| /* |
| * 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 lint |
| static 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" |
| |
| int |
| ipcomp_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; |
| |
| #endif |
| fail: |
| return -1; |
| } |