nat_detect.h

/* $Id: nat_detect.h 3553 2011-05-05 06:14:19Z nanang $ */
/* 
 * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
 * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
 */
#ifndef __PJNATH_NAT_DETECT_H__
#define __PJNATH_NAT_DETECT_H__

#include <pjnath/stun_session.h>


PJ_BEGIN_DECL


typedef enum pj_stun_nat_type
{
    PJ_STUN_NAT_TYPE_UNKNOWN,

    PJ_STUN_NAT_TYPE_ERR_UNKNOWN,

    PJ_STUN_NAT_TYPE_OPEN,

    PJ_STUN_NAT_TYPE_BLOCKED,

    PJ_STUN_NAT_TYPE_SYMMETRIC_UDP,

    PJ_STUN_NAT_TYPE_FULL_CONE,

    PJ_STUN_NAT_TYPE_SYMMETRIC,

    PJ_STUN_NAT_TYPE_RESTRICTED,

    PJ_STUN_NAT_TYPE_PORT_RESTRICTED

} pj_stun_nat_type;


typedef struct pj_stun_nat_detect_result
{
    pj_status_t          status;

    const char          *status_text;

    pj_stun_nat_type     nat_type;

    const char          *nat_type_name;

} pj_stun_nat_detect_result;


typedef void pj_stun_nat_detect_cb(void *user_data,
                                   const pj_stun_nat_detect_result *res);


PJ_DECL(const char*) pj_stun_get_nat_name(pj_stun_nat_type type);


PJ_DECL(pj_status_t) pj_stun_detect_nat_type(const pj_sockaddr_in *server,
                                             pj_stun_config *stun_cfg,
                                             void *user_data,
                                             pj_stun_nat_detect_cb *cb);


PJ_END_DECL


#endif  /* __PJNATH_NAT_DETECT_H__ */