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/*
* Copyright (c) 1988, 1989, 1990, 1991, 1992, 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.
*
* $FreeBSD$
*/
#ifndef lint
static const char rcsid[] _U_ =
"@(#) $Header: /tcpdump/master/tcpdump/print-ip6.c,v 1.52 2007-09-21 07:05:33 hannes Exp $";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef INET6
#include <tcpdump-stdinc.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "interface.h"
#include "addrtoname.h"
#include "extract.h"
#include "ip6.h"
#include "ipproto.h"
/*
* print an IP6 datagram.
*/
void
ip6_print(register const u_char *bp, register u_int length)
{
register const struct ip6_hdr *ip6;
register int advance;
u_int len;
const u_char *ipend;
register const u_char *cp;
register u_int payload_len;
int nh;
int fragmented = 0;
u_int flow;
ip6 = (const struct ip6_hdr *)bp;
TCHECK(*ip6);
if (length < sizeof (struct ip6_hdr)) {
(void)printf("truncated-ip6 %u", length);
return;
}
if (!eflag)
printf("IP6 ");
payload_len = EXTRACT_16BITS(&ip6->ip6_plen);
len = payload_len + sizeof(struct ip6_hdr);
if (length < len)
(void)printf("truncated-ip6 - %u bytes missing!",
len - length);
if (vflag) {
flow = EXTRACT_32BITS(&ip6->ip6_flow);
printf("(");
#if 0
/* rfc1883 */
if (flow & 0x0f000000)
(void)printf("pri 0x%02x, ", (flow & 0x0f000000) >> 24);
if (flow & 0x00ffffff)
(void)printf("flowlabel 0x%06x, ", flow & 0x00ffffff);
#else
/* RFC 2460 */
if (flow & 0x0ff00000)
(void)printf("class 0x%02x, ", (flow & 0x0ff00000) >> 20);
if (flow & 0x000fffff)
(void)printf("flowlabel 0x%05x, ", flow & 0x000fffff);
#endif
(void)printf("hlim %u, next-header %s (%u) payload length: %u) ",
ip6->ip6_hlim,
tok2str(ipproto_values,"unknown",ip6->ip6_nxt),
ip6->ip6_nxt,
payload_len);
}
/*
* Cut off the snapshot length to the end of the IP payload.
*/
ipend = bp + len;
if (ipend < snapend)
snapend = ipend;
cp = (const u_char *)ip6;
advance = sizeof(struct ip6_hdr);
nh = ip6->ip6_nxt;
while (cp < snapend && advance > 0) {
cp += advance;
len -= advance;
if (cp == (const u_char *)(ip6 + 1) &&
nh != IPPROTO_TCP && nh != IPPROTO_UDP &&
nh != IPPROTO_DCCP && nh != IPPROTO_SCTP) {
(void)printf("%s > %s: ", ip6addr_string(&ip6->ip6_src),
ip6addr_string(&ip6->ip6_dst));
}
switch (nh) {
case IPPROTO_HOPOPTS:
advance = hbhopt_print(cp);
nh = *cp;
break;
case IPPROTO_DSTOPTS:
advance = dstopt_print(cp);
nh = *cp;
break;
case IPPROTO_FRAGMENT:
advance = frag6_print(cp, (const u_char *)ip6);
if (snapend <= cp + advance)
return;
nh = *cp;
fragmented = 1;
break;
case IPPROTO_MOBILITY_OLD:
case IPPROTO_MOBILITY:
/*
* XXX - we don't use "advance"; the current
* "Mobility Support in IPv6" draft
* (draft-ietf-mobileip-ipv6-24) says that
* the next header field in a mobility header
* should be IPPROTO_NONE, but speaks of
* the possiblity of a future extension in
* which payload can be piggybacked atop a
* mobility header.
*/
advance = mobility_print(cp, (const u_char *)ip6);
nh = *cp;
return;
case IPPROTO_ROUTING:
advance = rt6_print(cp, (const u_char *)ip6);
nh = *cp;
break;
case IPPROTO_SCTP:
sctp_print(cp, (const u_char *)ip6, len);
return;
case IPPROTO_DCCP:
dccp_print(cp, (const u_char *)ip6, len);
return;
case IPPROTO_TCP:
tcp_print(cp, len, (const u_char *)ip6, fragmented);
return;
case IPPROTO_UDP:
udp_print(cp, len, (const u_char *)ip6, fragmented);
return;
case IPPROTO_ICMPV6:
icmp6_print(cp, len, (const u_char *)ip6, fragmented);
return;
case IPPROTO_AH:
advance = ah_print(cp);
nh = *cp;
break;
case IPPROTO_ESP:
{
int enh, padlen;
advance = esp_print(gndo, cp, len, (const u_char *)ip6, &enh, &padlen);
nh = enh & 0xff;
len -= padlen;
break;
}
case IPPROTO_IPCOMP:
{
int enh;
advance = ipcomp_print(cp, &enh);
nh = enh & 0xff;
break;
}
case IPPROTO_PIM:
pim_print(cp, len);
return;
case IPPROTO_OSPF:
ospf6_print(cp, len);
return;
case IPPROTO_IPV6:
ip6_print(cp, len);
return;
case IPPROTO_IPV4:
ip_print(gndo, cp, len);
return;
case IPPROTO_PGM:
pgm_print(cp, len, (const u_char *)ip6);
return;
case IPPROTO_GRE:
gre_print(cp, len);
return;
case IPPROTO_RSVP:
rsvp_print(cp, len);
return;
case IPPROTO_NONE:
(void)printf("no next header");
return;
default:
(void)printf("ip-proto-%d %d", nh, len);
return;
}
}
return;
trunc:
(void)printf("[|ip6]");
}
#endif /* INET6 */
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