gio/gnetworkservice.c

   1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
   2
   3 /* GIO - GLib Input, Output and Streaming Library
   4  *
   5  * Copyright (C) 2008 Red Hat, Inc.
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General
  18  * Public License along with this library; if not, write to the
  19  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  20  * Boston, MA 02111-1307, USA.
  21  */
  22
  23 #include "config.h"
  24 #include <glib.h>
  25 #include "glibintl.h"
  26
  27 #include "gnetworkservice.h"
  28
  29 #include "gcancellable.h"
  30 #include "ginetaddress.h"
  31 #include "ginetsocketaddress.h"
  32 #include "gioerror.h"
  33 #include "gnetworkaddress.h"
  34 #include "gnetworkingprivate.h"
  35 #include "gresolver.h"
  36 #include "gtask.h"
  37 #include "gsocketaddressenumerator.h"
  38 #include "gsocketconnectable.h"
  39 #include "gsrvtarget.h"
  40
  41 #include <stdlib.h>
  42 #include <string.h>
  43
  44
  45 /**
  46  * SECTION:gnetworkservice
  47  * @short_description: A GSocketConnectable for resolving SRV records
  48  * @include: gio/gio.h
  49  *
  50  * Like #GNetworkAddress does with hostnames, #GNetworkService
  51  * provides an easy way to resolve a SRV record, and then attempt to
  52  * connect to one of the hosts that implements that service, handling
  53  * service priority/weighting, multiple IP addresses, and multiple
  54  * address families.
  55  *
  56  * See #GSrvTarget for more information about SRV records, and see
  57  * #GSocketConnectable for and example of using the connectable
  58  * interface.
  59  */
  60
  61 /**
  62  * GNetworkService:
  63  *
  64  * A #GSocketConnectable for resolving a SRV record and connecting to
  65  * that service.
  66  */
  67
  68 struct _GNetworkServicePrivate
  69 {
  70   gchar *service, *protocol, *domain, *scheme;
  71   GList *targets;
  72 };
  73
  74 enum {
  75   PROP_0,
  76   PROP_SERVICE,
  77   PROP_PROTOCOL,
  78   PROP_DOMAIN,
  79   PROP_SCHEME
  80 };
  81
  82 static void g_network_service_set_property (GObject      *object,
  83                                             guint         prop_id,
  84                                             const GValue *value,
  85                                             GParamSpec   *pspec);
  86 static void g_network_service_get_property (GObject      *object,
  87                                             guint         prop_id,
  88                                             GValue       *value,
  89                                             GParamSpec   *pspec);
  90
  91 static void                      g_network_service_connectable_iface_init       (GSocketConnectableIface *iface);
  92 static GSocketAddressEnumerator *g_network_service_connectable_enumerate        (GSocketConnectable      *connectable);
  93 static GSocketAddressEnumerator *g_network_service_connectable_proxy_enumerate  (GSocketConnectable      *connectable);
  94
  95 G_DEFINE_TYPE_WITH_CODE (GNetworkService, g_network_service, G_TYPE_OBJECT,
  96                          G_IMPLEMENT_INTERFACE (G_TYPE_SOCKET_CONNECTABLE,
  97                                                 g_network_service_connectable_iface_init))
  98
  99 static void
 100 g_network_service_finalize (GObject *object)
 101 {
 102   GNetworkService *srv = G_NETWORK_SERVICE (object);
 103
 104   g_free (srv->priv->service);
 105   g_free (srv->priv->protocol);
 106   g_free (srv->priv->domain);
 107   g_free (srv->priv->scheme);
 108
 109   if (srv->priv->targets)
 110     g_resolver_free_targets (srv->priv->targets);
 111
 112   G_OBJECT_CLASS (g_network_service_parent_class)->finalize (object);
 113 }
 114
 115 static void
 116 g_network_service_class_init (GNetworkServiceClass *klass)
 117 {
 118   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 119
 120   g_type_class_add_private (klass, sizeof (GNetworkServicePrivate));
 121
 122   gobject_class->set_property = g_network_service_set_property;
 123   gobject_class->get_property = g_network_service_get_property;
 124   gobject_class->finalize = g_network_service_finalize;
 125
 126   g_object_class_install_property (gobject_class, PROP_SERVICE,
 127                                    g_param_spec_string ("service",
 128                                                         P_("Service"),
 129                                                         P_("Service name, eg \"ldap\""),
 130                                                         NULL,
 131                                                         G_PARAM_READWRITE |
 132                                                         G_PARAM_CONSTRUCT_ONLY |
 133                                                         G_PARAM_STATIC_STRINGS));
 134   g_object_class_install_property (gobject_class, PROP_PROTOCOL,
 135                                    g_param_spec_string ("protocol",
 136                                                         P_("Protocol"),
 137                                                         P_("Network protocol, eg \"tcp\""),
 138                                                         NULL,
 139                                                         G_PARAM_READWRITE |
 140                                                         G_PARAM_CONSTRUCT_ONLY |
 141                                                         G_PARAM_STATIC_STRINGS));
 142   g_object_class_install_property (gobject_class, PROP_DOMAIN,
 143                                    g_param_spec_string ("domain",
 144                                                         P_("Domain"),
 145                                                         P_("Network domain, eg, \"example.com\""),
 146                                                         NULL,
 147                                                         G_PARAM_READWRITE |
 148                                                         G_PARAM_CONSTRUCT_ONLY |
 149                                                         G_PARAM_STATIC_STRINGS));
 150   g_object_class_install_property (gobject_class, PROP_DOMAIN,
 151                                    g_param_spec_string ("scheme",
 152                                                         P_("Scheme"),
 153                                                         P_("Network scheme (default is to use service)"),
 154                                                         NULL,
 155                                                         G_PARAM_READWRITE |
 156                                                         G_PARAM_STATIC_STRINGS));
 157
 158 }
 159
 160 static void
 161 g_network_service_connectable_iface_init (GSocketConnectableIface *connectable_iface)
 162 {
 163   connectable_iface->enumerate = g_network_service_connectable_enumerate;
 164   connectable_iface->proxy_enumerate = g_network_service_connectable_proxy_enumerate;
 165 }
 166
 167 static void
 168 g_network_service_init (GNetworkService *srv)
 169 {
 170   srv->priv = G_TYPE_INSTANCE_GET_PRIVATE (srv, G_TYPE_NETWORK_SERVICE,
 171                                            GNetworkServicePrivate);
 172 }
 173
 174 static void
 175 g_network_service_set_property (GObject      *object,
 176                                 guint         prop_id,
 177                                 const GValue *value,
 178                                 GParamSpec   *pspec)
 179 {
 180   GNetworkService *srv = G_NETWORK_SERVICE (object);
 181
 182   switch (prop_id)
 183     {
 184     case PROP_SERVICE:
 185       srv->priv->service = g_value_dup_string (value);
 186       break;
 187
 188     case PROP_PROTOCOL:
 189       srv->priv->protocol = g_value_dup_string (value);
 190       break;
 191
 192     case PROP_DOMAIN:
 193       srv->priv->domain = g_value_dup_string (value);
 194       break;
 195
 196     case PROP_SCHEME:
 197       g_network_service_set_scheme (srv, g_value_get_string (value));
 198       break;
 199
 200     default:
 201       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 202       break;
 203     }
 204 }
 205
 206 static void
 207 g_network_service_get_property (GObject    *object,
 208                                 guint       prop_id,
 209                                 GValue     *value,
 210                                 GParamSpec *pspec)
 211 {
 212   GNetworkService *srv = G_NETWORK_SERVICE (object);
 213
 214   switch (prop_id)
 215     {
 216     case PROP_SERVICE:
 217       g_value_set_string (value, g_network_service_get_service (srv));
 218       break;
 219
 220     case PROP_PROTOCOL:
 221       g_value_set_string (value, g_network_service_get_protocol (srv));
 222       break;
 223
 224     case PROP_DOMAIN:
 225       g_value_set_string (value, g_network_service_get_domain (srv));
 226       break;
 227
 228     case PROP_SCHEME:
 229       g_value_set_string (value, g_network_service_get_scheme (srv));
 230       break;
 231
 232     default:
 233       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 234       break;
 235     }
 236 }
 237
 238 /**
 239  * g_network_service_new:
 240  * @service: the service type to look up (eg, "ldap")
 241  * @protocol: the networking protocol to use for @service (eg, "tcp")
 242  * @domain: the DNS domain to look up the service in
 243  *
 244  * Creates a new #GNetworkService representing the given @service,
 245  * @protocol, and @domain. This will initially be unresolved; use the
 246  * #GSocketConnectable interface to resolve it.
 247  *
 248  * Return value: (transfer full) (type GNetworkService): a new #GNetworkService
 249  *
 250  * Since: 2.22
 251  */
 252 GSocketConnectable *
 253 g_network_service_new (const gchar *service,
 254                        const gchar *protocol,
 255                        const gchar *domain)
 256 {
 257   return g_object_new (G_TYPE_NETWORK_SERVICE,
 258                        "service", service,
 259                        "protocol", protocol,
 260                        "domain", domain,
 261                        NULL);
 262 }
 263
 264 /**
 265  * g_network_service_get_service:
 266  * @srv: a #GNetworkService
 267  *
 268  * Gets @srv's service name (eg, "ldap").
 269  *
 270  * Return value: @srv's service name
 271  *
 272  * Since: 2.22
 273  */
 274 const gchar *
 275 g_network_service_get_service (GNetworkService *srv)
 276 {
 277   g_return_val_if_fail (G_IS_NETWORK_SERVICE (srv), NULL);
 278
 279   return srv->priv->service;
 280 }
 281
 282 /**
 283  * g_network_service_get_protocol:
 284  * @srv: a #GNetworkService
 285  *
 286  * Gets @srv's protocol name (eg, "tcp").
 287  *
 288  * Return value: @srv's protocol name
 289  *
 290  * Since: 2.22
 291  */
 292 const gchar *
 293 g_network_service_get_protocol (GNetworkService *srv)
 294 {
 295   g_return_val_if_fail (G_IS_NETWORK_SERVICE (srv), NULL);
 296
 297   return srv->priv->protocol;
 298 }
 299
 300 /**
 301  * g_network_service_get_domain:
 302  * @srv: a #GNetworkService
 303  *
 304  * Gets the domain that @srv serves. This might be either UTF-8 or
 305  * ASCII-encoded, depending on what @srv was created with.
 306  *
 307  * Return value: @srv's domain name
 308  *
 309  * Since: 2.22
 310  */
 311 const gchar *
 312 g_network_service_get_domain (GNetworkService *srv)
 313 {
 314   g_return_val_if_fail (G_IS_NETWORK_SERVICE (srv), NULL);
 315
 316   return srv->priv->domain;
 317 }
 318
 319 /**
 320  * g_network_service_get_scheme:
 321  * @srv: a #GNetworkService
 322  *
 323  * Get's the URI scheme used to resolve proxies. By default, the service name
 324  * is used as scheme.
 325  *
 326  * Return value: @srv's scheme name
 327  *
 328  * Since: 2.26
 329  */
 330 const gchar *
 331 g_network_service_get_scheme (GNetworkService *srv)
 332 {
 333   g_return_val_if_fail (G_IS_NETWORK_SERVICE (srv), NULL);
 334
 335   if (srv->priv->scheme)
 336     return srv->priv->scheme;
 337   else
 338     return srv->priv->service;
 339 }
 340
 341 /**
 342  * g_network_service_set_scheme:
 343  * @srv: a #GNetworkService
 344  * @scheme: a URI scheme
 345  *
 346  * Set's the URI scheme used to resolve proxies. By default, the service name
 347  * is used as scheme.
 348  *
 349  * Since: 2.26
 350  */
 351 void
 352 g_network_service_set_scheme (GNetworkService *srv,
 353                               const gchar     *scheme)
 354 {
 355   g_return_if_fail (G_IS_NETWORK_SERVICE (srv));
 356
 357   if (srv->priv->scheme)
 358     g_free (srv->priv->scheme);
 359   srv->priv->scheme = g_strdup (scheme);
 360
 361   g_object_notify (G_OBJECT (srv), "scheme");
 362 }
 363
 364 static GList *
 365 g_network_service_fallback_targets (GNetworkService *srv)
 366 {
 367   GSrvTarget *target;
 368   struct servent *entry;
 369   guint16 port;
 370
 371   entry = getservbyname (srv->priv->service, "tcp");
 372   port = entry ? g_ntohs (entry->s_port) : 0;
 373 #ifdef HAVE_ENDSERVENT
 374   endservent ();
 375 #endif
 376
 377   if (entry == NULL)
 378       return NULL;
 379
 380   target = g_srv_target_new (srv->priv->domain, port, 0, 0);
 381   return g_list_append (NULL, target);
 382 }
 383
 384 #define G_TYPE_NETWORK_SERVICE_ADDRESS_ENUMERATOR (_g_network_service_address_enumerator_get_type ())
 385 #define G_NETWORK_SERVICE_ADDRESS_ENUMERATOR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), G_TYPE_NETWORK_SERVICE_ADDRESS_ENUMERATOR, GNetworkServiceAddressEnumerator))
 386
 387 typedef struct {
 388   GSocketAddressEnumerator parent_instance;
 389
 390   GResolver *resolver;
 391   GNetworkService *srv;
 392   GSocketAddressEnumerator *addr_enum;
 393   GList *t;
 394   gboolean use_proxy;
 395
 396   GError *error;
 397
 398 } GNetworkServiceAddressEnumerator;
 399
 400 typedef struct {
 401   GSocketAddressEnumeratorClass parent_class;
 402
 403 } GNetworkServiceAddressEnumeratorClass;
 404
 405 static GType _g_network_service_address_enumerator_get_type (void);
 406 G_DEFINE_TYPE (GNetworkServiceAddressEnumerator, _g_network_service_address_enumerator, G_TYPE_SOCKET_ADDRESS_ENUMERATOR)
 407
 408 static GSocketAddress *
 409 g_network_service_address_enumerator_next (GSocketAddressEnumerator  *enumerator,
 410                                            GCancellable              *cancellable,
 411                                            GError                   **error)
 412 {
 413   GNetworkServiceAddressEnumerator *srv_enum =
 414     G_NETWORK_SERVICE_ADDRESS_ENUMERATOR (enumerator);
 415   GSocketAddress *ret = NULL;
 416
 417   /* If we haven't yet resolved srv, do that */
 418   if (!srv_enum->srv->priv->targets)
 419     {
 420       GList *targets;
 421       GError *my_error = NULL;
 422
 423       targets = g_resolver_lookup_service (srv_enum->resolver,
 424                                            srv_enum->srv->priv->service,
 425                                            srv_enum->srv->priv->protocol,
 426                                            srv_enum->srv->priv->domain,
 427                                            cancellable, &my_error);
 428       if (!targets && g_error_matches (my_error, G_RESOLVER_ERROR,
 429                                        G_RESOLVER_ERROR_NOT_FOUND))
 430         {
 431           targets = g_network_service_fallback_targets (srv_enum->srv);
 432           if (targets)
 433             g_clear_error (&my_error);
 434         }
 435
 436       if (my_error)
 437         {
 438           g_propagate_error (error, my_error);
 439           return NULL;
 440         }
 441
 442       srv_enum->srv->priv->targets = targets;
 443       srv_enum->t = srv_enum->srv->priv->targets;
 444     }
 445
 446   /* Delegate to GNetworkAddress */
 447   do
 448     {
 449       if (srv_enum->addr_enum == NULL && srv_enum->t)
 450         {
 451           GError *error = NULL;
 452           gchar *uri;
 453           gchar *hostname;
 454           GSocketConnectable *addr;
 455           GSrvTarget *target = srv_enum->t->data;
 456
 457           srv_enum->t = g_list_next (srv_enum->t);
 458
 459           hostname = g_hostname_to_ascii (g_srv_target_get_hostname (target));
 460
 461           if (hostname == NULL)
 462             {
 463               if (srv_enum->error == NULL)
 464                 srv_enum->error =
 465                   g_error_new (G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
 466                                "Received invalid hostname '%s' from GSrvTarget",
 467                                g_srv_target_get_hostname (target));
 468               continue;
 469             }
 470
 471           uri = _g_uri_from_authority (g_network_service_get_scheme (srv_enum->srv),
 472                                        hostname,
 473                                        g_srv_target_get_port (target),
 474                                        NULL);
 475           g_free (hostname);
 476
 477           addr = g_network_address_parse_uri (uri,
 478                                               g_srv_target_get_port (target),
 479                                               &error);
 480           g_free (uri);
 481
 482           if (addr == NULL)
 483             {
 484               if (srv_enum->error == NULL)
 485                 srv_enum->error = error;
 486               continue;
 487             }
 488
 489           if (srv_enum->use_proxy)
 490             srv_enum->addr_enum = g_socket_connectable_proxy_enumerate (addr);
 491           else
 492             srv_enum->addr_enum = g_socket_connectable_enumerate (addr);
 493           g_object_unref (addr);
 494         }
 495
 496       if (srv_enum->addr_enum)
 497         {
 498           GError *error = NULL;
 499
 500           ret = g_socket_address_enumerator_next (srv_enum->addr_enum,
 501                                                   cancellable,
 502                                                   &error);
 503
 504           if (error)
 505             {
 506               if (srv_enum->error == NULL)
 507                 srv_enum->error = error;
 508               else
 509                 g_error_free (error);
 510             }
 511
 512           if (!ret)
 513             {
 514               g_object_unref (srv_enum->addr_enum);
 515               srv_enum->addr_enum = NULL;
 516             }
 517         }
 518     }
 519   while (srv_enum->addr_enum == NULL && srv_enum->t);
 520
 521   if (ret == NULL && srv_enum->error)
 522     {
 523       g_propagate_error (error, srv_enum->error);
 524       srv_enum->error = NULL;
 525     }
 526
 527   return ret;
 528 }
 529
 530 static void next_async_resolved_targets   (GObject      *source_object,
 531                                            GAsyncResult *result,
 532                                            gpointer      user_data);
 533 static void next_async_have_targets       (GTask        *srv_enum);
 534 static void next_async_have_address       (GObject      *source_object,
 535                                            GAsyncResult *result,
 536                                            gpointer      user_data);
 537
 538 static void
 539 g_network_service_address_enumerator_next_async (GSocketAddressEnumerator  *enumerator,
 540                                                  GCancellable              *cancellable,
 541                                                  GAsyncReadyCallback        callback,
 542                                                  gpointer                   user_data)
 543 {
 544   GNetworkServiceAddressEnumerator *srv_enum =
 545     G_NETWORK_SERVICE_ADDRESS_ENUMERATOR (enumerator);
 546   GTask *task;
 547
 548   task = g_task_new (enumerator, cancellable, callback, user_data);
 549
 550   /* If we haven't yet resolved srv, do that */
 551   if (!srv_enum->srv->priv->targets)
 552     {
 553       g_resolver_lookup_service_async (srv_enum->resolver,
 554                                        srv_enum->srv->priv->service,
 555                                        srv_enum->srv->priv->protocol,
 556                                        srv_enum->srv->priv->domain,
 557                                        cancellable,
 558                                        next_async_resolved_targets,
 559                                        task);
 560     }
 561   else
 562     next_async_have_targets (task);
 563 }
 564
 565 static void
 566 next_async_resolved_targets (GObject      *source_object,
 567                              GAsyncResult *result,
 568                              gpointer      user_data)
 569 {
 570   GTask *task = user_data;
 571   GNetworkServiceAddressEnumerator *srv_enum = g_task_get_source_object (task);
 572   GError *error = NULL;
 573   GList *targets;
 574
 575   targets = g_resolver_lookup_service_finish (srv_enum->resolver,
 576                                               result, &error);
 577
 578   if (!targets && g_error_matches (error, G_RESOLVER_ERROR,
 579                                    G_RESOLVER_ERROR_NOT_FOUND))
 580     {
 581       targets = g_network_service_fallback_targets (srv_enum->srv);
 582       if (targets)
 583         g_clear_error (&error);
 584     }
 585
 586   if (error)
 587     {
 588       g_task_return_error (task, error);
 589       g_object_unref (task);
 590     }
 591   else
 592     {
 593       srv_enum->t = srv_enum->srv->priv->targets = targets;
 594       next_async_have_targets (task);
 595     }
 596 }
 597
 598 static void
 599 next_async_have_targets (GTask *task)
 600 {
 601   GNetworkServiceAddressEnumerator *srv_enum = g_task_get_source_object (task);
 602
 603   /* Delegate to GNetworkAddress */
 604   if (srv_enum->addr_enum == NULL && srv_enum->t)
 605     {
 606       GSocketConnectable *addr;
 607       GSrvTarget *target = srv_enum->t->data;
 608
 609       srv_enum->t = g_list_next (srv_enum->t);
 610       addr = g_network_address_new (g_srv_target_get_hostname (target),
 611                                     (guint16) g_srv_target_get_port (target));
 612
 613       if (srv_enum->use_proxy)
 614         srv_enum->addr_enum = g_socket_connectable_proxy_enumerate (addr);
 615       else
 616         srv_enum->addr_enum = g_socket_connectable_enumerate (addr);
 617
 618       g_object_unref (addr);
 619     }
 620
 621   if (srv_enum->addr_enum)
 622     {
 623       g_socket_address_enumerator_next_async (srv_enum->addr_enum,
 624                                               g_task_get_cancellable (task),
 625                                               next_async_have_address,
 626                                               task);
 627     }
 628   else
 629     {
 630       if (srv_enum->error)
 631         {
 632           g_task_return_error (task, srv_enum->error);
 633           srv_enum->error = NULL;
 634         }
 635       else
 636         g_task_return_pointer (task, NULL, NULL);
 637
 638       g_object_unref (task);
 639     }
 640 }
 641
 642 static void
 643 next_async_have_address (GObject      *source_object,
 644                          GAsyncResult *result,
 645                          gpointer      user_data)
 646 {
 647   GTask *task = user_data;
 648   GNetworkServiceAddressEnumerator *srv_enum = g_task_get_source_object (task);
 649   GSocketAddress *address;
 650   GError *error = NULL;
 651
 652   address = g_socket_address_enumerator_next_finish (srv_enum->addr_enum,
 653                                                      result,
 654                                                      &error);
 655
 656   if (error)
 657     {
 658       if (srv_enum->error == NULL)
 659         srv_enum->error = error;
 660       else
 661         g_error_free (error);
 662     }
 663
 664   if (!address)
 665     {
 666       g_object_unref (srv_enum->addr_enum);
 667       srv_enum->addr_enum = NULL;
 668
 669       next_async_have_targets (task);
 670     }
 671   else
 672     {
 673       g_task_return_pointer (task, address, g_object_unref);
 674       g_object_unref (task);
 675     }
 676 }
 677
 678 static GSocketAddress *
 679 g_network_service_address_enumerator_next_finish (GSocketAddressEnumerator  *enumerator,
 680                                                   GAsyncResult              *result,
 681                                                   GError                   **error)
 682 {
 683   return g_task_propagate_pointer (G_TASK (result), error);
 684 }
 685
 686 static void
 687 _g_network_service_address_enumerator_init (GNetworkServiceAddressEnumerator *enumerator)
 688 {
 689 }
 690
 691 static void
 692 g_network_service_address_enumerator_finalize (GObject *object)
 693 {
 694   GNetworkServiceAddressEnumerator *srv_enum =
 695     G_NETWORK_SERVICE_ADDRESS_ENUMERATOR (object);
 696
 697   if (srv_enum->srv)
 698     g_object_unref (srv_enum->srv);
 699
 700   if (srv_enum->addr_enum)
 701     g_object_unref (srv_enum->addr_enum);
 702
 703   if (srv_enum->resolver)
 704     g_object_unref (srv_enum->resolver);
 705
 706   if (srv_enum->error)
 707     g_error_free (srv_enum->error);
 708
 709   G_OBJECT_CLASS (_g_network_service_address_enumerator_parent_class)->finalize (object);
 710 }
 711
 712 static void
 713 _g_network_service_address_enumerator_class_init (GNetworkServiceAddressEnumeratorClass *srvenum_class)
 714 {
 715   GObjectClass *object_class = G_OBJECT_CLASS (srvenum_class);
 716   GSocketAddressEnumeratorClass *enumerator_class =
 717     G_SOCKET_ADDRESS_ENUMERATOR_CLASS (srvenum_class);
 718
 719   enumerator_class->next        = g_network_service_address_enumerator_next;
 720   enumerator_class->next_async  = g_network_service_address_enumerator_next_async;
 721   enumerator_class->next_finish = g_network_service_address_enumerator_next_finish;
 722
 723   object_class->finalize = g_network_service_address_enumerator_finalize;
 724 }
 725
 726 static GSocketAddressEnumerator *
 727 g_network_service_connectable_enumerate (GSocketConnectable *connectable)
 728 {
 729   GNetworkServiceAddressEnumerator *srv_enum;
 730
 731   srv_enum = g_object_new (G_TYPE_NETWORK_SERVICE_ADDRESS_ENUMERATOR, NULL);
 732   srv_enum->srv = g_object_ref (connectable);
 733   srv_enum->resolver = g_resolver_get_default ();
 734   srv_enum->use_proxy = FALSE;
 735
 736   return G_SOCKET_ADDRESS_ENUMERATOR (srv_enum);
 737 }
 738
 739 static GSocketAddressEnumerator *
 740 g_network_service_connectable_proxy_enumerate (GSocketConnectable *connectable)
 741 {
 742   GSocketAddressEnumerator *addr_enum;
 743   GNetworkServiceAddressEnumerator *srv_enum;
 744
 745   addr_enum = g_network_service_connectable_enumerate (connectable);
 746   srv_enum = G_NETWORK_SERVICE_ADDRESS_ENUMERATOR (addr_enum);
 747   srv_enum->use_proxy = TRUE;
 748
 749   return addr_enum;
 750 }