parse_reply-test.c [plain text]
#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;
#else
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
}