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/*
* Copyright (c) 1992, 1993, 1994
* 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 char rcsid[] =
"@(#) $Header: print-ospf.c,v 1.12 94/06/14 20:18:46 leres Exp $ (LBL)";
#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 <errno.h>
#include <ctype.h>
#include <stdio.h>
#include "interface.h"
#include "addrtoname.h"
#include "ospf.h"
#ifndef __GNUC__
#define inline
#endif
struct bits {
u_int32 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 const char *ospf_types[OSPF_TYPE_MAX] = {
(char *) 0,
"hello",
"dd",
"ls_req",
"ls_upd",
"ls_ack"
};
static inline void
ospf_print_seqage(register u_int32 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("%d:%02d:%02d",
hour,
mins,
sec);
} else if (mins) {
printf("%d:%02d",
mins,
sec);
} else {
printf("%d",
sec);
}
}
static inline void
ospf_print_bits(register const struct bits *bp, register u_char options)
{
char sep = ' ';
do {
if (options & bp->bit) {
printf("%c%s",
sep,
bp->str);
sep = '/';
}
} while ((++bp)->bit) ;
}
#define LS_PRINT(lsp, type) switch (type) { \
case LS_TYPE_ROUTER: \
printf(" rtr %s ", ipaddr_string(&lsp->ls_router)); break; \
case LS_TYPE_NETWORK: \
printf(" net dr %s if %s", ipaddr_string(&lsp->ls_router), ipaddr_string(&lsp->ls_stateid)); break; \
case LS_TYPE_SUM_IP: \
printf(" sum %s abr %s", ipaddr_string(&lsp->ls_stateid), ipaddr_string(&lsp->ls_router)); break; \
case LS_TYPE_SUM_ABR: \
printf(" abr %s rtr %s", ipaddr_string(&lsp->ls_router), ipaddr_string(&lsp->ls_stateid)); break; \
case LS_TYPE_ASE: \
printf(" ase %s asbr %s", ipaddr_string(&lsp->ls_stateid), ipaddr_string(&lsp->ls_router)); break; \
case LS_TYPE_GROUP: \
printf(" group %s rtr %s", ipaddr_string(&lsp->ls_stateid), ipaddr_string(&lsp->ls_router)); break; \
}
static int
ospf_print_lshdr(register const struct lsa_hdr *lshp, const caddr_t end)
{
if ((caddr_t) (lshp + 1) > end) {
return 1;
}
printf(" {"); /* } (ctags) */
if (!lshp->ls_type || lshp->ls_type >= LS_TYPE_MAX) {
printf(" ??LS type %d?? }", /* { (ctags) */
lshp->ls_type);
return 1;
}
ospf_print_bits(ospf_option_bits, lshp->ls_options);
ospf_print_seqage(ntohl(lshp->ls_seq),
ntohs(lshp->ls_age));
LS_PRINT(lshp, lshp->ls_type);
return 0;
}
/*
* Print a single link state advertisement. If truncated return 1, else 0.
*/
static int
ospf_print_lsa(register const struct lsa *lsap, const caddr_t end)
{
register const char *ls_end;
const struct rlalink *rlp;
const struct tos_metric *tosp;
const struct in_addr *ap;
const struct aslametric *almp;
const struct mcla *mcp;
const u_int32 *lp;
int j, k;
if (ospf_print_lshdr(&lsap->ls_hdr, end)) {
return 1;
}
ls_end = (caddr_t) lsap + ntohs(lsap->ls_hdr.ls_length);
if (ls_end > end) {
printf(" }"); /* { (ctags) */
return 1;
}
switch (lsap->ls_hdr.ls_type) {
case LS_TYPE_ROUTER:
ospf_print_bits(ospf_rla_flag_bits, lsap->lsa_un.un_rla.rla_flags);
j = ntohs(lsap->lsa_un.un_rla.rla_count);
rlp = lsap->lsa_un.un_rla.rla_link;
while (j--) {
struct rlalink *rln = (struct rlalink *) ((caddr_t) (rlp + 1) + ((rlp->link_toscount) * sizeof (struct tos_metric)));
if ((caddr_t) rln > ls_end) {
break;
}
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:
printf(" ??RouterLinksType %d?? }", /* { (ctags) */
rlp->link_type);
return 0;
}
printf(" tos 0 metric %d",
ntohs(rlp->link_tos0metric));
tosp = (struct tos_metric *) ((sizeof rlp->link_tos0metric) + (caddr_t) rlp);
for (k = 0; k < rlp->link_toscount; k++, tosp++) {
printf(" tos %d metric %d",
ntohs(tosp->tos_type),
ntohs(tosp->tos_metric));
}
printf(" }"); /* { (ctags) */
rlp = rln;
}
break;
case LS_TYPE_NETWORK:
printf(" mask %s rtrs",
ipaddr_string(&lsap->lsa_un.un_nla.nla_mask));
for (ap = lsap->lsa_un.un_nla.nla_router;
(caddr_t) (ap + 1) <= ls_end;
ap++) {
printf(" %s",
ipaddr_string(ap));
}
break;
case LS_TYPE_SUM_IP:
printf(" mask %s",
ipaddr_string(&lsap->lsa_un.un_sla.sla_mask));
/* Fall through */
case LS_TYPE_SUM_ABR:
for (lp = lsap->lsa_un.un_sla.sla_tosmetric;
(caddr_t) (lp + 1) <= ls_end;
lp++) {
u_int32 ul = ntohl(*lp);
printf(" tos %d metric %d",
(ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS,
ul & SLA_MASK_METRIC);
}
break;
case LS_TYPE_ASE:
printf(" mask %s",
ipaddr_string(&lsap->lsa_un.un_asla.asla_mask));
for (almp = lsap->lsa_un.un_asla.asla_metric;
(caddr_t) (almp + 1) <= ls_end;
almp++) {
u_int32 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));
if (almp->asla_forward.s_addr) {
printf(" forward %s",
ipaddr_string(&almp->asla_forward));
}
if (almp->asla_tag.s_addr) {
printf(" tag %s",
ipaddr_string(&almp->asla_tag));
}
}
break;
case LS_TYPE_GROUP:
/* Multicast extensions as of 23 July 1991 */
for (mcp = lsap->lsa_un.un_mcla;
(caddr_t) (mcp + 1) <= ls_end;
mcp++) {
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 %d??",
ntohl(mcp->mcla_vtype));
break;
}
}
}
printf(" }"); /* { (ctags) */
return 0;
}
void
ospf_print(register const u_char *bp, register int length,
register const u_char *bp2)
{
register const struct ospfhdr *op;
register const struct ip *ip;
register const caddr_t end = (caddr_t)snapend;
register const struct lsa *lsap;
register const struct lsa_hdr *lshp;
char sep;
int i, j;
const struct in_addr *ap;
const struct lsr *lsrp;
op = (struct ospfhdr *)bp;
ip = (struct ip *)bp2;
/* Print the source and destination address */
(void) printf("%s > %s:",
ipaddr_string(&ip->ip_src),
ipaddr_string(&ip->ip_dst));
if ((caddr_t) (&op->ospf_len + 1) > end) {
goto trunc_test;
}
/* If the type is valid translate it, or just print the type */
/* value. If it's not valid, say so and return */
if (op->ospf_type || op->ospf_type < OSPF_TYPE_MAX) {
printf(" OSPFv%d-%s %d:",
op->ospf_version,
ospf_types[op->ospf_type],
length);
} else {
printf(" ospf-v%d-??type %d?? %d:",
op->ospf_version,
op->ospf_type,
length);
return;
}
if (length != ntohs(op->ospf_len)) {
printf(" ??len %d??",
ntohs(op->ospf_len));
goto trunc_test;
}
if ((caddr_t) (&op->ospf_routerid + 1) > end) {
goto trunc_test;
}
/* Print the routerid if it is not the same as the source */
if (ip->ip_src.s_addr != op->ospf_routerid.s_addr) {
printf(" rtrid %s",
ipaddr_string(&op->ospf_routerid));
}
if ((caddr_t) (&op->ospf_areaid + 1) > end) {
goto trunc_test;
}
if (op->ospf_areaid.s_addr) {
printf(" area %s",
ipaddr_string(&op->ospf_areaid));
} else {
printf(" backbone");
}
if ((caddr_t) (op->ospf_authdata + OSPF_AUTH_SIZE) > end) {
goto trunc_test;
}
if (vflag) {
/* Print authentication data (should we really do this?) */
switch (ntohs(op->ospf_authtype)) {
case OSPF_AUTH_NONE:
break;
case OSPF_AUTH_SIMPLE:
printf(" auth ");
j = 0;
for (i = 0; i < sizeof (op->ospf_authdata); i++) {
if (!isprint(op->ospf_authdata[i])) {
j = 1;
break;
}
}
if (j) {
/* Print the auth-data as a string of octets */
printf("%s.%s",
ipaddr_string((struct in_addr *) op->ospf_authdata),
ipaddr_string((struct in_addr *) &op->ospf_authdata[sizeof (struct in_addr)]));
} else {
/* Print the auth-data as a text string */
printf("'%.8s'",
op->ospf_authdata);
}
break;
default:
printf(" ??authtype-%d??",
ntohs(op->ospf_authtype));
return;
}
}
/* Do rest according to version. */
switch (op->ospf_version) {
case 2:
/* ospf version 2 */
switch (op->ospf_type) {
case OSPF_TYPE_UMD: /* Rob Coltun's special monitoring packets; do nothing */
break;
case OSPF_TYPE_HELLO:
if ((caddr_t) (&op->ospf_hello.hello_deadint + 1) > end) {
break;
}
if (vflag) {
ospf_print_bits(ospf_option_bits, op->ospf_hello.hello_options);
printf(" mask %s int %d pri %d dead %d",
ipaddr_string(&op->ospf_hello.hello_mask),
ntohs(op->ospf_hello.hello_helloint),
op->ospf_hello.hello_priority,
ntohl(op->ospf_hello.hello_deadint));
}
if ((caddr_t) (&op->ospf_hello.hello_dr + 1) > end) {
break;
}
if (op->ospf_hello.hello_dr.s_addr) {
printf(" dr %s",
ipaddr_string(&op->ospf_hello.hello_dr));
}
if ((caddr_t) (&op->ospf_hello.hello_bdr + 1) > end) {
break;
}
if (op->ospf_hello.hello_bdr.s_addr) {
printf(" bdr %s",
ipaddr_string(&op->ospf_hello.hello_bdr));
}
if (vflag) {
if ((caddr_t) (op->ospf_hello.hello_neighbor + 1) > end) {
break;
}
printf(" nbrs");
for (ap = op->ospf_hello.hello_neighbor;
(caddr_t) (ap + 1) <= end;
ap++) {
printf(" %s",
ipaddr_string(ap));
}
}
break; /* HELLO */
case OSPF_TYPE_DB:
if ((caddr_t) (&op->ospf_db.db_seq + 1) > end) {
break;
}
ospf_print_bits(ospf_option_bits, op->ospf_db.db_options);
sep = ' ';
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 = '/';
}
printf(" S %X",
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, end)) {
printf(" }"); /* { (ctags) */
lshp++;
}
}
break;
case OSPF_TYPE_LSR:
if (vflag) {
for (lsrp = op->ospf_lsr; (caddr_t) (lsrp+1) <= end; lsrp++) {
int32 type;
if ((caddr_t) (lsrp + 1) > end) {
break;
}
printf(" {"); /* } (ctags) */
if (!(type = lsrp->ls_type) || type >= LS_TYPE_MAX) {
printf(" ??LinkStateType %d }", /* { (ctags) */
type);
printf(" }"); /* { (ctags) */
break;
}
LS_PRINT(lsrp, type);
printf(" }"); /* { (ctags) */
}
}
break;
case OSPF_TYPE_LSU:
if (vflag) {
lsap = op->ospf_lsu.lsu_lsa;
i = ntohl(op->ospf_lsu.lsu_count);
while (i-- &&
!ospf_print_lsa(lsap, end)) {
lsap = (struct lsa *) ((caddr_t) 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, end)) {
printf(" }"); /* { (ctags) */
lshp++;
}
break;
}
} /* end switch on v2 packet type */
break;
default:
printf(" ospf [version %d]",
op->ospf_version);
break;
} /* end switch on version */
trunc_test:
if ((snapend - bp) < length) {
printf(" [|]");
}
return; /* from ospf_print */
}
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