gio/gdbusserver.c

   1 /* GDBus - GLib D-Bus Library
   2  *
   3  * Copyright (C) 2008-2010 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 #ifdef HAVE_UNISTD_H
  29 #include <unistd.h>
  30 #endif
  31 #ifdef _WIN32
  32 #include <io.h>
  33 #endif
  34
  35 #include "giotypes.h"
  36 #include "gioerror.h"
  37 #include "gdbusaddress.h"
  38 #include "gdbusutils.h"
  39 #include "gdbusconnection.h"
  40 #include "gdbusserver.h"
  41 #include "gioenumtypes.h"
  42 #include "gdbusprivate.h"
  43 #include "gdbusauthobserver.h"
  44 #include "gio-marshal.h"
  45 #include "ginitable.h"
  46 #include "gsocketservice.h"
  47 #include "gthreadedsocketservice.h"
  48 #include "gresolver.h"
  49 #include "ginetaddress.h"
  50 #include "ginetsocketaddress.h"
  51 #include "ginputstream.h"
  52 #include "giostream.h"
  53
  54 #ifdef G_OS_UNIX
  55 #include "gunixsocketaddress.h"
  56 #endif
  57
  58 #include "glibintl.h"
  59
  60 /**
  61  * SECTION:gdbusserver
  62  * @short_description: Helper for accepting connections
  63  * @include: gio/gio.h
  64  *
  65  * #GDBusServer is a helper for listening to and accepting D-Bus
  66  * connections. This can be used to create a new D-Bus server, allowing two
  67  * peers to use the D-Bus protocol for their own specialized communication.
  68  * A server instance provided in this way will not perform message routing or
  69  * implement the org.freedesktop.DBus interface.
  70  *
  71  * To just export an object on a well-known name on a message bus, such as the
  72  * session or system bus, you should instead use g_bus_own_name().
  73  *
  74  * <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>
  75  */
  76
  77 /**
  78  * GDBusServer:
  79  *
  80  * The #GDBusServer structure contains only private data and
  81  * should only be accessed using the provided API.
  82  *
  83  * Since: 2.26
  84  */
  85 struct _GDBusServer
  86 {
  87   /*< private >*/
  88   GObject parent_instance;
  89
  90   GDBusServerFlags flags;
  91   gchar *address;
  92   gchar *guid;
  93
  94   guchar *nonce;
  95   gchar *nonce_file;
  96
  97   gchar *client_address;
  98
  99   GSocketListener *listener;
 100   gboolean is_using_listener;
 101   gulong run_signal_handler_id;
 102
 103   /* The result of g_main_context_get_thread_default() when the object
 104    * was created (the GObject _init() function) - this is used for delivery
 105    * of the :new-connection GObject signal.
 106    */
 107   GMainContext *main_context_at_construction;
 108
 109   gboolean active;
 110
 111   GDBusAuthObserver *authentication_observer;
 112 };
 113
 114 typedef struct _GDBusServerClass GDBusServerClass;
 115
 116 /**
 117  * GDBusServerClass:
 118  * @new_connection: Signal class handler for the #GDBusServer::new-connection signal.
 119  *
 120  * Class structure for #GDBusServer.
 121  *
 122  * Since: 2.26
 123  */
 124 struct _GDBusServerClass
 125 {
 126   /*< private >*/
 127   GObjectClass parent_class;
 128
 129   /*< public >*/
 130   /* Signals */
 131   gboolean (*new_connection) (GDBusServer      *server,
 132                               GDBusConnection  *connection);
 133 };
 134
 135 enum
 136 {
 137   PROP_0,
 138   PROP_ADDRESS,
 139   PROP_CLIENT_ADDRESS,
 140   PROP_FLAGS,
 141   PROP_GUID,
 142   PROP_ACTIVE,
 143   PROP_AUTHENTICATION_OBSERVER,
 144 };
 145
 146 enum
 147 {
 148   NEW_CONNECTION_SIGNAL,
 149   LAST_SIGNAL,
 150 };
 151
 152 guint _signals[LAST_SIGNAL] = {0};
 153
 154 static void initable_iface_init       (GInitableIface *initable_iface);
 155
 156 G_DEFINE_TYPE_WITH_CODE (GDBusServer, g_dbus_server, G_TYPE_OBJECT,
 157                          G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, initable_iface_init)
 158                          );
 159
 160 static void
 161 g_dbus_server_finalize (GObject *object)
 162 {
 163   GDBusServer *server = G_DBUS_SERVER (object);
 164
 165   if (server->authentication_observer != NULL)
 166     g_object_unref (server->authentication_observer);
 167
 168   if (server->run_signal_handler_id > 0)
 169     g_signal_handler_disconnect (server->listener, server->run_signal_handler_id);
 170
 171   if (server->listener != NULL)
 172     g_object_unref (server->listener);
 173
 174   g_free (server->address);
 175   g_free (server->guid);
 176   g_free (server->client_address);
 177   if (server->nonce != NULL)
 178     {
 179       memset (server->nonce, '\0', 16);
 180       g_free (server->nonce);
 181     }
 182   /* we could unlink the nonce file but I don't
 183    * think it's really worth the effort/risk
 184    */
 185   g_free (server->nonce_file);
 186
 187   if (server->main_context_at_construction != NULL)
 188     g_main_context_unref (server->main_context_at_construction);
 189
 190   G_OBJECT_CLASS (g_dbus_server_parent_class)->finalize (object);
 191 }
 192
 193 static void
 194 g_dbus_server_get_property (GObject    *object,
 195                             guint       prop_id,
 196                             GValue     *value,
 197                             GParamSpec *pspec)
 198 {
 199   GDBusServer *server = G_DBUS_SERVER (object);
 200
 201   switch (prop_id)
 202     {
 203     case PROP_FLAGS:
 204       g_value_set_flags (value, server->flags);
 205       break;
 206
 207     case PROP_GUID:
 208       g_value_set_string (value, server->guid);
 209       break;
 210
 211     case PROP_ADDRESS:
 212       g_value_set_string (value, server->address);
 213       break;
 214
 215     case PROP_CLIENT_ADDRESS:
 216       g_value_set_string (value, server->client_address);
 217       break;
 218
 219     case PROP_ACTIVE:
 220       g_value_set_boolean (value, server->active);
 221       break;
 222
 223     case PROP_AUTHENTICATION_OBSERVER:
 224       g_value_set_object (value, server->authentication_observer);
 225       break;
 226
 227     default:
 228       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 229       break;
 230     }
 231 }
 232
 233 static void
 234 g_dbus_server_set_property (GObject      *object,
 235                             guint         prop_id,
 236                             const GValue *value,
 237                             GParamSpec   *pspec)
 238 {
 239   GDBusServer *server = G_DBUS_SERVER (object);
 240
 241   switch (prop_id)
 242     {
 243     case PROP_FLAGS:
 244       server->flags = g_value_get_flags (value);
 245       break;
 246
 247     case PROP_GUID:
 248       server->guid = g_value_dup_string (value);
 249       break;
 250
 251     case PROP_ADDRESS:
 252       server->address = g_value_dup_string (value);
 253       break;
 254
 255     case PROP_AUTHENTICATION_OBSERVER:
 256       server->authentication_observer = g_value_dup_object (value);
 257       break;
 258
 259     default:
 260       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 261       break;
 262     }
 263 }
 264
 265 static void
 266 g_dbus_server_class_init (GDBusServerClass *klass)
 267 {
 268   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 269
 270   gobject_class->finalize     = g_dbus_server_finalize;
 271   gobject_class->set_property = g_dbus_server_set_property;
 272   gobject_class->get_property = g_dbus_server_get_property;
 273
 274   /**
 275    * GDBusServer:flags:
 276    *
 277    * Flags from the #GDBusServerFlags enumeration.
 278    *
 279    * Since: 2.26
 280    */
 281   g_object_class_install_property (gobject_class,
 282                                    PROP_FLAGS,
 283                                    g_param_spec_flags ("flags",
 284                                                        P_("Flags"),
 285                                                        P_("Flags for the server"),
 286                                                        G_TYPE_DBUS_SERVER_FLAGS,
 287                                                        G_DBUS_SERVER_FLAGS_NONE,
 288                                                        G_PARAM_READABLE |
 289                                                        G_PARAM_WRITABLE |
 290                                                        G_PARAM_CONSTRUCT_ONLY |
 291                                                        G_PARAM_STATIC_NAME |
 292                                                        G_PARAM_STATIC_BLURB |
 293                                                        G_PARAM_STATIC_NICK));
 294
 295   /**
 296    * GDBusServer:guid:
 297    *
 298    * The guid of the server.
 299    *
 300    * Since: 2.26
 301    */
 302   g_object_class_install_property (gobject_class,
 303                                    PROP_GUID,
 304                                    g_param_spec_string ("guid",
 305                                                         P_("GUID"),
 306                                                         P_("The guid of the server"),
 307                                                         NULL,
 308                                                         G_PARAM_READABLE |
 309                                                         G_PARAM_WRITABLE |
 310                                                         G_PARAM_CONSTRUCT_ONLY |
 311                                                         G_PARAM_STATIC_NAME |
 312                                                         G_PARAM_STATIC_BLURB |
 313                                                         G_PARAM_STATIC_NICK));
 314
 315   /**
 316    * GDBusServer:address:
 317    *
 318    * The D-Bus address to listen on.
 319    *
 320    * Since: 2.26
 321    */
 322   g_object_class_install_property (gobject_class,
 323                                    PROP_ADDRESS,
 324                                    g_param_spec_string ("address",
 325                                                         P_("Address"),
 326                                                         P_("The address to listen on"),
 327                                                         NULL,
 328                                                         G_PARAM_READABLE |
 329                                                         G_PARAM_WRITABLE |
 330                                                         G_PARAM_CONSTRUCT_ONLY |
 331                                                         G_PARAM_STATIC_NAME |
 332                                                         G_PARAM_STATIC_BLURB |
 333                                                         G_PARAM_STATIC_NICK));
 334
 335   /**
 336    * GDBusServer:client-address:
 337    *
 338    * The D-Bus address that clients can use.
 339    *
 340    * Since: 2.26
 341    */
 342   g_object_class_install_property (gobject_class,
 343                                    PROP_CLIENT_ADDRESS,
 344                                    g_param_spec_string ("client-address",
 345                                                         P_("Client Address"),
 346                                                         P_("The address clients can use"),
 347                                                         NULL,
 348                                                         G_PARAM_READABLE |
 349                                                         G_PARAM_STATIC_NAME |
 350                                                         G_PARAM_STATIC_BLURB |
 351                                                         G_PARAM_STATIC_NICK));
 352
 353   /**
 354    * GDBusServer:active:
 355    *
 356    * Whether the server is currently active.
 357    *
 358    * Since: 2.26
 359    */
 360   g_object_class_install_property (gobject_class,
 361                                    PROP_ACTIVE,
 362                                    g_param_spec_boolean ("active",
 363                                                          P_("Active"),
 364                                                          P_("Whether the server is currently active"),
 365                                                          FALSE,
 366                                                          G_PARAM_READABLE |
 367                                                          G_PARAM_STATIC_NAME |
 368                                                          G_PARAM_STATIC_BLURB |
 369                                                          G_PARAM_STATIC_NICK));
 370
 371   /**
 372    * GDBusServer:authentication-observer:
 373    *
 374    * A #GDBusAuthObserver object to assist in the authentication process or %NULL.
 375    *
 376    * Since: 2.26
 377    */
 378   g_object_class_install_property (gobject_class,
 379                                    PROP_AUTHENTICATION_OBSERVER,
 380                                    g_param_spec_object ("authentication-observer",
 381                                                         P_("Authentication Observer"),
 382                                                         P_("Object used to assist in the authentication process"),
 383                                                         G_TYPE_DBUS_AUTH_OBSERVER,
 384                                                         G_PARAM_READABLE |
 385                                                         G_PARAM_WRITABLE |
 386                                                         G_PARAM_CONSTRUCT_ONLY |
 387                                                         G_PARAM_STATIC_NAME |
 388                                                         G_PARAM_STATIC_BLURB |
 389                                                         G_PARAM_STATIC_NICK));
 390
 391   /**
 392    * GDBusServer::new-connection:
 393    * @server: The #GDBusServer emitting the signal.
 394    * @connection: A #GDBusConnection for the new connection.
 395    *
 396    * Emitted when a new authenticated connection has been made. Use
 397    * g_dbus_connection_get_peer_credentials() to figure out what
 398    * identity (if any), was authenticated.
 399    *
 400    * If you want to accept the connection, take a reference to the
 401    * @connection object and return %TRUE. When you are done with the
 402    * connection call g_dbus_connection_close() and give up your
 403    * reference. Note that the other peer may disconnect at any time -
 404    * a typical thing to do when accepting a connection is to listen to
 405    * the #GDBusConnection::closed signal.
 406    *
 407    * If #GDBusServer:flags contains %G_DBUS_SERVER_FLAGS_RUN_IN_THREAD
 408    * then the signal is emitted in a new thread dedicated to the
 409    * connection. Otherwise the signal is emitted in the <link
 410    * linkend="g-main-context-push-thread-default">thread-default main
 411    * loop</link> of the thread that @server was constructed in.
 412    *
 413    * You are guaranteed that signal handlers for this signal runs
 414    * before incoming messages on @connection are processed. This means
 415    * that it's suitable to call g_dbus_connection_register_object() or
 416    * similar from the signal handler.
 417    *
 418    * Returns: %TRUE to claim @connection, %FALSE to let other handlers
 419    * run.
 420    *
 421    * Since: 2.26
 422    */
 423   _signals[NEW_CONNECTION_SIGNAL] = g_signal_new ("new-connection",
 424                                                   G_TYPE_DBUS_SERVER,
 425                                                   G_SIGNAL_RUN_LAST,
 426                                                   G_STRUCT_OFFSET (GDBusServerClass, new_connection),
 427                                                   g_signal_accumulator_true_handled,
 428                                                   NULL, /* accu_data */
 429                                                   _gio_marshal_BOOLEAN__OBJECT,
 430                                                   G_TYPE_BOOLEAN,
 431                                                   1,
 432                                                   G_TYPE_DBUS_CONNECTION);
 433 }
 434
 435 static void
 436 g_dbus_server_init (GDBusServer *server)
 437 {
 438   server->main_context_at_construction = g_main_context_get_thread_default ();
 439   if (server->main_context_at_construction != NULL)
 440     g_main_context_ref (server->main_context_at_construction);
 441 }
 442
 443 static gboolean
 444 on_run (GSocketService    *service,
 445         GSocketConnection *socket_connection,
 446         GObject           *source_object,
 447         gpointer           user_data);
 448
 449 /**
 450  * g_dbus_server_new_sync:
 451  * @address: A D-Bus address.
 452  * @flags: Flags from the #GDBusServerFlags enumeration.
 453  * @guid: A D-Bus GUID.
 454  * @observer: A #GDBusAuthObserver or %NULL.
 455  * @cancellable: A #GCancellable or %NULL.
 456  * @error: Return location for server or %NULL.
 457  *
 458  * Creates a new D-Bus server that listens on the first address in
 459  * @address that works.
 460  *
 461  * Once constructed, you can use g_dbus_server_get_client_address() to
 462  * get a D-Bus address string that clients can use to connect.
 463  *
 464  * Connect to the #GDBusServer::new-connection signal to handle
 465  * incoming connections.
 466  *
 467  * The returned #GDBusServer isn't active - you have to start it with
 468  * g_dbus_server_start().
 469  *
 470  * See <xref linkend="gdbus-peer-to-peer"/> for how #GDBusServer can
 471  * be used.
 472  *
 473  * This is a synchronous failable constructor. See
 474  * g_dbus_server_new() for the asynchronous version.
 475  *
 476  * Returns: A #GDBusServer or %NULL if @error is set. Free with
 477  * g_object_unref().
 478  *
 479  * Since: 2.26
 480  */
 481 GDBusServer *
 482 g_dbus_server_new_sync (const gchar        *address,
 483                         GDBusServerFlags    flags,
 484                         const gchar        *guid,
 485                         GDBusAuthObserver  *observer,
 486                         GCancellable       *cancellable,
 487                         GError            **error)
 488 {
 489   GDBusServer *server;
 490
 491   g_return_val_if_fail (address != NULL, NULL);
 492   g_return_val_if_fail (g_dbus_is_guid (guid), NULL);
 493   g_return_val_if_fail (error == NULL || *error == NULL, NULL);
 494
 495   server = g_initable_new (G_TYPE_DBUS_SERVER,
 496                            cancellable,
 497                            error,
 498                            "address", address,
 499                            "flags", flags,
 500                            "guid", guid,
 501                            "authentication-observer", observer,
 502                            NULL);
 503
 504   return server;
 505 }
 506
 507 /**
 508  * g_dbus_server_get_client_address:
 509  * @server: A #GDBusServer.
 510  *
 511  * Gets a D-Bus address string that can be used by clients to connect
 512  * to @server.
 513  *
 514  * Returns: A D-Bus address string. Do not free, the string is owned
 515  * by @server.
 516  *
 517  * Since: 2.26
 518  */
 519 const gchar *
 520 g_dbus_server_get_client_address (GDBusServer *server)
 521 {
 522   g_return_val_if_fail (G_IS_DBUS_SERVER (server), NULL);
 523   return server->client_address;
 524 }
 525
 526 /**
 527  * g_dbus_server_get_guid:
 528  * @server: A #GDBusServer.
 529  *
 530  * Gets the GUID for @server.
 531  *
 532  * Returns: A D-Bus GUID. Do not free this string, it is owned by @server.
 533  *
 534  * Since: 2.26
 535  */
 536 const gchar *
 537 g_dbus_server_get_guid (GDBusServer *server)
 538 {
 539   g_return_val_if_fail (G_IS_DBUS_SERVER (server), NULL);
 540   return server->guid;
 541 }
 542
 543 /**
 544  * g_dbus_server_get_flags:
 545  * @server: A #GDBusServer.
 546  *
 547  * Gets the flags for @server.
 548  *
 549  * Returns: A set of flags from the #GDBusServerFlags enumeration.
 550  *
 551  * Since: 2.26
 552  */
 553 GDBusServerFlags
 554 g_dbus_server_get_flags (GDBusServer *server)
 555 {
 556   g_return_val_if_fail (G_IS_DBUS_SERVER (server), G_DBUS_SERVER_FLAGS_NONE);
 557   return server->flags;
 558 }
 559
 560 /**
 561  * g_dbus_server_is_active:
 562  * @server: A #GDBusServer.
 563  *
 564  * Gets whether @server is active.
 565  *
 566  * Returns: %TRUE if server is active, %FALSE otherwise.
 567  *
 568  * Since: 2.26
 569  */
 570 gboolean
 571 g_dbus_server_is_active (GDBusServer *server)
 572 {
 573   g_return_val_if_fail (G_IS_DBUS_SERVER (server), G_DBUS_SERVER_FLAGS_NONE);
 574   return server->active;
 575 }
 576
 577 /**
 578  * g_dbus_server_start:
 579  * @server: A #GDBusServer.
 580  *
 581  * Starts @server.
 582  *
 583  * Since: 2.26
 584  */
 585 void
 586 g_dbus_server_start (GDBusServer *server)
 587 {
 588   g_return_if_fail (G_IS_DBUS_SERVER (server));
 589   if (server->active)
 590     return;
 591   /* Right now we don't have any transport not using the listener... */
 592   g_assert (server->is_using_listener);
 593   g_socket_service_start (G_SOCKET_SERVICE (server->listener));
 594   server->active = TRUE;
 595   g_object_notify (G_OBJECT (server), "active");
 596 }
 597
 598 /**
 599  * g_dbus_server_stop:
 600  * @server: A #GDBusServer.
 601  *
 602  * Stops @server.
 603  *
 604  * Since: 2.26
 605  */
 606 void
 607 g_dbus_server_stop (GDBusServer *server)
 608 {
 609   g_return_if_fail (G_IS_DBUS_SERVER (server));
 610   if (!server->active)
 611     return;
 612   /* Right now we don't have any transport not using the listener... */
 613   g_assert (server->is_using_listener);
 614   g_assert (server->run_signal_handler_id > 0);
 615   g_signal_handler_disconnect (server->listener, server->run_signal_handler_id);
 616   server->run_signal_handler_id = 0;
 617   g_socket_service_stop (G_SOCKET_SERVICE (server->listener));
 618   server->active = FALSE;
 619   g_object_notify (G_OBJECT (server), "active");
 620 }
 621
 622 /* ---------------------------------------------------------------------------------------------------- */
 623
 624 #ifdef G_OS_UNIX
 625
 626 static gint
 627 random_ascii (void)
 628 {
 629   gint ret;
 630   ret = g_random_int_range (0, 60);
 631   if (ret < 25)
 632     ret += 'A';
 633   else if (ret < 50)
 634     ret += 'a' - 25;
 635   else
 636     ret += '0' - 50;
 637   return ret;
 638 }
 639
 640 /* note that address_entry has already been validated => exactly one of path, tmpdir or abstract keys are set */
 641 static gboolean
 642 try_unix (GDBusServer  *server,
 643           const gchar  *address_entry,
 644           GHashTable   *key_value_pairs,
 645           GError      **error)
 646 {
 647   gboolean ret;
 648   const gchar *path;
 649   const gchar *tmpdir;
 650   const gchar *abstract;
 651   GSocketAddress *address;
 652
 653   ret = FALSE;
 654   address = NULL;
 655
 656   path = g_hash_table_lookup (key_value_pairs, "path");
 657   tmpdir = g_hash_table_lookup (key_value_pairs, "tmpdir");
 658   abstract = g_hash_table_lookup (key_value_pairs, "abstract");
 659
 660   if (path != NULL)
 661     {
 662       address = g_unix_socket_address_new (path);
 663     }
 664   else if (tmpdir != NULL)
 665     {
 666       gint n;
 667       GString *s;
 668       GError *local_error;
 669
 670     retry:
 671       s = g_string_new (tmpdir);
 672       g_string_append (s, "/dbus-");
 673       for (n = 0; n < 8; n++)
 674         g_string_append_c (s, random_ascii ());
 675
 676       /* prefer abstract namespace if available */
 677       if (g_unix_socket_address_abstract_names_supported ())
 678         address = g_unix_socket_address_new_with_type (s->str,
 679                                                        -1,
 680                                                        G_UNIX_SOCKET_ADDRESS_ABSTRACT);
 681       else
 682         address = g_unix_socket_address_new (s->str);
 683       g_string_free (s, TRUE);
 684
 685       local_error = NULL;
 686       if (!g_socket_listener_add_address (server->listener,
 687                                           address,
 688                                           G_SOCKET_TYPE_STREAM,
 689                                           G_SOCKET_PROTOCOL_DEFAULT,
 690                                           NULL, /* source_object */
 691                                           NULL, /* effective_address */
 692                                           &local_error))
 693         {
 694           if (local_error->domain == G_IO_ERROR && local_error->code == G_IO_ERROR_ADDRESS_IN_USE)
 695             {
 696               g_error_free (local_error);
 697               goto retry;
 698             }
 699           g_propagate_error (error, local_error);
 700           goto out;
 701         }
 702       ret = TRUE;
 703       goto out;
 704     }
 705   else if (abstract != NULL)
 706     {
 707       if (!g_unix_socket_address_abstract_names_supported ())
 708         {
 709           g_set_error_literal (error,
 710                                G_IO_ERROR,
 711                                G_IO_ERROR_NOT_SUPPORTED,
 712                                _("Abstract name space not supported"));
 713           goto out;
 714         }
 715       address = g_unix_socket_address_new_with_type (abstract,
 716                                                      -1,
 717                                                      G_UNIX_SOCKET_ADDRESS_ABSTRACT);
 718     }
 719   else
 720     {
 721       g_assert_not_reached ();
 722     }
 723
 724   if (!g_socket_listener_add_address (server->listener,
 725                                       address,
 726                                       G_SOCKET_TYPE_STREAM,
 727                                       G_SOCKET_PROTOCOL_DEFAULT,
 728                                       NULL, /* source_object */
 729                                       NULL, /* effective_address */
 730                                       error))
 731     goto out;
 732
 733   ret = TRUE;
 734
 735  out:
 736
 737   if (address != NULL)
 738     {
 739       /* Fill out client_address if the connection attempt worked */
 740       if (ret)
 741         {
 742           server->is_using_listener = TRUE;
 743
 744           switch (g_unix_socket_address_get_address_type (G_UNIX_SOCKET_ADDRESS (address)))
 745             {
 746             case G_UNIX_SOCKET_ADDRESS_ABSTRACT:
 747               server->client_address = g_strdup_printf ("unix:abstract=%s",
 748                                                         g_unix_socket_address_get_path (G_UNIX_SOCKET_ADDRESS (address)));
 749               break;
 750
 751             case G_UNIX_SOCKET_ADDRESS_PATH:
 752               server->client_address = g_strdup_printf ("unix:path=%s",
 753                                                         g_unix_socket_address_get_path (G_UNIX_SOCKET_ADDRESS (address)));
 754               break;
 755
 756             default:
 757               g_assert_not_reached ();
 758               break;
 759             }
 760         }
 761       g_object_unref (address);
 762     }
 763   return ret;
 764 }
 765 #endif
 766
 767 /* ---------------------------------------------------------------------------------------------------- */
 768
 769 /* note that address_entry has already been validated =>
 770  *  both host and port (guranteed to be a number in [0, 65535]) are set (family is optional)
 771  */
 772 static gboolean
 773 try_tcp (GDBusServer  *server,
 774          const gchar  *address_entry,
 775          GHashTable   *key_value_pairs,
 776          gboolean      do_nonce,
 777          GError      **error)
 778 {
 779   gboolean ret;
 780   const gchar *host;
 781   const gchar *port;
 782   gint port_num;
 783   GResolver *resolver;
 784   GList *resolved_addresses;
 785   GList *l;
 786
 787   ret = FALSE;
 788   resolver = NULL;
 789   resolved_addresses = NULL;
 790
 791   host = g_hash_table_lookup (key_value_pairs, "host");
 792   port = g_hash_table_lookup (key_value_pairs, "port");
 793   /* family = g_hash_table_lookup (key_value_pairs, "family"); */
 794   if (g_hash_table_lookup (key_value_pairs, "noncefile") != NULL)
 795     {
 796       g_set_error_literal (error,
 797                            G_IO_ERROR,
 798                            G_IO_ERROR_INVALID_ARGUMENT,
 799                            _("Cannot specify nonce file when creating a server"));
 800       goto out;
 801     }
 802
 803   if (host == NULL)
 804     host = "localhost";
 805   if (port == NULL)
 806     port = "0";
 807   port_num = strtol (port, NULL, 10);
 808
 809   resolver = g_resolver_get_default ();
 810   resolved_addresses = g_resolver_lookup_by_name (resolver,
 811                                                   host,
 812                                                   NULL,
 813                                                   error);
 814   if (resolved_addresses == NULL)
 815     goto out;
 816
 817   /* TODO: handle family */
 818   for (l = resolved_addresses; l != NULL; l = l->next)
 819     {
 820       GInetAddress *address = G_INET_ADDRESS (l->data);
 821       GSocketAddress *socket_address;
 822       GSocketAddress *effective_address;
 823
 824       socket_address = g_inet_socket_address_new (address, port_num);
 825       if (!g_socket_listener_add_address (server->listener,
 826                                           socket_address,
 827                                           G_SOCKET_TYPE_STREAM,
 828                                           G_SOCKET_PROTOCOL_TCP,
 829                                           NULL, /* GObject *source_object */
 830                                           &effective_address,
 831                                           error))
 832         {
 833           g_object_unref (socket_address);
 834           goto out;
 835         }
 836       if (port_num == 0)
 837         /* make sure we allocate the same port number for other listeners */
 838         port_num = g_inet_socket_address_get_port (G_INET_SOCKET_ADDRESS (effective_address));
 839
 840       g_object_unref (effective_address);
 841       g_object_unref (socket_address);
 842     }
 843
 844   if (do_nonce)
 845     {
 846       gint fd;
 847       guint n;
 848       gsize bytes_written;
 849       gsize bytes_remaining;
 850
 851       server->nonce = g_new0 (guchar, 16);
 852       for (n = 0; n < 16; n++)
 853         server->nonce[n] = g_random_int_range (0, 256);
 854       fd = g_file_open_tmp ("gdbus-nonce-file-XXXXXX",
 855                             &server->nonce_file,
 856                             error);
 857       if (fd == -1)
 858         {
 859           g_socket_listener_close (server->listener);
 860           goto out;
 861         }
 862     again:
 863       bytes_written = 0;
 864       bytes_remaining = 16;
 865       while (bytes_remaining > 0)
 866         {
 867           gssize ret;
 868           ret = write (fd, server->nonce + bytes_written, bytes_remaining);
 869           if (ret == -1)
 870             {
 871               if (errno == EINTR)
 872                 goto again;
 873               g_set_error (error,
 874                            G_IO_ERROR,
 875                            g_io_error_from_errno (errno),
 876                            _("Error writing nonce file at `%s': %s"),
 877                            server->nonce_file,
 878                            strerror (errno));
 879               goto out;
 880             }
 881           bytes_written += ret;
 882           bytes_remaining -= ret;
 883         }
 884       close (fd);
 885       server->client_address = g_strdup_printf ("nonce-tcp:host=%s,port=%d,noncefile=%s",
 886                                                 host,
 887                                                 port_num,
 888                                                 server->nonce_file);
 889     }
 890   else
 891     {
 892       server->client_address = g_strdup_printf ("tcp:host=%s,port=%d", host, port_num);
 893     }
 894   server->is_using_listener = TRUE;
 895   ret = TRUE;
 896
 897  out:
 898   g_list_foreach (resolved_addresses, (GFunc) g_object_unref, NULL);
 899   g_list_free (resolved_addresses);
 900   g_object_unref (resolver);
 901   return ret;
 902 }
 903
 904 /* ---------------------------------------------------------------------------------------------------- */
 905
 906 typedef struct
 907 {
 908   GDBusServer *server;
 909   GDBusConnection *connection;
 910 } EmitIdleData;
 911
 912 static void
 913 emit_idle_data_free (EmitIdleData *data)
 914 {
 915   g_object_unref (data->server);
 916   g_object_unref (data->connection);
 917   g_free (data);
 918 }
 919
 920 static gboolean
 921 emit_new_connection_in_idle (gpointer user_data)
 922 {
 923   EmitIdleData *data = user_data;
 924   gboolean claimed;
 925
 926   claimed = FALSE;
 927   g_signal_emit (data->server,
 928                  _signals[NEW_CONNECTION_SIGNAL],
 929                  0,
 930                  data->connection,
 931                  &claimed);
 932
 933   if (claimed)
 934     g_dbus_connection_start_message_processing (data->connection);
 935   g_object_unref (data->connection);
 936
 937   return FALSE;
 938 }
 939
 940 /* Called in new thread */
 941 static gboolean
 942 on_run (GSocketService    *service,
 943         GSocketConnection *socket_connection,
 944         GObject           *source_object,
 945         gpointer           user_data)
 946 {
 947   GDBusServer *server = G_DBUS_SERVER (user_data);
 948   GDBusConnection *connection;
 949   GDBusConnectionFlags connection_flags;
 950
 951   if (server->nonce != NULL)
 952     {
 953       gchar buf[16];
 954       gsize bytes_read;
 955
 956       if (!g_input_stream_read_all (g_io_stream_get_input_stream (G_IO_STREAM (socket_connection)),
 957                                     buf,
 958                                     16,
 959                                     &bytes_read,
 960                                     NULL,  /* GCancellable */
 961                                     NULL)) /* GError */
 962         goto out;
 963
 964       if (bytes_read != 16)
 965         goto out;
 966
 967       if (memcmp (buf, server->nonce, 16) != 0)
 968         goto out;
 969     }
 970
 971   connection_flags =
 972     G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER |
 973     G_DBUS_CONNECTION_FLAGS_DELAY_MESSAGE_PROCESSING;
 974   if (server->flags & G_DBUS_SERVER_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS)
 975     connection_flags |= G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS;
 976
 977   connection = g_dbus_connection_new_sync (G_IO_STREAM (socket_connection),
 978                                            server->guid,
 979                                            connection_flags,
 980                                            server->authentication_observer,
 981                                            NULL,  /* GCancellable */
 982                                            NULL); /* GError */
 983   if (connection == NULL)
 984       goto out;
 985
 986   if (server->flags & G_DBUS_SERVER_FLAGS_RUN_IN_THREAD)
 987     {
 988       gboolean claimed;
 989
 990       claimed = FALSE;
 991       g_signal_emit (server,
 992                      _signals[NEW_CONNECTION_SIGNAL],
 993                      0,
 994                      connection,
 995                      &claimed);
 996       if (claimed)
 997         g_dbus_connection_start_message_processing (connection);
 998       g_object_unref (connection);
 999     }
1000   else
1001     {
1002       GSource *idle_source;
1003       EmitIdleData *data;
1004
1005       data = g_new0 (EmitIdleData, 1);
1006       data->server = g_object_ref (server);
1007       data->connection = g_object_ref (connection);
1008
1009       idle_source = g_idle_source_new ();
1010       g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
1011       g_source_set_callback (idle_source,
1012                              emit_new_connection_in_idle,
1013                              data,
1014                              (GDestroyNotify) emit_idle_data_free);
1015       g_source_attach (idle_source, server->main_context_at_construction);
1016       g_source_unref (idle_source);
1017     }
1018
1019  out:
1020   return TRUE;
1021 }
1022
1023 static gboolean
1024 initable_init (GInitable     *initable,
1025                GCancellable  *cancellable,
1026                GError       **error)
1027 {
1028   GDBusServer *server = G_DBUS_SERVER (initable);
1029   gboolean ret;
1030   guint n;
1031   gchar **addr_array;
1032   GError *last_error;
1033
1034   ret = FALSE;
1035   addr_array = NULL;
1036   last_error = NULL;
1037
1038   if (!g_dbus_is_guid (server->guid))
1039     {
1040       g_set_error (&last_error,
1041                    G_IO_ERROR,
1042                    G_IO_ERROR_INVALID_ARGUMENT,
1043                    _("The string `%s' is not a valid D-Bus GUID"),
1044                    server->guid);
1045       goto out;
1046     }
1047
1048   server->listener = G_SOCKET_LISTENER (g_threaded_socket_service_new (-1));
1049
1050   addr_array = g_strsplit (server->address, ";", 0);
1051   last_error = NULL;
1052   for (n = 0; addr_array != NULL && addr_array[n] != NULL; n++)
1053     {
1054       const gchar *address_entry = addr_array[n];
1055       GHashTable *key_value_pairs;
1056       gchar *transport_name;
1057       GError *this_error;
1058
1059       this_error = NULL;
1060       if (g_dbus_is_supported_address (address_entry,
1061                                        &this_error) &&
1062           _g_dbus_address_parse_entry (address_entry,
1063                                        &transport_name,
1064                                        &key_value_pairs,
1065                                        &this_error))
1066         {
1067
1068           if (FALSE)
1069             {
1070             }
1071 #ifdef G_OS_UNIX
1072           else if (g_strcmp0 (transport_name, "unix") == 0)
1073             ret = try_unix (server, address_entry, key_value_pairs, &this_error);
1074 #endif
1075           else if (g_strcmp0 (transport_name, "tcp") == 0)
1076             ret = try_tcp (server, address_entry, key_value_pairs, FALSE, &this_error);
1077           else if (g_strcmp0 (transport_name, "nonce-tcp") == 0)
1078             ret = try_tcp (server, address_entry, key_value_pairs, TRUE, &this_error);
1079           else
1080             g_set_error (&this_error,
1081                          G_IO_ERROR,
1082                          G_IO_ERROR_INVALID_ARGUMENT,
1083                          _("Cannot listen on unsupported transport `%s'"),
1084                          transport_name);
1085
1086           g_free (transport_name);
1087           if (key_value_pairs != NULL)
1088             g_hash_table_unref (key_value_pairs);
1089
1090           if (ret)
1091             {
1092               g_assert (this_error == NULL);
1093               goto out;
1094             }
1095         }
1096
1097       if (this_error != NULL)
1098         {
1099           if (last_error != NULL)
1100             g_error_free (last_error);
1101           last_error = this_error;
1102         }
1103     }
1104
1105  out:
1106
1107   g_strfreev (addr_array);
1108
1109   if (ret)
1110     {
1111       if (last_error != NULL)
1112         g_error_free (last_error);
1113
1114       /* Right now we don't have any transport not using the listener... */
1115       g_assert (server->is_using_listener);
1116       server->run_signal_handler_id = g_signal_connect (G_SOCKET_SERVICE (server->listener),
1117                                                         "run",
1118                                                         G_CALLBACK (on_run),
1119                                                         server);
1120     }
1121   else
1122     {
1123       g_assert (last_error != NULL);
1124       g_propagate_error (error, last_error);
1125     }
1126   return ret;
1127 }
1128
1129
1130 static void
1131 initable_iface_init (GInitableIface *initable_iface)
1132 {
1133   initable_iface->init = initable_init;
1134 }
1135
1136 /* ---------------------------------------------------------------------------------------------------- */