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daemon: Implement the DBus server lookup service.
This commit is contained in:
Tanu Kaskinen
parent
c94e7421aa
commit
5babbaafb2
10 changed files with 490 additions and 37 deletions
277
src/daemon/server-lookup.c
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277
src/daemon/server-lookup.c
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/***
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This file is part of PulseAudio.
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Copyright 2009 Tanu Kaskinen
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <dbus/dbus.h>
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#include <pulse/client-conf.h>
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#include <pulse/xmalloc.h>
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#include <pulsecore/core-util.h>
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#include <pulsecore/dbus-shared.h>
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#include <pulsecore/macro.h>
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#include "server-lookup.h"
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struct pa_dbusobj_server_lookup {
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pa_dbus_connection *conn;
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pa_bool_t path_registered;
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pa_daemon_conf_server_type_t server_type;
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};
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static const char introspection[] =
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DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
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"<node>"
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" <!-- If you are looking for documentation make sure to check out\n"
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" http://pulseaudio.org/wiki/DBusInterface -->\n"
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" <interface name=\"org.pulseaudio.ServerLookup\">"
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" <method name=\"GetDBusServers\">"
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" <arg name=\"result\" type=\"s\" direction=\"out\"/>"
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" </method>"
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" </interface>"
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" <interface name=\"org.freedesktop.DBus.Introspectable\">"
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" <method name=\"Introspect\">"
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" <arg name=\"data\" type=\"s\" direction=\"out\"/>"
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" </method>"
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" </interface>"
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"</node>";
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static void unregister_cb(DBusConnection *conn, void *user_data) {
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pa_dbusobj_server_lookup *sl = user_data;
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pa_assert(sl);
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pa_assert(sl->path_registered);
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sl->path_registered = FALSE;
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}
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static DBusHandlerResult handle_introspect(DBusConnection *conn, DBusMessage *msg, pa_dbusobj_server_lookup *sl) {
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const char *i = introspection;
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DBusMessage *reply = NULL;
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pa_assert(conn);
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pa_assert(msg);
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if (!(reply = dbus_message_new_method_return(msg)))
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goto fail;
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if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &i, DBUS_TYPE_INVALID))
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goto fail;
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if (!dbus_connection_send(conn, reply, NULL))
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goto oom;
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dbus_message_unref(reply);
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return DBUS_HANDLER_RESULT_HANDLED;
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fail:
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if (reply)
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dbus_message_unref(reply);
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return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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oom:
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if (reply)
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dbus_message_unref(reply);
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return DBUS_HANDLER_RESULT_NEED_MEMORY;
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}
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/* Caller frees the string. */
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static char *get_dbus_server_from_type(pa_daemon_conf_server_type_t server_type) {
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char *server_string = NULL;
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char *runtime_dir = NULL;
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switch (server_type) {
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case PA_SERVER_TYPE_USER:
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runtime_dir = pa_get_runtime_dir();
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if (!runtime_dir)
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return NULL;
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server_string = pa_sprintf_malloc("unix:path=%s/dbus_socket", runtime_dir);
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break;
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case PA_SERVER_TYPE_SYSTEM:
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server_string = pa_xstrdup("unix:path=/var/run/pulse/dbus_socket");
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break;
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case PA_SERVER_TYPE_NONE:
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server_string = pa_xnew0(char, 1);
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break;
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default:
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pa_assert_not_reached();
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}
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return server_string;
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}
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static DBusHandlerResult handle_get_dbus_servers(DBusConnection *conn, DBusMessage *msg, pa_dbusobj_server_lookup *sl) {
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DBusMessage *reply = NULL;
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pa_client_conf *conf = NULL;
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char *server_string = NULL;
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pa_assert(conn);
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pa_assert(msg);
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pa_assert(sl);
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conf = pa_client_conf_new();
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if (pa_client_conf_load(conf, NULL) < 0) {
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if (!(reply = dbus_message_new_error(msg, "org.pulseaudio.ClientConfLoadError", "Failed to load client.conf.")))
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goto fail;
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if (!dbus_connection_send(conn, reply, NULL))
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goto oom;
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return DBUS_HANDLER_RESULT_HANDLED;
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}
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server_string = pa_xstrdup(conf->default_dbus_server);
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pa_client_conf_free(conf);
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if (!server_string) {
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if (!(server_string = get_dbus_server_from_type(sl->server_type))) {
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if (!(reply = dbus_message_new_error(msg, DBUS_ERROR_FAILED, "get_dbus_server_from_type() failed.")))
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goto fail;
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if (!dbus_connection_send(conn, reply, NULL))
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goto oom;
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return DBUS_HANDLER_RESULT_HANDLED;
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}
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}
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if (!(reply = dbus_message_new_method_return(msg)))
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goto oom;
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if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &server_string, DBUS_TYPE_INVALID))
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goto fail;
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if (!dbus_connection_send(conn, reply, NULL))
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goto oom;
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pa_log("Sent reply with server_string '%s'.", server_string);
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pa_xfree(server_string);
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dbus_message_unref(reply);
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return DBUS_HANDLER_RESULT_HANDLED;
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fail:
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if (conf)
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pa_client_conf_free(conf);
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pa_xfree(server_string);
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if (reply)
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dbus_message_unref(reply);
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return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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oom:
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if (conf)
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pa_client_conf_free(conf);
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pa_xfree(server_string);
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if (reply)
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dbus_message_unref(reply);
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return DBUS_HANDLER_RESULT_NEED_MEMORY;
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}
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static DBusHandlerResult message_cb(DBusConnection *conn, DBusMessage *msg, void *user_data) {
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pa_dbusobj_server_lookup *sl = user_data;
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pa_assert(conn);
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pa_assert(msg);
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pa_assert(sl);
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/* pa_log("Got message! type = %s path = %s iface = %s member = %s dest = %s", dbus_message_type_to_string(dbus_message_get_type(msg)), dbus_message_get_path(msg), dbus_message_get_interface(msg), dbus_message_get_member(msg), dbus_message_get_destination(msg)); */
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if (dbus_message_is_method_call(msg, "org.freedesktop.DBus.Introspectable", "Introspect"))
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return handle_introspect(conn, msg, sl);
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if (dbus_message_is_method_call(msg, "org.pulseaudio.ServerLookup", "GetDBusServers"))
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return handle_get_dbus_servers(conn, msg, sl);
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return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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}
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static DBusObjectPathVTable vtable = {
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.unregister_function = unregister_cb,
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.message_function = message_cb,
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.dbus_internal_pad1 = NULL,
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.dbus_internal_pad2 = NULL,
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.dbus_internal_pad3 = NULL,
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.dbus_internal_pad4 = NULL
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};
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pa_dbusobj_server_lookup *pa_dbusobj_server_lookup_new(pa_core *c, pa_daemon_conf_server_type_t server_type) {
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pa_dbusobj_server_lookup *sl;
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DBusError error;
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dbus_error_init(&error);
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sl = pa_xnew(pa_dbusobj_server_lookup, 1);
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sl->path_registered = FALSE;
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sl->server_type = server_type;
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if (!(sl->conn = pa_dbus_bus_get(c, DBUS_BUS_SESSION, &error)) || dbus_error_is_set(&error)) {
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pa_log("Unable to contact D-Bus: %s: %s", error.name, error.message);
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goto fail;
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}
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if (!dbus_connection_register_object_path(pa_dbus_connection_get(sl->conn), "/org/pulseaudio/server_lookup", &vtable, sl)) {
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pa_log("dbus_connection_register_object_path() failed for /org/pulseaudio/server_lookup.");
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goto fail;
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}
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sl->path_registered = TRUE;
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return sl;
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fail:
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dbus_error_free(&error);
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pa_dbusobj_server_lookup_free(sl);
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return NULL;
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}
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void pa_dbusobj_server_lookup_free(pa_dbusobj_server_lookup *sl) {
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pa_assert(sl);
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if (sl->path_registered) {
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pa_assert(sl->conn);
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if (!dbus_connection_unregister_object_path(pa_dbus_connection_get(sl->conn), "/org/pulseaudio/server_lookup"))
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pa_log_debug("dbus_connection_unregister_object_path() failed for /org/pulseaudio/server_lookup.");
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}
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if (sl->conn)
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pa_dbus_connection_unref(sl->conn);
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pa_xfree(sl);
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}
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