1 /*- 2 * Copyright (c) 2009-2010 Brad Penoff 3 * Copyright (c) 2009-2010 Humaira Kamal 4 * Copyright (c) 2011-2012 Irene Ruengeler 5 * Copyright (c) 2011-2012 Michael Tuexen 6 * 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 /* __Userspace__ */ 32 33 #include <stdlib.h> 34 #if !defined (__Userspace_os_Windows) 35 #include <stdint.h> 36 #include <netinet/sctp_os_userspace.h> 37 #endif 38 #include <user_environment.h> 39 #include <sys/types.h> 40 /* #include <sys/param.h> defines MIN */ 41 #if !defined(MIN) 42 #define MIN(arg1,arg2) ((arg1) < (arg2) ? (arg1) : (arg2)) 43 #endif 44 #include <string.h> 45 46 #define uHZ 1000 47 48 /* See user_include/user_environment.h for comments about these variables */ 49 int maxsockets = 25600; 50 int hz = uHZ; 51 int ip_defttl = 64; 52 int ipport_firstauto = 49152, ipport_lastauto = 65535; 53 int nmbclusters = 65536; 54 55 /* Source ip_output.c. extern'd in ip_var.h */ 56 u_short ip_id = 0; /*__Userspace__ TODO Should it be initialized to zero? */ 57 58 /* used in user_include/user_atomic.h in order to make the operations 59 * defined there truly atomic 60 */ 61 userland_mutex_t atomic_mtx; 62 63 /* Source: /usr/src/sys/dev/random/harvest.c */ 64 static int read_random_phony(void *, int); 65 66 static int (*read_func)(void *, int) = read_random_phony; 67 68 /* Userland-visible version of read_random */ 69 int 70 read_random(void *buf, int count) 71 { 72 return ((*read_func)(buf, count)); 73 } 74 75 /* If the entropy device is not loaded, make a token effort to 76 * provide _some_ kind of randomness. This should only be used 77 * inside other RNG's, like arc4random(9). 78 */ 79 static int 80 read_random_phony(void *buf, int count) 81 { 82 uint32_t randval; 83 int size, i; 84 85 /* srandom() is called in kern/init_main.c:proc0_post() */ 86 87 /* Fill buf[] with random(9) output */ 88 for (i = 0; i < count; i+= (int)sizeof(uint32_t)) { 89 randval = random(); 90 size = MIN(count - i, (int)sizeof(uint32_t)); 91 memcpy(&((char *)buf)[i], &randval, (size_t)size); 92 } 93 94 return (count); 95 } 96 97
