1 /*** 2 This file is part of avahi. 3 4 avahi is free software; you can redistribute it and/or modify it 5 under the terms of the GNU Lesser General Public License as 6 published by the Free Software Foundation; either version 2.1 of the 7 License, or (at your option) any later version. 8 9 avahi is distributed in the hope that it will be useful, but WITHOUT 10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 11 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General 12 Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with avahi; if not, write to the Free Software 16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 17 USA. 18 ***/ 19 20 #ifdef HAVE_CONFIG_H 21 #include <config.h> 22 #endif 23 24 #include <stdlib.h> 25 #include <stdio.h> 26 #include <getopt.h> 27 #include <assert.h> 28 #include <string.h> 29 #include <sys/types.h> 30 #include <sys/socket.h> 31 #include <net/if.h> 32 #include <locale.h> 33 34 #include <avahi-common/simple-watch.h> 35 #include <avahi-common/error.h> 36 #include "avahi-common/avahi-malloc.h" 37 #include <avahi-common/domain.h> 38 #include <avahi-common/llist.h> 39 #include <avahi-common/i18n.h> 40 #include <avahi-client/client.h> 41 #include <avahi-client/lookup.h> 42 43 #include "sigint.h" 44 45 typedef enum { 46 COMMAND_UNSPEC, 47 COMMAND_HELP, 48 COMMAND_VERSION, 49 COMMAND_RESOLVE_HOST_NAME, 50 COMMAND_RESOLVE_ADDRESS 51 } Command; 52 53 typedef struct Config { 54 int verbose; 55 Command command; 56 AvahiProtocol proto; 57 } Config; 58 59 static AvahiSimplePoll *simple_poll = NULL; 60 static AvahiClient *client = NULL; 61 62 static int n_resolving = 0; 63 64 static void host_name_resolver_callback( 65 AvahiHostNameResolver *r, 66 AVAHI_GCC_UNUSED AvahiIfIndex interface, 67 AVAHI_GCC_UNUSED AvahiProtocol protocol, 68 AvahiResolverEvent event, 69 const char *name, 70 const AvahiAddress *a, 71 AVAHI_GCC_UNUSED AvahiLookupResultFlags flags, 72 AVAHI_GCC_UNUSED void *userdata) { 73 74 assert(r); 75 76 switch (event) { 77 case AVAHI_RESOLVER_FOUND: { 78 char address[AVAHI_ADDRESS_STR_MAX]; 79 80 avahi_address_snprint(address, sizeof(address), a); 81 82 printf("%s\t%s\n", name, address); 83 84 break; 85 } 86 87 case AVAHI_RESOLVER_FAILURE: 88 89 fprintf(stderr, _("Failed to resolve host name '%s': %s\n"), name, avahi_strerror(avahi_client_errno(client))); 90 break; 91 } 92 93 94 avahi_host_name_resolver_free(r); 95 96 assert(n_resolving > 0); 97 n_resolving--; 98 99 if (n_resolving <= 0) 100 avahi_simple_poll_quit(simple_poll); 101 } 102 103 static void address_resolver_callback( 104 AvahiAddressResolver *r, 105 AVAHI_GCC_UNUSED AvahiIfIndex interface, 106 AVAHI_GCC_UNUSED AvahiProtocol protocol, 107 AvahiResolverEvent event, 108 const AvahiAddress *a, 109 const char *name, 110 AVAHI_GCC_UNUSED AvahiLookupResultFlags flags, 111 AVAHI_GCC_UNUSED void *userdata) { 112 113 char address[AVAHI_ADDRESS_STR_MAX]; 114 assert(r); 115 116 avahi_address_snprint(address, sizeof(address), a); 117 118 switch (event) { 119 case AVAHI_RESOLVER_FOUND: 120 121 printf("%s\t%s\n", address, name); 122 break; 123 124 case AVAHI_RESOLVER_FAILURE: 125 126 fprintf(stderr, _("Failed to resolve address '%s': %s\n"), address, avahi_strerror(avahi_client_errno(client))); 127 break; 128 } 129 130 131 avahi_address_resolver_free(r); 132 133 assert(n_resolving > 0); 134 n_resolving--; 135 136 if (n_resolving <= 0) 137 avahi_simple_poll_quit(simple_poll); 138 } 139 140 static void client_callback(AvahiClient *c, AvahiClientState state, AVAHI_GCC_UNUSED void * userdata) { 141 switch (state) { 142 case AVAHI_CLIENT_FAILURE: 143 fprintf(stderr, _("Client failure, exiting: %s\n"), avahi_strerror(avahi_client_errno(c))); 144 avahi_simple_poll_quit(simple_poll); 145 break; 146 147 case AVAHI_CLIENT_S_REGISTERING: 148 case AVAHI_CLIENT_S_RUNNING: 149 case AVAHI_CLIENT_S_COLLISION: 150 case AVAHI_CLIENT_CONNECTING: 151 ; 152 } 153 } 154 155 static void help(FILE *f, const char *argv0) { 156 fprintf(f, 157 _("%s [options] %s <host name ...>\n" 158 "%s [options] %s <address ... >\n\n" 159 " -h --help Show this help\n" 160 " -V --version Show version\n" 161 " -n --name Resolve host name\n" 162 " -a --address Resolve address\n" 163 " -v --verbose Enable verbose mode\n" 164 " -6 Lookup IPv6 address\n" 165 " -4 Lookup IPv4 address\n"), 166 argv0, strstr(argv0, "host-name") ? "[-n]" : "-n", 167 argv0, strstr(argv0, "address") ? "[-a]" : "-a"); 168 } 169 170 static int parse_command_line(Config *c, const char *argv0, int argc, char *argv[]) { 171 int o; 172 173 static const struct option long_options[] = { 174 { "help", no_argument, NULL, 'h' }, 175 { "version", no_argument, NULL, 'V' }, 176 { "name", no_argument, NULL, 'n' }, 177 { "address", no_argument, NULL, 'a' }, 178 { "verbose", no_argument, NULL, 'v' }, 179 { NULL, 0, NULL, 0 } 180 }; 181 182 assert(c); 183 184 c->command = strstr(argv0, "address") ? COMMAND_RESOLVE_ADDRESS : (strstr(argv0, "host-name") ? COMMAND_RESOLVE_HOST_NAME : COMMAND_UNSPEC); 185 c->proto = AVAHI_PROTO_UNSPEC; 186 c->verbose = 0; 187 188 while ((o = getopt_long(argc, argv, "hVnav46", long_options, NULL)) >= 0) { 189 190 switch(o) { 191 case 'h': 192 c->command = COMMAND_HELP; 193 break; 194 case 'V': 195 c->command = COMMAND_VERSION; 196 break; 197 case 'n': 198 c->command = COMMAND_RESOLVE_HOST_NAME; 199 break; 200 case 'a': 201 c->command = COMMAND_RESOLVE_ADDRESS; 202 break; 203 case 'v': 204 c->verbose = 1; 205 break; 206 case '4': 207 c->proto = AVAHI_PROTO_INET; 208 break; 209 case '6': 210 c->proto = AVAHI_PROTO_INET6; 211 break; 212 default: 213 return -1; 214 } 215 } 216 217 if (c->command == COMMAND_RESOLVE_ADDRESS || c->command == COMMAND_RESOLVE_HOST_NAME) { 218 if (optind >= argc) { 219 fprintf(stderr, _("Too few arguments\n")); 220 return -1; 221 } 222 } 223 224 return 0; 225 } 226 227 int main(int argc, char *argv[]) { 228 int ret = 1, error; 229 Config config; 230 const char *argv0; 231 232 avahi_init_i18n(); 233 setlocale(LC_ALL, ""); 234 235 if ((argv0 = strrchr(argv[0], '/'))) 236 argv0++; 237 else 238 argv0 = argv[0]; 239 240 if (parse_command_line(&config, argv0, argc, argv) < 0) 241 goto fail; 242 243 switch (config.command) { 244 case COMMAND_UNSPEC: 245 ret = 1; 246 fprintf(stderr, _("No command specified.\n")); 247 break; 248 249 case COMMAND_HELP: 250 help(stdout, argv0); 251 ret = 0; 252 break; 253 254 case COMMAND_VERSION: 255 printf("%s "PACKAGE_VERSION"\n", argv0); 256 ret = 0; 257 break; 258 259 case COMMAND_RESOLVE_HOST_NAME: 260 case COMMAND_RESOLVE_ADDRESS: { 261 int i; 262 263 if (!(simple_poll = avahi_simple_poll_new())) { 264 fprintf(stderr, _("Failed to create simple poll object.\n")); 265 goto fail; 266 } 267 268 if (sigint_install(simple_poll) < 0) 269 goto fail; 270 271 if (!(client = avahi_client_new(avahi_simple_poll_get(simple_poll), 0, client_callback, NULL, &error))) { 272 fprintf(stderr, _("Failed to create client object: %s\n"), avahi_strerror(error)); 273 goto fail; 274 } 275 276 if (config.verbose) { 277 const char *version, *hn; 278 279 if (!(version = avahi_client_get_version_string(client))) { 280 fprintf(stderr, _("Failed to query version string: %s\n"), avahi_strerror(avahi_client_errno(client))); 281 goto fail; 282 } 283 284 if (!(hn = avahi_client_get_host_name_fqdn(client))) { 285 fprintf(stderr, _("Failed to query host name: %s\n"), avahi_strerror(avahi_client_errno(client))); 286 goto fail; 287 } 288 289 fprintf(stderr, _("Server version: %s; Host name: %s\n"), version, hn); 290 } 291 292 n_resolving = 0; 293 294 for (i = optind; i < argc; i++) { 295 296 if (config.command == COMMAND_RESOLVE_HOST_NAME) { 297 298 if (!(avahi_host_name_resolver_new(client, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, argv[i], config.proto, 0, host_name_resolver_callback, NULL))) { 299 fprintf(stderr, _("Failed to create host name resolver: %s\n"), avahi_strerror(avahi_client_errno(client))); 300 goto fail; 301 } 302 303 } else { 304 AvahiAddress a; 305 306 assert(config.command == COMMAND_RESOLVE_ADDRESS); 307 308 if (!avahi_address_parse(argv[i], AVAHI_PROTO_UNSPEC, &a)) { 309 fprintf(stderr, _("Failed to parse address '%s'\n"), argv[i]); 310 goto fail; 311 } 312 313 if (!(avahi_address_resolver_new(client, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, &a, 0, address_resolver_callback, NULL))) { 314 fprintf(stderr, _("Failed to create address resolver: %s\n"), avahi_strerror(avahi_client_errno(client))); 315 goto fail; 316 } 317 } 318 319 n_resolving++; 320 } 321 322 avahi_simple_poll_loop(simple_poll); 323 ret = 0; 324 break; 325 } 326 } 327 328 fail: 329 330 if (client) 331 avahi_client_free(client); 332 333 sigint_uninstall(); 334 335 if (simple_poll) 336 avahi_simple_poll_free(simple_poll); 337 338 return ret; 339 } 340
