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
segv_handler(int sig)71 segv_handler(int sig)
72 {
73 val = 1;
74 }
75
76 int
main(int argc,char ** argv)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