X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/ccf20e144895d1aa09bd003b9d44f15ec2a7f424..0845bc813c1cc48b18cdefff0b387c110647463c:/print-isoclns.c diff --git a/print-isoclns.c b/print-isoclns.c index 9d3ff0f4..b1b4e215 100644 --- a/print-isoclns.c +++ b/print-isoclns.c @@ -21,69 +21,64 @@ * Original code by Matt Thomas, Digital Equipment Corporation * * Extensively modified by Hannes Gredler (hannes@juniper.net) for more - * complete IS-IS support. + * complete IS-IS & CLNP support. */ -#ifndef lint -static const char rcsid[] = - "@(#) $Header: /tcpdump/master/tcpdump/print-isoclns.c,v 1.48 2002-05-25 15:11:37 hannes Exp $ (LBL)"; -#endif - #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include -#include -#include +#include -#include - -#include #include -#include "interface.h" +#include "netdissect.h" #include "addrtoname.h" -#include "ethertype.h" #include "ether.h" +#include "nlpid.h" #include "extract.h" - -#define NLPID_CLNS 129 /* 0x81 */ -#define NLPID_ESIS 130 /* 0x82 */ -#define NLPID_ISIS 131 /* 0x83 */ -#define NLPID_IP6 0x8e -#define NLPID_IP 0xcc -#define NLPID_NULLNS 0 +#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 PDU_TYPE_MASK 0x1F -#define PRIORITY_MASK 0x7F - -#define L1_LAN_IIH 15 -#define L2_LAN_IIH 16 -#define PTP_IIH 17 -#define L1_LSP 18 -#define L2_LSP 20 -#define L1_CSNP 24 -#define L2_CSNP 25 -#define L1_PSNP 26 -#define L2_PSNP 27 - -static struct tok isis_pdu_values[] = { - { L1_LAN_IIH, "L1 Lan IIH"}, - { L2_LAN_IIH, "L2 Lan IIH"}, - { PTP_IIH, "p2p IIH"}, - { L1_LSP, "L1 LSP"}, - { L2_LSP, "L2 LSP"}, - { L1_CSNP, "L1 CSNP"}, - { L2_CSNP, "L2 CSNP"}, - { L1_PSNP, "L1 PSNP"}, - { L2_PSNP, "L2 PSNP"}, +#define ESIS_VERSION 1 +#define CLNP_VERSION 1 + +#define ISIS_PDU_TYPE_MASK 0x1F +#define ESIS_PDU_TYPE_MASK 0x1F +#define CLNP_PDU_TYPE_MASK 0x1F +#define CLNP_FLAG_MASK 0xE0 +#define ISIS_LAN_PRIORITY_MASK 0x7F + +#define ISIS_PDU_L1_LAN_IIH 15 +#define ISIS_PDU_L2_LAN_IIH 16 +#define ISIS_PDU_PTP_IIH 17 +#define ISIS_PDU_L1_LSP 18 +#define ISIS_PDU_L2_LSP 20 +#define ISIS_PDU_L1_CSNP 24 +#define ISIS_PDU_L2_CSNP 25 +#define ISIS_PDU_L1_PSNP 26 +#define ISIS_PDU_L2_PSNP 27 + +static const struct tok isis_pdu_values[] = { + { ISIS_PDU_L1_LAN_IIH, "L1 Lan IIH"}, + { ISIS_PDU_L2_LAN_IIH, "L2 Lan IIH"}, + { ISIS_PDU_PTP_IIH, "p2p IIH"}, + { ISIS_PDU_L1_LSP, "L1 LSP"}, + { ISIS_PDU_L2_LSP, "L2 LSP"}, + { ISIS_PDU_L1_CSNP, "L1 CSNP"}, + { ISIS_PDU_L2_CSNP, "L2 CSNP"}, + { ISIS_PDU_L1_PSNP, "L1 PSNP"}, + { ISIS_PDU_L2_PSNP, "L2 PSNP"}, { 0, NULL} }; @@ -92,123 +87,395 @@ static struct tok isis_pdu_values[] = { * encoding information in all sorts of places. This is an enumeration of * the well known types. * - * list taken from draft-ietf-isis-wg-tlv-codepoints-01.txt + * list taken from rfc3359 plus some memory from veterans ;-) */ -#define TLV_AREA_ADDR 1 -#define TLV_IS_REACH 2 -#define TLV_ESNEIGH 3 -#define TLV_PART_DIS 4 -#define TLV_SUMMARY 5 -#define TLV_ISNEIGH 6 -#define TLV_PADDING 8 -#define TLV_LSP 9 -#define TLV_AUTH 10 -#define TLV_CHECKSUM 12 -#define TLV_LSP_BUFFERSIZE 14 -#define TLV_EXT_IS_REACH 22 -#define TLV_IS_ALIAS_ID 24 -#define TLV_DECNET_PHASE4 42 -#define TLV_LUCENT_PRIVATE 66 -#define TLV_IP_REACH 128 -#define TLV_PROTOCOLS 129 -#define TLV_IP_REACH_EXT 130 -#define TLV_IDRP_INFO 131 -#define TLV_IPADDR 132 -#define TLV_IPAUTH 133 -#define TLV_TE_ROUTER_ID 134 -#define TLV_EXT_IP_REACH 135 -#define TLV_HOSTNAME 137 -#define TLV_SHARED_RISK_GROUP 138 -#define TLV_NORTEL_PRIVATE1 176 -#define TLV_NORTEL_PRIVATE2 177 -#define TLV_RESTART_SIGNALING 211 -#define TLV_MT_IS_REACH 222 -#define TLV_MT_SUPPORTED 229 -#define TLV_IP6ADDR 232 -#define TLV_MT_IP_REACH 235 -#define TLV_IP6_REACH 236 -#define TLV_MT_IP6_REACH 237 -#define TLV_PTP_ADJ 240 - -static struct tok isis_tlv_values[] = { - { TLV_AREA_ADDR, "Area address(es)"}, - { TLV_IS_REACH, "IS Reachability"}, - { TLV_ESNEIGH, "IS Neighbor(s)"}, - { TLV_PART_DIS, "Partition DIS"}, - { TLV_SUMMARY, "Prefix Neighbors"}, - { TLV_ISNEIGH, "IS Neighbor(s)"}, - { TLV_PADDING, "Padding"}, - { TLV_LSP, "LSP entries"}, - { TLV_AUTH, "Authentication"}, - { TLV_CHECKSUM, "Checksum"}, - { TLV_LSP_BUFFERSIZE, "LSP Buffersize"}, - { TLV_EXT_IS_REACH, "Extended IS Reachability"}, - { TLV_IS_ALIAS_ID, "IS Alias ID"}, - { TLV_DECNET_PHASE4, "DECnet Phase IV"}, - { TLV_LUCENT_PRIVATE, "Lucent Proprietary"}, - { TLV_IP_REACH, "IPv4 Internal reachability"}, - { TLV_PROTOCOLS, "Protocols supported"}, - { TLV_IP_REACH_EXT, "IPv4 External reachability"}, - { TLV_IDRP_INFO, "Inter-Domain Information Type"}, - { TLV_IPADDR, "IPv4 Interface address(es)"}, - { TLV_IPAUTH, "IPv4 authentication (deprecated)"}, - { TLV_TE_ROUTER_ID, "Traffic Engineering Router ID"}, - { TLV_EXT_IP_REACH, "Extended IPv4 reachability"}, - { TLV_HOSTNAME, "Hostname"}, - { TLV_SHARED_RISK_GROUP, "Shared Risk Link Group"}, - { TLV_NORTEL_PRIVATE1, "Nortel Proprietary"}, - { TLV_NORTEL_PRIVATE2, "Nortel Proprietary"}, - { TLV_RESTART_SIGNALING, "Restart Signaling"}, - { TLV_MT_IS_REACH, "Multi Topology IS Reachability"}, - { TLV_MT_SUPPORTED, "Multi Topology"}, - { TLV_IP6ADDR, "IPv6 Interface address(es)"}, - { TLV_MT_IP_REACH, "Multi-Topology IPv4 reachability"}, - { TLV_IP6_REACH, "IPv6 reachability"}, - { TLV_MT_IP6_REACH, "Multi-Topology IP6 reachability"}, - { TLV_PTP_ADJ, "Point-to-point Adjacency State"}, +#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_POI 13 /* rfc6232 */ +#define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */ +#define ISIS_TLV_LSP_BUFFERSIZE_MINLEN 2 +#define ISIS_TLV_EXT_IS_REACH 22 /* draft-ietf-isis-traffic-05 */ +#define ISIS_TLV_IS_ALIAS_ID 24 /* draft-ietf-isis-ext-lsp-frags-02 */ +#define ISIS_TLV_DECNET_PHASE4 42 +#define ISIS_TLV_LUCENT_PRIVATE 66 +#define ISIS_TLV_INT_IP_REACH 128 /* rfc1195, rfc2966 */ +#define ISIS_TLV_PROTOCOLS 129 /* rfc1195 */ +#define ISIS_TLV_EXT_IP_REACH 130 /* rfc1195, rfc2966 */ +#define ISIS_TLV_IDRP_INFO 131 /* rfc1195 */ +#define ISIS_TLV_IDRP_INFO_MINLEN 1 +#define ISIS_TLV_IPADDR 132 /* rfc1195 */ +#define ISIS_TLV_IPAUTH 133 /* rfc1195 */ +#define ISIS_TLV_TE_ROUTER_ID 134 /* draft-ietf-isis-traffic-05 */ +#define ISIS_TLV_EXTD_IP_REACH 135 /* draft-ietf-isis-traffic-05 */ +#define ISIS_TLV_HOSTNAME 137 /* rfc2763 */ +#define ISIS_TLV_SHARED_RISK_GROUP 138 /* draft-ietf-isis-gmpls-extensions */ +#define ISIS_TLV_MT_PORT_CAP 143 /* rfc6165 */ +#define ISIS_TLV_MT_CAPABILITY 144 /* rfc6329 */ +#define ISIS_TLV_NORTEL_PRIVATE1 176 +#define ISIS_TLV_NORTEL_PRIVATE2 177 +#define ISIS_TLV_RESTART_SIGNALING 211 /* rfc3847 */ +#define ISIS_TLV_RESTART_SIGNALING_FLAGLEN 1 +#define ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN 2 +#define ISIS_TLV_MT_IS_REACH 222 /* draft-ietf-isis-wg-multi-topology-05 */ +#define ISIS_TLV_MT_SUPPORTED 229 /* draft-ietf-isis-wg-multi-topology-05 */ +#define ISIS_TLV_MT_SUPPORTED_MINLEN 2 +#define ISIS_TLV_IP6ADDR 232 /* draft-ietf-isis-ipv6-02 */ +#define ISIS_TLV_MT_IP_REACH 235 /* draft-ietf-isis-wg-multi-topology-05 */ +#define ISIS_TLV_IP6_REACH 236 /* draft-ietf-isis-ipv6-02 */ +#define ISIS_TLV_MT_IP6_REACH 237 /* draft-ietf-isis-wg-multi-topology-05 */ +#define ISIS_TLV_PTP_ADJ 240 /* rfc3373 */ +#define ISIS_TLV_IIH_SEQNR 241 /* draft-shen-isis-iih-sequence-00 */ +#define ISIS_TLV_IIH_SEQNR_MINLEN 4 +#define ISIS_TLV_VENDOR_PRIVATE 250 /* draft-ietf-isis-experimental-tlv-01 */ +#define ISIS_TLV_VENDOR_PRIVATE_MINLEN 3 + +static const struct tok isis_tlv_values[] = { + { ISIS_TLV_AREA_ADDR, "Area address(es)"}, + { ISIS_TLV_IS_REACH, "IS Reachability"}, + { ISIS_TLV_ESNEIGH, "ES Neighbor(s)"}, + { ISIS_TLV_PART_DIS, "Partition DIS"}, + { ISIS_TLV_PREFIX_NEIGH, "Prefix Neighbors"}, + { ISIS_TLV_ISNEIGH, "IS Neighbor(s)"}, + { ISIS_TLV_ISNEIGH_VARLEN, "IS Neighbor(s) (variable length)"}, + { ISIS_TLV_PADDING, "Padding"}, + { ISIS_TLV_LSP, "LSP entries"}, + { ISIS_TLV_AUTH, "Authentication"}, + { ISIS_TLV_CHECKSUM, "Checksum"}, + { ISIS_TLV_POI, "Purge Originator Identifier"}, + { ISIS_TLV_LSP_BUFFERSIZE, "LSP Buffersize"}, + { ISIS_TLV_EXT_IS_REACH, "Extended IS Reachability"}, + { ISIS_TLV_IS_ALIAS_ID, "IS Alias ID"}, + { ISIS_TLV_DECNET_PHASE4, "DECnet Phase IV"}, + { ISIS_TLV_LUCENT_PRIVATE, "Lucent Proprietary"}, + { ISIS_TLV_INT_IP_REACH, "IPv4 Internal Reachability"}, + { ISIS_TLV_PROTOCOLS, "Protocols supported"}, + { ISIS_TLV_EXT_IP_REACH, "IPv4 External Reachability"}, + { ISIS_TLV_IDRP_INFO, "Inter-Domain Information Type"}, + { ISIS_TLV_IPADDR, "IPv4 Interface address(es)"}, + { ISIS_TLV_IPAUTH, "IPv4 authentication (deprecated)"}, + { ISIS_TLV_TE_ROUTER_ID, "Traffic Engineering Router ID"}, + { ISIS_TLV_EXTD_IP_REACH, "Extended IPv4 Reachability"}, + { ISIS_TLV_SHARED_RISK_GROUP, "Shared Risk Link Group"}, + { ISIS_TLV_MT_PORT_CAP, "Multi-Topology-Aware Port Capability"}, + { ISIS_TLV_MT_CAPABILITY, "Multi-Topology Capability"}, + { ISIS_TLV_NORTEL_PRIVATE1, "Nortel Proprietary"}, + { ISIS_TLV_NORTEL_PRIVATE2, "Nortel Proprietary"}, + { ISIS_TLV_HOSTNAME, "Hostname"}, + { ISIS_TLV_RESTART_SIGNALING, "Restart Signaling"}, + { ISIS_TLV_MT_IS_REACH, "Multi Topology IS Reachability"}, + { ISIS_TLV_MT_SUPPORTED, "Multi Topology"}, + { ISIS_TLV_IP6ADDR, "IPv6 Interface address(es)"}, + { ISIS_TLV_MT_IP_REACH, "Multi-Topology IPv4 Reachability"}, + { ISIS_TLV_IP6_REACH, "IPv6 reachability"}, + { ISIS_TLV_MT_IP6_REACH, "Multi-Topology IP6 Reachability"}, + { ISIS_TLV_PTP_ADJ, "Point-to-point Adjacency State"}, + { ISIS_TLV_IIH_SEQNR, "Hello PDU Sequence Number"}, + { ISIS_TLV_VENDOR_PRIVATE, "Vendor Private"}, + { 0, NULL } +}; + +#define ESIS_OPTION_PROTOCOLS 129 +#define ESIS_OPTION_QOS_MAINTENANCE 195 /* iso9542 */ +#define ESIS_OPTION_SECURITY 197 /* iso9542 */ +#define ESIS_OPTION_ES_CONF_TIME 198 /* iso9542 */ +#define ESIS_OPTION_PRIORITY 205 /* iso9542 */ +#define ESIS_OPTION_ADDRESS_MASK 225 /* iso9542 */ +#define ESIS_OPTION_SNPA_MASK 226 /* iso9542 */ + +static const struct tok esis_option_values[] = { + { ESIS_OPTION_PROTOCOLS, "Protocols supported"}, + { ESIS_OPTION_QOS_MAINTENANCE, "QoS Maintenance" }, + { ESIS_OPTION_SECURITY, "Security" }, + { ESIS_OPTION_ES_CONF_TIME, "ES Configuration Time" }, + { ESIS_OPTION_PRIORITY, "Priority" }, + { ESIS_OPTION_ADDRESS_MASK, "Addressk Mask" }, + { ESIS_OPTION_SNPA_MASK, "SNPA Mask" }, + { 0, NULL } +}; + +#define CLNP_OPTION_DISCARD_REASON 193 +#define CLNP_OPTION_QOS_MAINTENANCE 195 /* iso8473 */ +#define CLNP_OPTION_SECURITY 197 /* iso8473 */ +#define CLNP_OPTION_SOURCE_ROUTING 200 /* iso8473 */ +#define CLNP_OPTION_ROUTE_RECORDING 203 /* iso8473 */ +#define CLNP_OPTION_PADDING 204 /* iso8473 */ +#define CLNP_OPTION_PRIORITY 205 /* iso8473 */ + +static const struct tok clnp_option_values[] = { + { CLNP_OPTION_DISCARD_REASON, "Discard Reason"}, + { CLNP_OPTION_PRIORITY, "Priority"}, + { CLNP_OPTION_QOS_MAINTENANCE, "QoS Maintenance"}, + { CLNP_OPTION_SECURITY, "Security"}, + { CLNP_OPTION_SOURCE_ROUTING, "Source Routing"}, + { CLNP_OPTION_ROUTE_RECORDING, "Route Recording"}, + { CLNP_OPTION_PADDING, "Padding"}, + { 0, NULL } +}; + +static const struct tok clnp_option_rfd_class_values[] = { + { 0x0, "General"}, + { 0x8, "Address"}, + { 0x9, "Source Routeing"}, + { 0xa, "Lifetime"}, + { 0xb, "PDU Discarded"}, + { 0xc, "Reassembly"}, + { 0, NULL } +}; + +static const struct tok clnp_option_rfd_general_values[] = { + { 0x0, "Reason not specified"}, + { 0x1, "Protocol procedure error"}, + { 0x2, "Incorrect checksum"}, + { 0x3, "PDU discarded due to congestion"}, + { 0x4, "Header syntax error (cannot be parsed)"}, + { 0x5, "Segmentation needed but not permitted"}, + { 0x6, "Incomplete PDU received"}, + { 0x7, "Duplicate option"}, + { 0, NULL } +}; + +static const struct tok clnp_option_rfd_address_values[] = { + { 0x0, "Destination address unreachable"}, + { 0x1, "Destination address unknown"}, + { 0, NULL } +}; + +static const struct tok clnp_option_rfd_source_routeing_values[] = { + { 0x0, "Unspecified source routeing error"}, + { 0x1, "Syntax error in source routeing field"}, + { 0x2, "Unknown address in source routeing field"}, + { 0x3, "Path not acceptable"}, + { 0, NULL } +}; + +static const struct tok clnp_option_rfd_lifetime_values[] = { + { 0x0, "Lifetime expired while data unit in transit"}, + { 0x1, "Lifetime expired during reassembly"}, { 0, NULL } }; -#define SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 -#define SUBTLV_EXT_IS_REACH_LINK_LOCAL_ID 4 -#define SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 -#define SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 -#define SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 -#define SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 -#define SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 -#define SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 -#define SUBTLV_EXT_IS_REACH_TE_METRIC 18 -#define SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 -#define SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 - -#define SUBTLV_IP_REACH_ADMIN_TAG32 1 -#define SUBTLV_IP_REACH_ADMIN_TAG64 2 - -#define SUBTLV_AUTH_SIMPLE 1 -#define SUBTLV_AUTH_MD5 54 -#define SUBTLV_AUTH_MD5_LEN 16 -#define SUBTLV_AUTH_PRIVATE 255 - -static struct tok isis_subtlv_auth_values[] = { - { SUBTLV_AUTH_SIMPLE, "simple text password"}, - { SUBTLV_AUTH_MD5, "HMAC-MD5 password"}, - { SUBTLV_AUTH_PRIVATE, "Routing Domain private password"}, +static const struct tok clnp_option_rfd_pdu_discard_values[] = { + { 0x0, "Unsupported option not specified"}, + { 0x1, "Unsupported protocol version"}, + { 0x2, "Unsupported security option"}, + { 0x3, "Unsupported source routeing option"}, + { 0x4, "Unsupported recording of route option"}, { 0, NULL } }; -#define SUBTLV_IDRP_RES 0 -#define SUBTLV_IDRP_LOCAL 1 -#define SUBTLV_IDRP_ASN 2 +static const struct tok clnp_option_rfd_reassembly_values[] = { + { 0x0, "Reassembly interference"}, + { 0, NULL } +}; + +/* array of 16 error-classes */ +static const struct tok *clnp_option_rfd_error_class[] = { + clnp_option_rfd_general_values, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + clnp_option_rfd_address_values, + clnp_option_rfd_source_routeing_values, + clnp_option_rfd_lifetime_values, + clnp_option_rfd_pdu_discard_values, + clnp_option_rfd_reassembly_values, + NULL, + NULL, + NULL +}; + +#define CLNP_OPTION_OPTION_QOS_MASK 0x3f +#define CLNP_OPTION_SCOPE_MASK 0xc0 +#define CLNP_OPTION_SCOPE_SA_SPEC 0x40 +#define CLNP_OPTION_SCOPE_DA_SPEC 0x80 +#define CLNP_OPTION_SCOPE_GLOBAL 0xc0 + +static const struct tok clnp_option_scope_values[] = { + { CLNP_OPTION_SCOPE_SA_SPEC, "Source Address Specific"}, + { CLNP_OPTION_SCOPE_DA_SPEC, "Destination Address Specific"}, + { CLNP_OPTION_SCOPE_GLOBAL, "Globally unique"}, + { 0, NULL } +}; + +static const struct tok clnp_option_sr_rr_values[] = { + { 0x0, "partial"}, + { 0x1, "complete"}, + { 0, NULL } +}; + +static const struct tok clnp_option_sr_rr_string_values[] = { + { CLNP_OPTION_SOURCE_ROUTING, "source routing"}, + { CLNP_OPTION_ROUTE_RECORDING, "recording of route in progress"}, + { 0, NULL } +}; + +static const struct tok clnp_option_qos_global_values[] = { + { 0x20, "reserved"}, + { 0x10, "sequencing vs. delay"}, + { 0x08, "congested"}, + { 0x04, "delay vs. cost"}, + { 0x02, "error vs. delay"}, + { 0x01, "error vs. cost"}, + { 0, NULL } +}; + +#define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* draft-ietf-isis-traffic-05 */ +#define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* rfc4205 */ +#define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* draft-ietf-isis-traffic-05 */ +#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* draft-ietf-isis-traffic-05 */ +#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* draft-ietf-isis-traffic-05 */ +#define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* draft-ietf-isis-traffic-05 */ +#define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* draft-ietf-isis-traffic-05 */ +#define ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 /* rfc4124 */ +#define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD 12 /* draft-ietf-tewg-diff-te-proto-06 */ +#define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* draft-ietf-isis-traffic-05 */ +#define ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE 19 /* draft-ietf-isis-link-attr-01 */ +#define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* rfc4205 */ +#define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* rfc4205 */ +#define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS 22 /* rfc4124 */ + +#define ISIS_SUBTLV_SPB_METRIC 29 /* rfc6329 */ + +static const struct tok isis_ext_is_reach_subtlv_values[] = { + { ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP, "Administrative groups" }, + { ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" }, + { ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID, "Link Remote Identifier" }, + { ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR, "IPv4 interface address" }, + { ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR, "IPv4 neighbor address" }, + { ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW, "Maximum link bandwidth" }, + { ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW, "Reservable link bandwidth" }, + { ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW, "Unreserved bandwidth" }, + { ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC, "Traffic Engineering Metric" }, + { ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE, "Link Attribute" }, + { ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE, "Link Protection Type" }, + { ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR, "Interface Switching Capability" }, + { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD, "Bandwidth Constraints (old)" }, + { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS, "Bandwidth Constraints" }, + { ISIS_SUBTLV_SPB_METRIC, "SPB Metric" }, + { 250, "Reserved for cisco specific extensions" }, + { 251, "Reserved for cisco specific extensions" }, + { 252, "Reserved for cisco specific extensions" }, + { 253, "Reserved for cisco specific extensions" }, + { 254, "Reserved for cisco specific extensions" }, + { 255, "Reserved for future expansion" }, + { 0, NULL } +}; -static struct tok isis_subtlv_idrp_values[] = { - { SUBTLV_IDRP_RES, "Reserved"}, - { SUBTLV_IDRP_LOCAL, "Routing-Domain Specific"}, - { SUBTLV_IDRP_ASN, "AS Number Tag"}, +#define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32 1 /* draft-ietf-isis-admin-tags-01 */ +#define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64 2 /* draft-ietf-isis-admin-tags-01 */ +#define ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR 117 /* draft-ietf-isis-wg-multi-topology-05 */ + +static const struct tok isis_ext_ip_reach_subtlv_values[] = { + { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32, "32-Bit Administrative tag" }, + { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64, "64-Bit Administrative tag" }, + { ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR, "Management Prefix Color" }, + { 0, NULL } +}; + +static const struct tok isis_subtlv_link_attribute_values[] = { + { 0x01, "Local Protection Available" }, + { 0x02, "Link excluded from local protection path" }, + { 0x04, "Local maintenance required"}, + { 0, NULL } +}; + +#define ISIS_SUBTLV_AUTH_SIMPLE 1 +#define ISIS_SUBTLV_AUTH_GENERIC 3 /* rfc 5310 */ +#define ISIS_SUBTLV_AUTH_MD5 54 +#define ISIS_SUBTLV_AUTH_MD5_LEN 16 +#define ISIS_SUBTLV_AUTH_PRIVATE 255 + +static const struct tok isis_subtlv_auth_values[] = { + { ISIS_SUBTLV_AUTH_SIMPLE, "simple text password"}, + { ISIS_SUBTLV_AUTH_GENERIC, "Generic Crypto key-id"}, + { ISIS_SUBTLV_AUTH_MD5, "HMAC-MD5 password"}, + { ISIS_SUBTLV_AUTH_PRIVATE, "Routing Domain private password"}, + { 0, NULL } +}; + +#define ISIS_SUBTLV_IDRP_RES 0 +#define ISIS_SUBTLV_IDRP_LOCAL 1 +#define ISIS_SUBTLV_IDRP_ASN 2 + +static const struct tok isis_subtlv_idrp_values[] = { + { ISIS_SUBTLV_IDRP_RES, "Reserved"}, + { ISIS_SUBTLV_IDRP_LOCAL, "Routing-Domain Specific"}, + { ISIS_SUBTLV_IDRP_ASN, "AS Number Tag"}, { 0, NULL} }; -#define ISIS_8BIT_MASK(x) ((x)&0xff) +#define ISIS_SUBTLV_SPB_MCID 4 +#define ISIS_SUBTLV_SPB_DIGEST 5 +#define ISIS_SUBTLV_SPB_BVID 6 + +#define ISIS_SUBTLV_SPB_INSTANCE 1 +#define ISIS_SUBTLV_SPBM_SI 3 + +#define ISIS_SPB_MCID_LEN 51 +#define ISIS_SUBTLV_SPB_MCID_MIN_LEN 102 +#define ISIS_SUBTLV_SPB_DIGEST_MIN_LEN 33 +#define ISIS_SUBTLV_SPB_BVID_MIN_LEN 6 +#define ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN 19 +#define ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN 8 + +static const struct tok isis_mt_port_cap_subtlv_values[] = { + { ISIS_SUBTLV_SPB_MCID, "SPB MCID" }, + { ISIS_SUBTLV_SPB_DIGEST, "SPB Digest" }, + { ISIS_SUBTLV_SPB_BVID, "SPB BVID" }, + { 0, NULL } +}; + +static const struct tok isis_mt_capability_subtlv_values[] = { + { ISIS_SUBTLV_SPB_INSTANCE, "SPB Instance" }, + { ISIS_SUBTLV_SPBM_SI, "SPBM Service Identifier and Unicast Address" }, + { 0, NULL } +}; + +struct isis_spb_mcid { + uint8_t format_id; + uint8_t name[32]; + uint8_t revision_lvl[2]; + uint8_t digest[16]; +}; + +struct isis_subtlv_spb_mcid { + struct isis_spb_mcid mcid; + struct isis_spb_mcid aux_mcid; +}; + +struct isis_subtlv_spb_instance { + uint8_t cist_root_id[8]; + uint8_t cist_external_root_path_cost[4]; + uint8_t bridge_priority[2]; + uint8_t spsourceid[4]; + uint8_t no_of_trees; +}; + +#define CLNP_SEGMENT_PART 0x80 +#define CLNP_MORE_SEGMENTS 0x40 +#define CLNP_REQUEST_ER 0x20 + +static const struct tok clnp_flag_values[] = { + { CLNP_SEGMENT_PART, "Segmentation permitted"}, + { CLNP_MORE_SEGMENTS, "more Segments"}, + { CLNP_REQUEST_ER, "request Error Report"}, + { 0, NULL} +}; #define ISIS_MASK_LSP_OL_BIT(x) ((x)&0x4) #define ISIS_MASK_LSP_ISTYPE_BITS(x) ((x)&0x3) @@ -219,19 +486,20 @@ static struct tok isis_subtlv_idrp_values[] = { #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)&0xfff) -#define ISIS_MASK_MTSUB(x) ((x)&0x8000) -#define ISIS_MASK_MTATT(x) ((x)&0x4000) +#define ISIS_MASK_MTID(x) ((x)&0x0fff) +#define ISIS_MASK_MTFLAGS(x) ((x)&0xf000) -#define ISIS_MASK_TLV_EXT_IP_UPDOWN(x) ((x)&0x80) -#define ISIS_MASK_TLV_EXT_IP_SUBTLV(x) ((x)&0x40) +static const struct tok isis_mt_flag_values[] = { + { 0x4000, "ATT bit set"}, + { 0x8000, "Overload bit set"}, + { 0, NULL} +}; -#define ISIS_MASK_TLV_IP6_UPDOWN(x) ((x)&0x80) -#define ISIS_MASK_TLV_IP6_IE(x) ((x)&0x40) -#define ISIS_MASK_TLV_IP6_SUBTLV(x) ((x)&0x20) +#define ISIS_MASK_TLV_EXTD_IP_UPDOWN(x) ((x)&0x80) +#define ISIS_MASK_TLV_EXTD_IP_SUBTLV(x) ((x)&0x40) -#define ISIS_MASK_TLV_RESTART_RR(x) ((x)&0x1) -#define ISIS_MASK_TLV_RESTART_RA(x) ((x)&0x2) +#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) @@ -240,45 +508,7 @@ static struct tok isis_subtlv_idrp_values[] = { #define ISIS_MASK_TLV_SHARED_RISK_GROUP(x) ((x)&0x1) -static const char *isis_gmpls_link_prot_values[] = { - "Extra", - "Unprotected", - "Shared", - "Dedicated 1:1", - "Dedicated 1+1", - "Enhanced", - "Reserved", - "Reserved" -}; - -static struct tok isis_gmpls_sw_cap_values[] = { - { 1, "Packet-Switch Capable-1"}, - { 2, "Packet-Switch Capable-2"}, - { 3, "Packet-Switch Capable-3"}, - { 4, "Packet-Switch Capable-4"}, - { 51, "Layer-2 Switch Capable"}, - { 100, "Time-Division-Multiplex"}, - { 150, "Lambda-Switch Capable"}, - { 200, "Fiber-Switch Capable"}, - { 0, NULL } -}; - -static struct tok isis_gmpls_lsp_enc_values[] = { - { 1, "Packet"}, - { 2, "Ethernet V2/DIX"}, - { 3, "ANSI PDH"}, - { 4, "ETSI PDH"}, - { 5, "SDH ITU-T G.707"}, - { 6, "SONET ANSI T1.105"}, - { 7, "Digital Wrapper"}, - { 8, "Lambda (photonic)"}, - { 9, "Fiber"}, - { 10, "Ethernet 802.3"}, - { 11, "FiberChannel"}, - { 0, NULL } -}; - -static struct tok isis_mt_values[] = { +static const struct tok isis_mt_values[] = { { 0, "IPv4 unicast"}, { 1, "In-Band Management"}, { 2, "IPv6 unicast"}, @@ -287,7 +517,7 @@ static struct tok isis_mt_values[] = { { 0, NULL } }; -static struct tok isis_iih_circuit_type_values[] = { +static const struct tok isis_iih_circuit_type_values[] = { { 1, "Level 1 only"}, { 2, "Level 2 only"}, { 3, "Level 1, Level 2"}, @@ -299,18 +529,11 @@ static struct tok isis_iih_circuit_type_values[] = { #define ISIS_LSP_TYPE_UNUSED2 2 #define ISIS_LSP_TYPE_LEVEL_2 3 -static struct tok isis_lsp_istype_values[] = { +static const struct tok isis_lsp_istype_values[] = { { ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"}, { ISIS_LSP_TYPE_LEVEL_1, "L1 IS"}, { ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"}, - { ISIS_LSP_TYPE_LEVEL_2, "L1L2 IS"}, - { 0, NULL } -}; - -static struct tok isis_nlpid_values[] = { - { NLPID_CLNS, "CLNS"}, - { NLPID_IP, "IPv4"}, - { NLPID_IP6, "IPv6"}, + { ISIS_LSP_TYPE_LEVEL_2, "L2 IS"}, { 0, NULL } }; @@ -323,8 +546,7 @@ static struct tok isis_nlpid_values[] = { #define ISIS_PTP_ADJ_INIT 1 #define ISIS_PTP_ADJ_DOWN 2 - -static struct tok isis_ptp_adjancey_values[] = { +static const struct tok isis_ptp_adjancey_values[] = { { ISIS_PTP_ADJ_UP, "Up" }, { ISIS_PTP_ADJ_INIT, "Initializing" }, { ISIS_PTP_ADJ_DOWN, "Down" }, @@ -332,95 +554,110 @@ static struct tok isis_ptp_adjancey_values[] = { }; struct isis_tlv_ptp_adj { - u_char adjacency_state; - u_char ext_local_circuit_id[4]; - u_char neighbor_sysid[SYSTEM_ID_LEN]; - u_char neighbor_ext_local_circuit_id[4]; + uint8_t adjacency_state; + uint8_t extd_local_circuit_id[4]; + uint8_t neighbor_sysid[SYSTEM_ID_LEN]; + uint8_t neighbor_extd_local_circuit_id[4]; }; -static int osi_cksum(const u_char *, u_int); -static void esis_print(const u_char *, u_int); -static int isis_print(const u_char *, u_int); - -struct isis_tlv_ip_reach { - u_char metric_default; - u_char metric_delay; - u_char metric_expense; - u_char metric_error; - u_char prefix[4]; - u_char mask[4]; +static void osi_print_cksum(netdissect_options *, const uint8_t *pptr, + uint16_t checksum, int checksum_offset, int length); +static int clnp_print(netdissect_options *, const uint8_t *, u_int); +static void esis_print(netdissect_options *, const uint8_t *, u_int); +static int isis_print(netdissect_options *, const uint8_t *, u_int); + +struct isis_metric_block { + uint8_t metric_default; + uint8_t metric_delay; + uint8_t metric_expense; + uint8_t metric_error; }; struct isis_tlv_is_reach { - u_char metric_default; - u_char metric_delay; - u_char metric_expense; - u_char metric_error; - u_char neighbor_nodeid[SYSTEM_ID_LEN+1]; + struct isis_metric_block isis_metric_block; + uint8_t neighbor_nodeid[NODE_ID_LEN]; }; -static struct tok isis_is_reach_virtual_values[] = { +struct isis_tlv_es_reach { + struct isis_metric_block isis_metric_block; + uint8_t neighbor_sysid[SYSTEM_ID_LEN]; +}; + +struct isis_tlv_ip_reach { + struct isis_metric_block isis_metric_block; + uint8_t prefix[4]; + uint8_t mask[4]; +}; + +static const struct tok isis_is_reach_virtual_values[] = { { 0, "IsNotVirtual"}, { 1, "IsVirtual"}, { 0, NULL } }; +static const struct tok isis_restart_flag_values[] = { + { 0x1, "Restart Request"}, + { 0x2, "Restart Acknowledgement"}, + { 0x4, "Suppress adjacency advertisement"}, + { 0, NULL } +}; + struct isis_common_header { - u_char nlpid; - u_char fixed_len; - u_char version; /* Protocol version? */ - u_char id_length; - u_char pdu_type; /* 3 MSbs are reserved */ - u_char pkt_version; /* Packet format version? */ - u_char reserved; - u_char max_area; + uint8_t nlpid; + uint8_t fixed_len; + uint8_t version; /* Protocol version */ + uint8_t id_length; + uint8_t pdu_type; /* 3 MSbits are reserved */ + uint8_t pdu_version; /* Packet format version */ + uint8_t reserved; + uint8_t max_area; }; struct isis_iih_lan_header { - u_char circuit_type; - u_char source_id[SYSTEM_ID_LEN]; - u_char holding_time[2]; - u_char pdu_len[2]; - u_char priority; - u_char lan_id[SYSTEM_ID_LEN+1]; + uint8_t circuit_type; + uint8_t source_id[SYSTEM_ID_LEN]; + uint8_t holding_time[2]; + uint8_t pdu_len[2]; + uint8_t priority; + uint8_t lan_id[NODE_ID_LEN]; }; struct isis_iih_ptp_header { - u_char circuit_type; - u_char source_id[SYSTEM_ID_LEN]; - u_char holding_time[2]; - u_char pdu_len[2]; - u_char circuit_id; + uint8_t circuit_type; + uint8_t source_id[SYSTEM_ID_LEN]; + uint8_t holding_time[2]; + uint8_t pdu_len[2]; + uint8_t circuit_id; }; struct isis_lsp_header { - u_char pdu_len[2]; - u_char remaining_lifetime[2]; - u_char lsp_id[SYSTEM_ID_LEN+2]; - u_char sequence_number[4]; - u_char checksum[2]; - u_char typeblock; + uint8_t pdu_len[2]; + uint8_t remaining_lifetime[2]; + uint8_t lsp_id[LSP_ID_LEN]; + uint8_t sequence_number[4]; + uint8_t checksum[2]; + uint8_t typeblock; }; struct isis_csnp_header { - u_char pdu_len[2]; - u_char source_id[SYSTEM_ID_LEN+1]; - u_char start_lsp_id[SYSTEM_ID_LEN+2]; - u_char end_lsp_id[SYSTEM_ID_LEN+2]; + uint8_t pdu_len[2]; + uint8_t source_id[NODE_ID_LEN]; + uint8_t start_lsp_id[LSP_ID_LEN]; + uint8_t end_lsp_id[LSP_ID_LEN]; }; struct isis_psnp_header { - u_char pdu_len[2]; - u_char source_id[SYSTEM_ID_LEN+1]; + uint8_t pdu_len[2]; + uint8_t source_id[NODE_ID_LEN]; }; struct isis_tlv_lsp { - u_char remaining_lifetime[2]; - u_char lsp_id[SYSTEM_ID_LEN+2]; - u_char sequence_number[4]; - u_char checksum[2]; + uint8_t remaining_lifetime[2]; + uint8_t lsp_id[LSP_ID_LEN]; + uint8_t sequence_number[4]; + uint8_t checksum[2]; }; - + #define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header)) #define ISIS_IIH_LAN_HEADER_SIZE (sizeof(struct isis_iih_lan_header)) #define ISIS_IIH_PTP_HEADER_SIZE (sizeof(struct isis_iih_ptp_header)) @@ -428,430 +665,985 @@ struct isis_tlv_lsp { #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_char *p, u_int length, u_int caplen, - const u_char *esrc, const u_char *edst) +void isoclns_print(netdissect_options *ndo, + const uint8_t *p, u_int length, u_int caplen) { - u_char pdu_type; - const struct isis_common_header *header; - - header = (const struct isis_common_header *)p; - pdu_type = header->pdu_type & PDU_TYPE_MASK; - - if (caplen < 1) { - printf("[|iso-clns] "); - if (!eflag && esrc != NULL && edst != NULL) - printf("%s > %s", - etheraddr_string(esrc), - etheraddr_string(edst)); + if (caplen <= 1) { /* enough bytes on the wire ? */ + ND_PRINT((ndo, "|OSI")); return; } + if (ndo->ndo_eflag) + ND_PRINT((ndo, "OSI NLPID %s (0x%02x): ", tok2str(nlpid_values, "Unknown", *p), *p)); + switch (*p) { - case NLPID_CLNS: - (void)printf("CLNS(%d)", length); - if (!eflag && esrc != NULL && edst != NULL) - (void)printf(", %s > %s", - etheraddr_string(esrc), - etheraddr_string(edst)); + case NLPID_CLNP: + if (!clnp_print(ndo, p, length)) + print_unknown_data(ndo, p, "\n\t", caplen); break; case NLPID_ESIS: - (void)printf("ESIS"); - if (!eflag && esrc != NULL && edst != NULL) - (void)printf(", %s > %s", - etheraddr_string(esrc), - etheraddr_string(edst)); - esis_print(p, length); + esis_print(ndo, p, length); return; case NLPID_ISIS: - (void)printf("ISIS(%d)", length); - if (!eflag && esrc != NULL && edst != NULL) - (void)printf(", %s > %s", - etheraddr_string(esrc), - etheraddr_string(edst)); - if (!isis_print(p, length)) - default_print_unaligned(p, caplen); + if (!isis_print(ndo, p, length)) + print_unknown_data(ndo, p, "\n\t", caplen); break; case NLPID_NULLNS: - (void)printf("ISO NULLNS(%d)", length); - if (!eflag && esrc != NULL && edst != NULL) - (void)printf(", %s > %s", - etheraddr_string(esrc), - etheraddr_string(edst)); + ND_PRINT((ndo, "%slength: %u", ndo->ndo_eflag ? "" : ", ", length)); + break; + + case NLPID_Q933: + q933_print(ndo, p + 1, length - 1); + break; + + case NLPID_IP: + ip_print(ndo, p + 1, length - 1); + break; + + case NLPID_IP6: + ip6_print(ndo, p + 1, length - 1); + break; + + case NLPID_PPP: + ppp_print(ndo, p + 1, length - 1); break; default: - (void)printf("CLNS %02x(%d)", p[0], length); - if (!eflag && esrc != NULL && edst != NULL) - (void)printf(", %s > %s", - etheraddr_string(esrc), - etheraddr_string(edst)); + if (!ndo->ndo_eflag) + ND_PRINT((ndo, "OSI NLPID 0x%02x unknown", *p)); + ND_PRINT((ndo, "%slength: %u", ndo->ndo_eflag ? "" : ", ", length)); if (caplen > 1) - default_print_unaligned(p, caplen); + print_unknown_data(ndo, p, "\n\t", caplen); break; } } -#define ESIS_REDIRECT 6 -#define ESIS_ESH 2 -#define ESIS_ISH 4 +#define CLNP_PDU_ER 1 +#define CLNP_PDU_DT 28 +#define CLNP_PDU_MD 29 +#define CLNP_PDU_ERQ 30 +#define CLNP_PDU_ERP 31 + +static const struct tok clnp_pdu_values[] = { + { CLNP_PDU_ER, "Error Report"}, + { CLNP_PDU_MD, "MD"}, + { CLNP_PDU_DT, "Data"}, + { CLNP_PDU_ERQ, "Echo Request"}, + { CLNP_PDU_ERP, "Echo Response"}, + { 0, NULL } +}; + +struct clnp_header_t { + uint8_t nlpid; + uint8_t length_indicator; + uint8_t version; + uint8_t lifetime; /* units of 500ms */ + uint8_t type; + uint8_t segment_length[2]; + uint8_t cksum[2]; +}; + +struct clnp_segment_header_t { + uint8_t data_unit_id[2]; + uint8_t segment_offset[2]; + uint8_t total_length[2]; +}; + +/* + * clnp_print + * Decode CLNP packets. Return 0 on error. + */ + +static int +clnp_print(netdissect_options *ndo, + const uint8_t *pptr, u_int length) +{ + const uint8_t *optr,*source_address,*dest_address; + u_int li,tlen,nsap_offset,source_address_length,dest_address_length, clnp_pdu_type, clnp_flags; + const struct clnp_header_t *clnp_header; + const struct clnp_segment_header_t *clnp_segment_header; + uint8_t rfd_error_major,rfd_error_minor; + + clnp_header = (const struct clnp_header_t *) pptr; + ND_TCHECK(*clnp_header); + + li = clnp_header->length_indicator; + optr = pptr; + + if (!ndo->ndo_eflag) + ND_PRINT((ndo, "CLNP")); + + /* + * Sanity checking of the header. + */ + + if (clnp_header->version != CLNP_VERSION) { + ND_PRINT((ndo, "version %d packet not supported", clnp_header->version)); + return (0); + } + + /* FIXME further header sanity checking */ + + clnp_pdu_type = clnp_header->type & CLNP_PDU_TYPE_MASK; + clnp_flags = clnp_header->type & CLNP_FLAG_MASK; + + pptr += sizeof(struct clnp_header_t); + li -= sizeof(struct clnp_header_t); + dest_address_length = *pptr; + dest_address = pptr + 1; + + pptr += (1 + dest_address_length); + li -= (1 + dest_address_length); + source_address_length = *pptr; + source_address = pptr +1; + + pptr += (1 + source_address_length); + li -= (1 + source_address_length); + + if (ndo->ndo_vflag < 1) { + ND_PRINT((ndo, "%s%s > %s, %s, length %u", + ndo->ndo_eflag ? "" : ", ", + isonsap_string(ndo, source_address, source_address_length), + isonsap_string(ndo, dest_address, dest_address_length), + tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type), + length)); + return (1); + } + ND_PRINT((ndo, "%slength %u", ndo->ndo_eflag ? "" : ", ", length)); + + ND_PRINT((ndo, "\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, Segment PDU length: %u, checksum: 0x%04x", + tok2str(clnp_pdu_values, "unknown (%u)",clnp_pdu_type), + clnp_header->length_indicator, + clnp_header->version, + clnp_header->lifetime/2, + (clnp_header->lifetime%2)*5, + EXTRACT_16BITS(clnp_header->segment_length), + EXTRACT_16BITS(clnp_header->cksum))); + + osi_print_cksum(ndo, optr, EXTRACT_16BITS(clnp_header->cksum), 7, + clnp_header->length_indicator); + + ND_PRINT((ndo, "\n\tFlags [%s]", + bittok2str(clnp_flag_values, "none", clnp_flags))); + + ND_PRINT((ndo, "\n\tsource address (length %u): %s\n\tdest address (length %u): %s", + source_address_length, + isonsap_string(ndo, source_address, source_address_length), + dest_address_length, + isonsap_string(ndo, dest_address, dest_address_length))); + + if (clnp_flags & CLNP_SEGMENT_PART) { + clnp_segment_header = (const struct clnp_segment_header_t *) pptr; + ND_TCHECK(*clnp_segment_header); + ND_PRINT((ndo, "\n\tData Unit ID: 0x%04x, Segment Offset: %u, Total PDU Length: %u", + EXTRACT_16BITS(clnp_segment_header->data_unit_id), + EXTRACT_16BITS(clnp_segment_header->segment_offset), + EXTRACT_16BITS(clnp_segment_header->total_length))); + pptr+=sizeof(const struct clnp_segment_header_t); + li-=sizeof(const struct clnp_segment_header_t); + } + + /* now walk the options */ + while (li >= 2) { + u_int op, opli; + const uint8_t *tptr; + + ND_TCHECK2(*pptr, 2); + if (li < 2) { + ND_PRINT((ndo, ", bad opts/li")); + return (0); + } + op = *pptr++; + opli = *pptr++; + li -= 2; + ND_TCHECK2(*pptr, opli); + if (opli > li) { + ND_PRINT((ndo, ", opt (%d) too long", op)); + return (0); + } + li -= opli; + tptr = pptr; + tlen = opli; + + ND_PRINT((ndo, "\n\t %s Option #%u, length %u, value: ", + tok2str(clnp_option_values,"Unknown",op), + op, + opli)); + + switch (op) { + + + case CLNP_OPTION_ROUTE_RECORDING: /* those two options share the format */ + case CLNP_OPTION_SOURCE_ROUTING: + ND_PRINT((ndo, "%s %s", + tok2str(clnp_option_sr_rr_values,"Unknown",*tptr), + tok2str(clnp_option_sr_rr_string_values, "Unknown Option %u", op))); + nsap_offset=*(tptr+1); + if (nsap_offset == 0) { + ND_PRINT((ndo, " Bad NSAP offset (0)")); + break; + } + nsap_offset-=1; /* offset to nsap list */ + if (nsap_offset > tlen) { + ND_PRINT((ndo, " Bad NSAP offset (past end of option)")); + break; + } + tptr+=nsap_offset; + tlen-=nsap_offset; + while (tlen > 0) { + source_address_length=*tptr; + if (tlen < source_address_length+1) { + ND_PRINT((ndo, "\n\t NSAP address goes past end of option")); + break; + } + if (source_address_length > 0) { + source_address=(tptr+1); + ND_TCHECK2(*source_address, source_address_length); + ND_PRINT((ndo, "\n\t NSAP address (length %u): %s", + source_address_length, + isonsap_string(ndo, source_address, source_address_length))); + } + tlen-=source_address_length+1; + } + break; + + case CLNP_OPTION_PRIORITY: + ND_PRINT((ndo, "0x%1x", *tptr&0x0f)); + break; + + case CLNP_OPTION_QOS_MAINTENANCE: + ND_PRINT((ndo, "\n\t Format Code: %s", + tok2str(clnp_option_scope_values, "Reserved", *tptr&CLNP_OPTION_SCOPE_MASK))); + + if ((*tptr&CLNP_OPTION_SCOPE_MASK) == CLNP_OPTION_SCOPE_GLOBAL) + ND_PRINT((ndo, "\n\t QoS Flags [%s]", + bittok2str(clnp_option_qos_global_values, + "none", + *tptr&CLNP_OPTION_OPTION_QOS_MASK))); + break; + + case CLNP_OPTION_SECURITY: + ND_PRINT((ndo, "\n\t Format Code: %s, Security-Level %u", + tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK), + *(tptr+1))); + break; + + case CLNP_OPTION_DISCARD_REASON: + rfd_error_major = (*tptr&0xf0) >> 4; + rfd_error_minor = *tptr&0x0f; + ND_PRINT((ndo, "\n\t Class: %s Error (0x%01x), %s (0x%01x)", + tok2str(clnp_option_rfd_class_values,"Unknown",rfd_error_major), + rfd_error_major, + tok2str(clnp_option_rfd_error_class[rfd_error_major],"Unknown",rfd_error_minor), + rfd_error_minor)); + break; + + case CLNP_OPTION_PADDING: + ND_PRINT((ndo, "padding data")); + break; + + /* + * FIXME those are the defined Options that lack a decoder + * you are welcome to contribute code ;-) + */ + + default: + print_unknown_data(ndo, tptr, "\n\t ", opli); + break; + } + if (ndo->ndo_vflag > 1) + print_unknown_data(ndo, pptr, "\n\t ", opli); + pptr += opli; + } + + switch (clnp_pdu_type) { + + case CLNP_PDU_ER: /* fall through */ + case CLNP_PDU_ERP: + ND_TCHECK(*pptr); + if (*(pptr) == NLPID_CLNP) { + ND_PRINT((ndo, "\n\t-----original packet-----\n\t")); + /* FIXME recursion protection */ + clnp_print(ndo, pptr, length - clnp_header->length_indicator); + break; + } + + case CLNP_PDU_DT: + case CLNP_PDU_MD: + case CLNP_PDU_ERQ: + + default: + /* dump the PDU specific data */ + if (length-(pptr-optr) > 0) { + ND_PRINT((ndo, "\n\t undecoded non-header data, length %u", length-clnp_header->length_indicator)); + print_unknown_data(ndo, pptr, "\n\t ", length - (pptr - optr)); + } + } + + return (1); + + trunc: + ND_PRINT((ndo, "[|clnp]")); + return (1); + +} + + +#define ESIS_PDU_REDIRECT 6 +#define ESIS_PDU_ESH 2 +#define ESIS_PDU_ISH 4 -struct esis_hdr { - u_char version; - u_char reserved; - u_char type; - u_char tmo[2]; - u_char cksum[2]; +static const struct tok esis_pdu_values[] = { + { ESIS_PDU_REDIRECT, "redirect"}, + { ESIS_PDU_ESH, "ESH"}, + { ESIS_PDU_ISH, "ISH"}, + { 0, NULL } +}; + +struct esis_header_t { + uint8_t nlpid; + uint8_t length_indicator; + uint8_t version; + uint8_t reserved; + uint8_t type; + uint8_t holdtime[2]; + uint8_t cksum[2]; }; static void -esis_print(const u_char *p, u_int length) +esis_print(netdissect_options *ndo, + const uint8_t *pptr, u_int length) { - const u_char *ep; - u_int li; - const struct esis_hdr *eh; + const uint8_t *optr; + u_int li,esis_pdu_type,source_address_length, source_address_number; + const struct esis_header_t *esis_header; + + if (!ndo->ndo_eflag) + ND_PRINT((ndo, "ES-IS")); if (length <= 2) { - if (qflag) - printf(" bad pkt!"); - else - printf(" no header at all!"); + ND_PRINT((ndo, ndo->ndo_qflag ? "bad pkt!" : "no header at all!")); return; } - li = p[1]; - eh = (const struct esis_hdr *) &p[2]; - ep = p + li; + + esis_header = (const struct esis_header_t *) pptr; + ND_TCHECK(*esis_header); + li = esis_header->length_indicator; + optr = pptr; + + /* + * Sanity checking of the header. + */ + + if (esis_header->nlpid != NLPID_ESIS) { + ND_PRINT((ndo, " nlpid 0x%02x packet not supported", esis_header->nlpid)); + return; + } + + if (esis_header->version != ESIS_VERSION) { + ND_PRINT((ndo, " version %d packet not supported", esis_header->version)); + return; + } + if (li > length) { - if (qflag) - printf(" bad pkt!"); - else - printf(" LI(%d) > PDU size (%d)!", li, length); - return; + ND_PRINT((ndo, " length indicator(%d) > PDU size (%d)!", li, length)); + return; } - if (li < sizeof(struct esis_hdr) + 2) { - if (qflag) - printf(" bad pkt!"); - else { - printf(" too short for esis header %d:", li); - while (--length != 0) - printf("%02X", *p++); - } - return; + + if (li < sizeof(struct esis_header_t) + 2) { + ND_PRINT((ndo, " length indicator < min PDU size %d:", li)); + while (pptr < ndo->ndo_snapend) + ND_PRINT((ndo, "%02X", *pptr++)); + return; } - switch (eh->type & 0x1f) { - case ESIS_REDIRECT: - printf(" redirect"); - break; + esis_pdu_type = esis_header->type & ESIS_PDU_TYPE_MASK; - case ESIS_ESH: - printf(" esh"); - break; + if (ndo->ndo_vflag < 1) { + ND_PRINT((ndo, "%s%s, length %u", + ndo->ndo_eflag ? "" : ", ", + tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type), + length)); + return; + } else + ND_PRINT((ndo, "%slength %u\n\t%s (%u)", + ndo->ndo_eflag ? "" : ", ", + length, + tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type), + esis_pdu_type)); - case ESIS_ISH: - printf(" ish"); - break; + ND_PRINT((ndo, ", v: %u%s", esis_header->version, esis_header->version == ESIS_VERSION ? "" : "unsupported" )); + ND_PRINT((ndo, ", checksum: 0x%04x", EXTRACT_16BITS(esis_header->cksum))); - default: - printf(" type %d", eh->type & 0x1f); - break; - } - if (vflag && osi_cksum(p, li)) { - printf(" bad cksum (got 0x%02x%02x)", - eh->cksum[1], eh->cksum[0]); - default_print(p, length); - return; - } - if (eh->version != 1) { - printf(" unsupported version %d", eh->version); - return; - } - p += sizeof(*eh) + 2; - li -= sizeof(*eh) + 2; /* protoid * li */ + osi_print_cksum(ndo, pptr, EXTRACT_16BITS(esis_header->cksum), 7, li); + + ND_PRINT((ndo, ", holding time: %us, length indicator: %u", + EXTRACT_16BITS(esis_header->holdtime), li)); + + if (ndo->ndo_vflag > 1) + print_unknown_data(ndo, optr, "\n\t", sizeof(struct esis_header_t)); - switch (eh->type & 0x1f) { - case ESIS_REDIRECT: { - const u_char *dst, *snpa, *is; + pptr += sizeof(struct esis_header_t); + li -= sizeof(struct esis_header_t); - dst = p; p += *p + 1; - if (p > snapend) + switch (esis_pdu_type) { + case ESIS_PDU_REDIRECT: { + const uint8_t *dst, *snpa, *neta; + u_int dstl, snpal, netal; + + ND_TCHECK(*pptr); + if (li < 1) { + ND_PRINT((ndo, ", bad redirect/li")); return; - printf("\n\t\t\t %s", isonsap_string(dst)); - snpa = p; p += *p + 1; - is = p; p += *p + 1; - if (p > snapend) + } + dstl = *pptr; + pptr++; + li--; + ND_TCHECK2(*pptr, dstl); + if (li < dstl) { + ND_PRINT((ndo, ", bad redirect/li")); return; - if (p > ep) { - printf(" [bad li]"); + } + dst = pptr; + pptr += dstl; + li -= dstl; + ND_PRINT((ndo, "\n\t %s", isonsap_string(ndo, dst, dstl))); + + ND_TCHECK(*pptr); + if (li < 1) { + ND_PRINT((ndo, ", bad redirect/li")); return; } - if (is[0] == 0) - printf(" > %s", etheraddr_string(&snpa[1])); - else - printf(" > %s", isonsap_string(is)); - li = ep - p; - break; - } -#if 0 - case ESIS_ESH: - printf(" esh"); - break; -#endif - case ESIS_ISH: { - const u_char *is; - - is = p; p += *p + 1; - if (p > ep) { - printf(" [bad li]"); + snpal = *pptr; + pptr++; + li--; + ND_TCHECK2(*pptr, snpal); + if (li < snpal) { + ND_PRINT((ndo, ", bad redirect/li")); + return; + } + snpa = pptr; + pptr += snpal; + li -= snpal; + ND_TCHECK(*pptr); + if (li < 1) { + ND_PRINT((ndo, ", bad redirect/li")); return; } - if (p > snapend) + netal = *pptr; + pptr++; + ND_TCHECK2(*pptr, netal); + if (li < netal) { + ND_PRINT((ndo, ", bad redirect/li")); return; - if (!qflag) - printf("\n\t\t\t %s", isonsap_string(is)); - li = ep - p; + } + neta = pptr; + pptr += netal; + li -= netal; + + if (netal == 0) + ND_PRINT((ndo, "\n\t %s", etheraddr_string(ndo, snpa))); + else + ND_PRINT((ndo, "\n\t %s", isonsap_string(ndo, neta, netal))); break; } + case ESIS_PDU_ESH: + ND_TCHECK(*pptr); + if (li < 1) { + ND_PRINT((ndo, ", bad esh/li")); + return; + } + source_address_number = *pptr; + pptr++; + li--; + + ND_PRINT((ndo, "\n\t Number of Source Addresses: %u", source_address_number)); + + while (source_address_number > 0) { + ND_TCHECK(*pptr); + if (li < 1) { + ND_PRINT((ndo, ", bad esh/li")); + return; + } + source_address_length = *pptr; + pptr++; + li--; + + ND_TCHECK2(*pptr, source_address_length); + if (li < source_address_length) { + ND_PRINT((ndo, ", bad esh/li")); + return; + } + ND_PRINT((ndo, "\n\t NET (length: %u): %s", + source_address_length, + isonsap_string(ndo, pptr, source_address_length))); + pptr += source_address_length; + li -= source_address_length; + source_address_number--; + } + + break; + + case ESIS_PDU_ISH: { + ND_TCHECK(*pptr); + if (li < 1) { + ND_PRINT((ndo, ", bad ish/li")); + return; + } + source_address_length = *pptr; + pptr++; + li--; + ND_TCHECK2(*pptr, source_address_length); + if (li < source_address_length) { + ND_PRINT((ndo, ", bad ish/li")); + return; + } + ND_PRINT((ndo, "\n\t NET (length: %u): %s", source_address_length, isonsap_string(ndo, pptr, source_address_length))); + pptr += source_address_length; + li -= source_address_length; + break; + } + default: - (void)printf(" len=%d", length); - if (length && p < snapend) { - length = snapend - p; - default_print(p, length); + if (ndo->ndo_vflag <= 1) { + if (pptr < ndo->ndo_snapend) + print_unknown_data(ndo, pptr, "\n\t ", ndo->ndo_snapend - pptr); } return; } - if (vflag) - while (p < ep && li) { - u_int op, opli; - const u_char *q; - - if (snapend - p < 2) - return; - if (li < 2) { - printf(" bad opts/li"); - return; - } - op = *p++; - opli = *p++; - li -= 2; - if (opli > li) { - printf(" opt (%d) too long", op); - return; - } - li -= opli; - q = p; - p += opli; - if (snapend < p) - return; - if (op == 198 && opli == 2) { - printf(" tmo=%d", q[0] * 256 + q[1]); - continue; - } - printf (" %d:<", op); - while (opli-- > 0) - printf("%02x", *q++); - printf (">"); - } + + /* now walk the options */ + while (li != 0) { + u_int op, opli; + const uint8_t *tptr; + + if (li < 2) { + ND_PRINT((ndo, ", bad opts/li")); + return; + } + ND_TCHECK2(*pptr, 2); + op = *pptr++; + opli = *pptr++; + li -= 2; + if (opli > li) { + ND_PRINT((ndo, ", opt (%d) too long", op)); + return; + } + li -= opli; + tptr = pptr; + + ND_PRINT((ndo, "\n\t %s Option #%u, length %u, value: ", + tok2str(esis_option_values,"Unknown",op), + op, + opli)); + + switch (op) { + + case ESIS_OPTION_ES_CONF_TIME: + if (opli == 2) { + ND_TCHECK2(*pptr, 2); + ND_PRINT((ndo, "%us", EXTRACT_16BITS(tptr))); + } else + ND_PRINT((ndo, "(bad length)")); + break; + + case ESIS_OPTION_PROTOCOLS: + while (opli>0) { + ND_TCHECK(*pptr); + ND_PRINT((ndo, "%s (0x%02x)", + tok2str(nlpid_values, + "unknown", + *tptr), + *tptr)); + if (opli>1) /* further NPLIDs ? - put comma */ + ND_PRINT((ndo, ", ")); + tptr++; + opli--; + } + break; + + /* + * FIXME those are the defined Options that lack a decoder + * you are welcome to contribute code ;-) + */ + + case ESIS_OPTION_QOS_MAINTENANCE: + case ESIS_OPTION_SECURITY: + case ESIS_OPTION_PRIORITY: + case ESIS_OPTION_ADDRESS_MASK: + case ESIS_OPTION_SNPA_MASK: + + default: + print_unknown_data(ndo, tptr, "\n\t ", opli); + break; + } + if (ndo->ndo_vflag > 1) + print_unknown_data(ndo, pptr, "\n\t ", opli); + pptr += opli; + } +trunc: + return; } -/* allocate space for the following string - * xx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx - * 32 bytes plus one termination byte */ -char nsap[33]; -char * -print_nsap(register const u_char *cp, register int length) +static void +isis_print_mcid(netdissect_options *ndo, + const struct isis_spb_mcid *mcid) { - int i; - char *pos = nsap; + int i; - for (i = 0; i < length; i++) { - if (!TTEST2(*cp, 1)) - return (0); - pos+=sprintf(pos, "%02x", *cp++); - if (((i & 1) == 0) && (i + 1 < length)) { - pos+=sprintf(pos, "."); - } - } - *(pos) = '\0'; - return (nsap); + ND_PRINT((ndo, "ID: %d, Name: ", mcid->format_id)); + + for(i=0; i<32; i++) + { + ND_PRINT((ndo, "%c", mcid->name[i])); + if(mcid->name[i] == '\0') + break; + } + + ND_PRINT((ndo, "\n\t Lvl: %d", EXTRACT_16BITS(mcid->revision_lvl))); + + ND_PRINT((ndo, ", Digest: ")); + + for(i=0;i<16;i++) + ND_PRINT((ndo, "%.2x ", mcid->digest[i])); } -char *isis_print_sysid (const u_char *); -/* allocate space for the following string - * xxxx.xxxx.xxxx - * 14 bytes plus one termination byte */ -char sysid[15]; -char * -isis_print_sysid(const u_char *cp) +static int +isis_print_mt_port_cap_subtlv(netdissect_options *ndo, + const uint8_t *tptr, int len) { - int i; - char *pos = sysid; + int stlv_type, stlv_len; + const struct isis_subtlv_spb_mcid *subtlv_spb_mcid; + int i; - for (i = 1; i <= 6; i++) { - if (!TTEST2(*cp, 1)) - return (0); - pos+=sprintf(pos, "%02x", *cp++); - if ((i==2)^(i==4)) { - pos+=sprintf(pos, "."); - } - } - *(pos) = '\0'; - return (sysid); -} + while (len > 0) + { + stlv_type = *(tptr++); + stlv_len = *(tptr++); + /* first lets see if we know the subTLVs name*/ + ND_PRINT((ndo, "\n\t %s subTLV #%u, length: %u", + tok2str(isis_mt_port_cap_subtlv_values, "unknown", stlv_type), + stlv_type, + stlv_len)); -char *isis_print_nodeid (const u_char *); -/* allocate space for the following string - * xxxx.xxxx.xxxx.yy - * 17 bytes plus one termination byte */ -char nodeid[18]; -char * -isis_print_nodeid(const u_char *cp) -{ - int i; - char *pos = nodeid; + /*len -= TLV_TYPE_LEN_OFFSET;*/ + len = len -2; - for (i = 1; i <= 7; i++) { - if (!TTEST2(*cp, 1)) - return (0); - pos+=sprintf(pos, "%02x", *cp++); - if ((i & 1) == 0) { - pos+=sprintf(pos, "."); - } - } - *(pos) = '\0'; - return (nodeid); + switch (stlv_type) + { + case ISIS_SUBTLV_SPB_MCID: + { + if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_MCID_MIN_LEN)) + goto trunctlv; + + subtlv_spb_mcid = (const struct isis_subtlv_spb_mcid *)tptr; + + ND_PRINT((ndo, "\n\t MCID: ")); + isis_print_mcid(ndo, &(subtlv_spb_mcid->mcid)); + + /*tptr += SPB_MCID_MIN_LEN; + len -= SPB_MCID_MIN_LEN; */ + + ND_PRINT((ndo, "\n\t AUX-MCID: ")); + isis_print_mcid(ndo, &(subtlv_spb_mcid->aux_mcid)); + + /*tptr += SPB_MCID_MIN_LEN; + len -= SPB_MCID_MIN_LEN; */ + tptr = tptr + sizeof(struct isis_subtlv_spb_mcid); + len = len - sizeof(struct isis_subtlv_spb_mcid); + + break; + } + + case ISIS_SUBTLV_SPB_DIGEST: + { + if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_DIGEST_MIN_LEN)) + goto trunctlv; + + ND_PRINT((ndo, "\n\t RES: %d V: %d A: %d D: %d", + (*(tptr) >> 5), (((*tptr)>> 4) & 0x01), + ((*(tptr) >> 2) & 0x03), ((*tptr) & 0x03))); + + tptr++; + + ND_PRINT((ndo, "\n\t Digest: ")); + + for(i=1;i<=8; i++) + { + ND_PRINT((ndo, "%08x ", EXTRACT_32BITS(tptr))); + if (i%4 == 0 && i != 8) + ND_PRINT((ndo, "\n\t ")); + tptr = tptr + 4; + } + + len = len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN; + + break; + } + + case ISIS_SUBTLV_SPB_BVID: + { + if (!ND_TTEST2(*(tptr), stlv_len)) + goto trunctlv; + + while (len) + { + if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_BVID_MIN_LEN)) + goto trunctlv; + + ND_PRINT((ndo, "\n\t ECT: %08x", + EXTRACT_32BITS(tptr))); + + tptr = tptr+4; + + ND_PRINT((ndo, " BVID: %d, U:%01x M:%01x ", + (EXTRACT_16BITS (tptr) >> 4) , + (EXTRACT_16BITS (tptr) >> 3) & 0x01, + (EXTRACT_16BITS (tptr) >> 2) & 0x01)); + + tptr = tptr + 2; + len = len - ISIS_SUBTLV_SPB_BVID_MIN_LEN; + } + + break; + } + + default: + break; + } + } + + return 0; + + trunctlv: + ND_PRINT((ndo, "\n\t\t packet exceeded snapshot")); + return(1); } -char *isis_print_lspid (const u_char *); -/* allocate space for the following string - * xxxx.xxxx.xxxx.yy-zz - * 20 bytes plus one termination byte */ -char lspid[21]; -char * -isis_print_lspid(const u_char *cp) +static int +isis_print_mt_capability_subtlv(netdissect_options *ndo, + const uint8_t *tptr, int len) { - int i; - char *pos = lspid; + int stlv_type, stlv_len, tmp; - for (i = 1; i <= 7; i++) { - pos+=sprintf(pos, "%02x", *cp++); - if ((i & 1) == 0) - pos+=sprintf(pos, "."); - } - pos+=sprintf(pos, "-%02x", *cp); - return (lspid); -} + while (len > 0) + { + stlv_type = *(tptr++); + stlv_len = *(tptr++); -/* - * this is a generic routine for printing unknown data; - * as it is called from various places (TLV and subTLV parsing routines) - * we pass on the linefeed plus indentation string to - * get a proper output - returns 0 on error - */ + /* first lets see if we know the subTLVs name*/ + ND_PRINT((ndo, "\n\t %s subTLV #%u, length: %u", + tok2str(isis_mt_capability_subtlv_values, "unknown", stlv_type), + stlv_type, + stlv_len)); -static int -isis_print_unknown_data(const u_char *cp,const char *lf,int len) + len = len - 2; + + switch (stlv_type) + { + case ISIS_SUBTLV_SPB_INSTANCE: + + if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN)) + goto trunctlv; + + ND_PRINT((ndo, "\n\t CIST Root-ID: %08x", EXTRACT_32BITS(tptr))); + tptr = tptr+4; + ND_PRINT((ndo, " %08x", EXTRACT_32BITS(tptr))); + tptr = tptr+4; + ND_PRINT((ndo, ", Path Cost: %08x", EXTRACT_32BITS(tptr))); + tptr = tptr+4; + ND_PRINT((ndo, ", Prio: %d", EXTRACT_16BITS(tptr))); + tptr = tptr + 2; + ND_PRINT((ndo, "\n\t RES: %d", + EXTRACT_16BITS(tptr) >> 5)); + ND_PRINT((ndo, ", V: %d", + (EXTRACT_16BITS(tptr) >> 4) & 0x0001)); + ND_PRINT((ndo, ", SPSource-ID: %d", + (EXTRACT_32BITS(tptr) & 0x000fffff))); + tptr = tptr+4; + ND_PRINT((ndo, ", No of Trees: %x", *(tptr))); + + tmp = *(tptr++); + + len = len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN; + + while (tmp) + { + if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN)) + goto trunctlv; + + ND_PRINT((ndo, "\n\t U:%d, M:%d, A:%d, RES:%d", + *(tptr) >> 7, (*(tptr) >> 6) & 0x01, + (*(tptr) >> 5) & 0x01, (*(tptr) & 0x1f))); + + tptr++; + + ND_PRINT((ndo, ", ECT: %08x", EXTRACT_32BITS(tptr))); + + tptr = tptr + 4; + + ND_PRINT((ndo, ", BVID: %d, SPVID: %d", + (EXTRACT_24BITS(tptr) >> 12) & 0x000fff, + EXTRACT_24BITS(tptr) & 0x000fff)); + + tptr = tptr + 3; + len = len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN; + tmp--; + } + + break; + + case ISIS_SUBTLV_SPBM_SI: + + if (!ND_TTEST2(*(tptr), 6)) + goto trunctlv; + + ND_PRINT((ndo, "\n\t BMAC: %08x", EXTRACT_32BITS(tptr))); + tptr = tptr+4; + ND_PRINT((ndo, "%04x", EXTRACT_16BITS(tptr))); + tptr = tptr+2; + + ND_PRINT((ndo, ", RES: %d, VID: %d", EXTRACT_16BITS(tptr) >> 12, + (EXTRACT_16BITS(tptr)) & 0x0fff)); + + tptr = tptr+2; + len = len - 8; + stlv_len = stlv_len - 8; + + while (stlv_len) + { + ND_PRINT((ndo, "\n\t T: %d, R: %d, RES: %d, ISID: %d", + (EXTRACT_32BITS(tptr) >> 31), + (EXTRACT_32BITS(tptr) >> 30) & 0x01, + (EXTRACT_32BITS(tptr) >> 24) & 0x03f, + (EXTRACT_32BITS(tptr)) & 0x0ffffff)); + + tptr = tptr + 4; + len = len - 4; + stlv_len = stlv_len - 4; + } + + break; + + default: + break; + } + } + return 0; + + trunctlv: + ND_PRINT((ndo, "\n\t\t packet exceeded snapshot")); + return(1); +} + +/* shared routine for printing system, node and lsp-ids */ +static char * +isis_print_id(const uint8_t *cp, int id_len) { - int i; - - printf("%s0x0000: ",lf); - for(i=0;i= NODE_ID_LEN) { + snprintf(pos, sizeof(id) - (pos - id), ".%02x", *cp++); + pos += strlen(pos); + } + if (id_len == LSP_ID_LEN) + snprintf(pos, sizeof(id) - (pos - id), "-%02x", *cp); + return (id); +} +/* print the 4-byte metric block which is common found in the old-style TLVs */ +static int +isis_print_metric_block(netdissect_options *ndo, + const struct isis_metric_block *isis_metric_block) +{ + ND_PRINT((ndo, ", Default Metric: %d, %s", + ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default), + ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal")); + if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay)) + ND_PRINT((ndo, "\n\t\t Delay Metric: %d, %s", + ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay), + ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal")); + if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense)) + ND_PRINT((ndo, "\n\t\t Expense Metric: %d, %s", + ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense), + ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal")); + if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error)) + ND_PRINT((ndo, "\n\t\t Error Metric: %d, %s", + ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error), + ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal")); + + return(1); /* everything is ok */ } static int -isis_print_tlv_ip_reach (const u_char *cp, int length) +isis_print_tlv_ip_reach(netdissect_options *ndo, + const uint8_t *cp, const char *ident, int length) { - u_int bitmasks[33] = { - 0x00000000, - 0x80000000, 0xc0000000, 0xe0000000, 0xf0000000, - 0xf8000000, 0xfc000000, 0xfe000000, 0xff000000, - 0xff800000, 0xffc00000, 0xffe00000, 0xfff00000, - 0xfff80000, 0xfffc0000, 0xfffe0000, 0xffff0000, - 0xffff8000, 0xffffc000, 0xffffe000, 0xfffff000, - 0xfffff800, 0xfffffc00, 0xfffffe00, 0xffffff00, - 0xffffff80, 0xffffffc0, 0xffffffe0, 0xfffffff0, - 0xfffffff8, 0xfffffffc, 0xfffffffe, 0xffffffff - }; - u_int mask; 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 (length < sizeof(*tlv_ip_reach)) { - printf("short IPv4 reachability (%d vs %lu)", length, - (unsigned long)sizeof(*tlv_ip_reach)); + if ((size_t)length < sizeof(*tlv_ip_reach)) { + ND_PRINT((ndo, "short IPv4 Reachability (%d vs %lu)", + length, + (unsigned long)sizeof(*tlv_ip_reach))); return (0); } - if (!TTEST(*tlv_ip_reach)) + if (!ND_TTEST(*tlv_ip_reach)) return (0); - mask = EXTRACT_32BITS(tlv_ip_reach->mask); - prefix_len = 0; - - /* lets see if we can transform the mask into a prefixlen */ - while (prefix_len <= 33) { - if (bitmasks[prefix_len++] == mask) { - prefix_len--; - break; - } - } + prefix_len = mask2plen(EXTRACT_32BITS(tlv_ip_reach->mask)); - /* - * 34 indicates no match -> must be a discontiguous netmask - * lets dump the mask, otherwise print the prefix_len - */ - if (prefix_len == 34) - printf("\n\t\t\tIPv4 prefix: %s mask %s", - ipaddr_string((tlv_ip_reach->prefix)), - ipaddr_string((tlv_ip_reach->mask))); - else - printf("\n\t\t\tIPv4 prefix: %s/%u", - ipaddr_string((tlv_ip_reach->prefix)), - prefix_len); - - printf("\n\t\t\t Default Metric: %02d, %s, Distribution: %s", - ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->metric_default), - ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->metric_default) ? "External" : "Internal", - ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->metric_default) ? "down" : "up"); - - if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->metric_delay)) - printf("\n\t\t\t Delay Metric: %02d, %s", - ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->metric_delay), - ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->metric_delay) ? "External" : "Internal"); - - if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->metric_expense)) - printf("\n\t\t\t Expense Metric: %02d, %s", - ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->metric_expense), - ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->metric_expense) ? "External" : "Internal"); - - if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->metric_error)) - printf("\n\t\t\t Error Metric: %02d, %s", - ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->metric_error), - ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->metric_error) ? "External" : "Internal"); + if (prefix_len == -1) + ND_PRINT((ndo, "%sIPv4 prefix: %s mask %s", + ident, + ipaddr_string(ndo, (tlv_ip_reach->prefix)), + ipaddr_string(ndo, (tlv_ip_reach->mask)))); + else + ND_PRINT((ndo, "%sIPv4 prefix: %15s/%u", + ident, + ipaddr_string(ndo, (tlv_ip_reach->prefix)), + prefix_len)); + + ND_PRINT((ndo, ", Distribution: %s, Metric: %u, %s", + ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up", + ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default), + ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal")); + + if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay)) + ND_PRINT((ndo, "%s Delay Metric: %u, %s", + ident, + ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay), + ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal")); + + if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense)) + ND_PRINT((ndo, "%s Expense Metric: %u, %s", + ident, + ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense), + ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal")); + + if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error)) + ND_PRINT((ndo, "%s Error Metric: %u, %s", + ident, + ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error), + ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal")); length -= sizeof(struct isis_tlv_ip_reach); tlv_ip_reach++; @@ -865,297 +1657,489 @@ isis_print_tlv_ip_reach (const u_char *cp, int length) */ static int -isis_print_ip_reach_subtlv (const u_char *tptr,int subt,int subl,const char *lf) { - - switch(subt) { - case SUBTLV_IP_REACH_ADMIN_TAG32: - if (!TTEST2(*tptr,4)) - goto trunctlv; - printf("%s32-Bit Administrative tag: 0x%08x", - lf, - EXTRACT_32BITS(tptr)); - break; - case SUBTLV_IP_REACH_ADMIN_TAG64: - if (!TTEST2(*tptr,8)) - goto trunctlv; - printf("%s64-Bit Administrative tag: 0x%08x%08x", - lf, - EXTRACT_32BITS(tptr), - EXTRACT_32BITS(tptr+4)); - break; - default: - printf("%sunknown subTLV, type %d, length %d", - lf, - subt, - subl); - if(!isis_print_unknown_data(tptr,"\n\t\t\t ", - subl)) - return(0); - break; - } - return(1); +isis_print_ip_reach_subtlv(netdissect_options *ndo, + const uint8_t *tptr, int subt, int subl, + const char *ident) +{ + /* first lets see if we know the subTLVs name*/ + ND_PRINT((ndo, "%s%s subTLV #%u, length: %u", + ident, tok2str(isis_ext_ip_reach_subtlv_values, "unknown", subt), + subt, subl)); + + if (!ND_TTEST2(*tptr,subl)) + goto trunctlv; + + switch(subt) { + case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */ + case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32: + while (subl >= 4) { + ND_PRINT((ndo, ", 0x%08x (=%u)", + EXTRACT_32BITS(tptr), + EXTRACT_32BITS(tptr))); + tptr+=4; + subl-=4; + } + break; + case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64: + while (subl >= 8) { + ND_PRINT((ndo, ", 0x%08x%08x", + EXTRACT_32BITS(tptr), + EXTRACT_32BITS(tptr+4))); + tptr+=8; + subl-=8; + } + break; + default: + if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl)) + return(0); + break; + } + return(1); trunctlv: - printf("%spacket exceeded snapshot",lf); + ND_PRINT((ndo, "%spacket exceeded snapshot", ident)); return(0); } /* * this is the common IS-REACH subTLV decoder it is called - * from various EXTD-IS REACH TLVs (22,24,222) + * from isis_print_ext_is_reach() */ static int -isis_print_is_reach_subtlv (const u_char *tptr,int subt,int subl,const char *lf) { +isis_print_is_reach_subtlv(netdissect_options *ndo, + const uint8_t *tptr, u_int subt, u_int subl, + const char *ident) +{ + u_int te_class,priority_level,gmpls_switch_cap; + union { /* int to float conversion buffer for several subTLVs */ + float f; + uint32_t i; + } bw; - int i,j; - float bw; /* copy buffer for several subTLVs */ + /* first lets see if we know the subTLVs name*/ + ND_PRINT((ndo, "%s%s subTLV #%u, length: %u", + ident, tok2str(isis_ext_is_reach_subtlv_values, "unknown", subt), + subt, subl)); + + if (!ND_TTEST2(*tptr,subl)) + goto trunctlv; switch(subt) { - case SUBTLV_EXT_IS_REACH_ADMIN_GROUP: - if (!TTEST2(*tptr,4)) - goto trunctlv; - printf("%sAdministrative groups: 0x%08x", - lf, - EXTRACT_32BITS(tptr)); + case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP: + case ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID: + case ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID: + if (subl >= 4) { + ND_PRINT((ndo, ", 0x%08x", EXTRACT_32BITS(tptr))); + if (subl == 8) /* rfc4205 */ + ND_PRINT((ndo, ", 0x%08x", EXTRACT_32BITS(tptr+4))); + } + break; + case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR: + case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR: + if (subl >= sizeof(struct in_addr)) + ND_PRINT((ndo, ", %s", ipaddr_string(ndo, tptr))); break; - case SUBTLV_EXT_IS_REACH_LINK_LOCAL_ID: - if (!TTEST2(*tptr,4)) - goto trunctlv; - printf("%sLink Local Identifier: 0x%08x", - lf, - EXTRACT_32BITS(tptr)); + case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW : + case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW: + if (subl >= 4) { + bw.i = EXTRACT_32BITS(tptr); + ND_PRINT((ndo, ", %.3f Mbps", bw.f * 8 / 1000000)); + } break; - case SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID: - if (!TTEST2(*tptr,4)) - goto trunctlv; - printf("%sLink Remote Identifier: 0x%08x", - lf, - EXTRACT_32BITS(tptr)); + case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW : + if (subl >= 32) { + for (te_class = 0; te_class < 8; te_class++) { + bw.i = EXTRACT_32BITS(tptr); + ND_PRINT((ndo, "%s TE-Class %u: %.3f Mbps", + ident, + te_class, + bw.f * 8 / 1000000)); + tptr+=4; + } + } break; - case SUBTLV_EXT_IS_REACH_MAX_LINK_BW : - if (!TTEST2(*tptr,4)) - goto trunctlv; - j = EXTRACT_32BITS(tptr); - memcpy (&bw, &j, 4); - printf("%sMaximum link bandwidth : %.3f Mbps", - lf, - bw*8/1000000 ); - break; - case SUBTLV_EXT_IS_REACH_RESERVABLE_BW : - if (!TTEST2(*tptr,4)) - goto trunctlv; - j = EXTRACT_32BITS(tptr); - memcpy (&bw, &j, 4); - printf("%sReservable link bandwidth: %.3f Mbps", - lf, - bw*8/1000000 ); + case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */ + case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD: + ND_PRINT((ndo, "%sBandwidth Constraints Model ID: %s (%u)", + ident, + tok2str(diffserv_te_bc_values, "unknown", *tptr), + *tptr)); + tptr++; + /* decode BCs until the subTLV ends */ + for (te_class = 0; te_class < (subl-1)/4; te_class++) { + bw.i = EXTRACT_32BITS(tptr); + ND_PRINT((ndo, "%s Bandwidth constraint CT%u: %.3f Mbps", + ident, + te_class, + bw.f * 8 / 1000000)); + tptr+=4; + } break; - case SUBTLV_EXT_IS_REACH_UNRESERVED_BW : - printf("%sUnreserved bandwidth:",lf); - for (i = 0; i < 8; i++) { - if (!TTEST2(*(tptr+i*4),4)) - goto trunctlv; - j = EXTRACT_32BITS(tptr); - memcpy (&bw, &j, 4); - printf("%s priority level %d: %.3f Mbps", - lf, - i, - bw*8/1000000 ); + case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC: + if (subl >= 3) + ND_PRINT((ndo, ", %u", EXTRACT_24BITS(tptr))); + break; + case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE: + if (subl == 2) { + ND_PRINT((ndo, ", [ %s ] (0x%04x)", + bittok2str(isis_subtlv_link_attribute_values, + "Unknown", + EXTRACT_16BITS(tptr)), + EXTRACT_16BITS(tptr))); } - break; - case SUBTLV_EXT_IS_REACH_TE_METRIC: - if (!TTEST2(*tptr,3)) - goto trunctlv; - printf("%sTraffic Engineering Metric: %d", - lf, - EXTRACT_24BITS(tptr)); - break; - case SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR: - if (!TTEST2(*tptr,4)) - goto trunctlv; - printf("%sIPv4 interface address: %s", - lf, - ipaddr_string(tptr)); - break; - case SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR: - if (!TTEST2(*tptr,4)) - goto trunctlv; - printf("%sIPv4 neighbor address: %s", - lf, - ipaddr_string(tptr)); break; - case SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE: - if (!TTEST2(*tptr,2)) - goto trunctlv; - i = 0; - j = (ISIS_8BIT_MASK(*tptr)); /* fetch the typecode and make sure - that no high-order LSBs are set */ - printf("%sLink Protection Type: %s", - lf, - (j) ? "" : "none" ); - /* scan through the bits until the typecode is zero */ - while(!j) { - printf("%s", isis_gmpls_link_prot_values[i]); - j=j>>1; - if (j) /*any other bit set ?*/ - printf(", "); - i++; + case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE: + if (subl >= 2) { + ND_PRINT((ndo, ", %s, Priority %u", + bittok2str(gmpls_link_prot_values, "none", *tptr), + *(tptr+1))); } - printf(", Priority %u", *(tptr+1)); break; - case SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR: - printf("%sInterface Switching Capability",lf); + case ISIS_SUBTLV_SPB_METRIC: + if (subl >= 6) { + ND_PRINT((ndo, ", LM: %u", EXTRACT_24BITS(tptr))); + tptr=tptr+3; + ND_PRINT((ndo, ", P: %u", *(tptr))); + tptr++; + ND_PRINT((ndo, ", P-ID: %u", EXTRACT_16BITS(tptr))); + } + break; + case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR: + if (subl >= 36) { + gmpls_switch_cap = *tptr; + ND_PRINT((ndo, "%s Interface Switching Capability:%s", + ident, + tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap))); + ND_PRINT((ndo, ", LSP Encoding: %s", + tok2str(gmpls_encoding_values, "Unknown", *(tptr + 1)))); + tptr+=4; + ND_PRINT((ndo, "%s Max LSP Bandwidth:", ident)); + for (priority_level = 0; priority_level < 8; priority_level++) { + bw.i = EXTRACT_32BITS(tptr); + ND_PRINT((ndo, "%s priority level %d: %.3f Mbps", + ident, + priority_level, + bw.f * 8 / 1000000)); + tptr+=4; + } + subl-=36; + switch (gmpls_switch_cap) { + case GMPLS_PSC1: + case GMPLS_PSC2: + case GMPLS_PSC3: + case GMPLS_PSC4: + bw.i = EXTRACT_32BITS(tptr); + ND_PRINT((ndo, "%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000)); + ND_PRINT((ndo, "%s Interface MTU: %u", ident, EXTRACT_16BITS(tptr + 4))); + break; + case GMPLS_TSC: + bw.i = EXTRACT_32BITS(tptr); + ND_PRINT((ndo, "%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000)); + ND_PRINT((ndo, "%s Indication %s", ident, + tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", *(tptr + 4)))); + break; + default: + /* there is some optional stuff left to decode but this is as of yet + not specified so just lets hexdump what is left */ + if(subl>0){ + if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl)) + return(0); + } + } + } + break; + default: + if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl)) + return(0); + break; + } + return(1); - if (!TTEST2(*tptr,1)) - goto trunctlv; - printf("%s Interface Switching Capability:%s", - lf, - tok2str(isis_gmpls_sw_cap_values, "Unknown", *(tptr))); +trunctlv: + ND_PRINT((ndo, "%spacket exceeded snapshot", ident)); + return(0); +} + + +/* + * this is the common IS-REACH decoder it is called + * from various EXTD-IS REACH style TLVs (22,24,222) + */ + +static int +isis_print_ext_is_reach(netdissect_options *ndo, + const uint8_t *tptr, const char *ident, int tlv_type) +{ + char ident_buffer[20]; + int subtlv_type,subtlv_len,subtlv_sum_len; + int proc_bytes = 0; /* how many bytes did we process ? */ + + if (!ND_TTEST2(*tptr, NODE_ID_LEN)) + return(0); + + ND_PRINT((ndo, "%sIS Neighbor: %s", ident, isis_print_id(tptr, NODE_ID_LEN))); + tptr+=(NODE_ID_LEN); + + if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */ + if (!ND_TTEST2(*tptr, 3)) /* and is therefore skipped */ + return(0); + ND_PRINT((ndo, ", Metric: %d", EXTRACT_24BITS(tptr))); + tptr+=3; + } + + if (!ND_TTEST2(*tptr, 1)) + return(0); + subtlv_sum_len=*(tptr++); /* read out subTLV length */ + proc_bytes=NODE_ID_LEN+3+1; + ND_PRINT((ndo, ", %ssub-TLVs present",subtlv_sum_len ? "" : "no ")); + if (subtlv_sum_len) { + ND_PRINT((ndo, " (%u)", subtlv_sum_len)); + while (subtlv_sum_len>0) { + if (!ND_TTEST2(*tptr,2)) + return(0); + subtlv_type=*(tptr++); + subtlv_len=*(tptr++); + /* prepend the ident string */ + snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident); + if (!isis_print_is_reach_subtlv(ndo, tptr, subtlv_type, subtlv_len, ident_buffer)) + return(0); + tptr+=subtlv_len; + subtlv_sum_len-=(subtlv_len+2); + proc_bytes+=(subtlv_len+2); + } + } + return(proc_bytes); +} + +/* + * this is the common Multi Topology ID decoder + * it is called from various MT-TLVs (222,229,235,237) + */ - if (!TTEST2(*(tptr+1),1)) - goto trunctlv; - printf(", LSP Encoding: %s", - tok2str(isis_gmpls_lsp_enc_values, "Unknown", *(tptr+1))); +static int +isis_print_mtid(netdissect_options *ndo, + const uint8_t *tptr, const char *ident) +{ + if (!ND_TTEST2(*tptr, 2)) + return(0); - if (!TTEST2(*(tptr+2),2)) /* skip 2 res. bytes */ - goto trunctlv; + ND_PRINT((ndo, "%s%s", + ident, + tok2str(isis_mt_values, + "Reserved for IETF Consensus", + ISIS_MASK_MTID(EXTRACT_16BITS(tptr))))); - printf("%s Max LSP Bandwidth:",lf); - for (i = 0; i < 8; i++) { - if (!TTEST2(*(tptr+(i*4)+4),4)) - goto trunctlv; - j = EXTRACT_32BITS(tptr); - memcpy (&bw, &j, 4); - printf("%s priority level %d: %.3f Mbps", - lf, - i, - bw*8/1000000 ); - } - subl-=36; - /* 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(!isis_print_unknown_data(tptr,"\n\t\t\t ", - subl-36)) - return(0); - } - break; - case 250: - case 251: - case 252: - case 253: - case 254: - printf("%sReserved for cisco specific extensions, type %d, length %d", - lf, - subt, - subl); - break; - case 255: - printf("%sReserved for future expansion, type %d, length %d", - lf, - subt, - subl); - break; - default: - printf("%sunknown subTLV, type %d, length %d", - lf, - subt, - subl); - if(!isis_print_unknown_data(tptr,"\n\t\t\t ", - subl)) - return(0); - break; - } - return(1); + ND_PRINT((ndo, " Topology (0x%03x), Flags: [%s]", + ISIS_MASK_MTID(EXTRACT_16BITS(tptr)), + bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(EXTRACT_16BITS(tptr))))); -trunctlv: - printf("%spacket exceeded snapshot",lf); - return(0); + return(2); } +/* + * this is the common extended IP reach decoder + * it is called from TLVs (135,235,236,237) + * we process the TLV and optional subTLVs and return + * the amount of processed bytes + */ + +static int +isis_print_extd_ip_reach(netdissect_options *ndo, + const uint8_t *tptr, const char *ident, uint16_t afi) +{ + char ident_buffer[20]; +#ifdef INET6 + uint8_t prefix[sizeof(struct in6_addr)]; /* shared copy buffer for IPv4 and IPv6 prefixes */ +#else + uint8_t prefix[sizeof(struct in_addr)]; /* shared copy buffer for IPv4 prefixes */ +#endif + u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen; + + if (!ND_TTEST2(*tptr, 4)) + return (0); + metric = EXTRACT_32BITS(tptr); + processed=4; + tptr+=4; + + if (afi == AF_INET) { + if (!ND_TTEST2(*tptr, 1)) /* fetch status byte */ + return (0); + status_byte=*(tptr++); + bit_length = status_byte&0x3f; + if (bit_length > 32) { + ND_PRINT((ndo, "%sIPv4 prefix: bad bit length %u", + ident, + bit_length)); + return (0); + } + processed++; +#ifdef INET6 + } else if (afi == AF_INET6) { + if (!ND_TTEST2(*tptr, 1)) /* fetch status & prefix_len byte */ + return (0); + status_byte=*(tptr++); + bit_length=*(tptr++); + if (bit_length > 128) { + ND_PRINT((ndo, "%sIPv6 prefix: bad bit length %u", + ident, + bit_length)); + return (0); + } + processed+=2; +#endif + } else + return (0); /* somebody is fooling us */ + + byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */ + + if (!ND_TTEST2(*tptr, byte_length)) + return (0); + memset(prefix, 0, sizeof prefix); /* clear the copy buffer */ + memcpy(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */ + tptr+=byte_length; + processed+=byte_length; + + if (afi == AF_INET) + ND_PRINT((ndo, "%sIPv4 prefix: %15s/%u", + ident, + ipaddr_string(ndo, prefix), + bit_length)); +#ifdef INET6 + if (afi == AF_INET6) + ND_PRINT((ndo, "%sIPv6 prefix: %s/%u", + ident, + ip6addr_string(ndo, prefix), + bit_length)); +#endif + + ND_PRINT((ndo, ", Distribution: %s, Metric: %u", + ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up", + metric)); + + if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte)) + ND_PRINT((ndo, ", sub-TLVs present")); +#ifdef INET6 + if (afi == AF_INET6) + ND_PRINT((ndo, ", %s%s", + ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal", + ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : "")); +#endif + + if ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte)) +#ifdef INET6 + || (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte)) +#endif + ) { + /* assume that one prefix can hold more + than one subTLV - therefore the first byte must reflect + the aggregate bytecount of the subTLVs for this prefix + */ + if (!ND_TTEST2(*tptr, 1)) + return (0); + sublen=*(tptr++); + processed+=sublen+1; + ND_PRINT((ndo, " (%u)", sublen)); /* print out subTLV length */ + + while (sublen>0) { + if (!ND_TTEST2(*tptr,2)) + return (0); + subtlvtype=*(tptr++); + subtlvlen=*(tptr++); + /* prepend the ident string */ + snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident); + if (!isis_print_ip_reach_subtlv(ndo, tptr, subtlvtype, subtlvlen, ident_buffer)) + return(0); + tptr+=subtlvlen; + sublen-=(subtlvlen+2); + } + } + return (processed); +} /* * isis_print * Decode IS-IS packets. Return 0 on error. */ -static int isis_print (const u_char *p, u_int length) +static int +isis_print(netdissect_options *ndo, + const uint8_t *p, u_int length) { - const struct isis_common_header *header; + 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; + struct isis_lsp_header *header_lsp; const struct isis_csnp_header *header_csnp; const struct isis_psnp_header *header_psnp; const struct isis_tlv_lsp *tlv_lsp; const struct isis_tlv_ptp_adj *tlv_ptp_adj; const struct isis_tlv_is_reach *tlv_is_reach; + const struct isis_tlv_es_reach *tlv_es_reach; + + uint8_t pdu_type, max_area, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len; + uint8_t ext_is_len, ext_ip_len, mt_len; + const uint8_t *optr, *pptr, *tptr; + u_short packet_len,pdu_len, key_id; + u_int i,vendor_id; + int sigcheck; - u_char pdu_type, max_area, id_length, type, len, tmp, alen, subl, subt, tslen; - const u_char *optr, *pptr, *tptr; - u_short packet_len,pdu_len,time_remain; - u_int i,j,bit_length,byte_length,metric,ra,rr; - u_char prefix[4]; /* copy buffer for ipv4 prefixes */ -#ifdef INET6 - u_char prefix6[16]; /* copy buffer for ipv6 prefixes */ -#endif packet_len=length; optr = p; /* initialize the _o_riginal pointer to the packet start - - need it for parsing the checksum TLV */ - header = (const struct isis_common_header *)p; - TCHECK(*header); - pptr = p+(ISIS_COMMON_HEADER_SIZE); + need it for parsing the checksum TLV and authentication + TLV verification */ + isis_header = (const struct isis_common_header *)p; + ND_TCHECK(*isis_header); + pptr = p+(ISIS_COMMON_HEADER_SIZE); header_iih_lan = (const struct isis_iih_lan_header *)pptr; header_iih_ptp = (const struct isis_iih_ptp_header *)pptr; - header_lsp = (const struct isis_lsp_header *)pptr; + header_lsp = (struct isis_lsp_header *)pptr; header_csnp = (const struct isis_csnp_header *)pptr; header_psnp = (const struct isis_psnp_header *)pptr; - + + if (!ndo->ndo_eflag) + ND_PRINT((ndo, "IS-IS")); + /* * Sanity checking of the header. */ - if (header->nlpid != NLPID_ISIS) { - printf(", coding error!"); - return (0); - } - if (header->version != ISIS_VERSION) { - printf(", version %d packet not supported", header->version); + if (isis_header->version != ISIS_VERSION) { + ND_PRINT((ndo, "version %d packet not supported", isis_header->version)); return (0); } - if ((header->id_length != SYSTEM_ID_LEN) && (header->id_length != 0)) { - printf(", system ID length of %d is not supported", - header->id_length); + if ((isis_header->id_length != SYSTEM_ID_LEN) && (isis_header->id_length != 0)) { + ND_PRINT((ndo, "system ID length of %d is not supported", + isis_header->id_length)); return (0); } - - if (header->pkt_version != ISIS_VERSION) { - printf(", version %d packet not supported", header->pkt_version); + + if (isis_header->pdu_version != ISIS_VERSION) { + ND_PRINT((ndo, "version %d packet not supported", isis_header->pdu_version)); return (0); } - max_area = header->max_area; + max_area = isis_header->max_area; switch(max_area) { case 0: max_area = 3; /* silly shit */ break; case 255: - printf(", bad packet -- 255 areas"); + ND_PRINT((ndo, "bad packet -- 255 areas")); return (0); default: break; } - id_length = header->id_length; + 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 1: /* 1-8 are valid sys-ID lenghts */ case 2: case 3: case 4: @@ -1168,850 +2152,985 @@ static int isis_print (const u_char *p, u_int length) id_length = 0; /* entirely useless */ break; default: - printf(", bad packet -- illegal sys-ID length (%u)", id_length); + break; + } + + /* toss any non 6-byte sys-ID len PDUs */ + if (id_length != 6 ) { + ND_PRINT((ndo, "bad packet -- illegal sys-ID length (%u)", id_length)); return (0); - break; } - printf(", hlen: %u, v: %u, sys-id-len: %u (%u), max-area: %u (%u)", - header->fixed_len, - header->version, + pdu_type=isis_header->pdu_type; + + /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/ + if (ndo->ndo_vflag < 1) { + ND_PRINT((ndo, "%s%s", + ndo->ndo_eflag ? "" : ", ", + tok2str(isis_pdu_values, "unknown PDU-Type %u", pdu_type))); + + switch (pdu_type) { + + case ISIS_PDU_L1_LAN_IIH: + case ISIS_PDU_L2_LAN_IIH: + ND_PRINT((ndo, ", src-id %s", + isis_print_id(header_iih_lan->source_id, SYSTEM_ID_LEN))); + ND_PRINT((ndo, ", lan-id %s, prio %u", + isis_print_id(header_iih_lan->lan_id,NODE_ID_LEN), + header_iih_lan->priority)); + break; + case ISIS_PDU_PTP_IIH: + ND_PRINT((ndo, ", src-id %s", isis_print_id(header_iih_ptp->source_id, SYSTEM_ID_LEN))); + break; + case ISIS_PDU_L1_LSP: + case ISIS_PDU_L2_LSP: + ND_PRINT((ndo, ", lsp-id %s, seq 0x%08x, lifetime %5us", + isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), + EXTRACT_32BITS(header_lsp->sequence_number), + EXTRACT_16BITS(header_lsp->remaining_lifetime))); + break; + case ISIS_PDU_L1_CSNP: + case ISIS_PDU_L2_CSNP: + ND_PRINT((ndo, ", src-id %s", isis_print_id(header_csnp->source_id, NODE_ID_LEN))); + break; + case ISIS_PDU_L1_PSNP: + case ISIS_PDU_L2_PSNP: + ND_PRINT((ndo, ", src-id %s", isis_print_id(header_psnp->source_id, NODE_ID_LEN))); + break; + + } + ND_PRINT((ndo, ", length %u", length)); + + return(1); + } + + /* ok they seem to want to know everything - lets fully decode it */ + ND_PRINT((ndo, "%slength %u", ndo->ndo_eflag ? "" : ", ", length)); + + ND_PRINT((ndo, "\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)", + tok2str(isis_pdu_values, + "unknown, type %u", + pdu_type), + isis_header->fixed_len, + isis_header->version, + isis_header->pdu_version, id_length, - header->id_length, + isis_header->id_length, max_area, - header->max_area); - - pdu_type=header->pdu_type; + isis_header->max_area)); + + if (ndo->ndo_vflag > 1) { + if (!print_unknown_data(ndo, optr, "\n\t", 8)) /* provide the _o_riginal pointer */ + return(0); /* for optionally debugging the common header */ + } - /* first lets see if we know the PDU name*/ - printf(", %s", - tok2str(isis_pdu_values, - "unknown PDU, type %d", - pdu_type)); - switch (pdu_type) { - case L1_LAN_IIH: - case L2_LAN_IIH: - if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) { - printf(", bogus fixed header length %u should be %lu", - header->fixed_len, (unsigned long)ISIS_IIH_LAN_HEADER_SIZE); + case ISIS_PDU_L1_LAN_IIH: + case ISIS_PDU_L2_LAN_IIH: + if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) { + ND_PRINT((ndo, ", bogus fixed header length %u should be %lu", + isis_header->fixed_len, (unsigned long)ISIS_IIH_LAN_HEADER_SIZE)); return (0); } pdu_len=EXTRACT_16BITS(header_iih_lan->pdu_len); if (packet_len>pdu_len) { - packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ - length=pdu_len; + packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ + length=pdu_len; } - TCHECK(*header_iih_lan); - printf("\n\t\t source-id: %s, holding time: %u, %s", - isis_print_sysid(header_iih_lan->source_id), + ND_TCHECK(*header_iih_lan); + ND_PRINT((ndo, "\n\t source-id: %s, holding time: %us, Flags: [%s]", + isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN), EXTRACT_16BITS(header_iih_lan->holding_time), tok2str(isis_iih_circuit_type_values, "unknown circuit type 0x%02x", - header_iih_lan->circuit_type)); + header_iih_lan->circuit_type))); - printf("\n\t\t lan-id: %s, Priority: %u, PDU length: %u", - isis_print_nodeid(header_iih_lan->lan_id), - (header_iih_lan->priority) & PRIORITY_MASK, - pdu_len); + ND_PRINT((ndo, "\n\t lan-id: %s, Priority: %u, PDU length: %u", + isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN), + (header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK, + pdu_len)); + + if (ndo->ndo_vflag > 1) { + if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_LAN_HEADER_SIZE)) + return(0); + } packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE); pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE); break; - case PTP_IIH: - if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) { - printf(", bogus fixed header length %u should be %lu", - header->fixed_len, (unsigned long)ISIS_IIH_PTP_HEADER_SIZE); + case ISIS_PDU_PTP_IIH: + if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) { + ND_PRINT((ndo, ", bogus fixed header length %u should be %lu", + isis_header->fixed_len, (unsigned long)ISIS_IIH_PTP_HEADER_SIZE)); return (0); } - + pdu_len=EXTRACT_16BITS(header_iih_ptp->pdu_len); if (packet_len>pdu_len) { - packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ - length=pdu_len; + packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ + length=pdu_len; } - - TCHECK(*header_iih_ptp); - printf("\n\t\t source-id: %s, holding time: %us, circuit-id: 0x%02x, %s, PDU length: %u", - isis_print_sysid(header_iih_ptp->source_id), + + ND_TCHECK(*header_iih_ptp); + ND_PRINT((ndo, "\n\t source-id: %s, holding time: %us, Flags: [%s]", + isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN), EXTRACT_16BITS(header_iih_ptp->holding_time), - header_iih_ptp->circuit_id, tok2str(isis_iih_circuit_type_values, "unknown circuit type 0x%02x", - header_iih_ptp->circuit_type), - pdu_len); + header_iih_ptp->circuit_type))); + + ND_PRINT((ndo, "\n\t circuit-id: 0x%02x, PDU length: %u", + header_iih_ptp->circuit_id, + pdu_len)); + + if (ndo->ndo_vflag > 1) { + if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_PTP_HEADER_SIZE)) + return(0); + } packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE); pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE); break; - case L1_LSP: - case L2_LSP: - if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) { - printf(", bogus fixed header length %u should be %lu", - header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE); + case ISIS_PDU_L1_LSP: + case ISIS_PDU_L2_LSP: + if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) { + ND_PRINT((ndo, ", bogus fixed header length %u should be %lu", + isis_header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE)); return (0); } - + pdu_len=EXTRACT_16BITS(header_lsp->pdu_len); if (packet_len>pdu_len) { - packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ - length=pdu_len; + packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ + length=pdu_len; } - TCHECK(*header_lsp); - printf("\n\t\t lsp-id: %s, seq: 0x%08x, lifetime: %5us", - isis_print_lspid(header_lsp->lsp_id), + ND_TCHECK(*header_lsp); + ND_PRINT((ndo, "\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x", + isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), EXTRACT_32BITS(header_lsp->sequence_number), - EXTRACT_16BITS(header_lsp->remaining_lifetime)); - /* verify the checksum - - * checking starts at the lsp-id field - * which is 12 bytes after the packet start*/ - printf("\n\t\t chksum: 0x%04x (%s), PDU length: %u", - EXTRACT_16BITS(header_lsp->checksum), - (osi_cksum(optr+12, length-12)) ? "incorrect" : "correct", - pdu_len); - - printf(", %s", ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : ""); + EXTRACT_16BITS(header_lsp->remaining_lifetime), + EXTRACT_16BITS(header_lsp->checksum))); + + + osi_print_cksum(ndo, (uint8_t *)header_lsp->lsp_id, + EXTRACT_16BITS(header_lsp->checksum), 12, length-12); + + /* + * Clear checksum and lifetime prior to signature verification. + */ + header_lsp->checksum[0] = 0; + header_lsp->checksum[1] = 0; + header_lsp->remaining_lifetime[0] = 0; + header_lsp->remaining_lifetime[1] = 0; + + + ND_PRINT((ndo, ", PDU length: %u, Flags: [ %s", + pdu_len, + ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : "")); if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) { - 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, "); + ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : "")); + ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : "")); + ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : "")); + ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : "")); + ND_PRINT((ndo, "ATT bit set, ")); + } + ND_PRINT((ndo, "%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : "")); + ND_PRINT((ndo, "%s ]", tok2str(isis_lsp_istype_values, "Unknown(0x%x)", + ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock)))); + + if (ndo->ndo_vflag > 1) { + if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_LSP_HEADER_SIZE)) + return(0); } - 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))); packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE); pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE); break; - case L1_CSNP: - case L2_CSNP: - if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) { - printf(", bogus fixed header length %u should be %lu", - header->fixed_len, (unsigned long)ISIS_CSNP_HEADER_SIZE); + case ISIS_PDU_L1_CSNP: + case ISIS_PDU_L2_CSNP: + if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) { + ND_PRINT((ndo, ", bogus fixed header length %u should be %lu", + isis_header->fixed_len, (unsigned long)ISIS_CSNP_HEADER_SIZE)); return (0); } - + pdu_len=EXTRACT_16BITS(header_csnp->pdu_len); if (packet_len>pdu_len) { - packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ - length=pdu_len; + packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ + length=pdu_len; } - TCHECK(*header_csnp); - printf("\n\t\t source-id: %s, PDU length: %u", - isis_print_nodeid(header_csnp->source_id), - pdu_len); - printf("\n\t\t start lsp-id: %s", - isis_print_lspid(header_csnp->start_lsp_id)); - printf("\n\t\t end lsp-id: %s", - isis_print_lspid(header_csnp->end_lsp_id)); + ND_TCHECK(*header_csnp); + ND_PRINT((ndo, "\n\t source-id: %s, PDU length: %u", + isis_print_id(header_csnp->source_id, NODE_ID_LEN), + pdu_len)); + ND_PRINT((ndo, "\n\t start lsp-id: %s", + isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN))); + ND_PRINT((ndo, "\n\t end lsp-id: %s", + isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN))); + + if (ndo->ndo_vflag > 1) { + if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_CSNP_HEADER_SIZE)) + return(0); + } packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE); pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE); break; - case L1_PSNP: - case L2_PSNP: - if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) { - printf("- bogus fixed header length %u should be %lu", - header->fixed_len, (unsigned long)ISIS_PSNP_HEADER_SIZE); + case ISIS_PDU_L1_PSNP: + case ISIS_PDU_L2_PSNP: + if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) { + ND_PRINT((ndo, "- bogus fixed header length %u should be %lu", + isis_header->fixed_len, (unsigned long)ISIS_PSNP_HEADER_SIZE)); return (0); } pdu_len=EXTRACT_16BITS(header_psnp->pdu_len); if (packet_len>pdu_len) { - packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ - length=pdu_len; + packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ + length=pdu_len; + } + + ND_TCHECK(*header_psnp); + ND_PRINT((ndo, "\n\t source-id: %s, PDU length: %u", + isis_print_id(header_psnp->source_id, NODE_ID_LEN), + pdu_len)); + + if (ndo->ndo_vflag > 1) { + if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_PSNP_HEADER_SIZE)) + return(0); } - TCHECK(*header_psnp); - printf("\n\t\t source-id: %s", - isis_print_nodeid(header_psnp->source_id)); - packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE); pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE); break; default: - if(!isis_print_unknown_data(pptr,"\n\t\t ",length)) - return(0); + (void)print_unknown_data(ndo, pptr, "\n\t ", length); return (0); } /* * Now print the TLV's. */ - + while (packet_len >= 2) { - if (pptr == snapend) { - return (1); + if (pptr == ndo->ndo_snapend) { + return (1); } - if (!TTEST2(*pptr, 2)) { - printf("\n\t\t\t packet exceeded snapshot (%ld) bytes", - (long)(pptr-snapend)); + if (!ND_TTEST2(*pptr, 2)) { + ND_PRINT((ndo, "\n\t\t packet exceeded snapshot (%ld) bytes", + (long)(pptr - ndo->ndo_snapend))); return (1); } - type = *pptr++; - len = *pptr++; - tmp =len; /* copy temporary len & pointer to packet data */ + tlv_type = *pptr++; + tlv_len = *pptr++; + tmp =tlv_len; /* copy temporary len & pointer to packet data */ tptr = pptr; packet_len -= 2; - if (len > packet_len) { + if (tlv_len > packet_len) { break; } - + /* first lets see if we know the TLVs name*/ - printf("\n\t\t %s TLV #%u, length: %u", + ND_PRINT((ndo, "\n\t %s TLV #%u, length: %u", tok2str(isis_tlv_values, "unknown", - type), - type, - len); + tlv_type), + tlv_type, + tlv_len)); + + if (tlv_len == 0) /* something is invalid */ + continue; /* now check if we have a decoder otherwise do a hexdump at the end*/ - switch (type) { - case TLV_AREA_ADDR: - if (!TTEST2(*tptr, 1)) + switch (tlv_type) { + case ISIS_TLV_AREA_ADDR: + if (!ND_TTEST2(*tptr, 1)) goto trunctlv; alen = *tptr++; while (tmp && alen < tmp) { - printf("\n\t\t\tArea address (%u): %s", + ND_PRINT((ndo, "\n\t Area address (length: %u): %s", alen, - print_nsap(tptr, alen)); + isonsap_string(ndo, 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)) + break; + if (!ND_TTEST2(*tptr, 1)) goto trunctlv; alen = *tptr++; } break; - case TLV_ISNEIGH: + case ISIS_TLV_ISNEIGH: while (tmp >= ETHER_ADDR_LEN) { - printf("\n\t\t\tIS Neighbor: %s",isis_print_sysid(tptr)); - tmp -= ETHER_ADDR_LEN; - tptr += ETHER_ADDR_LEN; + if (!ND_TTEST2(*tptr, ETHER_ADDR_LEN)) + goto trunctlv; + ND_PRINT((ndo, "\n\t SNPA: %s", isis_print_id(tptr, ETHER_ADDR_LEN))); + tmp -= ETHER_ADDR_LEN; + tptr += ETHER_ADDR_LEN; } break; - case TLV_PADDING: - break; - - case TLV_MT_IS_REACH: - while (tmp>0) { - if (!TTEST2(*tptr, 2)) - goto trunctlv; - printf("\n\t\t\t%s", - tok2str(isis_mt_values, - "Reserved for IETF Consensus", - ISIS_MASK_MTID(EXTRACT_16BITS(tptr)))); - - printf(" Topology (0x%03x)", - ISIS_MASK_MTID(EXTRACT_16BITS(tptr))); - tptr+=2; - printf("\n\t\t\t IS Neighbor: %s", isis_print_nodeid(tptr)); - tptr+=(SYSTEM_ID_LEN+1); - if (!TTEST2(*tptr, 3)) - goto trunctlv; - printf(", Metric: %d",EXTRACT_24BITS(tptr)); - tptr+=3; - if (!TTEST2(*tptr, 1)) + case ISIS_TLV_ISNEIGH_VARLEN: + if (!ND_TTEST2(*tptr, 1) || tmp < 3) /* min. TLV length */ + goto trunctlv; + lan_alen = *tptr++; /* LAN address length */ + if (lan_alen == 0) { + ND_PRINT((ndo, "\n\t LAN address length 0 bytes (invalid)")); + break; + } + tmp --; + ND_PRINT((ndo, "\n\t LAN address length %u bytes ", lan_alen)); + while (tmp >= lan_alen) { + if (!ND_TTEST2(*tptr, lan_alen)) goto trunctlv; - tslen=*(tptr++); - printf(", %ssub-TLVs present",tslen ? "" : "no "); - if (tslen) { - printf(" (%u)",tslen); - while (tslen>0) { - if (!TTEST2(*tptr,2)) - goto trunctlv; - subt=*(tptr++); - subl=*(tptr++); - if(!isis_print_is_reach_subtlv(tptr,subt,subl,"\n\t\t\t ")) - return(0); - tptr+=subl; - tslen-=(subl+2); - tmp-=(subl+2); - } - } - tmp-=(SYSTEM_ID_LEN+7); + ND_PRINT((ndo, "\n\t\tIS Neighbor: %s", isis_print_id(tptr, lan_alen))); + tmp -= lan_alen; + tptr +=lan_alen; } break; - case TLV_EXT_IS_REACH: - while (tmp>0) { - if (!TTEST2(*tptr, SYSTEM_ID_LEN+1)) - goto trunctlv; - printf("\n\t\t\tIS Neighbor: %s", isis_print_nodeid(tptr)); - tptr+=(SYSTEM_ID_LEN+1); + case ISIS_TLV_PADDING: + break; - if (!TTEST2(*tptr, 3)) + case ISIS_TLV_MT_IS_REACH: + mt_len = isis_print_mtid(ndo, tptr, "\n\t "); + if (mt_len == 0) /* did something go wrong ? */ + goto trunctlv; + tptr+=mt_len; + tmp-=mt_len; + while (tmp >= 2+NODE_ID_LEN+3+1) { + ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type); + if (ext_is_len == 0) /* did something go wrong ? */ goto trunctlv; - printf(", Metric: %d",EXTRACT_24BITS(tptr)); - tptr+=3; - if (!TTEST2(*tptr, 1)) - goto trunctlv; - tslen=*(tptr++); /* read out subTLV length */ - printf(", %ssub-TLVs present",tslen ? "" : "no "); - if (tslen) { - printf(" (%u)",tslen); - while (tslen>0) { - if (!TTEST2(*tptr,2)) - goto trunctlv; - subt=*(tptr++); - subl=*(tptr++); - if(!isis_print_is_reach_subtlv(tptr,subt,subl,"\n\t\t\t ")) - return(0); - tptr+=subl; - tslen-=(subl+2); - tmp-=(subl+2); - } - } - tmp-=(SYSTEM_ID_LEN+5); + tmp-=ext_is_len; + tptr+=ext_is_len; } break; - case 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\t\t%s", + case ISIS_TLV_IS_ALIAS_ID: + while (tmp >= NODE_ID_LEN+1) { /* is it worth attempting a decode ? */ + ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type); + if (ext_is_len == 0) /* did something go wrong ? */ + goto trunctlv; + tmp-=ext_is_len; + tptr+=ext_is_len; + } + break; + + case ISIS_TLV_EXT_IS_REACH: + while (tmp >= NODE_ID_LEN+3+1) { /* is it worth attempting a decode ? */ + ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type); + if (ext_is_len == 0) /* did something go wrong ? */ + goto trunctlv; + tmp-=ext_is_len; + tptr+=ext_is_len; + } + break; + case ISIS_TLV_IS_REACH: + if (!ND_TTEST2(*tptr,1)) /* check if there is one byte left to read out the virtual flag */ + goto trunctlv; + ND_PRINT((ndo, "\n\t %s", tok2str(isis_is_reach_virtual_values, "bogus virtual flag 0x%02x", - *tptr++)); - + *tptr++))); tlv_is_reach = (const struct isis_tlv_is_reach *)tptr; - while (tmp >= sizeof(struct isis_tlv_is_reach)) { - if (!TTEST(*tlv_is_reach)) + if (!ND_TTEST(*tlv_is_reach)) goto trunctlv; - - printf("\n\t\t\tIS Neighbor: %s", isis_print_nodeid(tlv_is_reach->neighbor_nodeid)); - printf(", Default Metric: %d, %s", - ISIS_LSP_TLV_METRIC_VALUE(tlv_is_reach->metric_default), - ISIS_LSP_TLV_METRIC_IE(tlv_is_reach->metric_default) ? "External" : "Internal"); - - if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_is_reach->metric_delay)) - printf("\n\t\t\t Delay Metric: %d, %s", - ISIS_LSP_TLV_METRIC_VALUE(tlv_is_reach->metric_delay), - ISIS_LSP_TLV_METRIC_IE(tlv_is_reach->metric_delay) ? "External" : "Internal"); - - if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_is_reach->metric_expense)) - printf("\n\t\t\t Expense Metric: %d, %s", - ISIS_LSP_TLV_METRIC_VALUE(tlv_is_reach->metric_expense), - ISIS_LSP_TLV_METRIC_IE(tlv_is_reach->metric_expense) ? "External" : "Internal"); - - if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_is_reach->metric_error)) - printf("\n\t\t\t Error Metric: %d, %s", - ISIS_LSP_TLV_METRIC_VALUE(tlv_is_reach->metric_error), - ISIS_LSP_TLV_METRIC_IE(tlv_is_reach->metric_error) ? "External" : "Internal"); - + ND_PRINT((ndo, "\n\t IS Neighbor: %s", + isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN))); + isis_print_metric_block(ndo, &tlv_is_reach->isis_metric_block); tmp -= sizeof(struct isis_tlv_is_reach); tlv_is_reach++; } break; - /* those two TLVs share the same format */ - case TLV_IP_REACH: - case TLV_IP_REACH_EXT: - if (!isis_print_tlv_ip_reach(pptr, len)) - return (1); - break; - - case TLV_MT_IP_REACH: - while (tmp>0) { - if (!TTEST2(*tptr, 2)) + case ISIS_TLV_ESNEIGH: + tlv_es_reach = (const struct isis_tlv_es_reach *)tptr; + while (tmp >= sizeof(struct isis_tlv_es_reach)) { + if (!ND_TTEST(*tlv_es_reach)) goto trunctlv; + ND_PRINT((ndo, "\n\t ES Neighbor: %s", + isis_print_id(tlv_es_reach->neighbor_sysid, SYSTEM_ID_LEN))); + isis_print_metric_block(ndo, &tlv_es_reach->isis_metric_block); + tmp -= sizeof(struct isis_tlv_es_reach); + tlv_es_reach++; + } + break; - printf("\n\t\t\t%s", - tok2str(isis_mt_values, - "Reserved for IETF Consensus", - ISIS_MASK_MTID(EXTRACT_16BITS(tptr)))); + /* those two TLVs share the same format */ + case ISIS_TLV_INT_IP_REACH: + case ISIS_TLV_EXT_IP_REACH: + if (!isis_print_tlv_ip_reach(ndo, pptr, "\n\t ", tlv_len)) + return (1); + break; - printf(" Topology (0x%03x)", - ISIS_MASK_MTID(EXTRACT_16BITS(tptr))); - tptr+=2; + case ISIS_TLV_EXTD_IP_REACH: + while (tmp>0) { + ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET); + if (ext_ip_len == 0) /* did something go wrong ? */ + goto trunctlv; + tptr+=ext_ip_len; + tmp-=ext_ip_len; + } + break; - memset (prefix, 0, 4); - if (!TTEST2(*tptr, 4)) - return (1); - metric = EXTRACT_32BITS(tptr); - tptr+=4; + case ISIS_TLV_MT_IP_REACH: + mt_len = isis_print_mtid(ndo, tptr, "\n\t "); + if (mt_len == 0) { /* did something go wrong ? */ + goto trunctlv; + } + tptr+=mt_len; + tmp-=mt_len; - if (!TTEST2(*tptr, 1)) /* fetch status byte */ - return (1); - j=*(tptr); - bit_length = (*(tptr)++&0x3f); - byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */ - - if (!TTEST2(*tptr, byte_length)) - return (1); - memcpy(prefix,tptr,byte_length); - tptr+=byte_length; - printf("\n\t\t\tIPv4 prefix: %s/%d", - ipaddr_string(prefix), - bit_length); - - printf("\n\t\t\t Metric: %u, Distribution: %s", - metric, - ISIS_MASK_TLV_EXT_IP_UPDOWN(j) ? "down" : "up"); - - printf(", %ssub-TLVs present", - ISIS_MASK_TLV_EXT_IP_SUBTLV(j) ? "" : "no "); - - if (ISIS_MASK_TLV_EXT_IP_SUBTLV(j)) { - /* 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 (1); - tslen=*(tptr++); - tmp--; - printf(" (%u)",tslen); /* print out subTLV length */ - - while (tslen>0) { - if (!TTEST2(*tptr,2)) - goto trunctlv; - subt=*(tptr++); - subl=*(tptr++); - if(!isis_print_ip_reach_subtlv(tptr,subt,subl,"\n\t\t\t ")) - return(0); - tptr+=subl; - tslen-=(subl+2); - tmp-=(subl+2); - } - } - tmp-=(7+byte_length); + while (tmp>0) { + ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET); + if (ext_ip_len == 0) /* did something go wrong ? */ + goto trunctlv; + tptr+=ext_ip_len; + tmp-=ext_ip_len; } break; - case TLV_EXT_IP_REACH: +#ifdef INET6 + case ISIS_TLV_IP6_REACH: while (tmp>0) { - memset (prefix, 0, 4); - if (!TTEST2(*tptr, 4)) - return (1); - metric = EXTRACT_32BITS(tptr); - tptr+=4; - - if (!TTEST2(*tptr, 1)) /* fetch status byte */ - return (1); - j=*(tptr); - bit_length = (*(tptr)++&0x3f); - byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */ - - if (!TTEST2(*tptr, byte_length)) - return (1); - memcpy(prefix,tptr,byte_length); - tptr+=byte_length; - printf("\n\t\t\tIPv4 prefix: %s/%d", - ipaddr_string(prefix), - bit_length); - - printf("\n\t\t\t Metric: %u, Distribution: %s", - metric, - ISIS_MASK_TLV_EXT_IP_UPDOWN(j) ? "down" : "up"); - - printf(", %ssub-TLVs present", - ISIS_MASK_TLV_EXT_IP_SUBTLV(j) ? "" : "no "); - - if (ISIS_MASK_TLV_EXT_IP_SUBTLV(j)) { - /* 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 (1); - tslen=*(tptr++); - tmp--; - printf(" (%u)",tslen); /* print out subTLV length */ - - while (tslen>0) { - if (!TTEST2(*tptr,2)) - goto trunctlv; - subt=*(tptr++); - subl=*(tptr++); - if(!isis_print_ip_reach_subtlv(tptr,subt,subl,"\n\t\t\t ")) - return(0); - tptr+=subl; - tslen-=(subl+2); - tmp-=(subl+2); - } - } - tmp-=(5+byte_length); + ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6); + if (ext_ip_len == 0) /* did something go wrong ? */ + goto trunctlv; + tptr+=ext_ip_len; + tmp-=ext_ip_len; } break; -#ifdef INET6 + case ISIS_TLV_MT_IP6_REACH: + mt_len = isis_print_mtid(ndo, tptr, "\n\t "); + if (mt_len == 0) { /* did something go wrong ? */ + goto trunctlv; + } + tptr+=mt_len; + tmp-=mt_len; - case TLV_IP6_REACH: while (tmp>0) { - if (!TTEST2(*tptr, 4)) - return (1); - metric = EXTRACT_32BITS(tptr); - tptr+=4; - - if (!TTEST2(*tptr, 2)) - return (1); - j=*(tptr++); - bit_length = (*(tptr)++); - byte_length = (bit_length + 7) / 8; - if (!TTEST2(*tptr, byte_length)) - return (1); - - memset(prefix6, 0, 16); - memcpy(prefix6,tptr,byte_length); - tptr+=byte_length; - printf("\n\t\t\tIPv6 prefix: %s/%u", - ip6addr_string(prefix6), - bit_length); - - printf("\n\t\t\t Metric: %u, %s, Distribution: %s, %ssub-TLVs present", - metric, - ISIS_MASK_TLV_IP6_IE(j) ? "External" : "Internal", - ISIS_MASK_TLV_IP6_UPDOWN(j) ? "down" : "up", - ISIS_MASK_TLV_IP6_SUBTLV(j) ? "" : "no "); - - if (ISIS_MASK_TLV_IP6_SUBTLV(j)) { - /* 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 (1); - tslen=*(tptr++); - tmp--; - printf(" (%u)",tslen); /* print out subTLV length */ - - while (tslen>0) { - if (!TTEST2(*tptr,2)) - goto trunctlv; - subt=*(tptr++); - subl=*(tptr++); - if(!isis_print_ip_reach_subtlv(tptr,subt,subl,"\n\t\t\t ")) - return(0); - tptr+=subl; - tslen-=(subl+2); - tmp-=(subl+2); - } - } - tmp-=(6+byte_length); + ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6); + if (ext_ip_len == 0) /* did something go wrong ? */ + goto trunctlv; + tptr+=ext_ip_len; + tmp-=ext_ip_len; } - break; -#endif -#ifdef INET6 - case TLV_IP6ADDR: - while (tmp>0) { - if (!TTEST2(*tptr, 16)) + case ISIS_TLV_IP6ADDR: + while (tmp>=sizeof(struct in6_addr)) { + if (!ND_TTEST2(*tptr, sizeof(struct in6_addr))) goto trunctlv; - printf("\n\t\t\tIPv6 interface address: %s", - ip6addr_string(tptr)); + ND_PRINT((ndo, "\n\t IPv6 interface address: %s", + ip6addr_string(ndo, tptr))); - tptr += 16; - tmp -= 16; + tptr += sizeof(struct in6_addr); + tmp -= sizeof(struct in6_addr); } break; #endif - case TLV_AUTH: - if (!TTEST2(*tptr, 1)) + case ISIS_TLV_AUTH: + if (!ND_TTEST2(*tptr, 1)) goto trunctlv; - printf("\n\t\t\t%s: ", + ND_PRINT((ndo, "\n\t %s: ", tok2str(isis_subtlv_auth_values, "unknown Authentication type 0x%02x", - *tptr)); + *tptr))); switch (*tptr) { - case SUBTLV_AUTH_SIMPLE: - for(i=1;i=1) { - if (!TTEST2(*tptr, 1)) + if (!ND_TTEST2(*tptr, 1)) goto trunctlv; - printf("\n\t\t\tAdjacency State: %s", - tok2str(isis_ptp_adjancey_values, "0x%02x", *tptr)); + ND_PRINT((ndo, "\n\t Adjacency State: %s (%u)", + tok2str(isis_ptp_adjancey_values, "unknown", *tptr), + *tptr)); tmp--; } - if(tmp>=4) { - if (!TTEST2(tlv_ptp_adj->ext_local_circuit_id, 4)) + if(tmp>sizeof(tlv_ptp_adj->extd_local_circuit_id)) { + if (!ND_TTEST2(tlv_ptp_adj->extd_local_circuit_id, + sizeof(tlv_ptp_adj->extd_local_circuit_id))) goto trunctlv; - printf("\n\t\t\tExtended Local circuit ID: 0x%08x", - EXTRACT_32BITS(tlv_ptp_adj->ext_local_circuit_id)); - tmp-=4; + ND_PRINT((ndo, "\n\t Extended Local circuit-ID: 0x%08x", + EXTRACT_32BITS(tlv_ptp_adj->extd_local_circuit_id))); + tmp-=sizeof(tlv_ptp_adj->extd_local_circuit_id); } - if(tmp>=6) { - if (!TTEST2(tlv_ptp_adj->neighbor_sysid, 6)) + if(tmp>=SYSTEM_ID_LEN) { + if (!ND_TTEST2(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN)) goto trunctlv; - printf("\n\t\t\tNeighbor SystemID: %s", - isis_print_sysid(tlv_ptp_adj->neighbor_sysid)); - tmp-=6; + ND_PRINT((ndo, "\n\t Neighbor System-ID: %s", + isis_print_id(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN))); + tmp-=SYSTEM_ID_LEN; } - if(tmp>=4) { - if (!TTEST2(tlv_ptp_adj->neighbor_ext_local_circuit_id, 4)) + if(tmp>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) { + if (!ND_TTEST2(tlv_ptp_adj->neighbor_extd_local_circuit_id, + sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id))) goto trunctlv; - printf("\n\t\t\tNeighbor Extended Local circuit ID: 0x%08x", - EXTRACT_32BITS(tlv_ptp_adj->neighbor_ext_local_circuit_id)); + ND_PRINT((ndo, "\n\t Neighbor Extended Local circuit-ID: 0x%08x", + EXTRACT_32BITS(tlv_ptp_adj->neighbor_extd_local_circuit_id))); } break; - case TLV_PROTOCOLS: - printf("\n\t\t\tNLPID(s): "); + case ISIS_TLV_PROTOCOLS: + ND_PRINT((ndo, "\n\t NLPID(s): ")); while (tmp>0) { - if (!TTEST2(*(tptr), 1)) + if (!ND_TTEST2(*(tptr), 1)) goto trunctlv; - printf("%s", - tok2str(isis_nlpid_values, - "Unknown 0x%02x", - *tptr++)); + ND_PRINT((ndo, "%s (0x%02x)", + tok2str(nlpid_values, + "unknown", + *tptr), + *tptr)); if (tmp>1) /* further NPLIDs ? - put comma */ - printf(", "); + ND_PRINT((ndo, ", ")); + tptr++; tmp--; } break; - case TLV_TE_ROUTER_ID: - if (!TTEST2(*pptr, 4)) + case ISIS_TLV_MT_PORT_CAP: + { + if (!ND_TTEST2(*(tptr), 2)) + goto trunctlv; + + ND_PRINT((ndo, "\n\t RES: %d, MTID(s): %d", + (EXTRACT_16BITS (tptr) >> 12), + (EXTRACT_16BITS (tptr) & 0x0fff))); + + tmp = tmp-2; + tptr = tptr+2; + + if (tmp) + isis_print_mt_port_cap_subtlv(ndo, tptr, tmp); + + break; + } + + case ISIS_TLV_MT_CAPABILITY: + + if (!ND_TTEST2(*(tptr), 2)) + goto trunctlv; + + ND_PRINT((ndo, "\n\t O: %d, RES: %d, MTID(s): %d", + (EXTRACT_16BITS(tptr) >> 15) & 0x01, + (EXTRACT_16BITS(tptr) >> 12) & 0x07, + EXTRACT_16BITS(tptr) & 0x0fff)); + + tmp = tmp-2; + tptr = tptr+2; + + if (tmp) + isis_print_mt_capability_subtlv(ndo, tptr, tmp); + + break; + + case ISIS_TLV_TE_ROUTER_ID: + if (!ND_TTEST2(*pptr, sizeof(struct in_addr))) goto trunctlv; - printf("\n\t\t\tTraffic Engineering Router ID: %s", ipaddr_string(pptr)); + ND_PRINT((ndo, "\n\t Traffic Engineering Router ID: %s", ipaddr_string(ndo, pptr))); break; - case TLV_IPADDR: - while (tmp>0) { - if (!TTEST2(*tptr, 4)) + case ISIS_TLV_IPADDR: + while (tmp>=sizeof(struct in_addr)) { + if (!ND_TTEST2(*tptr, sizeof(struct in_addr))) goto trunctlv; - printf("\n\t\t\tIPv4 interface address: %s", ipaddr_string(tptr)); - tptr += 4; - tmp -= 4; + ND_PRINT((ndo, "\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr))); + tptr += sizeof(struct in_addr); + tmp -= sizeof(struct in_addr); } break; - case TLV_HOSTNAME: - printf("\n\t\t\tHostname: "); + case ISIS_TLV_HOSTNAME: + ND_PRINT((ndo, "\n\t Hostname: ")); while (tmp>0) { - if (!TTEST2(*tptr, 1)) + if (!ND_TTEST2(*tptr, 1)) goto trunctlv; - printf("%c",*tptr++); + ND_PRINT((ndo, "%c", *tptr++)); tmp--; } break; - case TLV_SHARED_RISK_GROUP: - if (!TTEST2(*tptr, 7)) - goto trunctlv; - printf("\n\t\t\tIS Neighbor: %s", isis_print_nodeid(tptr)); - tptr+=(SYSTEM_ID_LEN+1); - len-=(SYSTEM_ID_LEN+1); - - if (!TTEST2(*tptr, 1)) - goto trunctlv; - printf(", %s", ISIS_MASK_TLV_SHARED_RISK_GROUP(*tptr++) ? "numbered" : "unnumbered"); - len--; - - if (!TTEST2(*tptr,4)) - goto trunctlv; - printf("\n\t\t\tIPv4 interface address: %s", ipaddr_string(tptr)); - tptr+=4; - len-=4; + case ISIS_TLV_SHARED_RISK_GROUP: + if (tmp < NODE_ID_LEN) + break; + if (!ND_TTEST2(*tptr, NODE_ID_LEN)) + goto trunctlv; + ND_PRINT((ndo, "\n\t IS Neighbor: %s", isis_print_id(tptr, NODE_ID_LEN))); + tptr+=(NODE_ID_LEN); + tmp-=(NODE_ID_LEN); - if (!TTEST2(*tptr,4)) - goto trunctlv; - printf("\n\t\t\tIPv4 neighbor address: %s", ipaddr_string(tptr)); - tptr+=4; - len-=4; + if (tmp < 1) + break; + if (!ND_TTEST2(*tptr, 1)) + goto trunctlv; + ND_PRINT((ndo, ", Flags: [%s]", ISIS_MASK_TLV_SHARED_RISK_GROUP(*tptr++) ? "numbered" : "unnumbered")); + tmp--; - while (tmp>0) { - if (!TTEST2(*tptr, 4)) - goto trunctlv; - printf("\n\t\t\tLink-ID: 0x%08x", EXTRACT_32BITS(tptr)); - tptr+=4; - len-=4; + if (tmp < sizeof(struct in_addr)) + break; + if (!ND_TTEST2(*tptr, sizeof(struct in_addr))) + goto trunctlv; + ND_PRINT((ndo, "\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr))); + tptr+=sizeof(struct in_addr); + tmp-=sizeof(struct in_addr); + + if (tmp < sizeof(struct in_addr)) + break; + if (!ND_TTEST2(*tptr, sizeof(struct in_addr))) + goto trunctlv; + ND_PRINT((ndo, "\n\t IPv4 neighbor address: %s", ipaddr_string(ndo, tptr))); + tptr+=sizeof(struct in_addr); + tmp-=sizeof(struct in_addr); + + while (tmp>=4) { + if (!ND_TTEST2(*tptr, 4)) + goto trunctlv; + ND_PRINT((ndo, "\n\t Link-ID: 0x%08x", EXTRACT_32BITS(tptr))); + tptr+=4; + tmp-=4; } break; - case TLV_LSP: - tlv_lsp = (const struct isis_tlv_lsp *)tptr; - while(tmp>0) { - printf("\n\t\t\tlsp-id: %s", - isis_print_nodeid(tlv_lsp->lsp_id)); - if (!TTEST((tlv_lsp->lsp_id)[SYSTEM_ID_LEN+1])) + case ISIS_TLV_LSP: + tlv_lsp = (const struct isis_tlv_lsp *)tptr; + while(tmp>=sizeof(struct isis_tlv_lsp)) { + if (!ND_TTEST((tlv_lsp->lsp_id)[LSP_ID_LEN-1])) goto trunctlv; - printf("-%02x",(tlv_lsp->lsp_id)[SYSTEM_ID_LEN+1]); - if (!TTEST2(tlv_lsp->sequence_number, 4)) + ND_PRINT((ndo, "\n\t lsp-id: %s", + isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN))); + if (!ND_TTEST2(tlv_lsp->sequence_number, 4)) goto trunctlv; - printf(", seq: 0x%08x",EXTRACT_32BITS(tlv_lsp->sequence_number)); - if (!TTEST2(tlv_lsp->remaining_lifetime, 2)) + ND_PRINT((ndo, ", seq: 0x%08x", EXTRACT_32BITS(tlv_lsp->sequence_number))); + if (!ND_TTEST2(tlv_lsp->remaining_lifetime, 2)) goto trunctlv; - printf(", lifetime: %5ds",EXTRACT_16BITS(tlv_lsp->remaining_lifetime)); - if (!TTEST2(tlv_lsp->checksum, 2)) + ND_PRINT((ndo, ", lifetime: %5ds", EXTRACT_16BITS(tlv_lsp->remaining_lifetime))); + if (!ND_TTEST2(tlv_lsp->checksum, 2)) goto trunctlv; - printf(", chksum: 0x%04x",EXTRACT_16BITS(tlv_lsp->checksum)); + ND_PRINT((ndo, ", chksum: 0x%04x", EXTRACT_16BITS(tlv_lsp->checksum))); tmp-=sizeof(struct isis_tlv_lsp); tlv_lsp++; } break; - case TLV_CHECKSUM: - if (!TTEST2(*tptr, 2)) + case ISIS_TLV_CHECKSUM: + if (tmp < ISIS_TLV_CHECKSUM_MINLEN) + break; + if (!ND_TTEST2(*tptr, ISIS_TLV_CHECKSUM_MINLEN)) goto trunctlv; - printf("\n\t\t\tchecksum: 0x%04x (%s)", - EXTRACT_16BITS(tptr), - (osi_cksum(optr, length)) ? "incorrect" : "correct"); + ND_PRINT((ndo, "\n\t checksum: 0x%04x ", EXTRACT_16BITS(tptr))); + /* do not attempt to verify the checksum if it is zero + * most likely a HMAC-MD5 TLV is also present and + * to avoid conflicts the checksum TLV is zeroed. + * see rfc3358 for details + */ + osi_print_cksum(ndo, optr, EXTRACT_16BITS(tptr), tptr-optr, length); + break; + + case ISIS_TLV_POI: + if (tlv_len >= SYSTEM_ID_LEN + 1) { + if (!ND_TTEST2(*tptr, SYSTEM_ID_LEN + 1)) + goto trunctlv; + ND_PRINT((ndo, "\n\t Purge Originator System-ID: %s", + isis_print_id(tptr + 1, SYSTEM_ID_LEN))); + } + + if (tlv_len == 2 * SYSTEM_ID_LEN + 1) { + if (!ND_TTEST2(*tptr, 2 * SYSTEM_ID_LEN + 1)) + goto trunctlv; + ND_PRINT((ndo, "\n\t Received from System-ID: %s", + isis_print_id(tptr + SYSTEM_ID_LEN + 1, SYSTEM_ID_LEN))); + } break; - case TLV_MT_SUPPORTED: + 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 + /* length can only be a multiple of 2, otherwise there is something broken -> so decode down until length is 1 */ if (tmp!=1) { - if (!TTEST2(*tptr, 2)) - goto trunctlv; - printf("\n\t\t\t%s", - tok2str(isis_mt_values, - "Reserved for IETF Consensus", - ISIS_MASK_MTID(EXTRACT_16BITS(tptr)))); - - printf(" Topology (0x%03x)%s%s", - ISIS_MASK_MTID(EXTRACT_16BITS(tptr)), - ISIS_MASK_MTSUB(EXTRACT_16BITS(tptr)) ? "" : ", no sub-TLVs present", - ISIS_MASK_MTATT(EXTRACT_16BITS(tptr)) ? ", ATT bit set" : "" ); + mt_len = isis_print_mtid(ndo, tptr, "\n\t "); + if (mt_len == 0) /* did something go wrong ? */ + goto trunctlv; + tptr+=mt_len; + tmp-=mt_len; } else { - printf("\n\t\t\tmalformed MT-ID"); + ND_PRINT((ndo, "\n\t invalid MT-ID")); break; } - tmp-=2; - tptr+=2; } break; - case TLV_RESTART_SIGNALING: - if (!TTEST2(*tptr, 3)) - goto trunctlv; - rr = ISIS_MASK_TLV_RESTART_RR(*tptr); - ra = ISIS_MASK_TLV_RESTART_RA(*tptr); - tptr++; - time_remain = EXTRACT_16BITS(tptr); - printf("\n\t\t\tRestart Request bit %s, Restart Acknowledgement bit %s\n\t\t\tRemaining holding time: %us", - rr ? "set" : "clear", ra ? "set" : "clear", time_remain); + case ISIS_TLV_RESTART_SIGNALING: + /* first attempt to decode the flags */ + if (tmp < ISIS_TLV_RESTART_SIGNALING_FLAGLEN) + break; + if (!ND_TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN)) + goto trunctlv; + ND_PRINT((ndo, "\n\t Flags [%s]", + bittok2str(isis_restart_flag_values, "none", *tptr))); + tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN; + tmp-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN; + + /* is there anything other than the flags field? */ + if (tmp == 0) + break; + + if (tmp < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN) + break; + if (!ND_TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN)) + goto trunctlv; + + ND_PRINT((ndo, ", Remaining holding time %us", EXTRACT_16BITS(tptr))); + tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN; + tmp-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN; + + /* is there an additional sysid field present ?*/ + if (tmp == SYSTEM_ID_LEN) { + if (!ND_TTEST2(*tptr, SYSTEM_ID_LEN)) + goto trunctlv; + ND_PRINT((ndo, ", for %s", isis_print_id(tptr,SYSTEM_ID_LEN))); + } break; - case TLV_IDRP_INFO: - if (!TTEST2(*tptr, 1)) + case ISIS_TLV_IDRP_INFO: + if (tmp < ISIS_TLV_IDRP_INFO_MINLEN) + break; + if (!ND_TTEST2(*tptr, ISIS_TLV_IDRP_INFO_MINLEN)) goto trunctlv; - printf("\n\t\t\tInter-Domain Information Type: %s", + ND_PRINT((ndo, "\n\t Inter-Domain Information Type: %s", tok2str(isis_subtlv_idrp_values, "Unknown (0x%02x)", - *tptr)); + *tptr))); switch (*tptr++) { - case SUBTLV_IDRP_ASN: - if (!TTEST2(*tptr, 2)) /* fetch AS number */ + case ISIS_SUBTLV_IDRP_ASN: + if (!ND_TTEST2(*tptr, 2)) /* fetch AS number */ goto trunctlv; - printf("AS Number: %u",EXTRACT_16BITS(tptr)); + ND_PRINT((ndo, "AS Number: %u", EXTRACT_16BITS(tptr))); break; - case SUBTLV_IDRP_LOCAL: - case SUBTLV_IDRP_RES: + case ISIS_SUBTLV_IDRP_LOCAL: + case ISIS_SUBTLV_IDRP_RES: default: - if(!isis_print_unknown_data(tptr,"\n\t\t\t",len-1)) + if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_len - 1)) return(0); break; } break; - case TLV_LSP_BUFFERSIZE: - if (!TTEST2(*tptr, 2)) - goto trunctlv; - printf("LSP Buffersize: %u",EXTRACT_16BITS(tptr)); + case ISIS_TLV_LSP_BUFFERSIZE: + if (tmp < ISIS_TLV_LSP_BUFFERSIZE_MINLEN) + break; + if (!ND_TTEST2(*tptr, ISIS_TLV_LSP_BUFFERSIZE_MINLEN)) + goto trunctlv; + ND_PRINT((ndo, "\n\t LSP Buffersize: %u", EXTRACT_16BITS(tptr))); + break; + + case ISIS_TLV_PART_DIS: + while (tmp >= SYSTEM_ID_LEN) { + if (!ND_TTEST2(*tptr, SYSTEM_ID_LEN)) + goto trunctlv; + ND_PRINT((ndo, "\n\t %s", isis_print_id(tptr, SYSTEM_ID_LEN))); + tptr+=SYSTEM_ID_LEN; + tmp-=SYSTEM_ID_LEN; + } + break; + + case ISIS_TLV_PREFIX_NEIGH: + if (tmp < sizeof(struct isis_metric_block)) + break; + if (!ND_TTEST2(*tptr, sizeof(struct isis_metric_block))) + goto trunctlv; + ND_PRINT((ndo, "\n\t Metric Block")); + isis_print_metric_block(ndo, (const struct isis_metric_block *)tptr); + tptr+=sizeof(struct isis_metric_block); + tmp-=sizeof(struct isis_metric_block); + + while(tmp>0) { + if (!ND_TTEST2(*tptr, 1)) + goto trunctlv; + prefix_len=*tptr++; /* read out prefix length in semioctets*/ + if (prefix_len < 2) { + ND_PRINT((ndo, "\n\t\tAddress: prefix length %u < 2", prefix_len)); + break; + } + tmp--; + if (tmp < prefix_len/2) + break; + if (!ND_TTEST2(*tptr, prefix_len / 2)) + goto trunctlv; + ND_PRINT((ndo, "\n\t\tAddress: %s/%u", + isonsap_string(ndo, tptr, prefix_len / 2), prefix_len * 4)); + tptr+=prefix_len/2; + tmp-=prefix_len/2; + } + break; + + case ISIS_TLV_IIH_SEQNR: + if (tmp < ISIS_TLV_IIH_SEQNR_MINLEN) + break; + if (!ND_TTEST2(*tptr, ISIS_TLV_IIH_SEQNR_MINLEN)) /* check if four bytes are on the wire */ + goto trunctlv; + ND_PRINT((ndo, "\n\t Sequence number: %u", EXTRACT_32BITS(tptr))); break; + case ISIS_TLV_VENDOR_PRIVATE: + if (tmp < ISIS_TLV_VENDOR_PRIVATE_MINLEN) + break; + if (!ND_TTEST2(*tptr, ISIS_TLV_VENDOR_PRIVATE_MINLEN)) /* check if enough byte for a full oui */ + goto trunctlv; + vendor_id = EXTRACT_24BITS(tptr); + ND_PRINT((ndo, "\n\t Vendor: %s (%u)", + tok2str(oui_values, "Unknown", vendor_id), + vendor_id)); + tptr+=3; + tmp-=3; + if (tmp > 0) /* hexdump the rest */ + if (!print_unknown_data(ndo, tptr, "\n\t\t", tmp)) + return(0); + break; /* * FIXME those are the defined TLVs that lack a decoder * you are welcome to contribute code ;-) */ - case TLV_ESNEIGH: - case TLV_PART_DIS: - case TLV_SUMMARY: - case TLV_IS_ALIAS_ID: - case TLV_DECNET_PHASE4: - case TLV_LUCENT_PRIVATE: - case TLV_IPAUTH: - case TLV_NORTEL_PRIVATE1: - case TLV_NORTEL_PRIVATE2: - case TLV_MT_IP6_REACH: + 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(!isis_print_unknown_data(pptr,"\n\t\t\t",len)) - return(0); - break; + if (ndo->ndo_vflag <= 1) { + if (!print_unknown_data(ndo, pptr, "\n\t\t", tlv_len)) + return(0); + } + break; + } + /* do we want to see an additionally hexdump ? */ + if (ndo->ndo_vflag> 1) { + if (!print_unknown_data(ndo, pptr, "\n\t ", tlv_len)) + return(0); } - pptr += len; - packet_len -= len; + pptr += tlv_len; + packet_len -= tlv_len; } if (packet_len != 0) { - printf("\n\t\t\t %d straggler bytes", packet_len); + ND_PRINT((ndo, "\n\t %u straggler bytes", packet_len)); } return (1); -trunc: - fputs("[|isis]", stdout); + trunc: + ND_PRINT((ndo, "[|isis]")); return (1); -trunctlv: - printf("\n\t\t\t packet exceeded snapshot"); + trunctlv: + ND_PRINT((ndo, "\n\t\t packet exceeded snapshot")); return(1); } -/* - * Verify the checksum. See 8473-1, Appendix C, section C.4. - */ - -static int -osi_cksum(const u_char *tptr, u_int len) +static void +osi_print_cksum(netdissect_options *ndo, const uint8_t *pptr, + uint16_t checksum, int checksum_offset, int length) { - int32_t c0 = 0, c1 = 0; - - while ((int)--len >= 0) { - c0 += *tptr++; - c0 %= 255; - c1 += c0; - c1 %= 255; - } - return (c0 | c1); + uint16_t calculated_checksum; + + /* do not attempt to verify the checksum if it is zero, + * if the total length is nonsense, + * if the offset is nonsense, + * or the base pointer is not sane + */ + if (!checksum + || length < 0 + || checksum_offset < 0 + || length > ndo->ndo_snaplen + || checksum_offset > ndo->ndo_snaplen + || checksum_offset > length) { + ND_PRINT((ndo, " (unverified)")); + } else { + const char *truncated = "trunc"; +#if 0 + printf("\nosi_print_cksum: %p %u %u %u\n", pptr, checksum_offset, length, ndo->ndo_snaplen); + ND_TCHECK2(pptr, checksum_offset+length); +#endif + calculated_checksum = create_osi_cksum(pptr, checksum_offset, length); + if (checksum == calculated_checksum) { + ND_PRINT((ndo, " (correct)")); + } else { + truncated = "incorrect"; +#if 0 + trunc: +#endif + ND_PRINT((ndo, " (%s should be 0x%04x)", truncated, calculated_checksum)); + } + } } + +/* + * Local Variables: + * c-style: whitesmith + * c-basic-offset: 8 + * End: + */