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 int avahi_client_set_errno (AvahiClient *client, int error) {
45 return client->error = error;
48 int avahi_client_set_dbus_error(AvahiClient *client, DBusError *error) {
52 return avahi_client_set_errno(client, avahi_error_dbus_to_number(error->name));
55 static void client_set_state (AvahiClient *client, AvahiServerState state) {
58 if (client->state == state)
61 client->state = state;
63 switch (client->state) {
64 case AVAHI_CLIENT_DISCONNECTED:
66 dbus_connection_disconnect(client->bus);
67 dbus_connection_unref(client->bus);
73 case AVAHI_CLIENT_S_COLLISION:
74 case AVAHI_CLIENT_S_REGISTERING:
76 /* Clear cached strings */
77 avahi_free(client->host_name);
78 avahi_free(client->host_name_fqdn);
79 avahi_free(client->domain_name);
81 client->host_name = NULL;
82 client->host_name_fqdn = NULL;
83 client->domain_name = NULL;
86 case AVAHI_CLIENT_S_INVALID:
87 case AVAHI_CLIENT_S_RUNNING:
93 client->callback (client, state, client->userdata);
96 static DBusHandlerResult filter_func(DBusConnection *bus, DBusMessage *message, void *userdata) {
97 AvahiClient *client = userdata;
103 dbus_error_init (&error);
105 /* fprintf(stderr, "dbus: interface=%s, path=%s, member=%s\n", */
106 /* dbus_message_get_interface (message), */
107 /* dbus_message_get_path (message), */
108 /* dbus_message_get_member (message)); */
110 if (client->state == AVAHI_CLIENT_DISCONNECTED)
113 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
115 /* The DBUS server died or kicked us */
116 client_set_state(client, AVAHI_CLIENT_DISCONNECTED);
118 } if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameOwnerChanged")) {
119 char *name, *old, *new;
121 if (!(dbus_message_get_args(
123 DBUS_TYPE_STRING, &name,
124 DBUS_TYPE_STRING, &old,
125 DBUS_TYPE_STRING, &new,
126 DBUS_TYPE_INVALID) || dbus_error_is_set (&error))) {
128 fprintf(stderr, "WARNING: Failed to parse NameOwnerChanged signal: %s\n", error.message);
132 if (strcmp(name, AVAHI_DBUS_NAME) == 0)
134 /* Regardless if the server lost or acquired its name or
135 * if the name was transfered: our services are no longer
136 * available, so we disconnect ourselves */
138 client_set_state(client, AVAHI_CLIENT_DISCONNECTED);
140 } else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_SERVER, "StateChanged")) {
143 if (!(dbus_message_get_args(
145 DBUS_TYPE_INT32, &state,
146 DBUS_TYPE_INVALID) || dbus_error_is_set (&error))) {
147 fprintf(stderr, "WARNING: Failed to parse Server.StateChanged signal: %s\n", error.message);
151 client_set_state(client, (AvahiClientState) state);
153 } else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_ENTRY_GROUP, "StateChanged")) {
156 path = dbus_message_get_path(message);
158 for (g = client->groups; g; g = g->groups_next)
159 if (strcmp(g->path, path) == 0)
164 if (!(dbus_message_get_args (message, &error, DBUS_TYPE_INT32, &state, DBUS_TYPE_INVALID)) ||
165 dbus_error_is_set(&error)) {
166 fprintf(stderr, "WARNING: Failed to parse EntryGroup.StateChanged signal: %s\n", error.message);
170 avahi_entry_group_set_state(g, state);
173 } else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_DOMAIN_BROWSER, "ItemNew"))
174 return avahi_domain_browser_event(client, AVAHI_BROWSER_NEW, message);
175 else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_DOMAIN_BROWSER, "ItemRemove"))
176 return avahi_domain_browser_event(client, AVAHI_BROWSER_REMOVE, message);
178 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_TYPE_BROWSER, "ItemNew"))
179 return avahi_service_type_browser_event (client, AVAHI_BROWSER_NEW, message);
180 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_TYPE_BROWSER, "ItemRemove"))
181 return avahi_service_type_browser_event (client, AVAHI_BROWSER_REMOVE, message);
183 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "ItemNew"))
184 return avahi_service_browser_event (client, AVAHI_BROWSER_NEW, message);
185 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "ItemRemove"))
186 return avahi_service_browser_event (client, AVAHI_BROWSER_REMOVE, message);
188 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_RESOLVER, "Found"))
189 return avahi_service_resolver_event (client, AVAHI_RESOLVER_FOUND, message);
190 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_RESOLVER, "Timeout"))
191 return avahi_service_resolver_event (client, AVAHI_RESOLVER_TIMEOUT, message);
193 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_HOST_NAME_RESOLVER, "Found"))
194 return avahi_host_name_resolver_event (client, AVAHI_RESOLVER_FOUND, message);
195 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_HOST_NAME_RESOLVER, "Timeout"))
196 return avahi_host_name_resolver_event (client, AVAHI_RESOLVER_TIMEOUT, message);
198 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_ADDRESS_RESOLVER, "Found"))
199 return avahi_address_resolver_event (client, AVAHI_RESOLVER_FOUND, message);
200 else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_ADDRESS_RESOLVER, "Timeout"))
201 return avahi_address_resolver_event (client, AVAHI_RESOLVER_TIMEOUT, message);
204 return DBUS_HANDLER_RESULT_HANDLED;
208 dbus_error_free (&error);
209 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
212 static int get_server_state(AvahiClient *client, int *ret_error) {
213 DBusMessage *message, *reply;
220 dbus_error_init(&error);
222 if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "GetState")))
225 reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error);
226 dbus_message_unref(message);
231 if (!(dbus_message_get_args(reply, &error, DBUS_TYPE_INT32, &state, DBUS_TYPE_INVALID)))
234 client_set_state(client, (AvahiServerState) state);
236 *ret_error = AVAHI_OK;
240 if (dbus_error_is_set(&error)) {
241 e = avahi_error_dbus_to_number (error.name);
242 dbus_error_free(&error);
244 e = AVAHI_ERR_NO_MEMORY;
252 /* This function acts like dbus_bus_get but creates a private
253 * connection instead */
254 static DBusConnection*
255 avahi_dbus_bus_get (DBusError *error)
257 DBusConnection *conn;
258 const char *env_addr;
260 env_addr = getenv ("DBUS_SYSTEM_BUS_ADDRESS");
262 if (env_addr == NULL || (*env_addr == 0))
264 env_addr = DBUS_SYSTEM_BUS_DEFAULT_ADDRESS;
267 conn = dbus_connection_open_private (env_addr, error);
272 dbus_connection_set_exit_on_disconnect (conn, FALSE);
274 if (!dbus_bus_register (conn, error))
276 dbus_connection_close (conn);
277 dbus_connection_unref (conn);
285 AvahiClient *avahi_client_new(const AvahiPoll *poll_api, AvahiClientCallback callback, void *userdata, int *ret_error) {
286 AvahiClient *client = NULL;
289 dbus_error_init (&error);
291 if (!(client = avahi_new(AvahiClient, 1))) {
293 *ret_error = AVAHI_ERR_NO_MEMORY;
297 client->poll_api = poll_api;
298 client->error = AVAHI_OK;
299 client->callback = callback;
300 client->userdata = userdata;
301 client->state = AVAHI_CLIENT_DISCONNECTED;
303 client->host_name = NULL;
304 client->host_name_fqdn = NULL;
305 client->domain_name = NULL;
306 client->version_string = NULL;
307 client->local_service_cookie_valid = 0;
309 AVAHI_LLIST_HEAD_INIT(AvahiEntryGroup, client->groups);
310 AVAHI_LLIST_HEAD_INIT(AvahiDomainBrowser, client->domain_browsers);
311 AVAHI_LLIST_HEAD_INIT(AvahiServiceBrowser, client->service_browsers);
312 AVAHI_LLIST_HEAD_INIT(AvahiServiceTypeBrowser, client->service_type_browsers);
313 AVAHI_LLIST_HEAD_INIT(AvahiServiceResolver, client->service_resolvers);
314 AVAHI_LLIST_HEAD_INIT(AvahiHostNameResolver, client->host_name_resolvers);
315 AVAHI_LLIST_HEAD_INIT(AvahiAddressResolver, client->address_resolvers);
317 if (!(client->bus = avahi_dbus_bus_get(&error)) ||
318 dbus_error_is_set (&error))
321 if (avahi_dbus_connection_glue(client->bus, poll_api) < 0) {
323 *ret_error = AVAHI_ERR_NO_MEMORY; /* Not optimal */
327 if (!dbus_connection_add_filter (client->bus, filter_func, client, NULL)) {
329 *ret_error = AVAHI_ERR_NO_MEMORY;
336 "interface='" AVAHI_DBUS_INTERFACE_SERVER "', "
337 "sender='" AVAHI_DBUS_NAME "', "
338 "path='" AVAHI_DBUS_PATH_SERVER "'",
341 if (dbus_error_is_set (&error))
347 "interface='" DBUS_INTERFACE_DBUS "', "
348 "sender='" DBUS_SERVICE_DBUS "', "
349 "path='" DBUS_PATH_DBUS "'",
352 if (dbus_error_is_set (&error))
358 "interface='" DBUS_INTERFACE_LOCAL "'",
361 if (dbus_error_is_set (&error))
364 if (!(dbus_bus_name_has_owner(client->bus, AVAHI_DBUS_NAME, &error)) ||
365 dbus_error_is_set(&error)) {
367 /* We free the error so its not set, that way the fail target
368 * will return the NO_DAEMON error rather than a DBUS error */
369 dbus_error_free (&error);
372 *ret_error = AVAHI_ERR_NO_DAEMON;
377 if (get_server_state(client, ret_error) < 0)
385 avahi_client_free(client);
387 if (dbus_error_is_set(&error)) {
390 *ret_error = avahi_error_dbus_to_number(error.name);
392 dbus_error_free(&error);
398 void avahi_client_free(AvahiClient *client) {
401 while (client->groups)
402 avahi_entry_group_free(client->groups);
404 while (client->domain_browsers)
405 avahi_domain_browser_free(client->domain_browsers);
407 while (client->service_browsers)
408 avahi_service_browser_free(client->service_browsers);
410 while (client->service_type_browsers)
411 avahi_service_type_browser_free(client->service_type_browsers);
413 while (client->service_resolvers)
414 avahi_service_resolver_free(client->service_resolvers);
417 dbus_connection_disconnect(client->bus);
418 dbus_connection_unref(client->bus);
421 avahi_free(client->version_string);
422 avahi_free(client->host_name);
423 avahi_free(client->host_name_fqdn);
424 avahi_free(client->domain_name);
429 static char* avahi_client_get_string_reply_and_block (AvahiClient *client, const char *method, const char *param) {
430 DBusMessage *message = NULL, *reply = NULL;
437 dbus_error_init (&error);
439 if (!(message = dbus_message_new_method_call (AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, method))) {
440 avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
445 if (!dbus_message_append_args (message, DBUS_TYPE_STRING, ¶m, DBUS_TYPE_INVALID)) {
446 avahi_client_set_errno (client, AVAHI_ERR_NO_MEMORY);
451 reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error);
453 if (!reply || dbus_error_is_set (&error))
456 if (!dbus_message_get_args (reply, &error, DBUS_TYPE_STRING, &ret, DBUS_TYPE_INVALID) ||
457 dbus_error_is_set (&error))
460 if (!(n = avahi_strdup(ret))) {
461 avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
465 dbus_message_unref(message);
466 dbus_message_unref(reply);
473 dbus_message_unref(message);
475 dbus_message_unref(reply);
477 if (dbus_error_is_set(&error)) {
478 avahi_client_set_dbus_error(client, &error);
479 dbus_error_free(&error);
485 const char* avahi_client_get_version_string (AvahiClient *client) {
488 if (client->state == AVAHI_CLIENT_DISCONNECTED) {
489 avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
493 if (!client->version_string)
494 client->version_string = avahi_client_get_string_reply_and_block(client, "GetVersionString", NULL);
496 return client->version_string;
499 const char* avahi_client_get_domain_name (AvahiClient *client) {
502 if (client->state == AVAHI_CLIENT_DISCONNECTED) {
503 avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
507 if (!client->domain_name)
508 client->domain_name = avahi_client_get_string_reply_and_block(client, "GetDomainName", NULL);
510 return client->domain_name;
513 const char* avahi_client_get_host_name (AvahiClient *client) {
516 if (client->state == AVAHI_CLIENT_DISCONNECTED) {
517 avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
521 if (!client->host_name)
522 client->host_name = avahi_client_get_string_reply_and_block(client, "GetHostName", NULL);
524 return client->host_name;
527 const char* avahi_client_get_host_name_fqdn (AvahiClient *client) {
530 if (client->state == AVAHI_CLIENT_DISCONNECTED) {
531 avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
535 if (!client->host_name_fqdn)
536 client->host_name_fqdn = avahi_client_get_string_reply_and_block(client, "GetHostNameFqdn", NULL);
538 return client->host_name_fqdn;
541 AvahiClientState avahi_client_get_state(AvahiClient *client) {
544 return client->state;
547 int avahi_client_errno(AvahiClient *client) {
550 return client->error;
553 /* Just for internal use */
554 int avahi_client_simple_method_call(AvahiClient *client, const char *path, const char *interface, const char *method) {
555 DBusMessage *message = NULL, *reply = NULL;
559 dbus_error_init(&error);
566 if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, path, interface, method))) {
567 r = avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
571 if (!(reply = dbus_connection_send_with_reply_and_block(client->bus, message, -1, &error)) ||
572 dbus_error_is_set (&error)) {
573 r = avahi_client_set_errno(client, AVAHI_ERR_DBUS_ERROR);
577 if (!dbus_message_get_args(reply, &error, DBUS_TYPE_INVALID) ||
578 dbus_error_is_set (&error)) {
579 r = avahi_client_set_errno(client, AVAHI_ERR_DBUS_ERROR);
583 dbus_message_unref(message);
584 dbus_message_unref(reply);
589 if (dbus_error_is_set(&error)) {
590 r = avahi_client_set_dbus_error(client, &error);
591 dbus_error_free(&error);
595 dbus_message_unref(message);
598 dbus_message_unref(reply);
603 uint32_t avahi_client_get_local_service_cookie(AvahiClient *client) {
604 DBusMessage *message = NULL, *reply = NULL;
608 if (client->state == AVAHI_CLIENT_DISCONNECTED) {
609 avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
610 return AVAHI_SERVICE_COOKIE_INVALID;
613 if (client->local_service_cookie_valid)
614 return client->local_service_cookie;
616 dbus_error_init (&error);
618 if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "GetLocalServiceCookie"))) {
619 avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
623 reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error);
625 if (!reply || dbus_error_is_set (&error))
628 if (!dbus_message_get_args (reply, &error, DBUS_TYPE_UINT32, &client->local_service_cookie, DBUS_TYPE_INVALID) ||
629 dbus_error_is_set (&error))
632 dbus_message_unref(message);
633 dbus_message_unref(reply);
635 client->local_service_cookie_valid = 1;
636 return client->local_service_cookie;
641 dbus_message_unref(message);
643 dbus_message_unref(reply);
645 if (dbus_error_is_set(&error)) {
646 avahi_client_set_dbus_error(client, &error);
647 dbus_error_free(&error);
650 return AVAHI_SERVICE_COOKIE_INVALID;
653 int avahi_client_is_service_local(AvahiClient *client, AvahiIfIndex interface, AvahiProtocol protocol, const char *name, const char *type, const char *domain) {
654 DBusMessage *message = NULL, *reply = NULL;
656 int32_t i_interface, i_protocol;
664 if (client->state == AVAHI_CLIENT_DISCONNECTED) {
665 avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
666 return AVAHI_SERVICE_COOKIE_INVALID;
669 dbus_error_init (&error);
671 if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "IsServiceLocal"))) {
672 avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
676 i_interface = (int32_t) interface;
677 i_protocol = (int32_t) protocol;
679 if (!dbus_message_append_args(
681 DBUS_TYPE_INT32, &i_interface,
682 DBUS_TYPE_INT32, &i_protocol,
683 DBUS_TYPE_STRING, &name,
684 DBUS_TYPE_STRING, &type,
685 DBUS_TYPE_STRING, &domain,
686 DBUS_TYPE_INVALID)) {
687 avahi_client_set_errno (client, AVAHI_ERR_NO_MEMORY);
691 reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error);
693 if (!reply || dbus_error_is_set (&error))
696 if (!dbus_message_get_args (reply, &error, DBUS_TYPE_BOOLEAN, &b, DBUS_TYPE_INVALID) ||
697 dbus_error_is_set (&error))
700 dbus_message_unref(message);
701 dbus_message_unref(reply);
708 dbus_message_unref(message);
710 dbus_message_unref(reply);
712 if (dbus_error_is_set(&error)) {
713 avahi_client_set_dbus_error(client, &error);
714 dbus_error_free(&error);
717 return AVAHI_SERVICE_COOKIE_INVALID;