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/* $NetBSD: print-ah.c,v 1.4 1996/05/20 00:41:16 fvdl Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/* \summary: IPSEC Authentication Header printer */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "netdissect-stdinc.h"
#include "netdissect.h"
#include "extract.h"
#include "ah.h"
int
ah_print(netdissect_options *ndo, const u_char *bp)
{
const struct ah *ah;
u_int sumlen;
ah = (const struct ah *)bp;
ND_TCHECK_SIZE(ah);
sumlen = EXTRACT_U_1(ah->ah_len) << 2;
ND_PRINT("AH(spi=0x%08x", EXTRACT_BE_U_4(ah->ah_spi));
if (ndo->ndo_vflag)
ND_PRINT(",sumlen=%u", sumlen);
ND_TCHECK_4(ah + 1);
ND_PRINT(",seq=0x%x", EXTRACT_BE_U_4(ah + 1));
if (!ND_TTEST_LEN(bp, sizeof(struct ah) + sumlen)) {
ND_PRINT("[truncated]):");
return -1;
}
ND_PRINT("): ");
return sizeof(struct ah) + sumlen;
trunc:
ND_PRINT("[|AH]");
return -1;
}
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