| /*** |
| This file is part of avahi. |
| |
| avahi is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as |
| published by the Free Software Foundation; either version 2.1 of the |
| License, or (at your option) any later version. |
| |
| avahi is distributed in the hope that it will be useful, but WITHOUT |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General |
| Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with avahi; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| USA. |
| ***/ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include <dbus/dbus.h> |
| |
| #include <avahi-common/dbus.h> |
| #include <avahi-common/llist.h> |
| #include <avahi-common/error.h> |
| #include <avahi-common/dbus.h> |
| #include <avahi-common/malloc.h> |
| #include <avahi-common/dbus-watch-glue.h> |
| #include <avahi-common/i18n.h> |
| |
| #include "client.h" |
| #include "internal.h" |
| |
| #define AVAHI_CLIENT_DBUS_API_SUPPORTED ((uint32_t) 0x0201) |
| |
| static int init_server(AvahiClient *client, int *ret_error); |
| |
| int avahi_client_set_errno (AvahiClient *client, int error) { |
| assert(client); |
| |
| return client->error = error; |
| } |
| |
| int avahi_client_set_dbus_error(AvahiClient *client, DBusError *error) { |
| assert(client); |
| assert(error); |
| |
| return avahi_client_set_errno(client, avahi_error_dbus_to_number(error->name)); |
| } |
| |
| static void client_set_state(AvahiClient *client, AvahiClientState state) { |
| assert(client); |
| |
| if (client->state == state) |
| return; |
| |
| client->state = state; |
| |
| switch (client->state) { |
| case AVAHI_CLIENT_FAILURE: |
| if (client->bus) { |
| #ifdef HAVE_DBUS_CONNECTION_CLOSE |
| dbus_connection_close(client->bus); |
| #else |
| dbus_connection_disconnect(client->bus); |
| #endif |
| dbus_connection_unref(client->bus); |
| client->bus = NULL; |
| } |
| |
| /* Fall through */ |
| |
| case AVAHI_CLIENT_S_COLLISION: |
| case AVAHI_CLIENT_S_REGISTERING: |
| |
| /* Clear cached strings */ |
| avahi_free(client->host_name); |
| avahi_free(client->host_name_fqdn); |
| avahi_free(client->domain_name); |
| |
| client->host_name = NULL; |
| client->host_name_fqdn = NULL; |
| client->domain_name = NULL; |
| break; |
| |
| case AVAHI_CLIENT_S_RUNNING: |
| case AVAHI_CLIENT_CONNECTING: |
| break; |
| |
| } |
| |
| if (client->callback) |
| client->callback (client, state, client->userdata); |
| } |
| |
| static DBusHandlerResult filter_func(DBusConnection *bus, DBusMessage *message, void *userdata) { |
| AvahiClient *client = userdata; |
| DBusError error; |
| |
| assert(bus); |
| assert(message); |
| |
| dbus_error_init(&error); |
| |
| /* fprintf(stderr, "dbus: interface=%s, path=%s, member=%s\n", */ |
| /* dbus_message_get_interface (message), */ |
| /* dbus_message_get_path (message), */ |
| /* dbus_message_get_member (message)); */ |
| |
| if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) { |
| |
| /* The DBUS server died or kicked us */ |
| avahi_client_set_errno(client, AVAHI_ERR_DISCONNECTED); |
| goto fail; |
| |
| } else if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameAcquired")) { |
| |
| /* Ignore this message */ |
| |
| } else if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameOwnerChanged")) { |
| char *name, *old, *new; |
| |
| if (!dbus_message_get_args( |
| message, &error, |
| DBUS_TYPE_STRING, &name, |
| DBUS_TYPE_STRING, &old, |
| DBUS_TYPE_STRING, &new, |
| DBUS_TYPE_INVALID) || dbus_error_is_set(&error)) { |
| |
| fprintf(stderr, "WARNING: Failed to parse NameOwnerChanged signal: %s\n", error.message); |
| avahi_client_set_errno(client, AVAHI_ERR_DBUS_ERROR); |
| goto fail; |
| } |
| |
| if (strcmp(name, AVAHI_DBUS_NAME) == 0) { |
| |
| if (old[0] && |
| avahi_client_is_connected(client)) { |
| |
| /* Regardless if the server lost its name or |
| * if the name was transfered: our services are no longer |
| * available, so we disconnect ourselves */ |
| avahi_client_set_errno(client, AVAHI_ERR_DISCONNECTED); |
| goto fail; |
| |
| } else if (client->state == AVAHI_CLIENT_CONNECTING && (!old || *old == 0)) { |
| int ret; |
| |
| /* Server appeared */ |
| |
| if ((ret = init_server(client, NULL)) < 0) { |
| avahi_client_set_errno(client, ret); |
| goto fail; |
| } |
| } |
| } |
| |
| } else if (!avahi_client_is_connected(client)) { |
| |
| /* Ignore messages we get in unconnected state */ |
| |
| } else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_SERVER, "StateChanged")) { |
| int32_t state; |
| char *e = NULL; |
| int c; |
| |
| if (!dbus_message_get_args( |
| message, &error, |
| DBUS_TYPE_INT32, &state, |
| DBUS_TYPE_STRING, &e, |
| DBUS_TYPE_INVALID) || dbus_error_is_set (&error)) { |
| |
| fprintf(stderr, "WARNING: Failed to parse Server.StateChanged signal: %s\n", error.message); |
| avahi_client_set_errno(client, AVAHI_ERR_DBUS_ERROR); |
| goto fail; |
| } |
| |
| if ((c = avahi_error_dbus_to_number(e)) != AVAHI_OK) |
| avahi_client_set_errno(client, c); |
| |
| client_set_state(client, (AvahiClientState) state); |
| |
| } else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_ENTRY_GROUP, "StateChanged")) { |
| const char *path; |
| AvahiEntryGroup *g; |
| path = dbus_message_get_path(message); |
| |
| for (g = client->groups; g; g = g->groups_next) |
| if (strcmp(g->path, path) == 0) |
| break; |
| |
| if (g) { |
| int32_t state; |
| char *e; |
| int c; |
| |
| if (!dbus_message_get_args( |
| message, &error, |
| DBUS_TYPE_INT32, &state, |
| DBUS_TYPE_STRING, &e, |
| DBUS_TYPE_INVALID) || |
| dbus_error_is_set(&error)) { |
| |
| fprintf(stderr, "WARNING: Failed to parse EntryGroup.StateChanged signal: %s\n", error.message); |
| avahi_client_set_errno(client, AVAHI_ERR_DBUS_ERROR); |
| goto fail; |
| } |
| |
| if ((c = avahi_error_dbus_to_number(e)) != AVAHI_OK) |
| avahi_client_set_errno(client, c); |
| |
| avahi_entry_group_set_state(g, state); |
| } |
| |
| } else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_DOMAIN_BROWSER, "ItemNew")) |
| return avahi_domain_browser_event(client, AVAHI_BROWSER_NEW, message); |
| else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_DOMAIN_BROWSER, "ItemRemove")) |
| return avahi_domain_browser_event(client, AVAHI_BROWSER_REMOVE, message); |
| else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_DOMAIN_BROWSER, "CacheExhausted")) |
| return avahi_domain_browser_event(client, AVAHI_BROWSER_CACHE_EXHAUSTED, message); |
| else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_DOMAIN_BROWSER, "AllForNow")) |
| return avahi_domain_browser_event(client, AVAHI_BROWSER_ALL_FOR_NOW, message); |
| else if (dbus_message_is_signal (message, AVAHI_DBUS_INTERFACE_DOMAIN_BROWSER, "Failure")) |
| return avahi_domain_browser_event(client, AVAHI_BROWSER_FAILURE, message); |
| |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_TYPE_BROWSER, "ItemNew")) |
| return avahi_service_type_browser_event (client, AVAHI_BROWSER_NEW, message); |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_TYPE_BROWSER, "ItemRemove")) |
| return avahi_service_type_browser_event (client, AVAHI_BROWSER_REMOVE, message); |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_TYPE_BROWSER, "CacheExhausted")) |
| return avahi_service_type_browser_event (client, AVAHI_BROWSER_CACHE_EXHAUSTED, message); |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_TYPE_BROWSER, "AllForNow")) |
| return avahi_service_type_browser_event (client, AVAHI_BROWSER_ALL_FOR_NOW, message); |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_TYPE_BROWSER, "Failure")) |
| return avahi_service_type_browser_event (client, AVAHI_BROWSER_FAILURE, message); |
| |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "ItemNew")) |
| return avahi_service_browser_event (client, AVAHI_BROWSER_NEW, message); |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "ItemRemove")) |
| return avahi_service_browser_event (client, AVAHI_BROWSER_REMOVE, message); |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "CacheExhausted")) |
| return avahi_service_browser_event (client, AVAHI_BROWSER_CACHE_EXHAUSTED, message); |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "AllForNow")) |
| return avahi_service_browser_event (client, AVAHI_BROWSER_ALL_FOR_NOW, message); |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "Failure")) |
| return avahi_service_browser_event (client, AVAHI_BROWSER_FAILURE, message); |
| |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_RESOLVER, "Found")) |
| return avahi_service_resolver_event (client, AVAHI_RESOLVER_FOUND, message); |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_SERVICE_RESOLVER, "Failure")) |
| return avahi_service_resolver_event (client, AVAHI_RESOLVER_FAILURE, message); |
| |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_HOST_NAME_RESOLVER, "Found")) |
| return avahi_host_name_resolver_event (client, AVAHI_RESOLVER_FOUND, message); |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_HOST_NAME_RESOLVER, "Failure")) |
| return avahi_host_name_resolver_event (client, AVAHI_RESOLVER_FAILURE, message); |
| |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_ADDRESS_RESOLVER, "Found")) |
| return avahi_address_resolver_event (client, AVAHI_RESOLVER_FOUND, message); |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_ADDRESS_RESOLVER, "Failure")) |
| return avahi_address_resolver_event (client, AVAHI_RESOLVER_FAILURE, message); |
| |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_RECORD_BROWSER, "ItemNew")) |
| return avahi_record_browser_event (client, AVAHI_BROWSER_NEW, message); |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_RECORD_BROWSER, "ItemRemove")) |
| return avahi_record_browser_event (client, AVAHI_BROWSER_REMOVE, message); |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_RECORD_BROWSER, "CacheExhausted")) |
| return avahi_record_browser_event (client, AVAHI_BROWSER_CACHE_EXHAUSTED, message); |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_RECORD_BROWSER, "AllForNow")) |
| return avahi_record_browser_event (client, AVAHI_BROWSER_ALL_FOR_NOW, message); |
| else if (dbus_message_is_signal(message, AVAHI_DBUS_INTERFACE_RECORD_BROWSER, "Failure")) |
| return avahi_record_browser_event (client, AVAHI_BROWSER_FAILURE, message); |
| |
| else { |
| |
| fprintf(stderr, "WARNING: Unhandled message: interface=%s, path=%s, member=%s\n", |
| dbus_message_get_interface(message), |
| dbus_message_get_path(message), |
| dbus_message_get_member(message)); |
| |
| return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; |
| } |
| |
| return DBUS_HANDLER_RESULT_HANDLED; |
| |
| fail: |
| |
| if (dbus_error_is_set(&error)) { |
| avahi_client_set_errno(client, avahi_error_dbus_to_number(error.name)); |
| dbus_error_free(&error); |
| } |
| |
| client_set_state(client, AVAHI_CLIENT_FAILURE); |
| |
| return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; |
| } |
| |
| static int get_server_state(AvahiClient *client, int *ret_error) { |
| DBusMessage *message = NULL, *reply = NULL; |
| DBusError error; |
| int32_t state; |
| int e = AVAHI_ERR_NO_MEMORY; |
| |
| assert(client); |
| |
| dbus_error_init(&error); |
| |
| if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "GetState"))) |
| goto fail; |
| |
| reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error); |
| |
| if (!reply || dbus_error_is_set (&error)) |
| goto fail; |
| |
| if (!dbus_message_get_args(reply, &error, DBUS_TYPE_INT32, &state, DBUS_TYPE_INVALID) || |
| dbus_error_is_set (&error)) |
| goto fail; |
| |
| client_set_state(client, (AvahiClientState) state); |
| |
| dbus_message_unref(message); |
| dbus_message_unref(reply); |
| |
| return AVAHI_OK; |
| |
| fail: |
| if (dbus_error_is_set(&error)) { |
| e = avahi_error_dbus_to_number (error.name); |
| dbus_error_free(&error); |
| } |
| |
| if (ret_error) |
| *ret_error = e; |
| |
| if (message) |
| dbus_message_unref(message); |
| if (reply) |
| dbus_message_unref(reply); |
| |
| return e; |
| } |
| |
| static int check_version(AvahiClient *client, int *ret_error) { |
| DBusMessage *message = NULL, *reply = NULL; |
| DBusError error; |
| uint32_t version; |
| int e = AVAHI_ERR_NO_MEMORY; |
| |
| assert(client); |
| |
| dbus_error_init(&error); |
| |
| if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "GetAPIVersion"))) |
| goto fail; |
| |
| reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error); |
| |
| if (!reply || dbus_error_is_set (&error)) { |
| char *version_str; |
| |
| if (!dbus_error_is_set(&error) || strcmp(error.name, DBUS_ERROR_UNKNOWN_METHOD)) |
| goto fail; |
| |
| /* If the method GetAPIVersion is not known, we look if |
| * GetVersionString matches "avahi 0.6" which is the only |
| * version we support which doesn't have GetAPIVersion() .*/ |
| |
| dbus_message_unref(message); |
| if (reply) dbus_message_unref(reply); |
| dbus_error_free(&error); |
| |
| if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "GetVersionString"))) |
| goto fail; |
| |
| reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error); |
| |
| if (!reply || dbus_error_is_set (&error)) |
| goto fail; |
| |
| if (!dbus_message_get_args (reply, &error, DBUS_TYPE_STRING, &version_str, DBUS_TYPE_INVALID) || |
| dbus_error_is_set (&error)) |
| goto fail; |
| |
| version = strcmp(version_str, "avahi 0.6") == 0 ? 0x0201 : 0x0000; |
| |
| } else { |
| |
| if (!dbus_message_get_args (reply, &error, DBUS_TYPE_UINT32, &version, DBUS_TYPE_INVALID) || |
| dbus_error_is_set(&error)) |
| goto fail; |
| } |
| |
| /*fprintf(stderr, "API Version 0x%04x\n", version);*/ |
| |
| if ((version & 0xFF00) != (AVAHI_CLIENT_DBUS_API_SUPPORTED & 0xFF00) || |
| (version & 0x00FF) < (AVAHI_CLIENT_DBUS_API_SUPPORTED & 0x00FF)) { |
| e = AVAHI_ERR_VERSION_MISMATCH; |
| goto fail; |
| } |
| |
| dbus_message_unref(message); |
| dbus_message_unref(reply); |
| |
| return AVAHI_OK; |
| |
| fail: |
| if (dbus_error_is_set(&error)) { |
| e = avahi_error_dbus_to_number (error.name); |
| dbus_error_free(&error); |
| } |
| |
| if (ret_error) |
| *ret_error = e; |
| |
| if (message) |
| dbus_message_unref(message); |
| if (reply) |
| dbus_message_unref(reply); |
| |
| return e; |
| } |
| |
| static int init_server(AvahiClient *client, int *ret_error) { |
| int r; |
| |
| if ((r = check_version(client, ret_error)) < 0) |
| return r; |
| |
| if ((r = get_server_state(client, ret_error)) < 0) |
| return r; |
| |
| return AVAHI_OK; |
| } |
| |
| /* This function acts like dbus_bus_get but creates a private |
| * connection instead. */ |
| static DBusConnection* avahi_dbus_bus_get(DBusError *error) { |
| DBusConnection *c; |
| |
| #ifdef HAVE_DBUS_BUS_GET_PRIVATE |
| if (!(c = dbus_bus_get_private(DBUS_BUS_SYSTEM, error))) |
| return NULL; |
| |
| dbus_connection_set_exit_on_disconnect(c, FALSE); |
| #else |
| const char *a; |
| |
| if (!(a = getenv("DBUS_SYSTEM_BUS_ADDRESS")) || !*a) |
| a = DBUS_SYSTEM_BUS_DEFAULT_ADDRESS; |
| |
| if (!(c = dbus_connection_open_private(a, error))) |
| return NULL; |
| |
| dbus_connection_set_exit_on_disconnect(c, FALSE); |
| |
| if (!dbus_bus_register(c, error)) { |
| #ifdef HAVE_DBUS_CONNECTION_CLOSE |
| dbus_connection_close(c); |
| #else |
| dbus_connection_disconnect(c); |
| #endif |
| dbus_connection_unref(c); |
| return NULL; |
| } |
| #endif |
| |
| return c; |
| } |
| |
| AvahiClient *avahi_client_new(const AvahiPoll *poll_api, AvahiClientFlags flags, AvahiClientCallback callback, void *userdata, int *ret_error) { |
| AvahiClient *client = NULL; |
| DBusError error; |
| DBusMessage *message = NULL, *reply = NULL; |
| |
| avahi_init_i18n(); |
| |
| dbus_error_init(&error); |
| |
| if (!(client = avahi_new(AvahiClient, 1))) { |
| if (ret_error) |
| *ret_error = AVAHI_ERR_NO_MEMORY; |
| goto fail; |
| } |
| |
| client->poll_api = poll_api; |
| client->error = AVAHI_OK; |
| client->callback = callback; |
| client->userdata = userdata; |
| client->state = (AvahiClientState) -1; |
| client->flags = flags; |
| |
| client->host_name = NULL; |
| client->host_name_fqdn = NULL; |
| client->domain_name = NULL; |
| client->version_string = NULL; |
| client->local_service_cookie_valid = 0; |
| |
| AVAHI_LLIST_HEAD_INIT(AvahiEntryGroup, client->groups); |
| AVAHI_LLIST_HEAD_INIT(AvahiDomainBrowser, client->domain_browsers); |
| AVAHI_LLIST_HEAD_INIT(AvahiServiceBrowser, client->service_browsers); |
| AVAHI_LLIST_HEAD_INIT(AvahiServiceTypeBrowser, client->service_type_browsers); |
| AVAHI_LLIST_HEAD_INIT(AvahiServiceResolver, client->service_resolvers); |
| AVAHI_LLIST_HEAD_INIT(AvahiHostNameResolver, client->host_name_resolvers); |
| AVAHI_LLIST_HEAD_INIT(AvahiAddressResolver, client->address_resolvers); |
| AVAHI_LLIST_HEAD_INIT(AvahiRecordBrowser, client->record_browsers); |
| |
| if (!(client->bus = avahi_dbus_bus_get(&error)) || dbus_error_is_set(&error)) { |
| if (ret_error) |
| *ret_error = AVAHI_ERR_DBUS_ERROR; |
| goto fail; |
| } |
| |
| if (avahi_dbus_connection_glue(client->bus, poll_api) < 0) { |
| if (ret_error) |
| *ret_error = AVAHI_ERR_NO_MEMORY; /* Not optimal */ |
| goto fail; |
| } |
| |
| if (!dbus_connection_add_filter(client->bus, filter_func, client, NULL)) { |
| if (ret_error) |
| *ret_error = AVAHI_ERR_NO_MEMORY; |
| goto fail; |
| } |
| |
| dbus_bus_add_match( |
| client->bus, |
| "type='signal', " |
| "interface='" AVAHI_DBUS_INTERFACE_SERVER "', " |
| "sender='" AVAHI_DBUS_NAME "', " |
| "path='" AVAHI_DBUS_PATH_SERVER "'", |
| &error); |
| |
| if (dbus_error_is_set(&error)) |
| goto fail; |
| |
| dbus_bus_add_match ( |
| client->bus, |
| "type='signal', " |
| "interface='" DBUS_INTERFACE_DBUS "', " |
| "sender='" DBUS_SERVICE_DBUS "', " |
| "path='" DBUS_PATH_DBUS "'", |
| &error); |
| |
| if (dbus_error_is_set(&error)) |
| goto fail; |
| |
| dbus_bus_add_match( |
| client->bus, |
| "type='signal', " |
| "interface='" DBUS_INTERFACE_LOCAL "'", |
| &error); |
| |
| if (dbus_error_is_set(&error)) |
| goto fail; |
| |
| if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, "org.freedesktop.DBus.Peer", "Ping"))) |
| goto fail; |
| |
| reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error); |
| |
| if (!reply || dbus_error_is_set (&error)) { |
| /* We free the error so its not set, that way the fail target |
| * will return the NO_DAEMON error rather than a DBUS error */ |
| dbus_error_free(&error); |
| |
| if (!(flags & AVAHI_CLIENT_NO_FAIL)) { |
| |
| if (ret_error) |
| *ret_error = AVAHI_ERR_NO_DAEMON; |
| |
| goto fail; |
| } |
| |
| /* The user doesn't want this call to fail if the daemon is not |
| * available, so let's return succesfully */ |
| client_set_state(client, AVAHI_CLIENT_CONNECTING); |
| |
| } else { |
| |
| if (init_server(client, ret_error) < 0) |
| goto fail; |
| } |
| |
| dbus_message_unref(message); |
| |
| if (reply) |
| dbus_message_unref(reply); |
| |
| return client; |
| |
| fail: |
| |
| if (message) |
| dbus_message_unref(message); |
| if (reply) |
| dbus_message_unref(reply); |
| |
| if (client) |
| avahi_client_free(client); |
| |
| if (dbus_error_is_set(&error)) { |
| |
| if (ret_error) { |
| if (strcmp(error.name, DBUS_ERROR_FILE_NOT_FOUND) == 0) |
| /* DBUS returns this error when the DBUS daemon is not running */ |
| *ret_error = AVAHI_ERR_NO_DAEMON; |
| else |
| *ret_error = avahi_error_dbus_to_number(error.name); |
| } |
| |
| dbus_error_free(&error); |
| } |
| |
| return NULL; |
| } |
| |
| void avahi_client_free(AvahiClient *client) { |
| assert(client); |
| |
| if (client->bus) |
| /* Disconnect in advance, so that the free() functions won't |
| * issue needless server calls */ |
| #ifdef HAVE_DBUS_CONNECTION_CLOSE |
| dbus_connection_close(client->bus); |
| #else |
| dbus_connection_disconnect(client->bus); |
| #endif |
| |
| while (client->groups) |
| avahi_entry_group_free(client->groups); |
| |
| while (client->domain_browsers) |
| avahi_domain_browser_free(client->domain_browsers); |
| |
| while (client->service_browsers) |
| avahi_service_browser_free(client->service_browsers); |
| |
| while (client->service_type_browsers) |
| avahi_service_type_browser_free(client->service_type_browsers); |
| |
| while (client->service_resolvers) |
| avahi_service_resolver_free(client->service_resolvers); |
| |
| while (client->host_name_resolvers) |
| avahi_host_name_resolver_free(client->host_name_resolvers); |
| |
| while (client->address_resolvers) |
| avahi_address_resolver_free(client->address_resolvers); |
| |
| while (client->record_browsers) |
| avahi_record_browser_free(client->record_browsers); |
| |
| if (client->bus) |
| dbus_connection_unref(client->bus); |
| |
| avahi_free(client->version_string); |
| avahi_free(client->host_name); |
| avahi_free(client->host_name_fqdn); |
| avahi_free(client->domain_name); |
| |
| avahi_free(client); |
| } |
| |
| static char* avahi_client_get_string_reply_and_block (AvahiClient *client, const char *method, const char *param) { |
| DBusMessage *message = NULL, *reply = NULL; |
| DBusError error; |
| char *ret, *n; |
| |
| assert(client); |
| assert(method); |
| |
| dbus_error_init (&error); |
| |
| if (!(message = dbus_message_new_method_call (AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, method))) { |
| avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY); |
| goto fail; |
| } |
| |
| if (param) { |
| if (!dbus_message_append_args (message, DBUS_TYPE_STRING, ¶m, DBUS_TYPE_INVALID)) { |
| avahi_client_set_errno (client, AVAHI_ERR_NO_MEMORY); |
| goto fail; |
| } |
| } |
| |
| reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error); |
| |
| if (!reply || dbus_error_is_set (&error)) |
| goto fail; |
| |
| if (!dbus_message_get_args (reply, &error, DBUS_TYPE_STRING, &ret, DBUS_TYPE_INVALID) || |
| dbus_error_is_set (&error)) |
| goto fail; |
| |
| if (!(n = avahi_strdup(ret))) { |
| avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY); |
| goto fail; |
| } |
| |
| dbus_message_unref(message); |
| dbus_message_unref(reply); |
| |
| return n; |
| |
| fail: |
| |
| if (message) |
| dbus_message_unref(message); |
| if (reply) |
| dbus_message_unref(reply); |
| |
| if (dbus_error_is_set(&error)) { |
| avahi_client_set_dbus_error(client, &error); |
| dbus_error_free(&error); |
| } |
| |
| return NULL; |
| } |
| |
| const char* avahi_client_get_version_string(AvahiClient *client) { |
| assert(client); |
| |
| if (!avahi_client_is_connected(client)) { |
| avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE); |
| return NULL; |
| } |
| |
| if (!client->version_string) |
| client->version_string = avahi_client_get_string_reply_and_block(client, "GetVersionString", NULL); |
| |
| return client->version_string; |
| } |
| |
| const char* avahi_client_get_domain_name(AvahiClient *client) { |
| assert(client); |
| |
| if (!avahi_client_is_connected(client)) { |
| avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE); |
| return NULL; |
| } |
| |
| if (!client->domain_name) |
| client->domain_name = avahi_client_get_string_reply_and_block(client, "GetDomainName", NULL); |
| |
| return client->domain_name; |
| } |
| |
| const char* avahi_client_get_host_name(AvahiClient *client) { |
| assert(client); |
| |
| if (!avahi_client_is_connected(client)) { |
| avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE); |
| return NULL; |
| } |
| |
| if (!client->host_name) |
| client->host_name = avahi_client_get_string_reply_and_block(client, "GetHostName", NULL); |
| |
| return client->host_name; |
| } |
| |
| const char* avahi_client_get_host_name_fqdn (AvahiClient *client) { |
| assert(client); |
| |
| if (!avahi_client_is_connected(client)) { |
| avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE); |
| return NULL; |
| } |
| |
| if (!client->host_name_fqdn) |
| client->host_name_fqdn = avahi_client_get_string_reply_and_block(client, "GetHostNameFqdn", NULL); |
| |
| return client->host_name_fqdn; |
| } |
| |
| AvahiClientState avahi_client_get_state(AvahiClient *client) { |
| assert(client); |
| |
| return client->state; |
| } |
| |
| int avahi_client_errno(AvahiClient *client) { |
| assert(client); |
| |
| return client->error; |
| } |
| |
| /* Just for internal use */ |
| int avahi_client_simple_method_call(AvahiClient *client, const char *path, const char *interface, const char *method) { |
| DBusMessage *message = NULL, *reply = NULL; |
| DBusError error; |
| int r = AVAHI_OK; |
| |
| dbus_error_init(&error); |
| |
| assert(client); |
| assert(path); |
| assert(interface); |
| assert(method); |
| |
| if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, path, interface, method))) { |
| r = avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY); |
| goto fail; |
| } |
| |
| if (!(reply = dbus_connection_send_with_reply_and_block(client->bus, message, -1, &error)) || |
| dbus_error_is_set (&error)) { |
| r = avahi_client_set_errno(client, AVAHI_ERR_DBUS_ERROR); |
| goto fail; |
| } |
| |
| if (!dbus_message_get_args(reply, &error, DBUS_TYPE_INVALID) || |
| dbus_error_is_set (&error)) { |
| r = avahi_client_set_errno(client, AVAHI_ERR_DBUS_ERROR); |
| goto fail; |
| } |
| |
| dbus_message_unref(message); |
| dbus_message_unref(reply); |
| |
| return AVAHI_OK; |
| |
| fail: |
| if (dbus_error_is_set(&error)) { |
| r = avahi_client_set_dbus_error(client, &error); |
| dbus_error_free(&error); |
| } |
| |
| if (message) |
| dbus_message_unref(message); |
| |
| if (reply) |
| dbus_message_unref(reply); |
| |
| return r; |
| } |
| |
| uint32_t avahi_client_get_local_service_cookie(AvahiClient *client) { |
| DBusMessage *message = NULL, *reply = NULL; |
| DBusError error; |
| assert(client); |
| |
| if (!avahi_client_is_connected(client)) { |
| avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE); |
| return AVAHI_SERVICE_COOKIE_INVALID; |
| } |
| |
| if (client->local_service_cookie_valid) |
| return client->local_service_cookie; |
| |
| dbus_error_init (&error); |
| |
| if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "GetLocalServiceCookie"))) { |
| avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY); |
| goto fail; |
| } |
| |
| reply = dbus_connection_send_with_reply_and_block (client->bus, message, -1, &error); |
| |
| if (!reply || dbus_error_is_set (&error)) |
| goto fail; |
| |
| if (!dbus_message_get_args (reply, &error, DBUS_TYPE_UINT32, &client->local_service_cookie, DBUS_TYPE_INVALID) || |
| dbus_error_is_set (&error)) |
| goto fail; |
| |
| dbus_message_unref(message); |
| dbus_message_unref(reply); |
| |
| client->local_service_cookie_valid = 1; |
| return client->local_service_cookie; |
| |
| fail: |
| |
| if (message) |
| dbus_message_unref(message); |
| if (reply) |
| dbus_message_unref(reply); |
| |
| if (dbus_error_is_set(&error)) { |
| avahi_client_set_dbus_error(client, &error); |
| dbus_error_free(&error); |
| } |
| |
| return AVAHI_SERVICE_COOKIE_INVALID; |
| } |
| |
| int avahi_client_is_connected(AvahiClient *client) { |
| assert(client); |
| |
| return |
| client->bus && |
| dbus_connection_get_is_connected(client->bus) && |
| (client->state == AVAHI_CLIENT_S_RUNNING || client->state == AVAHI_CLIENT_S_REGISTERING || client->state == AVAHI_CLIENT_S_COLLISION); |
| } |
| |
| int avahi_client_set_host_name(AvahiClient* client, const char *name) { |
| DBusMessage *message = NULL, *reply = NULL; |
| DBusError error; |
| |
| assert(client); |
| |
| if (!avahi_client_is_connected(client)) |
| return avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE); |
| |
| dbus_error_init (&error); |
| |
| if (!(message = dbus_message_new_method_call (AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "SetHostName"))) { |
| avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY); |
| goto fail; |
| } |
| |
| if (!dbus_message_append_args (message, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID)) { |
| avahi_client_set_errno (client, AVAHI_ERR_NO_MEMORY); |
| goto fail; |
| } |
| |
| reply = dbus_connection_send_with_reply_and_block(client->bus, message, -1, &error); |
| |
| if (!reply || dbus_error_is_set (&error)) |
| goto fail; |
| |
| if (!dbus_message_get_args(reply, &error, DBUS_TYPE_INVALID) || |
| dbus_error_is_set (&error)) |
| goto fail; |
| |
| dbus_message_unref(message); |
| dbus_message_unref(reply); |
| |
| avahi_free(client->host_name); |
| client->host_name = NULL; |
| avahi_free(client->host_name_fqdn); |
| client->host_name_fqdn = NULL; |
| |
| return 0; |
| |
| fail: |
| |
| if (message) |
| dbus_message_unref(message); |
| if (reply) |
| dbus_message_unref(reply); |
| |
| if (dbus_error_is_set(&error)) { |
| avahi_client_set_dbus_error(client, &error); |
| dbus_error_free(&error); |
| } |
| |
| return client->error; |
| } |
