parse_reply-test.c revision 178825 
1/*
2 * Copyright (c) 2002 Kungliga Tekniska H�gskolan
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#ifdef HAVE_CONFIG_H
35#include <config.h>
36RCSID("$Id: parse_reply-test.c 15287 2005-05-29 21:21:12Z lha $");
37#endif
38
39#include <sys/types.h>
40#ifdef HAVE_SYS_MMAN_H
41#include <sys/mman.h>
42#endif
43#include <fcntl.h>
44
45#include "roken.h"
46#include "resolve.h"
47
48struct dns_reply*
49parse_reply(const unsigned char *, size_t);
50
51enum { MAX_BUF = 36};
52
53static struct testcase {
54    unsigned char buf[MAX_BUF];
55    size_t buf_len;
56} tests[] = {
57    {{0x12, 0x67, 0x84, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
58     0x03, 'f', 'o', 'o', 0x00,
59     0x00, 0x10, 0x00, 0x01,
60     0x03, 'f', 'o', 'o', 0x00,
61     0x00, 0x10, 0x00, 0x01,
62      0x00, 0x00, 0x12, 0x67, 0xff, 0xff}, 36}
63};
64
65#ifndef MAP_FAILED
66#define MAP_FAILED (-1)
67#endif
68
69static sig_atomic_t val = 0;
70
71static RETSIGTYPE
72segv_handler(int sig)
73{
74    val = 1;
75}
76
77int
78main(int argc, char **argv)
79{
80#ifndef HAVE_MMAP
81    return 77;			/* signal to automake that this test
82                                   cannot be run */
83#else /* HAVE_MMAP */
84    int ret;
85    int i;
86    struct sigaction sa;
87
88    sigemptyset (&sa.sa_mask);
89    sa.sa_flags = 0;
90    sa.sa_handler = segv_handler;
91    sigaction (SIGSEGV, &sa, NULL);
92
93    for (i = 0; val == 0 && i < sizeof(tests)/sizeof(tests[0]); ++i) {
94	const struct testcase *t = &tests[i];
95	unsigned char *p1, *p2;
96	int flags;
97	int fd;
98	size_t pagesize = getpagesize();
99	unsigned char *buf;
100
101#ifdef MAP_ANON
102	flags = MAP_ANON;
103	fd = -1;
104#else
105	flags = 0;
106	fd = open ("/dev/zero", O_RDONLY);
107	if(fd < 0)
108	    err (1, "open /dev/zero");
109#endif
110	flags |= MAP_PRIVATE;
111
112	p1 = (unsigned char *)mmap(0, 2 * pagesize, PROT_READ | PROT_WRITE,
113		  flags, fd, 0);
114	if (p1 == (unsigned char *)MAP_FAILED)
115	    err (1, "mmap");
116	p2 = p1 + pagesize;
117	ret = mprotect ((void *)p2, pagesize, 0);
118	if (ret < 0)
119	    err (1, "mprotect");
120	buf = p2 - t->buf_len;
121	memcpy (buf, t->buf, t->buf_len);
122	parse_reply (buf, t->buf_len);
123	ret = munmap ((void *)p1, 2 * pagesize);
124	if (ret < 0)
125	    err (1, "munmap");
126    }
127    return val;
128#endif /* HAVE_MMAP */
129}
130