/* * Copyright (c) 1988, 1989, 1990, 1991, 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. */#ifndef lintstatic const char rcsid[] _U_ =    "@(#) $Header: /tcpdump/master/tcpdump/print-ipcomp.c,v 1.20 2003-11-19 00:36:08 guy Exp $";#endif#ifdef HAVE_CONFIG_H#include "config.h"#endif#include <string.h>#include <tcpdump-stdinc.h>#include <stdio.h>struct ipcomp {	u_int8_t comp_nxt;	/* Next Header */	u_int8_t comp_flags;	/* Length of data, in 32bit */	u_int16_t comp_cpi;	/* Compression parameter index */};#if defined(HAVE_LIBZ) && defined(HAVE_ZLIB_H)#include <zlib.h>#endif#include "interface.h"#include "addrtoname.h"#include "extract.h"intipcomp_print(register const u_char *bp, int *nhdr _U_){	register const struct ipcomp *ipcomp;	register const u_char *ep;	u_int16_t cpi;#if defined(HAVE_LIBZ) && defined(HAVE_ZLIB_H)	int advance;#endif	ipcomp = (struct ipcomp *)bp;	cpi = EXTRACT_16BITS(&ipcomp->comp_cpi);	/* 'ep' points to the end of available data. */	ep = snapend;	if ((u_char *)(ipcomp + 1) >= ep - sizeof(struct ipcomp)) {		fputs("[|IPCOMP]", stdout);		goto fail;	}	printf("IPComp(cpi=0x%04x)", cpi);#if defined(HAVE_LIBZ) && defined(HAVE_ZLIB_H)	if (1)		goto fail;	/*	 * We may want to decompress the packet here.  Packet buffer	 * management is a headache (if we decompress, packet will become	 * larger).	 */	if (nhdr)		*nhdr = ipcomp->comp_nxt;	advance = sizeof(struct ipcomp);	printf(": ");	return advance;#endiffail:	return -1;}