phunix/external/bsd/tcpdump/dist/print-ipcomp.c
David van Moolenbroek b636d99d91 Import NetBSD tcpdump(8)
For now, printing of Sun RPC requests is disabled because we do not
yet have the RPC header files.  This should affect basically noone,
as we do not have any RPC-based programs yet, for the same reason.

Change-Id: Ie7818faaaacdc104d8b2c37a68866b4ce18247d6
2017-03-21 22:00:21 +00:00

89 lines
2.5 KiB
C

/*
* 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: print-ipcomp.c,v 1.4 2014/11/20 03:05:03 christos Exp $");
#endif
#define NETDISSECT_REWORKED
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
struct ipcomp {
uint8_t comp_nxt; /* Next Header */
uint8_t comp_flags; /* Length of data, in 32bit */
uint16_t comp_cpi; /* Compression parameter index */
};
#if defined(HAVE_LIBZ) && defined(HAVE_ZLIB_H)
#include <zlib.h>
#endif
#include "interface.h"
#include "extract.h"
int
ipcomp_print(netdissect_options *ndo, register const u_char *bp, int *nhdr _U_)
{
register const struct ipcomp *ipcomp;
register const u_char *ep;
uint16_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 = ndo->ndo_snapend;
if ((u_char *)(ipcomp + 1) >= ep - sizeof(struct ipcomp)) {
ND_PRINT((ndo, "[|IPCOMP]"));
goto fail;
}
ND_PRINT((ndo, "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);
ND_PRINT((ndo, ": "));
return advance;
#endif
fail:
return -1;
}