print-ospf6.c

Windump3.6.2源代码

			TCHECK(*ap);
			printf(" %s", ipaddr_string(ap));
			++ap;
		}
		break;

	case LS_TYPE_INTER_AP | LS_SCOPE_AREA:
		TCHECK(lsap->lsa_un.un_inter_ap.inter_ap_metric);
		printf(" metric %u",
			(u_int32_t)ntohl(lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC);
		lsapp = lsap->lsa_un.un_inter_ap.inter_ap_prefix;
		while (lsapp + sizeof(lsapp) <= (struct lsa_prefix *)ls_end) {
			k = ospf6_print_lsaprefix(lsapp);
			if (k)
				goto trunc;
			lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k);
		}
		break;
	case LS_SCOPE_AS | LS_TYPE_ASE:
		TCHECK(lsap->lsa_un.un_asla.asla_metric);
		flags32 = ntohl(lsap->lsa_un.un_asla.asla_metric);
		ospf6_print_bits(ospf6_asla_flag_bits, flags32);
		printf(" metric %u",
		       ntohl(lsap->lsa_un.un_asla.asla_metric) &
		       ASLA_MASK_METRIC);
		lsapp = lsap->lsa_un.un_asla.asla_prefix;
		k = ospf6_print_lsaprefix(lsapp);
		if (k < 0)
			goto trunc;
		if ((ls_opt = (u_char *)(((u_char *)lsapp) + k)) < ls_end) {
			struct in6_addr *fwdaddr6;

			if ((flags32 & ASLA_FLAG_FWDADDR) != 0) {
				fwdaddr6 = (struct in6_addr *)ls_opt;
				TCHECK(*fwdaddr6);
				printf(" forward %s",
				       ip6addr_string(fwdaddr6));

				ls_opt += sizeof(struct in6_addr);
			}

			if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) {
				TCHECK(*(u_int32_t *)ls_opt);
				printf(" tag %s", 
				       ipaddr_string((u_int32_t *)ls_opt));

				ls_opt += sizeof(u_int32_t);
			}

			if (lsapp->lsa_p_mbz) {
				TCHECK(*(u_int32_t *)ls_opt);
				printf(" RefLSID: %s",
				       ipaddr_string((u_int32_t *)ls_opt));

				ls_opt += sizeof(u_int32_t);
			}
		}
		break;
#if 0
	case LS_TYPE_SUM_ABR:
		TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
		lp = lsap->lsa_un.un_sla.sla_tosmetric;
		while ((u_char *)lp < ls_end) {
			register u_int32_t ul;

			TCHECK(*lp);
			ul = ntohl(*lp);
			printf(" tos %d metric %d",
			    (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS,
			    ul & SLA_MASK_METRIC);
			++lp;
		}
		break;

	case LS_TYPE_GROUP:
		/* Multicast extensions as of 23 July 1991 */
		mcp = lsap->lsa_un.un_mcla;
		while ((u_char *)mcp < ls_end) {
			TCHECK(mcp->mcla_vid);
			switch (ntohl(mcp->mcla_vtype)) {

			case MCLA_VERTEX_ROUTER:
				printf(" rtr rtrid %s",
				    ipaddr_string(&mcp->mcla_vid));
				break;

			case MCLA_VERTEX_NETWORK:
				printf(" net dr %s",
				    ipaddr_string(&mcp->mcla_vid));
				break;

			default:
				printf(" ??VertexType %u??",
				    (u_int32_t)ntohl(mcp->mcla_vtype));
				break;
			}
		++mcp;
		}
#endif

	case LS_TYPE_LINK:
		/* Link LSA */
		llsap = &lsap->lsa_un.un_llsa;
		TCHECK(llsap->llsa_options);
		ospf6_print_bits(ospf6_option_bits, ntohl(llsap->llsa_options));
		TCHECK(llsap->llsa_nprefix);
		printf(" pri %d lladdr %s npref %d", llsap->llsa_priority,
			ip6addr_string(&llsap->llsa_lladdr),
			(u_int32_t)ntohl(llsap->llsa_nprefix));
		lsapp = llsap->llsa_prefix;
		for (j = 0; j < ntohl(llsap->llsa_nprefix); j++) {
			k = ospf6_print_lsaprefix(lsapp);
			if (k)
				goto trunc;
			lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k);
		}
		break;

	case LS_TYPE_INTRA_AP | LS_SCOPE_AREA:
		/* Intra-Area-Prefix LSA */
		TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_rtid);
		ospf6_print_ls_type(
			ntohs(lsap->lsa_un.un_intra_ap.intra_ap_lstype),
			&lsap->lsa_un.un_intra_ap.intra_ap_lsid,
			&lsap->lsa_un.un_intra_ap.intra_ap_rtid,
			"LinkStateType %d");
		TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
		printf(" npref %d",
			ntohs(lsap->lsa_un.un_intra_ap.intra_ap_nprefix));

		lsapp = lsap->lsa_un.un_intra_ap.intra_ap_prefix;
		for (j = 0;
		     j < ntohs(lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
		     j++) {
			k = ospf6_print_lsaprefix(lsapp);
			if (k)
				goto trunc;
			lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k);
		}
		break;

	default:
		printf(" ??LinkStateType 0x%04x??",
			ntohs(lsap->ls_hdr.ls_type));
	}

								/* { (ctags) */
	fputs(" }", stdout);
	return (0);
trunc:
	fputs(" }", stdout);
	return (1);
}

static int
ospf6_decode_v3(register const struct ospf6hdr *op,
    register const u_char *dataend)
{
	register const rtrid_t *ap;
	register const struct lsr *lsrp;
	register const struct lsa_hdr *lshp;
	register const struct lsa *lsap;
	register char sep;
	register int i;

	switch (op->ospf6_type) {

	case OSPF_TYPE_UMD:
		/*
		 * Rob Coltun's special monitoring packets;
		 * do nothing
		 */
		break;

	case OSPF_TYPE_HELLO:
		if (vflag) {
			TCHECK(op->ospf6_hello.hello_deadint);
			ospf6_print_bits(ospf6_option_bits,
			    ntohl(op->ospf6_hello.hello_options));
			printf(" ifid %s pri %d int %d dead %u",
			    ipaddr_string(&op->ospf6_hello.hello_ifid),
			    op->ospf6_hello.hello_priority,
			    ntohs(op->ospf6_hello.hello_helloint),
			    ntohs(op->ospf6_hello.hello_deadint));
		}
		TCHECK(op->ospf6_hello.hello_dr);
		if (op->ospf6_hello.hello_dr != 0)
			printf(" dr %s",
			    ipaddr_string(&op->ospf6_hello.hello_dr));
		TCHECK(op->ospf6_hello.hello_bdr);
		if (op->ospf6_hello.hello_bdr != 0)
			printf(" bdr %s",
			    ipaddr_string(&op->ospf6_hello.hello_bdr));
		if (vflag) {
			printf(" nbrs");
			ap = op->ospf6_hello.hello_neighbor;
			while ((u_char *)ap < dataend) {
				TCHECK(*ap);
				printf(" %s", ipaddr_string(ap));
				++ap;
			}
		}
		break;	/* HELLO */

	case OSPF_TYPE_DB:
		TCHECK(op->ospf6_db.db_options);
		ospf6_print_bits(ospf6_option_bits,
			ntohl(op->ospf6_db.db_options));
		sep = ' ';
		TCHECK(op->ospf6_db.db_flags);
		if (op->ospf6_db.db_flags & OSPF6_DB_INIT) {
			printf("%cI", sep);
			sep = '/';
		}
		if (op->ospf6_db.db_flags & OSPF6_DB_MORE) {
			printf("%cM", sep);
			sep = '/';
		}
		if (op->ospf6_db.db_flags & OSPF6_DB_MASTER) {
			printf("%cMS", sep);
			sep = '/';
		}
		TCHECK(op->ospf6_db.db_seq);
		printf(" mtu %u S %X", ntohs(op->ospf6_db.db_mtu),
			(u_int32_t)ntohl(op->ospf6_db.db_seq));

		if (vflag) {
			/* Print all the LS adv's */
			lshp = op->ospf6_db.db_lshdr;

			while (!ospf6_print_lshdr(lshp)) {
							/* { (ctags) */
				printf(" }");
				++lshp;
			}
		}
		break;

	case OSPF_TYPE_LSR:
		if (vflag) {
			lsrp = op->ospf6_lsr;
			while ((u_char *)lsrp < dataend) {
				TCHECK(*lsrp);
				printf(" {");		/* } (ctags) */
				ospf6_print_ls_type(ntohs(lsrp->ls_type),
				    &lsrp->ls_stateid,
				    &lsrp->ls_router,
				    "LinkStateType %d");
							/* { (ctags) */
				printf(" }");
				++lsrp;
			}
		}
		break;

	case OSPF_TYPE_LSU:
		if (vflag) {
			lsap = op->ospf6_lsu.lsu_lsa;
			TCHECK(op->ospf6_lsu.lsu_count);
			i = ntohl(op->ospf6_lsu.lsu_count);
			while (i--) {
				if (ospf6_print_lsa(lsap))
					goto trunc;
				lsap = (struct lsa *)((u_char *)lsap +
				    ntohs(lsap->ls_hdr.ls_length));
			}
		}
		break;


	case OSPF_TYPE_LSA:
		if (vflag) {
			lshp = op->ospf6_lsa.lsa_lshdr;

			while (!ospf6_print_lshdr(lshp)) {
							/* { (ctags) */
				printf(" }");
				++lshp;
			}
		}
		break;

	default:
		printf("v3 type %d", op->ospf6_type);
		break;
	}
	return (0);
trunc:
	return (1);
}

void
ospf6_print(register const u_char *bp, register u_int length)
{
	register const struct ospf6hdr *op;
	register const u_char *dataend;
	register const char *cp;

	op = (struct ospf6hdr *)bp;

	/* If the type is valid translate it, or just print the type */
	/* value.  If it's not valid, say so and return */
	TCHECK(op->ospf6_type);
	cp = tok2str(type2str, "type%d", op->ospf6_type);
	printf("OSPFv%d-%s %d:", op->ospf6_version, cp, length);
	if (*cp == 't')
		return;

	TCHECK(op->ospf6_len);
	if (length != ntohs(op->ospf6_len)) {
		printf(" [len %d]", ntohs(op->ospf6_len));
		return;
	}
	dataend = bp + length;

	/* Print the routerid if it is not the same as the source */
	TCHECK(op->ospf6_routerid);
	printf(" rtrid %s", ipaddr_string(&op->ospf6_routerid));

	TCHECK(op->ospf6_areaid);
	if (op->ospf6_areaid != 0)
		printf(" area %s", ipaddr_string(&op->ospf6_areaid));
	else
		printf(" backbone");
	TCHECK(op->ospf6_instanceid);
	if (op->ospf6_instanceid)
		printf(" instance %u", op->ospf6_instanceid);

	/* Do rest according to version.	 */
	switch (op->ospf6_version) {

	case 3:
		/* ospf version 3 */
		if (ospf6_decode_v3(op, dataend))
			goto trunc;
		break;

	default:
		printf(" ospf [version %d]", op->ospf6_version);
		break;
	}			/* end switch on version */

	return;
trunc:
	fputs(tstr, stdout);
}