/*
 * This file is part of the Nice GLib ICE library.
 *
 * (C) 2006, 2007 Collabora Ltd.
 *  Contact: Dafydd Harries
 * (C) 2006, 2007 Nokia Corporation. All rights reserved.
 *  Contact: Kai Vehmanen
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Nice GLib ICE library.
 *
 * The Initial Developers of the Original Code are Collabora Ltd and Nokia
 * Corporation. All Rights Reserved.
 *
 * Contributors:
 *   Dafydd Harries, Collabora Ltd.
 *   Kai Vehmanen, Nokia
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * the GNU Lesser General Public License Version 2.1 (the "LGPL"), in which
 * case the provisions of LGPL are applicable instead of those above. If you
 * wish to allow use of your version of this file only under the terms of the
 * LGPL and not to allow others to use your version of this file under the
 * MPL, indicate your decision by deleting the provisions above and replace
 * them with the notice and other provisions required by the LGPL. If you do
 * not delete the provisions above, a recipient may use your version of this
 * file under either the MPL or the LGPL.
 */

#ifndef _CANDIDATE_H
#define _CANDIDATE_H


/**
 * SECTION:candidate
 * @short_description: ICE candidate representation
 * @see_also: #NiceAddress
 * @stability: Stable
 *
 * A representation of an ICE candidate. Make sure you read the ICE drafts[1] to
 * understand correctly the concept of ICE candidates.
 *
 * [1] http://tools.ietf.org/wg/mmusic/draft-ietf-mmusic-ice/
 */


G_BEGIN_DECLS

#include "socket.h"


#define NICE_CANDIDATE_TYPE_PREF_HOST                 120
#define NICE_CANDIDATE_TYPE_PREF_PEER_REFLEXIVE       110
#define NICE_CANDIDATE_TYPE_PREF_SERVER_REFLEXIVE     100
#define NICE_CANDIDATE_TYPE_PREF_RELAYED               60

/* Max foundation size '1*32ice-char' plus terminating NULL, ICE ID-19  */
/**
 * NICE_CANDIDATE_MAX_FOUNDATION:
 *
 * The maximum size a candidate foundation can have.
 */
#define NICE_CANDIDATE_MAX_FOUNDATION                32+1


/**
 * NiceCandidateType:
 * @NICE_CANDIDATE_TYPE_HOST: A host candidate
 * @NICE_CANDIDATE_TYPE_SERVER_REFLEXIVE: A server reflexive candidate
 * @NICE_CANDIDATE_TYPE_PEER_REFLEXIVE: A peer reflexive candidate
 * @NICE_CANDIDATE_TYPE_RELAYED: A relay candidate
 *
 * An enum represneting the type of a candidate
 */
typedef enum
{
  NICE_CANDIDATE_TYPE_HOST,
  NICE_CANDIDATE_TYPE_SERVER_REFLEXIVE,
  NICE_CANDIDATE_TYPE_PEER_REFLEXIVE,
  NICE_CANDIDATE_TYPE_RELAYED,
} NiceCandidateType;

/**
 * NiceCandidateTransport:
 * @NICE_CANDIDATE_TRANSPORT_UDP: UDP transport
 *
 * An enum representing the type of transport to use
 */
typedef enum
{
  NICE_CANDIDATE_TRANSPORT_UDP,
} NiceCandidateTransport;

/**
 * NiceRelayType:
 * @NICE_RELAY_TYPE_TURN_UDP: A TURN relay using UDP
 * @NICE_RELAY_TYPE_TURN_TCP: A TURN relay using TCP
 * @NICE_RELAY_TYPE_TURN_TLS: A TURN relay using TLS over TCP
 *
 * An enum representing the type of relay to use
 */
typedef enum {
  NICE_RELAY_TYPE_TURN_UDP,
  NICE_RELAY_TYPE_TURN_TCP,
  NICE_RELAY_TYPE_TURN_TLS
} NiceRelayType;


typedef struct _NiceCandidate NiceCandidate;

typedef struct _TurnServer TurnServer;

/**
 * TurnServer:
 * @server: The #NiceAddress of the TURN server
 * @username: The TURN username
 * @password: The TURN password
 * @type: The #NiceRelayType of the server
 *
 * A structure to store the TURN relay settings
 */
struct _TurnServer
{
  NiceAddress server;       /**< TURN server address */
  gchar *username;           /**< TURN username */
  gchar *password;           /**< TURN password */
  NiceRelayType type;             /**< TURN type */
};

/**
 * NiceCandidate:
 * @type: The type of candidate
 * @transport: The transport being used for the candidate
 * @addr: The #NiceAddress of the candidate
 * @base_addr: The #NiceAddress of the base address used by the candidate
 * @priority: The priority of the candidate <emphasis> see note </emphasis>
 * @stream_id: The ID of the stream to which belongs the candidate
 * @component_id: The ID of the component to which belongs the candidate
 * @foundation: The foundation of the candidate
 * @username: The candidate-specific username to use (overrides the one set
 * by nice_agent_set_local_credentials() or nice_agent_set_remote_credentials())
 * @password: The candidate-specific password to use (overrides the one set
 * by nice_agent_set_local_credentials() or nice_agent_set_remote_credentials())
 * @turn: The #TurnServer settings if the candidate is
 * of type %NICE_CANDIDATE_TYPE_RELAYED
 * @sockptr: The underlying socket
 *
 * A structure to represent an ICE candidate
 <note>
   <para>
   The @priority is an integer as specified in the ICE draft 19. If you are
   using the MSN or the GOOGLE compatibility mode (which are based on ICE
   draft 6, which uses a floating point qvalue as priority), then the @priority
   value will represent the qvalue multiplied by 1000.
   </para>
 </note>
 */
struct _NiceCandidate
{
  NiceCandidateType type;
  NiceCandidateTransport transport;
  NiceAddress addr;
  NiceAddress base_addr;
  guint32 priority;
  guint stream_id;
  guint component_id;
  gchar foundation[NICE_CANDIDATE_MAX_FOUNDATION];
  gchar *username;        /* pointer to a NULL-terminated username string */
  gchar *password;        /* pointer to a NULL-terminated password string */
  TurnServer *turn;
  NiceSocket *sockptr;
};

/**
 * nice_candidate_new:
 * @type: The #NiceCandidateType of the candidate to create
 *
 * Creates a new candidate. Must be freed with nice_candidate_free()
 *
 * Returns: A new #NiceCandidate
 */
NiceCandidate *
nice_candidate_new (NiceCandidateType type);

/**
 * nice_candidate_free:
 * @candidate: The candidate to free
 *
 * Frees a #NiceCandidate
 */
void
nice_candidate_free (NiceCandidate *candidate);

/**
 * nice_candidate_copy:
 * @candidate: The candidate to copy
 *
 * Makes a copy of a #NiceCandidate
 *
 * Returns: A new #NiceCandidate, a copy of @candidate
 */
NiceCandidate *
nice_candidate_copy (const NiceCandidate *candidate);


guint32
nice_candidate_jingle_priority (NiceCandidate *candidate);

guint32
nice_candidate_msn_priority (NiceCandidate *candidate);

guint32
nice_candidate_ice_priority_full (guint type_pref, guint local_pref,
    guint component_id);

guint32
nice_candidate_ice_priority (const NiceCandidate *candidate);

guint64
nice_candidate_pair_priority (guint32 o_prio, guint32 a_prio);


G_END_DECLS

#endif /* _CANDIDATE_H */

