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tcpdump/print-ospf6.c
itojun 37a7b57f5e correct ospf6 AS external LSA printing. 
From: jinmei@kame.net
2000-05-12 13:01:01 +00:00

688 lines
16 KiB
C
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/*
* 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 (jch@mitchell.cit.cornell.edu)
*/
#ifndef lint
static const char rcsid[] =
"@(#) $Header: /tcpdump/master/tcpdump/print-ospf6.c,v 1.4 2000-05-12 13:01:02 itojun Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/param.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#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]";
/* 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) {
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);
}
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