569 lines
14 KiB
C
569 lines
14 KiB
C
/*
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* Copyright (c) 1992, 1993, 1994, 1995, 1996
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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 char rcsid[] =
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"@(#) $Header: print-ospf.c,v 1.19 96/07/14 19:39:03 leres Exp $ (LBL)";
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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 <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/ip_var.h>
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#include <ctype.h>
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#include <stdio.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "ospf.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 ospf_option_bits[] = {
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{ OSPF_OPTION_T, "T" },
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{ OSPF_OPTION_E, "E" },
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{ OSPF_OPTION_MC, "MC" },
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{ 0, NULL }
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};
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static const struct bits ospf_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_W1, "W1" },
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{ RLA_FLAG_W2, "W2" },
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{ 0, NULL }
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};
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static const char *ospf_types[OSPF_TYPE_MAX] = {
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(char *) 0,
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"hello",
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"dd",
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"ls_req",
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"ls_upd",
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"ls_ack"
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};
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static inline void
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ospf_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,
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(u_int32_t)mins,
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(u_int32_t)sec);
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} else if (mins) {
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printf("%u:%02u",
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(u_int32_t)mins,
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(u_int32_t)sec);
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} else {
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printf("%u",
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(u_int32_t)sec);
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}
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}
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static inline void
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ospf_print_bits(register const struct bits *bp, register u_char options)
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{
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char sep = ' ';
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do {
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if (options & bp->bit) {
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printf("%c%s",
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sep,
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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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#define LS_PRINT(lsp, type) switch (type) { \
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case LS_TYPE_ROUTER: \
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printf(" rtr %s ", ipaddr_string(&lsp->ls_router)); break; \
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case LS_TYPE_NETWORK: \
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printf(" net dr %s if %s", ipaddr_string(&lsp->ls_router), ipaddr_string(&lsp->ls_stateid)); break; \
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case LS_TYPE_SUM_IP: \
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printf(" sum %s abr %s", ipaddr_string(&lsp->ls_stateid), ipaddr_string(&lsp->ls_router)); break; \
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case LS_TYPE_SUM_ABR: \
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printf(" abr %s rtr %s", ipaddr_string(&lsp->ls_router), ipaddr_string(&lsp->ls_stateid)); break; \
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case LS_TYPE_ASE: \
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printf(" ase %s asbr %s", ipaddr_string(&lsp->ls_stateid), ipaddr_string(&lsp->ls_router)); break; \
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case LS_TYPE_GROUP: \
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printf(" group %s rtr %s", ipaddr_string(&lsp->ls_stateid), ipaddr_string(&lsp->ls_router)); break; \
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}
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static int
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ospf_print_lshdr(register const struct lsa_hdr *lshp, const caddr_t end)
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{
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if ((caddr_t) (lshp + 1) > end) {
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return 1;
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}
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printf(" {"); /* } (ctags) */
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if (!lshp->ls_type || lshp->ls_type >= LS_TYPE_MAX) {
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printf(" ??LS type %d?? }", lshp->ls_type); /* { (ctags) */
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return 1;
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}
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ospf_print_bits(ospf_option_bits, lshp->ls_options);
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ospf_print_seqage(ntohl(lshp->ls_seq), ntohs(lshp->ls_age));
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LS_PRINT(lshp, lshp->ls_type);
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return 0;
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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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ospf_print_lsa(register const struct lsa *lsap, const caddr_t end)
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{
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register const char *ls_end;
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const struct rlalink *rlp;
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const struct tos_metric *tosp;
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const struct in_addr *ap;
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const struct aslametric *almp;
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const struct mcla *mcp;
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const u_int32_t *lp;
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int j, k;
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if (ospf_print_lshdr(&lsap->ls_hdr, end)) {
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return 1;
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}
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ls_end = (caddr_t) lsap + ntohs(lsap->ls_hdr.ls_length);
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if (ls_end > end) {
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printf(" }"); /* { (ctags) */
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return 1;
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}
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switch (lsap->ls_hdr.ls_type) {
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case LS_TYPE_ROUTER:
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ospf_print_bits(ospf_rla_flag_bits, lsap->lsa_un.un_rla.rla_flags);
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j = ntohs(lsap->lsa_un.un_rla.rla_count);
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rlp = lsap->lsa_un.un_rla.rla_link;
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while (j--) {
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struct rlalink *rln = (struct rlalink *) ((caddr_t) (rlp + 1) + ((rlp->link_toscount) * sizeof (struct tos_metric)));
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if ((caddr_t) rln > ls_end) {
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break;
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}
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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 if %s",
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ipaddr_string(&rlp->link_id),
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ipaddr_string(&rlp->link_data));
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break;
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case RLA_TYPE_TRANSIT:
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printf(" dr %s if %s",
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ipaddr_string(&rlp->link_id),
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ipaddr_string(&rlp->link_data));
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break;
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case RLA_TYPE_STUB:
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printf(" net %s mask %s",
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ipaddr_string(&rlp->link_id),
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ipaddr_string(&rlp->link_data));
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break;
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default:
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printf(" ??RouterLinksType %d?? }", /* { (ctags) */
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rlp->link_type);
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return 0;
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}
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printf(" tos 0 metric %d",
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ntohs(rlp->link_tos0metric));
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tosp = (struct tos_metric *) ((sizeof rlp->link_tos0metric) + (caddr_t) rlp);
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for (k = 0; k < rlp->link_toscount; k++, tosp++) {
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printf(" tos %d metric %d",
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tosp->tos_type,
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ntohs(tosp->tos_metric));
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}
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printf(" }"); /* { (ctags) */
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rlp = rln;
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}
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break;
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case LS_TYPE_NETWORK:
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printf(" mask %s rtrs",
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ipaddr_string(&lsap->lsa_un.un_nla.nla_mask));
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for (ap = lsap->lsa_un.un_nla.nla_router;
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(caddr_t) (ap + 1) <= ls_end;
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ap++) {
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printf(" %s",
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ipaddr_string(ap));
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}
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break;
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case LS_TYPE_SUM_IP:
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printf(" mask %s",
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ipaddr_string(&lsap->lsa_un.un_sla.sla_mask));
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/* Fall through */
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case LS_TYPE_SUM_ABR:
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for (lp = lsap->lsa_un.un_sla.sla_tosmetric;
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(caddr_t) (lp + 1) <= ls_end;
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lp++) {
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u_int32_t 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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}
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break;
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case LS_TYPE_ASE:
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printf(" mask %s",
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ipaddr_string(&lsap->lsa_un.un_asla.asla_mask));
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for (almp = lsap->lsa_un.un_asla.asla_metric;
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(caddr_t) (almp + 1) <= ls_end;
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almp++) {
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u_int32_t ul = ntohl(almp->asla_tosmetric);
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printf(" type %d tos %d metric %d",
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(ul & ASLA_FLAG_EXTERNAL) ? 2 : 1,
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(ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS,
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(ul & ASLA_MASK_METRIC));
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if (almp->asla_forward.s_addr) {
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printf(" forward %s",
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ipaddr_string(&almp->asla_forward));
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}
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if (almp->asla_tag.s_addr) {
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printf(" tag %s",
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ipaddr_string(&almp->asla_tag));
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}
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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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for (mcp = lsap->lsa_un.un_mcla;
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(caddr_t) (mcp + 1) <= ls_end;
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mcp++) {
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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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}
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}
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printf(" }"); /* { (ctags) */
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return 0;
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}
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void
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ospf_print(register const u_char *bp, register u_int length,
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register const u_char *bp2)
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{
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register const struct ospfhdr *op;
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register const struct ip *ip;
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register const caddr_t end = (caddr_t)snapend;
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register const struct lsa *lsap;
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register const struct lsa_hdr *lshp;
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char sep;
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int i, j;
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const struct in_addr *ap;
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const struct lsr *lsrp;
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op = (struct ospfhdr *)bp;
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ip = (struct ip *)bp2;
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/* Print the source and destination address */
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(void) printf("%s > %s:",
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ipaddr_string(&ip->ip_src),
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ipaddr_string(&ip->ip_dst));
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if ((caddr_t) (&op->ospf_len + 1) > end) {
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goto trunc_test;
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}
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/* If the type is valid translate it, or just print the type */
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/* value. If it's not valid, say so and return */
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if (op->ospf_type || op->ospf_type < OSPF_TYPE_MAX) {
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printf(" OSPFv%d-%s %d:",
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op->ospf_version,
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ospf_types[op->ospf_type],
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length);
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} else {
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printf(" ospf-v%d-??type %d?? %d:",
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op->ospf_version,
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op->ospf_type,
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length);
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return;
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}
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if (length != ntohs(op->ospf_len)) {
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printf(" ??len %d??",
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ntohs(op->ospf_len));
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goto trunc_test;
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}
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if ((caddr_t) (&op->ospf_routerid + 1) > end) {
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goto trunc_test;
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}
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/* Print the routerid if it is not the same as the source */
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if (ip->ip_src.s_addr != op->ospf_routerid.s_addr) {
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printf(" rtrid %s",
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ipaddr_string(&op->ospf_routerid));
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}
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if ((caddr_t) (&op->ospf_areaid + 1) > end) {
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goto trunc_test;
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}
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if (op->ospf_areaid.s_addr) {
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printf(" area %s",
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ipaddr_string(&op->ospf_areaid));
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} else {
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printf(" backbone");
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}
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if ((caddr_t) (op->ospf_authdata + OSPF_AUTH_SIZE) > end) {
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goto trunc_test;
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}
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if (vflag) {
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/* Print authentication data (should we really do this?) */
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switch (ntohs(op->ospf_authtype)) {
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case OSPF_AUTH_NONE:
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break;
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case OSPF_AUTH_SIMPLE:
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printf(" auth ");
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j = 0;
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for (i = 0; i < sizeof (op->ospf_authdata); i++) {
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if (!isprint(op->ospf_authdata[i])) {
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j = 1;
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break;
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}
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}
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if (j) {
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/* Print the auth-data as a string of octets */
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printf("%s.%s",
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ipaddr_string((struct in_addr *) op->ospf_authdata),
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ipaddr_string((struct in_addr *) &op->ospf_authdata[sizeof (struct in_addr)]));
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} else {
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/* Print the auth-data as a text string */
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printf("'%.8s'",
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op->ospf_authdata);
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}
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break;
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default:
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printf(" ??authtype-%d??",
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ntohs(op->ospf_authtype));
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return;
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}
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}
|
|
|
|
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/* Do rest according to version. */
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switch (op->ospf_version) {
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case 2:
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/* ospf version 2 */
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switch (op->ospf_type) {
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case OSPF_TYPE_UMD: /* Rob Coltun's special monitoring packets; do nothing */
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break;
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case OSPF_TYPE_HELLO:
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if ((caddr_t) (&op->ospf_hello.hello_deadint + 1) > end) {
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break;
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}
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if (vflag) {
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ospf_print_bits(ospf_option_bits, op->ospf_hello.hello_options);
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printf(" mask %s int %d pri %d dead %u",
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ipaddr_string(&op->ospf_hello.hello_mask),
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ntohs(op->ospf_hello.hello_helloint),
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op->ospf_hello.hello_priority,
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(u_int32_t)ntohl(op->ospf_hello.hello_deadint));
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}
|
|
|
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if ((caddr_t) (&op->ospf_hello.hello_dr + 1) > end) {
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break;
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}
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if (op->ospf_hello.hello_dr.s_addr) {
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printf(" dr %s",
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ipaddr_string(&op->ospf_hello.hello_dr));
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}
|
|
|
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if ((caddr_t) (&op->ospf_hello.hello_bdr + 1) > end) {
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break;
|
|
}
|
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if (op->ospf_hello.hello_bdr.s_addr) {
|
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printf(" bdr %s",
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ipaddr_string(&op->ospf_hello.hello_bdr));
|
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}
|
|
|
|
if (vflag) {
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if ((caddr_t) (op->ospf_hello.hello_neighbor + 1) > end) {
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break;
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|
}
|
|
printf(" nbrs");
|
|
for (ap = op->ospf_hello.hello_neighbor;
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(caddr_t) (ap + 1) <= end;
|
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ap++) {
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printf(" %s",
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ipaddr_string(ap));
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}
|
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}
|
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break; /* HELLO */
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|
|
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case OSPF_TYPE_DB:
|
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if ((caddr_t) (&op->ospf_db.db_seq + 1) > end) {
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break;
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}
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ospf_print_bits(ospf_option_bits, op->ospf_db.db_options);
|
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sep = ' ';
|
|
if (op->ospf_db.db_flags & OSPF_DB_INIT) {
|
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printf("%cI",
|
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sep);
|
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sep = '/';
|
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}
|
|
if (op->ospf_db.db_flags & OSPF_DB_MORE) {
|
|
printf("%cM",
|
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sep);
|
|
sep = '/';
|
|
}
|
|
if (op->ospf_db.db_flags & OSPF_DB_MASTER) {
|
|
printf("%cMS",
|
|
sep);
|
|
sep = '/';
|
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}
|
|
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, end)) {
|
|
printf(" }"); /* { (ctags) */
|
|
lshp++;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case OSPF_TYPE_LSR:
|
|
if (vflag) {
|
|
for (lsrp = op->ospf_lsr; (caddr_t) (lsrp+1) <= end; lsrp++) {
|
|
int32_t type;
|
|
|
|
if ((caddr_t) (lsrp + 1) > end) {
|
|
break;
|
|
}
|
|
|
|
printf(" {"); /* } (ctags) */
|
|
if (!(type = ntohl(lsrp->ls_type)) || type >= LS_TYPE_MAX) {
|
|
printf(" ??LinkStateType %d }", type); /* { (ctags) */
|
|
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 */
|
|
}
|