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