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   gboolean (*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, take a reference to the
 395    * @connection object and return %TRUE. When you are done with the
 396    * connection call g_dbus_connection_close() and give up your
 397    * reference. Note that the other peer may disconnect at any time -
 398    * a typical thing to do when accepting a connection is to listen to
 399    * the #GDBusConnection::closed signal.
 400    *
 401    * If #GDBusServer:flags contains %G_DBUS_SERVER_FLAGS_RUN_IN_THREAD
 402    * then the signal is emitted in a new thread dedicated to the
 403    * connection. Otherwise the signal is emitted in the <link
 404    * linkend="g-main-context-push-thread-default">thread-default main
 405    * loop</link> of the thread that @server was constructed in.
 406    *
 407    * You are guaranteed that signal handlers for this signal runs
 408    * before incoming messages on @connection are processed. This means
 409    * that it's suitable to call g_dbus_connection_register_object() or
 410    * similar from the signal handler.
 411    *
 412    * Returns: %TRUE to claim @connection, %FALSE to let other handlers
 413    * run.
 414    *
 415    * Since: 2.26
 416    */
 417   _signals[NEW_CONNECTION_SIGNAL] = g_signal_new ("new-connection",
 418                                                   G_TYPE_DBUS_SERVER,
 419                                                   G_SIGNAL_RUN_LAST,
 420                                                   G_STRUCT_OFFSET (GDBusServerClass, new_connection),
 421                                                   g_signal_accumulator_true_handled,
 422                                                   NULL, /* accu_data */
 423                                                   _gio_marshal_BOOLEAN__OBJECT,
 424                                                   G_TYPE_BOOLEAN,
 425                                                   1,
 426                                                   G_TYPE_DBUS_CONNECTION);
 427 }
 428
 429 static void
 430 g_dbus_server_init (GDBusServer *server)
 431 {
 432   server->main_context_at_construction = g_main_context_get_thread_default ();
 433   if (server->main_context_at_construction != NULL)
 434     g_main_context_ref (server->main_context_at_construction);
 435 }
 436
 437 static gboolean
 438 on_run (GSocketService    *service,
 439         GSocketConnection *socket_connection,
 440         GObject           *source_object,
 441         gpointer           user_data);
 442
 443 /**
 444  * g_dbus_server_new_sync:
 445  * @address: A D-Bus address.
 446  * @flags: Flags from the #GDBusServerFlags enumeration.
 447  * @guid: A D-Bus GUID.
 448  * @observer: A #GDBusAuthObserver or %NULL.
 449  * @cancellable: A #GCancellable or %NULL.
 450  * @error: Return location for server or %NULL.
 451  *
 452  * Creates a new D-Bus server that listens on the first address in
 453  * @address that works.
 454  *
 455  * Once constructed, you can use g_dbus_server_get_client_address() to
 456  * get a D-Bus address string that clients can use to connect.
 457  *
 458  * Connect to the #GDBusServer::new-connection signal to handle
 459  * incoming connections.
 460  *
 461  * The returned #GDBusServer isn't active - you have to start it with
 462  * g_dbus_server_start().
 463  *
 464  * See <xref linkend="gdbus-peer-to-peer"/> for how #GDBusServer can
 465  * be used.
 466  *
 467  * This is a synchronous failable constructor. See
 468  * g_dbus_server_new() for the asynchronous version.
 469  *
 470  * Returns: A #GDBusServer or %NULL if @error is set. Free with
 471  * g_object_unref().
 472  *
 473  * Since: 2.26
 474  */
 475 GDBusServer *
 476 g_dbus_server_new_sync (const gchar        *address,
 477                         GDBusServerFlags    flags,
 478                         const gchar        *guid,
 479                         GDBusAuthObserver  *observer,
 480                         GCancellable       *cancellable,
 481                         GError            **error)
 482 {
 483   GDBusServer *server;
 484
 485   g_return_val_if_fail (address != NULL, NULL);
 486   g_return_val_if_fail (g_dbus_is_guid (guid), NULL);
 487   g_return_val_if_fail (error == NULL || *error == NULL, NULL);
 488
 489   server = g_initable_new (G_TYPE_DBUS_SERVER,
 490                            cancellable,
 491                            error,
 492                            "address", address,
 493                            "flags", flags,
 494                            "guid", guid,
 495                            "authentication-observer", observer,
 496                            NULL);
 497
 498   return server;
 499 }
 500
 501 /**
 502  * g_dbus_server_get_client_address:
 503  * @server: A #GDBusServer.
 504  *
 505  * Gets a D-Bus address string that can be used by clients to connect
 506  * to @server.
 507  *
 508  * Returns: A D-Bus address string. Do not free, the string is owned
 509  * by @server.
 510  *
 511  * Since: 2.26
 512  */
 513 const gchar *
 514 g_dbus_server_get_client_address (GDBusServer *server)
 515 {
 516   g_return_val_if_fail (G_IS_DBUS_SERVER (server), NULL);
 517   return server->client_address;
 518 }
 519
 520 /**
 521  * g_dbus_server_get_guid:
 522  * @server: A #GDBusServer.
 523  *
 524  * Gets the GUID for @server.
 525  *
 526  * Returns: A D-Bus GUID. Do not free this string, it is owned by @server.
 527  *
 528  * Since: 2.26
 529  */
 530 const gchar *
 531 g_dbus_server_get_guid (GDBusServer *server)
 532 {
 533   g_return_val_if_fail (G_IS_DBUS_SERVER (server), NULL);
 534   return server->guid;
 535 }
 536
 537 /**
 538  * g_dbus_server_get_flags:
 539  * @server: A #GDBusServer.
 540  *
 541  * Gets the flags for @server.
 542  *
 543  * Returns: A set of flags from the #GDBusServerFlags enumeration.
 544  *
 545  * Since: 2.26
 546  */
 547 GDBusServerFlags
 548 g_dbus_server_get_flags (GDBusServer *server)
 549 {
 550   g_return_val_if_fail (G_IS_DBUS_SERVER (server), G_DBUS_SERVER_FLAGS_NONE);
 551   return server->flags;
 552 }
 553
 554 /**
 555  * g_dbus_server_is_active:
 556  * @server: A #GDBusServer.
 557  *
 558  * Gets whether @server is active.
 559  *
 560  * Returns: %TRUE if server is active, %FALSE otherwise.
 561  *
 562  * Since: 2.26
 563  */
 564 gboolean
 565 g_dbus_server_is_active (GDBusServer *server)
 566 {
 567   g_return_val_if_fail (G_IS_DBUS_SERVER (server), G_DBUS_SERVER_FLAGS_NONE);
 568   return server->active;
 569 }
 570
 571 /**
 572  * g_dbus_server_start:
 573  * @server: A #GDBusServer.
 574  *
 575  * Starts @server.
 576  *
 577  * Since: 2.26
 578  */
 579 void
 580 g_dbus_server_start (GDBusServer *server)
 581 {
 582   g_return_if_fail (G_IS_DBUS_SERVER (server));
 583   if (server->active)
 584     return;
 585   /* Right now we don't have any transport not using the listener... */
 586   g_assert (server->is_using_listener);
 587   g_socket_service_start (G_SOCKET_SERVICE (server->listener));
 588   server->active = TRUE;
 589   g_object_notify (G_OBJECT (server), "active");
 590 }
 591
 592 /**
 593  * g_dbus_server_stop:
 594  * @server: A #GDBusServer.
 595  *
 596  * Stops @server.
 597  *
 598  * Since: 2.26
 599  */
 600 void
 601 g_dbus_server_stop (GDBusServer *server)
 602 {
 603   g_return_if_fail (G_IS_DBUS_SERVER (server));
 604   if (!server->active)
 605     return;
 606   /* Right now we don't have any transport not using the listener... */
 607   g_assert (server->is_using_listener);
 608   g_assert (server->run_signal_handler_id > 0);
 609   g_signal_handler_disconnect (server->listener, server->run_signal_handler_id);
 610   server->run_signal_handler_id = 0;
 611   g_socket_service_stop (G_SOCKET_SERVICE (server->listener));
 612   server->active = FALSE;
 613   g_object_notify (G_OBJECT (server), "active");
 614 }
 615
 616 /* ---------------------------------------------------------------------------------------------------- */
 617
 618 #ifdef G_OS_UNIX
 619
 620 static gint
 621 random_ascii (void)
 622 {
 623   gint ret;
 624   ret = g_random_int_range (0, 60);
 625   if (ret < 25)
 626     ret += 'A';
 627   else if (ret < 50)
 628     ret += 'a' - 25;
 629   else
 630     ret += '0' - 50;
 631   return ret;
 632 }
 633
 634 /* note that address_entry has already been validated => exactly one of path, tmpdir or abstract keys are set */
 635 static gboolean
 636 try_unix (GDBusServer  *server,
 637           const gchar  *address_entry,
 638           GHashTable   *key_value_pairs,
 639           GError      **error)
 640 {
 641   gboolean ret;
 642   const gchar *path;
 643   const gchar *tmpdir;
 644   const gchar *abstract;
 645   GSocketAddress *address;
 646
 647   ret = FALSE;
 648   address = NULL;
 649
 650   path = g_hash_table_lookup (key_value_pairs, "path");
 651   tmpdir = g_hash_table_lookup (key_value_pairs, "tmpdir");
 652   abstract = g_hash_table_lookup (key_value_pairs, "abstract");
 653
 654   if (path != NULL)
 655     {
 656       address = g_unix_socket_address_new (path);
 657     }
 658   else if (tmpdir != NULL)
 659     {
 660       gint n;
 661       GString *s;
 662       GError *local_error;
 663
 664     retry:
 665       s = g_string_new (tmpdir);
 666       g_string_append (s, "/dbus-");
 667       for (n = 0; n < 8; n++)
 668         g_string_append_c (s, random_ascii ());
 669
 670       /* prefer abstract namespace if available */
 671       if (g_unix_socket_address_abstract_names_supported ())
 672         address = g_unix_socket_address_new_with_type (s->str,
 673                                                        -1,
 674                                                        G_UNIX_SOCKET_ADDRESS_ABSTRACT);
 675       else
 676         address = g_unix_socket_address_new (s->str);
 677       g_string_free (s, TRUE);
 678
 679       local_error = NULL;
 680       if (!g_socket_listener_add_address (server->listener,
 681                                           address,
 682                                           G_SOCKET_TYPE_STREAM,
 683                                           G_SOCKET_PROTOCOL_DEFAULT,
 684                                           NULL, /* source_object */
 685                                           NULL, /* effective_address */
 686                                           &local_error))
 687         {
 688           if (local_error->domain == G_IO_ERROR && local_error->code == G_IO_ERROR_ADDRESS_IN_USE)
 689             {
 690               g_error_free (local_error);
 691               goto retry;
 692             }
 693           g_propagate_error (error, local_error);
 694           goto out;
 695         }
 696       ret = TRUE;
 697       goto out;
 698     }
 699   else if (abstract != NULL)
 700     {
 701       if (!g_unix_socket_address_abstract_names_supported ())
 702         {
 703           g_set_error_literal (error,
 704                                G_IO_ERROR,
 705                                G_IO_ERROR_NOT_SUPPORTED,
 706                                _("Abstract name space not supported"));
 707           goto out;
 708         }
 709       address = g_unix_socket_address_new_with_type (abstract,
 710                                                      -1,
 711                                                      G_UNIX_SOCKET_ADDRESS_ABSTRACT);
 712     }
 713   else
 714     {
 715       g_assert_not_reached ();
 716     }
 717
 718   if (!g_socket_listener_add_address (server->listener,
 719                                       address,
 720                                       G_SOCKET_TYPE_STREAM,
 721                                       G_SOCKET_PROTOCOL_DEFAULT,
 722                                       NULL, /* source_object */
 723                                       NULL, /* effective_address */
 724                                       error))
 725     goto out;
 726
 727   ret = TRUE;
 728
 729  out:
 730
 731   if (address != NULL)
 732     {
 733       /* Fill out client_address if the connection attempt worked */
 734       if (ret)
 735         {
 736           server->is_using_listener = TRUE;
 737
 738           switch (g_unix_socket_address_get_address_type (G_UNIX_SOCKET_ADDRESS (address)))
 739             {
 740             case G_UNIX_SOCKET_ADDRESS_ABSTRACT:
 741               server->client_address = g_strdup_printf ("unix:abstract=%s",
 742                                                         g_unix_socket_address_get_path (G_UNIX_SOCKET_ADDRESS (address)));
 743               break;
 744
 745             case G_UNIX_SOCKET_ADDRESS_PATH:
 746               server->client_address = g_strdup_printf ("unix:path=%s",
 747                                                         g_unix_socket_address_get_path (G_UNIX_SOCKET_ADDRESS (address)));
 748               break;
 749
 750             default:
 751               g_assert_not_reached ();
 752               break;
 753             }
 754         }
 755       g_object_unref (address);
 756     }
 757   return ret;
 758 }
 759 #endif
 760
 761 /* ---------------------------------------------------------------------------------------------------- */
 762
 763 /* note that address_entry has already been validated =>
 764  *  both host and port (guranteed to be a number in [0, 65535]) are set (family is optional)
 765  */
 766 static gboolean
 767 try_tcp (GDBusServer  *server,
 768          const gchar  *address_entry,
 769          GHashTable   *key_value_pairs,
 770          gboolean      do_nonce,
 771          GError      **error)
 772 {
 773   gboolean ret;
 774   const gchar *host;
 775   const gchar *port;
 776   gint port_num;
 777   GResolver *resolver;
 778   GList *resolved_addresses;
 779   GList *l;
 780
 781   ret = FALSE;
 782   resolver = NULL;
 783   resolved_addresses = NULL;
 784
 785   host = g_hash_table_lookup (key_value_pairs, "host");
 786   port = g_hash_table_lookup (key_value_pairs, "port");
 787   /* family = g_hash_table_lookup (key_value_pairs, "family"); */
 788   if (g_hash_table_lookup (key_value_pairs, "noncefile") != NULL)
 789     {
 790       g_set_error_literal (error,
 791                            G_IO_ERROR,
 792                            G_IO_ERROR_INVALID_ARGUMENT,
 793                            _("Cannot specify nonce file when creating a server"));
 794       goto out;
 795     }
 796
 797   if (host == NULL)
 798     host = "localhost";
 799   if (port == NULL)
 800     port = "0";
 801   port_num = strtol (port, NULL, 10);
 802
 803   resolver = g_resolver_get_default ();
 804   resolved_addresses = g_resolver_lookup_by_name (resolver,
 805                                                   host,
 806                                                   NULL,
 807                                                   error);
 808   if (resolved_addresses == NULL)
 809     goto out;
 810
 811   /* TODO: handle family */
 812   for (l = resolved_addresses; l != NULL; l = l->next)
 813     {
 814       GInetAddress *address = G_INET_ADDRESS (l->data);
 815       GSocketAddress *socket_address;
 816       GSocketAddress *effective_address;
 817
 818       socket_address = g_inet_socket_address_new (address, port_num);
 819       if (!g_socket_listener_add_address (server->listener,
 820                                           socket_address,
 821                                           G_SOCKET_TYPE_STREAM,
 822                                           G_SOCKET_PROTOCOL_TCP,
 823                                           NULL, /* GObject *source_object */
 824                                           &effective_address,
 825                                           error))
 826         {
 827           g_object_unref (socket_address);
 828           goto out;
 829         }
 830       if (port_num == 0)
 831         /* make sure we allocate the same port number for other listeners */
 832         port_num = g_inet_socket_address_get_port (G_INET_SOCKET_ADDRESS (effective_address));
 833
 834       g_object_unref (effective_address);
 835       g_object_unref (socket_address);
 836     }
 837
 838   if (do_nonce)
 839     {
 840       gint fd;
 841       guint n;
 842       gsize bytes_written;
 843       gsize bytes_remaining;
 844
 845       server->nonce = g_new0 (guchar, 16);
 846       for (n = 0; n < 16; n++)
 847         server->nonce[n] = g_random_int_range (0, 256);
 848       fd = g_file_open_tmp ("gdbus-nonce-file-XXXXXX",
 849                             &server->nonce_file,
 850                             error);
 851       if (fd == -1)
 852         {
 853           g_socket_listener_close (server->listener);
 854           goto out;
 855         }
 856     again:
 857       bytes_written = 0;
 858       bytes_remaining = 16;
 859       while (bytes_remaining > 0)
 860         {
 861           gssize ret;
 862           ret = write (fd, server->nonce + bytes_written, bytes_remaining);
 863           if (ret == -1)
 864             {
 865               if (errno == EINTR)
 866                 goto again;
 867               g_set_error (error,
 868                            G_IO_ERROR,
 869                            g_io_error_from_errno (errno),
 870                            _("Error writing nonce file at `%s': %s"),
 871                            server->nonce_file,
 872                            strerror (errno));
 873               goto out;
 874             }
 875           bytes_written += ret;
 876           bytes_remaining -= ret;
 877         }
 878       close (fd);
 879       server->client_address = g_strdup_printf ("nonce-tcp:host=%s,port=%d,noncefile=%s",
 880                                                 host,
 881                                                 port_num,
 882                                                 server->nonce_file);
 883     }
 884   else
 885     {
 886       server->client_address = g_strdup_printf ("tcp:host=%s,port=%d", host, port_num);
 887     }
 888   server->is_using_listener = TRUE;
 889   ret = TRUE;
 890
 891  out:
 892   g_list_foreach (resolved_addresses, (GFunc) g_object_unref, NULL);
 893   g_list_free (resolved_addresses);
 894   g_object_unref (resolver);
 895   return ret;
 896 }
 897
 898 /* ---------------------------------------------------------------------------------------------------- */
 899
 900 typedef struct
 901 {
 902   GDBusServer *server;
 903   GDBusConnection *connection;
 904 } EmitIdleData;
 905
 906 static void
 907 emit_idle_data_free (EmitIdleData *data)
 908 {
 909   g_object_unref (data->server);
 910   g_object_unref (data->connection);
 911   g_free (data);
 912 }
 913
 914 static gboolean
 915 emit_new_connection_in_idle (gpointer user_data)
 916 {
 917   EmitIdleData *data = user_data;
 918   gboolean claimed;
 919
 920   claimed = FALSE;
 921   g_signal_emit (data->server,
 922                  _signals[NEW_CONNECTION_SIGNAL],
 923                  0,
 924                  data->connection,
 925                  &claimed);
 926
 927   if (claimed)
 928     g_dbus_connection_start_message_processing (data->connection);
 929   g_object_unref (data->connection);
 930
 931   return FALSE;
 932 }
 933
 934 /* Called in new thread */
 935 static gboolean
 936 on_run (GSocketService    *service,
 937         GSocketConnection *socket_connection,
 938         GObject           *source_object,
 939         gpointer           user_data)
 940 {
 941   GDBusServer *server = G_DBUS_SERVER (user_data);
 942   GDBusConnection *connection;
 943   GDBusConnectionFlags connection_flags;
 944
 945   if (server->nonce != NULL)
 946     {
 947       gchar buf[16];
 948       gsize bytes_read;
 949
 950       if (!g_input_stream_read_all (g_io_stream_get_input_stream (G_IO_STREAM (socket_connection)),
 951                                     buf,
 952                                     16,
 953                                     &bytes_read,
 954                                     NULL,  /* GCancellable */
 955                                     NULL)) /* GError */
 956         goto out;
 957
 958       if (bytes_read != 16)
 959         goto out;
 960
 961       if (memcmp (buf, server->nonce, 16) != 0)
 962         goto out;
 963     }
 964
 965   connection_flags =
 966     G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER |
 967     G_DBUS_CONNECTION_FLAGS_DELAY_MESSAGE_PROCESSING;
 968   if (server->flags & G_DBUS_SERVER_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS)
 969     connection_flags |= G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS;
 970
 971   connection = g_dbus_connection_new_sync (G_IO_STREAM (socket_connection),
 972                                            server->guid,
 973                                            connection_flags,
 974                                            server->authentication_observer,
 975                                            NULL,  /* GCancellable */
 976                                            NULL); /* GError */
 977   if (connection == NULL)
 978       goto out;
 979
 980   if (server->flags & G_DBUS_SERVER_FLAGS_RUN_IN_THREAD)
 981     {
 982       g_signal_emit (server,
 983                      _signals[NEW_CONNECTION_SIGNAL],
 984                      0,
 985                      connection);
 986       g_dbus_connection_start_message_processing (connection);
 987       g_object_unref (connection);
 988     }
 989   else
 990     {
 991       GSource *idle_source;
 992       EmitIdleData *data;
 993
 994       data = g_new0 (EmitIdleData, 1);
 995       data->server = g_object_ref (server);
 996       data->connection = g_object_ref (connection);
 997
 998       idle_source = g_idle_source_new ();
 999       g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
1000       g_source_set_callback (idle_source,
1001                              emit_new_connection_in_idle,
1002                              data,
1003                              (GDestroyNotify) emit_idle_data_free);
1004       g_source_attach (idle_source, server->main_context_at_construction);
1005       g_source_unref (idle_source);
1006     }
1007
1008  out:
1009   return TRUE;
1010 }
1011
1012 static gboolean
1013 initable_init (GInitable     *initable,
1014                GCancellable  *cancellable,
1015                GError       **error)
1016 {
1017   GDBusServer *server = G_DBUS_SERVER (initable);
1018   gboolean ret;
1019   guint n;
1020   gchar **addr_array;
1021   GError *last_error;
1022
1023   ret = FALSE;
1024   addr_array = NULL;
1025   last_error = NULL;
1026
1027   if (!g_dbus_is_guid (server->guid))
1028     {
1029       g_set_error (&last_error,
1030                    G_IO_ERROR,
1031                    G_IO_ERROR_INVALID_ARGUMENT,
1032                    _("The string `%s' is not a valid D-Bus GUID"),
1033                    server->guid);
1034       goto out;
1035     }
1036
1037   server->listener = G_SOCKET_LISTENER (g_threaded_socket_service_new (-1));
1038
1039   addr_array = g_strsplit (server->address, ";", 0);
1040   last_error = NULL;
1041   for (n = 0; addr_array != NULL && addr_array[n] != NULL; n++)
1042     {
1043       const gchar *address_entry = addr_array[n];
1044       GHashTable *key_value_pairs;
1045       gchar *transport_name;
1046       GError *this_error;
1047
1048       this_error = NULL;
1049       if (g_dbus_is_supported_address (address_entry,
1050                                        &this_error) &&
1051           _g_dbus_address_parse_entry (address_entry,
1052                                        &transport_name,
1053                                        &key_value_pairs,
1054                                        &this_error))
1055         {
1056
1057           if (FALSE)
1058             {
1059             }
1060 #ifdef G_OS_UNIX
1061           else if (g_strcmp0 (transport_name, "unix") == 0)
1062             ret = try_unix (server, address_entry, key_value_pairs, &this_error);
1063 #endif
1064           else if (g_strcmp0 (transport_name, "tcp") == 0)
1065             ret = try_tcp (server, address_entry, key_value_pairs, FALSE, &this_error);
1066           else if (g_strcmp0 (transport_name, "nonce-tcp") == 0)
1067             ret = try_tcp (server, address_entry, key_value_pairs, TRUE, &this_error);
1068           else
1069             g_set_error (&this_error,
1070                          G_IO_ERROR,
1071                          G_IO_ERROR_INVALID_ARGUMENT,
1072                          _("Cannot listen on unsupported transport `%s'"),
1073                          transport_name);
1074
1075           g_free (transport_name);
1076           if (key_value_pairs != NULL)
1077             g_hash_table_unref (key_value_pairs);
1078
1079           if (ret)
1080             {
1081               g_assert (this_error == NULL);
1082               goto out;
1083             }
1084         }
1085
1086       if (this_error != NULL)
1087         {
1088           if (last_error != NULL)
1089             g_error_free (last_error);
1090           last_error = this_error;
1091         }
1092     }
1093
1094  out:
1095
1096   g_strfreev (addr_array);
1097
1098   if (ret)
1099     {
1100       if (last_error != NULL)
1101         g_error_free (last_error);
1102
1103       /* Right now we don't have any transport not using the listener... */
1104       g_assert (server->is_using_listener);
1105       server->run_signal_handler_id = g_signal_connect (G_SOCKET_SERVICE (server->listener),
1106                                                         "run",
1107                                                         G_CALLBACK (on_run),
1108                                                         server);
1109     }
1110   else
1111     {
1112       g_assert (last_error != NULL);
1113       g_propagate_error (error, last_error);
1114     }
1115   return ret;
1116 }
1117
1118
1119 static void
1120 initable_iface_init (GInitableIface *initable_iface)
1121 {
1122   initable_iface->init = initable_init;
1123 }
1124
1125 /* ---------------------------------------------------------------------------------------------------- */