114 lines
3.4 KiB
C
114 lines
3.4 KiB
C
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/*-
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* Copyright (c) 2009-2010 Brad Penoff
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* Copyright (c) 2009-2010 Humaira Kamal
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* Copyright (c) 2011-2012 Irene Ruengeler
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* Copyright (c) 2011-2012 Michael Tuexen
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* __Userspace__ */
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#include <stdlib.h>
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#if !defined (__Userspace_os_Windows)
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#include <stdint.h>
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#include <netinet/sctp_os_userspace.h>
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#endif
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#include <user_environment.h>
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#include <sys/types.h>
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/* #include <sys/param.h> defines MIN */
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#if !defined(MIN)
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#define MIN(arg1,arg2) ((arg1) < (arg2) ? (arg1) : (arg2))
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#endif
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#include <string.h>
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#define uHZ 1000
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/* See user_include/user_environment.h for comments about these variables */
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int maxsockets = 25600;
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int hz = uHZ;
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int ip_defttl = 64;
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int ipport_firstauto = 49152, ipport_lastauto = 65535;
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int nmbclusters = 65536;
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/* Source ip_output.c. extern'd in ip_var.h */
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u_short ip_id = 0; /*__Userspace__ TODO Should it be initialized to zero? */
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/* used in user_include/user_atomic.h in order to make the operations
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* defined there truly atomic
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*/
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userland_mutex_t atomic_mtx;
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/* If the entropy device is not loaded, make a token effort to
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* provide _some_ kind of randomness. This should only be used
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* inside other RNG's, like arc4random(9).
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*/
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#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
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static int
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read_random_phony(void *buf, int count)
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{
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memset(buf, 'A', count);
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return (count);
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}
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#else
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#if defined(__Userspace_os_FreeBSD) || defined(__Userspace_os_Darwin)
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static int
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read_random_phony(void *buf, int count)
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{
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if (count >= 0) {
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arc4random_buf(buf, count);
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}
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return (count);
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}
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#else
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static int
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read_random_phony(void *buf, int count)
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{
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uint32_t randval;
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int size, i;
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/* srandom() is called in kern/init_main.c:proc0_post() */
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/* Fill buf[] with random(9) output */
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for (i = 0; i < count; i+= (int)sizeof(uint32_t)) {
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randval = random();
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size = MIN(count - i, (int)sizeof(uint32_t));
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memcpy(&((char *)buf)[i], &randval, (size_t)size);
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}
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return (count);
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}
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#endif
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#endif
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static int (*read_func)(void *, int) = read_random_phony;
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/* Userland-visible version of read_random */
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int
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read_random(void *buf, int count)
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{
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return ((*read_func)(buf, count));
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}
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