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Diffstat (limited to 'contrib/tcpdump/print-isoclns.c')
| -rw-r--r-- | contrib/tcpdump/print-isoclns.c | 2735 |
1 files changed, 2735 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-isoclns.c b/contrib/tcpdump/print-isoclns.c new file mode 100644 index 0000000..fe06a9c --- /dev/null +++ b/contrib/tcpdump/print-isoclns.c @@ -0,0 +1,2735 @@ +/* + * 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. + * + * $FreeBSD$ + */ + +#ifndef lint +static const char rcsid[] _U_ = + "@(#) $Header: /tcpdump/master/tcpdump/print-isoclns.c,v 1.163 2007-03-02 09:16:19 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" + +/* + * 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_MD5 54 +#define ISIS_SUBTLV_AUTH_MD5_LEN 16 +#define ISIS_SUBTLV_AUTH_PRIVATE 255 + +static struct tok isis_subtlv_auth_values[] = { + { ISIS_SUBTLV_AUTH_SIMPLE, "simple text password"}, + { ISIS_SUBTLV_AUTH_MD5, "HMAC-MD5 password"}, + { ISIS_SUBTLV_AUTH_PRIVATE, "Routing Domain private password"}, + { 0, NULL } +}; + +#define ISIS_SUBTLV_IDRP_RES 0 +#define ISIS_SUBTLV_IDRP_LOCAL 1 +#define ISIS_SUBTLV_IDRP_ASN 2 + +static struct tok isis_subtlv_idrp_values[] = { + { ISIS_SUBTLV_IDRP_RES, "Reserved"}, + { ISIS_SUBTLV_IDRP_LOCAL, "Routing-Domain Specific"}, + { ISIS_SUBTLV_IDRP_ASN, "AS Number Tag"}, + { 0, NULL} +}; + +#define CLNP_SEGMENT_PART 0x80 +#define CLNP_MORE_SEGMENTS 0x40 +#define CLNP_REQUEST_ER 0x20 + +static struct tok clnp_flag_values[] = { + { CLNP_SEGMENT_PART, "Segmentation permitted"}, + { CLNP_MORE_SEGMENTS, "more Segments"}, + { CLNP_REQUEST_ER, "request Error Report"}, + { 0, NULL} +}; + +#define ISIS_MASK_LSP_OL_BIT(x) ((x)&0x4) +#define ISIS_MASK_LSP_ISTYPE_BITS(x) ((x)&0x3) +#define ISIS_MASK_LSP_PARTITION_BIT(x) ((x)&0x80) +#define ISIS_MASK_LSP_ATT_BITS(x) ((x)&0x78) +#define ISIS_MASK_LSP_ATT_ERROR_BIT(x) ((x)&0x40) +#define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) ((x)&0x20) +#define ISIS_MASK_LSP_ATT_DELAY_BIT(x) ((x)&0x10) +#define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) ((x)&0x8) + +#define ISIS_MASK_MTID(x) ((x)&0x0fff) +#define ISIS_MASK_MTFLAGS(x) ((x)&0xf000) + +static struct tok isis_mt_flag_values[] = { + { 0x4000, "sub-TLVs present"}, + { 0x8000, "ATT bit set"}, + { 0, NULL} +}; + +#define ISIS_MASK_TLV_EXTD_IP_UPDOWN(x) ((x)&0x80) +#define ISIS_MASK_TLV_EXTD_IP_SUBTLV(x) ((x)&0x40) + +#define ISIS_MASK_TLV_EXTD_IP6_IE(x) ((x)&0x40) +#define ISIS_MASK_TLV_EXTD_IP6_SUBTLV(x) ((x)&0x20) + +#define ISIS_LSP_TLV_METRIC_SUPPORTED(x) ((x)&0x80) +#define ISIS_LSP_TLV_METRIC_IE(x) ((x)&0x40) +#define ISIS_LSP_TLV_METRIC_UPDOWN(x) ((x)&0x80) +#define ISIS_LSP_TLV_METRIC_VALUE(x) ((x)&0x3f) + +#define ISIS_MASK_TLV_SHARED_RISK_GROUP(x) ((x)&0x1) + +static struct tok isis_mt_values[] = { + { 0, "IPv4 unicast"}, + { 1, "In-Band Management"}, + { 2, "IPv6 unicast"}, + { 3, "Multicast"}, + { 4095, "Development, Experimental or Proprietary"}, + { 0, NULL } +}; + +static struct tok isis_iih_circuit_type_values[] = { + { 1, "Level 1 only"}, + { 2, "Level 2 only"}, + { 3, "Level 1, Level 2"}, + { 0, NULL} +}; + +#define ISIS_LSP_TYPE_UNUSED0 0 +#define ISIS_LSP_TYPE_LEVEL_1 1 +#define ISIS_LSP_TYPE_UNUSED2 2 +#define ISIS_LSP_TYPE_LEVEL_2 3 + +static struct tok isis_lsp_istype_values[] = { + { ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"}, + { ISIS_LSP_TYPE_LEVEL_1, "L1 IS"}, + { ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"}, + { ISIS_LSP_TYPE_LEVEL_2, "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) +{ + const struct isis_common_header *header; + + header = (const struct isis_common_header *)p; + + if (caplen <= 1) { /* enough bytes on the wire ? */ + printf("|OSI"); + return; + } + + if (eflag) + printf("OSI NLPID %s (0x%02x): ", + tok2str(nlpid_values,"Unknown",*p), + *p); + + switch (*p) { + + case NLPID_CLNP: + if (!clnp_print(p, length)) + print_unknown_data(p,"\n\t",caplen); + break; + + case NLPID_ESIS: + esis_print(p, length); + return; + + case NLPID_ISIS: + if (!isis_print(p, length)) + print_unknown_data(p,"\n\t",caplen); + break; + + case NLPID_NULLNS: + (void)printf("%slength: %u", + eflag ? "" : ", ", + length); + break; + + case NLPID_Q933: + q933_print(p+1, length-1); + break; + + case NLPID_IP: + ip_print(gndo, p+1, length-1); + break; + +#ifdef INET6 + case NLPID_IP6: + ip6_print(p+1, length-1); + break; +#endif + + case NLPID_PPP: + ppp_print(p+1, length-1); + break; + + default: + if (!eflag) + printf("OSI NLPID 0x%02x unknown",*p); + (void)printf("%slength: %u", + eflag ? "" : ", ", + length); + if (caplen > 1) + print_unknown_data(p,"\n\t",caplen); + break; + } +} + +#define CLNP_PDU_ER 1 +#define CLNP_PDU_DT 28 +#define CLNP_PDU_MD 29 +#define CLNP_PDU_ERQ 30 +#define CLNP_PDU_ERP 31 + +static struct tok clnp_pdu_values[] = { + { CLNP_PDU_ER, "Error Report"}, + { CLNP_PDU_MD, "MD"}, + { CLNP_PDU_DT, "Data"}, + { CLNP_PDU_ERQ, "Echo Request"}, + { CLNP_PDU_ERP, "Echo Response"}, + { 0, NULL } +}; + +struct clnp_header_t { + u_int8_t nlpid; + u_int8_t length_indicator; + u_int8_t version; + u_int8_t lifetime; /* units of 500ms */ + u_int8_t type; + u_int8_t segment_length[2]; + u_int8_t cksum[2]; +}; + +struct clnp_segment_header_t { + u_int8_t data_unit_id[2]; + u_int8_t segment_offset[2]; + u_int8_t total_length[2]; +}; + +/* + * clnp_print + * Decode CLNP packets. Return 0 on error. + */ + +static int clnp_print (const u_int8_t *pptr, u_int length) +{ + const u_int8_t *optr,*source_address,*dest_address; + u_int li,tlen,nsap_offset,source_address_length,dest_address_length, clnp_pdu_type, clnp_flags; + const struct clnp_header_t *clnp_header; + const struct clnp_segment_header_t *clnp_segment_header; + u_int8_t rfd_error_major,rfd_error_minor; + + clnp_header = (const struct clnp_header_t *) pptr; + TCHECK(*clnp_header); + + li = clnp_header->length_indicator; + optr = pptr; + + if (!eflag) + printf("CLNP"); + + /* + * Sanity checking of the header. + */ + + if (clnp_header->version != CLNP_VERSION) { + printf("version %d packet not supported", clnp_header->version); + return (0); + } + + /* FIXME further header sanity checking */ + + clnp_pdu_type = clnp_header->type & CLNP_PDU_TYPE_MASK; + clnp_flags = clnp_header->type & CLNP_FLAG_MASK; + + pptr += sizeof(struct clnp_header_t); + li -= sizeof(struct clnp_header_t); + dest_address_length = *pptr; + dest_address = pptr + 1; + + pptr += (1 + dest_address_length); + li -= (1 + dest_address_length); + source_address_length = *pptr; + source_address = pptr +1; + + pptr += (1 + source_address_length); + li -= (1 + source_address_length); + + if (vflag < 1) { + printf("%s%s > %s, %s, length %u", + eflag ? "" : ", ", + isonsap_string(source_address, source_address_length), + isonsap_string(dest_address, dest_address_length), + tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type), + length); + return (1); + } + printf("%slength %u",eflag ? "" : ", ",length); + + printf("\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, Segment PDU length: %u, checksum: 0x%04x", + tok2str(clnp_pdu_values, "unknown (%u)",clnp_pdu_type), + clnp_header->length_indicator, + clnp_header->version, + clnp_header->lifetime/2, + (clnp_header->lifetime%2)*5, + EXTRACT_16BITS(clnp_header->segment_length), + EXTRACT_16BITS(clnp_header->cksum)); + + 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 >= 2) { + u_int op, opli; + const u_int8_t *tptr; + + TCHECK2(*pptr, 2); + if (li < 2) { + printf(", bad opts/li"); + return; + } + op = *pptr++; + opli = *pptr++; + li -= 2; + if (opli > li) { + printf(", opt (%d) too long", op); + return; + } + li -= opli; + tptr = pptr; + + printf("\n\t %s Option #%u, length %u, value: ", + tok2str(esis_option_values,"Unknown",op), + op, + opli); + + switch (op) { + + case ESIS_OPTION_ES_CONF_TIME: + TCHECK2(*pptr, 2); + printf("%us", EXTRACT_16BITS(tptr)); + break; + + case ESIS_OPTION_PROTOCOLS: + while (opli>0) { + TCHECK(*pptr); + printf("%s (0x%02x)", + tok2str(nlpid_values, + "unknown", + *tptr), + *tptr); + if (opli>1) /* further NPLIDs ? - put comma */ + printf(", "); + tptr++; + opli--; + } + break; + + /* + * FIXME those are the defined Options that lack a decoder + * you are welcome to contribute code ;-) + */ + + case ESIS_OPTION_QOS_MAINTENANCE: + case ESIS_OPTION_SECURITY: + case ESIS_OPTION_PRIORITY: + case ESIS_OPTION_ADDRESS_MASK: + case ESIS_OPTION_SNPA_MASK: + + default: + print_unknown_data(tptr,"\n\t ",opli); + break; + } + if (vflag > 1) + print_unknown_data(pptr,"\n\t ",opli); + pptr += opli; + } +trunc: + return; +} + +/* shared routine for printing system, node and lsp-ids */ +static char * +isis_print_id(const u_int8_t *cp, int id_len) +{ + int i; + static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")]; + char *pos = id; + + for (i = 1; i <= SYSTEM_ID_LEN; i++) { + snprintf(pos, sizeof(id) - (pos - id), "%02x", *cp++); + pos += strlen(pos); + if (i == 2 || i == 4) + *pos++ = '.'; + } + if (id_len >= NODE_ID_LEN) { + snprintf(pos, sizeof(id) - (pos - id), ".%02x", *cp++); + pos += strlen(pos); + } + if (id_len == LSP_ID_LEN) + snprintf(pos, sizeof(id) - (pos - id), "-%02x", *cp); + return (id); +} + +/* print the 4-byte metric block which is common found in the old-style TLVs */ +static int +isis_print_metric_block (const struct isis_metric_block *isis_metric_block) +{ + printf(", Default Metric: %d, %s", + ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default), + ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal"); + if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay)) + printf("\n\t\t Delay Metric: %d, %s", + ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay), + ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal"); + if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense)) + printf("\n\t\t Expense Metric: %d, %s", + ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense), + ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal"); + if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error)) + printf("\n\t\t Error Metric: %d, %s", + ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error), + ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal"); + + return(1); /* everything is ok */ +} + +static int +isis_print_tlv_ip_reach (const u_int8_t *cp, const char *ident, int length) +{ + int prefix_len; + const struct isis_tlv_ip_reach *tlv_ip_reach; + + tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp; + + while (length > 0) { + if ((size_t)length < sizeof(*tlv_ip_reach)) { + printf("short IPv4 Reachability (%d vs %lu)", + length, + (unsigned long)sizeof(*tlv_ip_reach)); + return (0); + } + + if (!TTEST(*tlv_ip_reach)) + return (0); + + prefix_len = mask2plen(EXTRACT_32BITS(tlv_ip_reach->mask)); + + if (prefix_len == -1) + printf("%sIPv4 prefix: %s mask %s", + ident, + ipaddr_string((tlv_ip_reach->prefix)), + ipaddr_string((tlv_ip_reach->mask))); + else + printf("%sIPv4 prefix: %15s/%u", + ident, + ipaddr_string((tlv_ip_reach->prefix)), + prefix_len); + + printf(", Distribution: %s, Metric: %u, %s", + ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up", + ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default), + ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal"); + + if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay)) + printf("%s Delay Metric: %u, %s", + ident, + ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay), + ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal"); + + if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense)) + printf("%s Expense Metric: %u, %s", + ident, + ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense), + ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal"); + + if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error)) + printf("%s Error Metric: %u, %s", + ident, + ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error), + ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal"); + + length -= sizeof(struct isis_tlv_ip_reach); + tlv_ip_reach++; + } + return (1); +} + +/* + * this is the common IP-REACH subTLV decoder it is called + * from various EXTD-IP REACH TLVs (135,235,236,237) + */ + +static int +isis_print_ip_reach_subtlv (const u_int8_t *tptr,int subt,int subl,const char *ident) { + + /* first lets see if we know the subTLVs name*/ + printf("%s%s subTLV #%u, length: %u", + ident, + tok2str(isis_ext_ip_reach_subtlv_values, + "unknown", + subt), + subt, + subl); + + if (!TTEST2(*tptr,subl)) + goto trunctlv; + + switch(subt) { + case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */ + case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32: + while (subl >= 4) { + printf(", 0x%08x (=%u)", + EXTRACT_32BITS(tptr), + EXTRACT_32BITS(tptr)); + tptr+=4; + subl-=4; + } + break; + case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64: + while (subl >= 8) { + printf(", 0x%08x%08x", + EXTRACT_32BITS(tptr), + EXTRACT_32BITS(tptr+4)); + tptr+=8; + subl-=8; + } + break; + default: + if(!print_unknown_data(tptr,"\n\t\t ", + subl)) + return(0); + break; + } + return(1); + +trunctlv: + printf("%spacket exceeded snapshot",ident); + return(0); +} + +/* + * this is the common IS-REACH subTLV decoder it is called + * from isis_print_ext_is_reach() + */ + +static int +isis_print_is_reach_subtlv (const u_int8_t *tptr,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; + const struct isis_lsp_header *header_lsp; + const struct isis_csnp_header *header_csnp; + const struct isis_psnp_header *header_psnp; + + const struct isis_tlv_lsp *tlv_lsp; + const struct isis_tlv_ptp_adj *tlv_ptp_adj; + const struct isis_tlv_is_reach *tlv_is_reach; + const struct isis_tlv_es_reach *tlv_es_reach; + + u_int8_t pdu_type, max_area, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len; + u_int8_t ext_is_len, ext_ip_len, mt_len; + const u_int8_t *optr, *pptr, *tptr; + u_short packet_len,pdu_len; + u_int i,vendor_id; + + packet_len=length; + optr = p; /* initialize the _o_riginal pointer to the packet start - + need it for parsing the checksum TLV */ + isis_header = (const struct isis_common_header *)p; + TCHECK(*isis_header); + pptr = p+(ISIS_COMMON_HEADER_SIZE); + header_iih_lan = (const struct isis_iih_lan_header *)pptr; + header_iih_ptp = (const struct isis_iih_ptp_header *)pptr; + header_lsp = (const struct isis_lsp_header *)pptr; + header_csnp = (const struct isis_csnp_header *)pptr; + header_psnp = (const struct isis_psnp_header *)pptr; + + if (!eflag) + printf("IS-IS"); + + /* + * Sanity checking of the header. + */ + + if (isis_header->version != ISIS_VERSION) { + printf("version %d packet not supported", isis_header->version); + return (0); + } + + if ((isis_header->id_length != SYSTEM_ID_LEN) && (isis_header->id_length != 0)) { + printf("system ID length of %d is not supported", + isis_header->id_length); + return (0); + } + + if (isis_header->pdu_version != ISIS_VERSION) { + printf("version %d packet not supported", isis_header->pdu_version); + return (0); + } + + max_area = isis_header->max_area; + switch(max_area) { + case 0: + max_area = 3; /* silly shit */ + break; + case 255: + printf("bad packet -- 255 areas"); + return (0); + default: + break; + } + + id_length = isis_header->id_length; + switch(id_length) { + case 0: + id_length = 6; /* silly shit again */ + break; + case 1: /* 1-8 are valid sys-ID lenghts */ + case 2: + case 3: + case 4: + case 5: + case 6: + case 7: + case 8: + break; + case 255: + id_length = 0; /* entirely useless */ + break; + default: + break; + } + + /* toss any non 6-byte sys-ID len PDUs */ + if (id_length != 6 ) { + printf("bad packet -- illegal sys-ID length (%u)", id_length); + return (0); + } + + pdu_type=isis_header->pdu_type; + + /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/ + if (vflag < 1) { + printf("%s%s", + eflag ? "" : ", ", + tok2str(isis_pdu_values,"unknown PDU-Type %u",pdu_type)); + + switch (pdu_type) { + + case ISIS_PDU_L1_LAN_IIH: + case ISIS_PDU_L2_LAN_IIH: + printf(", src-id %s", + isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN)); + printf(", lan-id %s, prio %u", + isis_print_id(header_iih_lan->lan_id,NODE_ID_LEN), + header_iih_lan->priority); + break; + case ISIS_PDU_PTP_IIH: + printf(", src-id %s", isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN)); + break; + case ISIS_PDU_L1_LSP: + case ISIS_PDU_L2_LSP: + printf(", lsp-id %s, seq 0x%08x, lifetime %5us", + isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), + EXTRACT_32BITS(header_lsp->sequence_number), + EXTRACT_16BITS(header_lsp->remaining_lifetime)); + break; + case ISIS_PDU_L1_CSNP: + case ISIS_PDU_L2_CSNP: + printf(", src-id %s", isis_print_id(header_csnp->source_id,NODE_ID_LEN)); + break; + case ISIS_PDU_L1_PSNP: + case ISIS_PDU_L2_PSNP: + printf(", src-id %s", isis_print_id(header_psnp->source_id,NODE_ID_LEN)); + break; + + } + printf(", length %u", length); + + return(1); + } + + /* ok they seem to want to know everything - lets fully decode it */ + printf("%slength %u", eflag ? "" : ", ",length); + + printf("\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)", + tok2str(isis_pdu_values, + "unknown, type %u", + pdu_type), + isis_header->fixed_len, + isis_header->version, + isis_header->pdu_version, + id_length, + isis_header->id_length, + max_area, + isis_header->max_area); + + if (vflag > 1) { + if(!print_unknown_data(optr,"\n\t",8)) /* provide the _o_riginal pointer */ + return(0); /* for optionally debugging the common header */ + } + + switch (pdu_type) { + + case ISIS_PDU_L1_LAN_IIH: + case ISIS_PDU_L2_LAN_IIH: + if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) { + printf(", bogus fixed header length %u should be %lu", + isis_header->fixed_len, (unsigned long)ISIS_IIH_LAN_HEADER_SIZE); + return (0); + } + + pdu_len=EXTRACT_16BITS(header_iih_lan->pdu_len); + if (packet_len>pdu_len) { + packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ + length=pdu_len; + } + + TCHECK(*header_iih_lan); + printf("\n\t source-id: %s, holding time: %us, Flags: [%s]", + isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN), + EXTRACT_16BITS(header_iih_lan->holding_time), + tok2str(isis_iih_circuit_type_values, + "unknown circuit type 0x%02x", + header_iih_lan->circuit_type)); + + printf("\n\t lan-id: %s, Priority: %u, PDU length: %u", + isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN), + (header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK, + pdu_len); + + if (vflag > 1) { + if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_LAN_HEADER_SIZE)) + return(0); + } + + packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE); + pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE); + break; + + case ISIS_PDU_PTP_IIH: + if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) { + printf(", bogus fixed header length %u should be %lu", + isis_header->fixed_len, (unsigned long)ISIS_IIH_PTP_HEADER_SIZE); + return (0); + } + + pdu_len=EXTRACT_16BITS(header_iih_ptp->pdu_len); + if (packet_len>pdu_len) { + packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ + length=pdu_len; + } + + TCHECK(*header_iih_ptp); + printf("\n\t source-id: %s, holding time: %us, Flags: [%s]", + isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN), + EXTRACT_16BITS(header_iih_ptp->holding_time), + tok2str(isis_iih_circuit_type_values, + "unknown circuit type 0x%02x", + header_iih_ptp->circuit_type)); + + printf("\n\t circuit-id: 0x%02x, PDU length: %u", + header_iih_ptp->circuit_id, + pdu_len); + + if (vflag > 1) { + if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_PTP_HEADER_SIZE)) + return(0); + } + + packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE); + pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE); + break; + + case ISIS_PDU_L1_LSP: + case ISIS_PDU_L2_LSP: + if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) { + printf(", bogus fixed header length %u should be %lu", + isis_header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE); + return (0); + } + + pdu_len=EXTRACT_16BITS(header_lsp->pdu_len); + if (packet_len>pdu_len) { + packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ + length=pdu_len; + } + + TCHECK(*header_lsp); + printf("\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x", + isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), + EXTRACT_32BITS(header_lsp->sequence_number), + EXTRACT_16BITS(header_lsp->remaining_lifetime), + EXTRACT_16BITS(header_lsp->checksum)); + + + osi_print_cksum((u_int8_t *)header_lsp->lsp_id, + EXTRACT_16BITS(header_lsp->checksum), 12, length-12); + + 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: + while (tmp >= 2+NODE_ID_LEN+3+1) { + mt_len = isis_print_mtid(tptr, "\n\t "); + if (mt_len == 0) /* did something go wrong ? */ + goto trunctlv; + tptr+=mt_len; + tmp-=mt_len; + + ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); + if (ext_is_len == 0) /* did something go wrong ? */ + goto trunctlv; + + tmp-=ext_is_len; + tptr+=ext_is_len; + } + break; + + case ISIS_TLV_IS_ALIAS_ID: + while (tmp >= NODE_ID_LEN+1) { /* is it worth attempting a decode ? */ + ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); + if (ext_is_len == 0) /* did something go wrong ? */ + goto trunctlv; + tmp-=ext_is_len; + tptr+=ext_is_len; + } + break; + + case ISIS_TLV_EXT_IS_REACH: + while (tmp >= NODE_ID_LEN+3+1) { /* is it worth attempting a decode ? */ + ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); + if (ext_is_len == 0) /* did something go wrong ? */ + goto trunctlv; + tmp-=ext_is_len; + tptr+=ext_is_len; + } + break; + case ISIS_TLV_IS_REACH: + if (!TTEST2(*tptr,1)) /* check if there is one byte left to read out the virtual flag */ + goto trunctlv; + printf("\n\t %s", + tok2str(isis_is_reach_virtual_values, + "bogus virtual flag 0x%02x", + *tptr++)); + tlv_is_reach = (const struct isis_tlv_is_reach *)tptr; + while (tmp >= sizeof(struct isis_tlv_is_reach)) { + if (!TTEST(*tlv_is_reach)) + goto trunctlv; + printf("\n\t IS Neighbor: %s", + isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN)); + isis_print_metric_block(&tlv_is_reach->isis_metric_block); + tmp -= sizeof(struct isis_tlv_is_reach); + tlv_is_reach++; + } + break; + + case ISIS_TLV_ESNEIGH: + tlv_es_reach = (const struct isis_tlv_es_reach *)tptr; + while (tmp >= sizeof(struct isis_tlv_es_reach)) { + if (!TTEST(*tlv_es_reach)) + goto trunctlv; + printf("\n\t ES Neighbor: %s", + isis_print_id(tlv_es_reach->neighbor_sysid,SYSTEM_ID_LEN)); + isis_print_metric_block(&tlv_es_reach->isis_metric_block); + tmp -= sizeof(struct isis_tlv_es_reach); + tlv_es_reach++; + } + break; + + /* those two TLVs share the same format */ + case ISIS_TLV_INT_IP_REACH: + case ISIS_TLV_EXT_IP_REACH: + if (!isis_print_tlv_ip_reach(pptr, "\n\t ", tlv_len)) + return (1); + break; + + case ISIS_TLV_EXTD_IP_REACH: + while (tmp>0) { + ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", 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) "); + 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: + */ |
