113 lines
3.4 KiB
C
113 lines
3.4 KiB
C
/* $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;
|
|
}
|