tests/lib/libc/net/h_hostent.c

   1 /*      $NetBSD: h_hostent.c,v 1.1 2013/08/16 15:29:45 christos Exp $   */
   2
   3 /*-
   4  * Copyright (c) 2013 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Christos Zoulas.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  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  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31 #include <sys/cdefs.h>
  32 __RCSID("$NetBSD: h_hostent.c,v 1.1 2013/08/16 15:29:45 christos Exp $");
  33
  34 #include <stdio.h>
  35 #include <string.h>
  36 #include <nsswitch.h>
  37 #include <netdb.h>
  38 #include <stdint.h>
  39 #include <stdlib.h>
  40 #include <unistd.h>
  41 #include <err.h>
  42
  43 #include <netinet/in.h>
  44 #include <sys/types.h>
  45 #include <arpa/nameser.h>
  46 #include <arpa/inet.h>
  47
  48 #include "hostent.h"
  49
  50 static void
  51 phostent(const struct hostent *h)
  52 {
  53         size_t i;
  54         char buf[1024];
  55         const int af = h->h_length == NS_INADDRSZ ? AF_INET : AF_INET6;
  56
  57         printf("name=%s, length=%d, addrtype=%d, aliases=[",
  58             h->h_name, h->h_length, h->h_addrtype);
  59
  60         for (i = 0; h->h_aliases[i]; i++)
  61                 printf("%s%s", i == 0 ? "" : " ", h->h_aliases[i]);
  62
  63         printf("] addr_list=[");
  64
  65         for (i = 0; h->h_addr_list[i]; i++)
  66                 printf("%s%s", i == 0 ? "" : " ", inet_ntop(af,
  67                     h->h_addr_list[i], buf, (socklen_t)sizeof(buf)));
  68
  69         printf("]\n");
  70 }
  71
  72 static void
  73 usage(void)
  74 {
  75         (void)fprintf(stderr, "Usage: %s [-f <hostsfile>] "
  76             "[-t <any|dns|nis|files>] "
  77             "[-46a] <name|address>\n", getprogname());
  78         exit(EXIT_FAILURE);
  79 }
  80
  81 static void
  82 getby(int (*f)(void *, void *, va_list), struct getnamaddr *info, ...)
  83 {
  84         va_list ap;
  85         int e;
  86
  87         va_start(ap, info);
  88         e = (*f)(info, NULL, ap);
  89         va_end(ap);
  90         switch (e) {
  91         case NS_SUCCESS:
  92                 phostent(info->hp);
  93                 break;
  94         default:
  95                 printf("error %d\n", e);
  96                 break;
  97         }
  98 }
  99
 100 static void
 101 geta(struct hostent *hp) {
 102         if (hp == NULL)
 103                 printf("error %d\n", h_errno);
 104         else
 105                 phostent(hp);
 106 }
 107
 108 int
 109 main(int argc, char *argv[])
 110 {
 111         int (*f)(void *, void *, va_list) = NULL;
 112         const char *type = "any";
 113         int c, af, e, byaddr, len;
 114         struct hostent hent;
 115         struct getnamaddr info;
 116         char buf[4096];
 117
 118         af = AF_INET;
 119         byaddr = 0;
 120         len = 0;
 121         info.hp = &hent;
 122         info.buf = buf;
 123         info.buflen = sizeof(buf);
 124         info.he = &e;
 125
 126         while ((c = getopt(argc, argv, "46af:t:")) != -1) {
 127                 switch (c) {
 128                 case '4':
 129                         af = AF_INET;
 130                         break;
 131                 case '6':
 132                         af = AF_INET6;
 133                         break;
 134                 case 'a':
 135                         byaddr++;
 136                         break;
 137                 case 't':
 138                         type = optarg;
 139                         break;
 140                 case 'f':
 141                         _hf_sethostsfile(optarg);
 142                         break;
 143                 default:
 144                         usage();
 145                 }
 146         }
 147
 148         argc -= optind;
 149         argv += optind;
 150
 151         if (argc != 1)
 152                 usage();
 153
 154         switch (*type) {
 155         case 'a':
 156                 break;
 157         case 'd':
 158                 f = byaddr ? _dns_gethtbyaddr : _dns_gethtbyname;
 159                 break;
 160 #ifdef YP
 161         case 'n':
 162                 f = byaddr ? _yp_gethtbyaddr : _yp_gethtbyname;
 163                 break;
 164 #endif
 165         case 'f':
 166                 f = byaddr ? _hf_gethtbyaddr : _hf_gethtbyname;
 167                 break;
 168         default:
 169                 errx(EXIT_FAILURE, "Unknown db type `%s'", type);
 170         }
 171
 172         if (byaddr) {
 173                 struct in6_addr addr;
 174                 af = strchr(*argv, ':') ? AF_INET6 : AF_INET;
 175                 len = af == AF_INET ? NS_INADDRSZ : NS_IN6ADDRSZ;
 176                 if (inet_pton(af, *argv, &addr) == -1)
 177                         err(EXIT_FAILURE, "Can't parse `%s'", *argv);
 178                 if (*type == 'a')
 179                         geta(gethostbyaddr((const char *)&addr, len, af));
 180                 else
 181                         getby(f, &info, &addr, len, af);
 182         } else {
 183                 if (*type == 'a')
 184                         geta(gethostbyname2(*argv, af));
 185                 else
 186                         getby(f, &info, *argv, len, af);
 187         }
 188
 189         return 0;
 190 }