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 static int init_server(AvahiClient *client, int *ret_error);
44 int avahi_client_set_errno (AvahiClient *client, int error) {
47 return client->error = error;
50 int avahi_client_set_dbus_error(AvahiClient *client, DBusError *error) {
54 return avahi_client_set_errno(client, avahi_error_dbus_to_number(error->name));
57 static void client_set_state (AvahiClient *client, AvahiServerState state) {
60 if (client->state == state)
63 client->state = state;
65 switch (client->state) {
66 case AVAHI_CLIENT_FAILURE:
68 dbus_connection_disconnect(client->bus);
69 dbus_connection_unref(client->bus);
75 case AVAHI_CLIENT_S_COLLISION:
76 case AVAHI_CLIENT_S_REGISTERING:
78 /* Clear cached strings */
79 avahi_free(client->host_name);
80 avahi_free(client->host_name_fqdn);
81 avahi_free(client->domain_name);
83 client->host_name = NULL;
84 client->host_name_fqdn = NULL;
85 client->domain_name = NULL;
88 case AVAHI_CLIENT_S_RUNNING:
89 case AVAHI_CLIENT_CONNECTING:
95 client->callback (client, state, client->userdata);
98 static DBusHandlerResult filter_func(DBusConnection *bus, DBusMessage *message, void *userdata) {
99 AvahiClient *client = userdata;
105 dbus_error_init(&error);
107 /* fprintf(stderr, "dbus: interface=%s, path=%s, member=%s\n", */
108 /* dbus_message_get_interface (message), */
109 /* dbus_message_get_path (message), */
110 /* dbus_message_get_member (message)); */
112 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
114 /* The DBUS server died or kicked us */
115 avahi_client_set_errno(client, AVAHI_ERR_DISCONNECTED);
118 } else if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameAcquired")) {
120 /* Ignore this message */
122 } else if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameOwnerChanged")) {
123 char *name, *old, *new;
125 if (!dbus_message_get_args(
127 DBUS_TYPE_STRING, &name,
128 DBUS_TYPE_STRING, &old,
129 DBUS_TYPE_STRING, &new,
130 DBUS_TYPE_INVALID) || dbus_error_is_set(&error)) {
132 fprintf(stderr, "WARNING: Failed to parse NameOwnerChanged signal: %s\n", error.message);
133 avahi_client_set_errno(client, AVAHI_ERR_DBUS_ERROR);
137 if (strcmp(name, AVAHI_DBUS_NAME) == 0) {
139 if (avahi_client_is_connected(client)) {
141 /* Regardless if the server lost or acquired its name or
142 * if the name was transfered: our services are no longer
143 * available, so we disconnect ourselves */
144 avahi_client_set_errno(client, AVAHI_ERR_DISCONNECTED);
147 } else if (client->state == AVAHI_CLIENT_CONNECTING && (!old || *old == 0)) {
150 /* Server appeared */
152 if ((ret = init_server(client, NULL)) < 0) {
153 avahi_client_set_errno(client, ret);
159 } else if (!avahi_client_is_connected(client)) {
161 /* Ignore messages we get in unconnected state */
163 } else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_SERVER, "StateChanged")) {
168 if (!dbus_message_get_args(
170 DBUS_TYPE_INT32, &state,
171 DBUS_TYPE_STRING, &e,
172 DBUS_TYPE_INVALID) || dbus_error_is_set (&error)) {
174 fprintf(stderr, "WARNING: Failed to parse Server.StateChanged signal: %s\n", error.message);
175 avahi_client_set_errno(client, AVAHI_ERR_DBUS_ERROR);
179 if ((c = avahi_error_dbus_to_number(e)) != AVAHI_OK)
180 avahi_client_set_errno(client, c);
182 client_set_state(client, (AvahiClientState) state);
184 } else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_ENTRY_GROUP, "StateChanged")) {
187 path = dbus_message_get_path(message);
189 for (g = client->groups; g; g = g->groups_next)
190 if (strcmp(g->path, path) == 0)
198 if (!dbus_message_get_args(
200 DBUS_TYPE_INT32, &state,
201 DBUS_TYPE_STRING, &e,
202 DBUS_TYPE_INVALID) ||
203 dbus_error_is_set(&error)) {
205 fprintf(stderr, "WARNING: Failed to parse EntryGroup.StateChanged signal: %s\n", error.message);
206 avahi_client_set_errno(client, AVAHI_ERR_DBUS_ERROR);
210 if ((c = avahi_error_dbus_to_number(e)) != AVAHI_OK)
211 avahi_client_set_errno(client, c);
213 avahi_entry_group_set_state(g, state);
216 } else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_DOMAIN_BROWSER, "ItemNew"))
217 return avahi_domain_browser_event(client, AVAHI_BROWSER_NEW, message);
218 else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_DOMAIN_BROWSER, "ItemRemove"))
219 return avahi_domain_browser_event(client, AVAHI_BROWSER_REMOVE, message);
220 else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_DOMAIN_BROWSER, "CacheExhausted"))
221 return avahi_domain_browser_event(client, AVAHI_BROWSER_CACHE_EXHAUSTED, message);
222 else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_DOMAIN_BROWSER, "AllForNow"))
223 return avahi_domain_browser_event(client, AVAHI_BROWSER_ALL_FOR_NOW, message);
224 else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_DOMAIN_BROWSER, "Failure"))
225 return avahi_domain_browser_event(client, AVAHI_BROWSER_FAILURE, message);
227 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_TYPE_BROWSER, "ItemNew"))
228 return avahi_service_type_browser_event (client, AVAHI_BROWSER_NEW, message);
229 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_TYPE_BROWSER, "ItemRemove"))
230 return avahi_service_type_browser_event (client, AVAHI_BROWSER_REMOVE, message);
231 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_TYPE_BROWSER, "CacheExhausted"))
232 return avahi_service_type_browser_event (client, AVAHI_BROWSER_CACHE_EXHAUSTED, message);
233 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_TYPE_BROWSER, "AllForNow"))
234 return avahi_service_type_browser_event (client, AVAHI_BROWSER_ALL_FOR_NOW, message);
235 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_TYPE_BROWSER, "Failure"))
236 return avahi_service_type_browser_event (client, AVAHI_BROWSER_FAILURE, message);
238 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "ItemNew"))
239 return avahi_service_browser_event (client, AVAHI_BROWSER_NEW, message);
240 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "ItemRemove"))
241 return avahi_service_browser_event (client, AVAHI_BROWSER_REMOVE, message);
242 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "CacheExhausted"))
243 return avahi_service_browser_event (client, AVAHI_BROWSER_CACHE_EXHAUSTED, message);
244 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "AllForNow"))
245 return avahi_service_browser_event (client, AVAHI_BROWSER_ALL_FOR_NOW, message);
246 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "Failure"))
247 return avahi_service_browser_event (client, AVAHI_BROWSER_FAILURE, message);
249 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_RESOLVER, "Found"))
250 return avahi_service_resolver_event (client, AVAHI_RESOLVER_FOUND, message);
251 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_RESOLVER, "Failure"))
252 return avahi_service_resolver_event (client, AVAHI_RESOLVER_FAILURE, message);
254 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_HOST_NAME_RESOLVER, "Found"))
255 return avahi_host_name_resolver_event (client, AVAHI_RESOLVER_FOUND, message);
256 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_HOST_NAME_RESOLVER, "Failure"))
257 return avahi_host_name_resolver_event (client, AVAHI_RESOLVER_FAILURE, message);
259 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_ADDRESS_RESOLVER, "Found"))
260 return avahi_address_resolver_event (client, AVAHI_RESOLVER_FOUND, message);
261 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_ADDRESS_RESOLVER, "Failure"))
262 return avahi_address_resolver_event (client, AVAHI_RESOLVER_FAILURE, message);
264 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_RECORD_BROWSER, "ItemNew"))
265 return avahi_record_browser_event (client, AVAHI_BROWSER_NEW, message);
266 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_RECORD_BROWSER, "ItemRemove"))
267 return avahi_record_browser_event (client, AVAHI_BROWSER_REMOVE, message);
268 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_RECORD_BROWSER, "CacheExhausted"))
269 return avahi_record_browser_event (client, AVAHI_BROWSER_CACHE_EXHAUSTED, message);
270 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_RECORD_BROWSER, "AllForNow"))
271 return avahi_record_browser_event (client, AVAHI_BROWSER_ALL_FOR_NOW, message);
272 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_RECORD_BROWSER, "Failure"))
273 return avahi_record_browser_event (client, AVAHI_BROWSER_FAILURE, message);
277 fprintf(stderr, "WARNING: Unhandled message: interface=%s, path=%s, member=%s\n",
278 dbus_message_get_interface(message),
279 dbus_message_get_path(message),
280 dbus_message_get_member(message));
282 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
285 return DBUS_HANDLER_RESULT_HANDLED;
289 if (dbus_error_is_set(&error)) {
290 avahi_client_set_errno(client, avahi_error_dbus_to_number(error.name));
291 dbus_error_free(&error);
294 client_set_state(client, AVAHI_CLIENT_FAILURE);
296 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
299 static int get_server_state(AvahiClient *client, int *ret_error) {
300 DBusMessage *message = NULL, *reply = NULL;
303 int e = AVAHI_ERR_NO_MEMORY;
307 dbus_error_init(&error);
309 if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "GetState")))
312 reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error);
314 if (!reply || dbus_error_is_set (&error))
317 if (!dbus_message_get_args(reply, &error, DBUS_TYPE_INT32, &state, DBUS_TYPE_INVALID) ||
318 dbus_error_is_set (&error))
321 client_set_state(client, (AvahiServerState) state);
323 dbus_message_unref(message);
324 dbus_message_unref(reply);
329 if (dbus_error_is_set(&error)) {
330 e = avahi_error_dbus_to_number (error.name);
331 dbus_error_free(&error);
338 dbus_message_unref(message);
340 dbus_message_unref(reply);
345 static int check_version(AvahiClient *client, int *ret_error) {
346 DBusMessage *message = NULL, *reply = NULL;
349 int e = AVAHI_ERR_NO_MEMORY;
353 dbus_error_init(&error);
355 if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "GetVersionString")))
358 reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error);
360 if (!reply || dbus_error_is_set (&error))
363 if (!dbus_message_get_args (reply, &error, DBUS_TYPE_STRING, &version, DBUS_TYPE_INVALID) ||
364 dbus_error_is_set (&error))
367 if (strcmp(version, PACKAGE_STRING) != 0) {
368 e = AVAHI_ERR_VERSION_MISMATCH;
372 dbus_message_unref(message);
373 dbus_message_unref(reply);
378 if (dbus_error_is_set(&error)) {
379 e = avahi_error_dbus_to_number (error.name);
380 dbus_error_free(&error);
387 dbus_message_unref(message);
389 dbus_message_unref(reply);
394 static int init_server(AvahiClient *client, int *ret_error) {
397 if ((r = check_version(client, ret_error)) < 0)
400 if ((r = get_server_state(client, ret_error)) < 0)
406 /* This function acts like dbus_bus_get but creates a private
407 * connection instead */
408 static DBusConnection* avahi_dbus_bus_get(DBusError *error) {
412 if (!(a = getenv("DBUS_SYSTEM_BUS_ADDRESS")) || !*a)
413 a = DBUS_SYSTEM_BUS_DEFAULT_ADDRESS;
415 if (!(c = dbus_connection_open_private(a, error)))
418 dbus_connection_set_exit_on_disconnect(c, FALSE);
420 if (!dbus_bus_register(c, error)) {
421 dbus_connection_close(c);
422 dbus_connection_unref(c);
429 AvahiClient *avahi_client_new(const AvahiPoll *poll_api, AvahiClientFlags flags, AvahiClientCallback callback, void *userdata, int *ret_error) {
430 AvahiClient *client = NULL;
433 dbus_error_init(&error);
435 if (!(client = avahi_new(AvahiClient, 1))) {
437 *ret_error = AVAHI_ERR_NO_MEMORY;
441 client->poll_api = poll_api;
442 client->error = AVAHI_OK;
443 client->callback = callback;
444 client->userdata = userdata;
445 client->state = (AvahiClientState) -1;
446 client->flags = flags;
448 client->host_name = NULL;
449 client->host_name_fqdn = NULL;
450 client->domain_name = NULL;
451 client->version_string = NULL;
452 client->local_service_cookie_valid = 0;
454 AVAHI_LLIST_HEAD_INIT(AvahiEntryGroup, client->groups);
455 AVAHI_LLIST_HEAD_INIT(AvahiDomainBrowser, client->domain_browsers);
456 AVAHI_LLIST_HEAD_INIT(AvahiServiceBrowser, client->service_browsers);
457 AVAHI_LLIST_HEAD_INIT(AvahiServiceTypeBrowser, client->service_type_browsers);
458 AVAHI_LLIST_HEAD_INIT(AvahiServiceResolver, client->service_resolvers);
459 AVAHI_LLIST_HEAD_INIT(AvahiHostNameResolver, client->host_name_resolvers);
460 AVAHI_LLIST_HEAD_INIT(AvahiAddressResolver, client->address_resolvers);
461 AVAHI_LLIST_HEAD_INIT(AvahiRecordBrowser, client->record_browsers);
463 if (!(client->bus = avahi_dbus_bus_get(&error)) || dbus_error_is_set(&error)) {
465 *ret_error = AVAHI_ERR_DBUS_ERROR;
469 if (avahi_dbus_connection_glue(client->bus, poll_api) < 0) {
471 *ret_error = AVAHI_ERR_NO_MEMORY; /* Not optimal */
475 if (!dbus_connection_add_filter (client->bus, filter_func, client, NULL)) {
477 *ret_error = AVAHI_ERR_NO_MEMORY;
484 "interface='" AVAHI_DBUS_INTERFACE_SERVER "', "
485 "sender='" AVAHI_DBUS_NAME "', "
486 "path='" AVAHI_DBUS_PATH_SERVER "'",
489 if (dbus_error_is_set(&error))
495 "interface='" DBUS_INTERFACE_DBUS "', "
496 "sender='" DBUS_SERVICE_DBUS "', "
497 "path='" DBUS_PATH_DBUS "'",
500 if (dbus_error_is_set(&error))
506 "interface='" DBUS_INTERFACE_LOCAL "'",
509 if (dbus_error_is_set(&error))
513 if (!(dbus_bus_name_has_owner(client->bus, AVAHI_DBUS_NAME, &error)) ||
514 dbus_error_is_set(&error)) {
516 /* We free the error so its not set, that way the fail target
517 * will return the NO_DAEMON error rather than a DBUS error */
518 dbus_error_free(&error);
520 if (!(flags & AVAHI_CLIENT_NO_FAIL)) {
523 *ret_error = AVAHI_ERR_NO_DAEMON;
528 /* The user doesn't want this call to fail if the daemon is not
529 * available, so let's return succesfully */
530 client_set_state(client, AVAHI_CLIENT_CONNECTING);
534 if (init_server(client, ret_error) < 0)
543 avahi_client_free(client);
545 if (dbus_error_is_set(&error)) {
548 *ret_error = avahi_error_dbus_to_number(error.name);
550 dbus_error_free(&error);
556 void avahi_client_free(AvahiClient *client) {
559 while (client->groups)
560 avahi_entry_group_free(client->groups);
562 while (client->domain_browsers)
563 avahi_domain_browser_free(client->domain_browsers);
565 while (client->service_browsers)
566 avahi_service_browser_free(client->service_browsers);
568 while (client->service_type_browsers)
569 avahi_service_type_browser_free(client->service_type_browsers);
571 while (client->service_resolvers)
572 avahi_service_resolver_free(client->service_resolvers);
574 while (client->host_name_resolvers)
575 avahi_host_name_resolver_free(client->host_name_resolvers);
577 while (client->address_resolvers)
578 avahi_address_resolver_free(client->address_resolvers);
580 while (client->record_browsers)
581 avahi_record_browser_free(client->record_browsers);
584 dbus_connection_disconnect(client->bus);
585 dbus_connection_unref(client->bus);
588 avahi_free(client->version_string);
589 avahi_free(client->host_name);
590 avahi_free(client->host_name_fqdn);
591 avahi_free(client->domain_name);
596 static char* avahi_client_get_string_reply_and_block (AvahiClient *client, const char *method, const char *param) {
597 DBusMessage *message = NULL, *reply = NULL;
604 dbus_error_init (&error);
606 if (!(message = dbus_message_new_method_call (AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, method))) {
607 avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
612 if (!dbus_message_append_args (message, DBUS_TYPE_STRING, ¶m, DBUS_TYPE_INVALID)) {
613 avahi_client_set_errno (client, AVAHI_ERR_NO_MEMORY);
618 reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error);
620 if (!reply || dbus_error_is_set (&error))
623 if (!dbus_message_get_args (reply, &error, DBUS_TYPE_STRING, &ret, DBUS_TYPE_INVALID) ||
624 dbus_error_is_set (&error))
627 if (!(n = avahi_strdup(ret))) {
628 avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
632 dbus_message_unref(message);
633 dbus_message_unref(reply);
640 dbus_message_unref(message);
642 dbus_message_unref(reply);
644 if (dbus_error_is_set(&error)) {
645 avahi_client_set_dbus_error(client, &error);
646 dbus_error_free(&error);
652 const char* avahi_client_get_version_string(AvahiClient *client) {
655 if (!avahi_client_is_connected(client)) {
656 avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
660 if (!client->version_string)
661 client->version_string = avahi_client_get_string_reply_and_block(client, "GetVersionString", NULL);
663 return client->version_string;
666 const char* avahi_client_get_domain_name(AvahiClient *client) {
669 if (!avahi_client_is_connected(client)) {
670 avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
674 if (!client->domain_name)
675 client->domain_name = avahi_client_get_string_reply_and_block(client, "GetDomainName", NULL);
677 return client->domain_name;
680 const char* avahi_client_get_host_name(AvahiClient *client) {
683 if (!avahi_client_is_connected(client)) {
684 avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
688 if (!client->host_name)
689 client->host_name = avahi_client_get_string_reply_and_block(client, "GetHostName", NULL);
691 return client->host_name;
694 const char* avahi_client_get_host_name_fqdn (AvahiClient *client) {
697 if (!avahi_client_is_connected(client)) {
698 avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
702 if (!client->host_name_fqdn)
703 client->host_name_fqdn = avahi_client_get_string_reply_and_block(client, "GetHostNameFqdn", NULL);
705 return client->host_name_fqdn;
708 AvahiClientState avahi_client_get_state(AvahiClient *client) {
711 return client->state;
714 int avahi_client_errno(AvahiClient *client) {
717 return client->error;
720 /* Just for internal use */
721 int avahi_client_simple_method_call(AvahiClient *client, const char *path, const char *interface, const char *method) {
722 DBusMessage *message = NULL, *reply = NULL;
726 dbus_error_init(&error);
733 if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, path, interface, method))) {
734 r = avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
738 if (!(reply = dbus_connection_send_with_reply_and_block(client->bus, message, -1, &error)) ||
739 dbus_error_is_set (&error)) {
740 r = avahi_client_set_errno(client, AVAHI_ERR_DBUS_ERROR);
744 if (!dbus_message_get_args(reply, &error, DBUS_TYPE_INVALID) ||
745 dbus_error_is_set (&error)) {
746 r = avahi_client_set_errno(client, AVAHI_ERR_DBUS_ERROR);
750 dbus_message_unref(message);
751 dbus_message_unref(reply);
756 if (dbus_error_is_set(&error)) {
757 r = avahi_client_set_dbus_error(client, &error);
758 dbus_error_free(&error);
762 dbus_message_unref(message);
765 dbus_message_unref(reply);
770 uint32_t avahi_client_get_local_service_cookie(AvahiClient *client) {
771 DBusMessage *message = NULL, *reply = NULL;
775 if (!avahi_client_is_connected(client)) {
776 avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
777 return AVAHI_SERVICE_COOKIE_INVALID;
780 if (client->local_service_cookie_valid)
781 return client->local_service_cookie;
783 dbus_error_init (&error);
785 if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "GetLocalServiceCookie"))) {
786 avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
790 reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error);
792 if (!reply || dbus_error_is_set (&error))
795 if (!dbus_message_get_args (reply, &error, DBUS_TYPE_UINT32, &client->local_service_cookie, DBUS_TYPE_INVALID) ||
796 dbus_error_is_set (&error))
799 dbus_message_unref(message);
800 dbus_message_unref(reply);
802 client->local_service_cookie_valid = 1;
803 return client->local_service_cookie;
808 dbus_message_unref(message);
810 dbus_message_unref(reply);
812 if (dbus_error_is_set(&error)) {
813 avahi_client_set_dbus_error(client, &error);
814 dbus_error_free(&error);
817 return AVAHI_SERVICE_COOKIE_INVALID;
820 int avahi_client_is_connected(AvahiClient *client) {
823 return client->state == AVAHI_CLIENT_S_RUNNING || client->state == AVAHI_CLIENT_S_REGISTERING || client->state == AVAHI_CLIENT_S_COLLISION;