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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 17:13:01 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 17:13:01 +0000
commit7adcb5b605cc1328a3084c334f4697ec9771936c (patch)
tree03e681bfda053978ba896745828e09cb056ad156 /print-isoclns.c
parentInitial commit. (diff)
downloadtcpdump-7adcb5b605cc1328a3084c334f4697ec9771936c.tar.xz
tcpdump-7adcb5b605cc1328a3084c334f4697ec9771936c.zip
Adding upstream version 4.99.4.upstream/4.99.4
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'print-isoclns.c')
-rw-r--r--print-isoclns.c3561
1 files changed, 3561 insertions, 0 deletions
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+/*
+ * Copyright (c) 1992, 1993, 1994, 1995, 1996
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University nor the names of its contributors may be used to endorse
+ * or promote products derived from this software without specific prior
+ * written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Original code by Matt Thomas, Digital Equipment Corporation
+ *
+ * Extensively modified by Hannes Gredler (hannes@gredler.at) for more
+ * complete IS-IS & CLNP support.
+ */
+
+/* \summary: ISO CLNS, ESIS, and ISIS printer */
+
+/*
+ * specification:
+ *
+ * CLNP: ISO 8473 (respective ITU version is at https://www.itu.int/rec/T-REC-X.233/en/)
+ * ES-IS: ISO 9542
+ * IS-IS: ISO 10589
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#include <string.h>
+
+#include "netdissect.h"
+#include "addrtoname.h"
+#include "nlpid.h"
+#include "extract.h"
+#include "gmpls.h"
+#include "oui.h"
+#include "signature.h"
+
+
+/*
+ * IS-IS is defined in ISO 10589. Look there for protocol definitions.
+ */
+
+#define SYSTEM_ID_LEN MAC_ADDR_LEN
+#define NODE_ID_LEN (SYSTEM_ID_LEN+1)
+#define LSP_ID_LEN (SYSTEM_ID_LEN+2)
+
+#define ISIS_VERSION 1
+#define ESIS_VERSION 1
+#define CLNP_VERSION 1
+
+#define ISIS_PDU_TYPE_MASK 0x1F
+#define ESIS_PDU_TYPE_MASK 0x1F
+#define CLNP_PDU_TYPE_MASK 0x1F
+#define CLNP_FLAG_MASK 0xE0
+#define ISIS_LAN_PRIORITY_MASK 0x7F
+
+#define ISIS_PDU_L1_LAN_IIH 15
+#define ISIS_PDU_L2_LAN_IIH 16
+#define ISIS_PDU_PTP_IIH 17
+#define ISIS_PDU_L1_LSP 18
+#define ISIS_PDU_L2_LSP 20
+#define ISIS_PDU_L1_CSNP 24
+#define ISIS_PDU_L2_CSNP 25
+#define ISIS_PDU_L1_PSNP 26
+#define ISIS_PDU_L2_PSNP 27
+
+static const struct tok isis_pdu_values[] = {
+ { ISIS_PDU_L1_LAN_IIH, "L1 Lan IIH"},
+ { ISIS_PDU_L2_LAN_IIH, "L2 Lan IIH"},
+ { ISIS_PDU_PTP_IIH, "p2p IIH"},
+ { ISIS_PDU_L1_LSP, "L1 LSP"},
+ { ISIS_PDU_L2_LSP, "L2 LSP"},
+ { ISIS_PDU_L1_CSNP, "L1 CSNP"},
+ { ISIS_PDU_L2_CSNP, "L2 CSNP"},
+ { ISIS_PDU_L1_PSNP, "L1 PSNP"},
+ { ISIS_PDU_L2_PSNP, "L2 PSNP"},
+ { 0, NULL}
+};
+
+/*
+ * A TLV is a tuple of a type, length and a value and is normally used for
+ * encoding information in all sorts of places. This is an enumeration of
+ * the well known types.
+ *
+ * list taken from rfc3359 plus some memory from veterans ;-)
+ */
+
+#define ISIS_TLV_AREA_ADDR 1 /* iso10589 */
+#define ISIS_TLV_IS_REACH 2 /* iso10589 */
+#define ISIS_TLV_ESNEIGH 3 /* iso10589 */
+#define ISIS_TLV_PART_DIS 4 /* iso10589 */
+#define ISIS_TLV_PREFIX_NEIGH 5 /* iso10589 */
+#define ISIS_TLV_ISNEIGH 6 /* iso10589 */
+#define ISIS_TLV_INSTANCE_ID 7 /* rfc8202 */
+#define ISIS_TLV_PADDING 8 /* iso10589 */
+#define ISIS_TLV_LSP 9 /* iso10589 */
+#define ISIS_TLV_AUTH 10 /* iso10589, rfc3567 */
+#define ISIS_TLV_CHECKSUM 12 /* rfc3358 */
+#define ISIS_TLV_CHECKSUM_MINLEN 2
+#define ISIS_TLV_POI 13 /* rfc6232 */
+#define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */
+#define ISIS_TLV_EXT_IS_REACH 22 /* rfc5305 */
+#define ISIS_TLV_IS_ALIAS_ID 24 /* rfc5311 */
+#define ISIS_TLV_DECNET_PHASE4 42
+#define ISIS_TLV_LUCENT_PRIVATE 66
+#define ISIS_TLV_INT_IP_REACH 128 /* rfc1195, rfc2966 */
+#define ISIS_TLV_PROTOCOLS 129 /* rfc1195 */
+#define ISIS_TLV_EXT_IP_REACH 130 /* rfc1195, rfc2966 */
+#define ISIS_TLV_IDRP_INFO 131 /* rfc1195 */
+#define ISIS_TLV_IPADDR 132 /* rfc1195 */
+#define ISIS_TLV_IPAUTH 133 /* rfc1195 */
+#define ISIS_TLV_TE_ROUTER_ID 134 /* rfc5305 */
+#define ISIS_TLV_EXTD_IP_REACH 135 /* rfc5305 */
+#define ISIS_TLV_HOSTNAME 137 /* rfc2763 */
+#define ISIS_TLV_SHARED_RISK_GROUP 138 /* draft-ietf-isis-gmpls-extensions */
+#define ISIS_TLV_MT_PORT_CAP 143 /* rfc6165 */
+#define ISIS_TLV_MT_CAPABILITY 144 /* rfc6329 */
+#define ISIS_TLV_NORTEL_PRIVATE1 176
+#define ISIS_TLV_NORTEL_PRIVATE2 177
+#define ISIS_TLV_RESTART_SIGNALING 211 /* rfc3847 */
+#define ISIS_TLV_RESTART_SIGNALING_FLAGLEN 1
+#define ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN 2
+#define ISIS_TLV_MT_IS_REACH 222 /* draft-ietf-isis-wg-multi-topology-05 */
+#define ISIS_TLV_MT_SUPPORTED 229 /* draft-ietf-isis-wg-multi-topology-05 */
+#define ISIS_TLV_IP6ADDR 232 /* draft-ietf-isis-ipv6-02 */
+#define ISIS_TLV_MT_IP_REACH 235 /* draft-ietf-isis-wg-multi-topology-05 */
+#define ISIS_TLV_IP6_REACH 236 /* draft-ietf-isis-ipv6-02 */
+#define ISIS_TLV_MT_IP6_REACH 237 /* draft-ietf-isis-wg-multi-topology-05 */
+#define ISIS_TLV_PTP_ADJ 240 /* rfc3373 */
+#define ISIS_TLV_IIH_SEQNR 241 /* draft-shen-isis-iih-sequence-00 */
+#define ISIS_TLV_ROUTER_CAPABILITY 242 /* rfc7981 */
+#define ISIS_TLV_VENDOR_PRIVATE 250 /* draft-ietf-isis-experimental-tlv-01 */
+#define ISIS_TLV_VENDOR_PRIVATE_MINLEN 3
+
+static const struct tok isis_tlv_values[] = {
+ { ISIS_TLV_AREA_ADDR, "Area address(es)"},
+ { ISIS_TLV_IS_REACH, "IS Reachability"},
+ { ISIS_TLV_ESNEIGH, "ES Neighbor(s)"},
+ { ISIS_TLV_PART_DIS, "Partition DIS"},
+ { ISIS_TLV_PREFIX_NEIGH, "Prefix Neighbors"},
+ { ISIS_TLV_ISNEIGH, "IS Neighbor(s)"},
+ { ISIS_TLV_INSTANCE_ID, "Instance Identifier"},
+ { ISIS_TLV_PADDING, "Padding"},
+ { ISIS_TLV_LSP, "LSP entries"},
+ { ISIS_TLV_AUTH, "Authentication"},
+ { ISIS_TLV_CHECKSUM, "Checksum"},
+ { ISIS_TLV_POI, "Purge Originator Identifier"},
+ { ISIS_TLV_LSP_BUFFERSIZE, "LSP Buffersize"},
+ { ISIS_TLV_EXT_IS_REACH, "Extended IS Reachability"},
+ { ISIS_TLV_IS_ALIAS_ID, "IS Alias ID"},
+ { ISIS_TLV_DECNET_PHASE4, "DECnet Phase IV"},
+ { ISIS_TLV_LUCENT_PRIVATE, "Lucent Proprietary"},
+ { ISIS_TLV_INT_IP_REACH, "IPv4 Internal Reachability"},
+ { ISIS_TLV_PROTOCOLS, "Protocols supported"},
+ { ISIS_TLV_EXT_IP_REACH, "IPv4 External Reachability"},
+ { ISIS_TLV_IDRP_INFO, "Inter-Domain Information Type"},
+ { ISIS_TLV_IPADDR, "IPv4 Interface address(es)"},
+ { ISIS_TLV_IPAUTH, "IPv4 authentication (deprecated)"},
+ { ISIS_TLV_TE_ROUTER_ID, "Traffic Engineering Router ID"},
+ { ISIS_TLV_EXTD_IP_REACH, "Extended IPv4 Reachability"},
+ { ISIS_TLV_SHARED_RISK_GROUP, "Shared Risk Link Group"},
+ { ISIS_TLV_MT_PORT_CAP, "Multi-Topology-Aware Port Capability"},
+ { ISIS_TLV_MT_CAPABILITY, "Multi-Topology Capability"},
+ { ISIS_TLV_NORTEL_PRIVATE1, "Nortel Proprietary"},
+ { ISIS_TLV_NORTEL_PRIVATE2, "Nortel Proprietary"},
+ { ISIS_TLV_HOSTNAME, "Hostname"},
+ { ISIS_TLV_RESTART_SIGNALING, "Restart Signaling"},
+ { ISIS_TLV_MT_IS_REACH, "Multi Topology IS Reachability"},
+ { ISIS_TLV_MT_SUPPORTED, "Multi Topology"},
+ { ISIS_TLV_IP6ADDR, "IPv6 Interface address(es)"},
+ { ISIS_TLV_MT_IP_REACH, "Multi-Topology IPv4 Reachability"},
+ { ISIS_TLV_IP6_REACH, "IPv6 reachability"},
+ { ISIS_TLV_MT_IP6_REACH, "Multi-Topology IP6 Reachability"},
+ { ISIS_TLV_PTP_ADJ, "Point-to-point Adjacency State"},
+ { ISIS_TLV_IIH_SEQNR, "Hello PDU Sequence Number"},
+ { ISIS_TLV_ROUTER_CAPABILITY, "IS-IS Router Capability"},
+ { ISIS_TLV_VENDOR_PRIVATE, "Vendor Private"},
+ { 0, NULL }
+};
+
+#define ESIS_OPTION_PROTOCOLS 129
+#define ESIS_OPTION_QOS_MAINTENANCE 195 /* iso9542 */
+#define ESIS_OPTION_SECURITY 197 /* iso9542 */
+#define ESIS_OPTION_ES_CONF_TIME 198 /* iso9542 */
+#define ESIS_OPTION_PRIORITY 205 /* iso9542 */
+#define ESIS_OPTION_ADDRESS_MASK 225 /* iso9542 */
+#define ESIS_OPTION_SNPA_MASK 226 /* iso9542 */
+
+static const struct tok esis_option_values[] = {
+ { ESIS_OPTION_PROTOCOLS, "Protocols supported"},
+ { ESIS_OPTION_QOS_MAINTENANCE, "QoS Maintenance" },
+ { ESIS_OPTION_SECURITY, "Security" },
+ { ESIS_OPTION_ES_CONF_TIME, "ES Configuration Time" },
+ { ESIS_OPTION_PRIORITY, "Priority" },
+ { ESIS_OPTION_ADDRESS_MASK, "Addressk Mask" },
+ { ESIS_OPTION_SNPA_MASK, "SNPA Mask" },
+ { 0, NULL }
+};
+
+#define CLNP_OPTION_DISCARD_REASON 193
+#define CLNP_OPTION_QOS_MAINTENANCE 195 /* iso8473 */
+#define CLNP_OPTION_SECURITY 197 /* iso8473 */
+#define CLNP_OPTION_SOURCE_ROUTING 200 /* iso8473 */
+#define CLNP_OPTION_ROUTE_RECORDING 203 /* iso8473 */
+#define CLNP_OPTION_PADDING 204 /* iso8473 */
+#define CLNP_OPTION_PRIORITY 205 /* iso8473 */
+
+static const struct tok clnp_option_values[] = {
+ { CLNP_OPTION_DISCARD_REASON, "Discard Reason"},
+ { CLNP_OPTION_PRIORITY, "Priority"},
+ { CLNP_OPTION_QOS_MAINTENANCE, "QoS Maintenance"},
+ { CLNP_OPTION_SECURITY, "Security"},
+ { CLNP_OPTION_SOURCE_ROUTING, "Source Routing"},
+ { CLNP_OPTION_ROUTE_RECORDING, "Route Recording"},
+ { CLNP_OPTION_PADDING, "Padding"},
+ { 0, NULL }
+};
+
+static const struct tok clnp_option_rfd_class_values[] = {
+ { 0x0, "General"},
+ { 0x8, "Address"},
+ { 0x9, "Source Routeing"},
+ { 0xa, "Lifetime"},
+ { 0xb, "PDU Discarded"},
+ { 0xc, "Reassembly"},
+ { 0, NULL }
+};
+
+static const struct tok clnp_option_rfd_general_values[] = {
+ { 0x0, "Reason not specified"},
+ { 0x1, "Protocol procedure error"},
+ { 0x2, "Incorrect checksum"},
+ { 0x3, "PDU discarded due to congestion"},
+ { 0x4, "Header syntax error (cannot be parsed)"},
+ { 0x5, "Segmentation needed but not permitted"},
+ { 0x6, "Incomplete PDU received"},
+ { 0x7, "Duplicate option"},
+ { 0, NULL }
+};
+
+static const struct tok clnp_option_rfd_address_values[] = {
+ { 0x0, "Destination address unreachable"},
+ { 0x1, "Destination address unknown"},
+ { 0, NULL }
+};
+
+static const struct tok clnp_option_rfd_source_routeing_values[] = {
+ { 0x0, "Unspecified source routeing error"},
+ { 0x1, "Syntax error in source routeing field"},
+ { 0x2, "Unknown address in source routeing field"},
+ { 0x3, "Path not acceptable"},
+ { 0, NULL }
+};
+
+static const struct tok clnp_option_rfd_lifetime_values[] = {
+ { 0x0, "Lifetime expired while data unit in transit"},
+ { 0x1, "Lifetime expired during reassembly"},
+ { 0, NULL }
+};
+
+static const struct tok clnp_option_rfd_pdu_discard_values[] = {
+ { 0x0, "Unsupported option not specified"},
+ { 0x1, "Unsupported protocol version"},
+ { 0x2, "Unsupported security option"},
+ { 0x3, "Unsupported source routeing option"},
+ { 0x4, "Unsupported recording of route option"},
+ { 0, NULL }
+};
+
+static const struct tok clnp_option_rfd_reassembly_values[] = {
+ { 0x0, "Reassembly interference"},
+ { 0, NULL }
+};
+
+/* array of 16 error-classes */
+static const struct tok *clnp_option_rfd_error_class[] = {
+ clnp_option_rfd_general_values,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ clnp_option_rfd_address_values,
+ clnp_option_rfd_source_routeing_values,
+ clnp_option_rfd_lifetime_values,
+ clnp_option_rfd_pdu_discard_values,
+ clnp_option_rfd_reassembly_values,
+ NULL,
+ NULL,
+ NULL
+};
+
+#define CLNP_OPTION_OPTION_QOS_MASK 0x3f
+#define CLNP_OPTION_SCOPE_MASK 0xc0
+#define CLNP_OPTION_SCOPE_SA_SPEC 0x40
+#define CLNP_OPTION_SCOPE_DA_SPEC 0x80
+#define CLNP_OPTION_SCOPE_GLOBAL 0xc0
+
+static const struct tok clnp_option_scope_values[] = {
+ { CLNP_OPTION_SCOPE_SA_SPEC, "Source Address Specific"},
+ { CLNP_OPTION_SCOPE_DA_SPEC, "Destination Address Specific"},
+ { CLNP_OPTION_SCOPE_GLOBAL, "Globally unique"},
+ { 0, NULL }
+};
+
+static const struct tok clnp_option_sr_rr_values[] = {
+ { 0x0, "partial"},
+ { 0x1, "complete"},
+ { 0, NULL }
+};
+
+static const struct tok clnp_option_sr_rr_string_values[] = {
+ { CLNP_OPTION_SOURCE_ROUTING, "source routing"},
+ { CLNP_OPTION_ROUTE_RECORDING, "recording of route in progress"},
+ { 0, NULL }
+};
+
+static const struct tok clnp_option_qos_global_values[] = {
+ { 0x20, "reserved"},
+ { 0x10, "sequencing vs. delay"},
+ { 0x08, "congested"},
+ { 0x04, "delay vs. cost"},
+ { 0x02, "error vs. delay"},
+ { 0x01, "error vs. cost"},
+ { 0, NULL }
+};
+
+static const struct tok isis_tlv_router_capability_flags[] = {
+ { 0x01, "S bit"},
+ { 0x02, "D bit"},
+ { 0, NULL }
+};
+
+#define ISIS_SUBTLV_ROUTER_CAP_SR 2 /* rfc 8667 */
+
+static const struct tok isis_router_capability_subtlv_values[] = {
+ { ISIS_SUBTLV_ROUTER_CAP_SR, "SR-Capabilities"},
+ { 0, NULL }
+};
+
+static const struct tok isis_router_capability_sr_flags[] = {
+ { 0x80, "ipv4"},
+ { 0x40, "ipv6"},
+ { 0, NULL }
+};
+
+#define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* rfc5305 */
+#define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* rfc4205 */
+#define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* rfc5305 */
+#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* rfc5305 */
+#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* rfc5305 */
+#define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* rfc5305 */
+#define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* rfc5305 */
+#define ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 /* rfc4124 */
+#define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD 12 /* draft-ietf-tewg-diff-te-proto-06 */
+#define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* rfc5305 */
+#define ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE 19 /* draft-ietf-isis-link-attr-01 */
+#define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* rfc4205 */
+#define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* rfc4205 */
+#define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS 22 /* rfc4124 */
+#define ISIS_SUBTLV_EXT_IS_REACH_LAN_ADJ_SEGMENT_ID 32 /* rfc8667 */
+
+#define ISIS_SUBTLV_SPB_METRIC 29 /* rfc6329 */
+
+static const struct tok isis_ext_is_reach_subtlv_values[] = {
+ { ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP, "Administrative groups" },
+ { ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" },
+ { ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID, "Link Remote Identifier" },
+ { ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR, "IPv4 interface address" },
+ { ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR, "IPv4 neighbor address" },
+ { ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW, "Maximum link bandwidth" },
+ { ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW, "Reservable link bandwidth" },
+ { ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW, "Unreserved bandwidth" },
+ { ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC, "Traffic Engineering Metric" },
+ { ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE, "Link Attribute" },
+ { ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE, "Link Protection Type" },
+ { ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR, "Interface Switching Capability" },
+ { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD, "Bandwidth Constraints (old)" },
+ { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS, "Bandwidth Constraints" },
+ { ISIS_SUBTLV_EXT_IS_REACH_LAN_ADJ_SEGMENT_ID, "LAN Adjacency Segment Identifier" },
+ { ISIS_SUBTLV_SPB_METRIC, "SPB Metric" },
+ { 250, "Reserved for cisco specific extensions" },
+ { 251, "Reserved for cisco specific extensions" },
+ { 252, "Reserved for cisco specific extensions" },
+ { 253, "Reserved for cisco specific extensions" },
+ { 254, "Reserved for cisco specific extensions" },
+ { 255, "Reserved for future expansion" },
+ { 0, NULL }
+};
+
+#define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32 1 /* draft-ietf-isis-admin-tags-01 */
+#define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64 2 /* draft-ietf-isis-admin-tags-01 */
+#define ISIS_SUBTLV_EXTD_IP_REACH_PREFIX_SID 3 /* rfc8667 */
+#define ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR 117 /* draft-ietf-isis-wg-multi-topology-05 */
+
+static const struct tok isis_ext_ip_reach_subtlv_values[] = {
+ { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32, "32-Bit Administrative tag" },
+ { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64, "64-Bit Administrative tag" },
+ { ISIS_SUBTLV_EXTD_IP_REACH_PREFIX_SID, "Prefix SID" },
+ { ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR, "Management Prefix Color" },
+ { 0, NULL }
+};
+
+#define ISIS_PREFIX_SID_FLAG_R 0x80 /* rfc 8667 */
+#define ISIS_PREFIX_SID_FLAG_N 0x40 /* rfc 8667 */
+#define ISIS_PREFIX_SID_FLAG_P 0x20 /* rfc 8667 */
+#define ISIS_PREFIX_SID_FLAG_E 0x10 /* rfc 8667 */
+#define ISIS_PREFIX_SID_FLAG_V 0x08 /* rfc 8667 */
+#define ISIS_PREFIX_SID_FLAG_L 0x04 /* rfc 8667 */
+
+static const struct tok prefix_sid_flag_values[] = {
+ { ISIS_PREFIX_SID_FLAG_R, "Readvertisement"},
+ { ISIS_PREFIX_SID_FLAG_N, "Node"},
+ { ISIS_PREFIX_SID_FLAG_P, "No-PHP"},
+ { ISIS_PREFIX_SID_FLAG_E, "Explicit NULL"},
+ { ISIS_PREFIX_SID_FLAG_V, "Value"},
+ { ISIS_PREFIX_SID_FLAG_L, "Local"},
+ { 0, NULL}
+};
+
+
+/* rfc 8667 */
+static const struct tok prefix_sid_algo_values[] = {
+ { 0, "SPF"},
+ { 1, "strict-SPF"},
+ { 0, NULL}
+};
+
+static const struct tok isis_subtlv_link_attribute_values[] = {
+ { 0x01, "Local Protection Available" },
+ { 0x02, "Link excluded from local protection path" },
+ { 0x04, "Local maintenance required"},
+ { 0, NULL }
+};
+
+static const struct tok isis_lan_adj_sid_flag_values[] = {
+ { 0x80, "Address family IPv6" },
+ { 0x40, "Backup" },
+ { 0x20, "Value" },
+ { 0x10, "Local significance" },
+ { 0x08, "Set of adjacencies" },
+ { 0x04, "Persistent" },
+ { 0, NULL }
+};
+
+#define ISIS_SUBTLV_AUTH_SIMPLE 1
+#define ISIS_SUBTLV_AUTH_GENERIC 3 /* rfc 5310 */
+#define ISIS_SUBTLV_AUTH_MD5 54
+#define ISIS_SUBTLV_AUTH_MD5_LEN 16
+#define ISIS_SUBTLV_AUTH_PRIVATE 255
+
+static const struct tok isis_subtlv_auth_values[] = {
+ { ISIS_SUBTLV_AUTH_SIMPLE, "simple text password"},
+ { ISIS_SUBTLV_AUTH_GENERIC, "Generic Crypto key-id"},
+ { ISIS_SUBTLV_AUTH_MD5, "HMAC-MD5 password"},
+ { ISIS_SUBTLV_AUTH_PRIVATE, "Routing Domain private password"},
+ { 0, NULL }
+};
+
+#define ISIS_SUBTLV_IDRP_RES 0
+#define ISIS_SUBTLV_IDRP_LOCAL 1
+#define ISIS_SUBTLV_IDRP_ASN 2
+
+static const struct tok isis_subtlv_idrp_values[] = {
+ { ISIS_SUBTLV_IDRP_RES, "Reserved"},
+ { ISIS_SUBTLV_IDRP_LOCAL, "Routing-Domain Specific"},
+ { ISIS_SUBTLV_IDRP_ASN, "AS Number Tag"},
+ { 0, NULL}
+};
+
+#define ISIS_SUBTLV_SPB_MCID 4
+#define ISIS_SUBTLV_SPB_DIGEST 5
+#define ISIS_SUBTLV_SPB_BVID 6
+
+#define ISIS_SUBTLV_SPB_INSTANCE 1
+#define ISIS_SUBTLV_SPBM_SI 3
+
+#define ISIS_SPB_MCID_LEN 51
+#define ISIS_SUBTLV_SPB_MCID_MIN_LEN 102
+#define ISIS_SUBTLV_SPB_DIGEST_MIN_LEN 33
+#define ISIS_SUBTLV_SPB_BVID_MIN_LEN 6
+#define ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN 19
+#define ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN 8
+
+static const struct tok isis_mt_port_cap_subtlv_values[] = {
+ { ISIS_SUBTLV_SPB_MCID, "SPB MCID" },
+ { ISIS_SUBTLV_SPB_DIGEST, "SPB Digest" },
+ { ISIS_SUBTLV_SPB_BVID, "SPB BVID" },
+ { 0, NULL }
+};
+
+static const struct tok isis_mt_capability_subtlv_values[] = {
+ { ISIS_SUBTLV_SPB_INSTANCE, "SPB Instance" },
+ { ISIS_SUBTLV_SPBM_SI, "SPBM Service Identifier and Unicast Address" },
+ { 0, NULL }
+};
+
+struct isis_spb_mcid {
+ nd_uint8_t format_id;
+ nd_byte name[32];
+ nd_uint16_t revision_lvl;
+ nd_byte digest[16];
+};
+
+struct isis_subtlv_spb_mcid {
+ struct isis_spb_mcid mcid;
+ struct isis_spb_mcid aux_mcid;
+};
+
+struct isis_subtlv_spb_instance {
+ nd_byte cist_root_id[8];
+ nd_uint32_t cist_external_root_path_cost;
+ nd_uint16_t bridge_priority;
+ nd_uint32_t spsourceid;
+ nd_uint8_t no_of_trees;
+};
+
+#define CLNP_SEGMENT_PART 0x80
+#define CLNP_MORE_SEGMENTS 0x40
+#define CLNP_REQUEST_ER 0x20
+
+static const struct tok clnp_flag_values[] = {
+ { CLNP_SEGMENT_PART, "Segmentation permitted"},
+ { CLNP_MORE_SEGMENTS, "more Segments"},
+ { CLNP_REQUEST_ER, "request Error Report"},
+ { 0, NULL}
+};
+
+#define ISIS_MASK_LSP_OL_BIT(x) (GET_U_1(x)&0x4)
+#define ISIS_MASK_LSP_ISTYPE_BITS(x) (GET_U_1(x)&0x3)
+#define ISIS_MASK_LSP_PARTITION_BIT(x) (GET_U_1(x)&0x80)
+#define ISIS_MASK_LSP_ATT_BITS(x) (GET_U_1(x)&0x78)
+#define ISIS_MASK_LSP_ATT_ERROR_BIT(x) (GET_U_1(x)&0x40)
+#define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) (GET_U_1(x)&0x20)
+#define ISIS_MASK_LSP_ATT_DELAY_BIT(x) (GET_U_1(x)&0x10)
+#define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) (GET_U_1(x)&0x8)
+
+#define ISIS_MASK_MTID(x) ((x)&0x0fff)
+#define ISIS_MASK_MTFLAGS(x) ((x)&0xf000)
+
+static const struct tok isis_mt_flag_values[] = {
+ { 0x4000, "ATT bit set"},
+ { 0x8000, "Overload bit set"},
+ { 0, NULL}
+};
+
+#define ISIS_MASK_TLV_EXTD_IP_UPDOWN(x) ((x)&0x80)
+#define ISIS_MASK_TLV_EXTD_IP_SUBTLV(x) ((x)&0x40)
+
+#define ISIS_MASK_TLV_EXTD_IP6_IE(x) ((x)&0x40)
+#define ISIS_MASK_TLV_EXTD_IP6_SUBTLV(x) ((x)&0x20)
+
+#define ISIS_LSP_TLV_METRIC_SUPPORTED(x) (GET_U_1(x)&0x80)
+#define ISIS_LSP_TLV_METRIC_IE(x) (GET_U_1(x)&0x40)
+#define ISIS_LSP_TLV_METRIC_UPDOWN(x) (GET_U_1(x)&0x80)
+#define ISIS_LSP_TLV_METRIC_VALUE(x) (GET_U_1(x)&0x3f)
+
+#define ISIS_MASK_TLV_SHARED_RISK_GROUP(x) ((x)&0x1)
+
+static const struct tok isis_mt_values[] = {
+ { 0, "IPv4 unicast"},
+ { 1, "In-Band Management"},
+ { 2, "IPv6 unicast"},
+ { 3, "Multicast"},
+ { 4095, "Development, Experimental or Proprietary"},
+ { 0, NULL }
+};
+
+static const struct tok isis_iih_circuit_type_values[] = {
+ { 1, "Level 1 only"},
+ { 2, "Level 2 only"},
+ { 3, "Level 1, Level 2"},
+ { 0, NULL}
+};
+
+#define ISIS_LSP_TYPE_UNUSED0 0
+#define ISIS_LSP_TYPE_LEVEL_1 1
+#define ISIS_LSP_TYPE_UNUSED2 2
+#define ISIS_LSP_TYPE_LEVEL_2 3
+
+static const struct tok isis_lsp_istype_values[] = {
+ { ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"},
+ { ISIS_LSP_TYPE_LEVEL_1, "L1 IS"},
+ { ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"},
+ { ISIS_LSP_TYPE_LEVEL_2, "L2 IS"},
+ { 0, NULL }
+};
+
+/*
+ * Katz's point to point adjacency TLV uses codes to tell us the state of
+ * the remote adjacency. Enumerate them.
+ */
+
+#define ISIS_PTP_ADJ_UP 0
+#define ISIS_PTP_ADJ_INIT 1
+#define ISIS_PTP_ADJ_DOWN 2
+
+static const struct tok isis_ptp_adjancey_values[] = {
+ { ISIS_PTP_ADJ_UP, "Up" },
+ { ISIS_PTP_ADJ_INIT, "Initializing" },
+ { ISIS_PTP_ADJ_DOWN, "Down" },
+ { 0, NULL}
+};
+
+struct isis_tlv_ptp_adj {
+ nd_uint8_t adjacency_state;
+ nd_uint32_t extd_local_circuit_id;
+ nd_byte neighbor_sysid[SYSTEM_ID_LEN];
+ nd_uint32_t neighbor_extd_local_circuit_id;
+};
+
+static void osi_print_cksum(netdissect_options *, const uint8_t *pptr,
+ uint16_t checksum, int checksum_offset, u_int length);
+static int clnp_print(netdissect_options *, const uint8_t *, u_int);
+static void esis_print(netdissect_options *, const uint8_t *, u_int);
+static int isis_print(netdissect_options *, const uint8_t *, u_int);
+
+struct isis_metric_block {
+ nd_uint8_t metric_default;
+ nd_uint8_t metric_delay;
+ nd_uint8_t metric_expense;
+ nd_uint8_t metric_error;
+};
+
+struct isis_tlv_is_reach {
+ struct isis_metric_block isis_metric_block;
+ nd_byte neighbor_nodeid[NODE_ID_LEN];
+};
+
+struct isis_tlv_es_reach {
+ struct isis_metric_block isis_metric_block;
+ nd_byte neighbor_sysid[SYSTEM_ID_LEN];
+};
+
+struct isis_tlv_ip_reach {
+ struct isis_metric_block isis_metric_block;
+ nd_ipv4 prefix;
+ nd_ipv4 mask;
+};
+
+static const struct tok isis_is_reach_virtual_values[] = {
+ { 0, "IsNotVirtual"},
+ { 1, "IsVirtual"},
+ { 0, NULL }
+};
+
+static const struct tok isis_restart_flag_values[] = {
+ { 0x1, "Restart Request"},
+ { 0x2, "Restart Acknowledgement"},
+ { 0x4, "Suppress adjacency advertisement"},
+ { 0, NULL }
+};
+
+struct isis_common_header {
+ nd_uint8_t nlpid;
+ nd_uint8_t fixed_len;
+ nd_uint8_t version; /* Protocol version */
+ nd_uint8_t id_length;
+ nd_uint8_t pdu_type; /* 3 MSbits are reserved */
+ nd_uint8_t pdu_version; /* Packet format version */
+ nd_byte reserved;
+ nd_uint8_t max_area;
+};
+
+struct isis_iih_lan_header {
+ nd_uint8_t circuit_type;
+ nd_byte source_id[SYSTEM_ID_LEN];
+ nd_uint16_t holding_time;
+ nd_uint16_t pdu_len;
+ nd_uint8_t priority;
+ nd_byte lan_id[NODE_ID_LEN];
+};
+
+struct isis_iih_ptp_header {
+ nd_uint8_t circuit_type;
+ nd_byte source_id[SYSTEM_ID_LEN];
+ nd_uint16_t holding_time;
+ nd_uint16_t pdu_len;
+ nd_uint8_t circuit_id;
+};
+
+struct isis_lsp_header {
+ nd_uint16_t pdu_len;
+ nd_uint16_t remaining_lifetime;
+ nd_byte lsp_id[LSP_ID_LEN];
+ nd_uint32_t sequence_number;
+ nd_uint16_t checksum;
+ nd_uint8_t typeblock;
+};
+
+struct isis_csnp_header {
+ nd_uint16_t pdu_len;
+ nd_byte source_id[NODE_ID_LEN];
+ nd_byte start_lsp_id[LSP_ID_LEN];
+ nd_byte end_lsp_id[LSP_ID_LEN];
+};
+
+struct isis_psnp_header {
+ nd_uint16_t pdu_len;
+ nd_byte source_id[NODE_ID_LEN];
+};
+
+struct isis_tlv_lsp {
+ nd_uint16_t remaining_lifetime;
+ nd_byte lsp_id[LSP_ID_LEN];
+ nd_uint32_t sequence_number;
+ nd_uint16_t checksum;
+};
+
+#define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header))
+#define ISIS_IIH_LAN_HEADER_SIZE (sizeof(struct isis_iih_lan_header))
+#define ISIS_IIH_PTP_HEADER_SIZE (sizeof(struct isis_iih_ptp_header))
+#define ISIS_LSP_HEADER_SIZE (sizeof(struct isis_lsp_header))
+#define ISIS_CSNP_HEADER_SIZE (sizeof(struct isis_csnp_header))
+#define ISIS_PSNP_HEADER_SIZE (sizeof(struct isis_psnp_header))
+
+void
+isoclns_print(netdissect_options *ndo, const u_char *p, u_int length)
+{
+ ndo->ndo_protocol = "isoclns";
+
+ if (ndo->ndo_eflag)
+ ND_PRINT("OSI NLPID %s (0x%02x): ",
+ tok2str(nlpid_values, "Unknown", GET_U_1(p)),
+ GET_U_1(p));
+
+ switch (GET_U_1(p)) {
+
+ case NLPID_CLNP:
+ if (!clnp_print(ndo, p, length))
+ print_unknown_data(ndo, p, "\n\t", length);
+ break;
+
+ case NLPID_ESIS:
+ esis_print(ndo, p, length);
+ return;
+
+ case NLPID_ISIS:
+ if (!isis_print(ndo, p, length))
+ print_unknown_data(ndo, p, "\n\t", length);
+ break;
+
+ case NLPID_NULLNS:
+ ND_PRINT("%slength: %u", ndo->ndo_eflag ? "" : ", ", length);
+ break;
+
+ case NLPID_Q933:
+ q933_print(ndo, p + 1, length - 1);
+ break;
+
+ case NLPID_IP:
+ ip_print(ndo, p + 1, length - 1);
+ break;
+
+ case NLPID_IP6:
+ ip6_print(ndo, p + 1, length - 1);
+ break;
+
+ case NLPID_PPP:
+ ppp_print(ndo, p + 1, length - 1);
+ break;
+
+ default:
+ if (!ndo->ndo_eflag)
+ ND_PRINT("OSI NLPID 0x%02x unknown", GET_U_1(p));
+ ND_PRINT("%slength: %u", ndo->ndo_eflag ? "" : ", ", length);
+ if (length > 1)
+ print_unknown_data(ndo, p, "\n\t", length);
+ break;
+ }
+}
+
+#define CLNP_PDU_ER 1
+#define CLNP_PDU_DT 28
+#define CLNP_PDU_MD 29
+#define CLNP_PDU_ERQ 30
+#define CLNP_PDU_ERP 31
+
+static const struct tok clnp_pdu_values[] = {
+ { CLNP_PDU_ER, "Error Report"},
+ { CLNP_PDU_MD, "MD"},
+ { CLNP_PDU_DT, "Data"},
+ { CLNP_PDU_ERQ, "Echo Request"},
+ { CLNP_PDU_ERP, "Echo Response"},
+ { 0, NULL }
+};
+
+struct clnp_header_t {
+ nd_uint8_t nlpid;
+ nd_uint8_t length_indicator;
+ nd_uint8_t version;
+ nd_uint8_t lifetime; /* units of 500ms */
+ nd_uint8_t type;
+ nd_uint16_t segment_length;
+ nd_uint16_t cksum;
+};
+
+struct clnp_segment_header_t {
+ nd_uint16_t data_unit_id;
+ nd_uint16_t segment_offset;
+ nd_uint16_t total_length;
+};
+
+/*
+ * clnp_print
+ * Decode CLNP packets. Return 0 on error.
+ */
+
+static int
+clnp_print(netdissect_options *ndo,
+ const uint8_t *pptr, u_int length)
+{
+ const uint8_t *optr,*source_address,*dest_address;
+ u_int li,li_remaining,tlen,nsap_offset,source_address_length,dest_address_length, clnp_pdu_type, clnp_flags;
+ const struct clnp_header_t *clnp_header;
+ const struct clnp_segment_header_t *clnp_segment_header;
+ uint8_t rfd_error,rfd_error_major,rfd_error_minor;
+
+ ndo->ndo_protocol = "clnp";
+ clnp_header = (const struct clnp_header_t *) pptr;
+ ND_TCHECK_SIZE(clnp_header);
+
+ li = GET_U_1(clnp_header->length_indicator);
+ li_remaining = li;
+ optr = pptr;
+
+ if (!ndo->ndo_eflag)
+ nd_print_protocol_caps(ndo);
+
+ /*
+ * Sanity checking of the header.
+ */
+
+ if (GET_U_1(clnp_header->version) != CLNP_VERSION) {
+ ND_PRINT("version %u packet not supported",
+ GET_U_1(clnp_header->version));
+ return (0);
+ }
+
+ if (li > length) {
+ ND_PRINT(" length indicator(%u) > PDU size (%u)!", li, length);
+ return (0);
+ }
+
+ if (li < sizeof(struct clnp_header_t)) {
+ ND_PRINT(" length indicator %u < min PDU size:", li);
+ while (pptr < ndo->ndo_snapend) {
+ ND_PRINT("%02X", GET_U_1(pptr));
+ pptr++;
+ }
+ return (0);
+ }
+
+ /* FIXME further header sanity checking */
+
+ clnp_pdu_type = GET_U_1(clnp_header->type) & CLNP_PDU_TYPE_MASK;
+ clnp_flags = GET_U_1(clnp_header->type) & CLNP_FLAG_MASK;
+
+ pptr += sizeof(struct clnp_header_t);
+ li_remaining -= sizeof(struct clnp_header_t);
+
+ if (li_remaining < 1) {
+ ND_PRINT("li < size of fixed part of CLNP header and addresses");
+ return (0);
+ }
+ dest_address_length = GET_U_1(pptr);
+ pptr += 1;
+ li_remaining -= 1;
+ if (li_remaining < dest_address_length) {
+ ND_PRINT("li < size of fixed part of CLNP header and addresses");
+ return (0);
+ }
+ ND_TCHECK_LEN(pptr, dest_address_length);
+ dest_address = pptr;
+ pptr += dest_address_length;
+ li_remaining -= dest_address_length;
+
+ if (li_remaining < 1) {
+ ND_PRINT("li < size of fixed part of CLNP header and addresses");
+ return (0);
+ }
+ source_address_length = GET_U_1(pptr);
+ pptr += 1;
+ li_remaining -= 1;
+ if (li_remaining < source_address_length) {
+ ND_PRINT("li < size of fixed part of CLNP header and addresses");
+ return (0);
+ }
+ ND_TCHECK_LEN(pptr, source_address_length);
+ source_address = pptr;
+ pptr += source_address_length;
+ li_remaining -= source_address_length;
+
+ if (ndo->ndo_vflag < 1) {
+ ND_PRINT("%s%s > %s, %s, length %u",
+ ndo->ndo_eflag ? "" : ", ",
+ GET_ISONSAP_STRING(source_address, source_address_length),
+ GET_ISONSAP_STRING(dest_address, dest_address_length),
+ tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type),
+ length);
+ return (1);
+ }
+ ND_PRINT("%slength %u", ndo->ndo_eflag ? "" : ", ", length);
+
+ ND_PRINT("\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, Segment PDU length: %u, checksum: 0x%04x",
+ tok2str(clnp_pdu_values, "unknown (%u)",clnp_pdu_type),
+ GET_U_1(clnp_header->length_indicator),
+ GET_U_1(clnp_header->version),
+ GET_U_1(clnp_header->lifetime)/2,
+ (GET_U_1(clnp_header->lifetime)%2)*5,
+ GET_BE_U_2(clnp_header->segment_length),
+ GET_BE_U_2(clnp_header->cksum));
+
+ osi_print_cksum(ndo, optr, GET_BE_U_2(clnp_header->cksum), 7,
+ GET_U_1(clnp_header->length_indicator));
+
+ ND_PRINT("\n\tFlags [%s]",
+ bittok2str(clnp_flag_values, "none", clnp_flags));
+
+ ND_PRINT("\n\tsource address (length %u): %s\n\tdest address (length %u): %s",
+ source_address_length,
+ GET_ISONSAP_STRING(source_address, source_address_length),
+ dest_address_length,
+ GET_ISONSAP_STRING(dest_address, dest_address_length));
+
+ if (clnp_flags & CLNP_SEGMENT_PART) {
+ if (li_remaining < sizeof(struct clnp_segment_header_t)) {
+ ND_PRINT("li < size of fixed part of CLNP header, addresses, and segment part");
+ return (0);
+ }
+ clnp_segment_header = (const struct clnp_segment_header_t *) pptr;
+ ND_TCHECK_SIZE(clnp_segment_header);
+ ND_PRINT("\n\tData Unit ID: 0x%04x, Segment Offset: %u, Total PDU Length: %u",
+ GET_BE_U_2(clnp_segment_header->data_unit_id),
+ GET_BE_U_2(clnp_segment_header->segment_offset),
+ GET_BE_U_2(clnp_segment_header->total_length));
+ pptr+=sizeof(struct clnp_segment_header_t);
+ li_remaining-=sizeof(struct clnp_segment_header_t);
+ }
+
+ /* now walk the options */
+ while (li_remaining != 0) {
+ u_int op, opli;
+ const uint8_t *tptr;
+
+ if (li_remaining < 2) {
+ ND_PRINT(", bad opts/li");
+ return (0);
+ }
+ op = GET_U_1(pptr);
+ opli = GET_U_1(pptr + 1);
+ pptr += 2;
+ li_remaining -= 2;
+ if (opli > li_remaining) {
+ ND_PRINT(", opt (%u) too long", op);
+ return (0);
+ }
+ ND_TCHECK_LEN(pptr, opli);
+ li_remaining -= opli;
+ tptr = pptr;
+ tlen = opli;
+
+ ND_PRINT("\n\t %s Option #%u, length %u, value: ",
+ tok2str(clnp_option_values,"Unknown",op),
+ op,
+ opli);
+
+ /*
+ * We've already checked that the entire option is present
+ * in the captured packet with the ND_TCHECK_LEN() call.
+ * Therefore, we don't need to do ND_TCHECK()/ND_TCHECK_LEN()
+ * checks.
+ * We do, however, need to check tlen, to make sure we
+ * don't run past the end of the option.
+ */
+ switch (op) {
+
+
+ case CLNP_OPTION_ROUTE_RECORDING: /* those two options share the format */
+ case CLNP_OPTION_SOURCE_ROUTING:
+ if (tlen < 2) {
+ ND_PRINT(", bad opt len");
+ return (0);
+ }
+ ND_PRINT("%s %s",
+ tok2str(clnp_option_sr_rr_values,"Unknown",GET_U_1(tptr)),
+ tok2str(clnp_option_sr_rr_string_values, "Unknown Option %u", op));
+ nsap_offset=GET_U_1(tptr + 1);
+ if (nsap_offset == 0) {
+ ND_PRINT(" Bad NSAP offset (0)");
+ break;
+ }
+ nsap_offset-=1; /* offset to nsap list */
+ if (nsap_offset > tlen) {
+ ND_PRINT(" Bad NSAP offset (past end of option)");
+ break;
+ }
+ tptr+=nsap_offset;
+ tlen-=nsap_offset;
+ while (tlen > 0) {
+ source_address_length=GET_U_1(tptr);
+ if (tlen < source_address_length+1) {
+ ND_PRINT("\n\t NSAP address goes past end of option");
+ break;
+ }
+ if (source_address_length > 0) {
+ source_address=(tptr+1);
+ ND_PRINT("\n\t NSAP address (length %u): %s",
+ source_address_length,
+ GET_ISONSAP_STRING(source_address, source_address_length));
+ }
+ tlen-=source_address_length+1;
+ }
+ break;
+
+ case CLNP_OPTION_PRIORITY:
+ if (tlen < 1) {
+ ND_PRINT(", bad opt len");
+ return (0);
+ }
+ ND_PRINT("0x%1x", GET_U_1(tptr)&0x0f);
+ break;
+
+ case CLNP_OPTION_QOS_MAINTENANCE:
+ if (tlen < 1) {
+ ND_PRINT(", bad opt len");
+ return (0);
+ }
+ ND_PRINT("\n\t Format Code: %s",
+ tok2str(clnp_option_scope_values, "Reserved", GET_U_1(tptr) & CLNP_OPTION_SCOPE_MASK));
+
+ if ((GET_U_1(tptr)&CLNP_OPTION_SCOPE_MASK) == CLNP_OPTION_SCOPE_GLOBAL)
+ ND_PRINT("\n\t QoS Flags [%s]",
+ bittok2str(clnp_option_qos_global_values,
+ "none",
+ GET_U_1(tptr)&CLNP_OPTION_OPTION_QOS_MASK));
+ break;
+
+ case CLNP_OPTION_SECURITY:
+ if (tlen < 2) {
+ ND_PRINT(", bad opt len");
+ return (0);
+ }
+ ND_PRINT("\n\t Format Code: %s, Security-Level %u",
+ tok2str(clnp_option_scope_values,"Reserved",GET_U_1(tptr)&CLNP_OPTION_SCOPE_MASK),
+ GET_U_1(tptr + 1));
+ break;
+
+ case CLNP_OPTION_DISCARD_REASON:
+ if (tlen < 1) {
+ ND_PRINT(", bad opt len");
+ return (0);
+ }
+ rfd_error = GET_U_1(tptr);
+ rfd_error_major = (rfd_error&0xf0) >> 4;
+ rfd_error_minor = rfd_error&0x0f;
+ ND_PRINT("\n\t Class: %s Error (0x%01x), %s (0x%01x)",
+ tok2str(clnp_option_rfd_class_values,"Unknown",rfd_error_major),
+ rfd_error_major,
+ tok2str(clnp_option_rfd_error_class[rfd_error_major],"Unknown",rfd_error_minor),
+ rfd_error_minor);
+ break;
+
+ case CLNP_OPTION_PADDING:
+ ND_PRINT("padding data");
+ break;
+
+ /*
+ * FIXME those are the defined Options that lack a decoder
+ * you are welcome to contribute code ;-)
+ */
+
+ default:
+ print_unknown_data(ndo, tptr, "\n\t ", opli);
+ break;
+ }
+ if (ndo->ndo_vflag > 1)
+ print_unknown_data(ndo, pptr, "\n\t ", opli);
+ pptr += opli;
+ }
+
+ switch (clnp_pdu_type) {
+
+ case CLNP_PDU_ER: /* fall through */
+ case CLNP_PDU_ERP:
+ if (GET_U_1(pptr) == NLPID_CLNP) {
+ ND_PRINT("\n\t-----original packet-----\n\t");
+ /* FIXME recursion protection */
+ clnp_print(ndo, pptr, length - li);
+ break;
+ }
+
+ /* The cases above break from the switch block if they see and print
+ * a CLNP header in the Data part. For an Error Report PDU this is
+ * described in Section 7.9.6 of ITU X.233 (1997 E), also known as
+ * ISO/IEC 8473-1:1998(E). It is not clear why in this code the same
+ * applies to an Echo Response PDU, as the standard does not specify
+ * the contents -- could be a proprietary extension or a bug. In either
+ * case, if the Data part does not contain a CLNP header, its structure
+ * is considered unknown and the decoding falls through to print the
+ * contents as-is.
+ */
+ ND_FALL_THROUGH;
+
+ case CLNP_PDU_DT:
+ case CLNP_PDU_MD:
+ case CLNP_PDU_ERQ:
+
+ default:
+ /* dump the PDU specific data */
+ if (length > ND_BYTES_BETWEEN(pptr, optr)) {
+ ND_PRINT("\n\t undecoded non-header data, length %u", length-li);
+ print_unknown_data(ndo, pptr, "\n\t ", length - ND_BYTES_BETWEEN(pptr, optr));
+ }
+ }
+
+ return (1);
+
+ trunc:
+ nd_print_trunc(ndo);
+ return (1);
+
+}
+
+
+#define ESIS_PDU_REDIRECT 6
+#define ESIS_PDU_ESH 2
+#define ESIS_PDU_ISH 4
+
+static const struct tok esis_pdu_values[] = {
+ { ESIS_PDU_REDIRECT, "redirect"},
+ { ESIS_PDU_ESH, "ESH"},
+ { ESIS_PDU_ISH, "ISH"},
+ { 0, NULL }
+};
+
+struct esis_header_t {
+ nd_uint8_t nlpid;
+ nd_uint8_t length_indicator;
+ nd_uint8_t version;
+ nd_byte reserved;
+ nd_uint8_t type;
+ nd_uint16_t holdtime;
+ nd_uint16_t cksum;
+};
+
+static void
+esis_print(netdissect_options *ndo,
+ const uint8_t *pptr, u_int length)
+{
+ const uint8_t *optr;
+ u_int li, version, esis_pdu_type, source_address_length, source_address_number;
+ const struct esis_header_t *esis_header;
+
+ ndo->ndo_protocol = "esis";
+ if (!ndo->ndo_eflag)
+ ND_PRINT("ES-IS");
+
+ if (length <= 2) {
+ ND_PRINT(ndo->ndo_qflag ? "bad pkt!" : "no header at all!");
+ return;
+ }
+
+ esis_header = (const struct esis_header_t *) pptr;
+ ND_TCHECK_SIZE(esis_header);
+ li = GET_U_1(esis_header->length_indicator);
+ optr = pptr;
+
+ /*
+ * Sanity checking of the header.
+ */
+
+ if (GET_U_1(esis_header->nlpid) != NLPID_ESIS) {
+ ND_PRINT(" nlpid 0x%02x packet not supported",
+ GET_U_1(esis_header->nlpid));
+ return;
+ }
+
+ version = GET_U_1(esis_header->version);
+ if (version != ESIS_VERSION) {
+ ND_PRINT(" version %u packet not supported", version);
+ return;
+ }
+
+ if (li > length) {
+ ND_PRINT(" length indicator(%u) > PDU size (%u)!", li, length);
+ return;
+ }
+
+ if (li < sizeof(struct esis_header_t) + 2) {
+ ND_PRINT(" length indicator %u < min PDU size:", li);
+ while (pptr < ndo->ndo_snapend) {
+ ND_PRINT("%02X", GET_U_1(pptr));
+ pptr++;
+ }
+ return;
+ }
+
+ esis_pdu_type = GET_U_1(esis_header->type) & ESIS_PDU_TYPE_MASK;
+
+ if (ndo->ndo_vflag < 1) {
+ ND_PRINT("%s%s, length %u",
+ ndo->ndo_eflag ? "" : ", ",
+ tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type),
+ length);
+ return;
+ } else
+ ND_PRINT("%slength %u\n\t%s (%u)",
+ ndo->ndo_eflag ? "" : ", ",
+ length,
+ tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type),
+ esis_pdu_type);
+
+ ND_PRINT(", v: %u%s", version, version == ESIS_VERSION ? "" : "unsupported" );
+ ND_PRINT(", checksum: 0x%04x", GET_BE_U_2(esis_header->cksum));
+
+ osi_print_cksum(ndo, pptr, GET_BE_U_2(esis_header->cksum), 7,
+ li);
+
+ ND_PRINT(", holding time: %us, length indicator: %u",
+ GET_BE_U_2(esis_header->holdtime), li);
+
+ if (ndo->ndo_vflag > 1)
+ print_unknown_data(ndo, optr, "\n\t", sizeof(struct esis_header_t));
+
+ pptr += sizeof(struct esis_header_t);
+ li -= sizeof(struct esis_header_t);
+
+ switch (esis_pdu_type) {
+ case ESIS_PDU_REDIRECT: {
+ const uint8_t *dst, *snpa, *neta;
+ u_int dstl, snpal, netal;
+
+ ND_TCHECK_1(pptr);
+ if (li < 1) {
+ ND_PRINT(", bad redirect/li");
+ return;
+ }
+ dstl = GET_U_1(pptr);
+ pptr++;
+ li--;
+ ND_TCHECK_LEN(pptr, dstl);
+ if (li < dstl) {
+ ND_PRINT(", bad redirect/li");
+ return;
+ }
+ dst = pptr;
+ pptr += dstl;
+ li -= dstl;
+ ND_PRINT("\n\t %s", GET_ISONSAP_STRING(dst, dstl));
+
+ ND_TCHECK_1(pptr);
+ if (li < 1) {
+ ND_PRINT(", bad redirect/li");
+ return;
+ }
+ snpal = GET_U_1(pptr);
+ pptr++;
+ li--;
+ ND_TCHECK_LEN(pptr, snpal);
+ if (li < snpal) {
+ ND_PRINT(", bad redirect/li");
+ return;
+ }
+ snpa = pptr;
+ pptr += snpal;
+ li -= snpal;
+ ND_TCHECK_1(pptr);
+ if (li < 1) {
+ ND_PRINT(", bad redirect/li");
+ return;
+ }
+ netal = GET_U_1(pptr);
+ pptr++;
+ ND_TCHECK_LEN(pptr, netal);
+ if (li < netal) {
+ ND_PRINT(", bad redirect/li");
+ return;
+ }
+ neta = pptr;
+ pptr += netal;
+ li -= netal;
+
+ if (snpal == MAC_ADDR_LEN)
+ ND_PRINT("\n\t SNPA (length: %u): %s",
+ snpal,
+ GET_ETHERADDR_STRING(snpa));
+ else
+ ND_PRINT("\n\t SNPA (length: %u): %s",
+ snpal,
+ GET_LINKADDR_STRING(snpa, LINKADDR_OTHER, snpal));
+ if (netal != 0)
+ ND_PRINT("\n\t NET (length: %u) %s",
+ netal,
+ GET_ISONSAP_STRING(neta, netal));
+ break;
+ }
+
+ case ESIS_PDU_ESH:
+ ND_TCHECK_1(pptr);
+ if (li < 1) {
+ ND_PRINT(", bad esh/li");
+ return;
+ }
+ source_address_number = GET_U_1(pptr);
+ pptr++;
+ li--;
+
+ ND_PRINT("\n\t Number of Source Addresses: %u", source_address_number);
+
+ while (source_address_number > 0) {
+ ND_TCHECK_1(pptr);
+ if (li < 1) {
+ ND_PRINT(", bad esh/li");
+ return;
+ }
+ source_address_length = GET_U_1(pptr);
+ pptr++;
+ li--;
+
+ ND_TCHECK_LEN(pptr, source_address_length);
+ if (li < source_address_length) {
+ ND_PRINT(", bad esh/li");
+ return;
+ }
+ ND_PRINT("\n\t NET (length: %u): %s",
+ source_address_length,
+ GET_ISONSAP_STRING(pptr, source_address_length));
+ pptr += source_address_length;
+ li -= source_address_length;
+ source_address_number--;
+ }
+
+ break;
+
+ case ESIS_PDU_ISH: {
+ ND_TCHECK_1(pptr);
+ if (li < 1) {
+ ND_PRINT(", bad ish/li");
+ return;
+ }
+ source_address_length = GET_U_1(pptr);
+ pptr++;
+ li--;
+ ND_TCHECK_LEN(pptr, source_address_length);
+ if (li < source_address_length) {
+ ND_PRINT(", bad ish/li");
+ return;
+ }
+ ND_PRINT("\n\t NET (length: %u): %s", source_address_length, GET_ISONSAP_STRING(pptr, source_address_length));
+ pptr += source_address_length;
+ li -= source_address_length;
+ break;
+ }
+
+ default:
+ if (ndo->ndo_vflag <= 1) {
+ /*
+ * If there's at least one byte to print, print
+ * it/them.
+ */
+ if (ND_TTEST_LEN(pptr, 1))
+ print_unknown_data(ndo, pptr, "\n\t ", ND_BYTES_AVAILABLE_AFTER(pptr));
+ }
+ return;
+ }
+
+ /* now walk the options */
+ while (li != 0) {
+ u_int op, opli;
+ const uint8_t *tptr;
+
+ if (li < 2) {
+ ND_PRINT(", bad opts/li");
+ return;
+ }
+ op = GET_U_1(pptr);
+ opli = GET_U_1(pptr + 1);
+ pptr += 2;
+ li -= 2;
+ if (opli > li) {
+ ND_PRINT(", opt (%u) too long", op);
+ return;
+ }
+ li -= opli;
+ tptr = pptr;
+
+ ND_PRINT("\n\t %s Option #%u, length %u, value: ",
+ tok2str(esis_option_values,"Unknown",op),
+ op,
+ opli);
+
+ switch (op) {
+
+ case ESIS_OPTION_ES_CONF_TIME:
+ if (opli == 2) {
+ ND_TCHECK_2(pptr);
+ ND_PRINT("%us", GET_BE_U_2(tptr));
+ } else
+ ND_PRINT("(bad length)");
+ break;
+
+ case ESIS_OPTION_PROTOCOLS:
+ while (opli>0) {
+ ND_PRINT("%s (0x%02x)",
+ tok2str(nlpid_values,
+ "unknown",
+ GET_U_1(tptr)),
+ GET_U_1(tptr));
+ if (opli>1) /* further NPLIDs ? - put comma */
+ ND_PRINT(", ");
+ tptr++;
+ opli--;
+ }
+ break;
+
+ /*
+ * FIXME those are the defined Options that lack a decoder
+ * you are welcome to contribute code ;-)
+ */
+
+ case ESIS_OPTION_QOS_MAINTENANCE:
+ case ESIS_OPTION_SECURITY:
+ case ESIS_OPTION_PRIORITY:
+ case ESIS_OPTION_ADDRESS_MASK:
+ case ESIS_OPTION_SNPA_MASK:
+
+ default:
+ print_unknown_data(ndo, tptr, "\n\t ", opli);
+ break;
+ }
+ if (ndo->ndo_vflag > 1)
+ print_unknown_data(ndo, pptr, "\n\t ", opli);
+ pptr += opli;
+ }
+ return;
+
+trunc:
+ nd_print_trunc(ndo);
+}
+
+static void
+isis_print_mcid(netdissect_options *ndo,
+ const struct isis_spb_mcid *mcid)
+{
+ int i;
+
+ ND_TCHECK_SIZE(mcid);
+ ND_PRINT("ID: %u, Name: ", GET_U_1(mcid->format_id));
+
+ nd_printjnp(ndo, mcid->name, sizeof(mcid->name));
+
+ ND_PRINT("\n\t Lvl: %u", GET_BE_U_2(mcid->revision_lvl));
+
+ ND_PRINT(", Digest: ");
+
+ for(i=0;i<16;i++)
+ ND_PRINT("%.2x ", mcid->digest[i]);
+ return;
+
+trunc:
+ nd_print_trunc(ndo);
+}
+
+static int
+isis_print_mt_port_cap_subtlv(netdissect_options *ndo,
+ const uint8_t *tptr, u_int len)
+{
+ u_int stlv_type, stlv_len;
+ const struct isis_subtlv_spb_mcid *subtlv_spb_mcid;
+ int i;
+
+ while (len > 2)
+ {
+ stlv_type = GET_U_1(tptr);
+ stlv_len = GET_U_1(tptr + 1);
+
+ /* first lets see if we know the subTLVs name*/
+ ND_PRINT("\n\t %s subTLV #%u, length: %u",
+ tok2str(isis_mt_port_cap_subtlv_values, "unknown", stlv_type),
+ stlv_type,
+ stlv_len);
+
+ tptr += 2;
+ /*len -= TLV_TYPE_LEN_OFFSET;*/
+ len -= 2;
+
+ /* Make sure the subTLV fits within the space left */
+ if (len < stlv_len)
+ goto subtlv_too_long;
+ /* Make sure the entire subTLV is in the captured data */
+ ND_TCHECK_LEN(tptr, stlv_len);
+
+ switch (stlv_type)
+ {
+ case ISIS_SUBTLV_SPB_MCID:
+ {
+ if (stlv_len < ISIS_SUBTLV_SPB_MCID_MIN_LEN)
+ goto subtlv_too_short;
+
+ subtlv_spb_mcid = (const struct isis_subtlv_spb_mcid *)tptr;
+
+ ND_PRINT("\n\t MCID: ");
+ isis_print_mcid(ndo, &(subtlv_spb_mcid->mcid));
+
+ /*tptr += SPB_MCID_MIN_LEN;
+ len -= SPB_MCID_MIN_LEN; */
+
+ ND_PRINT("\n\t AUX-MCID: ");
+ isis_print_mcid(ndo, &(subtlv_spb_mcid->aux_mcid));
+
+ /*tptr += SPB_MCID_MIN_LEN;
+ len -= SPB_MCID_MIN_LEN; */
+ tptr += ISIS_SUBTLV_SPB_MCID_MIN_LEN;
+ len -= ISIS_SUBTLV_SPB_MCID_MIN_LEN;
+ stlv_len -= ISIS_SUBTLV_SPB_MCID_MIN_LEN;
+
+ break;
+ }
+
+ case ISIS_SUBTLV_SPB_DIGEST:
+ {
+ if (stlv_len < ISIS_SUBTLV_SPB_DIGEST_MIN_LEN)
+ goto subtlv_too_short;
+
+ ND_PRINT("\n\t RES: %u V: %u A: %u D: %u",
+ (GET_U_1(tptr) >> 5),
+ ((GET_U_1(tptr) >> 4) & 0x01),
+ ((GET_U_1(tptr) >> 2) & 0x03),
+ (GET_U_1(tptr) & 0x03));
+
+ tptr++;
+
+ ND_PRINT("\n\t Digest: ");
+
+ for(i=1;i<=8; i++)
+ {
+ ND_PRINT("%08x ", GET_BE_U_4(tptr));
+ if (i%4 == 0 && i != 8)
+ ND_PRINT("\n\t ");
+ tptr += 4;
+ }
+
+ len -= ISIS_SUBTLV_SPB_DIGEST_MIN_LEN;
+ stlv_len -= ISIS_SUBTLV_SPB_DIGEST_MIN_LEN;
+
+ break;
+ }
+
+ case ISIS_SUBTLV_SPB_BVID:
+ {
+ while (stlv_len != 0)
+ {
+ if (stlv_len < 4)
+ goto subtlv_too_short;
+ ND_PRINT("\n\t ECT: %08x",
+ GET_BE_U_4(tptr));
+
+ tptr += 4;
+ len -= 4;
+ stlv_len -= 4;
+
+ if (stlv_len < 2)
+ goto subtlv_too_short;
+ ND_PRINT(" BVID: %u, U:%01x M:%01x ",
+ (GET_BE_U_2(tptr) >> 4) ,
+ (GET_BE_U_2(tptr) >> 3) & 0x01,
+ (GET_BE_U_2(tptr) >> 2) & 0x01);
+
+ tptr += 2;
+ len -= 2;
+ stlv_len -= 2;
+ }
+
+ break;
+ }
+
+ default:
+ break;
+ }
+ tptr += stlv_len;
+ len -= stlv_len;
+ }
+ return (0);
+
+trunc:
+ nd_print_trunc(ndo);
+ return (1);
+
+subtlv_too_long:
+ ND_PRINT(" (> containing TLV length)");
+ return (1);
+
+subtlv_too_short:
+ ND_PRINT(" (too short)");
+ return (1);
+}
+
+static int
+isis_print_mt_capability_subtlv(netdissect_options *ndo,
+ const uint8_t *tptr, u_int len)
+{
+ u_int stlv_type, stlv_len, treecount;
+
+ while (len > 2)
+ {
+ stlv_type = GET_U_1(tptr);
+ stlv_len = GET_U_1(tptr + 1);
+ tptr += 2;
+ len -= 2;
+
+ /* first lets see if we know the subTLVs name*/
+ ND_PRINT("\n\t %s subTLV #%u, length: %u",
+ tok2str(isis_mt_capability_subtlv_values, "unknown", stlv_type),
+ stlv_type,
+ stlv_len);
+
+ /* Make sure the subTLV fits within the space left */
+ if (len < stlv_len)
+ goto subtlv_too_long;
+ /* Make sure the entire subTLV is in the captured data */
+ ND_TCHECK_LEN(tptr, stlv_len);
+
+ switch (stlv_type)
+ {
+ case ISIS_SUBTLV_SPB_INSTANCE:
+ if (stlv_len < ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN)
+ goto subtlv_too_short;
+
+ ND_PRINT("\n\t CIST Root-ID: %08x", GET_BE_U_4(tptr));
+ tptr += 4;
+ ND_PRINT(" %08x", GET_BE_U_4(tptr));
+ tptr += 4;
+ ND_PRINT(", Path Cost: %08x", GET_BE_U_4(tptr));
+ tptr += 4;
+ ND_PRINT(", Prio: %u", GET_BE_U_2(tptr));
+ tptr += 2;
+ ND_PRINT("\n\t RES: %u",
+ GET_BE_U_2(tptr) >> 5);
+ ND_PRINT(", V: %u",
+ (GET_BE_U_2(tptr) >> 4) & 0x0001);
+ ND_PRINT(", SPSource-ID: %u",
+ (GET_BE_U_4(tptr) & 0x000fffff));
+ tptr += 4;
+ ND_PRINT(", No of Trees: %x", GET_U_1(tptr));
+
+ treecount = GET_U_1(tptr);
+ tptr++;
+
+ len -= ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN;
+ stlv_len -= ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN;
+
+ while (treecount)
+ {
+ if (stlv_len < ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN)
+ goto trunc;
+
+ ND_PRINT("\n\t U:%u, M:%u, A:%u, RES:%u",
+ GET_U_1(tptr) >> 7,
+ (GET_U_1(tptr) >> 6) & 0x01,
+ (GET_U_1(tptr) >> 5) & 0x01,
+ (GET_U_1(tptr) & 0x1f));
+
+ tptr++;
+
+ ND_PRINT(", ECT: %08x", GET_BE_U_4(tptr));
+
+ tptr += 4;
+
+ ND_PRINT(", BVID: %u, SPVID: %u",
+ (GET_BE_U_3(tptr) >> 12) & 0x000fff,
+ GET_BE_U_3(tptr) & 0x000fff);
+
+ tptr += 3;
+ len -= ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN;
+ stlv_len -= ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN;
+ treecount--;
+ }
+
+ break;
+
+ case ISIS_SUBTLV_SPBM_SI:
+ if (stlv_len < 8)
+ goto trunc;
+
+ ND_PRINT("\n\t BMAC: %08x", GET_BE_U_4(tptr));
+ tptr += 4;
+ ND_PRINT("%04x", GET_BE_U_2(tptr));
+ tptr += 2;
+
+ ND_PRINT(", RES: %u, VID: %u", GET_BE_U_2(tptr) >> 12,
+ (GET_BE_U_2(tptr)) & 0x0fff);
+
+ tptr += 2;
+ len -= 8;
+ stlv_len -= 8;
+
+ while (stlv_len >= 4) {
+ ND_PRINT("\n\t T: %u, R: %u, RES: %u, ISID: %u",
+ (GET_BE_U_4(tptr) >> 31),
+ (GET_BE_U_4(tptr) >> 30) & 0x01,
+ (GET_BE_U_4(tptr) >> 24) & 0x03f,
+ (GET_BE_U_4(tptr)) & 0x0ffffff);
+
+ tptr += 4;
+ len -= 4;
+ stlv_len -= 4;
+ }
+
+ break;
+
+ default:
+ break;
+ }
+ tptr += stlv_len;
+ len -= stlv_len;
+ }
+ return (0);
+
+trunc:
+ nd_print_trunc(ndo);
+ return (1);
+
+subtlv_too_long:
+ ND_PRINT(" (> containing TLV length)");
+ return (1);
+
+subtlv_too_short:
+ ND_PRINT(" (too short)");
+ return (1);
+}
+
+/* shared routine for printing system, node and lsp-ids */
+static char *
+isis_print_id(netdissect_options *ndo, const uint8_t *cp, u_int id_len)
+{
+ u_int i;
+ static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")];
+ char *pos = id;
+ u_int sysid_len;
+
+ sysid_len = SYSTEM_ID_LEN;
+ if (sysid_len > id_len)
+ sysid_len = id_len;
+ for (i = 1; i <= sysid_len; i++) {
+ snprintf(pos, sizeof(id) - (pos - id), "%02x", GET_U_1(cp));
+ cp++;
+ pos += strlen(pos);
+ if (i == 2 || i == 4)
+ *pos++ = '.';
+ }
+ if (id_len >= NODE_ID_LEN) {
+ snprintf(pos, sizeof(id) - (pos - id), ".%02x", GET_U_1(cp));
+ cp++;
+ pos += strlen(pos);
+ }
+ if (id_len == LSP_ID_LEN)
+ snprintf(pos, sizeof(id) - (pos - id), "-%02x", GET_U_1(cp));
+ return (id);
+}
+
+/* print the 4-byte metric block which is common found in the old-style TLVs */
+static int
+isis_print_metric_block(netdissect_options *ndo,
+ const struct isis_metric_block *isis_metric_block)
+{
+ ND_PRINT(", Default Metric: %u, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default),
+ ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal");
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay))
+ ND_PRINT("\n\t\t Delay Metric: %u, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay),
+ ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal");
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense))
+ ND_PRINT("\n\t\t Expense Metric: %u, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense),
+ ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal");
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error))
+ ND_PRINT("\n\t\t Error Metric: %u, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error),
+ ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal");
+
+ return(1); /* everything is ok */
+}
+
+static int
+isis_print_tlv_ip_reach(netdissect_options *ndo,
+ const uint8_t *cp, const char *ident, u_int length)
+{
+ int prefix_len;
+ const struct isis_tlv_ip_reach *tlv_ip_reach;
+
+ tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp;
+
+ while (length > 0) {
+ if ((size_t)length < sizeof(*tlv_ip_reach)) {
+ ND_PRINT("short IPv4 Reachability (%u vs %zu)",
+ length,
+ sizeof(*tlv_ip_reach));
+ return (0);
+ }
+
+ ND_TCHECK_SIZE(tlv_ip_reach);
+
+ prefix_len = mask2plen(GET_IPV4_TO_HOST_ORDER(tlv_ip_reach->mask));
+
+ if (prefix_len == -1)
+ ND_PRINT("%sIPv4 prefix: %s mask %s",
+ ident,
+ GET_IPADDR_STRING(tlv_ip_reach->prefix),
+ GET_IPADDR_STRING(tlv_ip_reach->mask));
+ else
+ ND_PRINT("%sIPv4 prefix: %15s/%u",
+ ident,
+ GET_IPADDR_STRING(tlv_ip_reach->prefix),
+ prefix_len);
+
+ ND_PRINT(", Distribution: %s, Metric: %u, %s",
+ ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up",
+ ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default),
+ ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal");
+
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay))
+ ND_PRINT("%s Delay Metric: %u, %s",
+ ident,
+ ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay),
+ ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal");
+
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense))
+ ND_PRINT("%s Expense Metric: %u, %s",
+ ident,
+ ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense),
+ ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal");
+
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error))
+ ND_PRINT("%s Error Metric: %u, %s",
+ ident,
+ ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error),
+ ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal");
+
+ length -= sizeof(struct isis_tlv_ip_reach);
+ tlv_ip_reach++;
+ }
+ return (1);
+trunc:
+ return 0;
+}
+
+/*
+ * this is the common IP-REACH subTLV decoder it is called
+ * from various EXTD-IP REACH TLVs (135,235,236,237)
+ */
+
+static int
+isis_print_ip_reach_subtlv(netdissect_options *ndo,
+ const uint8_t *tptr, u_int subt, u_int subl,
+ const char *ident)
+{
+ /* first lets see if we know the subTLVs name*/
+ ND_PRINT("%s%s subTLV #%u, length: %u",
+ ident, tok2str(isis_ext_ip_reach_subtlv_values, "unknown", subt),
+ subt, subl);
+
+ ND_TCHECK_LEN(tptr, subl);
+
+ switch(subt) {
+ case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */
+ case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32:
+ while (subl >= 4) {
+ ND_PRINT(", 0x%08x (=%u)",
+ GET_BE_U_4(tptr),
+ GET_BE_U_4(tptr));
+ tptr+=4;
+ subl-=4;
+ }
+ break;
+ case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64:
+ while (subl >= 8) {
+ ND_PRINT(", 0x%08x%08x",
+ GET_BE_U_4(tptr),
+ GET_BE_U_4(tptr + 4));
+ tptr+=8;
+ subl-=8;
+ }
+ break;
+ case ISIS_SUBTLV_EXTD_IP_REACH_PREFIX_SID:
+ {
+ uint8_t algo, flags;
+ uint32_t sid;
+
+ flags = GET_U_1(tptr);
+ algo = GET_U_1(tptr+1);
+
+ if (flags & ISIS_PREFIX_SID_FLAG_V) {
+ if (subl < 5)
+ goto trunc;
+ sid = GET_BE_U_3(tptr+2);
+ tptr+=5;
+ subl-=5;
+ } else {
+ if (subl < 6)
+ goto trunc;
+ sid = GET_BE_U_4(tptr+2);
+ tptr+=6;
+ subl-=6;
+ }
+
+ ND_PRINT(", Flags [%s], Algo %s (%u), %s %u",
+ bittok2str(prefix_sid_flag_values, "None", flags),
+ tok2str(prefix_sid_algo_values, "Unknown", algo), algo,
+ flags & ISIS_PREFIX_SID_FLAG_V ? "label" : "index",
+ sid);
+ }
+ break;
+ default:
+ if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl))
+ return(0);
+ break;
+ }
+ return(1);
+
+trunc:
+ nd_print_trunc(ndo);
+ return(0);
+}
+
+/*
+ * this is the common IS-REACH decoder it is called
+ * from various EXTD-IS REACH style TLVs (22,24,222)
+ */
+
+static int
+isis_print_ext_is_reach(netdissect_options *ndo,
+ const uint8_t *tptr, const char *ident, u_int tlv_type,
+ u_int tlv_remaining)
+{
+ char ident_buffer[20];
+ u_int subtlv_type,subtlv_len,subtlv_sum_len;
+ int proc_bytes = 0; /* how many bytes did we process ? */
+ u_int te_class,priority_level,gmpls_switch_cap;
+ union { /* int to float conversion buffer for several subTLVs */
+ float f;
+ uint32_t i;
+ } bw;
+
+ ND_TCHECK_LEN(tptr, NODE_ID_LEN);
+ if (tlv_remaining < NODE_ID_LEN)
+ return(0);
+
+ ND_PRINT("%sIS Neighbor: %s", ident, isis_print_id(ndo, tptr, NODE_ID_LEN));
+ tptr+=NODE_ID_LEN;
+ tlv_remaining-=NODE_ID_LEN;
+ proc_bytes+=NODE_ID_LEN;
+
+ if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */
+ ND_TCHECK_3(tptr);
+ if (tlv_remaining < 3)
+ return(0);
+ ND_PRINT(", Metric: %u", GET_BE_U_3(tptr));
+ tptr+=3;
+ tlv_remaining-=3;
+ proc_bytes+=3;
+ }
+
+ ND_TCHECK_1(tptr);
+ if (tlv_remaining < 1)
+ return(0);
+ subtlv_sum_len=GET_U_1(tptr); /* read out subTLV length */
+ tptr++;
+ tlv_remaining--;
+ proc_bytes++;
+ ND_PRINT(", %ssub-TLVs present",subtlv_sum_len ? "" : "no ");
+ if (subtlv_sum_len) {
+ ND_PRINT(" (%u)", subtlv_sum_len);
+ /* prepend the indent string */
+ snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
+ ident = ident_buffer;
+ while (subtlv_sum_len != 0) {
+ ND_TCHECK_2(tptr);
+ if (tlv_remaining < 2) {
+ ND_PRINT("%sRemaining data in TLV shorter than a subTLV header",ident);
+ proc_bytes += tlv_remaining;
+ break;
+ }
+ if (subtlv_sum_len < 2) {
+ ND_PRINT("%sRemaining data in subTLVs shorter than a subTLV header",ident);
+ proc_bytes += subtlv_sum_len;
+ break;
+ }
+ subtlv_type=GET_U_1(tptr);
+ subtlv_len=GET_U_1(tptr + 1);
+ tptr += 2;
+ tlv_remaining -= 2;
+ subtlv_sum_len -= 2;
+ proc_bytes += 2;
+ ND_PRINT("%s%s subTLV #%u, length: %u",
+ ident, tok2str(isis_ext_is_reach_subtlv_values, "unknown", subtlv_type),
+ subtlv_type, subtlv_len);
+
+ if (subtlv_sum_len < subtlv_len) {
+ ND_PRINT(" (remaining data in subTLVs shorter than the current subTLV)");
+ proc_bytes += subtlv_sum_len;
+ break;
+ }
+
+ if (tlv_remaining < subtlv_len) {
+ ND_PRINT(" (> remaining tlv length)");
+ proc_bytes += tlv_remaining;
+ break;
+ }
+
+ ND_TCHECK_LEN(tptr, subtlv_len);
+
+ switch(subtlv_type) {
+ case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP:
+ case ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID:
+ case ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID:
+ if (subtlv_len >= 4) {
+ ND_PRINT(", 0x%08x", GET_BE_U_4(tptr));
+ if (subtlv_len == 8) /* rfc4205 */
+ ND_PRINT(", 0x%08x", GET_BE_U_4(tptr + 4));
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR:
+ case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR:
+ if (subtlv_len >= sizeof(nd_ipv4))
+ ND_PRINT(", %s", GET_IPADDR_STRING(tptr));
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW :
+ case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW:
+ if (subtlv_len >= 4) {
+ bw.i = GET_BE_U_4(tptr);
+ ND_PRINT(", %.3f Mbps", bw.f * 8 / 1000000);
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW :
+ if (subtlv_len >= 32) {
+ for (te_class = 0; te_class < 8; te_class++) {
+ bw.i = GET_BE_U_4(tptr);
+ ND_PRINT("%s TE-Class %u: %.3f Mbps",
+ ident,
+ te_class,
+ bw.f * 8 / 1000000);
+ tptr += 4;
+ subtlv_len -= 4;
+ subtlv_sum_len -= 4;
+ proc_bytes += 4;
+ }
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */
+ case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD:
+ if (subtlv_len == 0)
+ break;
+ ND_PRINT("%sBandwidth Constraints Model ID: %s (%u)",
+ ident,
+ tok2str(diffserv_te_bc_values, "unknown", GET_U_1(tptr)),
+ GET_U_1(tptr));
+ tptr++;
+ subtlv_len--;
+ subtlv_sum_len--;
+ proc_bytes++;
+ /* decode BCs until the subTLV ends */
+ for (te_class = 0; subtlv_len != 0; te_class++) {
+ if (subtlv_len < 4)
+ break;
+ bw.i = GET_BE_U_4(tptr);
+ ND_PRINT("%s Bandwidth constraint CT%u: %.3f Mbps",
+ ident,
+ te_class,
+ bw.f * 8 / 1000000);
+ tptr += 4;
+ subtlv_len -= 4;
+ subtlv_sum_len -= 4;
+ proc_bytes += 4;
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC:
+ if (subtlv_len >= 3)
+ ND_PRINT(", %u", GET_BE_U_3(tptr));
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE:
+ if (subtlv_len == 2) {
+ ND_PRINT(", [ %s ] (0x%04x)",
+ bittok2str(isis_subtlv_link_attribute_values,
+ "Unknown",
+ GET_BE_U_2(tptr)),
+ GET_BE_U_2(tptr));
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE:
+ if (subtlv_len >= 2) {
+ ND_PRINT(", %s, Priority %u",
+ bittok2str(gmpls_link_prot_values, "none", GET_U_1(tptr)),
+ GET_U_1(tptr + 1));
+ }
+ break;
+ case ISIS_SUBTLV_SPB_METRIC:
+ if (subtlv_len >= 6) {
+ ND_PRINT(", LM: %u", GET_BE_U_3(tptr));
+ tptr += 3;
+ subtlv_len -= 3;
+ subtlv_sum_len -= 3;
+ proc_bytes += 3;
+ ND_PRINT(", P: %u", GET_U_1(tptr));
+ tptr++;
+ subtlv_len--;
+ subtlv_sum_len--;
+ proc_bytes++;
+ ND_PRINT(", P-ID: %u", GET_BE_U_2(tptr));
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR:
+ if (subtlv_len >= 36) {
+ gmpls_switch_cap = GET_U_1(tptr);
+ ND_PRINT("%s Interface Switching Capability:%s",
+ ident,
+ tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap));
+ ND_PRINT(", LSP Encoding: %s",
+ tok2str(gmpls_encoding_values, "Unknown", GET_U_1((tptr + 1))));
+ tptr += 4;
+ subtlv_len -= 4;
+ subtlv_sum_len -= 4;
+ proc_bytes += 4;
+ ND_PRINT("%s Max LSP Bandwidth:", ident);
+ for (priority_level = 0; priority_level < 8; priority_level++) {
+ bw.i = GET_BE_U_4(tptr);
+ ND_PRINT("%s priority level %u: %.3f Mbps",
+ ident,
+ priority_level,
+ bw.f * 8 / 1000000);
+ tptr += 4;
+ subtlv_len -= 4;
+ subtlv_sum_len -= 4;
+ proc_bytes += 4;
+ }
+ switch (gmpls_switch_cap) {
+ case GMPLS_PSC1:
+ case GMPLS_PSC2:
+ case GMPLS_PSC3:
+ case GMPLS_PSC4:
+ if (subtlv_len < 6)
+ break;
+ bw.i = GET_BE_U_4(tptr);
+ ND_PRINT("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000);
+ ND_PRINT("%s Interface MTU: %u", ident,
+ GET_BE_U_2(tptr + 4));
+ break;
+ case GMPLS_TSC:
+ if (subtlv_len < 8)
+ break;
+ bw.i = GET_BE_U_4(tptr);
+ ND_PRINT("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000);
+ ND_PRINT("%s Indication %s", ident,
+ tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", GET_U_1((tptr + 4))));
+ break;
+ default:
+ /* there is some optional stuff left to decode but this is as of yet
+ not specified so just lets hexdump what is left */
+ if (subtlv_len != 0) {
+ if (!print_unknown_data(ndo, tptr, "\n\t\t ", subtlv_len))
+ return(0);
+ }
+ }
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_LAN_ADJ_SEGMENT_ID:
+ if (subtlv_len >= 8) {
+ ND_PRINT("%s Flags: [%s]", ident,
+ bittok2str(isis_lan_adj_sid_flag_values,
+ "none",
+ GET_U_1(tptr)));
+ int vflag = (GET_U_1(tptr) & 0x20) ? 1:0;
+ int lflag = (GET_U_1(tptr) & 0x10) ? 1:0;
+ tptr++;
+ subtlv_len--;
+ subtlv_sum_len--;
+ proc_bytes++;
+ ND_PRINT("%s Weight: %u", ident, GET_U_1(tptr));
+ tptr++;
+ subtlv_len--;
+ subtlv_sum_len--;
+ proc_bytes++;
+ if(subtlv_len>=SYSTEM_ID_LEN) {
+ ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN);
+ ND_PRINT("%s Neighbor System-ID: %s", ident,
+ isis_print_id(ndo, tptr, SYSTEM_ID_LEN));
+ }
+ /* RFC 8667 section 2.2.2 */
+ /* if V-flag is set to 1 and L-flag is set to 1 ==> 3 octet label */
+ /* if V-flag is set to 0 and L-flag is set to 0 ==> 4 octet index */
+ if (vflag && lflag) {
+ ND_PRINT("%s Label: %u",
+ ident, GET_BE_U_3(tptr+SYSTEM_ID_LEN));
+ } else if ((!vflag) && (!lflag)) {
+ ND_PRINT("%s Index: %u",
+ ident, GET_BE_U_4(tptr+SYSTEM_ID_LEN));
+ } else
+ nd_print_invalid(ndo);
+ }
+ break;
+ default:
+ if (!print_unknown_data(ndo, tptr, "\n\t\t ", subtlv_len))
+ return(0);
+ break;
+ }
+
+ tptr += subtlv_len;
+ tlv_remaining -= subtlv_len;
+ subtlv_sum_len -= subtlv_len;
+ proc_bytes += subtlv_len;
+ }
+ }
+ return(proc_bytes);
+
+trunc:
+ return(0);
+}
+
+/*
+ * this is the common Multi Topology ID decoder
+ * it is called from various MT-TLVs (222,229,235,237)
+ */
+
+static uint8_t
+isis_print_mtid(netdissect_options *ndo,
+ const uint8_t *tptr, const char *ident, u_int tlv_remaining)
+{
+ if (tlv_remaining < 2)
+ goto trunc;
+
+ ND_PRINT("%s%s",
+ ident,
+ tok2str(isis_mt_values,
+ "Reserved for IETF Consensus",
+ ISIS_MASK_MTID(GET_BE_U_2(tptr))));
+
+ ND_PRINT(" Topology (0x%03x), Flags: [%s]",
+ ISIS_MASK_MTID(GET_BE_U_2(tptr)),
+ bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(GET_BE_U_2(tptr))));
+
+ return(2);
+trunc:
+ return 0;
+}
+
+/*
+ * this is the common extended IP reach decoder
+ * it is called from TLVs (135,235,236,237)
+ * we process the TLV and optional subTLVs and return
+ * the amount of processed bytes
+ */
+
+static u_int
+isis_print_extd_ip_reach(netdissect_options *ndo,
+ const uint8_t *tptr, const char *ident, uint16_t afi)
+{
+ char ident_buffer[20];
+ uint8_t prefix[sizeof(nd_ipv6)]; /* shared copy buffer for IPv4 and IPv6 prefixes */
+ u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen;
+
+ metric = GET_BE_U_4(tptr);
+ processed=4;
+ tptr+=4;
+
+ if (afi == AF_INET) {
+ status_byte=GET_U_1(tptr);
+ tptr++;
+ bit_length = status_byte&0x3f;
+ if (bit_length > 32) {
+ ND_PRINT("%sIPv4 prefix: bad bit length %u",
+ ident,
+ bit_length);
+ return (0);
+ }
+ processed++;
+ } else if (afi == AF_INET6) {
+ status_byte=GET_U_1(tptr);
+ bit_length=GET_U_1(tptr + 1);
+ if (bit_length > 128) {
+ ND_PRINT("%sIPv6 prefix: bad bit length %u",
+ ident,
+ bit_length);
+ return (0);
+ }
+ tptr+=2;
+ processed+=2;
+ } else
+ return (0); /* somebody is fooling us */
+
+ byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */
+
+ memset(prefix, 0, sizeof(prefix)); /* clear the copy buffer */
+ GET_CPY_BYTES(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */
+ tptr+=byte_length;
+ processed+=byte_length;
+
+ if (afi == AF_INET)
+ ND_PRINT("%sIPv4 prefix: %15s/%u",
+ ident,
+ ipaddr_string(ndo, prefix), /* local buffer, not packet data; don't use GET_IPADDR_STRING() */
+ bit_length);
+ else if (afi == AF_INET6)
+ ND_PRINT("%sIPv6 prefix: %s/%u",
+ ident,
+ ip6addr_string(ndo, prefix), /* local buffer, not packet data; don't use GET_IP6ADDR_STRING() */
+ bit_length);
+
+ ND_PRINT(", Distribution: %s, Metric: %u",
+ ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up",
+ metric);
+
+ if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
+ ND_PRINT(", sub-TLVs present");
+ else if (afi == AF_INET6)
+ ND_PRINT(", %s%s",
+ ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal",
+ ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : "");
+
+ if ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
+ || (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte))
+ ) {
+ /* assume that one prefix can hold more
+ than one subTLV - therefore the first byte must reflect
+ the aggregate bytecount of the subTLVs for this prefix
+ */
+ sublen=GET_U_1(tptr);
+ tptr++;
+ processed+=sublen+1;
+ ND_PRINT(" (%u)", sublen); /* print out subTLV length */
+
+ while (sublen>0) {
+ subtlvtype=GET_U_1(tptr);
+ subtlvlen=GET_U_1(tptr + 1);
+ tptr+=2;
+ /* prepend the indent string */
+ snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
+ if (!isis_print_ip_reach_subtlv(ndo, tptr, subtlvtype, subtlvlen, ident_buffer))
+ return(0);
+ tptr+=subtlvlen;
+ sublen-=(subtlvlen+2);
+ }
+ }
+ return (processed);
+}
+
+static void
+isis_print_router_cap_subtlv(netdissect_options *ndo, const uint8_t *tptr, uint8_t tlen)
+{
+ uint8_t subt, subl;
+
+ while (tlen >= 2) {
+ subt = GET_U_1(tptr);
+ subl = GET_U_1(tptr+1);
+ tlen -= 2;
+ tptr += 2;
+
+ /* first lets see if we know the subTLVs name*/
+ ND_PRINT("\n\t\t%s subTLV #%u, length: %u",
+ tok2str(isis_router_capability_subtlv_values, "unknown", subt),
+ subt, subl);
+
+ /*
+ * Boundary check.
+ */
+ if (subl > tlen) {
+ break;
+ }
+ ND_TCHECK_LEN(tptr, subl);
+
+ switch (subt) {
+ case ISIS_SUBTLV_ROUTER_CAP_SR:
+ {
+ uint8_t flags, sid_tlen, sid_type, sid_len;
+ uint32_t range;
+ const uint8_t *sid_ptr;
+
+ flags = GET_U_1(tptr);
+ range = GET_BE_U_3(tptr+1);
+ ND_PRINT(", Flags [%s], Range %u",
+ bittok2str(isis_router_capability_sr_flags, "None", flags),
+ range);
+ sid_ptr = tptr + 4;
+ sid_tlen = subl - 4;
+
+ while (sid_tlen >= 5) {
+ sid_type = GET_U_1(sid_ptr);
+ sid_len = GET_U_1(sid_ptr+1);
+ sid_tlen -= 2;
+ sid_ptr += 2;
+
+ /*
+ * Boundary check.
+ */
+ if (sid_len > sid_tlen) {
+ break;
+ }
+
+ switch (sid_type) {
+ case 1:
+ if (sid_len == 3) {
+ ND_PRINT(", SID value %u", GET_BE_U_3(sid_ptr));
+ } else if (sid_len == 4) {
+ ND_PRINT(", SID value %u", GET_BE_U_4(sid_ptr));
+ } else {
+ ND_PRINT(", Unknown SID length%u", sid_len);
+ }
+ break;
+ default:
+ print_unknown_data(ndo, sid_ptr, "\n\t\t ", sid_len);
+ }
+
+ sid_ptr += sid_len;
+ sid_tlen -= sid_len;
+ }
+ }
+ break;
+ default:
+ print_unknown_data(ndo, tptr, "\n\t\t", subl);
+ break;
+ }
+
+ tlen -= subl;
+ tptr += subl;
+ }
+ trunc:
+ return;
+}
+
+/*
+ * Clear checksum and lifetime prior to signature verification.
+ */
+static void
+isis_clear_checksum_lifetime(void *header)
+{
+ struct isis_lsp_header *header_lsp = (struct isis_lsp_header *) header;
+
+ header_lsp->checksum[0] = 0;
+ header_lsp->checksum[1] = 0;
+ header_lsp->remaining_lifetime[0] = 0;
+ header_lsp->remaining_lifetime[1] = 0;
+}
+
+/*
+ * isis_print
+ * Decode IS-IS packets. Return 0 on error.
+ */
+
+#define INVALID_OR_DECREMENT(length,decr) \
+ if ((length) < (decr)) { \
+ ND_PRINT(" [packet length %u < %zu]", (length), (decr)); \
+ nd_print_invalid(ndo); \
+ return 1; \
+ } \
+ length -= (decr);
+
+static int
+isis_print(netdissect_options *ndo,
+ const uint8_t *p, u_int length)
+{
+ const struct isis_common_header *isis_header;
+
+ const struct isis_iih_lan_header *header_iih_lan;
+ const struct isis_iih_ptp_header *header_iih_ptp;
+ const struct isis_lsp_header *header_lsp;
+ const struct isis_csnp_header *header_csnp;
+ const struct isis_psnp_header *header_psnp;
+
+ const struct isis_tlv_lsp *tlv_lsp;
+ const struct isis_tlv_ptp_adj *tlv_ptp_adj;
+ const struct isis_tlv_is_reach *tlv_is_reach;
+ const struct isis_tlv_es_reach *tlv_es_reach;
+
+ uint8_t version, pdu_version, fixed_len;
+ uint8_t pdu_type, pdu_max_area, max_area, pdu_id_length, id_length, tlv_type, tlv_len, tlen, alen, prefix_len;
+ u_int ext_is_len, ext_ip_len;
+ uint8_t mt_len;
+ uint8_t isis_subtlv_idrp;
+ const uint8_t *optr, *pptr, *tptr;
+ u_int packet_len;
+ u_short pdu_len, key_id;
+ u_int i,vendor_id, num_vals;
+ uint8_t auth_type;
+ uint8_t num_system_ids;
+ int sigcheck;
+
+ ndo->ndo_protocol = "isis";
+ packet_len=length;
+ optr = p; /* initialize the _o_riginal pointer to the packet start -
+ need it for parsing the checksum TLV and authentication
+ TLV verification */
+ isis_header = (const struct isis_common_header *)p;
+ ND_TCHECK_SIZE(isis_header);
+ if (length < ISIS_COMMON_HEADER_SIZE)
+ goto trunc;
+ pptr = p+(ISIS_COMMON_HEADER_SIZE);
+ header_iih_lan = (const struct isis_iih_lan_header *)pptr;
+ header_iih_ptp = (const struct isis_iih_ptp_header *)pptr;
+ header_lsp = (const struct isis_lsp_header *)pptr;
+ header_csnp = (const struct isis_csnp_header *)pptr;
+ header_psnp = (const struct isis_psnp_header *)pptr;
+
+ if (!ndo->ndo_eflag)
+ ND_PRINT("IS-IS");
+
+ /*
+ * Sanity checking of the header.
+ */
+
+ version = GET_U_1(isis_header->version);
+ if (version != ISIS_VERSION) {
+ ND_PRINT("version %u packet not supported", version);
+ return (0);
+ }
+
+ pdu_id_length = GET_U_1(isis_header->id_length);
+ if ((pdu_id_length != SYSTEM_ID_LEN) && (pdu_id_length != 0)) {
+ ND_PRINT("system ID length of %u is not supported",
+ pdu_id_length);
+ return (0);
+ }
+
+ pdu_version = GET_U_1(isis_header->pdu_version);
+ if (pdu_version != ISIS_VERSION) {
+ ND_PRINT("version %u packet not supported", pdu_version);
+ return (0);
+ }
+
+ fixed_len = GET_U_1(isis_header->fixed_len);
+ if (length < fixed_len) {
+ ND_PRINT("fixed header length %u > packet length %u", fixed_len, length);
+ return (0);
+ }
+
+ if (fixed_len < ISIS_COMMON_HEADER_SIZE) {
+ ND_PRINT("fixed header length %u < minimum header size %u", fixed_len, (u_int)ISIS_COMMON_HEADER_SIZE);
+ return (0);
+ }
+
+ pdu_max_area = GET_U_1(isis_header->max_area);
+ switch(pdu_max_area) {
+ case 0:
+ max_area = 3; /* silly shit */
+ break;
+ case 255:
+ ND_PRINT("bad packet -- 255 areas");
+ return (0);
+ default:
+ max_area = pdu_max_area;
+ break;
+ }
+
+ switch(pdu_id_length) {
+ case 0:
+ id_length = 6; /* silly shit again */
+ break;
+ case 1: /* 1-8 are valid sys-ID lengths */
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ case 6:
+ case 7:
+ case 8:
+ id_length = pdu_id_length;
+ break;
+ case 255:
+ id_length = 0; /* entirely useless */
+ break;
+ default:
+ id_length = pdu_id_length;
+ break;
+ }
+
+ /* toss any non 6-byte sys-ID len PDUs */
+ if (id_length != 6 ) {
+ ND_PRINT("bad packet -- illegal sys-ID length (%u)", id_length);
+ return (0);
+ }
+
+ pdu_type = GET_U_1(isis_header->pdu_type);
+
+ /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT("%s%s",
+ ndo->ndo_eflag ? "" : ", ",
+ tok2str(isis_pdu_values, "unknown PDU-Type %u", pdu_type));
+ } else {
+ /* ok they seem to want to know everything - lets fully decode it */
+ ND_PRINT("%slength %u", ndo->ndo_eflag ? "" : ", ", length);
+
+ ND_PRINT("\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)",
+ tok2str(isis_pdu_values,
+ "unknown, type %u",
+ pdu_type),
+ fixed_len,
+ version,
+ pdu_version,
+ id_length,
+ pdu_id_length,
+ max_area,
+ pdu_max_area);
+
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, optr, "\n\t", 8)) /* provide the _o_riginal pointer */
+ return (0); /* for optionally debugging the common header */
+ }
+ }
+
+ switch (pdu_type) {
+
+ case ISIS_PDU_L1_LAN_IIH:
+ case ISIS_PDU_L2_LAN_IIH:
+ if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) {
+ ND_PRINT(", bogus fixed header length %u should be %zu",
+ fixed_len, ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
+ return (0);
+ }
+ ND_TCHECK_SIZE(header_iih_lan);
+ if (length < ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)
+ goto trunc;
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", src-id %s",
+ isis_print_id(ndo, header_iih_lan->source_id, SYSTEM_ID_LEN));
+ ND_PRINT(", lan-id %s, prio %u",
+ isis_print_id(ndo, header_iih_lan->lan_id,NODE_ID_LEN),
+ GET_U_1(header_iih_lan->priority));
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
+ pdu_len=GET_BE_U_2(header_iih_lan->pdu_len);
+ if (packet_len>pdu_len) {
+ packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
+ length=pdu_len;
+ }
+
+ ND_PRINT("\n\t source-id: %s, holding time: %us, Flags: [%s]",
+ isis_print_id(ndo, header_iih_lan->source_id,SYSTEM_ID_LEN),
+ GET_BE_U_2(header_iih_lan->holding_time),
+ tok2str(isis_iih_circuit_type_values,
+ "unknown circuit type 0x%02x",
+ GET_U_1(header_iih_lan->circuit_type)));
+
+ ND_PRINT("\n\t lan-id: %s, Priority: %u, PDU length: %u",
+ isis_print_id(ndo, header_iih_lan->lan_id, NODE_ID_LEN),
+ GET_U_1(header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK,
+ pdu_len);
+
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_LAN_HEADER_SIZE))
+ return (0);
+ }
+
+ INVALID_OR_DECREMENT(packet_len,ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
+ break;
+
+ case ISIS_PDU_PTP_IIH:
+ if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) {
+ ND_PRINT(", bogus fixed header length %u should be %zu",
+ fixed_len, ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
+ return (0);
+ }
+ ND_TCHECK_SIZE(header_iih_ptp);
+ if (length < ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)
+ goto trunc;
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", src-id %s", isis_print_id(ndo, header_iih_ptp->source_id, SYSTEM_ID_LEN));
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
+ pdu_len=GET_BE_U_2(header_iih_ptp->pdu_len);
+ if (packet_len>pdu_len) {
+ packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
+ length=pdu_len;
+ }
+
+ ND_PRINT("\n\t source-id: %s, holding time: %us, Flags: [%s]",
+ isis_print_id(ndo, header_iih_ptp->source_id,SYSTEM_ID_LEN),
+ GET_BE_U_2(header_iih_ptp->holding_time),
+ tok2str(isis_iih_circuit_type_values,
+ "unknown circuit type 0x%02x",
+ GET_U_1(header_iih_ptp->circuit_type)));
+
+ ND_PRINT("\n\t circuit-id: 0x%02x, PDU length: %u",
+ GET_U_1(header_iih_ptp->circuit_id),
+ pdu_len);
+
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_PTP_HEADER_SIZE))
+ return (0);
+ }
+ INVALID_OR_DECREMENT(packet_len,ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
+ break;
+
+ case ISIS_PDU_L1_LSP:
+ case ISIS_PDU_L2_LSP:
+ if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) {
+ ND_PRINT(", bogus fixed header length %u should be %zu",
+ fixed_len, ISIS_LSP_HEADER_SIZE);
+ return (0);
+ }
+ ND_TCHECK_SIZE(header_lsp);
+ if (length < ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)
+ goto trunc;
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", lsp-id %s, seq 0x%08x, lifetime %5us",
+ isis_print_id(ndo, header_lsp->lsp_id, LSP_ID_LEN),
+ GET_BE_U_4(header_lsp->sequence_number),
+ GET_BE_U_2(header_lsp->remaining_lifetime));
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
+ pdu_len=GET_BE_U_2(header_lsp->pdu_len);
+ if (packet_len>pdu_len) {
+ packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
+ length=pdu_len;
+ }
+
+ ND_PRINT("\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x",
+ isis_print_id(ndo, header_lsp->lsp_id, LSP_ID_LEN),
+ GET_BE_U_4(header_lsp->sequence_number),
+ GET_BE_U_2(header_lsp->remaining_lifetime),
+ GET_BE_U_2(header_lsp->checksum));
+
+ osi_print_cksum(ndo, (const uint8_t *)header_lsp->lsp_id,
+ GET_BE_U_2(header_lsp->checksum),
+ 12, length-12);
+
+ ND_PRINT(", PDU length: %u, Flags: [ %s",
+ pdu_len,
+ ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : "");
+
+ if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) {
+ ND_PRINT("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : "");
+ ND_PRINT("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : "");
+ ND_PRINT("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : "");
+ ND_PRINT("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : "");
+ ND_PRINT("ATT bit set, ");
+ }
+ ND_PRINT("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : "");
+ ND_PRINT("%s ]", tok2str(isis_lsp_istype_values, "Unknown(0x%x)",
+ ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock)));
+
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_LSP_HEADER_SIZE))
+ return (0);
+ }
+
+ INVALID_OR_DECREMENT(packet_len,ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
+ break;
+
+ case ISIS_PDU_L1_CSNP:
+ case ISIS_PDU_L2_CSNP:
+ if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) {
+ ND_PRINT(", bogus fixed header length %u should be %zu",
+ fixed_len, ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
+ return (0);
+ }
+ ND_TCHECK_SIZE(header_csnp);
+ if (length < ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)
+ goto trunc;
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", src-id %s", isis_print_id(ndo, header_csnp->source_id, NODE_ID_LEN));
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
+ pdu_len=GET_BE_U_2(header_csnp->pdu_len);
+ if (packet_len>pdu_len) {
+ packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
+ length=pdu_len;
+ }
+
+ ND_PRINT("\n\t source-id: %s, PDU length: %u",
+ isis_print_id(ndo, header_csnp->source_id, NODE_ID_LEN),
+ pdu_len);
+ ND_PRINT("\n\t start lsp-id: %s",
+ isis_print_id(ndo, header_csnp->start_lsp_id, LSP_ID_LEN));
+ ND_PRINT("\n\t end lsp-id: %s",
+ isis_print_id(ndo, header_csnp->end_lsp_id, LSP_ID_LEN));
+
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_CSNP_HEADER_SIZE))
+ return (0);
+ }
+
+ INVALID_OR_DECREMENT(packet_len,ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
+ break;
+
+ case ISIS_PDU_L1_PSNP:
+ case ISIS_PDU_L2_PSNP:
+ if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) {
+ ND_PRINT("- bogus fixed header length %u should be %zu",
+ fixed_len, ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
+ return (0);
+ }
+ ND_TCHECK_SIZE(header_psnp);
+ if (length < ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)
+ goto trunc;
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", src-id %s", isis_print_id(ndo, header_psnp->source_id, NODE_ID_LEN));
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
+ pdu_len=GET_BE_U_2(header_psnp->pdu_len);
+ if (packet_len>pdu_len) {
+ packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
+ length=pdu_len;
+ }
+
+ ND_PRINT("\n\t source-id: %s, PDU length: %u",
+ isis_print_id(ndo, header_psnp->source_id, NODE_ID_LEN),
+ pdu_len);
+
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_PSNP_HEADER_SIZE))
+ return (0);
+ }
+
+ INVALID_OR_DECREMENT(packet_len,ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
+ break;
+
+ default:
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
+ (void)print_unknown_data(ndo, pptr, "\n\t ", length);
+ return (0);
+ }
+
+ /*
+ * Now print the TLV's.
+ */
+
+ while (packet_len > 0) {
+ ND_TCHECK_2(pptr);
+ if (packet_len < 2)
+ goto trunc;
+ tlv_type = GET_U_1(pptr);
+ tlv_len = GET_U_1(pptr + 1);
+ pptr += 2;
+ packet_len -= 2;
+ tlen = tlv_len; /* copy temporary len & pointer to packet data */
+ tptr = pptr;
+
+ /* first lets see if we know the TLVs name*/
+ ND_PRINT("\n\t %s TLV #%u, length: %u",
+ tok2str(isis_tlv_values,
+ "unknown",
+ tlv_type),
+ tlv_type,
+ tlv_len);
+
+ if (packet_len < tlv_len)
+ goto trunc;
+
+ /* now check if we have a decoder otherwise do a hexdump at the end*/
+ switch (tlv_type) {
+ case ISIS_TLV_AREA_ADDR:
+ while (tlen != 0) {
+ alen = GET_U_1(tptr);
+ tptr++;
+ tlen--;
+ if (tlen < alen)
+ goto tlv_trunc;
+ ND_PRINT("\n\t Area address (length: %u): %s",
+ alen,
+ GET_ISONSAP_STRING(tptr, alen));
+ tptr += alen;
+ tlen -= alen;
+ }
+ break;
+ case ISIS_TLV_ISNEIGH:
+ while (tlen != 0) {
+ if (tlen < MAC_ADDR_LEN)
+ goto tlv_trunc;
+ ND_TCHECK_LEN(tptr, MAC_ADDR_LEN);
+ ND_PRINT("\n\t SNPA: %s", isis_print_id(ndo, tptr, MAC_ADDR_LEN));
+ tlen -= MAC_ADDR_LEN;
+ tptr += MAC_ADDR_LEN;
+ }
+ break;
+
+ case ISIS_TLV_INSTANCE_ID:
+ if (tlen < 4)
+ goto tlv_trunc;
+ num_vals = (tlen-2)/2;
+ ND_PRINT("\n\t Instance ID: %u, ITIDs(%u)%s ",
+ GET_BE_U_2(tptr), num_vals,
+ num_vals ? ":" : "");
+ tptr += 2;
+ tlen -= 2;
+ for (i=0; i < num_vals; i++) {
+ ND_PRINT("%u", GET_BE_U_2(tptr));
+ if (i < (num_vals - 1)) {
+ ND_PRINT(", ");
+ }
+ tptr += 2;
+ tlen -= 2;
+ }
+ break;
+
+ case ISIS_TLV_PADDING:
+ break;
+
+ case ISIS_TLV_MT_IS_REACH:
+ mt_len = isis_print_mtid(ndo, tptr, "\n\t ", tlen);
+ if (mt_len == 0) /* did something go wrong ? */
+ goto trunc;
+ tptr+=mt_len;
+ tlen-=mt_len;
+ while (tlen != 0) {
+ ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tlen);
+ if (ext_is_len == 0) /* did something go wrong ? */
+ goto trunc;
+ if (tlen < ext_is_len) {
+ ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_is_len);
+ nd_print_invalid(ndo);
+ break;
+ }
+ tlen-=(uint8_t)ext_is_len;
+ tptr+=(uint8_t)ext_is_len;
+ }
+ break;
+
+ case ISIS_TLV_IS_ALIAS_ID:
+ while (tlen != 0) {
+ ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tlen);
+ if (ext_is_len == 0) /* did something go wrong ? */
+ goto trunc;
+ if (tlen < ext_is_len) {
+ ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_is_len);
+ nd_print_invalid(ndo);
+ break;
+ }
+ tlen-=(uint8_t)ext_is_len;
+ tptr+=(uint8_t)ext_is_len;
+ }
+ break;
+
+ case ISIS_TLV_EXT_IS_REACH:
+ while (tlen != 0) {
+ ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tlen);
+ if (ext_is_len == 0) /* did something go wrong ? */
+ goto trunc;
+ if (tlen < ext_is_len) {
+ ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_is_len);
+ nd_print_invalid(ndo);
+ break;
+ }
+ tlen-=(uint8_t)ext_is_len;
+ tptr+=(uint8_t)ext_is_len;
+ }
+ break;
+ case ISIS_TLV_IS_REACH:
+ if (tlen < 1)
+ goto tlv_trunc;
+ ND_PRINT("\n\t %s",
+ tok2str(isis_is_reach_virtual_values,
+ "bogus virtual flag 0x%02x",
+ GET_U_1(tptr)));
+ tptr++;
+ tlen--;
+ tlv_is_reach = (const struct isis_tlv_is_reach *)tptr;
+ while (tlen != 0) {
+ if (tlen < sizeof(struct isis_tlv_is_reach))
+ goto tlv_trunc;
+ ND_TCHECK_SIZE(tlv_is_reach);
+ ND_PRINT("\n\t IS Neighbor: %s",
+ isis_print_id(ndo, tlv_is_reach->neighbor_nodeid, NODE_ID_LEN));
+ isis_print_metric_block(ndo, &tlv_is_reach->isis_metric_block);
+ tlen -= sizeof(struct isis_tlv_is_reach);
+ tlv_is_reach++;
+ }
+ break;
+
+ case ISIS_TLV_ESNEIGH:
+ tlv_es_reach = (const struct isis_tlv_es_reach *)tptr;
+ while (tlen != 0) {
+ if (tlen < sizeof(struct isis_tlv_es_reach))
+ goto tlv_trunc;
+ ND_TCHECK_SIZE(tlv_es_reach);
+ ND_PRINT("\n\t ES Neighbor: %s",
+ isis_print_id(ndo, tlv_es_reach->neighbor_sysid, SYSTEM_ID_LEN));
+ isis_print_metric_block(ndo, &tlv_es_reach->isis_metric_block);
+ tlen -= sizeof(struct isis_tlv_es_reach);
+ tlv_es_reach++;
+ }
+ break;
+
+ /* those two TLVs share the same format */
+ case ISIS_TLV_INT_IP_REACH:
+ case ISIS_TLV_EXT_IP_REACH:
+ if (!isis_print_tlv_ip_reach(ndo, pptr, "\n\t ", tlv_len))
+ return (1);
+ break;
+
+ case ISIS_TLV_EXTD_IP_REACH:
+ while (tlen != 0) {
+ ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET);
+ if (ext_ip_len == 0) /* did something go wrong ? */
+ goto trunc;
+ if (tlen < ext_ip_len) {
+ ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_ip_len);
+ nd_print_invalid(ndo);
+ break;
+ }
+ tlen-=(uint8_t)ext_ip_len;
+ tptr+=(uint8_t)ext_ip_len;
+ }
+ break;
+
+ case ISIS_TLV_MT_IP_REACH:
+ mt_len = isis_print_mtid(ndo, tptr, "\n\t ", tlen);
+ if (mt_len == 0) { /* did something go wrong ? */
+ goto trunc;
+ }
+ tptr+=mt_len;
+ tlen-=mt_len;
+
+ while (tlen != 0) {
+ ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET);
+ if (ext_ip_len == 0) /* did something go wrong ? */
+ goto trunc;
+ if (tlen < ext_ip_len) {
+ ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_ip_len);
+ nd_print_invalid(ndo);
+ break;
+ }
+ tlen-=(uint8_t)ext_ip_len;
+ tptr+=(uint8_t)ext_ip_len;
+ }
+ break;
+
+ case ISIS_TLV_IP6_REACH:
+ while (tlen != 0) {
+ ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6);
+ if (ext_ip_len == 0) /* did something go wrong ? */
+ goto trunc;
+ if (tlen < ext_ip_len) {
+ ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_ip_len);
+ nd_print_invalid(ndo);
+ break;
+ }
+ tlen-=(uint8_t)ext_ip_len;
+ tptr+=(uint8_t)ext_ip_len;
+ }
+ break;
+
+ case ISIS_TLV_MT_IP6_REACH:
+ mt_len = isis_print_mtid(ndo, tptr, "\n\t ", tlen);
+ if (mt_len == 0) { /* did something go wrong ? */
+ goto trunc;
+ }
+ tptr+=mt_len;
+ tlen-=mt_len;
+
+ while (tlen != 0) {
+ ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6);
+ if (ext_ip_len == 0) /* did something go wrong ? */
+ goto trunc;
+ if (tlen < ext_ip_len) {
+ ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_ip_len);
+ nd_print_invalid(ndo);
+ break;
+ }
+ tlen-=(uint8_t)ext_ip_len;
+ tptr+=(uint8_t)ext_ip_len;
+ }
+ break;
+
+ case ISIS_TLV_IP6ADDR:
+ while (tlen != 0) {
+ if (tlen < sizeof(nd_ipv6))
+ goto tlv_trunc;
+ ND_PRINT("\n\t IPv6 interface address: %s",
+ GET_IP6ADDR_STRING(tptr));
+
+ tptr += sizeof(nd_ipv6);
+ tlen -= sizeof(nd_ipv6);
+ }
+ break;
+ case ISIS_TLV_AUTH:
+ if (tlen < 1)
+ goto tlv_trunc;
+ auth_type = GET_U_1(tptr);
+ tptr++;
+ tlen--;
+
+ ND_PRINT("\n\t %s: ",
+ tok2str(isis_subtlv_auth_values,
+ "unknown Authentication type 0x%02x",
+ auth_type));
+
+ switch (auth_type) {
+ case ISIS_SUBTLV_AUTH_SIMPLE:
+ nd_printjnp(ndo, tptr, tlen);
+ break;
+ case ISIS_SUBTLV_AUTH_MD5:
+ for(i=0;i<tlen;i++) {
+ ND_PRINT("%02x", GET_U_1(tptr + i));
+ }
+ if (tlen != ISIS_SUBTLV_AUTH_MD5_LEN)
+ ND_PRINT(", (invalid subTLV) ");
+
+ sigcheck = signature_verify(ndo, optr, length, tptr,
+ isis_clear_checksum_lifetime,
+ header_lsp);
+ ND_PRINT(" (%s)", tok2str(signature_check_values, "Unknown", sigcheck));
+
+ break;
+ case ISIS_SUBTLV_AUTH_GENERIC:
+ if (tlen < 2)
+ goto tlv_trunc;
+ key_id = GET_BE_U_2(tptr);
+ ND_PRINT("%u, password: ", key_id);
+ tptr += 2;
+ tlen -= 2;
+ for(i=0;i<tlen;i++) {
+ ND_PRINT("%02x", GET_U_1(tptr + i));
+ }
+ break;
+ case ISIS_SUBTLV_AUTH_PRIVATE:
+ default:
+ if (!print_unknown_data(ndo, tptr, "\n\t\t ", tlen))
+ return(0);
+ break;
+ }
+ break;
+
+ case ISIS_TLV_PTP_ADJ:
+ tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr;
+ if(tlen>=1) {
+ ND_PRINT("\n\t Adjacency State: %s (%u)",
+ tok2str(isis_ptp_adjancey_values, "unknown", GET_U_1(tptr)),
+ GET_U_1(tptr));
+ tlen--;
+ }
+ if(tlen>sizeof(tlv_ptp_adj->extd_local_circuit_id)) {
+ ND_PRINT("\n\t Extended Local circuit-ID: 0x%08x",
+ GET_BE_U_4(tlv_ptp_adj->extd_local_circuit_id));
+ tlen-=sizeof(tlv_ptp_adj->extd_local_circuit_id);
+ }
+ if(tlen>=SYSTEM_ID_LEN) {
+ ND_TCHECK_LEN(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN);
+ ND_PRINT("\n\t Neighbor System-ID: %s",
+ isis_print_id(ndo, tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN));
+ tlen-=SYSTEM_ID_LEN;
+ }
+ if(tlen>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) {
+ ND_PRINT("\n\t Neighbor Extended Local circuit-ID: 0x%08x",
+ GET_BE_U_4(tlv_ptp_adj->neighbor_extd_local_circuit_id));
+ }
+ break;
+
+ case ISIS_TLV_PROTOCOLS:
+ ND_PRINT("\n\t NLPID(s): ");
+ while (tlen != 0) {
+ ND_PRINT("%s (0x%02x)",
+ tok2str(nlpid_values,
+ "unknown",
+ GET_U_1(tptr)),
+ GET_U_1(tptr));
+ if (tlen>1) /* further NPLIDs ? - put comma */
+ ND_PRINT(", ");
+ tptr++;
+ tlen--;
+ }
+ break;
+
+ case ISIS_TLV_MT_PORT_CAP:
+ {
+ if (tlen < 2)
+ goto tlv_trunc;
+
+ ND_PRINT("\n\t RES: %u, MTID(s): %u",
+ (GET_BE_U_2(tptr) >> 12),
+ (GET_BE_U_2(tptr) & 0x0fff));
+
+ tptr += 2;
+ tlen -= 2;
+
+ if (tlen)
+ isis_print_mt_port_cap_subtlv(ndo, tptr, tlen);
+
+ break;
+ }
+
+ case ISIS_TLV_MT_CAPABILITY:
+ if (tlen < 2)
+ goto tlv_trunc;
+
+ ND_PRINT("\n\t O: %u, RES: %u, MTID(s): %u",
+ (GET_BE_U_2(tptr) >> 15) & 0x01,
+ (GET_BE_U_2(tptr) >> 12) & 0x07,
+ GET_BE_U_2(tptr) & 0x0fff);
+
+ tptr += 2;
+ tlen -= 2;
+
+ if (tlen)
+ isis_print_mt_capability_subtlv(ndo, tptr, tlen);
+
+ break;
+
+ case ISIS_TLV_TE_ROUTER_ID:
+ if (tlen < sizeof(nd_ipv4))
+ goto tlv_trunc;
+ ND_PRINT("\n\t Traffic Engineering Router ID: %s", GET_IPADDR_STRING(pptr));
+ break;
+
+ case ISIS_TLV_IPADDR:
+ while (tlen != 0) {
+ if (tlen < sizeof(nd_ipv4))
+ goto tlv_trunc;
+ ND_PRINT("\n\t IPv4 interface address: %s", GET_IPADDR_STRING(tptr));
+ tptr += sizeof(nd_ipv4);
+ tlen -= sizeof(nd_ipv4);
+ }
+ break;
+
+ case ISIS_TLV_HOSTNAME:
+ ND_PRINT("\n\t Hostname: ");
+ nd_printjnp(ndo, tptr, tlen);
+ break;
+
+ case ISIS_TLV_SHARED_RISK_GROUP:
+ if (tlen < NODE_ID_LEN)
+ break;
+ ND_TCHECK_LEN(tptr, NODE_ID_LEN);
+ ND_PRINT("\n\t IS Neighbor: %s", isis_print_id(ndo, tptr, NODE_ID_LEN));
+ tptr+=NODE_ID_LEN;
+ tlen-=NODE_ID_LEN;
+
+ if (tlen < 1)
+ break;
+ ND_PRINT(", Flags: [%s]",
+ ISIS_MASK_TLV_SHARED_RISK_GROUP(GET_U_1(tptr)) ? "numbered" : "unnumbered");
+ tptr++;
+ tlen--;
+
+ if (tlen < sizeof(nd_ipv4))
+ break;
+ ND_PRINT("\n\t IPv4 interface address: %s", GET_IPADDR_STRING(tptr));
+ tptr+=sizeof(nd_ipv4);
+ tlen-=sizeof(nd_ipv4);
+
+ if (tlen < sizeof(nd_ipv4))
+ break;
+ ND_PRINT("\n\t IPv4 neighbor address: %s", GET_IPADDR_STRING(tptr));
+ tptr+=sizeof(nd_ipv4);
+ tlen-=sizeof(nd_ipv4);
+
+ while (tlen != 0) {
+ if (tlen < 4)
+ goto tlv_trunc;
+ ND_PRINT("\n\t Link-ID: 0x%08x", GET_BE_U_4(tptr));
+ tptr+=4;
+ tlen-=4;
+ }
+ break;
+
+ case ISIS_TLV_LSP:
+ tlv_lsp = (const struct isis_tlv_lsp *)tptr;
+ while (tlen != 0) {
+ if (tlen < sizeof(struct isis_tlv_lsp))
+ goto tlv_trunc;
+ ND_TCHECK_1(tlv_lsp->lsp_id + LSP_ID_LEN - 1);
+ ND_PRINT("\n\t lsp-id: %s",
+ isis_print_id(ndo, tlv_lsp->lsp_id, LSP_ID_LEN));
+ ND_PRINT(", seq: 0x%08x",
+ GET_BE_U_4(tlv_lsp->sequence_number));
+ ND_PRINT(", lifetime: %5ds",
+ GET_BE_U_2(tlv_lsp->remaining_lifetime));
+ ND_PRINT(", chksum: 0x%04x", GET_BE_U_2(tlv_lsp->checksum));
+ tlen-=sizeof(struct isis_tlv_lsp);
+ tlv_lsp++;
+ }
+ break;
+
+ case ISIS_TLV_CHECKSUM:
+ if (tlen < ISIS_TLV_CHECKSUM_MINLEN)
+ break;
+ ND_TCHECK_LEN(tptr, ISIS_TLV_CHECKSUM_MINLEN);
+ ND_PRINT("\n\t checksum: 0x%04x ", GET_BE_U_2(tptr));
+ /* do not attempt to verify the checksum if it is zero
+ * most likely a HMAC-MD5 TLV is also present and
+ * to avoid conflicts the checksum TLV is zeroed.
+ * see rfc3358 for details
+ */
+ osi_print_cksum(ndo, optr, GET_BE_U_2(tptr), (int)(tptr-optr),
+ length);
+ break;
+
+ case ISIS_TLV_POI:
+ if (tlen < 1)
+ goto tlv_trunc;
+ num_system_ids = GET_U_1(tptr);
+ tptr++;
+ tlen--;
+ if (num_system_ids == 0) {
+ /* Not valid */
+ ND_PRINT(" No system IDs supplied");
+ } else {
+ if (tlen < SYSTEM_ID_LEN)
+ goto tlv_trunc;
+ ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN);
+ ND_PRINT("\n\t Purge Originator System-ID: %s",
+ isis_print_id(ndo, tptr, SYSTEM_ID_LEN));
+ tptr += SYSTEM_ID_LEN;
+ tlen -= SYSTEM_ID_LEN;
+
+ if (num_system_ids > 1) {
+ if (tlen < SYSTEM_ID_LEN)
+ goto tlv_trunc;
+ ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN);
+ ND_TCHECK_LEN(tptr, 2 * SYSTEM_ID_LEN + 1);
+ ND_PRINT("\n\t Received from System-ID: %s",
+ isis_print_id(ndo, tptr, SYSTEM_ID_LEN));
+ }
+ }
+ break;
+
+ case ISIS_TLV_MT_SUPPORTED:
+ while (tlen != 0) {
+ /* length can only be a multiple of 2, otherwise there is
+ something broken -> so decode down until length is 1 */
+ if (tlen!=1) {
+ mt_len = isis_print_mtid(ndo, tptr, "\n\t ", tlen);
+ if (mt_len == 0) /* did something go wrong ? */
+ goto trunc;
+ tptr+=mt_len;
+ tlen-=mt_len;
+ } else {
+ ND_PRINT("\n\t invalid MT-ID");
+ break;
+ }
+ }
+ break;
+
+ case ISIS_TLV_RESTART_SIGNALING:
+ /* first attempt to decode the flags */
+ if (tlen < ISIS_TLV_RESTART_SIGNALING_FLAGLEN)
+ break;
+ ND_TCHECK_LEN(tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN);
+ ND_PRINT("\n\t Flags [%s]",
+ bittok2str(isis_restart_flag_values, "none", GET_U_1(tptr)));
+ tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
+ tlen-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
+
+ /* is there anything other than the flags field? */
+ if (tlen == 0)
+ break;
+
+ if (tlen < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN)
+ break;
+ ND_TCHECK_LEN(tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN);
+
+ ND_PRINT(", Remaining holding time %us", GET_BE_U_2(tptr));
+ tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
+ tlen-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
+
+ /* is there an additional sysid field present ?*/
+ if (tlen == SYSTEM_ID_LEN) {
+ ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN);
+ ND_PRINT(", for %s", isis_print_id(ndo, tptr,SYSTEM_ID_LEN));
+ }
+ break;
+
+ case ISIS_TLV_IDRP_INFO:
+ if (tlen < 1)
+ break;
+ isis_subtlv_idrp = GET_U_1(tptr);
+ ND_PRINT("\n\t Inter-Domain Information Type: %s",
+ tok2str(isis_subtlv_idrp_values,
+ "Unknown (0x%02x)",
+ isis_subtlv_idrp));
+ tptr++;
+ tlen--;
+ switch (isis_subtlv_idrp) {
+ case ISIS_SUBTLV_IDRP_ASN:
+ if (tlen < 2)
+ goto tlv_trunc;
+ ND_PRINT("AS Number: %u", GET_BE_U_2(tptr));
+ break;
+ case ISIS_SUBTLV_IDRP_LOCAL:
+ case ISIS_SUBTLV_IDRP_RES:
+ default:
+ if (!print_unknown_data(ndo, tptr, "\n\t ", tlen))
+ return(0);
+ break;
+ }
+ break;
+
+ case ISIS_TLV_LSP_BUFFERSIZE:
+ if (tlen < 2)
+ break;
+ ND_PRINT("\n\t LSP Buffersize: %u", GET_BE_U_2(tptr));
+ break;
+
+ case ISIS_TLV_PART_DIS:
+ while (tlen != 0) {
+ if (tlen < SYSTEM_ID_LEN)
+ goto tlv_trunc;
+ ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN);
+ ND_PRINT("\n\t %s", isis_print_id(ndo, tptr, SYSTEM_ID_LEN));
+ tptr+=SYSTEM_ID_LEN;
+ tlen-=SYSTEM_ID_LEN;
+ }
+ break;
+
+ case ISIS_TLV_PREFIX_NEIGH:
+ if (tlen < sizeof(struct isis_metric_block))
+ break;
+ ND_TCHECK_LEN(tptr, sizeof(struct isis_metric_block));
+ ND_PRINT("\n\t Metric Block");
+ isis_print_metric_block(ndo, (const struct isis_metric_block *)tptr);
+ tptr+=sizeof(struct isis_metric_block);
+ tlen-=sizeof(struct isis_metric_block);
+
+ while (tlen != 0) {
+ prefix_len=GET_U_1(tptr); /* read out prefix length in semioctets*/
+ tptr++;
+ tlen--;
+ if (prefix_len < 2) {
+ ND_PRINT("\n\t\tAddress: prefix length %u < 2", prefix_len);
+ break;
+ }
+ if (tlen < prefix_len/2)
+ break;
+ ND_PRINT("\n\t\tAddress: %s/%u",
+ GET_ISONSAP_STRING(tptr, prefix_len / 2), prefix_len * 4);
+ tptr+=prefix_len/2;
+ tlen-=prefix_len/2;
+ }
+ break;
+
+ case ISIS_TLV_IIH_SEQNR:
+ if (tlen < 4)
+ break;
+ ND_PRINT("\n\t Sequence number: %u", GET_BE_U_4(tptr));
+ break;
+
+ case ISIS_TLV_ROUTER_CAPABILITY:
+ if (tlen < 5) {
+ ND_PRINT(" [object length %u < 5]", tlen);
+ nd_print_invalid(ndo);
+ break;
+ }
+ ND_PRINT("\n\t Router-ID %s", GET_IPADDR_STRING(tptr));
+ ND_PRINT(", Flags [%s]",
+ bittok2str(isis_tlv_router_capability_flags, "none", GET_U_1(tptr+4)));
+
+ /* Optional set of sub-TLV */
+ if (tlen > 5) {
+ isis_print_router_cap_subtlv(ndo, tptr+5, tlen-5);
+ }
+ break;
+
+ case ISIS_TLV_VENDOR_PRIVATE:
+ if (tlen < 3)
+ break;
+ vendor_id = GET_BE_U_3(tptr);
+ ND_PRINT("\n\t Vendor: %s (%u)",
+ tok2str(oui_values, "Unknown", vendor_id),
+ vendor_id);
+ tptr+=3;
+ tlen-=3;
+ if (tlen != 0) /* hexdump the rest */
+ if (!print_unknown_data(ndo, tptr, "\n\t\t", tlen))
+ return(0);
+ break;
+ /*
+ * FIXME those are the defined TLVs that lack a decoder
+ * you are welcome to contribute code ;-)
+ */
+
+ case ISIS_TLV_DECNET_PHASE4:
+ case ISIS_TLV_LUCENT_PRIVATE:
+ case ISIS_TLV_IPAUTH:
+ case ISIS_TLV_NORTEL_PRIVATE1:
+ case ISIS_TLV_NORTEL_PRIVATE2:
+
+ default:
+ if (ndo->ndo_vflag <= 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t\t", tlv_len))
+ return(0);
+ }
+ break;
+ }
+tlv_trunc:
+ /* do we want to see an additionally hexdump ? */
+ if (ndo->ndo_vflag> 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t ", tlv_len))
+ return(0);
+ }
+
+ pptr += tlv_len;
+ packet_len -= tlv_len;
+ }
+
+ if (packet_len != 0) {
+ ND_PRINT("\n\t %u straggler bytes", packet_len);
+ }
+ return (1);
+
+trunc:
+ nd_print_trunc(ndo);
+ return (1);
+}
+
+static void
+osi_print_cksum(netdissect_options *ndo, const uint8_t *pptr,
+ uint16_t checksum, int checksum_offset, u_int length)
+{
+ uint16_t calculated_checksum;
+
+ /* do not attempt to verify the checksum if it is zero,
+ * if the offset is nonsense,
+ * or the base pointer is not sane
+ */
+ if (!checksum
+ || checksum_offset < 0
+ || !ND_TTEST_2(pptr + checksum_offset)
+ || (u_int)checksum_offset > length
+ || !ND_TTEST_LEN(pptr, length)) {
+ ND_PRINT(" (unverified)");
+ } else {
+#if 0
+ ND_PRINT("\nosi_print_cksum: %p %d %u\n", pptr, checksum_offset, length);
+#endif
+ calculated_checksum = create_osi_cksum(pptr, checksum_offset, length);
+ if (checksum == calculated_checksum) {
+ ND_PRINT(" (correct)");
+ } else {
+ ND_PRINT(" (incorrect should be 0x%04x)", calculated_checksum);
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 22:35:31 +0000