code.delx.au - pulseaudio/blob - src/daemon/server-lookup.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2009 Tanu Kaskinen
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2.1 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <dbus/dbus.h>
  27
  28 #include <pulse/client-conf.h>
  29 #include <pulse/xmalloc.h>
  30
  31 #include <pulsecore/core.h>
  32 #include <pulsecore/core-util.h>
  33 #include <pulsecore/dbus-common.h>
  34 #include <pulsecore/dbus-shared.h>
  35 #include <pulsecore/macro.h>
  36
  37 #include "server-lookup.h"
  38
  39 struct pa_dbusobj_server_lookup {
  40     pa_core *core;
  41     pa_dbus_connection *conn;
  42     pa_bool_t path_registered;
  43 };
  44
  45 static const char introspection[] =
  46     DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
  47     "<node>"
  48     " <!-- If you are looking for documentation make sure to check out\n"
  49     "      http://pulseaudio.org/wiki/DBusInterface -->\n"
  50     " <interface name=\"org.pulseaudio.ServerLookup\">"
  51     "  <method name=\"GetDBusAddress\">"
  52     "   <arg name=\"result\" type=\"s\" direction=\"out\"/>"
  53     "  </method>"
  54     " </interface>"
  55     " <interface name=\"org.freedesktop.DBus.Introspectable\">"
  56     "  <method name=\"Introspect\">"
  57     "   <arg name=\"data\" type=\"s\" direction=\"out\"/>"
  58     "  </method>"
  59     " </interface>"
  60     "</node>";
  61
  62 static void unregister_cb(DBusConnection *conn, void *user_data) {
  63     pa_dbusobj_server_lookup *sl = user_data;
  64
  65     pa_assert(sl);
  66     pa_assert(sl->path_registered);
  67
  68     sl->path_registered = FALSE;
  69 }
  70
  71 static DBusHandlerResult handle_introspect(DBusConnection *conn, DBusMessage *msg, pa_dbusobj_server_lookup *sl) {
  72     const char *i = introspection;
  73     DBusMessage *reply = NULL;
  74
  75     pa_assert(conn);
  76     pa_assert(msg);
  77
  78     if (!(reply = dbus_message_new_method_return(msg)))
  79         goto fail;
  80
  81     if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &i, DBUS_TYPE_INVALID))
  82         goto fail;
  83
  84     if (!dbus_connection_send(conn, reply, NULL))
  85         goto oom;
  86
  87     dbus_message_unref(reply);
  88
  89     return DBUS_HANDLER_RESULT_HANDLED;
  90
  91 fail:
  92     if (reply)
  93         dbus_message_unref(reply);
  94
  95     return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
  96
  97 oom:
  98     if (reply)
  99         dbus_message_unref(reply);
 100
 101     return DBUS_HANDLER_RESULT_NEED_MEMORY;
 102 }
 103
 104 static DBusHandlerResult handle_get_dbus_address(DBusConnection *conn, DBusMessage *msg, pa_dbusobj_server_lookup *sl) {
 105     DBusMessage *reply = NULL;
 106     pa_client_conf *conf = NULL;
 107     char *address = NULL;
 108
 109     pa_assert(conn);
 110     pa_assert(msg);
 111     pa_assert(sl);
 112
 113     conf = pa_client_conf_new();
 114
 115     if (pa_client_conf_load(conf, NULL) < 0) {
 116         if (!(reply = dbus_message_new_error(msg, "org.pulseaudio.ClientConfLoadError", "Failed to load client.conf.")))
 117             goto fail;
 118         if (!dbus_connection_send(conn, reply, NULL))
 119             goto oom;
 120         return DBUS_HANDLER_RESULT_HANDLED;
 121     }
 122
 123     pa_client_conf_free(conf);
 124
 125     if (conf->default_dbus_server) {
 126         if (!(address = dbus_address_escape_value(conf->default_dbus_server)))
 127             goto oom;
 128     } else {
 129         if (!(address = pa_get_dbus_address_from_server_type(sl->core->server_type))) {
 130             if (!(reply = dbus_message_new_error(msg, DBUS_ERROR_FAILED, "get_dbus_server_from_type() failed.")))
 131                 goto fail;
 132             if (!dbus_connection_send(conn, reply, NULL))
 133                 goto oom;
 134             return DBUS_HANDLER_RESULT_HANDLED;
 135         }
 136     }
 137
 138     if (!(reply = dbus_message_new_method_return(msg)))
 139         goto oom;
 140
 141     if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &address, DBUS_TYPE_INVALID))
 142         goto fail;
 143
 144     if (!dbus_connection_send(conn, reply, NULL))
 145         goto oom;
 146
 147     pa_log_debug("handle_get_dbus_address(): Sent reply with address '%s'.", address);
 148
 149     pa_xfree(address);
 150
 151     dbus_message_unref(reply);
 152
 153     return DBUS_HANDLER_RESULT_HANDLED;
 154
 155 fail:
 156     if (conf)
 157         pa_client_conf_free(conf);
 158
 159     pa_xfree(address);
 160
 161     if (reply)
 162         dbus_message_unref(reply);
 163
 164     return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 165
 166 oom:
 167     if (conf)
 168         pa_client_conf_free(conf);
 169
 170     pa_xfree(address);
 171
 172     if (reply)
 173         dbus_message_unref(reply);
 174
 175     return DBUS_HANDLER_RESULT_NEED_MEMORY;
 176 }
 177
 178 static DBusHandlerResult message_cb(DBusConnection *conn, DBusMessage *msg, void *user_data) {
 179     pa_dbusobj_server_lookup *sl = user_data;
 180
 181     pa_assert(conn);
 182     pa_assert(msg);
 183     pa_assert(sl);
 184
 185     /* 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)); */
 186
 187     if (dbus_message_is_method_call(msg, "org.freedesktop.DBus.Introspectable", "Introspect"))
 188         return handle_introspect(conn, msg, sl);
 189
 190     if (dbus_message_is_method_call(msg, "org.pulseaudio.ServerLookup", "GetDBusAddress"))
 191         return handle_get_dbus_address(conn, msg, sl);
 192
 193     return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 194 }
 195
 196 static DBusObjectPathVTable vtable = {
 197     .unregister_function = unregister_cb,
 198     .message_function = message_cb,
 199     .dbus_internal_pad1 = NULL,
 200     .dbus_internal_pad2 = NULL,
 201     .dbus_internal_pad3 = NULL,
 202     .dbus_internal_pad4 = NULL
 203 };
 204
 205 pa_dbusobj_server_lookup *pa_dbusobj_server_lookup_new(pa_core *c) {
 206     pa_dbusobj_server_lookup *sl;
 207     DBusError error;
 208
 209     dbus_error_init(&error);
 210
 211     sl = pa_xnew(pa_dbusobj_server_lookup, 1);
 212     sl->core = c;
 213     sl->path_registered = FALSE;
 214
 215     if (!(sl->conn = pa_dbus_bus_get(c, DBUS_BUS_SESSION, &error)) || dbus_error_is_set(&error)) {
 216         pa_log("Unable to contact D-Bus: %s: %s", error.name, error.message);
 217         goto fail;
 218     }
 219
 220     if (!dbus_connection_register_object_path(pa_dbus_connection_get(sl->conn), "/org/pulseaudio/server_lookup", &vtable, sl)) {
 221         pa_log("dbus_connection_register_object_path() failed for /org/pulseaudio/server_lookup.");
 222         goto fail;
 223     }
 224
 225     sl->path_registered = TRUE;
 226
 227     return sl;
 228
 229 fail:
 230     dbus_error_free(&error);
 231
 232     pa_dbusobj_server_lookup_free(sl);
 233
 234     return NULL;
 235 }
 236
 237 void pa_dbusobj_server_lookup_free(pa_dbusobj_server_lookup *sl) {
 238     pa_assert(sl);
 239
 240     if (sl->path_registered) {
 241         pa_assert(sl->conn);
 242         if (!dbus_connection_unregister_object_path(pa_dbus_connection_get(sl->conn), "/org/pulseaudio/server_lookup"))
 243             pa_log_debug("dbus_connection_unregister_object_path() failed for /org/pulseaudio/server_lookup.");
 244     }
 245
 246     if (sl->conn)
 247         pa_dbus_connection_unref(sl->conn);
 248
 249     pa_xfree(sl);
 250 }