/*
* 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[] =
"@(#) $Header: /tcpdump/master/tcpdump/print-ip6.c,v 1.16 2000/11/17 19:08:15 itojun Exp $";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef INET6
#include <sys/param.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "interface.h"
#include "addrtoname.h"
#include "ip6.h"
/*
* print an IP6 datagram.
*/
void
ip6_print(register const u_char *bp, register int length)
{
register const struct ip6_hdr *ip6;
register int advance;
register int len;
register const u_char *cp;
int nh;
int fragmented = 0;
u_int flow;
ip6 = (const struct ip6_hdr *)bp;
#ifdef LBL_ALIGN
/*
* The IP6 header is not 16-byte aligned, so copy into abuf.
* This will never happen with BPF. It does happen raw packet
* dumps from -r.
*/
if ((u_long)ip6 & 15) {
static u_char *abuf;
if (abuf == NULL)
abuf = malloc(snaplen);
memcpy(abuf, ip6, min(length, snaplen));
snapend += abuf - (u_char *)ip6;
packetp = abuf;
ip6 = (struct ip6_hdr *)abuf;
}
#endif
if ((u_char *)(ip6 + 1) > snapend) {
printf("[|ip6]");
return;
}
if (length < sizeof (struct ip6_hdr)) {
(void)printf("truncated-ip6 %d", length);
return;
}
advance = sizeof(struct ip6_hdr);
len = ntohs(ip6->ip6_plen);
if (length < len + advance)
(void)printf("truncated-ip6 - %d bytes missing!",
len + advance - length);
cp = (const u_char *)ip6;
nh = ip6->ip6_nxt;
while (cp < snapend) {
cp += advance;
if (cp == (u_char *)(ip6 + 1)
&& nh != IPPROTO_TCP && nh != IPPROTO_UDP) {
(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)
goto end;
nh = *cp;
fragmented = 1;
break;
case IPPROTO_ROUTING:
advance = rt6_print(cp, (const u_char *)ip6);
nh = *cp;
break;
case IPPROTO_TCP:
tcp_print(cp, len + sizeof(struct ip6_hdr) - (cp - bp),
(const u_char *)ip6, fragmented);
goto end;
case IPPROTO_UDP:
udp_print(cp, len + sizeof(struct ip6_hdr) - (cp - bp),
(const u_char *)ip6, fragmented);
goto end;
case IPPROTO_ICMPV6:
icmp6_print(cp, (const u_char *)ip6);
goto end;
case IPPROTO_AH:
advance = ah_print(cp, (const u_char *)ip6);
nh = *cp;
break;
case IPPROTO_ESP:
{
int enh;
advance = esp_print(cp, (const u_char *)ip6, &enh);
if (enh < 0)
goto end;
nh = enh & 0xff;
break;
}
#ifndef IPPROTO_IPCOMP
#define IPPROTO_IPCOMP 108
#endif
case IPPROTO_IPCOMP:
{
int enh;
advance = ipcomp_print(cp, (const u_char *)ip6, &enh);
if (enh < 0)
goto end;
nh = enh & 0xff;
break;
}
#ifndef IPPROTO_PIM
#define IPPROTO_PIM 103
#endif
case IPPROTO_PIM:
pim_print(cp, len);
goto end;
#ifndef IPPROTO_OSPF
#define IPPROTO_OSPF 89
#endif
case IPPROTO_OSPF:
ospf6_print(cp, len);
goto end;
case IPPROTO_IPV6:
ip6_print(cp, len);
goto end;
#ifndef IPPROTO_IPV4
#define IPPROTO_IPV4 4
#endif
case IPPROTO_IPV4:
ip_print(cp, len);
goto end;
case IPPROTO_NONE:
(void)printf("no next header");
goto end;
default:
(void)printf("ip-proto-%d %d", ip6->ip6_nxt, len);
goto end;
}
}
end:
flow = ntohl(ip6->ip6_flow);
#if 0
/* rfc1883 */
if (flow & 0x0f000000)
(void)printf(" [pri 0x%x]", (flow & 0x0f000000) >> 24);
if (flow & 0x00ffffff)
(void)printf(" [flowlabel 0x%x]", flow & 0x00ffffff);
#else
/* RFC 2460 */
if (flow & 0x0ff00000)
(void)printf(" [class 0x%x]", (flow & 0x0ff00000) >> 20);
if (flow & 0x000fffff)
(void)printf(" [flowlabel 0x%x]", flow & 0x000fffff);
#endif
if (ip6->ip6_hlim <= 1)
(void)printf(" [hlim %d]", (int)ip6->ip6_hlim);
if (vflag) {
printf(" (");
(void)printf("len %d", len);
if (ip6->ip6_hlim > 1)
(void)printf(", hlim %d", (int)ip6->ip6_hlim);
printf(")");
}
}
#endif /* INET6 */
