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 <errno.h>
31 #include <locale.h>
32
33 #include <avahi-common/simple-watch.h>
34 #include <avahi-common/error.h>
35 #include "avahi-common/avahi-malloc.h"
36 #include <avahi-common/alternative.h>
37 #include <avahi-common/i18n.h>
38 #include <avahi-client/client.h>
39 #include <avahi-client/publish.h>
40
41 #include "sigint.h"
42
43 typedef enum {
44 COMMAND_UNSPEC,
45 COMMAND_HELP,
46 COMMAND_VERSION,
47 COMMAND_PUBLISH_SERVICE,
48 COMMAND_PUBLISH_ADDRESS
49 } Command;
50
51 typedef struct Config {
52 int verbose, no_fail, no_reverse;
53 Command command;
54 char *name, *stype, *domain, *host;
55 uint16_t port;
56 AvahiStringList *txt, *subtypes;
57 AvahiAddress address;
58 } Config;
59
60 static AvahiSimplePoll *simple_poll = NULL;
61 static AvahiClient *client = NULL;
62 static AvahiEntryGroup *entry_group = NULL;
63
64 static int register_stuff(Config *config);
65
entry_group_callback(AvahiEntryGroup * g,AvahiEntryGroupState state,void * userdata)66 static void entry_group_callback(AvahiEntryGroup *g, AvahiEntryGroupState state, void *userdata) {
67 Config *config = userdata;
68
69 assert(g);
70 assert(config);
71
72 switch (state) {
73
74 case AVAHI_ENTRY_GROUP_ESTABLISHED:
75
76 fprintf(stderr, _("Established under name '%s'\n"), config->name);
77 break;
78
79 case AVAHI_ENTRY_GROUP_FAILURE:
80
81 fprintf(stderr, _("Failed to register: %s\n"), avahi_strerror(avahi_client_errno(client)));
82 break;
83
84 case AVAHI_ENTRY_GROUP_COLLISION: {
85 char *n;
86
87 if (config->command == COMMAND_PUBLISH_SERVICE)
88 n = avahi_alternative_service_name(config->name);
89 else {
90 assert(config->command == COMMAND_PUBLISH_ADDRESS);
91 n = avahi_alternative_host_name(config->name);
92 }
93
94 fprintf(stderr, _("Name collision, picking new name '%s'.\n"), n);
95 avahi_free(config->name);
96 config->name = n;
97
98 register_stuff(config);
99
100 break;
101 }
102
103 case AVAHI_ENTRY_GROUP_UNCOMMITED:
104 case AVAHI_ENTRY_GROUP_REGISTERING:
105 ;
106 }
107 }
108
register_stuff(Config * config)109 static int register_stuff(Config *config) {
110 assert(config);
111
112 if (!entry_group) {
113 if (!(entry_group = avahi_entry_group_new(client, entry_group_callback, config))) {
114 fprintf(stderr, _("Failed to create entry group: %s\n"), avahi_strerror(avahi_client_errno(client)));
115 return -1;
116 }
117 }
118
119 assert(avahi_entry_group_is_empty(entry_group));
120
121 if (config->command == COMMAND_PUBLISH_ADDRESS) {
122
123 if (avahi_entry_group_add_address(entry_group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, config->no_reverse ? AVAHI_PUBLISH_NO_REVERSE : 0, config->name, &config->address) < 0) {
124 fprintf(stderr, _("Failed to add address: %s\n"), avahi_strerror(avahi_client_errno(client)));
125 return -1;
126 }
127
128 } else {
129 AvahiStringList *i;
130
131 assert(config->command == COMMAND_PUBLISH_SERVICE);
132
133 if (avahi_entry_group_add_service_strlst(entry_group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, config->name, config->stype, config->domain, config->host, config->port, config->txt) < 0) {
134 fprintf(stderr, _("Failed to add service: %s\n"), avahi_strerror(avahi_client_errno(client)));
135 return -1;
136 }
137
138 for (i = config->subtypes; i; i = i->next)
139 if (avahi_entry_group_add_service_subtype(entry_group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, config->name, config->stype, config->domain, (char*) i->text) < 0) {
140 fprintf(stderr, _("Failed to add subtype '%s': %s\n"), i->text, avahi_strerror(avahi_client_errno(client)));
141 return -1;
142 }
143 }
144
145 avahi_entry_group_commit(entry_group);
146
147 return 0;
148 }
149
client_callback(AvahiClient * c,AvahiClientState state,AVAHI_GCC_UNUSED void * userdata)150 static void client_callback(AvahiClient *c, AvahiClientState state, AVAHI_GCC_UNUSED void * userdata) {
151 Config *config = userdata;
152
153 client = c;
154
155 switch (state) {
156 case AVAHI_CLIENT_FAILURE:
157
158 if (config->no_fail && avahi_client_errno(c) == AVAHI_ERR_DISCONNECTED) {
159 int error;
160
161 /* We have been disconnected, so let reconnect */
162
163 fprintf(stderr, _("Disconnected, reconnecting ...\n"));
164
165 avahi_client_free(client);
166 client = NULL;
167 entry_group = NULL;
168
169 if (!(client = avahi_client_new(avahi_simple_poll_get(simple_poll), AVAHI_CLIENT_NO_FAIL, client_callback, config, &error))) {
170 fprintf(stderr, _("Failed to create client object: %s\n"), avahi_strerror(error));
171 avahi_simple_poll_quit(simple_poll);
172 }
173
174 } else {
175 fprintf(stderr, _("Client failure, exiting: %s\n"), avahi_strerror(avahi_client_errno(c)));
176 avahi_simple_poll_quit(simple_poll);
177 }
178
179 break;
180
181 case AVAHI_CLIENT_S_RUNNING:
182
183 if (register_stuff(config) < 0)
184 avahi_simple_poll_quit(simple_poll);
185
186 break;
187
188 case AVAHI_CLIENT_S_COLLISION:
189
190 if (config->verbose)
191 fprintf(stderr, _("Host name conflict\n"));
192
193 /* Fall through */
194
195 case AVAHI_CLIENT_S_REGISTERING:
196
197 if (entry_group) {
198 avahi_entry_group_free(entry_group);
199 entry_group = NULL;
200 }
201 break;
202
203 case AVAHI_CLIENT_CONNECTING:
204
205 if (config->verbose)
206 fprintf(stderr, _("Waiting for daemon ...\n"));
207
208 break;
209
210 ;
211 }
212 }
213
help(FILE * f,const char * argv0)214 static void help(FILE *f, const char *argv0) {
215 fprintf(f,
216 _("%s [options] %s <name> <type> <port> [<txt ...>]\n"
217 "%s [options] %s <host-name> <address>\n\n"
218 " -h --help Show this help\n"
219 " -V --version Show version\n"
220 " -s --service Publish service\n"
221 " -a --address Publish address\n"
222 " -v --verbose Enable verbose mode\n"
223 " -d --domain=DOMAIN Domain to publish service in\n"
224 " -H --host=DOMAIN Host where service resides\n"
225 " --subtype=SUBTYPE An additional subtype to register this service with\n"
226 " -R --no-reverse Do not publish reverse entry with address\n"
227 " -f --no-fail Don't fail if the daemon is not available\n"),
228 argv0, strstr(argv0, "service") ? "[-s]" : "-s",
229 argv0, strstr(argv0, "address") ? "[-a]" : "-a");
230 }
231
parse_command_line(Config * c,const char * argv0,int argc,char * argv[])232 static int parse_command_line(Config *c, const char *argv0, int argc, char *argv[]) {
233 int o;
234
235 enum {
236 ARG_SUBTYPE = 256
237 };
238
239 static const struct option long_options[] = {
240 { "help", no_argument, NULL, 'h' },
241 { "version", no_argument, NULL, 'V' },
242 { "service", no_argument, NULL, 's' },
243 { "address", no_argument, NULL, 'a' },
244 { "verbose", no_argument, NULL, 'v' },
245 { "domain", required_argument, NULL, 'd' },
246 { "host", required_argument, NULL, 'H' },
247 { "subtype", required_argument, NULL, ARG_SUBTYPE},
248 { "no-reverse", no_argument, NULL, 'R' },
249 { "no-fail", no_argument, NULL, 'f' },
250 { NULL, 0, NULL, 0 }
251 };
252
253 assert(c);
254
255 c->command = strstr(argv0, "address") ? COMMAND_PUBLISH_ADDRESS : (strstr(argv0, "service") ? COMMAND_PUBLISH_SERVICE : COMMAND_UNSPEC);
256 c->verbose = c->no_fail = c->no_reverse = 0;
257 c->host = c->name = c->domain = c->stype = NULL;
258 c->port = 0;
259 c->txt = c->subtypes = NULL;
260
261 while ((o = getopt_long(argc, argv, "hVsavRd:H:f", long_options, NULL)) >= 0) {
262
263 switch(o) {
264 case 'h':
265 c->command = COMMAND_HELP;
266 break;
267 case 'V':
268 c->command = COMMAND_VERSION;
269 break;
270 case 's':
271 c->command = COMMAND_PUBLISH_SERVICE;
272 break;
273 case 'a':
274 c->command = COMMAND_PUBLISH_ADDRESS;
275 break;
276 case 'v':
277 c->verbose = 1;
278 break;
279 case 'R':
280 c->no_reverse = 1;
281 break;
282 case 'd':
283 avahi_free(c->domain);
284 c->domain = avahi_strdup(optarg);
285 break;
286 case 'H':
287 avahi_free(c->host);
288 c->host = avahi_strdup(optarg);
289 break;
290 case 'f':
291 c->no_fail = 1;
292 break;
293 case ARG_SUBTYPE:
294 c->subtypes = avahi_string_list_add(c->subtypes, optarg);
295 break;
296 default:
297 return -1;
298 }
299 }
300
301 if (c->command == COMMAND_PUBLISH_ADDRESS) {
302 if (optind+2 != argc) {
303 fprintf(stderr, _("Bad number of arguments\n"));
304 return -1;
305 }
306
307 avahi_free(c->name);
308 c->name = avahi_strdup(argv[optind]);
309 avahi_address_parse(argv[optind+1], AVAHI_PROTO_UNSPEC, &c->address);
310
311 } else if (c->command == COMMAND_PUBLISH_SERVICE) {
312
313 char *e;
314 long int p;
315 int i;
316
317 if (optind+3 > argc) {
318 fprintf(stderr, _("Bad number of arguments\n"));
319 return -1;
320 }
321
322 c->name = avahi_strdup(argv[optind]);
323 c->stype = avahi_strdup(argv[optind+1]);
324
325 errno = 0;
326 p = strtol(argv[optind+2], &e, 0);
327
328 if (errno != 0 || *e || p < 0 || p > 0xFFFF) {
329 fprintf(stderr, _("Failed to parse port number: %s\n"), argv[optind+2]);
330 return -1;
331 }
332
333 c->port = p;
334
335 for (i = optind+3; i < argc; i++)
336 c->txt = avahi_string_list_add(c->txt, argv[i]);
337 }
338
339 return 0;
340 }
341
main(int argc,char * argv[])342 int main(int argc, char *argv[]) {
343 int ret = 1, error;
344 Config config;
345 const char *argv0;
346
347 avahi_init_i18n();
348 setlocale(LC_ALL, "");
349
350 if ((argv0 = strrchr(argv[0], '/')))
351 argv0++;
352 else
353 argv0 = argv[0];
354
355 if (parse_command_line(&config, argv0, argc, argv) < 0)
356 goto fail;
357
358 switch (config.command) {
359 case COMMAND_UNSPEC:
360 ret = 1;
361 fprintf(stderr, _("No command specified.\n"));
362 break;
363
364 case COMMAND_HELP:
365 help(stdout, argv0);
366 ret = 0;
367 break;
368
369 case COMMAND_VERSION:
370 printf("%s "PACKAGE_VERSION"\n", argv0);
371 ret = 0;
372 break;
373
374 case COMMAND_PUBLISH_SERVICE:
375 case COMMAND_PUBLISH_ADDRESS:
376
377 if (!(simple_poll = avahi_simple_poll_new())) {
378 fprintf(stderr, _("Failed to create simple poll object.\n"));
379 goto fail;
380 }
381
382 if (sigint_install(simple_poll) < 0)
383 goto fail;
384
385 if (!(client = avahi_client_new(avahi_simple_poll_get(simple_poll), config.no_fail ? AVAHI_CLIENT_NO_FAIL : 0, client_callback, &config, &error))) {
386 fprintf(stderr, _("Failed to create client object: %s\n"), avahi_strerror(error));
387 goto fail;
388 }
389
390 if (avahi_client_get_state(client) != AVAHI_CLIENT_CONNECTING && config.verbose) {
391 const char *version, *hn;
392
393 if (!(version = avahi_client_get_version_string(client))) {
394 fprintf(stderr, _("Failed to query version string: %s\n"), avahi_strerror(avahi_client_errno(client)));
395 goto fail;
396 }
397
398 if (!(hn = avahi_client_get_host_name_fqdn(client))) {
399 fprintf(stderr, _("Failed to query host name: %s\n"), avahi_strerror(avahi_client_errno(client)));
400 goto fail;
401 }
402
403 fprintf(stderr, _("Server version: %s; Host name: %s\n"), version, hn);
404 }
405
406 avahi_simple_poll_loop(simple_poll);
407 ret = 0;
408 break;
409 }
410
411 fail:
412
413 if (client)
414 avahi_client_free(client);
415
416 sigint_uninstall();
417
418 if (simple_poll)
419 avahi_simple_poll_free(simple_poll);
420
421 avahi_free(config.host);
422 avahi_free(config.name);
423 avahi_free(config.stype);
424 avahi_free(config.domain);
425 avahi_string_list_free(config.subtypes);
426 avahi_string_list_free(config.txt);
427
428 return ret;
429 }
430