print-ospf6.c

Windump3.6.2源代码

/*
 * Copyright (c) 1992, 1993, 1994, 1995, 1996, 1997
 *	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.
 *
 * OSPF support contributed by Jeffrey Honig ([e-mail])
 */

#ifndef lint
static const char rcsid[] =
    "@(#) $Header: /tcpdump/master/tcpdump/print-ospf6.c,v 1.6 2000/09/29 04:58:45 guy Exp $ (LBL)";
#endif

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifndef WIN32
#include <sys/param.h>
#include <sys/time.h>
#include <sys/socket.h>

#include <netinet/in.h>
#else
#include <winsock2.h>
#include <time.h>
#include "bittypes.h"
#endif

#include <ctype.h>
#include <stdio.h>
#include <string.h>

#include "interface.h"
#include "addrtoname.h"

#include "ospf6.h"

struct bits {
	u_int32_t bit;
	const char *str;
};

static const struct bits ospf6_option_bits[] = {
	{ OSPF6_OPTION_V6,	"V6" },
	{ OSPF6_OPTION_E,	"E" },
	{ OSPF6_OPTION_MC,	"MC" },
	{ OSPF6_OPTION_N,	"N" },
	{ OSPF6_OPTION_R,	"R" },
	{ OSPF6_OPTION_DC,	"DC" },
	{ 0,			NULL }
};

static const struct bits ospf6_rla_flag_bits[] = {
	{ RLA_FLAG_B,		"B" },
	{ RLA_FLAG_E,		"E" },
	{ RLA_FLAG_V,		"V" },
	{ RLA_FLAG_W,		"W" },
	{ 0,			NULL }
};

static const struct bits ospf6_asla_flag_bits[] = {
	{ ASLA_FLAG_EXTERNAL,	"E" },
	{ ASLA_FLAG_FWDADDR,	"F" },
	{ ASLA_FLAG_ROUTETAG,	"T" },
	{ 0,			NULL }
};

static struct tok type2str[] = {
	{ OSPF_TYPE_UMD,	"umd" },
	{ OSPF_TYPE_HELLO,	"hello" },
	{ OSPF_TYPE_DB,		"dd" },
	{ OSPF_TYPE_LSR,	"ls_req" },
	{ OSPF_TYPE_LSU,	"ls_upd" },
	{ OSPF_TYPE_LSA,	"ls_ack" },
	{ 0,			NULL }
};

static char tstr[] = " [|ospf]";

#ifdef WIN32
#define inline __inline
#endif /* WIN32 */

/* Forwards */
static inline void ospf6_print_seqage(u_int32_t, time_t);
static inline void ospf6_print_bits(const struct bits *, u_char);
static void ospf6_print_ls_type(u_int, const rtrid_t *,
    const rtrid_t *, const char *);
static int ospf6_print_lshdr(const struct lsa_hdr *);
static int ospf6_print_lsa(const struct lsa *);
static int ospf6_decode_v3(const struct ospf6hdr *, const u_char *);

static inline void
ospf6_print_seqage(register u_int32_t seq, register time_t us)
{
	register time_t sec = us % 60;
	register time_t mins = (us / 60) % 60;
	register time_t hour = us / 3600;

	printf(" S %X age ", seq);
	if (hour)
		printf("%u:%02u:%02u",
		    (u_int32_t) hour, (u_int32_t) mins, (u_int32_t) sec);
	else if (mins)
		printf("%u:%02u", (u_int32_t) mins, (u_int32_t) sec);
	else
		printf("%u", (u_int32_t) sec);
}


static inline void
ospf6_print_bits(register const struct bits *bp, register u_char options)
{
	register char sep = ' ';

	do {
		if (options & bp->bit) {
			printf("%c%s", sep, bp->str);
			sep = '/';
		}
	} while ((++bp)->bit);
}

static void
ospf6_print_ls_type(register u_int ls_type,
    register const rtrid_t *ls_stateid,
    register const rtrid_t *ls_router, register const char *fmt)
{
	char *scope;

	switch (ls_type & LS_SCOPE_MASK) {
	case LS_SCOPE_LINKLOCAL:
		scope = "linklocal-";
		break;
	case LS_SCOPE_AREA:
		scope = "area-";
		break;
	case LS_SCOPE_AS:
		scope = "AS-";
		break;
	default:
		scope = "";
		break;
	}

	switch (ls_type & LS_TYPE_MASK) {
	case LS_TYPE_ROUTER:
		printf(" %srtr %s", scope, ipaddr_string(ls_router));
		break;

	case LS_TYPE_NETWORK:
		printf(" %snet dr %s if %s", scope,
		    ipaddr_string(ls_router),
		    ipaddr_string(ls_stateid));
		break;

	case LS_TYPE_INTER_AP:
		printf(" %sinter-area-prefix %s abr %s", scope,
		    ipaddr_string(ls_stateid),
		    ipaddr_string(ls_router));
		break;

	case LS_TYPE_INTER_AR:
		printf(" %sinter-area-router %s rtr %s", scope,
		    ipaddr_string(ls_router),
		    ipaddr_string(ls_stateid));
		break;

	case LS_TYPE_ASE:
		printf(" %sase %s asbr %s", scope,
		    ipaddr_string(ls_stateid),
		    ipaddr_string(ls_router));
		break;

	case LS_TYPE_GROUP:
		printf(" %sgroup %s rtr %s", scope,
		    ipaddr_string(ls_stateid),
		    ipaddr_string(ls_router));
		break;

	case LS_TYPE_TYPE7:
		printf(" %stype7 %s rtr %s", scope,
		    ipaddr_string(ls_stateid),
		    ipaddr_string(ls_router));
		break;

	case LS_TYPE_LINK:
		printf(" %slink %s rtr %s", scope,
		    ipaddr_string(ls_stateid),
		    ipaddr_string(ls_router));
		break;

	case LS_TYPE_INTRA_AP:
		printf(" %sintra-area-prefix %s rtr %s", scope,
		    ipaddr_string(ls_stateid),
		    ipaddr_string(ls_router));
		break;

	default:
		printf(" %s", scope);
		printf(fmt, ls_type);
		break;
	}

}

static int
ospf6_print_lshdr(register const struct lsa_hdr *lshp)
{

	TCHECK(lshp->ls_type);
	printf(" {");						/* } (ctags) */

	TCHECK(lshp->ls_seq);
	ospf6_print_seqage(ntohl(lshp->ls_seq), ntohs(lshp->ls_age));
	ospf6_print_ls_type(ntohs(lshp->ls_type), &lshp->ls_stateid,
		&lshp->ls_router, "ls_type %d");

	return (0);
trunc:
	return (1);
}

static int
ospf6_print_lsaprefix(register const struct lsa_prefix *lsapp)
{
	int k;
	struct in6_addr prefix;

	TCHECK(*lsapp);
	k = (lsapp->lsa_p_len + 31) / 32;
	if (k * 4 > sizeof(struct in6_addr)) {
		printf("??prefixlen %d??", lsapp->lsa_p_len);
		goto trunc;
	}
	memset(&prefix, 0, sizeof(prefix));
	memcpy(&prefix, lsapp->lsa_p_prefix, k * 4);
	printf(" %s/%d", ip6addr_string(&prefix), 
		lsapp->lsa_p_len);
	if (lsapp->lsa_p_opt)
		printf("(opt=%x)", lsapp->lsa_p_opt);
	if (lsapp->lsa_p_mbz)
		printf("(mbz=%x)", ntohs(lsapp->lsa_p_mbz)); /* XXX */
	return sizeof(*lsapp) - 4 + k * 4;

trunc:
	return -1;
}


/*
 * Print a single link state advertisement.  If truncated return 1, else 0.
 */
static int
ospf6_print_lsa(register const struct lsa *lsap)
{
	register const u_char *ls_end, *ls_opt;
	register const struct rlalink *rlp;
#if 0
	register const struct tos_metric *tosp;
#endif
	register const rtrid_t *ap;
#if 0
	register const struct aslametric *almp;
	register const struct mcla *mcp;
#endif
	register const struct llsa *llsap;
	register const struct lsa_prefix *lsapp;
#if 0
	register const u_int32_t *lp;
#endif
	register int j, k;
	u_int32_t flags32;

	if (ospf6_print_lshdr(&lsap->ls_hdr))
		return (1);
	TCHECK(lsap->ls_hdr.ls_length);
	ls_end = (u_char *)lsap + ntohs(lsap->ls_hdr.ls_length);
	switch (ntohs(lsap->ls_hdr.ls_type)) {
	case LS_TYPE_ROUTER | LS_SCOPE_AREA:
		TCHECK(lsap->lsa_un.un_rla.rla_flags);
		ospf6_print_bits(ospf6_rla_flag_bits,
			lsap->lsa_un.un_rla.rla_flags);
		TCHECK(lsap->lsa_un.un_rla.rla_options);
		ospf6_print_bits(ospf6_option_bits,
			ntohl(lsap->lsa_un.un_rla.rla_options));

		TCHECK(lsap->lsa_un.un_rla.rla_link);
		rlp = lsap->lsa_un.un_rla.rla_link;
		while (rlp + sizeof(*rlp) <= (struct rlalink *)ls_end) {
			TCHECK(*rlp);
			printf(" {");				/* } (ctags) */
			switch (rlp->link_type) {

			case RLA_TYPE_VIRTUAL:
				printf(" virt");
				/* Fall through */

			case RLA_TYPE_ROUTER:
				printf(" nbrid %s nbrif %s if %s",
				    ipaddr_string(&rlp->link_nrtid),
				    ipaddr_string(&rlp->link_nifid),
				    ipaddr_string(&rlp->link_ifid));
				break;

			case RLA_TYPE_TRANSIT:
				printf(" dr %s drif %s if %s",
				    ipaddr_string(&rlp->link_nrtid),
				    ipaddr_string(&rlp->link_nifid),
				    ipaddr_string(&rlp->link_ifid));
				break;

			default:
								/* { (ctags) */
				printf(" ??RouterLinksType 0x%02x?? }",
				    rlp->link_type);
				return (0);
			}
			printf(" metric %d", ntohs(rlp->link_metric));
								/* { (ctags) */
			printf(" }");
			rlp++;
		}
		break;

	case LS_TYPE_NETWORK | LS_SCOPE_AREA:
		TCHECK(lsap->lsa_un.un_nla.nla_options);
		ospf6_print_bits(ospf6_option_bits,
			ntohl(lsap->lsa_un.un_nla.nla_options));
		printf(" rtrs");
		ap = lsap->lsa_un.un_nla.nla_router;
		while ((u_char *)ap < ls_end) {