4 This file is part of avahi.
6 avahi is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as
8 published by the Free Software Foundation; either version 2.1 of the
9 License, or (at your option) any later version.
11 avahi is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
14 Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with avahi; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
30 #include <dbus/dbus.h>
32 #include <avahi-common/dbus.h>
33 #include <avahi-common/llist.h>
34 #include <avahi-common/error.h>
35 #include <avahi-common/dbus.h>
36 #include <avahi-common/malloc.h>
37 #include <avahi-common/dbus-watch-glue.h>
42 #define AVAHI_CLIENT_DBUS_API_SUPPORTED ((uint32_t) 0x0201)
44 static int init_server(AvahiClient *client, int *ret_error);
46 int avahi_client_set_errno (AvahiClient *client, int error) {
49 return client->error = error;
52 int avahi_client_set_dbus_error(AvahiClient *client, DBusError *error) {
56 return avahi_client_set_errno(client, avahi_error_dbus_to_number(error->name));
59 static void client_set_state (AvahiClient *client, AvahiServerState state) {
62 if (client->state == state)
65 client->state = state;
67 switch (client->state) {
68 case AVAHI_CLIENT_FAILURE:
70 dbus_connection_disconnect(client->bus);
71 dbus_connection_unref(client->bus);
77 case AVAHI_CLIENT_S_COLLISION:
78 case AVAHI_CLIENT_S_REGISTERING:
80 /* Clear cached strings */
81 avahi_free(client->host_name);
82 avahi_free(client->host_name_fqdn);
83 avahi_free(client->domain_name);
85 client->host_name = NULL;
86 client->host_name_fqdn = NULL;
87 client->domain_name = NULL;
90 case AVAHI_CLIENT_S_RUNNING:
91 case AVAHI_CLIENT_CONNECTING:
97 client->callback (client, state, client->userdata);
100 static DBusHandlerResult filter_func(DBusConnection *bus, DBusMessage *message, void *userdata) {
101 AvahiClient *client = userdata;
107 dbus_error_init(&error);
109 /* fprintf(stderr, "dbus: interface=%s, path=%s, member=%s\n", */
110 /* dbus_message_get_interface (message), */
111 /* dbus_message_get_path (message), */
112 /* dbus_message_get_member (message)); */
114 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
116 /* The DBUS server died or kicked us */
117 avahi_client_set_errno(client, AVAHI_ERR_DISCONNECTED);
120 } else if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameAcquired")) {
122 /* Ignore this message */
124 } else if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameOwnerChanged")) {
125 char *name, *old, *new;
127 if (!dbus_message_get_args(
129 DBUS_TYPE_STRING, &name,
130 DBUS_TYPE_STRING, &old,
131 DBUS_TYPE_STRING, &new,
132 DBUS_TYPE_INVALID) || dbus_error_is_set(&error)) {
134 fprintf(stderr, "WARNING: Failed to parse NameOwnerChanged signal: %s\n", error.message);
135 avahi_client_set_errno(client, AVAHI_ERR_DBUS_ERROR);
139 if (strcmp(name, AVAHI_DBUS_NAME) == 0) {
141 if (avahi_client_is_connected(client)) {
143 /* Regardless if the server lost or acquired its name or
144 * if the name was transfered: our services are no longer
145 * available, so we disconnect ourselves */
146 avahi_client_set_errno(client, AVAHI_ERR_DISCONNECTED);
149 } else if (client->state == AVAHI_CLIENT_CONNECTING && (!old || *old == 0)) {
152 /* Server appeared */
154 if ((ret = init_server(client, NULL)) < 0) {
155 avahi_client_set_errno(client, ret);
161 } else if (!avahi_client_is_connected(client)) {
163 /* Ignore messages we get in unconnected state */
165 } else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_SERVER, "StateChanged")) {
170 if (!dbus_message_get_args(
172 DBUS_TYPE_INT32, &state,
173 DBUS_TYPE_STRING, &e,
174 DBUS_TYPE_INVALID) || dbus_error_is_set (&error)) {
176 fprintf(stderr, "WARNING: Failed to parse Server.StateChanged signal: %s\n", error.message);
177 avahi_client_set_errno(client, AVAHI_ERR_DBUS_ERROR);
181 if ((c = avahi_error_dbus_to_number(e)) != AVAHI_OK)
182 avahi_client_set_errno(client, c);
184 client_set_state(client, (AvahiClientState) state);
186 } else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_ENTRY_GROUP, "StateChanged")) {
189 path = dbus_message_get_path(message);
191 for (g = client->groups; g; g = g->groups_next)
192 if (strcmp(g->path, path) == 0)
200 if (!dbus_message_get_args(
202 DBUS_TYPE_INT32, &state,
203 DBUS_TYPE_STRING, &e,
204 DBUS_TYPE_INVALID) ||
205 dbus_error_is_set(&error)) {
207 fprintf(stderr, "WARNING: Failed to parse EntryGroup.StateChanged signal: %s\n", error.message);
208 avahi_client_set_errno(client, AVAHI_ERR_DBUS_ERROR);
212 if ((c = avahi_error_dbus_to_number(e)) != AVAHI_OK)
213 avahi_client_set_errno(client, c);
215 avahi_entry_group_set_state(g, state);
218 } else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_DOMAIN_BROWSER, "ItemNew"))
219 return avahi_domain_browser_event(client, AVAHI_BROWSER_NEW, message);
220 else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_DOMAIN_BROWSER, "ItemRemove"))
221 return avahi_domain_browser_event(client, AVAHI_BROWSER_REMOVE, message);
222 else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_DOMAIN_BROWSER, "CacheExhausted"))
223 return avahi_domain_browser_event(client, AVAHI_BROWSER_CACHE_EXHAUSTED, message);
224 else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_DOMAIN_BROWSER, "AllForNow"))
225 return avahi_domain_browser_event(client, AVAHI_BROWSER_ALL_FOR_NOW, message);
226 else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_DOMAIN_BROWSER, "Failure"))
227 return avahi_domain_browser_event(client, AVAHI_BROWSER_FAILURE, message);
229 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_TYPE_BROWSER, "ItemNew"))
230 return avahi_service_type_browser_event (client, AVAHI_BROWSER_NEW, message);
231 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_TYPE_BROWSER, "ItemRemove"))
232 return avahi_service_type_browser_event (client, AVAHI_BROWSER_REMOVE, message);
233 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_TYPE_BROWSER, "CacheExhausted"))
234 return avahi_service_type_browser_event (client, AVAHI_BROWSER_CACHE_EXHAUSTED, message);
235 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_TYPE_BROWSER, "AllForNow"))
236 return avahi_service_type_browser_event (client, AVAHI_BROWSER_ALL_FOR_NOW, message);
237 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_TYPE_BROWSER, "Failure"))
238 return avahi_service_type_browser_event (client, AVAHI_BROWSER_FAILURE, message);
240 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "ItemNew"))
241 return avahi_service_browser_event (client, AVAHI_BROWSER_NEW, message);
242 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "ItemRemove"))
243 return avahi_service_browser_event (client, AVAHI_BROWSER_REMOVE, message);
244 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "CacheExhausted"))
245 return avahi_service_browser_event (client, AVAHI_BROWSER_CACHE_EXHAUSTED, message);
246 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "AllForNow"))
247 return avahi_service_browser_event (client, AVAHI_BROWSER_ALL_FOR_NOW, message);
248 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "Failure"))
249 return avahi_service_browser_event (client, AVAHI_BROWSER_FAILURE, message);
251 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_RESOLVER, "Found"))
252 return avahi_service_resolver_event (client, AVAHI_RESOLVER_FOUND, message);
253 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_RESOLVER, "Failure"))
254 return avahi_service_resolver_event (client, AVAHI_RESOLVER_FAILURE, message);
256 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_HOST_NAME_RESOLVER, "Found"))
257 return avahi_host_name_resolver_event (client, AVAHI_RESOLVER_FOUND, message);
258 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_HOST_NAME_RESOLVER, "Failure"))
259 return avahi_host_name_resolver_event (client, AVAHI_RESOLVER_FAILURE, message);
261 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_ADDRESS_RESOLVER, "Found"))
262 return avahi_address_resolver_event (client, AVAHI_RESOLVER_FOUND, message);
263 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_ADDRESS_RESOLVER, "Failure"))
264 return avahi_address_resolver_event (client, AVAHI_RESOLVER_FAILURE, message);
266 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_RECORD_BROWSER, "ItemNew"))
267 return avahi_record_browser_event (client, AVAHI_BROWSER_NEW, message);
268 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_RECORD_BROWSER, "ItemRemove"))
269 return avahi_record_browser_event (client, AVAHI_BROWSER_REMOVE, message);
270 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_RECORD_BROWSER, "CacheExhausted"))
271 return avahi_record_browser_event (client, AVAHI_BROWSER_CACHE_EXHAUSTED, message);
272 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_RECORD_BROWSER, "AllForNow"))
273 return avahi_record_browser_event (client, AVAHI_BROWSER_ALL_FOR_NOW, message);
274 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_RECORD_BROWSER, "Failure"))
275 return avahi_record_browser_event (client, AVAHI_BROWSER_FAILURE, message);
279 fprintf(stderr, "WARNING: Unhandled message: interface=%s, path=%s, member=%s\n",
280 dbus_message_get_interface(message),
281 dbus_message_get_path(message),
282 dbus_message_get_member(message));
284 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
287 return DBUS_HANDLER_RESULT_HANDLED;
291 if (dbus_error_is_set(&error)) {
292 avahi_client_set_errno(client, avahi_error_dbus_to_number(error.name));
293 dbus_error_free(&error);
296 client_set_state(client, AVAHI_CLIENT_FAILURE);
298 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
301 static int get_server_state(AvahiClient *client, int *ret_error) {
302 DBusMessage *message = NULL, *reply = NULL;
305 int e = AVAHI_ERR_NO_MEMORY;
309 dbus_error_init(&error);
311 if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "GetState")))
314 reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error);
316 if (!reply || dbus_error_is_set (&error))
319 if (!dbus_message_get_args(reply, &error, DBUS_TYPE_INT32, &state, DBUS_TYPE_INVALID) ||
320 dbus_error_is_set (&error))
323 client_set_state(client, (AvahiServerState) state);
325 dbus_message_unref(message);
326 dbus_message_unref(reply);
331 if (dbus_error_is_set(&error)) {
332 e = avahi_error_dbus_to_number (error.name);
333 dbus_error_free(&error);
340 dbus_message_unref(message);
342 dbus_message_unref(reply);
347 static int check_version(AvahiClient *client, int *ret_error) {
348 DBusMessage *message = NULL, *reply = NULL;
351 int e = AVAHI_ERR_NO_MEMORY;
355 dbus_error_init(&error);
357 if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "GetAPIVersion")))
360 reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error);
362 if (!reply || dbus_error_is_set (&error)) {
365 if (!dbus_error_is_set(&error) || strcmp(error.name, DBUS_ERROR_UNKNOWN_METHOD))
368 /* If the method GetAPIVersion is not known, we look if
369 * GetVersionString matches "avahi 0.6" which is the only
370 * version we support which doesn't have GetAPIVersion() .*/
372 dbus_message_unref(message);
373 if (reply) dbus_message_unref(reply);
374 dbus_error_free(&error);
376 if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "GetVersionString")))
379 reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error);
381 if (!reply || dbus_error_is_set (&error))
384 if (!dbus_message_get_args (reply, &error, DBUS_TYPE_STRING, &version_str, DBUS_TYPE_INVALID) ||
385 dbus_error_is_set (&error))
388 version = strcmp(version_str, "avahi 0.6") == 0 ? 0x0201 : 0x0000;
392 if (!dbus_message_get_args (reply, &error, DBUS_TYPE_UINT32, &version, DBUS_TYPE_INVALID) ||
393 dbus_error_is_set(&error))
397 /*fprintf(stderr, "API Version 0x%04x\n", version);*/
399 if ((version & 0xFF00) != (AVAHI_CLIENT_DBUS_API_SUPPORTED & 0xFF00) ||
400 (version & 0x00FF) < (AVAHI_CLIENT_DBUS_API_SUPPORTED & 0x00FF)) {
401 e = AVAHI_ERR_VERSION_MISMATCH;
405 dbus_message_unref(message);
406 dbus_message_unref(reply);
411 if (dbus_error_is_set(&error)) {
412 e = avahi_error_dbus_to_number (error.name);
413 dbus_error_free(&error);
420 dbus_message_unref(message);
422 dbus_message_unref(reply);
427 static int init_server(AvahiClient *client, int *ret_error) {
430 if ((r = check_version(client, ret_error)) < 0)
433 if ((r = get_server_state(client, ret_error)) < 0)
439 /* This function acts like dbus_bus_get but creates a private
440 * connection instead. Eventually this should be replaced by a DBUS
441 * provided version. */
442 static DBusConnection* avahi_dbus_bus_get(DBusError *error) {
446 if (!(a = getenv("DBUS_SYSTEM_BUS_ADDRESS")) || !*a)
447 a = DBUS_SYSTEM_BUS_DEFAULT_ADDRESS;
449 if (!(c = dbus_connection_open_private(a, error)))
452 dbus_connection_set_exit_on_disconnect(c, FALSE);
454 if (!dbus_bus_register(c, error)) {
455 dbus_connection_close(c);
456 dbus_connection_unref(c);
463 AvahiClient *avahi_client_new(const AvahiPoll *poll_api, AvahiClientFlags flags, AvahiClientCallback callback, void *userdata, int *ret_error) {
464 AvahiClient *client = NULL;
467 dbus_error_init(&error);
469 if (!(client = avahi_new(AvahiClient, 1))) {
471 *ret_error = AVAHI_ERR_NO_MEMORY;
475 client->poll_api = poll_api;
476 client->error = AVAHI_OK;
477 client->callback = callback;
478 client->userdata = userdata;
479 client->state = (AvahiClientState) -1;
480 client->flags = flags;
482 client->host_name = NULL;
483 client->host_name_fqdn = NULL;
484 client->domain_name = NULL;
485 client->version_string = NULL;
486 client->local_service_cookie_valid = 0;
488 AVAHI_LLIST_HEAD_INIT(AvahiEntryGroup, client->groups);
489 AVAHI_LLIST_HEAD_INIT(AvahiDomainBrowser, client->domain_browsers);
490 AVAHI_LLIST_HEAD_INIT(AvahiServiceBrowser, client->service_browsers);
491 AVAHI_LLIST_HEAD_INIT(AvahiServiceTypeBrowser, client->service_type_browsers);
492 AVAHI_LLIST_HEAD_INIT(AvahiServiceResolver, client->service_resolvers);
493 AVAHI_LLIST_HEAD_INIT(AvahiHostNameResolver, client->host_name_resolvers);
494 AVAHI_LLIST_HEAD_INIT(AvahiAddressResolver, client->address_resolvers);
495 AVAHI_LLIST_HEAD_INIT(AvahiRecordBrowser, client->record_browsers);
497 if (!(client->bus = avahi_dbus_bus_get(&error)) || dbus_error_is_set(&error)) {
499 *ret_error = AVAHI_ERR_DBUS_ERROR;
503 if (avahi_dbus_connection_glue(client->bus, poll_api) < 0) {
505 *ret_error = AVAHI_ERR_NO_MEMORY; /* Not optimal */
509 if (!dbus_connection_add_filter (client->bus, filter_func, client, NULL)) {
511 *ret_error = AVAHI_ERR_NO_MEMORY;
518 "interface='" AVAHI_DBUS_INTERFACE_SERVER "', "
519 "sender='" AVAHI_DBUS_NAME "', "
520 "path='" AVAHI_DBUS_PATH_SERVER "'",
523 if (dbus_error_is_set(&error))
529 "interface='" DBUS_INTERFACE_DBUS "', "
530 "sender='" DBUS_SERVICE_DBUS "', "
531 "path='" DBUS_PATH_DBUS "'",
534 if (dbus_error_is_set(&error))
540 "interface='" DBUS_INTERFACE_LOCAL "'",
543 if (dbus_error_is_set(&error))
547 if (!(dbus_bus_name_has_owner(client->bus, AVAHI_DBUS_NAME, &error)) ||
548 dbus_error_is_set(&error)) {
550 /* We free the error so its not set, that way the fail target
551 * will return the NO_DAEMON error rather than a DBUS error */
552 dbus_error_free(&error);
554 if (!(flags & AVAHI_CLIENT_NO_FAIL)) {
557 *ret_error = AVAHI_ERR_NO_DAEMON;
562 /* The user doesn't want this call to fail if the daemon is not
563 * available, so let's return succesfully */
564 client_set_state(client, AVAHI_CLIENT_CONNECTING);
568 if (init_server(client, ret_error) < 0)
577 avahi_client_free(client);
579 if (dbus_error_is_set(&error)) {
582 if (strcmp(error.name, DBUS_ERROR_FILE_NOT_FOUND) == 0)
583 /* DBUS returns this error when the DBUS daemon is not running */
584 *ret_error = AVAHI_ERR_NO_DAEMON;
586 *ret_error = avahi_error_dbus_to_number(error.name);
589 dbus_error_free(&error);
595 void avahi_client_free(AvahiClient *client) {
598 while (client->groups)
599 avahi_entry_group_free(client->groups);
601 while (client->domain_browsers)
602 avahi_domain_browser_free(client->domain_browsers);
604 while (client->service_browsers)
605 avahi_service_browser_free(client->service_browsers);
607 while (client->service_type_browsers)
608 avahi_service_type_browser_free(client->service_type_browsers);
610 while (client->service_resolvers)
611 avahi_service_resolver_free(client->service_resolvers);
613 while (client->host_name_resolvers)
614 avahi_host_name_resolver_free(client->host_name_resolvers);
616 while (client->address_resolvers)
617 avahi_address_resolver_free(client->address_resolvers);
619 while (client->record_browsers)
620 avahi_record_browser_free(client->record_browsers);
623 dbus_connection_disconnect(client->bus);
624 dbus_connection_unref(client->bus);
627 avahi_free(client->version_string);
628 avahi_free(client->host_name);
629 avahi_free(client->host_name_fqdn);
630 avahi_free(client->domain_name);
635 static char* avahi_client_get_string_reply_and_block (AvahiClient *client, const char *method, const char *param) {
636 DBusMessage *message = NULL, *reply = NULL;
643 dbus_error_init (&error);
645 if (!(message = dbus_message_new_method_call (AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, method))) {
646 avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
651 if (!dbus_message_append_args (message, DBUS_TYPE_STRING, ¶m, DBUS_TYPE_INVALID)) {
652 avahi_client_set_errno (client, AVAHI_ERR_NO_MEMORY);
657 reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error);
659 if (!reply || dbus_error_is_set (&error))
662 if (!dbus_message_get_args (reply, &error, DBUS_TYPE_STRING, &ret, DBUS_TYPE_INVALID) ||
663 dbus_error_is_set (&error))
666 if (!(n = avahi_strdup(ret))) {
667 avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
671 dbus_message_unref(message);
672 dbus_message_unref(reply);
679 dbus_message_unref(message);
681 dbus_message_unref(reply);
683 if (dbus_error_is_set(&error)) {
684 avahi_client_set_dbus_error(client, &error);
685 dbus_error_free(&error);
691 const char* avahi_client_get_version_string(AvahiClient *client) {
694 if (!avahi_client_is_connected(client)) {
695 avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
699 if (!client->version_string)
700 client->version_string = avahi_client_get_string_reply_and_block(client, "GetVersionString", NULL);
702 return client->version_string;
705 const char* avahi_client_get_domain_name(AvahiClient *client) {
708 if (!avahi_client_is_connected(client)) {
709 avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
713 if (!client->domain_name)
714 client->domain_name = avahi_client_get_string_reply_and_block(client, "GetDomainName", NULL);
716 return client->domain_name;
719 const char* avahi_client_get_host_name(AvahiClient *client) {
722 if (!avahi_client_is_connected(client)) {
723 avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
727 if (!client->host_name)
728 client->host_name = avahi_client_get_string_reply_and_block(client, "GetHostName", NULL);
730 return client->host_name;
733 const char* avahi_client_get_host_name_fqdn (AvahiClient *client) {
736 if (!avahi_client_is_connected(client)) {
737 avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
741 if (!client->host_name_fqdn)
742 client->host_name_fqdn = avahi_client_get_string_reply_and_block(client, "GetHostNameFqdn", NULL);
744 return client->host_name_fqdn;
747 AvahiClientState avahi_client_get_state(AvahiClient *client) {
750 return client->state;
753 int avahi_client_errno(AvahiClient *client) {
756 return client->error;
759 /* Just for internal use */
760 int avahi_client_simple_method_call(AvahiClient *client, const char *path, const char *interface, const char *method) {
761 DBusMessage *message = NULL, *reply = NULL;
765 dbus_error_init(&error);
772 if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, path, interface, method))) {
773 r = avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
777 if (!(reply = dbus_connection_send_with_reply_and_block(client->bus, message, -1, &error)) ||
778 dbus_error_is_set (&error)) {
779 r = avahi_client_set_errno(client, AVAHI_ERR_DBUS_ERROR);
783 if (!dbus_message_get_args(reply, &error, DBUS_TYPE_INVALID) ||
784 dbus_error_is_set (&error)) {
785 r = avahi_client_set_errno(client, AVAHI_ERR_DBUS_ERROR);
789 dbus_message_unref(message);
790 dbus_message_unref(reply);
795 if (dbus_error_is_set(&error)) {
796 r = avahi_client_set_dbus_error(client, &error);
797 dbus_error_free(&error);
801 dbus_message_unref(message);
804 dbus_message_unref(reply);
809 uint32_t avahi_client_get_local_service_cookie(AvahiClient *client) {
810 DBusMessage *message = NULL, *reply = NULL;
814 if (!avahi_client_is_connected(client)) {
815 avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
816 return AVAHI_SERVICE_COOKIE_INVALID;
819 if (client->local_service_cookie_valid)
820 return client->local_service_cookie;
822 dbus_error_init (&error);
824 if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "GetLocalServiceCookie"))) {
825 avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
829 reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error);
831 if (!reply || dbus_error_is_set (&error))
834 if (!dbus_message_get_args (reply, &error, DBUS_TYPE_UINT32, &client->local_service_cookie, DBUS_TYPE_INVALID) ||
835 dbus_error_is_set (&error))
838 dbus_message_unref(message);
839 dbus_message_unref(reply);
841 client->local_service_cookie_valid = 1;
842 return client->local_service_cookie;
847 dbus_message_unref(message);
849 dbus_message_unref(reply);
851 if (dbus_error_is_set(&error)) {
852 avahi_client_set_dbus_error(client, &error);
853 dbus_error_free(&error);
856 return AVAHI_SERVICE_COOKIE_INVALID;
859 int avahi_client_is_connected(AvahiClient *client) {
862 return client->state == AVAHI_CLIENT_S_RUNNING || client->state == AVAHI_CLIENT_S_REGISTERING || client->state == AVAHI_CLIENT_S_COLLISION;