| /* $NetBSD: print-mobile.c,v 1.2 1998/09/30 08:57:01 hwr Exp $ */ |
| |
| /* |
| * (c) 1998 The NetBSD Foundation, Inc. |
| * All rights reserved. |
| * |
| * This code is derived from software contributed to The NetBSD Foundation |
| * by Heiko W.Rupp <hwr@pilhuhn.de> |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * This product includes software developed by the NetBSD |
| * Foundation, Inc. and its contributors. |
| * 4. Neither the name of The NetBSD Foundation 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 BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #ifndef lint |
| static const char rcsid[] _U_ = |
| "@(#) $Header: /tcpdump/master/tcpdump/print-mobile.c,v 1.15 2004-03-24 01:58:14 guy Exp $"; |
| #endif |
| |
| #include <tcpdump-stdinc.h> |
| |
| #include <stdio.h> |
| |
| #include "interface.h" |
| #include "addrtoname.h" |
| #include "extract.h" /* must come after interface.h */ |
| |
| #define MOBILE_SIZE (8) |
| |
| struct mobile_ip { |
| u_int16_t proto; |
| u_int16_t hcheck; |
| u_int32_t odst; |
| u_int32_t osrc; |
| }; |
| |
| #define OSRC_PRES 0x0080 /* old source is present */ |
| |
| /* |
| * Deencapsulate and print a mobile-tunneled IP datagram |
| */ |
| void |
| mobile_print(const u_char *bp, u_int length) |
| { |
| const u_char *cp = bp +8 ; |
| const struct mobile_ip *mob; |
| struct cksum_vec vec[1]; |
| u_short proto,crc; |
| u_char osp =0; /* old source address present */ |
| |
| mob = (const struct mobile_ip *)bp; |
| |
| if (length < MOBILE_SIZE || !TTEST(*mob)) { |
| fputs("[|mobile]", stdout); |
| return; |
| } |
| fputs("mobile: ", stdout); |
| |
| proto = EXTRACT_16BITS(&mob->proto); |
| crc = EXTRACT_16BITS(&mob->hcheck); |
| if (proto & OSRC_PRES) { |
| osp=1; |
| cp +=4 ; |
| } |
| |
| if (osp) { |
| fputs("[S] ",stdout); |
| if (vflag) |
| (void)printf("%s ",ipaddr_string(&mob->osrc)); |
| } else { |
| fputs("[] ",stdout); |
| } |
| if (vflag) { |
| (void)printf("> %s ",ipaddr_string(&mob->odst)); |
| (void)printf("(oproto=%d)",proto>>8); |
| } |
| vec[0].ptr = (const u_int8_t *)(void *)mob; |
| vec[0].len = osp ? 12 : 8; |
| if (in_cksum(vec, 1)!=0) { |
| (void)printf(" (bad checksum %d)",crc); |
| } |
| |
| return; |
| } |