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Diffstat (limited to 'print-isoclns.c')
| -rw-r--r-- | print-isoclns.c | 3561 |
1 files changed, 3561 insertions, 0 deletions
diff --git a/print-isoclns.c b/print-isoclns.c new file mode 100644 index 0000000..ddd5595 --- /dev/null +++ b/print-isoclns.c @@ -0,0 +1,3561 @@ +/* + * 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@gredler.at) for more + * complete IS-IS & CLNP support. + */ + +/* \summary: ISO CLNS, ESIS, and ISIS printer */ + +/* + * specification: + * + * CLNP: ISO 8473 (respective ITU version is at https://www.itu.int/rec/T-REC-X.233/en/) + * ES-IS: ISO 9542 + * IS-IS: ISO 10589 + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "netdissect-stdinc.h" + +#include <string.h> + +#include "netdissect.h" +#include "addrtoname.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 MAC_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_INSTANCE_ID 7 /* rfc8202 */ +#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_POI 13 /* rfc6232 */ +#define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */ +#define ISIS_TLV_EXT_IS_REACH 22 /* rfc5305 */ +#define ISIS_TLV_IS_ALIAS_ID 24 /* rfc5311 */ +#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_IPADDR 132 /* rfc1195 */ +#define ISIS_TLV_IPAUTH 133 /* rfc1195 */ +#define ISIS_TLV_TE_ROUTER_ID 134 /* rfc5305 */ +#define ISIS_TLV_EXTD_IP_REACH 135 /* rfc5305 */ +#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_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_ROUTER_CAPABILITY 242 /* rfc7981 */ +#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_INSTANCE_ID, "Instance Identifier"}, + { ISIS_TLV_PADDING, "Padding"}, + { ISIS_TLV_LSP, "LSP entries"}, + { ISIS_TLV_AUTH, "Authentication"}, + { ISIS_TLV_CHECKSUM, "Checksum"}, + { ISIS_TLV_POI, "Purge Originator Identifier"}, + { 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_ROUTER_CAPABILITY, "IS-IS Router Capability"}, + { 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 } +}; + +static const struct tok isis_tlv_router_capability_flags[] = { + { 0x01, "S bit"}, + { 0x02, "D bit"}, + { 0, NULL } +}; + +#define ISIS_SUBTLV_ROUTER_CAP_SR 2 /* rfc 8667 */ + +static const struct tok isis_router_capability_subtlv_values[] = { + { ISIS_SUBTLV_ROUTER_CAP_SR, "SR-Capabilities"}, + { 0, NULL } +}; + +static const struct tok isis_router_capability_sr_flags[] = { + { 0x80, "ipv4"}, + { 0x40, "ipv6"}, + { 0, NULL } +}; + +#define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* rfc5305 */ +#define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* rfc4205 */ +#define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* rfc5305 */ +#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* rfc5305 */ +#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* rfc5305 */ +#define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* rfc5305 */ +#define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* rfc5305 */ +#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 /* rfc5305 */ +#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_EXT_IS_REACH_LAN_ADJ_SEGMENT_ID 32 /* rfc8667 */ + +#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_EXT_IS_REACH_LAN_ADJ_SEGMENT_ID, "LAN Adjacency Segment Identifier" }, + { 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_PREFIX_SID 3 /* rfc8667 */ +#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_PREFIX_SID, "Prefix SID" }, + { ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR, "Management Prefix Color" }, + { 0, NULL } +}; + +#define ISIS_PREFIX_SID_FLAG_R 0x80 /* rfc 8667 */ +#define ISIS_PREFIX_SID_FLAG_N 0x40 /* rfc 8667 */ +#define ISIS_PREFIX_SID_FLAG_P 0x20 /* rfc 8667 */ +#define ISIS_PREFIX_SID_FLAG_E 0x10 /* rfc 8667 */ +#define ISIS_PREFIX_SID_FLAG_V 0x08 /* rfc 8667 */ +#define ISIS_PREFIX_SID_FLAG_L 0x04 /* rfc 8667 */ + +static const struct tok prefix_sid_flag_values[] = { + { ISIS_PREFIX_SID_FLAG_R, "Readvertisement"}, + { ISIS_PREFIX_SID_FLAG_N, "Node"}, + { ISIS_PREFIX_SID_FLAG_P, "No-PHP"}, + { ISIS_PREFIX_SID_FLAG_E, "Explicit NULL"}, + { ISIS_PREFIX_SID_FLAG_V, "Value"}, + { ISIS_PREFIX_SID_FLAG_L, "Local"}, + { 0, NULL} +}; + + +/* rfc 8667 */ +static const struct tok prefix_sid_algo_values[] = { + { 0, "SPF"}, + { 1, "strict-SPF"}, + { 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 } +}; + +static const struct tok isis_lan_adj_sid_flag_values[] = { + { 0x80, "Address family IPv6" }, + { 0x40, "Backup" }, + { 0x20, "Value" }, + { 0x10, "Local significance" }, + { 0x08, "Set of adjacencies" }, + { 0x04, "Persistent" }, + { 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 { + nd_uint8_t format_id; + nd_byte name[32]; + nd_uint16_t revision_lvl; + nd_byte digest[16]; +}; + +struct isis_subtlv_spb_mcid { + struct isis_spb_mcid mcid; + struct isis_spb_mcid aux_mcid; +}; + +struct isis_subtlv_spb_instance { + nd_byte cist_root_id[8]; + nd_uint32_t cist_external_root_path_cost; + nd_uint16_t bridge_priority; + nd_uint32_t spsourceid; + nd_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) (GET_U_1(x)&0x4) +#define ISIS_MASK_LSP_ISTYPE_BITS(x) (GET_U_1(x)&0x3) +#define ISIS_MASK_LSP_PARTITION_BIT(x) (GET_U_1(x)&0x80) +#define ISIS_MASK_LSP_ATT_BITS(x) (GET_U_1(x)&0x78) +#define ISIS_MASK_LSP_ATT_ERROR_BIT(x) (GET_U_1(x)&0x40) +#define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) (GET_U_1(x)&0x20) +#define ISIS_MASK_LSP_ATT_DELAY_BIT(x) (GET_U_1(x)&0x10) +#define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) (GET_U_1(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) (GET_U_1(x)&0x80) +#define ISIS_LSP_TLV_METRIC_IE(x) (GET_U_1(x)&0x40) +#define ISIS_LSP_TLV_METRIC_UPDOWN(x) (GET_U_1(x)&0x80) +#define ISIS_LSP_TLV_METRIC_VALUE(x) (GET_U_1(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 { + nd_uint8_t adjacency_state; + nd_uint32_t extd_local_circuit_id; + nd_byte neighbor_sysid[SYSTEM_ID_LEN]; + nd_uint32_t neighbor_extd_local_circuit_id; +}; + +static void osi_print_cksum(netdissect_options *, const uint8_t *pptr, + uint16_t checksum, 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 { + nd_uint8_t metric_default; + nd_uint8_t metric_delay; + nd_uint8_t metric_expense; + nd_uint8_t metric_error; +}; + +struct isis_tlv_is_reach { + struct isis_metric_block isis_metric_block; + nd_byte neighbor_nodeid[NODE_ID_LEN]; +}; + +struct isis_tlv_es_reach { + struct isis_metric_block isis_metric_block; + nd_byte neighbor_sysid[SYSTEM_ID_LEN]; +}; + +struct isis_tlv_ip_reach { + struct isis_metric_block isis_metric_block; + nd_ipv4 prefix; + nd_ipv4 mask; +}; + +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 { + nd_uint8_t nlpid; + nd_uint8_t fixed_len; + nd_uint8_t version; /* Protocol version */ + nd_uint8_t id_length; + nd_uint8_t pdu_type; /* 3 MSbits are reserved */ + nd_uint8_t pdu_version; /* Packet format version */ + nd_byte reserved; + nd_uint8_t max_area; +}; + +struct isis_iih_lan_header { + nd_uint8_t circuit_type; + nd_byte source_id[SYSTEM_ID_LEN]; + nd_uint16_t holding_time; + nd_uint16_t pdu_len; + nd_uint8_t priority; + nd_byte lan_id[NODE_ID_LEN]; +}; + +struct isis_iih_ptp_header { + nd_uint8_t circuit_type; + nd_byte source_id[SYSTEM_ID_LEN]; + nd_uint16_t holding_time; + nd_uint16_t pdu_len; + nd_uint8_t circuit_id; +}; + +struct isis_lsp_header { + nd_uint16_t pdu_len; + nd_uint16_t remaining_lifetime; + nd_byte lsp_id[LSP_ID_LEN]; + nd_uint32_t sequence_number; + nd_uint16_t checksum; + nd_uint8_t typeblock; +}; + +struct isis_csnp_header { + nd_uint16_t pdu_len; + nd_byte source_id[NODE_ID_LEN]; + nd_byte start_lsp_id[LSP_ID_LEN]; + nd_byte end_lsp_id[LSP_ID_LEN]; +}; + +struct isis_psnp_header { + nd_uint16_t pdu_len; + nd_byte source_id[NODE_ID_LEN]; +}; + +struct isis_tlv_lsp { + nd_uint16_t remaining_lifetime; + nd_byte lsp_id[LSP_ID_LEN]; + nd_uint32_t sequence_number; + nd_uint16_t checksum; +}; + +#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 u_char *p, u_int length) +{ + ndo->ndo_protocol = "isoclns"; + + if (ndo->ndo_eflag) + ND_PRINT("OSI NLPID %s (0x%02x): ", + tok2str(nlpid_values, "Unknown", GET_U_1(p)), + GET_U_1(p)); + + switch (GET_U_1(p)) { + + case NLPID_CLNP: + if (!clnp_print(ndo, p, length)) + print_unknown_data(ndo, p, "\n\t", length); + 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", length); + break; + + case NLPID_NULLNS: + ND_PRINT("%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("OSI NLPID 0x%02x unknown", GET_U_1(p)); + ND_PRINT("%slength: %u", ndo->ndo_eflag ? "" : ", ", length); + if (length > 1) + print_unknown_data(ndo, p, "\n\t", length); + 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 { + nd_uint8_t nlpid; + nd_uint8_t length_indicator; + nd_uint8_t version; + nd_uint8_t lifetime; /* units of 500ms */ + nd_uint8_t type; + nd_uint16_t segment_length; + nd_uint16_t cksum; +}; + +struct clnp_segment_header_t { + nd_uint16_t data_unit_id; + nd_uint16_t segment_offset; + nd_uint16_t total_length; +}; + +/* + * 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,li_remaining,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,rfd_error_major,rfd_error_minor; + + ndo->ndo_protocol = "clnp"; + clnp_header = (const struct clnp_header_t *) pptr; + ND_TCHECK_SIZE(clnp_header); + + li = GET_U_1(clnp_header->length_indicator); + li_remaining = li; + optr = pptr; + + if (!ndo->ndo_eflag) + nd_print_protocol_caps(ndo); + + /* + * Sanity checking of the header. + */ + + if (GET_U_1(clnp_header->version) != CLNP_VERSION) { + ND_PRINT("version %u packet not supported", + GET_U_1(clnp_header->version)); + return (0); + } + + if (li > length) { + ND_PRINT(" length indicator(%u) > PDU size (%u)!", li, length); + return (0); + } + + if (li < sizeof(struct clnp_header_t)) { + ND_PRINT(" length indicator %u < min PDU size:", li); + while (pptr < ndo->ndo_snapend) { + ND_PRINT("%02X", GET_U_1(pptr)); + pptr++; + } + return (0); + } + + /* FIXME further header sanity checking */ + + clnp_pdu_type = GET_U_1(clnp_header->type) & CLNP_PDU_TYPE_MASK; + clnp_flags = GET_U_1(clnp_header->type) & CLNP_FLAG_MASK; + + pptr += sizeof(struct clnp_header_t); + li_remaining -= sizeof(struct clnp_header_t); + + if (li_remaining < 1) { + ND_PRINT("li < size of fixed part of CLNP header and addresses"); + return (0); + } + dest_address_length = GET_U_1(pptr); + pptr += 1; + li_remaining -= 1; + if (li_remaining < dest_address_length) { + ND_PRINT("li < size of fixed part of CLNP header and addresses"); + return (0); + } + ND_TCHECK_LEN(pptr, dest_address_length); + dest_address = pptr; + pptr += dest_address_length; + li_remaining -= dest_address_length; + + if (li_remaining < 1) { + ND_PRINT("li < size of fixed part of CLNP header and addresses"); + return (0); + } + source_address_length = GET_U_1(pptr); + pptr += 1; + li_remaining -= 1; + if (li_remaining < source_address_length) { + ND_PRINT("li < size of fixed part of CLNP header and addresses"); + return (0); + } + ND_TCHECK_LEN(pptr, source_address_length); + source_address = pptr; + pptr += source_address_length; + li_remaining -= source_address_length; + + if (ndo->ndo_vflag < 1) { + ND_PRINT("%s%s > %s, %s, length %u", + ndo->ndo_eflag ? "" : ", ", + GET_ISONSAP_STRING(source_address, source_address_length), + GET_ISONSAP_STRING(dest_address, dest_address_length), + tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type), + length); + return (1); + } + ND_PRINT("%slength %u", ndo->ndo_eflag ? "" : ", ", length); + + ND_PRINT("\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), + GET_U_1(clnp_header->length_indicator), + GET_U_1(clnp_header->version), + GET_U_1(clnp_header->lifetime)/2, + (GET_U_1(clnp_header->lifetime)%2)*5, + GET_BE_U_2(clnp_header->segment_length), + GET_BE_U_2(clnp_header->cksum)); + + osi_print_cksum(ndo, optr, GET_BE_U_2(clnp_header->cksum), 7, + GET_U_1(clnp_header->length_indicator)); + + ND_PRINT("\n\tFlags [%s]", + bittok2str(clnp_flag_values, "none", clnp_flags)); + + ND_PRINT("\n\tsource address (length %u): %s\n\tdest address (length %u): %s", + source_address_length, + GET_ISONSAP_STRING(source_address, source_address_length), + dest_address_length, + GET_ISONSAP_STRING(dest_address, dest_address_length)); + + if (clnp_flags & CLNP_SEGMENT_PART) { + if (li_remaining < sizeof(struct clnp_segment_header_t)) { + ND_PRINT("li < size of fixed part of CLNP header, addresses, and segment part"); + return (0); + } + clnp_segment_header = (const struct clnp_segment_header_t *) pptr; + ND_TCHECK_SIZE(clnp_segment_header); + ND_PRINT("\n\tData Unit ID: 0x%04x, Segment Offset: %u, Total PDU Length: %u", + GET_BE_U_2(clnp_segment_header->data_unit_id), + GET_BE_U_2(clnp_segment_header->segment_offset), + GET_BE_U_2(clnp_segment_header->total_length)); + pptr+=sizeof(struct clnp_segment_header_t); + li_remaining-=sizeof(struct clnp_segment_header_t); + } + + /* now walk the options */ + while (li_remaining != 0) { + u_int op, opli; + const uint8_t *tptr; + + if (li_remaining < 2) { + ND_PRINT(", bad opts/li"); + return (0); + } + op = GET_U_1(pptr); + opli = GET_U_1(pptr + 1); + pptr += 2; + li_remaining -= 2; + if (opli > li_remaining) { + ND_PRINT(", opt (%u) too long", op); + return (0); + } + ND_TCHECK_LEN(pptr, opli); + li_remaining -= opli; + tptr = pptr; + tlen = opli; + + ND_PRINT("\n\t %s Option #%u, length %u, value: ", + tok2str(clnp_option_values,"Unknown",op), + op, + opli); + + /* + * We've already checked that the entire option is present + * in the captured packet with the ND_TCHECK_LEN() call. + * Therefore, we don't need to do ND_TCHECK()/ND_TCHECK_LEN() + * checks. + * We do, however, need to check tlen, to make sure we + * don't run past the end of the option. + */ + switch (op) { + + + case CLNP_OPTION_ROUTE_RECORDING: /* those two options share the format */ + case CLNP_OPTION_SOURCE_ROUTING: + if (tlen < 2) { + ND_PRINT(", bad opt len"); + return (0); + } + ND_PRINT("%s %s", + tok2str(clnp_option_sr_rr_values,"Unknown",GET_U_1(tptr)), + tok2str(clnp_option_sr_rr_string_values, "Unknown Option %u", op)); + nsap_offset=GET_U_1(tptr + 1); + if (nsap_offset == 0) { + ND_PRINT(" Bad NSAP offset (0)"); + break; + } + nsap_offset-=1; /* offset to nsap list */ + if (nsap_offset > tlen) { + ND_PRINT(" Bad NSAP offset (past end of option)"); + break; + } + tptr+=nsap_offset; + tlen-=nsap_offset; + while (tlen > 0) { + source_address_length=GET_U_1(tptr); + if (tlen < source_address_length+1) { + ND_PRINT("\n\t NSAP address goes past end of option"); + break; + } + if (source_address_length > 0) { + source_address=(tptr+1); + ND_PRINT("\n\t NSAP address (length %u): %s", + source_address_length, + GET_ISONSAP_STRING(source_address, source_address_length)); + } + tlen-=source_address_length+1; + } + break; + + case CLNP_OPTION_PRIORITY: + if (tlen < 1) { + ND_PRINT(", bad opt len"); + return (0); + } + ND_PRINT("0x%1x", GET_U_1(tptr)&0x0f); + break; + + case CLNP_OPTION_QOS_MAINTENANCE: + if (tlen < 1) { + ND_PRINT(", bad opt len"); + return (0); + } + ND_PRINT("\n\t Format Code: %s", + tok2str(clnp_option_scope_values, "Reserved", GET_U_1(tptr) & CLNP_OPTION_SCOPE_MASK)); + + if ((GET_U_1(tptr)&CLNP_OPTION_SCOPE_MASK) == CLNP_OPTION_SCOPE_GLOBAL) + ND_PRINT("\n\t QoS Flags [%s]", + bittok2str(clnp_option_qos_global_values, + "none", + GET_U_1(tptr)&CLNP_OPTION_OPTION_QOS_MASK)); + break; + + case CLNP_OPTION_SECURITY: + if (tlen < 2) { + ND_PRINT(", bad opt len"); + return (0); + } + ND_PRINT("\n\t Format Code: %s, Security-Level %u", + tok2str(clnp_option_scope_values,"Reserved",GET_U_1(tptr)&CLNP_OPTION_SCOPE_MASK), + GET_U_1(tptr + 1)); + break; + + case CLNP_OPTION_DISCARD_REASON: + if (tlen < 1) { + ND_PRINT(", bad opt len"); + return (0); + } + rfd_error = GET_U_1(tptr); + rfd_error_major = (rfd_error&0xf0) >> 4; + rfd_error_minor = rfd_error&0x0f; + ND_PRINT("\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("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: + if (GET_U_1(pptr) == NLPID_CLNP) { + ND_PRINT("\n\t-----original packet-----\n\t"); + /* FIXME recursion protection */ + clnp_print(ndo, pptr, length - li); + break; + } + + /* The cases above break from the switch block if they see and print + * a CLNP header in the Data part. For an Error Report PDU this is + * described in Section 7.9.6 of ITU X.233 (1997 E), also known as + * ISO/IEC 8473-1:1998(E). It is not clear why in this code the same + * applies to an Echo Response PDU, as the standard does not specify + * the contents -- could be a proprietary extension or a bug. In either + * case, if the Data part does not contain a CLNP header, its structure + * is considered unknown and the decoding falls through to print the + * contents as-is. + */ + ND_FALL_THROUGH; + + case CLNP_PDU_DT: + case CLNP_PDU_MD: + case CLNP_PDU_ERQ: + + default: + /* dump the PDU specific data */ + if (length > ND_BYTES_BETWEEN(pptr, optr)) { + ND_PRINT("\n\t undecoded non-header data, length %u", length-li); + print_unknown_data(ndo, pptr, "\n\t ", length - ND_BYTES_BETWEEN(pptr, optr)); + } + } + + return (1); + + trunc: + nd_print_trunc(ndo); + 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 { + nd_uint8_t nlpid; + nd_uint8_t length_indicator; + nd_uint8_t version; + nd_byte reserved; + nd_uint8_t type; + nd_uint16_t holdtime; + nd_uint16_t cksum; +}; + +static void +esis_print(netdissect_options *ndo, + const uint8_t *pptr, u_int length) +{ + const uint8_t *optr; + u_int li, version, esis_pdu_type, source_address_length, source_address_number; + const struct esis_header_t *esis_header; + + ndo->ndo_protocol = "esis"; + if (!ndo->ndo_eflag) + ND_PRINT("ES-IS"); + + if (length <= 2) { + ND_PRINT(ndo->ndo_qflag ? "bad pkt!" : "no header at all!"); + return; + } + + esis_header = (const struct esis_header_t *) pptr; + ND_TCHECK_SIZE(esis_header); + li = GET_U_1(esis_header->length_indicator); + optr = pptr; + + /* + * Sanity checking of the header. + */ + + if (GET_U_1(esis_header->nlpid) != NLPID_ESIS) { + ND_PRINT(" nlpid 0x%02x packet not supported", + GET_U_1(esis_header->nlpid)); + return; + } + + version = GET_U_1(esis_header->version); + if (version != ESIS_VERSION) { + ND_PRINT(" version %u packet not supported", version); + return; + } + + if (li > length) { + ND_PRINT(" length indicator(%u) > PDU size (%u)!", li, length); + return; + } + + if (li < sizeof(struct esis_header_t) + 2) { + ND_PRINT(" length indicator %u < min PDU size:", li); + while (pptr < ndo->ndo_snapend) { + ND_PRINT("%02X", GET_U_1(pptr)); + pptr++; + } + return; + } + + esis_pdu_type = GET_U_1(esis_header->type) & ESIS_PDU_TYPE_MASK; + + if (ndo->ndo_vflag < 1) { + ND_PRINT("%s%s, length %u", + ndo->ndo_eflag ? "" : ", ", + tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type), + length); + return; + } else + ND_PRINT("%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(", v: %u%s", version, version == ESIS_VERSION ? "" : "unsupported" ); + ND_PRINT(", checksum: 0x%04x", GET_BE_U_2(esis_header->cksum)); + + osi_print_cksum(ndo, pptr, GET_BE_U_2(esis_header->cksum), 7, + li); + + ND_PRINT(", holding time: %us, length indicator: %u", + GET_BE_U_2(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_1(pptr); + if (li < 1) { + ND_PRINT(", bad redirect/li"); + return; + } + dstl = GET_U_1(pptr); + pptr++; + li--; + ND_TCHECK_LEN(pptr, dstl); + if (li < dstl) { + ND_PRINT(", bad redirect/li"); + return; + } + dst = pptr; + pptr += dstl; + li -= dstl; + ND_PRINT("\n\t %s", GET_ISONSAP_STRING(dst, dstl)); + + ND_TCHECK_1(pptr); + if (li < 1) { + ND_PRINT(", bad redirect/li"); + return; + } + snpal = GET_U_1(pptr); + pptr++; + li--; + ND_TCHECK_LEN(pptr, snpal); + if (li < snpal) { + ND_PRINT(", bad redirect/li"); + return; + } + snpa = pptr; + pptr += snpal; + li -= snpal; + ND_TCHECK_1(pptr); + if (li < 1) { + ND_PRINT(", bad redirect/li"); + return; + } + netal = GET_U_1(pptr); + pptr++; + ND_TCHECK_LEN(pptr, netal); + if (li < netal) { + ND_PRINT(", bad redirect/li"); + return; + } + neta = pptr; + pptr += netal; + li -= netal; + + if (snpal == MAC_ADDR_LEN) + ND_PRINT("\n\t SNPA (length: %u): %s", + snpal, + GET_ETHERADDR_STRING(snpa)); + else + ND_PRINT("\n\t SNPA (length: %u): %s", + snpal, + GET_LINKADDR_STRING(snpa, LINKADDR_OTHER, snpal)); + if (netal != 0) + ND_PRINT("\n\t NET (length: %u) %s", + netal, + GET_ISONSAP_STRING(neta, netal)); + break; + } + + case ESIS_PDU_ESH: + ND_TCHECK_1(pptr); + if (li < 1) { + ND_PRINT(", bad esh/li"); + return; + } + source_address_number = GET_U_1(pptr); + pptr++; + li--; + + ND_PRINT("\n\t Number of Source Addresses: %u", source_address_number); + + while (source_address_number > 0) { + ND_TCHECK_1(pptr); + if (li < 1) { + ND_PRINT(", bad esh/li"); + return; + } + source_address_length = GET_U_1(pptr); + pptr++; + li--; + + ND_TCHECK_LEN(pptr, source_address_length); + if (li < source_address_length) { + ND_PRINT(", bad esh/li"); + return; + } + ND_PRINT("\n\t NET (length: %u): %s", + source_address_length, + GET_ISONSAP_STRING(pptr, source_address_length)); + pptr += source_address_length; + li -= source_address_length; + source_address_number--; + } + + break; + + case ESIS_PDU_ISH: { + ND_TCHECK_1(pptr); + if (li < 1) { + ND_PRINT(", bad ish/li"); + return; + } + source_address_length = GET_U_1(pptr); + pptr++; + li--; + ND_TCHECK_LEN(pptr, source_address_length); + if (li < source_address_length) { + ND_PRINT(", bad ish/li"); + return; + } + ND_PRINT("\n\t NET (length: %u): %s", source_address_length, GET_ISONSAP_STRING(pptr, source_address_length)); + pptr += source_address_length; + li -= source_address_length; + break; + } + + default: + if (ndo->ndo_vflag <= 1) { + /* + * If there's at least one byte to print, print + * it/them. + */ + if (ND_TTEST_LEN(pptr, 1)) + print_unknown_data(ndo, pptr, "\n\t ", ND_BYTES_AVAILABLE_AFTER(pptr)); + } + return; + } + + /* now walk the options */ + while (li != 0) { + u_int op, opli; + const uint8_t *tptr; + + if (li < 2) { + ND_PRINT(", bad opts/li"); + return; + } + op = GET_U_1(pptr); + opli = GET_U_1(pptr + 1); + pptr += 2; + li -= 2; + if (opli > li) { + ND_PRINT(", opt (%u) too long", op); + return; + } + li -= opli; + tptr = pptr; + + ND_PRINT("\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_TCHECK_2(pptr); + ND_PRINT("%us", GET_BE_U_2(tptr)); + } else + ND_PRINT("(bad length)"); + break; + + case ESIS_OPTION_PROTOCOLS: + while (opli>0) { + ND_PRINT("%s (0x%02x)", + tok2str(nlpid_values, + "unknown", + GET_U_1(tptr)), + GET_U_1(tptr)); + if (opli>1) /* further NPLIDs ? - put comma */ + ND_PRINT(", "); + 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; + } + return; + +trunc: + nd_print_trunc(ndo); +} + +static void +isis_print_mcid(netdissect_options *ndo, + const struct isis_spb_mcid *mcid) +{ + int i; + + ND_TCHECK_SIZE(mcid); + ND_PRINT("ID: %u, Name: ", GET_U_1(mcid->format_id)); + + nd_printjnp(ndo, mcid->name, sizeof(mcid->name)); + + ND_PRINT("\n\t Lvl: %u", GET_BE_U_2(mcid->revision_lvl)); + + ND_PRINT(", Digest: "); + + for(i=0;i<16;i++) + ND_PRINT("%.2x ", mcid->digest[i]); + return; + +trunc: + nd_print_trunc(ndo); +} + +static int +isis_print_mt_port_cap_subtlv(netdissect_options *ndo, + const uint8_t *tptr, u_int len) +{ + u_int stlv_type, stlv_len; + const struct isis_subtlv_spb_mcid *subtlv_spb_mcid; + int i; + + while (len > 2) + { + stlv_type = GET_U_1(tptr); + stlv_len = GET_U_1(tptr + 1); + + /* first lets see if we know the subTLVs name*/ + ND_PRINT("\n\t %s subTLV #%u, length: %u", + tok2str(isis_mt_port_cap_subtlv_values, "unknown", stlv_type), + stlv_type, + stlv_len); + + tptr += 2; + /*len -= TLV_TYPE_LEN_OFFSET;*/ + len -= 2; + + /* Make sure the subTLV fits within the space left */ + if (len < stlv_len) + goto subtlv_too_long; + /* Make sure the entire subTLV is in the captured data */ + ND_TCHECK_LEN(tptr, stlv_len); + + switch (stlv_type) + { + case ISIS_SUBTLV_SPB_MCID: + { + if (stlv_len < ISIS_SUBTLV_SPB_MCID_MIN_LEN) + goto subtlv_too_short; + + subtlv_spb_mcid = (const struct isis_subtlv_spb_mcid *)tptr; + + ND_PRINT("\n\t MCID: "); + isis_print_mcid(ndo, &(subtlv_spb_mcid->mcid)); + + /*tptr += SPB_MCID_MIN_LEN; + len -= SPB_MCID_MIN_LEN; */ + + ND_PRINT("\n\t AUX-MCID: "); + isis_print_mcid(ndo, &(subtlv_spb_mcid->aux_mcid)); + + /*tptr += SPB_MCID_MIN_LEN; + len -= SPB_MCID_MIN_LEN; */ + tptr += ISIS_SUBTLV_SPB_MCID_MIN_LEN; + len -= ISIS_SUBTLV_SPB_MCID_MIN_LEN; + stlv_len -= ISIS_SUBTLV_SPB_MCID_MIN_LEN; + + break; + } + + case ISIS_SUBTLV_SPB_DIGEST: + { + if (stlv_len < ISIS_SUBTLV_SPB_DIGEST_MIN_LEN) + goto subtlv_too_short; + + ND_PRINT("\n\t RES: %u V: %u A: %u D: %u", + (GET_U_1(tptr) >> 5), + ((GET_U_1(tptr) >> 4) & 0x01), + ((GET_U_1(tptr) >> 2) & 0x03), + (GET_U_1(tptr) & 0x03)); + + tptr++; + + ND_PRINT("\n\t Digest: "); + + for(i=1;i<=8; i++) + { + ND_PRINT("%08x ", GET_BE_U_4(tptr)); + if (i%4 == 0 && i != 8) + ND_PRINT("\n\t "); + tptr += 4; + } + + len -= ISIS_SUBTLV_SPB_DIGEST_MIN_LEN; + stlv_len -= ISIS_SUBTLV_SPB_DIGEST_MIN_LEN; + + break; + } + + case ISIS_SUBTLV_SPB_BVID: + { + while (stlv_len != 0) + { + if (stlv_len < 4) + goto subtlv_too_short; + ND_PRINT("\n\t ECT: %08x", + GET_BE_U_4(tptr)); + + tptr += 4; + len -= 4; + stlv_len -= 4; + + if (stlv_len < 2) + goto subtlv_too_short; + ND_PRINT(" BVID: %u, U:%01x M:%01x ", + (GET_BE_U_2(tptr) >> 4) , + (GET_BE_U_2(tptr) >> 3) & 0x01, + (GET_BE_U_2(tptr) >> 2) & 0x01); + + tptr += 2; + len -= 2; + stlv_len -= 2; + } + + break; + } + + default: + break; + } + tptr += stlv_len; + len -= stlv_len; + } + return (0); + +trunc: + nd_print_trunc(ndo); + return (1); + +subtlv_too_long: + ND_PRINT(" (> containing TLV length)"); + return (1); + +subtlv_too_short: + ND_PRINT(" (too short)"); + return (1); +} + +static int +isis_print_mt_capability_subtlv(netdissect_options *ndo, + const uint8_t *tptr, u_int len) +{ + u_int stlv_type, stlv_len, treecount; + + while (len > 2) + { + stlv_type = GET_U_1(tptr); + stlv_len = GET_U_1(tptr + 1); + tptr += 2; + len -= 2; + + /* first lets see if we know the subTLVs name*/ + ND_PRINT("\n\t %s subTLV #%u, length: %u", + tok2str(isis_mt_capability_subtlv_values, "unknown", stlv_type), + stlv_type, + stlv_len); + + /* Make sure the subTLV fits within the space left */ + if (len < stlv_len) + goto subtlv_too_long; + /* Make sure the entire subTLV is in the captured data */ + ND_TCHECK_LEN(tptr, stlv_len); + + switch (stlv_type) + { + case ISIS_SUBTLV_SPB_INSTANCE: + if (stlv_len < ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN) + goto subtlv_too_short; + + ND_PRINT("\n\t CIST Root-ID: %08x", GET_BE_U_4(tptr)); + tptr += 4; + ND_PRINT(" %08x", GET_BE_U_4(tptr)); + tptr += 4; + ND_PRINT(", Path Cost: %08x", GET_BE_U_4(tptr)); + tptr += 4; + ND_PRINT(", Prio: %u", GET_BE_U_2(tptr)); + tptr += 2; + ND_PRINT("\n\t RES: %u", + GET_BE_U_2(tptr) >> 5); + ND_PRINT(", V: %u", + (GET_BE_U_2(tptr) >> 4) & 0x0001); + ND_PRINT(", SPSource-ID: %u", + (GET_BE_U_4(tptr) & 0x000fffff)); + tptr += 4; + ND_PRINT(", No of Trees: %x", GET_U_1(tptr)); + + treecount = GET_U_1(tptr); + tptr++; + + len -= ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN; + stlv_len -= ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN; + + while (treecount) + { + if (stlv_len < ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN) + goto trunc; + + ND_PRINT("\n\t U:%u, M:%u, A:%u, RES:%u", + GET_U_1(tptr) >> 7, + (GET_U_1(tptr) >> 6) & 0x01, + (GET_U_1(tptr) >> 5) & 0x01, + (GET_U_1(tptr) & 0x1f)); + + tptr++; + + ND_PRINT(", ECT: %08x", GET_BE_U_4(tptr)); + + tptr += 4; + + ND_PRINT(", BVID: %u, SPVID: %u", + (GET_BE_U_3(tptr) >> 12) & 0x000fff, + GET_BE_U_3(tptr) & 0x000fff); + + tptr += 3; + len -= ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN; + stlv_len -= ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN; + treecount--; + } + + break; + + case ISIS_SUBTLV_SPBM_SI: + if (stlv_len < 8) + goto trunc; + + ND_PRINT("\n\t BMAC: %08x", GET_BE_U_4(tptr)); + tptr += 4; + ND_PRINT("%04x", GET_BE_U_2(tptr)); + tptr += 2; + + ND_PRINT(", RES: %u, VID: %u", GET_BE_U_2(tptr) >> 12, + (GET_BE_U_2(tptr)) & 0x0fff); + + tptr += 2; + len -= 8; + stlv_len -= 8; + + while (stlv_len >= 4) { + ND_PRINT("\n\t T: %u, R: %u, RES: %u, ISID: %u", + (GET_BE_U_4(tptr) >> 31), + (GET_BE_U_4(tptr) >> 30) & 0x01, + (GET_BE_U_4(tptr) >> 24) & 0x03f, + (GET_BE_U_4(tptr)) & 0x0ffffff); + + tptr += 4; + len -= 4; + stlv_len -= 4; + } + + break; + + default: + break; + } + tptr += stlv_len; + len -= stlv_len; + } + return (0); + +trunc: + nd_print_trunc(ndo); + return (1); + +subtlv_too_long: + ND_PRINT(" (> containing TLV length)"); + return (1); + +subtlv_too_short: + ND_PRINT(" (too short)"); + return (1); +} + +/* shared routine for printing system, node and lsp-ids */ +static char * +isis_print_id(netdissect_options *ndo, const uint8_t *cp, u_int id_len) +{ + u_int i; + static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")]; + char *pos = id; + u_int sysid_len; + + sysid_len = SYSTEM_ID_LEN; + if (sysid_len > id_len) + sysid_len = id_len; + for (i = 1; i <= sysid_len; i++) { + snprintf(pos, sizeof(id) - (pos - id), "%02x", GET_U_1(cp)); + cp++; + pos += strlen(pos); + if (i == 2 || i == 4) + *pos++ = '.'; + } + if (id_len >= NODE_ID_LEN) { + snprintf(pos, sizeof(id) - (pos - id), ".%02x", GET_U_1(cp)); + cp++; + pos += strlen(pos); + } + if (id_len == LSP_ID_LEN) + snprintf(pos, sizeof(id) - (pos - id), "-%02x", GET_U_1(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(", Default Metric: %u, %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("\n\t\t Delay Metric: %u, %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("\n\t\t Expense Metric: %u, %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("\n\t\t Error Metric: %u, %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, u_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("short IPv4 Reachability (%u vs %zu)", + length, + sizeof(*tlv_ip_reach)); + return (0); + } + + ND_TCHECK_SIZE(tlv_ip_reach); + + prefix_len = mask2plen(GET_IPV4_TO_HOST_ORDER(tlv_ip_reach->mask)); + + if (prefix_len == -1) + ND_PRINT("%sIPv4 prefix: %s mask %s", + ident, + GET_IPADDR_STRING(tlv_ip_reach->prefix), + GET_IPADDR_STRING(tlv_ip_reach->mask)); + else + ND_PRINT("%sIPv4 prefix: %15s/%u", + ident, + GET_IPADDR_STRING(tlv_ip_reach->prefix), + prefix_len); + + ND_PRINT(", 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("%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("%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("%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); +trunc: + return 0; +} + +/* + * 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, u_int subt, u_int subl, + const char *ident) +{ + /* first lets see if we know the subTLVs name*/ + ND_PRINT("%s%s subTLV #%u, length: %u", + ident, tok2str(isis_ext_ip_reach_subtlv_values, "unknown", subt), + subt, subl); + + ND_TCHECK_LEN(tptr, subl); + + 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(", 0x%08x (=%u)", + GET_BE_U_4(tptr), + GET_BE_U_4(tptr)); + tptr+=4; + subl-=4; + } + break; + case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64: + while (subl >= 8) { + ND_PRINT(", 0x%08x%08x", + GET_BE_U_4(tptr), + GET_BE_U_4(tptr + 4)); + tptr+=8; + subl-=8; + } + break; + case ISIS_SUBTLV_EXTD_IP_REACH_PREFIX_SID: + { + uint8_t algo, flags; + uint32_t sid; + + flags = GET_U_1(tptr); + algo = GET_U_1(tptr+1); + + if (flags & ISIS_PREFIX_SID_FLAG_V) { + if (subl < 5) + goto trunc; + sid = GET_BE_U_3(tptr+2); + tptr+=5; + subl-=5; + } else { + if (subl < 6) + goto trunc; + sid = GET_BE_U_4(tptr+2); + tptr+=6; + subl-=6; + } + + ND_PRINT(", Flags [%s], Algo %s (%u), %s %u", + bittok2str(prefix_sid_flag_values, "None", flags), + tok2str(prefix_sid_algo_values, "Unknown", algo), algo, + flags & ISIS_PREFIX_SID_FLAG_V ? "label" : "index", + sid); + } + break; + default: + if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl)) + return(0); + break; + } + return(1); + +trunc: + nd_print_trunc(ndo); + 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, u_int tlv_type, + u_int tlv_remaining) +{ + char ident_buffer[20]; + u_int subtlv_type,subtlv_len,subtlv_sum_len; + int proc_bytes = 0; /* how many bytes did we process ? */ + u_int te_class,priority_level,gmpls_switch_cap; + union { /* int to float conversion buffer for several subTLVs */ + float f; + uint32_t i; + } bw; + + ND_TCHECK_LEN(tptr, NODE_ID_LEN); + if (tlv_remaining < NODE_ID_LEN) + return(0); + + ND_PRINT("%sIS Neighbor: %s", ident, isis_print_id(ndo, tptr, NODE_ID_LEN)); + tptr+=NODE_ID_LEN; + tlv_remaining-=NODE_ID_LEN; + proc_bytes+=NODE_ID_LEN; + + if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */ + ND_TCHECK_3(tptr); + if (tlv_remaining < 3) + return(0); + ND_PRINT(", Metric: %u", GET_BE_U_3(tptr)); + tptr+=3; + tlv_remaining-=3; + proc_bytes+=3; + } + + ND_TCHECK_1(tptr); + if (tlv_remaining < 1) + return(0); + subtlv_sum_len=GET_U_1(tptr); /* read out subTLV length */ + tptr++; + tlv_remaining--; + proc_bytes++; + ND_PRINT(", %ssub-TLVs present",subtlv_sum_len ? "" : "no "); + if (subtlv_sum_len) { + ND_PRINT(" (%u)", subtlv_sum_len); + /* prepend the indent string */ + snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident); + ident = ident_buffer; + while (subtlv_sum_len != 0) { + ND_TCHECK_2(tptr); + if (tlv_remaining < 2) { + ND_PRINT("%sRemaining data in TLV shorter than a subTLV header",ident); + proc_bytes += tlv_remaining; + break; + } + if (subtlv_sum_len < 2) { + ND_PRINT("%sRemaining data in subTLVs shorter than a subTLV header",ident); + proc_bytes += subtlv_sum_len; + break; + } + subtlv_type=GET_U_1(tptr); + subtlv_len=GET_U_1(tptr + 1); + tptr += 2; + tlv_remaining -= 2; + subtlv_sum_len -= 2; + proc_bytes += 2; + ND_PRINT("%s%s subTLV #%u, length: %u", + ident, tok2str(isis_ext_is_reach_subtlv_values, "unknown", subtlv_type), + subtlv_type, subtlv_len); + + if (subtlv_sum_len < subtlv_len) { + ND_PRINT(" (remaining data in subTLVs shorter than the current subTLV)"); + proc_bytes += subtlv_sum_len; + break; + } + + if (tlv_remaining < subtlv_len) { + ND_PRINT(" (> remaining tlv length)"); + proc_bytes += tlv_remaining; + break; + } + + ND_TCHECK_LEN(tptr, subtlv_len); + + switch(subtlv_type) { + 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 (subtlv_len >= 4) { + ND_PRINT(", 0x%08x", GET_BE_U_4(tptr)); + if (subtlv_len == 8) /* rfc4205 */ + ND_PRINT(", 0x%08x", GET_BE_U_4(tptr + 4)); + } + break; + case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR: + case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR: + if (subtlv_len >= sizeof(nd_ipv4)) + ND_PRINT(", %s", GET_IPADDR_STRING(tptr)); + break; + case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW : + case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW: + if (subtlv_len >= 4) { + bw.i = GET_BE_U_4(tptr); + ND_PRINT(", %.3f Mbps", bw.f * 8 / 1000000); + } + break; + case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW : + if (subtlv_len >= 32) { + for (te_class = 0; te_class < 8; te_class++) { + bw.i = GET_BE_U_4(tptr); + ND_PRINT("%s TE-Class %u: %.3f Mbps", + ident, + te_class, + bw.f * 8 / 1000000); + tptr += 4; + subtlv_len -= 4; + subtlv_sum_len -= 4; + proc_bytes += 4; + } + } + break; + case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */ + case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD: + if (subtlv_len == 0) + break; + ND_PRINT("%sBandwidth Constraints Model ID: %s (%u)", + ident, + tok2str(diffserv_te_bc_values, "unknown", GET_U_1(tptr)), + GET_U_1(tptr)); + tptr++; + subtlv_len--; + subtlv_sum_len--; + proc_bytes++; + /* decode BCs until the subTLV ends */ + for (te_class = 0; subtlv_len != 0; te_class++) { + if (subtlv_len < 4) + break; + bw.i = GET_BE_U_4(tptr); + ND_PRINT("%s Bandwidth constraint CT%u: %.3f Mbps", + ident, + te_class, + bw.f * 8 / 1000000); + tptr += 4; + subtlv_len -= 4; + subtlv_sum_len -= 4; + proc_bytes += 4; + } + break; + case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC: + if (subtlv_len >= 3) + ND_PRINT(", %u", GET_BE_U_3(tptr)); + break; + case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE: + if (subtlv_len == 2) { + ND_PRINT(", [ %s ] (0x%04x)", + bittok2str(isis_subtlv_link_attribute_values, + "Unknown", + GET_BE_U_2(tptr)), + GET_BE_U_2(tptr)); + } + break; + case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE: + if (subtlv_len >= 2) { + ND_PRINT(", %s, Priority %u", + bittok2str(gmpls_link_prot_values, "none", GET_U_1(tptr)), + GET_U_1(tptr + 1)); + } + break; + case ISIS_SUBTLV_SPB_METRIC: + if (subtlv_len >= 6) { + ND_PRINT(", LM: %u", GET_BE_U_3(tptr)); + tptr += 3; + subtlv_len -= 3; + subtlv_sum_len -= 3; + proc_bytes += 3; + ND_PRINT(", P: %u", GET_U_1(tptr)); + tptr++; + subtlv_len--; + subtlv_sum_len--; + proc_bytes++; + ND_PRINT(", P-ID: %u", GET_BE_U_2(tptr)); + } + break; + case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR: + if (subtlv_len >= 36) { + gmpls_switch_cap = GET_U_1(tptr); + ND_PRINT("%s Interface Switching Capability:%s", + ident, + tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap)); + ND_PRINT(", LSP Encoding: %s", + tok2str(gmpls_encoding_values, "Unknown", GET_U_1((tptr + 1)))); + tptr += 4; + subtlv_len -= 4; + subtlv_sum_len -= 4; + proc_bytes += 4; + ND_PRINT("%s Max LSP Bandwidth:", ident); + for (priority_level = 0; priority_level < 8; priority_level++) { + bw.i = GET_BE_U_4(tptr); + ND_PRINT("%s priority level %u: %.3f Mbps", + ident, + priority_level, + bw.f * 8 / 1000000); + tptr += 4; + subtlv_len -= 4; + subtlv_sum_len -= 4; + proc_bytes += 4; + } + switch (gmpls_switch_cap) { + case GMPLS_PSC1: + case GMPLS_PSC2: + case GMPLS_PSC3: + case GMPLS_PSC4: + if (subtlv_len < 6) + break; + bw.i = GET_BE_U_4(tptr); + ND_PRINT("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000); + ND_PRINT("%s Interface MTU: %u", ident, + GET_BE_U_2(tptr + 4)); + break; + case GMPLS_TSC: + if (subtlv_len < 8) + break; + bw.i = GET_BE_U_4(tptr); + ND_PRINT("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000); + ND_PRINT("%s Indication %s", ident, + tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", GET_U_1((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 (subtlv_len != 0) { + if (!print_unknown_data(ndo, tptr, "\n\t\t ", subtlv_len)) + return(0); + } + } + } + break; + case ISIS_SUBTLV_EXT_IS_REACH_LAN_ADJ_SEGMENT_ID: + if (subtlv_len >= 8) { + ND_PRINT("%s Flags: [%s]", ident, + bittok2str(isis_lan_adj_sid_flag_values, + "none", + GET_U_1(tptr))); + int vflag = (GET_U_1(tptr) & 0x20) ? 1:0; + int lflag = (GET_U_1(tptr) & 0x10) ? 1:0; + tptr++; + subtlv_len--; + subtlv_sum_len--; + proc_bytes++; + ND_PRINT("%s Weight: %u", ident, GET_U_1(tptr)); + tptr++; + subtlv_len--; + subtlv_sum_len--; + proc_bytes++; + if(subtlv_len>=SYSTEM_ID_LEN) { + ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN); + ND_PRINT("%s Neighbor System-ID: %s", ident, + isis_print_id(ndo, tptr, SYSTEM_ID_LEN)); + } + /* RFC 8667 section 2.2.2 */ + /* if V-flag is set to 1 and L-flag is set to 1 ==> 3 octet label */ + /* if V-flag is set to 0 and L-flag is set to 0 ==> 4 octet index */ + if (vflag && lflag) { + ND_PRINT("%s Label: %u", + ident, GET_BE_U_3(tptr+SYSTEM_ID_LEN)); + } else if ((!vflag) && (!lflag)) { + ND_PRINT("%s Index: %u", + ident, GET_BE_U_4(tptr+SYSTEM_ID_LEN)); + } else + nd_print_invalid(ndo); + } + break; + default: + if (!print_unknown_data(ndo, tptr, "\n\t\t ", subtlv_len)) + return(0); + break; + } + + tptr += subtlv_len; + tlv_remaining -= subtlv_len; + subtlv_sum_len -= subtlv_len; + proc_bytes += subtlv_len; + } + } + return(proc_bytes); + +trunc: + return(0); +} + +/* + * this is the common Multi Topology ID decoder + * it is called from various MT-TLVs (222,229,235,237) + */ + +static uint8_t +isis_print_mtid(netdissect_options *ndo, + const uint8_t *tptr, const char *ident, u_int tlv_remaining) +{ + if (tlv_remaining < 2) + goto trunc; + + ND_PRINT("%s%s", + ident, + tok2str(isis_mt_values, + "Reserved for IETF Consensus", + ISIS_MASK_MTID(GET_BE_U_2(tptr)))); + + ND_PRINT(" Topology (0x%03x), Flags: [%s]", + ISIS_MASK_MTID(GET_BE_U_2(tptr)), + bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(GET_BE_U_2(tptr)))); + + return(2); +trunc: + return 0; +} + +/* + * 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 u_int +isis_print_extd_ip_reach(netdissect_options *ndo, + const uint8_t *tptr, const char *ident, uint16_t afi) +{ + char ident_buffer[20]; + uint8_t prefix[sizeof(nd_ipv6)]; /* shared copy buffer for IPv4 and IPv6 prefixes */ + u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen; + + metric = GET_BE_U_4(tptr); + processed=4; + tptr+=4; + + if (afi == AF_INET) { + status_byte=GET_U_1(tptr); + tptr++; + bit_length = status_byte&0x3f; + if (bit_length > 32) { + ND_PRINT("%sIPv4 prefix: bad bit length %u", + ident, + bit_length); + return (0); + } + processed++; + } else if (afi == AF_INET6) { + status_byte=GET_U_1(tptr); + bit_length=GET_U_1(tptr + 1); + if (bit_length > 128) { + ND_PRINT("%sIPv6 prefix: bad bit length %u", + ident, + bit_length); + return (0); + } + tptr+=2; + processed+=2; + } else + return (0); /* somebody is fooling us */ + + byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */ + + memset(prefix, 0, sizeof(prefix)); /* clear the copy buffer */ + GET_CPY_BYTES(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("%sIPv4 prefix: %15s/%u", + ident, + ipaddr_string(ndo, prefix), /* local buffer, not packet data; don't use GET_IPADDR_STRING() */ + bit_length); + else if (afi == AF_INET6) + ND_PRINT("%sIPv6 prefix: %s/%u", + ident, + ip6addr_string(ndo, prefix), /* local buffer, not packet data; don't use GET_IP6ADDR_STRING() */ + bit_length); + + ND_PRINT(", 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(", sub-TLVs present"); + else if (afi == AF_INET6) + ND_PRINT(", %s%s", + ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal", + ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : ""); + + if ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte)) + || (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte)) + ) { + /* 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 + */ + sublen=GET_U_1(tptr); + tptr++; + processed+=sublen+1; + ND_PRINT(" (%u)", sublen); /* print out subTLV length */ + + while (sublen>0) { + subtlvtype=GET_U_1(tptr); + subtlvlen=GET_U_1(tptr + 1); + tptr+=2; + /* prepend the indent 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); +} + +static void +isis_print_router_cap_subtlv(netdissect_options *ndo, const uint8_t *tptr, uint8_t tlen) +{ + uint8_t subt, subl; + + while (tlen >= 2) { + subt = GET_U_1(tptr); + subl = GET_U_1(tptr+1); + tlen -= 2; + tptr += 2; + + /* first lets see if we know the subTLVs name*/ + ND_PRINT("\n\t\t%s subTLV #%u, length: %u", + tok2str(isis_router_capability_subtlv_values, "unknown", subt), + subt, subl); + + /* + * Boundary check. + */ + if (subl > tlen) { + break; + } + ND_TCHECK_LEN(tptr, subl); + + switch (subt) { + case ISIS_SUBTLV_ROUTER_CAP_SR: + { + uint8_t flags, sid_tlen, sid_type, sid_len; + uint32_t range; + const uint8_t *sid_ptr; + + flags = GET_U_1(tptr); + range = GET_BE_U_3(tptr+1); + ND_PRINT(", Flags [%s], Range %u", + bittok2str(isis_router_capability_sr_flags, "None", flags), + range); + sid_ptr = tptr + 4; + sid_tlen = subl - 4; + + while (sid_tlen >= 5) { + sid_type = GET_U_1(sid_ptr); + sid_len = GET_U_1(sid_ptr+1); + sid_tlen -= 2; + sid_ptr += 2; + + /* + * Boundary check. + */ + if (sid_len > sid_tlen) { + break; + } + + switch (sid_type) { + case 1: + if (sid_len == 3) { + ND_PRINT(", SID value %u", GET_BE_U_3(sid_ptr)); + } else if (sid_len == 4) { + ND_PRINT(", SID value %u", GET_BE_U_4(sid_ptr)); + } else { + ND_PRINT(", Unknown SID length%u", sid_len); + } + break; + default: + print_unknown_data(ndo, sid_ptr, "\n\t\t ", sid_len); + } + + sid_ptr += sid_len; + sid_tlen -= sid_len; + } + } + break; + default: + print_unknown_data(ndo, tptr, "\n\t\t", subl); + break; + } + + tlen -= subl; + tptr += subl; + } + trunc: + return; +} + +/* + * Clear checksum and lifetime prior to signature verification. + */ +static void +isis_clear_checksum_lifetime(void *header) +{ + struct isis_lsp_header *header_lsp = (struct isis_lsp_header *) header; + + header_lsp->checksum[0] = 0; + header_lsp->checksum[1] = 0; + header_lsp->remaining_lifetime[0] = 0; + header_lsp->remaining_lifetime[1] = 0; +} + +/* + * isis_print + * Decode IS-IS packets. Return 0 on error. + */ + +#define INVALID_OR_DECREMENT(length,decr) \ + if ((length) < (decr)) { \ + ND_PRINT(" [packet length %u < %zu]", (length), (decr)); \ + nd_print_invalid(ndo); \ + return 1; \ + } \ + length -= (decr); + +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; + const struct isis_lsp_header *header_lsp; + const struct isis_csnp_header *header_csnp; + const struct isis_psnp_header *header_psnp; + + const struct isis_tlv_lsp *tlv_lsp; + const struct isis_tlv_ptp_adj *tlv_ptp_adj; + const struct isis_tlv_is_reach *tlv_is_reach; + const struct isis_tlv_es_reach *tlv_es_reach; + + uint8_t version, pdu_version, fixed_len; + uint8_t pdu_type, pdu_max_area, max_area, pdu_id_length, id_length, tlv_type, tlv_len, tlen, alen, prefix_len; + u_int ext_is_len, ext_ip_len; + uint8_t mt_len; + uint8_t isis_subtlv_idrp; + const uint8_t *optr, *pptr, *tptr; + u_int packet_len; + u_short pdu_len, key_id; + u_int i,vendor_id, num_vals; + uint8_t auth_type; + uint8_t num_system_ids; + int sigcheck; + + ndo->ndo_protocol = "isis"; + 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_SIZE(isis_header); + if (length < ISIS_COMMON_HEADER_SIZE) + goto trunc; + pptr = p+(ISIS_COMMON_HEADER_SIZE); + header_iih_lan = (const struct isis_iih_lan_header *)pptr; + header_iih_ptp = (const struct isis_iih_ptp_header *)pptr; + header_lsp = (const struct isis_lsp_header *)pptr; + header_csnp = (const struct isis_csnp_header *)pptr; + header_psnp = (const struct isis_psnp_header *)pptr; + + if (!ndo->ndo_eflag) + ND_PRINT("IS-IS"); + + /* + * Sanity checking of the header. + */ + + version = GET_U_1(isis_header->version); + if (version != ISIS_VERSION) { + ND_PRINT("version %u packet not supported", version); + return (0); + } + + pdu_id_length = GET_U_1(isis_header->id_length); + if ((pdu_id_length != SYSTEM_ID_LEN) && (pdu_id_length != 0)) { + ND_PRINT("system ID length of %u is not supported", + pdu_id_length); + return (0); + } + + pdu_version = GET_U_1(isis_header->pdu_version); + if (pdu_version != ISIS_VERSION) { + ND_PRINT("version %u packet not supported", pdu_version); + return (0); + } + + fixed_len = GET_U_1(isis_header->fixed_len); + if (length < fixed_len) { + ND_PRINT("fixed header length %u > packet length %u", fixed_len, length); + return (0); + } + + if (fixed_len < ISIS_COMMON_HEADER_SIZE) { + ND_PRINT("fixed header length %u < minimum header size %u", fixed_len, (u_int)ISIS_COMMON_HEADER_SIZE); + return (0); + } + + pdu_max_area = GET_U_1(isis_header->max_area); + switch(pdu_max_area) { + case 0: + max_area = 3; /* silly shit */ + break; + case 255: + ND_PRINT("bad packet -- 255 areas"); + return (0); + default: + max_area = pdu_max_area; + break; + } + + switch(pdu_id_length) { + case 0: + id_length = 6; /* silly shit again */ + break; + case 1: /* 1-8 are valid sys-ID lengths */ + case 2: + case 3: + case 4: + case 5: + case 6: + case 7: + case 8: + id_length = pdu_id_length; + break; + case 255: + id_length = 0; /* entirely useless */ + break; + default: + id_length = pdu_id_length; + break; + } + + /* toss any non 6-byte sys-ID len PDUs */ + if (id_length != 6 ) { + ND_PRINT("bad packet -- illegal sys-ID length (%u)", id_length); + return (0); + } + + pdu_type = GET_U_1(isis_header->pdu_type); + + /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/ + if (ndo->ndo_vflag == 0) { + ND_PRINT("%s%s", + ndo->ndo_eflag ? "" : ", ", + tok2str(isis_pdu_values, "unknown PDU-Type %u", pdu_type)); + } else { + /* ok they seem to want to know everything - lets fully decode it */ + ND_PRINT("%slength %u", ndo->ndo_eflag ? "" : ", ", length); + + ND_PRINT("\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), + fixed_len, + version, + pdu_version, + id_length, + pdu_id_length, + max_area, + pdu_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 (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) { + ND_PRINT(", bogus fixed header length %u should be %zu", + fixed_len, ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE); + return (0); + } + ND_TCHECK_SIZE(header_iih_lan); + if (length < ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE) + goto trunc; + if (ndo->ndo_vflag == 0) { + ND_PRINT(", src-id %s", + isis_print_id(ndo, header_iih_lan->source_id, SYSTEM_ID_LEN)); + ND_PRINT(", lan-id %s, prio %u", + isis_print_id(ndo, header_iih_lan->lan_id,NODE_ID_LEN), + GET_U_1(header_iih_lan->priority)); + ND_PRINT(", length %u", length); + return (1); + } + pdu_len=GET_BE_U_2(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_PRINT("\n\t source-id: %s, holding time: %us, Flags: [%s]", + isis_print_id(ndo, header_iih_lan->source_id,SYSTEM_ID_LEN), + GET_BE_U_2(header_iih_lan->holding_time), + tok2str(isis_iih_circuit_type_values, + "unknown circuit type 0x%02x", + GET_U_1(header_iih_lan->circuit_type))); + + ND_PRINT("\n\t lan-id: %s, Priority: %u, PDU length: %u", + isis_print_id(ndo, header_iih_lan->lan_id, NODE_ID_LEN), + GET_U_1(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); + } + + INVALID_OR_DECREMENT(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 (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) { + ND_PRINT(", bogus fixed header length %u should be %zu", + fixed_len, ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE); + return (0); + } + ND_TCHECK_SIZE(header_iih_ptp); + if (length < ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE) + goto trunc; + if (ndo->ndo_vflag == 0) { + ND_PRINT(", src-id %s", isis_print_id(ndo, header_iih_ptp->source_id, SYSTEM_ID_LEN)); + ND_PRINT(", length %u", length); + return (1); + } + pdu_len=GET_BE_U_2(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_PRINT("\n\t source-id: %s, holding time: %us, Flags: [%s]", + isis_print_id(ndo, header_iih_ptp->source_id,SYSTEM_ID_LEN), + GET_BE_U_2(header_iih_ptp->holding_time), + tok2str(isis_iih_circuit_type_values, + "unknown circuit type 0x%02x", + GET_U_1(header_iih_ptp->circuit_type))); + + ND_PRINT("\n\t circuit-id: 0x%02x, PDU length: %u", + GET_U_1(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); + } + INVALID_OR_DECREMENT(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 (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) { + ND_PRINT(", bogus fixed header length %u should be %zu", + fixed_len, ISIS_LSP_HEADER_SIZE); + return (0); + } + ND_TCHECK_SIZE(header_lsp); + if (length < ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE) + goto trunc; + if (ndo->ndo_vflag == 0) { + ND_PRINT(", lsp-id %s, seq 0x%08x, lifetime %5us", + isis_print_id(ndo, header_lsp->lsp_id, LSP_ID_LEN), + GET_BE_U_4(header_lsp->sequence_number), + GET_BE_U_2(header_lsp->remaining_lifetime)); + ND_PRINT(", length %u", length); + return (1); + } + pdu_len=GET_BE_U_2(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_PRINT("\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x", + isis_print_id(ndo, header_lsp->lsp_id, LSP_ID_LEN), + GET_BE_U_4(header_lsp->sequence_number), + GET_BE_U_2(header_lsp->remaining_lifetime), + GET_BE_U_2(header_lsp->checksum)); + + osi_print_cksum(ndo, (const uint8_t *)header_lsp->lsp_id, + GET_BE_U_2(header_lsp->checksum), + 12, length-12); + + ND_PRINT(", 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("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : ""); + ND_PRINT("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : ""); + ND_PRINT("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : ""); + ND_PRINT("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : ""); + ND_PRINT("ATT bit set, "); + } + ND_PRINT("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : ""); + ND_PRINT("%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); + } + + INVALID_OR_DECREMENT(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 (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) { + ND_PRINT(", bogus fixed header length %u should be %zu", + fixed_len, ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE); + return (0); + } + ND_TCHECK_SIZE(header_csnp); + if (length < ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE) + goto trunc; + if (ndo->ndo_vflag == 0) { + ND_PRINT(", src-id %s", isis_print_id(ndo, header_csnp->source_id, NODE_ID_LEN)); + ND_PRINT(", length %u", length); + return (1); + } + pdu_len=GET_BE_U_2(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_PRINT("\n\t source-id: %s, PDU length: %u", + isis_print_id(ndo, header_csnp->source_id, NODE_ID_LEN), + pdu_len); + ND_PRINT("\n\t start lsp-id: %s", + isis_print_id(ndo, header_csnp->start_lsp_id, LSP_ID_LEN)); + ND_PRINT("\n\t end lsp-id: %s", + isis_print_id(ndo, 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); + } + + INVALID_OR_DECREMENT(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 (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) { + ND_PRINT("- bogus fixed header length %u should be %zu", + fixed_len, ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE); + return (0); + } + ND_TCHECK_SIZE(header_psnp); + if (length < ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE) + goto trunc; + if (ndo->ndo_vflag == 0) { + ND_PRINT(", src-id %s", isis_print_id(ndo, header_psnp->source_id, NODE_ID_LEN)); + ND_PRINT(", length %u", length); + return (1); + } + pdu_len=GET_BE_U_2(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_PRINT("\n\t source-id: %s, PDU length: %u", + isis_print_id(ndo, 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); + } + + INVALID_OR_DECREMENT(packet_len,ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE); + pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE); + break; + + default: + if (ndo->ndo_vflag == 0) { + ND_PRINT(", length %u", length); + return (1); + } + (void)print_unknown_data(ndo, pptr, "\n\t ", length); + return (0); + } + + /* + * Now print the TLV's. + */ + + while (packet_len > 0) { + ND_TCHECK_2(pptr); + if (packet_len < 2) + goto trunc; + tlv_type = GET_U_1(pptr); + tlv_len = GET_U_1(pptr + 1); + pptr += 2; + packet_len -= 2; + tlen = tlv_len; /* copy temporary len & pointer to packet data */ + tptr = pptr; + + /* first lets see if we know the TLVs name*/ + ND_PRINT("\n\t %s TLV #%u, length: %u", + tok2str(isis_tlv_values, + "unknown", + tlv_type), + tlv_type, + tlv_len); + + if (packet_len < tlv_len) + goto trunc; + + /* now check if we have a decoder otherwise do a hexdump at the end*/ + switch (tlv_type) { + case ISIS_TLV_AREA_ADDR: + while (tlen != 0) { + alen = GET_U_1(tptr); + tptr++; + tlen--; + if (tlen < alen) + goto tlv_trunc; + ND_PRINT("\n\t Area address (length: %u): %s", + alen, + GET_ISONSAP_STRING(tptr, alen)); + tptr += alen; + tlen -= alen; + } + break; + case ISIS_TLV_ISNEIGH: + while (tlen != 0) { + if (tlen < MAC_ADDR_LEN) + goto tlv_trunc; + ND_TCHECK_LEN(tptr, MAC_ADDR_LEN); + ND_PRINT("\n\t SNPA: %s", isis_print_id(ndo, tptr, MAC_ADDR_LEN)); + tlen -= MAC_ADDR_LEN; + tptr += MAC_ADDR_LEN; + } + break; + + case ISIS_TLV_INSTANCE_ID: + if (tlen < 4) + goto tlv_trunc; + num_vals = (tlen-2)/2; + ND_PRINT("\n\t Instance ID: %u, ITIDs(%u)%s ", + GET_BE_U_2(tptr), num_vals, + num_vals ? ":" : ""); + tptr += 2; + tlen -= 2; + for (i=0; i < num_vals; i++) { + ND_PRINT("%u", GET_BE_U_2(tptr)); + if (i < (num_vals - 1)) { + ND_PRINT(", "); + } + tptr += 2; + tlen -= 2; + } + break; + + case ISIS_TLV_PADDING: + break; + + case ISIS_TLV_MT_IS_REACH: + mt_len = isis_print_mtid(ndo, tptr, "\n\t ", tlen); + if (mt_len == 0) /* did something go wrong ? */ + goto trunc; + tptr+=mt_len; + tlen-=mt_len; + while (tlen != 0) { + ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tlen); + if (ext_is_len == 0) /* did something go wrong ? */ + goto trunc; + if (tlen < ext_is_len) { + ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_is_len); + nd_print_invalid(ndo); + break; + } + tlen-=(uint8_t)ext_is_len; + tptr+=(uint8_t)ext_is_len; + } + break; + + case ISIS_TLV_IS_ALIAS_ID: + while (tlen != 0) { + ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tlen); + if (ext_is_len == 0) /* did something go wrong ? */ + goto trunc; + if (tlen < ext_is_len) { + ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_is_len); + nd_print_invalid(ndo); + break; + } + tlen-=(uint8_t)ext_is_len; + tptr+=(uint8_t)ext_is_len; + } + break; + + case ISIS_TLV_EXT_IS_REACH: + while (tlen != 0) { + ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tlen); + if (ext_is_len == 0) /* did something go wrong ? */ + goto trunc; + if (tlen < ext_is_len) { + ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_is_len); + nd_print_invalid(ndo); + break; + } + tlen-=(uint8_t)ext_is_len; + tptr+=(uint8_t)ext_is_len; + } + break; + case ISIS_TLV_IS_REACH: + if (tlen < 1) + goto tlv_trunc; + ND_PRINT("\n\t %s", + tok2str(isis_is_reach_virtual_values, + "bogus virtual flag 0x%02x", + GET_U_1(tptr))); + tptr++; + tlen--; + tlv_is_reach = (const struct isis_tlv_is_reach *)tptr; + while (tlen != 0) { + if (tlen < sizeof(struct isis_tlv_is_reach)) + goto tlv_trunc; + ND_TCHECK_SIZE(tlv_is_reach); + ND_PRINT("\n\t IS Neighbor: %s", + isis_print_id(ndo, tlv_is_reach->neighbor_nodeid, NODE_ID_LEN)); + isis_print_metric_block(ndo, &tlv_is_reach->isis_metric_block); + tlen -= 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 (tlen != 0) { + if (tlen < sizeof(struct isis_tlv_es_reach)) + goto tlv_trunc; + ND_TCHECK_SIZE(tlv_es_reach); + ND_PRINT("\n\t ES Neighbor: %s", + isis_print_id(ndo, tlv_es_reach->neighbor_sysid, SYSTEM_ID_LEN)); + isis_print_metric_block(ndo, &tlv_es_reach->isis_metric_block); + tlen -= 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 (tlen != 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 trunc; + if (tlen < ext_ip_len) { + ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_ip_len); + nd_print_invalid(ndo); + break; + } + tlen-=(uint8_t)ext_ip_len; + tptr+=(uint8_t)ext_ip_len; + } + break; + + case ISIS_TLV_MT_IP_REACH: + mt_len = isis_print_mtid(ndo, tptr, "\n\t ", tlen); + if (mt_len == 0) { /* did something go wrong ? */ + goto trunc; + } + tptr+=mt_len; + tlen-=mt_len; + + while (tlen != 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 trunc; + if (tlen < ext_ip_len) { + ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_ip_len); + nd_print_invalid(ndo); + break; + } + tlen-=(uint8_t)ext_ip_len; + tptr+=(uint8_t)ext_ip_len; + } + break; + + case ISIS_TLV_IP6_REACH: + while (tlen != 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 trunc; + if (tlen < ext_ip_len) { + ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_ip_len); + nd_print_invalid(ndo); + break; + } + tlen-=(uint8_t)ext_ip_len; + tptr+=(uint8_t)ext_ip_len; + } + break; + + case ISIS_TLV_MT_IP6_REACH: + mt_len = isis_print_mtid(ndo, tptr, "\n\t ", tlen); + if (mt_len == 0) { /* did something go wrong ? */ + goto trunc; + } + tptr+=mt_len; + tlen-=mt_len; + + while (tlen != 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 trunc; + if (tlen < ext_ip_len) { + ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_ip_len); + nd_print_invalid(ndo); + break; + } + tlen-=(uint8_t)ext_ip_len; + tptr+=(uint8_t)ext_ip_len; + } + break; + + case ISIS_TLV_IP6ADDR: + while (tlen != 0) { + if (tlen < sizeof(nd_ipv6)) + goto tlv_trunc; + ND_PRINT("\n\t IPv6 interface address: %s", + GET_IP6ADDR_STRING(tptr)); + + tptr += sizeof(nd_ipv6); + tlen -= sizeof(nd_ipv6); + } + break; + case ISIS_TLV_AUTH: + if (tlen < 1) + goto tlv_trunc; + auth_type = GET_U_1(tptr); + tptr++; + tlen--; + + ND_PRINT("\n\t %s: ", + tok2str(isis_subtlv_auth_values, + "unknown Authentication type 0x%02x", + auth_type)); + + switch (auth_type) { + case ISIS_SUBTLV_AUTH_SIMPLE: + nd_printjnp(ndo, tptr, tlen); + break; + case ISIS_SUBTLV_AUTH_MD5: + for(i=0;i<tlen;i++) { + ND_PRINT("%02x", GET_U_1(tptr + i)); + } + if (tlen != ISIS_SUBTLV_AUTH_MD5_LEN) + ND_PRINT(", (invalid subTLV) "); + + sigcheck = signature_verify(ndo, optr, length, tptr, + isis_clear_checksum_lifetime, + header_lsp); + ND_PRINT(" (%s)", tok2str(signature_check_values, "Unknown", sigcheck)); + + break; + case ISIS_SUBTLV_AUTH_GENERIC: + if (tlen < 2) + goto tlv_trunc; + key_id = GET_BE_U_2(tptr); + ND_PRINT("%u, password: ", key_id); + tptr += 2; + tlen -= 2; + for(i=0;i<tlen;i++) { + ND_PRINT("%02x", GET_U_1(tptr + i)); + } + break; + case ISIS_SUBTLV_AUTH_PRIVATE: + default: + if (!print_unknown_data(ndo, tptr, "\n\t\t ", tlen)) + return(0); + break; + } + break; + + case ISIS_TLV_PTP_ADJ: + tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr; + if(tlen>=1) { + ND_PRINT("\n\t Adjacency State: %s (%u)", + tok2str(isis_ptp_adjancey_values, "unknown", GET_U_1(tptr)), + GET_U_1(tptr)); + tlen--; + } + if(tlen>sizeof(tlv_ptp_adj->extd_local_circuit_id)) { + ND_PRINT("\n\t Extended Local circuit-ID: 0x%08x", + GET_BE_U_4(tlv_ptp_adj->extd_local_circuit_id)); + tlen-=sizeof(tlv_ptp_adj->extd_local_circuit_id); + } + if(tlen>=SYSTEM_ID_LEN) { + ND_TCHECK_LEN(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN); + ND_PRINT("\n\t Neighbor System-ID: %s", + isis_print_id(ndo, tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN)); + tlen-=SYSTEM_ID_LEN; + } + if(tlen>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) { + ND_PRINT("\n\t Neighbor Extended Local circuit-ID: 0x%08x", + GET_BE_U_4(tlv_ptp_adj->neighbor_extd_local_circuit_id)); + } + break; + + case ISIS_TLV_PROTOCOLS: + ND_PRINT("\n\t NLPID(s): "); + while (tlen != 0) { + ND_PRINT("%s (0x%02x)", + tok2str(nlpid_values, + "unknown", + GET_U_1(tptr)), + GET_U_1(tptr)); + if (tlen>1) /* further NPLIDs ? - put comma */ + ND_PRINT(", "); + tptr++; + tlen--; + } + break; + + case ISIS_TLV_MT_PORT_CAP: + { + if (tlen < 2) + goto tlv_trunc; + + ND_PRINT("\n\t RES: %u, MTID(s): %u", + (GET_BE_U_2(tptr) >> 12), + (GET_BE_U_2(tptr) & 0x0fff)); + + tptr += 2; + tlen -= 2; + + if (tlen) + isis_print_mt_port_cap_subtlv(ndo, tptr, tlen); + + break; + } + + case ISIS_TLV_MT_CAPABILITY: + if (tlen < 2) + goto tlv_trunc; + + ND_PRINT("\n\t O: %u, RES: %u, MTID(s): %u", + (GET_BE_U_2(tptr) >> 15) & 0x01, + (GET_BE_U_2(tptr) >> 12) & 0x07, + GET_BE_U_2(tptr) & 0x0fff); + + tptr += 2; + tlen -= 2; + + if (tlen) + isis_print_mt_capability_subtlv(ndo, tptr, tlen); + + break; + + case ISIS_TLV_TE_ROUTER_ID: + if (tlen < sizeof(nd_ipv4)) + goto tlv_trunc; + ND_PRINT("\n\t Traffic Engineering Router ID: %s", GET_IPADDR_STRING(pptr)); + break; + + case ISIS_TLV_IPADDR: + while (tlen != 0) { + if (tlen < sizeof(nd_ipv4)) + goto tlv_trunc; + ND_PRINT("\n\t IPv4 interface address: %s", GET_IPADDR_STRING(tptr)); + tptr += sizeof(nd_ipv4); + tlen -= sizeof(nd_ipv4); + } + break; + + case ISIS_TLV_HOSTNAME: + ND_PRINT("\n\t Hostname: "); + nd_printjnp(ndo, tptr, tlen); + break; + + case ISIS_TLV_SHARED_RISK_GROUP: + if (tlen < NODE_ID_LEN) + break; + ND_TCHECK_LEN(tptr, NODE_ID_LEN); + ND_PRINT("\n\t IS Neighbor: %s", isis_print_id(ndo, tptr, NODE_ID_LEN)); + tptr+=NODE_ID_LEN; + tlen-=NODE_ID_LEN; + + if (tlen < 1) + break; + ND_PRINT(", Flags: [%s]", + ISIS_MASK_TLV_SHARED_RISK_GROUP(GET_U_1(tptr)) ? "numbered" : "unnumbered"); + tptr++; + tlen--; + + if (tlen < sizeof(nd_ipv4)) + break; + ND_PRINT("\n\t IPv4 interface address: %s", GET_IPADDR_STRING(tptr)); + tptr+=sizeof(nd_ipv4); + tlen-=sizeof(nd_ipv4); + + if (tlen < sizeof(nd_ipv4)) + break; + ND_PRINT("\n\t IPv4 neighbor address: %s", GET_IPADDR_STRING(tptr)); + tptr+=sizeof(nd_ipv4); + tlen-=sizeof(nd_ipv4); + + while (tlen != 0) { + if (tlen < 4) + goto tlv_trunc; + ND_PRINT("\n\t Link-ID: 0x%08x", GET_BE_U_4(tptr)); + tptr+=4; + tlen-=4; + } + break; + + case ISIS_TLV_LSP: + tlv_lsp = (const struct isis_tlv_lsp *)tptr; + while (tlen != 0) { + if (tlen < sizeof(struct isis_tlv_lsp)) + goto tlv_trunc; + ND_TCHECK_1(tlv_lsp->lsp_id + LSP_ID_LEN - 1); + ND_PRINT("\n\t lsp-id: %s", + isis_print_id(ndo, tlv_lsp->lsp_id, LSP_ID_LEN)); + ND_PRINT(", seq: 0x%08x", + GET_BE_U_4(tlv_lsp->sequence_number)); + ND_PRINT(", lifetime: %5ds", + GET_BE_U_2(tlv_lsp->remaining_lifetime)); + ND_PRINT(", chksum: 0x%04x", GET_BE_U_2(tlv_lsp->checksum)); + tlen-=sizeof(struct isis_tlv_lsp); + tlv_lsp++; + } + break; + + case ISIS_TLV_CHECKSUM: + if (tlen < ISIS_TLV_CHECKSUM_MINLEN) + break; + ND_TCHECK_LEN(tptr, ISIS_TLV_CHECKSUM_MINLEN); + ND_PRINT("\n\t checksum: 0x%04x ", GET_BE_U_2(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, GET_BE_U_2(tptr), (int)(tptr-optr), + length); + break; + + case ISIS_TLV_POI: + if (tlen < 1) + goto tlv_trunc; + num_system_ids = GET_U_1(tptr); + tptr++; + tlen--; + if (num_system_ids == 0) { + /* Not valid */ + ND_PRINT(" No system IDs supplied"); + } else { + if (tlen < SYSTEM_ID_LEN) + goto tlv_trunc; + ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN); + ND_PRINT("\n\t Purge Originator System-ID: %s", + isis_print_id(ndo, tptr, SYSTEM_ID_LEN)); + tptr += SYSTEM_ID_LEN; + tlen -= SYSTEM_ID_LEN; + + if (num_system_ids > 1) { + if (tlen < SYSTEM_ID_LEN) + goto tlv_trunc; + ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN); + ND_TCHECK_LEN(tptr, 2 * SYSTEM_ID_LEN + 1); + ND_PRINT("\n\t Received from System-ID: %s", + isis_print_id(ndo, tptr, SYSTEM_ID_LEN)); + } + } + break; + + case ISIS_TLV_MT_SUPPORTED: + while (tlen != 0) { + /* length can only be a multiple of 2, otherwise there is + something broken -> so decode down until length is 1 */ + if (tlen!=1) { + mt_len = isis_print_mtid(ndo, tptr, "\n\t ", tlen); + if (mt_len == 0) /* did something go wrong ? */ + goto trunc; + tptr+=mt_len; + tlen-=mt_len; + } else { + ND_PRINT("\n\t invalid MT-ID"); + break; + } + } + break; + + case ISIS_TLV_RESTART_SIGNALING: + /* first attempt to decode the flags */ + if (tlen < ISIS_TLV_RESTART_SIGNALING_FLAGLEN) + break; + ND_TCHECK_LEN(tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN); + ND_PRINT("\n\t Flags [%s]", + bittok2str(isis_restart_flag_values, "none", GET_U_1(tptr))); + tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN; + tlen-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN; + + /* is there anything other than the flags field? */ + if (tlen == 0) + break; + + if (tlen < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN) + break; + ND_TCHECK_LEN(tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN); + + ND_PRINT(", Remaining holding time %us", GET_BE_U_2(tptr)); + tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN; + tlen-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN; + + /* is there an additional sysid field present ?*/ + if (tlen == SYSTEM_ID_LEN) { + ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN); + ND_PRINT(", for %s", isis_print_id(ndo, tptr,SYSTEM_ID_LEN)); + } + break; + + case ISIS_TLV_IDRP_INFO: + if (tlen < 1) + break; + isis_subtlv_idrp = GET_U_1(tptr); + ND_PRINT("\n\t Inter-Domain Information Type: %s", + tok2str(isis_subtlv_idrp_values, + "Unknown (0x%02x)", + isis_subtlv_idrp)); + tptr++; + tlen--; + switch (isis_subtlv_idrp) { + case ISIS_SUBTLV_IDRP_ASN: + if (tlen < 2) + goto tlv_trunc; + ND_PRINT("AS Number: %u", GET_BE_U_2(tptr)); + break; + case ISIS_SUBTLV_IDRP_LOCAL: + case ISIS_SUBTLV_IDRP_RES: + default: + if (!print_unknown_data(ndo, tptr, "\n\t ", tlen)) + return(0); + break; + } + break; + + case ISIS_TLV_LSP_BUFFERSIZE: + if (tlen < 2) + break; + ND_PRINT("\n\t LSP Buffersize: %u", GET_BE_U_2(tptr)); + break; + + case ISIS_TLV_PART_DIS: + while (tlen != 0) { + if (tlen < SYSTEM_ID_LEN) + goto tlv_trunc; + ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN); + ND_PRINT("\n\t %s", isis_print_id(ndo, tptr, SYSTEM_ID_LEN)); + tptr+=SYSTEM_ID_LEN; + tlen-=SYSTEM_ID_LEN; + } + break; + + case ISIS_TLV_PREFIX_NEIGH: + if (tlen < sizeof(struct isis_metric_block)) + break; + ND_TCHECK_LEN(tptr, sizeof(struct isis_metric_block)); + ND_PRINT("\n\t Metric Block"); + isis_print_metric_block(ndo, (const struct isis_metric_block *)tptr); + tptr+=sizeof(struct isis_metric_block); + tlen-=sizeof(struct isis_metric_block); + + while (tlen != 0) { + prefix_len=GET_U_1(tptr); /* read out prefix length in semioctets*/ + tptr++; + tlen--; + if (prefix_len < 2) { + ND_PRINT("\n\t\tAddress: prefix length %u < 2", prefix_len); + break; + } + if (tlen < prefix_len/2) + break; + ND_PRINT("\n\t\tAddress: %s/%u", + GET_ISONSAP_STRING(tptr, prefix_len / 2), prefix_len * 4); + tptr+=prefix_len/2; + tlen-=prefix_len/2; + } + break; + + case ISIS_TLV_IIH_SEQNR: + if (tlen < 4) + break; + ND_PRINT("\n\t Sequence number: %u", GET_BE_U_4(tptr)); + break; + + case ISIS_TLV_ROUTER_CAPABILITY: + if (tlen < 5) { + ND_PRINT(" [object length %u < 5]", tlen); + nd_print_invalid(ndo); + break; + } + ND_PRINT("\n\t Router-ID %s", GET_IPADDR_STRING(tptr)); + ND_PRINT(", Flags [%s]", + bittok2str(isis_tlv_router_capability_flags, "none", GET_U_1(tptr+4))); + + /* Optional set of sub-TLV */ + if (tlen > 5) { + isis_print_router_cap_subtlv(ndo, tptr+5, tlen-5); + } + break; + + case ISIS_TLV_VENDOR_PRIVATE: + if (tlen < 3) + break; + vendor_id = GET_BE_U_3(tptr); + ND_PRINT("\n\t Vendor: %s (%u)", + tok2str(oui_values, "Unknown", vendor_id), + vendor_id); + tptr+=3; + tlen-=3; + if (tlen != 0) /* hexdump the rest */ + if (!print_unknown_data(ndo, tptr, "\n\t\t", tlen)) + 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; + } +tlv_trunc: + /* 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("\n\t %u straggler bytes", packet_len); + } + return (1); + +trunc: + nd_print_trunc(ndo); + return (1); +} + +static void +osi_print_cksum(netdissect_options *ndo, const uint8_t *pptr, + uint16_t checksum, int checksum_offset, u_int length) +{ + uint16_t calculated_checksum; + + /* do not attempt to verify the checksum if it is zero, + * if the offset is nonsense, + * or the base pointer is not sane + */ + if (!checksum + || checksum_offset < 0 + || !ND_TTEST_2(pptr + checksum_offset) + || (u_int)checksum_offset > length + || !ND_TTEST_LEN(pptr, length)) { + ND_PRINT(" (unverified)"); + } else { +#if 0 + ND_PRINT("\nosi_print_cksum: %p %d %u\n", pptr, checksum_offset, length); +#endif + calculated_checksum = create_osi_cksum(pptr, checksum_offset, length); + if (checksum == calculated_checksum) { + ND_PRINT(" (correct)"); + } else { + ND_PRINT(" (incorrect should be 0x%04x)", calculated_checksum); + } + } +} |