michael@0: /*-
michael@0:  * Copyright (c) 2009-2010 Brad Penoff
michael@0:  * Copyright (c) 2009-2010 Humaira Kamal
michael@0:  * Copyright (c) 2011-2012 Irene Ruengeler
michael@0:  * Copyright (c) 2011-2012 Michael Tuexen
michael@0:  *
michael@0:  * All rights reserved.
michael@0:  *
michael@0:  * Redistribution and use in source and binary forms, with or without
michael@0:  * modification, are permitted provided that the following conditions
michael@0:  * are met:
michael@0:  * 1. Redistributions of source code must retain the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer.
michael@0:  * 2. Redistributions in binary form must reproduce the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer in the
michael@0:  *    documentation and/or other materials provided with the distribution.
michael@0:  *
michael@0:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
michael@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
michael@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
michael@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
michael@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
michael@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
michael@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
michael@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
michael@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
michael@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
michael@0:  * SUCH DAMAGE.
michael@0:  */
michael@0: 
michael@0: /* __Userspace__ */
michael@0: 
michael@0: #include <stdlib.h>
michael@0: #if !defined (__Userspace_os_Windows)
michael@0: #include <stdint.h>
michael@0: #include <netinet/sctp_os_userspace.h>
michael@0: #endif
michael@0: #include <user_environment.h>
michael@0: #include <sys/types.h>
michael@0: /* #include <sys/param.h> defines MIN */
michael@0: #if !defined(MIN)
michael@0: #define MIN(arg1,arg2) ((arg1) < (arg2) ? (arg1) : (arg2))
michael@0: #endif
michael@0: #include <string.h>
michael@0: 
michael@0: #define uHZ 1000
michael@0: 
michael@0: /* See user_include/user_environment.h for comments about these variables */
michael@0: int maxsockets = 25600;
michael@0: int hz = uHZ;
michael@0: int ip_defttl = 64;
michael@0: int ipport_firstauto = 49152, ipport_lastauto = 65535;
michael@0: int nmbclusters = 65536;
michael@0: 
michael@0: /* Source ip_output.c. extern'd in ip_var.h */
michael@0: u_short ip_id = 0; /*__Userspace__ TODO Should it be initialized to zero? */
michael@0: 
michael@0: /* used in user_include/user_atomic.h in order to make the operations
michael@0:  * defined there truly atomic
michael@0:  */
michael@0: userland_mutex_t atomic_mtx;
michael@0: 
michael@0: /* Source: /usr/src/sys/dev/random/harvest.c */
michael@0: static int read_random_phony(void *, int);
michael@0: 
michael@0: static int (*read_func)(void *, int) = read_random_phony;
michael@0: 
michael@0: /* Userland-visible version of read_random */
michael@0: int
michael@0: read_random(void *buf, int count)
michael@0: {
michael@0: 	return ((*read_func)(buf, count));
michael@0: }
michael@0: 
michael@0: /* If the entropy device is not loaded, make a token effort to
michael@0:  * provide _some_ kind of randomness. This should only be used
michael@0:  * inside other RNG's, like arc4random(9).
michael@0:  */
michael@0: static int
michael@0: read_random_phony(void *buf, int count)
michael@0: {
michael@0: 	uint32_t randval;
michael@0: 	int size, i;
michael@0: 
michael@0: 	/* srandom() is called in kern/init_main.c:proc0_post() */
michael@0: 
michael@0: 	/* Fill buf[] with random(9) output */
michael@0: 	for (i = 0; i < count; i+= (int)sizeof(uint32_t)) {
michael@0: 		randval = random();
michael@0: 		size = MIN(count - i, (int)sizeof(uint32_t));
michael@0: 		memcpy(&((char *)buf)[i], &randval, (size_t)size);
michael@0: 	}
michael@0: 
michael@0: 	return (count);
michael@0: }
michael@0: