590 lines
18 KiB
C
590 lines
18 KiB
C
/*
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* Copyright (c) 1992, 1993, 1994, 1995, 1996, 1997
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu)
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*/
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#ifndef lint
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static const char rcsid[] _U_ =
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"@(#) $Header: /tcpdump/master/tcpdump/print-ospf6.c,v 1.15 2006-09-13 06:31:11 guy Exp $ (LBL)";
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#endif
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#include <stdio.h>
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#include <string.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "extract.h"
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#include "ospf.h"
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#include "ospf6.h"
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static const struct tok ospf6_option_values[] = {
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{ OSPF6_OPTION_V6, "V6" },
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{ OSPF6_OPTION_E, "External" },
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{ OSPF6_OPTION_MC, "Multicast" },
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{ OSPF6_OPTION_N, "NSSA" },
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{ OSPF6_OPTION_R, "Router" },
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{ OSPF6_OPTION_DC, "Demand Circuit" },
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{ 0, NULL }
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};
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static const struct tok ospf6_rla_flag_values[] = {
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{ RLA_FLAG_B, "ABR" },
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{ RLA_FLAG_E, "External" },
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{ RLA_FLAG_V, "Virtual-Link Endpoint" },
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{ RLA_FLAG_W, "Wildcard Receiver" },
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{ RLA_FLAG_N, "NSSA Translator" },
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{ 0, NULL }
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};
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static const struct tok ospf6_asla_flag_values[] = {
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{ ASLA_FLAG_EXTERNAL, "External Type 2" },
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{ ASLA_FLAG_FWDADDR, "Fforwarding" },
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{ ASLA_FLAG_ROUTETAG, "Tag" },
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{ 0, NULL }
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};
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static struct tok ospf6_type_values[] = {
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{ OSPF_TYPE_HELLO, "Hello" },
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{ OSPF_TYPE_DD, "Database Description" },
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{ OSPF_TYPE_LS_REQ, "LS-Request" },
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{ OSPF_TYPE_LS_UPDATE, "LS-Update" },
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{ OSPF_TYPE_LS_ACK, "LS-Ack" },
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{ 0, NULL }
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};
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static struct tok ospf6_lsa_values[] = {
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{ LS_TYPE_ROUTER, "Router" },
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{ LS_TYPE_NETWORK, "Network" },
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{ LS_TYPE_INTER_AP, "Inter-Area Prefix" },
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{ LS_TYPE_INTER_AR, "Inter-Area Router" },
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{ LS_TYPE_ASE, "External" },
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{ LS_TYPE_GROUP, "Multicast Group" },
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{ LS_TYPE_NSSA, "NSSA" },
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{ LS_TYPE_LINK, "Link" },
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{ LS_TYPE_INTRA_AP, "Intra-Area Prefix" },
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{ LS_TYPE_INTRA_ATE, "Intra-Area TE" },
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{ LS_TYPE_GRACE, "Grace" },
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{ 0, NULL }
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};
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static struct tok ospf6_ls_scope_values[] = {
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{ LS_SCOPE_LINKLOCAL, "Link Local" },
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{ LS_SCOPE_AREA, "Area Local" },
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{ LS_SCOPE_AS, "Domain Wide" },
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{ 0, NULL }
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};
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static struct tok ospf6_dd_flag_values[] = {
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{ OSPF6_DB_INIT, "Init" },
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{ OSPF6_DB_MORE, "More" },
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{ OSPF6_DB_MASTER, "Master" },
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{ 0, NULL }
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};
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static struct tok ospf6_lsa_prefix_option_values[] = {
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{ LSA_PREFIX_OPT_NU, "No Unicast" },
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{ LSA_PREFIX_OPT_LA, "Local address" },
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{ LSA_PREFIX_OPT_MC, "Multicast" },
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{ LSA_PREFIX_OPT_P, "Propagate" },
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{ LSA_PREFIX_OPT_DN, "Down" },
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{ 0, NULL }
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};
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static char tstr[] = " [|ospf3]";
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#ifdef WIN32
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#define inline __inline
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#endif /* WIN32 */
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/* Forwards */
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static void ospf6_print_ls_type(u_int, const rtrid_t *);
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static int ospf6_print_lshdr(const struct lsa6_hdr *);
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static int ospf6_print_lsa(const struct lsa6 *);
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static int ospf6_decode_v3(const struct ospf6hdr *, const u_char *);
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static void
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ospf6_print_ls_type(register u_int ls_type, register const rtrid_t *ls_stateid)
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{
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printf("\n\t %s LSA (%d), %s Scope%s, LSA-ID %s",
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tok2str(ospf6_lsa_values, "Unknown", ls_type & LS_TYPE_MASK),
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ls_type & LS_TYPE_MASK,
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tok2str(ospf6_ls_scope_values, "Unknown", ls_type & LS_SCOPE_MASK),
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ls_type &0x8000 ? ", transitive" : "", /* U-bit */
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ipaddr_string(ls_stateid));
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}
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static int
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ospf6_print_lshdr(register const struct lsa6_hdr *lshp)
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{
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TCHECK(lshp->ls_type);
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TCHECK(lshp->ls_seq);
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printf("\n\t Advertising Router %s, seq 0x%08x, age %us, length %u",
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ipaddr_string(&lshp->ls_router),
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EXTRACT_32BITS(&lshp->ls_seq),
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EXTRACT_16BITS(&lshp->ls_age),
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EXTRACT_16BITS(&lshp->ls_length)-(u_int)sizeof(struct lsa6_hdr));
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ospf6_print_ls_type(EXTRACT_16BITS(&lshp->ls_type), &lshp->ls_stateid);
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return (0);
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trunc:
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return (1);
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}
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static int
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ospf6_print_lsaprefix(register const struct lsa6_prefix *lsapp)
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{
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u_int wordlen;
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struct in6_addr prefix;
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TCHECK(*lsapp);
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wordlen = (lsapp->lsa_p_len + 31) / 32;
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if (wordlen * 4 > sizeof(struct in6_addr)) {
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printf(" bogus prefixlen /%d", lsapp->lsa_p_len);
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goto trunc;
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}
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memset(&prefix, 0, sizeof(prefix));
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memcpy(&prefix, lsapp->lsa_p_prefix, wordlen * 4);
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printf("\n\t\t%s/%d", ip6addr_string(&prefix),
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lsapp->lsa_p_len);
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if (lsapp->lsa_p_opt) {
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printf(", Options [%s]",
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bittok2str(ospf6_lsa_prefix_option_values,
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"none", lsapp->lsa_p_opt));
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}
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printf(", metric %u", EXTRACT_16BITS(&lsapp->lsa_p_metric));
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return sizeof(*lsapp) - 4 + wordlen * 4;
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trunc:
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return -1;
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}
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/*
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* Print a single link state advertisement. If truncated return 1, else 0.
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*/
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static int
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ospf6_print_lsa(register const struct lsa6 *lsap)
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{
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register const u_char *ls_end, *ls_opt;
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register const struct rlalink6 *rlp;
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#if 0
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register const struct tos_metric *tosp;
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#endif
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register const rtrid_t *ap;
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#if 0
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register const struct aslametric *almp;
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register const struct mcla *mcp;
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#endif
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register const struct llsa *llsap;
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register const struct lsa6_prefix *lsapp;
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#if 0
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register const u_int32_t *lp;
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#endif
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register u_int prefixes;
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register int bytelen, length, lsa_length;
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u_int32_t flags32;
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u_int8_t *tptr;
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if (ospf6_print_lshdr(&lsap->ls_hdr))
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return (1);
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TCHECK(lsap->ls_hdr.ls_length);
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length = EXTRACT_16BITS(&lsap->ls_hdr.ls_length);
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lsa_length = length - sizeof(struct lsa6_hdr);
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ls_end = (u_char *)lsap + length;
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tptr = (u_int8_t *)lsap+sizeof(struct lsa6_hdr);
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switch (EXTRACT_16BITS(&lsap->ls_hdr.ls_type)) {
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case LS_TYPE_ROUTER | LS_SCOPE_AREA:
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TCHECK(lsap->lsa_un.un_rla.rla_options);
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printf("\n\t Options [%s]",
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bittok2str(ospf6_option_values, "none",
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EXTRACT_32BITS(&lsap->lsa_un.un_rla.rla_options)));
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TCHECK(lsap->lsa_un.un_rla.rla_flags);
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printf(", RLA-Flags [%s]",
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bittok2str(ospf6_rla_flag_values, "none",
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lsap->lsa_un.un_rla.rla_flags));
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TCHECK(lsap->lsa_un.un_rla.rla_link);
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rlp = lsap->lsa_un.un_rla.rla_link;
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while (rlp + 1 <= (struct rlalink6 *)ls_end) {
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TCHECK(*rlp);
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switch (rlp->link_type) {
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case RLA_TYPE_VIRTUAL:
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printf("\n\t Virtual Link: Neighbor Router-ID %s"
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"\n\t Neighbor Interface-ID %s, Interface %s",
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ipaddr_string(&rlp->link_nrtid),
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ipaddr_string(&rlp->link_nifid),
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ipaddr_string(&rlp->link_ifid));
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break;
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case RLA_TYPE_ROUTER:
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printf("\n\t Neighbor Router-ID %s"
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"\n\t Neighbor Interface-ID %s, Interface %s",
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ipaddr_string(&rlp->link_nrtid),
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ipaddr_string(&rlp->link_nifid),
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ipaddr_string(&rlp->link_ifid));
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break;
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case RLA_TYPE_TRANSIT:
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printf("\n\t Neighbor Network-ID %s"
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"\n\t Neighbor Interface-ID %s, Interface %s",
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ipaddr_string(&rlp->link_nrtid),
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ipaddr_string(&rlp->link_nifid),
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ipaddr_string(&rlp->link_ifid));
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break;
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default:
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printf("\n\t Unknown Router Links Type 0x%02x",
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rlp->link_type);
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return (0);
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}
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printf(", metric %d", EXTRACT_16BITS(&rlp->link_metric));
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rlp++;
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}
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break;
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case LS_TYPE_NETWORK | LS_SCOPE_AREA:
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TCHECK(lsap->lsa_un.un_nla.nla_options);
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printf("\n\t Options [%s]",
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bittok2str(ospf6_option_values, "none",
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EXTRACT_32BITS(&lsap->lsa_un.un_nla.nla_options)));
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printf("\n\t Connected Routers:");
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ap = lsap->lsa_un.un_nla.nla_router;
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while ((u_char *)ap < ls_end) {
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TCHECK(*ap);
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printf("\n\t\t%s", ipaddr_string(ap));
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++ap;
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}
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break;
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case LS_TYPE_INTER_AP | LS_SCOPE_AREA:
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TCHECK(lsap->lsa_un.un_inter_ap.inter_ap_metric);
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printf(", metric %u",
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EXTRACT_32BITS(&lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC);
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lsapp = lsap->lsa_un.un_inter_ap.inter_ap_prefix;
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while (lsapp + sizeof(lsapp) <= (struct lsa6_prefix *)ls_end) {
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bytelen = ospf6_print_lsaprefix(lsapp);
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if (bytelen)
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goto trunc;
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lsapp = (struct lsa6_prefix *)(((u_char *)lsapp) + bytelen);
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}
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break;
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case LS_SCOPE_AS | LS_TYPE_ASE:
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TCHECK(lsap->lsa_un.un_asla.asla_metric);
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flags32 = EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric);
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printf("\n\t Flags [%s]",
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bittok2str(ospf6_asla_flag_values, "none", flags32));
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printf(" metric %u",
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EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric) &
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ASLA_MASK_METRIC);
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lsapp = lsap->lsa_un.un_asla.asla_prefix;
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bytelen = ospf6_print_lsaprefix(lsapp);
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if (bytelen < 0)
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goto trunc;
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if ((ls_opt = (u_char *)(((u_char *)lsapp) + bytelen)) < ls_end) {
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struct in6_addr *fwdaddr6;
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if ((flags32 & ASLA_FLAG_FWDADDR) != 0) {
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fwdaddr6 = (struct in6_addr *)ls_opt;
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TCHECK(*fwdaddr6);
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printf(" forward %s",
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ip6addr_string(fwdaddr6));
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ls_opt += sizeof(struct in6_addr);
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}
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if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) {
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TCHECK(*(u_int32_t *)ls_opt);
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printf(" tag %s",
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ipaddr_string((u_int32_t *)ls_opt));
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ls_opt += sizeof(u_int32_t);
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}
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if (lsapp->lsa_p_metric) {
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TCHECK(*(u_int32_t *)ls_opt);
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printf(" RefLSID: %s",
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ipaddr_string((u_int32_t *)ls_opt));
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ls_opt += sizeof(u_int32_t);
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}
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}
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break;
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case LS_TYPE_LINK:
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/* Link LSA */
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llsap = &lsap->lsa_un.un_llsa;
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TCHECK(llsap->llsa_options);
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printf("\n\t Options [%s]",
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bittok2str(ospf6_option_values, "none",
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EXTRACT_32BITS(&llsap->llsa_options)));
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TCHECK(llsap->llsa_nprefix);
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prefixes = EXTRACT_32BITS(&llsap->llsa_nprefix);
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printf("\n\t Priority %d, Link-local address %s, Prefixes %d:",
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llsap->llsa_priority,
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ip6addr_string(&llsap->llsa_lladdr),
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prefixes);
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tptr = (u_int8_t *)llsap->llsa_prefix;
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while (prefixes > 0) {
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lsapp = (struct lsa6_prefix *)tptr;
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if ((bytelen = ospf6_print_lsaprefix(lsapp)) == -1) {
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goto trunc;
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}
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prefixes--;
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tptr += bytelen;
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}
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break;
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case LS_TYPE_INTRA_AP | LS_SCOPE_AREA:
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/* Intra-Area-Prefix LSA */
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TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_rtid);
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ospf6_print_ls_type(
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EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_lstype),
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&lsap->lsa_un.un_intra_ap.intra_ap_lsid);
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TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
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prefixes = EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
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printf("\n\t Prefixes %d:", prefixes);
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tptr = (u_int8_t *)lsap->lsa_un.un_intra_ap.intra_ap_prefix;
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while (prefixes > 0) {
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lsapp = (struct lsa6_prefix *)tptr;
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if ((bytelen = ospf6_print_lsaprefix(lsapp)) == -1) {
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goto trunc;
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}
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prefixes--;
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tptr += bytelen;
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}
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break;
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case LS_TYPE_GRACE | LS_SCOPE_LINKLOCAL:
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if (ospf_print_grace_lsa(tptr, lsa_length) == -1) {
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return 1;
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}
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break;
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case LS_TYPE_INTRA_ATE | LS_SCOPE_LINKLOCAL:
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if (ospf_print_te_lsa(tptr, lsa_length) == -1) {
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return 1;
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}
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break;
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default:
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if(!print_unknown_data(tptr,
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"\n\t ",
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lsa_length)) {
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return (1);
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}
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}
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return (0);
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trunc:
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return (1);
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}
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static int
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ospf6_decode_v3(register const struct ospf6hdr *op,
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register const u_char *dataend)
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{
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register const rtrid_t *ap;
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register const struct lsr6 *lsrp;
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register const struct lsa6_hdr *lshp;
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register const struct lsa6 *lsap;
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register int i;
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switch (op->ospf6_type) {
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case OSPF_TYPE_HELLO:
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printf("\n\tOptions [%s]",
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bittok2str(ospf6_option_values, "none",
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EXTRACT_32BITS(&op->ospf6_hello.hello_options)));
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TCHECK(op->ospf6_hello.hello_deadint);
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printf("\n\t Hello Timer %us, Dead Timer %us, Interface-ID %s, Priority %u",
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EXTRACT_16BITS(&op->ospf6_hello.hello_helloint),
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EXTRACT_16BITS(&op->ospf6_hello.hello_deadint),
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ipaddr_string(&op->ospf6_hello.hello_ifid),
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op->ospf6_hello.hello_priority);
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TCHECK(op->ospf6_hello.hello_dr);
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if (op->ospf6_hello.hello_dr != 0)
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printf("\n\t Designated Router %s",
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ipaddr_string(&op->ospf6_hello.hello_dr));
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TCHECK(op->ospf6_hello.hello_bdr);
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if (op->ospf6_hello.hello_bdr != 0)
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printf(", Backup Designated Router %s",
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ipaddr_string(&op->ospf6_hello.hello_bdr));
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if (vflag) {
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printf("\n\t Neighbor List:");
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ap = op->ospf6_hello.hello_neighbor;
|
|
while ((u_char *)ap < dataend) {
|
|
TCHECK(*ap);
|
|
printf("\n\t %s", ipaddr_string(ap));
|
|
++ap;
|
|
}
|
|
}
|
|
break; /* HELLO */
|
|
|
|
case OSPF_TYPE_DD:
|
|
TCHECK(op->ospf6_db.db_options);
|
|
printf("\n\tOptions [%s]",
|
|
bittok2str(ospf6_option_values, "none",
|
|
EXTRACT_32BITS(&op->ospf6_db.db_options)));
|
|
TCHECK(op->ospf6_db.db_flags);
|
|
printf(", DD Flags [%s]",
|
|
bittok2str(ospf6_dd_flag_values,"none",op->ospf6_db.db_flags));
|
|
|
|
TCHECK(op->ospf6_db.db_seq);
|
|
printf(", MTU %u, DD-Sequence 0x%08x",
|
|
EXTRACT_16BITS(&op->ospf6_db.db_mtu),
|
|
EXTRACT_32BITS(&op->ospf6_db.db_seq));
|
|
|
|
/* Print all the LS adv's */
|
|
lshp = op->ospf6_db.db_lshdr;
|
|
while (!ospf6_print_lshdr(lshp)) {
|
|
++lshp;
|
|
}
|
|
break;
|
|
|
|
case OSPF_TYPE_LS_REQ:
|
|
if (vflag) {
|
|
lsrp = op->ospf6_lsr;
|
|
while ((u_char *)lsrp < dataend) {
|
|
TCHECK(*lsrp);
|
|
printf("\n\t Advertising Router %s",
|
|
ipaddr_string(&lsrp->ls_router));
|
|
ospf6_print_ls_type(EXTRACT_16BITS(&lsrp->ls_type),
|
|
&lsrp->ls_stateid);
|
|
++lsrp;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case OSPF_TYPE_LS_UPDATE:
|
|
if (vflag) {
|
|
lsap = op->ospf6_lsu.lsu_lsa;
|
|
TCHECK(op->ospf6_lsu.lsu_count);
|
|
i = EXTRACT_32BITS(&op->ospf6_lsu.lsu_count);
|
|
while (i--) {
|
|
if (ospf6_print_lsa(lsap))
|
|
goto trunc;
|
|
lsap = (struct lsa6 *)((u_char *)lsap +
|
|
EXTRACT_16BITS(&lsap->ls_hdr.ls_length));
|
|
}
|
|
}
|
|
break;
|
|
|
|
|
|
case OSPF_TYPE_LS_ACK:
|
|
if (vflag) {
|
|
lshp = op->ospf6_lsa.lsa_lshdr;
|
|
|
|
while (!ospf6_print_lshdr(lshp)) {
|
|
++lshp;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
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(ospf6_type_values, "unknown LS-type", op->ospf6_type);
|
|
printf("OSPFv%u, %s, length %d", op->ospf6_version, cp, length);
|
|
if (*cp == 'u') {
|
|
return;
|
|
}
|
|
|
|
if(!vflag) { /* non verbose - so lets bail out here */
|
|
return;
|
|
}
|
|
|
|
TCHECK(op->ospf6_len);
|
|
if (length != EXTRACT_16BITS(&op->ospf6_len)) {
|
|
printf(" [len %d]", EXTRACT_16BITS(&op->ospf6_len));
|
|
return;
|
|
}
|
|
dataend = bp + length;
|
|
|
|
/* Print the routerid if it is not the same as the source */
|
|
TCHECK(op->ospf6_routerid);
|
|
printf("\n\tRouter-ID %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 Area");
|
|
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);
|
|
}
|