| /* |
| * Copyright (c) 1992, 1993, 1994, 1995, 1996 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that: (1) source code distributions |
| * retain the above copyright notice and this paragraph in its entirety, (2) |
| * distributions including binary code include the above copyright notice and |
| * this paragraph in its entirety in the documentation or other materials |
| * provided with the distribution, and (3) all advertising materials mentioning |
| * features or use of this software display the following acknowledgement: |
| * ``This product includes software developed by the University of California, |
| * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of |
| * the University nor the names of its contributors may be used to endorse |
| * or promote products derived from this software without specific prior |
| * written permission. |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| * |
| * Original code by Matt Thomas, Digital Equipment Corporation |
| * |
| * Extensively modified by Hannes Gredler (hannes@juniper.net) for more |
| * complete IS-IS & CLNP support. |
| */ |
| |
| #ifndef lint |
| static const char rcsid[] _U_ = |
| "@(#) $Header: /tcpdump/master/tcpdump/print-isoclns.c,v 1.165 2008-08-16 13:38:15 hannes Exp $ (LBL)"; |
| #endif |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <tcpdump-stdinc.h> |
| |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include "interface.h" |
| #include "addrtoname.h" |
| #include "ethertype.h" |
| #include "ether.h" |
| #include "nlpid.h" |
| #include "extract.h" |
| #include "gmpls.h" |
| #include "oui.h" |
| #include "signature.h" |
| |
| /* |
| * IS-IS is defined in ISO 10589. Look there for protocol definitions. |
| */ |
| |
| #define SYSTEM_ID_LEN ETHER_ADDR_LEN |
| #define NODE_ID_LEN SYSTEM_ID_LEN+1 |
| #define LSP_ID_LEN SYSTEM_ID_LEN+2 |
| |
| #define ISIS_VERSION 1 |
| #define ESIS_VERSION 1 |
| #define CLNP_VERSION 1 |
| |
| #define ISIS_PDU_TYPE_MASK 0x1F |
| #define ESIS_PDU_TYPE_MASK 0x1F |
| #define CLNP_PDU_TYPE_MASK 0x1F |
| #define CLNP_FLAG_MASK 0xE0 |
| #define ISIS_LAN_PRIORITY_MASK 0x7F |
| |
| #define ISIS_PDU_L1_LAN_IIH 15 |
| #define ISIS_PDU_L2_LAN_IIH 16 |
| #define ISIS_PDU_PTP_IIH 17 |
| #define ISIS_PDU_L1_LSP 18 |
| #define ISIS_PDU_L2_LSP 20 |
| #define ISIS_PDU_L1_CSNP 24 |
| #define ISIS_PDU_L2_CSNP 25 |
| #define ISIS_PDU_L1_PSNP 26 |
| #define ISIS_PDU_L2_PSNP 27 |
| |
| static struct tok isis_pdu_values[] = { |
| { ISIS_PDU_L1_LAN_IIH, "L1 Lan IIH"}, |
| { ISIS_PDU_L2_LAN_IIH, "L2 Lan IIH"}, |
| { ISIS_PDU_PTP_IIH, "p2p IIH"}, |
| { ISIS_PDU_L1_LSP, "L1 LSP"}, |
| { ISIS_PDU_L2_LSP, "L2 LSP"}, |
| { ISIS_PDU_L1_CSNP, "L1 CSNP"}, |
| { ISIS_PDU_L2_CSNP, "L2 CSNP"}, |
| { ISIS_PDU_L1_PSNP, "L1 PSNP"}, |
| { ISIS_PDU_L2_PSNP, "L2 PSNP"}, |
| { 0, NULL} |
| }; |
| |
| /* |
| * A TLV is a tuple of a type, length and a value and is normally used for |
| * encoding information in all sorts of places. This is an enumeration of |
| * the well known types. |
| * |
| * list taken from rfc3359 plus some memory from veterans ;-) |
| */ |
| |
| #define ISIS_TLV_AREA_ADDR 1 /* iso10589 */ |
| #define ISIS_TLV_IS_REACH 2 /* iso10589 */ |
| #define ISIS_TLV_ESNEIGH 3 /* iso10589 */ |
| #define ISIS_TLV_PART_DIS 4 /* iso10589 */ |
| #define ISIS_TLV_PREFIX_NEIGH 5 /* iso10589 */ |
| #define ISIS_TLV_ISNEIGH 6 /* iso10589 */ |
| #define ISIS_TLV_ISNEIGH_VARLEN 7 /* iso10589 */ |
| #define ISIS_TLV_PADDING 8 /* iso10589 */ |
| #define ISIS_TLV_LSP 9 /* iso10589 */ |
| #define ISIS_TLV_AUTH 10 /* iso10589, rfc3567 */ |
| #define ISIS_TLV_CHECKSUM 12 /* rfc3358 */ |
| #define ISIS_TLV_CHECKSUM_MINLEN 2 |
| #define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */ |
| #define ISIS_TLV_LSP_BUFFERSIZE_MINLEN 2 |
| #define ISIS_TLV_EXT_IS_REACH 22 /* draft-ietf-isis-traffic-05 */ |
| #define ISIS_TLV_IS_ALIAS_ID 24 /* draft-ietf-isis-ext-lsp-frags-02 */ |
| #define ISIS_TLV_DECNET_PHASE4 42 |
| #define ISIS_TLV_LUCENT_PRIVATE 66 |
| #define ISIS_TLV_INT_IP_REACH 128 /* rfc1195, rfc2966 */ |
| #define ISIS_TLV_PROTOCOLS 129 /* rfc1195 */ |
| #define ISIS_TLV_EXT_IP_REACH 130 /* rfc1195, rfc2966 */ |
| #define ISIS_TLV_IDRP_INFO 131 /* rfc1195 */ |
| #define ISIS_TLV_IDRP_INFO_MINLEN 1 |
| #define ISIS_TLV_IPADDR 132 /* rfc1195 */ |
| #define ISIS_TLV_IPAUTH 133 /* rfc1195 */ |
| #define ISIS_TLV_TE_ROUTER_ID 134 /* draft-ietf-isis-traffic-05 */ |
| #define ISIS_TLV_EXTD_IP_REACH 135 /* draft-ietf-isis-traffic-05 */ |
| #define ISIS_TLV_HOSTNAME 137 /* rfc2763 */ |
| #define ISIS_TLV_SHARED_RISK_GROUP 138 /* draft-ietf-isis-gmpls-extensions */ |
| #define ISIS_TLV_NORTEL_PRIVATE1 176 |
| #define ISIS_TLV_NORTEL_PRIVATE2 177 |
| #define ISIS_TLV_RESTART_SIGNALING 211 /* rfc3847 */ |
| #define ISIS_TLV_RESTART_SIGNALING_FLAGLEN 1 |
| #define ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN 2 |
| #define ISIS_TLV_MT_IS_REACH 222 /* draft-ietf-isis-wg-multi-topology-05 */ |
| #define ISIS_TLV_MT_SUPPORTED 229 /* draft-ietf-isis-wg-multi-topology-05 */ |
| #define ISIS_TLV_MT_SUPPORTED_MINLEN 2 |
| #define ISIS_TLV_IP6ADDR 232 /* draft-ietf-isis-ipv6-02 */ |
| #define ISIS_TLV_MT_IP_REACH 235 /* draft-ietf-isis-wg-multi-topology-05 */ |
| #define ISIS_TLV_IP6_REACH 236 /* draft-ietf-isis-ipv6-02 */ |
| #define ISIS_TLV_MT_IP6_REACH 237 /* draft-ietf-isis-wg-multi-topology-05 */ |
| #define ISIS_TLV_PTP_ADJ 240 /* rfc3373 */ |
| #define ISIS_TLV_IIH_SEQNR 241 /* draft-shen-isis-iih-sequence-00 */ |
| #define ISIS_TLV_IIH_SEQNR_MINLEN 4 |
| #define ISIS_TLV_VENDOR_PRIVATE 250 /* draft-ietf-isis-experimental-tlv-01 */ |
| #define ISIS_TLV_VENDOR_PRIVATE_MINLEN 3 |
| |
| static struct tok isis_tlv_values[] = { |
| { ISIS_TLV_AREA_ADDR, "Area address(es)"}, |
| { ISIS_TLV_IS_REACH, "IS Reachability"}, |
| { ISIS_TLV_ESNEIGH, "ES Neighbor(s)"}, |
| { ISIS_TLV_PART_DIS, "Partition DIS"}, |
| { ISIS_TLV_PREFIX_NEIGH, "Prefix Neighbors"}, |
| { ISIS_TLV_ISNEIGH, "IS Neighbor(s)"}, |
| { ISIS_TLV_ISNEIGH_VARLEN, "IS Neighbor(s) (variable length)"}, |
| { ISIS_TLV_PADDING, "Padding"}, |
| { ISIS_TLV_LSP, "LSP entries"}, |
| { ISIS_TLV_AUTH, "Authentication"}, |
| { ISIS_TLV_CHECKSUM, "Checksum"}, |
| { ISIS_TLV_LSP_BUFFERSIZE, "LSP Buffersize"}, |
| { ISIS_TLV_EXT_IS_REACH, "Extended IS Reachability"}, |
| { ISIS_TLV_IS_ALIAS_ID, "IS Alias ID"}, |
| { ISIS_TLV_DECNET_PHASE4, "DECnet Phase IV"}, |
| { ISIS_TLV_LUCENT_PRIVATE, "Lucent Proprietary"}, |
| { ISIS_TLV_INT_IP_REACH, "IPv4 Internal Reachability"}, |
| { ISIS_TLV_PROTOCOLS, "Protocols supported"}, |
| { ISIS_TLV_EXT_IP_REACH, "IPv4 External Reachability"}, |
| { ISIS_TLV_IDRP_INFO, "Inter-Domain Information Type"}, |
| { ISIS_TLV_IPADDR, "IPv4 Interface address(es)"}, |
| { ISIS_TLV_IPAUTH, "IPv4 authentication (deprecated)"}, |
| { ISIS_TLV_TE_ROUTER_ID, "Traffic Engineering Router ID"}, |
| { ISIS_TLV_EXTD_IP_REACH, "Extended IPv4 Reachability"}, |
| { ISIS_TLV_SHARED_RISK_GROUP, "Shared Risk Link Group"}, |
| { ISIS_TLV_NORTEL_PRIVATE1, "Nortel Proprietary"}, |
| { ISIS_TLV_NORTEL_PRIVATE2, "Nortel Proprietary"}, |
| { ISIS_TLV_HOSTNAME, "Hostname"}, |
| { ISIS_TLV_RESTART_SIGNALING, "Restart Signaling"}, |
| { ISIS_TLV_MT_IS_REACH, "Multi Topology IS Reachability"}, |
| { ISIS_TLV_MT_SUPPORTED, "Multi Topology"}, |
| { ISIS_TLV_IP6ADDR, "IPv6 Interface address(es)"}, |
| { ISIS_TLV_MT_IP_REACH, "Multi-Topology IPv4 Reachability"}, |
| { ISIS_TLV_IP6_REACH, "IPv6 reachability"}, |
| { ISIS_TLV_MT_IP6_REACH, "Multi-Topology IP6 Reachability"}, |
| { ISIS_TLV_PTP_ADJ, "Point-to-point Adjacency State"}, |
| { ISIS_TLV_IIH_SEQNR, "Hello PDU Sequence Number"}, |
| { ISIS_TLV_VENDOR_PRIVATE, "Vendor Private"}, |
| { 0, NULL } |
| }; |
| |
| #define ESIS_OPTION_PROTOCOLS 129 |
| #define ESIS_OPTION_QOS_MAINTENANCE 195 /* iso9542 */ |
| #define ESIS_OPTION_SECURITY 197 /* iso9542 */ |
| #define ESIS_OPTION_ES_CONF_TIME 198 /* iso9542 */ |
| #define ESIS_OPTION_PRIORITY 205 /* iso9542 */ |
| #define ESIS_OPTION_ADDRESS_MASK 225 /* iso9542 */ |
| #define ESIS_OPTION_SNPA_MASK 226 /* iso9542 */ |
| |
| static 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 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 struct tok clnp_option_rfd_class_values[] = { |
| { 0x0, "General"}, |
| { 0x8, "Address"}, |
| { 0x9, "Source Routeing"}, |
| { 0xa, "Lifetime"}, |
| { 0xb, "PDU Discarded"}, |
| { 0xc, "Reassembly"}, |
| { 0, NULL } |
| }; |
| |
| static 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 struct tok clnp_option_rfd_address_values[] = { |
| { 0x0, "Destination address unreachable"}, |
| { 0x1, "Destination address unknown"}, |
| { 0, NULL } |
| }; |
| |
| static 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 struct tok clnp_option_rfd_lifetime_values[] = { |
| { 0x0, "Lifetime expired while data unit in transit"}, |
| { 0x1, "Lifetime expired during reassembly"}, |
| { 0, NULL } |
| }; |
| |
| static 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 struct tok clnp_option_rfd_reassembly_values[] = { |
| { 0x0, "Reassembly interference"}, |
| { 0, NULL } |
| }; |
| |
| /* array of 16 error-classes */ |
| static 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 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 struct tok clnp_option_sr_rr_values[] = { |
| { 0x0, "partial"}, |
| { 0x1, "complete"}, |
| { 0, NULL } |
| }; |
| |
| static 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 struct tok clnp_option_qos_global_values[] = { |
| { 0x20, "reserved"}, |
| { 0x10, "sequencing vs. delay"}, |
| { 0x08, "congested"}, |
| { 0x04, "delay vs. cost"}, |
| { 0x02, "error vs. delay"}, |
| { 0x01, "error vs. cost"}, |
| { 0, NULL } |
| }; |
| |
| #define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* draft-ietf-isis-traffic-05 */ |
| #define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* rfc4205 */ |
| #define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* draft-ietf-isis-traffic-05 */ |
| #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* draft-ietf-isis-traffic-05 */ |
| #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* draft-ietf-isis-traffic-05 */ |
| #define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* draft-ietf-isis-traffic-05 */ |
| #define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* draft-ietf-isis-traffic-05 */ |
| #define ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 /* rfc4124 */ |
| #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD 12 /* draft-ietf-tewg-diff-te-proto-06 */ |
| #define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* draft-ietf-isis-traffic-05 */ |
| #define ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE 19 /* draft-ietf-isis-link-attr-01 */ |
| #define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* rfc4205 */ |
| #define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* rfc4205 */ |
| #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS 22 /* rfc4124 */ |
| |
| static 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" }, |
| { 250, "Reserved for cisco specific extensions" }, |
| { 251, "Reserved for cisco specific extensions" }, |
| { 252, "Reserved for cisco specific extensions" }, |
| { 253, "Reserved for cisco specific extensions" }, |
| { 254, "Reserved for cisco specific extensions" }, |
| { 255, "Reserved for future expansion" }, |
| { 0, NULL } |
| }; |
| |
| #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32 1 /* draft-ietf-isis-admin-tags-01 */ |
| #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64 2 /* draft-ietf-isis-admin-tags-01 */ |
| #define ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR 117 /* draft-ietf-isis-wg-multi-topology-05 */ |
| |
| static struct tok isis_ext_ip_reach_subtlv_values[] = { |
| { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32, "32-Bit Administrative tag" }, |
| { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64, "64-Bit Administrative tag" }, |
| { ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR, "Management Prefix Color" }, |
| { 0, NULL } |
| }; |
| |
| static struct tok isis_subtlv_link_attribute_values[] = { |
| { 0x01, "Local Protection Available" }, |
| { 0x02, "Link excluded from local protection path" }, |
| { 0x04, "Local maintenance required"}, |
| { 0, NULL } |
| }; |
| |
| #define ISIS_SUBTLV_AUTH_SIMPLE 1 |
| #define ISIS_SUBTLV_AUTH_GENERIC 3 /* rfc 5310 */ |
| #define ISIS_SUBTLV_AUTH_MD5 54 |
| #define ISIS_SUBTLV_AUTH_MD5_LEN 16 |
| #define ISIS_SUBTLV_AUTH_PRIVATE 255 |
| |
| static 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 struct tok isis_subtlv_idrp_values[] = { |
| { ISIS_SUBTLV_IDRP_RES, "Reserved"}, |
| { ISIS_SUBTLV_IDRP_LOCAL, "Routing-Domain Specific"}, |
| { ISIS_SUBTLV_IDRP_ASN, "AS Number Tag"}, |
| { 0, NULL} |
| }; |
| |
| #define CLNP_SEGMENT_PART 0x80 |
| #define CLNP_MORE_SEGMENTS 0x40 |
| #define CLNP_REQUEST_ER 0x20 |
| |
| static struct tok clnp_flag_values[] = { |
| { CLNP_SEGMENT_PART, "Segmentation permitted"}, |
| { CLNP_MORE_SEGMENTS, "more Segments"}, |
| { CLNP_REQUEST_ER, "request Error Report"}, |
| { 0, NULL} |
| }; |
| |
| #define ISIS_MASK_LSP_OL_BIT(x) ((x)&0x4) |
| #define ISIS_MASK_LSP_ISTYPE_BITS(x) ((x)&0x3) |
| #define ISIS_MASK_LSP_PARTITION_BIT(x) ((x)&0x80) |
| #define ISIS_MASK_LSP_ATT_BITS(x) ((x)&0x78) |
| #define ISIS_MASK_LSP_ATT_ERROR_BIT(x) ((x)&0x40) |
| #define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) ((x)&0x20) |
| #define ISIS_MASK_LSP_ATT_DELAY_BIT(x) ((x)&0x10) |
| #define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) ((x)&0x8) |
| |
| #define ISIS_MASK_MTID(x) ((x)&0x0fff) |
| #define ISIS_MASK_MTFLAGS(x) ((x)&0xf000) |
| |
| static struct tok isis_mt_flag_values[] = { |
| { 0x4000, "ATT bit set"}, |
| { 0x8000, "Overload bit set"}, |
| { 0, NULL} |
| }; |
| |
| #define ISIS_MASK_TLV_EXTD_IP_UPDOWN(x) ((x)&0x80) |
| #define ISIS_MASK_TLV_EXTD_IP_SUBTLV(x) ((x)&0x40) |
| |
| #define ISIS_MASK_TLV_EXTD_IP6_IE(x) ((x)&0x40) |
| #define ISIS_MASK_TLV_EXTD_IP6_SUBTLV(x) ((x)&0x20) |
| |
| #define ISIS_LSP_TLV_METRIC_SUPPORTED(x) ((x)&0x80) |
| #define ISIS_LSP_TLV_METRIC_IE(x) ((x)&0x40) |
| #define ISIS_LSP_TLV_METRIC_UPDOWN(x) ((x)&0x80) |
| #define ISIS_LSP_TLV_METRIC_VALUE(x) ((x)&0x3f) |
| |
| #define ISIS_MASK_TLV_SHARED_RISK_GROUP(x) ((x)&0x1) |
| |
| static struct tok isis_mt_values[] = { |
| { 0, "IPv4 unicast"}, |
| { 1, "In-Band Management"}, |
| { 2, "IPv6 unicast"}, |
| { 3, "Multicast"}, |
| { 4095, "Development, Experimental or Proprietary"}, |
| { 0, NULL } |
| }; |
| |
| static struct tok isis_iih_circuit_type_values[] = { |
| { 1, "Level 1 only"}, |
| { 2, "Level 2 only"}, |
| { 3, "Level 1, Level 2"}, |
| { 0, NULL} |
| }; |
| |
| #define ISIS_LSP_TYPE_UNUSED0 0 |
| #define ISIS_LSP_TYPE_LEVEL_1 1 |
| #define ISIS_LSP_TYPE_UNUSED2 2 |
| #define ISIS_LSP_TYPE_LEVEL_2 3 |
| |
| static struct tok isis_lsp_istype_values[] = { |
| { ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"}, |
| { ISIS_LSP_TYPE_LEVEL_1, "L1 IS"}, |
| { ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"}, |
| { ISIS_LSP_TYPE_LEVEL_2, "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 struct tok isis_ptp_adjancey_values[] = { |
| { ISIS_PTP_ADJ_UP, "Up" }, |
| { ISIS_PTP_ADJ_INIT, "Initializing" }, |
| { ISIS_PTP_ADJ_DOWN, "Down" }, |
| { 0, NULL} |
| }; |
| |
| struct isis_tlv_ptp_adj { |
| u_int8_t adjacency_state; |
| u_int8_t extd_local_circuit_id[4]; |
| u_int8_t neighbor_sysid[SYSTEM_ID_LEN]; |
| u_int8_t neighbor_extd_local_circuit_id[4]; |
| }; |
| |
| static void osi_print_cksum(const u_int8_t *pptr, u_int16_t checksum, |
| u_int checksum_offset, u_int length); |
| static int clnp_print(const u_int8_t *, u_int); |
| static void esis_print(const u_int8_t *, u_int); |
| static int isis_print(const u_int8_t *, u_int); |
| |
| struct isis_metric_block { |
| u_int8_t metric_default; |
| u_int8_t metric_delay; |
| u_int8_t metric_expense; |
| u_int8_t metric_error; |
| }; |
| |
| struct isis_tlv_is_reach { |
| struct isis_metric_block isis_metric_block; |
| u_int8_t neighbor_nodeid[NODE_ID_LEN]; |
| }; |
| |
| struct isis_tlv_es_reach { |
| struct isis_metric_block isis_metric_block; |
| u_int8_t neighbor_sysid[SYSTEM_ID_LEN]; |
| }; |
| |
| struct isis_tlv_ip_reach { |
| struct isis_metric_block isis_metric_block; |
| u_int8_t prefix[4]; |
| u_int8_t mask[4]; |
| }; |
| |
| static struct tok isis_is_reach_virtual_values[] = { |
| { 0, "IsNotVirtual"}, |
| { 1, "IsVirtual"}, |
| { 0, NULL } |
| }; |
| |
| static struct tok isis_restart_flag_values[] = { |
| { 0x1, "Restart Request"}, |
| { 0x2, "Restart Acknowledgement"}, |
| { 0x4, "Suppress adjacency advertisement"}, |
| { 0, NULL } |
| }; |
| |
| struct isis_common_header { |
| u_int8_t nlpid; |
| u_int8_t fixed_len; |
| u_int8_t version; /* Protocol version */ |
| u_int8_t id_length; |
| u_int8_t pdu_type; /* 3 MSbits are reserved */ |
| u_int8_t pdu_version; /* Packet format version */ |
| u_int8_t reserved; |
| u_int8_t max_area; |
| }; |
| |
| struct isis_iih_lan_header { |
| u_int8_t circuit_type; |
| u_int8_t source_id[SYSTEM_ID_LEN]; |
| u_int8_t holding_time[2]; |
| u_int8_t pdu_len[2]; |
| u_int8_t priority; |
| u_int8_t lan_id[NODE_ID_LEN]; |
| }; |
| |
| struct isis_iih_ptp_header { |
| u_int8_t circuit_type; |
| u_int8_t source_id[SYSTEM_ID_LEN]; |
| u_int8_t holding_time[2]; |
| u_int8_t pdu_len[2]; |
| u_int8_t circuit_id; |
| }; |
| |
| struct isis_lsp_header { |
| u_int8_t pdu_len[2]; |
| u_int8_t remaining_lifetime[2]; |
| u_int8_t lsp_id[LSP_ID_LEN]; |
| u_int8_t sequence_number[4]; |
| u_int8_t checksum[2]; |
| u_int8_t typeblock; |
| }; |
| |
| struct isis_csnp_header { |
| u_int8_t pdu_len[2]; |
| u_int8_t source_id[NODE_ID_LEN]; |
| u_int8_t start_lsp_id[LSP_ID_LEN]; |
| u_int8_t end_lsp_id[LSP_ID_LEN]; |
| }; |
| |
| struct isis_psnp_header { |
| u_int8_t pdu_len[2]; |
| u_int8_t source_id[NODE_ID_LEN]; |
| }; |
| |
| struct isis_tlv_lsp { |
| u_int8_t remaining_lifetime[2]; |
| u_int8_t lsp_id[LSP_ID_LEN]; |
| u_int8_t sequence_number[4]; |
| u_int8_t checksum[2]; |
| }; |
| |
| #define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header)) |
| #define ISIS_IIH_LAN_HEADER_SIZE (sizeof(struct isis_iih_lan_header)) |
| #define ISIS_IIH_PTP_HEADER_SIZE (sizeof(struct isis_iih_ptp_header)) |
| #define ISIS_LSP_HEADER_SIZE (sizeof(struct isis_lsp_header)) |
| #define ISIS_CSNP_HEADER_SIZE (sizeof(struct isis_csnp_header)) |
| #define ISIS_PSNP_HEADER_SIZE (sizeof(struct isis_psnp_header)) |
| |
| void isoclns_print(const u_int8_t *p, u_int length, u_int caplen) |
| { |
| if (caplen <= 1) { /* enough bytes on the wire ? */ |
| printf("|OSI"); |
| return; |
| } |
| |
| if (eflag) |
| printf("OSI NLPID %s (0x%02x): ", |
| tok2str(nlpid_values,"Unknown",*p), |
| *p); |
| |
| switch (*p) { |
| |
| case NLPID_CLNP: |
| if (!clnp_print(p, length)) |
| print_unknown_data(p,"\n\t",caplen); |
| break; |
| |
| case NLPID_ESIS: |
| esis_print(p, length); |
| return; |
| |
| case NLPID_ISIS: |
| if (!isis_print(p, length)) |
| print_unknown_data(p,"\n\t",caplen); |
| break; |
| |
| case NLPID_NULLNS: |
| (void)printf("%slength: %u", |
| eflag ? "" : ", ", |
| length); |
| break; |
| |
| case NLPID_Q933: |
| q933_print(p+1, length-1); |
| break; |
| |
| case NLPID_IP: |
| ip_print(gndo, p+1, length-1); |
| break; |
| |
| #ifdef INET6 |
| case NLPID_IP6: |
| ip6_print(gndo, p+1, length-1); |
| break; |
| #endif |
| |
| case NLPID_PPP: |
| ppp_print(p+1, length-1); |
| break; |
| |
| default: |
| if (!eflag) |
| printf("OSI NLPID 0x%02x unknown",*p); |
| (void)printf("%slength: %u", |
| eflag ? "" : ", ", |
| length); |
| if (caplen > 1) |
| print_unknown_data(p,"\n\t",caplen); |
| break; |
| } |
| } |
| |
| #define CLNP_PDU_ER 1 |
| #define CLNP_PDU_DT 28 |
| #define CLNP_PDU_MD 29 |
| #define CLNP_PDU_ERQ 30 |
| #define CLNP_PDU_ERP 31 |
| |
| static struct tok clnp_pdu_values[] = { |
| { CLNP_PDU_ER, "Error Report"}, |
| { CLNP_PDU_MD, "MD"}, |
| { CLNP_PDU_DT, "Data"}, |
| { CLNP_PDU_ERQ, "Echo Request"}, |
| { CLNP_PDU_ERP, "Echo Response"}, |
| { 0, NULL } |
| }; |
| |
| struct clnp_header_t { |
| u_int8_t nlpid; |
| u_int8_t length_indicator; |
| u_int8_t version; |
| u_int8_t lifetime; /* units of 500ms */ |
| u_int8_t type; |
| u_int8_t segment_length[2]; |
| u_int8_t cksum[2]; |
| }; |
| |
| struct clnp_segment_header_t { |
| u_int8_t data_unit_id[2]; |
| u_int8_t segment_offset[2]; |
| u_int8_t total_length[2]; |
| }; |
| |
| /* |
| * clnp_print |
| * Decode CLNP packets. Return 0 on error. |
| */ |
| |
| static int clnp_print (const u_int8_t *pptr, u_int length) |
| { |
| const u_int8_t *optr,*source_address,*dest_address; |
| u_int li,tlen,nsap_offset,source_address_length,dest_address_length, clnp_pdu_type, clnp_flags; |
| const struct clnp_header_t *clnp_header; |
| const struct clnp_segment_header_t *clnp_segment_header; |
| u_int8_t rfd_error_major,rfd_error_minor; |
| |
| clnp_header = (const struct clnp_header_t *) pptr; |
| TCHECK(*clnp_header); |
| |
| li = clnp_header->length_indicator; |
| optr = pptr; |
| |
| if (!eflag) |
| printf("CLNP"); |
| |
| /* |
| * Sanity checking of the header. |
| */ |
| |
| if (clnp_header->version != CLNP_VERSION) { |
| printf("version %d packet not supported", clnp_header->version); |
| return (0); |
| } |
| |
| /* FIXME further header sanity checking */ |
| |
| clnp_pdu_type = clnp_header->type & CLNP_PDU_TYPE_MASK; |
| clnp_flags = clnp_header->type & CLNP_FLAG_MASK; |
| |
| pptr += sizeof(struct clnp_header_t); |
| li -= sizeof(struct clnp_header_t); |
| dest_address_length = *pptr; |
| dest_address = pptr + 1; |
| |
| pptr += (1 + dest_address_length); |
| li -= (1 + dest_address_length); |
| source_address_length = *pptr; |
| source_address = pptr +1; |
| |
| pptr += (1 + source_address_length); |
| li -= (1 + source_address_length); |
| |
| if (vflag < 1) { |
| printf("%s%s > %s, %s, length %u", |
| eflag ? "" : ", ", |
| isonsap_string(source_address, source_address_length), |
| isonsap_string(dest_address, dest_address_length), |
| tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type), |
| length); |
| return (1); |
| } |
| printf("%slength %u",eflag ? "" : ", ",length); |
| |
| printf("\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, Segment PDU length: %u, checksum: 0x%04x", |
| tok2str(clnp_pdu_values, "unknown (%u)",clnp_pdu_type), |
| clnp_header->length_indicator, |
| clnp_header->version, |
| clnp_header->lifetime/2, |
| (clnp_header->lifetime%2)*5, |
| EXTRACT_16BITS(clnp_header->segment_length), |
| EXTRACT_16BITS(clnp_header->cksum)); |
| |
| osi_print_cksum(optr, EXTRACT_16BITS(clnp_header->cksum), 7, |
| clnp_header->length_indicator); |
| |
| printf("\n\tFlags [%s]", |
| bittok2str(clnp_flag_values,"none",clnp_flags)); |
| |
| printf("\n\tsource address (length %u): %s\n\tdest address (length %u): %s", |
| source_address_length, |
| isonsap_string(source_address, source_address_length), |
| dest_address_length, |
| isonsap_string(dest_address,dest_address_length)); |
| |
| if (clnp_flags & CLNP_SEGMENT_PART) { |
| clnp_segment_header = (const struct clnp_segment_header_t *) pptr; |
| TCHECK(*clnp_segment_header); |
| printf("\n\tData Unit ID: 0x%04x, Segment Offset: %u, Total PDU Length: %u", |
| EXTRACT_16BITS(clnp_segment_header->data_unit_id), |
| EXTRACT_16BITS(clnp_segment_header->segment_offset), |
| EXTRACT_16BITS(clnp_segment_header->total_length)); |
| pptr+=sizeof(const struct clnp_segment_header_t); |
| li-=sizeof(const struct clnp_segment_header_t); |
| } |
| |
| /* now walk the options */ |
| while (li >= 2) { |
| u_int op, opli; |
| const u_int8_t *tptr; |
| |
| TCHECK2(*pptr, 2); |
| if (li < 2) { |
| printf(", bad opts/li"); |
| return (0); |
| } |
| op = *pptr++; |
| opli = *pptr++; |
| li -= 2; |
| TCHECK2(*pptr, opli); |
| if (opli > li) { |
| printf(", opt (%d) too long", op); |
| return (0); |
| } |
| li -= opli; |
| tptr = pptr; |
| tlen = opli; |
| |
| printf("\n\t %s Option #%u, length %u, value: ", |
| tok2str(clnp_option_values,"Unknown",op), |
| op, |
| opli); |
| |
| switch (op) { |
| |
| |
| case CLNP_OPTION_ROUTE_RECORDING: /* those two options share the format */ |
| case CLNP_OPTION_SOURCE_ROUTING: |
| printf("%s %s", |
| tok2str(clnp_option_sr_rr_values,"Unknown",*tptr), |
| tok2str(clnp_option_sr_rr_string_values,"Unknown Option %u",op)); |
| nsap_offset=*(tptr+1); |
| if (nsap_offset == 0) { |
| printf(" Bad NSAP offset (0)"); |
| break; |
| } |
| nsap_offset-=1; /* offset to nsap list */ |
| if (nsap_offset > tlen) { |
| printf(" Bad NSAP offset (past end of option)"); |
| break; |
| } |
| tptr+=nsap_offset; |
| tlen-=nsap_offset; |
| while (tlen > 0) { |
| source_address_length=*tptr; |
| if (tlen < source_address_length+1) { |
| printf("\n\t NSAP address goes past end of option"); |
| break; |
| } |
| if (source_address_length > 0) { |
| source_address=(tptr+1); |
| TCHECK2(*source_address, source_address_length); |
| printf("\n\t NSAP address (length %u): %s", |
| source_address_length, |
| isonsap_string(source_address, source_address_length)); |
| } |
| tlen-=source_address_length+1; |
| } |
| break; |
| |
| case CLNP_OPTION_PRIORITY: |
| printf("0x%1x", *tptr&0x0f); |
| break; |
| |
| case CLNP_OPTION_QOS_MAINTENANCE: |
| printf("\n\t Format Code: %s", |
| tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK)); |
| |
| if ((*tptr&CLNP_OPTION_SCOPE_MASK) == CLNP_OPTION_SCOPE_GLOBAL) |
| printf("\n\t QoS Flags [%s]", |
| bittok2str(clnp_option_qos_global_values, |
| "none", |
| *tptr&CLNP_OPTION_OPTION_QOS_MASK)); |
| break; |
| |
| case CLNP_OPTION_SECURITY: |
| printf("\n\t Format Code: %s, Security-Level %u", |
| tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK), |
| *(tptr+1)); |
| break; |
| |
| case CLNP_OPTION_DISCARD_REASON: |
| rfd_error_major = (*tptr&0xf0) >> 4; |
| rfd_error_minor = *tptr&0x0f; |
| printf("\n\t Class: %s Error (0x%01x), %s (0x%01x)", |
| tok2str(clnp_option_rfd_class_values,"Unknown",rfd_error_major), |
| rfd_error_major, |
| tok2str(clnp_option_rfd_error_class[rfd_error_major],"Unknown",rfd_error_minor), |
| rfd_error_minor); |
| break; |
| |
| case CLNP_OPTION_PADDING: |
| printf("padding data"); |
| break; |
| |
| /* |
| * FIXME those are the defined Options that lack a decoder |
| * you are welcome to contribute code ;-) |
| */ |
| |
| default: |
| print_unknown_data(tptr,"\n\t ",opli); |
| break; |
| } |
| if (vflag > 1) |
| print_unknown_data(pptr,"\n\t ",opli); |
| pptr += opli; |
| } |
| |
| switch (clnp_pdu_type) { |
| |
| case CLNP_PDU_ER: /* fall through */ |
| case CLNP_PDU_ERP: |
| TCHECK(*pptr); |
| if (*(pptr) == NLPID_CLNP) { |
| printf("\n\t-----original packet-----\n\t"); |
| /* FIXME recursion protection */ |
| clnp_print(pptr, length-clnp_header->length_indicator); |
| break; |
| } |
| |
| case CLNP_PDU_DT: |
| case CLNP_PDU_MD: |
| case CLNP_PDU_ERQ: |
| |
| default: |
| /* dump the PDU specific data */ |
| if (length-(pptr-optr) > 0) { |
| printf("\n\t undecoded non-header data, length %u",length-clnp_header->length_indicator); |
| print_unknown_data(pptr,"\n\t ",length-(pptr-optr)); |
| } |
| } |
| |
| return (1); |
| |
| trunc: |
| fputs("[|clnp]", stdout); |
| return (1); |
| |
| } |
| |
| |
| #define ESIS_PDU_REDIRECT 6 |
| #define ESIS_PDU_ESH 2 |
| #define ESIS_PDU_ISH 4 |
| |
| static struct tok esis_pdu_values[] = { |
| { ESIS_PDU_REDIRECT, "redirect"}, |
| { ESIS_PDU_ESH, "ESH"}, |
| { ESIS_PDU_ISH, "ISH"}, |
| { 0, NULL } |
| }; |
| |
| struct esis_header_t { |
| u_int8_t nlpid; |
| u_int8_t length_indicator; |
| u_int8_t version; |
| u_int8_t reserved; |
| u_int8_t type; |
| u_int8_t holdtime[2]; |
| u_int8_t cksum[2]; |
| }; |
| |
| static void |
| esis_print(const u_int8_t *pptr, u_int length) |
| { |
| const u_int8_t *optr; |
| u_int li,esis_pdu_type,source_address_length, source_address_number; |
| const struct esis_header_t *esis_header; |
| |
| if (!eflag) |
| printf("ES-IS"); |
| |
| if (length <= 2) { |
| if (qflag) |
| printf("bad pkt!"); |
| else |
| printf("no header at all!"); |
| return; |
| } |
| |
| esis_header = (const struct esis_header_t *) pptr; |
| TCHECK(*esis_header); |
| li = esis_header->length_indicator; |
| optr = pptr; |
| |
| /* |
| * Sanity checking of the header. |
| */ |
| |
| if (esis_header->nlpid != NLPID_ESIS) { |
| printf(" nlpid 0x%02x packet not supported", esis_header->nlpid); |
| return; |
| } |
| |
| if (esis_header->version != ESIS_VERSION) { |
| printf(" version %d packet not supported", esis_header->version); |
| return; |
| } |
| |
| if (li > length) { |
| printf(" length indicator(%d) > PDU size (%d)!", li, length); |
| return; |
| } |
| |
| if (li < sizeof(struct esis_header_t) + 2) { |
| printf(" length indicator < min PDU size %d:", li); |
| while (--length != 0) |
| printf("%02X", *pptr++); |
| return; |
| } |
| |
| esis_pdu_type = esis_header->type & ESIS_PDU_TYPE_MASK; |
| |
| if (vflag < 1) { |
| printf("%s%s, length %u", |
| eflag ? "" : ", ", |
| tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type), |
| length); |
| return; |
| } else |
| printf("%slength %u\n\t%s (%u)", |
| eflag ? "" : ", ", |
| length, |
| tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type), |
| esis_pdu_type); |
| |
| printf(", v: %u%s", esis_header->version, esis_header->version == ESIS_VERSION ? "" : "unsupported" ); |
| printf(", checksum: 0x%04x", EXTRACT_16BITS(esis_header->cksum)); |
| |
| osi_print_cksum(pptr, EXTRACT_16BITS(esis_header->cksum), 7, li); |
| |
| printf(", holding time: %us, length indicator: %u",EXTRACT_16BITS(esis_header->holdtime),li); |
| |
| if (vflag > 1) |
| print_unknown_data(optr,"\n\t",sizeof(struct esis_header_t)); |
| |
| pptr += sizeof(struct esis_header_t); |
| li -= sizeof(struct esis_header_t); |
| |
| switch (esis_pdu_type) { |
| case ESIS_PDU_REDIRECT: { |
| const u_int8_t *dst, *snpa, *neta; |
| u_int dstl, snpal, netal; |
| |
| TCHECK(*pptr); |
| if (li < 1) { |
| printf(", bad redirect/li"); |
| return; |
| } |
| dstl = *pptr; |
| pptr++; |
| li--; |
| TCHECK2(*pptr, dstl); |
| if (li < dstl) { |
| printf(", bad redirect/li"); |
| return; |
| } |
| dst = pptr; |
| pptr += dstl; |
| li -= dstl; |
| printf("\n\t %s", isonsap_string(dst,dstl)); |
| |
| TCHECK(*pptr); |
| if (li < 1) { |
| printf(", bad redirect/li"); |
| return; |
| } |
| snpal = *pptr; |
| pptr++; |
| li--; |
| TCHECK2(*pptr, snpal); |
| if (li < snpal) { |
| printf(", bad redirect/li"); |
| return; |
| } |
| snpa = pptr; |
| pptr += snpal; |
| li -= snpal; |
| TCHECK(*pptr); |
| if (li < 1) { |
| printf(", bad redirect/li"); |
| return; |
| } |
| netal = *pptr; |
| pptr++; |
| TCHECK2(*pptr, netal); |
| if (li < netal) { |
| printf(", bad redirect/li"); |
| return; |
| } |
| neta = pptr; |
| pptr += netal; |
| li -= netal; |
| |
| if (netal == 0) |
| printf("\n\t %s", etheraddr_string(snpa)); |
| else |
| printf("\n\t %s", isonsap_string(neta,netal)); |
| break; |
| } |
| |
| case ESIS_PDU_ESH: |
| TCHECK(*pptr); |
| if (li < 1) { |
| printf(", bad esh/li"); |
| return; |
| } |
| source_address_number = *pptr; |
| pptr++; |
| li--; |
| |
| printf("\n\t Number of Source Addresses: %u", source_address_number); |
| |
| while (source_address_number > 0) { |
| TCHECK(*pptr); |
| if (li < 1) { |
| printf(", bad esh/li"); |
| return; |
| } |
| source_address_length = *pptr; |
| pptr++; |
| li--; |
| |
| TCHECK2(*pptr, source_address_length); |
| if (li < source_address_length) { |
| printf(", bad esh/li"); |
| return; |
| } |
| printf("\n\t NET (length: %u): %s", |
| source_address_length, |
| isonsap_string(pptr,source_address_length)); |
| pptr += source_address_length; |
| li -= source_address_length; |
| source_address_number--; |
| } |
| |
| break; |
| |
| case ESIS_PDU_ISH: { |
| TCHECK(*pptr); |
| if (li < 1) { |
| printf(", bad ish/li"); |
| return; |
| } |
| source_address_length = *pptr; |
| pptr++; |
| li--; |
| TCHECK2(*pptr, source_address_length); |
| if (li < source_address_length) { |
| printf(", bad ish/li"); |
| return; |
| } |
| printf("\n\t NET (length: %u): %s", source_address_length, isonsap_string(pptr, source_address_length)); |
| pptr += source_address_length; |
| li -= source_address_length; |
| break; |
| } |
| |
| default: |
| if (vflag <= 1) { |
| if (pptr < snapend) |
| print_unknown_data(pptr,"\n\t ",snapend-pptr); |
| } |
| return; |
| } |
| |
| /* now walk the options */ |
| while (li != 0) { |
| u_int op, opli; |
| const u_int8_t *tptr; |
| |
| if (li < 2) { |
| printf(", bad opts/li"); |
| return; |
| } |
| TCHECK2(*pptr, 2); |
| op = *pptr++; |
| opli = *pptr++; |
| li -= 2; |
| if (opli > li) { |
| printf(", opt (%d) too long", op); |
| return; |
| } |
| li -= opli; |
| tptr = pptr; |
| |
| printf("\n\t %s Option #%u, length %u, value: ", |
| tok2str(esis_option_values,"Unknown",op), |
| op, |
| opli); |
| |
| switch (op) { |
| |
| case ESIS_OPTION_ES_CONF_TIME: |
| if (opli == 2) { |
| TCHECK2(*pptr, 2); |
| printf("%us", EXTRACT_16BITS(tptr)); |
| } else |
| printf("(bad length)"); |
| break; |
| |
| case ESIS_OPTION_PROTOCOLS: |
| while (opli>0) { |
| TCHECK(*pptr); |
| printf("%s (0x%02x)", |
| tok2str(nlpid_values, |
| "unknown", |
| *tptr), |
| *tptr); |
| if (opli>1) /* further NPLIDs ? - put comma */ |
| printf(", "); |
| tptr++; |
| opli--; |
| } |
| break; |
| |
| /* |
| * FIXME those are the defined Options that lack a decoder |
| * you are welcome to contribute code ;-) |
| */ |
| |
| case ESIS_OPTION_QOS_MAINTENANCE: |
| case ESIS_OPTION_SECURITY: |
| case ESIS_OPTION_PRIORITY: |
| case ESIS_OPTION_ADDRESS_MASK: |
| case ESIS_OPTION_SNPA_MASK: |
| |
| default: |
| print_unknown_data(tptr,"\n\t ",opli); |
| break; |
| } |
| if (vflag > 1) |
| print_unknown_data(pptr,"\n\t ",opli); |
| pptr += opli; |
| } |
| trunc: |
| return; |
| } |
| |
| /* shared routine for printing system, node and lsp-ids */ |
| static char * |
| isis_print_id(const u_int8_t *cp, int id_len) |
| { |
| int i; |
| static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")]; |
| char *pos = id; |
| |
| for (i = 1; i <= SYSTEM_ID_LEN; i++) { |
| snprintf(pos, sizeof(id) - (pos - id), "%02x", *cp++); |
| pos += strlen(pos); |
| if (i == 2 || i == 4) |
| *pos++ = '.'; |
| } |
| if (id_len >= NODE_ID_LEN) { |
| snprintf(pos, sizeof(id) - (pos - id), ".%02x", *cp++); |
| pos += strlen(pos); |
| } |
| if (id_len == LSP_ID_LEN) |
| snprintf(pos, sizeof(id) - (pos - id), "-%02x", *cp); |
| return (id); |
| } |
| |
| /* print the 4-byte metric block which is common found in the old-style TLVs */ |
| static int |
| isis_print_metric_block (const struct isis_metric_block *isis_metric_block) |
| { |
| printf(", Default Metric: %d, %s", |
| ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default), |
| ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal"); |
| if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay)) |
| printf("\n\t\t Delay Metric: %d, %s", |
| ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay), |
| ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal"); |
| if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense)) |
| printf("\n\t\t Expense Metric: %d, %s", |
| ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense), |
| ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal"); |
| if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error)) |
| printf("\n\t\t Error Metric: %d, %s", |
| ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error), |
| ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal"); |
| |
| return(1); /* everything is ok */ |
| } |
| |
| static int |
| isis_print_tlv_ip_reach (const u_int8_t *cp, const char *ident, int length) |
| { |
| int prefix_len; |
| const struct isis_tlv_ip_reach *tlv_ip_reach; |
| |
| tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp; |
| |
| while (length > 0) { |
| if ((size_t)length < sizeof(*tlv_ip_reach)) { |
| printf("short IPv4 Reachability (%d vs %lu)", |
| length, |
| (unsigned long)sizeof(*tlv_ip_reach)); |
| return (0); |
| } |
| |
| if (!TTEST(*tlv_ip_reach)) |
| return (0); |
| |
| prefix_len = mask2plen(EXTRACT_32BITS(tlv_ip_reach->mask)); |
| |
| if (prefix_len == -1) |
| printf("%sIPv4 prefix: %s mask %s", |
| ident, |
| ipaddr_string((tlv_ip_reach->prefix)), |
| ipaddr_string((tlv_ip_reach->mask))); |
| else |
| printf("%sIPv4 prefix: %15s/%u", |
| ident, |
| ipaddr_string((tlv_ip_reach->prefix)), |
| prefix_len); |
| |
| printf(", Distribution: %s, Metric: %u, %s", |
| ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up", |
| ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default), |
| ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal"); |
| |
| if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay)) |
| printf("%s Delay Metric: %u, %s", |
| ident, |
| ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay), |
| ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal"); |
| |
| if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense)) |
| printf("%s Expense Metric: %u, %s", |
| ident, |
| ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense), |
| ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal"); |
| |
| if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error)) |
| printf("%s Error Metric: %u, %s", |
| ident, |
| ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error), |
| ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal"); |
| |
| length -= sizeof(struct isis_tlv_ip_reach); |
| tlv_ip_reach++; |
| } |
| return (1); |
| } |
| |
| /* |
| * this is the common IP-REACH subTLV decoder it is called |
| * from various EXTD-IP REACH TLVs (135,235,236,237) |
| */ |
| |
| static int |
| isis_print_ip_reach_subtlv (const u_int8_t *tptr,int subt,int subl,const char *ident) { |
| |
| /* first lets see if we know the subTLVs name*/ |
| printf("%s%s subTLV #%u, length: %u", |
| ident, |
| tok2str(isis_ext_ip_reach_subtlv_values, |
| "unknown", |
| subt), |
| subt, |
| subl); |
| |
| if (!TTEST2(*tptr,subl)) |
| goto trunctlv; |
| |
| switch(subt) { |
| case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */ |
| case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32: |
| while (subl >= 4) { |
| printf(", 0x%08x (=%u)", |
| EXTRACT_32BITS(tptr), |
| EXTRACT_32BITS(tptr)); |
| tptr+=4; |
| subl-=4; |
| } |
| break; |
| case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64: |
| while (subl >= 8) { |
| printf(", 0x%08x%08x", |
| EXTRACT_32BITS(tptr), |
| EXTRACT_32BITS(tptr+4)); |
| tptr+=8; |
| subl-=8; |
| } |
| break; |
| default: |
| if(!print_unknown_data(tptr,"\n\t\t ", |
| subl)) |
| return(0); |
| break; |
| } |
| return(1); |
| |
| trunctlv: |
| printf("%spacket exceeded snapshot",ident); |
| return(0); |
| } |
| |
| /* |
| * this is the common IS-REACH subTLV decoder it is called |
| * from isis_print_ext_is_reach() |
| */ |
| |
| static int |
| isis_print_is_reach_subtlv (const u_int8_t *tptr,u_int subt,u_int subl,const char *ident) { |
| |
| u_int te_class,priority_level,gmpls_switch_cap; |
| union { /* int to float conversion buffer for several subTLVs */ |
| float f; |
| u_int32_t i; |
| } bw; |
| |
| /* first lets see if we know the subTLVs name*/ |
| printf("%s%s subTLV #%u, length: %u", |
| ident, |
| tok2str(isis_ext_is_reach_subtlv_values, |
| "unknown", |
| subt), |
| subt, |
| subl); |
| |
| if (!TTEST2(*tptr,subl)) |
| goto trunctlv; |
| |
| switch(subt) { |
| case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP: |
| case ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID: |
| case ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID: |
| if (subl >= 4) { |
| printf(", 0x%08x", EXTRACT_32BITS(tptr)); |
| if (subl == 8) /* rfc4205 */ |
| printf(", 0x%08x", EXTRACT_32BITS(tptr+4)); |
| } |
| break; |
| case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR: |
| case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR: |
| if (subl >= sizeof(struct in_addr)) |
| printf(", %s", ipaddr_string(tptr)); |
| break; |
| case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW : |
| case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW: |
| if (subl >= 4) { |
| bw.i = EXTRACT_32BITS(tptr); |
| printf(", %.3f Mbps", bw.f*8/1000000 ); |
| } |
| break; |
| case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW : |
| if (subl >= 32) { |
| for (te_class = 0; te_class < 8; te_class++) { |
| bw.i = EXTRACT_32BITS(tptr); |
| printf("%s TE-Class %u: %.3f Mbps", |
| ident, |
| te_class, |
| bw.f*8/1000000 ); |
| tptr+=4; |
| } |
| } |
| break; |
| case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */ |
| case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD: |
| printf("%sBandwidth Constraints Model ID: %s (%u)", |
| ident, |
| tok2str(diffserv_te_bc_values, "unknown", *tptr), |
| *tptr); |
| tptr++; |
| /* decode BCs until the subTLV ends */ |
| for (te_class = 0; te_class < (subl-1)/4; te_class++) { |
| bw.i = EXTRACT_32BITS(tptr); |
| printf("%s Bandwidth constraint CT%u: %.3f Mbps", |
| ident, |
| te_class, |
| bw.f*8/1000000 ); |
| tptr+=4; |
| } |
| break; |
| case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC: |
| if (subl >= 3) |
| printf(", %u", EXTRACT_24BITS(tptr)); |
| break; |
| case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE: |
| if (subl == 2) { |
| printf(", [ %s ] (0x%04x)", |
| bittok2str(isis_subtlv_link_attribute_values, |
| "Unknown", |
| EXTRACT_16BITS(tptr)), |
| EXTRACT_16BITS(tptr)); |
| } |
| break; |
| case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE: |
| if (subl >= 2) { |
| printf(", %s, Priority %u", |
| bittok2str(gmpls_link_prot_values, "none", *tptr), |
| *(tptr+1)); |
| } |
| break; |
| case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR: |
| if (subl >= 36) { |
| gmpls_switch_cap = *tptr; |
| printf("%s Interface Switching Capability:%s", |
| ident, |
| tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap)); |
| printf(", LSP Encoding: %s", |
| tok2str(gmpls_encoding_values, "Unknown", *(tptr+1))); |
| tptr+=4; |
| printf("%s Max LSP Bandwidth:",ident); |
| for (priority_level = 0; priority_level < 8; priority_level++) { |
| bw.i = EXTRACT_32BITS(tptr); |
| printf("%s priority level %d: %.3f Mbps", |
| ident, |
| priority_level, |
| bw.f*8/1000000 ); |
| tptr+=4; |
| } |
| subl-=36; |
| switch (gmpls_switch_cap) { |
| case GMPLS_PSC1: |
| case GMPLS_PSC2: |
| case GMPLS_PSC3: |
| case GMPLS_PSC4: |
| bw.i = EXTRACT_32BITS(tptr); |
| printf("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f*8/1000000); |
| printf("%s Interface MTU: %u", ident, EXTRACT_16BITS(tptr+4)); |
| break; |
| case GMPLS_TSC: |
| bw.i = EXTRACT_32BITS(tptr); |
| printf("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f*8/1000000); |
| printf("%s Indication %s", ident, |
| tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", *(tptr+4))); |
| break; |
| default: |
| /* there is some optional stuff left to decode but this is as of yet |
| not specified so just lets hexdump what is left */ |
| if(subl>0){ |
| if(!print_unknown_data(tptr,"\n\t\t ", |
| subl)) |
| return(0); |
| } |
| } |
| } |
| break; |
| default: |
| if(!print_unknown_data(tptr,"\n\t\t ", |
| subl)) |
| return(0); |
| break; |
| } |
| return(1); |
| |
| trunctlv: |
| printf("%spacket exceeded snapshot",ident); |
| return(0); |
| } |
| |
| |
| /* |
| * this is the common IS-REACH decoder it is called |
| * from various EXTD-IS REACH style TLVs (22,24,222) |
| */ |
| |
| static int |
| isis_print_ext_is_reach (const u_int8_t *tptr,const char *ident, int tlv_type) { |
| |
| char ident_buffer[20]; |
| int subtlv_type,subtlv_len,subtlv_sum_len; |
| int proc_bytes = 0; /* how many bytes did we process ? */ |
| |
| if (!TTEST2(*tptr, NODE_ID_LEN)) |
| return(0); |
| |
| printf("%sIS Neighbor: %s", ident, isis_print_id(tptr, NODE_ID_LEN)); |
| tptr+=(NODE_ID_LEN); |
| |
| if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */ |
| if (!TTEST2(*tptr, 3)) /* and is therefore skipped */ |
| return(0); |
| printf(", Metric: %d",EXTRACT_24BITS(tptr)); |
| tptr+=3; |
| } |
| |
| if (!TTEST2(*tptr, 1)) |
| return(0); |
| subtlv_sum_len=*(tptr++); /* read out subTLV length */ |
| proc_bytes=NODE_ID_LEN+3+1; |
| printf(", %ssub-TLVs present",subtlv_sum_len ? "" : "no "); |
| if (subtlv_sum_len) { |
| printf(" (%u)",subtlv_sum_len); |
| while (subtlv_sum_len>0) { |
| if (!TTEST2(*tptr,2)) |
| return(0); |
| subtlv_type=*(tptr++); |
| subtlv_len=*(tptr++); |
| /* prepend the ident string */ |
| snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident); |
| if(!isis_print_is_reach_subtlv(tptr,subtlv_type,subtlv_len,ident_buffer)) |
| return(0); |
| tptr+=subtlv_len; |
| subtlv_sum_len-=(subtlv_len+2); |
| proc_bytes+=(subtlv_len+2); |
| } |
| } |
| return(proc_bytes); |
| } |
| |
| /* |
| * this is the common Multi Topology ID decoder |
| * it is called from various MT-TLVs (222,229,235,237) |
| */ |
| |
| static int |
| isis_print_mtid (const u_int8_t *tptr,const char *ident) { |
| |
| if (!TTEST2(*tptr, 2)) |
| return(0); |
| |
| printf("%s%s", |
| ident, |
| tok2str(isis_mt_values, |
| "Reserved for IETF Consensus", |
| ISIS_MASK_MTID(EXTRACT_16BITS(tptr)))); |
| |
| printf(" Topology (0x%03x), Flags: [%s]", |
| ISIS_MASK_MTID(EXTRACT_16BITS(tptr)), |
| bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(EXTRACT_16BITS(tptr)))); |
| |
| return(2); |
| } |
| |
| /* |
| * this is the common extended IP reach decoder |
| * it is called from TLVs (135,235,236,237) |
| * we process the TLV and optional subTLVs and return |
| * the amount of processed bytes |
| */ |
| |
| static int |
| isis_print_extd_ip_reach (const u_int8_t *tptr, const char *ident, u_int16_t afi) { |
| |
| char ident_buffer[20]; |
| #ifdef INET6 |
| u_int8_t prefix[sizeof(struct in6_addr)]; /* shared copy buffer for IPv4 and IPv6 prefixes */ |
| #else |
| u_int8_t prefix[sizeof(struct in_addr)]; /* shared copy buffer for IPv4 prefixes */ |
| #endif |
| u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen; |
| |
| if (!TTEST2(*tptr, 4)) |
| return (0); |
| metric = EXTRACT_32BITS(tptr); |
| processed=4; |
| tptr+=4; |
| |
| if (afi == AF_INET) { |
| if (!TTEST2(*tptr, 1)) /* fetch status byte */ |
| return (0); |
| status_byte=*(tptr++); |
| bit_length = status_byte&0x3f; |
| if (bit_length > 32) { |
| printf("%sIPv4 prefix: bad bit length %u", |
| ident, |
| bit_length); |
| return (0); |
| } |
| processed++; |
| #ifdef INET6 |
| } else if (afi == AF_INET6) { |
| if (!TTEST2(*tptr, 1)) /* fetch status & prefix_len byte */ |
| return (0); |
| status_byte=*(tptr++); |
| bit_length=*(tptr++); |
| if (bit_length > 128) { |
| printf("%sIPv6 prefix: bad bit length %u", |
| ident, |
| bit_length); |
| return (0); |
| } |
| processed+=2; |
| #endif |
| } else |
| return (0); /* somebody is fooling us */ |
| |
| byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */ |
| |
| if (!TTEST2(*tptr, byte_length)) |
| return (0); |
| memset(prefix, 0, sizeof prefix); /* clear the copy buffer */ |
| memcpy(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */ |
| tptr+=byte_length; |
| processed+=byte_length; |
| |
| if (afi == AF_INET) |
| printf("%sIPv4 prefix: %15s/%u", |
| ident, |
| ipaddr_string(prefix), |
| bit_length); |
| #ifdef INET6 |
| if (afi == AF_INET6) |
| printf("%sIPv6 prefix: %s/%u", |
| ident, |
| ip6addr_string(prefix), |
| bit_length); |
| #endif |
| |
| printf(", Distribution: %s, Metric: %u", |
| ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up", |
| metric); |
| |
| if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte)) |
| printf(", sub-TLVs present"); |
| #ifdef INET6 |
| if (afi == AF_INET6) |
| printf(", %s%s", |
| ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal", |
| ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : ""); |
| #endif |
| |
| if ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte)) |
| #ifdef INET6 |
| || (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte)) |
| #endif |
| ) { |
| /* assume that one prefix can hold more |
| than one subTLV - therefore the first byte must reflect |
| the aggregate bytecount of the subTLVs for this prefix |
| */ |
| if (!TTEST2(*tptr, 1)) |
| return (0); |
| sublen=*(tptr++); |
| processed+=sublen+1; |
| printf(" (%u)",sublen); /* print out subTLV length */ |
| |
| while (sublen>0) { |
| if (!TTEST2(*tptr,2)) |
| return (0); |
| subtlvtype=*(tptr++); |
| subtlvlen=*(tptr++); |
| /* prepend the ident string */ |
| snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident); |
| if(!isis_print_ip_reach_subtlv(tptr,subtlvtype,subtlvlen,ident_buffer)) |
| return(0); |
| tptr+=subtlvlen; |
| sublen-=(subtlvlen+2); |
| } |
| } |
| return (processed); |
| } |
| |
| /* |
| * isis_print |
| * Decode IS-IS packets. Return 0 on error. |
| */ |
| |
| static int isis_print (const u_int8_t *p, u_int length) |
| { |
| const struct isis_common_header *isis_header; |
| |
| const struct isis_iih_lan_header *header_iih_lan; |
| const struct isis_iih_ptp_header *header_iih_ptp; |
| struct isis_lsp_header *header_lsp; |
| const struct isis_csnp_header *header_csnp; |
| const struct isis_psnp_header *header_psnp; |
| |
| const struct isis_tlv_lsp *tlv_lsp; |
| const struct isis_tlv_ptp_adj *tlv_ptp_adj; |
| const struct isis_tlv_is_reach *tlv_is_reach; |
| const struct isis_tlv_es_reach *tlv_es_reach; |
| |
| u_int8_t pdu_type, max_area, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len; |
| u_int8_t ext_is_len, ext_ip_len, mt_len; |
| const u_int8_t *optr, *pptr, *tptr; |
| u_short packet_len,pdu_len, key_id; |
| u_int i,vendor_id; |
| int sigcheck; |
| |
| packet_len=length; |
| optr = p; /* initialize the _o_riginal pointer to the packet start - |
| need it for parsing the checksum TLV and authentication |
| TLV verification */ |
| isis_header = (const struct isis_common_header *)p; |
| TCHECK(*isis_header); |
| pptr = p+(ISIS_COMMON_HEADER_SIZE); |
| header_iih_lan = (const struct isis_iih_lan_header *)pptr; |
| header_iih_ptp = (const struct isis_iih_ptp_header *)pptr; |
| header_lsp = (struct isis_lsp_header *)pptr; |
| header_csnp = (const struct isis_csnp_header *)pptr; |
| header_psnp = (const struct isis_psnp_header *)pptr; |
| |
| if (!eflag) |
| printf("IS-IS"); |
| |
| /* |
| * Sanity checking of the header. |
| */ |
| |
| if (isis_header->version != ISIS_VERSION) { |
| printf("version %d packet not supported", isis_header->version); |
| return (0); |
| } |
| |
| if ((isis_header->id_length != SYSTEM_ID_LEN) && (isis_header->id_length != 0)) { |
| printf("system ID length of %d is not supported", |
| isis_header->id_length); |
| return (0); |
| } |
| |
| if (isis_header->pdu_version != ISIS_VERSION) { |
| printf("version %d packet not supported", isis_header->pdu_version); |
| return (0); |
| } |
| |
| max_area = isis_header->max_area; |
| switch(max_area) { |
| case 0: |
| max_area = 3; /* silly shit */ |
| break; |
| case 255: |
| printf("bad packet -- 255 areas"); |
| return (0); |
| default: |
| break; |
| } |
| |
| id_length = isis_header->id_length; |
| switch(id_length) { |
| case 0: |
| id_length = 6; /* silly shit again */ |
| break; |
| case 1: /* 1-8 are valid sys-ID lenghts */ |
| case 2: |
| case 3: |
| case 4: |
| case 5: |
| case 6: |
| case 7: |
| case 8: |
| break; |
| case 255: |
| id_length = 0; /* entirely useless */ |
| break; |
| default: |
| break; |
| } |
| |
| /* toss any non 6-byte sys-ID len PDUs */ |
| if (id_length != 6 ) { |
| printf("bad packet -- illegal sys-ID length (%u)", id_length); |
| return (0); |
| } |
| |
| pdu_type=isis_header->pdu_type; |
| |
| /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/ |
| if (vflag < 1) { |
| printf("%s%s", |
| eflag ? "" : ", ", |
| tok2str(isis_pdu_values,"unknown PDU-Type %u",pdu_type)); |
| |
| switch (pdu_type) { |
| |
| case ISIS_PDU_L1_LAN_IIH: |
| case ISIS_PDU_L2_LAN_IIH: |
| printf(", src-id %s", |
| isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN)); |
| printf(", lan-id %s, prio %u", |
| isis_print_id(header_iih_lan->lan_id,NODE_ID_LEN), |
| header_iih_lan->priority); |
| break; |
| case ISIS_PDU_PTP_IIH: |
| printf(", src-id %s", isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN)); |
| break; |
| case ISIS_PDU_L1_LSP: |
| case ISIS_PDU_L2_LSP: |
| printf(", lsp-id %s, seq 0x%08x, lifetime %5us", |
| isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), |
| EXTRACT_32BITS(header_lsp->sequence_number), |
| EXTRACT_16BITS(header_lsp->remaining_lifetime)); |
| break; |
| case ISIS_PDU_L1_CSNP: |
| case ISIS_PDU_L2_CSNP: |
| printf(", src-id %s", isis_print_id(header_csnp->source_id,NODE_ID_LEN)); |
| break; |
| case ISIS_PDU_L1_PSNP: |
| case ISIS_PDU_L2_PSNP: |
| printf(", src-id %s", isis_print_id(header_psnp->source_id,NODE_ID_LEN)); |
| break; |
| |
| } |
| printf(", length %u", length); |
| |
| return(1); |
| } |
| |
| /* ok they seem to want to know everything - lets fully decode it */ |
| printf("%slength %u", eflag ? "" : ", ",length); |
| |
| printf("\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)", |
| tok2str(isis_pdu_values, |
| "unknown, type %u", |
| pdu_type), |
| isis_header->fixed_len, |
| isis_header->version, |
| isis_header->pdu_version, |
| id_length, |
| isis_header->id_length, |
| max_area, |
| isis_header->max_area); |
| |
| if (vflag > 1) { |
| if(!print_unknown_data(optr,"\n\t",8)) /* provide the _o_riginal pointer */ |
| return(0); /* for optionally debugging the common header */ |
| } |
| |
| switch (pdu_type) { |
| |
| case ISIS_PDU_L1_LAN_IIH: |
| case ISIS_PDU_L2_LAN_IIH: |
| if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) { |
| printf(", bogus fixed header length %u should be %lu", |
| isis_header->fixed_len, (unsigned long)ISIS_IIH_LAN_HEADER_SIZE); |
| return (0); |
| } |
| |
| pdu_len=EXTRACT_16BITS(header_iih_lan->pdu_len); |
| if (packet_len>pdu_len) { |
| packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ |
| length=pdu_len; |
| } |
| |
| TCHECK(*header_iih_lan); |
| printf("\n\t source-id: %s, holding time: %us, Flags: [%s]", |
| isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN), |
| EXTRACT_16BITS(header_iih_lan->holding_time), |
| tok2str(isis_iih_circuit_type_values, |
| "unknown circuit type 0x%02x", |
| header_iih_lan->circuit_type)); |
| |
| printf("\n\t lan-id: %s, Priority: %u, PDU length: %u", |
| isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN), |
| (header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK, |
| pdu_len); |
| |
| if (vflag > 1) { |
| if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_LAN_HEADER_SIZE)) |
| return(0); |
| } |
| |
| packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE); |
| pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE); |
| break; |
| |
| case ISIS_PDU_PTP_IIH: |
| if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) { |
| printf(", bogus fixed header length %u should be %lu", |
| isis_header->fixed_len, (unsigned long)ISIS_IIH_PTP_HEADER_SIZE); |
| return (0); |
| } |
| |
| pdu_len=EXTRACT_16BITS(header_iih_ptp->pdu_len); |
| if (packet_len>pdu_len) { |
| packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ |
| length=pdu_len; |
| } |
| |
| TCHECK(*header_iih_ptp); |
| printf("\n\t source-id: %s, holding time: %us, Flags: [%s]", |
| isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN), |
| EXTRACT_16BITS(header_iih_ptp->holding_time), |
| tok2str(isis_iih_circuit_type_values, |
| "unknown circuit type 0x%02x", |
| header_iih_ptp->circuit_type)); |
| |
| printf("\n\t circuit-id: 0x%02x, PDU length: %u", |
| header_iih_ptp->circuit_id, |
| pdu_len); |
| |
| if (vflag > 1) { |
| if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_PTP_HEADER_SIZE)) |
| return(0); |
| } |
| |
| packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE); |
| pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE); |
| break; |
| |
| case ISIS_PDU_L1_LSP: |
| case ISIS_PDU_L2_LSP: |
| if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) { |
| printf(", bogus fixed header length %u should be %lu", |
| isis_header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE); |
| return (0); |
| } |
| |
| pdu_len=EXTRACT_16BITS(header_lsp->pdu_len); |
| if (packet_len>pdu_len) { |
| packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ |
| length=pdu_len; |
| } |
| |
| TCHECK(*header_lsp); |
| printf("\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x", |
| isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), |
| EXTRACT_32BITS(header_lsp->sequence_number), |
| EXTRACT_16BITS(header_lsp->remaining_lifetime), |
| EXTRACT_16BITS(header_lsp->checksum)); |
| |
| |
| osi_print_cksum((u_int8_t *)header_lsp->lsp_id, |
| EXTRACT_16BITS(header_lsp->checksum), 12, length-12); |
| |
| /* |
| * Clear checksum and lifetime prior to signature verification. |
| */ |
| header_lsp->checksum[0] = 0; |
| header_lsp->checksum[1] = 0; |
| header_lsp->remaining_lifetime[0] = 0; |
| header_lsp->remaining_lifetime[1] = 0; |
| |
| |
| printf(", PDU length: %u, Flags: [ %s", |
| pdu_len, |
| ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : ""); |
| |
| if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) { |
| printf("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : ""); |
| printf("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : ""); |
| printf("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : ""); |
| printf("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : ""); |
| printf("ATT bit set, "); |
| } |
| printf("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : ""); |
| printf("%s ]", tok2str(isis_lsp_istype_values,"Unknown(0x%x)",ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock))); |
| |
| if (vflag > 1) { |
| if(!print_unknown_data(pptr,"\n\t ",ISIS_LSP_HEADER_SIZE)) |
| return(0); |
| } |
| |
| packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE); |
| pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE); |
| break; |
| |
| case ISIS_PDU_L1_CSNP: |
| case ISIS_PDU_L2_CSNP: |
| if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) { |
| printf(", bogus fixed header length %u should be %lu", |
| isis_header->fixed_len, (unsigned long)ISIS_CSNP_HEADER_SIZE); |
| return (0); |
| } |
| |
| pdu_len=EXTRACT_16BITS(header_csnp->pdu_len); |
| if (packet_len>pdu_len) { |
| packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ |
| length=pdu_len; |
| } |
| |
| TCHECK(*header_csnp); |
| printf("\n\t source-id: %s, PDU length: %u", |
| isis_print_id(header_csnp->source_id, NODE_ID_LEN), |
| pdu_len); |
| printf("\n\t start lsp-id: %s", |
| isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN)); |
| printf("\n\t end lsp-id: %s", |
| isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN)); |
| |
| if (vflag > 1) { |
| if(!print_unknown_data(pptr,"\n\t ",ISIS_CSNP_HEADER_SIZE)) |
| return(0); |
| } |
| |
| packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE); |
| pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE); |
| break; |
| |
| case ISIS_PDU_L1_PSNP: |
| case ISIS_PDU_L2_PSNP: |
| if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) { |
| printf("- bogus fixed header length %u should be %lu", |
| isis_header->fixed_len, (unsigned long)ISIS_PSNP_HEADER_SIZE); |
| return (0); |
| } |
| |
| pdu_len=EXTRACT_16BITS(header_psnp->pdu_len); |
| if (packet_len>pdu_len) { |
| packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ |
| length=pdu_len; |
| } |
| |
| TCHECK(*header_psnp); |
| printf("\n\t source-id: %s, PDU length: %u", |
| isis_print_id(header_psnp->source_id, NODE_ID_LEN), |
| pdu_len); |
| |
| if (vflag > 1) { |
| if(!print_unknown_data(pptr,"\n\t ",ISIS_PSNP_HEADER_SIZE)) |
| return(0); |
| } |
| |
| packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE); |
| pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE); |
| break; |
| |
| default: |
| if(!print_unknown_data(pptr,"\n\t ",length)) |
| return(0); |
| return (0); |
| } |
| |
| /* |
| * Now print the TLV's. |
| */ |
| |
| while (packet_len >= 2) { |
| if (pptr == snapend) { |
| return (1); |
| } |
| |
| if (!TTEST2(*pptr, 2)) { |
| printf("\n\t\t packet exceeded snapshot (%ld) bytes", |
| (long)(pptr-snapend)); |
| return (1); |
| } |
| tlv_type = *pptr++; |
| tlv_len = *pptr++; |
| tmp =tlv_len; /* copy temporary len & pointer to packet data */ |
| tptr = pptr; |
| packet_len -= 2; |
| if (tlv_len > packet_len) { |
| break; |
| } |
| |
| /* first lets see if we know the TLVs name*/ |
| printf("\n\t %s TLV #%u, length: %u", |
| tok2str(isis_tlv_values, |
| "unknown", |
| tlv_type), |
| tlv_type, |
| tlv_len); |
| |
| if (tlv_len == 0) /* something is malformed */ |
| continue; |
| |
| /* now check if we have a decoder otherwise do a hexdump at the end*/ |
| switch (tlv_type) { |
| case ISIS_TLV_AREA_ADDR: |
| if (!TTEST2(*tptr, 1)) |
| goto trunctlv; |
| alen = *tptr++; |
| while (tmp && alen < tmp) { |
| printf("\n\t Area address (length: %u): %s", |
| alen, |
| isonsap_string(tptr,alen)); |
| tptr += alen; |
| tmp -= alen + 1; |
| if (tmp==0) /* if this is the last area address do not attemt a boundary check */ |
| break; |
| if (!TTEST2(*tptr, 1)) |
| goto trunctlv; |
| alen = *tptr++; |
| } |
| break; |
| case ISIS_TLV_ISNEIGH: |
| while (tmp >= ETHER_ADDR_LEN) { |
| if (!TTEST2(*tptr, ETHER_ADDR_LEN)) |
| goto trunctlv; |
| printf("\n\t SNPA: %s",isis_print_id(tptr,ETHER_ADDR_LEN)); |
| tmp -= ETHER_ADDR_LEN; |
| tptr += ETHER_ADDR_LEN; |
| } |
| break; |
| |
| case ISIS_TLV_ISNEIGH_VARLEN: |
| if (!TTEST2(*tptr, 1) || tmp < 3) /* min. TLV length */ |
| goto trunctlv; |
| lan_alen = *tptr++; /* LAN address length */ |
| if (lan_alen == 0) { |
| printf("\n\t LAN address length 0 bytes (invalid)"); |
| break; |
| } |
| tmp --; |
| printf("\n\t LAN address length %u bytes ",lan_alen); |
| while (tmp >= lan_alen) { |
| if (!TTEST2(*tptr, lan_alen)) |
| goto trunctlv; |
| printf("\n\t\tIS Neighbor: %s",isis_print_id(tptr,lan_alen)); |
| tmp -= lan_alen; |
| tptr +=lan_alen; |
| } |
| break; |
| |
| case ISIS_TLV_PADDING: |
| break; |
| |
| case ISIS_TLV_MT_IS_REACH: |
| mt_len = isis_print_mtid(tptr, "\n\t "); |
| if (mt_len == 0) /* did something go wrong ? */ |
| goto trunctlv; |
| tptr+=mt_len; |
| tmp-=mt_len; |
| while (tmp >= 2+NODE_ID_LEN+3+1) { |
| ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); |
| if (ext_is_len == 0) /* did something go wrong ? */ |
| goto trunctlv; |
| |
| tmp-=ext_is_len; |
| tptr+=ext_is_len; |
| } |
| break; |
| |
| case ISIS_TLV_IS_ALIAS_ID: |
| while (tmp >= NODE_ID_LEN+1) { /* is it worth attempting a decode ? */ |
| ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); |
| if (ext_is_len == 0) /* did something go wrong ? */ |
| goto trunctlv; |
| tmp-=ext_is_len; |
| tptr+=ext_is_len; |
| } |
| break; |
| |
| case ISIS_TLV_EXT_IS_REACH: |
| while (tmp >= NODE_ID_LEN+3+1) { /* is it worth attempting a decode ? */ |
| ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); |
| if (ext_is_len == 0) /* did something go wrong ? */ |
| goto trunctlv; |
| tmp-=ext_is_len; |
| tptr+=ext_is_len; |
| } |
| break; |
| case ISIS_TLV_IS_REACH: |
| if (!TTEST2(*tptr,1)) /* check if there is one byte left to read out the virtual flag */ |
| goto trunctlv; |
| printf("\n\t %s", |
| tok2str(isis_is_reach_virtual_values, |
| "bogus virtual flag 0x%02x", |
| *tptr++)); |
| tlv_is_reach = (const struct isis_tlv_is_reach *)tptr; |
| while (tmp >= sizeof(struct isis_tlv_is_reach)) { |
| if (!TTEST(*tlv_is_reach)) |
| goto trunctlv; |
| printf("\n\t IS Neighbor: %s", |
| isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN)); |
| isis_print_metric_block(&tlv_is_reach->isis_metric_block); |
| tmp -= sizeof(struct isis_tlv_is_reach); |
| tlv_is_reach++; |
| } |
| break; |
| |
| case ISIS_TLV_ESNEIGH: |
| tlv_es_reach = (const struct isis_tlv_es_reach *)tptr; |
| while (tmp >= sizeof(struct isis_tlv_es_reach)) { |
| if (!TTEST(*tlv_es_reach)) |
| goto trunctlv; |
| printf("\n\t ES Neighbor: %s", |
| isis_print_id(tlv_es_reach->neighbor_sysid,SYSTEM_ID_LEN)); |
| isis_print_metric_block(&tlv_es_reach->isis_metric_block); |
| tmp -= sizeof(struct isis_tlv_es_reach); |
| tlv_es_reach++; |
| } |
| break; |
| |
| /* those two TLVs share the same format */ |
| case ISIS_TLV_INT_IP_REACH: |
| case ISIS_TLV_EXT_IP_REACH: |
| if (!isis_print_tlv_ip_reach(pptr, "\n\t ", tlv_len)) |
| return (1); |
| break; |
| |
| case ISIS_TLV_EXTD_IP_REACH: |
| while (tmp>0) { |
| ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET); |
| if (ext_ip_len == 0) /* did something go wrong ? */ |
| goto trunctlv; |
| tptr+=ext_ip_len; |
| tmp-=ext_ip_len; |
| } |
| break; |
| |
| case ISIS_TLV_MT_IP_REACH: |
| mt_len = isis_print_mtid(tptr, "\n\t "); |
| if (mt_len == 0) { /* did something go wrong ? */ |
| goto trunctlv; |
| } |
| tptr+=mt_len; |
| tmp-=mt_len; |
| |
| while (tmp>0) { |
| ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET); |
| if (ext_ip_len == 0) /* did something go wrong ? */ |
| goto trunctlv; |
| tptr+=ext_ip_len; |
| tmp-=ext_ip_len; |
| } |
| break; |
| |
| #ifdef INET6 |
| case ISIS_TLV_IP6_REACH: |
| while (tmp>0) { |
| ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET6); |
| if (ext_ip_len == 0) /* did something go wrong ? */ |
| goto trunctlv; |
| tptr+=ext_ip_len; |
| tmp-=ext_ip_len; |
| } |
| break; |
| |
| case ISIS_TLV_MT_IP6_REACH: |
| mt_len = isis_print_mtid(tptr, "\n\t "); |
| if (mt_len == 0) { /* did something go wrong ? */ |
| goto trunctlv; |
| } |
| tptr+=mt_len; |
| tmp-=mt_len; |
| |
| while (tmp>0) { |
| ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET6); |
| if (ext_ip_len == 0) /* did something go wrong ? */ |
| goto trunctlv; |
| tptr+=ext_ip_len; |
| tmp-=ext_ip_len; |
| } |
| break; |
| |
| case ISIS_TLV_IP6ADDR: |
| while (tmp>=sizeof(struct in6_addr)) { |
| if (!TTEST2(*tptr, sizeof(struct in6_addr))) |
| goto trunctlv; |
| |
| printf("\n\t IPv6 interface address: %s", |
| ip6addr_string(tptr)); |
| |
| tptr += sizeof(struct in6_addr); |
| tmp -= sizeof(struct in6_addr); |
| } |
| break; |
| #endif |
| case ISIS_TLV_AUTH: |
| if (!TTEST2(*tptr, 1)) |
| goto trunctlv; |
| |
| printf("\n\t %s: ", |
| tok2str(isis_subtlv_auth_values, |
| "unknown Authentication type 0x%02x", |
| *tptr)); |
| |
| switch (*tptr) { |
| case ISIS_SUBTLV_AUTH_SIMPLE: |
| for(i=1;i<tlv_len;i++) { |
| if (!TTEST2(*(tptr+i), 1)) |
| goto trunctlv; |
| printf("%c",*(tptr+i)); |
| } |
| break; |
| case ISIS_SUBTLV_AUTH_MD5: |
| for(i=1;i<tlv_len;i++) { |
| if (!TTEST2(*(tptr+i), 1)) |
| goto trunctlv; |
| printf("%02x",*(tptr+i)); |
| } |
| if (tlv_len != ISIS_SUBTLV_AUTH_MD5_LEN+1) |
| printf(", (malformed subTLV) "); |
| |
| #ifdef HAVE_LIBCRYPTO |
| sigcheck = signature_verify(optr, length, |
| (unsigned char *)tptr + 1); |
| #else |
| sigcheck = CANT_CHECK_SIGNATURE; |
| #endif |
| printf(" (%s)", tok2str(signature_check_values, "Unknown", sigcheck)); |
| |
| break; |
| case ISIS_SUBTLV_AUTH_GENERIC: |
| key_id = EXTRACT_16BITS((tptr+1)); |
| printf("%u, password: ", key_id); |
| for(i=1 + sizeof(u_int16_t);i<tlv_len;i++) { |
| if (!TTEST2(*(tptr+i), 1)) |
| goto trunctlv; |
| printf("%02x",*(tptr+i)); |
| } |
| break; |
| case ISIS_SUBTLV_AUTH_PRIVATE: |
| default: |
| if(!print_unknown_data(tptr+1,"\n\t\t ",tlv_len-1)) |
| return(0); |
| break; |
| } |
| break; |
| |
| case ISIS_TLV_PTP_ADJ: |
| tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr; |
| if(tmp>=1) { |
| if (!TTEST2(*tptr, 1)) |
| goto trunctlv; |
| printf("\n\t Adjacency State: %s (%u)", |
| tok2str(isis_ptp_adjancey_values, "unknown", *tptr), |
| *tptr); |
| tmp--; |
| } |
| if(tmp>sizeof(tlv_ptp_adj->extd_local_circuit_id)) { |
| if (!TTEST2(tlv_ptp_adj->extd_local_circuit_id, |
| sizeof(tlv_ptp_adj->extd_local_circuit_id))) |
| goto trunctlv; |
| printf("\n\t Extended Local circuit-ID: 0x%08x", |
| EXTRACT_32BITS(tlv_ptp_adj->extd_local_circuit_id)); |
| tmp-=sizeof(tlv_ptp_adj->extd_local_circuit_id); |
| } |
| if(tmp>=SYSTEM_ID_LEN) { |
| if (!TTEST2(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN)) |
| goto trunctlv; |
| printf("\n\t Neighbor System-ID: %s", |
| isis_print_id(tlv_ptp_adj->neighbor_sysid,SYSTEM_ID_LEN)); |
| tmp-=SYSTEM_ID_LEN; |
| } |
| if(tmp>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) { |
| if (!TTEST2(tlv_ptp_adj->neighbor_extd_local_circuit_id, |
| sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id))) |
| goto trunctlv; |
| printf("\n\t Neighbor Extended Local circuit-ID: 0x%08x", |
| EXTRACT_32BITS(tlv_ptp_adj->neighbor_extd_local_circuit_id)); |
| } |
| break; |
| |
| case ISIS_TLV_PROTOCOLS: |
| printf("\n\t NLPID(s): "); |
| while (tmp>0) { |
| if (!TTEST2(*(tptr), 1)) |
| goto trunctlv; |
| printf("%s (0x%02x)", |
| tok2str(nlpid_values, |
| "unknown", |
| *tptr), |
| *tptr); |
| if (tmp>1) /* further NPLIDs ? - put comma */ |
| printf(", "); |
| tptr++; |
| tmp--; |
| } |
| break; |
| |
| case ISIS_TLV_TE_ROUTER_ID: |
| if (!TTEST2(*pptr, sizeof(struct in_addr))) |
| goto trunctlv; |
| printf("\n\t Traffic Engineering Router ID: %s", ipaddr_string(pptr)); |
| break; |
| |
| case ISIS_TLV_IPADDR: |
| while (tmp>=sizeof(struct in_addr)) { |
| if (!TTEST2(*tptr, sizeof(struct in_addr))) |
| goto trunctlv; |
| printf("\n\t IPv4 interface address: %s", ipaddr_string(tptr)); |
| tptr += sizeof(struct in_addr); |
| tmp -= sizeof(struct in_addr); |
| } |
| break; |
| |
| case ISIS_TLV_HOSTNAME: |
| printf("\n\t Hostname: "); |
| while (tmp>0) { |
| if (!TTEST2(*tptr, 1)) |
| goto trunctlv; |
| printf("%c",*tptr++); |
| tmp--; |
| } |
| break; |
| |
| case ISIS_TLV_SHARED_RISK_GROUP: |
| if (tmp < NODE_ID_LEN) |
| break; |
| if (!TTEST2(*tptr, NODE_ID_LEN)) |
| goto trunctlv; |
| printf("\n\t IS Neighbor: %s", isis_print_id(tptr, NODE_ID_LEN)); |
| tptr+=(NODE_ID_LEN); |
| tmp-=(NODE_ID_LEN); |
| |
| if (tmp < 1) |
| break; |
| if (!TTEST2(*tptr, 1)) |
| goto trunctlv; |
| printf(", Flags: [%s]", ISIS_MASK_TLV_SHARED_RISK_GROUP(*tptr++) ? "numbered" : "unnumbered"); |
| tmp--; |
| |
| if (tmp < sizeof(struct in_addr)) |
| break; |
| if (!TTEST2(*tptr,sizeof(struct in_addr))) |
| goto trunctlv; |
| printf("\n\t IPv4 interface address: %s", ipaddr_string(tptr)); |
| tptr+=sizeof(struct in_addr); |
| tmp-=sizeof(struct in_addr); |
| |
| if (tmp < sizeof(struct in_addr)) |
| break; |
| if (!TTEST2(*tptr,sizeof(struct in_addr))) |
| goto trunctlv; |
| printf("\n\t IPv4 neighbor address: %s", ipaddr_string(tptr)); |
| tptr+=sizeof(struct in_addr); |
| tmp-=sizeof(struct in_addr); |
| |
| while (tmp>=4) { |
| if (!TTEST2(*tptr, 4)) |
| goto trunctlv; |
| printf("\n\t Link-ID: 0x%08x", EXTRACT_32BITS(tptr)); |
| tptr+=4; |
| tmp-=4; |
| } |
| break; |
| |
| case ISIS_TLV_LSP: |
| tlv_lsp = (const struct isis_tlv_lsp *)tptr; |
| while(tmp>=sizeof(struct isis_tlv_lsp)) { |
| if (!TTEST((tlv_lsp->lsp_id)[LSP_ID_LEN-1])) |
| goto trunctlv; |
| printf("\n\t lsp-id: %s", |
| isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN)); |
| if (!TTEST2(tlv_lsp->sequence_number, 4)) |
| goto trunctlv; |
| printf(", seq: 0x%08x",EXTRACT_32BITS(tlv_lsp->sequence_number)); |
| if (!TTEST2(tlv_lsp->remaining_lifetime, 2)) |
| goto trunctlv; |
| printf(", lifetime: %5ds",EXTRACT_16BITS(tlv_lsp->remaining_lifetime)); |
| if (!TTEST2(tlv_lsp->checksum, 2)) |
| goto trunctlv; |
| printf(", chksum: 0x%04x",EXTRACT_16BITS(tlv_lsp->checksum)); |
| tmp-=sizeof(struct isis_tlv_lsp); |
| tlv_lsp++; |
| } |
| break; |
| |
| case ISIS_TLV_CHECKSUM: |
| if (tmp < ISIS_TLV_CHECKSUM_MINLEN) |
| break; |
| if (!TTEST2(*tptr, ISIS_TLV_CHECKSUM_MINLEN)) |
| goto trunctlv; |
| printf("\n\t checksum: 0x%04x ", EXTRACT_16BITS(tptr)); |
| /* do not attempt to verify the checksum if it is zero |
| * most likely a HMAC-MD5 TLV is also present and |
| * to avoid conflicts the checksum TLV is zeroed. |
| * see rfc3358 for details |
| */ |
| osi_print_cksum(optr, EXTRACT_16BITS(tptr), tptr-optr, length); |
| break; |
| |
| case ISIS_TLV_MT_SUPPORTED: |
| if (tmp < ISIS_TLV_MT_SUPPORTED_MINLEN) |
| break; |
| while (tmp>1) { |
| /* length can only be a multiple of 2, otherwise there is |
| something broken -> so decode down until length is 1 */ |
| if (tmp!=1) { |
| mt_len = isis_print_mtid(tptr, "\n\t "); |
| if (mt_len == 0) /* did something go wrong ? */ |
| goto trunctlv; |
| tptr+=mt_len; |
| tmp-=mt_len; |
| } else { |
| printf("\n\t malformed MT-ID"); |
| break; |
| } |
| } |
| break; |
| |
| case ISIS_TLV_RESTART_SIGNALING: |
| /* first attempt to decode the flags */ |
| if (tmp < ISIS_TLV_RESTART_SIGNALING_FLAGLEN) |
| break; |
| if (!TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN)) |
| goto trunctlv; |
| printf("\n\t Flags [%s]", |
| bittok2str(isis_restart_flag_values, "none", *tptr)); |
| tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN; |
| tmp-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN; |
| |
| /* is there anything other than the flags field? */ |
| if (tmp == 0) |
| break; |
| |
| if (tmp < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN) |
| break; |
| if (!TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN)) |
| goto trunctlv; |
| |
| printf(", Remaining holding time %us", EXTRACT_16BITS(tptr)); |
| tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN; |
| tmp-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN; |
| |
| /* is there an additional sysid field present ?*/ |
| if (tmp == SYSTEM_ID_LEN) { |
| if (!TTEST2(*tptr, SYSTEM_ID_LEN)) |
| goto trunctlv; |
| printf(", for %s",isis_print_id(tptr,SYSTEM_ID_LEN)); |
| } |
| break; |
| |
| case ISIS_TLV_IDRP_INFO: |
| if (tmp < ISIS_TLV_IDRP_INFO_MINLEN) |
| break; |
| if (!TTEST2(*tptr, ISIS_TLV_IDRP_INFO_MINLEN)) |
| goto trunctlv; |
| printf("\n\t Inter-Domain Information Type: %s", |
| tok2str(isis_subtlv_idrp_values, |
| "Unknown (0x%02x)", |
| *tptr)); |
| switch (*tptr++) { |
| case ISIS_SUBTLV_IDRP_ASN: |
| if (!TTEST2(*tptr, 2)) /* fetch AS number */ |
| goto trunctlv; |
| printf("AS Number: %u",EXTRACT_16BITS(tptr)); |
| break; |
| case ISIS_SUBTLV_IDRP_LOCAL: |
| case ISIS_SUBTLV_IDRP_RES: |
| default: |
| if(!print_unknown_data(tptr,"\n\t ",tlv_len-1)) |
| return(0); |
| break; |
| } |
| break; |
| |
| case ISIS_TLV_LSP_BUFFERSIZE: |
| if (tmp < ISIS_TLV_LSP_BUFFERSIZE_MINLEN) |
| break; |
| if (!TTEST2(*tptr, ISIS_TLV_LSP_BUFFERSIZE_MINLEN)) |
| goto trunctlv; |
| printf("\n\t LSP Buffersize: %u",EXTRACT_16BITS(tptr)); |
| break; |
| |
| case ISIS_TLV_PART_DIS: |
| while (tmp >= SYSTEM_ID_LEN) { |
| if (!TTEST2(*tptr, SYSTEM_ID_LEN)) |
| goto trunctlv; |
| printf("\n\t %s",isis_print_id(tptr,SYSTEM_ID_LEN)); |
| tptr+=SYSTEM_ID_LEN; |
| tmp-=SYSTEM_ID_LEN; |
| } |
| break; |
| |
| case ISIS_TLV_PREFIX_NEIGH: |
| if (tmp < sizeof(struct isis_metric_block)) |
| break; |
| if (!TTEST2(*tptr, sizeof(struct isis_metric_block))) |
| goto trunctlv; |
| printf("\n\t Metric Block"); |
| isis_print_metric_block((const struct isis_metric_block *)tptr); |
| tptr+=sizeof(struct isis_metric_block); |
| tmp-=sizeof(struct isis_metric_block); |
| |
| while(tmp>0) { |
| if (!TTEST2(*tptr, 1)) |
| goto trunctlv; |
| prefix_len=*tptr++; /* read out prefix length in semioctets*/ |
| if (prefix_len < 2) { |
| printf("\n\t\tAddress: prefix length %u < 2", prefix_len); |
| break; |
| } |
| tmp--; |
| if (tmp < prefix_len/2) |
| break; |
| if (!TTEST2(*tptr, prefix_len/2)) |
| goto trunctlv; |
| printf("\n\t\tAddress: %s/%u", |
| isonsap_string(tptr,prefix_len/2), |
| prefix_len*4); |
| tptr+=prefix_len/2; |
| tmp-=prefix_len/2; |
| } |
| break; |
| |
| case ISIS_TLV_IIH_SEQNR: |
| if (tmp < ISIS_TLV_IIH_SEQNR_MINLEN) |
| break; |
| if (!TTEST2(*tptr, ISIS_TLV_IIH_SEQNR_MINLEN)) /* check if four bytes are on the wire */ |
| goto trunctlv; |
| printf("\n\t Sequence number: %u", EXTRACT_32BITS(tptr) ); |
| break; |
| |
| case ISIS_TLV_VENDOR_PRIVATE: |
| if (tmp < ISIS_TLV_VENDOR_PRIVATE_MINLEN) |
| break; |
| if (!TTEST2(*tptr, ISIS_TLV_VENDOR_PRIVATE_MINLEN)) /* check if enough byte for a full oui */ |
| goto trunctlv; |
| vendor_id = EXTRACT_24BITS(tptr); |
| printf("\n\t Vendor: %s (%u)", |
| tok2str(oui_values,"Unknown",vendor_id), |
| vendor_id); |
| tptr+=3; |
| tmp-=3; |
| if (tmp > 0) /* hexdump the rest */ |
| if(!print_unknown_data(tptr,"\n\t\t",tmp)) |
| return(0); |
| break; |
| /* |
| * FIXME those are the defined TLVs that lack a decoder |
| * you are welcome to contribute code ;-) |
| */ |
| |
| case ISIS_TLV_DECNET_PHASE4: |
| case ISIS_TLV_LUCENT_PRIVATE: |
| case ISIS_TLV_IPAUTH: |
| case ISIS_TLV_NORTEL_PRIVATE1: |
| case ISIS_TLV_NORTEL_PRIVATE2: |
| |
| default: |
| if (vflag <= 1) { |
| if(!print_unknown_data(pptr,"\n\t\t",tlv_len)) |
| return(0); |
| } |
| break; |
| } |
| /* do we want to see an additionally hexdump ? */ |
| if (vflag> 1) { |
| if(!print_unknown_data(pptr,"\n\t ",tlv_len)) |
| return(0); |
| } |
| |
| pptr += tlv_len; |
| packet_len -= tlv_len; |
| } |
| |
| if (packet_len != 0) { |
| printf("\n\t %u straggler bytes", packet_len); |
| } |
| return (1); |
| |
| trunc: |
| fputs("[|isis]", stdout); |
| return (1); |
| |
| trunctlv: |
| printf("\n\t\t packet exceeded snapshot"); |
| return(1); |
| } |
| |
| static void |
| osi_print_cksum (const u_int8_t *pptr, u_int16_t checksum, |
| u_int checksum_offset, u_int length) |
| { |
| u_int16_t calculated_checksum; |
| |
| /* do not attempt to verify the checksum if it is zero */ |
| if (!checksum) { |
| printf("(unverified)"); |
| } else { |
| calculated_checksum = create_osi_cksum(pptr, checksum_offset, length); |
| if (checksum == calculated_checksum) { |
| printf(" (correct)"); |
| } else { |
| printf(" (incorrect should be 0x%04x)", calculated_checksum); |
| } |
| } |
| } |
| |
| /* |
| * Local Variables: |
| * c-style: whitesmith |
| * c-basic-offset: 8 |
| * End: |
| */ |