685 lines
16 KiB
C
685 lines
16 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[] =
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"@(#) $Header: /tcpdump/master/tcpdump/print-ospf6.c,v 1.6 2000/09/29 04:58:45 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 <sys/param.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <ctype.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 "ospf6.h"
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struct bits {
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u_int32_t bit;
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const char *str;
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};
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static const struct bits ospf6_option_bits[] = {
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{ OSPF6_OPTION_V6, "V6" },
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{ OSPF6_OPTION_E, "E" },
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{ OSPF6_OPTION_MC, "MC" },
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{ OSPF6_OPTION_N, "N" },
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{ OSPF6_OPTION_R, "R" },
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{ OSPF6_OPTION_DC, "DC" },
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{ 0, NULL }
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};
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static const struct bits ospf6_rla_flag_bits[] = {
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{ RLA_FLAG_B, "B" },
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{ RLA_FLAG_E, "E" },
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{ RLA_FLAG_V, "V" },
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{ RLA_FLAG_W, "W" },
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{ 0, NULL }
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};
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static const struct bits ospf6_asla_flag_bits[] = {
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{ ASLA_FLAG_EXTERNAL, "E" },
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{ ASLA_FLAG_FWDADDR, "F" },
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{ ASLA_FLAG_ROUTETAG, "T" },
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{ 0, NULL }
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};
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static struct tok type2str[] = {
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{ OSPF_TYPE_UMD, "umd" },
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{ OSPF_TYPE_HELLO, "hello" },
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{ OSPF_TYPE_DB, "dd" },
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{ OSPF_TYPE_LSR, "ls_req" },
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{ OSPF_TYPE_LSU, "ls_upd" },
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{ OSPF_TYPE_LSA, "ls_ack" },
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{ 0, NULL }
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};
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static char tstr[] = " [|ospf]";
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/* Forwards */
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static inline void ospf6_print_seqage(u_int32_t, time_t);
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static inline void ospf6_print_bits(const struct bits *, u_char);
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static void ospf6_print_ls_type(u_int, const rtrid_t *,
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const rtrid_t *, const char *);
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static int ospf6_print_lshdr(const struct lsa_hdr *);
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static int ospf6_print_lsa(const struct lsa *);
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static int ospf6_decode_v3(const struct ospf6hdr *, const u_char *);
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static inline void
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ospf6_print_seqage(register u_int32_t seq, register time_t us)
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{
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register time_t sec = us % 60;
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register time_t mins = (us / 60) % 60;
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register time_t hour = us / 3600;
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printf(" S %X age ", seq);
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if (hour)
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printf("%u:%02u:%02u",
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(u_int32_t) hour, (u_int32_t) mins, (u_int32_t) sec);
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else if (mins)
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printf("%u:%02u", (u_int32_t) mins, (u_int32_t) sec);
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else
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printf("%u", (u_int32_t) sec);
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}
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static inline void
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ospf6_print_bits(register const struct bits *bp, register u_char options)
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{
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register char sep = ' ';
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do {
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if (options & bp->bit) {
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printf("%c%s", sep, bp->str);
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sep = '/';
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}
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} while ((++bp)->bit);
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}
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static void
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ospf6_print_ls_type(register u_int ls_type,
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register const rtrid_t *ls_stateid,
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register const rtrid_t *ls_router, register const char *fmt)
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{
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char *scope;
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switch (ls_type & LS_SCOPE_MASK) {
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case LS_SCOPE_LINKLOCAL:
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scope = "linklocal-";
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break;
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case LS_SCOPE_AREA:
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scope = "area-";
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break;
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case LS_SCOPE_AS:
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scope = "AS-";
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break;
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default:
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scope = "";
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break;
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}
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switch (ls_type & LS_TYPE_MASK) {
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case LS_TYPE_ROUTER:
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printf(" %srtr %s", scope, ipaddr_string(ls_router));
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break;
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case LS_TYPE_NETWORK:
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printf(" %snet dr %s if %s", scope,
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ipaddr_string(ls_router),
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ipaddr_string(ls_stateid));
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break;
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case LS_TYPE_INTER_AP:
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printf(" %sinter-area-prefix %s abr %s", scope,
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ipaddr_string(ls_stateid),
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ipaddr_string(ls_router));
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break;
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case LS_TYPE_INTER_AR:
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printf(" %sinter-area-router %s rtr %s", scope,
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ipaddr_string(ls_router),
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ipaddr_string(ls_stateid));
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break;
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case LS_TYPE_ASE:
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printf(" %sase %s asbr %s", scope,
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ipaddr_string(ls_stateid),
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ipaddr_string(ls_router));
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break;
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case LS_TYPE_GROUP:
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printf(" %sgroup %s rtr %s", scope,
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ipaddr_string(ls_stateid),
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ipaddr_string(ls_router));
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break;
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case LS_TYPE_TYPE7:
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printf(" %stype7 %s rtr %s", scope,
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ipaddr_string(ls_stateid),
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ipaddr_string(ls_router));
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break;
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case LS_TYPE_LINK:
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printf(" %slink %s rtr %s", scope,
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ipaddr_string(ls_stateid),
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ipaddr_string(ls_router));
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break;
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case LS_TYPE_INTRA_AP:
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printf(" %sintra-area-prefix %s rtr %s", scope,
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ipaddr_string(ls_stateid),
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ipaddr_string(ls_router));
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break;
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default:
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printf(" %s", scope);
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printf(fmt, ls_type);
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break;
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}
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}
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static int
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ospf6_print_lshdr(register const struct lsa_hdr *lshp)
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{
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TCHECK(lshp->ls_type);
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printf(" {"); /* } (ctags) */
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TCHECK(lshp->ls_seq);
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ospf6_print_seqage(ntohl(lshp->ls_seq), ntohs(lshp->ls_age));
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ospf6_print_ls_type(ntohs(lshp->ls_type), &lshp->ls_stateid,
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&lshp->ls_router, "ls_type %d");
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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 lsa_prefix *lsapp)
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{
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int k;
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struct in6_addr prefix;
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TCHECK(*lsapp);
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k = (lsapp->lsa_p_len + 31) / 32;
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if (k * 4 > sizeof(struct in6_addr)) {
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printf("??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, k * 4);
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printf(" %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("(opt=%x)", lsapp->lsa_p_opt);
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if (lsapp->lsa_p_mbz)
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printf("(mbz=%x)", ntohs(lsapp->lsa_p_mbz)); /* XXX */
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return sizeof(*lsapp) - 4 + k * 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 lsa *lsap)
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{
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register const u_char *ls_end, *ls_opt;
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register const struct rlalink *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 lsa_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 int j, k;
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u_int32_t flags32;
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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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ls_end = (u_char *)lsap + ntohs(lsap->ls_hdr.ls_length);
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switch (ntohs(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_flags);
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ospf6_print_bits(ospf6_rla_flag_bits,
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lsap->lsa_un.un_rla.rla_flags);
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TCHECK(lsap->lsa_un.un_rla.rla_options);
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ospf6_print_bits(ospf6_option_bits,
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ntohl(lsap->lsa_un.un_rla.rla_options));
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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 + sizeof(*rlp) <= (struct rlalink *)ls_end) {
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TCHECK(*rlp);
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printf(" {"); /* } (ctags) */
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switch (rlp->link_type) {
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case RLA_TYPE_VIRTUAL:
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printf(" virt");
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/* Fall through */
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case RLA_TYPE_ROUTER:
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printf(" nbrid %s nbrif %s if %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(" dr %s drif %s if %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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/* { (ctags) */
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printf(" ??RouterLinksType 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", ntohs(rlp->link_metric));
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/* { (ctags) */
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printf(" }");
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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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ospf6_print_bits(ospf6_option_bits,
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ntohl(lsap->lsa_un.un_nla.nla_options));
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printf(" rtrs");
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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(" %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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(u_int32_t)ntohl(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 lsa_prefix *)ls_end) {
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k = ospf6_print_lsaprefix(lsapp);
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if (k)
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goto trunc;
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lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k);
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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 = ntohl(lsap->lsa_un.un_asla.asla_metric);
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ospf6_print_bits(ospf6_asla_flag_bits, flags32);
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printf(" metric %u",
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ntohl(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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k = ospf6_print_lsaprefix(lsapp);
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if (k < 0)
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goto trunc;
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if ((ls_opt = (u_char *)(((u_char *)lsapp) + k)) < 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_mbz) {
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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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#if 0
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case LS_TYPE_SUM_ABR:
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TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
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lp = lsap->lsa_un.un_sla.sla_tosmetric;
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while ((u_char *)lp < ls_end) {
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register u_int32_t ul;
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TCHECK(*lp);
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ul = ntohl(*lp);
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printf(" tos %d metric %d",
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(ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS,
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ul & SLA_MASK_METRIC);
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++lp;
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}
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break;
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case LS_TYPE_GROUP:
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/* Multicast extensions as of 23 July 1991 */
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mcp = lsap->lsa_un.un_mcla;
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while ((u_char *)mcp < ls_end) {
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TCHECK(mcp->mcla_vid);
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switch (ntohl(mcp->mcla_vtype)) {
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case MCLA_VERTEX_ROUTER:
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printf(" rtr rtrid %s",
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ipaddr_string(&mcp->mcla_vid));
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break;
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case MCLA_VERTEX_NETWORK:
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printf(" net dr %s",
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ipaddr_string(&mcp->mcla_vid));
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break;
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default:
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printf(" ??VertexType %u??",
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(u_int32_t)ntohl(mcp->mcla_vtype));
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break;
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}
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++mcp;
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}
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#endif
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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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ospf6_print_bits(ospf6_option_bits, ntohl(llsap->llsa_options));
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TCHECK(llsap->llsa_nprefix);
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printf(" pri %d lladdr %s npref %d", llsap->llsa_priority,
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ip6addr_string(&llsap->llsa_lladdr),
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(u_int32_t)ntohl(llsap->llsa_nprefix));
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lsapp = llsap->llsa_prefix;
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for (j = 0; j < ntohl(llsap->llsa_nprefix); j++) {
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k = ospf6_print_lsaprefix(lsapp);
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if (k)
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goto trunc;
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lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k);
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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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ntohs(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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&lsap->lsa_un.un_intra_ap.intra_ap_rtid,
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"LinkStateType %d");
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TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
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printf(" npref %d",
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ntohs(lsap->lsa_un.un_intra_ap.intra_ap_nprefix));
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lsapp = lsap->lsa_un.un_intra_ap.intra_ap_prefix;
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for (j = 0;
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j < ntohs(lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
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j++) {
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k = ospf6_print_lsaprefix(lsapp);
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if (k)
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goto trunc;
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lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k);
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}
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break;
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default:
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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);
|
|
}
|