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-rw-r--r--print-ospf.c1157
1 files changed, 1157 insertions, 0 deletions
diff --git a/print-ospf.c b/print-ospf.c
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--- /dev/null
+++ b/print-ospf.c
@@ -0,0 +1,1157 @@
+/*
+ * 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[] _U_ =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-ospf.c,v 1.66 2007-10-08 07:53:21 hannes Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+
+#include "interface.h"
+#include "addrtoname.h"
+#include "extract.h"
+#include "gmpls.h"
+
+#include "ospf.h"
+
+#include "ip.h"
+
+static struct tok ospf_option_values[] = {
+ { OSPF_OPTION_T, "MultiTopology" }, /* draft-ietf-ospf-mt-09 */
+ { OSPF_OPTION_E, "External" },
+ { OSPF_OPTION_MC, "Multicast" },
+ { OSPF_OPTION_NP, "NSSA" },
+ { OSPF_OPTION_L, "LLS" },
+ { OSPF_OPTION_DC, "Demand Circuit" },
+ { OSPF_OPTION_O, "Opaque" },
+ { OSPF_OPTION_DN, "Up/Down" },
+ { 0, NULL }
+};
+
+static struct tok ospf_authtype_values[] = {
+ { OSPF_AUTH_NONE, "none" },
+ { OSPF_AUTH_SIMPLE, "simple" },
+ { OSPF_AUTH_MD5, "MD5" },
+ { 0, NULL }
+};
+
+static struct tok ospf_rla_flag_values[] = {
+ { RLA_FLAG_B, "ABR" },
+ { RLA_FLAG_E, "ASBR" },
+ { RLA_FLAG_W1, "Virtual" },
+ { RLA_FLAG_W2, "W2" },
+ { 0, NULL }
+};
+
+static struct tok type2str[] = {
+ { OSPF_TYPE_UMD, "UMD" },
+ { OSPF_TYPE_HELLO, "Hello" },
+ { OSPF_TYPE_DD, "Database Description" },
+ { OSPF_TYPE_LS_REQ, "LS-Request" },
+ { OSPF_TYPE_LS_UPDATE, "LS-Update" },
+ { OSPF_TYPE_LS_ACK, "LS-Ack" },
+ { 0, NULL }
+};
+
+static struct tok lsa_values[] = {
+ { LS_TYPE_ROUTER, "Router" },
+ { LS_TYPE_NETWORK, "Network" },
+ { LS_TYPE_SUM_IP, "Summary" },
+ { LS_TYPE_SUM_ABR, "ASBR Summary" },
+ { LS_TYPE_ASE, "External" },
+ { LS_TYPE_GROUP, "Multicast Group" },
+ { LS_TYPE_NSSA, "NSSA" },
+ { LS_TYPE_OPAQUE_LL, "Link Local Opaque" },
+ { LS_TYPE_OPAQUE_AL, "Area Local Opaque" },
+ { LS_TYPE_OPAQUE_DW, "Domain Wide Opaque" },
+ { 0, NULL }
+};
+
+static struct tok ospf_dd_flag_values[] = {
+ { OSPF_DB_INIT, "Init" },
+ { OSPF_DB_MORE, "More" },
+ { OSPF_DB_MASTER, "Master" },
+ { OSPF_DB_RESYNC, "OOBResync" },
+ { 0, NULL }
+};
+
+static struct tok lsa_opaque_values[] = {
+ { LS_OPAQUE_TYPE_TE, "Traffic Engineering" },
+ { LS_OPAQUE_TYPE_GRACE, "Graceful restart" },
+ { LS_OPAQUE_TYPE_RI, "Router Information" },
+ { 0, NULL }
+};
+
+static struct tok lsa_opaque_te_tlv_values[] = {
+ { LS_OPAQUE_TE_TLV_ROUTER, "Router Address" },
+ { LS_OPAQUE_TE_TLV_LINK, "Link" },
+ { 0, NULL }
+};
+
+static struct tok lsa_opaque_te_link_tlv_subtlv_values[] = {
+ { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE, "Link Type" },
+ { LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID, "Link ID" },
+ { LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP, "Local Interface IP address" },
+ { LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP, "Remote Interface IP address" },
+ { LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC, "Traffic Engineering Metric" },
+ { LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW, "Maximum Bandwidth" },
+ { LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW, "Maximum Reservable Bandwidth" },
+ { LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW, "Unreserved Bandwidth" },
+ { LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP, "Administrative Group" },
+ { LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" },
+ { LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE, "Link Protection Type" },
+ { LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR, "Interface Switching Capability" },
+ { LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP, "Shared Risk Link Group" },
+ { LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS, "Bandwidth Constraints" },
+ { 0, NULL }
+};
+
+static struct tok lsa_opaque_grace_tlv_values[] = {
+ { LS_OPAQUE_GRACE_TLV_PERIOD, "Grace Period" },
+ { LS_OPAQUE_GRACE_TLV_REASON, "Graceful restart Reason" },
+ { LS_OPAQUE_GRACE_TLV_INT_ADDRESS, "IPv4 interface address" },
+ { 0, NULL }
+};
+
+static struct tok lsa_opaque_grace_tlv_reason_values[] = {
+ { LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN, "Unknown" },
+ { LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART, "Software Restart" },
+ { LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE, "Software Reload/Upgrade" },
+ { LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH, "Control Processor Switch" },
+ { 0, NULL }
+};
+
+static struct tok lsa_opaque_te_tlv_link_type_sub_tlv_values[] = {
+ { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP, "Point-to-point" },
+ { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA, "Multi-Access" },
+ { 0, NULL }
+};
+
+static struct tok lsa_opaque_ri_tlv_values[] = {
+ { LS_OPAQUE_RI_TLV_CAP, "Router Capabilities" },
+ { 0, NULL }
+};
+
+static struct tok lsa_opaque_ri_tlv_cap_values[] = {
+ { 1, "Reserved" },
+ { 2, "Reserved" },
+ { 4, "Reserved" },
+ { 8, "Reserved" },
+ { 16, "graceful restart capable" },
+ { 32, "graceful restart helper" },
+ { 64, "Stub router support" },
+ { 128, "Traffic engineering" },
+ { 256, "p2p over LAN" },
+ { 512, "path computation server" },
+ { 0, NULL }
+};
+
+static struct tok ospf_lls_tlv_values[] = {
+ { OSPF_LLS_EO, "Extended Options" },
+ { OSPF_LLS_MD5, "MD5 Authentication" },
+ { 0, NULL }
+};
+
+static struct tok ospf_lls_eo_options[] = {
+ { OSPF_LLS_EO_LR, "LSDB resync" },
+ { OSPF_LLS_EO_RS, "Restart" },
+ { 0, NULL }
+};
+
+static char tstr[] = " [|ospf2]";
+
+#ifdef WIN32
+#define inline __inline
+#endif /* WIN32 */
+
+static int ospf_print_lshdr(const struct lsa_hdr *);
+static const u_char *ospf_print_lsa(const struct lsa *);
+static int ospf_decode_v2(const struct ospfhdr *, const u_char *);
+static int ospf_decode_lls(const struct ospfhdr *, register u_int);
+
+int
+ospf_print_grace_lsa (const u_int8_t *tptr, u_int ls_length) {
+
+ u_int tlv_type, tlv_length;
+
+
+ while (ls_length > 0) {
+ TCHECK2(*tptr, 4);
+ if (ls_length < 4) {
+ printf("\n\t Remaining LS length %u < 4", ls_length);
+ return -1;
+ }
+ tlv_type = EXTRACT_16BITS(tptr);
+ tlv_length = EXTRACT_16BITS(tptr+2);
+ tptr+=4;
+ ls_length-=4;
+
+ printf("\n\t %s TLV (%u), length %u, value: ",
+ tok2str(lsa_opaque_grace_tlv_values,"unknown",tlv_type),
+ tlv_type,
+ tlv_length);
+
+ if (tlv_length > ls_length) {
+ printf("\n\t Bogus length %u > %u", tlv_length,
+ ls_length);
+ return -1;
+ }
+
+ /* Infinite loop protection. */
+ if (tlv_type == 0 || tlv_length ==0) {
+ return -1;
+ }
+
+ TCHECK2(*tptr, tlv_length);
+ switch(tlv_type) {
+
+ case LS_OPAQUE_GRACE_TLV_PERIOD:
+ if (tlv_length != 4) {
+ printf("\n\t Bogus length %u != 4", tlv_length);
+ return -1;
+ }
+ printf("%us",EXTRACT_32BITS(tptr));
+ break;
+
+ case LS_OPAQUE_GRACE_TLV_REASON:
+ if (tlv_length != 1) {
+ printf("\n\t Bogus length %u != 1", tlv_length);
+ return -1;
+ }
+ printf("%s (%u)",
+ tok2str(lsa_opaque_grace_tlv_reason_values, "Unknown", *tptr),
+ *tptr);
+ break;
+
+ case LS_OPAQUE_GRACE_TLV_INT_ADDRESS:
+ if (tlv_length != 4) {
+ printf("\n\t Bogus length %u != 4", tlv_length);
+ return -1;
+ }
+ printf("%s", ipaddr_string(tptr));
+ break;
+
+ default:
+ if (vflag <= 1) {
+ if(!print_unknown_data(tptr,"\n\t ",tlv_length))
+ return -1;
+ }
+ break;
+
+ }
+ /* in OSPF everything has to be 32-bit aligned, including TLVs */
+ if (tlv_length%4 != 0)
+ tlv_length+=4-(tlv_length%4);
+ ls_length-=tlv_length;
+ tptr+=tlv_length;
+ }
+
+ return 0;
+trunc:
+ return -1;
+}
+
+int
+ospf_print_te_lsa (const u_int8_t *tptr, u_int ls_length) {
+
+ u_int tlv_type, tlv_length, subtlv_type, subtlv_length;
+ u_int priority_level, te_class, count_srlg;
+ union { /* int to float conversion buffer for several subTLVs */
+ float f;
+ u_int32_t i;
+ } bw;
+
+ while (ls_length != 0) {
+ TCHECK2(*tptr, 4);
+ if (ls_length < 4) {
+ printf("\n\t Remaining LS length %u < 4", ls_length);
+ return -1;
+ }
+ tlv_type = EXTRACT_16BITS(tptr);
+ tlv_length = EXTRACT_16BITS(tptr+2);
+ tptr+=4;
+ ls_length-=4;
+
+ printf("\n\t %s TLV (%u), length: %u",
+ tok2str(lsa_opaque_te_tlv_values,"unknown",tlv_type),
+ tlv_type,
+ tlv_length);
+
+ if (tlv_length > ls_length) {
+ printf("\n\t Bogus length %u > %u", tlv_length,
+ ls_length);
+ return -1;
+ }
+
+ /* Infinite loop protection. */
+ if (tlv_type == 0 || tlv_length ==0) {
+ return -1;
+ }
+
+ switch(tlv_type) {
+ case LS_OPAQUE_TE_TLV_LINK:
+ while (tlv_length >= sizeof(subtlv_type) + sizeof(subtlv_length)) {
+ if (tlv_length < 4) {
+ printf("\n\t Remaining TLV length %u < 4",
+ tlv_length);
+ return -1;
+ }
+ TCHECK2(*tptr, 4);
+ subtlv_type = EXTRACT_16BITS(tptr);
+ subtlv_length = EXTRACT_16BITS(tptr+2);
+ tptr+=4;
+ tlv_length-=4;
+
+ printf("\n\t %s subTLV (%u), length: %u",
+ tok2str(lsa_opaque_te_link_tlv_subtlv_values,"unknown",subtlv_type),
+ subtlv_type,
+ subtlv_length);
+
+ TCHECK2(*tptr, subtlv_length);
+ switch(subtlv_type) {
+ case LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP:
+ printf(", 0x%08x", EXTRACT_32BITS(tptr));
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID:
+ case LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID:
+ printf(", %s (0x%08x)",
+ ipaddr_string(tptr),
+ EXTRACT_32BITS(tptr));
+ if (subtlv_length == 8) /* rfc4203 */
+ printf(", %s (0x%08x)",
+ ipaddr_string(tptr+4),
+ EXTRACT_32BITS(tptr+4));
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP:
+ case LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP:
+ printf(", %s", ipaddr_string(tptr));
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW:
+ case LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW:
+ bw.i = EXTRACT_32BITS(tptr);
+ printf(", %.3f Mbps", bw.f*8/1000000 );
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW:
+ for (te_class = 0; te_class < 8; te_class++) {
+ bw.i = EXTRACT_32BITS(tptr+te_class*4);
+ printf("\n\t\tTE-Class %u: %.3f Mbps",
+ te_class,
+ bw.f*8/1000000 );
+ }
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS:
+ printf("\n\t\tBandwidth Constraints Model ID: %s (%u)",
+ tok2str(diffserv_te_bc_values, "unknown", *tptr),
+ *tptr);
+ /* decode BCs until the subTLV ends */
+ for (te_class = 0; te_class < (subtlv_length-4)/4; te_class++) {
+ bw.i = EXTRACT_32BITS(tptr+4+te_class*4);
+ printf("\n\t\t Bandwidth constraint CT%u: %.3f Mbps",
+ te_class,
+ bw.f*8/1000000 );
+ }
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC:
+ printf(", Metric %u", EXTRACT_32BITS(tptr));
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE:
+ printf(", %s, Priority %u",
+ bittok2str(gmpls_link_prot_values, "none", *tptr),
+ *(tptr+1));
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR:
+ printf("\n\t\tInterface Switching Capability: %s",
+ tok2str(gmpls_switch_cap_values, "Unknown", *(tptr)));
+ printf("\n\t\tLSP Encoding: %s\n\t\tMax LSP Bandwidth:",
+ tok2str(gmpls_encoding_values, "Unknown", *(tptr+1)));
+ for (priority_level = 0; priority_level < 8; priority_level++) {
+ bw.i = EXTRACT_32BITS(tptr+4+(priority_level*4));
+ printf("\n\t\t priority level %d: %.3f Mbps",
+ priority_level,
+ bw.f*8/1000000 );
+ }
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE:
+ printf(", %s (%u)",
+ tok2str(lsa_opaque_te_tlv_link_type_sub_tlv_values,"unknown",*tptr),
+ *tptr);
+ break;
+
+ case LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP:
+ count_srlg = subtlv_length / 4;
+ if (count_srlg != 0)
+ printf("\n\t\t Shared risk group: ");
+ while (count_srlg > 0) {
+ bw.i = EXTRACT_32BITS(tptr);
+ printf("%d",bw.i);
+ tptr+=4;
+ count_srlg--;
+ if (count_srlg > 0)
+ printf(", ");
+ }
+ break;
+
+ default:
+ if (vflag <= 1) {
+ if(!print_unknown_data(tptr,"\n\t\t",subtlv_length))
+ return -1;
+ }
+ break;
+ }
+ /* in OSPF everything has to be 32-bit aligned, including subTLVs */
+ if (subtlv_length%4 != 0)
+ subtlv_length+=4-(subtlv_length%4);
+
+ tlv_length-=subtlv_length;
+ tptr+=subtlv_length;
+
+ }
+ break;
+
+ case LS_OPAQUE_TE_TLV_ROUTER:
+ if (tlv_length < 4) {
+ printf("\n\t TLV length %u < 4", tlv_length);
+ return -1;
+ }
+ TCHECK2(*tptr, 4);
+ printf(", %s", ipaddr_string(tptr));
+ break;
+
+ default:
+ if (vflag <= 1) {
+ if(!print_unknown_data(tptr,"\n\t ",tlv_length))
+ return -1;
+ }
+ break;
+ }
+ /* in OSPF everything has to be 32-bit aligned, including TLVs */
+ if (tlv_length%4 != 0)
+ tlv_length+=4-(tlv_length%4);
+ ls_length-=tlv_length;
+ tptr+=tlv_length;
+ }
+ return 0;
+trunc:
+ return -1;
+}
+
+
+static int
+ospf_print_lshdr(register const struct lsa_hdr *lshp)
+{
+ u_int ls_length;
+
+ TCHECK(lshp->ls_length);
+ ls_length = EXTRACT_16BITS(&lshp->ls_length);
+ if (ls_length < sizeof(struct lsa_hdr)) {
+ printf("\n\t Bogus length %u < header (%lu)", ls_length,
+ (unsigned long)sizeof(struct lsa_hdr));
+ return(-1);
+ }
+
+ TCHECK(lshp->ls_seq); /* XXX - ls_length check checked this */
+ printf("\n\t Advertising Router %s, seq 0x%08x, age %us, length %u",
+ ipaddr_string(&lshp->ls_router),
+ EXTRACT_32BITS(&lshp->ls_seq),
+ EXTRACT_16BITS(&lshp->ls_age),
+ ls_length-(u_int)sizeof(struct lsa_hdr));
+
+ TCHECK(lshp->ls_type); /* XXX - ls_length check checked this */
+ switch (lshp->ls_type) {
+ /* the LSA header for opaque LSAs was slightly changed */
+ case LS_TYPE_OPAQUE_LL:
+ case LS_TYPE_OPAQUE_AL:
+ case LS_TYPE_OPAQUE_DW:
+ printf("\n\t %s LSA (%d), Opaque-Type %s LSA (%u), Opaque-ID %u",
+ tok2str(lsa_values,"unknown",lshp->ls_type),
+ lshp->ls_type,
+
+ tok2str(lsa_opaque_values,
+ "unknown",
+ *(&lshp->un_lsa_id.opaque_field.opaque_type)),
+ *(&lshp->un_lsa_id.opaque_field.opaque_type),
+ EXTRACT_24BITS(&lshp->un_lsa_id.opaque_field.opaque_id)
+
+ );
+ break;
+
+ /* all other LSA types use regular style LSA headers */
+ default:
+ printf("\n\t %s LSA (%d), LSA-ID: %s",
+ tok2str(lsa_values,"unknown",lshp->ls_type),
+ lshp->ls_type,
+ ipaddr_string(&lshp->un_lsa_id.lsa_id));
+ break;
+ }
+
+ TCHECK(lshp->ls_options); /* XXX - ls_length check checked this */
+ printf("\n\t Options: [%s]", bittok2str(ospf_option_values,"none",lshp->ls_options));
+
+ return (ls_length);
+trunc:
+ return (-1);
+}
+
+/* draft-ietf-ospf-mt-09 */
+static struct tok ospf_topology_values[] = {
+ { 0, "default " },
+ { 1, "multicast " },
+ { 2, "management " },
+ { 0, NULL }
+};
+
+/*
+ * Print all the per-topology metrics.
+ */
+static void
+ospf_print_tos_metrics(const union un_tos *tos)
+{
+ int metric_count;
+ int toscount;
+
+ toscount = tos->link.link_tos_count+1;
+ metric_count = 0;
+
+ /*
+ * All but the first metric contain a valid topology id.
+ */
+ while (toscount) {
+ printf("\n\t\ttopology %s(%u), metric %u",
+ tok2str(ospf_topology_values, "",
+ metric_count ? tos->metrics.tos_type : 0),
+ metric_count ? tos->metrics.tos_type : 0,
+ EXTRACT_16BITS(&tos->metrics.tos_metric));
+ metric_count++;
+ tos++;
+ toscount--;
+ }
+}
+
+/*
+ * Print a single link state advertisement. If truncated or if LSA length
+ * field is less than the length of the LSA header, return NULl, else
+ * return pointer to data past end of LSA.
+ */
+static const u_int8_t *
+ospf_print_lsa(register const struct lsa *lsap)
+{
+ register const u_int8_t *ls_end;
+ register const struct rlalink *rlp;
+ 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, tlv_type, tlv_length, topology;
+ register int ls_length;
+ const u_int8_t *tptr;
+
+ tptr = (u_int8_t *)lsap->lsa_un.un_unknown; /* squelch compiler warnings */
+ ls_length = ospf_print_lshdr(&lsap->ls_hdr);
+ if (ls_length == -1)
+ return(NULL);
+ ls_end = (u_int8_t *)lsap + ls_length;
+ ls_length -= sizeof(struct lsa_hdr);
+
+ switch (lsap->ls_hdr.ls_type) {
+
+ case LS_TYPE_ROUTER:
+ TCHECK(lsap->lsa_un.un_rla.rla_flags);
+ printf("\n\t Router LSA Options: [%s]", bittok2str(ospf_rla_flag_values,"none",lsap->lsa_un.un_rla.rla_flags));
+
+ TCHECK(lsap->lsa_un.un_rla.rla_count);
+ j = EXTRACT_16BITS(&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);
+ switch (rlp->un_tos.link.link_type) {
+
+ case RLA_TYPE_VIRTUAL:
+ printf("\n\t Virtual Link: Neighbor Router-ID: %s, Interface Address: %s",
+ ipaddr_string(&rlp->link_id),
+ ipaddr_string(&rlp->link_data));
+ break;
+
+ case RLA_TYPE_ROUTER:
+ printf("\n\t Neighbor Router-ID: %s, Interface Address: %s",
+ ipaddr_string(&rlp->link_id),
+ ipaddr_string(&rlp->link_data));
+ break;
+
+ case RLA_TYPE_TRANSIT:
+ printf("\n\t Neighbor Network-ID: %s, Interface Address: %s",
+ ipaddr_string(&rlp->link_id),
+ ipaddr_string(&rlp->link_data));
+ break;
+
+ case RLA_TYPE_STUB:
+ printf("\n\t Stub Network: %s, Mask: %s",
+ ipaddr_string(&rlp->link_id),
+ ipaddr_string(&rlp->link_data));
+ break;
+
+ default:
+ printf("\n\t Unknown Router Link Type (%u)",
+ rlp->un_tos.link.link_type);
+ return (ls_end);
+ }
+
+ ospf_print_tos_metrics(&rlp->un_tos);
+
+ rlp = (struct rlalink *)((u_char *)(rlp + 1) +
+ ((rlp->un_tos.link.link_tos_count) * sizeof(union un_tos)));
+ }
+ break;
+
+ case LS_TYPE_NETWORK:
+ TCHECK(lsap->lsa_un.un_nla.nla_mask);
+ printf("\n\t Mask %s\n\t Connected Routers:",
+ 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("\n\t %s", ipaddr_string(ap));
+ ++ap;
+ }
+ break;
+
+ case LS_TYPE_SUM_IP:
+ TCHECK(lsap->lsa_un.un_nla.nla_mask);
+ printf("\n\t Mask %s",
+ ipaddr_string(&lsap->lsa_un.un_sla.sla_mask));
+ 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 = EXTRACT_32BITS(lp);
+ topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS;
+ printf("\n\t\ttopology %s(%u) metric %d",
+ tok2str(ospf_topology_values, "", topology),
+ topology,
+ ul & SLA_MASK_METRIC);
+ ++lp;
+ }
+ break;
+
+ 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 = EXTRACT_32BITS(lp);
+ topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS;
+ printf("\n\t\ttopology %s(%u) metric %d",
+ tok2str(ospf_topology_values, "", topology),
+ topology,
+ ul & SLA_MASK_METRIC);
+ ++lp;
+ }
+ break;
+
+ case LS_TYPE_ASE:
+ case LS_TYPE_NSSA: /* fall through - those LSAs share the same format */
+ TCHECK(lsap->lsa_un.un_nla.nla_mask);
+ printf("\n\t 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 = EXTRACT_32BITS(&almp->asla_tosmetric);
+ topology = ((ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS);
+ printf("\n\t\ttopology %s(%u), type %d, metric",
+ tok2str(ospf_topology_values, "", topology),
+ topology,
+ (ul & ASLA_FLAG_EXTERNAL) ? 2 : 1);
+ if ((ul & ASLA_MASK_METRIC)==0xffffff)
+ printf(" infinite");
+ else
+ printf(" %d", (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 (EXTRACT_32BITS(&mcp->mcla_vtype)) {
+
+ case MCLA_VERTEX_ROUTER:
+ printf("\n\t Router Router-ID %s",
+ ipaddr_string(&mcp->mcla_vid));
+ break;
+
+ case MCLA_VERTEX_NETWORK:
+ printf("\n\t Network Designated Router %s",
+ ipaddr_string(&mcp->mcla_vid));
+ break;
+
+ default:
+ printf("\n\t unknown VertexType (%u)",
+ EXTRACT_32BITS(&mcp->mcla_vtype));
+ break;
+ }
+ ++mcp;
+ }
+ break;
+
+ case LS_TYPE_OPAQUE_LL: /* fall through */
+ case LS_TYPE_OPAQUE_AL:
+ case LS_TYPE_OPAQUE_DW:
+
+ switch (*(&lsap->ls_hdr.un_lsa_id.opaque_field.opaque_type)) {
+ case LS_OPAQUE_TYPE_RI:
+ tptr = (u_int8_t *)(&lsap->lsa_un.un_ri_tlv.type);
+
+ while (ls_length != 0) {
+ TCHECK2(*tptr, 4);
+ if (ls_length < 4) {
+ printf("\n\t Remaining LS length %u < 4", ls_length);
+ return(ls_end);
+ }
+ tlv_type = EXTRACT_16BITS(tptr);
+ tlv_length = EXTRACT_16BITS(tptr+2);
+ tptr+=4;
+ ls_length-=4;
+
+ printf("\n\t %s TLV (%u), length: %u, value: ",
+ tok2str(lsa_opaque_ri_tlv_values,"unknown",tlv_type),
+ tlv_type,
+ tlv_length);
+
+ if (tlv_length > ls_length) {
+ printf("\n\t Bogus length %u > %u", tlv_length,
+ ls_length);
+ return(ls_end);
+ }
+ TCHECK2(*tptr, tlv_length);
+ switch(tlv_type) {
+
+ case LS_OPAQUE_RI_TLV_CAP:
+ if (tlv_length != 4) {
+ printf("\n\t Bogus length %u != 4", tlv_length);
+ return(ls_end);
+ }
+ printf("Capabilities: %s",
+ bittok2str(lsa_opaque_ri_tlv_cap_values, "Unknown", EXTRACT_32BITS(tptr)));
+ break;
+ default:
+ if (vflag <= 1) {
+ if(!print_unknown_data(tptr,"\n\t ",tlv_length))
+ return(ls_end);
+ }
+ break;
+
+ }
+ tptr+=tlv_length;
+ ls_length-=tlv_length;
+ }
+ break;
+
+ case LS_OPAQUE_TYPE_GRACE:
+ if (ospf_print_grace_lsa((u_int8_t *)(&lsap->lsa_un.un_grace_tlv.type),
+ ls_length) == -1) {
+ return(ls_end);
+ }
+ break;
+
+ case LS_OPAQUE_TYPE_TE:
+ if (ospf_print_te_lsa((u_int8_t *)(&lsap->lsa_un.un_te_lsa_tlv.type),
+ ls_length) == -1) {
+ return(ls_end);
+ }
+ break;
+
+ default:
+ if (vflag <= 1) {
+ if(!print_unknown_data((u_int8_t *)lsap->lsa_un.un_unknown,
+ "\n\t ", ls_length))
+ return(ls_end);
+ }
+ break;
+ }
+ }
+
+ /* do we want to see an additionally hexdump ? */
+ if (vflag> 1)
+ if(!print_unknown_data((u_int8_t *)lsap->lsa_un.un_unknown,
+ "\n\t ", ls_length)) {
+ return(ls_end);
+ }
+
+ return (ls_end);
+trunc:
+ return (NULL);
+}
+
+static int
+ospf_decode_lls(register const struct ospfhdr *op,
+ register u_int length)
+{
+ register const u_char *dptr;
+ register const u_char *dataend;
+ register u_int length2;
+ register u_int16_t lls_type, lls_len;
+ register u_int32_t lls_flags;
+
+ switch (op->ospf_type) {
+
+ case OSPF_TYPE_HELLO:
+ if (!(op->ospf_hello.hello_options & OSPF_OPTION_L))
+ return (0);
+ break;
+
+ case OSPF_TYPE_DD:
+ if (!(op->ospf_db.db_options & OSPF_OPTION_L))
+ return (0);
+ break;
+
+ default:
+ return (0);
+ }
+
+ /* dig deeper if LLS data is available; see RFC4813 */
+ length2 = EXTRACT_16BITS(&op->ospf_len);
+ dptr = (u_char *)op + length2;
+ dataend = (u_char *)op + length;
+
+ if (EXTRACT_16BITS(&op->ospf_authtype) == OSPF_AUTH_MD5) {
+ dptr = dptr + op->ospf_authdata[3];
+ length2 += op->ospf_authdata[3];
+ }
+ if (length2 >= length) {
+ printf("\n\t[LLS truncated]");
+ return (1);
+ }
+ TCHECK2(*dptr, 2);
+ printf("\n\t LLS: checksum: 0x%04x", (u_int)EXTRACT_16BITS(dptr));
+
+ dptr += 2;
+ TCHECK2(*dptr, 2);
+ length2 = EXTRACT_16BITS(dptr);
+ printf(", length: %u", length2);
+
+ dptr += 2;
+ TCHECK(*dptr);
+ while (dptr < dataend) {
+ TCHECK2(*dptr, 2);
+ lls_type = EXTRACT_16BITS(dptr);
+ printf("\n\t %s (%u)",
+ tok2str(ospf_lls_tlv_values,"Unknown TLV",lls_type),
+ lls_type);
+ dptr += 2;
+ TCHECK2(*dptr, 2);
+ lls_len = EXTRACT_16BITS(dptr);
+ printf(", length: %u", lls_len);
+ dptr += 2;
+ switch (lls_type) {
+
+ case OSPF_LLS_EO:
+ if (lls_len != 4) {
+ printf(" [should be 4]");
+ lls_len = 4;
+ }
+ TCHECK2(*dptr, 4);
+ lls_flags = EXTRACT_32BITS(dptr);
+ printf("\n\t Options: 0x%08x [%s]", lls_flags,
+ bittok2str(ospf_lls_eo_options,"?",lls_flags));
+
+ break;
+
+ case OSPF_LLS_MD5:
+ if (lls_len != 20) {
+ printf(" [should be 20]");
+ lls_len = 20;
+ }
+ TCHECK2(*dptr, 4);
+ printf("\n\t Sequence number: 0x%08x", EXTRACT_32BITS(dptr));
+ break;
+ }
+
+ dptr += lls_len;
+ }
+
+ return (0);
+trunc:
+ 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 u_int32_t lsa_count,lsa_count_max;
+
+ switch (op->ospf_type) {
+
+ case OSPF_TYPE_UMD:
+ /*
+ * Rob Coltun's special monitoring packets;
+ * do nothing
+ */
+ break;
+
+ case OSPF_TYPE_HELLO:
+ printf("\n\tOptions [%s]",
+ bittok2str(ospf_option_values,"none",op->ospf_hello.hello_options));
+
+ TCHECK(op->ospf_hello.hello_deadint);
+ printf("\n\t Hello Timer %us, Dead Timer %us, Mask %s, Priority %u",
+ EXTRACT_16BITS(&op->ospf_hello.hello_helloint),
+ EXTRACT_32BITS(&op->ospf_hello.hello_deadint),
+ ipaddr_string(&op->ospf_hello.hello_mask),
+ op->ospf_hello.hello_priority);
+
+ TCHECK(op->ospf_hello.hello_dr);
+ if (op->ospf_hello.hello_dr.s_addr != 0)
+ printf("\n\t Designated Router %s",
+ ipaddr_string(&op->ospf_hello.hello_dr));
+
+ TCHECK(op->ospf_hello.hello_bdr);
+ if (op->ospf_hello.hello_bdr.s_addr != 0)
+ printf(", Backup Designated Router %s",
+ ipaddr_string(&op->ospf_hello.hello_bdr));
+
+ ap = op->ospf_hello.hello_neighbor;
+ if ((u_char *)ap < dataend)
+ printf("\n\t Neighbor List:");
+ while ((u_char *)ap < dataend) {
+ TCHECK(*ap);
+ printf("\n\t %s", ipaddr_string(ap));
+ ++ap;
+ }
+ break; /* HELLO */
+
+ case OSPF_TYPE_DD:
+ TCHECK(op->ospf_db.db_options);
+ printf("\n\tOptions [%s]",
+ bittok2str(ospf_option_values,"none",op->ospf_db.db_options));
+ TCHECK(op->ospf_db.db_flags);
+ printf(", DD Flags [%s]",
+ bittok2str(ospf_dd_flag_values,"none",op->ospf_db.db_flags));
+ TCHECK(op->ospf_db.db_ifmtu);
+ if (op->ospf_db.db_ifmtu) {
+ printf(", MTU: %u", EXTRACT_16BITS(&op->ospf_db.db_ifmtu));
+ }
+ TCHECK(op->ospf_db.db_seq);
+ printf(", Sequence: 0x%08x", EXTRACT_32BITS(&op->ospf_db.db_seq));
+
+ /* Print all the LS adv's */
+ lshp = op->ospf_db.db_lshdr;
+ while (((u_char *)lshp < dataend) && ospf_print_lshdr(lshp) != -1) {
+ ++lshp;
+ }
+ break;
+
+ case OSPF_TYPE_LS_REQ:
+ lsrp = op->ospf_lsr;
+ while ((u_char *)lsrp < dataend) {
+ TCHECK(*lsrp);
+
+ printf("\n\t Advertising Router: %s, %s LSA (%u)",
+ ipaddr_string(&lsrp->ls_router),
+ tok2str(lsa_values,"unknown",EXTRACT_32BITS(lsrp->ls_type)),
+ EXTRACT_32BITS(&lsrp->ls_type));
+
+ switch (EXTRACT_32BITS(lsrp->ls_type)) {
+ /* the LSA header for opaque LSAs was slightly changed */
+ case LS_TYPE_OPAQUE_LL:
+ case LS_TYPE_OPAQUE_AL:
+ case LS_TYPE_OPAQUE_DW:
+ printf(", Opaque-Type: %s LSA (%u), Opaque-ID: %u",
+ tok2str(lsa_opaque_values, "unknown",lsrp->un_ls_stateid.opaque_field.opaque_type),
+ lsrp->un_ls_stateid.opaque_field.opaque_type,
+ EXTRACT_24BITS(&lsrp->un_ls_stateid.opaque_field.opaque_id));
+ break;
+ default:
+ printf(", LSA-ID: %s",
+ ipaddr_string(&lsrp->un_ls_stateid.ls_stateid));
+ break;
+ }
+
+ ++lsrp;
+ }
+ break;
+
+ case OSPF_TYPE_LS_UPDATE:
+ lsap = op->ospf_lsu.lsu_lsa;
+ TCHECK(op->ospf_lsu.lsu_count);
+ lsa_count_max = EXTRACT_32BITS(&op->ospf_lsu.lsu_count);
+ printf(", %d LSA%s",lsa_count_max, PLURAL_SUFFIX(lsa_count_max));
+ for (lsa_count=1;lsa_count <= lsa_count_max;lsa_count++) {
+ printf("\n\t LSA #%u",lsa_count);
+ lsap = (const struct lsa *)ospf_print_lsa(lsap);
+ if (lsap == NULL)
+ goto trunc;
+ }
+ break;
+
+ case OSPF_TYPE_LS_ACK:
+ lshp = op->ospf_lsa.lsa_lshdr;
+ while (ospf_print_lshdr(lshp) != -1) {
+ ++lshp;
+ }
+ break;
+
+ default:
+ break;
+ }
+ return (0);
+trunc:
+ return (1);
+}
+
+void
+ospf_print(register const u_char *bp, register u_int length,
+ const u_char *bp2 _U_)
+{
+ register const struct ospfhdr *op;
+ register const u_char *dataend;
+ register const char *cp;
+
+ op = (struct ospfhdr *)bp;
+
+ /* XXX Before we do anything else, strip off the MD5 trailer */
+ TCHECK(op->ospf_authtype);
+ if (EXTRACT_16BITS(&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, "unknown LS-type", op->ospf_type);
+ printf("OSPFv%u, %s, length %u",
+ op->ospf_version,
+ cp,
+ length);
+ if (*cp == 'u')
+ return;
+
+ if(!vflag) { /* non verbose - so lets bail out here */
+ return;
+ }
+
+ TCHECK(op->ospf_len);
+ if (length != EXTRACT_16BITS(&op->ospf_len)) {
+ printf(" [len %d]", EXTRACT_16BITS(&op->ospf_len));
+ }
+
+ if (length > EXTRACT_16BITS(&op->ospf_len)) {
+ dataend = bp + EXTRACT_16BITS(&op->ospf_len);
+ } else {
+ dataend = bp + length;
+ }
+
+ TCHECK(op->ospf_routerid);
+ printf("\n\tRouter-ID %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 Area");
+
+ if (vflag) {
+ /* Print authentication data (should we really do this?) */
+ TCHECK2(op->ospf_authdata[0], sizeof(op->ospf_authdata));
+
+ printf(", Authentication Type: %s (%u)",
+ tok2str(ospf_authtype_values,"unknown",EXTRACT_16BITS(&op->ospf_authtype)),
+ EXTRACT_16BITS(&op->ospf_authtype));
+
+ switch (EXTRACT_16BITS(&op->ospf_authtype)) {
+
+ case OSPF_AUTH_NONE:
+ break;
+
+ case OSPF_AUTH_SIMPLE:
+ printf("\n\tSimple text password: ");
+ safeputs((const char *)op->ospf_authdata, OSPF_AUTH_SIMPLE_LEN);
+ break;
+
+ case OSPF_AUTH_MD5:
+ printf("\n\tKey-ID: %u, Auth-Length: %u, Crypto Sequence Number: 0x%08x",
+ *((op->ospf_authdata)+2),
+ *((op->ospf_authdata)+3),
+ EXTRACT_32BITS((op->ospf_authdata)+4));
+ break;
+
+ default:
+ return;
+ }
+ }
+ /* Do rest according to version. */
+ switch (op->ospf_version) {
+
+ case 2:
+ /* ospf version 2 */
+ if (ospf_decode_v2(op, dataend))
+ goto trunc;
+ if (length > EXTRACT_16BITS(&op->ospf_len)) {
+ if (ospf_decode_lls(op, length))
+ goto trunc;
+ }
+ break;
+
+ default:
+ printf(" ospf [version %d]", op->ospf_version);
+ break;
+ } /* end switch on version */
+
+ return;
+trunc:
+ fputs(tstr, stdout);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 11:58:43 +0000