12949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project/* 22949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994 32949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * The Regents of the University of California. All rights reserved. 42949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 52949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * Redistribution and use in source and binary forms, with or without 62949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * modification, are permitted provided that: (1) source code distributions 72949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * retain the above copyright notice and this paragraph in its entirety, (2) 82949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * distributions including binary code include the above copyright notice and 92949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * this paragraph in its entirety in the documentation or other materials 102949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * provided with the distribution, and (3) all advertising materials mentioning 112949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * features or use of this software display the following acknowledgement: 122949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * ``This product includes software developed by the University of California, 132949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 142949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * the University nor the names of its contributors may be used to endorse 152949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * or promote products derived from this software without specific prior 162949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * written permission. 172949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 182949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 192949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 202949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project */ 212949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 222949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#ifndef lint 232949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Projectstatic const char rcsid[] _U_ = 2453f17a9db278d33517d9888dd77848f554522a38JP Abgrall "@(#) $Header: /tcpdump/master/tcpdump/print-ipcomp.c,v 1.20 2003-11-19 00:36:08 guy Exp $"; 252949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#endif 262949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 272949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#ifdef HAVE_CONFIG_H 282949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include "config.h" 292949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#endif 302949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 312949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include <string.h> 322949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include <tcpdump-stdinc.h> 332949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 342949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include <stdio.h> 352949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 362949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Projectstruct ipcomp { 372949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project u_int8_t comp_nxt; /* Next Header */ 382949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project u_int8_t comp_flags; /* Length of data, in 32bit */ 392949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project u_int16_t comp_cpi; /* Compression parameter index */ 402949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project}; 412949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 422949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#if defined(HAVE_LIBZ) && defined(HAVE_ZLIB_H) 432949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include <zlib.h> 442949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#endif 452949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 462949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include "interface.h" 472949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include "addrtoname.h" 482949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include "extract.h" 492949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 502949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Projectint 512949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Projectipcomp_print(register const u_char *bp, int *nhdr _U_) 522949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project{ 532949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project register const struct ipcomp *ipcomp; 542949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project register const u_char *ep; 552949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project u_int16_t cpi; 562949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#if defined(HAVE_LIBZ) && defined(HAVE_ZLIB_H) 572949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project int advance; 582949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#endif 592949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 602949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project ipcomp = (struct ipcomp *)bp; 612949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project cpi = EXTRACT_16BITS(&ipcomp->comp_cpi); 622949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 632949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project /* 'ep' points to the end of available data. */ 642949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project ep = snapend; 652949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 662949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project if ((u_char *)(ipcomp + 1) >= ep - sizeof(struct ipcomp)) { 672949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project fputs("[|IPCOMP]", stdout); 682949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project goto fail; 692949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project } 702949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project printf("IPComp(cpi=0x%04x)", cpi); 712949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 722949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#if defined(HAVE_LIBZ) && defined(HAVE_ZLIB_H) 732949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project if (1) 742949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project goto fail; 752949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 762949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project /* 772949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * We may want to decompress the packet here. Packet buffer 782949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * management is a headache (if we decompress, packet will become 792949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * larger). 802949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project */ 812949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project if (nhdr) 822949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project *nhdr = ipcomp->comp_nxt; 832949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project advance = sizeof(struct ipcomp); 842949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 852949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project printf(": "); 862949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project return advance; 872949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 882949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#endif 892949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Projectfail: 902949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project return -1; 912949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project} 92