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