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freebsd/contrib/tcpdump/print-ospf.c

589 lines
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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-ospf.c,v 1.31 2001/06/28 04:34:51 fenner 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 <ctype.h>
#include <stdio.h>
#include "interface.h"
#include "addrtoname.h"
#include "ospf.h"
#include "ip.h"
struct bits {
u_int32_t bit;
const char *str;
};
static const struct bits ospf_option_bits[] = {
{ OSPF_OPTION_T, "T" },
{ OSPF_OPTION_E, "E" },
{ OSPF_OPTION_MC, "MC" },
{ 0, NULL }
};
static const struct bits ospf_rla_flag_bits[] = {
{ RLA_FLAG_B, "B" },
{ RLA_FLAG_E, "E" },
{ RLA_FLAG_W1, "W1" },
{ RLA_FLAG_W2, "W2" },
{ 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 ospf_print_seqage(u_int32_t, time_t);
static inline void ospf_print_bits(const struct bits *, u_char);
static void ospf_print_ls_type(u_int, const struct in_addr *,
const struct in_addr *, const char *);
static int ospf_print_lshdr(const struct lsa_hdr *);
static int ospf_print_lsa(const struct lsa *);
static int ospf_decode_v2(const struct ospfhdr *, const u_char *);
static inline void
ospf_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
ospf_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
ospf_print_ls_type(register u_int ls_type,
register const struct in_addr *ls_stateid,
register const struct in_addr *ls_router, register const char *fmt)
{
switch (ls_type) {
case LS_TYPE_ROUTER:
printf(" rtr %s ", ipaddr_string(ls_router));
break;
case LS_TYPE_NETWORK:
printf(" net dr %s if %s",
ipaddr_string(ls_router),
ipaddr_string(ls_stateid));
break;
case LS_TYPE_SUM_IP:
printf(" sum %s abr %s",
ipaddr_string(ls_stateid),
ipaddr_string(ls_router));
break;
case LS_TYPE_SUM_ABR:
printf(" abr %s rtr %s",
ipaddr_string(ls_router),
ipaddr_string(ls_stateid));
break;
case LS_TYPE_ASE:
printf(" ase %s asbr %s",
ipaddr_string(ls_stateid),
ipaddr_string(ls_router));
break;
case LS_TYPE_GROUP:
printf(" group %s rtr %s",
ipaddr_string(ls_stateid),
ipaddr_string(ls_router));
break;
default:
putchar(' ');
printf(fmt, ls_type);
break;
}
}
static int
ospf_print_lshdr(register const struct lsa_hdr *lshp)
{
TCHECK(lshp->ls_type);
printf(" {"); /* } (ctags) */
TCHECK(lshp->ls_options);
ospf_print_bits(ospf_option_bits, lshp->ls_options);
TCHECK(lshp->ls_seq);
ospf_print_seqage(ntohl(lshp->ls_seq), ntohs(lshp->ls_age));
ospf_print_ls_type(lshp->ls_type, &lshp->ls_stateid, &lshp->ls_router,
"ls_type %d");
return (0);
trunc:
return (1);
}
/*
* Print a single link state advertisement. If truncated return 1, else 0.
*/
static int
ospf_print_lsa(register const struct lsa *lsap)
{
register const u_char *ls_end;
register const struct rlalink *rlp;
register const struct tos_metric *tosp;
register const struct in_addr *ap;
register const struct aslametric *almp;
register const struct mcla *mcp;
register const u_int32_t *lp;
register int j, k;
if (ospf_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 (lsap->ls_hdr.ls_type) {
case LS_TYPE_ROUTER:
TCHECK(lsap->lsa_un.un_rla.rla_flags);
ospf_print_bits(ospf_rla_flag_bits,
lsap->lsa_un.un_rla.rla_flags);
TCHECK(lsap->lsa_un.un_rla.rla_count);
j = ntohs(lsap->lsa_un.un_rla.rla_count);
TCHECK(lsap->lsa_un.un_rla.rla_link);
rlp = lsap->lsa_un.un_rla.rla_link;
while (j--) {
TCHECK(*rlp);
printf(" {"); /* } (ctags) */
switch (rlp->link_type) {
case RLA_TYPE_VIRTUAL:
printf(" virt");
/* Fall through */
case RLA_TYPE_ROUTER:
printf(" nbrid %s if %s",
ipaddr_string(&rlp->link_id),
ipaddr_string(&rlp->link_data));
break;
case RLA_TYPE_TRANSIT:
printf(" dr %s if %s",
ipaddr_string(&rlp->link_id),
ipaddr_string(&rlp->link_data));
break;
case RLA_TYPE_STUB:
printf(" net %s mask %s",
ipaddr_string(&rlp->link_id),
ipaddr_string(&rlp->link_data));
break;
default:
/* { (ctags) */
printf(" ??RouterLinksType %d?? }",
rlp->link_type);
return (0);
}
printf(" tos 0 metric %d", ntohs(rlp->link_tos0metric));
tosp = (struct tos_metric *)
((sizeof rlp->link_tos0metric) + (u_char *) rlp);
for (k = 0; k < (int) rlp->link_toscount; ++k, ++tosp) {
TCHECK(*tosp);
printf(" tos %d metric %d",
tosp->tos_type,
ntohs(tosp->tos_metric));
}
/* { (ctags) */
printf(" }");
rlp = (struct rlalink *)((u_char *)(rlp + 1) +
((rlp->link_toscount) * sizeof(*tosp)));
}
break;
case LS_TYPE_NETWORK:
TCHECK(lsap->lsa_un.un_nla.nla_mask);
printf(" mask %s rtrs",
ipaddr_string(&lsap->lsa_un.un_nla.nla_mask));
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_SUM_IP:
TCHECK(lsap->lsa_un.un_nla.nla_mask);
printf(" mask %s",
ipaddr_string(&lsap->lsa_un.un_sla.sla_mask));
/* Fall through */
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_ASE:
TCHECK(lsap->lsa_un.un_nla.nla_mask);
printf(" mask %s",
ipaddr_string(&lsap->lsa_un.un_asla.asla_mask));
TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
almp = lsap->lsa_un.un_asla.asla_metric;
while ((u_char *)almp < ls_end) {
register u_int32_t ul;
TCHECK(almp->asla_tosmetric);
ul = ntohl(almp->asla_tosmetric);
printf(" type %d tos %d metric %d",
(ul & ASLA_FLAG_EXTERNAL) ? 2 : 1,
(ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS,
(ul & ASLA_MASK_METRIC));
TCHECK(almp->asla_forward);
if (almp->asla_forward.s_addr) {
printf(" forward %s",
ipaddr_string(&almp->asla_forward));
}
TCHECK(almp->asla_tag);
if (almp->asla_tag.s_addr) {
printf(" tag %s",
ipaddr_string(&almp->asla_tag));
}
++almp;
}
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;
}
}
/* { (ctags) */
fputs(" }", stdout);
return (0);
trunc:
fputs(" }", stdout);
return (1);
}
static int
ospf_decode_v2(register const struct ospfhdr *op,
register const u_char *dataend)
{
register const struct in_addr *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->ospf_type) {
case OSPF_TYPE_UMD:
/*
* Rob Coltun's special monitoring packets;
* do nothing
*/
break;
case OSPF_TYPE_HELLO:
if (vflag) {
TCHECK(op->ospf_hello.hello_deadint);
ospf_print_bits(ospf_option_bits,
op->ospf_hello.hello_options);
printf(" mask %s int %d pri %d dead %u",
ipaddr_string(&op->ospf_hello.hello_mask),
ntohs(op->ospf_hello.hello_helloint),
op->ospf_hello.hello_priority,
(u_int32_t)ntohl(op->ospf_hello.hello_deadint));
}
TCHECK(op->ospf_hello.hello_dr);
if (op->ospf_hello.hello_dr.s_addr != 0)
printf(" dr %s",
ipaddr_string(&op->ospf_hello.hello_dr));
TCHECK(op->ospf_hello.hello_bdr);
if (op->ospf_hello.hello_bdr.s_addr != 0)
printf(" bdr %s",
ipaddr_string(&op->ospf_hello.hello_bdr));
if (vflag) {
ap = op->ospf_hello.hello_neighbor;
if ((u_char *)ap < dataend)
printf(" nbrs");
while ((u_char *)ap < dataend) {
TCHECK(*ap);
printf(" %s", ipaddr_string(ap));
++ap;
}
}
break; /* HELLO */
case OSPF_TYPE_DB:
TCHECK(op->ospf_db.db_options);
ospf_print_bits(ospf_option_bits, op->ospf_db.db_options);
sep = ' ';
TCHECK(op->ospf_db.db_flags);
if (op->ospf_db.db_flags & OSPF_DB_INIT) {
printf("%cI", sep);
sep = '/';
}
if (op->ospf_db.db_flags & OSPF_DB_MORE) {
printf("%cM", sep);
sep = '/';
}
if (op->ospf_db.db_flags & OSPF_DB_MASTER) {
printf("%cMS", sep);
sep = '/';
}
TCHECK(op->ospf_db.db_seq);
printf(" S %X", (u_int32_t)ntohl(op->ospf_db.db_seq));
if (vflag) {
/* Print all the LS adv's */
lshp = op->ospf_db.db_lshdr;
while (!ospf_print_lshdr(lshp)) {
/* { (ctags) */
printf(" }");
++lshp;
}
}
break;
case OSPF_TYPE_LSR:
if (vflag) {
lsrp = op->ospf_lsr;
while ((u_char *)lsrp < dataend) {
TCHECK(*lsrp);
printf(" {"); /* } (ctags) */
ospf_print_ls_type(ntohl(lsrp->ls_type),
&lsrp->ls_stateid,
&lsrp->ls_router,
"LinkStateType %d");
/* { (ctags) */
printf(" }");
++lsrp;
}
}
break;
case OSPF_TYPE_LSU:
if (vflag) {
lsap = op->ospf_lsu.lsu_lsa;
TCHECK(op->ospf_lsu.lsu_count);
i = ntohl(op->ospf_lsu.lsu_count);
while (i--) {
if (ospf_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->ospf_lsa.lsa_lshdr;
while (!ospf_print_lshdr(lshp)) {
/* { (ctags) */
printf(" }");
++lshp;
}
}
break;
default:
printf("v2 type %d", op->ospf_type);
break;
}
return (0);
trunc:
return (1);
}
void
ospf_print(register const u_char *bp, register u_int length,
register const u_char *bp2)
{
register const struct ospfhdr *op;
register const struct ip *ip;
register const u_char *dataend;
register const char *cp;
op = (struct ospfhdr *)bp;
ip = (struct ip *)bp2;
/* XXX Before we do anything else, strip off the MD5 trailer */
TCHECK(op->ospf_authtype);
if (ntohs(op->ospf_authtype) == OSPF_AUTH_MD5) {
length -= OSPF_AUTH_MD5_LEN;
snapend -= OSPF_AUTH_MD5_LEN;
}
/* If the type is valid translate it, or just print the type */
/* value. If it's not valid, say so and return */
TCHECK(op->ospf_type);
cp = tok2str(type2str, "type%d", op->ospf_type);
printf("OSPFv%d-%s %d:", op->ospf_version, cp, length);
if (*cp == 't')
return;
TCHECK(op->ospf_len);
if (length != ntohs(op->ospf_len)) {
printf(" [len %d]", ntohs(op->ospf_len));
return;
}
dataend = bp + length;
/* Print the routerid if it is not the same as the source */
TCHECK(op->ospf_routerid);
if (ip->ip_src.s_addr != op->ospf_routerid.s_addr)
printf(" rtrid %s", ipaddr_string(&op->ospf_routerid));
TCHECK(op->ospf_areaid);
if (op->ospf_areaid.s_addr != 0)
printf(" area %s", ipaddr_string(&op->ospf_areaid));
else
printf(" backbone");
if (vflag) {
/* Print authentication data (should we really do this?) */
TCHECK2(op->ospf_authdata[0], sizeof(op->ospf_authdata));
switch (ntohs(op->ospf_authtype)) {
case OSPF_AUTH_NONE:
break;
case OSPF_AUTH_SIMPLE:
printf(" auth \"");
(void)fn_printn(op->ospf_authdata,
sizeof(op->ospf_authdata), NULL);
printf("\"");
break;
case OSPF_AUTH_MD5:
printf(" auth MD5");
break;
default:
printf(" ??authtype-%d??", ntohs(op->ospf_authtype));
return;
}
}
/* Do rest according to version. */
switch (op->ospf_version) {
case 2:
/* ospf version 2 */
if (ospf_decode_v2(op, dataend))
goto trunc;
break;
default:
printf(" ospf [version %d]", op->ospf_version);
break;
} /* end switch on version */
return;
trunc:
fputs(tstr, stdout);
}
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