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