1/*	$NetBSD$	*/
2
3/*
4 * Copyright (c) 2002 Kungliga Tekniska H��gskolan
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
47struct dns_reply*
48parse_reply(const unsigned char *, size_t);
49
50enum { MAX_BUF = 36};
51
52static 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
68static sig_atomic_t val = 0;
69
70static RETSIGTYPE
71segv_handler(int sig)
72{
73    val = 1;
74}
75
76int
77main(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