1 /* $OpenBSD: nat_traversal.h,v 1.4 2005/07/25 15:03:47 hshoexer Exp $ */ 2 3 /* 4 * Copyright (c) 2004 H�kan Olsson. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef _NAT_TRAVERSAL_H_ 28 #define _NAT_TRAVERSAL_H_ 29 30 #define VID_DRAFT_V2 0 31 #define VID_DRAFT_V2_N 1 32 #define VID_DRAFT_V3 2 33 #define VID_RFC3947 3 34 35 struct nat_t_cap { 36 int id; 37 u_int32_t flags; 38 const char *text; 39 char *hash; 40 size_t hashsize; 41 }; 42 43 /* 44 * Set if -T is given on the command line to disable NAT-T support. 45 */ 46 extern int disable_nat_t; 47 48 void nat_t_init(void); 49 int nat_t_add_vendor_payloads(struct message *); 50 void nat_t_check_vendor_payload(struct message *, struct payload *); 51 int nat_t_exchange_add_nat_d(struct message *); 52 int nat_t_exchange_check_nat_d(struct message *); 53 void nat_t_setup_keepalive(struct sa *); 54 55 #endif /* _NAT_TRAVERSAL_H_ */ 56