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