h_hostent.c revision 1.2.8.2
1 1.2.8.2 tls /* $NetBSD: h_hostent.c,v 1.2.8.2 2014/08/20 00:04:50 tls Exp $ */ 2 1.2.8.2 tls 3 1.2.8.2 tls /*- 4 1.2.8.2 tls * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.2.8.2 tls * All rights reserved. 6 1.2.8.2 tls * 7 1.2.8.2 tls * This code is derived from software contributed to The NetBSD Foundation 8 1.2.8.2 tls * by Christos Zoulas. 9 1.2.8.2 tls * 10 1.2.8.2 tls * Redistribution and use in source and binary forms, with or without 11 1.2.8.2 tls * modification, are permitted provided that the following conditions 12 1.2.8.2 tls * are met: 13 1.2.8.2 tls * 1. Redistributions of source code must retain the above copyright 14 1.2.8.2 tls * notice, this list of conditions and the following disclaimer. 15 1.2.8.2 tls * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.8.2 tls * notice, this list of conditions and the following disclaimer in the 17 1.2.8.2 tls * documentation and/or other materials provided with the distribution. 18 1.2.8.2 tls * 19 1.2.8.2 tls * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2.8.2 tls * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2.8.2 tls * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2.8.2 tls * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2.8.2 tls * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2.8.2 tls * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2.8.2 tls * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2.8.2 tls * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2.8.2 tls * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2.8.2 tls * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2.8.2 tls * POSSIBILITY OF SUCH DAMAGE. 30 1.2.8.2 tls */ 31 1.2.8.2 tls #include <sys/cdefs.h> 32 1.2.8.2 tls __RCSID("$NetBSD: h_hostent.c,v 1.2.8.2 2014/08/20 00:04:50 tls Exp $"); 33 1.2.8.2 tls 34 1.2.8.2 tls #include <stdio.h> 35 1.2.8.2 tls #include <string.h> 36 1.2.8.2 tls #include <nsswitch.h> 37 1.2.8.2 tls #include <netdb.h> 38 1.2.8.2 tls #include <stdint.h> 39 1.2.8.2 tls #include <stdlib.h> 40 1.2.8.2 tls #include <unistd.h> 41 1.2.8.2 tls #include <err.h> 42 1.2.8.2 tls 43 1.2.8.2 tls #include <netinet/in.h> 44 1.2.8.2 tls #include <sys/types.h> 45 1.2.8.2 tls #include <arpa/nameser.h> 46 1.2.8.2 tls #include <arpa/inet.h> 47 1.2.8.2 tls 48 1.2.8.2 tls #include "hostent.h" 49 1.2.8.2 tls 50 1.2.8.2 tls extern const char *__res_conf_name; 51 1.2.8.2 tls 52 1.2.8.2 tls static void 53 1.2.8.2 tls phostent(const struct hostent *h) 54 1.2.8.2 tls { 55 1.2.8.2 tls size_t i; 56 1.2.8.2 tls char buf[1024]; 57 1.2.8.2 tls const int af = h->h_length == NS_INADDRSZ ? AF_INET : AF_INET6; 58 1.2.8.2 tls 59 1.2.8.2 tls printf("name=%s, length=%d, addrtype=%d, aliases=[", 60 1.2.8.2 tls h->h_name, h->h_length, h->h_addrtype); 61 1.2.8.2 tls 62 1.2.8.2 tls for (i = 0; h->h_aliases[i]; i++) 63 1.2.8.2 tls printf("%s%s", i == 0 ? "" : " ", h->h_aliases[i]); 64 1.2.8.2 tls 65 1.2.8.2 tls printf("] addr_list=["); 66 1.2.8.2 tls 67 1.2.8.2 tls for (i = 0; h->h_addr_list[i]; i++) 68 1.2.8.2 tls printf("%s%s", i == 0 ? "" : " ", inet_ntop(af, 69 1.2.8.2 tls h->h_addr_list[i], buf, (socklen_t)sizeof(buf))); 70 1.2.8.2 tls 71 1.2.8.2 tls printf("]\n"); 72 1.2.8.2 tls } 73 1.2.8.2 tls 74 1.2.8.2 tls static void 75 1.2.8.2 tls usage(void) 76 1.2.8.2 tls { 77 1.2.8.2 tls (void)fprintf(stderr, "Usage: %s [-f <hostsfile>] " 78 1.2.8.2 tls "[-t <any|dns|nis|files>] " 79 1.2.8.2 tls "[-46a] <name|address>\n", getprogname()); 80 1.2.8.2 tls exit(EXIT_FAILURE); 81 1.2.8.2 tls } 82 1.2.8.2 tls 83 1.2.8.2 tls static void 84 1.2.8.2 tls getby(int (*f)(void *, void *, va_list), struct getnamaddr *info, ...) 85 1.2.8.2 tls { 86 1.2.8.2 tls va_list ap; 87 1.2.8.2 tls int e; 88 1.2.8.2 tls 89 1.2.8.2 tls va_start(ap, info); 90 1.2.8.2 tls e = (*f)(info, NULL, ap); 91 1.2.8.2 tls va_end(ap); 92 1.2.8.2 tls switch (e) { 93 1.2.8.2 tls case NS_SUCCESS: 94 1.2.8.2 tls phostent(info->hp); 95 1.2.8.2 tls break; 96 1.2.8.2 tls default: 97 1.2.8.2 tls printf("error %d\n", e); 98 1.2.8.2 tls break; 99 1.2.8.2 tls } 100 1.2.8.2 tls } 101 1.2.8.2 tls 102 1.2.8.2 tls static void 103 1.2.8.2 tls geta(struct hostent *hp) { 104 1.2.8.2 tls if (hp == NULL) 105 1.2.8.2 tls printf("error %d\n", h_errno); 106 1.2.8.2 tls else 107 1.2.8.2 tls phostent(hp); 108 1.2.8.2 tls } 109 1.2.8.2 tls 110 1.2.8.2 tls int 111 1.2.8.2 tls main(int argc, char *argv[]) 112 1.2.8.2 tls { 113 1.2.8.2 tls int (*f)(void *, void *, va_list) = NULL; 114 1.2.8.2 tls const char *type = "any"; 115 1.2.8.2 tls int c, af, e, byaddr, len; 116 1.2.8.2 tls struct hostent hent; 117 1.2.8.2 tls struct getnamaddr info; 118 1.2.8.2 tls char buf[4096]; 119 1.2.8.2 tls 120 1.2.8.2 tls af = AF_INET; 121 1.2.8.2 tls byaddr = 0; 122 1.2.8.2 tls len = 0; 123 1.2.8.2 tls info.hp = &hent; 124 1.2.8.2 tls info.buf = buf; 125 1.2.8.2 tls info.buflen = sizeof(buf); 126 1.2.8.2 tls info.he = &e; 127 1.2.8.2 tls 128 1.2.8.2 tls while ((c = getopt(argc, argv, "46af:r:t:")) != -1) { 129 1.2.8.2 tls switch (c) { 130 1.2.8.2 tls case '4': 131 1.2.8.2 tls af = AF_INET; 132 1.2.8.2 tls break; 133 1.2.8.2 tls case '6': 134 1.2.8.2 tls af = AF_INET6; 135 1.2.8.2 tls break; 136 1.2.8.2 tls case 'a': 137 1.2.8.2 tls byaddr++; 138 1.2.8.2 tls break; 139 1.2.8.2 tls case 'f': 140 1.2.8.2 tls _hf_sethostsfile(optarg); 141 1.2.8.2 tls break; 142 1.2.8.2 tls case 'r': 143 1.2.8.2 tls __res_conf_name = optarg; 144 1.2.8.2 tls break; 145 1.2.8.2 tls case 't': 146 1.2.8.2 tls type = optarg; 147 1.2.8.2 tls break; 148 1.2.8.2 tls default: 149 1.2.8.2 tls usage(); 150 1.2.8.2 tls } 151 1.2.8.2 tls } 152 1.2.8.2 tls 153 1.2.8.2 tls argc -= optind; 154 1.2.8.2 tls argv += optind; 155 1.2.8.2 tls 156 1.2.8.2 tls if (argc != 1) 157 1.2.8.2 tls usage(); 158 1.2.8.2 tls 159 1.2.8.2 tls switch (*type) { 160 1.2.8.2 tls case 'a': 161 1.2.8.2 tls break; 162 1.2.8.2 tls case 'd': 163 1.2.8.2 tls f = byaddr ? _dns_gethtbyaddr : _dns_gethtbyname; 164 1.2.8.2 tls break; 165 1.2.8.2 tls #ifdef YP 166 1.2.8.2 tls case 'n': 167 1.2.8.2 tls f = byaddr ? _yp_gethtbyaddr : _yp_gethtbyname; 168 1.2.8.2 tls break; 169 1.2.8.2 tls #endif 170 1.2.8.2 tls case 'f': 171 1.2.8.2 tls f = byaddr ? _hf_gethtbyaddr : _hf_gethtbyname; 172 1.2.8.2 tls break; 173 1.2.8.2 tls default: 174 1.2.8.2 tls errx(EXIT_FAILURE, "Unknown db type `%s'", type); 175 1.2.8.2 tls } 176 1.2.8.2 tls 177 1.2.8.2 tls if (byaddr) { 178 1.2.8.2 tls struct in6_addr addr; 179 1.2.8.2 tls af = strchr(*argv, ':') ? AF_INET6 : AF_INET; 180 1.2.8.2 tls len = af == AF_INET ? NS_INADDRSZ : NS_IN6ADDRSZ; 181 1.2.8.2 tls if (inet_pton(af, *argv, &addr) == -1) 182 1.2.8.2 tls err(EXIT_FAILURE, "Can't parse `%s'", *argv); 183 1.2.8.2 tls if (*type == 'a') 184 1.2.8.2 tls geta(gethostbyaddr((const char *)&addr, len, af)); 185 1.2.8.2 tls else 186 1.2.8.2 tls getby(f, &info, &addr, len, af); 187 1.2.8.2 tls } else { 188 1.2.8.2 tls if (*type == 'a') 189 1.2.8.2 tls geta(gethostbyname2(*argv, af)); 190 1.2.8.2 tls else 191 1.2.8.2 tls getby(f, &info, *argv, len, af); 192 1.2.8.2 tls } 193 1.2.8.2 tls 194 1.2.8.2 tls return 0; 195 1.2.8.2 tls } 196
Indexes created Thu Oct 02 14:10:14 GMT 2025