[dragonfly.git] / contrib / tcpdump / print-ip6.c

/*
 * 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.
 */

#ifndef lint
static const char rcsid[] _U_ =
    "@(#) $Header: /tcpdump/master/tcpdump/print-ip6.c,v 1.47.2.5 2007/09/21 07:07:52 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 */
Commit	Line	Data
c8cf0f94 PA	1	/*
	2	* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that: (1) source code distributions
	7	* retain the above copyright notice and this paragraph in its entirety, (2)
	8	* distributions including binary code include the above copyright notice and
	9	* this paragraph in its entirety in the documentation or other materials
	10	* provided with the distribution, and (3) all advertising materials mentioning
	11	* features or use of this software display the following acknowledgement:
	12	* ``This product includes software developed by the University of California,
	13	* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
	14	* the University nor the names of its contributors may be used to endorse
	15	* or promote products derived from this software without specific prior
	16	* written permission.
	17	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
	18	* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
	19	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
	20	*/
	21
	22	#ifndef lint
	23	static const char rcsid[] _U_ =
825e8fa1	24	"@(#) $Header: /tcpdump/master/tcpdump/print-ip6.c,v 1.47.2.5 2007/09/21 07:07:52 hannes Exp $";
c8cf0f94 PA	25	#endif
	26
	27	#ifdef HAVE_CONFIG_H
	28	#include "config.h"
	29	#endif
	30
	31	#ifdef INET6
	32
	33	#include <tcpdump-stdinc.h>
	34
	35	#include <stdio.h>
	36	#include <stdlib.h>
	37	#include <string.h>
	38
	39	#include "interface.h"
	40	#include "addrtoname.h"
	41	#include "extract.h"
	42
	43	#include "ip6.h"
	44	#include "ipproto.h"
	45
	46	/*
	47	* print an IP6 datagram.
	48	*/
	49	void
	50	ip6_print(register const u_char *bp, register u_int length)
	51	{
	52	register const struct ip6_hdr *ip6;
	53	register int advance;
	54	u_int len;
	55	const u_char *ipend;
	56	register const u_char *cp;
	57	register u_int payload_len;
	58	int nh;
	59	int fragmented = 0;
	60	u_int flow;
	61
	62	ip6 = (const struct ip6_hdr *)bp;
	63
	64	TCHECK(*ip6);
	65	if (length < sizeof (struct ip6_hdr)) {
	66	(void)printf("truncated-ip6 %u", length);
	67	return;
	68	}
	69
	70	if (!eflag)
	71	printf("IP6 ");
	72
	73	payload_len = EXTRACT_16BITS(&ip6->ip6_plen);
	74	len = payload_len + sizeof(struct ip6_hdr);
	75	if (length < len)
	76	(void)printf("truncated-ip6 - %u bytes missing!",
	77	len - length);
	78
	79	if (vflag) {
	80	flow = EXTRACT_32BITS(&ip6->ip6_flow);
	81	printf("(");
	82	#if 0
	83	/* rfc1883 */
	84	if (flow & 0x0f000000)
	85	(void)printf("pri 0x%02x, ", (flow & 0x0f000000) >> 24);
	86	if (flow & 0x00ffffff)
	87	(void)printf("flowlabel 0x%06x, ", flow & 0x00ffffff);
	88	#else
89	/* RFC 2460 */
90	if (flow & 0x0ff00000)
91	(void)printf("class 0x%02x, ", (flow & 0x0ff00000) >> 20);
92	if (flow & 0x000fffff)
93	(void)printf("flowlabel 0x%05x, ", flow & 0x000fffff);
94	#endif
95
825e8fa1	96	(void)printf("hlim %u, next-header %s (%u) payload length: %u) ",
c8cf0f94 PA	97	ip6->ip6_hlim,
	98	tok2str(ipproto_values,"unknown",ip6->ip6_nxt),
	99	ip6->ip6_nxt,
	100	payload_len);
	101	}
	102
	103	/*
	104	* Cut off the snapshot length to the end of the IP payload.
	105	*/
	106	ipend = bp + len;
	107	if (ipend < snapend)
	108	snapend = ipend;
	109
	110	cp = (const u_char *)ip6;
	111	advance = sizeof(struct ip6_hdr);
	112	nh = ip6->ip6_nxt;
	113	while (cp < snapend && advance > 0) {
	114	cp += advance;
	115	len -= advance;
	116
	117	if (cp == (const u_char *)(ip6 + 1) &&
	118	nh != IPPROTO_TCP && nh != IPPROTO_UDP &&
	119	nh != IPPROTO_DCCP && nh != IPPROTO_SCTP) {
	120	(void)printf("%s > %s: ", ip6addr_string(&ip6->ip6_src),
	121	ip6addr_string(&ip6->ip6_dst));
	122	}
	123
	124	switch (nh) {
	125	case IPPROTO_HOPOPTS:
	126	advance = hbhopt_print(cp);
	127	nh = *cp;
	128	break;
	129	case IPPROTO_DSTOPTS:
	130	advance = dstopt_print(cp);
	131	nh = *cp;
	132	break;
	133	case IPPROTO_FRAGMENT:
	134	advance = frag6_print(cp, (const u_char *)ip6);
	135	if (snapend <= cp + advance)
	136	return;
	137	nh = *cp;
	138	fragmented = 1;
	139	break;
	140
	141	case IPPROTO_MOBILITY_OLD:
	142	case IPPROTO_MOBILITY:
	143	/*
	144	* XXX - we don't use "advance"; the current
	145	* "Mobility Support in IPv6" draft
	146	* (draft-ietf-mobileip-ipv6-24) says that
	147	* the next header field in a mobility header
	148	* should be IPPROTO_NONE, but speaks of
	149	* the possiblity of a future extension in
	150	* which payload can be piggybacked atop a
	151	* mobility header.
	152	*/
	153	advance = mobility_print(cp, (const u_char *)ip6);
	154	nh = *cp;
	155	return;
	156	case IPPROTO_ROUTING:
	157	advance = rt6_print(cp, (const u_char *)ip6);
	158	nh = *cp;
	159	break;
	160	case IPPROTO_SCTP:
161	sctp_print(cp, (const u_char *)ip6, len);
162	return;
163	case IPPROTO_DCCP:
164	dccp_print(cp, (const u_char *)ip6, len);
165	return;
166	case IPPROTO_TCP:
167	tcp_print(cp, len, (const u_char *)ip6, fragmented);
168	return;
169	case IPPROTO_UDP:
170	udp_print(cp, len, (const u_char *)ip6, fragmented);
171	return;
172	case IPPROTO_ICMPV6:
173	icmp6_print(cp, len, (const u_char *)ip6, fragmented);
174	return;
175	case IPPROTO_AH:
176	advance = ah_print(cp);
177	nh = *cp;
178	break;
179	case IPPROTO_ESP:
180	{
181	int enh, padlen;
182	advance = esp_print(gndo, cp, len, (const u_char *)ip6, &enh, &padlen);
183	nh = enh & 0xff;
184	len -= padlen;
185	break;
186	}
187	case IPPROTO_IPCOMP:
188	{
189	int enh;
190	advance = ipcomp_print(cp, &enh);
191	nh = enh & 0xff;
192	break;
193	}
194
195	case IPPROTO_PIM:
196	pim_print(cp, len);
197	return;
198
199	case IPPROTO_OSPF:
200	ospf6_print(cp, len);
201	return;
202
203	case IPPROTO_IPV6:
204	ip6_print(cp, len);
205	return;
206
207	case IPPROTO_IPV4:
208	ip_print(gndo, cp, len);
209	return;
210
211	case IPPROTO_PGM:
212	pgm_print(cp, len, (const u_char *)ip6);
213	return;
214
215	case IPPROTO_GRE:
216	gre_print(cp, len);
217	return;
218
219	case IPPROTO_RSVP:
220	rsvp_print(cp, len);
221	return;
222
223	case IPPROTO_NONE:
224	(void)printf("no next header");
225	return;
226
227	default:
825e8fa1	228	(void)printf("ip-proto-%d %d", nh, len);
c8cf0f94 PA	229	return;
	230	}
	231	}
	232
	233	return;
	234	trunc:
	235	(void)printf("[\|ip6]");
	236	}
	237
	238	#endif /* INET6 */