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