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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 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <netdissect-stdinc.h>
#include <string.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;
const u_char *ep;
u_int i, len, type;
const struct in6_addr *addr;
dp = (const struct ip6_rthdr *)bp;
/* 'ep' points to the end of available data. */
ep = ndo->ndo_snapend;
ND_TCHECK_1(dp->ip6r_segleft);
len = EXTRACT_U_1(dp->ip6r_len);
ND_PRINT("srcrt (len=%u", len); /*)*/
type = EXTRACT_U_1(dp->ip6r_type);
ND_PRINT(", type=%u", type);
ND_PRINT(", segleft=%u", EXTRACT_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;
ND_TCHECK_4(dp0->ip6r0_reserved);
if (EXTRACT_BE_U_4(dp0->ip6r0_reserved) || ndo->ndo_vflag) {
ND_PRINT(", rsv=0x%0x",
EXTRACT_BE_U_4(dp0->ip6r0_reserved));
}
if (len % 2 == 1)
goto trunc;
len >>= 1;
addr = &dp0->ip6r0_addr[0];
for (i = 0; i < len; i++) {
if ((const u_char *)(addr + 1) > ep)
goto trunc;
ND_PRINT(", [%u]%s", i, ip6addr_string(ndo, addr));
addr++;
}
/*(*/
ND_PRINT(") ");
return((EXTRACT_U_1(dp0->ip6r0_len) + 1) << 3);
break;
case IPV6_RTHDR_TYPE_4:
srh = (const struct ip6_srh *)dp;
ND_TCHECK_1(srh->srh_last_ent);
ND_PRINT(", last-entry=%u", EXTRACT_U_1(srh->srh_last_ent));
ND_TCHECK_1(srh->srh_flags);
if (EXTRACT_U_1(srh->srh_flags) || ndo->ndo_vflag) {
ND_PRINT(", flags=0x%0x",
EXTRACT_U_1(srh->srh_flags));
}
ND_TCHECK_2(srh->srh_tag);
ND_PRINT(", tag=%x", EXTRACT_BE_U_2(srh->srh_tag));
if (len % 2 == 1)
goto trunc;
len >>= 1;
addr = &srh->srh_segments[0];
for (i = 0; i < len; i++) {
if ((const u_char *)(addr + 1) > ep)
goto trunc;
ND_PRINT(", [%u]%s", i, ip6addr_string(ndo, addr));
addr++;
}
/*(*/
ND_PRINT(") ");
return((EXTRACT_U_1(srh->srh_len) + 1) << 3);
break;
default:
goto trunc;
break;
}
trunc:
ND_PRINT("[|srcrt]");
return -1;
}
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