mirror of
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8bdc5a6251
Also, the changes made in r272451 and r272653 that were lost in the merge of 4.6.2 (r276788) have been restored. PR: 199568 Differential Revision: https://reviews.freebsd.org/D3007 Reviewed by: brooks, hiren Approved by: jmallett (mentor) MFC after: 1 month
3121 lines
103 KiB
C
3121 lines
103 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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#define NETDISSECT_REWORKED
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#include <string.h>
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#include "interface.h"
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#include "addrtoname.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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#include "signature.h"
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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 const 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_CHECKSUM_MINLEN 2
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#define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */
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#define ISIS_TLV_LSP_BUFFERSIZE_MINLEN 2
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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_IDRP_INFO_MINLEN 1
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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_MT_PORT_CAP 143 /* rfc6165 */
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#define ISIS_TLV_MT_CAPABILITY 144 /* rfc6329 */
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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_RESTART_SIGNALING_FLAGLEN 1
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#define ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN 2
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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_MT_SUPPORTED_MINLEN 2
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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_IIH_SEQNR_MINLEN 4
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#define ISIS_TLV_VENDOR_PRIVATE 250 /* draft-ietf-isis-experimental-tlv-01 */
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#define ISIS_TLV_VENDOR_PRIVATE_MINLEN 3
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static const 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_MT_PORT_CAP, "Multi-Topology-Aware Port Capability"},
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{ ISIS_TLV_MT_CAPABILITY, "Multi-Topology Capability"},
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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 const 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 const 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 const 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 const 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 const 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 const 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 const 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 const 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 const 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 const 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 const 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 const 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 const 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 const 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 /* rfc4205 */
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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 /* rfc4124 */
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#define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD 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_ATTRIBUTE 19 /* draft-ietf-isis-link-attr-01 */
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#define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* rfc4205 */
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#define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* rfc4205 */
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#define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS 22 /* rfc4124 */
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#define ISIS_SUBTLV_SPB_METRIC 29 /* rfc6329 */
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static const 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_TE_METRIC, "Traffic Engineering Metric" },
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{ ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE, "Link Attribute" },
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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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{ ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD, "Bandwidth Constraints (old)" },
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{ ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS, "Bandwidth Constraints" },
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{ ISIS_SUBTLV_SPB_METRIC, "SPB Metric" },
|
|
{ 250, "Reserved for cisco specific extensions" },
|
|
{ 251, "Reserved for cisco specific extensions" },
|
|
{ 252, "Reserved for cisco specific extensions" },
|
|
{ 253, "Reserved for cisco specific extensions" },
|
|
{ 254, "Reserved for cisco specific extensions" },
|
|
{ 255, "Reserved for future expansion" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
#define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32 1 /* draft-ietf-isis-admin-tags-01 */
|
|
#define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64 2 /* draft-ietf-isis-admin-tags-01 */
|
|
#define ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR 117 /* draft-ietf-isis-wg-multi-topology-05 */
|
|
|
|
static const struct tok isis_ext_ip_reach_subtlv_values[] = {
|
|
{ ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32, "32-Bit Administrative tag" },
|
|
{ ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64, "64-Bit Administrative tag" },
|
|
{ ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR, "Management Prefix Color" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const struct tok isis_subtlv_link_attribute_values[] = {
|
|
{ 0x01, "Local Protection Available" },
|
|
{ 0x02, "Link excluded from local protection path" },
|
|
{ 0x04, "Local maintenance required"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
#define ISIS_SUBTLV_AUTH_SIMPLE 1
|
|
#define ISIS_SUBTLV_AUTH_GENERIC 3 /* rfc 5310 */
|
|
#define ISIS_SUBTLV_AUTH_MD5 54
|
|
#define ISIS_SUBTLV_AUTH_MD5_LEN 16
|
|
#define ISIS_SUBTLV_AUTH_PRIVATE 255
|
|
|
|
static const struct tok isis_subtlv_auth_values[] = {
|
|
{ ISIS_SUBTLV_AUTH_SIMPLE, "simple text password"},
|
|
{ ISIS_SUBTLV_AUTH_GENERIC, "Generic Crypto key-id"},
|
|
{ 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 const 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 ISIS_SUBTLV_SPB_MCID 4
|
|
#define ISIS_SUBTLV_SPB_DIGEST 5
|
|
#define ISIS_SUBTLV_SPB_BVID 6
|
|
|
|
#define ISIS_SUBTLV_SPB_INSTANCE 1
|
|
#define ISIS_SUBTLV_SPBM_SI 3
|
|
|
|
#define ISIS_SPB_MCID_LEN 51
|
|
#define ISIS_SUBTLV_SPB_MCID_MIN_LEN 102
|
|
#define ISIS_SUBTLV_SPB_DIGEST_MIN_LEN 33
|
|
#define ISIS_SUBTLV_SPB_BVID_MIN_LEN 6
|
|
#define ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN 19
|
|
#define ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN 8
|
|
|
|
static const struct tok isis_mt_port_cap_subtlv_values[] = {
|
|
{ ISIS_SUBTLV_SPB_MCID, "SPB MCID" },
|
|
{ ISIS_SUBTLV_SPB_DIGEST, "SPB Digest" },
|
|
{ ISIS_SUBTLV_SPB_BVID, "SPB BVID" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const struct tok isis_mt_capability_subtlv_values[] = {
|
|
{ ISIS_SUBTLV_SPB_INSTANCE, "SPB Instance" },
|
|
{ ISIS_SUBTLV_SPBM_SI, "SPBM Service Identifier and Unicast Address" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
struct isis_spb_mcid {
|
|
uint8_t format_id;
|
|
uint8_t name[32];
|
|
uint8_t revision_lvl[2];
|
|
uint8_t digest[16];
|
|
};
|
|
|
|
struct isis_subtlv_spb_mcid {
|
|
struct isis_spb_mcid mcid;
|
|
struct isis_spb_mcid aux_mcid;
|
|
};
|
|
|
|
struct isis_subtlv_spb_instance {
|
|
uint8_t cist_root_id[8];
|
|
uint8_t cist_external_root_path_cost[4];
|
|
uint8_t bridge_priority[2];
|
|
uint8_t spsourceid[4];
|
|
uint8_t no_of_trees;
|
|
};
|
|
|
|
#define CLNP_SEGMENT_PART 0x80
|
|
#define CLNP_MORE_SEGMENTS 0x40
|
|
#define CLNP_REQUEST_ER 0x20
|
|
|
|
static const 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 const struct tok isis_mt_flag_values[] = {
|
|
{ 0x4000, "ATT bit set"},
|
|
{ 0x8000, "Overload 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 const 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 const 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 const 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, "L2 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 const 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 {
|
|
uint8_t adjacency_state;
|
|
uint8_t extd_local_circuit_id[4];
|
|
uint8_t neighbor_sysid[SYSTEM_ID_LEN];
|
|
uint8_t neighbor_extd_local_circuit_id[4];
|
|
};
|
|
|
|
static void osi_print_cksum(netdissect_options *, const uint8_t *pptr, uint16_t checksum,
|
|
u_int checksum_offset, u_int length);
|
|
static int clnp_print(netdissect_options *, const uint8_t *, u_int);
|
|
static void esis_print(netdissect_options *, const uint8_t *, u_int);
|
|
static int isis_print(netdissect_options *, const uint8_t *, u_int);
|
|
|
|
struct isis_metric_block {
|
|
uint8_t metric_default;
|
|
uint8_t metric_delay;
|
|
uint8_t metric_expense;
|
|
uint8_t metric_error;
|
|
};
|
|
|
|
struct isis_tlv_is_reach {
|
|
struct isis_metric_block isis_metric_block;
|
|
uint8_t neighbor_nodeid[NODE_ID_LEN];
|
|
};
|
|
|
|
struct isis_tlv_es_reach {
|
|
struct isis_metric_block isis_metric_block;
|
|
uint8_t neighbor_sysid[SYSTEM_ID_LEN];
|
|
};
|
|
|
|
struct isis_tlv_ip_reach {
|
|
struct isis_metric_block isis_metric_block;
|
|
uint8_t prefix[4];
|
|
uint8_t mask[4];
|
|
};
|
|
|
|
static const struct tok isis_is_reach_virtual_values[] = {
|
|
{ 0, "IsNotVirtual"},
|
|
{ 1, "IsVirtual"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const struct tok isis_restart_flag_values[] = {
|
|
{ 0x1, "Restart Request"},
|
|
{ 0x2, "Restart Acknowledgement"},
|
|
{ 0x4, "Suppress adjacency advertisement"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
struct isis_common_header {
|
|
uint8_t nlpid;
|
|
uint8_t fixed_len;
|
|
uint8_t version; /* Protocol version */
|
|
uint8_t id_length;
|
|
uint8_t pdu_type; /* 3 MSbits are reserved */
|
|
uint8_t pdu_version; /* Packet format version */
|
|
uint8_t reserved;
|
|
uint8_t max_area;
|
|
};
|
|
|
|
struct isis_iih_lan_header {
|
|
uint8_t circuit_type;
|
|
uint8_t source_id[SYSTEM_ID_LEN];
|
|
uint8_t holding_time[2];
|
|
uint8_t pdu_len[2];
|
|
uint8_t priority;
|
|
uint8_t lan_id[NODE_ID_LEN];
|
|
};
|
|
|
|
struct isis_iih_ptp_header {
|
|
uint8_t circuit_type;
|
|
uint8_t source_id[SYSTEM_ID_LEN];
|
|
uint8_t holding_time[2];
|
|
uint8_t pdu_len[2];
|
|
uint8_t circuit_id;
|
|
};
|
|
|
|
struct isis_lsp_header {
|
|
uint8_t pdu_len[2];
|
|
uint8_t remaining_lifetime[2];
|
|
uint8_t lsp_id[LSP_ID_LEN];
|
|
uint8_t sequence_number[4];
|
|
uint8_t checksum[2];
|
|
uint8_t typeblock;
|
|
};
|
|
|
|
struct isis_csnp_header {
|
|
uint8_t pdu_len[2];
|
|
uint8_t source_id[NODE_ID_LEN];
|
|
uint8_t start_lsp_id[LSP_ID_LEN];
|
|
uint8_t end_lsp_id[LSP_ID_LEN];
|
|
};
|
|
|
|
struct isis_psnp_header {
|
|
uint8_t pdu_len[2];
|
|
uint8_t source_id[NODE_ID_LEN];
|
|
};
|
|
|
|
struct isis_tlv_lsp {
|
|
uint8_t remaining_lifetime[2];
|
|
uint8_t lsp_id[LSP_ID_LEN];
|
|
uint8_t sequence_number[4];
|
|
uint8_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(netdissect_options *ndo,
|
|
const uint8_t *p, u_int length, u_int caplen)
|
|
{
|
|
if (caplen <= 1) { /* enough bytes on the wire ? */
|
|
ND_PRINT((ndo, "|OSI"));
|
|
return;
|
|
}
|
|
|
|
if (ndo->ndo_eflag)
|
|
ND_PRINT((ndo, "OSI NLPID %s (0x%02x): ", tok2str(nlpid_values, "Unknown", *p), *p));
|
|
|
|
switch (*p) {
|
|
|
|
case NLPID_CLNP:
|
|
if (!clnp_print(ndo, p, length))
|
|
print_unknown_data(ndo, p, "\n\t", caplen);
|
|
break;
|
|
|
|
case NLPID_ESIS:
|
|
esis_print(ndo, p, length);
|
|
return;
|
|
|
|
case NLPID_ISIS:
|
|
if (!isis_print(ndo, p, length))
|
|
print_unknown_data(ndo, p, "\n\t", caplen);
|
|
break;
|
|
|
|
case NLPID_NULLNS:
|
|
ND_PRINT((ndo, "%slength: %u", ndo->ndo_eflag ? "" : ", ", length));
|
|
break;
|
|
|
|
case NLPID_Q933:
|
|
q933_print(ndo, p + 1, length - 1);
|
|
break;
|
|
|
|
case NLPID_IP:
|
|
ip_print(ndo, p + 1, length - 1);
|
|
break;
|
|
|
|
case NLPID_IP6:
|
|
ip6_print(ndo, p + 1, length - 1);
|
|
break;
|
|
|
|
case NLPID_PPP:
|
|
ppp_print(ndo, p + 1, length - 1);
|
|
break;
|
|
|
|
default:
|
|
if (!ndo->ndo_eflag)
|
|
ND_PRINT((ndo, "OSI NLPID 0x%02x unknown", *p));
|
|
ND_PRINT((ndo, "%slength: %u", ndo->ndo_eflag ? "" : ", ", length));
|
|
if (caplen > 1)
|
|
print_unknown_data(ndo, 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 const 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 {
|
|
uint8_t nlpid;
|
|
uint8_t length_indicator;
|
|
uint8_t version;
|
|
uint8_t lifetime; /* units of 500ms */
|
|
uint8_t type;
|
|
uint8_t segment_length[2];
|
|
uint8_t cksum[2];
|
|
};
|
|
|
|
struct clnp_segment_header_t {
|
|
uint8_t data_unit_id[2];
|
|
uint8_t segment_offset[2];
|
|
uint8_t total_length[2];
|
|
};
|
|
|
|
/*
|
|
* clnp_print
|
|
* Decode CLNP packets. Return 0 on error.
|
|
*/
|
|
|
|
static int
|
|
clnp_print(netdissect_options *ndo,
|
|
const uint8_t *pptr, u_int length)
|
|
{
|
|
const uint8_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;
|
|
uint8_t rfd_error_major,rfd_error_minor;
|
|
|
|
clnp_header = (const struct clnp_header_t *) pptr;
|
|
ND_TCHECK(*clnp_header);
|
|
|
|
li = clnp_header->length_indicator;
|
|
optr = pptr;
|
|
|
|
if (!ndo->ndo_eflag)
|
|
ND_PRINT((ndo, "CLNP"));
|
|
|
|
/*
|
|
* Sanity checking of the header.
|
|
*/
|
|
|
|
if (clnp_header->version != CLNP_VERSION) {
|
|
ND_PRINT((ndo, "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 (ndo->ndo_vflag < 1) {
|
|
ND_PRINT((ndo, "%s%s > %s, %s, length %u",
|
|
ndo->ndo_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);
|
|
}
|
|
ND_PRINT((ndo, "%slength %u", ndo->ndo_eflag ? "" : ", ", length));
|
|
|
|
ND_PRINT((ndo, "\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)));
|
|
|
|
osi_print_cksum(ndo, optr, EXTRACT_16BITS(clnp_header->cksum), 7,
|
|
clnp_header->length_indicator);
|
|
|
|
ND_PRINT((ndo, "\n\tFlags [%s]",
|
|
bittok2str(clnp_flag_values, "none", clnp_flags)));
|
|
|
|
ND_PRINT((ndo, "\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;
|
|
ND_TCHECK(*clnp_segment_header);
|
|
ND_PRINT((ndo, "\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 uint8_t *tptr;
|
|
|
|
ND_TCHECK2(*pptr, 2);
|
|
if (li < 2) {
|
|
ND_PRINT((ndo, ", bad opts/li"));
|
|
return (0);
|
|
}
|
|
op = *pptr++;
|
|
opli = *pptr++;
|
|
li -= 2;
|
|
ND_TCHECK2(*pptr, opli);
|
|
if (opli > li) {
|
|
ND_PRINT((ndo, ", opt (%d) too long", op));
|
|
return (0);
|
|
}
|
|
li -= opli;
|
|
tptr = pptr;
|
|
tlen = opli;
|
|
|
|
ND_PRINT((ndo, "\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:
|
|
ND_PRINT((ndo, "%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) {
|
|
ND_PRINT((ndo, " Bad NSAP offset (0)"));
|
|
break;
|
|
}
|
|
nsap_offset-=1; /* offset to nsap list */
|
|
if (nsap_offset > tlen) {
|
|
ND_PRINT((ndo, " 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) {
|
|
ND_PRINT((ndo, "\n\t NSAP address goes past end of option"));
|
|
break;
|
|
}
|
|
if (source_address_length > 0) {
|
|
source_address=(tptr+1);
|
|
ND_TCHECK2(*source_address, source_address_length);
|
|
ND_PRINT((ndo, "\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:
|
|
ND_PRINT((ndo, "0x%1x", *tptr&0x0f));
|
|
break;
|
|
|
|
case CLNP_OPTION_QOS_MAINTENANCE:
|
|
ND_PRINT((ndo, "\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)
|
|
ND_PRINT((ndo, "\n\t QoS Flags [%s]",
|
|
bittok2str(clnp_option_qos_global_values,
|
|
"none",
|
|
*tptr&CLNP_OPTION_OPTION_QOS_MASK)));
|
|
break;
|
|
|
|
case CLNP_OPTION_SECURITY:
|
|
ND_PRINT((ndo, "\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;
|
|
ND_PRINT((ndo, "\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:
|
|
ND_PRINT((ndo, "padding data"));
|
|
break;
|
|
|
|
/*
|
|
* FIXME those are the defined Options that lack a decoder
|
|
* you are welcome to contribute code ;-)
|
|
*/
|
|
|
|
default:
|
|
print_unknown_data(ndo, tptr, "\n\t ", opli);
|
|
break;
|
|
}
|
|
if (ndo->ndo_vflag > 1)
|
|
print_unknown_data(ndo, pptr, "\n\t ", opli);
|
|
pptr += opli;
|
|
}
|
|
|
|
switch (clnp_pdu_type) {
|
|
|
|
case CLNP_PDU_ER: /* fall through */
|
|
case CLNP_PDU_ERP:
|
|
ND_TCHECK(*pptr);
|
|
if (*(pptr) == NLPID_CLNP) {
|
|
ND_PRINT((ndo, "\n\t-----original packet-----\n\t"));
|
|
/* FIXME recursion protection */
|
|
clnp_print(ndo, 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) {
|
|
ND_PRINT((ndo, "\n\t undecoded non-header data, length %u", length-clnp_header->length_indicator));
|
|
print_unknown_data(ndo, pptr, "\n\t ", length - (pptr - optr));
|
|
}
|
|
}
|
|
|
|
return (1);
|
|
|
|
trunc:
|
|
ND_PRINT((ndo, "[|clnp]"));
|
|
return (1);
|
|
|
|
}
|
|
|
|
|
|
#define ESIS_PDU_REDIRECT 6
|
|
#define ESIS_PDU_ESH 2
|
|
#define ESIS_PDU_ISH 4
|
|
|
|
static const struct tok esis_pdu_values[] = {
|
|
{ ESIS_PDU_REDIRECT, "redirect"},
|
|
{ ESIS_PDU_ESH, "ESH"},
|
|
{ ESIS_PDU_ISH, "ISH"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
struct esis_header_t {
|
|
uint8_t nlpid;
|
|
uint8_t length_indicator;
|
|
uint8_t version;
|
|
uint8_t reserved;
|
|
uint8_t type;
|
|
uint8_t holdtime[2];
|
|
uint8_t cksum[2];
|
|
};
|
|
|
|
static void
|
|
esis_print(netdissect_options *ndo,
|
|
const uint8_t *pptr, u_int length)
|
|
{
|
|
const uint8_t *optr;
|
|
u_int li,esis_pdu_type,source_address_length, source_address_number;
|
|
const struct esis_header_t *esis_header;
|
|
|
|
if (!ndo->ndo_eflag)
|
|
ND_PRINT((ndo, "ES-IS"));
|
|
|
|
if (length <= 2) {
|
|
ND_PRINT((ndo, ndo->ndo_qflag ? "bad pkt!" : "no header at all!"));
|
|
return;
|
|
}
|
|
|
|
esis_header = (const struct esis_header_t *) pptr;
|
|
ND_TCHECK(*esis_header);
|
|
li = esis_header->length_indicator;
|
|
optr = pptr;
|
|
|
|
/*
|
|
* Sanity checking of the header.
|
|
*/
|
|
|
|
if (esis_header->nlpid != NLPID_ESIS) {
|
|
ND_PRINT((ndo, " nlpid 0x%02x packet not supported", esis_header->nlpid));
|
|
return;
|
|
}
|
|
|
|
if (esis_header->version != ESIS_VERSION) {
|
|
ND_PRINT((ndo, " version %d packet not supported", esis_header->version));
|
|
return;
|
|
}
|
|
|
|
if (li > length) {
|
|
ND_PRINT((ndo, " length indicator(%d) > PDU size (%d)!", li, length));
|
|
return;
|
|
}
|
|
|
|
if (li < sizeof(struct esis_header_t) + 2) {
|
|
ND_PRINT((ndo, " length indicator < min PDU size %d:", li));
|
|
while (pptr < ndo->ndo_snapend)
|
|
ND_PRINT((ndo, "%02X", *pptr++));
|
|
return;
|
|
}
|
|
|
|
esis_pdu_type = esis_header->type & ESIS_PDU_TYPE_MASK;
|
|
|
|
if (ndo->ndo_vflag < 1) {
|
|
ND_PRINT((ndo, "%s%s, length %u",
|
|
ndo->ndo_eflag ? "" : ", ",
|
|
tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type),
|
|
length));
|
|
return;
|
|
} else
|
|
ND_PRINT((ndo, "%slength %u\n\t%s (%u)",
|
|
ndo->ndo_eflag ? "" : ", ",
|
|
length,
|
|
tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type),
|
|
esis_pdu_type));
|
|
|
|
ND_PRINT((ndo, ", v: %u%s", esis_header->version, esis_header->version == ESIS_VERSION ? "" : "unsupported" ));
|
|
ND_PRINT((ndo, ", checksum: 0x%04x", EXTRACT_16BITS(esis_header->cksum)));
|
|
|
|
osi_print_cksum(ndo, pptr, EXTRACT_16BITS(esis_header->cksum), 7, li);
|
|
|
|
ND_PRINT((ndo, ", holding time: %us, length indicator: %u",
|
|
EXTRACT_16BITS(esis_header->holdtime), li));
|
|
|
|
if (ndo->ndo_vflag > 1)
|
|
print_unknown_data(ndo, 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 uint8_t *dst, *snpa, *neta;
|
|
u_int dstl, snpal, netal;
|
|
|
|
ND_TCHECK(*pptr);
|
|
if (li < 1) {
|
|
ND_PRINT((ndo, ", bad redirect/li"));
|
|
return;
|
|
}
|
|
dstl = *pptr;
|
|
pptr++;
|
|
li--;
|
|
ND_TCHECK2(*pptr, dstl);
|
|
if (li < dstl) {
|
|
ND_PRINT((ndo, ", bad redirect/li"));
|
|
return;
|
|
}
|
|
dst = pptr;
|
|
pptr += dstl;
|
|
li -= dstl;
|
|
ND_PRINT((ndo, "\n\t %s", isonsap_string(dst, dstl)));
|
|
|
|
ND_TCHECK(*pptr);
|
|
if (li < 1) {
|
|
ND_PRINT((ndo, ", bad redirect/li"));
|
|
return;
|
|
}
|
|
snpal = *pptr;
|
|
pptr++;
|
|
li--;
|
|
ND_TCHECK2(*pptr, snpal);
|
|
if (li < snpal) {
|
|
ND_PRINT((ndo, ", bad redirect/li"));
|
|
return;
|
|
}
|
|
snpa = pptr;
|
|
pptr += snpal;
|
|
li -= snpal;
|
|
ND_TCHECK(*pptr);
|
|
if (li < 1) {
|
|
ND_PRINT((ndo, ", bad redirect/li"));
|
|
return;
|
|
}
|
|
netal = *pptr;
|
|
pptr++;
|
|
ND_TCHECK2(*pptr, netal);
|
|
if (li < netal) {
|
|
ND_PRINT((ndo, ", bad redirect/li"));
|
|
return;
|
|
}
|
|
neta = pptr;
|
|
pptr += netal;
|
|
li -= netal;
|
|
|
|
if (netal == 0)
|
|
ND_PRINT((ndo, "\n\t %s", etheraddr_string(ndo, snpa)));
|
|
else
|
|
ND_PRINT((ndo, "\n\t %s", isonsap_string(neta, netal)));
|
|
break;
|
|
}
|
|
|
|
case ESIS_PDU_ESH:
|
|
ND_TCHECK(*pptr);
|
|
if (li < 1) {
|
|
ND_PRINT((ndo, ", bad esh/li"));
|
|
return;
|
|
}
|
|
source_address_number = *pptr;
|
|
pptr++;
|
|
li--;
|
|
|
|
ND_PRINT((ndo, "\n\t Number of Source Addresses: %u", source_address_number));
|
|
|
|
while (source_address_number > 0) {
|
|
ND_TCHECK(*pptr);
|
|
if (li < 1) {
|
|
ND_PRINT((ndo, ", bad esh/li"));
|
|
return;
|
|
}
|
|
source_address_length = *pptr;
|
|
pptr++;
|
|
li--;
|
|
|
|
ND_TCHECK2(*pptr, source_address_length);
|
|
if (li < source_address_length) {
|
|
ND_PRINT((ndo, ", bad esh/li"));
|
|
return;
|
|
}
|
|
ND_PRINT((ndo, "\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: {
|
|
ND_TCHECK(*pptr);
|
|
if (li < 1) {
|
|
ND_PRINT((ndo, ", bad ish/li"));
|
|
return;
|
|
}
|
|
source_address_length = *pptr;
|
|
pptr++;
|
|
li--;
|
|
ND_TCHECK2(*pptr, source_address_length);
|
|
if (li < source_address_length) {
|
|
ND_PRINT((ndo, ", bad ish/li"));
|
|
return;
|
|
}
|
|
ND_PRINT((ndo, "\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 (ndo->ndo_vflag <= 1) {
|
|
if (pptr < ndo->ndo_snapend)
|
|
print_unknown_data(ndo, pptr, "\n\t ", ndo->ndo_snapend - pptr);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* now walk the options */
|
|
while (li != 0) {
|
|
u_int op, opli;
|
|
const uint8_t *tptr;
|
|
|
|
if (li < 2) {
|
|
ND_PRINT((ndo, ", bad opts/li"));
|
|
return;
|
|
}
|
|
ND_TCHECK2(*pptr, 2);
|
|
op = *pptr++;
|
|
opli = *pptr++;
|
|
li -= 2;
|
|
if (opli > li) {
|
|
ND_PRINT((ndo, ", opt (%d) too long", op));
|
|
return;
|
|
}
|
|
li -= opli;
|
|
tptr = pptr;
|
|
|
|
ND_PRINT((ndo, "\n\t %s Option #%u, length %u, value: ",
|
|
tok2str(esis_option_values,"Unknown",op),
|
|
op,
|
|
opli));
|
|
|
|
switch (op) {
|
|
|
|
case ESIS_OPTION_ES_CONF_TIME:
|
|
if (opli == 2) {
|
|
ND_TCHECK2(*pptr, 2);
|
|
ND_PRINT((ndo, "%us", EXTRACT_16BITS(tptr)));
|
|
} else
|
|
ND_PRINT((ndo, "(bad length)"));
|
|
break;
|
|
|
|
case ESIS_OPTION_PROTOCOLS:
|
|
while (opli>0) {
|
|
ND_TCHECK(*pptr);
|
|
ND_PRINT((ndo, "%s (0x%02x)",
|
|
tok2str(nlpid_values,
|
|
"unknown",
|
|
*tptr),
|
|
*tptr));
|
|
if (opli>1) /* further NPLIDs ? - put comma */
|
|
ND_PRINT((ndo, ", "));
|
|
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(ndo, tptr, "\n\t ", opli);
|
|
break;
|
|
}
|
|
if (ndo->ndo_vflag > 1)
|
|
print_unknown_data(ndo, pptr, "\n\t ", opli);
|
|
pptr += opli;
|
|
}
|
|
trunc:
|
|
return;
|
|
}
|
|
|
|
static void
|
|
isis_print_mcid(netdissect_options *ndo,
|
|
const struct isis_spb_mcid *mcid)
|
|
{
|
|
int i;
|
|
|
|
ND_PRINT((ndo, "ID: %d, Name: ", mcid->format_id));
|
|
|
|
for(i=0; i<32; i++)
|
|
{
|
|
ND_PRINT((ndo, "%c", mcid->name[i]));
|
|
if(mcid->name[i] == '\0')
|
|
break;
|
|
}
|
|
|
|
ND_PRINT((ndo, "\n\t Lvl: %d", EXTRACT_16BITS(mcid->revision_lvl)));
|
|
|
|
ND_PRINT((ndo, ", Digest: "));
|
|
|
|
for(i=0;i<16;i++)
|
|
ND_PRINT((ndo, "%.2x ", mcid->digest[i]));
|
|
}
|
|
|
|
static int
|
|
isis_print_mt_port_cap_subtlv(netdissect_options *ndo,
|
|
const uint8_t *tptr, int len)
|
|
{
|
|
int stlv_type, stlv_len;
|
|
const struct isis_subtlv_spb_mcid *subtlv_spb_mcid;
|
|
int i;
|
|
|
|
while (len > 0)
|
|
{
|
|
stlv_type = *(tptr++);
|
|
stlv_len = *(tptr++);
|
|
|
|
/* first lets see if we know the subTLVs name*/
|
|
ND_PRINT((ndo, "\n\t %s subTLV #%u, length: %u",
|
|
tok2str(isis_mt_port_cap_subtlv_values, "unknown", stlv_type),
|
|
stlv_type,
|
|
stlv_len));
|
|
|
|
/*len -= TLV_TYPE_LEN_OFFSET;*/
|
|
len = len -2;
|
|
|
|
switch (stlv_type)
|
|
{
|
|
case ISIS_SUBTLV_SPB_MCID:
|
|
{
|
|
if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_MCID_MIN_LEN))
|
|
goto trunctlv;
|
|
|
|
subtlv_spb_mcid = (struct isis_subtlv_spb_mcid *)tptr;
|
|
|
|
ND_PRINT((ndo, "\n\t MCID: "));
|
|
isis_print_mcid(ndo, &(subtlv_spb_mcid->mcid));
|
|
|
|
/*tptr += SPB_MCID_MIN_LEN;
|
|
len -= SPB_MCID_MIN_LEN; */
|
|
|
|
ND_PRINT((ndo, "\n\t AUX-MCID: "));
|
|
isis_print_mcid(ndo, &(subtlv_spb_mcid->aux_mcid));
|
|
|
|
/*tptr += SPB_MCID_MIN_LEN;
|
|
len -= SPB_MCID_MIN_LEN; */
|
|
tptr = tptr + sizeof(struct isis_subtlv_spb_mcid);
|
|
len = len - sizeof(struct isis_subtlv_spb_mcid);
|
|
|
|
break;
|
|
}
|
|
|
|
case ISIS_SUBTLV_SPB_DIGEST:
|
|
{
|
|
if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_DIGEST_MIN_LEN))
|
|
goto trunctlv;
|
|
|
|
ND_PRINT((ndo, "\n\t RES: %d V: %d A: %d D: %d",
|
|
(*(tptr) >> 5), (((*tptr)>> 4) & 0x01),
|
|
((*(tptr) >> 2) & 0x03), ((*tptr) & 0x03)));
|
|
|
|
tptr++;
|
|
|
|
ND_PRINT((ndo, "\n\t Digest: "));
|
|
|
|
for(i=1;i<=8; i++)
|
|
{
|
|
ND_PRINT((ndo, "%08x ", EXTRACT_32BITS(tptr)));
|
|
if (i%4 == 0 && i != 8)
|
|
ND_PRINT((ndo, "\n\t "));
|
|
tptr = tptr + 4;
|
|
}
|
|
|
|
len = len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN;
|
|
|
|
break;
|
|
}
|
|
|
|
case ISIS_SUBTLV_SPB_BVID:
|
|
{
|
|
if (!ND_TTEST2(*(tptr), stlv_len))
|
|
goto trunctlv;
|
|
|
|
while (len)
|
|
{
|
|
if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_BVID_MIN_LEN))
|
|
goto trunctlv;
|
|
|
|
ND_PRINT((ndo, "\n\t ECT: %08x",
|
|
EXTRACT_32BITS(tptr)));
|
|
|
|
tptr = tptr+4;
|
|
|
|
ND_PRINT((ndo, " BVID: %d, U:%01x M:%01x ",
|
|
(EXTRACT_16BITS (tptr) >> 4) ,
|
|
(EXTRACT_16BITS (tptr) >> 3) & 0x01,
|
|
(EXTRACT_16BITS (tptr) >> 2) & 0x01));
|
|
|
|
tptr = tptr + 2;
|
|
len = len - ISIS_SUBTLV_SPB_BVID_MIN_LEN;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
trunctlv:
|
|
ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
|
|
return(1);
|
|
}
|
|
|
|
static int
|
|
isis_print_mt_capability_subtlv(netdissect_options *ndo,
|
|
const uint8_t *tptr, int len)
|
|
{
|
|
int stlv_type, stlv_len, tmp;
|
|
|
|
while (len > 0)
|
|
{
|
|
stlv_type = *(tptr++);
|
|
stlv_len = *(tptr++);
|
|
|
|
/* first lets see if we know the subTLVs name*/
|
|
ND_PRINT((ndo, "\n\t %s subTLV #%u, length: %u",
|
|
tok2str(isis_mt_capability_subtlv_values, "unknown", stlv_type),
|
|
stlv_type,
|
|
stlv_len));
|
|
|
|
len = len - 2;
|
|
|
|
switch (stlv_type)
|
|
{
|
|
case ISIS_SUBTLV_SPB_INSTANCE:
|
|
|
|
if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN))
|
|
goto trunctlv;
|
|
|
|
ND_PRINT((ndo, "\n\t CIST Root-ID: %08x", EXTRACT_32BITS(tptr)));
|
|
tptr = tptr+4;
|
|
ND_PRINT((ndo, " %08x", EXTRACT_32BITS(tptr)));
|
|
tptr = tptr+4;
|
|
ND_PRINT((ndo, ", Path Cost: %08x", EXTRACT_32BITS(tptr)));
|
|
tptr = tptr+4;
|
|
ND_PRINT((ndo, ", Prio: %d", EXTRACT_16BITS(tptr)));
|
|
tptr = tptr + 2;
|
|
ND_PRINT((ndo, "\n\t RES: %d",
|
|
EXTRACT_16BITS(tptr) >> 5));
|
|
ND_PRINT((ndo, ", V: %d",
|
|
(EXTRACT_16BITS(tptr) >> 4) & 0x0001));
|
|
ND_PRINT((ndo, ", SPSource-ID: %d",
|
|
(EXTRACT_32BITS(tptr) & 0x000fffff)));
|
|
tptr = tptr+4;
|
|
ND_PRINT((ndo, ", No of Trees: %x", *(tptr)));
|
|
|
|
tmp = *(tptr++);
|
|
|
|
len = len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN;
|
|
|
|
while (tmp)
|
|
{
|
|
if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN))
|
|
goto trunctlv;
|
|
|
|
ND_PRINT((ndo, "\n\t U:%d, M:%d, A:%d, RES:%d",
|
|
*(tptr) >> 7, (*(tptr) >> 6) & 0x01,
|
|
(*(tptr) >> 5) & 0x01, (*(tptr) & 0x1f)));
|
|
|
|
tptr++;
|
|
|
|
ND_PRINT((ndo, ", ECT: %08x", EXTRACT_32BITS(tptr)));
|
|
|
|
tptr = tptr + 4;
|
|
|
|
ND_PRINT((ndo, ", BVID: %d, SPVID: %d",
|
|
(EXTRACT_24BITS(tptr) >> 12) & 0x000fff,
|
|
EXTRACT_24BITS(tptr) & 0x000fff));
|
|
|
|
tptr = tptr + 3;
|
|
len = len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN;
|
|
tmp--;
|
|
}
|
|
|
|
break;
|
|
|
|
case ISIS_SUBTLV_SPBM_SI:
|
|
|
|
if (!ND_TTEST2(*(tptr), 6))
|
|
goto trunctlv;
|
|
|
|
ND_PRINT((ndo, "\n\t BMAC: %08x", EXTRACT_32BITS(tptr)));
|
|
tptr = tptr+4;
|
|
ND_PRINT((ndo, "%04x", EXTRACT_16BITS(tptr)));
|
|
tptr = tptr+2;
|
|
|
|
ND_PRINT((ndo, ", RES: %d, VID: %d", EXTRACT_16BITS(tptr) >> 12,
|
|
(EXTRACT_16BITS(tptr)) & 0x0fff));
|
|
|
|
tptr = tptr+2;
|
|
len = len - 8;
|
|
stlv_len = stlv_len - 8;
|
|
|
|
while (stlv_len)
|
|
{
|
|
ND_PRINT((ndo, "\n\t T: %d, R: %d, RES: %d, ISID: %d",
|
|
(EXTRACT_32BITS(tptr) >> 31),
|
|
(EXTRACT_32BITS(tptr) >> 30) & 0x01,
|
|
(EXTRACT_32BITS(tptr) >> 24) & 0x03f,
|
|
(EXTRACT_32BITS(tptr)) & 0x0ffffff));
|
|
|
|
tptr = tptr + 4;
|
|
len = len - 4;
|
|
stlv_len = stlv_len - 4;
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
|
|
trunctlv:
|
|
ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
|
|
return(1);
|
|
}
|
|
|
|
/* shared routine for printing system, node and lsp-ids */
|
|
static char *
|
|
isis_print_id(const uint8_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(netdissect_options *ndo,
|
|
const struct isis_metric_block *isis_metric_block)
|
|
{
|
|
ND_PRINT((ndo, ", 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))
|
|
ND_PRINT((ndo, "\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))
|
|
ND_PRINT((ndo, "\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))
|
|
ND_PRINT((ndo, "\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(netdissect_options *ndo,
|
|
const uint8_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)) {
|
|
ND_PRINT((ndo, "short IPv4 Reachability (%d vs %lu)",
|
|
length,
|
|
(unsigned long)sizeof(*tlv_ip_reach)));
|
|
return (0);
|
|
}
|
|
|
|
if (!ND_TTEST(*tlv_ip_reach))
|
|
return (0);
|
|
|
|
prefix_len = mask2plen(EXTRACT_32BITS(tlv_ip_reach->mask));
|
|
|
|
if (prefix_len == -1)
|
|
ND_PRINT((ndo, "%sIPv4 prefix: %s mask %s",
|
|
ident,
|
|
ipaddr_string(ndo, (tlv_ip_reach->prefix)),
|
|
ipaddr_string(ndo, (tlv_ip_reach->mask))));
|
|
else
|
|
ND_PRINT((ndo, "%sIPv4 prefix: %15s/%u",
|
|
ident,
|
|
ipaddr_string(ndo, (tlv_ip_reach->prefix)),
|
|
prefix_len));
|
|
|
|
ND_PRINT((ndo, ", 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))
|
|
ND_PRINT((ndo, "%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))
|
|
ND_PRINT((ndo, "%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))
|
|
ND_PRINT((ndo, "%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(netdissect_options *ndo,
|
|
const uint8_t *tptr, int subt, int subl,
|
|
const char *ident)
|
|
{
|
|
/* first lets see if we know the subTLVs name*/
|
|
ND_PRINT((ndo, "%s%s subTLV #%u, length: %u",
|
|
ident, tok2str(isis_ext_ip_reach_subtlv_values, "unknown", subt),
|
|
subt, subl));
|
|
|
|
if (!ND_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) {
|
|
ND_PRINT((ndo, ", 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) {
|
|
ND_PRINT((ndo, ", 0x%08x%08x",
|
|
EXTRACT_32BITS(tptr),
|
|
EXTRACT_32BITS(tptr+4)));
|
|
tptr+=8;
|
|
subl-=8;
|
|
}
|
|
break;
|
|
default:
|
|
if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl))
|
|
return(0);
|
|
break;
|
|
}
|
|
return(1);
|
|
|
|
trunctlv:
|
|
ND_PRINT((ndo, "%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(netdissect_options *ndo,
|
|
const uint8_t *tptr, u_int subt, u_int subl,
|
|
const char *ident)
|
|
{
|
|
u_int te_class,priority_level,gmpls_switch_cap;
|
|
union { /* int to float conversion buffer for several subTLVs */
|
|
float f;
|
|
uint32_t i;
|
|
} bw;
|
|
|
|
/* first lets see if we know the subTLVs name*/
|
|
ND_PRINT((ndo, "%s%s subTLV #%u, length: %u",
|
|
ident, tok2str(isis_ext_is_reach_subtlv_values, "unknown", subt),
|
|
subt, subl));
|
|
|
|
if (!ND_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) {
|
|
ND_PRINT((ndo, ", 0x%08x", EXTRACT_32BITS(tptr)));
|
|
if (subl == 8) /* rfc4205 */
|
|
ND_PRINT((ndo, ", 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 >= sizeof(struct in_addr))
|
|
ND_PRINT((ndo, ", %s", ipaddr_string(ndo, 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);
|
|
ND_PRINT((ndo, ", %.3f Mbps", bw.f * 8 / 1000000));
|
|
}
|
|
break;
|
|
case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW :
|
|
if (subl >= 32) {
|
|
for (te_class = 0; te_class < 8; te_class++) {
|
|
bw.i = EXTRACT_32BITS(tptr);
|
|
ND_PRINT((ndo, "%s TE-Class %u: %.3f Mbps",
|
|
ident,
|
|
te_class,
|
|
bw.f * 8 / 1000000));
|
|
tptr+=4;
|
|
}
|
|
}
|
|
break;
|
|
case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */
|
|
case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD:
|
|
ND_PRINT((ndo, "%sBandwidth Constraints Model ID: %s (%u)",
|
|
ident,
|
|
tok2str(diffserv_te_bc_values, "unknown", *tptr),
|
|
*tptr));
|
|
tptr++;
|
|
/* decode BCs until the subTLV ends */
|
|
for (te_class = 0; te_class < (subl-1)/4; te_class++) {
|
|
bw.i = EXTRACT_32BITS(tptr);
|
|
ND_PRINT((ndo, "%s Bandwidth constraint CT%u: %.3f Mbps",
|
|
ident,
|
|
te_class,
|
|
bw.f * 8 / 1000000));
|
|
tptr+=4;
|
|
}
|
|
break;
|
|
case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC:
|
|
if (subl >= 3)
|
|
ND_PRINT((ndo, ", %u", EXTRACT_24BITS(tptr)));
|
|
break;
|
|
case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE:
|
|
if (subl == 2) {
|
|
ND_PRINT((ndo, ", [ %s ] (0x%04x)",
|
|
bittok2str(isis_subtlv_link_attribute_values,
|
|
"Unknown",
|
|
EXTRACT_16BITS(tptr)),
|
|
EXTRACT_16BITS(tptr)));
|
|
}
|
|
break;
|
|
case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE:
|
|
if (subl >= 2) {
|
|
ND_PRINT((ndo, ", %s, Priority %u",
|
|
bittok2str(gmpls_link_prot_values, "none", *tptr),
|
|
*(tptr+1)));
|
|
}
|
|
break;
|
|
case ISIS_SUBTLV_SPB_METRIC:
|
|
if (subl >= 6) {
|
|
ND_PRINT((ndo, ", LM: %u", EXTRACT_24BITS(tptr)));
|
|
tptr=tptr+3;
|
|
ND_PRINT((ndo, ", P: %u", *(tptr)));
|
|
tptr++;
|
|
ND_PRINT((ndo, ", P-ID: %u", EXTRACT_16BITS(tptr)));
|
|
}
|
|
break;
|
|
case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR:
|
|
if (subl >= 36) {
|
|
gmpls_switch_cap = *tptr;
|
|
ND_PRINT((ndo, "%s Interface Switching Capability:%s",
|
|
ident,
|
|
tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap)));
|
|
ND_PRINT((ndo, ", LSP Encoding: %s",
|
|
tok2str(gmpls_encoding_values, "Unknown", *(tptr + 1))));
|
|
tptr+=4;
|
|
ND_PRINT((ndo, "%s Max LSP Bandwidth:", ident));
|
|
for (priority_level = 0; priority_level < 8; priority_level++) {
|
|
bw.i = EXTRACT_32BITS(tptr);
|
|
ND_PRINT((ndo, "%s priority level %d: %.3f Mbps",
|
|
ident,
|
|
priority_level,
|
|
bw.f * 8 / 1000000));
|
|
tptr+=4;
|
|
}
|
|
subl-=36;
|
|
switch (gmpls_switch_cap) {
|
|
case GMPLS_PSC1:
|
|
case GMPLS_PSC2:
|
|
case GMPLS_PSC3:
|
|
case GMPLS_PSC4:
|
|
bw.i = EXTRACT_32BITS(tptr);
|
|
ND_PRINT((ndo, "%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000));
|
|
ND_PRINT((ndo, "%s Interface MTU: %u", ident, EXTRACT_16BITS(tptr + 4)));
|
|
break;
|
|
case GMPLS_TSC:
|
|
bw.i = EXTRACT_32BITS(tptr);
|
|
ND_PRINT((ndo, "%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000));
|
|
ND_PRINT((ndo, "%s Indication %s", ident,
|
|
tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", *(tptr + 4))));
|
|
break;
|
|
default:
|
|
/* 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(ndo, tptr, "\n\t\t ", subl))
|
|
return(0);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl))
|
|
return(0);
|
|
break;
|
|
}
|
|
return(1);
|
|
|
|
trunctlv:
|
|
ND_PRINT((ndo, "%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(netdissect_options *ndo,
|
|
const uint8_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 (!ND_TTEST2(*tptr, NODE_ID_LEN))
|
|
return(0);
|
|
|
|
ND_PRINT((ndo, "%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 (!ND_TTEST2(*tptr, 3)) /* and is therefore skipped */
|
|
return(0);
|
|
ND_PRINT((ndo, ", Metric: %d", EXTRACT_24BITS(tptr)));
|
|
tptr+=3;
|
|
}
|
|
|
|
if (!ND_TTEST2(*tptr, 1))
|
|
return(0);
|
|
subtlv_sum_len=*(tptr++); /* read out subTLV length */
|
|
proc_bytes=NODE_ID_LEN+3+1;
|
|
ND_PRINT((ndo, ", %ssub-TLVs present",subtlv_sum_len ? "" : "no "));
|
|
if (subtlv_sum_len) {
|
|
ND_PRINT((ndo, " (%u)", subtlv_sum_len));
|
|
while (subtlv_sum_len>0) {
|
|
if (!ND_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(ndo, 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(netdissect_options *ndo,
|
|
const uint8_t *tptr, const char *ident)
|
|
{
|
|
if (!ND_TTEST2(*tptr, 2))
|
|
return(0);
|
|
|
|
ND_PRINT((ndo, "%s%s",
|
|
ident,
|
|
tok2str(isis_mt_values,
|
|
"Reserved for IETF Consensus",
|
|
ISIS_MASK_MTID(EXTRACT_16BITS(tptr)))));
|
|
|
|
ND_PRINT((ndo, " 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(netdissect_options *ndo,
|
|
const uint8_t *tptr, const char *ident, uint16_t afi)
|
|
{
|
|
char ident_buffer[20];
|
|
#ifdef INET6
|
|
uint8_t prefix[sizeof(struct in6_addr)]; /* shared copy buffer for IPv4 and IPv6 prefixes */
|
|
#else
|
|
uint8_t prefix[sizeof(struct in_addr)]; /* shared copy buffer for IPv4 prefixes */
|
|
#endif
|
|
u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen;
|
|
|
|
if (!ND_TTEST2(*tptr, 4))
|
|
return (0);
|
|
metric = EXTRACT_32BITS(tptr);
|
|
processed=4;
|
|
tptr+=4;
|
|
|
|
if (afi == AF_INET) {
|
|
if (!ND_TTEST2(*tptr, 1)) /* fetch status byte */
|
|
return (0);
|
|
status_byte=*(tptr++);
|
|
bit_length = status_byte&0x3f;
|
|
if (bit_length > 32) {
|
|
ND_PRINT((ndo, "%sIPv4 prefix: bad bit length %u",
|
|
ident,
|
|
bit_length));
|
|
return (0);
|
|
}
|
|
processed++;
|
|
#ifdef INET6
|
|
} else if (afi == AF_INET6) {
|
|
if (!ND_TTEST2(*tptr, 1)) /* fetch status & prefix_len byte */
|
|
return (0);
|
|
status_byte=*(tptr++);
|
|
bit_length=*(tptr++);
|
|
if (bit_length > 128) {
|
|
ND_PRINT((ndo, "%sIPv6 prefix: bad bit length %u",
|
|
ident,
|
|
bit_length));
|
|
return (0);
|
|
}
|
|
processed+=2;
|
|
#endif
|
|
} else
|
|
return (0); /* somebody is fooling us */
|
|
|
|
byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */
|
|
|
|
if (!ND_TTEST2(*tptr, byte_length))
|
|
return (0);
|
|
memset(prefix, 0, sizeof prefix); /* 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 == AF_INET)
|
|
ND_PRINT((ndo, "%sIPv4 prefix: %15s/%u",
|
|
ident,
|
|
ipaddr_string(ndo, prefix),
|
|
bit_length));
|
|
#ifdef INET6
|
|
if (afi == AF_INET6)
|
|
ND_PRINT((ndo, "%sIPv6 prefix: %s/%u",
|
|
ident,
|
|
ip6addr_string(ndo, prefix),
|
|
bit_length));
|
|
#endif
|
|
|
|
ND_PRINT((ndo, ", Distribution: %s, Metric: %u",
|
|
ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up",
|
|
metric));
|
|
|
|
if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
|
|
ND_PRINT((ndo, ", sub-TLVs present"));
|
|
#ifdef INET6
|
|
if (afi == AF_INET6)
|
|
ND_PRINT((ndo, ", %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 ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
|
|
#ifdef INET6
|
|
|| (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte))
|
|
#endif
|
|
) {
|
|
/* 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 (!ND_TTEST2(*tptr, 1))
|
|
return (0);
|
|
sublen=*(tptr++);
|
|
processed+=sublen+1;
|
|
ND_PRINT((ndo, " (%u)", sublen)); /* print out subTLV length */
|
|
|
|
while (sublen>0) {
|
|
if (!ND_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(ndo, 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(netdissect_options *ndo,
|
|
const uint8_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;
|
|
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;
|
|
|
|
uint8_t pdu_type, max_area, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len;
|
|
uint8_t ext_is_len, ext_ip_len, mt_len;
|
|
const uint8_t *optr, *pptr, *tptr;
|
|
u_short packet_len,pdu_len, key_id;
|
|
u_int i,vendor_id;
|
|
int sigcheck;
|
|
|
|
packet_len=length;
|
|
optr = p; /* initialize the _o_riginal pointer to the packet start -
|
|
need it for parsing the checksum TLV and authentication
|
|
TLV verification */
|
|
isis_header = (const struct isis_common_header *)p;
|
|
ND_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 = (struct isis_lsp_header *)pptr;
|
|
header_csnp = (const struct isis_csnp_header *)pptr;
|
|
header_psnp = (const struct isis_psnp_header *)pptr;
|
|
|
|
if (!ndo->ndo_eflag)
|
|
ND_PRINT((ndo, "IS-IS"));
|
|
|
|
/*
|
|
* Sanity checking of the header.
|
|
*/
|
|
|
|
if (isis_header->version != ISIS_VERSION) {
|
|
ND_PRINT((ndo, "version %d packet not supported", isis_header->version));
|
|
return (0);
|
|
}
|
|
|
|
if ((isis_header->id_length != SYSTEM_ID_LEN) && (isis_header->id_length != 0)) {
|
|
ND_PRINT((ndo, "system ID length of %d is not supported",
|
|
isis_header->id_length));
|
|
return (0);
|
|
}
|
|
|
|
if (isis_header->pdu_version != ISIS_VERSION) {
|
|
ND_PRINT((ndo, "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:
|
|
ND_PRINT((ndo, "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 ) {
|
|
ND_PRINT((ndo, "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 (ndo->ndo_vflag < 1) {
|
|
ND_PRINT((ndo, "%s%s",
|
|
ndo->ndo_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:
|
|
ND_PRINT((ndo, ", src-id %s",
|
|
isis_print_id(header_iih_lan->source_id, SYSTEM_ID_LEN)));
|
|
ND_PRINT((ndo, ", 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:
|
|
ND_PRINT((ndo, ", 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:
|
|
ND_PRINT((ndo, ", 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:
|
|
ND_PRINT((ndo, ", src-id %s", isis_print_id(header_csnp->source_id, NODE_ID_LEN)));
|
|
break;
|
|
case ISIS_PDU_L1_PSNP:
|
|
case ISIS_PDU_L2_PSNP:
|
|
ND_PRINT((ndo, ", src-id %s", isis_print_id(header_psnp->source_id, NODE_ID_LEN)));
|
|
break;
|
|
|
|
}
|
|
ND_PRINT((ndo, ", length %u", length));
|
|
|
|
return(1);
|
|
}
|
|
|
|
/* ok they seem to want to know everything - lets fully decode it */
|
|
ND_PRINT((ndo, "%slength %u", ndo->ndo_eflag ? "" : ", ", length));
|
|
|
|
ND_PRINT((ndo, "\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 (ndo->ndo_vflag > 1) {
|
|
if (!print_unknown_data(ndo, 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)) {
|
|
ND_PRINT((ndo, ", 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;
|
|
}
|
|
|
|
ND_TCHECK(*header_iih_lan);
|
|
ND_PRINT((ndo, "\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)));
|
|
|
|
ND_PRINT((ndo, "\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 (ndo->ndo_vflag > 1) {
|
|
if (!print_unknown_data(ndo, 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)) {
|
|
ND_PRINT((ndo, ", 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;
|
|
}
|
|
|
|
ND_TCHECK(*header_iih_ptp);
|
|
ND_PRINT((ndo, "\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)));
|
|
|
|
ND_PRINT((ndo, "\n\t circuit-id: 0x%02x, PDU length: %u",
|
|
header_iih_ptp->circuit_id,
|
|
pdu_len));
|
|
|
|
if (ndo->ndo_vflag > 1) {
|
|
if (!print_unknown_data(ndo, 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)) {
|
|
ND_PRINT((ndo, ", 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;
|
|
}
|
|
|
|
ND_TCHECK(*header_lsp);
|
|
ND_PRINT((ndo, "\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)));
|
|
|
|
|
|
osi_print_cksum(ndo, (uint8_t *)header_lsp->lsp_id,
|
|
EXTRACT_16BITS(header_lsp->checksum), 12, length-12);
|
|
|
|
/*
|
|
* Clear checksum and lifetime prior to signature verification.
|
|
*/
|
|
header_lsp->checksum[0] = 0;
|
|
header_lsp->checksum[1] = 0;
|
|
header_lsp->remaining_lifetime[0] = 0;
|
|
header_lsp->remaining_lifetime[1] = 0;
|
|
|
|
|
|
ND_PRINT((ndo, ", 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)) {
|
|
ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : ""));
|
|
ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : ""));
|
|
ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : ""));
|
|
ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : ""));
|
|
ND_PRINT((ndo, "ATT bit set, "));
|
|
}
|
|
ND_PRINT((ndo, "%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : ""));
|
|
ND_PRINT((ndo, "%s ]", tok2str(isis_lsp_istype_values, "Unknown(0x%x)",
|
|
ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock))));
|
|
|
|
if (ndo->ndo_vflag > 1) {
|
|
if (!print_unknown_data(ndo, 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)) {
|
|
ND_PRINT((ndo, ", 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;
|
|
}
|
|
|
|
ND_TCHECK(*header_csnp);
|
|
ND_PRINT((ndo, "\n\t source-id: %s, PDU length: %u",
|
|
isis_print_id(header_csnp->source_id, NODE_ID_LEN),
|
|
pdu_len));
|
|
ND_PRINT((ndo, "\n\t start lsp-id: %s",
|
|
isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN)));
|
|
ND_PRINT((ndo, "\n\t end lsp-id: %s",
|
|
isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN)));
|
|
|
|
if (ndo->ndo_vflag > 1) {
|
|
if (!print_unknown_data(ndo, 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)) {
|
|
ND_PRINT((ndo, "- 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;
|
|
}
|
|
|
|
ND_TCHECK(*header_psnp);
|
|
ND_PRINT((ndo, "\n\t source-id: %s, PDU length: %u",
|
|
isis_print_id(header_psnp->source_id, NODE_ID_LEN),
|
|
pdu_len));
|
|
|
|
if (ndo->ndo_vflag > 1) {
|
|
if (!print_unknown_data(ndo, 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:
|
|
(void)print_unknown_data(ndo, pptr, "\n\t ", length);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Now print the TLV's.
|
|
*/
|
|
|
|
while (packet_len >= 2) {
|
|
if (pptr == ndo->ndo_snapend) {
|
|
return (1);
|
|
}
|
|
|
|
if (!ND_TTEST2(*pptr, 2)) {
|
|
ND_PRINT((ndo, "\n\t\t packet exceeded snapshot (%ld) bytes",
|
|
(long)(pptr - ndo->ndo_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*/
|
|
ND_PRINT((ndo, "\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 */
|
|
continue;
|
|
|
|
/* now check if we have a decoder otherwise do a hexdump at the end*/
|
|
switch (tlv_type) {
|
|
case ISIS_TLV_AREA_ADDR:
|
|
if (!ND_TTEST2(*tptr, 1))
|
|
goto trunctlv;
|
|
alen = *tptr++;
|
|
while (tmp && alen < tmp) {
|
|
ND_PRINT((ndo, "\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 (!ND_TTEST2(*tptr, 1))
|
|
goto trunctlv;
|
|
alen = *tptr++;
|
|
}
|
|
break;
|
|
case ISIS_TLV_ISNEIGH:
|
|
while (tmp >= ETHER_ADDR_LEN) {
|
|
if (!ND_TTEST2(*tptr, ETHER_ADDR_LEN))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\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 (!ND_TTEST2(*tptr, 1) || tmp < 3) /* min. TLV length */
|
|
goto trunctlv;
|
|
lan_alen = *tptr++; /* LAN address length */
|
|
if (lan_alen == 0) {
|
|
ND_PRINT((ndo, "\n\t LAN address length 0 bytes (invalid)"));
|
|
break;
|
|
}
|
|
tmp --;
|
|
ND_PRINT((ndo, "\n\t LAN address length %u bytes ", lan_alen));
|
|
while (tmp >= lan_alen) {
|
|
if (!ND_TTEST2(*tptr, lan_alen))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\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:
|
|
mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
|
|
if (mt_len == 0) /* did something go wrong ? */
|
|
goto trunctlv;
|
|
tptr+=mt_len;
|
|
tmp-=mt_len;
|
|
while (tmp >= 2+NODE_ID_LEN+3+1) {
|
|
ext_is_len = isis_print_ext_is_reach(ndo, 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(ndo, 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(ndo, 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 (!ND_TTEST2(*tptr,1)) /* check if there is one byte left to read out the virtual flag */
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\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 (!ND_TTEST(*tlv_is_reach))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\n\t IS Neighbor: %s",
|
|
isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN)));
|
|
isis_print_metric_block(ndo, &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 (!ND_TTEST(*tlv_es_reach))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\n\t ES Neighbor: %s",
|
|
isis_print_id(tlv_es_reach->neighbor_sysid, SYSTEM_ID_LEN)));
|
|
isis_print_metric_block(ndo, &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(ndo, 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(ndo, tptr, "\n\t ", AF_INET);
|
|
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:
|
|
mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
|
|
if (mt_len == 0) { /* did something go wrong ? */
|
|
goto trunctlv;
|
|
}
|
|
tptr+=mt_len;
|
|
tmp-=mt_len;
|
|
|
|
while (tmp>0) {
|
|
ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET);
|
|
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(ndo, tptr, "\n\t ", AF_INET6);
|
|
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:
|
|
mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
|
|
if (mt_len == 0) { /* did something go wrong ? */
|
|
goto trunctlv;
|
|
}
|
|
tptr+=mt_len;
|
|
tmp-=mt_len;
|
|
|
|
while (tmp>0) {
|
|
ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6);
|
|
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>=sizeof(struct in6_addr)) {
|
|
if (!ND_TTEST2(*tptr, sizeof(struct in6_addr)))
|
|
goto trunctlv;
|
|
|
|
ND_PRINT((ndo, "\n\t IPv6 interface address: %s",
|
|
ip6addr_string(ndo, tptr)));
|
|
|
|
tptr += sizeof(struct in6_addr);
|
|
tmp -= sizeof(struct in6_addr);
|
|
}
|
|
break;
|
|
#endif
|
|
case ISIS_TLV_AUTH:
|
|
if (!ND_TTEST2(*tptr, 1))
|
|
goto trunctlv;
|
|
|
|
ND_PRINT((ndo, "\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 (!ND_TTEST2(*(tptr + i), 1))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "%c", *(tptr + i)));
|
|
}
|
|
break;
|
|
case ISIS_SUBTLV_AUTH_MD5:
|
|
for(i=1;i<tlv_len;i++) {
|
|
if (!ND_TTEST2(*(tptr + i), 1))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "%02x", *(tptr + i)));
|
|
}
|
|
if (tlv_len != ISIS_SUBTLV_AUTH_MD5_LEN+1)
|
|
ND_PRINT((ndo, ", (malformed subTLV) "));
|
|
|
|
#ifdef HAVE_LIBCRYPTO
|
|
sigcheck = signature_verify(ndo, optr, length,
|
|
(unsigned char *)tptr + 1);
|
|
#else
|
|
sigcheck = CANT_CHECK_SIGNATURE;
|
|
#endif
|
|
ND_PRINT((ndo, " (%s)", tok2str(signature_check_values, "Unknown", sigcheck)));
|
|
|
|
break;
|
|
case ISIS_SUBTLV_AUTH_GENERIC:
|
|
key_id = EXTRACT_16BITS((tptr+1));
|
|
ND_PRINT((ndo, "%u, password: ", key_id));
|
|
for(i=1 + sizeof(uint16_t);i<tlv_len;i++) {
|
|
if (!ND_TTEST2(*(tptr + i), 1))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "%02x", *(tptr + i)));
|
|
}
|
|
break;
|
|
case ISIS_SUBTLV_AUTH_PRIVATE:
|
|
default:
|
|
if (!print_unknown_data(ndo, 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 (!ND_TTEST2(*tptr, 1))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\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 (!ND_TTEST2(tlv_ptp_adj->extd_local_circuit_id,
|
|
sizeof(tlv_ptp_adj->extd_local_circuit_id)))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\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 (!ND_TTEST2(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\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 (!ND_TTEST2(tlv_ptp_adj->neighbor_extd_local_circuit_id,
|
|
sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\n\t Neighbor Extended Local circuit-ID: 0x%08x",
|
|
EXTRACT_32BITS(tlv_ptp_adj->neighbor_extd_local_circuit_id)));
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_PROTOCOLS:
|
|
ND_PRINT((ndo, "\n\t NLPID(s): "));
|
|
while (tmp>0) {
|
|
if (!ND_TTEST2(*(tptr), 1))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "%s (0x%02x)",
|
|
tok2str(nlpid_values,
|
|
"unknown",
|
|
*tptr),
|
|
*tptr));
|
|
if (tmp>1) /* further NPLIDs ? - put comma */
|
|
ND_PRINT((ndo, ", "));
|
|
tptr++;
|
|
tmp--;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_MT_PORT_CAP:
|
|
{
|
|
if (!ND_TTEST2(*(tptr), 2))
|
|
goto trunctlv;
|
|
|
|
ND_PRINT((ndo, "\n\t RES: %d, MTID(s): %d",
|
|
(EXTRACT_16BITS (tptr) >> 12),
|
|
(EXTRACT_16BITS (tptr) & 0x0fff)));
|
|
|
|
tmp = tmp-2;
|
|
tptr = tptr+2;
|
|
|
|
if (tmp)
|
|
isis_print_mt_port_cap_subtlv(ndo, tptr, tmp);
|
|
|
|
break;
|
|
}
|
|
|
|
case ISIS_TLV_MT_CAPABILITY:
|
|
|
|
if (!ND_TTEST2(*(tptr), 2))
|
|
goto trunctlv;
|
|
|
|
ND_PRINT((ndo, "\n\t O: %d, RES: %d, MTID(s): %d",
|
|
(EXTRACT_16BITS(tptr) >> 15) & 0x01,
|
|
(EXTRACT_16BITS(tptr) >> 12) & 0x07,
|
|
EXTRACT_16BITS(tptr) & 0x0fff));
|
|
|
|
tmp = tmp-2;
|
|
tptr = tptr+2;
|
|
|
|
if (tmp)
|
|
isis_print_mt_capability_subtlv(ndo, tptr, tmp);
|
|
|
|
break;
|
|
|
|
case ISIS_TLV_TE_ROUTER_ID:
|
|
if (!ND_TTEST2(*pptr, sizeof(struct in_addr)))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\n\t Traffic Engineering Router ID: %s", ipaddr_string(ndo, pptr)));
|
|
break;
|
|
|
|
case ISIS_TLV_IPADDR:
|
|
while (tmp>=sizeof(struct in_addr)) {
|
|
if (!ND_TTEST2(*tptr, sizeof(struct in_addr)))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr)));
|
|
tptr += sizeof(struct in_addr);
|
|
tmp -= sizeof(struct in_addr);
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_HOSTNAME:
|
|
ND_PRINT((ndo, "\n\t Hostname: "));
|
|
while (tmp>0) {
|
|
if (!ND_TTEST2(*tptr, 1))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "%c", *tptr++));
|
|
tmp--;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_SHARED_RISK_GROUP:
|
|
if (tmp < NODE_ID_LEN)
|
|
break;
|
|
if (!ND_TTEST2(*tptr, NODE_ID_LEN))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\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 (!ND_TTEST2(*tptr, 1))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, ", Flags: [%s]", ISIS_MASK_TLV_SHARED_RISK_GROUP(*tptr++) ? "numbered" : "unnumbered"));
|
|
tmp--;
|
|
|
|
if (tmp < sizeof(struct in_addr))
|
|
break;
|
|
if (!ND_TTEST2(*tptr, sizeof(struct in_addr)))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr)));
|
|
tptr+=sizeof(struct in_addr);
|
|
tmp-=sizeof(struct in_addr);
|
|
|
|
if (tmp < sizeof(struct in_addr))
|
|
break;
|
|
if (!ND_TTEST2(*tptr, sizeof(struct in_addr)))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\n\t IPv4 neighbor address: %s", ipaddr_string(ndo, tptr)));
|
|
tptr+=sizeof(struct in_addr);
|
|
tmp-=sizeof(struct in_addr);
|
|
|
|
while (tmp>=4) {
|
|
if (!ND_TTEST2(*tptr, 4))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\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 (!ND_TTEST((tlv_lsp->lsp_id)[LSP_ID_LEN-1]))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\n\t lsp-id: %s",
|
|
isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN)));
|
|
if (!ND_TTEST2(tlv_lsp->sequence_number, 4))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, ", seq: 0x%08x", EXTRACT_32BITS(tlv_lsp->sequence_number)));
|
|
if (!ND_TTEST2(tlv_lsp->remaining_lifetime, 2))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, ", lifetime: %5ds", EXTRACT_16BITS(tlv_lsp->remaining_lifetime)));
|
|
if (!ND_TTEST2(tlv_lsp->checksum, 2))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, ", chksum: 0x%04x", EXTRACT_16BITS(tlv_lsp->checksum)));
|
|
tmp-=sizeof(struct isis_tlv_lsp);
|
|
tlv_lsp++;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_CHECKSUM:
|
|
if (tmp < ISIS_TLV_CHECKSUM_MINLEN)
|
|
break;
|
|
if (!ND_TTEST2(*tptr, ISIS_TLV_CHECKSUM_MINLEN))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\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
|
|
*/
|
|
osi_print_cksum(ndo, optr, EXTRACT_16BITS(tptr), tptr-optr, length);
|
|
break;
|
|
|
|
case ISIS_TLV_MT_SUPPORTED:
|
|
if (tmp < ISIS_TLV_MT_SUPPORTED_MINLEN)
|
|
break;
|
|
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(ndo, tptr, "\n\t ");
|
|
if (mt_len == 0) /* did something go wrong ? */
|
|
goto trunctlv;
|
|
tptr+=mt_len;
|
|
tmp-=mt_len;
|
|
} else {
|
|
ND_PRINT((ndo, "\n\t malformed MT-ID"));
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_RESTART_SIGNALING:
|
|
/* first attempt to decode the flags */
|
|
if (tmp < ISIS_TLV_RESTART_SIGNALING_FLAGLEN)
|
|
break;
|
|
if (!ND_TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\n\t Flags [%s]",
|
|
bittok2str(isis_restart_flag_values, "none", *tptr)));
|
|
tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
|
|
tmp-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
|
|
|
|
/* is there anything other than the flags field? */
|
|
if (tmp == 0)
|
|
break;
|
|
|
|
if (tmp < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN)
|
|
break;
|
|
if (!ND_TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN))
|
|
goto trunctlv;
|
|
|
|
ND_PRINT((ndo, ", Remaining holding time %us", EXTRACT_16BITS(tptr)));
|
|
tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
|
|
tmp-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
|
|
|
|
/* is there an additional sysid field present ?*/
|
|
if (tmp == SYSTEM_ID_LEN) {
|
|
if (!ND_TTEST2(*tptr, SYSTEM_ID_LEN))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, ", for %s", isis_print_id(tptr,SYSTEM_ID_LEN)));
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_IDRP_INFO:
|
|
if (tmp < ISIS_TLV_IDRP_INFO_MINLEN)
|
|
break;
|
|
if (!ND_TTEST2(*tptr, ISIS_TLV_IDRP_INFO_MINLEN))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\n\t Inter-Domain Information Type: %s",
|
|
tok2str(isis_subtlv_idrp_values,
|
|
"Unknown (0x%02x)",
|
|
*tptr)));
|
|
switch (*tptr++) {
|
|
case ISIS_SUBTLV_IDRP_ASN:
|
|
if (!ND_TTEST2(*tptr, 2)) /* fetch AS number */
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "AS Number: %u", EXTRACT_16BITS(tptr)));
|
|
break;
|
|
case ISIS_SUBTLV_IDRP_LOCAL:
|
|
case ISIS_SUBTLV_IDRP_RES:
|
|
default:
|
|
if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_len - 1))
|
|
return(0);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISIS_TLV_LSP_BUFFERSIZE:
|
|
if (tmp < ISIS_TLV_LSP_BUFFERSIZE_MINLEN)
|
|
break;
|
|
if (!ND_TTEST2(*tptr, ISIS_TLV_LSP_BUFFERSIZE_MINLEN))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\n\t LSP Buffersize: %u", EXTRACT_16BITS(tptr)));
|
|
break;
|
|
|
|
case ISIS_TLV_PART_DIS:
|
|
while (tmp >= SYSTEM_ID_LEN) {
|
|
if (!ND_TTEST2(*tptr, SYSTEM_ID_LEN))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\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 (!ND_TTEST2(*tptr, sizeof(struct isis_metric_block)))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\n\t Metric Block"));
|
|
isis_print_metric_block(ndo, (const struct isis_metric_block *)tptr);
|
|
tptr+=sizeof(struct isis_metric_block);
|
|
tmp-=sizeof(struct isis_metric_block);
|
|
|
|
while(tmp>0) {
|
|
if (!ND_TTEST2(*tptr, 1))
|
|
goto trunctlv;
|
|
prefix_len=*tptr++; /* read out prefix length in semioctets*/
|
|
if (prefix_len < 2) {
|
|
ND_PRINT((ndo, "\n\t\tAddress: prefix length %u < 2", prefix_len));
|
|
break;
|
|
}
|
|
tmp--;
|
|
if (tmp < prefix_len/2)
|
|
break;
|
|
if (!ND_TTEST2(*tptr, prefix_len / 2))
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\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 < ISIS_TLV_IIH_SEQNR_MINLEN)
|
|
break;
|
|
if (!ND_TTEST2(*tptr, ISIS_TLV_IIH_SEQNR_MINLEN)) /* check if four bytes are on the wire */
|
|
goto trunctlv;
|
|
ND_PRINT((ndo, "\n\t Sequence number: %u", EXTRACT_32BITS(tptr)));
|
|
break;
|
|
|
|
case ISIS_TLV_VENDOR_PRIVATE:
|
|
if (tmp < ISIS_TLV_VENDOR_PRIVATE_MINLEN)
|
|
break;
|
|
if (!ND_TTEST2(*tptr, ISIS_TLV_VENDOR_PRIVATE_MINLEN)) /* check if enough byte for a full oui */
|
|
goto trunctlv;
|
|
vendor_id = EXTRACT_24BITS(tptr);
|
|
ND_PRINT((ndo, "\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(ndo, 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 (ndo->ndo_vflag <= 1) {
|
|
if (!print_unknown_data(ndo, pptr, "\n\t\t", tlv_len))
|
|
return(0);
|
|
}
|
|
break;
|
|
}
|
|
/* do we want to see an additionally hexdump ? */
|
|
if (ndo->ndo_vflag> 1) {
|
|
if (!print_unknown_data(ndo, pptr, "\n\t ", tlv_len))
|
|
return(0);
|
|
}
|
|
|
|
pptr += tlv_len;
|
|
packet_len -= tlv_len;
|
|
}
|
|
|
|
if (packet_len != 0) {
|
|
ND_PRINT((ndo, "\n\t %u straggler bytes", packet_len));
|
|
}
|
|
return (1);
|
|
|
|
trunc:
|
|
ND_PRINT((ndo, "[|isis]"));
|
|
return (1);
|
|
|
|
trunctlv:
|
|
ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
|
|
return(1);
|
|
}
|
|
|
|
static void
|
|
osi_print_cksum(netdissect_options *ndo,
|
|
const uint8_t *pptr, uint16_t checksum,
|
|
u_int checksum_offset, u_int length)
|
|
{
|
|
uint16_t calculated_checksum;
|
|
|
|
/* do not attempt to verify the checksum if it is zero,
|
|
* if the total length is nonsense,
|
|
* if the offset is nonsense,
|
|
* or the base pointer is not sane
|
|
*/
|
|
if (!checksum
|
|
|| length > (u_int)ndo->ndo_snaplen
|
|
|| checksum_offset > (uint)ndo->ndo_snaplen
|
|
|| checksum_offset > length) {
|
|
ND_PRINT((ndo, "(unverified)"));
|
|
} else {
|
|
unsigned char *truncated = "trunc";
|
|
#if 0
|
|
printf("\nosi_print_cksum: %p %u %u %u\n", pptr, checksum_offset, length, ndo->ndo_snaplen);
|
|
ND_TCHECK2(pptr, checksum_offset+length);
|
|
#endif
|
|
calculated_checksum = create_osi_cksum(pptr, checksum_offset, length);
|
|
if (checksum == calculated_checksum) {
|
|
ND_PRINT((ndo, " (correct)"));
|
|
} else {
|
|
truncated = "incorrect";
|
|
#if 0
|
|
trunc:
|
|
#endif
|
|
ND_PRINT((ndo, " (%s should be 0x%04x)", truncated, calculated_checksum));
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Local Variables:
|
|
* c-style: whitesmith
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|