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2669 lines
86 KiB
C
2669 lines
86 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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* Original code by Matt Thomas, Digital Equipment Corporation
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*
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* Extensively modified by Hannes Gredler (hannes@juniper.net) for more
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* complete IS-IS & CLNP support.
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*
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* $FreeBSD$
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*/
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#ifndef lint
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static const char rcsid[] _U_ =
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"@(#) $Header: /tcpdump/master/tcpdump/print-isoclns.c,v 1.133.2.12 2005/06/16 01:14:52 guy Exp $ (LBL)";
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#endif
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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 <stdio.h>
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#include <string.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "ethertype.h"
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#include "ether.h"
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#include "nlpid.h"
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#include "extract.h"
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#include "gmpls.h"
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#include "oui.h"
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#define IPV4 1 /* AFI value */
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#define IPV6 2 /* AFI value */
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/*
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* IS-IS is defined in ISO 10589. Look there for protocol definitions.
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*/
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#define SYSTEM_ID_LEN ETHER_ADDR_LEN
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#define NODE_ID_LEN SYSTEM_ID_LEN+1
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#define LSP_ID_LEN SYSTEM_ID_LEN+2
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#define ISIS_VERSION 1
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#define ESIS_VERSION 1
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#define CLNP_VERSION 1
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#define ISIS_PDU_TYPE_MASK 0x1F
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#define ESIS_PDU_TYPE_MASK 0x1F
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#define CLNP_PDU_TYPE_MASK 0x1F
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#define CLNP_FLAG_MASK 0xE0
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#define ISIS_LAN_PRIORITY_MASK 0x7F
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#define ISIS_PDU_L1_LAN_IIH 15
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#define ISIS_PDU_L2_LAN_IIH 16
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#define ISIS_PDU_PTP_IIH 17
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#define ISIS_PDU_L1_LSP 18
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#define ISIS_PDU_L2_LSP 20
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#define ISIS_PDU_L1_CSNP 24
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#define ISIS_PDU_L2_CSNP 25
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#define ISIS_PDU_L1_PSNP 26
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#define ISIS_PDU_L2_PSNP 27
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static struct tok isis_pdu_values[] = {
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{ ISIS_PDU_L1_LAN_IIH, "L1 Lan IIH"},
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{ ISIS_PDU_L2_LAN_IIH, "L2 Lan IIH"},
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{ ISIS_PDU_PTP_IIH, "p2p IIH"},
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{ ISIS_PDU_L1_LSP, "L1 LSP"},
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{ ISIS_PDU_L2_LSP, "L2 LSP"},
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{ ISIS_PDU_L1_CSNP, "L1 CSNP"},
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{ ISIS_PDU_L2_CSNP, "L2 CSNP"},
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{ ISIS_PDU_L1_PSNP, "L1 PSNP"},
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{ ISIS_PDU_L2_PSNP, "L2 PSNP"},
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{ 0, NULL}
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};
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/*
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* A TLV is a tuple of a type, length and a value and is normally used for
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* encoding information in all sorts of places. This is an enumeration of
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* the well known types.
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*
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* list taken from rfc3359 plus some memory from veterans ;-)
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*/
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#define ISIS_TLV_AREA_ADDR 1 /* iso10589 */
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#define ISIS_TLV_IS_REACH 2 /* iso10589 */
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#define ISIS_TLV_ESNEIGH 3 /* iso10589 */
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#define ISIS_TLV_PART_DIS 4 /* iso10589 */
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#define ISIS_TLV_PREFIX_NEIGH 5 /* iso10589 */
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#define ISIS_TLV_ISNEIGH 6 /* iso10589 */
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#define ISIS_TLV_ISNEIGH_VARLEN 7 /* iso10589 */
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#define ISIS_TLV_PADDING 8 /* iso10589 */
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#define ISIS_TLV_LSP 9 /* iso10589 */
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#define ISIS_TLV_AUTH 10 /* iso10589, rfc3567 */
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#define ISIS_TLV_CHECKSUM 12 /* rfc3358 */
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#define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */
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#define ISIS_TLV_EXT_IS_REACH 22 /* draft-ietf-isis-traffic-05 */
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#define ISIS_TLV_IS_ALIAS_ID 24 /* draft-ietf-isis-ext-lsp-frags-02 */
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#define ISIS_TLV_DECNET_PHASE4 42
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#define ISIS_TLV_LUCENT_PRIVATE 66
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#define ISIS_TLV_INT_IP_REACH 128 /* rfc1195, rfc2966 */
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#define ISIS_TLV_PROTOCOLS 129 /* rfc1195 */
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#define ISIS_TLV_EXT_IP_REACH 130 /* rfc1195, rfc2966 */
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#define ISIS_TLV_IDRP_INFO 131 /* rfc1195 */
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#define ISIS_TLV_IPADDR 132 /* rfc1195 */
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#define ISIS_TLV_IPAUTH 133 /* rfc1195 */
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#define ISIS_TLV_TE_ROUTER_ID 134 /* draft-ietf-isis-traffic-05 */
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#define ISIS_TLV_EXTD_IP_REACH 135 /* draft-ietf-isis-traffic-05 */
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#define ISIS_TLV_HOSTNAME 137 /* rfc2763 */
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#define ISIS_TLV_SHARED_RISK_GROUP 138 /* draft-ietf-isis-gmpls-extensions */
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#define ISIS_TLV_NORTEL_PRIVATE1 176
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#define ISIS_TLV_NORTEL_PRIVATE2 177
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#define ISIS_TLV_RESTART_SIGNALING 211 /* rfc3847 */
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#define ISIS_TLV_MT_IS_REACH 222 /* draft-ietf-isis-wg-multi-topology-05 */
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#define ISIS_TLV_MT_SUPPORTED 229 /* draft-ietf-isis-wg-multi-topology-05 */
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#define ISIS_TLV_IP6ADDR 232 /* draft-ietf-isis-ipv6-02 */
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#define ISIS_TLV_MT_IP_REACH 235 /* draft-ietf-isis-wg-multi-topology-05 */
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#define ISIS_TLV_IP6_REACH 236 /* draft-ietf-isis-ipv6-02 */
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#define ISIS_TLV_MT_IP6_REACH 237 /* draft-ietf-isis-wg-multi-topology-05 */
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#define ISIS_TLV_PTP_ADJ 240 /* rfc3373 */
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#define ISIS_TLV_IIH_SEQNR 241 /* draft-shen-isis-iih-sequence-00 */
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#define ISIS_TLV_VENDOR_PRIVATE 250 /* draft-ietf-isis-experimental-tlv-01 */
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static struct tok isis_tlv_values[] = {
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{ ISIS_TLV_AREA_ADDR, "Area address(es)"},
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{ ISIS_TLV_IS_REACH, "IS Reachability"},
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{ ISIS_TLV_ESNEIGH, "ES Neighbor(s)"},
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{ ISIS_TLV_PART_DIS, "Partition DIS"},
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{ ISIS_TLV_PREFIX_NEIGH, "Prefix Neighbors"},
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{ ISIS_TLV_ISNEIGH, "IS Neighbor(s)"},
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{ ISIS_TLV_ISNEIGH_VARLEN, "IS Neighbor(s) (variable length)"},
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{ ISIS_TLV_PADDING, "Padding"},
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{ ISIS_TLV_LSP, "LSP entries"},
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{ ISIS_TLV_AUTH, "Authentication"},
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{ ISIS_TLV_CHECKSUM, "Checksum"},
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{ ISIS_TLV_LSP_BUFFERSIZE, "LSP Buffersize"},
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{ ISIS_TLV_EXT_IS_REACH, "Extended IS Reachability"},
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{ ISIS_TLV_IS_ALIAS_ID, "IS Alias ID"},
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{ ISIS_TLV_DECNET_PHASE4, "DECnet Phase IV"},
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{ ISIS_TLV_LUCENT_PRIVATE, "Lucent Proprietary"},
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{ ISIS_TLV_INT_IP_REACH, "IPv4 Internal Reachability"},
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{ ISIS_TLV_PROTOCOLS, "Protocols supported"},
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{ ISIS_TLV_EXT_IP_REACH, "IPv4 External Reachability"},
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{ ISIS_TLV_IDRP_INFO, "Inter-Domain Information Type"},
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{ ISIS_TLV_IPADDR, "IPv4 Interface address(es)"},
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{ ISIS_TLV_IPAUTH, "IPv4 authentication (deprecated)"},
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{ ISIS_TLV_TE_ROUTER_ID, "Traffic Engineering Router ID"},
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{ ISIS_TLV_EXTD_IP_REACH, "Extended IPv4 Reachability"},
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{ ISIS_TLV_SHARED_RISK_GROUP, "Shared Risk Link Group"},
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{ ISIS_TLV_NORTEL_PRIVATE1, "Nortel Proprietary"},
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{ ISIS_TLV_NORTEL_PRIVATE2, "Nortel Proprietary"},
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{ ISIS_TLV_HOSTNAME, "Hostname"},
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{ ISIS_TLV_RESTART_SIGNALING, "Restart Signaling"},
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{ ISIS_TLV_MT_IS_REACH, "Multi Topology IS Reachability"},
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{ ISIS_TLV_MT_SUPPORTED, "Multi Topology"},
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{ ISIS_TLV_IP6ADDR, "IPv6 Interface address(es)"},
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{ ISIS_TLV_MT_IP_REACH, "Multi-Topology IPv4 Reachability"},
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{ ISIS_TLV_IP6_REACH, "IPv6 reachability"},
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{ ISIS_TLV_MT_IP6_REACH, "Multi-Topology IP6 Reachability"},
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{ ISIS_TLV_PTP_ADJ, "Point-to-point Adjacency State"},
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{ ISIS_TLV_IIH_SEQNR, "Hello PDU Sequence Number"},
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{ ISIS_TLV_VENDOR_PRIVATE, "Vendor Private"},
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{ 0, NULL }
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};
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#define ESIS_OPTION_PROTOCOLS 129
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#define ESIS_OPTION_QOS_MAINTENANCE 195 /* iso9542 */
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#define ESIS_OPTION_SECURITY 197 /* iso9542 */
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#define ESIS_OPTION_ES_CONF_TIME 198 /* iso9542 */
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#define ESIS_OPTION_PRIORITY 205 /* iso9542 */
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#define ESIS_OPTION_ADDRESS_MASK 225 /* iso9542 */
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#define ESIS_OPTION_SNPA_MASK 226 /* iso9542 */
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static struct tok esis_option_values[] = {
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{ ESIS_OPTION_PROTOCOLS, "Protocols supported"},
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{ ESIS_OPTION_QOS_MAINTENANCE, "QoS Maintenance" },
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{ ESIS_OPTION_SECURITY, "Security" },
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{ ESIS_OPTION_ES_CONF_TIME, "ES Configuration Time" },
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{ ESIS_OPTION_PRIORITY, "Priority" },
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{ ESIS_OPTION_ADDRESS_MASK, "Addressk Mask" },
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{ ESIS_OPTION_SNPA_MASK, "SNPA Mask" },
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{ 0, NULL }
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};
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#define CLNP_OPTION_DISCARD_REASON 193
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#define CLNP_OPTION_QOS_MAINTENANCE 195 /* iso8473 */
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#define CLNP_OPTION_SECURITY 197 /* iso8473 */
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#define CLNP_OPTION_SOURCE_ROUTING 200 /* iso8473 */
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#define CLNP_OPTION_ROUTE_RECORDING 203 /* iso8473 */
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#define CLNP_OPTION_PADDING 204 /* iso8473 */
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#define CLNP_OPTION_PRIORITY 205 /* iso8473 */
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static struct tok clnp_option_values[] = {
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{ CLNP_OPTION_DISCARD_REASON, "Discard Reason"},
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{ CLNP_OPTION_PRIORITY, "Priority"},
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{ CLNP_OPTION_QOS_MAINTENANCE, "QoS Maintenance"},
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{ CLNP_OPTION_SECURITY, "Security"},
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{ CLNP_OPTION_SOURCE_ROUTING, "Source Routing"},
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{ CLNP_OPTION_ROUTE_RECORDING, "Route Recording"},
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{ CLNP_OPTION_PADDING, "Padding"},
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{ 0, NULL }
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};
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static struct tok clnp_option_rfd_class_values[] = {
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{ 0x0, "General"},
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{ 0x8, "Address"},
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{ 0x9, "Source Routeing"},
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{ 0xa, "Lifetime"},
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{ 0xb, "PDU Discarded"},
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{ 0xc, "Reassembly"},
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{ 0, NULL }
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};
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static struct tok clnp_option_rfd_general_values[] = {
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{ 0x0, "Reason not specified"},
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{ 0x1, "Protocol procedure error"},
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{ 0x2, "Incorrect checksum"},
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{ 0x3, "PDU discarded due to congestion"},
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{ 0x4, "Header syntax error (cannot be parsed)"},
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{ 0x5, "Segmentation needed but not permitted"},
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{ 0x6, "Incomplete PDU received"},
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{ 0x7, "Duplicate option"},
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{ 0, NULL }
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};
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static struct tok clnp_option_rfd_address_values[] = {
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{ 0x0, "Destination address unreachable"},
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{ 0x1, "Destination address unknown"},
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{ 0, NULL }
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};
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static struct tok clnp_option_rfd_source_routeing_values[] = {
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{ 0x0, "Unspecified source routeing error"},
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{ 0x1, "Syntax error in source routeing field"},
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{ 0x2, "Unknown address in source routeing field"},
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{ 0x3, "Path not acceptable"},
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{ 0, NULL }
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};
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static struct tok clnp_option_rfd_lifetime_values[] = {
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{ 0x0, "Lifetime expired while data unit in transit"},
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{ 0x1, "Lifetime expired during reassembly"},
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{ 0, NULL }
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};
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static struct tok clnp_option_rfd_pdu_discard_values[] = {
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{ 0x0, "Unsupported option not specified"},
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{ 0x1, "Unsupported protocol version"},
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{ 0x2, "Unsupported security option"},
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{ 0x3, "Unsupported source routeing option"},
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{ 0x4, "Unsupported recording of route option"},
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{ 0, NULL }
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};
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static struct tok clnp_option_rfd_reassembly_values[] = {
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{ 0x0, "Reassembly interference"},
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{ 0, NULL }
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};
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/* array of 16 error-classes */
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static struct tok *clnp_option_rfd_error_class[] = {
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clnp_option_rfd_general_values,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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clnp_option_rfd_address_values,
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clnp_option_rfd_source_routeing_values,
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clnp_option_rfd_lifetime_values,
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clnp_option_rfd_pdu_discard_values,
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clnp_option_rfd_reassembly_values,
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NULL,
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NULL,
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NULL
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};
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#define CLNP_OPTION_OPTION_QOS_MASK 0x3f
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#define CLNP_OPTION_SCOPE_MASK 0xc0
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#define CLNP_OPTION_SCOPE_SA_SPEC 0x40
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#define CLNP_OPTION_SCOPE_DA_SPEC 0x80
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#define CLNP_OPTION_SCOPE_GLOBAL 0xc0
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static struct tok clnp_option_scope_values[] = {
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{ CLNP_OPTION_SCOPE_SA_SPEC, "Source Address Specific"},
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{ CLNP_OPTION_SCOPE_DA_SPEC, "Destination Address Specific"},
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{ CLNP_OPTION_SCOPE_GLOBAL, "Globally unique"},
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{ 0, NULL }
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};
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static struct tok clnp_option_sr_rr_values[] = {
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{ 0x0, "partial"},
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{ 0x1, "complete"},
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{ 0, NULL }
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};
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static struct tok clnp_option_sr_rr_string_values[] = {
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{ CLNP_OPTION_SOURCE_ROUTING, "source routing"},
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{ CLNP_OPTION_ROUTE_RECORDING, "recording of route in progress"},
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{ 0, NULL }
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};
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static struct tok clnp_option_qos_global_values[] = {
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{ 0x20, "reserved"},
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{ 0x10, "sequencing vs. delay"},
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{ 0x08, "congested"},
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{ 0x04, "delay vs. cost"},
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{ 0x02, "error vs. delay"},
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{ 0x01, "error vs. cost"},
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{ 0, NULL }
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};
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#define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* draft-ietf-isis-traffic-05 */
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#define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* draft-ietf-isis-gmpls-extensions */
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#define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* draft-ietf-isis-traffic-05 */
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#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* draft-ietf-isis-traffic-05 */
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#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* draft-ietf-isis-traffic-05 */
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#define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* draft-ietf-isis-traffic-05 */
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#define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* draft-ietf-isis-traffic-05 */
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#define ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 /* draft-ietf-isis-traffic-05 */
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#define ISIS_SUBTLV_EXT_IS_REACH_DIFFSERV_TE 12 /* draft-ietf-tewg-diff-te-proto-06 */
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#define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* draft-ietf-isis-traffic-05 */
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#define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* draft-ietf-isis-gmpls-extensions */
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#define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* draft-ietf-isis-gmpls-extensions */
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static struct tok isis_ext_is_reach_subtlv_values[] = {
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{ ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP, "Administrative groups" },
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{ ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" },
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{ ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID, "Link Remote Identifier" },
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{ ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR, "IPv4 interface address" },
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{ ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR, "IPv4 neighbor address" },
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{ ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW, "Maximum link bandwidth" },
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{ ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW, "Reservable link bandwidth" },
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{ ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW, "Unreserved bandwidth" },
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{ ISIS_SUBTLV_EXT_IS_REACH_DIFFSERV_TE, "Diffserv TE" },
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{ ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC, "Traffic Engineering Metric" },
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{ ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE, "Link Protection Type" },
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{ ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR, "Interface Switching Capability" },
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{ 250, "Reserved for cisco specific extensions" },
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{ 251, "Reserved for cisco specific extensions" },
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{ 252, "Reserved for cisco specific extensions" },
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{ 253, "Reserved for cisco specific extensions" },
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{ 254, "Reserved for cisco specific extensions" },
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{ 255, "Reserved for future expansion" },
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{ 0, NULL }
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};
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#define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32 1 /* draft-ietf-isis-admin-tags-01 */
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#define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64 2 /* draft-ietf-isis-admin-tags-01 */
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#define ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR 117 /* draft-ietf-isis-wg-multi-topology-05 */
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static struct tok isis_ext_ip_reach_subtlv_values[] = {
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{ ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32, "32-Bit Administrative tag" },
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{ ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64, "64-Bit Administrative tag" },
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{ ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR, "Management Prefix Color" },
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{ 0, NULL }
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};
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|
|
#define ISIS_SUBTLV_AUTH_SIMPLE 1
|
|
#define ISIS_SUBTLV_AUTH_MD5 54
|
|
#define ISIS_SUBTLV_AUTH_MD5_LEN 16
|
|
#define ISIS_SUBTLV_AUTH_PRIVATE 255
|
|
|
|
static struct tok isis_subtlv_auth_values[] = {
|
|
{ ISIS_SUBTLV_AUTH_SIMPLE, "simple text password"},
|
|
{ ISIS_SUBTLV_AUTH_MD5, "HMAC-MD5 password"},
|
|
{ ISIS_SUBTLV_AUTH_PRIVATE, "Routing Domain private password"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
#define ISIS_SUBTLV_IDRP_RES 0
|
|
#define ISIS_SUBTLV_IDRP_LOCAL 1
|
|
#define ISIS_SUBTLV_IDRP_ASN 2
|
|
|
|
static struct tok isis_subtlv_idrp_values[] = {
|
|
{ ISIS_SUBTLV_IDRP_RES, "Reserved"},
|
|
{ ISIS_SUBTLV_IDRP_LOCAL, "Routing-Domain Specific"},
|
|
{ ISIS_SUBTLV_IDRP_ASN, "AS Number Tag"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
#define CLNP_SEGMENT_PART 0x80
|
|
#define CLNP_MORE_SEGMENTS 0x40
|
|
#define CLNP_REQUEST_ER 0x20
|
|
|
|
static struct tok clnp_flag_values[] = {
|
|
{ CLNP_SEGMENT_PART, "Segmentation permitted"},
|
|
{ CLNP_MORE_SEGMENTS, "more Segments"},
|
|
{ CLNP_REQUEST_ER, "request Error Report"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
#define ISIS_MASK_LSP_OL_BIT(x) ((x)&0x4)
|
|
#define ISIS_MASK_LSP_ISTYPE_BITS(x) ((x)&0x3)
|
|
#define ISIS_MASK_LSP_PARTITION_BIT(x) ((x)&0x80)
|
|
#define ISIS_MASK_LSP_ATT_BITS(x) ((x)&0x78)
|
|
#define ISIS_MASK_LSP_ATT_ERROR_BIT(x) ((x)&0x40)
|
|
#define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) ((x)&0x20)
|
|
#define ISIS_MASK_LSP_ATT_DELAY_BIT(x) ((x)&0x10)
|
|
#define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) ((x)&0x8)
|
|
|
|
#define ISIS_MASK_MTID(x) ((x)&0x0fff)
|
|
#define ISIS_MASK_MTFLAGS(x) ((x)&0xf000)
|
|
|
|
static struct tok isis_mt_flag_values[] = {
|
|
{ 0x4000, "sub-TLVs present"},
|
|
{ 0x8000, "ATT bit set"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
#define ISIS_MASK_TLV_EXTD_IP_UPDOWN(x) ((x)&0x80)
|
|
#define ISIS_MASK_TLV_EXTD_IP_SUBTLV(x) ((x)&0x40)
|
|
|
|
#define ISIS_MASK_TLV_EXTD_IP6_IE(x) ((x)&0x40)
|
|
#define ISIS_MASK_TLV_EXTD_IP6_SUBTLV(x) ((x)&0x20)
|
|
|
|
#define ISIS_LSP_TLV_METRIC_SUPPORTED(x) ((x)&0x80)
|
|
#define ISIS_LSP_TLV_METRIC_IE(x) ((x)&0x40)
|
|
#define ISIS_LSP_TLV_METRIC_UPDOWN(x) ((x)&0x80)
|
|
#define ISIS_LSP_TLV_METRIC_VALUE(x) ((x)&0x3f)
|
|
|
|
#define ISIS_MASK_TLV_SHARED_RISK_GROUP(x) ((x)&0x1)
|
|
|
|
static struct tok isis_mt_values[] = {
|
|
{ 0, "IPv4 unicast"},
|
|
{ 1, "In-Band Management"},
|
|
{ 2, "IPv6 unicast"},
|
|
{ 3, "Multicast"},
|
|
{ 4095, "Development, Experimental or Proprietary"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static struct tok isis_iih_circuit_type_values[] = {
|
|
{ 1, "Level 1 only"},
|
|
{ 2, "Level 2 only"},
|
|
{ 3, "Level 1, Level 2"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
#define ISIS_LSP_TYPE_UNUSED0 0
|
|
#define ISIS_LSP_TYPE_LEVEL_1 1
|
|
#define ISIS_LSP_TYPE_UNUSED2 2
|
|
#define ISIS_LSP_TYPE_LEVEL_2 3
|
|
|
|
static struct tok isis_lsp_istype_values[] = {
|
|
{ ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"},
|
|
{ ISIS_LSP_TYPE_LEVEL_1, "L1 IS"},
|
|
{ ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"},
|
|
{ ISIS_LSP_TYPE_LEVEL_2, "L1L2 IS"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/*
|
|
* Katz's point to point adjacency TLV uses codes to tell us the state of
|
|
* the remote adjacency. Enumerate them.
|
|
*/
|
|
|
|
#define ISIS_PTP_ADJ_UP 0
|
|
#define ISIS_PTP_ADJ_INIT 1
|
|
#define ISIS_PTP_ADJ_DOWN 2
|
|
|
|
static struct tok isis_ptp_adjancey_values[] = {
|
|
{ ISIS_PTP_ADJ_UP, "Up" },
|
|
{ ISIS_PTP_ADJ_INIT, "Initializing" },
|
|
{ ISIS_PTP_ADJ_DOWN, "Down" },
|
|
{ 0, NULL}
|
|
};
|
|
|
|
struct isis_tlv_ptp_adj {
|
|
u_int8_t adjacency_state;
|
|
u_int8_t extd_local_circuit_id[4];
|
|
u_int8_t neighbor_sysid[SYSTEM_ID_LEN];
|
|
u_int8_t neighbor_extd_local_circuit_id[4];
|
|
};
|
|
|
|
static int osi_cksum(const u_int8_t *, u_int);
|
|
static int clnp_print(const u_int8_t *, u_int);
|
|
static void esis_print(const u_int8_t *, u_int);
|
|
static int isis_print(const u_int8_t *, u_int);
|
|
|
|
struct isis_metric_block {
|
|
u_int8_t metric_default;
|
|
u_int8_t metric_delay;
|
|
u_int8_t metric_expense;
|
|
u_int8_t metric_error;
|
|
};
|
|
|
|
struct isis_tlv_is_reach {
|
|
struct isis_metric_block isis_metric_block;
|
|
u_int8_t neighbor_nodeid[NODE_ID_LEN];
|
|
};
|
|
|
|
struct isis_tlv_es_reach {
|
|
struct isis_metric_block isis_metric_block;
|
|
u_int8_t neighbor_sysid[SYSTEM_ID_LEN];
|
|
};
|
|
|
|
struct isis_tlv_ip_reach {
|
|
struct isis_metric_block isis_metric_block;
|
|
u_int8_t prefix[4];
|
|
u_int8_t mask[4];
|
|
};
|
|
|
|
static struct tok isis_is_reach_virtual_values[] = {
|
|
{ 0, "IsNotVirtual"},
|
|
{ 1, "IsVirtual"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static struct tok isis_restart_flag_values[] = {
|
|
{ 0x1, "Restart Request"},
|
|
{ 0x2, "Restart Acknowledgement"},
|
|
{ 0x4, "Suppress adjacency advertisement"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
struct isis_common_header {
|
|
u_int8_t nlpid;
|
|
u_int8_t fixed_len;
|
|
u_int8_t version; /* Protocol version */
|
|
u_int8_t id_length;
|
|
u_int8_t pdu_type; /* 3 MSbits are reserved */
|
|
u_int8_t pdu_version; /* Packet format version */
|
|
u_int8_t reserved;
|
|
u_int8_t max_area;
|
|
};
|
|
|
|
struct isis_iih_lan_header {
|
|
u_int8_t circuit_type;
|
|
u_int8_t source_id[SYSTEM_ID_LEN];
|
|
u_int8_t holding_time[2];
|
|
u_int8_t pdu_len[2];
|
|
u_int8_t priority;
|
|
u_int8_t lan_id[NODE_ID_LEN];
|
|
};
|
|
|
|
struct isis_iih_ptp_header {
|
|
u_int8_t circuit_type;
|
|
u_int8_t source_id[SYSTEM_ID_LEN];
|
|
u_int8_t holding_time[2];
|
|
u_int8_t pdu_len[2];
|
|
u_int8_t circuit_id;
|
|
};
|
|
|
|
struct isis_lsp_header {
|
|
u_int8_t pdu_len[2];
|
|
u_int8_t remaining_lifetime[2];
|
|
u_int8_t lsp_id[LSP_ID_LEN];
|
|
u_int8_t sequence_number[4];
|
|
u_int8_t checksum[2];
|
|
u_int8_t typeblock;
|
|
};
|
|
|
|
struct isis_csnp_header {
|
|
u_int8_t pdu_len[2];
|
|
u_int8_t source_id[NODE_ID_LEN];
|
|
u_int8_t start_lsp_id[LSP_ID_LEN];
|
|
u_int8_t end_lsp_id[LSP_ID_LEN];
|
|
};
|
|
|
|
struct isis_psnp_header {
|
|
u_int8_t pdu_len[2];
|
|
u_int8_t source_id[NODE_ID_LEN];
|
|
};
|
|
|
|
struct isis_tlv_lsp {
|
|
u_int8_t remaining_lifetime[2];
|
|
u_int8_t lsp_id[LSP_ID_LEN];
|
|
u_int8_t sequence_number[4];
|
|
u_int8_t checksum[2];
|
|
};
|
|
|
|
#define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header))
|
|
#define ISIS_IIH_LAN_HEADER_SIZE (sizeof(struct isis_iih_lan_header))
|
|
#define ISIS_IIH_PTP_HEADER_SIZE (sizeof(struct isis_iih_ptp_header))
|
|
#define ISIS_LSP_HEADER_SIZE (sizeof(struct isis_lsp_header))
|
|
#define ISIS_CSNP_HEADER_SIZE (sizeof(struct isis_csnp_header))
|
|
#define ISIS_PSNP_HEADER_SIZE (sizeof(struct isis_psnp_header))
|
|
|
|
void isoclns_print(const u_int8_t *p, u_int length, u_int caplen)
|
|
{
|
|
const struct isis_common_header *header;
|
|
|
|
header = (const struct isis_common_header *)p;
|
|
|
|
if (caplen <= 1) { /* enough bytes on the wire ? */
|
|
printf("|OSI");
|
|
return;
|
|
}
|
|
|
|
if (eflag)
|
|
printf("OSI NLPID %s (0x%02x): ",
|
|
tok2str(nlpid_values,"Unknown",*p),
|
|
*p);
|
|
|
|
switch (*p) {
|
|
|
|
case NLPID_CLNP:
|
|
if (!clnp_print(p, length))
|
|
print_unknown_data(p,"\n\t",caplen);
|
|
break;
|
|
|
|
case NLPID_ESIS:
|
|
esis_print(p, length);
|
|
return;
|
|
|
|
case NLPID_ISIS:
|
|
if (!isis_print(p, length))
|
|
print_unknown_data(p,"\n\t",caplen);
|
|
break;
|
|
|
|
case NLPID_NULLNS:
|
|
(void)printf("%slength: %u",
|
|
eflag ? "" : ", ",
|
|
length);
|
|
break;
|
|
|
|
case NLPID_Q933:
|
|
q933_print(p+1, length-1);
|
|
break;
|
|
|
|
case NLPID_IP:
|
|
ip_print(gndo, p+1, length-1);
|
|
break;
|
|
|
|
#ifdef INET6
|
|
case NLPID_IP6:
|
|
ip6_print(p+1, length-1);
|
|
break;
|
|
#endif
|
|
|
|
case NLPID_PPP:
|
|
ppp_print(p+1, length-1);
|
|
break;
|
|
|
|
default:
|
|
if (!eflag)
|
|
printf("OSI NLPID 0x%02x unknown",*p);
|
|
(void)printf("%slength: %u",
|
|
eflag ? "" : ", ",
|
|
length);
|
|
if (caplen > 1)
|
|
print_unknown_data(p,"\n\t",caplen);
|
|
break;
|
|
}
|
|
}
|
|
|
|
#define CLNP_PDU_ER 1
|
|
#define CLNP_PDU_DT 28
|
|
#define CLNP_PDU_MD 29
|
|
#define CLNP_PDU_ERQ 30
|
|
#define CLNP_PDU_ERP 31
|
|
|
|
static struct tok clnp_pdu_values[] = {
|
|
{ CLNP_PDU_ER, "Error Report"},
|
|
{ CLNP_PDU_MD, "MD"},
|
|
{ CLNP_PDU_DT, "Data"},
|
|
{ CLNP_PDU_ERQ, "Echo Request"},
|
|
{ CLNP_PDU_ERP, "Echo Response"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
struct clnp_header_t {
|
|
u_int8_t nlpid;
|
|
u_int8_t length_indicator;
|
|
u_int8_t version;
|
|
u_int8_t lifetime; /* units of 500ms */
|
|
u_int8_t type;
|
|
u_int8_t segment_length[2];
|
|
u_int8_t cksum[2];
|
|
};
|
|
|
|
struct clnp_segment_header_t {
|
|
u_int8_t data_unit_id[2];
|
|
u_int8_t segment_offset[2];
|
|
u_int8_t total_length[2];
|
|
};
|
|
|
|
/*
|
|
* clnp_print
|
|
* Decode CLNP packets. Return 0 on error.
|
|
*/
|
|
|
|
static int clnp_print (const u_int8_t *pptr, u_int length)
|
|
{
|
|
const u_int8_t *optr,*source_address,*dest_address;
|
|
u_int li,tlen,nsap_offset,source_address_length,dest_address_length, clnp_pdu_type, clnp_flags;
|
|
const struct clnp_header_t *clnp_header;
|
|
const struct clnp_segment_header_t *clnp_segment_header;
|
|
u_int8_t rfd_error_major,rfd_error_minor;
|
|
|
|
clnp_header = (const struct clnp_header_t *) pptr;
|
|
TCHECK(*clnp_header);
|
|
|
|
li = clnp_header->length_indicator;
|
|
optr = pptr;
|
|
|
|
if (!eflag)
|
|
printf("CLNP");
|
|
|
|
/*
|
|
* Sanity checking of the header.
|
|
*/
|
|
|
|
if (clnp_header->version != CLNP_VERSION) {
|
|
printf("version %d packet not supported", clnp_header->version);
|
|
return (0);
|
|
}
|
|
|
|
/* FIXME further header sanity checking */
|
|
|
|
clnp_pdu_type = clnp_header->type & CLNP_PDU_TYPE_MASK;
|
|
clnp_flags = clnp_header->type & CLNP_FLAG_MASK;
|
|
|
|
pptr += sizeof(struct clnp_header_t);
|
|
li -= sizeof(struct clnp_header_t);
|
|
dest_address_length = *pptr;
|
|
dest_address = pptr + 1;
|
|
|
|
pptr += (1 + dest_address_length);
|
|
li -= (1 + dest_address_length);
|
|
source_address_length = *pptr;
|
|
source_address = pptr +1;
|
|
|
|
pptr += (1 + source_address_length);
|
|
li -= (1 + source_address_length);
|
|
|
|
if (vflag < 1) {
|
|
printf("%s%s > %s, %s, length %u",
|
|
eflag ? "" : ", ",
|
|
isonsap_string(source_address, source_address_length),
|
|
isonsap_string(dest_address, dest_address_length),
|
|
tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type),
|
|
length);
|
|
return (1);
|
|
}
|
|
printf("%slength %u",eflag ? "" : ", ",length);
|
|
|
|
printf("\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, Segment PDU length: %u, checksum: 0x%04x ",
|
|
tok2str(clnp_pdu_values, "unknown (%u)",clnp_pdu_type),
|
|
clnp_header->length_indicator,
|
|
clnp_header->version,
|
|
clnp_header->lifetime/2,
|
|
(clnp_header->lifetime%2)*5,
|
|
EXTRACT_16BITS(clnp_header->segment_length),
|
|
EXTRACT_16BITS(clnp_header->cksum));
|
|
|
|
/* do not attempt to verify the checksum if it is zero */
|
|
if (EXTRACT_16BITS(clnp_header->cksum) == 0)
|
|
printf("(unverified)");
|
|
else printf("(%s)", osi_cksum(optr, clnp_header->length_indicator) ? "incorrect" : "correct");
|
|
|
|
printf("\n\tFlags [%s]",
|
|
bittok2str(clnp_flag_values,"none",clnp_flags));
|
|
|
|
printf("\n\tsource address (length %u): %s\n\tdest address (length %u): %s",
|
|
source_address_length,
|
|
isonsap_string(source_address, source_address_length),
|
|
dest_address_length,
|
|
isonsap_string(dest_address,dest_address_length));
|
|
|
|
if (clnp_flags & CLNP_SEGMENT_PART) {
|
|
clnp_segment_header = (const struct clnp_segment_header_t *) pptr;
|
|
printf("\n\tData Unit ID: 0x%04x, Segment Offset: %u, Total PDU Length: %u",
|
|
EXTRACT_16BITS(clnp_segment_header->data_unit_id),
|
|
EXTRACT_16BITS(clnp_segment_header->segment_offset),
|
|
EXTRACT_16BITS(clnp_segment_header->total_length));
|
|
pptr+=sizeof(const struct clnp_segment_header_t);
|
|
li-=sizeof(const struct clnp_segment_header_t);
|
|
}
|
|
|
|
/* now walk the options */
|
|
while (li >= 2) {
|
|
u_int op, opli;
|
|
const u_int8_t *tptr;
|
|
|
|
TCHECK2(*pptr, 2);
|
|
if (li < 2) {
|
|
printf(", bad opts/li");
|
|
return (0);
|
|
}
|
|
op = *pptr++;
|
|
opli = *pptr++;
|
|
li -= 2;
|
|
TCHECK2(*pptr, opli);
|
|
if (opli > li) {
|
|
printf(", opt (%d) too long", op);
|
|
return (0);
|
|
}
|
|
li -= opli;
|
|
tptr = pptr;
|
|
tlen = opli;
|
|
|
|
printf("\n\t %s Option #%u, length %u, value: ",
|
|
tok2str(clnp_option_values,"Unknown",op),
|
|
op,
|
|
opli);
|
|
|
|
switch (op) {
|
|
|
|
|
|
case CLNP_OPTION_ROUTE_RECORDING: /* those two options share the format */
|
|
case CLNP_OPTION_SOURCE_ROUTING:
|
|
printf("%s %s",
|
|
tok2str(clnp_option_sr_rr_values,"Unknown",*tptr),
|
|
tok2str(clnp_option_sr_rr_string_values,"Unknown Option %u",op));
|
|
nsap_offset=*(tptr+1);
|
|
if (nsap_offset == 0) {
|
|
printf(" Bad NSAP offset (0)");
|
|
break;
|
|
}
|
|
nsap_offset-=1; /* offset to nsap list */
|
|
if (nsap_offset > tlen) {
|
|
printf(" Bad NSAP offset (past end of option)");
|
|
break;
|
|
}
|
|
tptr+=nsap_offset;
|
|
tlen-=nsap_offset;
|
|
while (tlen > 0) {
|
|
source_address_length=*tptr;
|
|
if (tlen < source_address_length+1) {
|
|
printf("\n\t NSAP address goes past end of option");
|
|
break;
|
|
}
|
|
if (source_address_length > 0) {
|
|
source_address=(tptr+1);
|
|
TCHECK2(*source_address, source_address_length);
|
|
printf("\n\t NSAP address (length %u): %s",
|
|
source_address_length,
|
|
isonsap_string(source_address, source_address_length));
|
|
}
|
|
tlen-=source_address_length+1;
|
|
}
|
|
break;
|
|
|
|
case CLNP_OPTION_PRIORITY:
|
|
printf("0x%1x", *tptr&0x0f);
|
|
break;
|
|
|
|
case CLNP_OPTION_QOS_MAINTENANCE:
|
|
printf("\n\t Format Code: %s",
|
|
tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK));
|
|
|
|
if ((*tptr&CLNP_OPTION_SCOPE_MASK) == CLNP_OPTION_SCOPE_GLOBAL)
|
|
printf("\n\t QoS Flags [%s]",
|
|
bittok2str(clnp_option_qos_global_values,
|
|
"none",
|
|
*tptr&CLNP_OPTION_OPTION_QOS_MASK));
|
|
break;
|
|
|
|
case CLNP_OPTION_SECURITY:
|
|
printf("\n\t Format Code: %s, Security-Level %u",
|
|
tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK),
|
|
*(tptr+1));
|
|
break;
|
|
|
|
case CLNP_OPTION_DISCARD_REASON:
|
|
rfd_error_major = (*tptr&0xf0) >> 4;
|
|
rfd_error_minor = *tptr&0x0f;
|
|
printf("\n\t Class: %s Error (0x%01x), %s (0x%01x)",
|
|
tok2str(clnp_option_rfd_class_values,"Unknown",rfd_error_major),
|
|
rfd_error_major,
|
|
tok2str(clnp_option_rfd_error_class[rfd_error_major],"Unknown",rfd_error_minor),
|
|
rfd_error_minor);
|
|
break;
|
|
|
|
case CLNP_OPTION_PADDING:
|
|
printf("padding data");
|
|
break;
|
|
|
|
/*
|
|
* FIXME those are the defined Options that lack a decoder
|
|
* you are welcome to contribute code ;-)
|
|
*/
|
|
|
|
default:
|
|
print_unknown_data(tptr,"\n\t ",opli);
|
|
break;
|
|
}
|
|
if (vflag > 1)
|
|
print_unknown_data(pptr,"\n\t ",opli);
|
|
pptr += opli;
|
|
}
|
|
|
|
switch (clnp_pdu_type) {
|
|
|
|
case CLNP_PDU_ER: /* fall through */
|
|
case CLNP_PDU_ERP:
|
|
TCHECK(*pptr);
|
|
if (*(pptr) == NLPID_CLNP) {
|
|
printf("\n\t-----original packet-----\n\t");
|
|
/* FIXME recursion protection */
|
|
clnp_print(pptr, length-clnp_header->length_indicator);
|
|
break;
|
|
}
|
|
|
|
case CLNP_PDU_DT:
|
|
case CLNP_PDU_MD:
|
|
case CLNP_PDU_ERQ:
|
|
|
|
default:
|
|
/* dump the PDU specific data */
|
|
if (length-(pptr-optr) > 0) {
|
|
printf("\n\t undecoded non-header data, length %u",length-clnp_header->length_indicator);
|
|
print_unknown_data(pptr,"\n\t ",length-(pptr-optr));
|
|
}
|
|
}
|
|
|
|
return (1);
|
|
|
|
trunc:
|
|
fputs("[|clnp]", stdout);
|
|
return (1);
|
|
|
|
}
|
|
|
|
|
|
#define ESIS_PDU_REDIRECT 6
|
|
#define ESIS_PDU_ESH 2
|
|
#define ESIS_PDU_ISH 4
|
|
|
|
static struct tok esis_pdu_values[] = {
|
|
{ ESIS_PDU_REDIRECT, "redirect"},
|
|
{ ESIS_PDU_ESH, "ESH"},
|
|
{ ESIS_PDU_ISH, "ISH"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
struct esis_header_t {
|
|
u_int8_t nlpid;
|
|
u_int8_t length_indicator;
|
|
u_int8_t version;
|
|
u_int8_t reserved;
|
|
u_int8_t type;
|
|
u_int8_t holdtime[2];
|
|
u_int8_t cksum[2];
|
|
};
|
|
|
|
static void
|
|
esis_print(const u_int8_t *pptr, u_int length)
|
|
{
|
|
const u_int8_t *optr;
|
|
u_int li,esis_pdu_type,source_address_length, source_address_number;
|
|
const struct esis_header_t *esis_header;
|
|
|
|
if (!eflag)
|
|
printf("ES-IS");
|
|
|
|
if (length <= 2) {
|
|
if (qflag)
|
|
printf("bad pkt!");
|
|
else
|
|
printf("no header at all!");
|
|
return;
|
|
}
|
|
|
|
esis_header = (const struct esis_header_t *) pptr;
|
|
TCHECK(*esis_header);
|
|
li = esis_header->length_indicator;
|
|
optr = pptr;
|
|
|
|
/*
|
|
* Sanity checking of the header.
|
|
*/
|
|
|
|
if (esis_header->nlpid != NLPID_ESIS) {
|
|
printf(" nlpid 0x%02x packet not supported", esis_header->nlpid);
|
|
return;
|
|
}
|
|
|
|
if (esis_header->version != ESIS_VERSION) {
|
|
printf(" version %d packet not supported", esis_header->version);
|
|
return;
|
|
}
|
|
|
|
if (li > length) {
|
|
printf(" length indicator(%d) > PDU size (%d)!", li, length);
|
|
return;
|
|
}
|
|
|
|
if (li < sizeof(struct esis_header_t) + 2) {
|
|
printf(" length indicator < min PDU size %d:", li);
|
|
while (--length != 0)
|
|
printf("%02X", *pptr++);
|
|
return;
|
|
}
|
|
|
|
esis_pdu_type = esis_header->type & ESIS_PDU_TYPE_MASK;
|
|
|
|
if (vflag < 1) {
|
|
printf("%s%s, length %u",
|
|
eflag ? "" : ", ",
|
|
tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type),
|
|
length);
|
|
return;
|
|
} else
|
|
printf("%slength %u\n\t%s (%u)",
|
|
eflag ? "" : ", ",
|
|
length,
|
|
tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type),
|
|
esis_pdu_type);
|
|
|
|
printf(", v: %u%s", esis_header->version, esis_header->version == ESIS_VERSION ? "" : "unsupported" );
|
|
printf(", checksum: 0x%04x ", EXTRACT_16BITS(esis_header->cksum));
|
|
/* do not attempt to verify the checksum if it is zero */
|
|
if (EXTRACT_16BITS(esis_header->cksum) == 0)
|
|
printf("(unverified)");
|
|
else
|
|
printf("(%s)", osi_cksum(pptr, li) ? "incorrect" : "correct");
|
|
|
|
printf(", holding time: %us, length indicator: %u",EXTRACT_16BITS(esis_header->holdtime),li);
|
|
|
|
if (vflag > 1)
|
|
print_unknown_data(optr,"\n\t",sizeof(struct esis_header_t));
|
|
|
|
pptr += sizeof(struct esis_header_t);
|
|
li -= sizeof(struct esis_header_t);
|
|
|
|
switch (esis_pdu_type) {
|
|
case ESIS_PDU_REDIRECT: {
|
|
const u_int8_t *dst, *snpa, *neta;
|
|
u_int dstl, snpal, netal;
|
|
|
|
TCHECK(*pptr);
|
|
if (li < 1) {
|
|
printf(", bad redirect/li");
|
|
return;
|
|
}
|
|
dstl = *pptr;
|
|
pptr++;
|
|
li--;
|
|
TCHECK2(*pptr, dstl);
|
|
if (li < dstl) {
|
|
printf(", bad redirect/li");
|
|
return;
|
|
}
|
|
dst = pptr;
|
|
pptr += dstl;
|
|
li -= dstl;
|
|
printf("\n\t %s", isonsap_string(dst,dstl));
|
|
|
|
TCHECK(*pptr);
|
|
if (li < 1) {
|
|
printf(", bad redirect/li");
|
|
return;
|
|
}
|
|
snpal = *pptr;
|
|
pptr++;
|
|
li--;
|
|
TCHECK2(*pptr, snpal);
|
|
if (li < snpal) {
|
|
printf(", bad redirect/li");
|
|
return;
|
|
}
|
|
snpa = pptr;
|
|
pptr += snpal;
|
|
li -= snpal;
|
|
TCHECK(*pptr);
|
|
if (li < 1) {
|
|
printf(", bad redirect/li");
|
|
return;
|
|
}
|
|
netal = *pptr;
|
|
pptr++;
|
|
TCHECK2(*pptr, netal);
|
|
if (li < netal) {
|
|
printf(", bad redirect/li");
|
|
return;
|
|
}
|
|
neta = pptr;
|
|
pptr += netal;
|
|
li -= netal;
|
|
|
|
if (netal == 0)
|
|
printf("\n\t %s", etheraddr_string(snpa));
|
|
else
|
|
printf("\n\t %s", isonsap_string(neta,netal));
|
|
break;
|
|
}
|
|
|
|
case ESIS_PDU_ESH:
|
|
TCHECK(*pptr);
|
|
if (li < 1) {
|
|
printf(", bad esh/li");
|
|
return;
|
|
}
|
|
source_address_number = *pptr;
|
|
pptr++;
|
|
li--;
|
|
|
|
printf("\n\t Number of Source Addresses: %u", source_address_number);
|
|
|
|
while (source_address_number > 0) {
|
|
TCHECK(*pptr);
|
|
if (li < 1) {
|
|
printf(", bad esh/li");
|
|
return;
|
|
}
|
|
source_address_length = *pptr;
|
|
pptr++;
|
|
li--;
|
|
|
|
TCHECK2(*pptr, source_address_length);
|
|
if (li < source_address_length) {
|
|
printf(", bad esh/li");
|
|
return;
|
|
}
|
|
printf("\n\t NET (length: %u): %s",
|
|
source_address_length,
|
|
isonsap_string(pptr,source_address_length));
|
|
pptr += source_address_length;
|
|
li -= source_address_length;
|
|
source_address_number--;
|
|
}
|
|
|
|
break;
|
|
|
|
case ESIS_PDU_ISH: {
|
|
TCHECK(*pptr);
|
|
if (li < 1) {
|
|
printf(", bad ish/li");
|
|
return;
|
|
}
|
|
source_address_length = *pptr;
|
|
pptr++;
|
|
li--;
|
|
TCHECK2(*pptr, source_address_length);
|
|
if (li < source_address_length) {
|
|
printf(", bad ish/li");
|
|
return;
|
|
}
|
|
printf("\n\t NET (length: %u): %s", source_address_length, isonsap_string(pptr, source_address_length));
|
|
pptr += source_address_length;
|
|
li -= source_address_length;
|
|
break;
|
|
}
|
|
|
|
default:
|
|
if (vflag <= 1) {
|
|
if (pptr < snapend)
|
|
print_unknown_data(pptr,"\n\t ",snapend-pptr);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* now walk the options */
|
|
while (li >= 2) {
|
|
u_int op, opli;
|
|
const u_int8_t *tptr;
|
|
|
|
TCHECK2(*pptr, 2);
|
|
if (li < 2) {
|
|
printf(", bad opts/li");
|
|
return;
|
|
}
|
|
op = *pptr++;
|
|
opli = *pptr++;
|
|
li -= 2;
|
|
if (opli > li) {
|
|
printf(", opt (%d) too long", op);
|
|
return;
|
|
}
|
|
li -= opli;
|
|
tptr = pptr;
|
|
|
|
printf("\n\t %s Option #%u, length %u, value: ",
|
|
tok2str(esis_option_values,"Unknown",op),
|
|
op,
|
|
opli);
|
|
|
|
switch (op) {
|
|
|
|
case ESIS_OPTION_ES_CONF_TIME:
|
|
TCHECK2(*pptr, 2);
|
|
printf("%us", EXTRACT_16BITS(tptr));
|
|
break;
|
|
|
|
case ESIS_OPTION_PROTOCOLS:
|
|
while (opli>0) {
|
|
TCHECK(*pptr);
|
|
printf("%s (0x%02x)",
|
|
tok2str(nlpid_values,
|
|
"unknown",
|
|
*tptr),
|
|
*tptr);
|
|
if (opli>1) /* further NPLIDs ? - put comma */
|
|
printf(", ");
|
|
tptr++;
|
|
opli--;
|
|
}
|
|
break;
|
|
|
|
/*
|
|
* FIXME those are the defined Options that lack a decoder
|
|
* you are welcome to contribute code ;-)
|
|
*/
|
|
|
|
case ESIS_OPTION_QOS_MAINTENANCE:
|
|
case ESIS_OPTION_SECURITY:
|
|
case ESIS_OPTION_PRIORITY:
|
|
case ESIS_OPTION_ADDRESS_MASK:
|
|
case ESIS_OPTION_SNPA_MASK:
|
|
|
|
default:
|
|
print_unknown_data(tptr,"\n\t ",opli);
|
|
break;
|
|
}
|
|
if (vflag > 1)
|
|
print_unknown_data(pptr,"\n\t ",opli);
|
|
pptr += opli;
|
|
}
|
|
trunc:
|
|
return;
|
|
}
|
|
|
|
/* shared routine for printing system, node and lsp-ids */
|
|
static char *
|
|
isis_print_id(const u_int8_t *cp, int id_len)
|
|
{
|
|
int i;
|
|
static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")];
|
|
char *pos = id;
|
|
|
|
for (i = 1; i <= SYSTEM_ID_LEN; i++) {
|
|
snprintf(pos, sizeof(id) - (pos - id), "%02x", *cp++);
|
|
pos += strlen(pos);
|
|
if (i == 2 || i == 4)
|
|
*pos++ = '.';
|
|
}
|
|
if (id_len >= NODE_ID_LEN) {
|
|
snprintf(pos, sizeof(id) - (pos - id), ".%02x", *cp++);
|
|
pos += strlen(pos);
|
|
}
|
|
if (id_len == LSP_ID_LEN)
|
|
snprintf(pos, sizeof(id) - (pos - id), "-%02x", *cp);
|
|
return (id);
|
|
}
|
|
|
|
/* print the 4-byte metric block which is common found in the old-style TLVs */
|
|
static int
|
|
isis_print_metric_block (const struct isis_metric_block *isis_metric_block)
|
|
{
|
|
printf(", Default Metric: %d, %s",
|
|
ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default),
|
|
ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal");
|
|
if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay))
|
|
printf("\n\t\t Delay Metric: %d, %s",
|
|
ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay),
|
|
ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal");
|
|
if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense))
|
|
printf("\n\t\t Expense Metric: %d, %s",
|
|
ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense),
|
|
ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal");
|
|
if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error))
|
|
printf("\n\t\t Error Metric: %d, %s",
|
|
ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error),
|
|
ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal");
|
|
|
|
return(1); /* everything is ok */
|
|
}
|
|
|
|
static int
|
|
isis_print_tlv_ip_reach (const u_int8_t *cp, const char *ident, int length)
|
|
{
|
|
int prefix_len;
|
|
const struct isis_tlv_ip_reach *tlv_ip_reach;
|
|
|
|
tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp;
|
|
|
|
while (length > 0) {
|
|
if ((size_t)length < sizeof(*tlv_ip_reach)) {
|
|
printf("short IPv4 Reachability (%d vs %lu)",
|
|
length,
|
|
(unsigned long)sizeof(*tlv_ip_reach));
|
|
return (0);
|
|
}
|
|
|
|
if (!TTEST(*tlv_ip_reach))
|
|
return (0);
|
|
|
|
prefix_len = mask2plen(EXTRACT_32BITS(tlv_ip_reach->mask));
|
|
|
|
if (prefix_len == -1)
|
|
printf("%sIPv4 prefix: %s mask %s",
|
|
ident,
|
|
ipaddr_string((tlv_ip_reach->prefix)),
|
|
ipaddr_string((tlv_ip_reach->mask)));
|
|
else
|
|
printf("%sIPv4 prefix: %15s/%u",
|
|
ident,
|
|
ipaddr_string((tlv_ip_reach->prefix)),
|
|
prefix_len);
|
|
|
|
printf(", Distribution: %s, Metric: %u, %s",
|
|
ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up",
|
|
ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default),
|
|
ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal");
|
|
|
|
if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay))
|
|
printf("%s Delay Metric: %u, %s",
|
|
ident,
|
|
ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay),
|
|
ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal");
|
|
|
|
if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense))
|
|
printf("%s Expense Metric: %u, %s",
|
|
ident,
|
|
ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense),
|
|
ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal");
|
|
|
|
if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error))
|
|
printf("%s Error Metric: %u, %s",
|
|
ident,
|
|
ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error),
|
|
ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal");
|
|
|
|
length -= sizeof(struct isis_tlv_ip_reach);
|
|
tlv_ip_reach++;
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* this is the common IP-REACH subTLV decoder it is called
|
|
* from various EXTD-IP REACH TLVs (135,235,236,237)
|
|
*/
|
|
|
|
static int
|
|
isis_print_ip_reach_subtlv (const u_int8_t *tptr,int subt,int subl,const char *ident) {
|
|
|
|
/* first lets see if we know the subTLVs name*/
|
|
printf("%s%s subTLV #%u, length: %u",
|
|
ident,
|
|
tok2str(isis_ext_ip_reach_subtlv_values,
|
|
"unknown",
|
|
subt),
|
|
subt,
|
|
subl);
|
|
|
|
if (!TTEST2(*tptr,subl))
|
|
goto trunctlv;
|
|
|
|
switch(subt) {
|
|
case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */
|
|
case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32:
|
|
while (subl >= 4) {
|
|
printf(", 0x%08x (=%u)",
|
|
EXTRACT_32BITS(tptr),
|
|
EXTRACT_32BITS(tptr));
|
|
tptr+=4;
|
|
subl-=4;
|
|
}
|
|
break;
|
|
case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64:
|
|
while (subl >= 8) {
|
|
printf(", 0x%08x%08x",
|
|
EXTRACT_32BITS(tptr),
|
|
EXTRACT_32BITS(tptr+4));
|
|
tptr+=8;
|
|
subl-=8;
|
|
}
|
|
break;
|
|
default:
|
|
if(!print_unknown_data(tptr,"\n\t\t ",
|
|
subl))
|
|
return(0);
|
|
break;
|
|
}
|
|
return(1);
|
|
|
|
trunctlv:
|
|
printf("%spacket exceeded snapshot",ident);
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* this is the common IS-REACH subTLV decoder it is called
|
|
* from isis_print_ext_is_reach()
|
|
*/
|
|
|
|
static int
|
|
isis_print_is_reach_subtlv (const u_int8_t *tptr,int subt,int subl,const char *ident) {
|
|
|
|
int priority_level,bandwidth_constraint;
|
|
union { /* int to float conversion buffer for several subTLVs */
|
|
float f;
|
|
u_int32_t i;
|
|
} bw;
|
|
|
|
/* first lets see if we know the subTLVs name*/
|
|
printf("%s%s subTLV #%u, length: %u",
|
|
ident,
|
|
tok2str(isis_ext_is_reach_subtlv_values,
|
|
"unknown",
|
|
subt),
|
|
subt,
|
|
subl);
|
|
|
|
if (!TTEST2(*tptr,subl))
|
|
goto trunctlv;
|
|
|
|
switch(subt) {
|
|
case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP:
|
|
case ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID:
|
|
case ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID:
|
|
if (subl >= 4) {
|
|
printf(", 0x%08x", EXTRACT_32BITS(tptr));
|
|
if (subl == 8) /* draft-ietf-isis-gmpls-extensions */
|
|
printf(", 0x%08x", EXTRACT_32BITS(tptr+4));
|
|
}
|
|
break;
|
|
case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR:
|
|
case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR:
|
|
if (subl >= 4)
|
|
printf(", %s", ipaddr_string(tptr));
|
|
break;
|
|
case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW :
|
|
case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW:
|
|
if (subl >= 4) {
|
|
bw.i = EXTRACT_32BITS(tptr);
|
|
printf(", %.3f Mbps", bw.f*8/1000000 );
|
|
}
|
|
break;
|
|
case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW :
|
|
if (subl >= 32) {
|
|
for (priority_level = 0; priority_level < 8; priority_level++) {
|
|
bw.i = EXTRACT_32BITS(tptr);
|
|
printf("%s priority level %d: %.3f Mbps",
|
|
ident,
|
|
priority_level,
|
|
bw.f*8/1000000 );
|
|
tptr+=4;
|
|
}
|
|
}
|
|
break;
|
|
case ISIS_SUBTLV_EXT_IS_REACH_DIFFSERV_TE:
|
|
printf("%sBandwidth Constraints Model ID: %s (%u)",
|
|
ident,
|
|
tok2str(diffserv_te_bc_values, "unknown", *tptr),
|
|
*tptr);
|
|
tptr++;
|
|
/* decode BCs until the subTLV ends */
|
|
for (bandwidth_constraint = 0; bandwidth_constraint < (subl-1)/4; bandwidth_constraint++) {
|
|
bw.i = EXTRACT_32BITS(tptr);
|
|
printf("%s Bandwidth constraint %d: %.3f Mbps",
|
|
ident,
|
|
bandwidth_constraint,
|
|
bw.f*8/1000000 );
|
|
tptr+=4;
|
|
}
|
|
break;
|
|
case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC:
|
|
if (subl >= 3)
|
|
printf(", %u", EXTRACT_24BITS(tptr));
|
|
break;
|
|
case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE:
|
|
if (subl >= 2) {
|
|
printf(", %s, Priority %u",
|
|
bittok2str(gmpls_link_prot_values, "none", *tptr),
|
|
*(tptr+1));
|
|
}
|
|
break;
|
|
case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR:
|
|
if (subl >= 36) {
|
|
printf("%s Interface Switching Capability:%s",
|
|
ident,
|
|
tok2str(gmpls_switch_cap_values, "Unknown", *(tptr)));
|
|
printf(", LSP Encoding: %s",
|
|
tok2str(gmpls_encoding_values, "Unknown", *(tptr+1)));
|
|
tptr+=4;
|
|
printf("%s Max LSP Bandwidth:",ident);
|
|
for (priority_level = 0; priority_level < 8; priority_level++) {
|
|
bw.i = EXTRACT_32BITS(tptr);
|
|
printf("%s priority level %d: %.3f Mbps",
|
|
ident,
|
|
priority_level,
|
|
bw.f*8/1000000 );
|
|
tptr+=4;
|
|
}
|
|
subl-=36;
|
|
/* there is some optional stuff left to decode but this is as of yet
|
|
not specified so just lets hexdump what is left */
|
|
if(subl>0){
|
|
if(!print_unknown_data(tptr,"\n\t\t ",
|
|
subl))
|
|
return(0);
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
if(!print_unknown_data(tptr,"\n\t\t ",
|
|
subl))
|
|
return(0);
|
|
break;
|
|
}
|
|
return(1);
|
|
|
|
trunctlv:
|
|
printf("%spacket exceeded snapshot",ident);
|
|
return(0);
|
|
}
|
|
|
|
|
|
/*
|
|
* this is the common IS-REACH decoder it is called
|
|
* from various EXTD-IS REACH style TLVs (22,24,222)
|
|
*/
|
|
|
|
static int
|
|
isis_print_ext_is_reach (const u_int8_t *tptr,const char *ident, int tlv_type) {
|
|
|
|
char ident_buffer[20];
|
|
int subtlv_type,subtlv_len,subtlv_sum_len;
|
|
int proc_bytes = 0; /* how many bytes did we process ? */
|
|
|
|
if (!TTEST2(*tptr, NODE_ID_LEN))
|
|
return(0);
|
|
|
|
printf("%sIS Neighbor: %s", ident, isis_print_id(tptr, NODE_ID_LEN));
|
|
tptr+=(NODE_ID_LEN);
|
|
|
|
if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */
|
|
if (!TTEST2(*tptr, 3)) /* and is therefore skipped */
|
|
return(0);
|
|
printf(", Metric: %d",EXTRACT_24BITS(tptr));
|
|
tptr+=3;
|
|
}
|
|
|
|
if (!TTEST2(*tptr, 1))
|
|
return(0);
|
|
subtlv_sum_len=*(tptr++); /* read out subTLV length */
|
|
proc_bytes=NODE_ID_LEN+3+1;
|
|
printf(", %ssub-TLVs present",subtlv_sum_len ? "" : "no ");
|
|
if (subtlv_sum_len) {
|
|
printf(" (%u)",subtlv_sum_len);
|
|
while (subtlv_sum_len>0) {
|
|
if (!TTEST2(*tptr,2))
|
|
return(0);
|
|
subtlv_type=*(tptr++);
|
|
subtlv_len=*(tptr++);
|
|
/* prepend the ident string */
|
|
snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
|
|
if(!isis_print_is_reach_subtlv(tptr,subtlv_type,subtlv_len,ident_buffer))
|
|
return(0);
|
|
tptr+=subtlv_len;
|
|
subtlv_sum_len-=(subtlv_len+2);
|
|
proc_bytes+=(subtlv_len+2);
|
|
}
|
|
}
|
|
return(proc_bytes);
|
|
}
|
|
|
|
/*
|
|
* this is the common Multi Topology ID decoder
|
|
* it is called from various MT-TLVs (222,229,235,237)
|
|
*/
|
|
|
|
static int
|
|
isis_print_mtid (const u_int8_t *tptr,const char *ident) {
|
|
|
|
if (!TTEST2(*tptr, 2))
|
|
return(0);
|
|
|
|
printf("%s%s",
|
|
ident,
|
|
tok2str(isis_mt_values,
|
|
"Reserved for IETF Consensus",
|
|
ISIS_MASK_MTID(EXTRACT_16BITS(tptr))));
|
|
|
|
printf(" Topology (0x%03x), Flags: [%s]",
|
|
ISIS_MASK_MTID(EXTRACT_16BITS(tptr)),
|
|
bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(EXTRACT_16BITS(tptr))));
|
|
|
|
return(2);
|
|
}
|
|
|
|
/*
|
|
* this is the common extended IP reach decoder
|
|
* it is called from TLVs (135,235,236,237)
|
|
* we process the TLV and optional subTLVs and return
|
|
* the amount of processed bytes
|
|
*/
|
|
|
|
static int
|
|
isis_print_extd_ip_reach (const u_int8_t *tptr, const char *ident, u_int16_t afi) {
|
|
|
|
char ident_buffer[20];
|
|
u_int8_t prefix[16]; /* shared copy buffer for IPv4 and IPv6 prefixes */
|
|
u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen;
|
|
|
|
if (!TTEST2(*tptr, 4))
|
|
return (0);
|
|
metric = EXTRACT_32BITS(tptr);
|
|
processed=4;
|
|
tptr+=4;
|
|
|
|
if (afi == IPV4) {
|
|
if (!TTEST2(*tptr, 1)) /* fetch status byte */
|
|
return (0);
|
|
status_byte=*(tptr++);
|
|
bit_length = status_byte&0x3f;
|
|
processed++;
|
|
#ifdef INET6
|
|
} else if (afi == IPV6) {
|
|
if (!TTEST2(*tptr, 1)) /* fetch status & prefix_len byte */
|
|
return (0);
|
|
status_byte=*(tptr++);
|
|
bit_length=*(tptr++);
|
|
processed+=2;
|
|
#endif
|
|
} else
|
|
return (0); /* somebody is fooling us */
|
|
|
|
byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */
|
|
|
|
if (!TTEST2(*tptr, byte_length))
|
|
return (0);
|
|
memset(prefix, 0, 16); /* clear the copy buffer */
|
|
memcpy(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */
|
|
tptr+=byte_length;
|
|
processed+=byte_length;
|
|
|
|
if (afi == IPV4)
|
|
printf("%sIPv4 prefix: %15s/%u",
|
|
ident,
|
|
ipaddr_string(prefix),
|
|
bit_length);
|
|
#ifdef INET6
|
|
if (afi == IPV6)
|
|
printf("%sIPv6 prefix: %s/%u",
|
|
ident,
|
|
ip6addr_string(prefix),
|
|
bit_length);
|
|
#endif
|
|
|
|
printf(", Distribution: %s, Metric: %u",
|
|
ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up",
|
|
metric);
|
|
|
|
if (afi == IPV4 && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
|
|
printf(", sub-TLVs present");
|
|
#ifdef INET6
|
|
if (afi == IPV6)
|
|
printf(", %s%s",
|
|
ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal",
|
|
ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : "");
|
|
#endif
|
|
|
|
if ((ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte) && afi == IPV4) ||
|
|
(ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) && afi == IPV6)) {
|
|
/* assume that one prefix can hold more
|
|
than one subTLV - therefore the first byte must reflect
|
|
the aggregate bytecount of the subTLVs for this prefix
|
|
*/
|
|
if (!TTEST2(*tptr, 1))
|
|
return (0);
|
|
sublen=*(tptr++);
|
|
processed+=sublen+1;
|
|
printf(" (%u)",sublen); /* print out subTLV length */
|
|
|
|
while (sublen>0) {
|
|
if (!TTEST2(*tptr,2))
|
|
return (0);
|
|
subtlvtype=*(tptr++);
|
|
subtlvlen=*(tptr++);
|
|
/* prepend the ident string */
|
|
snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
|
|
if(!isis_print_ip_reach_subtlv(tptr,subtlvtype,subtlvlen,ident_buffer))
|
|
return(0);
|
|
tptr+=subtlvlen;
|
|
sublen-=(subtlvlen+2);
|
|
}
|
|
}
|
|
return (processed);
|
|
}
|
|
|
|
/*
|
|
* isis_print
|
|
* Decode IS-IS packets. Return 0 on error.
|
|
*/
|
|
|
|
static int isis_print (const u_int8_t *p, u_int length)
|
|
{
|
|
const struct isis_common_header *isis_header;
|
|
|
|
const struct isis_iih_lan_header *header_iih_lan;
|
|
const struct isis_iih_ptp_header *header_iih_ptp;
|
|
const struct isis_lsp_header *header_lsp;
|
|
const struct isis_csnp_header *header_csnp;
|
|
const struct isis_psnp_header *header_psnp;
|
|
|
|
const struct isis_tlv_lsp *tlv_lsp;
|
|
const struct isis_tlv_ptp_adj *tlv_ptp_adj;
|
|
const struct isis_tlv_is_reach *tlv_is_reach;
|
|
const struct isis_tlv_es_reach *tlv_es_reach;
|
|
|
|
u_int8_t pdu_type, max_area, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len;
|
|
u_int8_t ext_is_len, ext_ip_len, mt_len;
|
|
const u_int8_t *optr, *pptr, *tptr;
|
|
u_short packet_len,pdu_len;
|
|
u_int i,vendor_id;
|
|
|
|
packet_len=length;
|
|
optr = p; /* initialize the _o_riginal pointer to the packet start -
|
|
need it for parsing the checksum TLV */
|
|
isis_header = (const struct isis_common_header *)p;
|
|
TCHECK(*isis_header);
|
|
pptr = p+(ISIS_COMMON_HEADER_SIZE);
|
|
header_iih_lan = (const struct isis_iih_lan_header *)pptr;
|
|
header_iih_ptp = (const struct isis_iih_ptp_header *)pptr;
|
|
header_lsp = (const struct isis_lsp_header *)pptr;
|
|
header_csnp = (const struct isis_csnp_header *)pptr;
|
|
header_psnp = (const struct isis_psnp_header *)pptr;
|
|
|
|
if (!eflag)
|
|
printf("IS-IS");
|
|
|
|
/*
|
|
* Sanity checking of the header.
|
|
*/
|
|
|
|
if (isis_header->version != ISIS_VERSION) {
|
|
printf("version %d packet not supported", isis_header->version);
|
|
return (0);
|
|
}
|
|
|
|
if ((isis_header->id_length != SYSTEM_ID_LEN) && (isis_header->id_length != 0)) {
|
|
printf("system ID length of %d is not supported",
|
|
isis_header->id_length);
|
|
return (0);
|
|
}
|
|
|
|
if (isis_header->pdu_version != ISIS_VERSION) {
|
|
printf("version %d packet not supported", isis_header->pdu_version);
|
|
return (0);
|
|
}
|
|
|
|
max_area = isis_header->max_area;
|
|
switch(max_area) {
|
|
case 0:
|
|
max_area = 3; /* silly shit */
|
|
break;
|
|
case 255:
|
|
printf("bad packet -- 255 areas");
|
|
return (0);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
id_length = isis_header->id_length;
|
|
switch(id_length) {
|
|
case 0:
|
|
id_length = 6; /* silly shit again */
|
|
break;
|
|
case 1: /* 1-8 are valid sys-ID lenghts */
|
|
case 2:
|
|
case 3:
|
|
case 4:
|
|
case 5:
|
|
case 6:
|
|
case 7:
|
|
case 8:
|
|
break;
|
|
case 255:
|
|
id_length = 0; /* entirely useless */
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* toss any non 6-byte sys-ID len PDUs */
|
|
if (id_length != 6 ) {
|
|
printf("bad packet -- illegal sys-ID length (%u)", id_length);
|
|
return (0);
|
|
}
|
|
|
|
pdu_type=isis_header->pdu_type;
|
|
|
|
/* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/
|
|
if (vflag < 1) {
|
|
printf("%s%s",
|
|
eflag ? "" : ", ",
|
|
tok2str(isis_pdu_values,"unknown PDU-Type %u",pdu_type));
|
|
|
|
switch (pdu_type) {
|
|
|
|
case ISIS_PDU_L1_LAN_IIH:
|
|
case ISIS_PDU_L2_LAN_IIH:
|
|
printf(", src-id %s",
|
|
isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN));
|
|
printf(", lan-id %s, prio %u",
|
|
isis_print_id(header_iih_lan->lan_id,NODE_ID_LEN),
|
|
header_iih_lan->priority);
|
|
break;
|
|
case ISIS_PDU_PTP_IIH:
|
|
printf(", src-id %s", isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN));
|
|
break;
|
|
case ISIS_PDU_L1_LSP:
|
|
case ISIS_PDU_L2_LSP:
|
|
printf(", lsp-id %s, seq 0x%08x, lifetime %5us",
|
|
isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
|
|
EXTRACT_32BITS(header_lsp->sequence_number),
|
|
EXTRACT_16BITS(header_lsp->remaining_lifetime));
|
|
break;
|
|
case ISIS_PDU_L1_CSNP:
|
|
case ISIS_PDU_L2_CSNP:
|
|
printf(", src-id %s", isis_print_id(header_csnp->source_id,NODE_ID_LEN));
|
|
break;
|
|
case ISIS_PDU_L1_PSNP:
|
|
case ISIS_PDU_L2_PSNP:
|
|
printf(", src-id %s", isis_print_id(header_psnp->source_id,NODE_ID_LEN));
|
|
break;
|
|
|
|
}
|
|
printf(", length %u", length);
|
|
|
|
return(1);
|
|
}
|
|
|
|
/* ok they seem to want to know everything - lets fully decode it */
|
|
printf("%slength %u", eflag ? "" : ", ",length);
|
|
|
|
printf("\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)",
|
|
tok2str(isis_pdu_values,
|
|
"unknown, type %u",
|
|
pdu_type),
|
|
isis_header->fixed_len,
|
|
isis_header->version,
|
|
isis_header->pdu_version,
|
|
id_length,
|
|
isis_header->id_length,
|
|
max_area,
|
|
isis_header->max_area);
|
|
|
|
if (vflag > 1) {
|
|
if(!print_unknown_data(optr,"\n\t",8)) /* provide the _o_riginal pointer */
|
|
return(0); /* for optionally debugging the common header */
|
|
}
|
|
|
|
switch (pdu_type) {
|
|
|
|
case ISIS_PDU_L1_LAN_IIH:
|
|
case ISIS_PDU_L2_LAN_IIH:
|
|
if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) {
|
|
printf(", bogus fixed header length %u should be %lu",
|
|
isis_header->fixed_len, (unsigned long)ISIS_IIH_LAN_HEADER_SIZE);
|
|
return (0);
|
|
}
|
|
|
|
pdu_len=EXTRACT_16BITS(header_iih_lan->pdu_len);
|
|
if (packet_len>pdu_len) {
|
|
packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
|
|
length=pdu_len;
|
|
}
|
|
|
|
TCHECK(*header_iih_lan);
|
|
printf("\n\t source-id: %s, holding time: %us, Flags: [%s]",
|
|
isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN),
|
|
EXTRACT_16BITS(header_iih_lan->holding_time),
|
|
tok2str(isis_iih_circuit_type_values,
|
|
"unknown circuit type 0x%02x",
|
|
header_iih_lan->circuit_type));
|
|
|
|
printf("\n\t lan-id: %s, Priority: %u, PDU length: %u",
|
|
isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN),
|
|
(header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK,
|
|
pdu_len);
|
|
|
|
if (vflag > 1) {
|
|
if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_LAN_HEADER_SIZE))
|
|
return(0);
|
|
}
|
|
|
|
packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
|
|
pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
|
|
break;
|
|
|
|
case ISIS_PDU_PTP_IIH:
|
|
if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) {
|
|
printf(", bogus fixed header length %u should be %lu",
|
|
isis_header->fixed_len, (unsigned long)ISIS_IIH_PTP_HEADER_SIZE);
|
|
return (0);
|
|
}
|
|
|
|
pdu_len=EXTRACT_16BITS(header_iih_ptp->pdu_len);
|
|
if (packet_len>pdu_len) {
|
|
packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
|
|
length=pdu_len;
|
|
}
|
|
|
|
TCHECK(*header_iih_ptp);
|
|
printf("\n\t source-id: %s, holding time: %us, Flags: [%s]",
|
|
isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN),
|
|
EXTRACT_16BITS(header_iih_ptp->holding_time),
|
|
tok2str(isis_iih_circuit_type_values,
|
|
"unknown circuit type 0x%02x",
|
|
header_iih_ptp->circuit_type));
|
|
|
|
printf("\n\t circuit-id: 0x%02x, PDU length: %u",
|
|
header_iih_ptp->circuit_id,
|
|
pdu_len);
|
|
|
|
if (vflag > 1) {
|
|
if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_PTP_HEADER_SIZE))
|
|
return(0);
|
|
}
|
|
|
|
packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
|
|
pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
|
|
break;
|
|
|
|
case ISIS_PDU_L1_LSP:
|
|
case ISIS_PDU_L2_LSP:
|
|
if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) {
|
|
printf(", bogus fixed header length %u should be %lu",
|
|
isis_header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE);
|
|
return (0);
|
|
}
|
|
|
|
pdu_len=EXTRACT_16BITS(header_lsp->pdu_len);
|
|
if (packet_len>pdu_len) {
|
|
packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
|
|
length=pdu_len;
|
|
}
|
|
|
|
TCHECK(*header_lsp);
|
|
printf("\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x",
|
|
isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
|
|
EXTRACT_32BITS(header_lsp->sequence_number),
|
|
EXTRACT_16BITS(header_lsp->remaining_lifetime),
|
|
EXTRACT_16BITS(header_lsp->checksum));
|
|
|
|
/* if this is a purge do not attempt to verify the checksum */
|
|
if ( EXTRACT_16BITS(header_lsp->remaining_lifetime) == 0 &&
|
|
EXTRACT_16BITS(header_lsp->checksum) == 0)
|
|
printf(" (purged)");
|
|
else
|
|
/* verify the checksum -
|
|
* checking starts at the lsp-id field at byte position [12]
|
|
* hence the length needs to be reduced by 12 bytes */
|
|
printf(" (%s)", (osi_cksum((u_int8_t *)header_lsp->lsp_id, length-12)) ? "incorrect" : "correct");
|
|
|
|
printf(", PDU length: %u, Flags: [ %s",
|
|
pdu_len,
|
|
ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : "");
|
|
|
|
if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) {
|
|
printf("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : "");
|
|
printf("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : "");
|
|
printf("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : "");
|
|
printf("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : "");
|
|
printf("ATT bit set, ");
|
|
}
|
|
printf("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : "");
|
|
printf("%s ]", tok2str(isis_lsp_istype_values,"Unknown(0x%x)",ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock)));
|
|
|
|
if (vflag > 1) {
|
|
if(!print_unknown_data(pptr,"\n\t ",ISIS_LSP_HEADER_SIZE))
|
|
return(0);
|
|
}
|
|
|
|
packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
|
|
pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
|
|
break;
|
|
|
|
case ISIS_PDU_L1_CSNP:
|
|
case ISIS_PDU_L2_CSNP:
|
|
if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) {
|
|
printf(", bogus fixed header length %u should be %lu",
|
|
isis_header->fixed_len, (unsigned long)ISIS_CSNP_HEADER_SIZE);
|
|
return (0);
|
|
}
|
|
|
|
pdu_len=EXTRACT_16BITS(header_csnp->pdu_len);
|
|
if (packet_len>pdu_len) {
|
|
packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
|
|
length=pdu_len;
|
|
}
|
|
|
|
TCHECK(*header_csnp);
|
|
printf("\n\t source-id: %s, PDU length: %u",
|
|
isis_print_id(header_csnp->source_id, NODE_ID_LEN),
|
|
pdu_len);
|
|
printf("\n\t start lsp-id: %s",
|
|
isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN));
|
|
printf("\n\t end lsp-id: %s",
|
|
isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN));
|
|
|
|
if (vflag > 1) {
|
|
if(!print_unknown_data(pptr,"\n\t ",ISIS_CSNP_HEADER_SIZE))
|
|
return(0);
|
|
}
|
|
|
|
packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
|
|
pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
|
|
break;
|
|
|
|
case ISIS_PDU_L1_PSNP:
|
|
case ISIS_PDU_L2_PSNP:
|
|
if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) {
|
|
printf("- bogus fixed header length %u should be %lu",
|
|
isis_header->fixed_len, (unsigned long)ISIS_PSNP_HEADER_SIZE);
|
|
return (0);
|
|
}
|
|
|
|
pdu_len=EXTRACT_16BITS(header_psnp->pdu_len);
|
|
if (packet_len>pdu_len) {
|
|
packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
|
|
length=pdu_len;
|
|
}
|
|
|
|
TCHECK(*header_psnp);
|
|
printf("\n\t source-id: %s, PDU length: %u",
|
|
isis_print_id(header_psnp->source_id, NODE_ID_LEN),
|
|
pdu_len);
|
|
|
|
if (vflag > 1) {
|
|
if(!print_unknown_data(pptr,"\n\t ",ISIS_PSNP_HEADER_SIZE))
|
|
return(0);
|
|
}
|
|
|
|
packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
|
|
pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
|
|
break;
|
|
|
|
default:
|
|
if(!print_unknown_data(pptr,"\n\t ",length))
|
|
return(0);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Now print the TLV's.
|
|
*/
|
|
|
|
while (packet_len >= 2) {
|
|
if (pptr == snapend) {
|
|
return (1);
|
|
}
|
|
|
|
if (!TTEST2(*pptr, 2)) {
|
|
printf("\n\t\t packet exceeded snapshot (%ld) bytes",
|
|
(long)(pptr-snapend));
|
|
return (1);
|
|
}
|
|
tlv_type = *pptr++;
|
|
tlv_len = *pptr++;
|
|
tmp =tlv_len; /* copy temporary len & pointer to packet data */
|
|
tptr = pptr;
|
|
packet_len -= 2;
|
|
if (tlv_len > packet_len) {
|
|
break;
|
|
}
|
|
|
|
/* first lets see if we know the TLVs name*/
|
|
printf("\n\t %s TLV #%u, length: %u",
|
|
tok2str(isis_tlv_values,
|
|
"unknown",
|
|
tlv_type),
|
|
tlv_type,
|
|
tlv_len);
|
|
|
|
if (tlv_len == 0) /* something is malformed */
|
|
break;
|
|
|
|
/* now check if we have a decoder otherwise do a hexdump at the end*/
|
|
switch (tlv_type) {
|
|
case ISIS_TLV_AREA_ADDR:
|
|
if (!TTEST2(*tptr, 1))
|
|
goto trunctlv;
|
|
alen = *tptr++;
|
|
while (tmp && alen < tmp) {
|
|
printf("\n\t Area address (length: %u): %s",
|
|
alen,
|
|
isonsap_string(tptr,alen));
|
|
tptr += alen;
|
|
tmp -= alen + 1;
|
|
if (tmp==0) /* if this is the last area address do not attemt a boundary check */
|
|
break;
|
|
if (!TTEST2(*tptr, 1))
|
|
goto trunctlv;
|
|
alen = *tptr++;
|
|
}
|
|
break;
|
|
case ISIS_TLV_ISNEIGH:
|
|
while (tmp >= ETHER_ADDR_LEN) {
|
|
if (!TTEST2(*tptr, ETHER_ADDR_LEN))
|
|
goto trunctlv;
|
|
printf("\n\t SNPA: %s",isis_print_id(tptr,ETHER_ADDR_LEN));
|
|
tmp -= ETHER_ADDR_LEN;
|
|
tptr += ETHER_ADDR_LEN;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_ISNEIGH_VARLEN:
|
|
if (!TTEST2(*tptr, 1) || tmp < 3) /* min. TLV length */
|
|
goto trunctlv;
|
|
lan_alen = *tptr++; /* LAN address length */
|
|
if (lan_alen == 0) {
|
|
printf("\n\t LAN address length 0 bytes (invalid)");
|
|
break;
|
|
}
|
|
tmp --;
|
|
printf("\n\t LAN address length %u bytes ",lan_alen);
|
|
while (tmp >= lan_alen) {
|
|
if (!TTEST2(*tptr, lan_alen))
|
|
goto trunctlv;
|
|
printf("\n\t\tIS Neighbor: %s",isis_print_id(tptr,lan_alen));
|
|
tmp -= lan_alen;
|
|
tptr +=lan_alen;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_PADDING:
|
|
break;
|
|
|
|
case ISIS_TLV_MT_IS_REACH:
|
|
while (tmp >= 2+NODE_ID_LEN+3+1) {
|
|
mt_len = isis_print_mtid(tptr, "\n\t ");
|
|
if (mt_len == 0) /* did something go wrong ? */
|
|
goto trunctlv;
|
|
tptr+=mt_len;
|
|
tmp-=mt_len;
|
|
|
|
ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type);
|
|
if (ext_is_len == 0) /* did something go wrong ? */
|
|
goto trunctlv;
|
|
|
|
tmp-=ext_is_len;
|
|
tptr+=ext_is_len;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_IS_ALIAS_ID:
|
|
while (tmp >= NODE_ID_LEN+1) { /* is it worth attempting a decode ? */
|
|
ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type);
|
|
if (ext_is_len == 0) /* did something go wrong ? */
|
|
goto trunctlv;
|
|
tmp-=ext_is_len;
|
|
tptr+=ext_is_len;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_EXT_IS_REACH:
|
|
while (tmp >= NODE_ID_LEN+3+1) { /* is it worth attempting a decode ? */
|
|
ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type);
|
|
if (ext_is_len == 0) /* did something go wrong ? */
|
|
goto trunctlv;
|
|
tmp-=ext_is_len;
|
|
tptr+=ext_is_len;
|
|
}
|
|
break;
|
|
case ISIS_TLV_IS_REACH:
|
|
if (!TTEST2(*tptr,1)) /* check if there is one byte left to read out the virtual flag */
|
|
goto trunctlv;
|
|
printf("\n\t %s",
|
|
tok2str(isis_is_reach_virtual_values,
|
|
"bogus virtual flag 0x%02x",
|
|
*tptr++));
|
|
tlv_is_reach = (const struct isis_tlv_is_reach *)tptr;
|
|
while (tmp >= sizeof(struct isis_tlv_is_reach)) {
|
|
if (!TTEST(*tlv_is_reach))
|
|
goto trunctlv;
|
|
printf("\n\t IS Neighbor: %s",
|
|
isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN));
|
|
isis_print_metric_block(&tlv_is_reach->isis_metric_block);
|
|
tmp -= sizeof(struct isis_tlv_is_reach);
|
|
tlv_is_reach++;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_ESNEIGH:
|
|
tlv_es_reach = (const struct isis_tlv_es_reach *)tptr;
|
|
while (tmp >= sizeof(struct isis_tlv_es_reach)) {
|
|
if (!TTEST(*tlv_es_reach))
|
|
goto trunctlv;
|
|
printf("\n\t ES Neighbor: %s",
|
|
isis_print_id(tlv_es_reach->neighbor_sysid,SYSTEM_ID_LEN));
|
|
isis_print_metric_block(&tlv_es_reach->isis_metric_block);
|
|
tmp -= sizeof(struct isis_tlv_es_reach);
|
|
tlv_es_reach++;
|
|
}
|
|
break;
|
|
|
|
/* those two TLVs share the same format */
|
|
case ISIS_TLV_INT_IP_REACH:
|
|
case ISIS_TLV_EXT_IP_REACH:
|
|
if (!isis_print_tlv_ip_reach(pptr, "\n\t ", tlv_len))
|
|
return (1);
|
|
break;
|
|
|
|
case ISIS_TLV_EXTD_IP_REACH:
|
|
while (tmp>0) {
|
|
ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", IPV4);
|
|
if (ext_ip_len == 0) /* did something go wrong ? */
|
|
goto trunctlv;
|
|
tptr+=ext_ip_len;
|
|
tmp-=ext_ip_len;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_MT_IP_REACH:
|
|
while (tmp>0) {
|
|
mt_len = isis_print_mtid(tptr, "\n\t ");
|
|
if (mt_len == 0) /* did something go wrong ? */
|
|
goto trunctlv;
|
|
tptr+=mt_len;
|
|
tmp-=mt_len;
|
|
|
|
ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", IPV4);
|
|
if (ext_ip_len == 0) /* did something go wrong ? */
|
|
goto trunctlv;
|
|
tptr+=ext_ip_len;
|
|
tmp-=ext_ip_len;
|
|
}
|
|
break;
|
|
|
|
#ifdef INET6
|
|
case ISIS_TLV_IP6_REACH:
|
|
while (tmp>0) {
|
|
ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", IPV6);
|
|
if (ext_ip_len == 0) /* did something go wrong ? */
|
|
goto trunctlv;
|
|
tptr+=ext_ip_len;
|
|
tmp-=ext_ip_len;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_MT_IP6_REACH:
|
|
while (tmp>0) {
|
|
mt_len = isis_print_mtid(tptr, "\n\t ");
|
|
if (mt_len == 0) /* did something go wrong ? */
|
|
goto trunctlv;
|
|
tptr+=mt_len;
|
|
tmp-=mt_len;
|
|
|
|
ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", IPV6);
|
|
if (ext_ip_len == 0) /* did something go wrong ? */
|
|
goto trunctlv;
|
|
tptr+=ext_ip_len;
|
|
tmp-=ext_ip_len;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_IP6ADDR:
|
|
while (tmp>=16) {
|
|
if (!TTEST2(*tptr, 16))
|
|
goto trunctlv;
|
|
|
|
printf("\n\t IPv6 interface address: %s",
|
|
ip6addr_string(tptr));
|
|
|
|
tptr += 16;
|
|
tmp -= 16;
|
|
}
|
|
break;
|
|
#endif
|
|
case ISIS_TLV_AUTH:
|
|
if (!TTEST2(*tptr, 1))
|
|
goto trunctlv;
|
|
|
|
printf("\n\t %s: ",
|
|
tok2str(isis_subtlv_auth_values,
|
|
"unknown Authentication type 0x%02x",
|
|
*tptr));
|
|
|
|
switch (*tptr) {
|
|
case ISIS_SUBTLV_AUTH_SIMPLE:
|
|
for(i=1;i<tlv_len;i++) {
|
|
if (!TTEST2(*(tptr+i), 1))
|
|
goto trunctlv;
|
|
printf("%c",*(tptr+i));
|
|
}
|
|
break;
|
|
case ISIS_SUBTLV_AUTH_MD5:
|
|
for(i=1;i<tlv_len;i++) {
|
|
if (!TTEST2(*(tptr+i), 1))
|
|
goto trunctlv;
|
|
printf("%02x",*(tptr+i));
|
|
}
|
|
if (tlv_len != ISIS_SUBTLV_AUTH_MD5_LEN+1)
|
|
printf(", (malformed subTLV) ");
|
|
break;
|
|
case ISIS_SUBTLV_AUTH_PRIVATE:
|
|
default:
|
|
if(!print_unknown_data(tptr+1,"\n\t\t ",tlv_len-1))
|
|
return(0);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_PTP_ADJ:
|
|
tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr;
|
|
if(tmp>=1) {
|
|
if (!TTEST2(*tptr, 1))
|
|
goto trunctlv;
|
|
printf("\n\t Adjacency State: %s (%u)",
|
|
tok2str(isis_ptp_adjancey_values, "unknown", *tptr),
|
|
*tptr);
|
|
tmp--;
|
|
}
|
|
if(tmp>sizeof(tlv_ptp_adj->extd_local_circuit_id)) {
|
|
if (!TTEST2(tlv_ptp_adj->extd_local_circuit_id,
|
|
sizeof(tlv_ptp_adj->extd_local_circuit_id)))
|
|
goto trunctlv;
|
|
printf("\n\t Extended Local circuit-ID: 0x%08x",
|
|
EXTRACT_32BITS(tlv_ptp_adj->extd_local_circuit_id));
|
|
tmp-=sizeof(tlv_ptp_adj->extd_local_circuit_id);
|
|
}
|
|
if(tmp>=SYSTEM_ID_LEN) {
|
|
if (!TTEST2(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN))
|
|
goto trunctlv;
|
|
printf("\n\t Neighbor System-ID: %s",
|
|
isis_print_id(tlv_ptp_adj->neighbor_sysid,SYSTEM_ID_LEN));
|
|
tmp-=SYSTEM_ID_LEN;
|
|
}
|
|
if(tmp>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) {
|
|
if (!TTEST2(tlv_ptp_adj->neighbor_extd_local_circuit_id,
|
|
sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)))
|
|
goto trunctlv;
|
|
printf("\n\t Neighbor Extended Local circuit-ID: 0x%08x",
|
|
EXTRACT_32BITS(tlv_ptp_adj->neighbor_extd_local_circuit_id));
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_PROTOCOLS:
|
|
printf("\n\t NLPID(s): ");
|
|
while (tmp>0) {
|
|
if (!TTEST2(*(tptr), 1))
|
|
goto trunctlv;
|
|
printf("%s (0x%02x)",
|
|
tok2str(nlpid_values,
|
|
"unknown",
|
|
*tptr),
|
|
*tptr);
|
|
if (tmp>1) /* further NPLIDs ? - put comma */
|
|
printf(", ");
|
|
tptr++;
|
|
tmp--;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_TE_ROUTER_ID:
|
|
if (!TTEST2(*pptr, 4))
|
|
goto trunctlv;
|
|
printf("\n\t Traffic Engineering Router ID: %s", ipaddr_string(pptr));
|
|
break;
|
|
|
|
case ISIS_TLV_IPADDR:
|
|
while (tmp>=4) {
|
|
if (!TTEST2(*tptr, 4))
|
|
goto trunctlv;
|
|
printf("\n\t IPv4 interface address: %s", ipaddr_string(tptr));
|
|
tptr += 4;
|
|
tmp -= 4;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_HOSTNAME:
|
|
printf("\n\t Hostname: ");
|
|
while (tmp>0) {
|
|
if (!TTEST2(*tptr, 1))
|
|
goto trunctlv;
|
|
printf("%c",*tptr++);
|
|
tmp--;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_SHARED_RISK_GROUP:
|
|
if (tmp < NODE_ID_LEN)
|
|
break;
|
|
if (!TTEST2(*tptr, NODE_ID_LEN))
|
|
goto trunctlv;
|
|
printf("\n\t IS Neighbor: %s", isis_print_id(tptr, NODE_ID_LEN));
|
|
tptr+=(NODE_ID_LEN);
|
|
tmp-=(NODE_ID_LEN);
|
|
|
|
if (tmp < 1)
|
|
break;
|
|
if (!TTEST2(*tptr, 1))
|
|
goto trunctlv;
|
|
printf(", Flags: [%s]", ISIS_MASK_TLV_SHARED_RISK_GROUP(*tptr++) ? "numbered" : "unnumbered");
|
|
tmp--;
|
|
|
|
if (tmp < 4)
|
|
break;
|
|
if (!TTEST2(*tptr,4))
|
|
goto trunctlv;
|
|
printf("\n\t IPv4 interface address: %s", ipaddr_string(tptr));
|
|
tptr+=4;
|
|
tmp-=4;
|
|
|
|
if (tmp < 4)
|
|
break;
|
|
if (!TTEST2(*tptr,4))
|
|
goto trunctlv;
|
|
printf("\n\t IPv4 neighbor address: %s", ipaddr_string(tptr));
|
|
tptr+=4;
|
|
tmp-=4;
|
|
|
|
while (tmp>=4) {
|
|
if (!TTEST2(*tptr, 4))
|
|
goto trunctlv;
|
|
printf("\n\t Link-ID: 0x%08x", EXTRACT_32BITS(tptr));
|
|
tptr+=4;
|
|
tmp-=4;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_LSP:
|
|
tlv_lsp = (const struct isis_tlv_lsp *)tptr;
|
|
while(tmp>=sizeof(struct isis_tlv_lsp)) {
|
|
if (!TTEST((tlv_lsp->lsp_id)[LSP_ID_LEN-1]))
|
|
goto trunctlv;
|
|
printf("\n\t lsp-id: %s",
|
|
isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN));
|
|
if (!TTEST2(tlv_lsp->sequence_number, 4))
|
|
goto trunctlv;
|
|
printf(", seq: 0x%08x",EXTRACT_32BITS(tlv_lsp->sequence_number));
|
|
if (!TTEST2(tlv_lsp->remaining_lifetime, 2))
|
|
goto trunctlv;
|
|
printf(", lifetime: %5ds",EXTRACT_16BITS(tlv_lsp->remaining_lifetime));
|
|
if (!TTEST2(tlv_lsp->checksum, 2))
|
|
goto trunctlv;
|
|
printf(", chksum: 0x%04x",EXTRACT_16BITS(tlv_lsp->checksum));
|
|
tmp-=sizeof(struct isis_tlv_lsp);
|
|
tlv_lsp++;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_CHECKSUM:
|
|
if (tmp < 2)
|
|
break;
|
|
if (!TTEST2(*tptr, 2))
|
|
goto trunctlv;
|
|
printf("\n\t checksum: 0x%04x ", EXTRACT_16BITS(tptr));
|
|
/* do not attempt to verify the checksum if it is zero
|
|
* most likely a HMAC-MD5 TLV is also present and
|
|
* to avoid conflicts the checksum TLV is zeroed.
|
|
* see rfc3358 for details
|
|
*/
|
|
if (EXTRACT_16BITS(tptr) == 0)
|
|
printf("(unverified)");
|
|
else printf("(%s)", osi_cksum(optr, length) ? "incorrect" : "correct");
|
|
break;
|
|
|
|
case ISIS_TLV_MT_SUPPORTED:
|
|
while (tmp>1) {
|
|
/* length can only be a multiple of 2, otherwise there is
|
|
something broken -> so decode down until length is 1 */
|
|
if (tmp!=1) {
|
|
mt_len = isis_print_mtid(tptr, "\n\t ");
|
|
if (mt_len == 0) /* did something go wrong ? */
|
|
goto trunctlv;
|
|
tptr+=mt_len;
|
|
tmp-=mt_len;
|
|
} else {
|
|
printf("\n\t malformed MT-ID");
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_RESTART_SIGNALING:
|
|
if (tmp < 3)
|
|
break;
|
|
if (!TTEST2(*tptr, 3))
|
|
goto trunctlv;
|
|
printf("\n\t Flags [%s], Remaining holding time %us",
|
|
bittok2str(isis_restart_flag_values, "none", *tptr),
|
|
EXTRACT_16BITS(tptr+1));
|
|
tptr+=3;
|
|
tmp-=3;
|
|
if (tmp == SYSTEM_ID_LEN) {
|
|
if (!TTEST2(*tptr, SYSTEM_ID_LEN))
|
|
goto trunctlv;
|
|
printf(", for %s",isis_print_id(tptr,SYSTEM_ID_LEN));
|
|
} else if (tmp == NODE_ID_LEN) {
|
|
if (!TTEST2(*tptr, NODE_ID_LEN))
|
|
goto trunctlv;
|
|
printf(", for %s",isis_print_id(tptr,NODE_ID_LEN));
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_IDRP_INFO:
|
|
if (tmp < 1)
|
|
break;
|
|
if (!TTEST2(*tptr, 1))
|
|
goto trunctlv;
|
|
printf("\n\t Inter-Domain Information Type: %s",
|
|
tok2str(isis_subtlv_idrp_values,
|
|
"Unknown (0x%02x)",
|
|
*tptr));
|
|
switch (*tptr++) {
|
|
case ISIS_SUBTLV_IDRP_ASN:
|
|
if (!TTEST2(*tptr, 2)) /* fetch AS number */
|
|
goto trunctlv;
|
|
printf("AS Number: %u",EXTRACT_16BITS(tptr));
|
|
break;
|
|
case ISIS_SUBTLV_IDRP_LOCAL:
|
|
case ISIS_SUBTLV_IDRP_RES:
|
|
default:
|
|
if(!print_unknown_data(tptr,"\n\t ",tlv_len-1))
|
|
return(0);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_LSP_BUFFERSIZE:
|
|
if (tmp < 2)
|
|
break;
|
|
if (!TTEST2(*tptr, 2))
|
|
goto trunctlv;
|
|
printf("\n\t LSP Buffersize: %u",EXTRACT_16BITS(tptr));
|
|
break;
|
|
|
|
case ISIS_TLV_PART_DIS:
|
|
while (tmp >= SYSTEM_ID_LEN) {
|
|
if (!TTEST2(*tptr, SYSTEM_ID_LEN))
|
|
goto trunctlv;
|
|
printf("\n\t %s",isis_print_id(tptr,SYSTEM_ID_LEN));
|
|
tptr+=SYSTEM_ID_LEN;
|
|
tmp-=SYSTEM_ID_LEN;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_PREFIX_NEIGH:
|
|
if (tmp < sizeof(struct isis_metric_block))
|
|
break;
|
|
if (!TTEST2(*tptr, sizeof(struct isis_metric_block)))
|
|
goto trunctlv;
|
|
printf("\n\t Metric Block");
|
|
isis_print_metric_block((const struct isis_metric_block *)tptr);
|
|
tptr+=sizeof(struct isis_metric_block);
|
|
tmp-=sizeof(struct isis_metric_block);
|
|
|
|
while(tmp>0) {
|
|
if (!TTEST2(*tptr, 1))
|
|
goto trunctlv;
|
|
prefix_len=*tptr++; /* read out prefix length in semioctets*/
|
|
if (prefix_len < 2) {
|
|
printf("\n\t\tAddress: prefix length %u < 2", prefix_len);
|
|
break;
|
|
}
|
|
tmp--;
|
|
if (tmp < prefix_len/2)
|
|
break;
|
|
if (!TTEST2(*tptr, prefix_len/2))
|
|
goto trunctlv;
|
|
printf("\n\t\tAddress: %s/%u",
|
|
isonsap_string(tptr,prefix_len/2),
|
|
prefix_len*4);
|
|
tptr+=prefix_len/2;
|
|
tmp-=prefix_len/2;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_IIH_SEQNR:
|
|
if (tmp < 4)
|
|
break;
|
|
if (!TTEST2(*tptr, 4)) /* check if four bytes are on the wire */
|
|
goto trunctlv;
|
|
printf("\n\t Sequence number: %u", EXTRACT_32BITS(tptr) );
|
|
break;
|
|
|
|
case ISIS_TLV_VENDOR_PRIVATE:
|
|
if (tmp < 3)
|
|
break;
|
|
if (!TTEST2(*tptr, 3)) /* check if enough byte for a full oui */
|
|
goto trunctlv;
|
|
vendor_id = EXTRACT_24BITS(tptr);
|
|
printf("\n\t Vendor: %s (%u)",
|
|
tok2str(oui_values,"Unknown",vendor_id),
|
|
vendor_id);
|
|
tptr+=3;
|
|
tmp-=3;
|
|
if (tmp > 0) /* hexdump the rest */
|
|
if(!print_unknown_data(tptr,"\n\t\t",tmp))
|
|
return(0);
|
|
break;
|
|
/*
|
|
* FIXME those are the defined TLVs that lack a decoder
|
|
* you are welcome to contribute code ;-)
|
|
*/
|
|
|
|
case ISIS_TLV_DECNET_PHASE4:
|
|
case ISIS_TLV_LUCENT_PRIVATE:
|
|
case ISIS_TLV_IPAUTH:
|
|
case ISIS_TLV_NORTEL_PRIVATE1:
|
|
case ISIS_TLV_NORTEL_PRIVATE2:
|
|
|
|
default:
|
|
if (vflag <= 1) {
|
|
if(!print_unknown_data(pptr,"\n\t\t",tlv_len))
|
|
return(0);
|
|
}
|
|
break;
|
|
}
|
|
/* do we want to see an additionally hexdump ? */
|
|
if (vflag> 1) {
|
|
if(!print_unknown_data(pptr,"\n\t ",tlv_len))
|
|
return(0);
|
|
}
|
|
|
|
pptr += tlv_len;
|
|
packet_len -= tlv_len;
|
|
}
|
|
|
|
if (packet_len != 0) {
|
|
printf("\n\t %u straggler bytes", packet_len);
|
|
}
|
|
return (1);
|
|
|
|
trunc:
|
|
fputs("[|isis]", stdout);
|
|
return (1);
|
|
|
|
trunctlv:
|
|
printf("\n\t\t packet exceeded snapshot");
|
|
return(1);
|
|
}
|
|
|
|
/*
|
|
* Verify the checksum. See 8473-1, Appendix C, section C.4.
|
|
*/
|
|
|
|
static int
|
|
osi_cksum(const u_int8_t *tptr, u_int len)
|
|
{
|
|
int32_t c0 = 0, c1 = 0;
|
|
|
|
while ((int)--len >= 0) {
|
|
c0 += *tptr++;
|
|
c0 %= 255;
|
|
c1 += c0;
|
|
c1 %= 255;
|
|
}
|
|
return (c0 | c1);
|
|
}
|
|
|
|
|
|
/*
|
|
* Local Variables:
|
|
* c-style: whitesmith
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|