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/* $OpenBSD: print-udpencap.c,v 1.3 2004/06/23 05:21:18 markus Exp $ */
/*
* Copyright (c) 2003 Markus Friedl. 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 lint
static const char rcsid[] =
"@(#) $Header: /cvs/OpenBSD/src/usr.sbin/tcpdump/print-udpencap.c,v 1.3 2004/06/23 05:21:18 markus Exp $ (XXX)";
#endif
#include <sys/types.h>
#include <stdio.h>
#include "interface.h"
void
udpencap_print(const u_char *bp, u_int len, const u_char *bp2)
{
u_int32_t *spi;
/* Recognize NAT-T Keepalive msgs. (draft-ietf-ipsec-udp-encaps-nn) */
if (len == 1 && *bp == 0xFF) {
if (vflag)
fputs(" ", stdout);
fputs("NAT-T Keepalive", stdout);
return;
}
if (len < sizeof(u_int32_t)) {
fputs(" [|udpencap]", stdout);
return;
}
if (vflag)
fputs(" ", stdout);
fputs("udpencap:", stdout);
spi = (u_int32_t *)(bp);
if (*spi == 0)
ike_print(bp + sizeof(u_int32_t), len - sizeof(u_int32_t));
else {
fputs(" ", stdout);
esp_print(bp, len, bp2);
}
}
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