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 2.1 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, see <http://www.gnu.org/licenses/>.
  17  *
  18  * Author: David Zeuthen <davidz@redhat.com>
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <errno.h>
  26
  27 #include "giotypes.h"
  28 #include "gioerror.h"
  29 #include "gdbusaddress.h"
  30 #include "gdbusutils.h"
  31 #include "gdbusconnection.h"
  32 #include "gdbusserver.h"
  33 #include "gioenumtypes.h"
  34 #include "gdbusprivate.h"
  35 #include "gdbusauthobserver.h"
  36 #include "ginitable.h"
  37 #include "gsocketservice.h"
  38 #include "gthreadedsocketservice.h"
  39 #include "gresolver.h"
  40 #include "glib/gstdio.h"
  41 #include "ginetaddress.h"
  42 #include "ginetsocketaddress.h"
  43 #include "ginputstream.h"
  44 #include "giostream.h"
  45
  46 #ifdef G_OS_UNIX
  47 #include <unistd.h>
  48 #endif
  49 #ifdef G_OS_WIN32
  50 #include <io.h>
  51 #endif
  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  * An example of peer-to-peer communication with G-DBus can be found
  74  * in [gdbus-example-peer.c](https://git.gnome.org/browse/glib/tree/gio/tests/gdbus-example-peer.c).
  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_ref_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 static 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 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   g_main_context_unref (server->main_context_at_construction);
 187
 188   G_OBJECT_CLASS (g_dbus_server_parent_class)->finalize (object);
 189 }
 190
 191 static void
 192 g_dbus_server_get_property (GObject    *object,
 193                             guint       prop_id,
 194                             GValue     *value,
 195                             GParamSpec *pspec)
 196 {
 197   GDBusServer *server = G_DBUS_SERVER (object);
 198
 199   switch (prop_id)
 200     {
 201     case PROP_FLAGS:
 202       g_value_set_flags (value, server->flags);
 203       break;
 204
 205     case PROP_GUID:
 206       g_value_set_string (value, server->guid);
 207       break;
 208
 209     case PROP_ADDRESS:
 210       g_value_set_string (value, server->address);
 211       break;
 212
 213     case PROP_CLIENT_ADDRESS:
 214       g_value_set_string (value, server->client_address);
 215       break;
 216
 217     case PROP_ACTIVE:
 218       g_value_set_boolean (value, server->active);
 219       break;
 220
 221     case PROP_AUTHENTICATION_OBSERVER:
 222       g_value_set_object (value, server->authentication_observer);
 223       break;
 224
 225     default:
 226       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 227       break;
 228     }
 229 }
 230
 231 static void
 232 g_dbus_server_set_property (GObject      *object,
 233                             guint         prop_id,
 234                             const GValue *value,
 235                             GParamSpec   *pspec)
 236 {
 237   GDBusServer *server = G_DBUS_SERVER (object);
 238
 239   switch (prop_id)
 240     {
 241     case PROP_FLAGS:
 242       server->flags = g_value_get_flags (value);
 243       break;
 244
 245     case PROP_GUID:
 246       server->guid = g_value_dup_string (value);
 247       break;
 248
 249     case PROP_ADDRESS:
 250       server->address = g_value_dup_string (value);
 251       break;
 252
 253     case PROP_AUTHENTICATION_OBSERVER:
 254       server->authentication_observer = g_value_dup_object (value);
 255       break;
 256
 257     default:
 258       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 259       break;
 260     }
 261 }
 262
 263 static void
 264 g_dbus_server_class_init (GDBusServerClass *klass)
 265 {
 266   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 267
 268   gobject_class->finalize     = g_dbus_server_finalize;
 269   gobject_class->set_property = g_dbus_server_set_property;
 270   gobject_class->get_property = g_dbus_server_get_property;
 271
 272   /**
 273    * GDBusServer:flags:
 274    *
 275    * Flags from the #GDBusServerFlags enumeration.
 276    *
 277    * Since: 2.26
 278    */
 279   g_object_class_install_property (gobject_class,
 280                                    PROP_FLAGS,
 281                                    g_param_spec_flags ("flags",
 282                                                        P_("Flags"),
 283                                                        P_("Flags for the server"),
 284                                                        G_TYPE_DBUS_SERVER_FLAGS,
 285                                                        G_DBUS_SERVER_FLAGS_NONE,
 286                                                        G_PARAM_READABLE |
 287                                                        G_PARAM_WRITABLE |
 288                                                        G_PARAM_CONSTRUCT_ONLY |
 289                                                        G_PARAM_STATIC_NAME |
 290                                                        G_PARAM_STATIC_BLURB |
 291                                                        G_PARAM_STATIC_NICK));
 292
 293   /**
 294    * GDBusServer:guid:
 295    *
 296    * The guid of the server.
 297    *
 298    * Since: 2.26
 299    */
 300   g_object_class_install_property (gobject_class,
 301                                    PROP_GUID,
 302                                    g_param_spec_string ("guid",
 303                                                         P_("GUID"),
 304                                                         P_("The guid of the server"),
 305                                                         NULL,
 306                                                         G_PARAM_READABLE |
 307                                                         G_PARAM_WRITABLE |
 308                                                         G_PARAM_CONSTRUCT_ONLY |
 309                                                         G_PARAM_STATIC_NAME |
 310                                                         G_PARAM_STATIC_BLURB |
 311                                                         G_PARAM_STATIC_NICK));
 312
 313   /**
 314    * GDBusServer:address:
 315    *
 316    * The D-Bus address to listen on.
 317    *
 318    * Since: 2.26
 319    */
 320   g_object_class_install_property (gobject_class,
 321                                    PROP_ADDRESS,
 322                                    g_param_spec_string ("address",
 323                                                         P_("Address"),
 324                                                         P_("The address to listen on"),
 325                                                         NULL,
 326                                                         G_PARAM_READABLE |
 327                                                         G_PARAM_WRITABLE |
 328                                                         G_PARAM_CONSTRUCT_ONLY |
 329                                                         G_PARAM_STATIC_NAME |
 330                                                         G_PARAM_STATIC_BLURB |
 331                                                         G_PARAM_STATIC_NICK));
 332
 333   /**
 334    * GDBusServer:client-address:
 335    *
 336    * The D-Bus address that clients can use.
 337    *
 338    * Since: 2.26
 339    */
 340   g_object_class_install_property (gobject_class,
 341                                    PROP_CLIENT_ADDRESS,
 342                                    g_param_spec_string ("client-address",
 343                                                         P_("Client Address"),
 344                                                         P_("The address clients can use"),
 345                                                         NULL,
 346                                                         G_PARAM_READABLE |
 347                                                         G_PARAM_STATIC_NAME |
 348                                                         G_PARAM_STATIC_BLURB |
 349                                                         G_PARAM_STATIC_NICK));
 350
 351   /**
 352    * GDBusServer:active:
 353    *
 354    * Whether the server is currently active.
 355    *
 356    * Since: 2.26
 357    */
 358   g_object_class_install_property (gobject_class,
 359                                    PROP_ACTIVE,
 360                                    g_param_spec_boolean ("active",
 361                                                          P_("Active"),
 362                                                          P_("Whether the server is currently active"),
 363                                                          FALSE,
 364                                                          G_PARAM_READABLE |
 365                                                          G_PARAM_STATIC_NAME |
 366                                                          G_PARAM_STATIC_BLURB |
 367                                                          G_PARAM_STATIC_NICK));
 368
 369   /**
 370    * GDBusServer:authentication-observer:
 371    *
 372    * A #GDBusAuthObserver object to assist in the authentication process or %NULL.
 373    *
 374    * Since: 2.26
 375    */
 376   g_object_class_install_property (gobject_class,
 377                                    PROP_AUTHENTICATION_OBSERVER,
 378                                    g_param_spec_object ("authentication-observer",
 379                                                         P_("Authentication Observer"),
 380                                                         P_("Object used to assist in the authentication process"),
 381                                                         G_TYPE_DBUS_AUTH_OBSERVER,
 382                                                         G_PARAM_READABLE |
 383                                                         G_PARAM_WRITABLE |
 384                                                         G_PARAM_CONSTRUCT_ONLY |
 385                                                         G_PARAM_STATIC_NAME |
 386                                                         G_PARAM_STATIC_BLURB |
 387                                                         G_PARAM_STATIC_NICK));
 388
 389   /**
 390    * GDBusServer::new-connection:
 391    * @server: The #GDBusServer emitting the signal.
 392    * @connection: A #GDBusConnection for the new connection.
 393    *
 394    * Emitted when a new authenticated connection has been made. Use
 395    * g_dbus_connection_get_peer_credentials() to figure out what
 396    * identity (if any), was authenticated.
 397    *
 398    * If you want to accept the connection, take a reference to the
 399    * @connection object and return %TRUE. When you are done with the
 400    * connection call g_dbus_connection_close() and give up your
 401    * reference. Note that the other peer may disconnect at any time -
 402    * a typical thing to do when accepting a connection is to listen to
 403    * the #GDBusConnection::closed signal.
 404    *
 405    * If #GDBusServer:flags contains %G_DBUS_SERVER_FLAGS_RUN_IN_THREAD
 406    * then the signal is emitted in a new thread dedicated to the
 407    * connection. Otherwise the signal is emitted in the
 408    * [thread-default main context][g-main-context-push-thread-default]
 409    * of the thread that @server was constructed in.
 410    *
 411    * You are guaranteed that signal handlers for this signal runs
 412    * before incoming messages on @connection are processed. This means
 413    * that it's suitable to call g_dbus_connection_register_object() or
 414    * similar from the signal handler.
 415    *
 416    * Returns: %TRUE to claim @connection, %FALSE to let other handlers
 417    * run.
 418    *
 419    * Since: 2.26
 420    */
 421   _signals[NEW_CONNECTION_SIGNAL] = g_signal_new (I_("new-connection"),
 422                                                   G_TYPE_DBUS_SERVER,
 423                                                   G_SIGNAL_RUN_LAST,
 424                                                   G_STRUCT_OFFSET (GDBusServerClass, new_connection),
 425                                                   g_signal_accumulator_true_handled,
 426                                                   NULL, /* accu_data */
 427                                                   NULL,
 428                                                   G_TYPE_BOOLEAN,
 429                                                   1,
 430                                                   G_TYPE_DBUS_CONNECTION);
 431 }
 432
 433 static void
 434 g_dbus_server_init (GDBusServer *server)
 435 {
 436   server->main_context_at_construction = g_main_context_ref_thread_default ();
 437 }
 438
 439 static gboolean
 440 on_run (GSocketService    *service,
 441         GSocketConnection *socket_connection,
 442         GObject           *source_object,
 443         gpointer           user_data);
 444
 445 /**
 446  * g_dbus_server_new_sync:
 447  * @address: A D-Bus address.
 448  * @flags: Flags from the #GDBusServerFlags enumeration.
 449  * @guid: A D-Bus GUID.
 450  * @observer: (nullable): A #GDBusAuthObserver or %NULL.
 451  * @cancellable: (nullable): A #GCancellable or %NULL.
 452  * @error: Return location for server or %NULL.
 453  *
 454  * Creates a new D-Bus server that listens on the first address in
 455  * @address that works.
 456  *
 457  * Once constructed, you can use g_dbus_server_get_client_address() to
 458  * get a D-Bus address string that clients can use to connect.
 459  *
 460  * Connect to the #GDBusServer::new-connection signal to handle
 461  * incoming connections.
 462  *
 463  * The returned #GDBusServer isn't active - you have to start it with
 464  * g_dbus_server_start().
 465  *
 466  * #GDBusServer is used in this [example][gdbus-peer-to-peer].
 467  *
 468  * This is a synchronous failable constructor. See
 469  * g_dbus_server_new() for the asynchronous version.
 470  *
 471  * Returns: A #GDBusServer or %NULL if @error is set. Free with
 472  * g_object_unref().
 473  *
 474  * Since: 2.26
 475  */
 476 GDBusServer *
 477 g_dbus_server_new_sync (const gchar        *address,
 478                         GDBusServerFlags    flags,
 479                         const gchar        *guid,
 480                         GDBusAuthObserver  *observer,
 481                         GCancellable       *cancellable,
 482                         GError            **error)
 483 {
 484   GDBusServer *server;
 485
 486   g_return_val_if_fail (address != NULL, NULL);
 487   g_return_val_if_fail (g_dbus_is_guid (guid), NULL);
 488   g_return_val_if_fail (error == NULL || *error == NULL, NULL);
 489
 490   server = g_initable_new (G_TYPE_DBUS_SERVER,
 491                            cancellable,
 492                            error,
 493                            "address", address,
 494                            "flags", flags,
 495                            "guid", guid,
 496                            "authentication-observer", observer,
 497                            NULL);
 498
 499   return server;
 500 }
 501
 502 /**
 503  * g_dbus_server_get_client_address:
 504  * @server: A #GDBusServer.
 505  *
 506  * Gets a
 507  * [D-Bus address](https://dbus.freedesktop.org/doc/dbus-specification.html#addresses)
 508  * string that can be used by clients to connect to @server.
 509  *
 510  * Returns: A D-Bus address string. Do not free, the string is owned
 511  * by @server.
 512  *
 513  * Since: 2.26
 514  */
 515 const gchar *
 516 g_dbus_server_get_client_address (GDBusServer *server)
 517 {
 518   g_return_val_if_fail (G_IS_DBUS_SERVER (server), NULL);
 519   return server->client_address;
 520 }
 521
 522 /**
 523  * g_dbus_server_get_guid:
 524  * @server: A #GDBusServer.
 525  *
 526  * Gets the GUID for @server.
 527  *
 528  * Returns: A D-Bus GUID. Do not free this string, it is owned by @server.
 529  *
 530  * Since: 2.26
 531  */
 532 const gchar *
 533 g_dbus_server_get_guid (GDBusServer *server)
 534 {
 535   g_return_val_if_fail (G_IS_DBUS_SERVER (server), NULL);
 536   return server->guid;
 537 }
 538
 539 /**
 540  * g_dbus_server_get_flags:
 541  * @server: A #GDBusServer.
 542  *
 543  * Gets the flags for @server.
 544  *
 545  * Returns: A set of flags from the #GDBusServerFlags enumeration.
 546  *
 547  * Since: 2.26
 548  */
 549 GDBusServerFlags
 550 g_dbus_server_get_flags (GDBusServer *server)
 551 {
 552   g_return_val_if_fail (G_IS_DBUS_SERVER (server), G_DBUS_SERVER_FLAGS_NONE);
 553   return server->flags;
 554 }
 555
 556 /**
 557  * g_dbus_server_is_active:
 558  * @server: A #GDBusServer.
 559  *
 560  * Gets whether @server is active.
 561  *
 562  * Returns: %TRUE if server is active, %FALSE otherwise.
 563  *
 564  * Since: 2.26
 565  */
 566 gboolean
 567 g_dbus_server_is_active (GDBusServer *server)
 568 {
 569   g_return_val_if_fail (G_IS_DBUS_SERVER (server), G_DBUS_SERVER_FLAGS_NONE);
 570   return server->active;
 571 }
 572
 573 /**
 574  * g_dbus_server_start:
 575  * @server: A #GDBusServer.
 576  *
 577  * Starts @server.
 578  *
 579  * Since: 2.26
 580  */
 581 void
 582 g_dbus_server_start (GDBusServer *server)
 583 {
 584   g_return_if_fail (G_IS_DBUS_SERVER (server));
 585   if (server->active)
 586     return;
 587   /* Right now we don't have any transport not using the listener... */
 588   g_assert (server->is_using_listener);
 589   g_socket_service_start (G_SOCKET_SERVICE (server->listener));
 590   server->active = TRUE;
 591   g_object_notify (G_OBJECT (server), "active");
 592 }
 593
 594 /**
 595  * g_dbus_server_stop:
 596  * @server: A #GDBusServer.
 597  *
 598  * Stops @server.
 599  *
 600  * Since: 2.26
 601  */
 602 void
 603 g_dbus_server_stop (GDBusServer *server)
 604 {
 605   g_return_if_fail (G_IS_DBUS_SERVER (server));
 606   if (!server->active)
 607     return;
 608   /* Right now we don't have any transport not using the listener... */
 609   g_assert (server->is_using_listener);
 610   g_assert (server->run_signal_handler_id > 0);
 611   g_signal_handler_disconnect (server->listener, server->run_signal_handler_id);
 612   server->run_signal_handler_id = 0;
 613   g_socket_service_stop (G_SOCKET_SERVICE (server->listener));
 614   server->active = FALSE;
 615   g_object_notify (G_OBJECT (server), "active");
 616 }
 617
 618 /* ---------------------------------------------------------------------------------------------------- */
 619
 620 #ifdef G_OS_UNIX
 621
 622 static gint
 623 random_ascii (void)
 624 {
 625   gint ret;
 626   ret = g_random_int_range (0, 60);
 627   if (ret < 25)
 628     ret += 'A';
 629   else if (ret < 50)
 630     ret += 'a' - 25;
 631   else
 632     ret += '0' - 50;
 633   return ret;
 634 }
 635
 636 /* note that address_entry has already been validated => exactly one of path, tmpdir or abstract keys are set */
 637 static gboolean
 638 try_unix (GDBusServer  *server,
 639           const gchar  *address_entry,
 640           GHashTable   *key_value_pairs,
 641           GError      **error)
 642 {
 643   gboolean ret;
 644   const gchar *path;
 645   const gchar *tmpdir;
 646   const gchar *abstract;
 647   GSocketAddress *address;
 648
 649   ret = FALSE;
 650   address = NULL;
 651
 652   path = g_hash_table_lookup (key_value_pairs, "path");
 653   tmpdir = g_hash_table_lookup (key_value_pairs, "tmpdir");
 654   abstract = g_hash_table_lookup (key_value_pairs, "abstract");
 655
 656   if (path != NULL)
 657     {
 658       address = g_unix_socket_address_new (path);
 659     }
 660   else if (tmpdir != NULL)
 661     {
 662       gint n;
 663       GString *s;
 664       GError *local_error;
 665
 666     retry:
 667       s = g_string_new (tmpdir);
 668       g_string_append (s, "/dbus-");
 669       for (n = 0; n < 8; n++)
 670         g_string_append_c (s, random_ascii ());
 671
 672       /* prefer abstract namespace if available */
 673       if (g_unix_socket_address_abstract_names_supported ())
 674         address = g_unix_socket_address_new_with_type (s->str,
 675                                                        -1,
 676                                                        G_UNIX_SOCKET_ADDRESS_ABSTRACT);
 677       else
 678         address = g_unix_socket_address_new (s->str);
 679       g_string_free (s, TRUE);
 680
 681       local_error = NULL;
 682       if (!g_socket_listener_add_address (server->listener,
 683                                           address,
 684                                           G_SOCKET_TYPE_STREAM,
 685                                           G_SOCKET_PROTOCOL_DEFAULT,
 686                                           NULL, /* source_object */
 687                                           NULL, /* effective_address */
 688                                           &local_error))
 689         {
 690           if (local_error->domain == G_IO_ERROR && local_error->code == G_IO_ERROR_ADDRESS_IN_USE)
 691             {
 692               g_error_free (local_error);
 693               goto retry;
 694             }
 695           g_propagate_error (error, local_error);
 696           goto out;
 697         }
 698       ret = TRUE;
 699       goto out;
 700     }
 701   else if (abstract != NULL)
 702     {
 703       if (!g_unix_socket_address_abstract_names_supported ())
 704         {
 705           g_set_error_literal (error,
 706                                G_IO_ERROR,
 707                                G_IO_ERROR_NOT_SUPPORTED,
 708                                _("Abstract name space not supported"));
 709           goto out;
 710         }
 711       address = g_unix_socket_address_new_with_type (abstract,
 712                                                      -1,
 713                                                      G_UNIX_SOCKET_ADDRESS_ABSTRACT);
 714     }
 715   else
 716     {
 717       g_assert_not_reached ();
 718     }
 719
 720   if (!g_socket_listener_add_address (server->listener,
 721                                       address,
 722                                       G_SOCKET_TYPE_STREAM,
 723                                       G_SOCKET_PROTOCOL_DEFAULT,
 724                                       NULL, /* source_object */
 725                                       NULL, /* effective_address */
 726                                       error))
 727     goto out;
 728
 729   ret = TRUE;
 730
 731  out:
 732
 733   if (address != NULL)
 734     {
 735       /* Fill out client_address if the connection attempt worked */
 736       if (ret)
 737         {
 738           server->is_using_listener = TRUE;
 739
 740           switch (g_unix_socket_address_get_address_type (G_UNIX_SOCKET_ADDRESS (address)))
 741             {
 742             case G_UNIX_SOCKET_ADDRESS_ABSTRACT:
 743               server->client_address = g_strdup_printf ("unix:abstract=%s",
 744                                                         g_unix_socket_address_get_path (G_UNIX_SOCKET_ADDRESS (address)));
 745               break;
 746
 747             case G_UNIX_SOCKET_ADDRESS_PATH:
 748               server->client_address = g_strdup_printf ("unix:path=%s",
 749                                                         g_unix_socket_address_get_path (G_UNIX_SOCKET_ADDRESS (address)));
 750               break;
 751
 752             default:
 753               g_assert_not_reached ();
 754               break;
 755             }
 756         }
 757       g_object_unref (address);
 758     }
 759   return ret;
 760 }
 761 #endif
 762
 763 /* ---------------------------------------------------------------------------------------------------- */
 764
 765 /* note that address_entry has already been validated =>
 766  *  both host and port (guaranteed to be a number in [0, 65535]) are set (family is optional)
 767  */
 768 static gboolean
 769 try_tcp (GDBusServer  *server,
 770          const gchar  *address_entry,
 771          GHashTable   *key_value_pairs,
 772          gboolean      do_nonce,
 773          GError      **error)
 774 {
 775   gboolean ret;
 776   const gchar *host;
 777   const gchar *port;
 778   gint port_num;
 779   GResolver *resolver;
 780   GList *resolved_addresses;
 781   GList *l;
 782
 783   ret = FALSE;
 784   resolver = NULL;
 785   resolved_addresses = NULL;
 786
 787   host = g_hash_table_lookup (key_value_pairs, "host");
 788   port = g_hash_table_lookup (key_value_pairs, "port");
 789   /* family = g_hash_table_lookup (key_value_pairs, "family"); */
 790   if (g_hash_table_lookup (key_value_pairs, "noncefile") != NULL)
 791     {
 792       g_set_error_literal (error,
 793                            G_IO_ERROR,
 794                            G_IO_ERROR_INVALID_ARGUMENT,
 795                            _("Cannot specify nonce file when creating a server"));
 796       goto out;
 797     }
 798
 799   if (host == NULL)
 800     host = "localhost";
 801   if (port == NULL)
 802     port = "0";
 803   port_num = strtol (port, NULL, 10);
 804
 805   resolver = g_resolver_get_default ();
 806   resolved_addresses = g_resolver_lookup_by_name (resolver,
 807                                                   host,
 808                                                   NULL,
 809                                                   error);
 810   if (resolved_addresses == NULL)
 811     goto out;
 812
 813   /* TODO: handle family */
 814   for (l = resolved_addresses; l != NULL; l = l->next)
 815     {
 816       GInetAddress *address = G_INET_ADDRESS (l->data);
 817       GSocketAddress *socket_address;
 818       GSocketAddress *effective_address;
 819
 820       socket_address = g_inet_socket_address_new (address, port_num);
 821       if (!g_socket_listener_add_address (server->listener,
 822                                           socket_address,
 823                                           G_SOCKET_TYPE_STREAM,
 824                                           G_SOCKET_PROTOCOL_TCP,
 825                                           NULL, /* GObject *source_object */
 826                                           &effective_address,
 827                                           error))
 828         {
 829           g_object_unref (socket_address);
 830           goto out;
 831         }
 832       if (port_num == 0)
 833         /* make sure we allocate the same port number for other listeners */
 834         port_num = g_inet_socket_address_get_port (G_INET_SOCKET_ADDRESS (effective_address));
 835
 836       g_object_unref (effective_address);
 837       g_object_unref (socket_address);
 838     }
 839
 840   if (do_nonce)
 841     {
 842       gint fd;
 843       guint n;
 844       gsize bytes_written;
 845       gsize bytes_remaining;
 846       char *file_escaped;
 847
 848       server->nonce = g_new0 (guchar, 16);
 849       for (n = 0; n < 16; n++)
 850         server->nonce[n] = g_random_int_range (0, 256);
 851       fd = g_file_open_tmp ("gdbus-nonce-file-XXXXXX",
 852                             &server->nonce_file,
 853                             error);
 854       if (fd == -1)
 855         {
 856           g_socket_listener_close (server->listener);
 857           goto out;
 858         }
 859     again:
 860       bytes_written = 0;
 861       bytes_remaining = 16;
 862       while (bytes_remaining > 0)
 863         {
 864           gssize ret;
 865           int errsv;
 866
 867           ret = write (fd, server->nonce + bytes_written, bytes_remaining);
 868           errsv = errno;
 869           if (ret == -1)
 870             {
 871               if (errsv == EINTR)
 872                 goto again;
 873               g_set_error (error,
 874                            G_IO_ERROR,
 875                            g_io_error_from_errno (errsv),
 876                            _("Error writing nonce file at “%s”: %s"),
 877                            server->nonce_file,
 878                            g_strerror (errsv));
 879               goto out;
 880             }
 881           bytes_written += ret;
 882           bytes_remaining -= ret;
 883         }
 884       if (!g_close (fd, error))
 885         goto out;
 886       file_escaped = g_uri_escape_string (server->nonce_file, "/\\", FALSE);
 887       server->client_address = g_strdup_printf ("nonce-tcp:host=%s,port=%d,noncefile=%s",
 888                                                 host,
 889                                                 port_num,
 890                                                 file_escaped);
 891       g_free (file_escaped);
 892     }
 893   else
 894     {
 895       server->client_address = g_strdup_printf ("tcp:host=%s,port=%d", host, port_num);
 896     }
 897   server->is_using_listener = TRUE;
 898   ret = TRUE;
 899
 900  out:
 901   g_list_free_full (resolved_addresses, g_object_unref);
 902   if (resolver)
 903     g_object_unref (resolver);
 904   return ret;
 905 }
 906
 907 /* ---------------------------------------------------------------------------------------------------- */
 908
 909 typedef struct
 910 {
 911   GDBusServer *server;
 912   GDBusConnection *connection;
 913 } EmitIdleData;
 914
 915 static void
 916 emit_idle_data_free (EmitIdleData *data)
 917 {
 918   g_object_unref (data->server);
 919   g_object_unref (data->connection);
 920   g_free (data);
 921 }
 922
 923 static gboolean
 924 emit_new_connection_in_idle (gpointer user_data)
 925 {
 926   EmitIdleData *data = user_data;
 927   gboolean claimed;
 928
 929   claimed = FALSE;
 930   g_signal_emit (data->server,
 931                  _signals[NEW_CONNECTION_SIGNAL],
 932                  0,
 933                  data->connection,
 934                  &claimed);
 935
 936   if (claimed)
 937     g_dbus_connection_start_message_processing (data->connection);
 938   g_object_unref (data->connection);
 939
 940   return FALSE;
 941 }
 942
 943 /* Called in new thread */
 944 static gboolean
 945 on_run (GSocketService    *service,
 946         GSocketConnection *socket_connection,
 947         GObject           *source_object,
 948         gpointer           user_data)
 949 {
 950   GDBusServer *server = G_DBUS_SERVER (user_data);
 951   GDBusConnection *connection;
 952   GDBusConnectionFlags connection_flags;
 953
 954   if (server->nonce != NULL)
 955     {
 956       gchar buf[16];
 957       gsize bytes_read;
 958
 959       if (!g_input_stream_read_all (g_io_stream_get_input_stream (G_IO_STREAM (socket_connection)),
 960                                     buf,
 961                                     16,
 962                                     &bytes_read,
 963                                     NULL,  /* GCancellable */
 964                                     NULL)) /* GError */
 965         goto out;
 966
 967       if (bytes_read != 16)
 968         goto out;
 969
 970       if (memcmp (buf, server->nonce, 16) != 0)
 971         goto out;
 972     }
 973
 974   connection_flags =
 975     G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER |
 976     G_DBUS_CONNECTION_FLAGS_DELAY_MESSAGE_PROCESSING;
 977   if (server->flags & G_DBUS_SERVER_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS)
 978     connection_flags |= G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS;
 979
 980   connection = g_dbus_connection_new_sync (G_IO_STREAM (socket_connection),
 981                                            server->guid,
 982                                            connection_flags,
 983                                            server->authentication_observer,
 984                                            NULL,  /* GCancellable */
 985                                            NULL); /* GError */
 986   if (connection == NULL)
 987       goto out;
 988
 989   if (server->flags & G_DBUS_SERVER_FLAGS_RUN_IN_THREAD)
 990     {
 991       gboolean claimed;
 992
 993       claimed = FALSE;
 994       g_signal_emit (server,
 995                      _signals[NEW_CONNECTION_SIGNAL],
 996                      0,
 997                      connection,
 998                      &claimed);
 999       if (claimed)
1000         g_dbus_connection_start_message_processing (connection);
1001       g_object_unref (connection);
1002     }
1003   else
1004     {
1005       GSource *idle_source;
1006       EmitIdleData *data;
1007
1008       data = g_new0 (EmitIdleData, 1);
1009       data->server = g_object_ref (server);
1010       data->connection = g_object_ref (connection);
1011
1012       idle_source = g_idle_source_new ();
1013       g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
1014       g_source_set_callback (idle_source,
1015                              emit_new_connection_in_idle,
1016                              data,
1017                              (GDestroyNotify) emit_idle_data_free);
1018       g_source_set_name (idle_source, "[gio] emit_new_connection_in_idle");
1019       g_source_attach (idle_source, server->main_context_at_construction);
1020       g_source_unref (idle_source);
1021     }
1022
1023  out:
1024   return TRUE;
1025 }
1026
1027 static gboolean
1028 initable_init (GInitable     *initable,
1029                GCancellable  *cancellable,
1030                GError       **error)
1031 {
1032   GDBusServer *server = G_DBUS_SERVER (initable);
1033   gboolean ret;
1034   guint n;
1035   gchar **addr_array;
1036   GError *last_error;
1037
1038   ret = FALSE;
1039   addr_array = NULL;
1040   last_error = NULL;
1041
1042   if (!g_dbus_is_guid (server->guid))
1043     {
1044       g_set_error (&last_error,
1045                    G_IO_ERROR,
1046                    G_IO_ERROR_INVALID_ARGUMENT,
1047                    _("The string “%s” is not a valid D-Bus GUID"),
1048                    server->guid);
1049       goto out;
1050     }
1051
1052   server->listener = G_SOCKET_LISTENER (g_threaded_socket_service_new (-1));
1053
1054   addr_array = g_strsplit (server->address, ";", 0);
1055   last_error = NULL;
1056   for (n = 0; addr_array != NULL && addr_array[n] != NULL; n++)
1057     {
1058       const gchar *address_entry = addr_array[n];
1059       GHashTable *key_value_pairs;
1060       gchar *transport_name;
1061       GError *this_error;
1062
1063       this_error = NULL;
1064       if (g_dbus_is_supported_address (address_entry,
1065                                        &this_error) &&
1066           _g_dbus_address_parse_entry (address_entry,
1067                                        &transport_name,
1068                                        &key_value_pairs,
1069                                        &this_error))
1070         {
1071
1072           if (FALSE)
1073             {
1074             }
1075 #ifdef G_OS_UNIX
1076           else if (g_strcmp0 (transport_name, "unix") == 0)
1077             ret = try_unix (server, address_entry, key_value_pairs, &this_error);
1078 #endif
1079           else if (g_strcmp0 (transport_name, "tcp") == 0)
1080             ret = try_tcp (server, address_entry, key_value_pairs, FALSE, &this_error);
1081           else if (g_strcmp0 (transport_name, "nonce-tcp") == 0)
1082             ret = try_tcp (server, address_entry, key_value_pairs, TRUE, &this_error);
1083           else
1084             g_set_error (&this_error,
1085                          G_IO_ERROR,
1086                          G_IO_ERROR_INVALID_ARGUMENT,
1087                          _("Cannot listen on unsupported transport “%s”"),
1088                          transport_name);
1089
1090           g_free (transport_name);
1091           if (key_value_pairs != NULL)
1092             g_hash_table_unref (key_value_pairs);
1093
1094           if (ret)
1095             {
1096               g_assert (this_error == NULL);
1097               goto out;
1098             }
1099         }
1100
1101       if (this_error != NULL)
1102         {
1103           if (last_error != NULL)
1104             g_error_free (last_error);
1105           last_error = this_error;
1106         }
1107     }
1108
1109  out:
1110
1111   g_strfreev (addr_array);
1112
1113   if (ret)
1114     {
1115       if (last_error != NULL)
1116         g_error_free (last_error);
1117
1118       /* Right now we don't have any transport not using the listener... */
1119       g_assert (server->is_using_listener);
1120       server->run_signal_handler_id = g_signal_connect (G_SOCKET_SERVICE (server->listener),
1121                                                         "run",
1122                                                         G_CALLBACK (on_run),
1123                                                         server);
1124     }
1125   else
1126     {
1127       g_assert (last_error != NULL);
1128       g_propagate_error (error, last_error);
1129     }
1130   return ret;
1131 }
1132
1133
1134 static void
1135 initable_iface_init (GInitableIface *initable_iface)
1136 {
1137   initable_iface->init = initable_init;
1138 }
1139
1140 /* ---------------------------------------------------------------------------------------------------- */