lib/roken/parse_reply-test.c

   1 /*
   2  * Copyright (c) 2002 Kungliga Tekniska Högskolan
   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>
  36 RCSID("$Id$");
  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
  48 struct dns_reply*
  49 parse_reply(const unsigned char *, size_t);
  50
  51 enum { MAX_BUF = 36};
  52
  53 static 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
  69 static sig_atomic_t val = 0;
  70
  71 static RETSIGTYPE
  72 segv_handler(int sig)
  73 {
  74     val = 1;
  75 }
  76
  77 int
  78 main(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 }