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/* $OpenBSD: nat_traversal.h,v 1.4 2005/07/25 15:03:47 hshoexer Exp $ */
/*
* Copyright (c) 2004 Håkan Olsson. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _NAT_TRAVERSAL_H_
#define _NAT_TRAVERSAL_H_
#define VID_DRAFT_V2 0
#define VID_DRAFT_V2_N 1
#define VID_DRAFT_V3 2
#define VID_RFC3947 3
struct nat_t_cap {
int id;
u_int32_t flags;
const char *text;
char *hash;
size_t hashsize;
};
/*
* Set if -T is given on the command line to disable NAT-T support.
*/
extern int disable_nat_t;
void nat_t_init(void);
int nat_t_add_vendor_payloads(struct message *);
void nat_t_check_vendor_payload(struct message *, struct payload *);
int nat_t_exchange_add_nat_d(struct message *);
int nat_t_exchange_check_nat_d(struct message *);
void nat_t_setup_keepalive(struct sa *);
#endif /* _NAT_TRAVERSAL_H_ */
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