) {
 					if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
 						return (found);
 					}
 					memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
 				}
 				switch (cmh.cmsg_type) {
 				case SCTP_SNDINFO:
 					if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_sndinfo)) {
 						return (found);
 					}
 					m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
 					sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
 					sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
 					sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
 					sndrcvinfo->sinfo_context = sndinfo.snd_context;
 					sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
 					break;
 				case SCTP_PRINFO:
 					if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_prinfo)) {
 						return (found);
 					}
 					m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
 					if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
 						sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
 					} else {
 						sndrcvinfo->sinfo_timetolive = 0;
 					}
 					sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
 					break;
 				case SCTP_AUTHINFO:
 					if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_authinfo)) {
 						return (found);
 					}
 					m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
 					sndrcvinfo->sinfo_keynumber_valid = 1;
 					sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
 					break;
 				default:
 					return (found);
 				}
 				found = 1;
 			}
 		}
 		at += CMSG_ALIGN(cmh.cmsg_len);
 	}
 	return (found);
 }
 static int
 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
 {
 #if defined(__Userspace_os_Windows)
 	WSACMSGHDR cmh;
 #else
 	struct cmsghdr cmh;
 #endif
 	int tlen, at;
 	struct sctp_initmsg initmsg;
 #ifdef INET
 	struct sockaddr_in sin;
 #endif
 #ifdef INET6
 	struct sockaddr_in6 sin6;
 #endif
 	tlen = SCTP_BUF_LEN(control);
 	at = 0;
 	while (at < tlen) {
 		if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
 			/* There is not enough room for one more. */
 			*error = EINVAL;
 			return (1);
 		}
 		m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
 		if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
 			/* We dont't have a complete CMSG header. */
 			*error = EINVAL;
 			return (1);
 		}
 		if (((int)cmh.cmsg_len + at) > tlen) {
 			/* We don't have the complete CMSG. */
 			*error = EINVAL;
 			return (1);
 		}
 		if (cmh.cmsg_level == IPPROTO_SCTP) {
 			switch (cmh.cmsg_type) {
 			case SCTP_INIT:
 				if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) {
 					*error = EINVAL;
 					return (1);
 				}
 				m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
 				if (initmsg.sinit_max_attempts)
 					stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
 				if (initmsg.sinit_num_ostreams)
 					stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
 				if (initmsg.sinit_max_instreams)
 					stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
 				if (initmsg.sinit_max_init_timeo)
 					stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
 				if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
 					struct sctp_stream_out *tmp_str;
 					unsigned int i;
 					/* Default is NOT correct */
 					SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
 						stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
 					SCTP_TCB_UNLOCK(stcb);
 					SCTP_MALLOC(tmp_str,
 					            struct sctp_stream_out *,
 					            (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
 					            SCTP_M_STRMO);
 					SCTP_TCB_LOCK(stcb);
 					if (tmp_str != NULL) {
 						SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
 						stcb->asoc.strmout = tmp_str;
 						stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
 					} else {
 						stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
 					}
 					for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
 						TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
 						stcb->asoc.strmout[i].chunks_on_queues = 0;
 						stcb->asoc.strmout[i].next_sequence_send = 0;
 						stcb->asoc.strmout[i].stream_no = i;
 						stcb->asoc.strmout[i].last_msg_incomplete = 0;
 						stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
 					}
 				}
 				break;
 #ifdef INET
 			case SCTP_DSTADDRV4:
 				if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
 					*error = EINVAL;
 					return (1);
 				}
 				memset(&sin, 0, sizeof(struct sockaddr_in));
 				sin.sin_family = AF_INET;
 #ifdef HAVE_SIN_LEN
 				sin.sin_len = sizeof(struct sockaddr_in);
 #endif
 				sin.sin_port = stcb->rport;
 				m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
 				if ((sin.sin_addr.s_addr == INADDR_ANY) ||
 				    (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
 				    IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
 					*error = EINVAL;
 					return (1);
 				}
 				if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
 				                         SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
 					*error = ENOBUFS;
 					return (1);
 				}
 				break;
 #endif
 #ifdef INET6
 			case SCTP_DSTADDRV6:
 				if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
 					*error = EINVAL;
 					return (1);
 				}
 				memset(&sin6, 0, sizeof(struct sockaddr_in6));
 				sin6.sin6_family = AF_INET6;
 #ifdef HAVE_SIN6_LEN
 				sin6.sin6_len = sizeof(struct sockaddr_in6);
 #endif
 				sin6.sin6_port = stcb->rport;
 				m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
 				if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
 				    IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
 					*error = EINVAL;
 					return (1);
 				}
 #ifdef INET
 				if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
 					in6_sin6_2_sin(&sin, &sin6);
 					if ((sin.sin_addr.s_addr == INADDR_ANY) ||
 					    (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
 					    IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
 						*error = EINVAL;
 						return (1);
 					}
 					if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
 					                         SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
 						*error = ENOBUFS;
 						return (1);
 					}
 				} else
 #endif
 					if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL,
 					                         SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
 						*error = ENOBUFS;
 						return (1);
 					}
 				break;
 #endif
 			default:
 				break;
 			}
 		}
 		at += CMSG_ALIGN(cmh.cmsg_len);
 	}
 	return (0);
 }
 static struct sctp_tcb *
 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
                            uint16_t port,
                            struct mbuf *control,
                            struct sctp_nets **net_p,
                            int *error)
 {
 #if defined(__Userspace_os_Windows)
 	WSACMSGHDR cmh;
 #else
 	struct cmsghdr cmh;
 #endif
 	int tlen, at;
 	struct sctp_tcb *stcb;
 	struct sockaddr *addr;
 #ifdef INET
 	struct sockaddr_in sin;
 #endif
 #ifdef INET6
 	struct sockaddr_in6 sin6;
 #endif
 	tlen = SCTP_BUF_LEN(control);
 	at = 0;
 	while (at < tlen) {
 		if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
 			/* There is not enough room for one more. */
 			*error = EINVAL;
 			return (NULL);
 		}
 		m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
 		if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
 			/* We dont't have a complete CMSG header. */
 			*error = EINVAL;
 			return (NULL);
 		}
 		if (((int)cmh.cmsg_len + at) > tlen) {
 			/* We don't have the complete CMSG. */
 			*error = EINVAL;
 			return (NULL);
 		}
 		if (cmh.cmsg_level == IPPROTO_SCTP) {
 			switch (cmh.cmsg_type) {
 #ifdef INET
 			case SCTP_DSTADDRV4:
 				if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
 					*error = EINVAL;
 					return (NULL);
 				}
 				memset(&sin, 0, sizeof(struct sockaddr_in));
 				sin.sin_family = AF_INET;
 #ifdef HAVE_SIN_LEN
 				sin.sin_len = sizeof(struct sockaddr_in);
 #endif
 				sin.sin_port = port;
 				m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
 				addr = (struct sockaddr *)&sin;
 				break;
 #endif
 #ifdef INET6
 			case SCTP_DSTADDRV6:
 				if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
 					*error = EINVAL;
 					return (NULL);
 				}
 				memset(&sin6, 0, sizeof(struct sockaddr_in6));
 				sin6.sin6_family = AF_INET6;
 #ifdef HAVE_SIN6_LEN
 				sin6.sin6_len = sizeof(struct sockaddr_in6);
 #endif
 				sin6.sin6_port = port;
 				m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
 #ifdef INET
 				if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
 					in6_sin6_2_sin(&sin, &sin6);
 					addr = (struct sockaddr *)&sin;
 				} else
 #endif
 					addr = (struct sockaddr *)&sin6;
 				break;
 #endif
 			default:
 				addr = NULL;
 				break;
 			}
 			if (addr) {
 				stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
 				if (stcb != NULL) {
 					return (stcb);
 				}
 			}
 		}
 		at += CMSG_ALIGN(cmh.cmsg_len);
 	}
 	return (NULL);
 }
 static struct mbuf *
 sctp_add_cookie(struct mbuf *init, int init_offset,
     struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t **signature)
 {
 	struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
 	struct sctp_state_cookie *stc;
 	struct sctp_paramhdr *ph;
 	uint8_t *foo;
 	int sig_offset;
 	uint16_t cookie_sz;
 	mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
 				      sizeof(struct sctp_paramhdr)), 0,
 				     M_NOWAIT, 1, MT_DATA);
 	if (mret == NULL) {
 		return (NULL);
 	}
 	copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
 	if (copy_init == NULL) {
 		sctp_m_freem(mret);
 		return (NULL);
 	}
 #ifdef SCTP_MBUF_LOGGING
 	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
 		struct mbuf *mat;
 		for (mat = copy_init; mat; mat = SCTP_BUF_NEXT(mat)) {
 			if (SCTP_BUF_IS_EXTENDED(mat)) {
 				sctp_log_mb(mat, SCTP_MBUF_ICOPY);
 			}
 		}
 	}
 #endif
 	copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
 	    M_NOWAIT);
 	if (copy_initack == NULL) {
 		sctp_m_freem(mret);
 		sctp_m_freem(copy_init);
 		return (NULL);
 	}
 #ifdef SCTP_MBUF_LOGGING
 	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
 		struct mbuf *mat;
 		for (mat = copy_initack; mat; mat = SCTP_BUF_NEXT(mat)) {
 			if (SCTP_BUF_IS_EXTENDED(mat)) {
 				sctp_log_mb(mat, SCTP_MBUF_ICOPY);
 			}
 		}
 	}
 #endif
 	/* easy side we just drop it on the end */
 	ph = mtod(mret, struct sctp_paramhdr *);
 	SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
 	    sizeof(struct sctp_paramhdr);
 	stc = (struct sctp_state_cookie *)((caddr_t)ph +
 	    sizeof(struct sctp_paramhdr));
 	ph->param_type = htons(SCTP_STATE_COOKIE);
 	ph->param_length = 0;	/* fill in at the end */
 	/* Fill in the stc cookie data */
 	memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
 	/* tack the INIT and then the INIT-ACK onto the chain */
 	cookie_sz = 0;
 	for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
 		cookie_sz += SCTP_BUF_LEN(m_at);
 		if (SCTP_BUF_NEXT(m_at) == NULL) {
 			SCTP_BUF_NEXT(m_at) = copy_init;
 			break;
 		}
 	}
 	for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
 		cookie_sz += SCTP_BUF_LEN(m_at);
 		if (SCTP_BUF_NEXT(m_at) == NULL) {
 			SCTP_BUF_NEXT(m_at) = copy_initack;
 			break;
 		}
 	}
 	for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
 		cookie_sz += SCTP_BUF_LEN(m_at);
 		if (SCTP_BUF_NEXT(m_at) == NULL) {
 			break;
 		}
 	}
 	sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
 	if (sig == NULL) {
 		/* no space, so free the entire chain */
 		sctp_m_freem(mret);
 		return (NULL);
 	}
 	SCTP_BUF_LEN(sig) = 0;
 	SCTP_BUF_NEXT(m_at) = sig;
 	sig_offset = 0;
 	foo = (uint8_t *) (mtod(sig, caddr_t) + sig_offset);
 	memset(foo, 0, SCTP_SIGNATURE_SIZE);
 	*signature = foo;
 	SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
 	cookie_sz += SCTP_SIGNATURE_SIZE;
 	ph->param_length = htons(cookie_sz);
 	return (mret);
 }
 static uint8_t
 sctp_get_ect(struct sctp_tcb *stcb)
 {
 	if ((stcb != NULL) && (stcb->asoc.ecn_allowed == 1)) {
 		return (SCTP_ECT0_BIT);
 	} else {
 		return (0);
 	}
 }
 #if defined(INET) || defined(INET6)
 static void
 sctp_handle_no_route(struct sctp_tcb *stcb,
                      struct sctp_nets *net,
                      int so_locked)
 {
 	SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
 	if (net) {
 		SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
 		SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
 		if (net->dest_state & SCTP_ADDR_CONFIRMED) {
 			if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
 				sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
 			                        stcb, 0,
 			                        (void *)net,
 			                        so_locked);
 				net->dest_state &= ~SCTP_ADDR_REACHABLE;
 				net->dest_state &= ~SCTP_ADDR_PF;
 			}
 		}
 		if (stcb) {
 			if (net == stcb->asoc.primary_destination) {
 				/* need a new primary */
 				struct sctp_nets *alt;
 				alt = sctp_find_alternate_net(stcb, net, 0);
 				if (alt != net) {
 					if (stcb->asoc.alternate) {
 						sctp_free_remote_addr(stcb->asoc.alternate);
 					}
 					stcb->asoc.alternate = alt;
 					atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
 					if (net->ro._s_addr) {
 						sctp_free_ifa(net->ro._s_addr);
 						net->ro._s_addr = NULL;
 					}
 					net->src_addr_selected = 0;
 				}
 			}
 		}
 	}
 }
 #endif
 static int
 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
     struct sctp_tcb *stcb,	/* may be NULL */
     struct sctp_nets *net,
     struct sockaddr *to,
     struct mbuf *m,
     uint32_t auth_offset,
     struct sctp_auth_chunk *auth,
     uint16_t auth_keyid,
     int nofragment_flag,
     int ecn_ok,
     int out_of_asoc_ok,
     uint16_t src_port,
     uint16_t dest_port,
     uint32_t v_tag,
     uint16_t port,
     union sctp_sockstore *over_addr,
 #if defined(__FreeBSD__)
     uint8_t use_mflowid, uint32_t mflowid,
 #endif
 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     int so_locked SCTP_UNUSED
 #else
     int so_locked
 #endif
     )
 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
 {
 	/**
 	 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
 	 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
 	 * - fill in the HMAC digest of any AUTH chunk in the packet.
 	 * - calculate and fill in the SCTP checksum.
 	 * - prepend an IP address header.
 	 * - if boundall use INADDR_ANY.
 	 * - if boundspecific do source address selection.
 	 * - set fragmentation option for ipV4.
 	 * - On return from IP output, check/adjust mtu size of output
 	 *   interface and smallest_mtu size as well.
 	 */
 	/* Will need ifdefs around this */
 #ifdef __Panda__
 	pakhandle_type o_pak;
 #endif
 	struct mbuf *newm;
 	struct sctphdr *sctphdr;
 	int packet_length;
 	int ret;
 #if defined(INET) || defined(INET6)
 	uint32_t vrf_id;
 #endif
 #if defined(INET) || defined(INET6)
 #if !defined(__Panda__)
 	struct mbuf *o_pak;
 #endif
 	sctp_route_t *ro = NULL;
 	struct udphdr *udp = NULL;
 #endif
 	uint8_t tos_value;
 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
 	struct socket *so = NULL;
 #endif
 #if defined(__APPLE__)
 	if (so_locked) {
 		sctp_lock_assert(SCTP_INP_SO(inp));
 		SCTP_TCB_LOCK_ASSERT(stcb);
 	} else {
 		sctp_unlock_assert(SCTP_INP_SO(inp));
 	}
 #endif
 	if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
 		SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
 		sctp_m_freem(m);
 		return (EFAULT);
 	}
 #if defined(INET) || defined(INET6)
 	if (stcb) {
 		vrf_id = stcb->asoc.vrf_id;
 	} else {
 		vrf_id = inp->def_vrf_id;
 	}
 #endif
 	/* fill in the HMAC digest for any AUTH chunk in the packet */
 	if ((auth != NULL) && (stcb != NULL)) {
 		sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
 	}
 	if (net) {
 		tos_value = net->dscp;
 	} else if (stcb) {
 		tos_value = stcb->asoc.default_dscp;
 	} else {
 		tos_value = inp->sctp_ep.default_dscp;
 	}
 	switch (to->sa_family) {
 #ifdef INET
 	case AF_INET:
 	{
 		struct ip *ip = NULL;
 		sctp_route_t iproute;
 		int len;
 		len = sizeof(struct ip) + sizeof(struct sctphdr);
 		if (port) {
 			len += sizeof(struct udphdr);
 		}
 		newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
 		if (newm == NULL) {
 			sctp_m_freem(m);
 			SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 			return (ENOMEM);
 		}
 		SCTP_ALIGN_TO_END(newm, len);
 		SCTP_BUF_LEN(newm) = len;
 		SCTP_BUF_NEXT(newm) = m;
 		m = newm;
 #if defined(__FreeBSD__)
 		if (net != NULL) {
 #ifdef INVARIANTS
 			if (net->flowidset == 0) {
 				panic("Flow ID not set");
 			}
 #endif
 			m->m_pkthdr.flowid = net->flowid;
 			m->m_flags |= M_FLOWID;
 		} else {
 			if (use_mflowid != 0) {
 				m->m_pkthdr.flowid = mflowid;
 				m->m_flags |= M_FLOWID;
 			}
 		}
 #endif
 		packet_length = sctp_calculate_len(m);
 		ip = mtod(m, struct ip *);
 		ip->ip_v = IPVERSION;
 		ip->ip_hl = (sizeof(struct ip) >> 2);
 		if (tos_value == 0) {
 			/*
 			 * This means especially, that it is not set at the
 			 * SCTP layer. So use the value from the IP layer.
 			 */
 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__Panda__) || defined(__Windows__) || defined(__Userspace__)
 			tos_value = inp->ip_inp.inp.inp_ip_tos;
 #else
 			tos_value = inp->inp_ip_tos;
 #endif
 		}
 		tos_value &= 0xfc;
 		if (ecn_ok) {
 			tos_value |= sctp_get_ect(stcb);
 		}
                 if ((nofragment_flag) && (port == 0)) {
 #if defined(__FreeBSD__)
 #if __FreeBSD_version >= 1000000
 			ip->ip_off = htons(IP_DF);
 #else
 			ip->ip_off = IP_DF;
 #endif
 #elif defined(WITH_CONVERT_IP_OFF) || defined(__APPLE__) || defined(__Userspace__)
 			ip->ip_off = IP_DF;
 #else
 			ip->ip_off = htons(IP_DF);
 #endif
 		} else {
 #if defined(__FreeBSD__) && __FreeBSD_version >= 1000000
 			ip->ip_off = htons(0);
 #else
 			ip->ip_off = 0;
 #endif
 		}
 #if defined(__FreeBSD__)
 		/* FreeBSD has a function for ip_id's */
 		ip->ip_id = ip_newid();
 #elif defined(RANDOM_IP_ID)
 		/* Apple has RANDOM_IP_ID switch */
 		ip->ip_id = htons(ip_randomid());
 #elif defined(__Userspace__)
                 ip->ip_id = htons(SCTP_IP_ID(inp)++);
 #else
 		ip->ip_id = SCTP_IP_ID(inp)++;
 #endif
 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__Panda__) || defined(__Windows__) || defined(__Userspace__)
 		ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
 #else
 		ip->ip_ttl = inp->inp_ip_ttl;
 #endif
 #if defined(__FreeBSD__) && __FreeBSD_version >= 1000000
 		ip->ip_len = htons(packet_length);
 #else
 		ip->ip_len = packet_length;
 #endif
 		ip->ip_tos = tos_value;
 		if (port) {
 			ip->ip_p = IPPROTO_UDP;
 		} else {
 			ip->ip_p = IPPROTO_SCTP;
 		}
 		ip->ip_sum = 0;
 		if (net == NULL) {
 			ro = &iproute;
 			memset(&iproute, 0, sizeof(iproute));
 #ifdef HAVE_SA_LEN
 			memcpy(&ro->ro_dst, to, to->sa_len);
 #else
 			memcpy(&ro->ro_dst, to, sizeof(struct sockaddr_in));
 #endif
 		} else {
 			ro = (sctp_route_t *)&net->ro;
 		}
 		/* Now the address selection part */
 		ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
 		/* call the routine to select the src address */
 		if (net && out_of_asoc_ok == 0) {
 			if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED|SCTP_ADDR_IFA_UNUSEABLE))) {
 				sctp_free_ifa(net->ro._s_addr);
 				net->ro._s_addr = NULL;
 				net->src_addr_selected = 0;
 				if (ro->ro_rt) {
 					RTFREE(ro->ro_rt);
 					ro->ro_rt = NULL;
 				}
 			}
 			if (net->src_addr_selected == 0) {
 				/* Cache the source address */
 				net->ro._s_addr = sctp_source_address_selection(inp,stcb,
 										ro, net, 0,
 										vrf_id);
 				net->src_addr_selected = 1;
 			}
 			if (net->ro._s_addr == NULL) {
 				/* No route to host */
 				net->src_addr_selected = 0;
 				sctp_handle_no_route(stcb, net, so_locked);
 				SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
 				sctp_m_freem(m);
 				return (EHOSTUNREACH);
 			}
 			ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
 		} else {
 			if (over_addr == NULL) {
 				struct sctp_ifa *_lsrc;
 				_lsrc = sctp_source_address_selection(inp, stcb, ro,
 				                                      net,
 				                                      out_of_asoc_ok,
 				                                      vrf_id);
 				if (_lsrc == NULL) {
 					sctp_handle_no_route(stcb, net, so_locked);
 					SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
 					sctp_m_freem(m);
 					return (EHOSTUNREACH);
 				}
 				ip->ip_src = _lsrc->address.sin.sin_addr;
 				sctp_free_ifa(_lsrc);
 			} else {
 				ip->ip_src = over_addr->sin.sin_addr;
 				SCTP_RTALLOC(ro, vrf_id);
 			}
 		}
 		if (port) {
 			if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
 				sctp_handle_no_route(stcb, net, so_locked);
 				SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
 				sctp_m_freem(m);
 				return (EHOSTUNREACH);
 			}
 			udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
 			udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
 			udp->uh_dport = port;
 			udp->uh_ulen = htons(packet_length - sizeof(struct ip));
 #if !defined(__Windows__) && !defined(__Userspace__)
 #if defined(__FreeBSD__) && ((__FreeBSD_version > 803000 && __FreeBSD_version < 900000) || __FreeBSD_version > 900000)
 			if (V_udp_cksum) {
 				udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
 			} else {
 				udp->uh_sum = 0;
 			}
 #else
 			udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
 #endif
 #else
 			udp->uh_sum = 0;
 #endif
 			sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
 		} else {
 			sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
 		}
 		sctphdr->src_port = src_port;
 		sctphdr->dest_port = dest_port;
 		sctphdr->v_tag = v_tag;
 		sctphdr->checksum = 0;
 		/*
 		 * If source address selection fails and we find no route
 		 * then the ip_output should fail as well with a
 		 * NO_ROUTE_TO_HOST type error. We probably should catch
 		 * that somewhere and abort the association right away
 		 * (assuming this is an INIT being sent).
 		 */
 		if (ro->ro_rt == NULL) {
 			/*
 			 * src addr selection failed to find a route (or
 			 * valid source addr), so we can't get there from
 			 * here (yet)!
 			 */
 			sctp_handle_no_route(stcb, net, so_locked);
 			SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
 			sctp_m_freem(m);
 			return (EHOSTUNREACH);
 		}
 		if (ro != &iproute) {
 			memcpy(&iproute, ro, sizeof(*ro));
 		}
 		SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
 			(uint32_t) (ntohl(ip->ip_src.s_addr)));
 		SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
 			(uint32_t)(ntohl(ip->ip_dst.s_addr)));
 		SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
 			(void *)ro->ro_rt);
 		if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
 			/* failed to prepend data, give up */
 			SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 			sctp_m_freem(m);
 			return (ENOMEM);
 		}
 		SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
 		if (port) {
 #if defined(SCTP_WITH_NO_CSUM)
 			SCTP_STAT_INCR(sctps_sendnocrc);
 #else
 			sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
 			SCTP_STAT_INCR(sctps_sendswcrc);
 #endif
 #if defined(__FreeBSD__) && ((__FreeBSD_version > 803000 && __FreeBSD_version < 900000) || __FreeBSD_version > 900000)
 			if (V_udp_cksum) {
 				SCTP_ENABLE_UDP_CSUM(o_pak);
 			}
 #else
 			SCTP_ENABLE_UDP_CSUM(o_pak);
 #endif
 		} else {
 #if defined(SCTP_WITH_NO_CSUM)
 			SCTP_STAT_INCR(sctps_sendnocrc);
 #else
 #if defined(__FreeBSD__) && __FreeBSD_version >= 800000
 			m->m_pkthdr.csum_flags = CSUM_SCTP;
 			m->m_pkthdr.csum_data = 0;
 			SCTP_STAT_INCR(sctps_sendhwcrc);
 #else
 			if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
 			      (stcb) && (stcb->asoc.scope.loopback_scope))) {
 				sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip));
 				SCTP_STAT_INCR(sctps_sendswcrc);
 			} else {
 				SCTP_STAT_INCR(sctps_sendnocrc);
 			}
 #endif
 #endif
 		}
 #ifdef SCTP_PACKET_LOGGING
 		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
 			sctp_packet_log(o_pak);
 #endif
 		/* send it out.  table id is taken from stcb */
 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
 		if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
 			so = SCTP_INP_SO(inp);
 			SCTP_SOCKET_UNLOCK(so, 0);
 		}
 #endif
 		SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
 		if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
 			atomic_add_int(&stcb->asoc.refcnt, 1);
 			SCTP_TCB_UNLOCK(stcb);
 			SCTP_SOCKET_LOCK(so, 0);
 			SCTP_TCB_LOCK(stcb);
 			atomic_subtract_int(&stcb->asoc.refcnt, 1);
 		}
 #endif
 		SCTP_STAT_INCR(sctps_sendpackets);
 		SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
 		if (ret)
 			SCTP_STAT_INCR(sctps_senderrors);
 		SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
 		if (net == NULL) {
 			/* free tempy routes */
 #if defined(__FreeBSD__) && __FreeBSD_version > 901000
 			RO_RTFREE(ro);
 #else
 			if (ro->ro_rt) {
 				RTFREE(ro->ro_rt);
 				ro->ro_rt = NULL;
 			}
 #endif
 		} else {
 			/* PMTU check versus smallest asoc MTU goes here */
 			if ((ro->ro_rt != NULL) &&
 			    (net->ro._s_addr)) {
 				uint32_t mtu;
 				mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
 				if (net->port) {
 					mtu -= sizeof(struct udphdr);
 				}
 				if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
 					sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
 					net->mtu = mtu;
 				}
 			} else if (ro->ro_rt == NULL) {
 				/* route was freed */
 				if (net->ro._s_addr &&
 				    net->src_addr_selected) {
 					sctp_free_ifa(net->ro._s_addr);
 					net->ro._s_addr = NULL;
 				}
 				net->src_addr_selected = 0;
 			}
 		}
 		return (ret);
 	}
 #endif
 #ifdef INET6
 	case AF_INET6:
 	{
 		uint32_t flowlabel, flowinfo;
 		struct ip6_hdr *ip6h;
 		struct route_in6 ip6route;
 #if !(defined(__Panda__) || defined(__Userspace__))
 		struct ifnet *ifp;
 #endif
 		struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
 		int prev_scope = 0;
 #ifdef SCTP_EMBEDDED_V6_SCOPE
 		struct sockaddr_in6 lsa6_storage;
 		int error;
 #endif
 		u_short prev_port = 0;
 		int len;
 		if (net) {
 			flowlabel = net->flowlabel;
 		} else if (stcb) {
 			flowlabel = stcb->asoc.default_flowlabel;
 		} else {
 			flowlabel = inp->sctp_ep.default_flowlabel;
 		}
 		if (flowlabel == 0) {
 			/*
 			 * This means especially, that it is not set at the
 			 * SCTP layer. So use the value from the IP layer.
 			 */
 #if defined(__APPLE__) && (!defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION))
 			flowlabel = ntohl(inp->ip_inp.inp.inp_flow);
 #else
 			flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
 #endif
 		}
 		flowlabel &= 0x000fffff;
 		len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr);
 		if (port) {
 			len += sizeof(struct udphdr);
 		}
 		newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
 		if (newm == NULL) {
 			sctp_m_freem(m);
 			SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 			return (ENOMEM);
 		}
 		SCTP_ALIGN_TO_END(newm, len);
 		SCTP_BUF_LEN(newm) = len;
 		SCTP_BUF_NEXT(newm) = m;
 		m = newm;
 #if defined(__FreeBSD__)
 		if (net != NULL) {
 #ifdef INVARIANTS
 			if (net->flowidset == 0) {
 				panic("Flow ID not set");
 			}
 #endif
 			m->m_pkthdr.flowid = net->flowid;
 			m->m_flags |= M_FLOWID;
 		} else {
 			if (use_mflowid != 0) {
 				m->m_pkthdr.flowid = mflowid;
 				m->m_flags |= M_FLOWID;
 			}
 		}
 #endif
 		packet_length = sctp_calculate_len(m);
 		ip6h = mtod(m, struct ip6_hdr *);
 		/* protect *sin6 from overwrite */
 		sin6 = (struct sockaddr_in6 *)to;
 		tmp = *sin6;
 		sin6 = &tmp;
 #ifdef SCTP_EMBEDDED_V6_SCOPE
 		/* KAME hack: embed scopeid */
 #if defined(__APPLE__)
 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
 		if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL) != 0)
 #else
 		if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL, NULL) != 0)
 #endif
 #elif defined(SCTP_KAME)
 		if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0)
 #else
 		if (in6_embedscope(&sin6->sin6_addr, sin6) != 0)
 #endif
 		{
 			SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 			return (EINVAL);
 		}
 #endif /* SCTP_EMBEDDED_V6_SCOPE */
 		if (net == NULL) {
 			memset(&ip6route, 0, sizeof(ip6route));
 			ro = (sctp_route_t *)&ip6route;
 #ifdef HAVE_SIN6_LEN
 			memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
 #else
 			memcpy(&ro->ro_dst, sin6, sizeof(struct sockaddr_in6));
 #endif
 		} else {
 			ro = (sctp_route_t *)&net->ro;
 		}
 		/*
 		 * We assume here that inp_flow is in host byte order within
 		 * the TCB!
 		 */
 		if (tos_value == 0) {
 			/*
 			 * This means especially, that it is not set at the
 			 * SCTP layer. So use the value from the IP layer.
 			 */
 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__Panda__) || defined(__Windows__) || defined(__Userspace__)
 #if defined(__APPLE__) && (!defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION))
 			tos_value = (ntohl(inp->ip_inp.inp.inp_flow) >> 20) & 0xff;
 #else
 			tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
 #endif
 #endif
 		}
 		tos_value &= 0xfc;
 		if (ecn_ok) {
 			tos_value |= sctp_get_ect(stcb);
 		}
 		flowinfo = 0x06;
 		flowinfo <<= 8;
 		flowinfo |= tos_value;
 		flowinfo <<= 20;
 		flowinfo |= flowlabel;
 		ip6h->ip6_flow = htonl(flowinfo);
 		if (port) {
 			ip6h->ip6_nxt = IPPROTO_UDP;
 		} else {
 			ip6h->ip6_nxt = IPPROTO_SCTP;
 		}
 		ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
 		ip6h->ip6_dst = sin6->sin6_addr;
 		/*
 		 * Add SRC address selection here: we can only reuse to a
 		 * limited degree the kame src-addr-sel, since we can try
 		 * their selection but it may not be bound.
 		 */
 		bzero(&lsa6_tmp, sizeof(lsa6_tmp));
 		lsa6_tmp.sin6_family = AF_INET6;
 #ifdef HAVE_SIN6_LEN
 		lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
 #endif
 		lsa6 = &lsa6_tmp;
 		if (net && out_of_asoc_ok == 0) {
 			if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED|SCTP_ADDR_IFA_UNUSEABLE))) {
 				sctp_free_ifa(net->ro._s_addr);
 				net->ro._s_addr = NULL;
 				net->src_addr_selected = 0;
 				if (ro->ro_rt) {
 					RTFREE(ro->ro_rt);
 					ro->ro_rt = NULL;
 				}
 			}
 			if (net->src_addr_selected == 0) {
 #ifdef SCTP_EMBEDDED_V6_SCOPE
 				sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 				/* KAME hack: embed scopeid */
 #if defined(__APPLE__)
 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
 				if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL) != 0)
 #else
 				if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL, NULL) != 0)
 #endif
 #elif defined(SCTP_KAME)
 				if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0)
 #else
 				if (in6_embedscope(&sin6->sin6_addr, sin6) != 0)
 #endif
 				{
 					SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 					return (EINVAL);
 				}
 #endif /* SCTP_EMBEDDED_V6_SCOPE */
 				/* Cache the source address */
 				net->ro._s_addr = sctp_source_address_selection(inp,
 										stcb,
 										ro,
 										net,
 ,
 										vrf_id);
 #ifdef SCTP_EMBEDDED_V6_SCOPE
 #ifdef SCTP_KAME
 				(void)sa6_recoverscope(sin6);
 #else
 				(void)in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
 #endif	/* SCTP_KAME */
 #endif	/* SCTP_EMBEDDED_V6_SCOPE */
 				net->src_addr_selected = 1;
 			}
 			if (net->ro._s_addr == NULL) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
 				net->src_addr_selected = 0;
 				sctp_handle_no_route(stcb, net, so_locked);
 				SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
 				sctp_m_freem(m);
 				return (EHOSTUNREACH);
 			}
 			lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
 		} else {
 #ifdef SCTP_EMBEDDED_V6_SCOPE
 			sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
 			/* KAME hack: embed scopeid */
 #if defined(__APPLE__)
 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
 			if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL) != 0)
 #else
 			if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL, NULL) != 0)
 #endif
 #elif defined(SCTP_KAME)
 			if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0)
 #else
 			if (in6_embedscope(&sin6->sin6_addr, sin6) != 0)
 #endif
 			  {
 				SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 				return (EINVAL);
 			  }
 #endif /* SCTP_EMBEDDED_V6_SCOPE */
 			if (over_addr == NULL) {
 				struct sctp_ifa *_lsrc;
 				_lsrc = sctp_source_address_selection(inp, stcb, ro,
 				                                      net,
 				                                      out_of_asoc_ok,
 				                                      vrf_id);
 				if (_lsrc == NULL) {
 					sctp_handle_no_route(stcb, net, so_locked);
 					SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
 					sctp_m_freem(m);
 					return (EHOSTUNREACH);
 				}
 				lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
 				sctp_free_ifa(_lsrc);
 			} else {
 				lsa6->sin6_addr = over_addr->sin6.sin6_addr;
 				SCTP_RTALLOC(ro, vrf_id);
 			}
 #ifdef SCTP_EMBEDDED_V6_SCOPE
 #ifdef SCTP_KAME
 			(void)sa6_recoverscope(sin6);
 #else
 			(void)in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
 #endif	/* SCTP_KAME */
 #endif	/* SCTP_EMBEDDED_V6_SCOPE */
 		}
 		lsa6->sin6_port = inp->sctp_lport;
 		if (ro->ro_rt == NULL) {
 			/*
 			 * src addr selection failed to find a route (or
 			 * valid source addr), so we can't get there from
 			 * here!
 			 */
 			sctp_handle_no_route(stcb, net, so_locked);
 			SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
 			sctp_m_freem(m);
 			return (EHOSTUNREACH);
 		}
 #ifndef SCOPEDROUTING
 #ifdef SCTP_EMBEDDED_V6_SCOPE
 		/*
 		 * XXX: sa6 may not have a valid sin6_scope_id in the
 		 * non-SCOPEDROUTING case.
 		 */
 		bzero(&lsa6_storage, sizeof(lsa6_storage));
 		lsa6_storage.sin6_family = AF_INET6;
 #ifdef HAVE_SIN6_LEN
 		lsa6_storage.sin6_len = sizeof(lsa6_storage);
 #endif
 #ifdef SCTP_KAME
 		lsa6_storage.sin6_addr = lsa6->sin6_addr;
 		if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
 #else
 		if ((error = in6_recoverscope(&lsa6_storage, &lsa6->sin6_addr,
 		    NULL)) != 0) {
 #endif				/* SCTP_KAME */
 			SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
 			sctp_m_freem(m);
 			return (error);
 		}
 		/* XXX */
 		lsa6_storage.sin6_addr = lsa6->sin6_addr;
 		lsa6_storage.sin6_port = inp->sctp_lport;
 		lsa6 = &lsa6_storage;
 #endif /* SCTP_EMBEDDED_V6_SCOPE */
 #endif /* SCOPEDROUTING */
 		ip6h->ip6_src = lsa6->sin6_addr;
 		if (port) {
 			if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
 				sctp_handle_no_route(stcb, net, so_locked);
 				SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
 				sctp_m_freem(m);
 				return (EHOSTUNREACH);
 			}
 			udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
 			udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
 			udp->uh_dport = port;
 			udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
 			udp->uh_sum = 0;
 			sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
 		} else {
 			sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
 		}
 		sctphdr->src_port = src_port;
 		sctphdr->dest_port = dest_port;
 		sctphdr->v_tag = v_tag;
 		sctphdr->checksum = 0;
 		/*
 		 * We set the hop limit now since there is a good chance
 		 * that our ro pointer is now filled
 		 */
 		ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
 #if !(defined(__Panda__) || defined(__Userspace__))
 		ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
 #endif
 #ifdef SCTP_DEBUG
 		/* Copy to be sure something bad is not happening */
 		sin6->sin6_addr = ip6h->ip6_dst;
 		lsa6->sin6_addr = ip6h->ip6_src;
 #endif
 		SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
 		SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
 		SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
 		SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
 		SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
 		if (net) {
 			sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 			/* preserve the port and scope for link local send */
 			prev_scope = sin6->sin6_scope_id;
 			prev_port = sin6->sin6_port;
 		}
 		if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
 			/* failed to prepend data, give up */
 			sctp_m_freem(m);
 			SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 			return (ENOMEM);
 		}
 		SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
 		if (port) {
 #if defined(SCTP_WITH_NO_CSUM)
 			SCTP_STAT_INCR(sctps_sendnocrc);
 #else
 			sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
 			SCTP_STAT_INCR(sctps_sendswcrc);
 #endif
 #if defined(__Windows__)
 			udp->uh_sum = 0;
 #elif !defined(__Userspace__)
 			if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
 				udp->uh_sum = 0xffff;
 			}
 #endif
 		} else {
 #if defined(SCTP_WITH_NO_CSUM)
 			SCTP_STAT_INCR(sctps_sendnocrc);
 #else
 #if defined(__FreeBSD__) && __FreeBSD_version >= 800000
 #if __FreeBSD_version < 900000
 			sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr));
 			SCTP_STAT_INCR(sctps_sendswcrc);
 #else
 #if __FreeBSD_version > 901000
 			m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
 #else
 			m->m_pkthdr.csum_flags = CSUM_SCTP;
 #endif
 			m->m_pkthdr.csum_data = 0;
 			SCTP_STAT_INCR(sctps_sendhwcrc);
 #endif
 #else
 			if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
 			      (stcb) && (stcb->asoc.scope.loopback_scope))) {
 				sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr));
 				SCTP_STAT_INCR(sctps_sendswcrc);
 			} else {
 				SCTP_STAT_INCR(sctps_sendnocrc);
 			}
 #endif
 #endif
 		}
 		/* send it out. table id is taken from stcb */
 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
 		if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
 			so = SCTP_INP_SO(inp);
 			SCTP_SOCKET_UNLOCK(so, 0);
 		}
 #endif
 #ifdef SCTP_PACKET_LOGGING
 		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
 			sctp_packet_log(o_pak);
 #endif
 #if !(defined(__Panda__) || defined(__Userspace__))
 		SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
 #else
 		SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, NULL, stcb, vrf_id);
 #endif
 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
 		if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
 			atomic_add_int(&stcb->asoc.refcnt, 1);
 			SCTP_TCB_UNLOCK(stcb);
 			SCTP_SOCKET_LOCK(so, 0);
 			SCTP_TCB_LOCK(stcb);
 			atomic_subtract_int(&stcb->asoc.refcnt, 1);
 		}
 #endif
 		if (net) {
 			/* for link local this must be done */
 			sin6->sin6_scope_id = prev_scope;
 			sin6->sin6_port = prev_port;
 		}
 		SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
 		SCTP_STAT_INCR(sctps_sendpackets);
 		SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
 		if (ret) {
 			SCTP_STAT_INCR(sctps_senderrors);
 		}
 		if (net == NULL) {
 			/* Now if we had a temp route free it */
 #if defined(__FreeBSD__) && __FreeBSD_version > 901000
 			RO_RTFREE(ro);
 #else
 			if (ro->ro_rt) {
 				RTFREE(ro->ro_rt);
 				ro->ro_rt = NULL;
 			}
 #endif
 		} else {
 			/* PMTU check versus smallest asoc MTU goes here */
 			if (ro->ro_rt == NULL) {
 				/* Route was freed */
 				if (net->ro._s_addr &&
 				    net->src_addr_selected) {
 					sctp_free_ifa(net->ro._s_addr);
 					net->ro._s_addr = NULL;
 				}
 				net->src_addr_selected = 0;
 			}
 			if ((ro->ro_rt != NULL) &&
 			    (net->ro._s_addr)) {
 				uint32_t mtu;
 				mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
 				if (mtu &&
 				    (stcb->asoc.smallest_mtu > mtu)) {
 					sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
 					net->mtu = mtu;
 					if (net->port) {
 						net->mtu -= sizeof(struct udphdr);
 					}
 				}
 			}
 #if !defined(__Panda__) && !defined(__Userspace__)
 			else if (ifp) {
 #if defined(__Windows__)
 #define ND_IFINFO(ifp)	(ifp)
 #define linkmtu		if_mtu
 #endif
 				if (ND_IFINFO(ifp)->linkmtu &&
 				    (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
 					sctp_mtu_size_reset(inp,
 					    &stcb->asoc,
 					    ND_IFINFO(ifp)->linkmtu);
 				}
 			}
 #endif
 		}
 		return (ret);
 	}
 #endif
 #if defined(__Userspace__)
 	case AF_CONN:
 	{
 		char *buffer;
 		struct sockaddr_conn *sconn;
 		int len;
 		sconn = (struct sockaddr_conn *)to;
 		len = sizeof(struct sctphdr);
 		newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
 		if (newm == NULL) {
 			sctp_m_freem(m);
 			SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 			return (ENOMEM);
 		}
 		SCTP_ALIGN_TO_END(newm, len);
 		SCTP_BUF_LEN(newm) = len;
 		SCTP_BUF_NEXT(newm) = m;
 		m = newm;
 		packet_length = sctp_calculate_len(m);
 		sctphdr = mtod(m, struct sctphdr *);
 		sctphdr->src_port = src_port;
 		sctphdr->dest_port = dest_port;
 		sctphdr->v_tag = v_tag;
 		sctphdr->checksum = 0;
 #if defined(SCTP_WITH_NO_CSUM)
 		SCTP_STAT_INCR(sctps_sendnocrc);
 #else
 		sctphdr->checksum = sctp_calculate_cksum(m, 0);
 		SCTP_STAT_INCR(sctps_sendswcrc);
 #endif
 		if (tos_value == 0) {
 			tos_value = inp->ip_inp.inp.inp_ip_tos;
 		}
 		tos_value &= 0xfc;
 		if (ecn_ok) {
 			tos_value |= sctp_get_ect(stcb);
 		}
 		/* Don't alloc/free for each packet */
 		if ((buffer = malloc(packet_length)) != NULL) {
 			m_copydata(m, 0, packet_length, buffer);
 			ret = SCTP_BASE_VAR(conn_output)(sconn->sconn_addr, buffer, packet_length, tos_value, nofragment_flag);
 			free(buffer);
 		} else {
 			ret = ENOMEM;
 		}
 		sctp_m_freem(m);
 		return (ret);
 	}
 #endif
 	default:
 		SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
 		        ((struct sockaddr *)to)->sa_family);
 		sctp_m_freem(m);
 		SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
 		return (EFAULT);
 	}
 }
 void
 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
 #endif
     )
 {
 	struct mbuf *m;
 	struct sctp_nets *net;
 	struct sctp_init_chunk *init;
 	struct sctp_supported_addr_param *sup_addr;
 	struct sctp_adaptation_layer_indication *ali;
 	struct sctp_supported_chunk_types_param *pr_supported;
 	struct sctp_paramhdr *ph;
 	int cnt_inits_to = 0;
 	int ret;
 	uint16_t num_ext, chunk_len, padding_len, parameter_len;
 #if defined(__APPLE__)
 	if (so_locked) {
 		sctp_lock_assert(SCTP_INP_SO(inp));
 	} else {
 		sctp_unlock_assert(SCTP_INP_SO(inp));
 	}
 #endif
 	/* INIT's always go to the primary (and usually ONLY address) */
 	net = stcb->asoc.primary_destination;
 	if (net == NULL) {
 		net = TAILQ_FIRST(&stcb->asoc.nets);
 		if (net == NULL) {
 			/* TSNH */
 			return;
 		}
 		/* we confirm any address we send an INIT to */
 		net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
 		(void)sctp_set_primary_addr(stcb, NULL, net);
 	} else {
 		/* we confirm any address we send an INIT to */
 		net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
 	}
 	SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
 #ifdef INET6
 	if (net->ro._l_addr.sa.sa_family == AF_INET6) {
 		/*
 		 * special hook, if we are sending to link local it will not
 		 * show up in our private address count.
 		 */
 		if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
 			cnt_inits_to = 1;
 	}
 #endif
 	if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
 		/* This case should not happen */
 		SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
 		return;
 	}
 	/* start the INIT timer */
 	sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
 	m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
 	if (m == NULL) {
 		/* No memory, INIT timer will re-attempt. */
 		SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
 		return;
 	}
 	chunk_len = (uint16_t)sizeof(struct sctp_init_chunk);
 	padding_len = 0;
 	/*
 	 * assume peer supports asconf in order to be able to queue
 	 * local address changes while an INIT is in flight and before
 	 * the assoc is established.
 	 */
 	stcb->asoc.peer_supports_asconf = 1;
 	/* Now lets put the chunk header in place */
 	init = mtod(m, struct sctp_init_chunk *);
 	/* now the chunk header */
 	init->ch.chunk_type = SCTP_INITIATION;
 	init->ch.chunk_flags = 0;
 	/* fill in later from mbuf we build */
 	init->ch.chunk_length = 0;
 	/* place in my tag */
 	init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
 	/* set up some of the credits. */
 	init->init.a_rwnd = htonl(max(inp->sctp_socket?SCTP_SB_LIMIT_RCV(inp->sctp_socket):0,
 	                              SCTP_MINIMAL_RWND));
 	init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
 	init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
 	init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
 	if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
 		uint8_t i;
 		parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
 		if (stcb->asoc.scope.ipv4_addr_legal) {
 			parameter_len += (uint16_t)sizeof(uint16_t);
 		}
 		if (stcb->asoc.scope.ipv6_addr_legal) {
 			parameter_len += (uint16_t)sizeof(uint16_t);
 		}
 		sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t) + chunk_len);
 		sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
 		sup_addr->ph.param_length = htons(parameter_len);
 		i = 0;
 		if (stcb->asoc.scope.ipv4_addr_legal) {
 			sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
 		}
 		if (stcb->asoc.scope.ipv6_addr_legal) {
 			sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
 		}
 		padding_len = 4 - 2 * i;
 		chunk_len += parameter_len;
 	}
 	/* Adaptation layer indication parameter */
 	if (inp->sctp_ep.adaptation_layer_indicator_provided) {
 		if (padding_len > 0) {
 			memset(mtod(m, caddr_t) + chunk_len, 0, padding_len);
 			chunk_len += padding_len;
 			padding_len = 0;
 		}
 		parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
 		ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t) + chunk_len);
 		ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
 		ali->ph.param_length = htons(parameter_len);
 		ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
 		chunk_len += parameter_len;
 	}
 	if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
 		/* Add NAT friendly parameter. */
 		if (padding_len > 0) {
 			memset(mtod(m, caddr_t) + chunk_len, 0, padding_len);
 			chunk_len += padding_len;
 			padding_len = 0;
 		}
 		parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
 		ph = (struct sctp_paramhdr *)(mtod(m, caddr_t) + chunk_len);
 		ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
 		ph->param_length = htons(parameter_len);
 		chunk_len += parameter_len;
 	}
 	/* now any cookie time extensions */
 	if (stcb->asoc.cookie_preserve_req) {
 		struct sctp_cookie_perserve_param *cookie_preserve;
 		if (padding_len > 0) {
 			memset(mtod(m, caddr_t) + chunk_len, 0, padding_len);
 			chunk_len += padding_len;
 			padding_len = 0;
 		}
 		parameter_len = (uint16_t)sizeof(struct sctp_cookie_perserve_param);
 		cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t) + chunk_len);
 		cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
 		cookie_preserve->ph.param_length = htons(parameter_len);
 		cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
 		stcb->asoc.cookie_preserve_req = 0;
 		chunk_len += parameter_len;
 	}
 	/* ECN parameter */
 	if (stcb->asoc.ecn_allowed == 1) {
 		if (padding_len > 0) {
 			memset(mtod(m, caddr_t) + chunk_len, 0, padding_len);
 			chunk_len += padding_len;
 			padding_len = 0;
 		}
 		parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
 		ph = (struct sctp_paramhdr *)(mtod(m, caddr_t) + chunk_len);
 		ph->param_type = htons(SCTP_ECN_CAPABLE);
 		ph->param_length = htons(parameter_len);
 		chunk_len += parameter_len;
 	}
 	/* And now tell the peer we do support PR-SCTP. */
 	if (padding_len > 0) {
 		memset(mtod(m, caddr_t) + chunk_len, 0, padding_len);
 		chunk_len += padding_len;
 		padding_len = 0;
 	}
 	parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
 	ph = (struct sctp_paramhdr *)(mtod(m, caddr_t) + chunk_len);
 	ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
 	ph->param_length = htons(parameter_len);
 	chunk_len += parameter_len;
 	/* And now tell the peer we do all the extensions */
 	pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t) + chunk_len);
 	pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
 	num_ext = 0;
 	pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
 	pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
 	pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
 	pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
 	pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
 	if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
 		pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
 	}
 	if (stcb->asoc.sctp_nr_sack_on_off == 1) {
 		pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
 	}
 	parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
 	pr_supported->ph.param_length = htons(parameter_len);
 	padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
 	chunk_len += parameter_len;
 	/* add authentication parameters */
 	if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
 		/* attach RANDOM parameter, if available */
 		if (stcb->asoc.authinfo.random != NULL) {
 			struct sctp_auth_random *randp;
 			if (padding_len > 0) {
 				memset(mtod(m, caddr_t) + chunk_len, 0, padding_len);
 				chunk_len += padding_len;
 				padding_len = 0;
 			}
 			randp = (struct sctp_auth_random *)(mtod(m, caddr_t) + chunk_len);
 			parameter_len = (uint16_t)sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
 			/* random key already contains the header */
 			memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
 			padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
 			chunk_len += parameter_len;
 		}
 		/* add HMAC_ALGO parameter */
 		if ((stcb->asoc.local_hmacs != NULL) &&
 		    (stcb->asoc.local_hmacs->num_algo > 0)) {
 			struct sctp_auth_hmac_algo *hmacs;
 			if (padding_len > 0) {
 				memset(mtod(m, caddr_t) + chunk_len, 0, padding_len);
 				chunk_len += padding_len;
 				padding_len = 0;
 			}
 			hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t) + chunk_len);
 			parameter_len = (uint16_t)(sizeof(struct sctp_auth_hmac_algo) +
 			                           stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
 			hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
 			hmacs->ph.param_length = htons(parameter_len);
 			sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *)hmacs->hmac_ids);
 			padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
 			chunk_len += parameter_len;
 		}
 		/* add CHUNKS parameter */
 		if (sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks) > 0) {
 			struct sctp_auth_chunk_list *chunks;
 			if (padding_len > 0) {
 				memset(mtod(m, caddr_t) + chunk_len, 0, padding_len);
 				chunk_len += padding_len;
 				padding_len = 0;
 			}
 			chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t) + chunk_len);
 			parameter_len = (uint16_t)(sizeof(struct sctp_auth_chunk_list) +
 			                           sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
 			chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
 			chunks->ph.param_length = htons(parameter_len);
 			sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
 			padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
 			chunk_len += parameter_len;
 		}
 	}
 	SCTP_BUF_LEN(m) = chunk_len;
 	/* now the addresses */
 	/* To optimize this we could put the scoping stuff
 	 * into a structure and remove the individual uint8's from
 	 * the assoc structure. Then we could just sifa in the
 	 * address within the stcb. But for now this is a quick
 	 * hack to get the address stuff teased apart.
 	 */
 	sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope, m, cnt_inits_to, &padding_len, &chunk_len);
 	init->ch.chunk_length = htons(chunk_len);
 	if (padding_len > 0) {
 		struct mbuf *m_at, *mp_last;
 		mp_last = NULL;
 		for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
 			if (SCTP_BUF_NEXT(m_at) == NULL)
 				mp_last = m_at;
 		}
 		if ((mp_last == NULL) || sctp_add_pad_tombuf(mp_last, padding_len)) {
 			sctp_m_freem(m);
 			return;
 		}
 	}
 	SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
 	ret = sctp_lowlevel_chunk_output(inp, stcb, net,
 	                                 (struct sockaddr *)&net->ro._l_addr,
 	                                 m, 0, NULL, 0, 0, 0, 0,
 	                                 inp->sctp_lport, stcb->rport, htonl(0),
 	                                 net->port, NULL,
 #if defined(__FreeBSD__)
 , 0,
 #endif
 	                                 so_locked);
 	SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
 	SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
 	(void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
 }
 struct mbuf *
 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
 	int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
 {
 	/*
 	 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
 	 * being equal to the beginning of the params i.e. (iphlen +
 	 * sizeof(struct sctp_init_msg) parse through the parameters to the
 	 * end of the mbuf verifying that all parameters are known.
 	 *
 	 * For unknown parameters build and return a mbuf with
 	 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
 	 * processing this chunk stop, and set *abort_processing to 1.
 	 *
 	 * By having param_offset be pre-set to where parameters begin it is
 	 * hoped that this routine may be reused in the future by new
 	 * features.
 	 */
 	struct sctp_paramhdr *phdr, params;
 	struct mbuf *mat, *op_err;
 	char tempbuf[SCTP_PARAM_BUFFER_SIZE];
 	int at, limit, pad_needed;
 	uint16_t ptype, plen, padded_size;
 	int err_at;
 	*abort_processing = 0;
 	mat = in_initpkt;
 	err_at = 0;
 	limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
 	at = param_offset;
 	op_err = NULL;
 	SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
 	phdr = sctp_get_next_param(mat, at, &params, sizeof(params));
 	while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
 		ptype = ntohs(phdr->param_type);
 		plen = ntohs(phdr->param_length);
 		if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
 			/* wacked parameter */
 			SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
 			goto invalid_size;
 		}
 		limit -= SCTP_SIZE32(plen);
 		/*-
 		 * All parameters for all chunks that we know/understand are
 		 * listed here. We process them other places and make
 		 * appropriate stop actions per the upper bits. However this
 		 * is the generic routine processor's can call to get back
 		 * an operr.. to either incorporate (init-ack) or send.
 		 */
 		padded_size = SCTP_SIZE32(plen);
 		switch (ptype) {
 			/* Param's with variable size */
 		case SCTP_HEARTBEAT_INFO:
 		case SCTP_STATE_COOKIE:
 		case SCTP_UNRECOG_PARAM:
 		case SCTP_ERROR_CAUSE_IND:
 			/* ok skip fwd */
 			at += padded_size;
 			break;
 			/* Param's with variable size within a range */
 		case SCTP_CHUNK_LIST:
 		case SCTP_SUPPORTED_CHUNK_EXT:
 			if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
 				goto invalid_size;
 			}
 			at += padded_size;
 			break;
 		case SCTP_SUPPORTED_ADDRTYPE:
 			if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
 				goto invalid_size;
 			}
 			at += padded_size;
 			break;
 		case SCTP_RANDOM:
 			if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
 				goto invalid_size;
 			}
 			at += padded_size;
 			break;
 		case SCTP_SET_PRIM_ADDR:
 		case SCTP_DEL_IP_ADDRESS:
 		case SCTP_ADD_IP_ADDRESS:
 			if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
 			    (padded_size != sizeof(struct sctp_asconf_addr_param))) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
 				goto invalid_size;
 			}
 			at += padded_size;
 			break;
 			/* Param's with a fixed size */
 		case SCTP_IPV4_ADDRESS:
 			if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
 				goto invalid_size;
 			}
 			at += padded_size;
 			break;
 		case SCTP_IPV6_ADDRESS:
 			if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
 				goto invalid_size;
 			}
 			at += padded_size;
 			break;
 		case SCTP_COOKIE_PRESERVE:
 			if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
 				goto invalid_size;
 			}
 			at += padded_size;
 			break;
 		case SCTP_HAS_NAT_SUPPORT:
 		  *nat_friendly = 1;
 		  /* fall through */
 		case SCTP_PRSCTP_SUPPORTED:
 			if (padded_size != sizeof(struct sctp_paramhdr)) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
 				goto invalid_size;
 			}
 			at += padded_size;
 			break;
 		case SCTP_ECN_CAPABLE:
 			if (padded_size != sizeof(struct sctp_ecn_supported_param)) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
 				goto invalid_size;
 			}
 			at += padded_size;
 			break;
 		case SCTP_ULP_ADAPTATION:
 			if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
 				goto invalid_size;
 			}
 			at += padded_size;
 			break;
 		case SCTP_SUCCESS_REPORT:
 			if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
 				goto invalid_size;
 			}
 			at += padded_size;
 			break;
 		case SCTP_HOSTNAME_ADDRESS:
 		{
 			/* We can NOT handle HOST NAME addresses!! */
 			int l_len;
 			SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
 			*abort_processing = 1;
 			if (op_err == NULL) {
 				/* Ok need to try to get a mbuf */
 #ifdef INET6
 				l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
 #else
 				l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
 #endif
 				l_len += plen;
 				l_len += sizeof(struct sctp_paramhdr);
 				op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
 				if (op_err) {
 					SCTP_BUF_LEN(op_err) = 0;
 					/*
 					 * pre-reserve space for ip and sctp
 					 * header  and chunk hdr
 					 */
 #ifdef INET6
 					SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
 #else
 					SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
 #endif
 					SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
 					SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
 				}
 			}
 			if (op_err) {
 				/* If we have space */
 				struct sctp_paramhdr s;
 				if (err_at % 4) {
 					uint32_t cpthis = 0;
 					pad_needed = 4 - (err_at % 4);
 					m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
 					err_at += pad_needed;
 				}
 				s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
 				s.param_length = htons(sizeof(s) + plen);
 				m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
 				err_at += sizeof(s);
 				phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf),plen));
 				if (phdr == NULL) {
 					sctp_m_freem(op_err);
 					/*
 					 * we are out of memory but we still
 					 * need to have a look at what to do
 					 * (the system is in trouble
 					 * though).
 					 */
 					return (NULL);
 				}
 				m_copyback(op_err, err_at, plen, (caddr_t)phdr);
 			}
 			return (op_err);
 			break;
 		}
 		default:
 			/*
 			 * we do not recognize the parameter figure out what
 			 * we do.
 			 */
 			SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
 			if ((ptype & 0x4000) == 0x4000) {
 				/* Report bit is set?? */
 				SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
 				if (op_err == NULL) {
 					int l_len;
 					/* Ok need to try to get an mbuf */
 #ifdef INET6
 					l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
 #else
 					l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
 #endif
 					l_len += plen;
 					l_len += sizeof(struct sctp_paramhdr);
 					op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
 					if (op_err) {
 						SCTP_BUF_LEN(op_err) = 0;
 #ifdef INET6
 						SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
 #else
 						SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
 #endif
 						SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
 						SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
 					}
 				}
 				if (op_err) {
 					/* If we have space */
 					struct sctp_paramhdr s;
 					if (err_at % 4) {
 						uint32_t cpthis = 0;
 						pad_needed = 4 - (err_at % 4);
 						m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
 						err_at += pad_needed;
 					}
 					s.param_type = htons(SCTP_UNRECOG_PARAM);
 					s.param_length = htons(sizeof(s) + plen);
 					m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
 					err_at += sizeof(s);
 					if (plen > sizeof(tempbuf)) {
 						plen = sizeof(tempbuf);
 					}
 					phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf),plen));
 					if (phdr == NULL) {
 						sctp_m_freem(op_err);
 						/*
 						 * we are out of memory but
 						 * we still need to have a
 						 * look at what to do (the
 						 * system is in trouble
 						 * though).
 						 */
 						op_err = NULL;
 						goto more_processing;
 					}
 					m_copyback(op_err, err_at, plen, (caddr_t)phdr);
 					err_at += plen;
 				}
 			}
 		more_processing:
 			if ((ptype & 0x8000) == 0x0000) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
 				return (op_err);
 			} else {
 				/* skip this chunk and continue processing */
 				SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
 				at += SCTP_SIZE32(plen);
 			}
 			break;
 		}
 		phdr = sctp_get_next_param(mat, at, &params, sizeof(params));
 	}
 	return (op_err);
  invalid_size:
 	SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
 	*abort_processing = 1;
 	if ((op_err == NULL) && phdr) {
 		int l_len;
 #ifdef INET6
 		l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
 #else
 		l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
 #endif
 		l_len += (2 * sizeof(struct sctp_paramhdr));
 		op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
         if (op_err) {
     		SCTP_BUF_LEN(op_err) = 0;
 #ifdef INET6
 	    	SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
 #else
 	    	SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
 #endif
 		SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
     		SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
         }
 	}
 	if ((op_err) && phdr) {
 		struct sctp_paramhdr s;
 		if (err_at % 4) {
 			uint32_t cpthis = 0;
 			pad_needed = 4 - (err_at % 4);
 			m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
 			err_at += pad_needed;
 		}
 		s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
 		s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
 		m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
 		err_at += sizeof(s);
 		/* Only copy back the p-hdr that caused the issue */
 		m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
 	}
 	return (op_err);
 }
 static int
 sctp_are_there_new_addresses(struct sctp_association *asoc,
     struct mbuf *in_initpkt, int offset, struct sockaddr *src)
 {
 	/*
 	 * Given a INIT packet, look through the packet to verify that there
 	 * are NO new addresses. As we go through the parameters add reports
 	 * of any un-understood parameters that require an error.  Also we
 	 * must return (1) to drop the packet if we see a un-understood
 	 * parameter that tells us to drop the chunk.
 	 */
 	struct sockaddr *sa_touse;
 	struct sockaddr *sa;
 	struct sctp_paramhdr *phdr, params;
 	uint16_t ptype, plen;
 	uint8_t fnd;
 	struct sctp_nets *net;
 #ifdef INET
 	struct sockaddr_in sin4, *sa4;
 #endif
 #ifdef INET6
 	struct sockaddr_in6 sin6, *sa6;
 #endif
 #ifdef INET
 	memset(&sin4, 0, sizeof(sin4));
 	sin4.sin_family = AF_INET;
 #ifdef HAVE_SIN_LEN
 	sin4.sin_len = sizeof(sin4);
 #endif
 #endif
 #ifdef INET6
 	memset(&sin6, 0, sizeof(sin6));
 	sin6.sin6_family = AF_INET6;
 #ifdef HAVE_SIN6_LEN
 	sin6.sin6_len = sizeof(sin6);
 #endif
 #endif
 	/* First what about the src address of the pkt ? */
 	fnd = 0;
 	TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
 		sa = (struct sockaddr *)&net->ro._l_addr;
 		if (sa->sa_family == src->sa_family) {
 #ifdef INET
 			if (sa->sa_family == AF_INET) {
 				struct sockaddr_in *src4;
 				sa4 = (struct sockaddr_in *)sa;
 				src4 = (struct sockaddr_in *)src;
 				if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
 					fnd = 1;
 					break;
 				}
 			}
 #endif
 #ifdef INET6
 			if (sa->sa_family == AF_INET6) {
 				struct sockaddr_in6 *src6;
 				sa6 = (struct sockaddr_in6 *)sa;
 				src6 = (struct sockaddr_in6 *)src;
 				if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
 					fnd = 1;
 					break;
 				}
 			}
 #endif
 		}
 	}
 	if (fnd == 0) {
 		/* New address added! no need to look futher. */
 		return (1);
 	}
 	/* Ok so far lets munge through the rest of the packet */
 	offset += sizeof(struct sctp_init_chunk);
 	phdr = sctp_get_next_param(in_initpkt, offset, &params, sizeof(params));
 	while (phdr) {
 		sa_touse = NULL;
 		ptype = ntohs(phdr->param_type);
 		plen = ntohs(phdr->param_length);
 		switch (ptype) {
 #ifdef INET
 		case SCTP_IPV4_ADDRESS:
 		{
 			struct sctp_ipv4addr_param *p4, p4_buf;
 			phdr = sctp_get_next_param(in_initpkt, offset,
 			    (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
 			if (plen != sizeof(struct sctp_ipv4addr_param) ||
 			    phdr == NULL) {
 				return (1);
 			}
 			p4 = (struct sctp_ipv4addr_param *)phdr;
 			sin4.sin_addr.s_addr = p4->addr;
 			sa_touse = (struct sockaddr *)&sin4;
 			break;
 		}
 #endif
 #ifdef INET6
 		case SCTP_IPV6_ADDRESS:
 		{
 			struct sctp_ipv6addr_param *p6, p6_buf;
 			phdr = sctp_get_next_param(in_initpkt, offset,
 			    (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
 			if (plen != sizeof(struct sctp_ipv6addr_param) ||
 			    phdr == NULL) {
 				return (1);
 			}
 			p6 = (struct sctp_ipv6addr_param *)phdr;
 			memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
 			    sizeof(p6->addr));
 			sa_touse = (struct sockaddr *)&sin6;
 			break;
 		}
 #endif
 		default:
 			sa_touse = NULL;
 			break;
 		}
 		if (sa_touse) {
 			/* ok, sa_touse points to one to check */
 			fnd = 0;
 			TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
 				sa = (struct sockaddr *)&net->ro._l_addr;
 				if (sa->sa_family != sa_touse->sa_family) {
 					continue;
 				}
 #ifdef INET
 				if (sa->sa_family == AF_INET) {
 					sa4 = (struct sockaddr_in *)sa;
 					if (sa4->sin_addr.s_addr ==
 					    sin4.sin_addr.s_addr) {
 						fnd = 1;
 						break;
 					}
 				}
 #endif
 #ifdef INET6
 				if (sa->sa_family == AF_INET6) {
 					sa6 = (struct sockaddr_in6 *)sa;
 					if (SCTP6_ARE_ADDR_EQUAL(
 					    sa6, &sin6)) {
 						fnd = 1;
 						break;
 					}
 				}
 #endif
 			}
 			if (!fnd) {
 				/* New addr added! no need to look further */
 				return (1);
 			}
 		}
 		offset += SCTP_SIZE32(plen);
 		phdr = sctp_get_next_param(in_initpkt, offset, &params, sizeof(params));
 	}
 	return (0);
 }
 /*
  * Given a MBUF chain that was sent into us containing an INIT. Build a
  * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
  * a pullup to include IPv6/4header, SCTP header and initial part of INIT
  * message (i.e. the struct sctp_init_msg).
  */
 void
 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
                        struct mbuf *init_pkt, int iphlen, int offset,
                        struct sockaddr *src, struct sockaddr *dst,
                        struct sctphdr *sh, struct sctp_init_chunk *init_chk,
 #if defined(__FreeBSD__)
 		       uint8_t use_mflowid, uint32_t mflowid,
 #endif
                        uint32_t vrf_id, uint16_t port, int hold_inp_lock)
 {
 	struct sctp_association *asoc;
 	struct mbuf *m, *m_at, *m_tmp, *m_cookie, *op_err, *mp_last;
 	struct sctp_init_ack_chunk *initack;
 	struct sctp_adaptation_layer_indication *ali;
 	struct sctp_ecn_supported_param *ecn;
 	struct sctp_prsctp_supported_param *prsctp;
 	struct sctp_supported_chunk_types_param *pr_supported;
 	union sctp_sockstore *over_addr;
 #ifdef INET
 	struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
 	struct sockaddr_in *src4 = (struct sockaddr_in *)src;
 	struct sockaddr_in *sin;
 #endif
 #ifdef INET6
 	struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
 	struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
 	struct sockaddr_in6 *sin6;
 #endif
 #if defined(__Userspace__)
 	struct sockaddr_conn *dstconn = (struct sockaddr_conn *)dst;
 	struct sockaddr_conn *srcconn = (struct sockaddr_conn *)src;
 	struct sockaddr_conn *sconn;
 #endif
 	struct sockaddr *to;
 	struct sctp_state_cookie stc;
 	struct sctp_nets *net = NULL;
 	uint8_t *signature = NULL;
 	int cnt_inits_to = 0;
 	uint16_t his_limit, i_want;
 	int abort_flag, padval;
 	int num_ext;
 	int p_len;
 	int nat_friendly = 0;
 	struct socket *so;
 	if (stcb) {
 		asoc = &stcb->asoc;
 	} else {
 		asoc = NULL;
 	}
 	mp_last = NULL;
 	if ((asoc != NULL) &&
 	    (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
 	    (sctp_are_there_new_addresses(asoc, init_pkt, offset, src))) {
 		/* new addresses, out of here in non-cookie-wait states */
 		/*
 		 * Send a ABORT, we don't add the new address error clause
 		 * though we even set the T bit and copy in the 0 tag.. this
 		 * looks no different than if no listener was present.
 		 */
 		sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, NULL,
 #if defined(__FreeBSD__)
 		                use_mflowid, mflowid,
 #endif
 		                vrf_id, port);
 		return;
 	}
 	abort_flag = 0;
 	op_err = sctp_arethere_unrecognized_parameters(init_pkt,
 						       (offset + sizeof(struct sctp_init_chunk)),
 						       &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
 	if (abort_flag) {
 	do_a_abort:
 		sctp_send_abort(init_pkt, iphlen, src, dst, sh,
 				init_chk->init.initiate_tag, op_err,
 #if defined(__FreeBSD__)
 		                use_mflowid, mflowid,
 #endif
 		                vrf_id, port);
 		return;
 	}
 	m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
 	if (m == NULL) {
 		/* No memory, INIT timer will re-attempt. */
 		if (op_err)
 			sctp_m_freem(op_err);
 		return;
 	}
 	SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
 	/*
 	 * We might not overwrite the identification[] completely and on
 	 * some platforms time_entered will contain some padding.
 	 * Therefore zero out the cookie to avoid putting
 	 * uninitialized memory on the wire.
 	 */
 	memset(&stc, 0, sizeof(struct sctp_state_cookie));
 	/* the time I built cookie */
 	(void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
 	/* populate any tie tags */
 	if (asoc != NULL) {
 		/* unlock before tag selections */
 		stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
 		stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
 		stc.cookie_life = asoc->cookie_life;
 		net = asoc->primary_destination;
 	} else {
 		stc.tie_tag_my_vtag = 0;
 		stc.tie_tag_peer_vtag = 0;
 		/* life I will award this cookie */
 		stc.cookie_life = inp->sctp_ep.def_cookie_life;
 	}
 	/* copy in the ports for later check */
 	stc.myport = sh->dest_port;
 	stc.peerport = sh->src_port;
 	/*
 	 * If we wanted to honor cookie life extentions, we would add to
 	 * stc.cookie_life. For now we should NOT honor any extension
 	 */
 	stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
 		stc.ipv6_addr_legal = 1;
 		if (SCTP_IPV6_V6ONLY(inp)) {
 			stc.ipv4_addr_legal = 0;
 		} else {
 			stc.ipv4_addr_legal = 1;
 		}
 #if defined(__Userspace__)
 		stc.conn_addr_legal = 0;
 #endif
 	} else {
 		stc.ipv6_addr_legal = 0;
 #if defined(__Userspace__)
 		if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_CONN) {
 			stc.conn_addr_legal = 1;
 			stc.ipv4_addr_legal = 0;
 		} else {
 			stc.conn_addr_legal = 0;
 			stc.ipv4_addr_legal = 1;
 		}
 #else
 		stc.ipv4_addr_legal = 1;
 #endif
 	}
 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
 	stc.ipv4_scope = 1;
 #else
 	stc.ipv4_scope = 0;
 #endif
 	if (net == NULL) {
 		to = src;
 		switch (dst->sa_family) {
 #ifdef INET
 		case AF_INET:
 		{
 			/* lookup address */
 			stc.address[0] = src4->sin_addr.s_addr;
 			stc.address[1] = 0;
 			stc.address[2] = 0;
 			stc.address[3] = 0;
 			stc.addr_type = SCTP_IPV4_ADDRESS;
 			/* local from address */
 			stc.laddress[0] = dst4->sin_addr.s_addr;
 			stc.laddress[1] = 0;
 			stc.laddress[2] = 0;
 			stc.laddress[3] = 0;
 			stc.laddr_type = SCTP_IPV4_ADDRESS;
 			/* scope_id is only for v6 */
 			stc.scope_id = 0;
 #ifndef SCTP_DONT_DO_PRIVADDR_SCOPE
 			if (IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) {
 				stc.ipv4_scope = 1;
 			}
 #else
 			stc.ipv4_scope = 1;
 #endif				/* SCTP_DONT_DO_PRIVADDR_SCOPE */
 			/* Must use the address in this case */
 			if (sctp_is_address_on_local_host(src, vrf_id)) {
 				stc.loopback_scope = 1;
 				stc.ipv4_scope = 1;
 				stc.site_scope = 1;
 				stc.local_scope = 0;
 			}
 			break;
 		}
 #endif
 #ifdef INET6
 		case AF_INET6:
 		{
 			stc.addr_type = SCTP_IPV6_ADDRESS;
 			memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
 #if defined(__FreeBSD__) && (((__FreeBSD_version < 900000) && (__FreeBSD_version >= 804000)) || (__FreeBSD_version > 900000))
 			stc.scope_id = in6_getscope(&src6->sin6_addr);
 #else
 			stc.scope_id = 0;
 #endif
 			if (sctp_is_address_on_local_host(src, vrf_id)) {
 				stc.loopback_scope = 1;
 				stc.local_scope = 0;
 				stc.site_scope = 1;
 				stc.ipv4_scope = 1;
 			} else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr)) {
 				/*
 				 * If the new destination is a LINK_LOCAL we
 				 * must have common both site and local
 				 * scope. Don't set local scope though since
 				 * we must depend on the source to be added
 				 * implicitly. We cannot assure just because
 				 * we share one link that all links are
 				 * common.
 				 */
 #if defined(__APPLE__)
 				/* Mac OS X currently doesn't have in6_getscope() */
 				stc.scope_id = src6->sin6_addr.s6_addr16[1];
 #endif
 				stc.local_scope = 0;
 				stc.site_scope = 1;
 				stc.ipv4_scope = 1;
 				/*
 				 * we start counting for the private address
 				 * stuff at 1. since the link local we
 				 * source from won't show up in our scoped
 				 * count.
 				 */
 				cnt_inits_to = 1;
 				/* pull out the scope_id from incoming pkt */
 			} else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr)) {
 				/*
 				 * If the new destination is SITE_LOCAL then
 				 * we must have site scope in common.
 				 */
 				stc.site_scope = 1;
 			}
 			memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
 			stc.laddr_type = SCTP_IPV6_ADDRESS;
 			break;
 		}
 #endif
 #if defined(__Userspace__)
 		case AF_CONN:
 		{
 			/* lookup address */
 			stc.address[0] = 0;
 			stc.address[1] = 0;
 			stc.address[2] = 0;
 			stc.address[3] = 0;
 			memcpy(&stc.address, &srcconn->sconn_addr, sizeof(void *));
 			stc.addr_type = SCTP_CONN_ADDRESS;
 			/* local from address */
 			stc.laddress[0] = 0;
 			stc.laddress[1] = 0;
 			stc.laddress[2] = 0;
 			stc.laddress[3] = 0;
 			memcpy(&stc.laddress, &dstconn->sconn_addr, sizeof(void *));
 			stc.laddr_type = SCTP_CONN_ADDRESS;
 			/* scope_id is only for v6 */
 			stc.scope_id = 0;
 			break;
 		}
 #endif
 		default:
 			/* TSNH */
 			goto do_a_abort;
 			break;
 		}
 	} else {
 		/* set the scope per the existing tcb */
 #ifdef INET6
 		struct sctp_nets *lnet;
 #endif
 		stc.loopback_scope = asoc->scope.loopback_scope;
 		stc.ipv4_scope = asoc->scope.ipv4_local_scope;
 		stc.site_scope = asoc->scope.site_scope;
 		stc.local_scope = asoc->scope.local_scope;
 #ifdef INET6
 		/* Why do we not consider IPv4 LL addresses? */
 		TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
 			if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
 				if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
 					/*
 					 * if we have a LL address, start
 					 * counting at 1.
 					 */
 					cnt_inits_to = 1;
 				}
 			}
 		}
 #endif
 		/* use the net pointer */
 		to = (struct sockaddr *)&net->ro._l_addr;
 		switch (to->sa_family) {
 #ifdef INET
 		case AF_INET:
 			sin = (struct sockaddr_in *)to;
 			stc.address[0] = sin->sin_addr.s_addr;
 			stc.address[1] = 0;
 			stc.address[2] = 0;
 			stc.address[3] = 0;
 			stc.addr_type = SCTP_IPV4_ADDRESS;
 			if (net->src_addr_selected == 0) {
 				/*
 				 * strange case here, the INIT should have
 				 * did the selection.
 				 */
 				net->ro._s_addr = sctp_source_address_selection(inp,
 										stcb, (sctp_route_t *)&net->ro,
 										net, 0, vrf_id);
 				if (net->ro._s_addr == NULL)
 					return;
 				net->src_addr_selected = 1;
 			}
 			stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
 			stc.laddress[1] = 0;
 			stc.laddress[2] = 0;
 			stc.laddress[3] = 0;
 			stc.laddr_type = SCTP_IPV4_ADDRESS;
 			/* scope_id is only for v6 */
 			stc.scope_id = 0;
 			break;
 #endif
 #ifdef INET6
 		case AF_INET6:
 			sin6 = (struct sockaddr_in6 *)to;
 			memcpy(&stc.address, &sin6->sin6_addr,
 			       sizeof(struct in6_addr));
 			stc.addr_type = SCTP_IPV6_ADDRESS;
 			stc.scope_id = sin6->sin6_scope_id;
 			if (net->src_addr_selected == 0) {
 				/*
 				 * strange case here, the INIT should have
 				 * done the selection.
 				 */
 				net->ro._s_addr = sctp_source_address_selection(inp,
 										stcb, (sctp_route_t *)&net->ro,
 										net, 0, vrf_id);
 				if (net->ro._s_addr == NULL)
 					return;
 				net->src_addr_selected = 1;
 			}
 			memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
 			       sizeof(struct in6_addr));
 			stc.laddr_type = SCTP_IPV6_ADDRESS;
 			break;
 #endif
 #if defined(__Userspace__)
 		case AF_CONN:
 			sconn = (struct sockaddr_conn *)to;
 			stc.address[0] = 0;
 			stc.address[1] = 0;
 			stc.address[2] = 0;
 			stc.address[3] = 0;
 			memcpy(&stc.address, &sconn->sconn_addr, sizeof(void *));
 			stc.addr_type = SCTP_CONN_ADDRESS;
 			stc.laddress[0] = 0;
 			stc.laddress[1] = 0;
 			stc.laddress[2] = 0;
 			stc.laddress[3] = 0;
 			memcpy(&stc.laddress, &sconn->sconn_addr, sizeof(void *));
 			stc.laddr_type = SCTP_CONN_ADDRESS;
 			stc.scope_id = 0;
 			break;
 #endif
 		}
 	}
 	/* Now lets put the SCTP header in place */
 	initack = mtod(m, struct sctp_init_ack_chunk *);
 	/* Save it off for quick ref */
 	stc.peers_vtag = init_chk->init.initiate_tag;
 	/* who are we */
 	memcpy(stc.identification, SCTP_VERSION_STRING,
 	       min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
 	memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
 	/* now the chunk header */
 	initack->ch.chunk_type = SCTP_INITIATION_ACK;
 	initack->ch.chunk_flags = 0;
 	/* fill in later from mbuf we build */
 	initack->ch.chunk_length = 0;
 	/* place in my tag */
 	if ((asoc != NULL) &&
 	    ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
 	     (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
 	     (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
 		/* re-use the v-tags and init-seq here */
 		initack->init.initiate_tag = htonl(asoc->my_vtag);
 		initack->init.initial_tsn = htonl(asoc->init_seq_number);
 	} else {
 		uint32_t vtag, itsn;
 		if (hold_inp_lock) {
 			SCTP_INP_INCR_REF(inp);
 			SCTP_INP_RUNLOCK(inp);
 		}
 		if (asoc) {
 			atomic_add_int(&asoc->refcnt, 1);
 			SCTP_TCB_UNLOCK(stcb);
 		new_tag:
 			vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
 			if ((asoc->peer_supports_nat)  && (vtag == asoc->my_vtag)) {
 				/* Got a duplicate vtag on some guy behind a nat
 				 * make sure we don't use it.
 				 */
 				goto new_tag;
 			}
 			initack->init.initiate_tag = htonl(vtag);
 			/* get a TSN to use too */
 			itsn = sctp_select_initial_TSN(&inp->sctp_ep);
 			initack->init.initial_tsn = htonl(itsn);
 			SCTP_TCB_LOCK(stcb);
 			atomic_add_int(&asoc->refcnt, -1);
 		} else {
 			vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
 			initack->init.initiate_tag = htonl(vtag);
 			/* get a TSN to use too */
 			initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
 		}
 		if (hold_inp_lock) {
 			SCTP_INP_RLOCK(inp);
 			SCTP_INP_DECR_REF(inp);
 		}
 	}
 	/* save away my tag to */
 	stc.my_vtag = initack->init.initiate_tag;
 	/* set up some of the credits. */
 	so = inp->sctp_socket;
 	if (so == NULL) {
 		/* memory problem */
 		sctp_m_freem(m);
 		return;
 	} else {
 		initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
 	}
 	/* set what I want */
 	his_limit = ntohs(init_chk->init.num_inbound_streams);
 	/* choose what I want */
 	if (asoc != NULL) {
 		if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) {
 			i_want = asoc->streamoutcnt;
 		} else {
 			i_want = inp->sctp_ep.pre_open_stream_count;
 		}
 	} else {
 		i_want = inp->sctp_ep.pre_open_stream_count;
 	}
 	if (his_limit < i_want) {
 		/* I Want more :< */
 		initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
 	} else {
 		/* I can have what I want :> */
 		initack->init.num_outbound_streams = htons(i_want);
 	}
 	/* tell him his limit. */
 	initack->init.num_inbound_streams =
 		htons(inp->sctp_ep.max_open_streams_intome);
 	/* adaptation layer indication parameter */
 	if (inp->sctp_ep.adaptation_layer_indicator_provided) {
 		ali = (struct sctp_adaptation_layer_indication *)((caddr_t)initack + sizeof(*initack));
 		ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
 		ali->ph.param_length = htons(sizeof(*ali));
 		ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
 		SCTP_BUF_LEN(m) += sizeof(*ali);
 		ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
 	} else {
 		ecn = (struct sctp_ecn_supported_param *)((caddr_t)initack + sizeof(*initack));
 	}
 	/* ECN parameter */
 	if (((asoc != NULL) && (asoc->ecn_allowed == 1)) ||
 	    (inp->sctp_ecn_enable == 1)) {
 		ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
 		ecn->ph.param_length = htons(sizeof(*ecn));
 		SCTP_BUF_LEN(m) += sizeof(*ecn);
 		prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
 								sizeof(*ecn));
 	} else {
 		prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
 	}
 	/* And now tell the peer we do  pr-sctp */
 	prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
 	prsctp->ph.param_length = htons(sizeof(*prsctp));
 	SCTP_BUF_LEN(m) += sizeof(*prsctp);
 	if (nat_friendly) {
 		/* Add NAT friendly parameter */
 		struct sctp_paramhdr *ph;
 		ph = (struct sctp_paramhdr *)(mtod(m, caddr_t) + SCTP_BUF_LEN(m));
 		ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
 		ph->param_length = htons(sizeof(struct sctp_paramhdr));
 		SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
 	}
 	/* And now tell the peer we do all the extensions */
 	pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t) + SCTP_BUF_LEN(m));
 	pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
 	num_ext = 0;
 	pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
 	pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
 	pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
 	pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
 	pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
 	if (!SCTP_BASE_SYSCTL(sctp_auth_disable))
 		pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
 	if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off))
 		pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
 	p_len = sizeof(*pr_supported) + num_ext;
 	pr_supported->ph.param_length = htons(p_len);
 	bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
 	SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
 	/* add authentication parameters */
 	if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
 		struct sctp_auth_random *randp;
 		struct sctp_auth_hmac_algo *hmacs;
 		struct sctp_auth_chunk_list *chunks;
 		uint16_t random_len;
 		/* generate and add RANDOM parameter */
 		random_len = SCTP_AUTH_RANDOM_SIZE_DEFAULT;
 		randp = (struct sctp_auth_random *)(mtod(m, caddr_t) + SCTP_BUF_LEN(m));
 		randp->ph.param_type = htons(SCTP_RANDOM);
 		p_len = sizeof(*randp) + random_len;
 		randp->ph.param_length = htons(p_len);
 		SCTP_READ_RANDOM(randp->random_data, random_len);
 		/* zero out any padding required */
 		bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
 		SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
 		/* add HMAC_ALGO parameter */
 		hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t) + SCTP_BUF_LEN(m));
 		p_len = sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
 						(uint8_t *) hmacs->hmac_ids);
 		if (p_len > 0) {
 			p_len += sizeof(*hmacs);
 			hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
 			hmacs->ph.param_length = htons(p_len);
 			/* zero out any padding required */
 			bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
 			SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
 		}
 		/* add CHUNKS parameter */
 		chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t) + SCTP_BUF_LEN(m));
 		p_len = sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
 						   chunks->chunk_types);
 		if (p_len > 0) {
 			p_len += sizeof(*chunks);
 			chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
 			chunks->ph.param_length = htons(p_len);
 			/* zero out any padding required */
 			bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
 			SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
 		}
 	}
 	m_at = m;
 	/* now the addresses */
 	{
 		struct sctp_scoping scp;
 		/* To optimize this we could put the scoping stuff
 		 * into a structure and remove the individual uint8's from
 		 * the stc structure. Then we could just sifa in the
 		 * address within the stc.. but for now this is a quick
 		 * hack to get the address stuff teased apart.
 		 */
  		scp.ipv4_addr_legal = stc.ipv4_addr_legal;
 		scp.ipv6_addr_legal = stc.ipv6_addr_legal;
 #if defined(__Userspace__)
 		scp.conn_addr_legal = stc.conn_addr_legal;
 #endif
 		scp.loopback_scope = stc.loopback_scope;
 		scp.ipv4_local_scope = stc.ipv4_scope;
 		scp.local_scope = stc.local_scope;
 		scp.site_scope = stc.site_scope;
 		m_at = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_at, cnt_inits_to, NULL, NULL);
 	}
 	/* tack on the operational error if present */
 	if (op_err) {
 		struct mbuf *ol;
 		int llen;
 		llen = 0;
 		ol = op_err;
 		while (ol) {
 			llen += SCTP_BUF_LEN(ol);
 			ol = SCTP_BUF_NEXT(ol);
 		}
 		if (llen % 4) {
 			/* must add a pad to the param */
 			uint32_t cpthis = 0;
 			int padlen;
 			padlen = 4 - (llen % 4);
 			m_copyback(op_err, llen, padlen, (caddr_t)&cpthis);
 		}
 		while (SCTP_BUF_NEXT(m_at) != NULL) {
 			m_at = SCTP_BUF_NEXT(m_at);
 		}
 		SCTP_BUF_NEXT(m_at) = op_err;
 		while (SCTP_BUF_NEXT(m_at) != NULL) {
 			m_at = SCTP_BUF_NEXT(m_at);
 		}
 	}
 	/* pre-calulate the size and update pkt header and chunk header */
 	p_len = 0;
 	for (m_tmp = m; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
 		p_len += SCTP_BUF_LEN(m_tmp);
 		if (SCTP_BUF_NEXT(m_tmp) == NULL) {
 			/* m_tmp should now point to last one */
 			break;
 		}
 	}
 	/* Now we must build a cookie */
 	m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
 	if (m_cookie == NULL) {
 		/* memory problem */
 		sctp_m_freem(m);
 		return;
 	}
 	/* Now append the cookie to the end and update the space/size */
 	SCTP_BUF_NEXT(m_tmp) = m_cookie;
 	for (m_tmp = m_cookie; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
 		p_len += SCTP_BUF_LEN(m_tmp);
 		if (SCTP_BUF_NEXT(m_tmp) == NULL) {
 			/* m_tmp should now point to last one */
 			mp_last = m_tmp;
 			break;
 		}
 	}
 	/* Place in the size, but we don't include
 	 * the last pad (if any) in the INIT-ACK.
 	 */
 	initack->ch.chunk_length = htons(p_len);
 	/* Time to sign the cookie, we don't sign over the cookie
 	 * signature though thus we set trailer.
 	 */
 	(void)sctp_hmac_m(SCTP_HMAC,
 			  (uint8_t *)inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
 			  SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
 			  (uint8_t *)signature, SCTP_SIGNATURE_SIZE);
 	/*
 	 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
 	 * here since the timer will drive a retranmission.
 	 */
 	padval = p_len % 4;
 	if ((padval) && (mp_last)) {
 		/* see my previous comments on mp_last */
 		if (sctp_add_pad_tombuf(mp_last, (4 - padval))) {
 			/* Houston we have a problem, no space */
 			sctp_m_freem(m);
 			return;
 		}
 	}
 	if (stc.loopback_scope) {
 		over_addr = (union sctp_sockstore *)dst;
 	} else {
 		over_addr = NULL;
 	}
 	(void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
 , 0,
 	                                 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
 	                                 port, over_addr,
 #if defined(__FreeBSD__)
 	                                 use_mflowid, mflowid,
 #endif
 	                                 SCTP_SO_NOT_LOCKED);
 	SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
 }
 static void
 sctp_prune_prsctp(struct sctp_tcb *stcb,
     struct sctp_association *asoc,
     struct sctp_sndrcvinfo *srcv,
     int dataout)
 {
 	int freed_spc = 0;
 	struct sctp_tmit_chunk *chk, *nchk;
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	if ((asoc->peer_supports_prsctp) &&
 	    (asoc->sent_queue_cnt_removeable > 0)) {
 		TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
 			/*
 			 * Look for chunks marked with the PR_SCTP flag AND
 			 * the buffer space flag. If the one being sent is
 			 * equal or greater priority then purge the old one
 			 * and free some space.
 			 */
 			if (PR_SCTP_BUF_ENABLED(chk->flags)) {
 				/*
 				 * This one is PR-SCTP AND buffer space
 				 * limited type
 				 */
 				if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
 					/*
 					 * Lower numbers equates to higher
 					 * priority so if the one we are
 					 * looking at has a larger or equal
 					 * priority we want to drop the data
 					 * and NOT retransmit it.
 					 */
 					if (chk->data) {
 						/*
 						 * We release the book_size
 						 * if the mbuf is here
 						 */
 						int ret_spc;
 						uint8_t sent;
 						if (chk->sent > SCTP_DATAGRAM_UNSENT)
 							sent = 1;
 						else
 							sent = 0;
 						ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
 						    sent,
 						    SCTP_SO_LOCKED);
 						freed_spc += ret_spc;
 						if (freed_spc >= dataout) {
 							return;
 						}
 					}	/* if chunk was present */
 				}	/* if of sufficent priority */
 			}	/* if chunk has enabled */
 		}		/* tailqforeach */
 		TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
 			/* Here we must move to the sent queue and mark */
 			if (PR_SCTP_BUF_ENABLED(chk->flags)) {
 				if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
 					if (chk->data) {
 						/*
 						 * We release the book_size
 						 * if the mbuf is here
 						 */
 						int ret_spc;
 						ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
 , SCTP_SO_LOCKED);
 						freed_spc += ret_spc;
 						if (freed_spc >= dataout) {
 							return;
 						}
 					}	/* end if chk->data */
 				}	/* end if right class */
 			}	/* end if chk pr-sctp */
 		}		/* tailqforeachsafe (chk) */
 	}			/* if enabled in asoc */
 }
 int
 sctp_get_frag_point(struct sctp_tcb *stcb,
     struct sctp_association *asoc)
 {
 	int siz, ovh;
 	/*
 	 * For endpoints that have both v6 and v4 addresses we must reserve
 	 * room for the ipv6 header, for those that are only dealing with V4
 	 * we use a larger frag point.
 	 */
 	if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
 		ovh = SCTP_MED_OVERHEAD;
 	} else {
 		ovh = SCTP_MED_V4_OVERHEAD;
 	}
 	if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
 		siz = asoc->smallest_mtu - ovh;
 	else
 		siz = (stcb->asoc.sctp_frag_point - ovh);
 	/*
 	 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
 	 */
 	/* A data chunk MUST fit in a cluster */
 	/* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
 	/* } */
 	/* adjust for an AUTH chunk if DATA requires auth */
 	if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
 		siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
 	if (siz % 4) {
 		/* make it an even word boundary please */
 		siz -= (siz % 4);
 	}
 	return (siz);
 }
 static void
 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
 {
 	/*
 	 * We assume that the user wants PR_SCTP_TTL if the user
 	 * provides a positive lifetime but does not specify any
 	 * PR_SCTP policy.
 	 */
 	if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
 		sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
 	} else if (sp->timetolive > 0) {
 		sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
 		sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
 	} else {
 		return;
 	}
 	switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
 	case CHUNK_FLAGS_PR_SCTP_BUF:
 		/*
 		 * Time to live is a priority stored in tv_sec when
 		 * doing the buffer drop thing.
 		 */
 		sp->ts.tv_sec = sp->timetolive;
 		sp->ts.tv_usec = 0;
 		break;
 	case CHUNK_FLAGS_PR_SCTP_TTL:
 	{
 		struct timeval tv;
 		(void)SCTP_GETTIME_TIMEVAL(&sp->ts);
 		tv.tv_sec = sp->timetolive / 1000;
 		tv.tv_usec = (sp->timetolive * 1000) % 1000000;
 		/* TODO sctp_constants.h needs alternative time macros when
 		 *  _KERNEL is undefined.
 		 */
 #ifndef __FreeBSD__
 		timeradd(&sp->ts, &tv, &sp->ts);
 #else
 		timevaladd(&sp->ts, &tv);
 #endif
 	}
 		break;
 	case CHUNK_FLAGS_PR_SCTP_RTX:
 		/*
 		 * Time to live is a the number or retransmissions
 		 * stored in tv_sec.
 		 */
 		sp->ts.tv_sec = sp->timetolive;
 		sp->ts.tv_usec = 0;
 		break;
 	default:
 		SCTPDBG(SCTP_DEBUG_USRREQ1,
 			"Unknown PR_SCTP policy %u.\n",
 			PR_SCTP_POLICY(sp->sinfo_flags));
 		break;
 	}
 }
 static int
 sctp_msg_append(struct sctp_tcb *stcb,
 		struct sctp_nets *net,
 		struct mbuf *m,
 		struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
 {
 	int error = 0;
 	struct mbuf *at;
 	struct sctp_stream_queue_pending *sp = NULL;
 	struct sctp_stream_out *strm;
 	/* Given an mbuf chain, put it
 	 * into the association send queue and
 	 * place it on the wheel
 	 */
 	if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
 		/* Invalid stream number */
 		SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 		error = EINVAL;
 		goto out_now;
 	}
 	if ((stcb->asoc.stream_locked) &&
 	    (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
 		SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 		error = EINVAL;
 		goto out_now;
 	}
 	strm = &stcb->asoc.strmout[srcv->sinfo_stream];
 	/* Now can we send this? */
 	if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
 	    (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
 	    (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
 	    (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
 		/* got data while shutting down */
 		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
 		error = ECONNRESET;
 		goto out_now;
 	}
 	sctp_alloc_a_strmoq(stcb, sp);
 	if (sp == NULL) {
 		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 		error = ENOMEM;
 		goto out_now;
 	}
 	sp->sinfo_flags = srcv->sinfo_flags;
 	sp->timetolive = srcv->sinfo_timetolive;
 	sp->ppid = srcv->sinfo_ppid;
 	sp->context = srcv->sinfo_context;
 	if (sp->sinfo_flags & SCTP_ADDR_OVER) {
 		sp->net = net;
 		atomic_add_int(&sp->net->ref_count, 1);
 	} else {
 		sp->net = NULL;
 	}
 	(void)SCTP_GETTIME_TIMEVAL(&sp->ts);
 	sp->stream = srcv->sinfo_stream;
 	sp->msg_is_complete = 1;
 	sp->sender_all_done = 1;
 	sp->some_taken = 0;
 	sp->data = m;
 	sp->tail_mbuf = NULL;
 	sctp_set_prsctp_policy(sp);
 	/* We could in theory (for sendall) sifa the length
 	 * in, but we would still have to hunt through the
 	 * chain since we need to setup the tail_mbuf
 	 */
 	sp->length = 0;
 	for (at = m; at; at = SCTP_BUF_NEXT(at)) {
 		if (SCTP_BUF_NEXT(at) == NULL)
 			sp->tail_mbuf = at;
 		sp->length += SCTP_BUF_LEN(at);
 	}
 	if (srcv->sinfo_keynumber_valid) {
 		sp->auth_keyid = srcv->sinfo_keynumber;
 	} else {
 		sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
 	}
 	if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
 		sctp_auth_key_acquire(stcb, sp->auth_keyid);
 		sp->holds_key_ref = 1;
 	}
 	if (hold_stcb_lock == 0) {
 		SCTP_TCB_SEND_LOCK(stcb);
 	}
 	sctp_snd_sb_alloc(stcb, sp->length);
 	atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
 	TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
 	stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
 	m = NULL;
 	if (hold_stcb_lock == 0) {
 		SCTP_TCB_SEND_UNLOCK(stcb);
 	}
 out_now:
 	if (m) {
 		sctp_m_freem(m);
 	}
 	return (error);
 }
 static struct mbuf *
 sctp_copy_mbufchain(struct mbuf *clonechain,
 		    struct mbuf *outchain,
 		    struct mbuf **endofchain,
 		    int can_take_mbuf,
 		    int sizeofcpy,
 		    uint8_t copy_by_ref)
 {
 	struct mbuf *m;
 	struct mbuf *appendchain;
 	caddr_t cp;
 	int len;
 	if (endofchain == NULL) {
 		/* error */
 	error_out:
 		if (outchain)
 			sctp_m_freem(outchain);
 		return (NULL);
 	}
 	if (can_take_mbuf) {
 		appendchain = clonechain;
 	} else {
 		if (!copy_by_ref &&
 #if defined(__Panda__)
 
 #else
 		    (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
 #endif
 		    ) {
 			/* Its not in a cluster */
 			if (*endofchain == NULL) {
 				/* lets get a mbuf cluster */
 				if (outchain == NULL) {
 					/* This is the general case */
 				new_mbuf:
 					outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
 					if (outchain == NULL) {
 						goto error_out;
 					}
 					SCTP_BUF_LEN(outchain) = 0;
 					*endofchain = outchain;
 					/* get the prepend space */
 					SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV+4));
 				} else {
 					/* We really should not get a NULL in endofchain */
 					/* find end */
 					m = outchain;
 					while (m) {
 						if (SCTP_BUF_NEXT(m) == NULL) {
 							*endofchain = m;
 							break;
 						}
 						m = SCTP_BUF_NEXT(m);
 					}
 					/* sanity */
 					if (*endofchain == NULL) {
 						/* huh, TSNH XXX maybe we should panic */
 						sctp_m_freem(outchain);
 						goto new_mbuf;
 					}
 				}
 				/* get the new end of length */
 				len = M_TRAILINGSPACE(*endofchain);
 			} else {
 				/* how much is left at the end? */
 				len = M_TRAILINGSPACE(*endofchain);
 			}
 			/* Find the end of the data, for appending */
 			cp = (mtod((*endofchain), caddr_t) + SCTP_BUF_LEN((*endofchain)));
 			/* Now lets copy it out */
 			if (len >= sizeofcpy) {
 				/* It all fits, copy it in */
 				m_copydata(clonechain, 0, sizeofcpy, cp);
 				SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
 			} else {
 				/* fill up the end of the chain */
 				if (len > 0) {
 					m_copydata(clonechain, 0, len, cp);
 					SCTP_BUF_LEN((*endofchain)) += len;
 					/* now we need another one */
 					sizeofcpy -= len;
 				}
 				m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
 				if (m == NULL) {
 					/* We failed */
 					goto error_out;
 				}
 				SCTP_BUF_NEXT((*endofchain)) = m;
 				*endofchain = m;
 				cp = mtod((*endofchain), caddr_t);
 				m_copydata(clonechain, len, sizeofcpy, cp);
 				SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
 			}
 			return (outchain);
 		} else {
 			/* copy the old fashion way */
 			appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
 #ifdef SCTP_MBUF_LOGGING
 			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
 				struct mbuf *mat;
 				for (mat = appendchain; mat; mat = SCTP_BUF_NEXT(mat)) {
 					if (SCTP_BUF_IS_EXTENDED(mat)) {
 						sctp_log_mb(mat, SCTP_MBUF_ICOPY);
 					}
 				}
 			}
 #endif
 		}
 	}
 	if (appendchain == NULL) {
 		/* error */
 		if (outchain)
 			sctp_m_freem(outchain);
 		return (NULL);
 	}
 	if (outchain) {
 		/* tack on to the end */
 		if (*endofchain != NULL) {
 			SCTP_BUF_NEXT(((*endofchain))) = appendchain;
 		} else {
 			m = outchain;
 			while (m) {
 				if (SCTP_BUF_NEXT(m) == NULL) {
 					SCTP_BUF_NEXT(m) = appendchain;
 					break;
 				}
 				m = SCTP_BUF_NEXT(m);
 			}
 		}
 		/*
 		 * save off the end and update the end-chain
 		 * postion
 		 */
 		m = appendchain;
 		while (m) {
 			if (SCTP_BUF_NEXT(m) == NULL) {
 				*endofchain = m;
 				break;
 			}
 			m = SCTP_BUF_NEXT(m);
 		}
 		return (outchain);
 	} else {
 		/* save off the end and update the end-chain postion */
 		m = appendchain;
 		while (m) {
 			if (SCTP_BUF_NEXT(m) == NULL) {
 				*endofchain = m;
 				break;
 			}
 			m = SCTP_BUF_NEXT(m);
 		}
 		return (appendchain);
 	}
 }
 static int
 sctp_med_chunk_output(struct sctp_inpcb *inp,
 		      struct sctp_tcb *stcb,
 		      struct sctp_association *asoc,
 		      int *num_out,
 		      int *reason_code,
 		      int control_only, int from_where,
 		      struct timeval *now, int *now_filled, int frag_point, int so_locked
 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
 		      SCTP_UNUSED
 #endif
                       );
 static void
 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
     uint32_t val SCTP_UNUSED)
 {
 	struct sctp_copy_all *ca;
 	struct mbuf *m;
 	int ret = 0;
 	int added_control = 0;
 	int un_sent, do_chunk_output = 1;
 	struct sctp_association *asoc;
 	struct sctp_nets *net;
 	ca = (struct sctp_copy_all *)ptr;
 	if (ca->m == NULL) {
 		return;
 	}
 	if (ca->inp != inp) {
 		/* TSNH */
 		return;
 	}
 	if (ca->sndlen > 0) {
 		m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
 		if (m == NULL) {
 			/* can't copy so we are done */
 			ca->cnt_failed++;
 			return;
 		}
 #ifdef SCTP_MBUF_LOGGING
 		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
 			struct mbuf *mat;
 			for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
 				if (SCTP_BUF_IS_EXTENDED(mat)) {
 					sctp_log_mb(mat, SCTP_MBUF_ICOPY);
 				}
 			}
 		}
 #endif
 	} else {
 		m = NULL;
 	}
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	if (stcb->asoc.alternate) {
 		net = stcb->asoc.alternate;
 	} else {
 		net = stcb->asoc.primary_destination;
 	}
 	if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
 		/* Abort this assoc with m as the user defined reason */
 		if (m != NULL) {
 			SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
 		} else {
 			m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
 , M_NOWAIT, 1, MT_DATA);
 			SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
 		}
 		if (m != NULL) {
 			struct sctp_paramhdr *ph;
 			ph = mtod(m, struct sctp_paramhdr *);
 			ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
 			ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen);
 		}
 		/* We add one here to keep the assoc from
 		 * dis-appearing on us.
 		 */
 		atomic_add_int(&stcb->asoc.refcnt, 1);
 		sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
 		/* sctp_abort_an_association calls sctp_free_asoc()
 		 * free association will NOT free it since we
 		 * incremented the refcnt .. we do this to prevent
 		 * it being freed and things getting tricky since
 		 * we could end up (from free_asoc) calling inpcb_free
 		 * which would get a recursive lock call to the
 		 * iterator lock.. But as a consequence of that the
 		 * stcb will return to us un-locked.. since free_asoc
 		 * returns with either no TCB or the TCB unlocked, we
 		 * must relock.. to unlock in the iterator timer :-0
 		 */
 		SCTP_TCB_LOCK(stcb);
 		atomic_add_int(&stcb->asoc.refcnt, -1);
 		goto no_chunk_output;
 	} else {
 		if (m) {
 			ret = sctp_msg_append(stcb, net, m,
 					      &ca->sndrcv, 1);
 		}
 		asoc = &stcb->asoc;
 		if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
 			/* shutdown this assoc */
 			int cnt;
 			cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
 			if (TAILQ_EMPTY(&asoc->send_queue) &&
 			    TAILQ_EMPTY(&asoc->sent_queue) &&
 			    (cnt == 0)) {
 				if (asoc->locked_on_sending) {
 					goto abort_anyway;
 				}
 				/* there is nothing queued to send, so I'm done... */
 				if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
 				    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
 				    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
 					/* only send SHUTDOWN the first time through */
 					if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
 						SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 					}
 					SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
 					SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
 					sctp_stop_timers_for_shutdown(stcb);
 					sctp_send_shutdown(stcb, net);
 					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
 							 net);
 					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
 							 asoc->primary_destination);
 					added_control = 1;
 					do_chunk_output = 0;
 				}
 			} else {
 				/*
 				 * we still got (or just got) data to send, so set
 				 * SHUTDOWN_PENDING
 				 */
 				/*
 				 * XXX sockets draft says that SCTP_EOF should be
 				 * sent with no data.  currently, we will allow user
 				 * data to be sent first and move to
 				 * SHUTDOWN-PENDING
 				 */
 				if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
 				    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
 				    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
 					if (asoc->locked_on_sending) {
 						/* Locked to send out the data */
 						struct sctp_stream_queue_pending *sp;
 						sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
 						if (sp) {
 							if ((sp->length == 0) && (sp->msg_is_complete == 0))
 								asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
 						}
 					}
 					asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
 					if (TAILQ_EMPTY(&asoc->send_queue) &&
 					    TAILQ_EMPTY(&asoc->sent_queue) &&
 					    (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
 					abort_anyway:
 						atomic_add_int(&stcb->asoc.refcnt, 1);
 						sctp_abort_an_association(stcb->sctp_ep, stcb,
 									  NULL, SCTP_SO_NOT_LOCKED);
 						atomic_add_int(&stcb->asoc.refcnt, -1);
 						goto no_chunk_output;
 					}
 					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
 							 asoc->primary_destination);
 				}
 			}
 		}
 	}
 	un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
 		   (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
 	if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
 	    (stcb->asoc.total_flight > 0) &&
 	    (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
 		do_chunk_output = 0;
 	}
 	if (do_chunk_output)
 		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
 	else if (added_control) {
 		int num_out = 0, reason = 0, now_filled = 0;
 		struct timeval now;
 		int frag_point;
 		frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
 		(void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
 				      &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
 	}
  no_chunk_output:
 	if (ret) {
 		ca->cnt_failed++;
 	} else {
 		ca->cnt_sent++;
 	}
 }
 static void
 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
 {
 	struct sctp_copy_all *ca;
 	ca = (struct sctp_copy_all *)ptr;
 	/*
 	 * Do a notify here? Kacheong suggests that the notify be done at
 	 * the send time.. so you would push up a notification if any send
 	 * failed. Don't know if this is feasable since the only failures we
 	 * have is "memory" related and if you cannot get an mbuf to send
 	 * the data you surely can't get an mbuf to send up to notify the
 	 * user you can't send the data :->
 	 */
 	/* now free everything */
 	sctp_m_freem(ca->m);
 	SCTP_FREE(ca, SCTP_M_COPYAL);
 }
 #define	MC_ALIGN(m, len) do {						\
 	SCTP_BUF_RESV_UF(m, ((MCLBYTES - (len)) & ~(sizeof(long) - 1));	\
 } while (0)
 static struct mbuf *
 sctp_copy_out_all(struct uio *uio, int len)
 {
 	struct mbuf *ret, *at;
 	int left, willcpy, cancpy, error;
 	ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
 	if (ret == NULL) {
 		/* TSNH */
 		return (NULL);
 	}
 	left = len;
 	SCTP_BUF_LEN(ret) = 0;
 	/* save space for the data chunk header */
 	cancpy = M_TRAILINGSPACE(ret);
 	willcpy = min(cancpy, left);
 	at = ret;
 	while (left > 0) {
 		/* Align data to the end */
 		error = uiomove(mtod(at, caddr_t), willcpy, uio);
 		if (error) {
 	err_out_now:
 			sctp_m_freem(at);
 			return (NULL);
 		}
 		SCTP_BUF_LEN(at) = willcpy;
 		SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
 		left -= willcpy;
 		if (left > 0) {
 			SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
 			if (SCTP_BUF_NEXT(at) == NULL) {
 				goto err_out_now;
 			}
 			at = SCTP_BUF_NEXT(at);
 			SCTP_BUF_LEN(at) = 0;
 			cancpy = M_TRAILINGSPACE(at);
 			willcpy = min(cancpy, left);
 		}
 	}
 	return (ret);
 }
 static int
 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
     struct sctp_sndrcvinfo *srcv)
 {
 	int ret;
 	struct sctp_copy_all *ca;
 	SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
 		    SCTP_M_COPYAL);
 	if (ca == NULL) {
 		sctp_m_freem(m);
 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 		return (ENOMEM);
 	}
 	memset(ca, 0, sizeof(struct sctp_copy_all));
 	ca->inp = inp;
 	if (srcv) {
 		memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
 	}
 	/*
 	 * take off the sendall flag, it would be bad if we failed to do
 	 * this :-0
 	 */
 	ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
 	/* get length and mbuf chain */
 	if (uio) {
 #if defined(__APPLE__)
 #if defined(APPLE_LEOPARD)
 		ca->sndlen = uio->uio_resid;
 #else
 		ca->sndlen = uio_resid(uio);
 #endif
 #else
 		ca->sndlen = uio->uio_resid;
 #endif
 #if defined(__APPLE__)
 		SCTP_SOCKET_UNLOCK(SCTP_INP_SO(inp), 0);
 #endif
 		ca->m = sctp_copy_out_all(uio, ca->sndlen);
 #if defined(__APPLE__)
 		SCTP_SOCKET_LOCK(SCTP_INP_SO(inp), 0);
 #endif
 		if (ca->m == NULL) {
 			SCTP_FREE(ca, SCTP_M_COPYAL);
 			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 			return (ENOMEM);
 		}
 	} else {
 		/* Gather the length of the send */
 		struct mbuf *mat;
 		ca->sndlen = 0;
 		for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
 			ca->sndlen += SCTP_BUF_LEN(mat);
 		}
 	}
 	ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
 				     SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
 				     SCTP_ASOC_ANY_STATE,
 				     (void *)ca, 0,
 				     sctp_sendall_completes, inp, 1);
 	if (ret) {
 		SCTP_PRINTF("Failed to initiate iterator for sendall\n");
 		SCTP_FREE(ca, SCTP_M_COPYAL);
 		SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
 		return (EFAULT);
 	}
 	return (0);
 }
 void
 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
 {
 	struct sctp_tmit_chunk *chk, *nchk;
 	TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
 		if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
 			TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
 			if (chk->data) {
 				sctp_m_freem(chk->data);
 				chk->data = NULL;
 			}
 			asoc->ctrl_queue_cnt--;
 			sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
 		}
 	}
 }
 void
 sctp_toss_old_asconf(struct sctp_tcb *stcb)
 {
 	struct sctp_association *asoc;
 	struct sctp_tmit_chunk *chk, *nchk;
 	struct sctp_asconf_chunk *acp;
 	asoc = &stcb->asoc;
 	TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
 		/* find SCTP_ASCONF chunk in queue */
 		if (chk->rec.chunk_id.id == SCTP_ASCONF) {
 			if (chk->data) {
 				acp = mtod(chk->data, struct sctp_asconf_chunk *);
 				if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
 					/* Not Acked yet */
 					break;
 				}
 			}
 			TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
 			if (chk->data) {
 				sctp_m_freem(chk->data);
 				chk->data = NULL;
 			}
 			asoc->ctrl_queue_cnt--;
 			sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
 		}
 	}
 }
 static void
 sctp_clean_up_datalist(struct sctp_tcb *stcb,
     struct sctp_association *asoc,
     struct sctp_tmit_chunk **data_list,
     int bundle_at,
     struct sctp_nets *net)
 {
 	int i;
 	struct sctp_tmit_chunk *tp1;
 	for (i = 0; i < bundle_at; i++) {
 		/* off of the send queue */
 		TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
 		asoc->send_queue_cnt--;
 		if (i > 0) {
 			/*
 			 * Any chunk NOT 0 you zap the time chunk 0 gets
 			 * zapped or set based on if a RTO measurment is
 			 * needed.
 			 */
 			data_list[i]->do_rtt = 0;
 		}
 		/* record time */
 		data_list[i]->sent_rcv_time = net->last_sent_time;
 		data_list[i]->rec.data.cwnd_at_send = net->cwnd;
 		data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
 		if (data_list[i]->whoTo == NULL) {
 			data_list[i]->whoTo = net;
 			atomic_add_int(&net->ref_count, 1);
 		}
 		/* on to the sent queue */
 		tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
 		if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
 			struct sctp_tmit_chunk *tpp;
 			/* need to move back */
 		back_up_more:
 			tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
 			if (tpp == NULL) {
 				TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
 				goto all_done;
 			}
 			tp1 = tpp;
 			if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
 				goto back_up_more;
 			}
 			TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
 		} else {
 			TAILQ_INSERT_TAIL(&asoc->sent_queue,
 					  data_list[i],
 					  sctp_next);
 		}
 	all_done:
 		/* This does not lower until the cum-ack passes it */
 		asoc->sent_queue_cnt++;
 		if ((asoc->peers_rwnd <= 0) &&
 		    (asoc->total_flight == 0) &&
 		    (bundle_at == 1)) {
 			/* Mark the chunk as being a window probe */
 			SCTP_STAT_INCR(sctps_windowprobed);
 		}
 #ifdef SCTP_AUDITING_ENABLED
 		sctp_audit_log(0xC2, 3);
 #endif
 		data_list[i]->sent = SCTP_DATAGRAM_SENT;
 		data_list[i]->snd_count = 1;
 		data_list[i]->rec.data.chunk_was_revoked = 0;
 		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
 			sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
 				       data_list[i]->whoTo->flight_size,
 				       data_list[i]->book_size,
 				       (uintptr_t)data_list[i]->whoTo,
 				       data_list[i]->rec.data.TSN_seq);
 		}
 		sctp_flight_size_increase(data_list[i]);
 		sctp_total_flight_increase(stcb, data_list[i]);
 		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
 			sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
 			      asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
 		}
 		asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
 						    (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
 		if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
 			/* SWS sender side engages */
 			asoc->peers_rwnd = 0;
 		}
 	}
 	if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
 		(*asoc->cc_functions.sctp_cwnd_update_packet_transmitted)(stcb, net);
 	}
 }
 static void
 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
 	SCTP_UNUSED
 #endif
 )
 {
 	struct sctp_tmit_chunk *chk, *nchk;
 	TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
 		if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
 		    (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) ||	/* EY */
 		    (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
 		    (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
 		    (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
 		    (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
 		    (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
 		    (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
 		    (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
 		    (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
 		    (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
 		    (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
 			/* Stray chunks must be cleaned up */
 	clean_up_anyway:
 			TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
 			if (chk->data) {
 				sctp_m_freem(chk->data);
 				chk->data = NULL;
 			}
 			asoc->ctrl_queue_cnt--;
 			if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
 				asoc->fwd_tsn_cnt--;
 			sctp_free_a_chunk(stcb, chk, so_locked);
 		} else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
 			/* special handling, we must look into the param */
 			if (chk != asoc->str_reset) {
 				goto clean_up_anyway;
 			}
 		}
 	}
 }
 static int
 sctp_can_we_split_this(struct sctp_tcb *stcb,
                        uint32_t length,
                        uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
 {
 	/* Make a decision on if I should split a
 	 * msg into multiple parts. This is only asked of
 	 * incomplete messages.
 	 */
 	if (eeor_on) {
 		/* If we are doing EEOR we need to always send
 		 * it if its the entire thing, since it might
 		 * be all the guy is putting in the hopper.
 		 */
 		if (goal_mtu >= length) {
 			/*-
 			 * If we have data outstanding,
 			 * we get another chance when the sack
 			 * arrives to transmit - wait for more data
 			 */
 			if (stcb->asoc.total_flight == 0) {
 				/* If nothing is in flight, we zero
 				 * the packet counter.
 				 */
 				return (length);
 			}
 			return (0);
 		} else {
 			/* You can fill the rest */
 			return (goal_mtu);
 		}
 	}
 	/*-
 	 * For those strange folk that make the send buffer
 	 * smaller than our fragmentation point, we can't
 	 * get a full msg in so we have to allow splitting.
 	 */
 	if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
 		return (length);
 	}
 	if ((length <= goal_mtu) ||
 	    ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
 		/* Sub-optimial residual don't split in non-eeor mode. */
 		return (0);
 	}
 	/* If we reach here length is larger
 	 * than the goal_mtu. Do we wish to split
 	 * it for the sake of packet putting together?
 	 */
 	if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
 		/* Its ok to split it */
 		return (min(goal_mtu, frag_point));
 	}
 	/* Nope, can't split */
 	return (0);
 }
 static uint32_t
 sctp_move_to_outqueue(struct sctp_tcb *stcb,
                       struct sctp_stream_out *strq,
                       uint32_t goal_mtu,
                       uint32_t frag_point,
                       int *locked,
                       int *giveup,
                       int eeor_mode,
                       int *bail,
                       int so_locked
 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
                       SCTP_UNUSED
 #endif
 	)
 {
 	/* Move from the stream to the send_queue keeping track of the total */
 	struct sctp_association *asoc;
 	struct sctp_stream_queue_pending *sp;
 	struct sctp_tmit_chunk *chk;
 	struct sctp_data_chunk *dchkh;
 	uint32_t to_move, length;
 	uint8_t rcv_flags = 0;
 	uint8_t some_taken;
 	uint8_t send_lock_up = 0;
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	asoc = &stcb->asoc;
 one_more_time:
 	/*sa_ignore FREED_MEMORY*/
 	sp = TAILQ_FIRST(&strq->outqueue);
 	if (sp == NULL) {
 		*locked = 0;
 		if (send_lock_up == 0) {
 			SCTP_TCB_SEND_LOCK(stcb);
 			send_lock_up = 1;
 		}
 		sp = TAILQ_FIRST(&strq->outqueue);
 		if (sp) {
 			goto one_more_time;
 		}
 		if (strq->last_msg_incomplete) {
 			SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
 			            strq->stream_no,
 			            strq->last_msg_incomplete);
 			strq->last_msg_incomplete = 0;
 		}
 		to_move = 0;
 		if (send_lock_up) {
 			SCTP_TCB_SEND_UNLOCK(stcb);
 			send_lock_up = 0;
 		}
 		goto out_of;
 	}
 	if ((sp->msg_is_complete) && (sp->length == 0)) {
 		if (sp->sender_all_done) {
 			/* We are doing differed cleanup. Last
 			 * time through when we took all the data
 			 * the sender_all_done was not set.
 			 */
 			if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
 				SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
 				SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
 				            sp->sender_all_done,
 				            sp->length,
 				            sp->msg_is_complete,
 				            sp->put_last_out,
 				            send_lock_up);
 			}
 			if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up  == 0)) {
 				SCTP_TCB_SEND_LOCK(stcb);
 				send_lock_up = 1;
 			}
 			atomic_subtract_int(&asoc->stream_queue_cnt, 1);
 			TAILQ_REMOVE(&strq->outqueue, sp, next);
 			stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
 			if (sp->net) {
 				sctp_free_remote_addr(sp->net);
 				sp->net = NULL;
 			}
 			if (sp->data) {
 				sctp_m_freem(sp->data);
 				sp->data = NULL;
 			}
 			sctp_free_a_strmoq(stcb, sp, so_locked);
 			/* we can't be locked to it */
 			*locked = 0;
 			stcb->asoc.locked_on_sending = NULL;
 			if (send_lock_up) {
 				SCTP_TCB_SEND_UNLOCK(stcb);
 				send_lock_up = 0;
 			}
 			/* back to get the next msg */
 			goto one_more_time;
 		} else {
 			/* sender just finished this but
 			 * still holds a reference
 			 */
 			*locked = 1;
 			*giveup = 1;
 			to_move = 0;
 			goto out_of;
 		}
 	} else {
 		/* is there some to get */
 		if (sp->length == 0) {
 			/* no */
 			*locked = 1;
 			*giveup = 1;
 			to_move = 0;
 			goto out_of;
 		} else if (sp->discard_rest) {
 			if (send_lock_up == 0) {
 				SCTP_TCB_SEND_LOCK(stcb);
 				send_lock_up = 1;
 			}
 			/* Whack down the size */
 			atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
 			if ((stcb->sctp_socket != NULL) &&	     \
 			    ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
 			     (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
 				atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
 			}
 			if (sp->data) {
 				sctp_m_freem(sp->data);
 				sp->data = NULL;
 				sp->tail_mbuf = NULL;
 			}
 			sp->length = 0;
 			sp->some_taken = 1;
 			*locked = 1;
 			*giveup = 1;
 			to_move = 0;
 			goto out_of;
 		}
 	}
 	some_taken = sp->some_taken;
 	if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
 		sp->msg_is_complete = 1;
 	}
 re_look:
 	length = sp->length;
 	if (sp->msg_is_complete) {
 		/* The message is complete */
 		to_move = min(length, frag_point);
 		if (to_move == length) {
 			/* All of it fits in the MTU */
 			if (sp->some_taken) {
 				rcv_flags |= SCTP_DATA_LAST_FRAG;
 				sp->put_last_out = 1;
 			} else {
 				rcv_flags |= SCTP_DATA_NOT_FRAG;
 				sp->put_last_out = 1;
 			}
 		} else {
 			/* Not all of it fits, we fragment */
 			if (sp->some_taken == 0) {
 				rcv_flags |= SCTP_DATA_FIRST_FRAG;
 			}
 			sp->some_taken = 1;
 		}
 	} else {
 		to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
 		if (to_move) {
 			/*-
 			 * We use a snapshot of length in case it
 			 * is expanding during the compare.
 			 */
 			uint32_t llen;
 			llen = length;
 			if (to_move >= llen) {
 				to_move = llen;
 				if (send_lock_up == 0) {
 					/*-
 					 * We are taking all of an incomplete msg
 					 * thus we need a send lock.
 					 */
 					SCTP_TCB_SEND_LOCK(stcb);
 					send_lock_up = 1;
 					if (sp->msg_is_complete) {
 						/* the sender finished the msg */
 						goto re_look;
 					}
 				}
 			}
 			if (sp->some_taken == 0) {
 				rcv_flags |= SCTP_DATA_FIRST_FRAG;
 				sp->some_taken = 1;
 			}
 		} else {
 			/* Nothing to take. */
 			if (sp->some_taken) {
 				*locked = 1;
 			}
 			*giveup = 1;
 			to_move = 0;
 			goto out_of;
 		}
 	}
 	/* If we reach here, we can copy out a chunk */
 	sctp_alloc_a_chunk(stcb, chk);
 	if (chk == NULL) {
 		/* No chunk memory */
 		*giveup = 1;
 		to_move = 0;
 		goto out_of;
 	}
 	/* Setup for unordered if needed by looking
 	 * at the user sent info flags.
 	 */
 	if (sp->sinfo_flags & SCTP_UNORDERED) {
 		rcv_flags |= SCTP_DATA_UNORDERED;
 	}
 	if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
 	    ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
 		rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
 	}
 	/* clear out the chunk before setting up */
 	memset(chk, 0, sizeof(*chk));
 	chk->rec.data.rcv_flags = rcv_flags;
 	if (to_move >= length) {
 		/* we think we can steal the whole thing */
 		if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
 			SCTP_TCB_SEND_LOCK(stcb);
 			send_lock_up = 1;
 		}
 		if (to_move < sp->length) {
 			/* bail, it changed */
 			goto dont_do_it;
 		}
 		chk->data = sp->data;
 		chk->last_mbuf = sp->tail_mbuf;
 		/* register the stealing */
 		sp->data = sp->tail_mbuf = NULL;
 	} else {
 		struct mbuf *m;
 	dont_do_it:
 		chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
 		chk->last_mbuf = NULL;
 		if (chk->data == NULL) {
 			sp->some_taken = some_taken;
 			sctp_free_a_chunk(stcb, chk, so_locked);
 			*bail = 1;
 			to_move = 0;
 			goto out_of;
 		}
 #ifdef SCTP_MBUF_LOGGING
 		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
 			struct mbuf *mat;
 			for (mat = chk->data; mat; mat = SCTP_BUF_NEXT(mat)) {
 				if (SCTP_BUF_IS_EXTENDED(mat)) {
 					sctp_log_mb(mat, SCTP_MBUF_ICOPY);
 				}
 			}
 		}
 #endif
 		/* Pull off the data */
 		m_adj(sp->data, to_move);
 		/* Now lets work our way down and compact it */
 		m = sp->data;
 		while (m && (SCTP_BUF_LEN(m) == 0)) {
 			sp->data  = SCTP_BUF_NEXT(m);
 			SCTP_BUF_NEXT(m) = NULL;
 			if (sp->tail_mbuf == m) {
 				/*-
 				 * Freeing tail? TSNH since
 				 * we supposedly were taking less
 				 * than the sp->length.
 				 */
 #ifdef INVARIANTS
 				panic("Huh, freing tail? - TSNH");
 #else
 				SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
 				sp->tail_mbuf = sp->data = NULL;
 				sp->length = 0;
 #endif
 			}
 			sctp_m_free(m);
 			m = sp->data;
 		}
 	}
 	if (SCTP_BUF_IS_EXTENDED(chk->data)) {
 		chk->copy_by_ref = 1;
 	} else {
 		chk->copy_by_ref = 0;
 	}
 	/* get last_mbuf and counts of mb useage
 	 * This is ugly but hopefully its only one mbuf.
 	 */
 	if (chk->last_mbuf == NULL) {
 		chk->last_mbuf = chk->data;
 		while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
 			chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
 		}
 	}
 	if (to_move > length) {
 		/*- This should not happen either
 		 * since we always lower to_move to the size
 		 * of sp->length if its larger.
 		 */
 #ifdef INVARIANTS
 		panic("Huh, how can to_move be larger?");
 #else
 		SCTP_PRINTF("Huh, how can to_move be larger?\n");
 		sp->length = 0;
 #endif
 	} else {
 		atomic_subtract_int(&sp->length, to_move);
 	}
 	if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
 		/* Not enough room for a chunk header, get some */
 		struct mbuf *m;
 		m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA);
 		if (m == NULL) {
 			/*
 			 * we're in trouble here. _PREPEND below will free
 			 * all the data if there is no leading space, so we
 			 * must put the data back and restore.
 			 */
 			if (send_lock_up == 0) {
 				SCTP_TCB_SEND_LOCK(stcb);
 				send_lock_up = 1;
 			}
 			if (chk->data == NULL) {
 				/* unsteal the data */
 				sp->data = chk->data;
 				sp->tail_mbuf = chk->last_mbuf;
 			} else {
 				struct mbuf *m_tmp;
 				/* reassemble the data */
 				m_tmp = sp->data;
 				sp->data = chk->data;
 				SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
 			}
 			sp->some_taken = some_taken;
 			atomic_add_int(&sp->length, to_move);
 			chk->data = NULL;
 			*bail = 1;
 			sctp_free_a_chunk(stcb, chk, so_locked);
 			to_move = 0;
 			goto out_of;
 		} else {
 			SCTP_BUF_LEN(m) = 0;
 			SCTP_BUF_NEXT(m) = chk->data;
 			chk->data = m;
 			M_ALIGN(chk->data, 4);
 		}
 	}
 	SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT);
 	if (chk->data == NULL) {
 		/* HELP, TSNH since we assured it would not above? */
 #ifdef INVARIANTS
 		panic("prepend failes HELP?");
 #else
 		SCTP_PRINTF("prepend fails HELP?\n");
 		sctp_free_a_chunk(stcb, chk, so_locked);
 #endif
 		*bail = 1;
 		to_move = 0;
 		goto out_of;
 	}
 	sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
 	chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
 	chk->book_size_scale = 0;
 	chk->sent = SCTP_DATAGRAM_UNSENT;
 	chk->flags = 0;
 	chk->asoc = &stcb->asoc;
 	chk->pad_inplace = 0;
 	chk->no_fr_allowed = 0;
 	chk->rec.data.stream_seq = strq->next_sequence_send;
 	if (rcv_flags & SCTP_DATA_LAST_FRAG) {
 		strq->next_sequence_send++;
 	}
 	chk->rec.data.stream_number = sp->stream;
 	chk->rec.data.payloadtype = sp->ppid;
 	chk->rec.data.context = sp->context;
 	chk->rec.data.doing_fast_retransmit = 0;
 	chk->rec.data.timetodrop = sp->ts;
 	chk->flags = sp->act_flags;
 	if (sp->net) {
 		chk->whoTo = sp->net;
 		atomic_add_int(&chk->whoTo->ref_count, 1);
 	} else
 		chk->whoTo = NULL;
 	if (sp->holds_key_ref) {
 		chk->auth_keyid = sp->auth_keyid;
 		sctp_auth_key_acquire(stcb, chk->auth_keyid);
 		chk->holds_key_ref = 1;
 	}
 #if defined(__FreeBSD__) || defined(__Panda__)
 	chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
 #else
 	chk->rec.data.TSN_seq = asoc->sending_seq++;
 #endif
 	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
 		sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
 		               (uintptr_t)stcb, sp->length,
 		               (uint32_t)((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
 		               chk->rec.data.TSN_seq);
 	}
 	dchkh = mtod(chk->data, struct sctp_data_chunk *);
 	/*
 	 * Put the rest of the things in place now. Size was done
 	 * earlier in previous loop prior to padding.
 	 */
 #ifdef SCTP_ASOCLOG_OF_TSNS
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
 		asoc->tsn_out_at = 0;
 		asoc->tsn_out_wrapped = 1;
 	}
 	asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
 	asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
 	asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
 	asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
 	asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
 	asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
 	asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
 	asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
 	asoc->tsn_out_at++;
 #endif
 	dchkh->ch.chunk_type = SCTP_DATA;
 	dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
 	dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
 	dchkh->dp.stream_id = htons(strq->stream_no);
 	dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
 	dchkh->dp.protocol_id = chk->rec.data.payloadtype;
 	dchkh->ch.chunk_length = htons(chk->send_size);
 	/* Now advance the chk->send_size by the actual pad needed. */
 	if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
 		/* need a pad */
 		struct mbuf *lm;
 		int pads;
 		pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
 		if (sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf) == 0) {
 			chk->pad_inplace = 1;
 		}
 		if ((lm = SCTP_BUF_NEXT(chk->last_mbuf)) != NULL) {
 			/* pad added an mbuf */
 			chk->last_mbuf = lm;
 		}
 		chk->send_size += pads;
 	}
 	if (PR_SCTP_ENABLED(chk->flags)) {
 		asoc->pr_sctp_cnt++;
 	}
 	if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
 		/* All done pull and kill the message */
 		atomic_subtract_int(&asoc->stream_queue_cnt, 1);
 		if (sp->put_last_out == 0) {
 			SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
 			SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
 			            sp->sender_all_done,
 			            sp->length,
 			            sp->msg_is_complete,
 			            sp->put_last_out,
 			            send_lock_up);
 		}
 		if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
 			SCTP_TCB_SEND_LOCK(stcb);
 			send_lock_up = 1;
 		}
 		TAILQ_REMOVE(&strq->outqueue, sp, next);
 		stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
 		if (sp->net) {
 			sctp_free_remote_addr(sp->net);
 			sp->net = NULL;
 		}
 		if (sp->data) {
 			sctp_m_freem(sp->data);
 			sp->data = NULL;
 		}
 		sctp_free_a_strmoq(stcb, sp, so_locked);
 		/* we can't be locked to it */
 		*locked = 0;
 		stcb->asoc.locked_on_sending = NULL;
 	} else {
 		/* more to go, we are locked */
 		*locked = 1;
 	}
 	asoc->chunks_on_out_queue++;
 	strq->chunks_on_queues++;
 	TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
 	asoc->send_queue_cnt++;
 out_of:
 	if (send_lock_up) {
 		SCTP_TCB_SEND_UNLOCK(stcb);
 	}
 	return (to_move);
 }
 static void
 sctp_fill_outqueue(struct sctp_tcb *stcb,
     struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
 	SCTP_UNUSED
 #endif
 )
 {
 	struct sctp_association *asoc;
 	struct sctp_stream_out *strq;
 	int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
 	int locked, giveup;
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	asoc = &stcb->asoc;
 	switch (net->ro._l_addr.sa.sa_family) {
 #ifdef INET
 		case AF_INET:
 			goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
 			break;
 #endif
 #ifdef INET6
 		case AF_INET6:
 			goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
 			break;
 #endif
 #if defined(__Userspace__)
 		case AF_CONN:
 			goal_mtu = net->mtu - sizeof(struct sctphdr);
 			break;
 #endif
 		default:
 			/* TSNH */
 			goal_mtu = net->mtu;
 			break;
 	}
 	/* Need an allowance for the data chunk header too */
 	goal_mtu -= sizeof(struct sctp_data_chunk);
 	/* must make even word boundary */
 	goal_mtu &= 0xfffffffc;
 	if (asoc->locked_on_sending) {
 		/* We are stuck on one stream until the message completes. */
 		strq = asoc->locked_on_sending;
 		locked = 1;
 	} else {
 		strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
 		locked = 0;
 	}
 	while ((goal_mtu > 0) && strq) {
 		giveup = 0;
 		bail = 0;
 		moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
 						       &giveup, eeor_mode, &bail, so_locked);
 		if (moved_how_much)
 			stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
 		if (locked) {
 			asoc->locked_on_sending = strq;
 			if ((moved_how_much == 0) || (giveup) || bail)
 				/* no more to move for now */
 				break;
 		} else {
 			asoc->locked_on_sending = NULL;
 			if ((giveup) || bail) {
 				break;
 			}
 			strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
 			if (strq == NULL) {
 				break;
 			}
 		}
 		total_moved += moved_how_much;
 		goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
 		goal_mtu &= 0xfffffffc;
 	}
 	if (bail)
 		*quit_now = 1;
 	stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
 	if (total_moved == 0) {
 		if ((stcb->asoc.sctp_cmt_on_off == 0) &&
 		    (net == stcb->asoc.primary_destination)) {
 			/* ran dry for primary network net */
 			SCTP_STAT_INCR(sctps_primary_randry);
 		} else if (stcb->asoc.sctp_cmt_on_off > 0) {
 			/* ran dry with CMT on */
 			SCTP_STAT_INCR(sctps_cmt_randry);
 		}
 	}
 }
 void
 sctp_fix_ecn_echo(struct sctp_association *asoc)
 {
 	struct sctp_tmit_chunk *chk;
 	TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
 		if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
 			chk->sent = SCTP_DATAGRAM_UNSENT;
 		}
 	}
 }
 void
 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
 {
 	struct sctp_association *asoc;
 	struct sctp_tmit_chunk *chk;
 	struct sctp_stream_queue_pending *sp;
 	unsigned int i;
 	if (net == NULL) {
 		return;
 	}
 	asoc = &stcb->asoc;
 	for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
 		TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
 			if (sp->net == net) {
 				sctp_free_remote_addr(sp->net);
 				sp->net = NULL;
 			}
 		}
 	}
 	TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
 		if (chk->whoTo == net) {
 			sctp_free_remote_addr(chk->whoTo);
 			chk->whoTo = NULL;
 		}
 	}
 }
 int
 sctp_med_chunk_output(struct sctp_inpcb *inp,
 		      struct sctp_tcb *stcb,
 		      struct sctp_association *asoc,
 		      int *num_out,
 		      int *reason_code,
 		      int control_only, int from_where,
 		      struct timeval *now, int *now_filled, int frag_point, int so_locked
 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
 		      SCTP_UNUSED
 #endif
 	)
 {
 	/**
 	 * Ok this is the generic chunk service queue. we must do the
 	 * following: - Service the stream queue that is next, moving any
 	 * message (note I must get a complete message i.e. FIRST/MIDDLE and
 	 * LAST to the out queue in one pass) and assigning TSN's - Check to
 	 * see if the cwnd/rwnd allows any output, if so we go ahead and
 	 * fomulate and send the low level chunks. Making sure to combine
 	 * any control in the control chunk queue also.
 	 */
 	struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
 	struct mbuf *outchain, *endoutchain;
 	struct sctp_tmit_chunk *chk, *nchk;
 	/* temp arrays for unlinking */
 	struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
 	int no_fragmentflg, error;
 	unsigned int max_rwnd_per_dest, max_send_per_dest;
 	int one_chunk, hbflag, skip_data_for_this_net;
 	int asconf, cookie, no_out_cnt;
 	int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
 	unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
 	int tsns_sent = 0;
 	uint32_t auth_offset = 0;
 	struct sctp_auth_chunk *auth = NULL;
 	uint16_t auth_keyid;
 	int override_ok = 1;
 	int skip_fill_up = 0;
 	int data_auth_reqd = 0;
 	/* JRS 5/14/07 - Add flag for whether a heartbeat is sent to
 	   the destination. */
 	int quit_now = 0;
 #if defined(__APPLE__)
 	if (so_locked) {
 		sctp_lock_assert(SCTP_INP_SO(inp));
 	} else {
 		sctp_unlock_assert(SCTP_INP_SO(inp));
 	}
 #endif
 	*num_out = 0;
 	auth_keyid = stcb->asoc.authinfo.active_keyid;
 	if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
 	    (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
 	    (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
 		eeor_mode = 1;
 	} else {
 		eeor_mode = 0;
 	}
 	ctl_cnt = no_out_cnt = asconf = cookie = 0;
 	/*
 	 * First lets prime the pump. For each destination, if there is room
 	 * in the flight size, attempt to pull an MTU's worth out of the
 	 * stream queues into the general send_queue
 	 */
 #ifdef SCTP_AUDITING_ENABLED
 	sctp_audit_log(0xC2, 2);
 #endif
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	hbflag = 0;
 	if ((control_only) || (asoc->stream_reset_outstanding))
 		no_data_chunks = 1;
 	else
 		no_data_chunks = 0;
 	/* Nothing to possible to send? */
 	if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
 	     (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
 	    TAILQ_EMPTY(&asoc->asconf_send_queue) &&
 	    TAILQ_EMPTY(&asoc->send_queue) &&
 	    stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
 	nothing_to_send:
 		*reason_code = 9;
 		return (0);
 	}
 	if (asoc->peers_rwnd == 0) {
 		/* No room in peers rwnd */
 		*reason_code = 1;
 		if (asoc->total_flight > 0) {
 			/* we are allowed one chunk in flight */
 			no_data_chunks = 1;
 		}
 	}
 	if (stcb->asoc.ecn_echo_cnt_onq) {
 		/* Record where a sack goes, if any */
 		if (no_data_chunks &&
 		    (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
 			/* Nothing but ECNe to send - we don't do that */
 			goto nothing_to_send;
 		}
 		TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
 			if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
 			    (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
 				sack_goes_to = chk->whoTo;
 				break;
 			}
 		}
 	}
 	max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
 	if (stcb->sctp_socket)
 		max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
 	else
 		max_send_per_dest = 0;
 	if (no_data_chunks == 0) {
 		/* How many non-directed chunks are there? */
 		TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
 			if (chk->whoTo == NULL) {
 				/* We already have non-directed
 				 * chunks on the queue, no need
 				 * to do a fill-up.
 				 */
 				skip_fill_up = 1;
 				break;
 			}
 		}
 	}
 	if ((no_data_chunks == 0) &&
 	    (skip_fill_up == 0) &&
 	    (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
 		TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
 			/*
 			 * This for loop we are in takes in
 			 * each net, if its's got space in cwnd and
 			 * has data sent to it (when CMT is off) then it
 			 * calls sctp_fill_outqueue for the net. This gets
 			 * data on the send queue for that network.
 			 *
 			 * In sctp_fill_outqueue TSN's are assigned and
 			 * data is copied out of the stream buffers. Note
 			 * mostly copy by reference (we hope).
 			 */
 			net->window_probe = 0;
 			if ((net != stcb->asoc.alternate) &&
 			    ((net->dest_state & SCTP_ADDR_PF) ||
 			     (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
 			     (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
 				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
 					sctp_log_cwnd(stcb, net, 1,
 						      SCTP_CWND_LOG_FILL_OUTQ_CALLED);
 				}
 			        continue;
 			}
 			if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
 			    (net->flight_size == 0)) {
 				(*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins)(stcb, net);
 			}
 			if (net->flight_size >= net->cwnd) {
 				/* skip this network, no room - can't fill */
 				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
 					sctp_log_cwnd(stcb, net, 3,
 						      SCTP_CWND_LOG_FILL_OUTQ_CALLED);
 				}
 				continue;
 			}
 			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
 				sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
 			}
 			sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
 			if (quit_now) {
 				/* memory alloc failure */
 				no_data_chunks = 1;
 				break;
 			}
 		}
 	}
 	/* now service each destination and send out what we can for it */
 	/* Nothing to send? */
 	if (TAILQ_EMPTY(&asoc->control_send_queue) &&
 	    TAILQ_EMPTY(&asoc->asconf_send_queue) &&
 	    TAILQ_EMPTY(&asoc->send_queue)) {
 		*reason_code = 8;
 		return (0);
 	}
 	if (asoc->sctp_cmt_on_off > 0) {
 		/* get the last start point */
 		start_at = asoc->last_net_cmt_send_started;
 		if (start_at == NULL) {
 			/* null so to beginning */
 			start_at = TAILQ_FIRST(&asoc->nets);
 		} else {
 			start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
 			if (start_at == NULL) {
 				start_at = TAILQ_FIRST(&asoc->nets);
 			}
 		}
 		asoc->last_net_cmt_send_started = start_at;
 	} else {
 		start_at = TAILQ_FIRST(&asoc->nets);
 	}
 	TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
 		if (chk->whoTo == NULL) {
 			if (asoc->alternate) {
 				chk->whoTo = asoc->alternate;
 			} else {
 				chk->whoTo = asoc->primary_destination;
 			}
 			atomic_add_int(&chk->whoTo->ref_count, 1);
 		}
 	}
 	old_start_at = NULL;
 again_one_more_time:
 	for (net = start_at ; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
 		/* how much can we send? */
 		/* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
 		if (old_start_at && (old_start_at == net)) {
 			/* through list ocmpletely. */
 			break;
 		}
 		tsns_sent = 0xa;
 		if (TAILQ_EMPTY(&asoc->control_send_queue) &&
 		    TAILQ_EMPTY(&asoc->asconf_send_queue) &&
 		    (net->flight_size >= net->cwnd)) {
 			/* Nothing on control or asconf and flight is full, we can skip
 			 * even in the CMT case.
 			 */
 			continue;
 		}
 		bundle_at = 0;
 		endoutchain = outchain = NULL;
 		no_fragmentflg = 1;
 		one_chunk = 0;
 		if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
 			skip_data_for_this_net = 1;
 		} else {
 			skip_data_for_this_net = 0;
 		}
 #if !(defined(__Panda__) || defined(__Windows__) || defined(__Userspace__) || defined(__APPLE__))
 		if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
 			/*
 			 * if we have a route and an ifp check to see if we
 			 * have room to send to this guy
 			 */
 			struct ifnet *ifp;
 			ifp = net->ro.ro_rt->rt_ifp;
 			if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
 				SCTP_STAT_INCR(sctps_ifnomemqueued);
 				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
 					sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
 				}
 				continue;
 			}
 		}
 #endif
 		switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
 #ifdef INET
 		case AF_INET:
 			mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
 			break;
 #endif
 #ifdef INET6
 		case AF_INET6:
 			mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
 			break;
 #endif
 #if defined(__Userspace__)
 		case AF_CONN:
 			mtu = net->mtu - sizeof(struct sctphdr);
 			break;
 #endif
 		default:
 			/* TSNH */
 			mtu = net->mtu;
 			break;
 		}
 		mx_mtu = mtu;
 		to_out = 0;
 		if (mtu > asoc->peers_rwnd) {
 			if (asoc->total_flight > 0) {
 				/* We have a packet in flight somewhere */
 				r_mtu = asoc->peers_rwnd;
 			} else {
 				/* We are always allowed to send one MTU out */
 				one_chunk = 1;
 				r_mtu = mtu;
 			}
 		} else {
 			r_mtu = mtu;
 		}
 		/************************/
 		/* ASCONF transmission */
 		/************************/
 		/* Now first lets go through the asconf queue */
 		TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
 			if (chk->rec.chunk_id.id != SCTP_ASCONF) {
 				continue;
 			}
 			if (chk->whoTo == NULL) {
 				if (asoc->alternate == NULL) {
 					if (asoc->primary_destination != net) {
 						break;
 					}
 				} else {
 					if (asoc->alternate != net) {
 						break;
 					}
 				}
 			} else {
 				if (chk->whoTo != net) {
 					break;
 				}
 			}
 			if (chk->data == NULL) {
 				break;
 			}
 			if (chk->sent != SCTP_DATAGRAM_UNSENT &&
 			    chk->sent != SCTP_DATAGRAM_RESEND) {
 				break;
 			}
 			/*
 			 * if no AUTH is yet included and this chunk
 			 * requires it, make sure to account for it.  We
 			 * don't apply the size until the AUTH chunk is
 			 * actually added below in case there is no room for
 			 * this chunk. NOTE: we overload the use of "omtu"
 			 * here
 			 */
 			if ((auth == NULL) &&
 			    sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
 							stcb->asoc.peer_auth_chunks)) {
 				omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
 			} else
 				omtu = 0;
 			/* Here we do NOT factor the r_mtu */
 			if ((chk->send_size < (int)(mtu - omtu)) ||
 			    (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
 				/*
 				 * We probably should glom the mbuf chain
 				 * from the chk->data for control but the
 				 * problem is it becomes yet one more level
 				 * of tracking to do if for some reason
 				 * output fails. Then I have got to
 				 * reconstruct the merged control chain.. el
 				 * yucko.. for now we take the easy way and
 				 * do the copy
 				 */
 				/*
 				 * Add an AUTH chunk, if chunk requires it
 				 * save the offset into the chain for AUTH
 				 */
 				if ((auth == NULL) &&
 				    (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
 								 stcb->asoc.peer_auth_chunks))) {
 					outchain = sctp_add_auth_chunk(outchain,
 								       &endoutchain,
 								       &auth,
 								       &auth_offset,
 								       stcb,
 								       chk->rec.chunk_id.id);
 					SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
 				}
 				outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
 							       (int)chk->rec.chunk_id.can_take_data,
 							       chk->send_size, chk->copy_by_ref);
 				if (outchain == NULL) {
 					*reason_code = 8;
 					SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 					return (ENOMEM);
 				}
 				SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
 				/* update our MTU size */
 				if (mtu > (chk->send_size + omtu))
 					mtu -= (chk->send_size + omtu);
 				else
 					mtu = 0;
 				to_out += (chk->send_size + omtu);
 				/* Do clear IP_DF ? */
 				if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
 					no_fragmentflg = 0;
 				}
 				if (chk->rec.chunk_id.can_take_data)
 					chk->data = NULL;
 				/*
 				 * set hb flag since we can
 				 * use these for RTO
 				 */
 				hbflag = 1;
 				asconf = 1;
 				/*
 				 * should sysctl this: don't
 				 * bundle data with ASCONF
 				 * since it requires AUTH
 				 */
 				no_data_chunks = 1;
 				chk->sent = SCTP_DATAGRAM_SENT;
 				if (chk->whoTo == NULL) {
 					chk->whoTo = net;
 					atomic_add_int(&net->ref_count, 1);
 				}
 				chk->snd_count++;
 				if (mtu == 0) {
 					/*
 					 * Ok we are out of room but we can
 					 * output without effecting the
 					 * flight size since this little guy
 					 * is a control only packet.
 					 */
 					sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
 					/*
 					 * do NOT clear the asconf
 					 * flag as it is used to do
 					 * appropriate source address
 					 * selection.
 					 */
 					if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
 					                                        (struct sockaddr *)&net->ro._l_addr,
 					                                        outchain, auth_offset, auth,
 					                                        stcb->asoc.authinfo.active_keyid,
 					                                        no_fragmentflg, 0, asconf,
 					                                        inp->sctp_lport, stcb->rport,
 					                                        htonl(stcb->asoc.peer_vtag),
 					                                        net->port, NULL,
 #if defined(__FreeBSD__)
 , 0,
 #endif
 					                                        so_locked))) {
 						if (error == ENOBUFS) {
 							asoc->ifp_had_enobuf = 1;
 							SCTP_STAT_INCR(sctps_lowlevelerr);
 						}
 						if (from_where == 0) {
 							SCTP_STAT_INCR(sctps_lowlevelerrusr);
 						}
 						if (*now_filled == 0) {
 							(void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
 							*now_filled = 1;
 							*now = net->last_sent_time;
 						} else {
 							net->last_sent_time = *now;
 						}
 						hbflag = 0;
 						/* error, could not output */
 						if (error == EHOSTUNREACH) {
 							/*
 							 * Destination went
 							 * unreachable
 							 * during this send
 							 */
 							sctp_move_chunks_from_net(stcb, net);
 						}
 						*reason_code = 7;
 						continue;
 					} else
 						asoc->ifp_had_enobuf = 0;
 					if (*now_filled == 0) {
 						(void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
 						*now_filled = 1;
 						*now = net->last_sent_time;
 					} else {
 						net->last_sent_time = *now;
 					}
 					hbflag = 0;
 					/*
 					 * increase the number we sent, if a
 					 * cookie is sent we don't tell them
 					 * any was sent out.
 					 */
 					outchain = endoutchain = NULL;
 					auth = NULL;
 					auth_offset = 0;
 					if (!no_out_cnt)
 						*num_out += ctl_cnt;
 					/* recalc a clean slate and setup */
 					switch (net->ro._l_addr.sa.sa_family) {
 #ifdef INET
 						case AF_INET:
 							mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
 							break;
 #endif
 #ifdef INET6
 						case AF_INET6:
 							mtu = net->mtu - SCTP_MIN_OVERHEAD;
 							break;
 #endif
 #if defined(__Userspace__)
 						case AF_CONN:
 							mtu = net->mtu - sizeof(struct sctphdr);
 							break;
 #endif
 						default:
 							/* TSNH */
 							mtu = net->mtu;
 							break;
 					}
 					to_out = 0;
 					no_fragmentflg = 1;
 				}
 			}
 		}
 		/************************/
 		/* Control transmission */
 		/************************/
 		/* Now first lets go through the control queue */
 		TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
 			if ((sack_goes_to) &&
 			    (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
 			    (chk->whoTo != sack_goes_to)) {
 				/*
 				 * if we have a sack in queue, and we are looking at an
 				 * ecn echo that is NOT queued to where the sack is going..
 				 */
 				if (chk->whoTo == net) {
 					/* Don't transmit it to where its going (current net) */
 					continue;
 				} else if (sack_goes_to == net) {
 					/* But do transmit it to this address */
 					goto skip_net_check;
 				}
 			}
 			if (chk->whoTo == NULL) {
 				if (asoc->alternate == NULL) {
 					if (asoc->primary_destination != net) {
 						continue;
 					}
 				} else {
 					if (asoc->alternate != net) {
 						continue;
 					}
 				}
 			} else {
 				if (chk->whoTo != net) {
 					continue;
 				}
 			}
 		skip_net_check:
 			if (chk->data == NULL) {
 				continue;
 			}
 			if (chk->sent != SCTP_DATAGRAM_UNSENT) {
 				/*
 				 * It must be unsent. Cookies and ASCONF's
 				 * hang around but there timers will force
 				 * when marked for resend.
 				 */
 				continue;
 			}
 			/*
 			 * if no AUTH is yet included and this chunk
 			 * requires it, make sure to account for it.  We
 			 * don't apply the size until the AUTH chunk is
 			 * actually added below in case there is no room for
 			 * this chunk. NOTE: we overload the use of "omtu"
 			 * here
 			 */
 			if ((auth == NULL) &&
 			    sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
 							stcb->asoc.peer_auth_chunks)) {
 				omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
 			} else
 				omtu = 0;
 			/* Here we do NOT factor the r_mtu */
 			if ((chk->send_size <= (int)(mtu - omtu)) ||
 			    (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
 				/*
 				 * We probably should glom the mbuf chain
 				 * from the chk->data for control but the
 				 * problem is it becomes yet one more level
 				 * of tracking to do if for some reason
 				 * output fails. Then I have got to
 				 * reconstruct the merged control chain.. el
 				 * yucko.. for now we take the easy way and
 				 * do the copy
 				 */
 				/*
 				 * Add an AUTH chunk, if chunk requires it
 				 * save the offset into the chain for AUTH
 				 */
 				if ((auth == NULL) &&
 				    (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
 								 stcb->asoc.peer_auth_chunks))) {
 					outchain = sctp_add_auth_chunk(outchain,
 								       &endoutchain,
 								       &auth,
 								       &auth_offset,
 								       stcb,
 								       chk->rec.chunk_id.id);
 					SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
 				}
 				outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
 							       (int)chk->rec.chunk_id.can_take_data,
 							       chk->send_size, chk->copy_by_ref);
 				if (outchain == NULL) {
 					*reason_code = 8;
 					SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 					return (ENOMEM);
 				}
 				SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
 				/* update our MTU size */
 				if (mtu > (chk->send_size + omtu))
 					mtu -= (chk->send_size + omtu);
 				else
 					mtu = 0;
 				to_out += (chk->send_size + omtu);
 				/* Do clear IP_DF ? */
 				if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
 					no_fragmentflg = 0;
 				}
 				if (chk->rec.chunk_id.can_take_data)
 					chk->data = NULL;
 				/* Mark things to be removed, if needed */
 				if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
 				    (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
 				    (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
 				    (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
 				    (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
 				    (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
 				    (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
 				    (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
 				    (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
 				    (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
 				    (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
 					if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
 						hbflag = 1;
 					}
 					/* remove these chunks at the end */
 					if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
 					    (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
 						/* turn off the timer */
 						if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
 							sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
 									inp, stcb, net, SCTP_FROM_SCTP_OUTPUT+SCTP_LOC_1);
 						}
 					}
 					ctl_cnt++;
 				} else {
 					/*
 					 * Other chunks, since they have
 					 * timers running (i.e. COOKIE)
 					 * we just "trust" that it
 					 * gets sent or retransmitted.
 					 */
 					ctl_cnt++;
 					if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
 						cookie = 1;
 						no_out_cnt = 1;
 					} else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
 						/*
 						 * Increment ecne send count here
 						 * this means we may be over-zealous in
 						 * our counting if the send fails, but its
 						 * the best place to do it (we used to do
 						 * it in the queue of the chunk, but that did
 						 * not tell how many times it was sent.
 						 */
 						SCTP_STAT_INCR(sctps_sendecne);
 					}
 					chk->sent = SCTP_DATAGRAM_SENT;
 					if (chk->whoTo == NULL) {
 						chk->whoTo = net;
 						atomic_add_int(&net->ref_count, 1);
 					}
 					chk->snd_count++;
 				}
 				if (mtu == 0) {
 					/*
 					 * Ok we are out of room but we can
 					 * output without effecting the
 					 * flight size since this little guy
 					 * is a control only packet.
 					 */
 					if (asconf) {
 						sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
 						/*
 						 * do NOT clear the asconf
 						 * flag as it is used to do
 						 * appropriate source address
 						 * selection.
 						 */
 					}
 					if (cookie) {
 						sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
 						cookie = 0;
 					}
 					if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
 					                                        (struct sockaddr *)&net->ro._l_addr,
 					                                        outchain,
 					                                        auth_offset, auth,
 					                                        stcb->asoc.authinfo.active_keyid,
 					                                        no_fragmentflg, 0, asconf,
 					                                        inp->sctp_lport, stcb->rport,
 					                                        htonl(stcb->asoc.peer_vtag),
 					                                        net->port, NULL,
 #if defined(__FreeBSD__)
 , 0,
 #endif
 					                                        so_locked))) {
 						if (error == ENOBUFS) {
 							asoc->ifp_had_enobuf = 1;
 							SCTP_STAT_INCR(sctps_lowlevelerr);
 						}
 						if (from_where == 0) {
 							SCTP_STAT_INCR(sctps_lowlevelerrusr);
 						}
 						/* error, could not output */
 						if (hbflag) {
 							if (*now_filled == 0) {
 								(void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
 								*now_filled = 1;
 								*now = net->last_sent_time;
 							} else {
 								net->last_sent_time = *now;
 							}
 							hbflag = 0;
 						}
 						if (error == EHOSTUNREACH) {
 							/*
 							 * Destination went
 							 * unreachable
 							 * during this send
 							 */
 							sctp_move_chunks_from_net(stcb, net);
 						}
 						*reason_code = 7;
 						continue;
 					} else
 						asoc->ifp_had_enobuf = 0;
 					/* Only HB or ASCONF advances time */
 					if (hbflag) {
 						if (*now_filled == 0) {
 							(void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
 							*now_filled = 1;
 							*now = net->last_sent_time;
 						} else {
 							net->last_sent_time = *now;
 						}
 						hbflag = 0;
 					}
 					/*
 					 * increase the number we sent, if a
 					 * cookie is sent we don't tell them
 					 * any was sent out.
 					 */
 					outchain = endoutchain = NULL;
 					auth = NULL;
 					auth_offset = 0;
 					if (!no_out_cnt)
 						*num_out += ctl_cnt;
 					/* recalc a clean slate and setup */
 					switch (net->ro._l_addr.sa.sa_family) {
 #ifdef INET
 						case AF_INET:
 							mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
 							break;
 #endif
 #ifdef INET6
 						case AF_INET6:
 							mtu = net->mtu - SCTP_MIN_OVERHEAD;
 							break;
 #endif
 #if defined(__Userspace__)
 						case AF_CONN:
 							mtu = net->mtu - sizeof(struct sctphdr);
 							break;
 #endif
 						default:
 							/* TSNH */
 							mtu = net->mtu;
 							break;
 					}
 					to_out = 0;
 					no_fragmentflg = 1;
 				}
 			}
 		}
 		/* JRI: if dest is in PF state, do not send data to it */
 		if ((asoc->sctp_cmt_on_off > 0) &&
 		    (net != stcb->asoc.alternate) &&
 		    (net->dest_state & SCTP_ADDR_PF)) {
 			goto no_data_fill;
 		}
 		if (net->flight_size >= net->cwnd) {
 			goto no_data_fill;
 		}
 		if ((asoc->sctp_cmt_on_off > 0) &&
 		    (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
 		    (net->flight_size > max_rwnd_per_dest)) {
 			goto no_data_fill;
 		}
 		/*
 		 * We need a specific accounting for the usage of the
 		 * send buffer. We also need to check the number of messages
 		 * per net. For now, this is better than nothing and it
 		 * disabled by default...
 		 */
 		if ((asoc->sctp_cmt_on_off > 0) &&
 		    (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
 		    (max_send_per_dest > 0) &&
 		    (net->flight_size > max_send_per_dest)) {
 			goto no_data_fill;
 		}
 		/*********************/
 		/* Data transmission */
 		/*********************/
 		/*
 		 * if AUTH for DATA is required and no AUTH has been added
 		 * yet, account for this in the mtu now... if no data can be
 		 * bundled, this adjustment won't matter anyways since the
 		 * packet will be going out...
 		 */
 		data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
 							     stcb->asoc.peer_auth_chunks);
 		if (data_auth_reqd && (auth == NULL)) {
 			mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
 		}
 		/* now lets add any data within the MTU constraints */
 		switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
 #ifdef INET
 		case AF_INET:
 			if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr)))
 				omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
 			else
 				omtu = 0;
 			break;
 #endif
 #ifdef INET6
 		case AF_INET6:
 			if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)))
 				omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
 			else
 				omtu = 0;
 			break;
 #endif
 #if defined(__Userspace__)
 		case AF_CONN:
 			if (net->mtu > sizeof(struct sctphdr)) {
 				omtu = net->mtu - sizeof(struct sctphdr);
 			} else {
 				omtu = 0;
 			}
 			break;
 #endif
 		default:
 			/* TSNH */
 			omtu = 0;
 			break;
 		}
 		if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) &&
 		     (skip_data_for_this_net == 0)) ||
 		    (cookie)) {
 			TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
 				if (no_data_chunks) {
 					/* let only control go out */
 					*reason_code = 1;
 					break;
 				}
 				if (net->flight_size >= net->cwnd) {
 					/* skip this net, no room for data */
 					*reason_code = 2;
 					break;
 				}
 				if ((chk->whoTo != NULL) &&
 				    (chk->whoTo != net)) {
 					/* Don't send the chunk on this net */
 					continue;
 				}
 				if (asoc->sctp_cmt_on_off == 0) {
 					if ((asoc->alternate) &&
 					    (asoc->alternate != net) &&
 					    (chk->whoTo == NULL)) {
 						continue;
 					} else if ((net != asoc->primary_destination) &&
 						   (asoc->alternate == NULL) &&
 						   (chk->whoTo == NULL)) {
 						continue;
 					}
 				}
 				if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
 					/*-
 					 * strange, we have a chunk that is
 					 * to big for its destination and
 					 * yet no fragment ok flag.
 					 * Something went wrong when the
 					 * PMTU changed...we did not mark
 					 * this chunk for some reason?? I
 					 * will fix it here by letting IP
 					 * fragment it for now and printing
 					 * a warning. This really should not
 					 * happen ...
 					 */
 					SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
 						    chk->send_size, mtu);
 					chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
 				}
 				if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
 				    ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
 					struct sctp_data_chunk *dchkh;
 					dchkh = mtod(chk->data, struct sctp_data_chunk *);
 					dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
 				}
 				if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
 				    ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
 					/* ok we will add this one */
 					/*
 					 * Add an AUTH chunk, if chunk
 					 * requires it, save the offset into
 					 * the chain for AUTH
 					 */
 					if (data_auth_reqd) {
 						if (auth == NULL) {
 							outchain = sctp_add_auth_chunk(outchain,
 										       &endoutchain,
 										       &auth,
 										       &auth_offset,
 										       stcb,
 										       SCTP_DATA);
 							auth_keyid = chk->auth_keyid;
 							override_ok = 0;
 							SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
 						} else if (override_ok) {
 							/* use this data's keyid */
 							auth_keyid = chk->auth_keyid;
 							override_ok = 0;
 						} else if (auth_keyid != chk->auth_keyid) {
 							/* different keyid, so done bundling */
 							break;
 						}
 					}
 					outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
 								       chk->send_size, chk->copy_by_ref);
 					if (outchain == NULL) {
 						SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
 						if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
 							sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
 						}
 						*reason_code = 3;
 						SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 						return (ENOMEM);
 					}
 					/* upate our MTU size */
 					/* Do clear IP_DF ? */
 					if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
 						no_fragmentflg = 0;
 					}
 					/* unsigned subtraction of mtu */
 					if (mtu > chk->send_size)
 						mtu -= chk->send_size;
 					else
 						mtu = 0;
 					/* unsigned subtraction of r_mtu */
 					if (r_mtu > chk->send_size)
 						r_mtu -= chk->send_size;
 					else
 						r_mtu = 0;
 					to_out += chk->send_size;
 					if ((to_out > mx_mtu) && no_fragmentflg) {
 #ifdef INVARIANTS
 						panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
 #else
 						SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
 							    mx_mtu, to_out);
 #endif
 					}
 					chk->window_probe = 0;
 					data_list[bundle_at++] = chk;
 					if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
 						break;
 					}
 					if (chk->sent == SCTP_DATAGRAM_UNSENT) {
 						if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
 							SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
 						} else {
 							SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
 						}
 						if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
 						    ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
 							/* Count number of user msg's that were fragmented
 							 * we do this by counting when we see a LAST fragment
 							 * only.
 							 */
 							SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
 					}
 					if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
 						if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
 							data_list[0]->window_probe = 1;
 							net->window_probe = 1;
 						}
 						break;
 					}
 				} else {
 					/*
 					 * Must be sent in order of the
 					 * TSN's (on a network)
 					 */
 					break;
 				}
 			}	/* for (chunk gather loop for this net) */
 		}		/* if asoc.state OPEN */
 	no_data_fill:
 		/* Is there something to send for this destination? */
 		if (outchain) {
 			/* We may need to start a control timer or two */
 			if (asconf) {
 				sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
 						 stcb, net);
 				/*
 				 * do NOT clear the asconf flag as it is used
 				 * to do appropriate source address selection.
 				 */
 			}
 			if (cookie) {
 				sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
 				cookie = 0;
 			}
 			/* must start a send timer if data is being sent */
 			if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
 				/*
 				 * no timer running on this destination
 				 * restart it.
 				 */
 				sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
 			}
 			/* Now send it, if there is anything to send :> */
 			if ((error = sctp_lowlevel_chunk_output(inp,
 			                                        stcb,
 			                                        net,
 			                                        (struct sockaddr *)&net->ro._l_addr,
 			                                        outchain,
 			                                        auth_offset,
 			                                        auth,
 			                                        auth_keyid,
 			                                        no_fragmentflg,
 			                                        bundle_at,
 			                                        asconf,
 			                                        inp->sctp_lport, stcb->rport,
 			                                        htonl(stcb->asoc.peer_vtag),
 			                                        net->port, NULL,
 #if defined(__FreeBSD__)
 , 0,
 #endif
 			                                        so_locked))) {
 				/* error, we could not output */
 				if (error == ENOBUFS) {
 					SCTP_STAT_INCR(sctps_lowlevelerr);
 					asoc->ifp_had_enobuf = 1;
 				}
 				if (from_where == 0) {
 					SCTP_STAT_INCR(sctps_lowlevelerrusr);
 				}
 				SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
 				if (hbflag) {
 					if (*now_filled == 0) {
 						(void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
 						*now_filled = 1;
 						*now = net->last_sent_time;
 					} else {
 						net->last_sent_time = *now;
 					}
 					hbflag = 0;
 				}
 				if (error == EHOSTUNREACH) {
 					/*
 					 * Destination went unreachable
 					 * during this send
 					 */
 					sctp_move_chunks_from_net(stcb, net);
 				}
 				*reason_code = 6;
 				/*-
 				 * I add this line to be paranoid. As far as
 				 * I can tell the continue, takes us back to
 				 * the top of the for, but just to make sure
 				 * I will reset these again here.
 				 */
 				ctl_cnt = bundle_at = 0;
 				continue; /* This takes us back to the for() for the nets. */
 			} else {
 				asoc->ifp_had_enobuf = 0;
 			}
 			endoutchain = NULL;
 			auth = NULL;
 			auth_offset = 0;
 			if (bundle_at || hbflag) {
 				/* For data/asconf and hb set time */
 				if (*now_filled == 0) {
 					(void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
 					*now_filled = 1;
 					*now = net->last_sent_time;
 				} else {
 					net->last_sent_time = *now;
 				}
 			}
 			if (!no_out_cnt) {
 				*num_out += (ctl_cnt + bundle_at);
 			}
 			if (bundle_at) {
 				/* setup for a RTO measurement */
 				tsns_sent = data_list[0]->rec.data.TSN_seq;
 				/* fill time if not already filled */
 				if (*now_filled == 0) {
 					(void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
 					*now_filled = 1;
 					*now = asoc->time_last_sent;
 				} else {
 					asoc->time_last_sent = *now;
 				}
 				if (net->rto_needed) {
 					data_list[0]->do_rtt = 1;
 					net->rto_needed = 0;
 				}
 				SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
 				sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
 			}
 			if (one_chunk) {
 				break;
 			}
 		}
 		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
 			sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
 		}
 	}
 	if (old_start_at == NULL) {
 		old_start_at = start_at;
 		start_at = TAILQ_FIRST(&asoc->nets);
 		if (old_start_at)
 			goto again_one_more_time;
 	}
 	/*
 	 * At the end there should be no NON timed chunks hanging on this
 	 * queue.
 	 */
 	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
 		sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
 	}
 	if ((*num_out == 0) && (*reason_code == 0)) {
 		*reason_code = 4;
 	} else {
 		*reason_code = 5;
 	}
 	sctp_clean_up_ctl(stcb, asoc, so_locked);
 	return (0);
 }
 void
 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
 {
 	/*-
 	 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
 	 * the control chunk queue.
 	 */
 	struct sctp_chunkhdr *hdr;
 	struct sctp_tmit_chunk *chk;
 	struct mbuf *mat;
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	sctp_alloc_a_chunk(stcb, chk);
 	if (chk == NULL) {
 		/* no memory */
 		sctp_m_freem(op_err);
 		return;
 	}
 	chk->copy_by_ref = 0;
 	SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
 	if (op_err == NULL) {
 		sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
 		return;
 	}
 	chk->send_size = 0;
 	mat = op_err;
 	while (mat != NULL) {
 		chk->send_size += SCTP_BUF_LEN(mat);
 		mat = SCTP_BUF_NEXT(mat);
 	}
 	chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
 	chk->rec.chunk_id.can_take_data = 1;
 	chk->sent = SCTP_DATAGRAM_UNSENT;
 	chk->snd_count = 0;
 	chk->flags = 0;
 	chk->asoc = &stcb->asoc;
 	chk->data = op_err;
 	chk->whoTo = NULL;
 	hdr = mtod(op_err, struct sctp_chunkhdr *);
 	hdr->chunk_type = SCTP_OPERATION_ERROR;
 	hdr->chunk_flags = 0;
 	hdr->chunk_length = htons(chk->send_size);
 	TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue,
 	    chk,
 	    sctp_next);
 	chk->asoc->ctrl_queue_cnt++;
 }
 int
 sctp_send_cookie_echo(struct mbuf *m,
     int offset,
     struct sctp_tcb *stcb,
     struct sctp_nets *net)
 {
 	/*-
 	 * pull out the cookie and put it at the front of the control chunk
 	 * queue.
 	 */
 	int at;
 	struct mbuf *cookie;
 	struct sctp_paramhdr parm, *phdr;
 	struct sctp_chunkhdr *hdr;
 	struct sctp_tmit_chunk *chk;
 	uint16_t ptype, plen;
 	/* First find the cookie in the param area */
 	cookie = NULL;
 	at = offset + sizeof(struct sctp_init_chunk);
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	do {
 		phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
 		if (phdr == NULL) {
 			return (-3);
 		}
 		ptype = ntohs(phdr->param_type);
 		plen = ntohs(phdr->param_length);
 		if (ptype == SCTP_STATE_COOKIE) {
 			int pad;
 			/* found the cookie */
 			if ((pad = (plen % 4))) {
 				plen += 4 - pad;
 			}
 			cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
 			if (cookie == NULL) {
 				/* No memory */
 				return (-2);
 			}
 #ifdef SCTP_MBUF_LOGGING
 			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
 				struct mbuf *mat;
 				for (mat = cookie; mat; mat = SCTP_BUF_NEXT(mat)) {
 					if (SCTP_BUF_IS_EXTENDED(mat)) {
 						sctp_log_mb(mat, SCTP_MBUF_ICOPY);
 					}
 				}
 			}
 #endif
 			break;
 		}
 		at += SCTP_SIZE32(plen);
 	} while (phdr);
 	if (cookie == NULL) {
 		/* Did not find the cookie */
 		return (-3);
 	}
 	/* ok, we got the cookie lets change it into a cookie echo chunk */
 	/* first the change from param to cookie */
 	hdr = mtod(cookie, struct sctp_chunkhdr *);
 	hdr->chunk_type = SCTP_COOKIE_ECHO;
 	hdr->chunk_flags = 0;
 	/* get the chunk stuff now and place it in the FRONT of the queue */
 	sctp_alloc_a_chunk(stcb, chk);
 	if (chk == NULL) {
 		/* no memory */
 		sctp_m_freem(cookie);
 		return (-5);
 	}
 	chk->copy_by_ref = 0;
 	chk->send_size = plen;
 	chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
 	chk->rec.chunk_id.can_take_data = 0;
 	chk->sent = SCTP_DATAGRAM_UNSENT;
 	chk->snd_count = 0;
 	chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
 	chk->asoc = &stcb->asoc;
 	chk->data = cookie;
 	chk->whoTo = net;
 	atomic_add_int(&chk->whoTo->ref_count, 1);
 	TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
 	chk->asoc->ctrl_queue_cnt++;
 	return (0);
 }
 void
 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
     struct mbuf *m,
     int offset,
     int chk_length,
     struct sctp_nets *net)
 {
 	/*
 	 * take a HB request and make it into a HB ack and send it.
 	 */
 	struct mbuf *outchain;
 	struct sctp_chunkhdr *chdr;
 	struct sctp_tmit_chunk *chk;
 	if (net == NULL)
 		/* must have a net pointer */
 		return;
 	outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
 	if (outchain == NULL) {
 		/* gak out of memory */
 		return;
 	}
 #ifdef SCTP_MBUF_LOGGING
 	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
 		struct mbuf *mat;
 		for (mat = outchain; mat; mat = SCTP_BUF_NEXT(mat)) {
 			if (SCTP_BUF_IS_EXTENDED(mat)) {
 				sctp_log_mb(mat, SCTP_MBUF_ICOPY);
 			}
 		}
 	}
 #endif
 	chdr = mtod(outchain, struct sctp_chunkhdr *);
 	chdr->chunk_type = SCTP_HEARTBEAT_ACK;
 	chdr->chunk_flags = 0;
 	if (chk_length % 4) {
 		/* need pad */
 		uint32_t cpthis = 0;
 		int padlen;
 		padlen = 4 - (chk_length % 4);
 		m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
 	}
 	sctp_alloc_a_chunk(stcb, chk);
 	if (chk == NULL) {
 		/* no memory */
 		sctp_m_freem(outchain);
 		return;
 	}
 	chk->copy_by_ref = 0;
 	chk->send_size = chk_length;
 	chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
 	chk->rec.chunk_id.can_take_data = 1;
 	chk->sent = SCTP_DATAGRAM_UNSENT;
 	chk->snd_count = 0;
 	chk->flags = 0;
 	chk->asoc = &stcb->asoc;
 	chk->data = outchain;
 	chk->whoTo = net;
 	atomic_add_int(&chk->whoTo->ref_count, 1);
 	TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
 	chk->asoc->ctrl_queue_cnt++;
 }
 void
 sctp_send_cookie_ack(struct sctp_tcb *stcb)
 {
 	/* formulate and queue a cookie-ack back to sender */
 	struct mbuf *cookie_ack;
 	struct sctp_chunkhdr *hdr;
 	struct sctp_tmit_chunk *chk;
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
 	if (cookie_ack == NULL) {
 		/* no mbuf's */
 		return;
 	}
 	SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
 	sctp_alloc_a_chunk(stcb, chk);
 	if (chk == NULL) {
 		/* no memory */
 		sctp_m_freem(cookie_ack);
 		return;
 	}
 	chk->copy_by_ref = 0;
 	chk->send_size = sizeof(struct sctp_chunkhdr);
 	chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
 	chk->rec.chunk_id.can_take_data = 1;
 	chk->sent = SCTP_DATAGRAM_UNSENT;
 	chk->snd_count = 0;
 	chk->flags = 0;
 	chk->asoc = &stcb->asoc;
 	chk->data = cookie_ack;
 	if (chk->asoc->last_control_chunk_from != NULL) {
 		chk->whoTo = chk->asoc->last_control_chunk_from;
 		atomic_add_int(&chk->whoTo->ref_count, 1);
 	} else {
 		chk->whoTo = NULL;
 	}
 	hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
 	hdr->chunk_type = SCTP_COOKIE_ACK;
 	hdr->chunk_flags = 0;
 	hdr->chunk_length = htons(chk->send_size);
 	SCTP_BUF_LEN(cookie_ack) = chk->send_size;
 	TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
 	chk->asoc->ctrl_queue_cnt++;
 	return;
 }
 void
 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
 {
 	/* formulate and queue a SHUTDOWN-ACK back to the sender */
 	struct mbuf *m_shutdown_ack;
 	struct sctp_shutdown_ack_chunk *ack_cp;
 	struct sctp_tmit_chunk *chk;
 	m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
 	if (m_shutdown_ack == NULL) {
 		/* no mbuf's */
 		return;
 	}
 	SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
 	sctp_alloc_a_chunk(stcb, chk);
 	if (chk == NULL) {
 		/* no memory */
 		sctp_m_freem(m_shutdown_ack);
 		return;
 	}
 	chk->copy_by_ref = 0;
 	chk->send_size = sizeof(struct sctp_chunkhdr);
 	chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
 	chk->rec.chunk_id.can_take_data = 1;
 	chk->sent = SCTP_DATAGRAM_UNSENT;
 	chk->snd_count = 0;
 	chk->flags = 0;
 	chk->asoc = &stcb->asoc;
 	chk->data = m_shutdown_ack;
 	chk->whoTo = net;
 	if (chk->whoTo) {
 		atomic_add_int(&chk->whoTo->ref_count, 1);
 	}
 	ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
 	ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
 	ack_cp->ch.chunk_flags = 0;
 	ack_cp->ch.chunk_length = htons(chk->send_size);
 	SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
 	TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
 	chk->asoc->ctrl_queue_cnt++;
 	return;
 }
 void
 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
 {
 	/* formulate and queue a SHUTDOWN to the sender */
 	struct mbuf *m_shutdown;
 	struct sctp_shutdown_chunk *shutdown_cp;
 	struct sctp_tmit_chunk *chk;
 	m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
 	if (m_shutdown == NULL) {
 		/* no mbuf's */
 		return;
 	}
 	SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
 	sctp_alloc_a_chunk(stcb, chk);
 	if (chk == NULL) {
 		/* no memory */
 		sctp_m_freem(m_shutdown);
 		return;
 	}
 	chk->copy_by_ref = 0;
 	chk->send_size = sizeof(struct sctp_shutdown_chunk);
 	chk->rec.chunk_id.id = SCTP_SHUTDOWN;
 	chk->rec.chunk_id.can_take_data = 1;
 	chk->sent = SCTP_DATAGRAM_UNSENT;
 	chk->snd_count = 0;
 	chk->flags = 0;
 	chk->asoc = &stcb->asoc;
 	chk->data = m_shutdown;
 	chk->whoTo = net;
 	if (chk->whoTo) {
 		atomic_add_int(&chk->whoTo->ref_count, 1);
 	}
 	shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
 	shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
 	shutdown_cp->ch.chunk_flags = 0;
 	shutdown_cp->ch.chunk_length = htons(chk->send_size);
 	shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
 	SCTP_BUF_LEN(m_shutdown) = chk->send_size;
 	TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
 	chk->asoc->ctrl_queue_cnt++;
 	return;
 }
 void
 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
 {
 	/*
 	 * formulate and queue an ASCONF to the peer.
 	 * ASCONF parameters should be queued on the assoc queue.
 	 */
 	struct sctp_tmit_chunk *chk;
 	struct mbuf *m_asconf;
 	int len;
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
 	    (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
 		/* can't send a new one if there is one in flight already */
 		return;
 	}
 	/* compose an ASCONF chunk, maximum length is PMTU */
 	m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
 	if (m_asconf == NULL) {
 		return;
 	}
 	sctp_alloc_a_chunk(stcb, chk);
 	if (chk == NULL) {
 		/* no memory */
 		sctp_m_freem(m_asconf);
 		return;
 	}
 	chk->copy_by_ref = 0;
 	chk->data = m_asconf;
 	chk->send_size = len;
 	chk->rec.chunk_id.id = SCTP_ASCONF;
 	chk->rec.chunk_id.can_take_data = 0;
 	chk->sent = SCTP_DATAGRAM_UNSENT;
 	chk->snd_count = 0;
 	chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
 	chk->asoc = &stcb->asoc;
 	chk->whoTo = net;
 	if (chk->whoTo) {
 		atomic_add_int(&chk->whoTo->ref_count, 1);
 	}
 	TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
 	chk->asoc->ctrl_queue_cnt++;
 	return;
 }
 void
 sctp_send_asconf_ack(struct sctp_tcb *stcb)
 {
 	/*
 	 * formulate and queue a asconf-ack back to sender.
 	 * the asconf-ack must be stored in the tcb.
 	 */
 	struct sctp_tmit_chunk *chk;
 	struct sctp_asconf_ack *ack, *latest_ack;
 	struct mbuf *m_ack;
 	struct sctp_nets *net = NULL;
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	/* Get the latest ASCONF-ACK */
 	latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
 	if (latest_ack == NULL) {
 		return;
 	}
 	if (latest_ack->last_sent_to != NULL &&
 	    latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
 		/* we're doing a retransmission */
 		net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
 		if (net == NULL) {
 			/* no alternate */
 			if (stcb->asoc.last_control_chunk_from == NULL) {
 				if (stcb->asoc.alternate) {
 					net = stcb->asoc.alternate;
 				} else {
 					net = stcb->asoc.primary_destination;
 				}
 			} else {
 				net = stcb->asoc.last_control_chunk_from;
 			}
 		}
 	} else {
 		/* normal case */
 		if (stcb->asoc.last_control_chunk_from == NULL) {
 			if (stcb->asoc.alternate) {
 				net = stcb->asoc.alternate;
 			} else {
 				net = stcb->asoc.primary_destination;
 			}
 		} else {
 			net = stcb->asoc.last_control_chunk_from;
 		}
 	}
 	latest_ack->last_sent_to = net;
 	TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
 		if (ack->data == NULL) {
 			continue;
 		}
 		/* copy the asconf_ack */
 		m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
 		if (m_ack == NULL) {
 			/* couldn't copy it */
 			return;
 		}
 #ifdef SCTP_MBUF_LOGGING
 		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
 			struct mbuf *mat;
 			for (mat = m_ack; mat; mat = SCTP_BUF_NEXT(mat)) {
 				if (SCTP_BUF_IS_EXTENDED(mat)) {
 					sctp_log_mb(mat, SCTP_MBUF_ICOPY);
 				}
 			}
 		}
 #endif
 		sctp_alloc_a_chunk(stcb, chk);
 		if (chk == NULL) {
 			/* no memory */
 			if (m_ack)
 				sctp_m_freem(m_ack);
 			return;
 		}
 		chk->copy_by_ref = 0;
 		chk->whoTo = net;
 		if (chk->whoTo) {
 			atomic_add_int(&chk->whoTo->ref_count, 1);
 		}
 		chk->data = m_ack;
 		chk->send_size = 0;
 		/* Get size */
 		chk->send_size = ack->len;
 		chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
 		chk->rec.chunk_id.can_take_data = 1;
 		chk->sent = SCTP_DATAGRAM_UNSENT;
 		chk->snd_count = 0;
 		chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; /* XXX */
 		chk->asoc = &stcb->asoc;
 		TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
 		chk->asoc->ctrl_queue_cnt++;
 	}
 	return;
 }
 static int
 sctp_chunk_retransmission(struct sctp_inpcb *inp,
     struct sctp_tcb *stcb,
     struct sctp_association *asoc,
     int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
 #endif
     )
 {
 	/*-
 	 * send out one MTU of retransmission. If fast_retransmit is
 	 * happening we ignore the cwnd. Otherwise we obey the cwnd and
 	 * rwnd. For a Cookie or Asconf in the control chunk queue we
 	 * retransmit them by themselves.
 	 *
 	 * For data chunks we will pick out the lowest TSN's in the sent_queue
 	 * marked for resend and bundle them all together (up to a MTU of
 	 * destination). The address to send to should have been
 	 * selected/changed where the retransmission was marked (i.e. in FR
 	 * or t3-timeout routines).
 	 */
 	struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
 	struct sctp_tmit_chunk *chk, *fwd;
 	struct mbuf *m, *endofchain;
 	struct sctp_nets *net = NULL;
 	uint32_t tsns_sent = 0;
 	int no_fragmentflg, bundle_at, cnt_thru;
 	unsigned int mtu;
 	int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
 	struct sctp_auth_chunk *auth = NULL;
 	uint32_t auth_offset = 0;
 	uint16_t auth_keyid;
 	int override_ok = 1;
 	int data_auth_reqd = 0;
 	uint32_t dmtu = 0;
 #if defined(__APPLE__)
 	if (so_locked) {
 		sctp_lock_assert(SCTP_INP_SO(inp));
 	} else {
 		sctp_unlock_assert(SCTP_INP_SO(inp));
 	}
 #endif
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	tmr_started = ctl_cnt = bundle_at = error = 0;
 	no_fragmentflg = 1;
 	fwd_tsn = 0;
 	*cnt_out = 0;
 	fwd = NULL;
 	endofchain = m = NULL;
 	auth_keyid = stcb->asoc.authinfo.active_keyid;
 #ifdef SCTP_AUDITING_ENABLED
 	sctp_audit_log(0xC3, 1);
 #endif
 	if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
 	    (TAILQ_EMPTY(&asoc->control_send_queue))) {
 		SCTPDBG(SCTP_DEBUG_OUTPUT1,"SCTP hits empty queue with cnt set to %d?\n",
 			asoc->sent_queue_retran_cnt);
 		asoc->sent_queue_cnt = 0;
 		asoc->sent_queue_cnt_removeable = 0;
 		/* send back 0/0 so we enter normal transmission */
 		*cnt_out = 0;
 		return (0);
 	}
 	TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
 		if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
 		    (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
 		    (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
 			if (chk->sent != SCTP_DATAGRAM_RESEND) {
 				continue;
 			}
 			if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
 				if (chk != asoc->str_reset) {
 					/*
 					 * not eligible for retran if its
 					 * not ours
 					 */
 					continue;
 				}
 			}
 			ctl_cnt++;
 			if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
 				fwd_tsn = 1;
 			}
 			/*
 			 * Add an AUTH chunk, if chunk requires it save the
 			 * offset into the chain for AUTH
 			 */
 			if ((auth == NULL) &&
 			    (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
 							 stcb->asoc.peer_auth_chunks))) {
 				m = sctp_add_auth_chunk(m, &endofchain,
 							&auth, &auth_offset,
 							stcb,
 							chk->rec.chunk_id.id);
 				SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
 			}
 			m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
 			break;
 		}
 	}
 	one_chunk = 0;
 	cnt_thru = 0;
 	/* do we have control chunks to retransmit? */
 	if (m != NULL) {
 		/* Start a timer no matter if we suceed or fail */
 		if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
 			sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
 		} else if (chk->rec.chunk_id.id == SCTP_ASCONF)
 			sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
 		chk->snd_count++;	/* update our count */
 		if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
 		                                        (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
 		                                        auth_offset, auth, stcb->asoc.authinfo.active_keyid,
 		                                        no_fragmentflg, 0, 0,
 		                                        inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
 		                                        chk->whoTo->port, NULL,
 #if defined(__FreeBSD__)
 , 0,
 #endif
 		                                        so_locked))) {
 			SCTP_STAT_INCR(sctps_lowlevelerr);
 			return (error);
 		}
 		endofchain = NULL;
 		auth = NULL;
 		auth_offset = 0;
 		/*
 		 * We don't want to mark the net->sent time here since this
 		 * we use this for HB and retrans cannot measure RTT
 		 */
 		/* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
 		*cnt_out += 1;
 		chk->sent = SCTP_DATAGRAM_SENT;
 		sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
 		if (fwd_tsn == 0) {
 			return (0);
 		} else {
 			/* Clean up the fwd-tsn list */
 			sctp_clean_up_ctl(stcb, asoc, so_locked);
 			return (0);
 		}
 	}
 	/*
 	 * Ok, it is just data retransmission we need to do or that and a
 	 * fwd-tsn with it all.
 	 */
 	if (TAILQ_EMPTY(&asoc->sent_queue)) {
 		return (SCTP_RETRAN_DONE);
 	}
 	if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
 	    (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
 		/* not yet open, resend the cookie and that is it */
 		return (1);
 	}
 #ifdef SCTP_AUDITING_ENABLED
 	sctp_auditing(20, inp, stcb, NULL);
 #endif
 	data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
 	TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
 		if (chk->sent != SCTP_DATAGRAM_RESEND) {
 			/* No, not sent to this net or not ready for rtx */
 			continue;
 		}
 		if (chk->data == NULL) {
 			SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
 			            chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
 			continue;
 		}
 		if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
 		    (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
 			/* Gak, we have exceeded max unlucky retran, abort! */
 			SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n",
 				    chk->snd_count,
 				    SCTP_BASE_SYSCTL(sctp_max_retran_chunk));
 			atomic_add_int(&stcb->asoc.refcnt, 1);
 			sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, so_locked);
 			SCTP_TCB_LOCK(stcb);
 			atomic_subtract_int(&stcb->asoc.refcnt, 1);
 			return (SCTP_RETRAN_EXIT);
 		}
 		/* pick up the net */
 		net = chk->whoTo;
 		switch (net->ro._l_addr.sa.sa_family) {
 #ifdef INET
 			case AF_INET:
 				mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
 				break;
 #endif
 #ifdef INET6
 			case AF_INET6:
 				mtu = net->mtu - SCTP_MIN_OVERHEAD;
 				break;
 #endif
 #if defined(__Userspace__)
 			case AF_CONN:
 				mtu = net->mtu - sizeof(struct sctphdr);
 				break;
 #endif
 			default:
 				/* TSNH */
 				mtu = net->mtu;
 				break;
 		}
 		if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
 			/* No room in peers rwnd */
 			uint32_t tsn;
 			tsn = asoc->last_acked_seq + 1;
 			if (tsn == chk->rec.data.TSN_seq) {
 				/*
 				 * we make a special exception for this
 				 * case. The peer has no rwnd but is missing
 				 * the lowest chunk.. which is probably what
 				 * is holding up the rwnd.
 				 */
 				goto one_chunk_around;
 			}
 			return (1);
 		}
 	one_chunk_around:
 		if (asoc->peers_rwnd < mtu) {
 			one_chunk = 1;
 			if ((asoc->peers_rwnd == 0) &&
 			    (asoc->total_flight == 0)) {
 				chk->window_probe = 1;
 				chk->whoTo->window_probe = 1;
 			}
 		}
 #ifdef SCTP_AUDITING_ENABLED
 		sctp_audit_log(0xC3, 2);
 #endif
 		bundle_at = 0;
 		m = NULL;
 		net->fast_retran_ip = 0;
 		if (chk->rec.data.doing_fast_retransmit == 0) {
 			/*
 			 * if no FR in progress skip destination that have
 			 * flight_size > cwnd.
 			 */
 			if (net->flight_size >= net->cwnd) {
 				continue;
 			}
 		} else {
 			/*
 			 * Mark the destination net to have FR recovery
 			 * limits put on it.
 			 */
 			*fr_done = 1;
 			net->fast_retran_ip = 1;
 		}
 		/*
 		 * if no AUTH is yet included and this chunk requires it,
 		 * make sure to account for it.  We don't apply the size
 		 * until the AUTH chunk is actually added below in case
 		 * there is no room for this chunk.
 		 */
 		if (data_auth_reqd && (auth == NULL)) {
 			dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
 		} else
 			dmtu = 0;
 		if ((chk->send_size <= (mtu - dmtu)) ||
 		    (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
 			/* ok we will add this one */
 			if (data_auth_reqd) {
 				if (auth == NULL) {
 					m = sctp_add_auth_chunk(m,
 								&endofchain,
 								&auth,
 								&auth_offset,
 								stcb,
 								SCTP_DATA);
 					auth_keyid = chk->auth_keyid;
 					override_ok = 0;
 					SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
 				} else if (override_ok) {
 					auth_keyid = chk->auth_keyid;
 					override_ok = 0;
 				} else if (chk->auth_keyid != auth_keyid) {
 					/* different keyid, so done bundling */
 					break;
 				}
 			}
 			m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
 			if (m == NULL) {
 				SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 				return (ENOMEM);
 			}
 			/* Do clear IP_DF ? */
 			if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
 				no_fragmentflg = 0;
 			}
 			/* upate our MTU size */
 			if (mtu > (chk->send_size + dmtu))
 				mtu -= (chk->send_size + dmtu);
 			else
 				mtu = 0;
 			data_list[bundle_at++] = chk;
 			if (one_chunk && (asoc->total_flight <= 0)) {
 				SCTP_STAT_INCR(sctps_windowprobed);
 			}
 		}
 		if (one_chunk == 0) {
 			/*
 			 * now are there anymore forward from chk to pick
 			 * up?
 			 */
 			for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
 				if (fwd->sent != SCTP_DATAGRAM_RESEND) {
 					/* Nope, not for retran */
 					continue;
 				}
 				if (fwd->whoTo != net) {
 					/* Nope, not the net in question */
 					continue;
 				}
 				if (data_auth_reqd && (auth == NULL)) {
 					dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
 				} else
 					dmtu = 0;
 				if (fwd->send_size <= (mtu - dmtu)) {
 					if (data_auth_reqd) {
 						if (auth == NULL) {
 							m = sctp_add_auth_chunk(m,
 										&endofchain,
 										&auth,
 										&auth_offset,
 										stcb,
 										SCTP_DATA);
 							auth_keyid = fwd->auth_keyid;
 							override_ok = 0;
 							SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
 						} else if (override_ok) {
 							auth_keyid = fwd->auth_keyid;
 							override_ok = 0;
 						} else if (fwd->auth_keyid != auth_keyid) {
 							/* different keyid, so done bundling */
 							break;
 						}
 					}
 					m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
 					if (m == NULL) {
 						SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 						return (ENOMEM);
 					}
 					/* Do clear IP_DF ? */
 					if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
 						no_fragmentflg = 0;
 					}
 					/* upate our MTU size */
 					if (mtu > (fwd->send_size + dmtu))
 						mtu -= (fwd->send_size + dmtu);
 					else
 						mtu = 0;
 					data_list[bundle_at++] = fwd;
 					if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
 						break;
 					}
 				} else {
 					/* can't fit so we are done */
 					break;
 				}
 			}
 		}
 		/* Is there something to send for this destination? */
 		if (m) {
 			/*
 			 * No matter if we fail/or suceed we should start a
 			 * timer. A failure is like a lost IP packet :-)
 			 */
 			if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
 				/*
 				 * no timer running on this destination
 				 * restart it.
 				 */
 				sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
 				tmr_started = 1;
 			}
 			/* Now lets send it, if there is anything to send :> */
 			if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
 			                                        (struct sockaddr *)&net->ro._l_addr, m,
 			                                        auth_offset, auth, auth_keyid,
 			                                        no_fragmentflg, 0, 0,
 			                                        inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
 			                                        net->port, NULL,
 #if defined(__FreeBSD__)
 , 0,
 #endif
 			                                        so_locked))) {
 				/* error, we could not output */
 				SCTP_STAT_INCR(sctps_lowlevelerr);
 				return (error);
 			}
 			endofchain = NULL;
 			auth = NULL;
 			auth_offset = 0;
 			/* For HB's */
 			/*
 			 * We don't want to mark the net->sent time here
 			 * since this we use this for HB and retrans cannot
 			 * measure RTT
 			 */
 			/* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
 			/* For auto-close */
 			cnt_thru++;
 			if (*now_filled == 0) {
 				(void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
 				*now = asoc->time_last_sent;
 				*now_filled = 1;
 			} else {
 				asoc->time_last_sent = *now;
 			}
 			*cnt_out += bundle_at;
 #ifdef SCTP_AUDITING_ENABLED
 			sctp_audit_log(0xC4, bundle_at);
 #endif
 			if (bundle_at) {
 				tsns_sent = data_list[0]->rec.data.TSN_seq;
 			}
 			for (i = 0; i < bundle_at; i++) {
 				SCTP_STAT_INCR(sctps_sendretransdata);
 				data_list[i]->sent = SCTP_DATAGRAM_SENT;
 				/*
 				 * When we have a revoked data, and we
 				 * retransmit it, then we clear the revoked
 				 * flag since this flag dictates if we
 				 * subtracted from the fs
 				 */
 				if (data_list[i]->rec.data.chunk_was_revoked) {
 					/* Deflate the cwnd */
 					data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
 					data_list[i]->rec.data.chunk_was_revoked = 0;
 				}
 				data_list[i]->snd_count++;
 				sctp_ucount_decr(asoc->sent_queue_retran_cnt);
 				/* record the time */
 				data_list[i]->sent_rcv_time = asoc->time_last_sent;
 				if (data_list[i]->book_size_scale) {
 					/*
 					 * need to double the book size on
 					 * this one
 					 */
 					data_list[i]->book_size_scale = 0;
 					/* Since we double the booksize, we must
 					 * also double the output queue size, since this
 					 * get shrunk when we free by this amount.
 					 */
 					atomic_add_int(&((asoc)->total_output_queue_size),data_list[i]->book_size);
 					data_list[i]->book_size *= 2;
 				} else {
 					if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
 						sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
 						      asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
 					}
 					asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
 									    (uint32_t) (data_list[i]->send_size +
 											SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
 				}
 				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
 					sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
 						       data_list[i]->whoTo->flight_size,
 						       data_list[i]->book_size,
 						       (uintptr_t)data_list[i]->whoTo,
 						       data_list[i]->rec.data.TSN_seq);
 				}
 				sctp_flight_size_increase(data_list[i]);
 				sctp_total_flight_increase(stcb, data_list[i]);
 				if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
 					/* SWS sender side engages */
 					asoc->peers_rwnd = 0;
 				}
 				if ((i == 0) &&
 				    (data_list[i]->rec.data.doing_fast_retransmit)) {
 					SCTP_STAT_INCR(sctps_sendfastretrans);
 					if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
 					    (tmr_started == 0)) {
 						/*-
 						 * ok we just fast-retrans'd
 						 * the lowest TSN, i.e the
 						 * first on the list. In
 						 * this case we want to give
 						 * some more time to get a
 						 * SACK back without a
 						 * t3-expiring.
 						 */
 						sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
 								SCTP_FROM_SCTP_OUTPUT+SCTP_LOC_4);
 						sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
 					}
 				}
 			}
 			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
 				sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
 			}
 #ifdef SCTP_AUDITING_ENABLED
 			sctp_auditing(21, inp, stcb, NULL);
 #endif
 		} else {
 			/* None will fit */
 			return (1);
 		}
 		if (asoc->sent_queue_retran_cnt <= 0) {
 			/* all done we have no more to retran */
 			asoc->sent_queue_retran_cnt = 0;
 			break;
 		}
 		if (one_chunk) {
 			/* No more room in rwnd */
 			return (1);
 		}
 		/* stop the for loop here. we sent out a packet */
 		break;
 	}
 	return (0);
 }
 static void
 sctp_timer_validation(struct sctp_inpcb *inp,
     struct sctp_tcb *stcb,
     struct sctp_association *asoc)
 {
 	struct sctp_nets *net;
 	/* Validate that a timer is running somewhere */
 	TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
 		if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
 			/* Here is a timer */
 			return;
 		}
 	}
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	/* Gak, we did not have a timer somewhere */
 	SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
 	if (asoc->alternate) {
 		sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
 	} else {
 		sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
 	}
 	return;
 }
 void
 sctp_chunk_output (struct sctp_inpcb *inp,
     struct sctp_tcb *stcb,
     int from_where,
     int so_locked
 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
 #endif
     )
 {
 	/*-
 	 * Ok this is the generic chunk service queue. we must do the
 	 * following:
 	 * - See if there are retransmits pending, if so we must
 	 *   do these first.
 	 * - Service the stream queue that is next, moving any
 	 *   message (note I must get a complete message i.e.
 	 *   FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
 	 *   TSN's
 	 * - Check to see if the cwnd/rwnd allows any output, if so we
 	 *   go ahead and fomulate and send the low level chunks. Making sure
 	 *   to combine any control in the control chunk queue also.
 	 */
 	struct sctp_association *asoc;
 	struct sctp_nets *net;
 	int error = 0, num_out = 0, tot_out = 0, ret = 0, reason_code = 0;
 	unsigned int burst_cnt = 0;
 	struct timeval now;
 	int now_filled = 0;
 	int nagle_on;
 	int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
 	int un_sent = 0;
 	int fr_done;
 	unsigned int tot_frs = 0;
 #if defined(__APPLE__)
 	if (so_locked) {
 		sctp_lock_assert(SCTP_INP_SO(inp));
 	} else {
 		sctp_unlock_assert(SCTP_INP_SO(inp));
 	}
 #endif
 	asoc = &stcb->asoc;
 	/* The Nagle algorithm is only applied when handling a send call. */
 	if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
 		if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
 			nagle_on = 0;
 		} else {
 			nagle_on = 1;
 		}
 	} else {
 		nagle_on = 0;
 	}
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
 	if ((un_sent <= 0) &&
 	    (TAILQ_EMPTY(&asoc->control_send_queue)) &&
 	    (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
 	    (asoc->sent_queue_retran_cnt == 0)) {
 		/* Nothing to do unless there is something to be sent left */
 		return;
 	}
 	/* Do we have something to send, data or control AND
 	 * a sack timer running, if so piggy-back the sack.
 	 */
  	if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
 		sctp_send_sack(stcb, so_locked);
 		(void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
 	}
 	while (asoc->sent_queue_retran_cnt) {
 		/*-
 		 * Ok, it is retransmission time only, we send out only ONE
 		 * packet with a single call off to the retran code.
 		 */
 		if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
 			/*-
 			 * Special hook for handling cookiess discarded
 			 * by peer that carried data. Send cookie-ack only
 			 * and then the next call with get the retran's.
 			 */
  			(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
 						    from_where,
 						    &now, &now_filled, frag_point, so_locked);
 			return;
 		} else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
 			/* if its not from a HB then do it */
 			fr_done = 0;
 			ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
 			if (fr_done) {
 				tot_frs++;
 			}
 		} else {
 			/*
 			 * its from any other place, we don't allow retran
 			 * output (only control)
 			 */
 			ret = 1;
 		}
 		if (ret > 0) {
 			/* Can't send anymore */
 			/*-
 			 * now lets push out control by calling med-level
 			 * output once. this assures that we WILL send HB's
 			 * if queued too.
 			 */
 			(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
 						    from_where,
 						    &now, &now_filled, frag_point, so_locked);
 #ifdef SCTP_AUDITING_ENABLED
 			sctp_auditing(8, inp, stcb, NULL);
 #endif
 			sctp_timer_validation(inp, stcb, asoc);
 			return;
 		}
 		if (ret < 0) {
 			/*-
 			 * The count was off.. retran is not happening so do
 			 * the normal retransmission.
 			 */
 #ifdef SCTP_AUDITING_ENABLED
 			sctp_auditing(9, inp, stcb, NULL);
 #endif
 			if (ret == SCTP_RETRAN_EXIT) {
 				return;
 			}
 			break;
 		}
 		if (from_where == SCTP_OUTPUT_FROM_T3) {
 			/* Only one transmission allowed out of a timeout */
 #ifdef SCTP_AUDITING_ENABLED
 			sctp_auditing(10, inp, stcb, NULL);
 #endif
 			/* Push out any control */
 			(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
 						    &now, &now_filled, frag_point, so_locked);
 			return;
 		}
 		if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
 			/* Hit FR burst limit */
 			return;
 		}
 		if ((num_out == 0) && (ret == 0)) {
 			/* No more retrans to send */
 			break;
 		}
 	}
 #ifdef SCTP_AUDITING_ENABLED
 	sctp_auditing(12, inp, stcb, NULL);
 #endif
 	/* Check for bad destinations, if they exist move chunks around. */
 	TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
 		if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
 			/*-
 			 * if possible move things off of this address we
 			 * still may send below due to the dormant state but
 			 * we try to find an alternate address to send to
 			 * and if we have one we move all queued data on the
 			 * out wheel to this alternate address.
 			 */
 			if (net->ref_count > 1)
 				sctp_move_chunks_from_net(stcb, net);
 		} else {
 			/*-
 			 * if ((asoc->sat_network) || (net->addr_is_local))
 			 * { burst_limit = asoc->max_burst *
 			 * SCTP_SAT_NETWORK_BURST_INCR; }
 			 */
 			if (asoc->max_burst > 0) {
 				if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
 					if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
 						/* JRS - Use the congestion control given in the congestion control module */
 						asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
 						if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
 							sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
 						}
 						SCTP_STAT_INCR(sctps_maxburstqueued);
 					}
 					net->fast_retran_ip = 0;
 				} else {
 					if (net->flight_size == 0) {
 						/* Should be decaying the cwnd here */
 						;
 					}
 				}
 			}
 		}
 	}
 	burst_cnt = 0;
 	do {
 		error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
 					      &reason_code, 0, from_where,
 					      &now, &now_filled, frag_point, so_locked);
 		if (error) {
 			SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
 			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
 				sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
 			}
 			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
 				sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
 				sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
 			}
 			break;
 		}
 		SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
 		tot_out += num_out;
 		burst_cnt++;
 		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
 			sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
 			if (num_out == 0) {
 				sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
 			}
 		}
 		if (nagle_on) {
 			/*
 			 * When the Nagle algorithm is used, look at how much
 			 * is unsent, then if its smaller than an MTU and we
 			 * have data in flight we stop, except if we are
 			 * handling a fragmented user message.
 			 */
 			un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
 			           (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
 			if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
 			    (stcb->asoc.total_flight > 0) &&
 			    ((stcb->asoc.locked_on_sending == NULL) ||
 			     sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
 				break;
 			}
 		}
 		if (TAILQ_EMPTY(&asoc->control_send_queue) &&
 		    TAILQ_EMPTY(&asoc->send_queue) &&
 		    stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
 			/* Nothing left to send */
 			break;
 		}
 		if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
 			/* Nothing left to send */
 			break;
 		}
 	} while (num_out &&
 	         ((asoc->max_burst == 0) ||
 		  SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
 		  (burst_cnt < asoc->max_burst)));
 	if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
 		if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
 			SCTP_STAT_INCR(sctps_maxburstqueued);
 			asoc->burst_limit_applied = 1;
 			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
 				sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
 			}
 		} else {
 			asoc->burst_limit_applied = 0;
 		}
 	}
 	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
 		sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
 	}
 	SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
 		tot_out);
 	/*-
 	 * Now we need to clean up the control chunk chain if a ECNE is on
 	 * it. It must be marked as UNSENT again so next call will continue
 	 * to send it until such time that we get a CWR, to remove it.
 	 */
 	if (stcb->asoc.ecn_echo_cnt_onq)
 		sctp_fix_ecn_echo(asoc);
 	return;
 }
 int
 sctp_output(
 	struct sctp_inpcb *inp,
 #if defined(__Panda__)
 	pakhandle_type m,
 #else
 	struct mbuf *m,
 #endif
 	struct sockaddr *addr,
 #if defined(__Panda__)
 	pakhandle_type control,
 #else
 	struct mbuf *control,
 #endif
 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
 	struct thread *p,
 #elif defined(__Windows__)
 	PKTHREAD p,
 #else
 #if defined(__APPLE__)
 	struct proc *p SCTP_UNUSED,
 #else
 	struct proc *p,
 #endif
 #endif
 	int flags)
 {
 	if (inp == NULL) {
 		SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 		return (EINVAL);
 	}
 	if (inp->sctp_socket == NULL) {
 		SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 		return (EINVAL);
 	}
 	return (sctp_sosend(inp->sctp_socket,
 			    addr,
 			    (struct uio *)NULL,
 			    m,
 			    control,
 #if defined(__APPLE__) || defined(__Panda__)
 			    flags
 #else
 			    flags, p
 #endif
 			));
 }
 void
 send_forward_tsn(struct sctp_tcb *stcb,
 		 struct sctp_association *asoc)
 {
         struct sctp_tmit_chunk *chk;
 	struct sctp_forward_tsn_chunk *fwdtsn;
 	uint32_t advance_peer_ack_point;
         SCTP_TCB_LOCK_ASSERT(stcb);
 	TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
 		if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
 			/* mark it to unsent */
 			chk->sent = SCTP_DATAGRAM_UNSENT;
 			chk->snd_count = 0;
 			/* Do we correct its output location? */
 			if (chk->whoTo) {
 				sctp_free_remote_addr(chk->whoTo);
 				chk->whoTo = NULL;
 			}
 			goto sctp_fill_in_rest;
 		}
 	}
 	/* Ok if we reach here we must build one */
 	sctp_alloc_a_chunk(stcb, chk);
 	if (chk == NULL) {
 		return;
 	}
 	asoc->fwd_tsn_cnt++;
 	chk->copy_by_ref = 0;
 	chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
 	chk->rec.chunk_id.can_take_data = 0;
 	chk->asoc = asoc;
 	chk->whoTo = NULL;
 	chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
 	if (chk->data == NULL) {
 		sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
 		return;
 	}
 	SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
 	chk->sent = SCTP_DATAGRAM_UNSENT;
 	chk->snd_count = 0;
 	TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
 	asoc->ctrl_queue_cnt++;
 sctp_fill_in_rest:
 	/*-
 	 * Here we go through and fill out the part that deals with
 	 * stream/seq of the ones we skip.
 	 */
 	SCTP_BUF_LEN(chk->data) = 0;
 	{
 		struct sctp_tmit_chunk *at, *tp1, *last;
 		struct sctp_strseq *strseq;
 		unsigned int cnt_of_space, i, ovh;
 		unsigned int space_needed;
 		unsigned int cnt_of_skipped = 0;
 		TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
 			if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
 			    (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
 				/* no more to look at */
 				break;
 			}
 			if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
 				/* We don't report these */
 				continue;
 			}
 			cnt_of_skipped++;
 		}
 		space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
 		    (cnt_of_skipped * sizeof(struct sctp_strseq)));
 		cnt_of_space = M_TRAILINGSPACE(chk->data);
 		if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
 			ovh = SCTP_MIN_OVERHEAD;
 		} else {
 			ovh = SCTP_MIN_V4_OVERHEAD;
 		}
 		if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
 			/* trim to a mtu size */
 			cnt_of_space = asoc->smallest_mtu - ovh;
 		}
 		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
 			sctp_misc_ints(SCTP_FWD_TSN_CHECK,
 xff, 0, cnt_of_skipped,
 				       asoc->advanced_peer_ack_point);
 		}
 		advance_peer_ack_point = asoc->advanced_peer_ack_point;
 		if (cnt_of_space < space_needed) {
 			/*-
 			 * ok we must trim down the chunk by lowering the
 			 * advance peer ack point.
 			 */
 			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
 				sctp_misc_ints(SCTP_FWD_TSN_CHECK,
 xff, 0xff, cnt_of_space,
 					       space_needed);
 			}
 			cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
 			cnt_of_skipped /= sizeof(struct sctp_strseq);
 			/*-
 			 * Go through and find the TSN that will be the one
 			 * we report.
 			 */
 			at = TAILQ_FIRST(&asoc->sent_queue);
 			if (at != NULL) {
 				for (i = 0; i < cnt_of_skipped; i++) {
 					tp1 = TAILQ_NEXT(at, sctp_next);
 					if (tp1 == NULL) {
 						break;
 					}
 					at = tp1;
 				}
 			}
 			if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
 				sctp_misc_ints(SCTP_FWD_TSN_CHECK,
 xff, cnt_of_skipped, at->rec.data.TSN_seq,
 					       asoc->advanced_peer_ack_point);
 			}
 			last = at;
 			/*-
 			 * last now points to last one I can report, update
 			 * peer ack point
 			 */
 			if (last)
 				advance_peer_ack_point = last->rec.data.TSN_seq;
 			space_needed = sizeof(struct sctp_forward_tsn_chunk) +
 			               cnt_of_skipped * sizeof(struct sctp_strseq);
 		}
 		chk->send_size = space_needed;
 		/* Setup the chunk */
 		fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
 		fwdtsn->ch.chunk_length = htons(chk->send_size);
 		fwdtsn->ch.chunk_flags = 0;
 		fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
 		fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
 		SCTP_BUF_LEN(chk->data) = chk->send_size;
 		fwdtsn++;
 		/*-
 		 * Move pointer to after the fwdtsn and transfer to the
 		 * strseq pointer.
 		 */
 		strseq = (struct sctp_strseq *)fwdtsn;
 		/*-
 		 * Now populate the strseq list. This is done blindly
 		 * without pulling out duplicate stream info. This is
 		 * inefficent but won't harm the process since the peer will
 		 * look at these in sequence and will thus release anything.
 		 * It could mean we exceed the PMTU and chop off some that
 		 * we could have included.. but this is unlikely (aka 1432/4
 		 * would mean 300+ stream seq's would have to be reported in
 		 * one FWD-TSN. With a bit of work we can later FIX this to
 		 * optimize and pull out duplcates.. but it does add more
 		 * overhead. So for now... not!
 		 */
 		at = TAILQ_FIRST(&asoc->sent_queue);
 		for (i = 0; i < cnt_of_skipped; i++) {
 			tp1 = TAILQ_NEXT(at, sctp_next);
 			if (tp1 == NULL)
 				break;
 			if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
 				/* We don't report these */
 				i--;
 				at = tp1;
 				continue;
 			}
 			if (at->rec.data.TSN_seq == advance_peer_ack_point) {
 				at->rec.data.fwd_tsn_cnt = 0;
 			}
 			strseq->stream = ntohs(at->rec.data.stream_number);
 			strseq->sequence = ntohs(at->rec.data.stream_seq);
 			strseq++;
 			at = tp1;
 		}
 	}
 	return;
 }
 void
 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
 	SCTP_UNUSED
 #endif
 )
 {
 	/*-
 	 * Queue up a SACK or NR-SACK in the control queue.
 	 * We must first check to see if a SACK or NR-SACK is
 	 * somehow on the control queue.
 	 * If so, we will take and and remove the old one.
 	 */
 	struct sctp_association *asoc;
 	struct sctp_tmit_chunk *chk, *a_chk;
 	struct sctp_sack_chunk *sack;
 	struct sctp_nr_sack_chunk *nr_sack;
 	struct sctp_gap_ack_block *gap_descriptor;
 	struct sack_track *selector;
 	int mergeable = 0;
 	int offset;
 	caddr_t limit;
 	uint32_t *dup;
 	int limit_reached = 0;
 	unsigned int i, siz, j;
 	unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
 	int num_dups = 0;
 	int space_req;
 	uint32_t highest_tsn;
 	uint8_t flags;
 	uint8_t type;
 	uint8_t tsn_map;
 	if ((stcb->asoc.sctp_nr_sack_on_off == 1) &&
 	    (stcb->asoc.peer_supports_nr_sack == 1)) {
 		type = SCTP_NR_SELECTIVE_ACK;
 	} else {
 		type = SCTP_SELECTIVE_ACK;
 	}
 	a_chk = NULL;
 	asoc = &stcb->asoc;
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	if (asoc->last_data_chunk_from == NULL) {
 		/* Hmm we never received anything */
 		return;
 	}
 	sctp_slide_mapping_arrays(stcb);
 	sctp_set_rwnd(stcb, asoc);
 	TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
 		if (chk->rec.chunk_id.id == type) {
 			/* Hmm, found a sack already on queue, remove it */
 			TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
 			asoc->ctrl_queue_cnt--;
 			a_chk = chk;
 			if (a_chk->data) {
 				sctp_m_freem(a_chk->data);
 				a_chk->data = NULL;
 			}
 			if (a_chk->whoTo) {
 				sctp_free_remote_addr(a_chk->whoTo);
 				a_chk->whoTo = NULL;
 			}
 			break;
 		}
 	}
 	if (a_chk == NULL) {
 		sctp_alloc_a_chunk(stcb, a_chk);
 		if (a_chk == NULL) {
 			/* No memory so we drop the idea, and set a timer */
 			if (stcb->asoc.delayed_ack) {
 				sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
 				    stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
 				sctp_timer_start(SCTP_TIMER_TYPE_RECV,
 				    stcb->sctp_ep, stcb, NULL);
 			} else {
 				stcb->asoc.send_sack = 1;
 			}
 			return;
 		}
 		a_chk->copy_by_ref = 0;
 		a_chk->rec.chunk_id.id = type;
 		a_chk->rec.chunk_id.can_take_data = 1;
 	}
 	/* Clear our pkt counts */
 	asoc->data_pkts_seen = 0;
 	a_chk->asoc = asoc;
 	a_chk->snd_count = 0;
 	a_chk->send_size = 0;	/* fill in later */
 	a_chk->sent = SCTP_DATAGRAM_UNSENT;
 	a_chk->whoTo = NULL;
 	if ((asoc->numduptsns) ||
 	    (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE))) {
 		/*-
 		 * Ok, we have some duplicates or the destination for the
 		 * sack is unreachable, lets see if we can select an
 		 * alternate than asoc->last_data_chunk_from
 		 */
 		if ((asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE) &&
 		    (asoc->used_alt_onsack > asoc->numnets)) {
 			/* We used an alt last time, don't this time */
 			a_chk->whoTo = NULL;
 		} else {
 			asoc->used_alt_onsack++;
 			a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
 		}
 		if (a_chk->whoTo == NULL) {
 			/* Nope, no alternate */
 			a_chk->whoTo = asoc->last_data_chunk_from;
 			asoc->used_alt_onsack = 0;
 		}
 	} else {
 		/*
 		 * No duplicates so we use the last place we received data
 		 * from.
 		 */
 		asoc->used_alt_onsack = 0;
 		a_chk->whoTo = asoc->last_data_chunk_from;
 	}
 	if (a_chk->whoTo) {
 		atomic_add_int(&a_chk->whoTo->ref_count, 1);
 	}
 	if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
 		highest_tsn = asoc->highest_tsn_inside_map;
 	} else {
 		highest_tsn = asoc->highest_tsn_inside_nr_map;
 	}
 	if (highest_tsn == asoc->cumulative_tsn) {
 		/* no gaps */
 		if (type == SCTP_SELECTIVE_ACK) {
 			space_req = sizeof(struct sctp_sack_chunk);
 		} else {
 			space_req = sizeof(struct sctp_nr_sack_chunk);
 		}
 	} else {
 		/* gaps get a cluster */
 		space_req = MCLBYTES;
 	}
 	/* Ok now lets formulate a MBUF with our sack */
 	a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
 	if ((a_chk->data == NULL) ||
 	    (a_chk->whoTo == NULL)) {
 		/* rats, no mbuf memory */
 		if (a_chk->data) {
 			/* was a problem with the destination */
 			sctp_m_freem(a_chk->data);
 			a_chk->data = NULL;
 		}
 		sctp_free_a_chunk(stcb, a_chk, so_locked);
 		/* sa_ignore NO_NULL_CHK */
 		if (stcb->asoc.delayed_ack) {
 			sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
 			    stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
 			sctp_timer_start(SCTP_TIMER_TYPE_RECV,
 			    stcb->sctp_ep, stcb, NULL);
 		} else {
 			stcb->asoc.send_sack = 1;
 		}
 		return;
 	}
 	/* ok, lets go through and fill it in */
 	SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
 	space = M_TRAILINGSPACE(a_chk->data);
 	if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
 		space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
 	}
 	limit = mtod(a_chk->data, caddr_t);
 	limit += space;
 	flags = 0;
 	if ((asoc->sctp_cmt_on_off > 0) &&
 	    SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
 		/*-
 		 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
 		 * received, then set high bit to 1, else 0. Reset
 		 * pkts_rcvd.
 		 */
 		flags |= (asoc->cmt_dac_pkts_rcvd << 6);
 		asoc->cmt_dac_pkts_rcvd = 0;
 	}
 #ifdef SCTP_ASOCLOG_OF_TSNS
 	stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
 	stcb->asoc.cumack_log_atsnt++;
 	if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
 		stcb->asoc.cumack_log_atsnt = 0;
 	}
 #endif
 	/* reset the readers interpretation */
 	stcb->freed_by_sorcv_sincelast = 0;
 	if (type == SCTP_SELECTIVE_ACK) {
 		sack = mtod(a_chk->data, struct sctp_sack_chunk *);
 		nr_sack = NULL;
 		gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
 		if (highest_tsn > asoc->mapping_array_base_tsn) {
 			siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
 		} else {
 			siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
 		}
 	} else {
 		sack = NULL;
 		nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
 		gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
 		if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
 			siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
 		} else {
 			siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
 		}
 	}
 	if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
 		offset = 1;
 	} else {
 		offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
 	}
 	if (((type == SCTP_SELECTIVE_ACK) &&
 	     SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
 	    ((type == SCTP_NR_SELECTIVE_ACK) &&
 	     SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
 		/* we have a gap .. maybe */
 		for (i = 0; i < siz; i++) {
 			tsn_map = asoc->mapping_array[i];
 			if (type == SCTP_SELECTIVE_ACK) {
 				tsn_map |= asoc->nr_mapping_array[i];
 			}
 			if (i == 0) {
 				/*
 				 * Clear all bits corresponding to TSNs
 				 * smaller or equal to the cumulative TSN.
 				 */
 				tsn_map &= (~0 << (1 - offset));
 			}
 			selector = &sack_array[tsn_map];
 			if (mergeable && selector->right_edge) {
 				/*
 				 * Backup, left and right edges were ok to
 				 * merge.
 				 */
 				num_gap_blocks--;
 				gap_descriptor--;
 			}
 			if (selector->num_entries == 0)
 				mergeable = 0;
 			else {
 				for (j = 0; j < selector->num_entries; j++) {
 					if (mergeable && selector->right_edge) {
 						/*
 						 * do a merge by NOT setting
 						 * the left side
 						 */
 						mergeable = 0;
 					} else {
 						/*
 						 * no merge, set the left
 						 * side
 						 */
 						mergeable = 0;
 						gap_descriptor->start = htons((selector->gaps[j].start + offset));
 					}
 					gap_descriptor->end = htons((selector->gaps[j].end + offset));
 					num_gap_blocks++;
 					gap_descriptor++;
 					if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
 						/* no more room */
 						limit_reached = 1;
 						break;
 					}
 				}
 				if (selector->left_edge) {
 					mergeable = 1;
 				}
 			}
 			if (limit_reached) {
 				/* Reached the limit stop */
 				break;
 			}
 			offset += 8;
 		}
 	}
 	if ((type == SCTP_NR_SELECTIVE_ACK) &&
 	    (limit_reached == 0)) {
 		mergeable = 0;
 		if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
 			siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
 		} else {
 			siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
 		}
 		if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
 			offset = 1;
 		} else {
 			offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
 		}
 		if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
 			/* we have a gap .. maybe */
 			for (i = 0; i < siz; i++) {
 				tsn_map = asoc->nr_mapping_array[i];
 				if (i == 0) {
 					/*
 					 * Clear all bits corresponding to TSNs
 					 * smaller or equal to the cumulative TSN.
 					 */
 					tsn_map &= (~0 << (1 - offset));
 				}
 				selector = &sack_array[tsn_map];
 				if (mergeable && selector->right_edge) {
 					/*
 					* Backup, left and right edges were ok to
 					* merge.
 					*/
 					num_nr_gap_blocks--;
 					gap_descriptor--;
 				}
 				if (selector->num_entries == 0)
 					mergeable = 0;
 				else {
 					for (j = 0; j < selector->num_entries; j++) {
 						if (mergeable && selector->right_edge) {
 							/*
 							* do a merge by NOT setting
 							* the left side
 							*/
 							mergeable = 0;
 						} else {
 							/*
 							* no merge, set the left
 							* side
 							*/
 							mergeable = 0;
 							gap_descriptor->start = htons((selector->gaps[j].start + offset));
 						}
 						gap_descriptor->end = htons((selector->gaps[j].end + offset));
 						num_nr_gap_blocks++;
 						gap_descriptor++;
 						if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
 							/* no more room */
 							limit_reached = 1;
 							break;
 						}
 					}
 					if (selector->left_edge) {
 						mergeable = 1;
 					}
 				}
 				if (limit_reached) {
 					/* Reached the limit stop */
 					break;
 				}
 				offset += 8;
 			}
 		}
 	}
 	/* now we must add any dups we are going to report. */
 	if ((limit_reached == 0) && (asoc->numduptsns)) {
 		dup = (uint32_t *) gap_descriptor;
 		for (i = 0; i < asoc->numduptsns; i++) {
 			*dup = htonl(asoc->dup_tsns[i]);
 			dup++;
 			num_dups++;
 			if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
 				/* no more room */
 				break;
 			}
 		}
 		asoc->numduptsns = 0;
 	}
 	/*
 	 * now that the chunk is prepared queue it to the control chunk
 	 * queue.
 	 */
 	if (type == SCTP_SELECTIVE_ACK) {
 		a_chk->send_size = sizeof(struct sctp_sack_chunk) +
 		                   (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
 		                   num_dups * sizeof(int32_t);
 		SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
 		sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
 		sack->sack.a_rwnd = htonl(asoc->my_rwnd);
 		sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
 		sack->sack.num_dup_tsns = htons(num_dups);
 		sack->ch.chunk_type = type;
 		sack->ch.chunk_flags = flags;
 		sack->ch.chunk_length = htons(a_chk->send_size);
 	} else {
 		a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
 		                   (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
 		                   num_dups * sizeof(int32_t);
 		SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
 		nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
 		nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
 		nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
 		nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
 		nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
 		nr_sack->nr_sack.reserved = 0;
 		nr_sack->ch.chunk_type = type;
 		nr_sack->ch.chunk_flags = flags;
 		nr_sack->ch.chunk_length = htons(a_chk->send_size);
 	}
 	TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
 	asoc->my_last_reported_rwnd = asoc->my_rwnd;
 	asoc->ctrl_queue_cnt++;
 	asoc->send_sack = 0;
 	SCTP_STAT_INCR(sctps_sendsacks);
 	return;
 }
 void
 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
     SCTP_UNUSED
 #endif
     )
 {
 	struct mbuf *m_abort, *m, *m_last;
 	struct mbuf *m_out, *m_end = NULL;
 	struct sctp_abort_chunk *abort;
 	struct sctp_auth_chunk *auth = NULL;
 	struct sctp_nets *net;
 	uint32_t vtag;
 	uint32_t auth_offset = 0;
 	uint16_t cause_len, chunk_len, padding_len;
 #if defined(__APPLE__)
 	if (so_locked) {
 		sctp_lock_assert(SCTP_INP_SO(stcb->sctp_ep));
 	} else {
 		sctp_unlock_assert(SCTP_INP_SO(stcb->sctp_ep));
 	}
 #endif
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	/*-
 	 * Add an AUTH chunk, if chunk requires it and save the offset into
 	 * the chain for AUTH
 	 */
 	if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
 	                                stcb->asoc.peer_auth_chunks)) {
 		m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
 					    stcb, SCTP_ABORT_ASSOCIATION);
 		SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
 	} else {
 		m_out = NULL;
 	}
 	m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
 	if (m_abort == NULL) {
 		if (m_out) {
 			sctp_m_freem(m_out);
 		}
 		if (operr) {
 			sctp_m_freem(operr);
 		}
 		return;
 	}
 	/* link in any error */
 	SCTP_BUF_NEXT(m_abort) = operr;
 	cause_len = 0;
 	m_last = NULL;
 	for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
 		cause_len += (uint16_t)SCTP_BUF_LEN(m);
 		if (SCTP_BUF_NEXT(m) == NULL) {
 			m_last = m;
 		}
 	}
 	SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
 	chunk_len = (uint16_t)sizeof(struct sctp_abort_chunk) + cause_len;
 	padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
 	if (m_out == NULL) {
 		/* NO Auth chunk prepended, so reserve space in front */
 		SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
 		m_out = m_abort;
 	} else {
 		/* Put AUTH chunk at the front of the chain */
 		SCTP_BUF_NEXT(m_end) = m_abort;
 	}
 	if (stcb->asoc.alternate) {
 		net = stcb->asoc.alternate;
 	} else {
 		net = stcb->asoc.primary_destination;
 	}
 	/* Fill in the ABORT chunk header. */
 	abort = mtod(m_abort, struct sctp_abort_chunk *);
 	abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
 	if (stcb->asoc.peer_vtag == 0) {
 		/* This happens iff the assoc is in COOKIE-WAIT state. */
 		vtag = stcb->asoc.my_vtag;
 		abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
 	} else {
 		vtag = stcb->asoc.peer_vtag;
 		abort->ch.chunk_flags = 0;
 	}
 	abort->ch.chunk_length = htons(chunk_len);
 	/* Add padding, if necessary. */
 	if (padding_len > 0) {
 		if ((m_last == NULL) || sctp_add_pad_tombuf(m_last, padding_len)) {
 			sctp_m_freem(m_out);
 			return;
 		}
 	}
 	(void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
 	                                 (struct sockaddr *)&net->ro._l_addr,
 	                                 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
 	                                 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
 	                                 stcb->asoc.primary_destination->port, NULL,
 #if defined(__FreeBSD__)
 , 0,
 #endif
 	                                 so_locked);
 	SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
 }
 void
 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
                             struct sctp_nets *net,
                             int reflect_vtag)
 {
 	/* formulate and SEND a SHUTDOWN-COMPLETE */
 	struct mbuf *m_shutdown_comp;
 	struct sctp_shutdown_complete_chunk *shutdown_complete;
 	uint32_t vtag;
 	uint8_t flags;
 	m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
 	if (m_shutdown_comp == NULL) {
 		/* no mbuf's */
 		return;
 	}
 	if (reflect_vtag) {
 		flags = SCTP_HAD_NO_TCB;
 		vtag = stcb->asoc.my_vtag;
 	} else {
 		flags = 0;
 		vtag = stcb->asoc.peer_vtag;
 	}
 	shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
 	shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
 	shutdown_complete->ch.chunk_flags = flags;
 	shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
 	SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
 	(void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
 	                                 (struct sockaddr *)&net->ro._l_addr,
 	                                 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
 	                                 stcb->sctp_ep->sctp_lport, stcb->rport,
 	                                 htonl(vtag),
 	                                 net->port, NULL,
 #if defined(__FreeBSD__)
 , 0,
 #endif
 	                                 SCTP_SO_NOT_LOCKED);
 	SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
 	return;
 }
 #if defined(__FreeBSD__)
 static void
 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
                    struct sctphdr *sh, uint32_t vtag,
                    uint8_t type, struct mbuf *cause,
                    uint8_t use_mflowid, uint32_t mflowid,
                    uint32_t vrf_id, uint16_t port)
 #else
 static void
 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
                    struct sctphdr *sh, uint32_t vtag,
                    uint8_t type, struct mbuf *cause,
                    uint32_t vrf_id SCTP_UNUSED, uint16_t port)
 #endif
 {
 #ifdef __Panda__
 	pakhandle_type o_pak;
 #else
 	struct mbuf *o_pak;
 #endif
 	struct mbuf *mout;
 	struct sctphdr *shout;
 	struct sctp_chunkhdr *ch;
 	struct udphdr *udp;
 	int len, cause_len, padding_len;
 #if defined(INET) || defined(INET6)
 	int ret;
 #endif
 #ifdef INET
 #if defined(__APPLE__) || defined(__Panda__)
 	sctp_route_t ro;
 #endif
 	struct sockaddr_in *src_sin, *dst_sin;
 	struct ip *ip;
 #endif
 #ifdef INET6
 	struct sockaddr_in6 *src_sin6, *dst_sin6;
 	struct ip6_hdr *ip6;
 #endif
 	/* Compute the length of the cause and add final padding. */
 	cause_len = 0;
 	if (cause != NULL) {
 		struct mbuf *m_at, *m_last = NULL;
 		for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
 			if (SCTP_BUF_NEXT(m_at) == NULL)
 				m_last = m_at;
 			cause_len += SCTP_BUF_LEN(m_at);
 		}
 		padding_len = cause_len % 4;
 		if (padding_len != 0) {
 			padding_len = 4 - padding_len;
 		}
 		if (padding_len != 0) {
 			if (sctp_add_pad_tombuf(m_last, padding_len)) {
 				sctp_m_freem(cause);
 				return;
 			}
 		}
 	} else {
 		padding_len = 0;
 	}
 	/* Get an mbuf for the header. */
 	len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
 	switch (dst->sa_family) {
 #ifdef INET
 	case AF_INET:
 		len += sizeof(struct ip);
 		break;
 #endif
 #ifdef INET6
 	case AF_INET6:
 		len += sizeof(struct ip6_hdr);
 		break;
 #endif
 	default:
 		break;
 	}
 	if (port) {
 		len += sizeof(struct udphdr);
 	}
 #if defined(__APPLE__)
 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
 	mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
 #else
 	mout = sctp_get_mbuf_for_msg(len + SCTP_MAX_LINKHDR, 1, M_NOWAIT, 1, MT_DATA);
 #endif
 #else
 	mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
 #endif
 	if (mout == NULL) {
 		if (cause) {
 			sctp_m_freem(cause);
 		}
 		return;
 	}
 #if defined(__APPLE__)
 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
 	SCTP_BUF_RESV_UF(mout, max_linkhdr);
 #else
 	SCTP_BUF_RESV_UF(mout, SCTP_MAX_LINKHDR);
 #endif
 #else
 	SCTP_BUF_RESV_UF(mout, max_linkhdr);
 #endif
 	SCTP_BUF_LEN(mout) = len;
 	SCTP_BUF_NEXT(mout) = cause;
 #if defined(__FreeBSD__)
 	if (use_mflowid != 0) {
 		mout->m_pkthdr.flowid = mflowid;
 		mout->m_flags |= M_FLOWID;
 	}
 #endif
 #ifdef INET
 	ip = NULL;
 #endif
 #ifdef INET6
 	ip6 = NULL;
 #endif
 	switch (dst->sa_family) {
 #ifdef INET
 	case AF_INET:
 		src_sin = (struct sockaddr_in *)src;
 		dst_sin = (struct sockaddr_in *)dst;
 		ip = mtod(mout, struct ip *);
 		ip->ip_v = IPVERSION;
 		ip->ip_hl = (sizeof(struct ip) >> 2);
 		ip->ip_tos = 0;
 #if defined(__FreeBSD__)
 		ip->ip_id = ip_newid();
 #elif defined(__APPLE__)
 #if RANDOM_IP_ID
 		ip->ip_id = ip_randomid();
 #else
 		ip->ip_id = htons(ip_id++);
 #endif
 #else
                 ip->ip_id = htons(ip_id++);
 #endif
 		ip->ip_off = 0;
 		ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
 		if (port) {
 			ip->ip_p = IPPROTO_UDP;
 		} else {
 			ip->ip_p = IPPROTO_SCTP;
 		}
 		ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
 		ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
 		ip->ip_sum = 0;
 		len = sizeof(struct ip);
 		shout = (struct sctphdr *)((caddr_t)ip + len);
 		break;
 #endif
 #ifdef INET6
 	case AF_INET6:
 		src_sin6 = (struct sockaddr_in6 *)src;
 		dst_sin6 = (struct sockaddr_in6 *)dst;
 		ip6 = mtod(mout, struct ip6_hdr *);
 		ip6->ip6_flow = htonl(0x60000000);
 #if defined(__FreeBSD__)
 		if (V_ip6_auto_flowlabel) {
 			ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
 		}
 #endif
 #if defined(__Userspace__)
 		ip6->ip6_hlim = IPv6_HOP_LIMIT;
 #else
 		ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
 #endif
 		if (port) {
 			ip6->ip6_nxt = IPPROTO_UDP;
 		} else {
 			ip6->ip6_nxt = IPPROTO_SCTP;
 		}
 		ip6->ip6_src = dst_sin6->sin6_addr;
 		ip6->ip6_dst = src_sin6->sin6_addr;
 		len = sizeof(struct ip6_hdr);
 		shout = (struct sctphdr *)((caddr_t)ip6 + len);
 		break;
 #endif
 	default:
 		len = 0;
 		shout = mtod(mout, struct sctphdr *);
 		break;
 	}
 	if (port) {
 		if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
 			sctp_m_freem(mout);
 			return;
 		}
 		udp = (struct udphdr *)shout;
 		udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
 		udp->uh_dport = port;
 		udp->uh_sum = 0;
 		udp->uh_ulen = htons(sizeof(struct udphdr) +
 		                     sizeof(struct sctphdr) +
 		                     sizeof(struct sctp_chunkhdr) +
 		                     cause_len + padding_len);
 		len += sizeof(struct udphdr);
 		shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
 	} else {
 		udp = NULL;
 	}
 	shout->src_port = sh->dest_port;
 	shout->dest_port = sh->src_port;
 	shout->checksum = 0;
 	if (vtag) {
 		shout->v_tag = htonl(vtag);
 	} else {
 		shout->v_tag = sh->v_tag;
 	}
 	len += sizeof(struct sctphdr);
 	ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
 	ch->chunk_type = type;
 	if (vtag) {
 		ch->chunk_flags = 0;
 	} else {
 		ch->chunk_flags = SCTP_HAD_NO_TCB;
 	}
 	ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
 	len += sizeof(struct sctp_chunkhdr);
 	len += cause_len + padding_len;
 	if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
 		sctp_m_freem(mout);
 		return;
 	}
 	SCTP_ATTACH_CHAIN(o_pak, mout, len);
 	switch (dst->sa_family) {
 #ifdef INET
 	case AF_INET:
 #if defined(__APPLE__) || defined(__Panda__)
 		/* zap the stack pointer to the route */
 		bzero(&ro, sizeof(sctp_route_t));
 #if defined(__Panda__)
 		ro._l_addr.sa.sa_family = AF_INET;
 #endif
 #endif
 		if (port) {
 #if !defined(__Windows__) && !defined(__Userspace__)
 #if defined(__FreeBSD__) && ((__FreeBSD_version > 803000 && __FreeBSD_version < 900000) || __FreeBSD_version > 900000)
 			if (V_udp_cksum) {
 				udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
 			} else {
 				udp->uh_sum = 0;
 			}
 #else
 			udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
 #endif
 #else
 			udp->uh_sum = 0;
 #endif
 		}
 #if defined(__FreeBSD__)
 #if __FreeBSD_version >= 1000000
 		ip->ip_len = htons(len);
 #else
 		ip->ip_len = len;
 #endif
 #elif defined(__APPLE__) || defined(__Userspace__)
 		ip->ip_len = len;
 #else
 		ip->ip_len = htons(len);
 #endif
 		if (port) {
 #if defined(SCTP_WITH_NO_CSUM)
 			SCTP_STAT_INCR(sctps_sendnocrc);
 #else
 			shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
 			SCTP_STAT_INCR(sctps_sendswcrc);
 #endif
 #if defined(__FreeBSD__) && ((__FreeBSD_version > 803000 && __FreeBSD_version < 900000) || __FreeBSD_version > 900000)
 			if (V_udp_cksum) {
 				SCTP_ENABLE_UDP_CSUM(o_pak);
 			}
 #else
 			SCTP_ENABLE_UDP_CSUM(o_pak);
 #endif
 		} else {
 #if defined(SCTP_WITH_NO_CSUM)
 			SCTP_STAT_INCR(sctps_sendnocrc);
 #else
 #if defined(__FreeBSD__) && __FreeBSD_version >= 800000
 			mout->m_pkthdr.csum_flags = CSUM_SCTP;
 			mout->m_pkthdr.csum_data = 0;
 			SCTP_STAT_INCR(sctps_sendhwcrc);
 #else
 			shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip));
 			SCTP_STAT_INCR(sctps_sendswcrc);
 #endif
 #endif
 		}
 #ifdef SCTP_PACKET_LOGGING
 		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
 			sctp_packet_log(o_pak);
 		}
 #endif
 #if defined(__APPLE__) || defined(__Panda__)
 		SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
 		/* Free the route if we got one back */
 		if (ro.ro_rt) {
 			RTFREE(ro.ro_rt);
 			ro.ro_rt = NULL;
 		}
 #else
 		SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
 #endif
 		break;
 #endif
 #ifdef INET6
 	case AF_INET6:
 		ip6->ip6_plen = len - sizeof(struct ip6_hdr);
 		if (port) {
 #if defined(SCTP_WITH_NO_CSUM)
 			SCTP_STAT_INCR(sctps_sendnocrc);
 #else
 			shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
 			SCTP_STAT_INCR(sctps_sendswcrc);
 #endif
 #if defined(__Windows__)
 			udp->uh_sum = 0;
 #elif !defined(__Userspace__)
 			if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
 				udp->uh_sum = 0xffff;
 			}
 #endif
 		} else {
 #if defined(SCTP_WITH_NO_CSUM)
 			SCTP_STAT_INCR(sctps_sendnocrc);
 #else
 #if defined(__FreeBSD__) && __FreeBSD_version >= 900000
 #if __FreeBSD_version > 901000
 			mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
 #else
 			mout->m_pkthdr.csum_flags = CSUM_SCTP;
 #endif
 			mout->m_pkthdr.csum_data = 0;
 			SCTP_STAT_INCR(sctps_sendhwcrc);
 #else
 			shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr));
 			SCTP_STAT_INCR(sctps_sendswcrc);
 #endif
 #endif
 		}
 #ifdef SCTP_PACKET_LOGGING
 		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
 			sctp_packet_log(o_pak);
 		}
 #endif
 		SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
 		break;
 #endif
 #if defined(__Userspace__)
 	case AF_CONN:
 	{
 		char *buffer;
 		struct sockaddr_conn *sconn;
 		sconn = (struct sockaddr_conn *)src;
 #if defined(SCTP_WITH_NO_CSUM)
 		SCTP_STAT_INCR(sctps_sendnocrc);
 #else
 		shout->checksum = sctp_calculate_cksum(mout, 0);
 		SCTP_STAT_INCR(sctps_sendswcrc);
 #endif
 #ifdef SCTP_PACKET_LOGGING
 		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
 			sctp_packet_log(mout);
 		}
 #endif
 		/* Don't alloc/free for each packet */
 		if ((buffer = malloc(len)) != NULL) {
 			m_copydata(mout, 0, len, buffer);
 			SCTP_BASE_VAR(conn_output)(sconn->sconn_addr, buffer, len, 0, 0);
 			free(buffer);
 		}
 		sctp_m_freem(mout);
 		break;
 	}
 #endif
 	default:
 		SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
 		        dst->sa_family);
 		sctp_m_freem(mout);
 		SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
 		return;
 	}
 	SCTP_STAT_INCR(sctps_sendpackets);
 	SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
 	SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
 	return;
 }
 void
 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
                              struct sctphdr *sh,
 #if defined(__FreeBSD__)
                              uint8_t use_mflowid, uint32_t mflowid,
 #endif
                              uint32_t vrf_id, uint16_t port)
 {
 	sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
 #if defined(__FreeBSD__)
 	                   use_mflowid, mflowid,
 #endif
 	                   vrf_id, port);
 }
 void
 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net,int so_locked
 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
 	SCTP_UNUSED
 #endif
 )
 {
 	struct sctp_tmit_chunk *chk;
 	struct sctp_heartbeat_chunk *hb;
 	struct timeval now;
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	if (net == NULL) {
 		return;
 	}
 	(void)SCTP_GETTIME_TIMEVAL(&now);
 	switch (net->ro._l_addr.sa.sa_family) {
 #ifdef INET
 	case AF_INET:
 		break;
 #endif
 #ifdef INET6
 	case AF_INET6:
 		break;
 #endif
 #if defined(__Userspace__)
 	case AF_CONN:
 		break;
 #endif
 	default:
 		return;
 	}
 	sctp_alloc_a_chunk(stcb, chk);
 	if (chk == NULL) {
 		SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
 		return;
 	}
 	chk->copy_by_ref = 0;
 	chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
 	chk->rec.chunk_id.can_take_data = 1;
 	chk->asoc = &stcb->asoc;
 	chk->send_size = sizeof(struct sctp_heartbeat_chunk);
 	chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
 	if (chk->data == NULL) {
 		sctp_free_a_chunk(stcb, chk, so_locked);
 		return;
 	}
 	SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
 	SCTP_BUF_LEN(chk->data) = chk->send_size;
 	chk->sent = SCTP_DATAGRAM_UNSENT;
 	chk->snd_count = 0;
 	chk->whoTo = net;
 	atomic_add_int(&chk->whoTo->ref_count, 1);
 	/* Now we have a mbuf that we can fill in with the details */
 	hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
 	memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
 	/* fill out chunk header */
 	hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
 	hb->ch.chunk_flags = 0;
 	hb->ch.chunk_length = htons(chk->send_size);
 	/* Fill out hb parameter */
 	hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
 	hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
 	hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
 	hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
 	/* Did our user request this one, put it in */
 	hb->heartbeat.hb_info.addr_family = net->ro._l_addr.sa.sa_family;
 #ifdef HAVE_SA_LEN
 	hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
 #else
 	switch (net->ro._l_addr.sa.sa_family) {
 #ifdef INET
 	case AF_INET:
 		hb->heartbeat.hb_info.addr_len = sizeof(struct sockaddr_in);
 		break;
 #endif
 #ifdef INET6
 	case AF_INET6:
 		hb->heartbeat.hb_info.addr_len = sizeof(struct sockaddr_in6);
 		break;
 #endif
 #if defined(__Userspace__)
 	case AF_CONN:
 		hb->heartbeat.hb_info.addr_len = sizeof(struct sockaddr_conn);
 		break;
 #endif
 	default:
 		hb->heartbeat.hb_info.addr_len = 0;
 		break;
 	}
 #endif
 	if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
 		/*
 		 * we only take from the entropy pool if the address is not
 		 * confirmed.
 		 */
 		net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
 		net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
 	} else {
 		net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
 		net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
 	}
 	switch (net->ro._l_addr.sa.sa_family) {
 #ifdef INET
 	case AF_INET:
 		memcpy(hb->heartbeat.hb_info.address,
 		       &net->ro._l_addr.sin.sin_addr,
 		       sizeof(net->ro._l_addr.sin.sin_addr));
 		break;
 #endif
 #ifdef INET6
 	case AF_INET6:
 		memcpy(hb->heartbeat.hb_info.address,
 		       &net->ro._l_addr.sin6.sin6_addr,
 		       sizeof(net->ro._l_addr.sin6.sin6_addr));
 		break;
 #endif
 #if defined(__Userspace__)
 	case AF_CONN:
 		memcpy(hb->heartbeat.hb_info.address,
 		       &net->ro._l_addr.sconn.sconn_addr,
 		       sizeof(net->ro._l_addr.sconn.sconn_addr));
 		break;
 #endif
 	default:
 		return;
 		break;
 	}
 	net->hb_responded = 0;
 	TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
 	stcb->asoc.ctrl_queue_cnt++;
 	SCTP_STAT_INCR(sctps_sendheartbeat);
 	return;
 }
 void
 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
 		   uint32_t high_tsn)
 {
 	struct sctp_association *asoc;
 	struct sctp_ecne_chunk *ecne;
 	struct sctp_tmit_chunk *chk;
 	if (net == NULL) {
 		return;
 	}
 	asoc = &stcb->asoc;
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
 		if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
 			/* found a previous ECN_ECHO update it if needed */
 			uint32_t cnt, ctsn;
 			ecne = mtod(chk->data, struct sctp_ecne_chunk *);
 			ctsn = ntohl(ecne->tsn);
 			if (SCTP_TSN_GT(high_tsn, ctsn)) {
 				ecne->tsn = htonl(high_tsn);
 				SCTP_STAT_INCR(sctps_queue_upd_ecne);
 			}
 			cnt = ntohl(ecne->num_pkts_since_cwr);
 			cnt++;
 			ecne->num_pkts_since_cwr = htonl(cnt);
 			return;
 		}
 	}
 	/* nope could not find one to update so we must build one */
 	sctp_alloc_a_chunk(stcb, chk);
 	if (chk == NULL) {
 		return;
 	}
 	chk->copy_by_ref = 0;
 	SCTP_STAT_INCR(sctps_queue_upd_ecne);
 	chk->rec.chunk_id.id = SCTP_ECN_ECHO;
 	chk->rec.chunk_id.can_take_data = 0;
 	chk->asoc = &stcb->asoc;
 	chk->send_size = sizeof(struct sctp_ecne_chunk);
 	chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
 	if (chk->data == NULL) {
 		sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
 		return;
 	}
 	SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
 	SCTP_BUF_LEN(chk->data) = chk->send_size;
 	chk->sent = SCTP_DATAGRAM_UNSENT;
 	chk->snd_count = 0;
 	chk->whoTo = net;
 	atomic_add_int(&chk->whoTo->ref_count, 1);
 	stcb->asoc.ecn_echo_cnt_onq++;
 	ecne = mtod(chk->data, struct sctp_ecne_chunk *);
 	ecne->ch.chunk_type = SCTP_ECN_ECHO;
 	ecne->ch.chunk_flags = 0;
 	ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
 	ecne->tsn = htonl(high_tsn);
 	ecne->num_pkts_since_cwr = htonl(1);
 	TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
 	asoc->ctrl_queue_cnt++;
 }
 void
 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
     struct mbuf *m, int len, int iphlen, int bad_crc)
 {
 	struct sctp_association *asoc;
 	struct sctp_pktdrop_chunk *drp;
 	struct sctp_tmit_chunk *chk;
 	uint8_t *datap;
 	int was_trunc = 0;
 	int fullsz = 0;
 	long spc;
 	int offset;
 	struct sctp_chunkhdr *ch, chunk_buf;
 	unsigned int chk_length;
         if (!stcb) {
             return;
         }
 	asoc = &stcb->asoc;
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	if (asoc->peer_supports_pktdrop == 0) {
 		/*-
 		 * peer must declare support before I send one.
 		 */
 		return;
 	}
 	if (stcb->sctp_socket == NULL) {
 		return;
 	}
 	sctp_alloc_a_chunk(stcb, chk);
 	if (chk == NULL) {
 		return;
 	}
 	chk->copy_by_ref = 0;
 	len -= iphlen;
 	chk->send_size = len;
         /* Validate that we do not have an ABORT in here. */
 	offset = iphlen + sizeof(struct sctphdr);
 	ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
 						   sizeof(*ch), (uint8_t *) & chunk_buf);
 	while (ch != NULL) {
 		chk_length = ntohs(ch->chunk_length);
 		if (chk_length < sizeof(*ch)) {
 			/* break to abort land */
 			break;
 		}
 		switch (ch->chunk_type) {
 		case SCTP_PACKET_DROPPED:
 		case SCTP_ABORT_ASSOCIATION:
 		case SCTP_INITIATION_ACK:
 			/**
 			 * We don't respond with an PKT-DROP to an ABORT
 			 * or PKT-DROP. We also do not respond to an
 			 * INIT-ACK, because we can't know if the initiation
 			 * tag is correct or not.
 			 */
 			sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
 			return;
 		default:
 			break;
 		}
 		offset += SCTP_SIZE32(chk_length);
 		ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
 		    sizeof(*ch), (uint8_t *) & chunk_buf);
 	}
 	if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
 	    min(stcb->asoc.smallest_mtu, MCLBYTES)) {
 		/* only send 1 mtu worth, trim off the
 		 * excess on the end.
 		 */
 		fullsz = len;
 		len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
 		was_trunc = 1;
 	}
 	chk->asoc = &stcb->asoc;
 	chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
 	if (chk->data == NULL) {
 jump_out:
 		sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
 		return;
 	}
 	SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
 	drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
 	if (drp == NULL) {
 		sctp_m_freem(chk->data);
 		chk->data = NULL;
 		goto jump_out;
 	}
 	chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
 	    sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
 	chk->book_size_scale = 0;
 	if (was_trunc) {
 		drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
 		drp->trunc_len = htons(fullsz);
 		/* Len is already adjusted to size minus overhead above
 		 * take out the pkt_drop chunk itself from it.
 		 */
 		chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
 		len = chk->send_size;
 	} else {
 		/* no truncation needed */
 		drp->ch.chunk_flags = 0;
 		drp->trunc_len = htons(0);
 	}
 	if (bad_crc) {
 		drp->ch.chunk_flags |= SCTP_BADCRC;
 	}
 	chk->send_size += sizeof(struct sctp_pktdrop_chunk);
 	SCTP_BUF_LEN(chk->data) = chk->send_size;
 	chk->sent = SCTP_DATAGRAM_UNSENT;
 	chk->snd_count = 0;
 	if (net) {
 		/* we should hit here */
 		chk->whoTo = net;
 		atomic_add_int(&chk->whoTo->ref_count, 1);
 	} else {
 		chk->whoTo = NULL;
 	}
 	chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
 	chk->rec.chunk_id.can_take_data = 1;
 	drp->ch.chunk_type = SCTP_PACKET_DROPPED;
 	drp->ch.chunk_length = htons(chk->send_size);
 	spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
 	if (spc < 0) {
 		spc = 0;
 	}
 	drp->bottle_bw = htonl(spc);
 	if (asoc->my_rwnd) {
 		drp->current_onq = htonl(asoc->size_on_reasm_queue +
 		    asoc->size_on_all_streams +
 		    asoc->my_rwnd_control_len +
 		    stcb->sctp_socket->so_rcv.sb_cc);
 	} else {
 		/*-
 		 * If my rwnd is 0, possibly from mbuf depletion as well as
 		 * space used, tell the peer there is NO space aka onq == bw
 		 */
 		drp->current_onq = htonl(spc);
 	}
 	drp->reserved = 0;
 	datap = drp->data;
 	m_copydata(m, iphlen, len, (caddr_t)datap);
 	TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
 	asoc->ctrl_queue_cnt++;
 }
 void
 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
 {
 	struct sctp_association *asoc;
 	struct sctp_cwr_chunk *cwr;
 	struct sctp_tmit_chunk *chk;
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	if (net == NULL) {
 		return;
 	}
 	asoc = &stcb->asoc;
 	TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
 		if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
 			/* found a previous CWR queued to same destination update it if needed */
 			uint32_t ctsn;
 			cwr = mtod(chk->data, struct sctp_cwr_chunk *);
 			ctsn = ntohl(cwr->tsn);
 			if (SCTP_TSN_GT(high_tsn, ctsn)) {
 				cwr->tsn = htonl(high_tsn);
 			}
 			if (override & SCTP_CWR_REDUCE_OVERRIDE) {
 				/* Make sure override is carried */
 				cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
 			}
 			return;
 		}
 	}
 	sctp_alloc_a_chunk(stcb, chk);
 	if (chk == NULL) {
 		return;
 	}
 	chk->copy_by_ref = 0;
 	chk->rec.chunk_id.id = SCTP_ECN_CWR;
 	chk->rec.chunk_id.can_take_data = 1;
 	chk->asoc = &stcb->asoc;
 	chk->send_size = sizeof(struct sctp_cwr_chunk);
 	chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
 	if (chk->data == NULL) {
 		sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
 		return;
 	}
 	SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
 	SCTP_BUF_LEN(chk->data) = chk->send_size;
 	chk->sent = SCTP_DATAGRAM_UNSENT;
 	chk->snd_count = 0;
 	chk->whoTo = net;
 	atomic_add_int(&chk->whoTo->ref_count, 1);
 	cwr = mtod(chk->data, struct sctp_cwr_chunk *);
 	cwr->ch.chunk_type = SCTP_ECN_CWR;
 	cwr->ch.chunk_flags = override;
 	cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
 	cwr->tsn = htonl(high_tsn);
 	TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
 	asoc->ctrl_queue_cnt++;
 }
 void
 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
                           int number_entries, uint16_t * list,
                           uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
 {
 	uint16_t len, old_len, i;
 	struct sctp_stream_reset_out_request *req_out;
 	struct sctp_chunkhdr *ch;
 	ch = mtod(chk->data, struct sctp_chunkhdr *);
 	old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
 	/* get to new offset for the param. */
 	req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
 	/* now how long will this param be? */
 	len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
 	req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
 	req_out->ph.param_length = htons(len);
 	req_out->request_seq = htonl(seq);
 	req_out->response_seq = htonl(resp_seq);
 	req_out->send_reset_at_tsn = htonl(last_sent);
 	if (number_entries) {
 		for (i = 0; i < number_entries; i++) {
 			req_out->list_of_streams[i] = htons(list[i]);
 		}
 	}
 	if (SCTP_SIZE32(len) > len) {
 		/*-
 		 * Need to worry about the pad we may end up adding to the
 		 * end. This is easy since the struct is either aligned to 4
 		 * bytes or 2 bytes off.
 		 */
 		req_out->list_of_streams[number_entries] = 0;
 	}
 	/* now fix the chunk length */
 	ch->chunk_length = htons(len + old_len);
 	chk->book_size = len + old_len;
 	chk->book_size_scale = 0;
 	chk->send_size = SCTP_SIZE32(chk->book_size);
 	SCTP_BUF_LEN(chk->data) = chk->send_size;
 	return;
 }
 static void
 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
                          int number_entries, uint16_t *list,
                          uint32_t seq)
 {
 	uint16_t len, old_len, i;
 	struct sctp_stream_reset_in_request *req_in;
 	struct sctp_chunkhdr *ch;
 	ch = mtod(chk->data, struct sctp_chunkhdr *);
 	old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
 	/* get to new offset for the param. */
 	req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
 	/* now how long will this param be? */
 	len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
 	req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
 	req_in->ph.param_length = htons(len);
 	req_in->request_seq = htonl(seq);
 	if (number_entries) {
 		for (i = 0; i < number_entries; i++) {
 			req_in->list_of_streams[i] = htons(list[i]);
 		}
 	}
 	if (SCTP_SIZE32(len) > len) {
 		/*-
 		 * Need to worry about the pad we may end up adding to the
 		 * end. This is easy since the struct is either aligned to 4
 		 * bytes or 2 bytes off.
 		 */
 		req_in->list_of_streams[number_entries] = 0;
 	}
 	/* now fix the chunk length */
 	ch->chunk_length = htons(len + old_len);
 	chk->book_size = len + old_len;
 	chk->book_size_scale = 0;
 	chk->send_size = SCTP_SIZE32(chk->book_size);
 	SCTP_BUF_LEN(chk->data) = chk->send_size;
 	return;
 }
 static void
 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
                           uint32_t seq)
 {
 	uint16_t len, old_len;
 	struct sctp_stream_reset_tsn_request *req_tsn;
 	struct sctp_chunkhdr *ch;
 	ch = mtod(chk->data, struct sctp_chunkhdr *);
 	old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
 	/* get to new offset for the param. */
 	req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
 	/* now how long will this param be? */
 	len = sizeof(struct sctp_stream_reset_tsn_request);
 	req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
 	req_tsn->ph.param_length = htons(len);
 	req_tsn->request_seq = htonl(seq);
 	/* now fix the chunk length */
 	ch->chunk_length = htons(len + old_len);
 	chk->send_size = len + old_len;
 	chk->book_size = SCTP_SIZE32(chk->send_size);
 	chk->book_size_scale = 0;
 	SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
 	return;
 }
 void
 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
                              uint32_t resp_seq, uint32_t result)
 {
 	uint16_t len, old_len;
 	struct sctp_stream_reset_response *resp;
 	struct sctp_chunkhdr *ch;
 	ch = mtod(chk->data, struct sctp_chunkhdr *);
 	old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
 	/* get to new offset for the param. */
 	resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
 	/* now how long will this param be? */
 	len = sizeof(struct sctp_stream_reset_response);
 	resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
 	resp->ph.param_length = htons(len);
 	resp->response_seq = htonl(resp_seq);
 	resp->result = ntohl(result);
 	/* now fix the chunk length */
 	ch->chunk_length = htons(len + old_len);
 	chk->book_size = len + old_len;
 	chk->book_size_scale = 0;
 	chk->send_size = SCTP_SIZE32(chk->book_size);
 	SCTP_BUF_LEN(chk->data) = chk->send_size;
 	return;
 }
 void
 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
                                  uint32_t resp_seq, uint32_t result,
                                  uint32_t send_una, uint32_t recv_next)
 {
 	uint16_t len, old_len;
 	struct sctp_stream_reset_response_tsn *resp;
 	struct sctp_chunkhdr *ch;
 	ch = mtod(chk->data, struct sctp_chunkhdr *);
 	old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
 	/* get to new offset for the param. */
 	resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
 	/* now how long will this param be? */
 	len = sizeof(struct sctp_stream_reset_response_tsn);
 	resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
 	resp->ph.param_length = htons(len);
 	resp->response_seq = htonl(resp_seq);
 	resp->result = htonl(result);
 	resp->senders_next_tsn = htonl(send_una);
 	resp->receivers_next_tsn = htonl(recv_next);
 	/* now fix the chunk length */
 	ch->chunk_length = htons(len + old_len);
 	chk->book_size = len + old_len;
 	chk->send_size = SCTP_SIZE32(chk->book_size);
 	chk->book_size_scale = 0;
 	SCTP_BUF_LEN(chk->data) = chk->send_size;
 	return;
 }
 static void
 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
 		       uint32_t seq,
 		       uint16_t adding)
 {
 	uint16_t len, old_len;
 	struct sctp_chunkhdr *ch;
 	struct sctp_stream_reset_add_strm *addstr;
 	ch = mtod(chk->data, struct sctp_chunkhdr *);
 	old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
 	/* get to new offset for the param. */
 	addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
 	/* now how long will this param be? */
 	len = sizeof(struct sctp_stream_reset_add_strm);
 	/* Fill it out. */
 	addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
 	addstr->ph.param_length = htons(len);
 	addstr->request_seq = htonl(seq);
 	addstr->number_of_streams = htons(adding);
 	addstr->reserved = 0;
 	/* now fix the chunk length */
 	ch->chunk_length = htons(len + old_len);
 	chk->send_size = len + old_len;
 	chk->book_size = SCTP_SIZE32(chk->send_size);
 	chk->book_size_scale = 0;
 	SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
 	return;
 }
 static void
 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
                       uint32_t seq,
                       uint16_t adding)
 {
 	uint16_t len, old_len;
 	struct sctp_chunkhdr *ch;
 	struct sctp_stream_reset_add_strm *addstr;
 	ch = mtod(chk->data, struct sctp_chunkhdr *);
 	old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
 	/* get to new offset for the param. */
 	addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
 	/* now how long will this param be? */
 	len = sizeof(struct sctp_stream_reset_add_strm);
 	/* Fill it out. */
 	addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
 	addstr->ph.param_length = htons(len);
 	addstr->request_seq = htonl(seq);
 	addstr->number_of_streams = htons(adding);
 	addstr->reserved = 0;
 	/* now fix the chunk length */
 	ch->chunk_length = htons(len + old_len);
 	chk->send_size = len + old_len;
 	chk->book_size = SCTP_SIZE32(chk->send_size);
 	chk->book_size_scale = 0;
 	SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
 	return;
 }
 int
 sctp_send_str_reset_req(struct sctp_tcb *stcb,
                         int number_entries, uint16_t *list,
                         uint8_t send_out_req,
                         uint8_t send_in_req,
                         uint8_t send_tsn_req,
                         uint8_t add_stream,
                         uint16_t adding_o,
                         uint16_t adding_i, uint8_t peer_asked)
 {
 	struct sctp_association *asoc;
 	struct sctp_tmit_chunk *chk;
 	struct sctp_chunkhdr *ch;
 	uint32_t seq;
 	asoc = &stcb->asoc;
 	if (asoc->stream_reset_outstanding) {
 		/*-
 		 * Already one pending, must get ACK back to clear the flag.
 		 */
 		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
 		return (EBUSY);
 	}
 	if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) &&
 	    (add_stream == 0)) {
 		/* nothing to do */
 		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 		return (EINVAL);
 	}
 	if (send_tsn_req && (send_out_req || send_in_req)) {
 		/* error, can't do that */
 		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 		return (EINVAL);
 	}
 	sctp_alloc_a_chunk(stcb, chk);
 	if (chk == NULL) {
 		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 		return (ENOMEM);
 	}
 	chk->copy_by_ref = 0;
 	chk->rec.chunk_id.id = SCTP_STREAM_RESET;
 	chk->rec.chunk_id.can_take_data = 0;
 	chk->asoc = &stcb->asoc;
 	chk->book_size = sizeof(struct sctp_chunkhdr);
 	chk->send_size = SCTP_SIZE32(chk->book_size);
 	chk->book_size_scale = 0;
 	chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
 	if (chk->data == NULL) {
 		sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
 		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 		return (ENOMEM);
 	}
 	SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
 	/* setup chunk parameters */
 	chk->sent = SCTP_DATAGRAM_UNSENT;
 	chk->snd_count = 0;
 	if (stcb->asoc.alternate) {
 		chk->whoTo = stcb->asoc.alternate;
 	} else {
 		chk->whoTo = stcb->asoc.primary_destination;
 	}
 	atomic_add_int(&chk->whoTo->ref_count, 1);
 	ch = mtod(chk->data, struct sctp_chunkhdr *);
 	ch->chunk_type = SCTP_STREAM_RESET;
 	ch->chunk_flags = 0;
 	ch->chunk_length = htons(chk->book_size);
 	SCTP_BUF_LEN(chk->data) = chk->send_size;
 	seq = stcb->asoc.str_reset_seq_out;
 	if (send_out_req) {
 		sctp_add_stream_reset_out(chk, number_entries, list,
 					  seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
 		asoc->stream_reset_out_is_outstanding = 1;
 		seq++;
 		asoc->stream_reset_outstanding++;
 	}
 	if ((add_stream & 1) &&
 	    ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
 		/* Need to allocate more */
 		struct sctp_stream_out *oldstream;
 		struct sctp_stream_queue_pending *sp, *nsp;
 		int i;
 		oldstream = stcb->asoc.strmout;
 		/* get some more */
 		SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
 			    ((stcb->asoc.streamoutcnt+adding_o) * sizeof(struct sctp_stream_out)),
 			    SCTP_M_STRMO);
 		if (stcb->asoc.strmout == NULL) {
 			uint8_t x;
 			stcb->asoc.strmout = oldstream;
 			/* Turn off the bit */
 			x = add_stream & 0xfe;
 			add_stream = x;
 			goto skip_stuff;
 		}
 		/* Ok now we proceed with copying the old out stuff and
 		 * initializing the new stuff.
 		 */
 		SCTP_TCB_SEND_LOCK(stcb);
 		stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
 		for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
 			TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
 			stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
 			stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send;
 			stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
 			stcb->asoc.strmout[i].stream_no = i;
 			stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
 			/* now anything on those queues? */
 			TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
 				TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
 				TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
 			}
 			/* Now move assoc pointers too */
 			if (stcb->asoc.last_out_stream == &oldstream[i]) {
 				stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
 			}
 			if (stcb->asoc.locked_on_sending == &oldstream[i]) {
 				stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
 			}
 		}
 		/* now the new streams */
 		stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
 		for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
 			TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
 			stcb->asoc.strmout[i].chunks_on_queues = 0;
 			stcb->asoc.strmout[i].next_sequence_send = 0x0;
 			stcb->asoc.strmout[i].stream_no = i;
 			stcb->asoc.strmout[i].last_msg_incomplete = 0;
 			stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
 		}
 		stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
 		SCTP_FREE(oldstream, SCTP_M_STRMO);
 		SCTP_TCB_SEND_UNLOCK(stcb);
 	}
 skip_stuff:
 	if ((add_stream & 1) && (adding_o > 0)) {
 		asoc->strm_pending_add_size = adding_o;
 		asoc->peer_req_out = peer_asked;
 		sctp_add_an_out_stream(chk, seq, adding_o);
 		seq++;
 		asoc->stream_reset_outstanding++;
 	}
 	if ((add_stream & 2) && (adding_i > 0)) {
 		sctp_add_an_in_stream(chk, seq, adding_i);
 		seq++;
 		asoc->stream_reset_outstanding++;
 	}
 	if (send_in_req) {
 		sctp_add_stream_reset_in(chk, number_entries, list, seq);
 		seq++;
 		asoc->stream_reset_outstanding++;
 	}
 	if (send_tsn_req) {
 		sctp_add_stream_reset_tsn(chk, seq);
 		asoc->stream_reset_outstanding++;
 	}
 	asoc->str_reset = chk;
 	/* insert the chunk for sending */
 	TAILQ_INSERT_TAIL(&asoc->control_send_queue,
 			  chk,
 			  sctp_next);
 	asoc->ctrl_queue_cnt++;
 	sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
 	return (0);
 }
 void
 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
                 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
 #if defined(__FreeBSD__)
                 uint8_t use_mflowid, uint32_t mflowid,
 #endif
                 uint32_t vrf_id, uint16_t port)
 {
 	/* Don't respond to an ABORT with an ABORT. */
 	if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
 		if (cause)
 			sctp_m_freem(cause);
 		return;
 	}
 	sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
 #if defined(__FreeBSD__)
 	                   use_mflowid, mflowid,
 #endif
 	                   vrf_id, port);
 	return;
 }
 void
 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
                    struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
 #if defined(__FreeBSD__)
                    uint8_t use_mflowid, uint32_t mflowid,
 #endif
                    uint32_t vrf_id, uint16_t port)
 {
 	sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
 #if defined(__FreeBSD__)
 	                   use_mflowid, mflowid,
 #endif
 	                   vrf_id, port);
 	return;
 }
 static struct mbuf *
 sctp_copy_resume(struct uio *uio,
 		 int max_send_len,
 #if defined(__FreeBSD__) && __FreeBSD_version > 602000
 		 int user_marks_eor,
 #endif
 		 int *error,
 		 uint32_t *sndout,
 		 struct mbuf **new_tail)
 {
 #if defined(__Panda__)
 	struct mbuf *m;
 	m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
 			(user_marks_eor ? M_EOR : 0));
 	if (m == NULL) {
 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 		*error = ENOMEM;
 	} else {
 		*sndout = m_length(m, NULL);
 		*new_tail = m_last(m);
 	}
 	return (m);
 #elif defined(__FreeBSD__) && __FreeBSD_version > 602000
 	struct mbuf *m;
 	m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
 		(M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
 	if (m == NULL) {
 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 		*error = ENOMEM;
 	} else {
 		*sndout = m_length(m, NULL);
 		*new_tail = m_last(m);
 	}
 	return (m);
 #else
 	int left, cancpy, willcpy;
 	struct mbuf *m, *head;
 #if defined(__APPLE__)
 #if defined(APPLE_LEOPARD)
         left = min(uio->uio_resid, max_send_len);
 #else
         left = min(uio_resid(uio), max_send_len);
 #endif
 #else
         left = min(uio->uio_resid, max_send_len);
 #endif
 	/* Always get a header just in case */
 	head = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 0, MT_DATA);
 	if (head == NULL) {
 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 		*error = ENOMEM;
 		return (NULL);
 	}
 	cancpy = M_TRAILINGSPACE(head);
 	willcpy = min(cancpy, left);
 	*error = uiomove(mtod(head, caddr_t), willcpy, uio);
 	if (*error) {
 		sctp_m_freem(head);
 		return (NULL);
 	}
 	*sndout += willcpy;
 	left -= willcpy;
 	SCTP_BUF_LEN(head) = willcpy;
 	m = head;
 	*new_tail = head;
 	while (left > 0) {
 		/* move in user data */
 		SCTP_BUF_NEXT(m) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 0, MT_DATA);
 		if (SCTP_BUF_NEXT(m) == NULL) {
 			sctp_m_freem(head);
 			*new_tail = NULL;
 			SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 			*error = ENOMEM;
 			return (NULL);
 		}
 		m = SCTP_BUF_NEXT(m);
 		cancpy = M_TRAILINGSPACE(m);
 		willcpy = min(cancpy, left);
 		*error = uiomove(mtod(m, caddr_t), willcpy, uio);
 		if (*error) {
 			sctp_m_freem(head);
 			*new_tail = NULL;
 			SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
 			*error = EFAULT;
 			return (NULL);
 		}
 		SCTP_BUF_LEN(m) = willcpy;
 		left -= willcpy;
 		*sndout += willcpy;
 		*new_tail = m;
 		if (left == 0) {
 			SCTP_BUF_NEXT(m) = NULL;
 		}
 	}
 	return (head);
 #endif
 }
 static int
 sctp_copy_one(struct sctp_stream_queue_pending *sp,
 	      struct uio *uio,
 	      int resv_upfront)
 {
 	int left;
 #if defined(__Panda__)
 	left = sp->length;
 	sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
 			       resv_upfront, 0);
 	if (sp->data == NULL) {
 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 		return (ENOMEM);
 	}
 	sp->tail_mbuf = m_last(sp->data);
 	return (0);
 #elif defined(__FreeBSD__) && __FreeBSD_version > 602000
 	left = sp->length;
 	sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
 			       resv_upfront, 0);
 	if (sp->data == NULL) {
 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 		return (ENOMEM);
 	}
 	sp->tail_mbuf = m_last(sp->data);
 	return (0);
 #else
 	int cancpy, willcpy, error;
 	struct mbuf *m, *head;
 	int cpsz = 0;
 	/* First one gets a header */
 	left = sp->length;
 	head = m = sctp_get_mbuf_for_msg((left + resv_upfront), 0, M_WAITOK, 0, MT_DATA);
 	if (m == NULL) {
 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 		return (ENOMEM);
 	}
 	/*-
 	 * Add this one for m in now, that way if the alloc fails we won't
 	 * have a bad cnt.
 	 */
 	SCTP_BUF_RESV_UF(m, resv_upfront);
 	cancpy = M_TRAILINGSPACE(m);
 	willcpy = min(cancpy, left);
 	while (left > 0) {
 		/* move in user data */
 		error = uiomove(mtod(m, caddr_t), willcpy, uio);
 		if (error) {
 			sctp_m_freem(head);
 			return (error);
 		}
 		SCTP_BUF_LEN(m) = willcpy;
 		left -= willcpy;
 		cpsz += willcpy;
 		if (left > 0) {
 			SCTP_BUF_NEXT(m) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 0, MT_DATA);
 			if (SCTP_BUF_NEXT(m) == NULL) {
 				/*
 				 * the head goes back to caller, he can free
 				 * the rest
 				 */
 				sctp_m_freem(head);
 				SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 				return (ENOMEM);
 			}
 			m = SCTP_BUF_NEXT(m);
 			cancpy = M_TRAILINGSPACE(m);
 			willcpy = min(cancpy, left);
 		} else {
 			sp->tail_mbuf = m;
 			SCTP_BUF_NEXT(m) = NULL;
 		}
 	}
 	sp->data = head;
 	sp->length = cpsz;
 	return (0);
 #endif
 }
 static struct sctp_stream_queue_pending *
 sctp_copy_it_in(struct sctp_tcb *stcb,
     struct sctp_association *asoc,
     struct sctp_sndrcvinfo *srcv,
     struct uio *uio,
     struct sctp_nets *net,
     int max_send_len,
     int user_marks_eor,
     int *error)
 {
 	/*-
 	 * This routine must be very careful in its work. Protocol
 	 * processing is up and running so care must be taken to spl...()
 	 * when you need to do something that may effect the stcb/asoc. The
 	 * sb is locked however. When data is copied the protocol processing
 	 * should be enabled since this is a slower operation...
 	 */
 	struct sctp_stream_queue_pending *sp = NULL;
 	int resv_in_first;
 	*error = 0;
 	/* Now can we send this? */
 	if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
 	    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
 	    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
 	    (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
 		/* got data while shutting down */
 		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
 		*error = ECONNRESET;
 		goto out_now;
 	}
 	sctp_alloc_a_strmoq(stcb, sp);
 	if (sp == NULL) {
 		SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 		*error = ENOMEM;
 		goto out_now;
 	}
 	sp->act_flags = 0;
 	sp->sender_all_done = 0;
 	sp->sinfo_flags = srcv->sinfo_flags;
 	sp->timetolive = srcv->sinfo_timetolive;
 	sp->ppid = srcv->sinfo_ppid;
 	sp->context = srcv->sinfo_context;
 	(void)SCTP_GETTIME_TIMEVAL(&sp->ts);
 	sp->stream = srcv->sinfo_stream;
 #if defined(__APPLE__)
 #if defined(APPLE_LEOPARD)
 	sp->length = min(uio->uio_resid, max_send_len);
 #else
 	sp->length = min(uio_resid(uio), max_send_len);
 #endif
 #else
 	sp->length = min(uio->uio_resid, max_send_len);
 #endif
 #if defined(__APPLE__)
 #if defined(APPLE_LEOPARD)
 	if ((sp->length == (uint32_t)uio->uio_resid) &&
 #else
 	if ((sp->length == (uint32_t)uio_resid(uio)) &&
 #endif
 #else
 	if ((sp->length == (uint32_t)uio->uio_resid) &&
 #endif
 	    ((user_marks_eor == 0) ||
 	     (srcv->sinfo_flags & SCTP_EOF) ||
 	     (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
 		sp->msg_is_complete = 1;
 	} else {
 		sp->msg_is_complete = 0;
 	}
 	sp->sender_all_done = 0;
 	sp->some_taken = 0;
 	sp->put_last_out = 0;
 	resv_in_first = sizeof(struct sctp_data_chunk);
 	sp->data = sp->tail_mbuf = NULL;
 	if (sp->length == 0) {
 		*error = 0;
 		goto skip_copy;
 	}
 	if (srcv->sinfo_keynumber_valid) {
 		sp->auth_keyid = srcv->sinfo_keynumber;
 	} else {
 		sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
 	}
 	if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
 		sctp_auth_key_acquire(stcb, sp->auth_keyid);
 		sp->holds_key_ref = 1;
 	}
 #if defined(__APPLE__)
 	SCTP_SOCKET_UNLOCK(SCTP_INP_SO(stcb->sctp_ep), 0);
 #endif
 	*error = sctp_copy_one(sp, uio, resv_in_first);
 #if defined(__APPLE__)
 	SCTP_SOCKET_LOCK(SCTP_INP_SO(stcb->sctp_ep), 0);
 #endif
  skip_copy:
 	if (*error) {
 		sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
 		sp = NULL;
 	} else {
 		if (sp->sinfo_flags & SCTP_ADDR_OVER) {
 			sp->net = net;
 			atomic_add_int(&sp->net->ref_count, 1);
 		} else {
 			sp->net = NULL;
 		}
 		sctp_set_prsctp_policy(sp);
 	}
 out_now:
 	return (sp);
 }
 int
 sctp_sosend(struct socket *so,
             struct sockaddr *addr,
             struct uio *uio,
 #ifdef __Panda__
             pakhandle_type top,
             pakhandle_type icontrol,
 #else
             struct mbuf *top,
             struct mbuf *control,
 #endif
 #if defined(__APPLE__) || defined(__Panda__)
             int flags
 #else
             int flags,
 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
             struct thread *p
 #elif defined(__Windows__)
             PKTHREAD p
 #else
 #if defined(__Userspace__)
             /*
 	     * proc is a dummy in __Userspace__ and will not be passed
 	     * to sctp_lower_sosend
 	     */
 #endif
             struct proc *p
 #endif
 #endif
 )
 {
 #ifdef __Panda__
 	struct mbuf *control = NULL;
 #endif
 #if defined(__APPLE__)
 	struct proc *p = current_proc();
 #endif
 	int error, use_sndinfo = 0;
 	struct sctp_sndrcvinfo sndrcvninfo;
 	struct sockaddr *addr_to_use;
 #if defined(INET) && defined(INET6)
 	struct sockaddr_in sin;
 #endif
 #if defined(__APPLE__)
 	SCTP_SOCKET_LOCK(so, 1);
 #endif
 #ifdef __Panda__
 	control = SCTP_HEADER_TO_CHAIN(icontrol);
 #endif
 	if (control) {
 		/* process cmsg snd/rcv info (maybe a assoc-id) */
 		if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
 		    sizeof(sndrcvninfo))) {
 			/* got one */
 			use_sndinfo = 1;
 		}
 	}
 	addr_to_use = addr;
 #if defined(INET) && defined(INET6)
 	if ((addr) && (addr->sa_family == AF_INET6)) {
 		struct sockaddr_in6 *sin6;
 		sin6 = (struct sockaddr_in6 *)addr;
 		if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
 			in6_sin6_2_sin(&sin, sin6);
 			addr_to_use = (struct sockaddr *)&sin;
 		}
 	}
 #endif
 	error = sctp_lower_sosend(so, addr_to_use, uio, top,
 #ifdef __Panda__
 				  icontrol,
 #else
 				  control,
 #endif
 				  flags,
 				  use_sndinfo ? &sndrcvninfo: NULL
 #if !(defined(__Panda__) || defined(__Userspace__))
 				  , p
 #endif
 		);
 #if defined(__APPLE__)
 	SCTP_SOCKET_UNLOCK(so, 1);
 #endif
 	return (error);
 }
 int
 sctp_lower_sosend(struct socket *so,
                   struct sockaddr *addr,
                   struct uio *uio,
 #ifdef __Panda__
                   pakhandle_type i_pak,
                   pakhandle_type i_control,
 #else
                   struct mbuf *i_pak,
                   struct mbuf *control,
 #endif
                   int flags,
                   struct sctp_sndrcvinfo *srcv
 #if !(defined( __Panda__) || defined(__Userspace__))
                   ,
 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
                   struct thread *p
 #elif defined(__Windows__)
                   PKTHREAD p
 #else
                   struct proc *p
 #endif
 #endif
 	)
 {
 	unsigned int sndlen = 0, max_len;
 	int error, len;
 	struct mbuf *top = NULL;
 #ifdef __Panda__
 	struct mbuf *control = NULL;
 #endif
 	int queue_only = 0, queue_only_for_init = 0;
 	int free_cnt_applied = 0;
 	int un_sent;
 	int now_filled = 0;
 	unsigned int inqueue_bytes = 0;
 	struct sctp_block_entry be;
 	struct sctp_inpcb *inp;
 	struct sctp_tcb *stcb = NULL;
 	struct timeval now;
 	struct sctp_nets *net;
 	struct sctp_association *asoc;
 	struct sctp_inpcb *t_inp;
 	int user_marks_eor;
 	int create_lock_applied = 0;
 	int nagle_applies = 0;
 	int some_on_control = 0;
 	int got_all_of_the_send = 0;
 	int hold_tcblock = 0;
 	int non_blocking = 0;
 	uint32_t local_add_more, local_soresv = 0;
 	uint16_t port;
 	uint16_t sinfo_flags;
 	sctp_assoc_t sinfo_assoc_id;
 	error = 0;
 	net = NULL;
 	stcb = NULL;
 	asoc = NULL;
 #if defined(__APPLE__)
 	sctp_lock_assert(so);
 #endif
 	t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
 	if (inp == NULL) {
 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 		error = EINVAL;
 		if (i_pak) {
 			SCTP_RELEASE_PKT(i_pak);
 		}
 		return (error);
 	}
 	if ((uio == NULL) && (i_pak == NULL)) {
 		SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 		return (EINVAL);
 	}
 	user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
 	atomic_add_int(&inp->total_sends, 1);
 	if (uio) {
 #if defined(__APPLE__)
 #if defined(APPLE_LEOPARD)
 		if (uio->uio_resid < 0) {
 #else
 		if (uio_resid(uio) < 0) {
 #endif
 #else
 		if (uio->uio_resid < 0) {
 #endif
 			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 			return (EINVAL);
 		}
 #if defined(__APPLE__)
 #if defined(APPLE_LEOPARD)
 		sndlen = uio->uio_resid;
 #else
 		sndlen = uio_resid(uio);
 #endif
 #else
 		sndlen = uio->uio_resid;
 #endif
 	} else {
 		top = SCTP_HEADER_TO_CHAIN(i_pak);
 #ifdef __Panda__
 		/*-
 		 * app len indicates the datalen, dgsize for cases
 		 * of SCTP_EOF/ABORT will not have the right len
 		 */
 		sndlen = SCTP_APP_DATA_LEN(i_pak);
 		/*-
 		 * Set the particle len also to zero to match
 		 * up with app len. We only have one particle
 		 * if app len is zero for Panda. This is ensured
 		 * in the socket lib
 		 */
 		if (sndlen == 0) {
 			SCTP_BUF_LEN(top)  = 0;
 		}
 		/*-
 		 * We delink the chain from header, but keep
 		 * the header around as we will need it in
 		 * EAGAIN case
 		 */
 		SCTP_DETACH_HEADER_FROM_CHAIN(i_pak);
 #else
 		sndlen = SCTP_HEADER_LEN(i_pak);
 #endif
 	}
 	SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
 		(void *)addr,
 	        sndlen);
 #ifdef __Panda__
 	if (i_control) {
 		control = SCTP_HEADER_TO_CHAIN(i_control);
 	}
 #endif
 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
 	    (inp->sctp_socket->so_qlimit)) {
 		/* The listener can NOT send */
 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
 		error = ENOTCONN;
 		goto out_unlocked;
 	}
 	/**
 	 * Pre-screen address, if one is given the sin-len
 	 * must be set correctly!
 	 */
 	if (addr) {
 		union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
 		switch (raddr->sa.sa_family) {
 #ifdef INET
 		case AF_INET:
 #ifdef HAVE_SIN_LEN
 			if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
 				SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 				error = EINVAL;
 				goto out_unlocked;
 			}
 #endif
 			port = raddr->sin.sin_port;
 			break;
 #endif
 #ifdef INET6
 		case AF_INET6:
 #ifdef HAVE_SIN6_LEN
 			if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
 				SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 				error = EINVAL;
 				goto out_unlocked;
 			}
 #endif
 			port = raddr->sin6.sin6_port;
 			break;
 #endif
 #if defined(__Userspace__)
 		case AF_CONN:
 #ifdef HAVE_SCONN_LEN
 			if (raddr->sconn.sconn_len != sizeof(struct sockaddr_conn)) {
 				SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 				error = EINVAL;
 				goto out_unlocked;
 			}
 #endif
 			port = raddr->sconn.sconn_port;
 			break;
 #endif
 		default:
 			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
 			error = EAFNOSUPPORT;
 			goto out_unlocked;
 		}
 	} else
 		port = 0;
 	if (srcv) {
 		sinfo_flags = srcv->sinfo_flags;
 		sinfo_assoc_id = srcv->sinfo_assoc_id;
 		if (INVALID_SINFO_FLAG(sinfo_flags) ||
 		    PR_SCTP_INVALID_POLICY(sinfo_flags)) {
 			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 			error = EINVAL;
 			goto out_unlocked;
 		}
 		if (srcv->sinfo_flags)
 			SCTP_STAT_INCR(sctps_sends_with_flags);
 	} else {
 		sinfo_flags = inp->def_send.sinfo_flags;
 		sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
 	}
 	if (sinfo_flags & SCTP_SENDALL) {
 		/* its a sendall */
 		error = sctp_sendall(inp, uio, top, srcv);
 		top = NULL;
 		goto out_unlocked;
 	}
 	if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
 		SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 		error = EINVAL;
 		goto out_unlocked;
 	}
 	/* now we must find the assoc */
 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
 	    (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
 		SCTP_INP_RLOCK(inp);
 		stcb = LIST_FIRST(&inp->sctp_asoc_list);
 		if (stcb) {
 			SCTP_TCB_LOCK(stcb);
 			hold_tcblock = 1;
 		}
 		SCTP_INP_RUNLOCK(inp);
 	} else if (sinfo_assoc_id) {
 		stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
 	} else if (addr) {
 		/*-
 		 * Since we did not use findep we must
 		 * increment it, and if we don't find a tcb
 		 * decrement it.
 		 */
 		SCTP_INP_WLOCK(inp);
 		SCTP_INP_INCR_REF(inp);
 		SCTP_INP_WUNLOCK(inp);
 		stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
 		if (stcb == NULL) {
 			SCTP_INP_WLOCK(inp);
 			SCTP_INP_DECR_REF(inp);
 			SCTP_INP_WUNLOCK(inp);
 		} else {
 			hold_tcblock = 1;
 		}
 	}
 	if ((stcb == NULL) && (addr)) {
 		/* Possible implicit send? */
 		SCTP_ASOC_CREATE_LOCK(inp);
 		create_lock_applied = 1;
 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
 		    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
 			/* Should I really unlock ? */
 			SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 			error = EINVAL;
 			goto out_unlocked;
 		}
 		if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
 		    (addr->sa_family == AF_INET6)) {
 			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 			error = EINVAL;
 			goto out_unlocked;
 		}
 		SCTP_INP_WLOCK(inp);
 		SCTP_INP_INCR_REF(inp);
 		SCTP_INP_WUNLOCK(inp);
 		/* With the lock applied look again */
 		stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
 		if ((stcb == NULL) && (control != NULL) && (port > 0)) {
 			stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
 		}
 		if (stcb == NULL) {
 			SCTP_INP_WLOCK(inp);
 			SCTP_INP_DECR_REF(inp);
 			SCTP_INP_WUNLOCK(inp);
 		} else {
 			hold_tcblock = 1;
 		}
 		if (error) {
 			goto out_unlocked;
 		}
 		if (t_inp != inp) {
 			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
 			error = ENOTCONN;
 			goto out_unlocked;
 		}
 	}
 	if (stcb == NULL) {
 		if (addr == NULL) {
 			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
 			error = ENOENT;
 			goto out_unlocked;
 		} else {
 			/* We must go ahead and start the INIT process */
 			uint32_t vrf_id;
 			if ((sinfo_flags & SCTP_ABORT) ||
 			    ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
 				/*-
 				 * User asks to abort a non-existant assoc,
 				 * or EOF a non-existant assoc with no data
 				 */
 				SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
 				error = ENOENT;
 				goto out_unlocked;
 			}
 			/* get an asoc/stcb struct */
 			vrf_id = inp->def_vrf_id;
 #ifdef INVARIANTS
 			if (create_lock_applied == 0) {
 				panic("Error, should hold create lock and I don't?");
 			}
 #endif
 			stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
 #if !(defined( __Panda__) || defined(__Userspace__))
 					       p
 #else
 					       (struct proc *)NULL
 #endif
 				);
 			if (stcb == NULL) {
 				/* Error is setup for us in the call */
 				goto out_unlocked;
 			}
 			if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
 				stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
 				/* Set the connected flag so we can queue data */
 				soisconnecting(so);
 			}
 			hold_tcblock = 1;
 			if (create_lock_applied) {
 				SCTP_ASOC_CREATE_UNLOCK(inp);
 				create_lock_applied = 0;
 			} else {
 				SCTP_PRINTF("Huh-3? create lock should have been on??\n");
 			}
 			/* Turn on queue only flag to prevent data from being sent */
 			queue_only = 1;
 			asoc = &stcb->asoc;
 			SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
 			(void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
 			/* initialize authentication params for the assoc */
 			sctp_initialize_auth_params(inp, stcb);
 			if (control) {
 				if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
 					sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_7);
 					hold_tcblock = 0;
 					stcb = NULL;
 					goto out_unlocked;
 				}
 			}
 			/* out with the INIT */
 			queue_only_for_init = 1;
 			/*-
 			 * we may want to dig in after this call and adjust the MTU
 			 * value. It defaulted to 1500 (constant) but the ro
 			 * structure may now have an update and thus we may need to
 			 * change it BEFORE we append the message.
 			 */
 		}
 	} else
 		asoc = &stcb->asoc;
 	if (srcv == NULL)
 		srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
 	if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
 		if (addr)
 			net = sctp_findnet(stcb, addr);
 		else
 			net = NULL;
 		if ((net == NULL) ||
 		    ((port != 0) && (port != stcb->rport))) {
 			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 			error = EINVAL;
 			goto out_unlocked;
 		}
 	} else {
 		if (stcb->asoc.alternate) {
 			net = stcb->asoc.alternate;
 		} else {
 			net = stcb->asoc.primary_destination;
 		}
 	}
 	atomic_add_int(&stcb->total_sends, 1);
 	/* Keep the stcb from being freed under our feet */
 	atomic_add_int(&asoc->refcnt, 1);
 	free_cnt_applied = 1;
 	if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
 		if (sndlen > asoc->smallest_mtu) {
 			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
 			error = EMSGSIZE;
 			goto out_unlocked;
 		}
 	}
 #if defined(__Userspace__)
 	if (inp->recv_callback) {
 		non_blocking = 1;
 	}
 #else
 	if (SCTP_SO_IS_NBIO(so)
 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
 	     || (flags & MSG_NBIO)
 #endif
 	    ) {
 		non_blocking = 1;
 	}
 #endif
 	/* would we block? */
 	if (non_blocking) {
 		if (hold_tcblock == 0) {
 			SCTP_TCB_LOCK(stcb);
 			hold_tcblock = 1;
 		}
 		inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
 		if ((SCTP_SB_LIMIT_SND(so) <  (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
 		    (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
 			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
 			if (sndlen > SCTP_SB_LIMIT_SND(so))
 				error = EMSGSIZE;
 			else
 				error = EWOULDBLOCK;
 			goto out_unlocked;
 		}
 		stcb->asoc.sb_send_resv += sndlen;
 		SCTP_TCB_UNLOCK(stcb);
 		hold_tcblock = 0;
 	} else {
 		atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
 	}
 	local_soresv = sndlen;
 	if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
 		error = ECONNRESET;
 		goto out_unlocked;
 	}
 	if (create_lock_applied) {
 		SCTP_ASOC_CREATE_UNLOCK(inp);
 		create_lock_applied = 0;
 	}
 	if (asoc->stream_reset_outstanding) {
 		/*
 		 * Can't queue any data while stream reset is underway.
 		 */
 		SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN);
 		error = EAGAIN;
 		goto out_unlocked;
 	}
 	if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
 	    (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
 		queue_only = 1;
 	}
 	/* we are now done with all control */
 	if (control) {
 		sctp_m_freem(control);
 		control = NULL;
 	}
 	if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
 	    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
 	    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
 	    (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
 		if (srcv->sinfo_flags & SCTP_ABORT) {
 			;
 		} else {
 			SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
 			error = ECONNRESET;
 			goto out_unlocked;
 		}
 	}
 	/* Ok, we will attempt a msgsnd :> */
 #if !(defined(__Panda__) || defined(__Windows__) || defined(__Userspace__))
 	if (p) {
 #if defined(__FreeBSD__) && __FreeBSD_version >= 603000
 		p->td_ru.ru_msgsnd++;
 #elif defined(__FreeBSD__) && __FreeBSD_version >= 500000
 		p->td_proc->p_stats->p_ru.ru_msgsnd++;
 #else
 		p->p_stats->p_ru.ru_msgsnd++;
 #endif
 	}
 #endif
 	/* Are we aborting? */
 	if (srcv->sinfo_flags & SCTP_ABORT) {
 		struct mbuf *mm;
 		int tot_demand, tot_out = 0, max_out;
 		SCTP_STAT_INCR(sctps_sends_with_abort);
 		if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
 		    (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
 			/* It has to be up before we abort */
 			/* how big is the user initiated abort? */
 			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 			error = EINVAL;
 			goto out;
 		}
 		if (hold_tcblock) {
 			SCTP_TCB_UNLOCK(stcb);
 			hold_tcblock = 0;
 		}
 		if (top) {
 			struct mbuf *cntm = NULL;
 			mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
 			if (sndlen != 0) {
 				for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
 					tot_out += SCTP_BUF_LEN(cntm);
 				}
 			}
 		} else {
 			/* Must fit in a MTU */
 			tot_out = sndlen;
 			tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
 			if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
 				/* To big */
 				SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
 				error = EMSGSIZE;
 				goto out;
 			}
 			mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
 		}
 		if (mm == NULL) {
 			SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
 			error = ENOMEM;
 			goto out;
 		}
 		max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
 		max_out -= sizeof(struct sctp_abort_msg);
 		if (tot_out > max_out) {
 			tot_out = max_out;
 		}
 		if (mm) {
 			struct sctp_paramhdr *ph;
 			/* now move forward the data pointer */
 			ph = mtod(mm, struct sctp_paramhdr *);
 			ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
 			ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out);
 			ph++;
 			SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
 			if (top == NULL) {
 #if defined(__APPLE__)
 				SCTP_SOCKET_UNLOCK(so, 0);
 #endif
 				error = uiomove((caddr_t)ph, (int)tot_out, uio);
 #if defined(__APPLE__)
 				SCTP_SOCKET_LOCK(so, 0);
 #endif
 				if (error) {
 					/*-
 					 * Here if we can't get his data we
 					 * still abort we just don't get to
 					 * send the users note :-0
 					 */
 					sctp_m_freem(mm);
 					mm = NULL;
 				}
 			} else {
 				if (sndlen != 0) {
 					SCTP_BUF_NEXT(mm) = top;
 				}
 			}
 		}
 		if (hold_tcblock == 0) {
 			SCTP_TCB_LOCK(stcb);
 		}
 		atomic_add_int(&stcb->asoc.refcnt, -1);
 		free_cnt_applied = 0;
 		/* release this lock, otherwise we hang on ourselves */
 		sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
 		/* now relock the stcb so everything is sane */
 		hold_tcblock = 0;
 		stcb = NULL;
 		/* In this case top is already chained to mm
 		 * avoid double free, since we free it below if
 		 * top != NULL and driver would free it after sending
 		 * the packet out
 		 */
 		if (sndlen != 0) {
 			top = NULL;
 		}
 		goto out_unlocked;
 	}
 	/* Calculate the maximum we can send */
 	inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
 	if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
 		if (non_blocking) {
 			/* we already checked for non-blocking above. */
 			max_len = sndlen;
 		} else {
 			max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
 		}
 	} else {
 		max_len = 0;
 	}
 	if (hold_tcblock) {
 		SCTP_TCB_UNLOCK(stcb);
 		hold_tcblock = 0;
 	}
 	/* Is the stream no. valid? */
 	if (srcv->sinfo_stream >= asoc->streamoutcnt) {
 		/* Invalid stream number */
 		SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 		error = EINVAL;
 		goto out_unlocked;
 	}
 	if (asoc->strmout == NULL) {
 		/* huh? software error */
 		SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
 		error = EFAULT;
 		goto out_unlocked;
 	}
 	/* Unless E_EOR mode is on, we must make a send FIT in one call. */
 	if ((user_marks_eor == 0) &&
 	    (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
 		/* It will NEVER fit */
 		SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
 		error = EMSGSIZE;
 		goto out_unlocked;
 	}
 	if ((uio == NULL) && user_marks_eor) {
 		/*-
 		 * We do not support eeor mode for
 		 * sending with mbuf chains (like sendfile).
 		 */
 		SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 		error = EINVAL;
 		goto out_unlocked;
 	}
 	if (user_marks_eor) {
 		local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
 	} else {
 		/*-
 		 * For non-eeor the whole message must fit in
 		 * the socket send buffer.
 		 */
 		local_add_more = sndlen;
 	}
 	len = 0;
 	if (non_blocking) {
 		goto skip_preblock;
 	}
 	if (((max_len <= local_add_more) &&
 	     (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
 	    (max_len == 0) ||
 	    ((stcb->asoc.chunks_on_out_queue+stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
 		/* No room right now ! */
 		SOCKBUF_LOCK(&so->so_snd);
 		inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
 		while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
 		       ((stcb->asoc.stream_queue_cnt+stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
 			SCTPDBG(SCTP_DEBUG_OUTPUT1,"pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
 			        (unsigned int)SCTP_SB_LIMIT_SND(so),
 			        inqueue_bytes,
 			        local_add_more,
 			        stcb->asoc.stream_queue_cnt,
 			        stcb->asoc.chunks_on_out_queue,
 			        SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
 			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
 				sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
 			}
 			be.error = 0;
 #if !defined(__Panda__) && !defined(__Windows__)
 			stcb->block_entry = &be;
 #endif
 			error = sbwait(&so->so_snd);
 			stcb->block_entry = NULL;
 			if (error || so->so_error || be.error) {
 				if (error == 0) {
 					if (so->so_error)
 						error = so->so_error;
 					if (be.error) {
 						error = be.error;
 					}
 				}
 				SOCKBUF_UNLOCK(&so->so_snd);
 				goto out_unlocked;
 			}
 			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
 				sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
 				               asoc, stcb->asoc.total_output_queue_size);
 			}
 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 				goto out_unlocked;
 			}
 			inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
 		}
 		if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
 			max_len = SCTP_SB_LIMIT_SND(so) -  inqueue_bytes;
 		} else {
 			max_len = 0;
 		}
 		SOCKBUF_UNLOCK(&so->so_snd);
 	}
 skip_preblock:
 	if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 		goto out_unlocked;
 	}
 #if defined(__APPLE__)
 	error = sblock(&so->so_snd, SBLOCKWAIT(flags));
 #endif
 	/* sndlen covers for mbuf case
 	 * uio_resid covers for the non-mbuf case
 	 * NOTE: uio will be null when top/mbuf is passed
 	 */
 	if (sndlen == 0) {
 		if (srcv->sinfo_flags & SCTP_EOF) {
 			got_all_of_the_send = 1;
 			goto dataless_eof;
 		} else {
 			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 			error = EINVAL;
 			goto out;
 		}
 	}
 	if (top == NULL) {
 		struct sctp_stream_queue_pending *sp;
 		struct sctp_stream_out *strm;
 		uint32_t sndout;
 		SCTP_TCB_SEND_LOCK(stcb);
 		if ((asoc->stream_locked) &&
 		    (asoc->stream_locked_on  != srcv->sinfo_stream)) {
 			SCTP_TCB_SEND_UNLOCK(stcb);
 			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 			error = EINVAL;
 			goto out;
 		}
 		SCTP_TCB_SEND_UNLOCK(stcb);
 		strm = &stcb->asoc.strmout[srcv->sinfo_stream];
 		if (strm->last_msg_incomplete == 0) {
 		do_a_copy_in:
 			sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
 			if ((sp == NULL) || (error)) {
 				goto out;
 			}
 			SCTP_TCB_SEND_LOCK(stcb);
 			if (sp->msg_is_complete) {
 				strm->last_msg_incomplete = 0;
 				asoc->stream_locked = 0;
 			} else {
 				/* Just got locked to this guy in
 				 * case of an interrupt.
 				 */
 				strm->last_msg_incomplete = 1;
 				asoc->stream_locked = 1;
 				asoc->stream_locked_on  = srcv->sinfo_stream;
 				sp->sender_all_done = 0;
 			}
 			sctp_snd_sb_alloc(stcb, sp->length);
 			atomic_add_int(&asoc->stream_queue_cnt, 1);
 			if (srcv->sinfo_flags & SCTP_UNORDERED) {
 				SCTP_STAT_INCR(sctps_sends_with_unord);
 			}
 			TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
 			stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
 			SCTP_TCB_SEND_UNLOCK(stcb);
 		} else {
 			SCTP_TCB_SEND_LOCK(stcb);
 			sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
 			SCTP_TCB_SEND_UNLOCK(stcb);
 			if (sp == NULL) {
 				/* ???? Huh ??? last msg is gone */
 #ifdef INVARIANTS
 				panic("Warning: Last msg marked incomplete, yet nothing left?");
 #else
 				SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
 				strm->last_msg_incomplete = 0;
 #endif
 				goto do_a_copy_in;
 			}
 		}
 #if defined(__APPLE__)
 #if defined(APPLE_LEOPARD)
 		while (uio->uio_resid > 0) {
 #else
 		while (uio_resid(uio) > 0) {
 #endif
 #else
 		while (uio->uio_resid > 0) {
 #endif
 			/* How much room do we have? */
 			struct mbuf *new_tail, *mm;
 			if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
 				max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
 			else
 				max_len = 0;
 			if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
 			    (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
 #if defined(__APPLE__)
 #if defined(APPLE_LEOPARD)
 			    (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
 #else
 			    (uio_resid(uio) && (uio_resid(uio) <= (int)max_len))) {
 #endif
 #else
 			    (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
 #endif
 				sndout = 0;
 				new_tail = NULL;
 				if (hold_tcblock) {
 					SCTP_TCB_UNLOCK(stcb);
 					hold_tcblock = 0;
 				}
 #if defined(__APPLE__)
 				SCTP_SOCKET_UNLOCK(so, 0);
 #endif
 #if defined(__FreeBSD__) && __FreeBSD_version > 602000
 				    mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
 #else
 				    mm = sctp_copy_resume(uio, max_len, &error, &sndout, &new_tail);
 #endif
 #if defined(__APPLE__)
 				SCTP_SOCKET_LOCK(so, 0);
 #endif
 				if ((mm == NULL) || error) {
 					if (mm) {
 						sctp_m_freem(mm);
 					}
 					goto out;
 				}
 				/* Update the mbuf and count */
 				SCTP_TCB_SEND_LOCK(stcb);
 				if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 					/* we need to get out.
 					 * Peer probably aborted.
 					 */
 					sctp_m_freem(mm);
 					if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
 						SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
 						error = ECONNRESET;
 					}
 					SCTP_TCB_SEND_UNLOCK(stcb);
 					goto out;
 				}
 				if (sp->tail_mbuf) {
 					/* tack it to the end */
 					SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
 					sp->tail_mbuf = new_tail;
 				} else {
 					/* A stolen mbuf */
 					sp->data = mm;
 					sp->tail_mbuf = new_tail;
 				}
 				sctp_snd_sb_alloc(stcb, sndout);
 				atomic_add_int(&sp->length,sndout);
 				len += sndout;
 				/* Did we reach EOR? */
 #if defined(__APPLE__)
 #if defined(APPLE_LEOPARD)
 				if ((uio->uio_resid == 0) &&
 #else
 				if ((uio_resid(uio) == 0) &&
 #endif
 #else
 				if ((uio->uio_resid == 0) &&
 #endif
 				    ((user_marks_eor == 0) ||
 				     (srcv->sinfo_flags & SCTP_EOF) ||
 				     (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
 					sp->msg_is_complete = 1;
 				} else {
 					sp->msg_is_complete = 0;
 				}
 				SCTP_TCB_SEND_UNLOCK(stcb);
 			}
 #if defined(__APPLE__)
 #if defined(APPLE_LEOPARD)
 			if (uio->uio_resid == 0) {
 #else
 			if (uio_resid(uio) == 0) {
 #endif
 #else
 			if (uio->uio_resid == 0) {
 #endif
 				/* got it all? */
 				continue;
 			}
 			/* PR-SCTP? */
 			if ((asoc->peer_supports_prsctp) && (asoc->sent_queue_cnt_removeable > 0)) {
 				/* This is ugly but we must assure locking order */
 				if (hold_tcblock == 0) {
 					SCTP_TCB_LOCK(stcb);
 					hold_tcblock = 1;
 				}
 				sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
 				inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
 				if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
 					max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
 				else
 					max_len = 0;
 				if (max_len > 0) {
 					continue;
 				}
 				SCTP_TCB_UNLOCK(stcb);
 				hold_tcblock = 0;
 			}
 			/* wait for space now */
 			if (non_blocking) {
 				/* Non-blocking io in place out */
 				goto skip_out_eof;
 			}
 			/* What about the INIT, send it maybe */
 			if (queue_only_for_init) {
 				if (hold_tcblock == 0) {
 					SCTP_TCB_LOCK(stcb);
 					hold_tcblock = 1;
 				}
 				if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
 					/* a collision took us forward? */
 					queue_only = 0;
 				} else {
 					sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
 					SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
 					queue_only = 1;
 				}
 			}
 			if ((net->flight_size > net->cwnd) &&
 			    (asoc->sctp_cmt_on_off == 0)) {
 				SCTP_STAT_INCR(sctps_send_cwnd_avoid);
 				queue_only = 1;
 			} else if (asoc->ifp_had_enobuf) {
 				SCTP_STAT_INCR(sctps_ifnomemqueued);
 				if (net->flight_size > (2 * net->mtu)) {
 					queue_only = 1;
 				}
 				asoc->ifp_had_enobuf = 0;
 			}
 			un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
 			           (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
 			if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
 			    (stcb->asoc.total_flight > 0) &&
 			    (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
 			    (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
 				/*-
 				 * Ok, Nagle is set on and we have data outstanding.
 				 * Don't send anything and let SACKs drive out the
 				 * data unless wen have a "full" segment to send.
 				 */
 				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
 					sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
 				}
 				SCTP_STAT_INCR(sctps_naglequeued);
 				nagle_applies = 1;
 			} else {
 				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
 					if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
 						sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
 				}
 				SCTP_STAT_INCR(sctps_naglesent);
 				nagle_applies = 0;
 			}
 			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
 				sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
 					       nagle_applies, un_sent);
 				sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
 					       stcb->asoc.total_flight,
 					       stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
 			}
 			if (queue_only_for_init)
 				queue_only_for_init = 0;
 			if ((queue_only == 0) && (nagle_applies == 0)) {
 				/*-
 				 * need to start chunk output
 				 * before blocking.. note that if
 				 * a lock is already applied, then
 				 * the input via the net is happening
 				 * and I don't need to start output :-D
 				 */
 				if (hold_tcblock == 0) {
 					if (SCTP_TCB_TRYLOCK(stcb)) {
 						hold_tcblock = 1;
 						sctp_chunk_output(inp,
 								  stcb,
 								  SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
 					}
 				} else {
 					sctp_chunk_output(inp,
 							  stcb,
 							  SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
 				}
 				if (hold_tcblock == 1) {
 					SCTP_TCB_UNLOCK(stcb);
 					hold_tcblock = 0;
 				}
 			}
 			SOCKBUF_LOCK(&so->so_snd);
 			/*-
 			 * This is a bit strange, but I think it will
 			 * work. The total_output_queue_size is locked and
 			 * protected by the TCB_LOCK, which we just released.
 			 * There is a race that can occur between releasing it
 			 * above, and me getting the socket lock, where sacks
 			 * come in but we have not put the SB_WAIT on the
 			 * so_snd buffer to get the wakeup. After the LOCK
 			 * is applied the sack_processing will also need to
 			 * LOCK the so->so_snd to do the actual sowwakeup(). So
 			 * once we have the socket buffer lock if we recheck the
 			 * size we KNOW we will get to sleep safely with the
 			 * wakeup flag in place.
 			 */
 			if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
 						      min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
 				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
 #if defined(__APPLE__)
 #if defined(APPLE_LEOPARD)
 					sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
 						       asoc, uio->uio_resid);
 #else
 					sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
 						       asoc, uio_resid(uio));
 #endif
 #else
 					sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
 						       asoc, uio->uio_resid);
 #endif
 				}
 				be.error = 0;
 #if !defined(__Panda__) && !defined(__Windows__)
 				stcb->block_entry = &be;
 #endif
 #if defined(__APPLE__)
 				sbunlock(&so->so_snd, 1);
 #endif
 				error = sbwait(&so->so_snd);
 				stcb->block_entry = NULL;
 				if (error || so->so_error || be.error) {
 					if (error == 0) {
 						if (so->so_error)
 							error = so->so_error;
 						if (be.error) {
 							error = be.error;
 						}
 					}
 					SOCKBUF_UNLOCK(&so->so_snd);
 					goto out_unlocked;
 				}
 #if defined(__APPLE__)
 				error = sblock(&so->so_snd, SBLOCKWAIT(flags));
 #endif
 				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
 					sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
 						       asoc, stcb->asoc.total_output_queue_size);
 				}
 			}
 			SOCKBUF_UNLOCK(&so->so_snd);
 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 				goto out_unlocked;
 			}
 		}
 		SCTP_TCB_SEND_LOCK(stcb);
 		if (sp) {
 			if (sp->msg_is_complete == 0) {
 				strm->last_msg_incomplete = 1;
 				asoc->stream_locked = 1;
 				asoc->stream_locked_on  = srcv->sinfo_stream;
 			} else {
 				sp->sender_all_done = 1;
 				strm->last_msg_incomplete = 0;
 				asoc->stream_locked = 0;
 			}
 		} else {
 			SCTP_PRINTF("Huh no sp TSNH?\n");
 			strm->last_msg_incomplete = 0;
 			asoc->stream_locked = 0;
 		}
 		SCTP_TCB_SEND_UNLOCK(stcb);
 #if defined(__APPLE__)
 #if defined(APPLE_LEOPARD)
 		if (uio->uio_resid == 0) {
 #else
 		if (uio_resid(uio) == 0) {
 #endif
 #else
 		if (uio->uio_resid == 0) {
 #endif
 			got_all_of_the_send = 1;
 		}
 	} else {
 		/* We send in a 0, since we do NOT have any locks */
 		error = sctp_msg_append(stcb, net, top, srcv, 0);
 		top = NULL;
 		if (srcv->sinfo_flags & SCTP_EOF) {
 			/*
 			 * This should only happen for Panda for the mbuf
 			 * send case, which does NOT yet support EEOR mode.
 			 * Thus, we can just set this flag to do the proper
 			 * EOF handling.
 			 */
 			got_all_of_the_send = 1;
 		}
 	}
 	if (error) {
 		goto out;
 	}
 dataless_eof:
 	/* EOF thing ? */
 	if ((srcv->sinfo_flags & SCTP_EOF) &&
 	    (got_all_of_the_send == 1)) {
 		int cnt;
 		SCTP_STAT_INCR(sctps_sends_with_eof);
 		error = 0;
 		if (hold_tcblock == 0) {
 			SCTP_TCB_LOCK(stcb);
 			hold_tcblock = 1;
 		}
 		cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
 		if (TAILQ_EMPTY(&asoc->send_queue) &&
 		    TAILQ_EMPTY(&asoc->sent_queue) &&
 		    (cnt == 0)) {
 			if (asoc->locked_on_sending) {
 				goto abort_anyway;
 			}
 			/* there is nothing queued to send, so I'm done... */
 			if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
 			    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
 			    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
 				struct sctp_nets *netp;
 				/* only send SHUTDOWN the first time through */
 				if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
 					SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 				}
 				SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
 				SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
 				sctp_stop_timers_for_shutdown(stcb);
 				if (stcb->asoc.alternate) {
 					netp = stcb->asoc.alternate;
 				} else {
 					netp = stcb->asoc.primary_destination;
 				}
 				sctp_send_shutdown(stcb, netp);
 				sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
 				                 netp);
 				sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
 				                 asoc->primary_destination);
 			}
 		} else {
 			/*-
 			 * we still got (or just got) data to send, so set
 			 * SHUTDOWN_PENDING
 			 */
 			/*-
 			 * XXX sockets draft says that SCTP_EOF should be
 			 * sent with no data.  currently, we will allow user
 			 * data to be sent first and move to
 			 * SHUTDOWN-PENDING
 			 */
 			if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
 			    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
 			    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
 				if (hold_tcblock == 0) {
 					SCTP_TCB_LOCK(stcb);
 					hold_tcblock = 1;
 				}
 				if (asoc->locked_on_sending) {
 					/* Locked to send out the data */
 					struct sctp_stream_queue_pending *sp;
 					sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
 					if (sp) {
 						if ((sp->length == 0) && (sp->msg_is_complete == 0))
 							asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
 					}
 				}
 				asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
 				if (TAILQ_EMPTY(&asoc->send_queue) &&
 				    TAILQ_EMPTY(&asoc->sent_queue) &&
 				    (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
 				abort_anyway:
 					if (free_cnt_applied) {
 						atomic_add_int(&stcb->asoc.refcnt, -1);
 						free_cnt_applied = 0;
 					}
 					sctp_abort_an_association(stcb->sctp_ep, stcb,
 					                          NULL, SCTP_SO_LOCKED);
 					/* now relock the stcb so everything is sane */
 					hold_tcblock = 0;
 					stcb = NULL;
 					goto out;
 				}
 				sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
 				                 asoc->primary_destination);
 				sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
 			}
 		}
 	}
 skip_out_eof:
 	if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
 		some_on_control = 1;
 	}
 	if (queue_only_for_init) {
 		if (hold_tcblock == 0) {
 			SCTP_TCB_LOCK(stcb);
 			hold_tcblock = 1;
 		}
 		if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
 			/* a collision took us forward? */
 			queue_only = 0;
 		} else {
 			sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
 			SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
 			queue_only = 1;
 		}
 	}
 	if ((net->flight_size > net->cwnd) &&
 	    (stcb->asoc.sctp_cmt_on_off == 0)) {
 		SCTP_STAT_INCR(sctps_send_cwnd_avoid);
 		queue_only = 1;
 	} else if (asoc->ifp_had_enobuf) {
 		SCTP_STAT_INCR(sctps_ifnomemqueued);
 		if (net->flight_size > (2 * net->mtu)) {
 			queue_only = 1;
 		}
 		asoc->ifp_had_enobuf = 0;
 	}
 	un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
 	           (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
 	if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
 	    (stcb->asoc.total_flight > 0) &&
 	    (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
 	    (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
 		/*-
 		 * Ok, Nagle is set on and we have data outstanding.
 		 * Don't send anything and let SACKs drive out the
 		 * data unless wen have a "full" segment to send.
 		 */
 		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
 			sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
 		}
 		SCTP_STAT_INCR(sctps_naglequeued);
 		nagle_applies = 1;
 	} else {
 		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
 			if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
 				sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
 		}
 		SCTP_STAT_INCR(sctps_naglesent);
 		nagle_applies = 0;
 	}
 	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
 		sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
 		               nagle_applies, un_sent);
 		sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
 		               stcb->asoc.total_flight,
 		               stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
 	}
 	if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
 		/* we can attempt to send too. */
 		if (hold_tcblock == 0) {
 			/* If there is activity recv'ing sacks no need to send */
 			if (SCTP_TCB_TRYLOCK(stcb)) {
 				sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
 				hold_tcblock = 1;
 			}
 		} else {
 			sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
 		}
 	} else if ((queue_only == 0) &&
 	           (stcb->asoc.peers_rwnd == 0) &&
 	           (stcb->asoc.total_flight == 0)) {
 		/* We get to have a probe outstanding */
 		if (hold_tcblock == 0) {
 			hold_tcblock = 1;
 			SCTP_TCB_LOCK(stcb);
 		}
 		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
 	} else if (some_on_control) {
 		int num_out, reason, frag_point;
 		/* Here we do control only */
 		if (hold_tcblock == 0) {
 			hold_tcblock = 1;
 			SCTP_TCB_LOCK(stcb);
 		}
 		frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
 		(void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
 		                            &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
 	}
 	SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
 	        queue_only, stcb->asoc.peers_rwnd, un_sent,
 		stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
 	        stcb->asoc.total_output_queue_size, error);
 out:
 #if defined(__APPLE__)
 	sbunlock(&so->so_snd, 1);
 #endif
 out_unlocked:
 	if (local_soresv && stcb) {
 		atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
 	}
 	if (create_lock_applied) {
 		SCTP_ASOC_CREATE_UNLOCK(inp);
 	}
 	if ((stcb) && hold_tcblock) {
 		SCTP_TCB_UNLOCK(stcb);
 	}
 	if (stcb && free_cnt_applied) {
 		atomic_add_int(&stcb->asoc.refcnt, -1);
 	}
 #ifdef INVARIANTS
 #if !defined(__APPLE__)
 	if (stcb) {
 		if (mtx_owned(&stcb->tcb_mtx)) {
 			panic("Leaving with tcb mtx owned?");
 		}
 		if (mtx_owned(&stcb->tcb_send_mtx)) {
 			panic("Leaving with tcb send mtx owned?");
 		}
 	}
 #endif
 #endif
 #ifdef __Panda__
 	/*
 	 * Handle the EAGAIN/ENOMEM cases to reattach the pak header
 	 * to particle when pak is passed in, so that caller
 	 * can try again with this pak
 	 *
 	 * NOTE: For other cases, including success case,
 	 * we simply want to return the header back to free
 	 * pool
 	 */
 	if (top) {
 		if ((error == EAGAIN) || (error == ENOMEM)) {
 			SCTP_ATTACH_CHAIN(i_pak, top, sndlen);
 			top = NULL;
 		} else {
 			(void)SCTP_RELEASE_HEADER(i_pak);
 		}
 	} else {
 		/* This is to handle cases when top has
 		 * been reset to NULL but pak might not
 		 * be freed
 		 */
 		if (i_pak) {
 			(void)SCTP_RELEASE_HEADER(i_pak);
 		}
 	}
 #endif
 #ifdef INVARIANTS
 	if (inp) {
 		sctp_validate_no_locks(inp);
 	} else {
 		SCTP_PRINTF("Warning - inp is NULL so cant validate locks\n");
 	}
 #endif
 	if (top) {
 		sctp_m_freem(top);
 	}
 	if (control) {
 		sctp_m_freem(control);
 	}
 	return (error);
 }
 /*
  * generate an AUTHentication chunk, if required
  */
 struct mbuf *
 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
     struct sctp_auth_chunk **auth_ret, uint32_t * offset,
     struct sctp_tcb *stcb, uint8_t chunk)
 {
 	struct mbuf *m_auth;
 	struct sctp_auth_chunk *auth;
 	int chunk_len;
 	struct mbuf *cn;
 	if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
 	    (stcb == NULL))
 		return (m);
 	/* sysctl disabled auth? */
 	if (SCTP_BASE_SYSCTL(sctp_auth_disable))
 		return (m);
 	/* peer doesn't do auth... */
 	if (!stcb->asoc.peer_supports_auth) {
 		return (m);
 	}
 	/* does the requested chunk require auth? */
 	if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
 		return (m);
 	}
 	m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
 	if (m_auth == NULL) {
 		/* no mbuf's */
 		return (m);
 	}
 	/* reserve some space if this will be the first mbuf */
 	if (m == NULL)
 		SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
 	/* fill in the AUTH chunk details */
 	auth = mtod(m_auth, struct sctp_auth_chunk *);
 	bzero(auth, sizeof(*auth));
 	auth->ch.chunk_type = SCTP_AUTHENTICATION;
 	auth->ch.chunk_flags = 0;
 	chunk_len = sizeof(*auth) +
 	    sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
 	auth->ch.chunk_length = htons(chunk_len);
 	auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
 	/* key id and hmac digest will be computed and filled in upon send */
 	/* save the offset where the auth was inserted into the chain */
 	*offset = 0;
 	for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
 		*offset += SCTP_BUF_LEN(cn);
 	}
 	/* update length and return pointer to the auth chunk */
 	SCTP_BUF_LEN(m_auth) = chunk_len;
 	m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
 	if (auth_ret != NULL)
 		*auth_ret = auth;
 	return (m);
 }
 #if defined(__FreeBSD__)  || defined(__APPLE__)
 #ifdef INET6
 int
 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t *ro)
 {
 	struct nd_prefix *pfx = NULL;
 	struct nd_pfxrouter *pfxrtr = NULL;
 	struct sockaddr_in6 gw6;
 	if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
 		return (0);
 	/* get prefix entry of address */
 	LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
 		if (pfx->ndpr_stateflags & NDPRF_DETACHED)
 			continue;
 		if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
 		    &src6->sin6_addr, &pfx->ndpr_mask))
 			break;
 	}
 	/* no prefix entry in the prefix list */
 	if (pfx == NULL) {
 		SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
 		SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
 		return (0);
 	}
 	SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
 	SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
 	/* search installed gateway from prefix entry */
 	LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
 		memset(&gw6, 0, sizeof(struct sockaddr_in6));
 		gw6.sin6_family = AF_INET6;
 #ifdef HAVE_SIN6_LEN
 		gw6.sin6_len = sizeof(struct sockaddr_in6);
 #endif
 		memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
 		    sizeof(struct in6_addr));
 		SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
 		SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
 		SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
 		SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
 		if (sctp_cmpaddr((struct sockaddr *)&gw6,
 				ro->ro_rt->rt_gateway)) {
 			SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
 			return (1);
 		}
 	}
 	SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
 	return (0);
 }
 #endif
 int
 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t *ro)
 {
 #ifdef INET
 	struct sockaddr_in *sin, *mask;
 	struct ifaddr *ifa;
 	struct in_addr srcnetaddr, gwnetaddr;
 	if (ro == NULL || ro->ro_rt == NULL ||
 	    sifa->address.sa.sa_family != AF_INET) {
 		return (0);
 	}
 	ifa = (struct ifaddr *)sifa->ifa;
 	mask = (struct sockaddr_in *)(ifa->ifa_netmask);
 	sin = (struct sockaddr_in *)&sifa->address.sin;
 	srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
 	SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
 	SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
 	SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
 	sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
 	gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
 	SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
 	SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
 	SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
 	if (srcnetaddr.s_addr == gwnetaddr.s_addr) {
 		return (1);
 	}
 #endif
 	return (0);
 }
 #elif defined(__Userspace__)
 /* TODO __Userspace__ versions of sctp_vXsrc_match_nexthop(). */
 int
 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t *ro)
 {
     return (0);
 }
 int
 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t *ro)
 {
     return (0);
 }
 #endif

The Tor Browser / annotate

netwerk/sctp/src/netinet/sctp_output.c@4ab42b5ab56c (annotated)

netwerk/sctp/src/netinet/sctp_output.c