gio/gdbusserver.c

   1 /* GDBus - GLib D-Bus Library
   2  *
   3  * Copyright (C) 2008-2009 Red Hat, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General
  16  * Public License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  *
  20  * Author: David Zeuthen <davidz@redhat.com>
  21  */
  22
  23 #include "config.h"
  24
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <errno.h>
  28
  29 #include "giotypes.h"
  30 #include "gdbusaddress.h"
  31 #include "gdbusutils.h"
  32 #include "gdbusconnection.h"
  33 #include "gdbusserver.h"
  34 #include "gioenumtypes.h"
  35 #include "gdbusprivate.h"
  36 #include "gdbusauthobserver.h"
  37 #include "gio-marshal.h"
  38 #include "ginitable.h"
  39 #include "gsocketservice.h"
  40
  41 #ifdef G_OS_UNIX
  42 #include <unistd.h>
  43 #include "gunixsocketaddress.h"
  44 #endif
  45
  46 #include "glibintl.h"
  47
  48 /**
  49  * SECTION:gdbusserver
  50  * @short_description: Helper for accepting connections
  51  * @include: gio/gio.h
  52  *
  53  * #GDBusServer is a helper for listening to and accepting D-Bus
  54  * connections.
  55  *
  56  * <example id="gdbus-peer-to-peer"><title>D-Bus peer-to-peer example</title><programlisting><xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gdbus-example-peer.c"><xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback></xi:include></programlisting></example>
  57  */
  58
  59 struct _GDBusServerPrivate
  60 {
  61   GDBusServerFlags flags;
  62   gchar *address;
  63   gchar *guid;
  64
  65   guchar *nonce;
  66   gchar *nonce_file;
  67
  68   gchar *client_address;
  69
  70   GSocketListener *listener;
  71   gboolean is_using_listener;
  72
  73   /* The result of g_main_context_get_thread_default() when the object
  74    * was created (the GObject _init() function) - this is used for delivery
  75    * of the :new-connection GObject signal.
  76    */
  77   GMainContext *main_context_at_construction;
  78
  79   gboolean active;
  80
  81   GDBusAuthObserver *authentication_observer;
  82 };
  83
  84 enum
  85 {
  86   PROP_0,
  87   PROP_ADDRESS,
  88   PROP_CLIENT_ADDRESS,
  89   PROP_FLAGS,
  90   PROP_GUID,
  91   PROP_ACTIVE,
  92   PROP_AUTHENTICATION_OBSERVER,
  93 };
  94
  95 enum
  96 {
  97   NEW_CONNECTION_SIGNAL,
  98   LAST_SIGNAL,
  99 };
 100
 101 guint _signals[LAST_SIGNAL] = {0};
 102
 103 static void initable_iface_init       (GInitableIface *initable_iface);
 104
 105 G_DEFINE_TYPE_WITH_CODE (GDBusServer, g_dbus_server, G_TYPE_OBJECT,
 106                          G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, initable_iface_init)
 107                          );
 108
 109 static void
 110 g_dbus_server_finalize (GObject *object)
 111 {
 112   GDBusServer *server = G_DBUS_SERVER (object);
 113
 114   if (server->priv->authentication_observer != NULL)
 115     g_object_unref (server->priv->authentication_observer);
 116
 117   if (server->priv->listener != NULL)
 118     g_object_unref (server->priv->listener);
 119
 120   g_free (server->priv->address);
 121   g_free (server->priv->guid);
 122   g_free (server->priv->client_address);
 123   if (server->priv->nonce != NULL)
 124     {
 125       memset (server->priv->nonce, '\0', 16);
 126       g_free (server->priv->nonce);
 127     }
 128   /* we could unlink the nonce file but I don't
 129    * think it's really worth the effort/risk
 130    */
 131   g_free (server->priv->nonce_file);
 132
 133   if (server->priv->main_context_at_construction != NULL)
 134     g_main_context_unref (server->priv->main_context_at_construction);
 135
 136   if (G_OBJECT_CLASS (g_dbus_server_parent_class)->finalize != NULL)
 137     G_OBJECT_CLASS (g_dbus_server_parent_class)->finalize (object);
 138 }
 139
 140 static void
 141 g_dbus_server_get_property (GObject    *object,
 142                             guint       prop_id,
 143                             GValue     *value,
 144                             GParamSpec *pspec)
 145 {
 146   GDBusServer *server = G_DBUS_SERVER (object);
 147
 148   switch (prop_id)
 149     {
 150     case PROP_FLAGS:
 151       g_value_set_flags (value, server->priv->flags);
 152       break;
 153
 154     case PROP_GUID:
 155       g_value_set_string (value, server->priv->guid);
 156       break;
 157
 158     case PROP_ADDRESS:
 159       g_value_set_string (value, server->priv->address);
 160       break;
 161
 162     case PROP_CLIENT_ADDRESS:
 163       g_value_set_string (value, server->priv->client_address);
 164       break;
 165
 166     case PROP_ACTIVE:
 167       g_value_set_boolean (value, server->priv->active);
 168       break;
 169
 170     case PROP_AUTHENTICATION_OBSERVER:
 171       g_value_set_object (value, server->priv->authentication_observer);
 172       break;
 173
 174     default:
 175       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 176       break;
 177     }
 178 }
 179
 180 static void
 181 g_dbus_server_set_property (GObject      *object,
 182                             guint         prop_id,
 183                             const GValue *value,
 184                             GParamSpec   *pspec)
 185 {
 186   GDBusServer *server = G_DBUS_SERVER (object);
 187
 188   switch (prop_id)
 189     {
 190     case PROP_FLAGS:
 191       server->priv->flags = g_value_get_flags (value);
 192       break;
 193
 194     case PROP_GUID:
 195       server->priv->guid = g_value_dup_string (value);
 196       break;
 197
 198     case PROP_ADDRESS:
 199       server->priv->address = g_value_dup_string (value);
 200       break;
 201
 202     case PROP_AUTHENTICATION_OBSERVER:
 203       server->priv->authentication_observer = g_value_dup_object (value);
 204       break;
 205
 206     default:
 207       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 208       break;
 209     }
 210 }
 211
 212 static void
 213 g_dbus_server_class_init (GDBusServerClass *klass)
 214 {
 215   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 216
 217   gobject_class->finalize     = g_dbus_server_finalize;
 218   gobject_class->set_property = g_dbus_server_set_property;
 219   gobject_class->get_property = g_dbus_server_get_property;
 220
 221   /**
 222    * GDBusServer:flags:
 223    *
 224    * Flags from the #GDBusServerFlags enumeration.
 225    *
 226    * Since: 2.26
 227    */
 228   g_object_class_install_property (gobject_class,
 229                                    PROP_FLAGS,
 230                                    g_param_spec_flags ("flags",
 231                                                        _("Flags"),
 232                                                        _("Flags for the server"),
 233                                                        G_TYPE_DBUS_SERVER_FLAGS,
 234                                                        G_DBUS_SERVER_FLAGS_NONE,
 235                                                        G_PARAM_READABLE |
 236                                                        G_PARAM_WRITABLE |
 237                                                        G_PARAM_CONSTRUCT_ONLY |
 238                                                        G_PARAM_STATIC_NAME |
 239                                                        G_PARAM_STATIC_BLURB |
 240                                                        G_PARAM_STATIC_NICK));
 241
 242   /**
 243    * GDBusServer:guid:
 244    *
 245    * The guid of the server.
 246    *
 247    * Since: 2.26
 248    */
 249   g_object_class_install_property (gobject_class,
 250                                    PROP_GUID,
 251                                    g_param_spec_string ("guid",
 252                                                         _("GUID"),
 253                                                         _("The guid of the server"),
 254                                                         NULL,
 255                                                         G_PARAM_READABLE |
 256                                                         G_PARAM_WRITABLE |
 257                                                         G_PARAM_CONSTRUCT_ONLY |
 258                                                         G_PARAM_STATIC_NAME |
 259                                                         G_PARAM_STATIC_BLURB |
 260                                                         G_PARAM_STATIC_NICK));
 261
 262   /**
 263    * GDBusServer:address:
 264    *
 265    * The D-Bus address to listen on.
 266    *
 267    * Since: 2.26
 268    */
 269   g_object_class_install_property (gobject_class,
 270                                    PROP_ADDRESS,
 271                                    g_param_spec_string ("address",
 272                                                         _("Address"),
 273                                                         _("The address to listen on"),
 274                                                         NULL,
 275                                                         G_PARAM_READABLE |
 276                                                         G_PARAM_WRITABLE |
 277                                                         G_PARAM_CONSTRUCT_ONLY |
 278                                                         G_PARAM_STATIC_NAME |
 279                                                         G_PARAM_STATIC_BLURB |
 280                                                         G_PARAM_STATIC_NICK));
 281
 282   /**
 283    * GDBusServer:client-address:
 284    *
 285    * The D-Bus address that clients can use.
 286    *
 287    * Since: 2.26
 288    */
 289   g_object_class_install_property (gobject_class,
 290                                    PROP_CLIENT_ADDRESS,
 291                                    g_param_spec_string ("client-address",
 292                                                         _("Client Address"),
 293                                                         _("The address clients can use"),
 294                                                         NULL,
 295                                                         G_PARAM_READABLE |
 296                                                         G_PARAM_STATIC_NAME |
 297                                                         G_PARAM_STATIC_BLURB |
 298                                                         G_PARAM_STATIC_NICK));
 299
 300   /**
 301    * GDBusServer:active:
 302    *
 303    * Whether the server is currently active.
 304    *
 305    * Since: 2.26
 306    */
 307   g_object_class_install_property (gobject_class,
 308                                    PROP_ACTIVE,
 309                                    g_param_spec_string ("active",
 310                                                         _("Active"),
 311                                                         _("Whether the server is currently active"),
 312                                                         NULL,
 313                                                         G_PARAM_READABLE |
 314                                                         G_PARAM_STATIC_NAME |
 315                                                         G_PARAM_STATIC_BLURB |
 316                                                         G_PARAM_STATIC_NICK));
 317
 318   /**
 319    * GDBusServer:authentication-observer:
 320    *
 321    * A #GDBusAuthObserver object to assist in the authentication process or %NULL.
 322    *
 323    * Since: 2.26
 324    */
 325   g_object_class_install_property (gobject_class,
 326                                    PROP_AUTHENTICATION_OBSERVER,
 327                                    g_param_spec_object ("authentication-observer",
 328                                                         _("Authentication Observer"),
 329                                                         _("Object used to assist in the authentication process"),
 330                                                         G_TYPE_DBUS_AUTH_OBSERVER,
 331                                                         G_PARAM_READABLE |
 332                                                         G_PARAM_WRITABLE |
 333                                                         G_PARAM_CONSTRUCT_ONLY |
 334                                                         G_PARAM_STATIC_NAME |
 335                                                         G_PARAM_STATIC_BLURB |
 336                                                         G_PARAM_STATIC_NICK));
 337
 338   /**
 339    * GDBusServer::new-connection:
 340    * @server: The #GDBusServer emitting the signal.
 341    * @connection: A #GDBusConnection for the new connection.
 342    *
 343    * Emitted when a new authenticated connection has been made. Use
 344    * g_dbus_connection_get_peer_credentials() to figure out what
 345    * identity (if any), was authenticated.
 346    *
 347    * If you want to accept the connection, simply ref the @connection
 348    * object. Then call g_dbus_connection_close() and unref it when you
 349    * are done with it. A typical thing to do when accepting a
 350    * connection is to listen to the #GDBusConnection::closed signal.
 351    *
 352    * If #GDBusServer:flags contains %G_DBUS_SERVER_FLAGS_RUN_IN_THREAD
 353    * then the signal is emitted in a new thread dedicated to the
 354    * connection. Otherwise the signal is emitted in the <link
 355    * linkend="g-main-context-push-thread-default">thread-default main
 356    * loop</link> of the thread that @server was constructed in.
 357    *
 358    * Since: 2.26
 359    */
 360   _signals[NEW_CONNECTION_SIGNAL] = g_signal_new ("new-connection",
 361                                                   G_TYPE_DBUS_SERVER,
 362                                                   G_SIGNAL_RUN_LAST,
 363                                                   G_STRUCT_OFFSET (GDBusServerClass, new_connection),
 364                                                   NULL,
 365                                                   NULL,
 366                                                   g_cclosure_marshal_VOID__OBJECT,
 367                                                   G_TYPE_NONE,
 368                                                   1,
 369                                                   G_TYPE_DBUS_CONNECTION);
 370
 371
 372   g_type_class_add_private (klass, sizeof (GDBusServerPrivate));
 373 }
 374
 375 static void
 376 g_dbus_server_init (GDBusServer *server)
 377 {
 378   server->priv = G_TYPE_INSTANCE_GET_PRIVATE (server, G_TYPE_DBUS_SERVER, GDBusServerPrivate);
 379
 380   server->priv->main_context_at_construction = g_main_context_get_thread_default ();
 381   if (server->priv->main_context_at_construction != NULL)
 382     g_main_context_ref (server->priv->main_context_at_construction);
 383 }
 384
 385 static gboolean
 386 on_run (GSocketService    *service,
 387         GSocketConnection *socket_connection,
 388         GObject           *source_object,
 389         gpointer           user_data);
 390
 391 /**
 392  * g_dbus_server_new_sync:
 393  * @address: A D-Bus address.
 394  * @flags: Flags from the #GDBusServerFlags enumeration.
 395  * @guid: A D-Bus GUID.
 396  * @observer: A #GDBusAuthObserver or %NULL.
 397  * @cancellable: A #GCancellable or %NULL.
 398  * @error: Return location for server or %NULL.
 399  *
 400  * Creates a new D-Bus server that listens on the first address in
 401  * @address that works.
 402  *
 403  * Once constructed, you can use g_dbus_server_get_client_address() to
 404  * get a D-Bus address string that clients can use to connect.
 405  *
 406  * Connect to the #GDBusServer::new-connection signal to handle
 407  * incoming connections.
 408  *
 409  * The returned #GDBusServer isn't active - you have to start it with
 410  * g_dbus_server_start().
 411  *
 412  * See <xref linkend="gdbus-peer-to-peer"/> for how #GDBusServer can
 413  * be used.
 414  *
 415  * This is a synchronous failable constructor. See
 416  * g_dbus_server_new() for the asynchronous version.
 417  *
 418  * Returns: A #GDBusServer or %NULL if @error is set. Free with
 419  * g_object_unref().
 420  *
 421  * Since: 2.26
 422  */
 423 GDBusServer *
 424 g_dbus_server_new_sync (const gchar          *address,
 425                         GDBusServerFlags      flags,
 426                         const gchar          *guid,
 427                         GDBusAuthObserver    *observer,
 428                         GCancellable         *cancellable,
 429                         GError              **error)
 430 {
 431   GDBusServer *server;
 432
 433   g_return_val_if_fail (address != NULL, NULL);
 434   g_return_val_if_fail (g_dbus_is_guid (guid), NULL);
 435   g_return_val_if_fail (error == NULL || *error == NULL, NULL);
 436
 437   server = g_initable_new (G_TYPE_DBUS_SERVER,
 438                            cancellable,
 439                            error,
 440                            "address", address,
 441                            "flags", flags,
 442                            "guid", guid,
 443                            "authentication-observer", observer,
 444                            NULL);
 445   if (server != NULL)
 446     {
 447       /* Right now we don't have any transport not using the listener... */
 448       g_assert (server->priv->is_using_listener);
 449       g_signal_connect (G_SOCKET_SERVICE (server->priv->listener),
 450                         "run",
 451                         G_CALLBACK (on_run),
 452                         server);
 453     }
 454
 455   return server;
 456 }
 457
 458 /**
 459  * g_dbus_server_get_client_address:
 460  * @server: A #GDBusServer.
 461  *
 462  * Gets a D-Bus address string that can be used by clients to connect
 463  * to @server.
 464  *
 465  * Returns: A D-Bus address string. Do not free, the string is owned
 466  * by @server.
 467  *
 468  * Since: 2.26
 469  */
 470 const gchar *
 471 g_dbus_server_get_client_address (GDBusServer *server)
 472 {
 473   g_return_val_if_fail (G_IS_DBUS_SERVER (server), NULL);
 474   return server->priv->client_address;
 475 }
 476
 477 /**
 478  * g_dbus_server_get_guid:
 479  * @server: A #GDBusServer.
 480  *
 481  * Gets the GUID for @server.
 482  *
 483  * Returns: A D-Bus GUID. Do not free this string, it is owned by @server.
 484  *
 485  * Since: 2.26
 486  */
 487 const gchar *
 488 g_dbus_server_get_guid (GDBusServer *server)
 489 {
 490   g_return_val_if_fail (G_IS_DBUS_SERVER (server), NULL);
 491   return server->priv->guid;
 492 }
 493
 494 /**
 495  * g_dbus_server_get_flags:
 496  * @server: A #GDBusServer.
 497  *
 498  * Gets the flags for @server.
 499  *
 500  * Returns: A set of flags from the #GDBusServerFlags enumeration.
 501  *
 502  * Since: 2.26
 503  */
 504 GDBusServerFlags
 505 g_dbus_server_get_flags (GDBusServer *server)
 506 {
 507   g_return_val_if_fail (G_IS_DBUS_SERVER (server), G_DBUS_SERVER_FLAGS_NONE);
 508   return server->priv->flags;
 509 }
 510
 511 /**
 512  * g_dbus_server_is_active:
 513  * @server: A #GDBusServer.
 514  *
 515  * Gets whether @server is active.
 516  *
 517  * Returns: %TRUE if server is active, %FALSE otherwise.
 518  *
 519  * Since: 2.26
 520  */
 521 gboolean
 522 g_dbus_server_is_active (GDBusServer *server)
 523 {
 524   g_return_val_if_fail (G_IS_DBUS_SERVER (server), G_DBUS_SERVER_FLAGS_NONE);
 525   return server->priv->active;
 526 }
 527
 528 /**
 529  * g_dbus_server_start:
 530  * @server: A #GDBusServer.
 531  *
 532  * Starts @server.
 533  *
 534  * Since: 2.26
 535  */
 536 void
 537 g_dbus_server_start (GDBusServer *server)
 538 {
 539   g_return_if_fail (G_IS_DBUS_SERVER (server));
 540   if (server->priv->active)
 541     return;
 542   /* Right now we don't have any transport not using the listener... */
 543   g_assert (server->priv->is_using_listener);
 544   g_socket_service_start (G_SOCKET_SERVICE (server->priv->listener));
 545   server->priv->active = TRUE;
 546   g_object_notify (G_OBJECT (server), "active");
 547 }
 548
 549 /**
 550  * g_dbus_server_stop:
 551  * @server: A #GDBusServer.
 552  *
 553  * Stops @server.
 554  *
 555  * Since: 2.26
 556  */
 557 void
 558 g_dbus_server_stop (GDBusServer *server)
 559 {
 560   g_return_if_fail (G_IS_DBUS_SERVER (server));
 561   if (!server->priv->active)
 562     return;
 563   /* Right now we don't have any transport not using the listener... */
 564   g_assert (server->priv->is_using_listener);
 565   g_socket_service_stop (G_SOCKET_SERVICE (server->priv->listener));
 566   server->priv->active = FALSE;
 567   g_object_notify (G_OBJECT (server), "active");
 568 }
 569
 570 /* ---------------------------------------------------------------------------------------------------- */
 571
 572 #ifdef G_OS_UNIX
 573
 574 static gint
 575 random_ascii (void)
 576 {
 577   gint ret;
 578   ret = g_random_int_range (0, 60);
 579   if (ret < 25)
 580     ret += 'A';
 581   else if (ret < 50)
 582     ret += 'a' - 25;
 583   else
 584     ret += '0' - 50;
 585   return ret;
 586 }
 587
 588 /* note that address_entry has already been validated => exactly one of path, tmpdir or abstract keys are set */
 589 static gboolean
 590 try_unix (GDBusServer  *server,
 591           const gchar  *address_entry,
 592           GHashTable   *key_value_pairs,
 593           GError      **error)
 594 {
 595   gboolean ret;
 596   const gchar *path;
 597   const gchar *tmpdir;
 598   const gchar *abstract;
 599   GSocketAddress *address;
 600
 601   ret = FALSE;
 602   address = NULL;
 603
 604   path = g_hash_table_lookup (key_value_pairs, "path");
 605   tmpdir = g_hash_table_lookup (key_value_pairs, "tmpdir");
 606   abstract = g_hash_table_lookup (key_value_pairs, "abstract");
 607
 608   if (path != NULL)
 609     {
 610       address = g_unix_socket_address_new (path);
 611     }
 612   else if (tmpdir != NULL)
 613     {
 614       gint n;
 615       GString *s;
 616       GError *local_error;
 617
 618     retry:
 619       s = g_string_new (tmpdir);
 620       g_string_append (s, "/dbus-");
 621       for (n = 0; n < 8; n++)
 622         g_string_append_c (s, random_ascii ());
 623
 624       /* prefer abstract namespace if available */
 625       if (g_unix_socket_address_abstract_names_supported ())
 626         address = g_unix_socket_address_new_with_type (s->str,
 627                                                        -1,
 628                                                        G_UNIX_SOCKET_ADDRESS_ABSTRACT);
 629       else
 630         address = g_unix_socket_address_new (s->str);
 631       g_string_free (s, TRUE);
 632
 633       local_error = NULL;
 634       if (!g_socket_listener_add_address (server->priv->listener,
 635                                           address,
 636                                           G_SOCKET_TYPE_STREAM,
 637                                           G_SOCKET_PROTOCOL_DEFAULT,
 638                                           NULL, /* source_object */
 639                                           NULL, /* effective_address */
 640                                           &local_error))
 641         {
 642           if (local_error->domain == G_IO_ERROR && local_error->code == G_IO_ERROR_ADDRESS_IN_USE)
 643             {
 644               g_error_free (local_error);
 645               goto retry;
 646             }
 647           g_propagate_error (error, local_error);
 648           goto out;
 649         }
 650       ret = TRUE;
 651       goto out;
 652     }
 653   else if (abstract != NULL)
 654     {
 655       if (!g_unix_socket_address_abstract_names_supported ())
 656         {
 657           g_set_error_literal (error,
 658                                G_IO_ERROR,
 659                                G_IO_ERROR_NOT_SUPPORTED,
 660                                _("Abstract name space not supported"));
 661           goto out;
 662         }
 663       address = g_unix_socket_address_new_with_type (abstract,
 664                                                      -1,
 665                                                      G_UNIX_SOCKET_ADDRESS_ABSTRACT);
 666     }
 667   else
 668     {
 669       g_assert_not_reached ();
 670     }
 671
 672   if (!g_socket_listener_add_address (server->priv->listener,
 673                                       address,
 674                                       G_SOCKET_TYPE_STREAM,
 675                                       G_SOCKET_PROTOCOL_DEFAULT,
 676                                       NULL, /* source_object */
 677                                       NULL, /* effective_address */
 678                                       error))
 679     goto out;
 680
 681   ret = TRUE;
 682
 683  out:
 684
 685   if (address != NULL)
 686     {
 687       /* Fill out client_address if the connection attempt worked */
 688       if (ret)
 689         {
 690           server->priv->is_using_listener = TRUE;
 691
 692           switch (g_unix_socket_address_get_address_type (G_UNIX_SOCKET_ADDRESS (address)))
 693             {
 694             case G_UNIX_SOCKET_ADDRESS_ABSTRACT:
 695               server->priv->client_address = g_strdup_printf ("unix:abstract=%s",
 696                                                               g_unix_socket_address_get_path (G_UNIX_SOCKET_ADDRESS (address)));
 697               break;
 698
 699             case G_UNIX_SOCKET_ADDRESS_PATH:
 700               server->priv->client_address = g_strdup_printf ("unix:path=%s",
 701                                                               g_unix_socket_address_get_path (G_UNIX_SOCKET_ADDRESS (address)));
 702               break;
 703
 704             default:
 705               g_assert_not_reached ();
 706               break;
 707             }
 708         }
 709       g_object_unref (address);
 710     }
 711   return ret;
 712 }
 713 #endif
 714
 715 /* ---------------------------------------------------------------------------------------------------- */
 716
 717 /* note that address_entry has already been validated =>
 718  *  both host and port (guranteed to be a number in [0, 65535]) are set (family is optional)
 719  */
 720 static gboolean
 721 try_tcp (GDBusServer  *server,
 722          const gchar  *address_entry,
 723          GHashTable   *key_value_pairs,
 724          gboolean      do_nonce,
 725          GError      **error)
 726 {
 727   gboolean ret;
 728   const gchar *host;
 729   const gchar *port;
 730   const gchar *family;
 731   gint port_num;
 732   GSocketAddress *address;
 733   GResolver *resolver;
 734   GList *resolved_addresses;
 735   GList *l;
 736
 737   ret = FALSE;
 738   address = NULL;
 739   resolver = NULL;
 740   resolved_addresses = NULL;
 741
 742   host = g_hash_table_lookup (key_value_pairs, "host");
 743   port = g_hash_table_lookup (key_value_pairs, "port");
 744   family = g_hash_table_lookup (key_value_pairs, "family");
 745   if (g_hash_table_lookup (key_value_pairs, "noncefile") != NULL)
 746     {
 747       g_set_error_literal (error,
 748                            G_IO_ERROR,
 749                            G_IO_ERROR_INVALID_ARGUMENT,
 750                            _("Cannot specify nonce file when creating a server"));
 751       goto out;
 752     }
 753
 754   if (host == NULL)
 755     host = "localhost";
 756   if (port == NULL)
 757     port = "0";
 758   port_num = strtol (port, NULL, 10);
 759
 760   resolver = g_resolver_get_default ();
 761   resolved_addresses = g_resolver_lookup_by_name (resolver,
 762                                                   host,
 763                                                   NULL,
 764                                                   error);
 765   if (resolved_addresses == NULL)
 766     {
 767       goto out;
 768     }
 769   /* TODO: handle family */
 770   for (l = resolved_addresses; l != NULL; l = l->next)
 771     {
 772       GInetAddress *address = G_INET_ADDRESS (l->data);
 773       GSocketAddress *socket_address;
 774       GSocketAddress *effective_address;
 775
 776       socket_address = g_inet_socket_address_new (address, port_num);
 777       if (!g_socket_listener_add_address (server->priv->listener,
 778                                           socket_address,
 779                                           G_SOCKET_TYPE_STREAM,
 780                                           G_SOCKET_PROTOCOL_TCP,
 781                                           NULL, /* GObject *source_object */
 782                                           &effective_address,
 783                                           error))
 784         {
 785           g_object_unref (socket_address);
 786           goto out;
 787         }
 788       if (port_num == 0)
 789         {
 790           /* make sure we allocate the same port number for other listeners */
 791           port_num = g_inet_socket_address_get_port (G_INET_SOCKET_ADDRESS (effective_address));
 792         }
 793       g_object_unref (effective_address);
 794       g_object_unref (socket_address);
 795     }
 796
 797   if (do_nonce)
 798     {
 799       gint fd;
 800       guint n;
 801       gsize bytes_written;
 802       gsize bytes_remaining;
 803
 804       server->priv->nonce = g_new0 (guchar, 16);
 805       for (n = 0; n < 16; n++)
 806         server->priv->nonce[n] = g_random_int_range (0, 256);
 807       fd = g_file_open_tmp ("gdbus-nonce-file-XXXXXX",
 808                             &server->priv->nonce_file,
 809                             error);
 810       if (fd == -1)
 811         {
 812           g_socket_listener_close (server->priv->listener);
 813           goto out;
 814         }
 815     again:
 816       bytes_written = 0;
 817       bytes_remaining = 16;
 818       while (bytes_remaining > 0)
 819         {
 820           gssize ret;
 821           ret = write (fd, server->priv->nonce + bytes_written, bytes_remaining);
 822           if (ret == -1)
 823             {
 824               if (errno == EINTR)
 825                 goto again;
 826               g_set_error (error,
 827                            G_IO_ERROR,
 828                            g_io_error_from_errno (errno),
 829                            _("Error writing nonce file at `%s': %s"),
 830                            server->priv->nonce_file,
 831                            strerror (errno));
 832               goto out;
 833             }
 834           bytes_written += ret;
 835           bytes_remaining -= ret;
 836         }
 837       close (fd);
 838       server->priv->client_address = g_strdup_printf ("nonce-tcp:host=%s,port=%d,noncefile=%s",
 839                                                       host,
 840                                                       port_num,
 841                                                       server->priv->nonce_file);
 842     }
 843   else
 844     {
 845       server->priv->client_address = g_strdup_printf ("tcp:host=%s,port=%d", host, port_num);
 846     }
 847   server->priv->is_using_listener = TRUE;
 848   ret = TRUE;
 849
 850  out:
 851   g_list_foreach (resolved_addresses, (GFunc) g_object_unref, NULL);
 852   g_list_free (resolved_addresses);
 853   g_object_unref (resolver);
 854   return ret;
 855 }
 856
 857 /* ---------------------------------------------------------------------------------------------------- */
 858
 859 typedef struct
 860 {
 861   GDBusServer *server;
 862   GDBusConnection *connection;
 863 } EmitIdleData;
 864
 865 static void
 866 emit_idle_data_free (EmitIdleData *data)
 867 {
 868   g_object_unref (data->server);
 869   g_object_unref (data->connection);
 870   g_free (data);
 871 }
 872
 873 static gboolean
 874 emit_new_connection_in_idle (gpointer user_data)
 875 {
 876   EmitIdleData *data = user_data;
 877
 878   g_signal_emit (data->server,
 879                  _signals[NEW_CONNECTION_SIGNAL],
 880                  0,
 881                  data->connection);
 882   g_object_unref (data->connection);
 883
 884   return FALSE;
 885 }
 886
 887 /* Called in new thread */
 888 static gboolean
 889 on_run (GSocketService    *service,
 890         GSocketConnection *socket_connection,
 891         GObject           *source_object,
 892         gpointer           user_data)
 893 {
 894   GDBusServer *server = G_DBUS_SERVER (user_data);
 895   GDBusConnection *connection;
 896   GDBusConnectionFlags connection_flags;
 897
 898   if (server->priv->nonce != NULL)
 899     {
 900       gchar buf[16];
 901       gsize bytes_read;
 902
 903       if (!g_input_stream_read_all (g_io_stream_get_input_stream (G_IO_STREAM (socket_connection)),
 904                                     buf,
 905                                     16,
 906                                     &bytes_read,
 907                                     NULL,  /* GCancellable */
 908                                     NULL)) /* GError */
 909         goto out;
 910
 911       if (bytes_read != 16)
 912         goto out;
 913
 914       if (memcmp (buf, server->priv->nonce, 16) != 0)
 915         goto out;
 916     }
 917
 918   connection_flags = G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER;
 919   if (server->priv->flags & G_DBUS_SERVER_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS)
 920     connection_flags |= G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS;
 921
 922   connection = g_dbus_connection_new_sync (G_IO_STREAM (socket_connection),
 923                                            server->priv->guid,
 924                                            connection_flags,
 925                                            server->priv->authentication_observer,
 926                                            NULL,  /* GCancellable */
 927                                            NULL); /* GError */
 928   if (connection == NULL)
 929       goto out;
 930
 931   if (server->priv->flags & G_DBUS_SERVER_FLAGS_RUN_IN_THREAD)
 932     {
 933       g_signal_emit (server,
 934                      _signals[NEW_CONNECTION_SIGNAL],
 935                      0,
 936                      connection);
 937       g_object_unref (connection);
 938     }
 939   else
 940     {
 941       GSource *idle_source;
 942       EmitIdleData *data;
 943
 944       data = g_new0 (EmitIdleData, 1);
 945       data->server = g_object_ref (server);
 946       data->connection = g_object_ref (connection);
 947
 948       idle_source = g_idle_source_new ();
 949       g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
 950       g_source_set_callback (idle_source,
 951                              emit_new_connection_in_idle,
 952                              data,
 953                              (GDestroyNotify) emit_idle_data_free);
 954       g_source_attach (idle_source, server->priv->main_context_at_construction);
 955       g_source_unref (idle_source);
 956     }
 957
 958  out:
 959   return TRUE;
 960 }
 961
 962 static gboolean
 963 initable_init (GInitable       *initable,
 964                GCancellable    *cancellable,
 965                GError         **error)
 966 {
 967   GDBusServer *server = G_DBUS_SERVER (initable);
 968   gboolean ret;
 969   guint n;
 970   gchar **addr_array;
 971   GError *last_error;
 972
 973   ret = FALSE;
 974   last_error = NULL;
 975
 976   if (!g_dbus_is_guid (server->priv->guid))
 977     {
 978       g_set_error (&last_error,
 979                    G_IO_ERROR,
 980                    G_IO_ERROR_INVALID_ARGUMENT,
 981                    _("The string `%s' is not a valid D-Bus GUID"),
 982                    server->priv->guid);
 983       goto out;
 984     }
 985
 986   server->priv->listener = G_SOCKET_LISTENER (g_threaded_socket_service_new (-1));
 987
 988   addr_array = g_strsplit (server->priv->address, ";", 0);
 989   last_error = NULL;
 990   for (n = 0; addr_array != NULL && addr_array[n] != NULL; n++)
 991     {
 992       const gchar *address_entry = addr_array[n];
 993       GHashTable *key_value_pairs;
 994       gchar *transport_name;
 995       GError *this_error;
 996
 997       this_error = NULL;
 998       if (g_dbus_is_supported_address (address_entry,
 999                                        &this_error) &&
1000           _g_dbus_address_parse_entry (address_entry,
1001                                        &transport_name,
1002                                        &key_value_pairs,
1003                                        &this_error))
1004         {
1005
1006           if (FALSE)
1007             {
1008             }
1009 #ifdef G_OS_UNIX
1010           else if (g_strcmp0 (transport_name, "unix") == 0)
1011             {
1012               ret = try_unix (server, address_entry, key_value_pairs, &this_error);
1013             }
1014 #endif
1015           else if (g_strcmp0 (transport_name, "tcp") == 0)
1016             {
1017               ret = try_tcp (server, address_entry, key_value_pairs, FALSE, &this_error);
1018             }
1019           else if (g_strcmp0 (transport_name, "nonce-tcp") == 0)
1020             {
1021               ret = try_tcp (server, address_entry, key_value_pairs, TRUE, &this_error);
1022             }
1023           else
1024             {
1025               g_set_error (&this_error,
1026                            G_IO_ERROR,
1027                            G_IO_ERROR_INVALID_ARGUMENT,
1028                            _("Cannot listen on unsupported transport `%s'"),
1029                            transport_name);
1030             }
1031
1032           g_free (transport_name);
1033           if (key_value_pairs != NULL)
1034             g_hash_table_unref (key_value_pairs);
1035
1036           if (ret)
1037             {
1038               g_assert (this_error == NULL);
1039               goto out;
1040             }
1041         }
1042
1043       if (this_error != NULL)
1044         {
1045           if (last_error != NULL)
1046             g_error_free (last_error);
1047           last_error = this_error;
1048         }
1049     }
1050
1051   if (!ret)
1052     goto out;
1053
1054  out:
1055   if (ret)
1056     {
1057       if (last_error != NULL)
1058         g_error_free (last_error);
1059     }
1060   else
1061     {
1062       g_assert (last_error != NULL);
1063       g_propagate_error (error, last_error);
1064     }
1065   return ret;
1066 }
1067
1068
1069 static void
1070 initable_iface_init (GInitableIface *initable_iface)
1071 {
1072   initable_iface->init = initable_init;
1073 }
1074
1075 /* ---------------------------------------------------------------------------------------------------- */