gio/gsocketclient.c

   1 /*  GIO - GLib Input, Output and Streaming Library
   2  *
   3  * Copyright © 2008, 2009 codethink
   4  * Copyright © 2009 Red Hat, Inc
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General
  17  * Public License along with this library; if not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  *
  21  * Authors: Ryan Lortie <desrt@desrt.ca>
  22  *          Alexander Larsson <alexl@redhat.com>
  23  */
  24
  25 #include "config.h"
  26 #include "gsocketclient.h"
  27
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #include <gio/gioenumtypes.h>
  32 #include <gio/gsocketaddressenumerator.h>
  33 #include <gio/gsocketconnectable.h>
  34 #include <gio/gsocketconnection.h>
  35 #include <gio/gproxyaddressenumerator.h>
  36 #include <gio/gproxyaddress.h>
  37 #include <gio/gsimpleasyncresult.h>
  38 #include <gio/gcancellable.h>
  39 #include <gio/gioerror.h>
  40 #include <gio/gsocket.h>
  41 #include <gio/gnetworkaddress.h>
  42 #include <gio/gnetworkservice.h>
  43 #include <gio/gproxy.h>
  44 #include <gio/gsocketaddress.h>
  45 #include <gio/gtcpconnection.h>
  46 #include <gio/gtcpwrapperconnection.h>
  47 #include <gio/gtlscertificate.h>
  48 #include <gio/gtlsclientconnection.h>
  49 #include <gio/ginetaddress.h>
  50 #include "glibintl.h"
  51
  52
  53 /**
  54  * SECTION:gsocketclient
  55  * @short_description: Helper for connecting to a network service
  56  * @include: gio/gio.h
  57  * @see_also: #GSocketConnection, #GSocketListener
  58  *
  59  * #GSocketClient is a high-level utility class for connecting to a
  60  * network host using a connection oriented socket type.
  61  *
  62  * You create a #GSocketClient object, set any options you want, and then
  63  * call a sync or async connect operation, which returns a #GSocketConnection
  64  * subclass on success.
  65  *
  66  * The type of the #GSocketConnection object returned depends on the type of
  67  * the underlying socket that is in use. For instance, for a TCP/IP connection
  68  * it will be a #GTcpConnection.
  69  *
  70  * Since: 2.22
  71  */
  72
  73
  74 G_DEFINE_TYPE (GSocketClient, g_socket_client, G_TYPE_OBJECT);
  75
  76 enum
  77 {
  78   PROP_NONE,
  79   PROP_FAMILY,
  80   PROP_TYPE,
  81   PROP_PROTOCOL,
  82   PROP_LOCAL_ADDRESS,
  83   PROP_TIMEOUT,
  84   PROP_ENABLE_PROXY,
  85   PROP_TLS,
  86   PROP_TLS_VALIDATION_FLAGS
  87 };
  88
  89 struct _GSocketClientPrivate
  90 {
  91   GSocketFamily family;
  92   GSocketType type;
  93   GSocketProtocol protocol;
  94   GSocketAddress *local_address;
  95   guint timeout;
  96   gboolean enable_proxy;
  97   GHashTable *app_proxies;
  98   gboolean tls;
  99   GTlsCertificateFlags tls_validation_flags;
 100 };
 101
 102 static GSocket *
 103 create_socket (GSocketClient  *client,
 104                GSocketAddress *dest_address,
 105                GError        **error)
 106 {
 107   GSocketFamily family;
 108   GSocket *socket;
 109
 110   family = client->priv->family;
 111   if (family == G_SOCKET_FAMILY_INVALID &&
 112       client->priv->local_address != NULL)
 113     family = g_socket_address_get_family (client->priv->local_address);
 114   if (family == G_SOCKET_FAMILY_INVALID)
 115     family = g_socket_address_get_family (dest_address);
 116
 117   socket = g_socket_new (family,
 118                          client->priv->type,
 119                          client->priv->protocol,
 120                          error);
 121   if (socket == NULL)
 122     return NULL;
 123
 124   if (client->priv->local_address)
 125     {
 126       if (!g_socket_bind (socket,
 127                           client->priv->local_address,
 128                           FALSE,
 129                           error))
 130         {
 131           g_object_unref (socket);
 132           return NULL;
 133         }
 134     }
 135
 136   if (client->priv->timeout)
 137     g_socket_set_timeout (socket, client->priv->timeout);
 138
 139   return socket;
 140 }
 141
 142 static gboolean
 143 can_use_proxy (GSocketClient *client)
 144 {
 145   GSocketClientPrivate *priv = client->priv;
 146
 147   return priv->enable_proxy
 148           && priv->type == G_SOCKET_TYPE_STREAM;
 149 }
 150
 151 static void
 152 clarify_connect_error (GError             *error,
 153                        GSocketConnectable *connectable,
 154                        GSocketAddress     *address)
 155 {
 156   const char *name;
 157   char *tmp_name = NULL;
 158
 159   if (G_IS_PROXY_ADDRESS (address))
 160     {
 161       name = tmp_name = g_inet_address_to_string (g_inet_socket_address_get_address (G_INET_SOCKET_ADDRESS (address)));
 162
 163       g_prefix_error (&error, _("Could not connect to proxy server %s: "), name);
 164     }
 165   else
 166     {
 167       if (G_IS_NETWORK_ADDRESS (connectable))
 168         name = g_network_address_get_hostname (G_NETWORK_ADDRESS (connectable));
 169       else if (G_IS_NETWORK_SERVICE (connectable))
 170         name = g_network_service_get_domain (G_NETWORK_SERVICE (connectable));
 171       else if (G_IS_INET_SOCKET_ADDRESS (connectable))
 172         name = tmp_name = g_inet_address_to_string (g_inet_socket_address_get_address (G_INET_SOCKET_ADDRESS (connectable)));
 173       else
 174         name = NULL;
 175
 176       if (name)
 177         g_prefix_error (&error, _("Could not connect to %s: "), name);
 178       else
 179         g_prefix_error (&error, _("Could not connect: "));
 180     }
 181
 182   g_free (tmp_name);
 183 }
 184
 185 static void
 186 g_socket_client_init (GSocketClient *client)
 187 {
 188   client->priv = G_TYPE_INSTANCE_GET_PRIVATE (client,
 189                                               G_TYPE_SOCKET_CLIENT,
 190                                               GSocketClientPrivate);
 191   client->priv->type = G_SOCKET_TYPE_STREAM;
 192   client->priv->app_proxies = g_hash_table_new_full (g_str_hash,
 193                                                      g_str_equal,
 194                                                      g_free,
 195                                                      NULL);
 196 }
 197
 198 /**
 199  * g_socket_client_new:
 200  *
 201  * Creates a new #GSocketClient with the default options.
 202  *
 203  * Returns: a #GSocketClient.
 204  *     Free the returned object with g_object_unref().
 205  *
 206  * Since: 2.22
 207  */
 208 GSocketClient *
 209 g_socket_client_new (void)
 210 {
 211   return g_object_new (G_TYPE_SOCKET_CLIENT, NULL);
 212 }
 213
 214 static void
 215 g_socket_client_finalize (GObject *object)
 216 {
 217   GSocketClient *client = G_SOCKET_CLIENT (object);
 218
 219   if (client->priv->local_address)
 220     g_object_unref (client->priv->local_address);
 221
 222   if (G_OBJECT_CLASS (g_socket_client_parent_class)->finalize)
 223     (*G_OBJECT_CLASS (g_socket_client_parent_class)->finalize) (object);
 224
 225   g_hash_table_unref (client->priv->app_proxies);
 226 }
 227
 228 static void
 229 g_socket_client_get_property (GObject    *object,
 230                               guint       prop_id,
 231                               GValue     *value,
 232                               GParamSpec *pspec)
 233 {
 234   GSocketClient *client = G_SOCKET_CLIENT (object);
 235
 236   switch (prop_id)
 237     {
 238       case PROP_FAMILY:
 239         g_value_set_enum (value, client->priv->family);
 240         break;
 241
 242       case PROP_TYPE:
 243         g_value_set_enum (value, client->priv->type);
 244         break;
 245
 246       case PROP_PROTOCOL:
 247         g_value_set_enum (value, client->priv->protocol);
 248         break;
 249
 250       case PROP_LOCAL_ADDRESS:
 251         g_value_set_object (value, client->priv->local_address);
 252         break;
 253
 254       case PROP_TIMEOUT:
 255         g_value_set_uint (value, client->priv->timeout);
 256         break;
 257
 258       case PROP_ENABLE_PROXY:
 259         g_value_set_boolean (value, client->priv->enable_proxy);
 260         break;
 261
 262       case PROP_TLS:
 263         g_value_set_boolean (value, g_socket_client_get_tls (client));
 264         break;
 265
 266       case PROP_TLS_VALIDATION_FLAGS:
 267         g_value_set_flags (value, g_socket_client_get_tls_validation_flags (client));
 268         break;
 269
 270       default:
 271         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 272     }
 273 }
 274
 275 static void
 276 g_socket_client_set_property (GObject      *object,
 277                               guint         prop_id,
 278                               const GValue *value,
 279                               GParamSpec   *pspec)
 280 {
 281   GSocketClient *client = G_SOCKET_CLIENT (object);
 282
 283   switch (prop_id)
 284     {
 285     case PROP_FAMILY:
 286       g_socket_client_set_family (client, g_value_get_enum (value));
 287       break;
 288
 289     case PROP_TYPE:
 290       g_socket_client_set_socket_type (client, g_value_get_enum (value));
 291       break;
 292
 293     case PROP_PROTOCOL:
 294       g_socket_client_set_protocol (client, g_value_get_enum (value));
 295       break;
 296
 297     case PROP_LOCAL_ADDRESS:
 298       g_socket_client_set_local_address (client, g_value_get_object (value));
 299       break;
 300
 301     case PROP_TIMEOUT:
 302       g_socket_client_set_timeout (client, g_value_get_uint (value));
 303       break;
 304
 305     case PROP_ENABLE_PROXY:
 306       g_socket_client_set_enable_proxy (client, g_value_get_boolean (value));
 307       break;
 308
 309     case PROP_TLS:
 310       g_socket_client_set_tls (client, g_value_get_boolean (value));
 311       break;
 312
 313     case PROP_TLS_VALIDATION_FLAGS:
 314       g_socket_client_set_tls_validation_flags (client, g_value_get_flags (value));
 315       break;
 316
 317     default:
 318       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 319     }
 320 }
 321
 322 /**
 323  * g_socket_client_get_family:
 324  * @client: a #GSocketClient.
 325  *
 326  * Gets the socket family of the socket client.
 327  *
 328  * See g_socket_client_set_family() for details.
 329  *
 330  * Returns: a #GSocketFamily
 331  *
 332  * Since: 2.22
 333  */
 334 GSocketFamily
 335 g_socket_client_get_family (GSocketClient *client)
 336 {
 337   return client->priv->family;
 338 }
 339
 340 /**
 341  * g_socket_client_set_family:
 342  * @client: a #GSocketClient.
 343  * @family: a #GSocketFamily
 344  *
 345  * Sets the socket family of the socket client.
 346  * If this is set to something other than %G_SOCKET_FAMILY_INVALID
 347  * then the sockets created by this object will be of the specified
 348  * family.
 349  *
 350  * This might be useful for instance if you want to force the local
 351  * connection to be an ipv4 socket, even though the address might
 352  * be an ipv6 mapped to ipv4 address.
 353  *
 354  * Since: 2.22
 355  */
 356 void
 357 g_socket_client_set_family (GSocketClient *client,
 358                             GSocketFamily  family)
 359 {
 360   if (client->priv->family == family)
 361     return;
 362
 363   client->priv->family = family;
 364   g_object_notify (G_OBJECT (client), "family");
 365 }
 366
 367 /**
 368  * g_socket_client_get_socket_type:
 369  * @client: a #GSocketClient.
 370  *
 371  * Gets the socket type of the socket client.
 372  *
 373  * See g_socket_client_set_socket_type() for details.
 374  *
 375  * Returns: a #GSocketFamily
 376  *
 377  * Since: 2.22
 378  */
 379 GSocketType
 380 g_socket_client_get_socket_type (GSocketClient *client)
 381 {
 382   return client->priv->type;
 383 }
 384
 385 /**
 386  * g_socket_client_set_socket_type:
 387  * @client: a #GSocketClient.
 388  * @type: a #GSocketType
 389  *
 390  * Sets the socket type of the socket client.
 391  * The sockets created by this object will be of the specified
 392  * type.
 393  *
 394  * It doesn't make sense to specify a type of %G_SOCKET_TYPE_DATAGRAM,
 395  * as GSocketClient is used for connection oriented services.
 396  *
 397  * Since: 2.22
 398  */
 399 void
 400 g_socket_client_set_socket_type (GSocketClient *client,
 401                                  GSocketType    type)
 402 {
 403   if (client->priv->type == type)
 404     return;
 405
 406   client->priv->type = type;
 407   g_object_notify (G_OBJECT (client), "type");
 408 }
 409
 410 /**
 411  * g_socket_client_get_protocol:
 412  * @client: a #GSocketClient
 413  *
 414  * Gets the protocol name type of the socket client.
 415  *
 416  * See g_socket_client_set_protocol() for details.
 417  *
 418  * Returns: a #GSocketProtocol
 419  *
 420  * Since: 2.22
 421  */
 422 GSocketProtocol
 423 g_socket_client_get_protocol (GSocketClient *client)
 424 {
 425   return client->priv->protocol;
 426 }
 427
 428 /**
 429  * g_socket_client_set_protocol:
 430  * @client: a #GSocketClient.
 431  * @protocol: a #GSocketProtocol
 432  *
 433  * Sets the protocol of the socket client.
 434  * The sockets created by this object will use of the specified
 435  * protocol.
 436  *
 437  * If @protocol is %0 that means to use the default
 438  * protocol for the socket family and type.
 439  *
 440  * Since: 2.22
 441  */
 442 void
 443 g_socket_client_set_protocol (GSocketClient   *client,
 444                               GSocketProtocol  protocol)
 445 {
 446   if (client->priv->protocol == protocol)
 447     return;
 448
 449   client->priv->protocol = protocol;
 450   g_object_notify (G_OBJECT (client), "protocol");
 451 }
 452
 453 /**
 454  * g_socket_client_get_local_address:
 455  * @client: a #GSocketClient.
 456  *
 457  * Gets the local address of the socket client.
 458  *
 459  * See g_socket_client_set_local_address() for details.
 460  *
 461  * Returns: (transfer none): a #GSocketAddress or %NULL. Do not free.
 462  *
 463  * Since: 2.22
 464  */
 465 GSocketAddress *
 466 g_socket_client_get_local_address (GSocketClient *client)
 467 {
 468   return client->priv->local_address;
 469 }
 470
 471 /**
 472  * g_socket_client_set_local_address:
 473  * @client: a #GSocketClient.
 474  * @address: a #GSocketAddress, or %NULL
 475  *
 476  * Sets the local address of the socket client.
 477  * The sockets created by this object will bound to the
 478  * specified address (if not %NULL) before connecting.
 479  *
 480  * This is useful if you want to ensure that the local
 481  * side of the connection is on a specific port, or on
 482  * a specific interface.
 483  *
 484  * Since: 2.22
 485  */
 486 void
 487 g_socket_client_set_local_address (GSocketClient  *client,
 488                                    GSocketAddress *address)
 489 {
 490   if (address)
 491     g_object_ref (address);
 492
 493   if (client->priv->local_address)
 494     {
 495       g_object_unref (client->priv->local_address);
 496     }
 497   client->priv->local_address = address;
 498   g_object_notify (G_OBJECT (client), "local-address");
 499 }
 500
 501 /**
 502  * g_socket_client_get_timeout:
 503  * @client: a #GSocketClient
 504  *
 505  * Gets the I/O timeout time for sockets created by @client.
 506  *
 507  * See g_socket_client_set_timeout() for details.
 508  *
 509  * Returns: the timeout in seconds
 510  *
 511  * Since: 2.26
 512  */
 513 guint
 514 g_socket_client_get_timeout (GSocketClient *client)
 515 {
 516   return client->priv->timeout;
 517 }
 518
 519
 520 /**
 521  * g_socket_client_set_timeout:
 522  * @client: a #GSocketClient.
 523  * @timeout: the timeout
 524  *
 525  * Sets the I/O timeout for sockets created by @client. @timeout is a
 526  * time in seconds, or 0 for no timeout (the default).
 527  *
 528  * The timeout value affects the initial connection attempt as well,
 529  * so setting this may cause calls to g_socket_client_connect(), etc,
 530  * to fail with %G_IO_ERROR_TIMED_OUT.
 531  *
 532  * Since: 2.26
 533  */
 534 void
 535 g_socket_client_set_timeout (GSocketClient *client,
 536                              guint          timeout)
 537 {
 538   if (client->priv->timeout == timeout)
 539     return;
 540
 541   client->priv->timeout = timeout;
 542   g_object_notify (G_OBJECT (client), "timeout");
 543 }
 544
 545 /**
 546  * g_socket_client_get_enable_proxy:
 547  * @client: a #GSocketClient.
 548  *
 549  * Gets the proxy enable state; see g_socket_client_set_enable_proxy()
 550  *
 551  * Returns: whether proxying is enabled
 552  *
 553  * Since: 2.26
 554  */
 555 gboolean
 556 g_socket_client_get_enable_proxy (GSocketClient *client)
 557 {
 558   return client->priv->enable_proxy;
 559 }
 560
 561 /**
 562  * g_socket_client_set_enable_proxy:
 563  * @client: a #GSocketClient.
 564  * @enable: whether to enable proxies
 565  *
 566  * Sets whether or not @client attempts to make connections via a
 567  * proxy server. When enabled (the default), #GSocketClient will use a
 568  * #GProxyResolver to determine if a proxy protocol such as SOCKS is
 569  * needed, and automatically do the necessary proxy negotiation.
 570  *
 571  * Since: 2.26
 572  */
 573 void
 574 g_socket_client_set_enable_proxy (GSocketClient *client,
 575                                   gboolean       enable)
 576 {
 577   enable = !!enable;
 578   if (client->priv->enable_proxy == enable)
 579     return;
 580
 581   client->priv->enable_proxy = enable;
 582   g_object_notify (G_OBJECT (client), "enable-proxy");
 583 }
 584
 585 /**
 586  * g_socket_client_get_tls:
 587  * @client: a #GSocketClient.
 588  *
 589  * Gets whether @client creates TLS connections. See
 590  * g_socket_client_set_tls() for details.
 591  *
 592  * Returns: whether @client uses TLS
 593  *
 594  * Since: 2.28
 595  */
 596 gboolean
 597 g_socket_client_get_tls (GSocketClient *client)
 598 {
 599   return client->priv->tls;
 600 }
 601
 602 /**
 603  * g_socket_client_set_tls:
 604  * @client: a #GSocketClient.
 605  * @tls: whether to use TLS
 606  *
 607  * Sets whether @client creates TLS (aka SSL) connections. If @tls is
 608  * %TRUE, @client will wrap its connections in a #GTlsClientConnection
 609  * and perform a TLS handshake when connecting.
 610  *
 611  * Note that since #GSocketClient must return a #GSocketConnection,
 612  * but #GTlsClientConnection is not a #GSocketConnection, this
 613  * actually wraps the resulting #GTlsClientConnection in a
 614  * #GTcpWrapperConnection when returning it. You can use
 615  * g_tcp_wrapper_connection_get_base_io_stream() on the return value
 616  * to extract the #GTlsClientConnection.
 617  *
 618  * Since: 2.28
 619  */
 620 void
 621 g_socket_client_set_tls (GSocketClient *client,
 622                          gboolean       tls)
 623 {
 624   tls = !!tls;
 625   if (tls == client->priv->tls)
 626     return;
 627
 628   client->priv->tls = tls;
 629   g_object_notify (G_OBJECT (client), "tls");
 630 }
 631
 632 /**
 633  * g_socket_client_get_tls_validation_flags:
 634  * @client: a #GSocketClient.
 635  *
 636  * Gets the TLS validation flags used creating TLS connections via
 637  * @client.
 638  *
 639  * Returns: the TLS validation flags
 640  *
 641  * Since: 2.28
 642  */
 643 GTlsCertificateFlags
 644 g_socket_client_get_tls_validation_flags (GSocketClient *client)
 645 {
 646   return client->priv->tls_validation_flags;
 647 }
 648
 649 /**
 650  * g_socket_client_set_tls_validation_flags:
 651  * @client: a #GSocketClient.
 652  * @flags: the validation flags
 653  *
 654  * Sets the TLS validation flags used when creating TLS connections
 655  * via @client. The default value is %G_TLS_CERTIFICATE_VALIDATE_ALL.
 656  *
 657  * Since: 2.28
 658  */
 659 void
 660 g_socket_client_set_tls_validation_flags (GSocketClient        *client,
 661                                           GTlsCertificateFlags  flags)
 662 {
 663   if (client->priv->tls_validation_flags != flags)
 664     {
 665       client->priv->tls_validation_flags = flags;
 666       g_object_notify (G_OBJECT (client), "tls-validation-flags");
 667     }
 668 }
 669
 670 static void
 671 g_socket_client_class_init (GSocketClientClass *class)
 672 {
 673   GObjectClass *gobject_class = G_OBJECT_CLASS (class);
 674
 675   g_type_class_add_private (class, sizeof (GSocketClientPrivate));
 676
 677   gobject_class->finalize = g_socket_client_finalize;
 678   gobject_class->set_property = g_socket_client_set_property;
 679   gobject_class->get_property = g_socket_client_get_property;
 680
 681   g_object_class_install_property (gobject_class, PROP_FAMILY,
 682                                    g_param_spec_enum ("family",
 683                                                       P_("Socket family"),
 684                                                       P_("The sockets address family to use for socket construction"),
 685                                                       G_TYPE_SOCKET_FAMILY,
 686                                                       G_SOCKET_FAMILY_INVALID,
 687                                                       G_PARAM_CONSTRUCT |
 688                                                       G_PARAM_READWRITE |
 689                                                       G_PARAM_STATIC_STRINGS));
 690
 691   g_object_class_install_property (gobject_class, PROP_TYPE,
 692                                    g_param_spec_enum ("type",
 693                                                       P_("Socket type"),
 694                                                       P_("The sockets type to use for socket construction"),
 695                                                       G_TYPE_SOCKET_TYPE,
 696                                                       G_SOCKET_TYPE_STREAM,
 697                                                       G_PARAM_CONSTRUCT |
 698                                                       G_PARAM_READWRITE |
 699                                                       G_PARAM_STATIC_STRINGS));
 700
 701   g_object_class_install_property (gobject_class, PROP_PROTOCOL,
 702                                    g_param_spec_enum ("protocol",
 703                                                       P_("Socket protocol"),
 704                                                       P_("The protocol to use for socket construction, or 0 for default"),
 705                                                       G_TYPE_SOCKET_PROTOCOL,
 706                                                       G_SOCKET_PROTOCOL_DEFAULT,
 707                                                       G_PARAM_CONSTRUCT |
 708                                                       G_PARAM_READWRITE |
 709                                                       G_PARAM_STATIC_STRINGS));
 710
 711   g_object_class_install_property (gobject_class, PROP_LOCAL_ADDRESS,
 712                                    g_param_spec_object ("local-address",
 713                                                         P_("Local address"),
 714                                                         P_("The local address constructed sockets will be bound to"),
 715                                                         G_TYPE_SOCKET_ADDRESS,
 716                                                         G_PARAM_CONSTRUCT |
 717                                                         G_PARAM_READWRITE |
 718                                                         G_PARAM_STATIC_STRINGS));
 719
 720   g_object_class_install_property (gobject_class, PROP_TIMEOUT,
 721                                    g_param_spec_uint ("timeout",
 722                                                       P_("Socket timeout"),
 723                                                       P_("The I/O timeout for sockets, or 0 for none"),
 724                                                       0, G_MAXUINT, 0,
 725                                                       G_PARAM_CONSTRUCT |
 726                                                       G_PARAM_READWRITE |
 727                                                       G_PARAM_STATIC_STRINGS));
 728
 729    g_object_class_install_property (gobject_class, PROP_ENABLE_PROXY,
 730                                     g_param_spec_boolean ("enable-proxy",
 731                                                           P_("Enable proxy"),
 732                                                           P_("Enable proxy support"),
 733                                                           TRUE,
 734                                                           G_PARAM_CONSTRUCT |
 735                                                           G_PARAM_READWRITE |
 736                                                           G_PARAM_STATIC_STRINGS));
 737
 738   g_object_class_install_property (gobject_class, PROP_TLS,
 739                                    g_param_spec_boolean ("tls",
 740                                                          P_("TLS"),
 741                                                          P_("Whether to create TLS connections"),
 742                                                          FALSE,
 743                                                          G_PARAM_CONSTRUCT |
 744                                                          G_PARAM_READWRITE |
 745                                                          G_PARAM_STATIC_STRINGS));
 746   g_object_class_install_property (gobject_class, PROP_TLS_VALIDATION_FLAGS,
 747                                    g_param_spec_flags ("tls-validation-flags",
 748                                                        P_("TLS validation flags"),
 749                                                        P_("TLS validation flags to use"),
 750                                                        G_TYPE_TLS_CERTIFICATE_FLAGS,
 751                                                        G_TLS_CERTIFICATE_VALIDATE_ALL,
 752                                                        G_PARAM_CONSTRUCT |
 753                                                        G_PARAM_READWRITE |
 754                                                        G_PARAM_STATIC_STRINGS));
 755 }
 756
 757 /**
 758  * g_socket_client_connect:
 759  * @client: a #GSocketClient.
 760  * @connectable: a #GSocketConnectable specifying the remote address.
 761  * @cancellable: (allow-none): optional #GCancellable object, %NULL to ignore.
 762  * @error: #GError for error reporting, or %NULL to ignore.
 763  *
 764  * Tries to resolve the @connectable and make a network connection to it.
 765  *
 766  * Upon a successful connection, a new #GSocketConnection is constructed
 767  * and returned.  The caller owns this new object and must drop their
 768  * reference to it when finished with it.
 769  *
 770  * The type of the #GSocketConnection object returned depends on the type of
 771  * the underlying socket that is used. For instance, for a TCP/IP connection
 772  * it will be a #GTcpConnection.
 773  *
 774  * The socket created will be the same family as the address that the
 775  * @connectable resolves to, unless family is set with g_socket_client_set_family()
 776  * or indirectly via g_socket_client_set_local_address(). The socket type
 777  * defaults to %G_SOCKET_TYPE_STREAM but can be set with
 778  * g_socket_client_set_socket_type().
 779  *
 780  * If a local address is specified with g_socket_client_set_local_address() the
 781  * socket will be bound to this address before connecting.
 782  *
 783  * Returns: (transfer full): a #GSocketConnection on success, %NULL on error.
 784  *
 785  * Since: 2.22
 786  */
 787 GSocketConnection *
 788 g_socket_client_connect (GSocketClient       *client,
 789                          GSocketConnectable  *connectable,
 790                          GCancellable        *cancellable,
 791                          GError             **error)
 792 {
 793   GIOStream *connection = NULL;
 794   GSocketAddressEnumerator *enumerator = NULL;
 795   GError *last_error, *tmp_error;
 796
 797   last_error = NULL;
 798
 799   if (can_use_proxy (client))
 800     enumerator = g_socket_connectable_proxy_enumerate (connectable);
 801   else
 802     enumerator = g_socket_connectable_enumerate (connectable);
 803
 804   while (connection == NULL)
 805     {
 806       GSocketAddress *address = NULL;
 807       gboolean application_proxy = FALSE;
 808       GSocket *socket;
 809
 810       if (g_cancellable_is_cancelled (cancellable))
 811         {
 812           g_clear_error (error);
 813           g_cancellable_set_error_if_cancelled (cancellable, error);
 814           break;
 815         }
 816
 817       tmp_error = NULL;
 818       address = g_socket_address_enumerator_next (enumerator, cancellable,
 819                                                   &tmp_error);
 820
 821       if (address == NULL)
 822         {
 823           if (tmp_error)
 824             {
 825               g_clear_error (&last_error);
 826               g_propagate_error (error, tmp_error);
 827             }
 828           else if (last_error)
 829             {
 830               g_propagate_error (error, last_error);
 831             }
 832           else
 833             g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_FAILED,
 834                                  _("Unknown error on connect"));
 835           break;
 836         }
 837
 838       /* clear error from previous attempt */
 839       g_clear_error (&last_error);
 840
 841       socket = create_socket (client, address, &last_error);
 842       if (socket == NULL)
 843         {
 844           g_object_unref (address);
 845           continue;
 846         }
 847
 848       connection = (GIOStream *)g_socket_connection_factory_create_connection (socket);
 849       if (!g_socket_connection_connect (G_SOCKET_CONNECTION (connection),
 850                                         address, cancellable, &last_error))
 851         {
 852           clarify_connect_error (last_error, connectable, address);
 853           g_object_unref (connection);
 854           connection = NULL;
 855         }
 856
 857       if (connection &&
 858           G_IS_PROXY_ADDRESS (address) &&
 859           client->priv->enable_proxy)
 860         {
 861           GProxyAddress *proxy_addr = G_PROXY_ADDRESS (address);
 862           const gchar *protocol;
 863           GProxy *proxy;
 864
 865           protocol = g_proxy_address_get_protocol (proxy_addr);
 866           proxy = g_proxy_get_default_for_protocol (protocol);
 867
 868           /* The connection should not be anything else then TCP Connection,
 869            * but let's put a safety guard in case
 870            */
 871           if (!G_IS_TCP_CONNECTION (connection))
 872             {
 873               g_critical ("Trying to proxy over non-TCP connection, this is "
 874                           "most likely a bug in GLib IO library.");
 875
 876               g_set_error_literal (&last_error,
 877                   G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
 878                   _("Trying to proxy over non-TCP connection is not supported."));
 879
 880               g_object_unref (connection);
 881               connection = NULL;
 882             }
 883           else if (proxy)
 884             {
 885               GIOStream *proxy_connection;
 886
 887               proxy_connection = g_proxy_connect (proxy,
 888                                                   connection,
 889                                                   proxy_addr,
 890                                                   cancellable,
 891                                                   &last_error);
 892               g_object_unref (connection);
 893               connection = proxy_connection;
 894               g_object_unref (proxy);
 895             }
 896           else if (!g_hash_table_lookup_extended (client->priv->app_proxies,
 897                                                   protocol, NULL, NULL))
 898             {
 899               g_set_error (&last_error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
 900                            _("Proxy protocol '%s' is not supported."),
 901                            protocol);
 902               g_object_unref (connection);
 903               connection = NULL;
 904             }
 905           else
 906             {
 907               application_proxy = TRUE;
 908             }
 909         }
 910
 911       if (!application_proxy && connection && client->priv->tls)
 912         {
 913           GIOStream *tlsconn;
 914
 915           tlsconn = g_tls_client_connection_new (connection, connectable, &last_error);
 916           g_object_unref (connection);
 917           connection = tlsconn;
 918
 919           if (tlsconn)
 920             {
 921               g_tls_client_connection_set_validation_flags (G_TLS_CLIENT_CONNECTION (tlsconn),
 922                                                             client->priv->tls_validation_flags);
 923               if (!g_tls_connection_handshake (G_TLS_CONNECTION (tlsconn),
 924                                                cancellable, &last_error))
 925                 {
 926                   g_object_unref (tlsconn);
 927                   connection = NULL;
 928                 }
 929             }
 930         }
 931
 932       if (connection && !G_IS_SOCKET_CONNECTION (connection))
 933         {
 934           GSocketConnection *wrapper_connection;
 935
 936           wrapper_connection = g_tcp_wrapper_connection_new (connection, socket);
 937           g_object_unref (connection);
 938           connection = (GIOStream *)wrapper_connection;
 939         }
 940
 941       g_object_unref (socket);
 942       g_object_unref (address);
 943     }
 944   g_object_unref (enumerator);
 945
 946   return G_SOCKET_CONNECTION (connection);
 947 }
 948
 949 /**
 950  * g_socket_client_connect_to_host:
 951  * @client: a #GSocketClient
 952  * @host_and_port: the name and optionally port of the host to connect to
 953  * @default_port: the default port to connect to
 954  * @cancellable: (allow-none): a #GCancellable, or %NULL
 955  * @error: a pointer to a #GError, or %NULL
 956  *
 957  * This is a helper function for g_socket_client_connect().
 958  *
 959  * Attempts to create a TCP connection to the named host.
 960  *
 961  * @host_and_port may be in any of a number of recognized formats; an IPv6
 962  * address, an IPv4 address, or a domain name (in which case a DNS
 963  * lookup is performed).  Quoting with [] is supported for all address
 964  * types.  A port override may be specified in the usual way with a
 965  * colon.  Ports may be given as decimal numbers or symbolic names (in
 966  * which case an /etc/services lookup is performed).
 967  *
 968  * If no port override is given in @host_and_port then @default_port will be
 969  * used as the port number to connect to.
 970  *
 971  * In general, @host_and_port is expected to be provided by the user (allowing
 972  * them to give the hostname, and a port override if necessary) and
 973  * @default_port is expected to be provided by the application.
 974  *
 975  * In the case that an IP address is given, a single connection
 976  * attempt is made.  In the case that a name is given, multiple
 977  * connection attempts may be made, in turn and according to the
 978  * number of address records in DNS, until a connection succeeds.
 979  *
 980  * Upon a successful connection, a new #GSocketConnection is constructed
 981  * and returned.  The caller owns this new object and must drop their
 982  * reference to it when finished with it.
 983  *
 984  * In the event of any failure (DNS error, service not found, no hosts
 985  * connectable) %NULL is returned and @error (if non-%NULL) is set
 986  * accordingly.
 987  *
 988  * Returns: (transfer full): a #GSocketConnection on success, %NULL on error.
 989  *
 990  * Since: 2.22
 991  */
 992 GSocketConnection *
 993 g_socket_client_connect_to_host (GSocketClient  *client,
 994                                  const gchar    *host_and_port,
 995                                  guint16         default_port,
 996                                  GCancellable   *cancellable,
 997                                  GError        **error)
 998 {
 999   GSocketConnectable *connectable;
1000   GSocketConnection *connection;
1001
1002   connectable = g_network_address_parse (host_and_port, default_port, error);
1003   if (connectable == NULL)
1004     return NULL;
1005
1006   connection = g_socket_client_connect (client, connectable,
1007                                         cancellable, error);
1008   g_object_unref (connectable);
1009
1010   return connection;
1011 }
1012
1013 /**
1014  * g_socket_client_connect_to_service:
1015  * @client: a #GSocketConnection
1016  * @domain: a domain name
1017  * @service: the name of the service to connect to
1018  * @cancellable: (allow-none): a #GCancellable, or %NULL
1019  * @error: a pointer to a #GError, or %NULL
1020  *
1021  * Attempts to create a TCP connection to a service.
1022  *
1023  * This call looks up the SRV record for @service at @domain for the
1024  * "tcp" protocol.  It then attempts to connect, in turn, to each of
1025  * the hosts providing the service until either a connection succeeds
1026  * or there are no hosts remaining.
1027  *
1028  * Upon a successful connection, a new #GSocketConnection is constructed
1029  * and returned.  The caller owns this new object and must drop their
1030  * reference to it when finished with it.
1031  *
1032  * In the event of any failure (DNS error, service not found, no hosts
1033  * connectable) %NULL is returned and @error (if non-%NULL) is set
1034  * accordingly.
1035  *
1036  * Returns: (transfer full): a #GSocketConnection if successful, or %NULL on error
1037  */
1038 GSocketConnection *
1039 g_socket_client_connect_to_service (GSocketClient  *client,
1040                                     const gchar    *domain,
1041                                     const gchar    *service,
1042                                     GCancellable   *cancellable,
1043                                     GError        **error)
1044 {
1045   GSocketConnectable *connectable;
1046   GSocketConnection *connection;
1047
1048   connectable = g_network_service_new (service, "tcp", domain);
1049   connection = g_socket_client_connect (client, connectable,
1050                                         cancellable, error);
1051   g_object_unref (connectable);
1052
1053   return connection;
1054 }
1055
1056 /**
1057  * g_socket_client_connect_to_uri:
1058  * @client: a #GSocketClient
1059  * @uri: A network URI
1060  * @default_port: the default port to connect to
1061  * @cancellable: (allow-none): a #GCancellable, or %NULL
1062  * @error: a pointer to a #GError, or %NULL
1063  *
1064  * This is a helper function for g_socket_client_connect().
1065  *
1066  * Attempts to create a TCP connection with a network URI.
1067  *
1068  * @uri may be any valid URI containing an "authority" (hostname/port)
1069  * component. If a port is not specified in the URI, @default_port
1070  * will be used. TLS will be negotiated if #GSocketClient:tls is %TRUE.
1071  * (#GSocketClient does not know to automatically assume TLS for
1072  * certain URI schemes.)
1073  *
1074  * Using this rather than g_socket_client_connect() or
1075  * g_socket_client_connect_to_host() allows #GSocketClient to
1076  * determine when to use application-specific proxy protocols.
1077  *
1078  * Upon a successful connection, a new #GSocketConnection is constructed
1079  * and returned.  The caller owns this new object and must drop their
1080  * reference to it when finished with it.
1081  *
1082  * In the event of any failure (DNS error, service not found, no hosts
1083  * connectable) %NULL is returned and @error (if non-%NULL) is set
1084  * accordingly.
1085  *
1086  * Returns: (transfer full): a #GSocketConnection on success, %NULL on error.
1087  *
1088  * Since: 2.26
1089  */
1090 GSocketConnection *
1091 g_socket_client_connect_to_uri (GSocketClient  *client,
1092                                 const gchar    *uri,
1093                                 guint16         default_port,
1094                                 GCancellable   *cancellable,
1095                                 GError        **error)
1096 {
1097   GSocketConnectable *connectable;
1098   GSocketConnection *connection;
1099
1100   connectable = g_network_address_parse_uri (uri, default_port, error);
1101   if (connectable == NULL)
1102     return NULL;
1103
1104   connection = g_socket_client_connect (client, connectable,
1105                                         cancellable, error);
1106   g_object_unref (connectable);
1107
1108   return connection;
1109 }
1110
1111 typedef struct
1112 {
1113   GSimpleAsyncResult *result;
1114   GCancellable *cancellable;
1115   GSocketClient *client;
1116
1117   GSocketConnectable *connectable;
1118   GSocketAddressEnumerator *enumerator;
1119   GProxyAddress *proxy_addr;
1120   GSocketAddress *current_addr;
1121   GSocket *current_socket;
1122   GIOStream *connection;
1123
1124   GError *last_error;
1125 } GSocketClientAsyncConnectData;
1126
1127 static void
1128 g_socket_client_async_connect_complete (GSocketClientAsyncConnectData *data)
1129 {
1130   if (data->last_error)
1131     {
1132       g_simple_async_result_take_error (data->result, data->last_error);
1133     }
1134   else
1135     {
1136       g_assert (data->connection);
1137
1138       if (!G_IS_SOCKET_CONNECTION (data->connection))
1139         {
1140           GSocketConnection *wrapper_connection;
1141
1142           wrapper_connection = g_tcp_wrapper_connection_new (data->connection,
1143                                                              data->current_socket);
1144           g_object_unref (data->connection);
1145           data->connection = (GIOStream *)wrapper_connection;
1146         }
1147
1148       g_simple_async_result_set_op_res_gpointer (data->result,
1149                                                  data->connection,
1150                                                  g_object_unref);
1151     }
1152
1153   g_simple_async_result_complete (data->result);
1154   g_object_unref (data->result);
1155   g_object_unref (data->connectable);
1156   g_object_unref (data->enumerator);
1157   if (data->cancellable)
1158     g_object_unref (data->cancellable);
1159   if (data->current_addr)
1160     g_object_unref (data->current_addr);
1161   if (data->current_socket)
1162     g_object_unref (data->current_socket);
1163   if (data->proxy_addr)
1164     g_object_unref (data->proxy_addr);
1165   g_slice_free (GSocketClientAsyncConnectData, data);
1166 }
1167
1168
1169 static void
1170 g_socket_client_enumerator_callback (GObject      *object,
1171                                      GAsyncResult *result,
1172                                      gpointer      user_data);
1173
1174 static void
1175 set_last_error (GSocketClientAsyncConnectData *data,
1176                 GError *error)
1177 {
1178   g_clear_error (&data->last_error);
1179   data->last_error = error;
1180 }
1181
1182 static void
1183 enumerator_next_async (GSocketClientAsyncConnectData *data)
1184 {
1185   /* We need to cleanup the state */
1186   g_clear_object (&data->current_socket);
1187   g_clear_object (&data->current_addr);
1188   g_clear_object (&data->proxy_addr);
1189   g_clear_object (&data->connection);
1190
1191   g_socket_address_enumerator_next_async (data->enumerator,
1192                                           data->cancellable,
1193                                           g_socket_client_enumerator_callback,
1194                                           data);
1195 }
1196
1197 static void
1198 g_socket_client_tls_handshake_callback (GObject      *object,
1199                                         GAsyncResult *result,
1200                                         gpointer      user_data)
1201 {
1202   GSocketClientAsyncConnectData *data = user_data;
1203
1204   if (g_tls_connection_handshake_finish (G_TLS_CONNECTION (object),
1205                                          result,
1206                                          &data->last_error))
1207     {
1208       g_object_unref (data->connection);
1209       data->connection = G_IO_STREAM (object);
1210
1211       g_socket_client_async_connect_complete (data);
1212     }
1213   else
1214     {
1215       g_object_unref (object);
1216       enumerator_next_async (data);
1217     }
1218 }
1219
1220 static void
1221 g_socket_client_tls_handshake (GSocketClientAsyncConnectData *data)
1222 {
1223   GIOStream *tlsconn;
1224
1225   if (!data->client->priv->tls)
1226     {
1227       g_socket_client_async_connect_complete (data);
1228       return;
1229     }
1230
1231   tlsconn = g_tls_client_connection_new (data->connection,
1232                                          data->connectable,
1233                                          &data->last_error);
1234   if (tlsconn)
1235     {
1236       g_tls_client_connection_set_validation_flags (G_TLS_CLIENT_CONNECTION (tlsconn),
1237                                                     data->client->priv->tls_validation_flags);
1238       g_tls_connection_handshake_async (G_TLS_CONNECTION (tlsconn),
1239                                         G_PRIORITY_DEFAULT,
1240                                         data->cancellable,
1241                                         g_socket_client_tls_handshake_callback,
1242                                         data);
1243     }
1244   else
1245     {
1246       enumerator_next_async (data);
1247     }
1248 }
1249
1250 static void
1251 g_socket_client_proxy_connect_callback (GObject      *object,
1252                                         GAsyncResult *result,
1253                                         gpointer      user_data)
1254 {
1255   GSocketClientAsyncConnectData *data = user_data;
1256
1257   g_object_unref (data->connection);
1258   data->connection = g_proxy_connect_finish (G_PROXY (object),
1259                                              result,
1260                                              &data->last_error);
1261   if (!data->connection)
1262     {
1263       enumerator_next_async (data);
1264       return;
1265     }
1266
1267   g_socket_client_tls_handshake (data);
1268 }
1269
1270 static void
1271 g_socket_client_connected_callback (GObject      *source,
1272                                     GAsyncResult *result,
1273                                     gpointer      user_data)
1274 {
1275   GSocketClientAsyncConnectData *data = user_data;
1276   GError *error = NULL;
1277   GProxy *proxy;
1278   const gchar *protocol;
1279
1280   if (!g_socket_connection_connect_finish (G_SOCKET_CONNECTION (source),
1281                                            result, &error))
1282     {
1283       clarify_connect_error (error, data->connectable,
1284                              data->current_addr);
1285       set_last_error (data, error);
1286
1287       /* try next one */
1288       enumerator_next_async (data);
1289       return;
1290     }
1291
1292   /* wrong, but backward compatible */
1293   g_socket_set_blocking (data->current_socket, TRUE);
1294
1295   if (!data->proxy_addr)
1296     {
1297       g_socket_client_tls_handshake (data);
1298       return;
1299     }
1300
1301   protocol  = g_proxy_address_get_protocol (data->proxy_addr);
1302   proxy = g_proxy_get_default_for_protocol (protocol);
1303
1304   /* The connection should not be anything other than TCP,
1305    * but let's put a safety guard in case
1306    */
1307   if (!G_IS_TCP_CONNECTION (data->connection))
1308     {
1309       g_critical ("Trying to proxy over non-TCP connection, this is "
1310           "most likely a bug in GLib IO library.");
1311
1312       g_set_error_literal (&data->last_error,
1313           G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
1314           _("Trying to proxy over non-TCP connection is not supported."));
1315
1316       enumerator_next_async (data);
1317     }
1318   else if (proxy)
1319     {
1320       g_proxy_connect_async (proxy,
1321                              data->connection,
1322                              data->proxy_addr,
1323                              data->cancellable,
1324                              g_socket_client_proxy_connect_callback,
1325                              data);
1326       g_object_unref (proxy);
1327     }
1328   else if (!g_hash_table_lookup_extended (data->client->priv->app_proxies,
1329                                           protocol, NULL, NULL))
1330     {
1331       g_clear_error (&data->last_error);
1332
1333       g_set_error (&data->last_error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
1334           _("Proxy protocol '%s' is not supported."),
1335           protocol);
1336
1337       enumerator_next_async (data);
1338     }
1339   else
1340     {
1341       /* Simply complete the connection, we don't want to do TLS handshake
1342        * as the application proxy handling may need proxy handshake first */
1343       g_socket_client_async_connect_complete (data);
1344     }
1345 }
1346
1347 static void
1348 g_socket_client_enumerator_callback (GObject      *object,
1349                                      GAsyncResult *result,
1350                                      gpointer      user_data)
1351 {
1352   GSocketClientAsyncConnectData *data = user_data;
1353   GSocketAddress *address = NULL;
1354   GSocket *socket;
1355   GError *tmp_error = NULL;
1356
1357   if (g_cancellable_is_cancelled (data->cancellable))
1358     {
1359       g_clear_error (&data->last_error);
1360       g_cancellable_set_error_if_cancelled (data->cancellable, &data->last_error);
1361       g_socket_client_async_connect_complete (data);
1362       return;
1363     }
1364
1365   address = g_socket_address_enumerator_next_finish (data->enumerator,
1366                                                      result, &tmp_error);
1367
1368   if (address == NULL)
1369     {
1370       if (tmp_error)
1371         set_last_error (data, tmp_error);
1372       else if (data->last_error == NULL)
1373         g_set_error_literal (&data->last_error, G_IO_ERROR, G_IO_ERROR_FAILED,
1374                              _("Unknown error on connect"));
1375
1376       g_socket_client_async_connect_complete (data);
1377       return;
1378     }
1379
1380   if (G_IS_PROXY_ADDRESS (address) &&
1381       data->client->priv->enable_proxy)
1382     data->proxy_addr = g_object_ref (G_PROXY_ADDRESS (address));
1383
1384   g_clear_error (&data->last_error);
1385
1386   socket = create_socket (data->client, address, &data->last_error);
1387   if (socket == NULL)
1388     {
1389       g_object_unref (address);
1390       enumerator_next_async (data);
1391       return;
1392     }
1393
1394   data->current_socket = socket;
1395   data->current_addr = address;
1396   data->connection = (GIOStream *) g_socket_connection_factory_create_connection (socket);
1397
1398   g_socket_connection_connect_async (G_SOCKET_CONNECTION (data->connection),
1399                                      address, data->cancellable,
1400                                      g_socket_client_connected_callback, data);
1401 }
1402
1403 /**
1404  * g_socket_client_connect_async:
1405  * @client: a #GSocketClient
1406  * @connectable: a #GSocketConnectable specifying the remote address.
1407  * @cancellable: (allow-none): a #GCancellable, or %NULL
1408  * @callback: (scope async): a #GAsyncReadyCallback
1409  * @user_data: (closure): user data for the callback
1410  *
1411  * This is the asynchronous version of g_socket_client_connect().
1412  *
1413  * When the operation is finished @callback will be
1414  * called. You can then call g_socket_client_connect_finish() to get
1415  * the result of the operation.
1416  *
1417  * Since: 2.22
1418  */
1419 void
1420 g_socket_client_connect_async (GSocketClient       *client,
1421                                GSocketConnectable  *connectable,
1422                                GCancellable        *cancellable,
1423                                GAsyncReadyCallback  callback,
1424                                gpointer             user_data)
1425 {
1426   GSocketClientAsyncConnectData *data;
1427
1428   g_return_if_fail (G_IS_SOCKET_CLIENT (client));
1429
1430   data = g_slice_new0 (GSocketClientAsyncConnectData);
1431
1432   data->result = g_simple_async_result_new (G_OBJECT (client),
1433                                             callback, user_data,
1434                                             g_socket_client_connect_async);
1435   data->client = client;
1436   if (cancellable)
1437     data->cancellable = g_object_ref (cancellable);
1438   else
1439     data->cancellable = NULL;
1440   data->last_error = NULL;
1441   data->connectable = g_object_ref (connectable);
1442
1443   if (can_use_proxy (client))
1444       data->enumerator = g_socket_connectable_proxy_enumerate (connectable);
1445   else
1446       data->enumerator = g_socket_connectable_enumerate (connectable);
1447
1448   enumerator_next_async (data);
1449 }
1450
1451 /**
1452  * g_socket_client_connect_to_host_async:
1453  * @client: a #GSocketClient
1454  * @host_and_port: the name and optionally the port of the host to connect to
1455  * @default_port: the default port to connect to
1456  * @cancellable: (allow-none): a #GCancellable, or %NULL
1457  * @callback: (scope async): a #GAsyncReadyCallback
1458  * @user_data: (closure): user data for the callback
1459  *
1460  * This is the asynchronous version of g_socket_client_connect_to_host().
1461  *
1462  * When the operation is finished @callback will be
1463  * called. You can then call g_socket_client_connect_to_host_finish() to get
1464  * the result of the operation.
1465  *
1466  * Since: 2.22
1467  */
1468 void
1469 g_socket_client_connect_to_host_async (GSocketClient        *client,
1470                                        const gchar          *host_and_port,
1471                                        guint16               default_port,
1472                                        GCancellable         *cancellable,
1473                                        GAsyncReadyCallback   callback,
1474                                        gpointer              user_data)
1475 {
1476   GSocketConnectable *connectable;
1477   GError *error;
1478
1479   error = NULL;
1480   connectable = g_network_address_parse (host_and_port, default_port,
1481                                          &error);
1482   if (connectable == NULL)
1483     {
1484       g_simple_async_report_take_gerror_in_idle (G_OBJECT (client),
1485                                             callback, user_data, error);
1486     }
1487   else
1488     {
1489       g_socket_client_connect_async (client,
1490                                      connectable, cancellable,
1491                                      callback, user_data);
1492       g_object_unref (connectable);
1493     }
1494 }
1495
1496 /**
1497  * g_socket_client_connect_to_service_async:
1498  * @client: a #GSocketClient
1499  * @domain: a domain name
1500  * @service: the name of the service to connect to
1501  * @cancellable: (allow-none): a #GCancellable, or %NULL
1502  * @callback: (scope async): a #GAsyncReadyCallback
1503  * @user_data: (closure): user data for the callback
1504  *
1505  * This is the asynchronous version of
1506  * g_socket_client_connect_to_service().
1507  *
1508  * Since: 2.22
1509  */
1510 void
1511 g_socket_client_connect_to_service_async (GSocketClient       *client,
1512                                           const gchar         *domain,
1513                                           const gchar         *service,
1514                                           GCancellable        *cancellable,
1515                                           GAsyncReadyCallback  callback,
1516                                           gpointer             user_data)
1517 {
1518   GSocketConnectable *connectable;
1519
1520   connectable = g_network_service_new (service, "tcp", domain);
1521   g_socket_client_connect_async (client,
1522                                  connectable, cancellable,
1523                                  callback, user_data);
1524   g_object_unref (connectable);
1525 }
1526
1527 /**
1528  * g_socket_client_connect_to_uri_async:
1529  * @client: a #GSocketClient
1530  * @uri: a network uri
1531  * @default_port: the default port to connect to
1532  * @cancellable: (allow-none): a #GCancellable, or %NULL
1533  * @callback: (scope async): a #GAsyncReadyCallback
1534  * @user_data: (closure): user data for the callback
1535  *
1536  * This is the asynchronous version of g_socket_client_connect_to_uri().
1537  *
1538  * When the operation is finished @callback will be
1539  * called. You can then call g_socket_client_connect_to_uri_finish() to get
1540  * the result of the operation.
1541  *
1542  * Since: 2.26
1543  */
1544 void
1545 g_socket_client_connect_to_uri_async (GSocketClient        *client,
1546                                       const gchar          *uri,
1547                                       guint16               default_port,
1548                                       GCancellable         *cancellable,
1549                                       GAsyncReadyCallback   callback,
1550                                       gpointer              user_data)
1551 {
1552   GSocketConnectable *connectable;
1553   GError *error;
1554
1555   error = NULL;
1556   connectable = g_network_address_parse_uri (uri, default_port, &error);
1557   if (connectable == NULL)
1558     {
1559       g_simple_async_report_take_gerror_in_idle (G_OBJECT (client),
1560                                             callback, user_data, error);
1561     }
1562   else
1563     {
1564       g_socket_client_connect_async (client,
1565                                      connectable, cancellable,
1566                                      callback, user_data);
1567       g_object_unref (connectable);
1568     }
1569 }
1570
1571
1572 /**
1573  * g_socket_client_connect_finish:
1574  * @client: a #GSocketClient.
1575  * @result: a #GAsyncResult.
1576  * @error: a #GError location to store the error occurring, or %NULL to
1577  * ignore.
1578  *
1579  * Finishes an async connect operation. See g_socket_client_connect_async()
1580  *
1581  * Returns: (transfer full): a #GSocketConnection on success, %NULL on error.
1582  *
1583  * Since: 2.22
1584  */
1585 GSocketConnection *
1586 g_socket_client_connect_finish (GSocketClient  *client,
1587                                 GAsyncResult   *result,
1588                                 GError        **error)
1589 {
1590   GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result);
1591
1592   if (g_simple_async_result_propagate_error (simple, error))
1593     return NULL;
1594
1595   return g_object_ref (g_simple_async_result_get_op_res_gpointer (simple));
1596 }
1597
1598 /**
1599  * g_socket_client_connect_to_host_finish:
1600  * @client: a #GSocketClient.
1601  * @result: a #GAsyncResult.
1602  * @error: a #GError location to store the error occurring, or %NULL to
1603  * ignore.
1604  *
1605  * Finishes an async connect operation. See g_socket_client_connect_to_host_async()
1606  *
1607  * Returns: (transfer full): a #GSocketConnection on success, %NULL on error.
1608  *
1609  * Since: 2.22
1610  */
1611 GSocketConnection *
1612 g_socket_client_connect_to_host_finish (GSocketClient  *client,
1613                                         GAsyncResult   *result,
1614                                         GError        **error)
1615 {
1616   return g_socket_client_connect_finish (client, result, error);
1617 }
1618
1619 /**
1620  * g_socket_client_connect_to_service_finish:
1621  * @client: a #GSocketClient.
1622  * @result: a #GAsyncResult.
1623  * @error: a #GError location to store the error occurring, or %NULL to
1624  * ignore.
1625  *
1626  * Finishes an async connect operation. See g_socket_client_connect_to_service_async()
1627  *
1628  * Returns: (transfer full): a #GSocketConnection on success, %NULL on error.
1629  *
1630  * Since: 2.22
1631  */
1632 GSocketConnection *
1633 g_socket_client_connect_to_service_finish (GSocketClient  *client,
1634                                            GAsyncResult   *result,
1635                                            GError        **error)
1636 {
1637   return g_socket_client_connect_finish (client, result, error);
1638 }
1639
1640 /**
1641  * g_socket_client_connect_to_uri_finish:
1642  * @client: a #GSocketClient.
1643  * @result: a #GAsyncResult.
1644  * @error: a #GError location to store the error occurring, or %NULL to
1645  * ignore.
1646  *
1647  * Finishes an async connect operation. See g_socket_client_connect_to_uri_async()
1648  *
1649  * Returns: (transfer full): a #GSocketConnection on success, %NULL on error.
1650  *
1651  * Since: 2.26
1652  */
1653 GSocketConnection *
1654 g_socket_client_connect_to_uri_finish (GSocketClient  *client,
1655                                        GAsyncResult   *result,
1656                                        GError        **error)
1657 {
1658   return g_socket_client_connect_finish (client, result, error);
1659 }
1660
1661 /**
1662  * g_socket_client_add_application_proxy:
1663  * @client: a #GSocketClient
1664  * @protocol: The proxy protocol
1665  *
1666  * Enable proxy protocols to be handled by the application. When the
1667  * indicated proxy protocol is returned by the #GProxyResolver,
1668  * #GSocketClient will consider this protocol as supported but will
1669  * not try to find a #GProxy instance to handle handshaking. The
1670  * application must check for this case by calling
1671  * g_socket_connection_get_remote_address() on the returned
1672  * #GSocketConnection, and seeing if it's a #GProxyAddress of the
1673  * appropriate type, to determine whether or not it needs to handle
1674  * the proxy handshaking itself.
1675  *
1676  * This should be used for proxy protocols that are dialects of
1677  * another protocol such as HTTP proxy. It also allows cohabitation of
1678  * proxy protocols that are reused between protocols. A good example
1679  * is HTTP. It can be used to proxy HTTP, FTP and Gopher and can also
1680  * be use as generic socket proxy through the HTTP CONNECT method.
1681  *
1682  * When the proxy is detected as being an application proxy, TLS handshake
1683  * will be skipped. This is required to let the application do the proxy
1684  * specific handshake.
1685  */
1686 void
1687 g_socket_client_add_application_proxy (GSocketClient *client,
1688                                        const gchar   *protocol)
1689 {
1690   g_hash_table_insert (client->priv->app_proxies, g_strdup (protocol), NULL);
1691 }