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/*
* 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 */
#include <config.h>
#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(" [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;
}
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