1 /* $NetBSD: parse_reply-test.c,v 1.1.1.1 2011/04/13 18:15:42 elric Exp $ */ 2 3 /* 4 * Copyright (c) 2002 Kungliga Tekniska Högskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <config.h> 37 38 #include <sys/types.h> 39 #ifdef HAVE_SYS_MMAN_H 40 #include <sys/mman.h> 41 #endif 42 #include <fcntl.h> 43 44 #include <krb5/roken.h> 45 #include <krb5/resolve.h> 46 47 struct dns_reply* 48 parse_reply(const unsigned char *, size_t); 49 50 enum { MAX_BUF = 36}; 51 52 static struct testcase { 53 unsigned char buf[MAX_BUF]; 54 size_t buf_len; 55 } tests[] = { 56 {{0x12, 0x67, 0x84, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 57 0x03, 'f', 'o', 'o', 0x00, 58 0x00, 0x10, 0x00, 0x01, 59 0x03, 'f', 'o', 'o', 0x00, 60 0x00, 0x10, 0x00, 0x01, 61 0x00, 0x00, 0x12, 0x67, 0xff, 0xff}, 36} 62 }; 63 64 #ifndef MAP_FAILED 65 #define MAP_FAILED (-1) 66 #endif 67 68 static sig_atomic_t val = 0; 69 70 static RETSIGTYPE 71 segv_handler(int sig) 72 { 73 val = 1; 74 } 75 76 int 77 main(int argc, char **argv) 78 { 79 #ifndef HAVE_MMAP 80 return 77; /* signal to automake that this test 81 cannot be run */ 82 #else /* HAVE_MMAP */ 83 int ret; 84 int i; 85 struct sigaction sa; 86 87 sigemptyset (&sa.sa_mask); 88 sa.sa_flags = 0; 89 sa.sa_handler = segv_handler; 90 sigaction (SIGSEGV, &sa, NULL); 91 92 for (i = 0; val == 0 && i < sizeof(tests)/sizeof(tests[0]); ++i) { 93 const struct testcase *t = &tests[i]; 94 unsigned char *p1, *p2; 95 int flags; 96 int fd; 97 size_t pagesize = getpagesize(); 98 unsigned char *buf; 99 100 #ifdef MAP_ANON 101 flags = MAP_ANON; 102 fd = -1; 103 #else 104 flags = 0; 105 fd = open ("/dev/zero", O_RDONLY); 106 if(fd < 0) 107 err (1, "open /dev/zero"); 108 #endif 109 flags |= MAP_PRIVATE; 110 111 p1 = (unsigned char *)mmap(0, 2 * pagesize, PROT_READ | PROT_WRITE, 112 flags, fd, 0); 113 if (p1 == (unsigned char *)MAP_FAILED) 114 err (1, "mmap"); 115 p2 = p1 + pagesize; 116 ret = mprotect ((void *)p2, pagesize, 0); 117 if (ret < 0) 118 err (1, "mprotect"); 119 buf = p2 - t->buf_len; 120 memcpy (buf, t->buf, t->buf_len); 121 parse_reply (buf, t->buf_len); 122 ret = munmap ((void *)p1, 2 * pagesize); 123 if (ret < 0) 124 err (1, "munmap"); 125 } 126 return val; 127 #endif /* HAVE_MMAP */ 128 } 129