/***
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/avahi-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;
}