mirror of
https://github.com/the-tcpdump-group/tcpdump.git
synced 2024-11-23 18:14:29 +08:00
116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that: (1) source code distributions
|
|
* retain the above copyright notice and this paragraph in its entirety, (2)
|
|
* distributions including binary code include the above copyright notice and
|
|
* this paragraph in its entirety in the documentation or other materials
|
|
* provided with the distribution, and (3) all advertising materials mentioning
|
|
* features or use of this software display the following acknowledgement:
|
|
* ``This product includes software developed by the University of California,
|
|
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
|
|
* the University 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
*/
|
|
|
|
/* \summary: IPv6 routing header printer */
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#include "netdissect-stdinc.h"
|
|
|
|
#include "netdissect.h"
|
|
#include "addrtoname.h"
|
|
#include "extract.h"
|
|
|
|
#include "ip6.h"
|
|
|
|
int
|
|
rt6_print(netdissect_options *ndo, const u_char *bp, const u_char *bp2 _U_)
|
|
{
|
|
const struct ip6_rthdr *dp;
|
|
const struct ip6_rthdr0 *dp0;
|
|
const struct ip6_srh *srh;
|
|
u_int i, len, type;
|
|
const u_char *p;
|
|
|
|
ndo->ndo_protocol = "rt6";
|
|
|
|
nd_print_protocol_caps(ndo);
|
|
dp = (const struct ip6_rthdr *)bp;
|
|
|
|
len = GET_U_1(dp->ip6r_len);
|
|
ND_PRINT(" (len=%u", len); /*)*/
|
|
type = GET_U_1(dp->ip6r_type);
|
|
ND_PRINT(", type=%u", type);
|
|
if (type == IPV6_RTHDR_TYPE_0)
|
|
ND_PRINT(" [Deprecated]");
|
|
ND_PRINT(", segleft=%u", GET_U_1(dp->ip6r_segleft));
|
|
|
|
switch (type) {
|
|
case IPV6_RTHDR_TYPE_0:
|
|
case IPV6_RTHDR_TYPE_2: /* Mobile IPv6 ID-20 */
|
|
dp0 = (const struct ip6_rthdr0 *)dp;
|
|
|
|
if (GET_BE_U_4(dp0->ip6r0_reserved) || ndo->ndo_vflag) {
|
|
ND_PRINT(", rsv=0x%0x",
|
|
GET_BE_U_4(dp0->ip6r0_reserved));
|
|
}
|
|
|
|
if (len % 2 == 1) {
|
|
ND_PRINT(" (invalid length %u)", len);
|
|
goto invalid;
|
|
}
|
|
len >>= 1;
|
|
p = (const u_char *) dp0->ip6r0_addr;
|
|
for (i = 0; i < len; i++) {
|
|
ND_PRINT(", [%u]%s", i, GET_IP6ADDR_STRING(p));
|
|
p += 16;
|
|
}
|
|
/*(*/
|
|
ND_PRINT(") ");
|
|
return((GET_U_1(dp0->ip6r0_len) + 1) << 3);
|
|
break;
|
|
case IPV6_RTHDR_TYPE_4:
|
|
srh = (const struct ip6_srh *)dp;
|
|
ND_PRINT(", last-entry=%u", GET_U_1(srh->srh_last_ent));
|
|
|
|
if (GET_U_1(srh->srh_flags) || ndo->ndo_vflag) {
|
|
ND_PRINT(", flags=0x%0x",
|
|
GET_U_1(srh->srh_flags));
|
|
}
|
|
|
|
ND_PRINT(", tag=%x", GET_BE_U_2(srh->srh_tag));
|
|
|
|
if (len % 2 == 1) {
|
|
ND_PRINT(" (invalid length %u)", len);
|
|
goto invalid;
|
|
}
|
|
len >>= 1;
|
|
p = (const u_char *) srh->srh_segments;
|
|
for (i = 0; i < len; i++) {
|
|
ND_PRINT(", [%u]%s", i, GET_IP6ADDR_STRING(p));
|
|
p += 16;
|
|
}
|
|
/*(*/
|
|
ND_PRINT(") ");
|
|
return((GET_U_1(srh->srh_len) + 1) << 3);
|
|
break;
|
|
default:
|
|
ND_PRINT(" (unknown type)");
|
|
goto invalid;
|
|
}
|
|
|
|
invalid:
|
|
nd_print_invalid(ndo);
|
|
return -1;
|
|
}
|