1142 lines
38 KiB
C
1142 lines
38 KiB
C
/*
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* Copyright (c) 1992, 1993, 1994, 1995, 1996, 1997
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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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#define NETDISSECT_REWORKED
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "extract.h"
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#include "gmpls.h"
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#include "ospf.h"
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static const char tstr[] = " [|ospf2]";
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static const struct tok ospf_option_values[] = {
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{ OSPF_OPTION_T, "MultiTopology" }, /* draft-ietf-ospf-mt-09 */
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{ OSPF_OPTION_E, "External" },
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{ OSPF_OPTION_MC, "Multicast" },
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{ OSPF_OPTION_NP, "NSSA" },
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{ OSPF_OPTION_L, "LLS" },
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{ OSPF_OPTION_DC, "Demand Circuit" },
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{ OSPF_OPTION_O, "Opaque" },
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{ OSPF_OPTION_DN, "Up/Down" },
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{ 0, NULL }
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};
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static const struct tok ospf_authtype_values[] = {
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{ OSPF_AUTH_NONE, "none" },
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{ OSPF_AUTH_SIMPLE, "simple" },
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{ OSPF_AUTH_MD5, "MD5" },
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{ 0, NULL }
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};
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static const struct tok ospf_rla_flag_values[] = {
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{ RLA_FLAG_B, "ABR" },
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{ RLA_FLAG_E, "ASBR" },
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{ RLA_FLAG_W1, "Virtual" },
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{ RLA_FLAG_W2, "W2" },
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{ 0, NULL }
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};
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static const struct tok type2str[] = {
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{ OSPF_TYPE_UMD, "UMD" },
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{ OSPF_TYPE_HELLO, "Hello" },
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{ OSPF_TYPE_DD, "Database Description" },
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{ OSPF_TYPE_LS_REQ, "LS-Request" },
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{ OSPF_TYPE_LS_UPDATE, "LS-Update" },
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{ OSPF_TYPE_LS_ACK, "LS-Ack" },
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{ 0, NULL }
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};
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static const struct tok lsa_values[] = {
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{ LS_TYPE_ROUTER, "Router" },
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{ LS_TYPE_NETWORK, "Network" },
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{ LS_TYPE_SUM_IP, "Summary" },
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{ LS_TYPE_SUM_ABR, "ASBR Summary" },
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{ LS_TYPE_ASE, "External" },
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{ LS_TYPE_GROUP, "Multicast Group" },
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{ LS_TYPE_NSSA, "NSSA" },
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{ LS_TYPE_OPAQUE_LL, "Link Local Opaque" },
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{ LS_TYPE_OPAQUE_AL, "Area Local Opaque" },
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{ LS_TYPE_OPAQUE_DW, "Domain Wide Opaque" },
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{ 0, NULL }
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};
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static const struct tok ospf_dd_flag_values[] = {
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{ OSPF_DB_INIT, "Init" },
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{ OSPF_DB_MORE, "More" },
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{ OSPF_DB_MASTER, "Master" },
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{ OSPF_DB_RESYNC, "OOBResync" },
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{ 0, NULL }
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};
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static const struct tok lsa_opaque_values[] = {
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{ LS_OPAQUE_TYPE_TE, "Traffic Engineering" },
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{ LS_OPAQUE_TYPE_GRACE, "Graceful restart" },
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{ LS_OPAQUE_TYPE_RI, "Router Information" },
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{ 0, NULL }
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};
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static const struct tok lsa_opaque_te_tlv_values[] = {
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{ LS_OPAQUE_TE_TLV_ROUTER, "Router Address" },
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{ LS_OPAQUE_TE_TLV_LINK, "Link" },
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{ 0, NULL }
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};
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static const struct tok lsa_opaque_te_link_tlv_subtlv_values[] = {
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{ LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE, "Link Type" },
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{ LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID, "Link ID" },
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{ LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP, "Local Interface IP address" },
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{ LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP, "Remote Interface IP address" },
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{ LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC, "Traffic Engineering Metric" },
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{ LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW, "Maximum Bandwidth" },
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{ LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW, "Maximum Reservable Bandwidth" },
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{ LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW, "Unreserved Bandwidth" },
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{ LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP, "Administrative Group" },
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{ LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" },
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{ LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE, "Link Protection Type" },
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{ LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR, "Interface Switching Capability" },
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{ LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP, "Shared Risk Link Group" },
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{ LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS, "Bandwidth Constraints" },
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{ 0, NULL }
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};
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static const struct tok lsa_opaque_grace_tlv_values[] = {
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{ LS_OPAQUE_GRACE_TLV_PERIOD, "Grace Period" },
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{ LS_OPAQUE_GRACE_TLV_REASON, "Graceful restart Reason" },
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{ LS_OPAQUE_GRACE_TLV_INT_ADDRESS, "IPv4 interface address" },
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{ 0, NULL }
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};
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static const struct tok lsa_opaque_grace_tlv_reason_values[] = {
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{ LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN, "Unknown" },
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{ LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART, "Software Restart" },
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{ LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE, "Software Reload/Upgrade" },
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{ LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH, "Control Processor Switch" },
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{ 0, NULL }
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};
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static const struct tok lsa_opaque_te_tlv_link_type_sub_tlv_values[] = {
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{ LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP, "Point-to-point" },
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{ LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA, "Multi-Access" },
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{ 0, NULL }
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};
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static const struct tok lsa_opaque_ri_tlv_values[] = {
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{ LS_OPAQUE_RI_TLV_CAP, "Router Capabilities" },
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{ 0, NULL }
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};
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static const struct tok lsa_opaque_ri_tlv_cap_values[] = {
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{ 1, "Reserved" },
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{ 2, "Reserved" },
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{ 4, "Reserved" },
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{ 8, "Reserved" },
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{ 16, "graceful restart capable" },
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{ 32, "graceful restart helper" },
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{ 64, "Stub router support" },
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{ 128, "Traffic engineering" },
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{ 256, "p2p over LAN" },
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{ 512, "path computation server" },
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{ 0, NULL }
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};
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static const struct tok ospf_lls_tlv_values[] = {
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{ OSPF_LLS_EO, "Extended Options" },
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{ OSPF_LLS_MD5, "MD5 Authentication" },
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{ 0, NULL }
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};
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static const struct tok ospf_lls_eo_options[] = {
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{ OSPF_LLS_EO_LR, "LSDB resync" },
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{ OSPF_LLS_EO_RS, "Restart" },
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{ 0, NULL }
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};
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int
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ospf_print_grace_lsa(netdissect_options *ndo,
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const uint8_t *tptr, u_int ls_length) {
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u_int tlv_type, tlv_length;
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while (ls_length > 0) {
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ND_TCHECK2(*tptr, 4);
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if (ls_length < 4) {
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ND_PRINT((ndo, "\n\t Remaining LS length %u < 4", ls_length));
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return -1;
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}
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tlv_type = EXTRACT_16BITS(tptr);
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tlv_length = EXTRACT_16BITS(tptr+2);
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tptr+=4;
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ls_length-=4;
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ND_PRINT((ndo, "\n\t %s TLV (%u), length %u, value: ",
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tok2str(lsa_opaque_grace_tlv_values,"unknown",tlv_type),
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tlv_type,
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tlv_length));
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if (tlv_length > ls_length) {
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ND_PRINT((ndo, "\n\t Bogus length %u > %u", tlv_length,
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ls_length));
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return -1;
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}
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/* Infinite loop protection. */
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if (tlv_type == 0 || tlv_length ==0) {
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return -1;
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}
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ND_TCHECK2(*tptr, tlv_length);
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switch(tlv_type) {
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case LS_OPAQUE_GRACE_TLV_PERIOD:
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if (tlv_length != 4) {
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ND_PRINT((ndo, "\n\t Bogus length %u != 4", tlv_length));
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return -1;
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}
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ND_PRINT((ndo, "%us", EXTRACT_32BITS(tptr)));
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break;
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case LS_OPAQUE_GRACE_TLV_REASON:
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if (tlv_length != 1) {
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ND_PRINT((ndo, "\n\t Bogus length %u != 1", tlv_length));
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return -1;
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}
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ND_PRINT((ndo, "%s (%u)",
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tok2str(lsa_opaque_grace_tlv_reason_values, "Unknown", *tptr),
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*tptr));
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break;
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case LS_OPAQUE_GRACE_TLV_INT_ADDRESS:
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if (tlv_length != 4) {
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ND_PRINT((ndo, "\n\t Bogus length %u != 4", tlv_length));
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return -1;
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}
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ND_PRINT((ndo, "%s", ipaddr_string(ndo, tptr)));
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break;
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default:
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if (ndo->ndo_vflag <= 1) {
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if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_length))
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return -1;
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}
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break;
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}
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/* in OSPF everything has to be 32-bit aligned, including TLVs */
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if (tlv_length%4 != 0)
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tlv_length+=4-(tlv_length%4);
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ls_length-=tlv_length;
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tptr+=tlv_length;
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}
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return 0;
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trunc:
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return -1;
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}
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int
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ospf_print_te_lsa(netdissect_options *ndo,
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const uint8_t *tptr, u_int ls_length) {
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u_int tlv_type, tlv_length, subtlv_type, subtlv_length;
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u_int priority_level, te_class, count_srlg;
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union { /* int to float conversion buffer for several subTLVs */
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float f;
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uint32_t i;
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} bw;
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while (ls_length != 0) {
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ND_TCHECK2(*tptr, 4);
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if (ls_length < 4) {
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ND_PRINT((ndo, "\n\t Remaining LS length %u < 4", ls_length));
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return -1;
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}
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tlv_type = EXTRACT_16BITS(tptr);
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tlv_length = EXTRACT_16BITS(tptr+2);
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tptr+=4;
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ls_length-=4;
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ND_PRINT((ndo, "\n\t %s TLV (%u), length: %u",
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tok2str(lsa_opaque_te_tlv_values,"unknown",tlv_type),
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tlv_type,
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tlv_length));
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if (tlv_length > ls_length) {
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ND_PRINT((ndo, "\n\t Bogus length %u > %u", tlv_length,
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ls_length));
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return -1;
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}
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/* Infinite loop protection. */
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if (tlv_type == 0 || tlv_length ==0) {
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return -1;
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}
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switch(tlv_type) {
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case LS_OPAQUE_TE_TLV_LINK:
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while (tlv_length >= sizeof(subtlv_type) + sizeof(subtlv_length)) {
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if (tlv_length < 4) {
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ND_PRINT((ndo, "\n\t Remaining TLV length %u < 4",
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tlv_length));
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return -1;
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}
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ND_TCHECK2(*tptr, 4);
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subtlv_type = EXTRACT_16BITS(tptr);
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subtlv_length = EXTRACT_16BITS(tptr+2);
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tptr+=4;
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tlv_length-=4;
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ND_PRINT((ndo, "\n\t %s subTLV (%u), length: %u",
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tok2str(lsa_opaque_te_link_tlv_subtlv_values,"unknown",subtlv_type),
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subtlv_type,
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subtlv_length));
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ND_TCHECK2(*tptr, subtlv_length);
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switch(subtlv_type) {
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case LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP:
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ND_PRINT((ndo, ", 0x%08x", EXTRACT_32BITS(tptr)));
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break;
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case LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID:
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case LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID:
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ND_PRINT((ndo, ", %s (0x%08x)",
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ipaddr_string(ndo, tptr),
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EXTRACT_32BITS(tptr)));
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if (subtlv_length == 8) /* rfc4203 */
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ND_PRINT((ndo, ", %s (0x%08x)",
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ipaddr_string(ndo, tptr+4),
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EXTRACT_32BITS(tptr + 4)));
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break;
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case LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP:
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case LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP:
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ND_PRINT((ndo, ", %s", ipaddr_string(ndo, tptr)));
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break;
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case LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW:
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case LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW:
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bw.i = EXTRACT_32BITS(tptr);
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ND_PRINT((ndo, ", %.3f Mbps", bw.f * 8 / 1000000));
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break;
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case LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW:
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for (te_class = 0; te_class < 8; te_class++) {
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bw.i = EXTRACT_32BITS(tptr+te_class*4);
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ND_PRINT((ndo, "\n\t\tTE-Class %u: %.3f Mbps",
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te_class,
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bw.f * 8 / 1000000));
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}
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break;
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case LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS:
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ND_PRINT((ndo, "\n\t\tBandwidth Constraints Model ID: %s (%u)",
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tok2str(diffserv_te_bc_values, "unknown", *tptr),
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*tptr));
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/* decode BCs until the subTLV ends */
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for (te_class = 0; te_class < (subtlv_length-4)/4; te_class++) {
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bw.i = EXTRACT_32BITS(tptr+4+te_class*4);
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ND_PRINT((ndo, "\n\t\t Bandwidth constraint CT%u: %.3f Mbps",
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te_class,
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bw.f * 8 / 1000000));
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}
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break;
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case LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC:
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ND_PRINT((ndo, ", Metric %u", EXTRACT_32BITS(tptr)));
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break;
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case LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE:
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ND_PRINT((ndo, ", %s, Priority %u",
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bittok2str(gmpls_link_prot_values, "none", *tptr),
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*(tptr + 1)));
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break;
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case LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR:
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ND_PRINT((ndo, "\n\t\tInterface Switching Capability: %s",
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tok2str(gmpls_switch_cap_values, "Unknown", *(tptr))));
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ND_PRINT((ndo, "\n\t\tLSP Encoding: %s\n\t\tMax LSP Bandwidth:",
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tok2str(gmpls_encoding_values, "Unknown", *(tptr + 1))));
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for (priority_level = 0; priority_level < 8; priority_level++) {
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bw.i = EXTRACT_32BITS(tptr+4+(priority_level*4));
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ND_PRINT((ndo, "\n\t\t priority level %d: %.3f Mbps",
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priority_level,
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bw.f * 8 / 1000000));
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}
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break;
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case LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE:
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ND_PRINT((ndo, ", %s (%u)",
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tok2str(lsa_opaque_te_tlv_link_type_sub_tlv_values,"unknown",*tptr),
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*tptr));
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break;
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case LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP:
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count_srlg = subtlv_length / 4;
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if (count_srlg != 0)
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ND_PRINT((ndo, "\n\t\t Shared risk group: "));
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while (count_srlg > 0) {
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bw.i = EXTRACT_32BITS(tptr);
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ND_PRINT((ndo, "%d", bw.i));
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tptr+=4;
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count_srlg--;
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if (count_srlg > 0)
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ND_PRINT((ndo, ", "));
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}
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break;
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default:
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if (ndo->ndo_vflag <= 1) {
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if (!print_unknown_data(ndo, tptr, "\n\t\t", subtlv_length))
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return -1;
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}
|
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break;
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}
|
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/* in OSPF everything has to be 32-bit aligned, including subTLVs */
|
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if (subtlv_length%4 != 0)
|
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subtlv_length+=4-(subtlv_length%4);
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|
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tlv_length-=subtlv_length;
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tptr+=subtlv_length;
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}
|
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break;
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case LS_OPAQUE_TE_TLV_ROUTER:
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if (tlv_length < 4) {
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ND_PRINT((ndo, "\n\t TLV length %u < 4", tlv_length));
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return -1;
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}
|
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ND_TCHECK2(*tptr, 4);
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ND_PRINT((ndo, ", %s", ipaddr_string(ndo, tptr)));
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break;
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default:
|
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if (ndo->ndo_vflag <= 1) {
|
|
if (!print_unknown_data(ndo, 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(netdissect_options *ndo,
|
|
register const struct lsa_hdr *lshp)
|
|
{
|
|
u_int ls_length;
|
|
|
|
ND_TCHECK(lshp->ls_length);
|
|
ls_length = EXTRACT_16BITS(&lshp->ls_length);
|
|
if (ls_length < sizeof(struct lsa_hdr)) {
|
|
ND_PRINT((ndo, "\n\t Bogus length %u < header (%lu)", ls_length,
|
|
(unsigned long)sizeof(struct lsa_hdr)));
|
|
return(-1);
|
|
}
|
|
|
|
ND_TCHECK(lshp->ls_seq); /* XXX - ls_length check checked this */
|
|
ND_PRINT((ndo, "\n\t Advertising Router %s, seq 0x%08x, age %us, length %u",
|
|
ipaddr_string(ndo, &lshp->ls_router),
|
|
EXTRACT_32BITS(&lshp->ls_seq),
|
|
EXTRACT_16BITS(&lshp->ls_age),
|
|
ls_length - (u_int)sizeof(struct lsa_hdr)));
|
|
|
|
ND_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:
|
|
ND_PRINT((ndo, "\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:
|
|
ND_PRINT((ndo, "\n\t %s LSA (%d), LSA-ID: %s",
|
|
tok2str(lsa_values,"unknown",lshp->ls_type),
|
|
lshp->ls_type,
|
|
ipaddr_string(ndo, &lshp->un_lsa_id.lsa_id)));
|
|
break;
|
|
}
|
|
|
|
ND_TCHECK(lshp->ls_options); /* XXX - ls_length check checked this */
|
|
ND_PRINT((ndo, "\n\t Options: [%s]", bittok2str(ospf_option_values, "none", lshp->ls_options)));
|
|
|
|
return (ls_length);
|
|
trunc:
|
|
return (-1);
|
|
}
|
|
|
|
/* draft-ietf-ospf-mt-09 */
|
|
static const 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(netdissect_options *ndo,
|
|
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) {
|
|
ND_PRINT((ndo, "\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 uint8_t *
|
|
ospf_print_lsa(netdissect_options *ndo,
|
|
register const struct lsa *lsap)
|
|
{
|
|
register const uint8_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 uint32_t *lp;
|
|
register int j, tlv_type, tlv_length, topology;
|
|
register int ls_length;
|
|
const uint8_t *tptr;
|
|
|
|
tptr = (uint8_t *)lsap->lsa_un.un_unknown; /* squelch compiler warnings */
|
|
ls_length = ospf_print_lshdr(ndo, &lsap->ls_hdr);
|
|
if (ls_length == -1)
|
|
return(NULL);
|
|
ls_end = (uint8_t *)lsap + ls_length;
|
|
ls_length -= sizeof(struct lsa_hdr);
|
|
|
|
switch (lsap->ls_hdr.ls_type) {
|
|
|
|
case LS_TYPE_ROUTER:
|
|
ND_TCHECK(lsap->lsa_un.un_rla.rla_flags);
|
|
ND_PRINT((ndo, "\n\t Router LSA Options: [%s]",
|
|
bittok2str(ospf_rla_flag_values, "none", lsap->lsa_un.un_rla.rla_flags)));
|
|
|
|
ND_TCHECK(lsap->lsa_un.un_rla.rla_count);
|
|
j = EXTRACT_16BITS(&lsap->lsa_un.un_rla.rla_count);
|
|
ND_TCHECK(lsap->lsa_un.un_rla.rla_link);
|
|
rlp = lsap->lsa_un.un_rla.rla_link;
|
|
while (j--) {
|
|
ND_TCHECK(*rlp);
|
|
switch (rlp->un_tos.link.link_type) {
|
|
|
|
case RLA_TYPE_VIRTUAL:
|
|
ND_PRINT((ndo, "\n\t Virtual Link: Neighbor Router-ID: %s, Interface Address: %s",
|
|
ipaddr_string(ndo, &rlp->link_id),
|
|
ipaddr_string(ndo, &rlp->link_data)));
|
|
break;
|
|
|
|
case RLA_TYPE_ROUTER:
|
|
ND_PRINT((ndo, "\n\t Neighbor Router-ID: %s, Interface Address: %s",
|
|
ipaddr_string(ndo, &rlp->link_id),
|
|
ipaddr_string(ndo, &rlp->link_data)));
|
|
break;
|
|
|
|
case RLA_TYPE_TRANSIT:
|
|
ND_PRINT((ndo, "\n\t Neighbor Network-ID: %s, Interface Address: %s",
|
|
ipaddr_string(ndo, &rlp->link_id),
|
|
ipaddr_string(ndo, &rlp->link_data)));
|
|
break;
|
|
|
|
case RLA_TYPE_STUB:
|
|
ND_PRINT((ndo, "\n\t Stub Network: %s, Mask: %s",
|
|
ipaddr_string(ndo, &rlp->link_id),
|
|
ipaddr_string(ndo, &rlp->link_data)));
|
|
break;
|
|
|
|
default:
|
|
ND_PRINT((ndo, "\n\t Unknown Router Link Type (%u)",
|
|
rlp->un_tos.link.link_type));
|
|
return (ls_end);
|
|
}
|
|
|
|
ospf_print_tos_metrics(ndo, &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:
|
|
ND_TCHECK(lsap->lsa_un.un_nla.nla_mask);
|
|
ND_PRINT((ndo, "\n\t Mask %s\n\t Connected Routers:",
|
|
ipaddr_string(ndo, &lsap->lsa_un.un_nla.nla_mask)));
|
|
ap = lsap->lsa_un.un_nla.nla_router;
|
|
while ((u_char *)ap < ls_end) {
|
|
ND_TCHECK(*ap);
|
|
ND_PRINT((ndo, "\n\t %s", ipaddr_string(ndo, ap)));
|
|
++ap;
|
|
}
|
|
break;
|
|
|
|
case LS_TYPE_SUM_IP:
|
|
ND_TCHECK(lsap->lsa_un.un_nla.nla_mask);
|
|
ND_PRINT((ndo, "\n\t Mask %s",
|
|
ipaddr_string(ndo, &lsap->lsa_un.un_sla.sla_mask)));
|
|
ND_TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
|
|
lp = lsap->lsa_un.un_sla.sla_tosmetric;
|
|
while ((u_char *)lp < ls_end) {
|
|
register uint32_t ul;
|
|
|
|
ND_TCHECK(*lp);
|
|
ul = EXTRACT_32BITS(lp);
|
|
topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS;
|
|
ND_PRINT((ndo, "\n\t\ttopology %s(%u) metric %d",
|
|
tok2str(ospf_topology_values, "", topology),
|
|
topology,
|
|
ul & SLA_MASK_METRIC));
|
|
++lp;
|
|
}
|
|
break;
|
|
|
|
case LS_TYPE_SUM_ABR:
|
|
ND_TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
|
|
lp = lsap->lsa_un.un_sla.sla_tosmetric;
|
|
while ((u_char *)lp < ls_end) {
|
|
register uint32_t ul;
|
|
|
|
ND_TCHECK(*lp);
|
|
ul = EXTRACT_32BITS(lp);
|
|
topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS;
|
|
ND_PRINT((ndo, "\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 */
|
|
ND_TCHECK(lsap->lsa_un.un_nla.nla_mask);
|
|
ND_PRINT((ndo, "\n\t Mask %s",
|
|
ipaddr_string(ndo, &lsap->lsa_un.un_asla.asla_mask)));
|
|
|
|
ND_TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
|
|
almp = lsap->lsa_un.un_asla.asla_metric;
|
|
while ((u_char *)almp < ls_end) {
|
|
register uint32_t ul;
|
|
|
|
ND_TCHECK(almp->asla_tosmetric);
|
|
ul = EXTRACT_32BITS(&almp->asla_tosmetric);
|
|
topology = ((ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS);
|
|
ND_PRINT((ndo, "\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)
|
|
ND_PRINT((ndo, " infinite"));
|
|
else
|
|
ND_PRINT((ndo, " %d", (ul & ASLA_MASK_METRIC)));
|
|
|
|
ND_TCHECK(almp->asla_forward);
|
|
if (almp->asla_forward.s_addr) {
|
|
ND_PRINT((ndo, ", forward %s", ipaddr_string(ndo, &almp->asla_forward)));
|
|
}
|
|
ND_TCHECK(almp->asla_tag);
|
|
if (almp->asla_tag.s_addr) {
|
|
ND_PRINT((ndo, ", tag %s", ipaddr_string(ndo, &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) {
|
|
ND_TCHECK(mcp->mcla_vid);
|
|
switch (EXTRACT_32BITS(&mcp->mcla_vtype)) {
|
|
|
|
case MCLA_VERTEX_ROUTER:
|
|
ND_PRINT((ndo, "\n\t Router Router-ID %s",
|
|
ipaddr_string(ndo, &mcp->mcla_vid)));
|
|
break;
|
|
|
|
case MCLA_VERTEX_NETWORK:
|
|
ND_PRINT((ndo, "\n\t Network Designated Router %s",
|
|
ipaddr_string(ndo, &mcp->mcla_vid)));
|
|
break;
|
|
|
|
default:
|
|
ND_PRINT((ndo, "\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 = (uint8_t *)(&lsap->lsa_un.un_ri_tlv.type);
|
|
|
|
while (ls_length != 0) {
|
|
ND_TCHECK2(*tptr, 4);
|
|
if (ls_length < 4) {
|
|
ND_PRINT((ndo, "\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;
|
|
|
|
ND_PRINT((ndo, "\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) {
|
|
ND_PRINT((ndo, "\n\t Bogus length %u > %u", tlv_length,
|
|
ls_length));
|
|
return(ls_end);
|
|
}
|
|
ND_TCHECK2(*tptr, tlv_length);
|
|
switch(tlv_type) {
|
|
|
|
case LS_OPAQUE_RI_TLV_CAP:
|
|
if (tlv_length != 4) {
|
|
ND_PRINT((ndo, "\n\t Bogus length %u != 4", tlv_length));
|
|
return(ls_end);
|
|
}
|
|
ND_PRINT((ndo, "Capabilities: %s",
|
|
bittok2str(lsa_opaque_ri_tlv_cap_values, "Unknown", EXTRACT_32BITS(tptr))));
|
|
break;
|
|
default:
|
|
if (ndo->ndo_vflag <= 1) {
|
|
if (!print_unknown_data(ndo, 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(ndo, (uint8_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(ndo, (uint8_t *)(&lsap->lsa_un.un_te_lsa_tlv.type),
|
|
ls_length) == -1) {
|
|
return(ls_end);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (ndo->ndo_vflag <= 1) {
|
|
if (!print_unknown_data(ndo, (uint8_t *)lsap->lsa_un.un_unknown,
|
|
"\n\t ", ls_length))
|
|
return(ls_end);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* do we want to see an additionally hexdump ? */
|
|
if (ndo->ndo_vflag> 1)
|
|
if (!print_unknown_data(ndo, (uint8_t *)lsap->lsa_un.un_unknown,
|
|
"\n\t ", ls_length)) {
|
|
return(ls_end);
|
|
}
|
|
|
|
return (ls_end);
|
|
trunc:
|
|
return (NULL);
|
|
}
|
|
|
|
static int
|
|
ospf_decode_lls(netdissect_options *ndo,
|
|
register const struct ospfhdr *op, register u_int length)
|
|
{
|
|
register const u_char *dptr;
|
|
register const u_char *dataend;
|
|
register u_int length2;
|
|
register uint16_t lls_type, lls_len;
|
|
register uint32_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) {
|
|
ND_PRINT((ndo, "\n\t[LLS truncated]"));
|
|
return (1);
|
|
}
|
|
ND_TCHECK2(*dptr, 2);
|
|
ND_PRINT((ndo, "\n\t LLS: checksum: 0x%04x", (u_int)EXTRACT_16BITS(dptr)));
|
|
|
|
dptr += 2;
|
|
ND_TCHECK2(*dptr, 2);
|
|
length2 = EXTRACT_16BITS(dptr);
|
|
ND_PRINT((ndo, ", length: %u", length2));
|
|
|
|
dptr += 2;
|
|
ND_TCHECK(*dptr);
|
|
while (dptr < dataend) {
|
|
ND_TCHECK2(*dptr, 2);
|
|
lls_type = EXTRACT_16BITS(dptr);
|
|
ND_PRINT((ndo, "\n\t %s (%u)",
|
|
tok2str(ospf_lls_tlv_values,"Unknown TLV",lls_type),
|
|
lls_type));
|
|
dptr += 2;
|
|
ND_TCHECK2(*dptr, 2);
|
|
lls_len = EXTRACT_16BITS(dptr);
|
|
ND_PRINT((ndo, ", length: %u", lls_len));
|
|
dptr += 2;
|
|
switch (lls_type) {
|
|
|
|
case OSPF_LLS_EO:
|
|
if (lls_len != 4) {
|
|
ND_PRINT((ndo, " [should be 4]"));
|
|
lls_len = 4;
|
|
}
|
|
ND_TCHECK2(*dptr, 4);
|
|
lls_flags = EXTRACT_32BITS(dptr);
|
|
ND_PRINT((ndo, "\n\t Options: 0x%08x [%s]", lls_flags,
|
|
bittok2str(ospf_lls_eo_options, "?", lls_flags)));
|
|
|
|
break;
|
|
|
|
case OSPF_LLS_MD5:
|
|
if (lls_len != 20) {
|
|
ND_PRINT((ndo, " [should be 20]"));
|
|
lls_len = 20;
|
|
}
|
|
ND_TCHECK2(*dptr, 4);
|
|
ND_PRINT((ndo, "\n\t Sequence number: 0x%08x", EXTRACT_32BITS(dptr)));
|
|
break;
|
|
}
|
|
|
|
dptr += lls_len;
|
|
}
|
|
|
|
return (0);
|
|
trunc:
|
|
return (1);
|
|
}
|
|
|
|
static int
|
|
ospf_decode_v2(netdissect_options *ndo,
|
|
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 uint32_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:
|
|
ND_PRINT((ndo, "\n\tOptions [%s]",
|
|
bittok2str(ospf_option_values,"none",op->ospf_hello.hello_options)));
|
|
|
|
ND_TCHECK(op->ospf_hello.hello_deadint);
|
|
ND_PRINT((ndo, "\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(ndo, &op->ospf_hello.hello_mask),
|
|
op->ospf_hello.hello_priority));
|
|
|
|
ND_TCHECK(op->ospf_hello.hello_dr);
|
|
if (op->ospf_hello.hello_dr.s_addr != 0)
|
|
ND_PRINT((ndo, "\n\t Designated Router %s",
|
|
ipaddr_string(ndo, &op->ospf_hello.hello_dr)));
|
|
|
|
ND_TCHECK(op->ospf_hello.hello_bdr);
|
|
if (op->ospf_hello.hello_bdr.s_addr != 0)
|
|
ND_PRINT((ndo, ", Backup Designated Router %s",
|
|
ipaddr_string(ndo, &op->ospf_hello.hello_bdr)));
|
|
|
|
ap = op->ospf_hello.hello_neighbor;
|
|
if ((u_char *)ap < dataend)
|
|
ND_PRINT((ndo, "\n\t Neighbor List:"));
|
|
while ((u_char *)ap < dataend) {
|
|
ND_TCHECK(*ap);
|
|
ND_PRINT((ndo, "\n\t %s", ipaddr_string(ndo, ap)));
|
|
++ap;
|
|
}
|
|
break; /* HELLO */
|
|
|
|
case OSPF_TYPE_DD:
|
|
ND_TCHECK(op->ospf_db.db_options);
|
|
ND_PRINT((ndo, "\n\tOptions [%s]",
|
|
bittok2str(ospf_option_values, "none", op->ospf_db.db_options)));
|
|
ND_TCHECK(op->ospf_db.db_flags);
|
|
ND_PRINT((ndo, ", DD Flags [%s]",
|
|
bittok2str(ospf_dd_flag_values, "none", op->ospf_db.db_flags)));
|
|
ND_TCHECK(op->ospf_db.db_ifmtu);
|
|
if (op->ospf_db.db_ifmtu) {
|
|
ND_PRINT((ndo, ", MTU: %u", EXTRACT_16BITS(&op->ospf_db.db_ifmtu)));
|
|
}
|
|
ND_TCHECK(op->ospf_db.db_seq);
|
|
ND_PRINT((ndo, ", 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(ndo, lshp) != -1) {
|
|
++lshp;
|
|
}
|
|
break;
|
|
|
|
case OSPF_TYPE_LS_REQ:
|
|
lsrp = op->ospf_lsr;
|
|
while ((u_char *)lsrp < dataend) {
|
|
ND_TCHECK(*lsrp);
|
|
|
|
ND_PRINT((ndo, "\n\t Advertising Router: %s, %s LSA (%u)",
|
|
ipaddr_string(ndo, &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:
|
|
ND_PRINT((ndo, ", 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:
|
|
ND_PRINT((ndo, ", LSA-ID: %s",
|
|
ipaddr_string(ndo, &lsrp->un_ls_stateid.ls_stateid)));
|
|
break;
|
|
}
|
|
|
|
++lsrp;
|
|
}
|
|
break;
|
|
|
|
case OSPF_TYPE_LS_UPDATE:
|
|
lsap = op->ospf_lsu.lsu_lsa;
|
|
ND_TCHECK(op->ospf_lsu.lsu_count);
|
|
lsa_count_max = EXTRACT_32BITS(&op->ospf_lsu.lsu_count);
|
|
ND_PRINT((ndo, ", %d LSA%s", lsa_count_max, PLURAL_SUFFIX(lsa_count_max)));
|
|
for (lsa_count=1;lsa_count <= lsa_count_max;lsa_count++) {
|
|
ND_PRINT((ndo, "\n\t LSA #%u", lsa_count));
|
|
lsap = (const struct lsa *)ospf_print_lsa(ndo, lsap);
|
|
if (lsap == NULL)
|
|
goto trunc;
|
|
}
|
|
break;
|
|
|
|
case OSPF_TYPE_LS_ACK:
|
|
lshp = op->ospf_lsa.lsa_lshdr;
|
|
while (ospf_print_lshdr(ndo, lshp) != -1) {
|
|
++lshp;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
return (0);
|
|
trunc:
|
|
return (1);
|
|
}
|
|
|
|
void
|
|
ospf_print(netdissect_options *ndo,
|
|
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 */
|
|
ND_TCHECK(op->ospf_authtype);
|
|
if (EXTRACT_16BITS(&op->ospf_authtype) == OSPF_AUTH_MD5) {
|
|
length -= OSPF_AUTH_MD5_LEN;
|
|
ndo->ndo_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 */
|
|
ND_TCHECK(op->ospf_type);
|
|
cp = tok2str(type2str, "unknown LS-type", op->ospf_type);
|
|
ND_PRINT((ndo, "OSPFv%u, %s, length %u", op->ospf_version, cp, length));
|
|
if (*cp == 'u')
|
|
return;
|
|
|
|
if (!ndo->ndo_vflag) { /* non verbose - so lets bail out here */
|
|
return;
|
|
}
|
|
|
|
ND_TCHECK(op->ospf_len);
|
|
if (length != EXTRACT_16BITS(&op->ospf_len)) {
|
|
ND_PRINT((ndo, " [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;
|
|
}
|
|
|
|
ND_TCHECK(op->ospf_routerid);
|
|
ND_PRINT((ndo, "\n\tRouter-ID %s", ipaddr_string(ndo, &op->ospf_routerid)));
|
|
|
|
ND_TCHECK(op->ospf_areaid);
|
|
if (op->ospf_areaid.s_addr != 0)
|
|
ND_PRINT((ndo, ", Area %s", ipaddr_string(ndo, &op->ospf_areaid)));
|
|
else
|
|
ND_PRINT((ndo, ", Backbone Area"));
|
|
|
|
if (ndo->ndo_vflag) {
|
|
/* Print authentication data (should we really do this?) */
|
|
ND_TCHECK2(op->ospf_authdata[0], sizeof(op->ospf_authdata));
|
|
|
|
ND_PRINT((ndo, ", 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:
|
|
ND_PRINT((ndo, "\n\tSimple text password: "));
|
|
safeputs(ndo, op->ospf_authdata, OSPF_AUTH_SIMPLE_LEN);
|
|
break;
|
|
|
|
case OSPF_AUTH_MD5:
|
|
ND_PRINT((ndo, "\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(ndo, op, dataend))
|
|
goto trunc;
|
|
if (length > EXTRACT_16BITS(&op->ospf_len)) {
|
|
if (ospf_decode_lls(ndo, op, length))
|
|
goto trunc;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
ND_PRINT((ndo, " ospf [version %d]", op->ospf_version));
|
|
break;
|
|
} /* end switch on version */
|
|
|
|
return;
|
|
trunc:
|
|
ND_PRINT((ndo, "%s", tstr));
|
|
}
|