tests/lib/libc/net/h_hostent.c

   1 /*      $NetBSD: h_hostent.c,v 1.2 2014/01/09 02:18:10 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 1.2 2014/01/09 02:18:10 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 extern const char *__res_conf_name;
  51
  52 static void
  53 phostent(const struct hostent *h)
  54 {
  55         size_t i;
  56         char buf[1024];
  57         const int af = h->h_length == NS_INADDRSZ ? AF_INET : AF_INET6;
  58
  59         printf("name=%s, length=%d, addrtype=%d, aliases=[",
  60             h->h_name, h->h_length, h->h_addrtype);
  61
  62         for (i = 0; h->h_aliases[i]; i++)
  63                 printf("%s%s", i == 0 ? "" : " ", h->h_aliases[i]);
  64
  65         printf("] addr_list=[");
  66
  67         for (i = 0; h->h_addr_list[i]; i++)
  68                 printf("%s%s", i == 0 ? "" : " ", inet_ntop(af,
  69                     h->h_addr_list[i], buf, (socklen_t)sizeof(buf)));
  70
  71         printf("]\n");
  72 }
  73
  74 static void
  75 usage(void)
  76 {
  77         (void)fprintf(stderr, "Usage: %s [-f <hostsfile>] "
  78             "[-t <any|dns|nis|files>] "
  79             "[-46a] <name|address>\n", getprogname());
  80         exit(EXIT_FAILURE);
  81 }
  82
  83 static void
  84 getby(int (*f)(void *, void *, va_list), struct getnamaddr *info, ...)
  85 {
  86         va_list ap;
  87         int e;
  88
  89         va_start(ap, info);
  90         e = (*f)(info, NULL, ap);
  91         va_end(ap);
  92         switch (e) {
  93         case NS_SUCCESS:
  94                 phostent(info->hp);
  95                 break;
  96         default:
  97                 printf("error %d\n", e);
  98                 break;
  99         }
 100 }
 101
 102 static void
 103 geta(struct hostent *hp) {
 104         if (hp == NULL)
 105                 printf("error %d\n", h_errno);
 106         else
 107                 phostent(hp);
 108 }
 109
 110 int
 111 main(int argc, char *argv[])
 112 {
 113         int (*f)(void *, void *, va_list) = NULL;
 114         const char *type = "any";
 115         int c, af, e, byaddr, len;
 116         struct hostent hent;
 117         struct getnamaddr info;
 118         char buf[4096];
 119
 120         af = AF_INET;
 121         byaddr = 0;
 122         len = 0;
 123         info.hp = &hent;
 124         info.buf = buf;
 125         info.buflen = sizeof(buf);
 126         info.he = &e;
 127
 128         while ((c = getopt(argc, argv, "46af:r:t:")) != -1) {
 129                 switch (c) {
 130                 case '4':
 131                         af = AF_INET;
 132                         break;
 133                 case '6':
 134                         af = AF_INET6;
 135                         break;
 136                 case 'a':
 137                         byaddr++;
 138                         break;
 139                 case 'f':
 140                         _hf_sethostsfile(optarg);
 141                         break;
 142                 case 'r':
 143                         __res_conf_name = optarg;
 144                         break;
 145                 case 't':
 146                         type = optarg;
 147                         break;
 148                 default:
 149                         usage();
 150                 }
 151         }
 152
 153         argc -= optind;
 154         argv += optind;
 155
 156         if (argc != 1)
 157                 usage();
 158
 159         switch (*type) {
 160         case 'a':
 161                 break;
 162         case 'd':
 163                 f = byaddr ? _dns_gethtbyaddr : _dns_gethtbyname;
 164                 break;
 165 #ifdef YP
 166         case 'n':
 167                 f = byaddr ? _yp_gethtbyaddr : _yp_gethtbyname;
 168                 break;
 169 #endif
 170         case 'f':
 171                 f = byaddr ? _hf_gethtbyaddr : _hf_gethtbyname;
 172                 break;
 173         default:
 174                 errx(EXIT_FAILURE, "Unknown db type `%s'", type);
 175         }
 176
 177         if (byaddr) {
 178                 struct in6_addr addr;
 179                 af = strchr(*argv, ':') ? AF_INET6 : AF_INET;
 180                 len = af == AF_INET ? NS_INADDRSZ : NS_IN6ADDRSZ;
 181                 if (inet_pton(af, *argv, &addr) == -1)
 182                         err(EXIT_FAILURE, "Can't parse `%s'", *argv);
 183                 if (*type == 'a')
 184                         geta(gethostbyaddr((const char *)&addr, len, af));
 185                 else
 186                         getby(f, &info, &addr, len, af);
 187         } else {
 188                 if (*type == 'a')
 189                         geta(gethostbyname2(*argv, af));
 190                 else
 191                         getby(f, &info, *argv, len, af);
 192         }
 193
 194         return 0;
 195 }