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/**
* @file stun.h STUN API
* @ingroup core
*/
/* purple
*
* Purple is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
#ifndef _PURPLE_STUN_H_
#define _PURPLE_STUN_H_
#ifdef __cplusplus
extern "C" {
#endif
/**************************************************************************/
/** @name STUN API */
/**************************************************************************/
/*@{*/
typedef struct _PurpleStunNatDiscovery PurpleStunNatDiscovery;
typedef enum {
PURPLE_STUN_STATUS_UNDISCOVERED = -1,
PURPLE_STUN_STATUS_UNKNOWN, /* no STUN server reachable */
PURPLE_STUN_STATUS_DISCOVERING,
PURPLE_STUN_STATUS_DISCOVERED
} PurpleStunStatus;
typedef enum {
PURPLE_STUN_NAT_TYPE_PUBLIC_IP,
PURPLE_STUN_NAT_TYPE_UNKNOWN_NAT,
PURPLE_STUN_NAT_TYPE_FULL_CONE,
PURPLE_STUN_NAT_TYPE_RESTRICTED_CONE,
PURPLE_STUN_NAT_TYPE_PORT_RESTRICTED_CONE,
PURPLE_STUN_NAT_TYPE_SYMMETRIC
} PurpleStunNatType;
struct _PurpleStunNatDiscovery {
PurpleStunStatus status;
PurpleStunNatType type;
char publicip[16];
char *servername;
time_t lookup_time;
};
typedef void (*StunCallback) (PurpleStunNatDiscovery *);
/**
* Starts a NAT discovery. It returns a PurpleStunNatDiscovery if the discovery
* is already done. Otherwise the callback is called when the discovery is over
* and NULL is returned.
*
* @param cb The callback to call when the STUN discovery is finished if the
* discovery would block. If the discovery is done, this is NOT
* called.
*
* @return a PurpleStunNatDiscovery which includes the public IP and the type
* of NAT or NULL is discovery would block
*/
PurpleStunNatDiscovery *purple_stun_discover(StunCallback cb);
void purple_stun_init(void);
/*@}*/
#ifdef __cplusplus
}
#endif
#endif /* _PURPLE_STUN_H_ */
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