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 /*-

  * Copyright (c) 2001-2007, 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/sctputil.h 243186 2012-11-17 20:04:04Z tuexen $");

 #endif

 #ifndef _NETINET_SCTP_UTIL_H_

 #define _NETINET_SCTP_UTIL_H_

 #if defined(_KERNEL) || defined(__Userspace__)

 #define SCTP_READ_LOCK_HELD 1

 #define SCTP_READ_LOCK_NOT_HELD 0

 #ifdef SCTP_ASOCLOG_OF_TSNS

 void sctp_print_out_track_log(struct sctp_tcb *stcb);

 #endif

 #ifdef SCTP_MBUF_LOGGING

 struct mbuf *sctp_m_free(struct mbuf *m);

 void sctp_m_freem(struct mbuf *m);

 #else

 #define sctp_m_free m_free

 #define sctp_m_freem m_freem

 #endif

 #if defined(SCTP_LOCAL_TRACE_BUF) || defined(__APPLE__)

 void

 sctp_log_trace(uint32_t fr, const char *str SCTP_UNUSED, uint32_t a, uint32_t b, uint32_t c, uint32_t d, uint32_t e, uint32_t f);

 #endif

 #define sctp_get_associd(stcb) ((sctp_assoc_t)stcb->asoc.assoc_id)

 /*

  * Function prototypes

  */

 uint32_t

 sctp_get_ifa_hash_val(struct sockaddr *addr);

 struct sctp_ifa *

 sctp_find_ifa_in_ep(struct sctp_inpcb *inp, struct sockaddr *addr, int hold_lock);

 struct sctp_ifa *

 sctp_find_ifa_by_addr(struct sockaddr *addr, uint32_t vrf_id, int holds_lock);

 uint32_t sctp_select_initial_TSN(struct sctp_pcb *);

 uint32_t sctp_select_a_tag(struct sctp_inpcb *, uint16_t lport, uint16_t rport, int);

 int sctp_init_asoc(struct sctp_inpcb *, struct sctp_tcb *, uint32_t, uint32_t);

 void sctp_fill_random_store(struct sctp_pcb *);

 void

 sctp_notify_stream_reset_add(struct sctp_tcb *stcb, uint16_t numberin,

 			     uint16_t numberout, int flag);

 void

 sctp_notify_stream_reset_tsn(struct sctp_tcb *stcb, uint32_t sending_tsn, uint32_t recv_tsn, int flag);

 void

 sctp_timer_start(int, struct sctp_inpcb *, struct sctp_tcb *,

     struct sctp_nets *);

 void

 sctp_timer_stop(int, struct sctp_inpcb *, struct sctp_tcb *,

     struct sctp_nets *, uint32_t);

 int

 sctp_dynamic_set_primary(struct sockaddr *sa, uint32_t vrf_id);

 void

 sctp_mtu_size_reset(struct sctp_inpcb *, struct sctp_association *, uint32_t);

 void

 sctp_add_to_readq(struct sctp_inpcb *inp,

     struct sctp_tcb *stcb,

     struct sctp_queued_to_read *control,

     struct sockbuf *sb,

     int end,

     int inpread_locked,

     int so_locked

 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)

     SCTP_UNUSED

 #endif

     );

 int

 sctp_append_to_readq(struct sctp_inpcb *inp,

     struct sctp_tcb *stcb,

     struct sctp_queued_to_read *control,

     struct mbuf *m,

     int end,

     int new_cumack,

     struct sockbuf *sb);

 void sctp_iterator_worker(void);

 uint32_t sctp_get_prev_mtu(uint32_t);

 uint32_t sctp_get_next_mtu(uint32_t);

 void

 sctp_timeout_handler(void *);

 uint32_t

 sctp_calculate_rto(struct sctp_tcb *, struct sctp_association *,

     struct sctp_nets *, struct timeval *, int, int);

 uint32_t sctp_calculate_len(struct mbuf *);

 caddr_t sctp_m_getptr(struct mbuf *, int, int, uint8_t *);

 struct sctp_paramhdr *

 sctp_get_next_param(struct mbuf *, int,

     struct sctp_paramhdr *, int);

 int sctp_add_pad_tombuf(struct mbuf *, int);

 int sctp_pad_lastmbuf(struct mbuf *, int, struct mbuf *);

 void sctp_ulp_notify(uint32_t, struct sctp_tcb *, uint32_t, void *, int

 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)

     SCTP_UNUSED

 #endif

     );

 void

 sctp_pull_off_control_to_new_inp(struct sctp_inpcb *old_inp,

     struct sctp_inpcb *new_inp,

     struct sctp_tcb *stcb, int waitflags);

 void sctp_stop_timers_for_shutdown(struct sctp_tcb *);

 void sctp_report_all_outbound(struct sctp_tcb *, uint16_t, int, int

 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)

     SCTP_UNUSED

 #endif

     );

 int sctp_expand_mapping_array(struct sctp_association *, uint32_t);

 void sctp_abort_notification(struct sctp_tcb *, uint8_t, uint16_t,

 			     struct sctp_abort_chunk *, int

 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)

     SCTP_UNUSED

 #endif

     );

 /* We abort responding to an IP packet for some reason */

 void

 sctp_abort_association(struct sctp_inpcb *, struct sctp_tcb *, struct mbuf *,

                        int, struct sockaddr *, struct sockaddr *,

                        struct sctphdr *, struct mbuf *,

 #if defined(__FreeBSD__)

                        uint8_t, uint32_t,

 #endif

                        uint32_t, uint16_t);

 /* We choose to abort via user input */

 void

 sctp_abort_an_association(struct sctp_inpcb *, struct sctp_tcb *,

     struct mbuf *, int

 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)

     SCTP_UNUSED

 #endif

 );

 void sctp_handle_ootb(struct mbuf *, int, int,

                       struct sockaddr *, struct sockaddr *,

                       struct sctphdr *, struct sctp_inpcb *,

 #if defined(__FreeBSD__)

                       uint8_t, uint32_t,

 #endif

                       uint32_t, uint16_t);

 int sctp_connectx_helper_add(struct sctp_tcb *stcb, struct sockaddr *addr,

     int totaddr, int *error);

 struct sctp_tcb *

 sctp_connectx_helper_find(struct sctp_inpcb *inp, struct sockaddr *addr,

     int *totaddr, int *num_v4, int *num_v6, int *error, int limit, int *bad_addr);

 int sctp_is_there_an_abort_here(struct mbuf *, int, uint32_t *);

 #ifdef INET6

 uint32_t sctp_is_same_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);

 #if defined(SCTP_EMBEDDED_V6_SCOPE)

 struct sockaddr_in6 *

 sctp_recover_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);

 #ifdef SCTP_KAME

 #define sctp_recover_scope_mac(addr, store) do { \

 	 if ((addr->sin6_family == AF_INET6) && \

 	     (IN6_IS_SCOPE_LINKLOCAL(&addr->sin6_addr))) { \

 		*store = *addr; \

 		if (addr->sin6_scope_id == 0) { \

 			if (!sa6_recoverscope(store)) { \

 				addr = store; \

 			} \

 		} else { \

 			in6_clearscope(&addr->sin6_addr); \

 			addr = store; \

 		} \

 	 } \

 } while (0)

 #else

 #define sctp_recover_scope_mac(addr, store) do { \

 	 if ((addr->sin6_family == AF_INET6) && \

 	     (IN6_IS_SCOPE_LINKLOCAL(&addr->sin6_addr))) { \

 		*store = *addr; \

 	 	if (addr->sin6_scope_id == 0) { \

 			if (!in6_recoverscope(store, &store->sin6_addr, \

 					      NULL)) { \

 				addr = store; \

 			} \

 		} else { \

 			in6_clearscope(&addr->sin6_addr); \

 			addr = store; \

 		} \

 	 } \

 } while (0)

 #endif

 #endif

 #endif

 int sctp_cmpaddr(struct sockaddr *, struct sockaddr *);

 void sctp_print_address(struct sockaddr *);

 int

 sctp_release_pr_sctp_chunk(struct sctp_tcb *, struct sctp_tmit_chunk *,

     uint8_t, int

 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)

     SCTP_UNUSED

 #endif

 );

 struct mbuf *sctp_generate_invmanparam(int);

 void sctp_bindx_add_address(struct socket *so, struct sctp_inpcb *inp,

 			    struct sockaddr *sa, sctp_assoc_t assoc_id,

 			    uint32_t vrf_id, int *error, void *p);

 void sctp_bindx_delete_address(struct sctp_inpcb *inp,

 			       struct sockaddr *sa, sctp_assoc_t assoc_id,

 			       uint32_t vrf_id, int *error);

 int sctp_local_addr_count(struct sctp_tcb *stcb);

 #ifdef SCTP_MBCNT_LOGGING

 void

 sctp_free_bufspace(struct sctp_tcb *, struct sctp_association *,

     struct sctp_tmit_chunk *, int);

 #else

 #define sctp_free_bufspace(stcb, asoc, tp1, chk_cnt)  \

 do { \

 	if (tp1->data != NULL) { \

                 atomic_subtract_int(&((asoc)->chunks_on_out_queue), chk_cnt); \

 		if ((asoc)->total_output_queue_size >= tp1->book_size) { \

 			atomic_subtract_int(&((asoc)->total_output_queue_size), tp1->book_size); \

 		} else { \

 			(asoc)->total_output_queue_size = 0; \

 		} \

    	        if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \

 	            (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \

 			if (stcb->sctp_socket->so_snd.sb_cc >= tp1->book_size) { \

 				atomic_subtract_int(&((stcb)->sctp_socket->so_snd.sb_cc), tp1->book_size); \

 			} else { \

 				stcb->sctp_socket->so_snd.sb_cc = 0; \

 			} \

 		} \

         } \

 } while (0)

 #endif

 #define sctp_free_spbufspace(stcb, asoc, sp)  \

 do { \

  	if (sp->data != NULL) { \

 		if ((asoc)->total_output_queue_size >= sp->length) { \

 			atomic_subtract_int(&(asoc)->total_output_queue_size, sp->length); \

 		} else { \

 			(asoc)->total_output_queue_size = 0; \

 		} \

    	        if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \

 	            (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \

 			if (stcb->sctp_socket->so_snd.sb_cc >= sp->length) { \

 				atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc,sp->length); \

 			} else { \

 				stcb->sctp_socket->so_snd.sb_cc = 0; \

 			} \

 		} \

         } \

 } while (0)

 #define sctp_snd_sb_alloc(stcb, sz)  \

 do { \

 	atomic_add_int(&stcb->asoc.total_output_queue_size,sz); \

 	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_add_int(&stcb->sctp_socket->so_snd.sb_cc,sz); \

 	} \

 } while (0)

 /* functions to start/stop udp tunneling */

 #if defined(__APPLE__) || defined(__FreeBSD__)

 void sctp_over_udp_stop(void);

 int sctp_over_udp_start(void);

 #endif

 #if defined(__Windows__)

 void sctp_over_udp_restart(void);

 #endif

 int

 sctp_soreceive(struct socket *so, struct sockaddr **psa,

     struct uio *uio,

     struct mbuf **mp0,

     struct mbuf **controlp,

     int *flagsp);

 void

 sctp_misc_ints(uint8_t from, uint32_t a, uint32_t b, uint32_t c, uint32_t d);

 void

 sctp_wakeup_log(struct sctp_tcb *stcb,

     uint32_t wake_cnt, int from);

 void sctp_log_strm_del_alt(struct sctp_tcb *stcb, uint32_t, uint16_t, uint16_t, int);

 void sctp_log_nagle_event(struct sctp_tcb *stcb, int action);

 void

 sctp_log_mb(struct mbuf *m, int from);

 void

 sctp_sblog(struct sockbuf *sb,

     struct sctp_tcb *stcb, int from, int incr);

 void

 sctp_log_strm_del(struct sctp_queued_to_read *control,

     struct sctp_queued_to_read *poschk,

     int from);

 void sctp_log_cwnd(struct sctp_tcb *stcb, struct sctp_nets *, int, uint8_t);

 void rto_logging(struct sctp_nets *net, int from);

 void sctp_log_closing(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int16_t loc);

 void sctp_log_lock(struct sctp_inpcb *inp, struct sctp_tcb *stcb, uint8_t from);

 void sctp_log_maxburst(struct sctp_tcb *stcb, struct sctp_nets *, int, int, uint8_t);

 void sctp_log_block(uint8_t, struct sctp_association *, int);

 void sctp_log_rwnd(uint8_t, uint32_t, uint32_t, uint32_t);

 void sctp_log_mbcnt(uint8_t, uint32_t, uint32_t, uint32_t, uint32_t);

 void sctp_log_rwnd_set(uint8_t, uint32_t, uint32_t, uint32_t, uint32_t);

 int sctp_fill_stat_log(void *, size_t *);

 void sctp_log_fr(uint32_t, uint32_t, uint32_t, int);

 void sctp_log_sack(uint32_t, uint32_t, uint32_t, uint16_t, uint16_t, int);

 void sctp_log_map(uint32_t, uint32_t, uint32_t, int);

 void sctp_print_mapping_array(struct sctp_association *asoc);

 void sctp_clr_stat_log(void);

 #ifdef SCTP_AUDITING_ENABLED

 void

 sctp_auditing(int, struct sctp_inpcb *, struct sctp_tcb *,

     struct sctp_nets *);

 void sctp_audit_log(uint8_t, uint8_t);

 #endif

 #endif				/* _KERNEL */

 #endif