Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

113 lines (97 sloc) 3.489 kb
/* $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;
}
Jump to Line
Something went wrong with that request. Please try again.