313 lines
8.3 KiB
C
313 lines
8.3 KiB
C
/*
|
|
* Copyright (C) 2002 WIDE Project.
|
|
* All rights reserved.
|
|
*
|
|
* 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. Neither the name of the project 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 PROJECT 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 PROJECT 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-mobility.c,v 1.11.2.1 2005/04/20 22:21:16 guy Exp $";
|
|
#endif
|
|
|
|
#ifdef INET6
|
|
#include <tcpdump-stdinc.h>
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "ip6.h"
|
|
|
|
#include "interface.h"
|
|
#include "addrtoname.h"
|
|
#include "extract.h" /* must come after interface.h */
|
|
|
|
/* Mobility header */
|
|
struct ip6_mobility {
|
|
u_int8_t ip6m_pproto; /* following payload protocol (for PG) */
|
|
u_int8_t ip6m_len; /* length in units of 8 octets */
|
|
u_int8_t ip6m_type; /* message type */
|
|
u_int8_t reserved; /* reserved */
|
|
u_int16_t ip6m_cksum; /* sum of IPv6 pseudo-header and MH */
|
|
union {
|
|
u_int16_t ip6m_un_data16[1]; /* type-specific field */
|
|
u_int8_t ip6m_un_data8[2]; /* type-specific fiedl */
|
|
} ip6m_dataun;
|
|
};
|
|
|
|
#define ip6m_data16 ip6m_dataun.ip6m_un_data16
|
|
#define ip6m_data8 ip6m_dataun.ip6m_un_data8
|
|
|
|
#define IP6M_MINLEN 8
|
|
|
|
/* message type */
|
|
#define IP6M_BINDING_REQUEST 0 /* Binding Refresh Request */
|
|
#define IP6M_HOME_TEST_INIT 1 /* Home Test Init */
|
|
#define IP6M_CAREOF_TEST_INIT 2 /* Care-of Test Init */
|
|
#define IP6M_HOME_TEST 3 /* Home Test */
|
|
#define IP6M_CAREOF_TEST 4 /* Care-of Test */
|
|
#define IP6M_BINDING_UPDATE 5 /* Binding Update */
|
|
#define IP6M_BINDING_ACK 6 /* Binding Acknowledgement */
|
|
#define IP6M_BINDING_ERROR 7 /* Binding Error */
|
|
|
|
/* Mobility Header Options */
|
|
#define IP6MOPT_MINLEN 2
|
|
#define IP6MOPT_PAD1 0x0 /* Pad1 */
|
|
#define IP6MOPT_PADN 0x1 /* PadN */
|
|
#define IP6MOPT_REFRESH 0x2 /* Binding Refresh Advice */
|
|
#define IP6MOPT_REFRESH_MINLEN 4
|
|
#define IP6MOPT_ALTCOA 0x3 /* Alternate Care-of Address */
|
|
#define IP6MOPT_ALTCOA_MINLEN 18
|
|
#define IP6MOPT_NONCEID 0x4 /* Nonce Indices */
|
|
#define IP6MOPT_NONCEID_MINLEN 6
|
|
#define IP6MOPT_AUTH 0x5 /* Binding Authorization Data */
|
|
#define IP6MOPT_AUTH_MINLEN 12
|
|
|
|
static void
|
|
mobility_opt_print(const u_char *bp, int len)
|
|
{
|
|
int i;
|
|
int optlen;
|
|
|
|
for (i = 0; i < len; i += optlen) {
|
|
if (bp[i] == IP6MOPT_PAD1)
|
|
optlen = 1;
|
|
else {
|
|
if (i + 1 < len)
|
|
optlen = bp[i + 1] + 2;
|
|
else
|
|
goto trunc;
|
|
}
|
|
if (i + optlen > len)
|
|
goto trunc;
|
|
|
|
switch (bp[i]) {
|
|
case IP6MOPT_PAD1:
|
|
printf("(pad1)");
|
|
break;
|
|
case IP6MOPT_PADN:
|
|
if (len - i < IP6MOPT_MINLEN) {
|
|
printf("(padn: trunc)");
|
|
goto trunc;
|
|
}
|
|
printf("(padn)");
|
|
break;
|
|
case IP6MOPT_REFRESH:
|
|
if (len - i < IP6MOPT_REFRESH_MINLEN) {
|
|
printf("(refresh: trunc)");
|
|
goto trunc;
|
|
}
|
|
/* units of 4 secs */
|
|
printf("(refresh: %d)",
|
|
EXTRACT_16BITS(&bp[i+2]) << 2);
|
|
break;
|
|
case IP6MOPT_ALTCOA:
|
|
if (len - i < IP6MOPT_ALTCOA_MINLEN) {
|
|
printf("(altcoa: trunc)");
|
|
goto trunc;
|
|
}
|
|
printf("(alt-CoA: %s)", ip6addr_string(&bp[i+2]));
|
|
break;
|
|
case IP6MOPT_NONCEID:
|
|
if (len - i < IP6MOPT_NONCEID_MINLEN) {
|
|
printf("(ni: trunc)");
|
|
goto trunc;
|
|
}
|
|
printf("(ni: ho=0x%04x co=0x%04x)",
|
|
EXTRACT_16BITS(&bp[i+2]),
|
|
EXTRACT_16BITS(&bp[i+4]));
|
|
break;
|
|
case IP6MOPT_AUTH:
|
|
if (len - i < IP6MOPT_AUTH_MINLEN) {
|
|
printf("(auth: trunc)");
|
|
goto trunc;
|
|
}
|
|
printf("(auth)");
|
|
break;
|
|
default:
|
|
if (len - i < IP6MOPT_MINLEN) {
|
|
printf("(sopt_type %d: trunc)", bp[i]);
|
|
goto trunc;
|
|
}
|
|
printf("(type-0x%02x: len=%d)", bp[i], bp[i + 1]);
|
|
break;
|
|
}
|
|
}
|
|
return;
|
|
|
|
trunc:
|
|
printf("[trunc] ");
|
|
}
|
|
|
|
/*
|
|
* Mobility Header
|
|
*/
|
|
int
|
|
mobility_print(const u_char *bp, const u_char *bp2 _U_)
|
|
{
|
|
const struct ip6_mobility *mh;
|
|
const u_char *ep;
|
|
int mhlen, hlen, type;
|
|
|
|
mh = (struct ip6_mobility *)bp;
|
|
|
|
/* 'ep' points to the end of available data. */
|
|
ep = snapend;
|
|
|
|
if (!TTEST(mh->ip6m_len)) {
|
|
/*
|
|
* There's not enough captured data to include the
|
|
* mobility header length.
|
|
*
|
|
* Our caller expects us to return the length, however,
|
|
* so return a value that will run to the end of the
|
|
* captured data.
|
|
*
|
|
* XXX - "ip6_print()" doesn't do anything with the
|
|
* returned length, however, as it breaks out of the
|
|
* header-processing loop.
|
|
*/
|
|
mhlen = ep - bp;
|
|
goto trunc;
|
|
}
|
|
mhlen = (int)((mh->ip6m_len + 1) << 3);
|
|
|
|
/* XXX ip6m_cksum */
|
|
|
|
TCHECK(mh->ip6m_type);
|
|
type = mh->ip6m_type;
|
|
switch (type) {
|
|
case IP6M_BINDING_REQUEST:
|
|
printf("mobility: BRR");
|
|
hlen = IP6M_MINLEN;
|
|
break;
|
|
case IP6M_HOME_TEST_INIT:
|
|
case IP6M_CAREOF_TEST_INIT:
|
|
printf("mobility: %soTI",
|
|
type == IP6M_HOME_TEST_INIT ? "H" : "C");
|
|
hlen = IP6M_MINLEN;
|
|
if (vflag) {
|
|
TCHECK2(*mh, hlen + 8);
|
|
printf(" %s Init Cookie=%08x:%08x",
|
|
type == IP6M_HOME_TEST_INIT ? "Home" : "Care-of",
|
|
EXTRACT_32BITS(&bp[hlen]),
|
|
EXTRACT_32BITS(&bp[hlen + 4]));
|
|
}
|
|
hlen += 8;
|
|
break;
|
|
case IP6M_HOME_TEST:
|
|
case IP6M_CAREOF_TEST:
|
|
printf("mobility: %soT",
|
|
type == IP6M_HOME_TEST ? "H" : "C");
|
|
TCHECK(mh->ip6m_data16[0]);
|
|
printf(" nonce id=0x%x", EXTRACT_16BITS(&mh->ip6m_data16[0]));
|
|
hlen = IP6M_MINLEN;
|
|
if (vflag) {
|
|
TCHECK2(*mh, hlen + 8);
|
|
printf(" %s Init Cookie=%08x:%08x",
|
|
type == IP6M_HOME_TEST ? "Home" : "Care-of",
|
|
EXTRACT_32BITS(&bp[hlen]),
|
|
EXTRACT_32BITS(&bp[hlen + 4]));
|
|
}
|
|
hlen += 8;
|
|
if (vflag) {
|
|
TCHECK2(*mh, hlen + 8);
|
|
printf(" %s Keygen Token=%08x:%08x",
|
|
type == IP6M_HOME_TEST ? "Home" : "Care-of",
|
|
EXTRACT_32BITS(&bp[hlen]),
|
|
EXTRACT_32BITS(&bp[hlen + 4]));
|
|
}
|
|
hlen += 8;
|
|
break;
|
|
case IP6M_BINDING_UPDATE:
|
|
printf("mobility: BU");
|
|
TCHECK(mh->ip6m_data16[0]);
|
|
printf(" seq#=%d", EXTRACT_16BITS(&mh->ip6m_data16[0]));
|
|
hlen = IP6M_MINLEN;
|
|
TCHECK2(*mh, hlen + 1);
|
|
if (bp[hlen] & 0xf0)
|
|
printf(" ");
|
|
if (bp[hlen] & 0x80)
|
|
printf("A");
|
|
if (bp[hlen] & 0x40)
|
|
printf("H");
|
|
if (bp[hlen] & 0x20)
|
|
printf("L");
|
|
if (bp[hlen] & 0x10)
|
|
printf("K");
|
|
/* Reserved (4bits) */
|
|
hlen += 1;
|
|
/* Reserved (8bits) */
|
|
hlen += 1;
|
|
TCHECK2(*mh, hlen + 2);
|
|
/* units of 4 secs */
|
|
printf(" lifetime=%d", EXTRACT_16BITS(&bp[hlen]) << 2);
|
|
hlen += 2;
|
|
break;
|
|
case IP6M_BINDING_ACK:
|
|
printf("mobility: BA");
|
|
TCHECK(mh->ip6m_data8[0]);
|
|
printf(" status=%d", mh->ip6m_data8[0]);
|
|
if (mh->ip6m_data8[1] & 0x80)
|
|
printf(" K");
|
|
/* Reserved (7bits) */
|
|
hlen = IP6M_MINLEN;
|
|
TCHECK2(*mh, hlen + 2);
|
|
printf(" seq#=%d", EXTRACT_16BITS(&bp[hlen]));
|
|
hlen += 2;
|
|
TCHECK2(*mh, hlen + 2);
|
|
/* units of 4 secs */
|
|
printf(" lifetime=%d", EXTRACT_16BITS(&bp[hlen]) << 2);
|
|
hlen += 2;
|
|
break;
|
|
case IP6M_BINDING_ERROR:
|
|
printf("mobility: BE");
|
|
TCHECK(mh->ip6m_data8[0]);
|
|
printf(" status=%d", mh->ip6m_data8[0]);
|
|
/* Reserved */
|
|
hlen = IP6M_MINLEN;
|
|
TCHECK2(*mh, hlen + 16);
|
|
printf(" homeaddr %s", ip6addr_string(&bp[hlen]));
|
|
hlen += 16;
|
|
break;
|
|
default:
|
|
printf("mobility: type-#%d len=%d", type, mh->ip6m_len);
|
|
return(mhlen);
|
|
break;
|
|
}
|
|
if (vflag)
|
|
mobility_opt_print(&bp[hlen], mhlen - hlen);
|
|
|
|
return(mhlen);
|
|
|
|
trunc:
|
|
fputs("[|MOBILITY]", stdout);
|
|
return(mhlen);
|
|
}
|
|
#endif /* INET6 */
|