/* * Copyright (c) 1992, 1993, 1994, 1995, 1996 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that: (1) source code distributions * retain the above copyright notice and this paragraph in its entirety, (2) * distributions including binary code include the above copyright notice and * this paragraph in its entirety in the documentation or other materials * provided with the distribution, and (3) all advertising materials mentioning * features or use of this software display the following acknowledgement: * ``This product includes software developed by the University of California, * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of * the University nor the names of its contributors may be used to endorse * or promote products derived from this software without specific prior * written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. * * Original code by Matt Thomas, Digital Equipment Corporation * * Extensively modified by Hannes Gredler (hannes@juniper.net) for more * complete IS-IS & CLNP support. */ #define NETDISSECT_REWORKED #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include "interface.h" #include "addrtoname.h" #include "ether.h" #include "nlpid.h" #include "extract.h" #include "gmpls.h" #include "oui.h" #include "signature.h" /* * IS-IS is defined in ISO 10589. Look there for protocol definitions. */ #define SYSTEM_ID_LEN ETHER_ADDR_LEN #define NODE_ID_LEN SYSTEM_ID_LEN+1 #define LSP_ID_LEN SYSTEM_ID_LEN+2 #define ISIS_VERSION 1 #define ESIS_VERSION 1 #define CLNP_VERSION 1 #define ISIS_PDU_TYPE_MASK 0x1F #define ESIS_PDU_TYPE_MASK 0x1F #define CLNP_PDU_TYPE_MASK 0x1F #define CLNP_FLAG_MASK 0xE0 #define ISIS_LAN_PRIORITY_MASK 0x7F #define ISIS_PDU_L1_LAN_IIH 15 #define ISIS_PDU_L2_LAN_IIH 16 #define ISIS_PDU_PTP_IIH 17 #define ISIS_PDU_L1_LSP 18 #define ISIS_PDU_L2_LSP 20 #define ISIS_PDU_L1_CSNP 24 #define ISIS_PDU_L2_CSNP 25 #define ISIS_PDU_L1_PSNP 26 #define ISIS_PDU_L2_PSNP 27 static const struct tok isis_pdu_values[] = { { ISIS_PDU_L1_LAN_IIH, "L1 Lan IIH"}, { ISIS_PDU_L2_LAN_IIH, "L2 Lan IIH"}, { ISIS_PDU_PTP_IIH, "p2p IIH"}, { ISIS_PDU_L1_LSP, "L1 LSP"}, { ISIS_PDU_L2_LSP, "L2 LSP"}, { ISIS_PDU_L1_CSNP, "L1 CSNP"}, { ISIS_PDU_L2_CSNP, "L2 CSNP"}, { ISIS_PDU_L1_PSNP, "L1 PSNP"}, { ISIS_PDU_L2_PSNP, "L2 PSNP"}, { 0, NULL} }; /* * A TLV is a tuple of a type, length and a value and is normally used for * encoding information in all sorts of places. This is an enumeration of * the well known types. * * list taken from rfc3359 plus some memory from veterans ;-) */ #define ISIS_TLV_AREA_ADDR 1 /* iso10589 */ #define ISIS_TLV_IS_REACH 2 /* iso10589 */ #define ISIS_TLV_ESNEIGH 3 /* iso10589 */ #define ISIS_TLV_PART_DIS 4 /* iso10589 */ #define ISIS_TLV_PREFIX_NEIGH 5 /* iso10589 */ #define ISIS_TLV_ISNEIGH 6 /* iso10589 */ #define ISIS_TLV_ISNEIGH_VARLEN 7 /* iso10589 */ #define ISIS_TLV_PADDING 8 /* iso10589 */ #define ISIS_TLV_LSP 9 /* iso10589 */ #define ISIS_TLV_AUTH 10 /* iso10589, rfc3567 */ #define ISIS_TLV_CHECKSUM 12 /* rfc3358 */ #define ISIS_TLV_CHECKSUM_MINLEN 2 #define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */ #define ISIS_TLV_LSP_BUFFERSIZE_MINLEN 2 #define ISIS_TLV_EXT_IS_REACH 22 /* draft-ietf-isis-traffic-05 */ #define ISIS_TLV_IS_ALIAS_ID 24 /* draft-ietf-isis-ext-lsp-frags-02 */ #define ISIS_TLV_DECNET_PHASE4 42 #define ISIS_TLV_LUCENT_PRIVATE 66 #define ISIS_TLV_INT_IP_REACH 128 /* rfc1195, rfc2966 */ #define ISIS_TLV_PROTOCOLS 129 /* rfc1195 */ #define ISIS_TLV_EXT_IP_REACH 130 /* rfc1195, rfc2966 */ #define ISIS_TLV_IDRP_INFO 131 /* rfc1195 */ #define ISIS_TLV_IDRP_INFO_MINLEN 1 #define ISIS_TLV_IPADDR 132 /* rfc1195 */ #define ISIS_TLV_IPAUTH 133 /* rfc1195 */ #define ISIS_TLV_TE_ROUTER_ID 134 /* draft-ietf-isis-traffic-05 */ #define ISIS_TLV_EXTD_IP_REACH 135 /* draft-ietf-isis-traffic-05 */ #define ISIS_TLV_HOSTNAME 137 /* rfc2763 */ #define ISIS_TLV_SHARED_RISK_GROUP 138 /* draft-ietf-isis-gmpls-extensions */ #define ISIS_TLV_MT_PORT_CAP 143 /* rfc6165 */ #define ISIS_TLV_MT_CAPABILITY 144 /* rfc6329 */ #define ISIS_TLV_NORTEL_PRIVATE1 176 #define ISIS_TLV_NORTEL_PRIVATE2 177 #define ISIS_TLV_RESTART_SIGNALING 211 /* rfc3847 */ #define ISIS_TLV_RESTART_SIGNALING_FLAGLEN 1 #define ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN 2 #define ISIS_TLV_MT_IS_REACH 222 /* draft-ietf-isis-wg-multi-topology-05 */ #define ISIS_TLV_MT_SUPPORTED 229 /* draft-ietf-isis-wg-multi-topology-05 */ #define ISIS_TLV_MT_SUPPORTED_MINLEN 2 #define ISIS_TLV_IP6ADDR 232 /* draft-ietf-isis-ipv6-02 */ #define ISIS_TLV_MT_IP_REACH 235 /* draft-ietf-isis-wg-multi-topology-05 */ #define ISIS_TLV_IP6_REACH 236 /* draft-ietf-isis-ipv6-02 */ #define ISIS_TLV_MT_IP6_REACH 237 /* draft-ietf-isis-wg-multi-topology-05 */ #define ISIS_TLV_PTP_ADJ 240 /* rfc3373 */ #define ISIS_TLV_IIH_SEQNR 241 /* draft-shen-isis-iih-sequence-00 */ #define ISIS_TLV_IIH_SEQNR_MINLEN 4 #define ISIS_TLV_VENDOR_PRIVATE 250 /* draft-ietf-isis-experimental-tlv-01 */ #define ISIS_TLV_VENDOR_PRIVATE_MINLEN 3 static const struct tok isis_tlv_values[] = { { ISIS_TLV_AREA_ADDR, "Area address(es)"}, { ISIS_TLV_IS_REACH, "IS Reachability"}, { ISIS_TLV_ESNEIGH, "ES Neighbor(s)"}, { ISIS_TLV_PART_DIS, "Partition DIS"}, { ISIS_TLV_PREFIX_NEIGH, "Prefix Neighbors"}, { ISIS_TLV_ISNEIGH, "IS Neighbor(s)"}, { ISIS_TLV_ISNEIGH_VARLEN, "IS Neighbor(s) (variable length)"}, { ISIS_TLV_PADDING, "Padding"}, { ISIS_TLV_LSP, "LSP entries"}, { ISIS_TLV_AUTH, "Authentication"}, { ISIS_TLV_CHECKSUM, "Checksum"}, { ISIS_TLV_LSP_BUFFERSIZE, "LSP Buffersize"}, { ISIS_TLV_EXT_IS_REACH, "Extended IS Reachability"}, { ISIS_TLV_IS_ALIAS_ID, "IS Alias ID"}, { ISIS_TLV_DECNET_PHASE4, "DECnet Phase IV"}, { ISIS_TLV_LUCENT_PRIVATE, "Lucent Proprietary"}, { ISIS_TLV_INT_IP_REACH, "IPv4 Internal Reachability"}, { ISIS_TLV_PROTOCOLS, "Protocols supported"}, { ISIS_TLV_EXT_IP_REACH, "IPv4 External Reachability"}, { ISIS_TLV_IDRP_INFO, "Inter-Domain Information Type"}, { ISIS_TLV_IPADDR, "IPv4 Interface address(es)"}, { ISIS_TLV_IPAUTH, "IPv4 authentication (deprecated)"}, { ISIS_TLV_TE_ROUTER_ID, "Traffic Engineering Router ID"}, { ISIS_TLV_EXTD_IP_REACH, "Extended IPv4 Reachability"}, { ISIS_TLV_SHARED_RISK_GROUP, "Shared Risk Link Group"}, { ISIS_TLV_MT_PORT_CAP, "Multi-Topology-Aware Port Capability"}, { ISIS_TLV_MT_CAPABILITY, "Multi-Topology Capability"}, { ISIS_TLV_NORTEL_PRIVATE1, "Nortel Proprietary"}, { ISIS_TLV_NORTEL_PRIVATE2, "Nortel Proprietary"}, { ISIS_TLV_HOSTNAME, "Hostname"}, { ISIS_TLV_RESTART_SIGNALING, "Restart Signaling"}, { ISIS_TLV_MT_IS_REACH, "Multi Topology IS Reachability"}, { ISIS_TLV_MT_SUPPORTED, "Multi Topology"}, { ISIS_TLV_IP6ADDR, "IPv6 Interface address(es)"}, { ISIS_TLV_MT_IP_REACH, "Multi-Topology IPv4 Reachability"}, { ISIS_TLV_IP6_REACH, "IPv6 reachability"}, { ISIS_TLV_MT_IP6_REACH, "Multi-Topology IP6 Reachability"}, { ISIS_TLV_PTP_ADJ, "Point-to-point Adjacency State"}, { ISIS_TLV_IIH_SEQNR, "Hello PDU Sequence Number"}, { ISIS_TLV_VENDOR_PRIVATE, "Vendor Private"}, { 0, NULL } }; #define ESIS_OPTION_PROTOCOLS 129 #define ESIS_OPTION_QOS_MAINTENANCE 195 /* iso9542 */ #define ESIS_OPTION_SECURITY 197 /* iso9542 */ #define ESIS_OPTION_ES_CONF_TIME 198 /* iso9542 */ #define ESIS_OPTION_PRIORITY 205 /* iso9542 */ #define ESIS_OPTION_ADDRESS_MASK 225 /* iso9542 */ #define ESIS_OPTION_SNPA_MASK 226 /* iso9542 */ static const struct tok esis_option_values[] = { { ESIS_OPTION_PROTOCOLS, "Protocols supported"}, { ESIS_OPTION_QOS_MAINTENANCE, "QoS Maintenance" }, { ESIS_OPTION_SECURITY, "Security" }, { ESIS_OPTION_ES_CONF_TIME, "ES Configuration Time" }, { ESIS_OPTION_PRIORITY, "Priority" }, { ESIS_OPTION_ADDRESS_MASK, "Addressk Mask" }, { ESIS_OPTION_SNPA_MASK, "SNPA Mask" }, { 0, NULL } }; #define CLNP_OPTION_DISCARD_REASON 193 #define CLNP_OPTION_QOS_MAINTENANCE 195 /* iso8473 */ #define CLNP_OPTION_SECURITY 197 /* iso8473 */ #define CLNP_OPTION_SOURCE_ROUTING 200 /* iso8473 */ #define CLNP_OPTION_ROUTE_RECORDING 203 /* iso8473 */ #define CLNP_OPTION_PADDING 204 /* iso8473 */ #define CLNP_OPTION_PRIORITY 205 /* iso8473 */ static const struct tok clnp_option_values[] = { { CLNP_OPTION_DISCARD_REASON, "Discard Reason"}, { CLNP_OPTION_PRIORITY, "Priority"}, { CLNP_OPTION_QOS_MAINTENANCE, "QoS Maintenance"}, { CLNP_OPTION_SECURITY, "Security"}, { CLNP_OPTION_SOURCE_ROUTING, "Source Routing"}, { CLNP_OPTION_ROUTE_RECORDING, "Route Recording"}, { CLNP_OPTION_PADDING, "Padding"}, { 0, NULL } }; static const struct tok clnp_option_rfd_class_values[] = { { 0x0, "General"}, { 0x8, "Address"}, { 0x9, "Source Routeing"}, { 0xa, "Lifetime"}, { 0xb, "PDU Discarded"}, { 0xc, "Reassembly"}, { 0, NULL } }; static const struct tok clnp_option_rfd_general_values[] = { { 0x0, "Reason not specified"}, { 0x1, "Protocol procedure error"}, { 0x2, "Incorrect checksum"}, { 0x3, "PDU discarded due to congestion"}, { 0x4, "Header syntax error (cannot be parsed)"}, { 0x5, "Segmentation needed but not permitted"}, { 0x6, "Incomplete PDU received"}, { 0x7, "Duplicate option"}, { 0, NULL } }; static const struct tok clnp_option_rfd_address_values[] = { { 0x0, "Destination address unreachable"}, { 0x1, "Destination address unknown"}, { 0, NULL } }; static const struct tok clnp_option_rfd_source_routeing_values[] = { { 0x0, "Unspecified source routeing error"}, { 0x1, "Syntax error in source routeing field"}, { 0x2, "Unknown address in source routeing field"}, { 0x3, "Path not acceptable"}, { 0, NULL } }; static const struct tok clnp_option_rfd_lifetime_values[] = { { 0x0, "Lifetime expired while data unit in transit"}, { 0x1, "Lifetime expired during reassembly"}, { 0, NULL } }; static const struct tok clnp_option_rfd_pdu_discard_values[] = { { 0x0, "Unsupported option not specified"}, { 0x1, "Unsupported protocol version"}, { 0x2, "Unsupported security option"}, { 0x3, "Unsupported source routeing option"}, { 0x4, "Unsupported recording of route option"}, { 0, NULL } }; static const struct tok clnp_option_rfd_reassembly_values[] = { { 0x0, "Reassembly interference"}, { 0, NULL } }; /* array of 16 error-classes */ static const struct tok *clnp_option_rfd_error_class[] = { clnp_option_rfd_general_values, NULL, NULL, NULL, NULL, NULL, NULL, NULL, clnp_option_rfd_address_values, clnp_option_rfd_source_routeing_values, clnp_option_rfd_lifetime_values, clnp_option_rfd_pdu_discard_values, clnp_option_rfd_reassembly_values, NULL, NULL, NULL }; #define CLNP_OPTION_OPTION_QOS_MASK 0x3f #define CLNP_OPTION_SCOPE_MASK 0xc0 #define CLNP_OPTION_SCOPE_SA_SPEC 0x40 #define CLNP_OPTION_SCOPE_DA_SPEC 0x80 #define CLNP_OPTION_SCOPE_GLOBAL 0xc0 static const struct tok clnp_option_scope_values[] = { { CLNP_OPTION_SCOPE_SA_SPEC, "Source Address Specific"}, { CLNP_OPTION_SCOPE_DA_SPEC, "Destination Address Specific"}, { CLNP_OPTION_SCOPE_GLOBAL, "Globally unique"}, { 0, NULL } }; static const struct tok clnp_option_sr_rr_values[] = { { 0x0, "partial"}, { 0x1, "complete"}, { 0, NULL } }; static const struct tok clnp_option_sr_rr_string_values[] = { { CLNP_OPTION_SOURCE_ROUTING, "source routing"}, { CLNP_OPTION_ROUTE_RECORDING, "recording of route in progress"}, { 0, NULL } }; static const struct tok clnp_option_qos_global_values[] = { { 0x20, "reserved"}, { 0x10, "sequencing vs. delay"}, { 0x08, "congested"}, { 0x04, "delay vs. cost"}, { 0x02, "error vs. delay"}, { 0x01, "error vs. cost"}, { 0, NULL } }; #define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* draft-ietf-isis-traffic-05 */ #define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* rfc4205 */ #define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* draft-ietf-isis-traffic-05 */ #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* draft-ietf-isis-traffic-05 */ #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* draft-ietf-isis-traffic-05 */ #define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* draft-ietf-isis-traffic-05 */ #define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* draft-ietf-isis-traffic-05 */ #define ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 /* rfc4124 */ #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD 12 /* draft-ietf-tewg-diff-te-proto-06 */ #define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* draft-ietf-isis-traffic-05 */ #define ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE 19 /* draft-ietf-isis-link-attr-01 */ #define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* rfc4205 */ #define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* rfc4205 */ #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS 22 /* rfc4124 */ #define ISIS_SUBTLV_SPB_METRIC 29 /* rfc6329 */ static const struct tok isis_ext_is_reach_subtlv_values[] = { { ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP, "Administrative groups" }, { ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" }, { ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID, "Link Remote Identifier" }, { ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR, "IPv4 interface address" }, { ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR, "IPv4 neighbor address" }, { ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW, "Maximum link bandwidth" }, { ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW, "Reservable link bandwidth" }, { ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW, "Unreserved bandwidth" }, { ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC, "Traffic Engineering Metric" }, { ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE, "Link Attribute" }, { ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE, "Link Protection Type" }, { ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR, "Interface Switching Capability" }, { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD, "Bandwidth Constraints (old)" }, { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS, "Bandwidth Constraints" }, { 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=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 > ndo->ndo_snaplen || checksum_offset > ndo->ndo_snaplen || checksum_offset > length) { ND_PRINT((ndo, "(unverified)")); } else { unsigned char *truncated = "trunc"; //printf("\nosi_print_cksum: %p %u %u %u\n", pptr, checksum_offset, length, ndo->ndo_snaplen); //ND_TCHECK2(pptr, checksum_offset+length); calculated_checksum = create_osi_cksum(pptr, checksum_offset, length); if (checksum == calculated_checksum) { ND_PRINT((ndo, " (correct)")); } else { truncated = "incorrect"; //trunc: ND_PRINT((ndo, " (%s should be 0x%04x)", truncated, calculated_checksum)); } } } /* * Local Variables: * c-style: whitesmith * c-basic-offset: 8 * End: */