agent/agent.h

   1 /*
   2  * This file is part of the Nice GLib ICE library.
   3  *
   4  * (C) 2006-2010 Collabora Ltd.
   5  *  Contact: Youness Alaoui
   6  * (C) 2006-2010 Nokia Corporation. All rights reserved.
   7  *  Contact: Kai Vehmanen
   8  *
   9  * The contents of this file are subject to the Mozilla Public License Version
  10  * 1.1 (the "License"); you may not use this file except in compliance with
  11  * the License. You may obtain a copy of the License at
  12  * http://www.mozilla.org/MPL/
  13  *
  14  * Software distributed under the License is distributed on an "AS IS" basis,
  15  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  16  * for the specific language governing rights and limitations under the
  17  * License.
  18  *
  19  * The Original Code is the Nice GLib ICE library.
  20  *
  21  * The Initial Developers of the Original Code are Collabora Ltd and Nokia
  22  * Corporation. All Rights Reserved.
  23  *
  24  * Contributors:
  25  *   Dafydd Harries, Collabora Ltd.
  26  *   Youness Alaoui, Collabora Ltd.
  27  *   Kai Vehmanen, Nokia
  28  *
  29  * Alternatively, the contents of this file may be used under the terms of the
  30  * the GNU Lesser General Public License Version 2.1 (the "LGPL"), in which
  31  * case the provisions of LGPL are applicable instead of those above. If you
  32  * wish to allow use of your version of this file only under the terms of the
  33  * LGPL and not to allow others to use your version of this file under the
  34  * MPL, indicate your decision by deleting the provisions above and replace
  35  * them with the notice and other provisions required by the LGPL. If you do
  36  * not delete the provisions above, a recipient may use your version of this
  37  * file under either the MPL or the LGPL.
  38  */
  39
  40 #ifndef _AGENT_H
  41 #define _AGENT_H
  42
  43 /**
  44  * SECTION:agent
  45  * @short_description:  ICE agent API implementation
  46  * @see_also: #NiceCandidate
  47  * @see_also: #NiceAddress
  48  * @include: agent.h
  49  * @stability: Stable
  50  *
  51  * The #NiceAgent is your main object when using libnice.
  52  * It is the agent that will take care of everything relating to ICE.
  53  * It will take care of discovering your local candidates and do
  54  *  connectivity checks to create a stream of data between you and your peer.
  55  *
  56  <example>
  57    <title>Simple example on how to use libnice</title>
  58    <programlisting>
  59    guint stream_id;
  60    gchar buffer[] = "hello world!";
  61    GSList *lcands = NULL;
  62
  63    // Create a nice agent
  64    NiceAgent *agent = nice_agent_new (NULL, NICE_COMPATIBILITY_RFC5245);
  65
  66    // Connect the signals
  67    g_signal_connect (G_OBJECT (agent), "candidate-gathering-done",
  68                      G_CALLBACK (cb_candidate_gathering_done), NULL);
  69    g_signal_connect (G_OBJECT (agent), "component-state-changed",
  70                      G_CALLBACK (cb_component_state_changed), NULL);
  71    g_signal_connect (G_OBJECT (agent), "new-selected-pair",
  72                      G_CALLBACK (cb_new_selected_pair), NULL);
  73
  74    // Create a new stream with one component and start gathering candidates
  75    stream_id = nice_agent_add_stream (agent, 1);
  76    nice_agent_gather_candidates (agent, stream_id);
  77
  78    // Attach to the component to receive the data
  79    nice_agent_attach_recv (agent, stream_id, 1, NULL,
  80                           cb_nice_recv, NULL);
  81
  82    // ... Wait until the signal candidate-gathering-done is fired ...
  83    lcands = nice_agent_get_local_candidates(agent, stream_id, 1);
  84
  85    // ... Send local candidates to the peer and set the peer's remote candidates
  86    nice_agent_set_remote_candidates (agent, stream_id, 1, rcands);
  87
  88    // ... Wait until the signal new-selected-pair is fired ...
  89    // Send our message!
  90    nice_agent_send (agent, stream_id, 1, sizeof(buffer), buffer);
  91
  92    // Anything received will be received through the cb_nice_recv callback
  93
  94    // Destroy the object
  95    g_object_unref(agent);
  96
  97    </programlisting>
  98  </example>
  99  */
 100
 101
 102 #include <glib-object.h>
 103
 104 /**
 105  * NiceAgent:
 106  *
 107  * The #NiceAgent is the main GObject of the libnice library and represents
 108  * the ICE agent.
 109  */
 110 typedef struct _NiceAgent NiceAgent;
 111
 112 #include "address.h"
 113 #include "candidate.h"
 114 #include "debug.h"
 115
 116
 117 G_BEGIN_DECLS
 118
 119 #define NICE_TYPE_AGENT nice_agent_get_type()
 120
 121 #define NICE_AGENT(obj) \
 122   (G_TYPE_CHECK_INSTANCE_CAST ((obj), \
 123   NICE_TYPE_AGENT, NiceAgent))
 124
 125 #define NICE_AGENT_CLASS(klass) \
 126   (G_TYPE_CHECK_CLASS_CAST ((klass), \
 127   NICE_TYPE_AGENT, NiceAgentClass))
 128
 129 #define NICE_IS_AGENT(obj) \
 130   (G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
 131   NICE_TYPE_AGENT))
 132
 133 #define NICE_IS_AGENT_CLASS(klass) \
 134   (G_TYPE_CHECK_CLASS_TYPE ((klass), \
 135   NICE_TYPE_AGENT))
 136
 137 #define NICE_AGENT_GET_CLASS(obj) \
 138   (G_TYPE_INSTANCE_GET_CLASS ((obj), \
 139   NICE_TYPE_AGENT, NiceAgentClass))
 140
 141 typedef struct _NiceAgentClass NiceAgentClass;
 142
 143 struct _NiceAgentClass
 144 {
 145   GObjectClass parent_class;
 146 };
 147
 148
 149 GType nice_agent_get_type (void);
 150
 151
 152 /**
 153  * NICE_AGENT_MAX_REMOTE_CANDIDATES:
 154  *
 155  * A hard limit for the number of remote candidates. This
 156  * limit is enforced to protect against malevolent remote
 157  * clients.
 158  */
 159 #define NICE_AGENT_MAX_REMOTE_CANDIDATES    25
 160
 161 /**
 162  * NiceComponentState:
 163  * @NICE_COMPONENT_STATE_DISCONNECTED: No activity scheduled
 164  * @NICE_COMPONENT_STATE_GATHERING: Gathering local candidates
 165  * @NICE_COMPONENT_STATE_CONNECTING: Establishing connectivity
 166  * @NICE_COMPONENT_STATE_CONNECTED: At least one working candidate pair
 167  * @NICE_COMPONENT_STATE_READY: ICE concluded, candidate pair selection
 168  * is now final
 169  * @NICE_COMPONENT_STATE_FAILED: Connectivity checks have been completed,
 170  * but connectivity was not established
 171  * @NICE_COMPONENT_STATE_LAST: Dummy state
 172  *
 173  * An enum representing the state of a component.
 174  * <para> See also: #NiceAgent::component-state-changed </para>
 175  */
 176 typedef enum
 177 {
 178   NICE_COMPONENT_STATE_DISCONNECTED,
 179   NICE_COMPONENT_STATE_GATHERING,
 180   NICE_COMPONENT_STATE_CONNECTING,
 181   NICE_COMPONENT_STATE_CONNECTED,
 182   NICE_COMPONENT_STATE_READY,
 183   NICE_COMPONENT_STATE_FAILED,
 184   NICE_COMPONENT_STATE_LAST
 185 } NiceComponentState;
 186
 187
 188 /**
 189  * NiceComponentType:
 190  * @NICE_COMPONENT_TYPE_RTP: RTP Component type
 191  * @NICE_COMPONENT_TYPE_RTCP: RTCP Component type
 192  *
 193  * Convenience enum representing the type of a component for use as the
 194  * component_id for RTP/RTCP usages.
 195  <example>
 196    <title>Example of use.</title>
 197    <programlisting>
 198    nice_agent_send (agent, stream_id, NICE_COMPONENT_TYPE_RTP, len, buf);
 199    </programlisting>
 200   </example>
 201  */
 202 typedef enum
 203 {
 204   NICE_COMPONENT_TYPE_RTP = 1,
 205   NICE_COMPONENT_TYPE_RTCP = 2
 206 } NiceComponentType;
 207
 208
 209 /**
 210  * NiceCompatibility:
 211  * @NICE_COMPATIBILITY_RFC5245: Use compatibility with the RFC5245 ICE specs
 212  * @NICE_COMPATIBILITY_GOOGLE: Use compatibility for Google Talk specs
 213  * @NICE_COMPATIBILITY_MSN: Use compatibility for MSN Messenger specs
 214  * @NICE_COMPATIBILITY_WLM2009: Use compatibility with Windows Live Messenger
 215  * 2009
 216  * @NICE_COMPATIBILITY_OC2007: Use compatibility with Microsoft Office Communicator 2007
 217  * @NICE_COMPATIBILITY_OC2007R2: Use compatibility with Microsoft Office Communicator 2007 R2
 218  * @NICE_COMPATIBILITY_DRAFT19: Use compatibility for ICE Draft 19 specs
 219  * @NICE_COMPATIBILITY_LAST: Dummy last compatibility mode
 220  *
 221  * An enum to specify which compatible specifications the #NiceAgent should use.
 222  * Use with nice_agent_new()
 223  *
 224  * <warning>@NICE_COMPATIBILITY_DRAFT19 is deprecated and should not be used
 225  * in newly-written code. It is kept for compatibility reasons and
 226  * represents the same compatibility as @NICE_COMPATIBILITY_RFC5245 </warning>
 227  */
 228 typedef enum
 229 {
 230   NICE_COMPATIBILITY_RFC5245 = 0,
 231   NICE_COMPATIBILITY_GOOGLE,
 232   NICE_COMPATIBILITY_MSN,
 233   NICE_COMPATIBILITY_WLM2009,
 234   NICE_COMPATIBILITY_OC2007,
 235   NICE_COMPATIBILITY_OC2007R2,
 236   NICE_COMPATIBILITY_DRAFT19 = NICE_COMPATIBILITY_RFC5245,
 237   NICE_COMPATIBILITY_LAST = NICE_COMPATIBILITY_OC2007R2,
 238 } NiceCompatibility;
 239
 240 /**
 241  * NiceProxyType:
 242  * @NICE_PROXY_TYPE_NONE: Do not use a proxy
 243  * @NICE_PROXY_TYPE_SOCKS5: Use a SOCKS5 proxy
 244  * @NICE_PROXY_TYPE_HTTP: Use an HTTP proxy
 245  * @NICE_PROXY_TYPE_LAST: Dummy last proxy type
 246  *
 247  * An enum to specify which proxy type to use for relaying.
 248  * Note that the proxies will only be used with TCP TURN relaying.
 249  * <para> See also: #NiceAgent:proxy-type </para>
 250  *
 251  * Since: 0.0.4
 252  */
 253 typedef enum
 254 {
 255   NICE_PROXY_TYPE_NONE = 0,
 256   NICE_PROXY_TYPE_SOCKS5,
 257   NICE_PROXY_TYPE_HTTP,
 258   NICE_PROXY_TYPE_LAST = NICE_PROXY_TYPE_HTTP,
 259 } NiceProxyType;
 260
 261
 262 /**
 263  * NiceAgentRecvFunc:
 264  * @agent: The #NiceAgent Object
 265  * @stream_id: The id of the stream
 266  * @component_id: The id of the component of the stream
 267  *        which received the data
 268  * @len: The length of the data
 269  * @buf: The buffer containing the data received
 270  * @user_data: The user data set in nice_agent_attach_recv()
 271  *
 272  * Callback function when data is received on a component
 273  *
 274  */
 275 typedef void (*NiceAgentRecvFunc) (
 276   NiceAgent *agent, guint stream_id, guint component_id, guint len,
 277   gchar *buf, gpointer user_data);
 278
 279
 280 /**
 281  * nice_agent_new:
 282  * @ctx: The Glib Mainloop Context to use for timers
 283  * @compat: The compatibility mode of the agent
 284  *
 285  * Create a new #NiceAgent.
 286  * The returned object must be freed with g_object_unref()
 287  *
 288  * Returns: The new agent GObject
 289  */
 290 NiceAgent *
 291 nice_agent_new (GMainContext *ctx, NiceCompatibility compat);
 292
 293
 294 /**
 295  * nice_agent_new_reliable:
 296  * @ctx: The Glib Mainloop Context to use for timers
 297  * @compat: The compatibility mode of the agent
 298  *
 299  * Create a new #NiceAgent in reliable mode, which uses #PseudoTcpSocket to
 300  * assure reliability of the messages.
 301  * The returned object must be freed with g_object_unref()
 302  * <para> See also: #NiceAgent::reliable-transport-writable </para>
 303  *
 304  * Since: 0.0.11
 305  *
 306  * Returns: The new agent GObject
 307  */
 308 NiceAgent *
 309 nice_agent_new_reliable (GMainContext *ctx, NiceCompatibility compat);
 310
 311 /**
 312  * nice_agent_add_local_address:
 313  * @agent: The #NiceAgent Object
 314  * @addr: The address to listen to
 315  * If the port is 0, then a random port will be chosen by the system
 316  *
 317  * Add a local address from which to derive local host candidates for
 318  * candidate gathering.
 319  * <para>
 320  * Since 0.0.5, if this method is not called, libnice will automatically
 321  * discover the local addresses available
 322  * </para>
 323  *
 324  * See also: nice_agent_gather_candidates()
 325  * Returns: %TRUE on success, %FALSE on fatal (memory allocation) errors
 326  */
 327 gboolean
 328 nice_agent_add_local_address (NiceAgent *agent, NiceAddress *addr);
 329
 330
 331 /**
 332  * nice_agent_add_stream:
 333  * @agent: The #NiceAgent Object
 334  * @n_components: The number of components to add to the stream
 335  *
 336  * Adds a data stream to @agent containing @n_components components.
 337  *
 338  * Returns: The ID of the new stream, 0 on failure
 339  **/
 340 guint
 341 nice_agent_add_stream (
 342   NiceAgent *agent,
 343   guint n_components);
 344
 345 /**
 346  * nice_agent_remove_stream:
 347  * @agent: The #NiceAgent Object
 348  * @stream_id: The ID of the stream to remove
 349  *
 350  * Remove and free a previously created data stream from @agent
 351  *
 352  **/
 353 void
 354 nice_agent_remove_stream (
 355   NiceAgent *agent,
 356   guint stream_id);
 357
 358
 359 /**
 360  * nice_agent_set_port_range:
 361  * @agent: The #NiceAgent Object
 362  * @stream_id: The ID of the stream
 363  * @component_id: The ID of the component
 364  * @min_port: The minimum port to use
 365  * @max_port: The maximum port to use
 366  *
 367  * Sets a preferred port range for allocating host candidates.
 368  * <para>
 369  * If a local host candidate cannot be created on that port
 370  * range, then the nice_agent_gather_candidates() call will fail.
 371  * </para>
 372  * <para>
 373  * This MUST be called before nice_agent_gather_candidates()
 374  * </para>
 375  *
 376  */
 377 void
 378 nice_agent_set_port_range (
 379     NiceAgent *agent,
 380     guint stream_id,
 381     guint component_id,
 382     guint min_port,
 383     guint max_port);
 384
 385 /**
 386  * nice_agent_set_relay_info:
 387  * @agent: The #NiceAgent Object
 388  * @stream_id: The ID of the stream
 389  * @component_id: The ID of the component
 390  * @server_ip: The IP address of the TURN server
 391  * @server_port: The port of the TURN server
 392  * @username: The TURN username to use for the allocate
 393  * @password: The TURN password to use for the allocate
 394  * @type: The type of relay to use
 395  *
 396  * Sets the settings for using a relay server during the candidate discovery.
 397  *
 398  * Returns: %TRUE if the TURN settings were accepted.
 399  * %FALSE if the address was invalid.
 400  */
 401 gboolean nice_agent_set_relay_info(
 402     NiceAgent *agent,
 403     guint stream_id,
 404     guint component_id,
 405     const gchar *server_ip,
 406     guint server_port,
 407     const gchar *username,
 408     const gchar *password,
 409     NiceRelayType type);
 410
 411 /**
 412  * nice_agent_gather_candidates:
 413  * @agent: The #NiceAgent Object
 414  * @stream_id: The id of the stream to start
 415  *
 416  * Start the candidate gathering process.
 417  * Once done, #NiceAgent::candidate-gathering-done is called for the stream
 418  *
 419  * <para>See also: nice_agent_add_local_address()</para>
 420  * <para>See also: nice_agent_set_port_range()</para>
 421  *
 422  * Returns: %FALSE if the stream id is invalid or if a host candidate couldn't be allocated
 423  * on the requested interfaces/ports.
 424  *
 425  <note>
 426    <para>
 427     Local addresses can be previously set with nice_agent_add_local_address()
 428   </para>
 429   <para>
 430     Since 0.0.5, If no local address was previously added, then the nice agent
 431     will automatically detect the local address using
 432     nice_interfaces_get_local_ips()
 433    </para>
 434  </note>
 435  */
 436 gboolean
 437 nice_agent_gather_candidates (
 438   NiceAgent *agent,
 439   guint stream_id);
 440
 441 /**
 442  * nice_agent_set_remote_credentials:
 443  * @agent: The #NiceAgent Object
 444  * @stream_id: The ID of the stream
 445  * @ufrag: NULL-terminated string containing an ICE username fragment
 446  *    (length must be between 22 and 256 chars)
 447  * @pwd: NULL-terminated string containing an ICE password
 448  *    (length must be between 4 and 256 chars)
 449  *
 450  * Sets the remote credentials for stream @stream_id.
 451  *
 452  <note>
 453    <para>
 454      Stream credentials do not override per-candidate credentials if set
 455    </para>
 456  </note>
 457  *
 458  * Returns: %TRUE on success, %FALSE on error.
 459  */
 460 gboolean
 461 nice_agent_set_remote_credentials (
 462   NiceAgent *agent,
 463   guint stream_id,
 464   const gchar *ufrag, const gchar *pwd);
 465
 466
 467
 468 /**
 469  * nice_agent_get_local_credentials:
 470  * @agent: The #NiceAgent Object
 471  * @stream_id: The ID of the stream
 472  * @ufrag: a pointer to a NULL-terminated string containing
 473  * an ICE username fragment [OUT].
 474  * This string must be freed with g_free()
 475  * @pwd: a pointer to a NULL-terminated string containing an ICE
 476  * password [OUT]
 477  * This string must be freed with g_free()
 478  *
 479  * Gets the local credentials for stream @stream_id.
 480  *
 481  * Returns: %TRUE on success, %FALSE on error.
 482  */
 483 gboolean
 484 nice_agent_get_local_credentials (
 485   NiceAgent *agent,
 486   guint stream_id,
 487   gchar **ufrag, gchar **pwd);
 488
 489 /**
 490  * nice_agent_set_remote_candidates:
 491  * @agent: The #NiceAgent Object
 492  * @stream_id: The ID of the stream the candidates are for
 493  * @component_id: The ID of the component the candidates are for
 494  * @candidates: a #GSList of #NiceCandidate items describing each candidate to add
 495  *
 496  * Sets, adds or updates the remote candidates for a component of a stream.
 497  *
 498  <note>
 499    <para>
 500     NICE_AGENT_MAX_REMOTE_CANDIDATES is the absolute maximum limit
 501     for remote candidates.
 502    </para>
 503    <para>
 504    You must first call nice_agent_gather_candidates() and wait for the
 505    #NiceAgent::candidate-gathering-done signale before
 506    calling nice_agent_set_remote_candidates()
 507    </para>
 508    <para>
 509     Since 0.1.3, there is no need to wait for the candidate-gathering-done signal.
 510     Remote candidates can be set even while gathering local candidates.
 511     Newly discovered local candidates will automatically be paired with
 512     existing remote candidates.
 513    </para>
 514  </note>
 515  *
 516  * Returns: The number of candidates added, negative on errors (memory allocation
 517  * or if the local candidates are not done gathering yet)
 518  **/
 519 int
 520 nice_agent_set_remote_candidates (
 521   NiceAgent *agent,
 522   guint stream_id,
 523   guint component_id,
 524   const GSList *candidates);
 525
 526
 527 /**
 528  * nice_agent_send:
 529  * @agent: The #NiceAgent Object
 530  * @stream_id: The ID of the stream to send to
 531  * @component_id: The ID of the component to send to
 532  * @len: The length of the buffer to send
 533  * @buf: The buffer of data to send
 534  *
 535  * Sends a data payload over a stream's component.
 536  *
 537  <note>
 538    <para>
 539      Component state MUST be NICE_COMPONENT_STATE_READY, or as a special case,
 540      in any state if component was in READY state before and was then restarted
 541    </para>
 542    <para>
 543    In reliable mode, the -1 error value means either that you are not yet
 544    connected or that the send buffer is full (equivalent to EWOULDBLOCK).
 545    In both cases, you simply need to wait for the
 546    #NiceAgent::reliable-transport-writable signal to be fired before resending
 547    the data.
 548    </para>
 549    <para>
 550    In non-reliable mode, it will virtually never happen with UDP sockets, but
 551    it might happen if the active candidate is a TURN-TCP connection that got
 552    disconnected.
 553    </para>
 554    <para>
 555    In both reliable and non-reliable mode, a -1 error code could also mean that
 556    the stream_id and/or component_id are invalid.
 557    </para>
 558 </note>
 559  *
 560  * Returns: The number of bytes sent, or negative error code
 561  */
 562 gint
 563 nice_agent_send (
 564   NiceAgent *agent,
 565   guint stream_id,
 566   guint component_id,
 567   guint len,
 568   const gchar *buf);
 569
 570 /**
 571  * nice_agent_get_local_candidates:
 572  * @agent: The #NiceAgent Object
 573  * @stream_id: The ID of the stream
 574  * @component_id: The ID of the component
 575  *
 576  * Retreive from the agent the list of all local candidates
 577  * for a stream's component
 578  *
 579  <note>
 580    <para>
 581      The caller owns the returned GSList as well as the candidates contained
 582      within it.
 583      To get full results, the client should wait for the
 584      #NiceAgent::candidate-gathering-done signal.
 585    </para>
 586  </note>
 587  *
 588  * Returns: a #GSList of #NiceCandidate objects representing
 589  * the local candidates of @agent
 590  **/
 591 GSList *
 592 nice_agent_get_local_candidates (
 593   NiceAgent *agent,
 594   guint stream_id,
 595   guint component_id);
 596
 597
 598 /**
 599  * nice_agent_get_remote_candidates:
 600  * @agent: The #NiceAgent Object
 601  * @stream_id: The ID of the stream
 602  * @component_id: The ID of the component
 603  *
 604  * Get a list of the remote candidates set on a stream's component
 605  *
 606  <note>
 607    <para>
 608      The caller owns the returned GSList but not the candidates
 609      contained within it.
 610    </para>
 611    <para>
 612      The list of remote candidates can change during processing.
 613      The client should register for the #NiceAgent::new-remote-candidate signal
 614      to get notified of new remote candidates.
 615    </para>
 616  </note>
 617  *
 618  * Returns: a #GSList of #NiceCandidates objects representing
 619  * the remote candidates set on the @agent
 620  **/
 621 GSList *
 622 nice_agent_get_remote_candidates (
 623   NiceAgent *agent,
 624   guint stream_id,
 625   guint component_id);
 626
 627 /**
 628  * nice_agent_restart:
 629  * @agent: The #NiceAgent Object
 630  *
 631  * Restarts the session as defined in ICE draft 19. This function
 632  * needs to be called both when initiating (ICE spec section 9.1.1.1.
 633  * "ICE Restarts"), as well as when reacting (spec section 9.2.1.1.
 634  * "Detecting ICE Restart") to a restart.
 635  *
 636  * Returns: %TRUE on success %FALSE on error
 637  **/
 638 gboolean
 639 nice_agent_restart (
 640   NiceAgent *agent);
 641
 642
 643 /**
 644  * nice_agent_attach_recv:
 645  * @agent: The #NiceAgent Object
 646  * @stream_id: The ID of stream
 647  * @component_id: The ID of the component
 648  * @ctx: The Glib Mainloop Context to use for listening on the component
 649  * @func: The callback function to be called when data is received on
 650  * the stream's component
 651  * @data: user data associated with the callback
 652  *
 653  * Attaches the stream's component's sockets to the Glib Mainloop Context in
 654  * order to be notified whenever data becomes available for a component.
 655  *
 656  * Returns: %TRUE on success, %FALSE if the stream or component IDs are invalid.
 657  */
 658 gboolean
 659 nice_agent_attach_recv (
 660   NiceAgent *agent,
 661   guint stream_id,
 662   guint component_id,
 663   GMainContext *ctx,
 664   NiceAgentRecvFunc func,
 665   gpointer data);
 666
 667
 668 /**
 669  * nice_agent_set_selected_pair:
 670  * @agent: The #NiceAgent Object
 671  * @stream_id: The ID of the stream
 672  * @component_id: The ID of the component
 673  * @lfoundation: The local foundation of the candidate to use
 674  * @rfoundation: The remote foundation of the candidate to use
 675  *
 676  * Sets the selected candidate pair for media transmission
 677  * for a given stream's component. Calling this function will
 678  * disable all further ICE processing (connection check,
 679  * state machine updates, etc). Note that keepalives will
 680  * continue to be sent.
 681  *
 682  * Returns: %TRUE on success, %FALSE if the candidate pair cannot be found
 683  */
 684 gboolean
 685 nice_agent_set_selected_pair (
 686   NiceAgent *agent,
 687   guint stream_id,
 688   guint component_id,
 689   const gchar *lfoundation,
 690   const gchar *rfoundation);
 691
 692 /**
 693  * nice_agent_set_selected_remote_candidate:
 694  * @agent: The #NiceAgent Object
 695  * @stream_id: The ID of the stream
 696  * @component_id: The ID of the component
 697  * @candidate: The #NiceCandidate to select
 698  *
 699  * Sets the selected remote candidate for media transmission
 700  * for a given stream's component. This is used to force the selection of
 701  * a specific remote candidate even when connectivity checks are failing
 702  * (e.g. non-ICE compatible candidates).
 703  * Calling this function will disable all further ICE processing
 704  * (connection check, state machine updates, etc). Note that keepalives will
 705  * continue to be sent.
 706  *
 707  * Returns: %TRUE on success, %FALSE on failure
 708  */
 709 gboolean
 710 nice_agent_set_selected_remote_candidate (
 711   NiceAgent *agent,
 712   guint stream_id,
 713   guint component_id,
 714   NiceCandidate *candidate);
 715
 716
 717 /**
 718  * nice_agent_set_stream_tos:
 719  * @agent: The #NiceAgent Object
 720  * @stream_id: The ID of the stream
 721  * @tos: The ToS to set
 722  *
 723  * Sets the IP_TOS and/or IPV6_TCLASS field on the stream's sockets' options
 724  *
 725  * Since: 0.0.9
 726  */
 727 void nice_agent_set_stream_tos (
 728   NiceAgent *agent,
 729   guint stream_id,
 730   gint tos);
 731
 732
 733
 734 /**
 735  * nice_agent_set_software:
 736  * @agent: The #NiceAgent Object
 737  * @software: The value of the SOFTWARE attribute to add.
 738  *
 739  * This function will set the value of the SOFTWARE attribute to be added to
 740  * STUN requests, responses and error responses sent during connectivity checks.
 741  * <para>
 742  * The SOFTWARE attribute will only be added in the #NICE_COMPATIBILITY_RFC5245
 743  * and #NICE_COMPATIBILITY_WLM2009 compatibility modes.
 744  *
 745  * </para>
 746  * <note>
 747      <para>
 748        The @software argument will be appended with the libnice version before
 749        being sent.
 750      </para>
 751      <para>
 752        The @software argument must be in UTF-8 encoding and only the first
 753        128 characters will be sent.
 754      </para>
 755    </note>
 756  *
 757  * Since: 0.0.10
 758  *
 759  */
 760 void nice_agent_set_software (NiceAgent *agent, const gchar *software);
 761
 762 G_END_DECLS
 763
 764 #endif /* _AGENT_H */
 765