path: root/epan/dissectors/packet-isis-lsp.c

/* packet-isis-lsp.c
 * Routines for decoding isis lsp packets and their CLVs
 *
 * Stuart Stanley <stuarts@mxmail.net>
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
/*
 * Copyright 2011, Malgi Nikitha Vivekananda <malgi.nikitha@ipinfusion.com>
 *                 Krishnamurthy Mayya <krishnamurthy.mayya@ipinfusion.com>
 *                    - Decoding for Router Capability TLV and associated subTLVs as per RFC 6326
 *                    - Decoding for Group Address TLV and associated subTLVs as per RFC 6326
 */

#include "config.h"

#include <glib.h>

#include <epan/packet.h>
#include <epan/expert.h>
#include "packet-osi.h"
#include "packet-isis.h"
#include "packet-isis-clv.h"
#include <epan/addr_resolv.h>
#include <epan/addr_and_mask.h>

/*
 * Declarations for L1/L2 LSP base header.
 */

/* P | ATT | HIPPITY | DS FIELD description */
#define ISIS_LSP_PARTITION_MASK     0x80
#define ISIS_LSP_PARTITION_SHIFT    7
#define ISIS_LSP_PARTITION(info)    (((info) & ISIS_LSP_PARTITION_MASK) >> ISIS_LSP_PARTITION_SHIFT)

#define ISIS_LSP_ATT_MASK           0x78
#define ISIS_LSP_ATT_SHIFT          3
#define ISIS_LSP_ATT(info)          (((info) & ISIS_LSP_ATT_MASK) >> ISIS_LSP_ATT_SHIFT)

#define ISIS_LSP_ATT_ERROR(info)    ((info) >> 3)
#define ISIS_LSP_ATT_EXPENSE(info)  (((info) >> 2) & 1)
#define ISIS_LSP_ATT_DELAY(info)    (((info) >> 1) & 1)
#define ISIS_LSP_ATT_DEFAULT(info)  ((info) & 1)

#define ISIS_LSP_HIPPITY_MASK       0x04
#define ISIS_LSP_HIPPITY_SHIFT      2
#define ISIS_LSP_HIPPITY(info)      (((info) & ISIS_LSP_HIPPITY_MASK) >> ISIS_LSP_HIPPITY_SHIFT)

#define ISIS_LSP_IS_TYPE_MASK       0x03
#define ISIS_LSP_IS_TYPE(info)      ((info) & ISIS_LSP_IS_TYPE_MASK)

#define ISIS_LSP_MT_MSHIP_RES_MASK  0xF000
#define ISIS_LSP_MT_MSHIP_ID_MASK   0x0FFF


#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

#define ISIS_LSP_ATTACHED_NONE      0
#define ISIS_LSP_ATTACHED_DEFAULT   1
#define ISIS_LSP_ATTACHED_DELAY     2
#define ISIS_LSP_ATTACHED_EXPENSE   4
#define ISIS_LSP_ATTACHED_ERROR     8


#define ISIS_LSP_CLV_METRIC_SUPPORTED(x)    ((x)&0x80)
#define ISIS_LSP_CLV_METRIC_IE(x)               ((x)&0x40)
#define ISIS_LSP_CLV_METRIC_RESERVED(x)        ((x)&0x40)
#define ISIS_LSP_CLV_METRIC_UPDOWN(x)           ((x)&0x80)
#define ISIS_LSP_CLV_METRIC_VALUE(x)        ((x)&0x3f)

/* Sub-TLVs under Router Capability and MT Capability TLVs
   As per RFC 7176 section 2.3
   http://www.iana.org/assignments/isis-tlv-codepoints/isis-tlv-codepoints.xhtml#isis-tlv-codepoints-242
 */
#define ISIS_TE_NODE_CAP_DESC     1
#define NICKNAME                  6
#define TREES                     7
#define TREE_IDENTIFIER           8
#define TREES_USED_IDENTIFIER     9
#define INTERESTED_VLANS         10
#define TRILL_VERSION            13
#define VLAN_GROUP               14


/*Sub-TLVs under Group Address TLV*/
#define GRP_MAC_ADDRESS 1
#define GRP_IPV4_ADDRESS 2
#define GRP_IPV6_ADDRESS 3

const range_string mtid_strings[] = {
  {    0,    0, "Standard topology" },
  {    1,    1, "IPv4 In-Band Management" },
  {    2,    2, "IPv6 routing topology" },
  {    3,    3, "IPv4 multicast routing topology" },
  {    4,    4, "IPv6 multicast routing topology" },
  {    5,    5, "IPv6 in-band management" },
  {    6, 3995, "Reserved for IETF Consensus" },
  { 3996, 4095, "Development, Experimental and Proprietary features" },
  {    0,    0, NULL }
} ;

void proto_register_isis_lsp(void);
void proto_reg_handoff_isis_lsp(void);

static int proto_isis_lsp = -1;

/* lsp packets */
static int hf_isis_lsp_pdu_length = -1;
static int hf_isis_lsp_remaining_life = -1;
static int hf_isis_lsp_sequence_number = -1;
static int hf_isis_lsp_lsp_id = -1;
static int hf_isis_lsp_hostname = -1;
static int hf_isis_lsp_checksum = -1;
static int hf_isis_lsp_checksum_bad = -1;
static int hf_isis_lsp_checksum_good = -1;
static int hf_isis_lsp_clv_ipv4_int_addr = -1;
static int hf_isis_lsp_clv_ipv6_int_addr = -1;
static int hf_isis_lsp_clv_te_router_id = -1;
static int hf_isis_lsp_clv_mt = -1;
static int hf_isis_lsp_p = -1;
static int hf_isis_lsp_att = -1;
static int hf_isis_lsp_hippity = -1;
static int hf_isis_lsp_is_type = -1;
static int hf_isis_lsp_clv_type = -1;
static int hf_isis_lsp_clv_length = -1;
static int hf_isis_lsp_root_id = -1;
static int hf_isis_lsp_spb_link_metric = -1;
static int hf_isis_lsp_spb_port_count = -1;
static int hf_isis_lsp_spb_port_id = -1;
static int hf_isis_lsp_spb_sr_bit = -1;
static int hf_isis_lsp_spb_spvid = -1;
/* Generated from convert_proto_tree_add_text.pl */
static int hf_isis_lsp_grp_macaddr_length = -1;
static int hf_isis_lsp_grp_ipv4addr_length = -1;
static int hf_isis_lsp_grp_ipv6addr_length = -1;
static int hf_isis_lsp_mt_cap_spb_instance_v = -1;
static int hf_isis_lsp_mt_cap_spb_instance_cist_external_root_path_cost = -1;
static int hf_isis_lsp_rt_capable_tree_used_id_starting_tree_no = -1;
static int hf_isis_lsp_mt_cap_spb_instance_bridge_priority = -1;
static int hf_isis_lsp_mt_cap_spbm_service_identifier_base_vid = -1;
static int hf_isis_lsp_64_bit_administrative_tag = -1;
static int hf_isis_lsp_grp_macaddr_number_of_sources = -1;
static int hf_isis_lsp_grp_ipv4addr_number_of_sources = -1;
static int hf_isis_lsp_grp_ipv6addr_number_of_sources = -1;
static int hf_isis_lsp_ext_is_reachability_traffic_engineering_default_metric = -1;
static int hf_isis_lsp_grp_macaddr_group_address = -1;
static int hf_isis_lsp_grp_ipv4addr_group_address = -1;
static int hf_isis_lsp_grp_ipv6addr_group_address = -1;
static int hf_isis_lsp_rt_capable_tree_root_id_nickname = -1;
static int hf_isis_lsp_ext_is_reachability_ipv4_interface_address = -1;
static int hf_isis_lsp_ext_ip_reachability_metric = -1;
static int hf_isis_lsp_ext_ip_reachability_ipv4_prefix = -1;
static int hf_isis_lsp_eis_neighbors_es_neighbor_id = -1;
static int hf_isis_lsp_expense_metric = -1;
static int hf_isis_lsp_ext_is_reachability_link_remote_identifier = -1;
static int hf_isis_lsp_rt_capable_vlan_group_secondary_vlan_id = -1;
static int hf_isis_lsp_grp_macaddr_vlan_id = -1;
static int hf_isis_lsp_grp_ipv4addr_vlan_id = -1;
static int hf_isis_lsp_grp_ipv6addr_vlan_id = -1;
static int hf_isis_lsp_rt_capable_trill_affinity_tlv = -1;
static int hf_isis_lsp_rt_capable_trill_fgl_safe = -1;
static int hf_isis_lsp_rt_capable_trill_caps = -1;
static int hf_isis_lsp_rt_capable_trill_flags = -1;
static int hf_isis_lsp_rt_capable_tree_root_id_starting_tree_no = -1;
static int hf_isis_lsp_rt_capable_interested_vlans_nickname = -1;
static int hf_isis_lsp_ip_reachability_ipv4_prefix = -1;
static int hf_isis_lsp_grp_macaddr_topology_id = -1;
static int hf_isis_lsp_grp_ipv4addr_topology_id = -1;
static int hf_isis_lsp_grp_ipv6addr_topology_id = -1;
static int hf_isis_lsp_ext_is_reachability_ipv4_neighbor_address = -1;
static int hf_isis_lsp_ipv6_reachability_reserved_bits = -1;
static int hf_isis_lsp_eis_neighbors_default_metric = -1;
static int hf_isis_lsp_mt_cap_spb_instance_cist_root_identifier = -1;
static int hf_isis_lsp_rt_capable_tree_used_id_nickname = -1;
static int hf_isis_lsp_grp_macaddr_source_address = -1;
static int hf_isis_lsp_grp_ipv4addr_source_address = -1;
static int hf_isis_lsp_grp_ipv6addr_source_address = -1;
static int hf_isis_lsp_delay_metric = -1;
static int hf_isis_lsp_ext_is_reachability_link_local_identifier = -1;
static int hf_isis_lsp_mt_cap_mtid = -1;
static int hf_isis_lsp_32_bit_administrative_tag = -1;
static int hf_isis_lsp_ext_is_reachability_is_neighbor_id = -1;
static int hf_isis_lsp_reservable_link_bandwidth = -1;
static int hf_isis_lsp_rt_capable_vlan_group_primary_vlan_id = -1;
static int hf_isis_lsp_rt_capable_interested_vlans_multicast_ipv4 = -1;
static int hf_isis_lsp_rt_capable_interested_vlans_multicast_ipv6 = -1;
static int hf_isis_lsp_mt_cap_spb_instance_number_of_trees = -1;
static int hf_isis_lsp_mt_cap_spbm_service_identifier_b_mac = -1;
static int hf_isis_lsp_ipv6_reachability_distribution = -1;
static int hf_isis_lsp_ipv6_reachability_distribution_internal = -1;
static int hf_isis_lsp_ipv6_reachability_metric = -1;
static int hf_isis_lsp_rt_capable_trees_maximum_nof_trees_to_compute = -1;
static int hf_isis_lsp_rt_capable_interested_vlans_vlan_start_id = -1;
static int hf_isis_lsp_rt_capable_nickname_nickname_priority = -1;
static int hf_isis_lsp_ext_is_reachability_metric = -1;
static int hf_isis_lsp_default_metric = -1;
static int hf_isis_lsp_ext_ip_reachability_distribution = -1;
static int hf_isis_lsp_maximum_link_bandwidth = -1;
static int hf_isis_lsp_rt_capable_nickname_tree_root_priority = -1;
static int hf_isis_lsp_eis_neighbors_delay_metric = -1;
static int hf_isis_lsp_rt_capable_trill_maximum_version = -1;
static int hf_isis_lsp_rt_capable_interested_vlans_afs_lost_counter = -1;
static int hf_isis_lsp_ipv6_reachability_ipv6_prefix = -1;
static int hf_isis_lsp_eis_neighbors_error_metric = -1;
static int hf_isis_lsp_rt_capable_interested_vlans_vlan_end_id = -1;
static int hf_isis_lsp_error_metric = -1;
static int hf_isis_lsp_grp_macaddr_number_of_records = -1;
static int hf_isis_lsp_grp_ipv4addr_number_of_records = -1;
static int hf_isis_lsp_grp_ipv6addr_number_of_records = -1;
static int hf_isis_lsp_rt_capable_nickname_nickname = -1;
static int hf_isis_lsp_mt_id_reserved = -1;
static int hf_isis_lsp_eis_neighbors_is_neighbor_id = -1;
static int hf_isis_lsp_mt_id = -1;
static int hf_isis_lsp_eis_neighbors_reserved = -1;
static int hf_isis_lsp_ip_reachability_error_metric = -1;
static int hf_isis_lsp_ip_reachability_delay_metric = -1;
static int hf_isis_lsp_ip_reachability_expense_metric = -1;
static int hf_isis_lsp_rt_capable_trees_nof_trees_to_use = -1;
static int hf_isis_lsp_ip_reachability_default_metric = -1;
static int hf_isis_lsp_rt_capable_trees_nof_trees_to_compute = -1;
static int hf_isis_lsp_eis_neighbors_expense_metric = -1;
static int hf_isis_lsp_partition_designated_l2_is = -1;
static int hf_isis_lsp_originating_lsp_buffer_size = -1;
static int hf_isis_lsp_ip_reachability_default_metric_ie = -1;
static int hf_isis_lsp_eis_neighbors_default_metric_ie = -1;
static int hf_isis_lsp_eis_neighbors_error_metric_supported = -1;
static int hf_isis_lsp_unrsv_bw_priority_level = -1;
static int hf_isis_lsp_ip_reachability_expense_metric_support = -1;
static int hf_isis_lsp_mt_cap_overload = -1;
static int hf_isis_lsp_eis_neighbors_expense_metric_supported = -1;
static int hf_isis_lsp_ip_reachability_delay_metric_support = -1;
static int hf_isis_lsp_ip_reachability_error_metric_support = -1;
static int hf_isis_lsp_mt_cap_spsourceid = -1;
static int hf_isis_lsp_eis_neighbors_delay_metric_supported = -1;
static int hf_isis_lsp_eis_neighbors_error_metric_ie = -1;
static int hf_isis_lsp_eis_neighbors_expense_metric_ie = -1;
static int hf_isis_lsp_eis_neighbors_delay_metric_ie = -1;
static int hf_isis_lsp_ip_reachability_delay_metric_ie = -1;
static int hf_isis_lsp_ip_reachability_distribution = -1;
static int hf_isis_lsp_ip_reachability_error_metric_ie = -1;
static int hf_isis_lsp_ip_reachability_expense_metric_ie = -1;
static int hf_isis_lsp_rt_capable_router_id =-1;
static int hf_isis_lsp_rt_capable_flag_s =-1;
static int hf_isis_lsp_rt_capable_flag_d =-1;
static int hf_isis_lsp_clv_te_node_cap_b_bit = -1;
static int hf_isis_lsp_clv_te_node_cap_e_bit = -1;
static int hf_isis_lsp_clv_te_node_cap_m_bit = -1;
static int hf_isis_lsp_clv_te_node_cap_g_bit = -1;
static int hf_isis_lsp_clv_te_node_cap_p_bit = -1;
static int hf_isis_lsp_area_address = -1;
static int hf_isis_lsp_clv_nlpid = -1;
static int hf_isis_lsp_ip_authentication = -1;
static int hf_isis_lsp_authentication = -1;

static gint ett_isis_lsp = -1;
static gint ett_isis_lsp_info = -1;
static gint ett_isis_lsp_att = -1;
static gint ett_isis_lsp_cksum = -1;
static gint ett_isis_lsp_clv_area_addr = -1;
static gint ett_isis_lsp_clv_is_neighbors = -1;
static gint ett_isis_lsp_clv_ext_is_reachability = -1; /* CLV 22 */
static gint ett_isis_lsp_part_of_clv_ext_is_reachability = -1;
static gint ett_isis_lsp_subclv_admin_group = -1;
static gint ett_isis_lsp_subclv_unrsv_bw = -1;
static gint ett_isis_lsp_subclv_spb_link_metric = -1;
static gint ett_isis_lsp_clv_unknown = -1;
static gint ett_isis_lsp_clv_partition_dis = -1;
static gint ett_isis_lsp_clv_prefix_neighbors = -1;
static gint ett_isis_lsp_clv_nlpid = -1;
static gint ett_isis_lsp_clv_hostname = -1;
static gint ett_isis_lsp_clv_te_router_id = -1;
static gint ett_isis_lsp_clv_authentication = -1;
static gint ett_isis_lsp_clv_ip_authentication = -1;
static gint ett_isis_lsp_clv_ipv4_int_addr = -1;
static gint ett_isis_lsp_clv_ipv6_int_addr = -1; /* CLV 232 */
static gint ett_isis_lsp_clv_mt_cap = -1;
static gint ett_isis_lsp_clv_mt_cap_spb_instance = -1;
static gint ett_isis_lsp_clv_mt_cap_spbm_service_identifier = -1;
static gint ett_isis_lsp_clv_mt_cap_spbv_mac_address = -1;
static gint ett_isis_lsp_clv_ip_reachability = -1;
static gint ett_isis_lsp_clv_ip_reach_subclv = -1;
static gint ett_isis_lsp_clv_ext_ip_reachability = -1; /* CLV 135 */
static gint ett_isis_lsp_part_of_clv_ext_ip_reachability = -1;
static gint ett_isis_lsp_clv_ipv6_reachability = -1; /* CLV 236 */
static gint ett_isis_lsp_part_of_clv_ipv6_reachability = -1;
static gint ett_isis_lsp_clv_mt = -1;
static gint ett_isis_lsp_clv_mt_is = -1;
static gint ett_isis_lsp_part_of_clv_mt_is = -1;
static gint ett_isis_lsp_clv_mt_reachable_IPv4_prefx = -1;  /* CLV 235 */
static gint ett_isis_lsp_clv_mt_reachable_IPv6_prefx = -1;  /* CLV 237 */
static gint ett_isis_lsp_clv_rt_capable = -1;   /* CLV 242 */
static gint ett_isis_lsp_clv_te_node_cap_desc = -1;
static gint ett_isis_lsp_clv_trill_version = -1;
static gint ett_isis_lsp_clv_trees = -1;
static gint ett_isis_lsp_clv_root_id = -1;
static gint ett_isis_lsp_clv_nickname = -1;
static gint ett_isis_lsp_clv_interested_vlans = -1;
static gint ett_isis_lsp_clv_tree_used = -1;
static gint ett_isis_lsp_clv_vlan_group = -1;
static gint ett_isis_lsp_clv_grp_address = -1;  /* CLV 142 */
static gint ett_isis_lsp_clv_grp_macaddr = -1;
static gint ett_isis_lsp_clv_grp_ipv4addr = -1;
static gint ett_isis_lsp_clv_grp_ipv6addr = -1;
static gint ett_isis_lsp_clv_originating_buff_size = -1; /* CLV 14 */

static expert_field ie_isis_lsp_checksum_bad = EI_INIT;
static expert_field ei_isis_lsp_short_packet = EI_INIT;
static expert_field ei_isis_lsp_long_packet = EI_INIT;
static expert_field ei_isis_lsp_subtlv = EI_INIT;
static expert_field ei_isis_lsp_authentication = EI_INIT;
static expert_field ei_isis_lsp_clv_mt = EI_INIT;


static const value_string isis_lsp_istype_vals[] = {
    { ISIS_LSP_TYPE_UNUSED0,    "Unused 0x0 (invalid)"},
    { ISIS_LSP_TYPE_LEVEL_1,    "Level 1"},
    { ISIS_LSP_TYPE_UNUSED2,    "Unused 0x2 (invalid)"},
    { ISIS_LSP_TYPE_LEVEL_2,    "Level 2"},
    { 0, NULL } };

static const true_false_string tfs_up_down = { "Up", "Down" };
static const true_false_string tfs_notsupported_supported = { "Not Supported", "Supported" };
static const true_false_string tfs_internal_external = { "Internal", "External" };
static const true_false_string tfs_external_internal = { "External", "Internal" };

/*
 * Name: dissect_lsp_mt_id()
 *
 * Description:
 *    dissect and display the multi-topology ID value
 *
 * Input:
 *    tvbuff_t * : tvbuffer for packet data
 *    proto_tree * : protocol display tree to fill out.  CAN'T BE NULL
 *    int : offset into packet data where we are.
 *
 * Output:
 *    void, but we will add to proto tree.
 */
static void
dissect_lsp_mt_id(tvbuff_t *tvb, proto_tree *tree, int offset)
{

    proto_tree_add_item(tree, hf_isis_lsp_mt_id_reserved, tvb, offset, 2, ENC_BIG_ENDIAN);

    proto_tree_add_item(tree, hf_isis_lsp_mt_id, tvb, offset, 2, ENC_BIG_ENDIAN);

}

/*
 * Name: dissect_metric()
 *
 * Description:
 *    Display a metric prefix portion.  ISIS has the concept of multple
 *    metric per prefix (default, delay, expense, and error).  This
 *    routine assists other dissectors by adding a single one of
 *    these to the display tree..
 *
 *    The 8th(msbit) bit in the metric octet is the "supported" bit.  The
 *        "default" support is required, so we support a "force_supported"
 *        flag that tells us that it MUST be zero (zero==supported,
 *        so it really should be a "not supported" in the boolean sense)
 *        and to display a protocol failure accordingly.  Notably,
 *        Cisco IOS 12(6) blows this!
 *    The 7th bit must be zero (reserved).
 *
 * Input:
 *    tvbuff_t * : tvbuffer for packet data
 *    proto_tree * : protocol display tree to fill out.  May be NULL
 *    int : offset into packet data where we are.
 *    guint8 : value of the metric.
 *    char * : string giving type of the metric.
 *    int : force supported.  True is the supported bit MUST be zero.
 *
 * Output:
 *    void, but we will add to proto tree if !NULL.
 */
static void
dissect_metric(tvbuff_t *tvb, proto_tree *tree,    int offset, guint8 value,
    const char *pstr, int force_supported )
{
    int s;

    if ( !tree ) return;

    s = ISIS_LSP_CLV_METRIC_SUPPORTED(value);
    proto_tree_add_text(tree, tvb, offset, 1,
        "%s Metric: %s%s %s%d:%d", pstr,
        s ? "Not supported" : "Supported",
        (s && force_supported) ? "(but is required to be)":"",
        ISIS_LSP_CLV_METRIC_RESERVED(value) ? "(reserved bit != 0)":"",
        ISIS_LSP_CLV_METRIC_VALUE(value), value );
}

/*
 * Name: dissect_lsp_ip_reachability_clv()
 *
 * Description:
 *    Decode an IP reachability CLV.  This can be either internal or
 *    external (the clv format does not change and which type we are
 *    displaying is put there by the dispatcher).  All of these
 *    are a metric block followed by an IP addr and mask.
 *
 * Input:
 *    tvbuff_t * : tvbuffer for packet data
 *    proto_tree * : proto tree to build on (may be null)
 *    int : current offset into packet data
 *    int : length of IDs in packet.
 *    int : length of this clv
 *
 * Output:
 *    void, will modify proto_tree if not null.
 */
static void
dissect_lsp_ip_reachability_clv(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree, int offset,
    int id_length _U_, int length)
{
    proto_item     *ti;
    proto_tree    *ntree = NULL;
    guint32        src, mask, bitmask;
    int        prefix_len;
    gboolean    found_mask = FALSE;

    while ( length > 0 ) {
        if (length<12) {
            proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                "short IP reachability (%d vs 12)", length );
            return;
        }
        /*
         * Gotta build a sub-tree for all our pieces
         */
        if ( tree ) {
            src = tvb_get_ipv4(tvb, offset+4);
            mask = tvb_get_ntohl(tvb, offset+8);

            /* find out if the mask matches one of 33 possible prefix lengths */
            bitmask = 0xffffffff;
            for(prefix_len = 32; prefix_len >= 0; prefix_len--) {
                if (bitmask==mask) {
                    found_mask = TRUE;
                    break;
                }
                bitmask = bitmask << 1;
            }

            /* If we have a discontiguous netmask, dump the mask, otherwise print the prefix_len */
            /* XXX - We should probably have some sort of netmask_to_str() routine in to_str.c that does this. */

            if(found_mask) {
              ti = proto_tree_add_ipv4_format_value( tree, hf_isis_lsp_ip_reachability_ipv4_prefix, tvb, offset, 12,
                src, "%s/%d", ip_to_str((guint8*)&src), prefix_len );
            } else {
              ti = proto_tree_add_ipv4_format_value( tree, hf_isis_lsp_ip_reachability_ipv4_prefix, tvb, offset, 12,
                src, "%s mask %s", ip_to_str((guint8*)&src), tvb_ip_to_str(tvb, offset+8));
            };

            ntree = proto_item_add_subtree(ti, ett_isis_lsp_clv_ip_reachability);

            proto_tree_add_item(ntree, hf_isis_lsp_ip_reachability_default_metric, tvb, offset, 1, ENC_BIG_ENDIAN);
            proto_tree_add_item(ntree, hf_isis_lsp_ip_reachability_default_metric_ie, tvb, offset, 1, ENC_NA);
            proto_tree_add_item(ntree, hf_isis_lsp_ip_reachability_distribution, tvb, offset, 1, ENC_NA);

            proto_tree_add_item(ntree, hf_isis_lsp_ip_reachability_delay_metric, tvb, offset+1, 1, ENC_BIG_ENDIAN);
            proto_tree_add_item(ntree, hf_isis_lsp_ip_reachability_delay_metric_support, tvb, offset+1, 1, ENC_NA);
            proto_tree_add_item(ntree, hf_isis_lsp_ip_reachability_delay_metric_ie, tvb, offset+1, 1, ENC_NA);

            proto_tree_add_item(ntree, hf_isis_lsp_ip_reachability_expense_metric, tvb, offset+2, 1, ENC_BIG_ENDIAN);
            proto_tree_add_item(ntree, hf_isis_lsp_ip_reachability_expense_metric_support, tvb, offset+2, 1, ENC_NA);
            proto_tree_add_item(ntree, hf_isis_lsp_ip_reachability_expense_metric_ie, tvb, offset+2, 1, ENC_NA);

            proto_tree_add_item(ntree, hf_isis_lsp_ip_reachability_error_metric, tvb, offset+3, 1, ENC_BIG_ENDIAN);
            proto_tree_add_item(ntree, hf_isis_lsp_ip_reachability_error_metric_support, tvb, offset+3, 1, ENC_NA);
            proto_tree_add_item(ntree, hf_isis_lsp_ip_reachability_error_metric_ie, tvb, offset+3, 1, ENC_NA);
        }
        offset += 12;
        length -= 12;
    }
}

/*
 * Name: dissect_ipreach_subclv ()
 *
 * Description: parses IP reach subTLVs
 *              Called by various IP Reachability dissectors.
 *
 * Input:
 *   tvbuff_t * : tvbuffer for packet data
 *   proto_tree * : protocol display tree to fill out.
 *   int : offset into packet data where we are (beginning of the sub_clv value).
 *
 * Output:
 *   void
 */
static void
dissect_ipreach_subclv(tvbuff_t *tvb, proto_tree *tree, int offset, int clv_code, int clv_len)
{

    switch (clv_code) {
    case 1:
        while (clv_len >= 4) {
            proto_tree_add_item(tree, hf_isis_lsp_32_bit_administrative_tag, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset+=4;
            clv_len-=4;
        }
        break;
    case 2:
        while (clv_len >= 8) {
            proto_tree_add_item(tree, hf_isis_lsp_64_bit_administrative_tag, tvb, offset, 8, ENC_BIG_ENDIAN);
            offset+=8;
            clv_len-=8;
        }
        break;

        default :
            proto_tree_add_text (tree, tvb, offset, clv_len+2,
                                 "Unknown Sub-TLV: code %u, length %u",
                                 clv_code, clv_len );
            break;
    }
}


/*
 * Name: dissect_lsp_ext_ip_reachability_clv()
 *
 * Description: Decode an Extended IP Reachability CLV - code 135.
 *
 *   The extended IP reachability TLV is an extended version
 *   of the IP reachability TLVs (codes 128 and 130). It encodes
 *   the metric as a 32-bit unsigned interger and allows to add
 *   sub-CLV(s).
 *
 *   CALLED BY TLV 235 DISSECTOR
 *
 *
 * Input:
 *   tvbuff_t * : tvbuffer for packet data
 *   proto_tree * : proto tree to build on (may be null)
 *   int : current offset into packet data
 *   int : length of IDs in packet.
 *   int : length of this clv
 *
 * Output:
 *   void, will modify proto_tree if not null.
 */
static void
dissect_lsp_ext_ip_reachability_clv(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree,
    int offset, int id_length _U_, int length)
{
    proto_tree *subtree = NULL;
    proto_tree *subtree2 = NULL;
    guint8     ctrl_info;
    guint      bit_length;
    int        byte_length;
    guint8     prefix [4];
    guint      len,i;
    guint      subclvs_len;
    guint      clv_code, clv_len;

    if (!tree) return;

    while (length > 0) {
        ctrl_info = tvb_get_guint8(tvb, offset+4);
        bit_length = ctrl_info & 0x3f;
        byte_length = ipv4_addr_and_mask(tvb, offset+5, prefix, bit_length);
        if (byte_length == -1) {
            proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                 "IPv4 prefix has an invalid length: %d bits", bit_length );
                return;
            }
        subclvs_len = 0;
        if ((ctrl_info & 0x40) != 0)
            subclvs_len = 1+tvb_get_guint8(tvb, offset+5+byte_length);

        /* open up a new tree per prefix */
        subtree = proto_tree_add_subtree(tree, tvb, offset, 5+byte_length+subclvs_len,
                            ett_isis_lsp_part_of_clv_ext_ip_reachability, NULL, "Ext. IP Reachability");

        proto_tree_add_ipv4_format_value(subtree, hf_isis_lsp_ext_ip_reachability_ipv4_prefix, tvb, offset+5, byte_length,
                             tvb_get_ntohl(tvb, offset+5), "%s/%u", ip_to_str (prefix), bit_length);
        proto_tree_add_item(subtree, hf_isis_lsp_ext_ip_reachability_metric, tvb, offset, 4, ENC_BIG_ENDIAN);
        proto_tree_add_item(subtree, hf_isis_lsp_ext_ip_reachability_distribution, tvb, offset+4, 1, ENC_NA);

        len = 5 + byte_length;
        if ((ctrl_info & 0x40) != 0) {
            subclvs_len = tvb_get_guint8(tvb, offset+len);
            subtree2 = proto_tree_add_subtree_format(subtree, tvb, offset+len, subclvs_len+1,
                                      ett_isis_lsp_clv_ip_reach_subclv, NULL,
                                      "sub-TLVs present, total length: %u bytes", subclvs_len);
            i =0;
            while (i < subclvs_len) {
                clv_code = tvb_get_guint8(tvb, offset+len+1); /* skip the total subtlv len indicator */
                clv_len  = tvb_get_guint8(tvb, offset+len+2);

                /*
                 * we pass on now the raw data to the ipreach_subtlv dissector
                 * therefore we need to skip 3 bytes
                 * (total subtlv len, subtlv type, subtlv len)
                 */
                dissect_ipreach_subclv(tvb, subtree2, offset+len+3, clv_code, clv_len);
                i += clv_len + 2;
            }
            len += 1 + subclvs_len;
        } else {
            proto_tree_add_text (subtree, tvb, offset+4, len, "no sub-TLVs present");
        }

        offset += len;
        length -= len;
    }
}

/*
 * Name: dissect_isis_grp_address_clv()
 *
 * Description: Decode GROUP ADDRESS subTLVs
 *              The  Group Address  TLV is composed of 1 octet for the type,
 *              1 octet that specifies the number of bytes in the value field, and a
 *              Variable length value field that can have any or all of the subTLVs that are listed in the
 *              - below section
 *
 *Input:
 *   tvbuff_t * : tvbuffer for packet data
 *   proto_tree * : proto tree to build on (may be null)
 *   int : current offset into packet data
 *   int : length of IDs in packet.
 *   int : length of this clv
 *
 * Output:
 *   void, will modify proto_tree if not null.
 */

static void
dissect_isis_grp_address_clv(tvbuff_t *tvb, packet_info* pinfo _U_, proto_tree *tree, int offset,
    int tree_id,int length)
{
    gint len;
    gint source_num;
    guint16 mt_block;

    proto_tree *rt_tree=NULL;

    while (length>0) {
        /* fetch two bytes */
        mt_block=tvb_get_ntohs(tvb, offset);
        /* Mask out the lower 8 bits */
        switch((mt_block&0xff00)>>8) {


            case GRP_MAC_ADDRESS:
                rt_tree = proto_tree_add_subtree(tree, tvb, offset, (mt_block&0x00ff)+2,
                    ett_isis_lsp_clv_grp_macaddr, NULL, "Group MAC Address Sub-TLV");

                length--;
                offset++;

                len=tvb_get_guint8(tvb, offset);/* 1 byte fetched displays the length*/
                proto_tree_add_item(rt_tree, hf_isis_lsp_grp_macaddr_length, tvb, offset, 1, ENC_BIG_ENDIAN);

                if(len < 5) {
                    length -= len;
                    offset += len;
                    break;
                }

                length--;
                offset++;

                proto_tree_add_item(rt_tree, hf_isis_lsp_grp_macaddr_topology_id, tvb, offset, 2, ENC_BIG_ENDIAN);

                length -= 2;
                offset += 2;
                len -= 2;

                proto_tree_add_item(rt_tree, hf_isis_lsp_grp_macaddr_vlan_id, tvb, offset, 2, ENC_BIG_ENDIAN);

                length -= 2;
                offset += 2;
                len -= 2;

                proto_tree_add_item(rt_tree, hf_isis_lsp_grp_macaddr_number_of_records, tvb, offset, 1, ENC_BIG_ENDIAN);

                length--;
                offset++;
                len--;

                while(len > 0) {

                    source_num=tvb_get_guint8(tvb, offset);
                    proto_tree_add_item(rt_tree, hf_isis_lsp_grp_macaddr_number_of_sources, tvb, offset, 1, ENC_BIG_ENDIAN);

                    length--;
                    offset++;
                    len--;

                    proto_tree_add_item(rt_tree, hf_isis_lsp_grp_macaddr_group_address, tvb, offset, 6, ENC_NA);

                    length -= 6;
                    offset += 6;
                    len -= 6;


                    while((len > 0) && (source_num > 0)) {
                        proto_tree_add_item(rt_tree, hf_isis_lsp_grp_macaddr_source_address, tvb, offset, 6, ENC_NA);

                        length -= 6;
                        offset += 6;
                        len -= 6;
                        source_num--;
                    }
                }

                break;

            case GRP_IPV4_ADDRESS:
                rt_tree = proto_tree_add_subtree(tree, tvb, offset, (mt_block&0x00ff)+2,
                    ett_isis_lsp_clv_grp_ipv4addr, NULL, "Group IPv4 Address Sub-TLV");

                length--;
                offset++;

                len=tvb_get_guint8(tvb, offset);/* 1 byte fetched displays the length*/
                proto_tree_add_item(rt_tree, hf_isis_lsp_grp_ipv4addr_length, tvb, offset, 1, ENC_BIG_ENDIAN);

                if(len < 5) {
                    length -= len;
                    offset += len;
                    break;
                }

                length--;
                offset++;

                proto_tree_add_item(rt_tree, hf_isis_lsp_grp_ipv4addr_topology_id, tvb, offset, 2, ENC_BIG_ENDIAN);

                length -= 2;
                offset += 2;
                len -= 2;

                proto_tree_add_item(rt_tree, hf_isis_lsp_grp_ipv4addr_vlan_id, tvb, offset, 2, ENC_BIG_ENDIAN);

                length -= 2;
                offset += 2;
                len -= 2;

                proto_tree_add_item(rt_tree, hf_isis_lsp_grp_ipv4addr_number_of_records, tvb, offset, 1, ENC_BIG_ENDIAN);

                length--;
                offset++;
                len--;

                while(len > 0) {

                    source_num=tvb_get_guint8(tvb, offset);
                    proto_tree_add_item(rt_tree, hf_isis_lsp_grp_ipv4addr_number_of_sources, tvb, offset, 1, ENC_BIG_ENDIAN);

                    length--;
                    offset++;
                    len--;

                    proto_tree_add_item(rt_tree, hf_isis_lsp_grp_ipv4addr_group_address, tvb, offset, 4, ENC_BIG_ENDIAN);

                    length -= 4;
                    offset += 4;
                    len -= 4;


                    while((len > 0) && (source_num > 0)) {
                        proto_tree_add_item(rt_tree, hf_isis_lsp_grp_ipv4addr_source_address, tvb, offset, 4, ENC_BIG_ENDIAN);

                        length -= 4;
                        offset += 4;
                        len -= 4;
                        source_num--;
                    }
                }

                break;

            case GRP_IPV6_ADDRESS:
                rt_tree = proto_tree_add_subtree(tree, tvb, offset, (mt_block&0x00ff)+2,
                    ett_isis_lsp_clv_grp_ipv6addr, NULL, "Group IPv6 Address Sub-TLV");

                length--;
                offset++;

                len=tvb_get_guint8(tvb, offset);/* 1 byte fetched displays the length*/
                proto_tree_add_item(rt_tree, hf_isis_lsp_grp_ipv6addr_length, tvb, offset, 1, ENC_BIG_ENDIAN);

                if(len < 5) {
                    length -= len;
                    offset += len;
                    break;
                }

                length--;
                offset++;

                proto_tree_add_item(rt_tree, hf_isis_lsp_grp_ipv6addr_topology_id, tvb, offset, 2, ENC_BIG_ENDIAN);

                length -= 2;
                offset += 2;
                len -= 2;

                proto_tree_add_item(rt_tree, hf_isis_lsp_grp_ipv6addr_vlan_id, tvb, offset, 2, ENC_BIG_ENDIAN);

                length -= 2;
                offset += 2;
                len -= 2;

                proto_tree_add_item(rt_tree, hf_isis_lsp_grp_ipv6addr_number_of_records, tvb, offset, 1, ENC_BIG_ENDIAN);

                length--;
                offset++;
                len--;

                while(len > 0) {

                    source_num=tvb_get_guint8(tvb, offset);
                    proto_tree_add_item(rt_tree, hf_isis_lsp_grp_ipv6addr_number_of_sources, tvb, offset, 1, ENC_BIG_ENDIAN);

                    length--;
                    offset++;
                    len--;

                    proto_tree_add_item(rt_tree, hf_isis_lsp_grp_ipv6addr_group_address, tvb, offset, 16, ENC_NA);

                    length -= 16;
                    offset += 16;
                    len -= 16;


                    while((len > 0) && (source_num > 0)) {
                        proto_tree_add_item(rt_tree, hf_isis_lsp_grp_ipv6addr_source_address, tvb, offset, 16, ENC_NA);

                        length -= 16;
                        offset += 16;
                        len -= 16;
                        source_num--;
                    }
                }

                break;

            default:
                proto_tree_add_uint_format ( tree, tree_id, tvb, offset,(mt_block&0x00ff)+2,
                        mt_block, "Unknown Sub-TLV");
                offset++;
                length -= (2+tvb_get_guint8(tvb, offset));
                offset += (1+tvb_get_guint8(tvb, offset));
                break;
        }
    }
}

static int
dissect_isis_trill_clv(tvbuff_t *tvb, packet_info* pinfo _U_,
        proto_tree *tree, int offset, int subtype, int sublen)
{
    guint16 rt_block;
    proto_tree *rt_tree, *cap_tree;

    guint16 root_id;

    switch (subtype) {

    case ISIS_TE_NODE_CAP_DESC:
        /* 1 TE Node Capability Descriptor [RFC5073] */
        cap_tree = proto_tree_add_subtree(tree, tvb, offset-2, sublen+2,
            ett_isis_lsp_clv_te_node_cap_desc, NULL, "TE Node Capability Descriptor");
        /*
         *    0        B bit: P2MP Branch LSR capability       [RFC5073]
         *    1        E bit: P2MP Bud LSR capability          [RFC5073]
         *    2        M bit: MPLS-TE support                  [RFC5073]
         *    3        G bit: GMPLS support                    [RFC5073]
         *    4        P bit: P2MP RSVP-TE support             [RFC5073]
         *    5-7      Unassigned                              [RFC5073]
         */

        proto_tree_add_item(cap_tree, hf_isis_lsp_clv_te_node_cap_b_bit, tvb, offset, 1, ENC_NA);
        proto_tree_add_item(cap_tree, hf_isis_lsp_clv_te_node_cap_e_bit, tvb, offset, 1, ENC_NA);
        proto_tree_add_item(cap_tree, hf_isis_lsp_clv_te_node_cap_m_bit, tvb, offset, 1, ENC_NA);
        proto_tree_add_item(cap_tree, hf_isis_lsp_clv_te_node_cap_g_bit, tvb, offset, 1, ENC_NA);
        proto_tree_add_item(cap_tree, hf_isis_lsp_clv_te_node_cap_p_bit, tvb, offset, 1, ENC_NA);
        return(0);
    case TRILL_VERSION:
        rt_tree = proto_tree_add_subtree_format(tree, tvb, offset-2, sublen+2,
                    ett_isis_lsp_clv_trill_version, NULL, "TRILL version (t=%u, l=%u)", subtype, sublen);

        proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_trill_maximum_version, tvb, offset, 1, ENC_BIG_ENDIAN);

        if ( sublen == 5 ) {
            offset++;
            proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_trill_affinity_tlv, tvb, offset, 4, ENC_NA);
            proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_trill_fgl_safe, tvb, offset, 4, ENC_NA);
            proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_trill_caps, tvb, offset, 4, ENC_NA);
            proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_trill_flags, tvb, offset, 4, ENC_NA);
        }

        return(0);

    case TREES:
        rt_tree = proto_tree_add_subtree_format(tree, tvb, offset-2, sublen+2,
                            ett_isis_lsp_clv_trees, NULL, "Trees (t=%u, l=%u)", subtype, sublen);

        proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_trees_nof_trees_to_compute, tvb, offset, 2, ENC_BIG_ENDIAN);
        proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_trees_maximum_nof_trees_to_compute, tvb, offset+2, 2, ENC_BIG_ENDIAN);
        proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_trees_nof_trees_to_use, tvb, offset+4, 2, ENC_BIG_ENDIAN);

        return(0);

    case TREE_IDENTIFIER:
        rt_tree = proto_tree_add_subtree_format(tree, tvb, offset-2, sublen+2,
                            ett_isis_lsp_clv_root_id, NULL, "Tree root identifiers (t=%u, l=%u)", subtype, sublen);

        root_id = tvb_get_ntohs(tvb, offset);
        proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_tree_root_id_starting_tree_no, tvb, offset, 2, ENC_BIG_ENDIAN);

        sublen -= 2;
        offset += 2;

        while (sublen>=2) {
            rt_block = tvb_get_ntohs(tvb, offset);
            proto_tree_add_uint_format(rt_tree, hf_isis_lsp_rt_capable_tree_root_id_nickname, tvb, offset, 2,
                                       rt_block, "Nickname(%dth root): 0x%04x (%d)", root_id, rt_block, rt_block);
            root_id++;
            sublen -= 2;
            offset += 2;
        }

        return(0);

    case NICKNAME:
        rt_tree = proto_tree_add_subtree_format(tree, tvb, offset-2, sublen+2,
                            ett_isis_lsp_clv_nickname, NULL, "Nickname (t=%u, l=%u)", subtype, sublen);

        while (sublen>=5) {
            proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_nickname_nickname_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
            proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_nickname_tree_root_priority, tvb, offset+1, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_nickname_nickname, tvb, offset+3, 2, ENC_BIG_ENDIAN);
            sublen -= 5;
            offset += 5;
        }

        return(0);

    case INTERESTED_VLANS:
        rt_tree = proto_tree_add_subtree_format(tree, tvb, offset-2, sublen+2,
                        ett_isis_lsp_clv_interested_vlans, NULL, "Interested VLANs and spanning tree roots (t=%u, l=%u)", subtype, sublen);

        proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_interested_vlans_nickname, tvb, offset, 2, ENC_BIG_ENDIAN);
        sublen -= 2;
        offset += 2;

        proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_interested_vlans_multicast_ipv4, tvb, offset, 2, ENC_BIG_ENDIAN);
        proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_interested_vlans_multicast_ipv6, tvb, offset, 2, ENC_BIG_ENDIAN);
        proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_interested_vlans_vlan_start_id, tvb, offset, 2, ENC_BIG_ENDIAN);
        sublen -= 2;
        offset += 2;

        proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_interested_vlans_vlan_end_id, tvb, offset, 2, ENC_BIG_ENDIAN);
        sublen -= 2;
        offset += 2;

        proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_interested_vlans_afs_lost_counter, tvb, offset, 4, ENC_BIG_ENDIAN);
        sublen -= 4;
        offset += 4;

        while (sublen>=6) {
            proto_tree_add_item(rt_tree, hf_isis_lsp_root_id, tvb, offset, 6, ENC_NA);
            sublen -= 6;
            offset += 6;
        }

        return(0);

    case TREES_USED_IDENTIFIER:
        rt_tree = proto_tree_add_subtree_format(tree, tvb, offset-2, sublen+2,
                    ett_isis_lsp_clv_tree_used, NULL, "Trees used identifiers (t=%u, l=%u)", subtype, sublen);

        root_id = tvb_get_ntohs(tvb, offset);
        proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_tree_used_id_starting_tree_no, tvb, offset, 2, ENC_BIG_ENDIAN);

        sublen -= 2;
        offset += 2;

        while (sublen>=2) {
            rt_block = tvb_get_ntohs(tvb, offset);
            proto_tree_add_uint_format(rt_tree, hf_isis_lsp_rt_capable_tree_used_id_nickname, tvb, offset,2,
                                       rt_block, "Nickname(%dth root): 0x%04x (%d)", root_id, rt_block, rt_block);
            root_id++;
            offset += 2;
            sublen -= 2;
        }

        return(0);

    case VLAN_GROUP:
        rt_tree = proto_tree_add_subtree_format(tree, tvb, offset-2, sublen+2,
                        ett_isis_lsp_clv_vlan_group, NULL, "VLAN group (t=%u, l=%u)", subtype, sublen);

        proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_vlan_group_primary_vlan_id, tvb, offset, 2, ENC_BIG_ENDIAN);

        offset += 2;
        sublen -= 2;

        while (sublen>=2) {

            proto_tree_add_item(rt_tree, hf_isis_lsp_rt_capable_vlan_group_secondary_vlan_id, tvb, offset, 2, ENC_BIG_ENDIAN);
            sublen -= 2;
            offset += 2;
        }

        return(0);

    default:
        return(-1);
    }
}

/*
 * Name: dissect_isis_rt_capable_clv()
 *
 * Description: Decode RouterCapability subTLVs
 *
 *   The Router Capability TLV is composed of 1 octet for the type,
 *   1 octet that specifies the number of bytes in the value field, and a
 *   variable length value field that can have any or all of the subTLVs
 *   that are listed in the below section
 *
 * Input:
 *   tvbuff_t * : tvbuffer for packet data
 *   proto_tree * : proto tree to build on (may be null)
 *   int : current offset into packet data
 *   int : length of IDs in packet.
 *   int : length of this clv
 *   len : local variable described to handle the length of the subTLV
 *
 * Output:
 *   void, will modify proto_tree if not null.
 */

/* As per RFC 7176 section 2.3 */
static void
dissect_isis_rt_capable_clv(tvbuff_t *tvb, packet_info* pinfo _U_,
        proto_tree *tree, int offset, int id_length _U_, int length)
{
    guint8 subtype, subtlvlen;

    proto_tree_add_item(tree, hf_isis_lsp_rt_capable_router_id, tvb, offset, 4, ENC_BIG_ENDIAN);
    offset += 4;
    length -= 4;
    proto_tree_add_item(tree, hf_isis_lsp_rt_capable_flag_s, tvb, offset, 1, ENC_BIG_ENDIAN);
    proto_tree_add_item(tree, hf_isis_lsp_rt_capable_flag_d, tvb, offset, 1, ENC_BIG_ENDIAN);
    length -= 1;
    offset += 1;

    while (length>=2) {
        subtype   = tvb_get_guint8(tvb, offset);
        subtlvlen = tvb_get_guint8(tvb, offset+1);
        length -= 2;
        offset += 2;

        if (subtlvlen > length) {
            proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_short_packet, tvb, offset-2, -1,
                                  "Short type %d TLV (%d vs %d)", subtype, subtlvlen, length);
            return;
        }

        if (dissect_isis_trill_clv(tvb, pinfo, tree, offset, subtype, subtlvlen)==-1) {

            proto_tree_add_expert_format( tree, pinfo, &ei_isis_lsp_subtlv, tvb, offset-2, subtlvlen+2,
                                      "Unknown SubTlv: Type: %d, Length: %d", subtype, subtlvlen);
        }
        length -= subtlvlen;
        offset += subtlvlen;
    }
}




/*
 * Name: dissect_lsp_ipv6_reachability_clv()
 *
 * Description: Decode an IPv6 reachability CLV - code 236.
 *
 *   CALLED BY TLV 237 DISSECTOR
 *
 * Input:
 *   tvbuff_t * : tvbuffer for packet data
 *   proto_tree * : proto tree to build on (may be null)
 *   int : current offset into packet data
 *   int : length of IDs in packet.
 *   int : length of this clv
 *
 * Output:
 *   void, will modify proto_tree if not null.
 */
static void
dissect_lsp_ipv6_reachability_clv(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree, int offset,
    int id_length _U_, int length)
{
    proto_tree        *subtree = NULL;
    proto_tree        *subtree2 = NULL;
    guint8            ctrl_info;
    guint             bit_length;
    int               byte_length;
    struct e_in6_addr prefix;
    guint             len,i;
    guint             subclvs_len;
    guint             clv_code, clv_len;

    if (!tree) return;

    while (length > 0) {
        ctrl_info = tvb_get_guint8(tvb, offset+4);
        bit_length = tvb_get_guint8(tvb, offset+5);
        byte_length = ipv6_addr_and_mask(tvb, offset+6, &prefix, bit_length);
        if (byte_length == -1) {
            proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                "IPv6 prefix has an invalid length: %d bits", bit_length );
                return;
            }
        subclvs_len = 0;
        if ((ctrl_info & 0x20) != 0)
            subclvs_len = 1+tvb_get_guint8(tvb, offset+6+byte_length);

        subtree = proto_tree_add_subtree(tree, tvb, offset, 6+byte_length+subclvs_len,
            ett_isis_lsp_part_of_clv_ipv6_reachability, NULL, "IPv6 Reachability");

        proto_tree_add_ipv6_format_value(subtree, hf_isis_lsp_ipv6_reachability_ipv6_prefix, tvb, offset+6, byte_length,
                             (guint8*)&prefix, "IPv6 prefix: %s/%u", ip6_to_str (&prefix), bit_length);

        proto_tree_add_item(subtree, hf_isis_lsp_ipv6_reachability_metric, tvb, offset, 4, ENC_BIG_ENDIAN);
        proto_tree_add_item(subtree, hf_isis_lsp_ipv6_reachability_distribution, tvb, offset+4, 1, ENC_NA);
        proto_tree_add_item(subtree, hf_isis_lsp_ipv6_reachability_distribution_internal, tvb, offset+4, 1, ENC_NA);

        if ((ctrl_info & 0x1f) != 0) {
            proto_tree_add_item(subtree, hf_isis_lsp_ipv6_reachability_reserved_bits, tvb, offset+4, 1, ENC_BIG_ENDIAN);
        }

        len = 6 + byte_length;
        if ((ctrl_info & 0x20) != 0) {
            subclvs_len = tvb_get_guint8(tvb, offset+len);
            subtree2 = proto_tree_add_subtree_format(subtree, tvb, offset+len, subclvs_len+1,
                                      ett_isis_lsp_clv_ip_reach_subclv, NULL, "sub-TLVs present, total length: %u bytes",
                                      subclvs_len);

            i =0;
            while (i < subclvs_len) {
                clv_code = tvb_get_guint8(tvb, offset+len+1); /* skip the total subtlv len indicator */
                clv_len  = tvb_get_guint8(tvb, offset+len+2);
                dissect_ipreach_subclv(tvb, subtree2, offset+len+3, clv_code, clv_len);
                i += clv_len + 2;
            }
            len += 1 + subclvs_len;
        } else {
            proto_tree_add_text (subtree, tvb, offset+4, len, "no sub-TLVs present");
        }
        offset += len;
        length -= len;
    }
}

/*
 * Name: dissect_lsp_nlpid_clv()
 *
 * Description:
 *    Decode for a lsp packets NLPID clv.  Calls into the
 *    clv common one.
 *
 * Input:
 *    tvbuff_t * : tvbuffer for packet data
 *    proto_tree * : proto tree to build on (may be null)
 *    int : current offset into packet data
 *    int : length of IDs in packet.
 *    int : length of this clv
 *
 * Output:
 *    void, will modify proto_tree if not null.
 */
static void
dissect_lsp_nlpid_clv(tvbuff_t *tvb, packet_info* pinfo _U_, proto_tree *tree, int offset,
    int id_length _U_, int length)
{
    isis_dissect_nlpid_clv(tvb, tree, hf_isis_lsp_clv_nlpid, offset, length);
}

/*
 * Name: dissect_lsp_mt_clv()
 *
 * Description: - code 229
 *    Decode for a lsp packets Multi Topology clv.  Calls into the
 *    clv common one.
 *
 * Input:
 *      tvbuff_t * : tvbuffer for packet data
 *      proto_tree * : proto tree to build on (may be null)
 *    int : current offset into packet data
 *    guint : length of this clv
 *    int : length of IDs in packet.
 *
 * Output:
 *    void, will modify proto_tree if not null.
 */
static void
dissect_lsp_mt_clv(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree, int offset,
    int id_length _U_, int length)
{
    isis_dissect_mt_clv(tvb, pinfo, tree, offset, length, hf_isis_lsp_clv_mt, &ei_isis_lsp_clv_mt );
}

/*
 * Name: dissect_lsp_hostname_clv()
 *
 * Description:
 *      Decode for a lsp packets hostname clv.  Calls into the
 *      clv common one.
 *
 * Input:
 *      tvbuff_t * : tvbuffer for packet data
 *      proto_tree * : proto tree to build on (may be null)
 *      int : current offset into packet data
 *      int : length of IDs in packet.
 *      int : length of this clv
 *
 * Output:
 *      void, will modify proto_tree if not null.
 */
static void
dissect_lsp_hostname_clv(tvbuff_t *tvb, packet_info* pinfo _U_, proto_tree *tree, int offset,
    int id_length _U_, int length)
{
    isis_dissect_hostname_clv(tvb, tree, offset, length,
        hf_isis_lsp_hostname);
}


/*
 * Name: dissect_lsp_te_router_id_clv()
 *
 * Description:
 *      Decode for a lsp packets Traffic Engineering ID clv.  Calls into the
 *      clv common one.
 *
 * Input:
 *      tvbuff_t * : tvbuffer for packet data
 *      proto_tree * : proto tree to build on (may be null)
 *      int : current offset into packet data
 *      int : length of IDs in packet.
 *      int : length of this clv
 *
 * Output:
 *      void, will modify proto_tree if not null.
 */
static void
dissect_lsp_te_router_id_clv(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree, int offset,
    int id_length _U_, int length)
{
    isis_dissect_te_router_id_clv(tree, pinfo, tvb, &ei_isis_lsp_short_packet, offset, length,
        hf_isis_lsp_clv_te_router_id );
}


/*
 * Name: dissect_lsp_ip_int_addr_clv()
 *
 * Description:
 *    Decode for a lsp packets ip interface addr clv.  Calls into the
 *    clv common one.
 *
 * Input:
 *    tvbuff_t * : tvbuffer for packet data
 *    proto_tree * : proto tree to build on (may be null)
 *    int : current offset into packet data
 *    int : length of IDs in packet.
 *    int : length of this clv
 *
 * Output:
 *    void, will modify proto_tree if not null.
 */
static void
dissect_lsp_ip_int_addr_clv(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree, int offset,
    int id_length _U_, int length)
{
    isis_dissect_ip_int_clv(tree, pinfo, tvb, &ei_isis_lsp_short_packet, offset, length,
        hf_isis_lsp_clv_ipv4_int_addr );
}

/*
 * Name: dissect_lsp_ipv6_int_addr_clv()
 *
 * Description: Decode an IPv6 interface addr CLV - code 232.
 *
 *   Calls into the clv common one.
 *
 * Input:
 *   tvbuff_t * : tvbuffer for packet data
 *   proto_tree * : proto tree to build on (may be null)
 *   int : current offset into packet data
 *   int : length of IDs in packet.
 *   int : length of this clv
 *
 * Output:
 *   void, will modify proto_tree if not null.
 */
static void
dissect_lsp_ipv6_int_addr_clv(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree, int offset,
    int id_length _U_, int length)
{
    isis_dissect_ipv6_int_clv(tree, pinfo, tvb, &ei_isis_lsp_short_packet, offset, length,
        hf_isis_lsp_clv_ipv6_int_addr );
}

static void
dissect_isis_lsp_clv_mt_cap_spb_instance(tvbuff_t *tvb, packet_info *pinfo,
        proto_tree *tree, int offset, int subtype, int sublen)
{
    const int CIST_ROOT_ID_LEN            = 8; /* CIST Root Identifier */
    const int CIST_EXT_ROOT_PATH_COST_LEN = 4; /* CIST External Root Path Cost */
    const int BRIDGE_PRI_LEN              = 2; /* Bridge Priority */
    const int V_SPSOURCEID_LEN            = 4; /* v | SPSourceID */
    const int NUM_TREES_LEN               = 1; /* num of trees */

    const int CIST_ROOT_ID_OFFSET = 0;
    const int CIST_EXT_ROOT_PATH_COST_OFFSET = CIST_ROOT_ID_OFFSET            + CIST_ROOT_ID_LEN;
    const int BRIDGE_PRI_OFFSET              = CIST_EXT_ROOT_PATH_COST_OFFSET + CIST_EXT_ROOT_PATH_COST_LEN;
    const int V_SPSOURCEID_OFFSET            = BRIDGE_PRI_OFFSET              + BRIDGE_PRI_LEN;
    const int NUM_TREES_OFFSET               = V_SPSOURCEID_OFFSET            + V_SPSOURCEID_LEN;
    const int FIXED_LEN                      = NUM_TREES_OFFSET               + NUM_TREES_LEN;
    const int VLAN_ID_TUPLE_LEN = 8;

    if (sublen < FIXED_LEN) {
        proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                              "Short SPB Digest subTLV (%d vs %d)", sublen, FIXED_LEN);
        return;
    }
    else {
        proto_tree *subtree, *ti;
        int subofs = offset;
        const guint8 *cist_root_identifier = tvb_get_ptr   (tvb, subofs + CIST_ROOT_ID_OFFSET, CIST_ROOT_ID_LEN);
        guint8        num_trees            = tvb_get_guint8(tvb, subofs + NUM_TREES_OFFSET);

        /*************************/
        subtree = proto_tree_add_subtree_format( tree, tvb, offset-2, sublen+2, ett_isis_lsp_clv_mt_cap_spb_instance, NULL,
                                  "SPB Instance: Type: 0x%02x, Length: %d", subtype, sublen);

        /*************************/
        proto_tree_add_bytes_format_value( subtree, hf_isis_lsp_mt_cap_spb_instance_cist_root_identifier, tvb, subofs + CIST_ROOT_ID_OFFSET, CIST_ROOT_ID_LEN,
                             cist_root_identifier, "%08x-%08x-%08x-%08x-%08x-%08x-%08x-%08x",
                             cist_root_identifier[0], cist_root_identifier[1], cist_root_identifier[2],
                             cist_root_identifier[3], cist_root_identifier[4], cist_root_identifier[5],
                             cist_root_identifier[6], cist_root_identifier[7]);
        proto_tree_add_item(subtree, hf_isis_lsp_mt_cap_spb_instance_cist_external_root_path_cost, tvb, subofs + CIST_EXT_ROOT_PATH_COST_OFFSET, CIST_EXT_ROOT_PATH_COST_LEN, ENC_BIG_ENDIAN);
        proto_tree_add_item(subtree, hf_isis_lsp_mt_cap_spb_instance_bridge_priority, tvb, subofs + BRIDGE_PRI_OFFSET, BRIDGE_PRI_LEN, ENC_BIG_ENDIAN);

        proto_tree_add_item(subtree, hf_isis_lsp_mt_cap_spb_instance_v, tvb, subofs + V_SPSOURCEID_OFFSET, V_SPSOURCEID_LEN, ENC_BIG_ENDIAN);

        proto_tree_add_item(subtree, hf_isis_lsp_mt_cap_spsourceid, tvb, subofs + V_SPSOURCEID_OFFSET, V_SPSOURCEID_LEN, ENC_BIG_ENDIAN);
        ti = proto_tree_add_item(subtree, hf_isis_lsp_mt_cap_spb_instance_number_of_trees, tvb, subofs + NUM_TREES_OFFSET, NUM_TREES_LEN, ENC_BIG_ENDIAN);
        if (num_trees == 0)
            proto_item_append_text(ti, " Invalid subTLV: zero trees");

        subofs += FIXED_LEN;
        sublen -= FIXED_LEN;

        /*************************/
        if (sublen != (num_trees * VLAN_ID_TUPLE_LEN)) {
            proto_tree_add_text( subtree, tvb, subofs, 0,
                                 "SubTLV length doesn't match number of trees");
            return;
        }
        while (sublen > 0 && num_trees > 0) {
            if (sublen < VLAN_ID_TUPLE_LEN) {
                proto_tree_add_expert_format(subtree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                                      "Short VLAN_ID entry (%d vs %d)", sublen, VLAN_ID_TUPLE_LEN);
                return;
            }
            else {
                const guint8 flags       = tvb_get_guint8(tvb, subofs);
                const guint8 *ect_id     = tvb_get_ptr(tvb, subofs + 1, 4);
                const guint8 *bvid_spvid = tvb_get_ptr(tvb, subofs + 1 + 4, 3);
                const guint16 bvid       = (0xff0 & (((guint16)bvid_spvid[0]) << 4)) | (0x0f & (bvid_spvid[1] >> 4));
                const guint16 spvid      = (0xf00 & (((guint16)bvid_spvid[1]) << 8)) | (0xff & (bvid_spvid[2]));
                proto_tree_add_text( subtree, tvb, subofs, VLAN_ID_TUPLE_LEN,
                                     "  U: %u, M: %u, A: %u, ECT: %02x-%02x-%02x-%02x, BVID: 0x%03x (%d),%s SPVID: 0x%03x (%d)",
                                     (flags >> 7) & 1,
                                     (flags >> 6) & 1,
                                     (flags >> 5) & 1,
                                     ect_id[0], ect_id[1], ect_id[2], ect_id[3],
                                     bvid, bvid,
                                     (  bvid < 10   ? "   "
                                      : bvid < 100  ? "  "
                                      : bvid < 1000 ? " "
                                      : ""),
                                     spvid, spvid);
                subofs += VLAN_ID_TUPLE_LEN;
                sublen -= VLAN_ID_TUPLE_LEN;
                --num_trees;
            }
        }
        if (num_trees) {
            proto_tree_add_expert_format(subtree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                                  "Short subTLV (%d vs %d)", sublen, num_trees * VLAN_ID_TUPLE_LEN);
            return;
        }
    }
}
static void
dissect_isis_lsp_clv_mt_cap_spb_oalg(tvbuff_t   *tvb,
    proto_tree *tree, int offset, int subtype, int sublen)
{
    proto_tree_add_text( tree, tvb, offset, -1,
                          "MT-Cap SPB Opaque Algorithm: Type: 0x%02x, Length: %d", subtype, sublen);
}
static void
dissect_isis_lsp_clv_mt_cap_spbm_service_identifier(tvbuff_t *tvb, packet_info *pinfo,
    proto_tree *tree, int offset, int subtype, int sublen)
{
    const int BMAC_LEN = 6; /* B-MAC Address */
    const int BVID_LEN = 2; /* Base-VID */

    const int BMAC_OFFSET = 0;
    const int BVID_OFFSET = BMAC_OFFSET + BMAC_LEN;
    const int FIXED_LEN   = BVID_OFFSET + BVID_LEN;

    const int ISID_LEN = 4;

    if (sublen < FIXED_LEN) {
        proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                              "Short SPBM Service Identifier and Unicast Address subTLV (%d vs %d)", sublen, FIXED_LEN);
        return;
    }
    else {
        proto_tree *subtree;
        int subofs = offset;

        /*************************/
        subtree = proto_tree_add_subtree_format( tree, tvb, offset-2, sublen+2, ett_isis_lsp_clv_mt_cap_spbm_service_identifier, NULL,
                                  "SPB Service ID and Unicast Address: Type: 0x%02x, Length: %d", subtype, sublen);

        /*************************/
        proto_tree_add_item(subtree, hf_isis_lsp_mt_cap_spbm_service_identifier_b_mac, tvb, subofs + BMAC_OFFSET, BMAC_LEN, ENC_NA);
        proto_tree_add_item(subtree, hf_isis_lsp_mt_cap_spbm_service_identifier_base_vid, tvb, subofs + BVID_OFFSET, BVID_LEN, ENC_BIG_ENDIAN);

        subofs += FIXED_LEN;
        sublen -= FIXED_LEN;

        /*************************/
        while (sublen > 0) {
            if (sublen < ISID_LEN) {
                proto_tree_add_expert_format(subtree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                                      "Short ISID entry (%d vs %d)", sublen, ISID_LEN);
                return;
            }
            else {
                const guint32 isid = tvb_get_ntohl(tvb, subofs);
                proto_tree_add_text( subtree, tvb, subofs, ISID_LEN,
                                     "  T: %u, R: %u, ISID: 0x%06x (%d)",
                                     (isid >> 31) & 1,
                                     (isid >> 30) & 1,
                                     isid & 0x00ffffff,
                                     isid & 0x00ffffff);
                subofs += ISID_LEN;
                sublen -= ISID_LEN;
            }
        }
    }
}
static void
dissect_isis_lsp_clv_mt_cap_spbv_mac_address(tvbuff_t *tvb, packet_info *pinfo,
    proto_tree *tree, int offset, int subtype, int sublen)
{
    guint16 fixed_data;
    guint16 spvid;
    guint8 sr_bit;
    const int GMAC_LEN = 6; /* GMAC Address */
    const int SPVID_LEN = 2; /* SPVID */
    const int MAC_TUPLE_LEN = 7;

    const int SPVID_OFFSET = 0;
    const int FIXED_LEN    = SPVID_OFFSET + SPVID_LEN;

    if (sublen < FIXED_LEN) {
        proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                              "Short SPBV Mac Address subTLV (%d vs %d)", sublen, FIXED_LEN);
        return;
    }
    else {
        proto_tree *subtree;
        int subofs = offset;
        fixed_data = tvb_get_ntohs(tvb, subofs);
        spvid = (fixed_data & 0x0FFF);
        sr_bit = (fixed_data & 0x3000) >> 12;

        /*************************/
        subtree = proto_tree_add_subtree_format( tree, tvb, offset-2, sublen+2, ett_isis_lsp_clv_mt_cap_spbv_mac_address, NULL,
                                  "SPBV Mac Address: Type: 0x%02x, Length: %d", subtype, sublen);

        /*************************/
        proto_tree_add_uint(subtree, hf_isis_lsp_spb_sr_bit,
                            tvb, subofs, 1, sr_bit);
        proto_tree_add_uint(subtree, hf_isis_lsp_spb_spvid,
                                    tvb, subofs, 2, spvid);

        subofs += FIXED_LEN;
        sublen -= FIXED_LEN;

        /*************************/
        while (sublen > 0) {
            if (sublen < MAC_TUPLE_LEN) {
                proto_tree_add_expert_format(subtree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                                      "Short MAC Address entry (%d vs %d)", sublen, MAC_TUPLE_LEN);
                return;
            }
            else {
                const guint32 tr_bit = tvb_get_guint8(tvb, subofs);
                const guint8 *gmac   = tvb_get_ptr(tvb, subofs + 1, GMAC_LEN);
                proto_tree_add_text( subtree, tvb, subofs, MAC_TUPLE_LEN,
                                     "  T: %u, R: %u, MAC: %02x-%02x-%02x-%02x-%02x-%02x",
                                     (tr_bit >> 7) & 1,
                                     (tr_bit >> 6) & 1,
                                     gmac[0],
                                     gmac[1],
                                     gmac[2],
                                     gmac[3],
                                     gmac[4],
                                     gmac[5]);
                subofs += MAC_TUPLE_LEN;
                sublen -= MAC_TUPLE_LEN;
            }
        }
    }
}




/*
 * Name: dissect_lsp_clv_mt_cap()
 *
 * Description: Decode an ISIS MT-CAP CLV - code 144.
 *
 * Input:
 *   tvbuff_t * : tvbuffer for packet data
 *   proto_tree * : proto tree to build on (may be null)
 *   int : current offset into packet data
 *   int : length of IDs in packet.
 *   int : length of this clv
 *
 * Output:
 *   void, will modify proto_tree if not null.
 */
static void
dissect_isis_lsp_clv_mt_cap(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree, int offset,
                            int id_length _U_, int length)
{
    if (length >= 2) {
        /* mtid */
        proto_tree_add_item( tree, hf_isis_lsp_mt_cap_mtid, tvb, offset, 2, ENC_BIG_ENDIAN);
        proto_tree_add_item(tree, hf_isis_lsp_mt_cap_overload, tvb, offset, 2, ENC_BIG_ENDIAN);
        length -= 2;
        offset += 2;
        while (length >= 2) {
            guint8 subtype   = tvb_get_guint8(tvb, offset);
            guint8 subtlvlen = tvb_get_guint8(tvb, offset+1);
            length -= 2;
            offset += 2;
            if (subtlvlen > length) {
                proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_short_packet, tvb, offset-2, -1,
                                      "Short type %d TLV (%d vs %d)", subtype, subtlvlen, length);
                return;
            }
            if (subtype == 0x01) { /* SPB Instance */
                dissect_isis_lsp_clv_mt_cap_spb_instance(tvb, pinfo, tree, offset, subtype, subtlvlen);
            }
            else if (subtype == 0x02) { /* OALG */
                dissect_isis_lsp_clv_mt_cap_spb_oalg(tvb, tree, offset, subtype, subtlvlen);
            }
            else if (subtype == 0x03) { /* SPBM Service Identifier */
                dissect_isis_lsp_clv_mt_cap_spbm_service_identifier(tvb, pinfo, tree, offset, subtype, subtlvlen);
            }
            else if (subtype == 0x04) { /* SPBV Mac Address */
                dissect_isis_lsp_clv_mt_cap_spbv_mac_address(tvb, pinfo, tree, offset, subtype, subtlvlen);
            }
            else if (dissect_isis_trill_clv(tvb, pinfo, tree, offset, subtype, subtlvlen)==-1) {
                proto_tree_add_expert_format( tree, pinfo, &ei_isis_lsp_subtlv, tvb, offset-2, subtlvlen+2,
                                      "Unknown SubTlv: Type: %d, Length: %d", subtype, subtlvlen);
            }
            length -= subtlvlen;
            offset += subtlvlen;
        }

    }
}

/*
 * Name: dissect_lsp_authentication_clv()
 *
 * Description:
 *    Decode for a lsp packets authenticaion clv.  Calls into the
 *    clv common one.
 *
 * Input:
 *    tvbuff_t * : tvbuffer for packet data
 *    proto_tree * : proto tree to build on (may be null)
 *    int : current offset into packet data
 *    int : length of IDs in packet.
 *    int : length of this clv
 *
 * Output:
 *    void, will modify proto_tree if not null.
 */
static void
dissect_lsp_authentication_clv(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree, int offset,
    int id_length _U_, int length)
{
    isis_dissect_authentication_clv(tree, pinfo, tvb, hf_isis_lsp_authentication, &ei_isis_lsp_authentication, offset, length);
}

/*
 * Name: dissect_lsp_ip_authentication_clv()
 *
 * Description:
 *    Decode for a lsp packets authenticaion clv.  Calls into the
 *    clv common one.
 *
 * Input:
 *    tvbuff_t * : tvbuffer for packet data
 *    proto_tree * : proto tree to build on (may be null)
 *    int : current offset into packet data
 *    int : length of IDs in packet.
 *    int : length of this clv
 *
 * Output:
 *    void, will modify proto_tree if not null.
 */
static void
dissect_lsp_ip_authentication_clv(tvbuff_t *tvb, packet_info* pinfo _U_, proto_tree *tree, int offset,
    int id_length _U_, int length)
{
    if ( length != 0 ) {
       proto_tree_add_item(tree, hf_isis_lsp_ip_authentication, tvb, offset, length, ENC_ASCII|ENC_NA);
    }
}

/*
 * Name: dissect_lsp_area_address_clv()
 *
 * Description:
 *    Decode for a lsp packet's area address clv.  Call into clv common
 *    one.
 *
 * Input:
 *    tvbuff_t * : tvbuffer for packet data
 *    proto_tree * : protocol display tree to fill out.  May be NULL
 *    int : offset into packet data where we are.
 *    int : length of IDs in packet.
 *    int : length of clv we are decoding
 *
 * Output:
 *      void, but we will add to proto tree if !NULL.
 */
static void
dissect_lsp_area_address_clv(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree, int offset,
    int id_length _U_, int length)
{
    isis_dissect_area_address_clv(tree, pinfo, tvb, &ei_isis_lsp_short_packet, hf_isis_lsp_area_address, offset, length);
}

/*
 * Name: dissect_lsp_eis_neighbors_clv_inner()
 *
 * Description:
 *    Real work horse for showing neighbors.  This means we decode the
 *    first octet as either virtual/!virtual (if show_virtual param is
 *    set), or as a must == 0 reserved value.
 *
 *    Once past that, we decode n neighbor elements.  Each neighbor
 *    is comprised of a metric block (is dissect_metric) and the
 *    addresses.
 *
 * Input:
 *    tvbuff_t * : tvbuffer for packet data
 *    proto_tree * : protocol display tree to fill out.  May be NULL
 *    int : offset into packet data where we are.
 *    int : length of IDs in packet.
 *    int : length of clv we are decoding
 *    int : set to decode first octet as virtual vs reserved == 0
 *    int : set to indicate EIS instead of IS (6 octet per addr instead of 7)
 *
 * Output:
 *      void, but we will add to proto tree if !NULL.
 */
static void
dissect_lsp_eis_neighbors_clv_inner(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
    int offset, int length, int id_length, int show_virtual, int is_eis)
{
    proto_item     *ti;
    proto_tree    *ntree = NULL;
    int        tlen;

    if (!is_eis) {
        id_length++;    /* IDs are one octet longer in IS neighbours */
        if ( tree ) {
            if ( show_virtual ) {
                /* virtual path flag */
                proto_tree_add_text ( tree, tvb, offset, 1,
                   tvb_get_guint8(tvb, offset) ? "IsVirtual" : "IsNotVirtual" );
            } else {
                proto_tree_add_item(tree, hf_isis_lsp_eis_neighbors_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
            }
        }
        offset++;
        length--;
    }
    tlen = 4 + id_length;

    while ( length > 0 ) {
        if (length<tlen) {
            proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                "short E/IS reachability (%d vs %d)", length, tlen );
            return;
        }
        /*
         * Gotta build a sub-tree for all our pieces
         */
        if ( tree ) {
            if ( is_eis ) {
                ntree = proto_tree_add_subtree(tree, tvb, offset, tlen, ett_isis_lsp_clv_is_neighbors, &ti, "ES Neighbor");
            } else {
                ntree = proto_tree_add_subtree(tree, tvb, offset, tlen, ett_isis_lsp_clv_is_neighbors, &ti, "IS Neighbor");
            }

            proto_tree_add_item(ntree, hf_isis_lsp_eis_neighbors_default_metric, tvb, offset, 1, ENC_BIG_ENDIAN);
            proto_tree_add_item(ntree, hf_isis_lsp_eis_neighbors_default_metric_ie, tvb, offset, 1, ENC_NA);

            proto_tree_add_item(ntree, hf_isis_lsp_eis_neighbors_delay_metric, tvb, offset, 1, ENC_BIG_ENDIAN);
            proto_tree_add_item(ntree, hf_isis_lsp_eis_neighbors_delay_metric_supported, tvb, offset, 1, ENC_NA);

            proto_tree_add_item(ntree, hf_isis_lsp_eis_neighbors_delay_metric_ie, tvb, offset+1, 1, ENC_NA);

            proto_tree_add_item(ntree, hf_isis_lsp_eis_neighbors_expense_metric, tvb, offset, 1, ENC_BIG_ENDIAN);
            proto_tree_add_item(ntree, hf_isis_lsp_eis_neighbors_expense_metric_supported, tvb, offset, 1, ENC_NA);
            proto_tree_add_item(ntree, hf_isis_lsp_eis_neighbors_expense_metric_ie, tvb, offset+2, 1, ENC_NA);

            proto_tree_add_item(ntree, hf_isis_lsp_eis_neighbors_error_metric, tvb, offset, 1, ENC_BIG_ENDIAN);
            proto_tree_add_item(ntree, hf_isis_lsp_eis_neighbors_error_metric_supported, tvb, offset, 1, ENC_NA);
            proto_tree_add_item(ntree, hf_isis_lsp_eis_neighbors_error_metric_ie, tvb, offset+3, 1, ENC_NA);
            proto_tree_add_item(ntree, is_eis ? hf_isis_lsp_eis_neighbors_es_neighbor_id : hf_isis_lsp_eis_neighbors_is_neighbor_id,
                                    tvb, offset+4, id_length, ENC_NA);
            proto_item_append_text(ti, ": %s", tvb_print_system_id(tvb, offset+4, id_length));
        }
        offset += tlen;
        length -= tlen;
    }
}

/*
 * Name: dissect_lsp_l1_is_neighbors_clv()
 *
 * Description:
 *    Dispatch a l1 intermediate system neighbor by calling
 *    the inner function with show virtual set to TRUE and is es set to FALSE.
 *
 * Input:
 *    tvbuff_t * : tvbuffer for packet data
 *    proto_tree * : protocol display tree to fill out.  May be NULL
 *    int : offset into packet data where we are.
 *    int : length of IDs in packet.
 *    int : length of clv we are decoding
 *
 * Output:
 *      void, but we will add to proto tree if !NULL.
 */
static void
dissect_lsp_l1_is_neighbors_clv(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree, int offset,
    int id_length, int length)
{
    dissect_lsp_eis_neighbors_clv_inner(tvb, pinfo, tree, offset,
        length, id_length, TRUE, FALSE);
}

/*
 * Name: dissect_lsp_l1_es_neighbors_clv()
 *
 * Description:
 *    Dispatch a l1 end or intermediate system neighbor by calling
 *    the inner function with show virtual set to TRUE and es set to TRUE.
 *
 * Input:
 *    tvbuff_t * : tvbuffer for packet data
 *    proto_tree * : protocol display tree to fill out.  May be NULL
 *    int : offset into packet data where we are.
 *    int : length of IDs in packet.
 *    int : length of clv we are decoding
 *
 * Output:
 *      void, but we will add to proto tree if !NULL.
 */
static void
dissect_lsp_l1_es_neighbors_clv(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree, int offset,
    int id_length, int length)
{
    dissect_lsp_eis_neighbors_clv_inner(tvb, pinfo, tree, offset,
        length, id_length, TRUE, TRUE);
}

/*
 * Name: dissect_lsp_l2_is_neighbors_clv()
 *
 * Description:
 *    Dispatch a l2 intermediate system neighbor by calling
 *    the inner function with show virtual set to FALSE, and is es set
 *    to FALSE
 *
 * Input:
 *    tvbuff_t * : tvbuffer for packet data
 *    proto_tree * : protocol display tree to fill out.  May be NULL
 *    int : offset into packet data where we are.
 *    int : length of IDs in packet.
 *    int : length of clv we are decoding
 *
 * Output:
 *      void, but we will add to proto tree if !NULL.
 */
static void
dissect_lsp_l2_is_neighbors_clv(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree, int offset,
    int id_length, int length)
{
    dissect_lsp_eis_neighbors_clv_inner(tvb, pinfo, tree, offset,
        length, id_length, FALSE, FALSE);
}


/*
 * Name: dissect_subclv_admin_group ()
 *
 * Description: Called by function dissect_lsp_ext_is_reachability_clv().
 *
 *   This function is called by dissect_lsp_ext_is_reachability_clv()
 *   for dissect the administrive group sub-CLV (code 3).
 *
 * Input:
 *   tvbuff_t * : tvbuffer for packet data
 *   proto_tree * : protocol display tree to fill out.
 *   int : offset into packet data where we are (beginning of the sub_clv value).
 *
 * Output:
 *   void
 */
static void
dissect_subclv_admin_group (tvbuff_t *tvb, proto_tree *tree, int offset) {
    proto_tree *ntree;
    guint32    clv_value;
    guint32    mask;
    int        i;

    ntree = proto_tree_add_subtree(tree, tvb, offset-2, 6,
                ett_isis_lsp_subclv_admin_group, NULL, "Administrative group(s):");

    clv_value = tvb_get_ntohl(tvb, offset);
    mask = 1;
    for (i = 0 ; i < 32 ; i++) {
        if ( (clv_value & mask) != 0 ) {
            proto_tree_add_text (ntree, tvb, offset, 4, "group %d", i);
        }
        mask <<= 1;
    }
}

/*
 * Name: dissect_subclv_max_bw ()
 *
 * Description: Called by function dissect_lsp_ext_is_reachability_clv().
 *
 *   This function is called by dissect_lsp_ext_is_reachability_clv()
 *   for dissect the maximum link bandwidth sub-CLV (code 9).
 *
 * Input:
 *   tvbuff_t * : tvbuffer for packet data
 *   proto_tree * : protocol display tree to fill out.
 *   int : offset into packet data where we are (beginning of the sub_clv value).
 *
 * Output:
 *   void
 */
static void
dissect_subclv_max_bw(tvbuff_t *tvb, proto_tree *tree, int offset)
{
    gfloat  bw;

    bw = tvb_get_ntohieee_float(tvb, offset)*8/1000000;
    proto_tree_add_float_format_value(tree, hf_isis_lsp_maximum_link_bandwidth, tvb, offset-2, 6,
        bw, "%.2f Mbps", bw);
}

/*
 * Name: dissect_subclv_rsv_bw ()
 *
 * Description: Called by function dissect_lsp_ext_is_reachability_clv().
 *
 *   This function is called by dissect_lsp_ext_is_reachability_clv()
 *   for dissect the reservable link bandwidth sub-CLV (code 10).
 *
 * Input:
 *   tvbuff_t * : tvbuffer for packet data
 *   proto_tree * : protocol display tree to fill out.
 *   int : offset into packet data where we are (beginning of the sub_clv value).
 *
 * Output:
 *   void
 */
static void
dissect_subclv_rsv_bw(tvbuff_t *tvb, proto_tree *tree, int offset)
{
    gfloat  bw;

    bw = tvb_get_ntohieee_float(tvb, offset)*8/1000000;
    proto_tree_add_float_format_value (tree, hf_isis_lsp_reservable_link_bandwidth, tvb, offset-2, 6,
        bw, "%.2f Mbps", bw );
}

/*
 * Name: dissect_subclv_unrsv_bw ()
 *
 * Description: Called by function dissect_lsp_ext_is_reachability_clv().
 *
 *   This function is called by dissect_lsp_ext_is_reachability_clv()
 *   for dissect the unreserved bandwidth sub-CLV (code 11).
 *
 * Input:
 *   tvbuff_t * : tvbuffer for packet data
 *   proto_tree * : protocol display tree to fill out.
 *   int : offset into packet data where we are (beginning of the sub_clv value).
 *
 * Output:
 *   void
 */
static void
dissect_subclv_unrsv_bw(tvbuff_t *tvb, proto_tree *tree, int offset)
{
    proto_tree *ntree;
    gfloat     bw;
    int        i;

    ntree = proto_tree_add_subtree(tree, tvb, offset-2, 34,
                    ett_isis_lsp_subclv_unrsv_bw, NULL, "Unreserved bandwidth:");

    for (i = 0 ; i < 8 ; i++) {
        bw = tvb_get_ntohieee_float(tvb, offset+4*i)*8/1000000;
        proto_tree_add_float_format(ntree, hf_isis_lsp_unrsv_bw_priority_level, tvb, offset+4*i, 4,
            bw, "priority level %d: %.2f Mbps", i, bw );
    }
}

/*
 * Name: dissect_subclv_spb_link_metric ()
 *
 * Description: Called by function dissect_lsp_ext_is_reachability_clv().
 *
 *   This function is called by dissect_lsp_ext_is_reachability_clv()
 *   for dissect the SPB link metric sub-CLV (code 29).
 *
 * Input:
 *   tvbuff_t * : tvbuffer for packet data
 *   proto_tree * : protocol display tree to fill out.
 *   int : offset into packet data where we are (beginning of the sub_clv value).
 *   int : subtlv type
 *   int : subtlv length
 *
 * Output:
 *   void
 */

static void
dissect_subclv_spb_link_metric(tvbuff_t *tvb, packet_info *pinfo,
        proto_tree *tree, int offset, int subtype, int sublen)
{
    const int SUBLEN     = 6;

    if (sublen != SUBLEN) {
        proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                              "Short SPB Link Metric sub-TLV (%d vs %d)", sublen, SUBLEN);
        return;
    }
    else {
        proto_tree *subtree;
        subtree = proto_tree_add_subtree_format( tree, tvb, offset-2, sublen+2, ett_isis_lsp_subclv_spb_link_metric, NULL,
                                  "SPB Link Metric: Type: 0x%02x (%d), Length: %d", subtype, subtype, sublen);

        proto_tree_add_item(subtree, hf_isis_lsp_spb_link_metric,
                            tvb, offset, 3, ENC_BIG_ENDIAN);

        proto_tree_add_item(subtree, hf_isis_lsp_spb_port_count,
                            tvb, offset+3, 1, ENC_BIG_ENDIAN);

        proto_tree_add_item(subtree, hf_isis_lsp_spb_port_id,
                            tvb, offset+4, 2, ENC_BIG_ENDIAN);
    }
}

/*
 * Name: dissect_lsp_ext_is_reachability_clv()
 *
 * Description: Decode a Extended IS Reachability CLV - code 22
 * RFC 3784
 *
 *   The extended IS reachability TLV is an extended version
 *   of the IS reachability TLV (code 2). It encodes the metric
 *   as a 24-bit unsigned integer and allows to add sub-CLV(s).
 *
 *   CALLED BY TLV 222 DISSECTOR
 *
 * Input:
 *   tvbuff_t * : tvbuffer for packet data
 *   proto_tree * : protocol display tree to fill out.  May be NULL
 *   int : offset into packet data where we are.
 *   int : length of IDs in packet.
 *   int : length of clv we are decoding
 *
 * Output:
 *   void, but we will add to proto tree if !NULL.
 */
static void
dissect_lsp_ext_is_reachability_clv(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree,
    int offset, int id_length _U_, int length)
{
    proto_item *ti;
    proto_tree *ntree = NULL;
    guint      subclvs_len;
    guint      len, i;
    guint      clv_code, clv_len;

    while (length > 0) {
        ntree = proto_tree_add_subtree(tree, tvb, offset, -1,
                ett_isis_lsp_part_of_clv_ext_is_reachability, &ti, "IS Neighbor");

        proto_tree_add_item(ntree, hf_isis_lsp_ext_is_reachability_is_neighbor_id, tvb, offset, 7, ENC_NA);
        proto_item_append_text(ti, ": %s", tvb_print_system_id(tvb, offset, 7));

        proto_tree_add_item(ntree, hf_isis_lsp_ext_is_reachability_metric, tvb, offset+7, 3, ENC_BIG_ENDIAN);

        subclvs_len = tvb_get_guint8(tvb, offset+10);
        if (subclvs_len == 0) {
            proto_tree_add_text (ntree, tvb, offset+10, 1, "no sub-TLVs present");
        }
        else {
            i = 0;
            while (i < subclvs_len) {
                clv_code = tvb_get_guint8(tvb, offset+11+i);
                clv_len  = tvb_get_guint8(tvb, offset+12+i);
                switch (clv_code) {
                case 3 :
                    dissect_subclv_admin_group(tvb, ntree, offset+13+i);
                    break;
                case 4 :
                    proto_tree_add_item(ntree, hf_isis_lsp_ext_is_reachability_link_local_identifier, tvb, offset+13+i, 4, ENC_BIG_ENDIAN);
                    proto_tree_add_item(ntree, hf_isis_lsp_ext_is_reachability_link_remote_identifier, tvb, offset+17+i, 4, ENC_BIG_ENDIAN);
                    break;
                case 6 :
                    proto_tree_add_item(ntree, hf_isis_lsp_ext_is_reachability_ipv4_interface_address, tvb, offset+11+i, 4, ENC_BIG_ENDIAN);
                    break;
                case 8 :
                    proto_tree_add_item(ntree, hf_isis_lsp_ext_is_reachability_ipv4_neighbor_address, tvb, offset+11+i, 4, ENC_BIG_ENDIAN);
                    break;
                case 9 :
                    dissect_subclv_max_bw (tvb, ntree, offset+13+i);
                    break;
                case 10:
                    dissect_subclv_rsv_bw (tvb, ntree, offset+13+i);
                    break;
                case 11:
                    dissect_subclv_unrsv_bw (tvb, ntree, offset+13+i);
                    break;
                case 18:
                    proto_tree_add_item(ntree, hf_isis_lsp_ext_is_reachability_traffic_engineering_default_metric, tvb, offset+11+i, 5, ENC_BIG_ENDIAN);
                    break;
                case 29:
                    dissect_subclv_spb_link_metric(tvb, pinfo, ntree,
                        offset+13+i, clv_code, clv_len);
                    break;
                case 250:
                case 251:
                case 252:
                case 253:
                case 254:
                    proto_tree_add_text (ntree, tvb, offset+11+i, clv_len+2,
                        "Unknown Cisco specific extensions: code %d, length %d",
                        clv_code, clv_len );
                    break;
                default :
                    proto_tree_add_text (ntree, tvb, offset+11+i, clv_len+2,
                        "Unknown sub-CLV: code %d, length %d", clv_code, clv_len );
                    break;
                }
                i += clv_len + 2;
            }
        }

        len = 11 + subclvs_len;
        proto_item_set_len (ti, len);
        offset += len;
        length -= len;
    }
}

/*
 * Name: dissect_lsp_mt_reachable_IPv4_prefx_clv()
 *
 * Description: Decode Multi-Topology IPv4 Prefixes - code 235
 *
 *
 * Input:
 *   tvbuff_t * : tvbuffer for packet data
 *   proto_tree * : protocol display tree to fill out.  May be NULL
 *   int : offset into packet data where we are.
 *   int : length of IDs in packet.
 *   int : length of clv we are decoding
 *
 * Output:
 *   void, but we will add to proto tree if !NULL.
 */
static void
dissect_lsp_mt_reachable_IPv4_prefx_clv(tvbuff_t *tvb, packet_info* pinfo,
        proto_tree *tree, int offset, int id_length _U_, int length)
{
    if (length < 2) {
        proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                "short lsp multi-topology reachable IPv4 prefixes(%d vs %d)", length, 2 );
        return;
    }
    dissect_lsp_mt_id(tvb, tree, offset);
    dissect_lsp_ext_ip_reachability_clv(tvb, pinfo, tree, offset+2, 0, length-2);
}

/*
 * Name: dissect_lsp_mt_reachable_IPv6_prefx_clv()
 *
 * Description: Decode Multi-Topology IPv6 Prefixes - code 237
 *
 *
 * Input:
 *   tvbuff_t * : tvbuffer for packet data
 *   proto_tree * : protocol display tree to fill out.  May be NULL
 *   int : offset into packet data where we are.
 *   int : length of IDs in packet.
 *   int : length of clv we are decoding
 *
 * Output:
 *   void, but we will add to proto tree if !NULL.
 */
static void
dissect_lsp_mt_reachable_IPv6_prefx_clv(tvbuff_t *tvb, packet_info* pinfo,
        proto_tree *tree, int offset, int id_length _U_, int length)
{
    if (length < 2) {
        proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                "short lsp multi-topology reachable IPv6 prefixes(%d vs %d)", length, 2 );
        return;
    }
    dissect_lsp_mt_id(tvb, tree, offset);
    dissect_lsp_ipv6_reachability_clv(tvb, pinfo, tree, offset+2, 0, length-2);
}


/*
 * Name: dissect_lsp_mt_is_reachability_clv()
 *
 * Description: Decode Multi-Topology Intermediate Systems - code 222
 *
 *
 * Input:
 *   tvbuff_t * : tvbuffer for packet data
 *   proto_tree * : protocol display tree to fill out.  May be NULL
 *   int : offset into packet data where we are.
 *   int : unused
 *   int : length of clv we are decoding
 *
 * Output:
 *   void, but we will add to proto tree if !NULL.
 */

static void
dissect_lsp_mt_is_reachability_clv(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree, int offset,
    int id_length _U_, int length)
{
    if (length < 2) {
        proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                "short lsp reachability(%d vs %d)", length, 2 );
        return;
    }

    /*
     * the MT ID value dissection is used in other LSPs so we push it
     * in a function
     */
    dissect_lsp_mt_id(tvb, tree, offset);
    /*
     * fix here. No need to parse TLV 22 (with bugs) while it is
     * already done correctly!!
     */
    dissect_lsp_ext_is_reachability_clv(tvb, pinfo, tree, offset+2, 0, length-2);
}


/*
 * Name: dissect_lsp_ori_buffersize_clv()
 *
 * Description:
 *    This CLV is used give neighbor buffer size
 *
 * Input:
 *    tvbuff_t * : tvbuffer for packet data
 *    proto_tree * : protocol display tree to fill out.  May be NULL
 *    int : offset into packet data where we are.
 *    int : length of IDs in packet.
 *    int : length of clv we are decoding
 *
 * Output:
 *      void, but we will add to proto tree if !NULL.
 */
static void
dissect_lsp_ori_buffersize_clv(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree, int offset,
    int id_length, int length)
{
    if ( length != 2 ) {
        proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                "short lsp partition DIS(%d vs %d)", length, id_length );
        return;
    }
    /*
     * Gotta build a sub-tree for all our pieces
     */
    proto_tree_add_item(tree, hf_isis_lsp_originating_lsp_buffer_size, tvb, offset, length, ENC_BIG_ENDIAN);
}


/*
 * Name: dissect_lsp_partition_dis_clv()
 *
 * Description:
 *    This CLV is used to indicate which system is the designated
 *    IS for partition repair.  This means just putting out the
 *    "id_length"-octet IS.
 *
 * Input:
 *    tvbuff_t * : tvbuffer for packet data
 *    proto_tree * : protocol display tree to fill out.  May be NULL
 *    int : offset into packet data where we are.
 *    int : length of IDs in packet.
 *    int : length of clv we are decoding
 *
 * Output:
 *      void, but we will add to proto tree if !NULL.
 */
static void
dissect_lsp_partition_dis_clv(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree, int offset,
    int id_length, int length)
{
    if ( length < id_length ) {
        proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                "short lsp partition DIS(%d vs %d)", length, id_length );
        return;
    }
    /*
     * Gotta build a sub-tree for all our pieces
     */
    proto_tree_add_item( tree, hf_isis_lsp_partition_designated_l2_is, tvb, offset, id_length, ENC_NA);

    length -= id_length;
    offset += id_length;
    if ( length > 0 ) {
        proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_long_packet, tvb, offset, -1,
                "Long lsp partition DIS, %d left over", length );
        return;
    }
}

/*
 * Name: dissect_lsp_prefix_neighbors_clv()
 *
 * Description:
 *    The prefix CLV describes what other (OSI) networks we can reach
 *    and what their cost is.  It is built from a metric block
 *    (see dissect_metric) followed by n addresses.
 *
 * Input:
 *    tvbuff_t * : tvbuffer for packet data
 *    proto_tree * : protocol display tree to fill out.  May be NULL
 *    int : offset into packet data where we are.
 *    int : length of IDs in packet.
 *    int : length of clv we are decoding
 *
 * Output:
 *      void, but we will add to proto tree if !NULL.
 */
static void
dissect_lsp_prefix_neighbors_clv(tvbuff_t *tvb, packet_info* pinfo, proto_tree *tree, int offset,
    int id_length _U_, int length)
{
    char *sbuf;
    int mylen;

    if ( length < 4 ) {
        proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
            "Short lsp prefix neighbors (%d vs 4)", length );
        return;
    }
    if ( tree ) {
        dissect_metric (tvb, tree, offset,
            tvb_get_guint8(tvb, offset), "Default", TRUE );
        dissect_metric (tvb, tree, offset+1,
            tvb_get_guint8(tvb, offset+1), "Delay", FALSE );
        dissect_metric (tvb, tree, offset+2,
            tvb_get_guint8(tvb, offset+2), "Expense", FALSE );
        dissect_metric (tvb, tree, offset+3,
            tvb_get_guint8(tvb, offset+3), "Error", FALSE );
    }
    offset += 4;
    length -= 4;
    while ( length > 0 ) {
        mylen = tvb_get_guint8(tvb, offset);
        length--;
        if (length<=0) {
            proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_short_packet, tvb, offset, -1,
                "Zero payload space after length in prefix neighbor" );
            return;
        }
        if ( mylen > length) {
            proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_long_packet, tvb, offset, -1,
                "Integral length of prefix neighbor too long (%d vs %d)", mylen, length );
            return;
        }

        /*
         * Lets turn the area address into "standard" 0000.0000.etc
         * format string.
         */
        sbuf =  print_area( tvb_get_ptr(tvb, offset+1, mylen), mylen );
        /* and spit it out */
        if ( tree ) {
            proto_tree_add_text ( tree, tvb, offset, mylen + 1,
                "Area address (%d): %s", mylen, sbuf );
        }
        offset += mylen + 1;
        length -= mylen;    /* length already adjusted for len fld*/
    }
}

static void isis_lsp_checkum_additional_info(tvbuff_t * tvb, packet_info * pinfo,
    proto_item * it_cksum, int offset, gboolean is_cksum_correct)
{
    proto_tree * checksum_tree;
    proto_item * item;

    checksum_tree = proto_item_add_subtree(it_cksum, ett_isis_lsp_cksum);
    item = proto_tree_add_boolean(checksum_tree, hf_isis_lsp_checksum_good, tvb,
                                  offset, 2, is_cksum_correct);
    PROTO_ITEM_SET_GENERATED(item);
    item = proto_tree_add_boolean(checksum_tree, hf_isis_lsp_checksum_bad, tvb,
                                  offset, 2, !is_cksum_correct);
    PROTO_ITEM_SET_GENERATED(item);
    if (!is_cksum_correct) {
        expert_add_info(pinfo, item, &ie_isis_lsp_checksum_bad);
        col_append_str(pinfo->cinfo, COL_INFO, " [ISIS CHECKSUM INCORRECT]");
    }
}

static const isis_clv_handle_t clv_l1_lsp_opts[] = {
    {
        ISIS_CLV_AREA_ADDRESS,
        "Area address(es)",
        &ett_isis_lsp_clv_area_addr,
        dissect_lsp_area_address_clv
    },
    {
        ISIS_CLV_IS_REACH,
        "IS Reachability",
        &ett_isis_lsp_clv_is_neighbors,
        dissect_lsp_l1_is_neighbors_clv
    },
    {
        ISIS_CLV_ES_NEIGHBORS,
        "ES Neighbor(s)",
        &ett_isis_lsp_clv_is_neighbors,
        dissect_lsp_l1_es_neighbors_clv
    },
    {
        ISIS_CLV_LSP_BUFFERSIZE,
        "Originating neighbor buffer size",
        &ett_isis_lsp_clv_originating_buff_size,
        dissect_lsp_ori_buffersize_clv
    },
    {
        ISIS_CLV_EXTD_IS_REACH,
        "Extended IS reachability",
        &ett_isis_lsp_clv_ext_is_reachability,
        dissect_lsp_ext_is_reachability_clv
    },
    {
        ISIS_CLV_INT_IP_REACH,
        "IP Internal reachability",
        &ett_isis_lsp_clv_ip_reachability,
        dissect_lsp_ip_reachability_clv
    },
    {
        ISIS_CLV_EXT_IP_REACH,
        "IP External reachability",
        &ett_isis_lsp_clv_ip_reachability,
        dissect_lsp_ip_reachability_clv
    },
    {
        ISIS_CLV_EXTD_IP_REACH,
        "Extended IP Reachability",
        &ett_isis_lsp_clv_ext_ip_reachability,
        dissect_lsp_ext_ip_reachability_clv
    },
    {
        ISIS_CLV_IP6_REACH,
        "IPv6 reachability",
        &ett_isis_lsp_clv_ipv6_reachability,
        dissect_lsp_ipv6_reachability_clv
    },
    {
        ISIS_CLV_PROTOCOLS_SUPPORTED,
        "Protocols supported",
        &ett_isis_lsp_clv_nlpid,
        dissect_lsp_nlpid_clv
    },
    {
        ISIS_CLV_HOSTNAME,
        "Hostname",
        &ett_isis_lsp_clv_hostname,
        dissect_lsp_hostname_clv
    },
    {
        ISIS_CLV_TE_ROUTER_ID,
        "Traffic Engineering Router ID",
        &ett_isis_lsp_clv_te_router_id,
        dissect_lsp_te_router_id_clv
    },
    {
        ISIS_CLV_IP_ADDR,
        "IP Interface address(es)",
        &ett_isis_lsp_clv_ipv4_int_addr,
        dissect_lsp_ip_int_addr_clv
    },
    {
        ISIS_CLV_IP6_ADDR,
        "IPv6 Interface address(es)",
        &ett_isis_lsp_clv_ipv6_int_addr,
        dissect_lsp_ipv6_int_addr_clv
    },
    {
        ISIS_CLV_MT_CAP,
        "MT-Capability",
        &ett_isis_lsp_clv_mt_cap,
        dissect_isis_lsp_clv_mt_cap
    },
    {
        ISIS_CLV_AUTHENTICATION,
        "Authentication",
        &ett_isis_lsp_clv_authentication,
        dissect_lsp_authentication_clv
    },
    {
        ISIS_CLV_IP_AUTHENTICATION,
        "IP Authentication",
        &ett_isis_lsp_clv_ip_authentication,
        dissect_lsp_ip_authentication_clv
    },
    {
        ISIS_CLV_MT_SUPPORTED,
        "Multi Topology supported",
        &ett_isis_lsp_clv_mt,
        dissect_lsp_mt_clv
    },
    {
        ISIS_CLV_MT_IS_REACH,
        "Multi Topology IS Reachability",
        &ett_isis_lsp_clv_mt_is,
        dissect_lsp_mt_is_reachability_clv
    },
    {
        ISIS_CLV_MT_IP_REACH,
        "Multi Topology Reachable IPv4 Prefixes",
        &ett_isis_lsp_clv_mt_reachable_IPv4_prefx,
        dissect_lsp_mt_reachable_IPv4_prefx_clv
    },
    {
        ISIS_CLV_MT_IP6_REACH,
        "Multi Topology Reachable IPv6 Prefixes",
        &ett_isis_lsp_clv_mt_reachable_IPv6_prefx,
        dissect_lsp_mt_reachable_IPv6_prefx_clv
    },
    {
        ISIS_CLV_RT_CAPABLE,
        "Router Capability",
        &ett_isis_lsp_clv_rt_capable,
        dissect_isis_rt_capable_clv
    },
    {
        ISIS_GRP_ADDR,
        "Group Address",
        &ett_isis_lsp_clv_grp_address,
        dissect_isis_grp_address_clv
    },
    {
        0,
        "",
        NULL,
        NULL
    }
};

static const isis_clv_handle_t clv_l2_lsp_opts[] = {
    {
        ISIS_CLV_AREA_ADDRESS,
        "Area address(es)",
        &ett_isis_lsp_clv_area_addr,
        dissect_lsp_area_address_clv
    },
    {
        ISIS_CLV_IS_REACH,
        "IS Reachability",
        &ett_isis_lsp_clv_is_neighbors,
        dissect_lsp_l2_is_neighbors_clv
    },
    {
        ISIS_CLV_EXTD_IS_REACH,
        "Extended IS reachability",
        &ett_isis_lsp_clv_ext_is_reachability,
        dissect_lsp_ext_is_reachability_clv
    },
    {
        ISIS_CLV_PARTITION_DIS,
        "Partition Designated Level 2 IS",
        &ett_isis_lsp_clv_partition_dis,
        dissect_lsp_partition_dis_clv
    },
    {
        ISIS_CLV_PREFIX_NEIGHBORS,
        "Prefix neighbors",
        &ett_isis_lsp_clv_prefix_neighbors,
        dissect_lsp_prefix_neighbors_clv
    },
    {
        ISIS_CLV_LSP_BUFFERSIZE,
        "Originating neighbor buffer size",
        &ett_isis_lsp_clv_originating_buff_size,
        dissect_lsp_ori_buffersize_clv
    },
    {
        ISIS_CLV_INT_IP_REACH,
        "IP Internal reachability",
        &ett_isis_lsp_clv_ip_reachability,
        dissect_lsp_ip_reachability_clv
    },
    {
        ISIS_CLV_EXT_IP_REACH,
        "IP External reachability",
        &ett_isis_lsp_clv_ip_reachability,
        dissect_lsp_ip_reachability_clv
    },
    {
        ISIS_CLV_PROTOCOLS_SUPPORTED,
        "Protocols supported",
        &ett_isis_lsp_clv_nlpid,
        dissect_lsp_nlpid_clv
    },
    {
        ISIS_CLV_HOSTNAME,
        "Hostname",
        &ett_isis_lsp_clv_hostname,
        dissect_lsp_hostname_clv
    },
    {
        ISIS_CLV_TE_ROUTER_ID,
        "Traffic Engineering Router ID",
        &ett_isis_lsp_clv_te_router_id,
        dissect_lsp_te_router_id_clv
    },
    {
        ISIS_CLV_EXTD_IP_REACH,
        "Extended IP Reachability",
        &ett_isis_lsp_clv_ext_ip_reachability,
        dissect_lsp_ext_ip_reachability_clv
    },
    {
        ISIS_CLV_IP6_REACH,
        "IPv6 reachability",
        &ett_isis_lsp_clv_ipv6_reachability,
        dissect_lsp_ipv6_reachability_clv
    },
    {
        ISIS_CLV_IP_ADDR,
        "IP Interface address(es)",
        &ett_isis_lsp_clv_ipv4_int_addr,
        dissect_lsp_ip_int_addr_clv
    },
    {
        ISIS_CLV_IP6_ADDR,
        "IPv6 Interface address(es)",
        &ett_isis_lsp_clv_ipv6_int_addr,
        dissect_lsp_ipv6_int_addr_clv
    },
    {
        ISIS_CLV_MT_CAP,
        "MT-Capability",
        &ett_isis_lsp_clv_mt_cap,
        dissect_isis_lsp_clv_mt_cap
    },
    {
        ISIS_CLV_AUTHENTICATION,
        "Authentication",
        &ett_isis_lsp_clv_authentication,
        dissect_lsp_authentication_clv
    },
    {
        ISIS_CLV_IP_AUTHENTICATION,
        "IP Authentication",
        &ett_isis_lsp_clv_ip_authentication,
        dissect_lsp_ip_authentication_clv
    },
    {
        ISIS_CLV_MT_SUPPORTED,
        "Multi Topology",
        &ett_isis_lsp_clv_mt,
        dissect_lsp_mt_clv
    },
    {
        ISIS_CLV_MT_IS_REACH,
        "Multi Topology IS Reachability",
        &ett_isis_lsp_clv_mt_is,
        dissect_lsp_mt_is_reachability_clv
    },
    {
        ISIS_CLV_MT_IP_REACH,
        "Multi Topology Reachable IPv4 Prefixes",
        &ett_isis_lsp_clv_mt_reachable_IPv4_prefx,
        dissect_lsp_mt_reachable_IPv4_prefx_clv
    },
    {
        ISIS_CLV_MT_IP6_REACH,
        "Multi Topology Reachable IPv6 Prefixes",
        &ett_isis_lsp_clv_mt_reachable_IPv6_prefx,
        dissect_lsp_mt_reachable_IPv6_prefx_clv
    },
    {
        ISIS_CLV_RT_CAPABLE,
        "Router Capability",
        &ett_isis_lsp_clv_rt_capable,
        dissect_isis_rt_capable_clv
    },
    {
        0,
        "",
        NULL,
        NULL
    }
};

/*
 * Name: isis_dissect_isis_lsp()
 *
 * Description:
 *    Print out the LSP part of the main header and then call the CLV
 *    de-mangler with the right list of valid CLVs.
 *
 * Input:
 *    tvbuff_t * : tvbuffer for packet data
 *    proto_tree * : protocol display tree to add to.  May be NULL.
 *    int offset : our offset into packet data.
 *    int : LSP type, a la packet-isis.h ISIS_TYPE_* values
 *    int : header length of packet.
 *    int : length of IDs in packet.
 *
 * Output:
 *      void, but we will add to proto tree if !NULL.
 */
static void
dissect_isis_lsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset,
    const isis_clv_handle_t *opts, int header_length, int id_length)
{
    proto_item    *ti, *ta;
    proto_tree    *lsp_tree, *info_tree, *att_tree;
    guint16        pdu_length, lifetime, checksum, cacl_checksum=0;
    guint8        lsp_info;
    int        len, offset_checksum;
    proto_item    *it_cksum;
    char* system_id;

    col_set_str(pinfo->cinfo, COL_PROTOCOL, "ISIS LSP");

    ti = proto_tree_add_item(tree, proto_isis_lsp, tvb, offset, -1, ENC_NA);
    lsp_tree = proto_item_add_subtree(ti, ett_isis_lsp);

    pdu_length = tvb_get_ntohs(tvb, offset);
    proto_tree_add_uint(lsp_tree, hf_isis_lsp_pdu_length, tvb,
            offset, 2, pdu_length);
    offset += 2;

    proto_tree_add_item(lsp_tree, hf_isis_lsp_remaining_life,
            tvb, offset, 2, ENC_BIG_ENDIAN);

    lifetime = tvb_get_ntohs(tvb, offset);
    offset += 2;
    offset_checksum = offset;

    proto_tree_add_item(lsp_tree, hf_isis_lsp_lsp_id, tvb, offset, id_length + 2, ENC_NA);
    system_id = tvb_print_system_id( tvb, offset, id_length+2 );
    col_append_fstr(pinfo->cinfo, COL_INFO, ", LSP-ID: %s", system_id);

    offset += (id_length + 2);

    proto_tree_add_item(lsp_tree, hf_isis_lsp_sequence_number,
            tvb, offset, 4, ENC_BIG_ENDIAN);

    col_append_fstr(pinfo->cinfo, COL_INFO, ", Sequence: 0x%08x, Lifetime: %5us",
            tvb_get_ntohl(tvb, offset),
            tvb_get_ntohs(tvb, offset - (id_length+2+2)));

    offset += 4;

    checksum = lifetime ? tvb_get_ntohs(tvb, offset) : 0;
    switch (check_and_get_checksum(tvb, offset_checksum, pdu_length-12, checksum, offset, &cacl_checksum)) {
        case NO_CKSUM :
            checksum = tvb_get_ntohs(tvb, offset);
            proto_tree_add_uint_format_value(lsp_tree, hf_isis_lsp_checksum, tvb, offset, 2, checksum,
                    "0x%04x [unused]", checksum);
        break;
        case DATA_MISSING :
            proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_long_packet, tvb, offset, -1,
                    "Packet length %d went beyond packet",
                     tvb_reported_length_remaining(tvb, offset_checksum));
        break;
        case CKSUM_NOT_OK :
            it_cksum = proto_tree_add_uint_format_value(lsp_tree, hf_isis_lsp_checksum, tvb, offset, 2, checksum,
                    "0x%04x [incorrect, should be 0x%04x]",
                    checksum, cacl_checksum);
            isis_lsp_checkum_additional_info(tvb, pinfo, it_cksum, offset, FALSE);
        break;
        case CKSUM_OK :
            it_cksum = proto_tree_add_uint_format_value(lsp_tree, hf_isis_lsp_checksum, tvb, offset, 2, checksum,
                    "0x%04x [correct]", checksum);
                isis_lsp_checkum_additional_info(tvb, pinfo, it_cksum, offset, TRUE);
        break;
    }
    offset += 2;

    if (tree) {
        /*
         * P | ATT | HIPPITY | IS TYPE description.
         */
        lsp_info = tvb_get_guint8(tvb, offset);
        info_tree = proto_tree_add_subtree_format(lsp_tree, tvb, offset, 1, ett_isis_lsp_info, NULL,
            "Type block(0x%02x): Partition Repair:%d, Attached bits:%d, Overload bit:%d, IS type:%d",
            lsp_info,
            ISIS_LSP_PARTITION(lsp_info),
            ISIS_LSP_ATT(lsp_info),
            ISIS_LSP_HIPPITY(lsp_info),
            ISIS_LSP_IS_TYPE(lsp_info)
            );

        proto_tree_add_boolean(info_tree, hf_isis_lsp_p, tvb, offset, 1, lsp_info);
        ta = proto_tree_add_uint(info_tree, hf_isis_lsp_att, tvb, offset, 1, lsp_info);
        att_tree = proto_item_add_subtree(ta, ett_isis_lsp_att);
        proto_tree_add_item(att_tree, hf_isis_lsp_error_metric, tvb, offset, 1, ENC_NA);
        proto_tree_add_item(att_tree, hf_isis_lsp_expense_metric, tvb, offset, 1, ENC_NA);
        proto_tree_add_item(att_tree, hf_isis_lsp_delay_metric, tvb, offset, 1, ENC_NA);
        proto_tree_add_item(att_tree, hf_isis_lsp_default_metric, tvb, offset, 1, ENC_NA);
        proto_tree_add_boolean(info_tree, hf_isis_lsp_hippity, tvb, offset, 1, lsp_info);
        proto_tree_add_uint(info_tree, hf_isis_lsp_is_type, tvb, offset, 1, lsp_info);
    }
    offset += 1;

    len = pdu_length - header_length;
    if (len < 0) {
        proto_tree_add_expert_format(tree, pinfo, &ei_isis_lsp_long_packet, tvb, offset, -1,
            "packet header length %d went beyond packet",
             header_length );
        return;
    }
    /*
     * Now, we need to decode our CLVs.  We need to pass in
     * our list of valid ones!
     */
    isis_dissect_clvs(tvb, pinfo, lsp_tree, offset,
            opts, &ei_isis_lsp_short_packet, len, id_length, ett_isis_lsp_clv_unknown, hf_isis_lsp_clv_type, hf_isis_lsp_clv_length );
}

static int
dissect_isis_l1_lsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
{
    isis_data_t* isis = (isis_data_t*)data;
    dissect_isis_lsp(tvb, pinfo, tree, 0,
        clv_l1_lsp_opts, isis->header_length, isis->system_id_len);
    return tvb_reported_length(tvb);
}

static int
dissect_isis_l2_lsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
{
    isis_data_t* isis = (isis_data_t*)data;
    dissect_isis_lsp(tvb, pinfo, tree, 0,
        clv_l2_lsp_opts, isis->header_length, isis->system_id_len);
    return tvb_reported_length(tvb);
}

void
proto_register_isis_lsp(void)
{
    static hf_register_info hf[] = {
        { &hf_isis_lsp_pdu_length,
            { "PDU length", "isis.lsp.pdu_length",
              FT_UINT16, BASE_DEC,
              NULL, 0x0, NULL, HFILL }
        },

        { &hf_isis_lsp_remaining_life,
            { "Remaining lifetime", "isis.lsp.remaining_life",
              FT_UINT16, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },

        { &hf_isis_lsp_lsp_id,
            { "LSP-ID", "isis.lsp.lsp_id",
              FT_SYSTEM_ID, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },

        { &hf_isis_lsp_hostname,
            { "Hostname", "isis.lsp.hostname",
              FT_STRING, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },

        { &hf_isis_lsp_sequence_number,
            { "Sequence number", "isis.lsp.sequence_number",
              FT_UINT32, BASE_HEX, NULL, 0x0,
              NULL, HFILL }
        },

        { &hf_isis_lsp_checksum,
            { "Checksum", "isis.lsp.checksum",
              FT_UINT16, BASE_HEX, NULL, 0x0,
              NULL, HFILL }
        },

        { &hf_isis_lsp_checksum_good,
            { "Good Checksum", "isis.lsp.checksum_good",
              FT_BOOLEAN, BASE_NONE, NULL, 0x0,
              "Good IS-IS LSP Checksum", HFILL }
        },

        { &hf_isis_lsp_checksum_bad,
            { "Bad Checksum", "isis.lsp.checksum_bad",
              FT_BOOLEAN, BASE_NONE, NULL, 0x0,
              "Bad IS-IS LSP Checksum", HFILL }
        },

        { &hf_isis_lsp_clv_ipv4_int_addr,
            { "IPv4 interface address", "isis.lsp.clv_ipv4_int_addr",
              FT_IPv4, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },

        { &hf_isis_lsp_clv_ipv6_int_addr,
            { "IPv6 interface address", "isis.lsp.clv_ipv6_int_addr",
              FT_IPv6, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },

        { &hf_isis_lsp_clv_te_router_id,
            { "Traffic Engineering Router ID", "isis.lsp.clv_te_router_id",
              FT_IPv4, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },

        { &hf_isis_lsp_clv_mt,
            { "MT-ID", "isis.lsp.clv_mt",
              FT_UINT16, BASE_HEX, NULL, 0x0,
              NULL, HFILL }
        },

        { &hf_isis_lsp_p,
            { "Partition Repair", "isis.lsp.partition_repair",
              FT_BOOLEAN, 8, TFS(&tfs_supported_not_supported), ISIS_LSP_PARTITION_MASK,
              "If set, this router supports the optional Partition Repair function", HFILL }
        },

        { &hf_isis_lsp_att,
            { "Attachment", "isis.lsp.att",
              FT_UINT8, BASE_DEC, NULL, ISIS_LSP_ATT_MASK,
              NULL, HFILL }
        },

        { &hf_isis_lsp_hippity,
            { "Overload bit", "isis.lsp.overload",
              FT_BOOLEAN, 8, TFS(&tfs_set_notset), ISIS_LSP_HIPPITY_MASK,
              "If set, this router will not be used by any decision process to calculate routes", HFILL }
        },

        { &hf_isis_lsp_root_id,
            { "Root Bridge ID", "isis.lsp.root.id",
              FT_SYSTEM_ID, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },

        { &hf_isis_lsp_is_type,
            { "Type of Intermediate System", "isis.lsp.is_type",
              FT_UINT8, BASE_DEC, VALS(isis_lsp_istype_vals), ISIS_LSP_IS_TYPE_MASK,
              NULL, HFILL }
        },

        { &hf_isis_lsp_clv_type,
            { "Type", "isis.lsp.clv.type",
              FT_UINT8, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },

        { &hf_isis_lsp_clv_length,
            { "Length", "isis.lsp.clv.length",
              FT_UINT8, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },

        { &hf_isis_lsp_spb_link_metric,
            { "SPB Link Metric", "isis.lsp.spb.link_metric",
              FT_UINT24, BASE_HEX_DEC, NULL, 0,
              NULL, HFILL }
        },

        { &hf_isis_lsp_spb_port_count,
            { "Number of Ports", "isis.lsp.spb.port_count",
              FT_UINT8, BASE_DEC, NULL, 0,
              NULL, HFILL }
        },

        { &hf_isis_lsp_spb_port_id,
            { "Port Id", "isis.lsp.spb.port_id",
              FT_UINT16, BASE_HEX_DEC, NULL, 0,
              NULL, HFILL }
        },

        { &hf_isis_lsp_spb_sr_bit,
            { "SR Bit", "isis.lsp.spb.sr_bit",
              FT_UINT8, BASE_DEC, NULL, 0,
              NULL, HFILL }
        },

        { &hf_isis_lsp_spb_spvid,
            { "SPVID", "isis.lsp.spb.spvid",
              FT_UINT16, BASE_HEX_DEC, NULL, 0,
              NULL, HFILL }
        },

      /* Generated from convert_proto_tree_add_text.pl */
        { &hf_isis_lsp_mt_id_reserved,
            { "Reserved", "isis.lsp.reserved",
              FT_UINT16, BASE_HEX, NULL, ISIS_LSP_MT_MSHIP_RES_MASK,
            NULL, HFILL }
        },
        { &hf_isis_lsp_mt_id,
            { "Topology ID", "isis.lsp.mtid",
              FT_UINT16, BASE_DEC|BASE_RANGE_STRING, RVALS(mtid_strings), 0x0fff,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ip_reachability_ipv4_prefix,
            { "IPv4 prefix", "isis.lsp.ip_reachability.ipv4_prefix",
              FT_IPv4, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ip_reachability_default_metric,
            { "Default Metric", "isis.lsp.ip_reachability.default_metric",
              FT_UINT8, BASE_DEC, NULL, 0x3F,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ip_reachability_delay_metric,
            { "Delay Metric", "isis.lsp.ip_reachability.delay_metric",
              FT_UINT8, BASE_DEC, NULL, 0x3F,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ip_reachability_expense_metric,
            { "Expense Metric", "isis.lsp.ip_reachability.expense_metric",
              FT_UINT8, BASE_DEC, NULL, 0x3F,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ip_reachability_error_metric,
            { "Error Metric", "isis.lsp.ip_reachability.error_metric",
              FT_UINT8, BASE_DEC, NULL, 0x3F,
              NULL, HFILL }
        },
        { &hf_isis_lsp_32_bit_administrative_tag,
            { "32-Bit Administrative tag", "isis.lsp.32_bit_administrative_tag",
              FT_UINT32, BASE_HEX_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_64_bit_administrative_tag,
            { "64-Bit Administrative tag", "isis.lsp.64_bit_administrative_tag",
              FT_UINT64, BASE_HEX, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ext_ip_reachability_ipv4_prefix,
            { "IPv4 prefix", "isis.lsp.ext_ip_reachability.ipv4_prefix",
              FT_IPv4, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ext_ip_reachability_metric,
            { "Metric", "isis.lsp.ext_ip_reachability.metric",
              FT_UINT32, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ext_ip_reachability_distribution,
            { "Distribution", "isis.lsp.ext_ip_reachability.distribution",
              FT_BOOLEAN, 8, TFS(&tfs_up_down), 0x80,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_macaddr_length,
            { "Length", "isis.lsp.grp_macaddr.length",
              FT_UINT8, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_macaddr_topology_id,
            { "Topology ID", "isis.lsp.grp_macaddr.mtid",
              FT_UINT16, BASE_DEC|BASE_RANGE_STRING, RVALS(mtid_strings), 0x0fff,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_macaddr_vlan_id,
            { "VLAN ID", "isis.lsp.grp_macaddr.vlan_id",
              FT_UINT16, BASE_DEC, NULL, 0x0fff,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_macaddr_number_of_records,
            { "Number of records", "isis.lsp.grp_macaddr.number_of_records",
              FT_UINT8, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_macaddr_number_of_sources,
            { "Number of sources", "isis.lsp.grp_macaddr.number_of_sources",
              FT_UINT8, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_macaddr_group_address,
            { "Group Address", "isis.lsp.grp_macaddr.group_address",
              FT_SYSTEM_ID, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_macaddr_source_address,
            { "Source Address", "isis.lsp.grp_macaddr.source_address",
              FT_SYSTEM_ID, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_ipv4addr_length,
            { "Length", "isis.lsp.grp_ipv4addr.length",
              FT_UINT8, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_ipv4addr_topology_id,
            { "Topology ID", "isis.lsp.grp_ipv4addr.mtid",
              FT_UINT16, BASE_DEC|BASE_RANGE_STRING, RVALS(mtid_strings), 0x0fff,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_ipv4addr_vlan_id,
            { "VLAN ID", "isis.lsp.grp_ipv4addr.vlan_id",
              FT_UINT16, BASE_DEC, NULL, 0x0fff,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_ipv4addr_number_of_records,
            { "Number of records", "isis.lsp.grp_ipv4addr.number_of_records",
              FT_UINT8, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_ipv4addr_number_of_sources,
            { "Number of sources", "isis.lsp.grp_ipv4addr.number_of_sources",
              FT_UINT8, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_ipv4addr_group_address,
            { "Group Address", "isis.lsp.grp_ipv4addr.group_address",
              FT_IPv4, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_ipv4addr_source_address,
            { "Source Address", "isis.lsp.grp_ipv4addr.source_address",
              FT_IPv4, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_ipv6addr_length,
            { "Length", "isis.lsp.grp_ipv6addr.length",
              FT_UINT8, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_ipv6addr_topology_id,
            { "Topology ID", "isis.lsp.grp_ipv6addr.mtid",
              FT_UINT16, BASE_DEC|BASE_RANGE_STRING, RVALS(mtid_strings), 0x0fff,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_ipv6addr_vlan_id,
            { "VLAN ID", "isis.lsp.grp_ipv6addr.vlan_id",
              FT_UINT16, BASE_DEC, NULL, 0x0fff,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_ipv6addr_number_of_records,
            { "Number of records", "isis.lsp.grp_ipv6addr.number_of_records",
              FT_UINT8, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_ipv6addr_number_of_sources,
            { "Number of sources", "isis.lsp.grp_ipv6addr.number_of_sources",
              FT_UINT8, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_ipv6addr_group_address,
            { "Group Address", "isis.lsp.grp_ipv6addr.group_address",
              FT_IPv6, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_grp_ipv6addr_source_address,
            { "Source Address", "isis.lsp.grp_ipv6addr.source_address",
              FT_IPv6, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_trill_affinity_tlv,
            { "Affinity Sub-TLV", "isis.lsp.rt_capable.trill.affinity_tlv",
              FT_BOOLEAN, 32 , TFS(&tfs_supported_not_supported), 0x80000000,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_trill_fgl_safe,
            { "FGL-safe", "isis.lsp.rt_capable.trill.fgl_safe",
              FT_BOOLEAN, 32 , TFS(&tfs_yes_no), 0x40000000,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_trill_caps,
            { "Other Capabilities", "isis.lsp.rt_capable.trill.caps",
              FT_BOOLEAN, 32 , TFS(&tfs_supported_not_supported), 0x3ffc0000,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_trill_flags,
            { "Extended Header Flags", "isis.lsp.rt_capable.trill.flags",
              FT_BOOLEAN, 32 , TFS(&tfs_supported_not_supported), 0x0003ffff,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_trill_maximum_version,
            { "Maximum version", "isis.lsp.rt_capable.trill.maximum_version",
              FT_UINT8, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_trees_nof_trees_to_compute,
            { "Nof. trees to compute", "isis.lsp.rt_capable.trees.nof_trees_to_compute",
              FT_UINT16, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_trees_maximum_nof_trees_to_compute,
            { "Maximum nof. trees to compute", "isis.lsp.rt_capable.trees.maximum_nof_trees_to_compute",
              FT_UINT16, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_trees_nof_trees_to_use,
            { "Nof. trees to use", "isis.lsp.rt_capable.trees.nof_trees_to_use",
              FT_UINT16, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_tree_root_id_starting_tree_no,
            { "Starting tree no", "isis.lsp.rt_capable.tree_root_id.starting_tree_no",
              FT_UINT16, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_tree_root_id_nickname,
            { "Nickname", "isis.lsp.rt_capable.tree_root_id.nickname",
              FT_UINT16, BASE_HEX_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_nickname_nickname_priority,
            { "Nickname priority", "isis.lsp.rt_capable.nickname.nickname_priority",
              FT_UINT8, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_nickname_tree_root_priority,
            { "Tree root priority", "isis.lsp.rt_capable.nickname.tree_root_priority",
              FT_UINT16, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_nickname_nickname,
            { "Nickname", "isis.lsp.rt_capable.nickname.nickname",
              FT_UINT16, BASE_HEX_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_interested_vlans_nickname,
            { "Nickname", "isis.lsp.rt_capable.interested_vlans.nickname",
              FT_UINT16, BASE_HEX_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_interested_vlans_multicast_ipv4,
            { "IPv4 multicast router", "isis.lsp.rt_capable.interested_vlans.multicast_ipv4",
              FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x8000,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_interested_vlans_multicast_ipv6,
            { "IPv6 multicast router", "isis.lsp.rt_capable.interested_vlans.multicast_ipv6",
              FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x4000,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_interested_vlans_vlan_start_id,
            { "Vlan start id", "isis.lsp.rt_capable.interested_vlans.vlan_start_id",
              FT_UINT16, BASE_DEC, NULL, 0x0fff,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_interested_vlans_vlan_end_id,
            { "Vlan end id", "isis.lsp.rt_capable.interested_vlans.vlan_end_id",
              FT_UINT16, BASE_DEC, NULL, 0x0fff,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_interested_vlans_afs_lost_counter,
            { "Appointed forward state lost counter", "isis.lsp.rt_capable.interested_vlans.afs_lost_counter",
              FT_UINT32, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_tree_used_id_starting_tree_no,
            { "Starting tree no", "isis.lsp.rt_capable.tree_used_id.starting_tree_no",
              FT_UINT16, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_tree_used_id_nickname,
            { "Nickname", "isis.lsp.rt_capable.tree_used_id.nickname",
              FT_UINT16, BASE_HEX_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_vlan_group_primary_vlan_id,
            { "Primary vlan id", "isis.lsp.rt_capable.vlan_group.primary_vlan_id",
              FT_UINT16, BASE_DEC, NULL, 0x0fff,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_vlan_group_secondary_vlan_id,
            { "Secondary vlan id", "isis.lsp.rt_capable.vlan_group.secondary_vlan_id",
              FT_UINT16, BASE_DEC, NULL, 0x0fff,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ipv6_reachability_ipv6_prefix,
            { "IPv6 prefix", "isis.lsp.ipv6_reachability.ipv6_prefix",
              FT_IPv6, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ipv6_reachability_metric,
            { "Metric", "isis.lsp.ipv6_reachability.metric",
              FT_UINT32, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ipv6_reachability_distribution,
            { "Distribution", "isis.lsp.ipv6_reachability.distribution",
              FT_BOOLEAN, 8, TFS(&tfs_up_down), 0x80,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ipv6_reachability_distribution_internal,
            { "Distribution", "isis.lsp.ipv6_reachability.distribution_internal",
              FT_BOOLEAN, 8, TFS(&tfs_internal_external), 0x40,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ipv6_reachability_reserved_bits,
            { "Reserved bits", "isis.lsp.ipv6_reachability.reserved_bits",
              FT_UINT8, BASE_HEX, NULL, 0x1F,
              NULL, HFILL }
        },
        { &hf_isis_lsp_mt_cap_spb_instance_cist_root_identifier,
            { "CIST Root Identifier", "isis.lsp.mt_cap_spb_instance.cist_root_identifier",
              FT_BYTES, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_mt_cap_spb_instance_cist_external_root_path_cost,
            { "CIST External Root Path Cost", "isis.lsp.mt_cap_spb_instance.cist_external_root_path_cost",
              FT_UINT32, BASE_HEX_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_mt_cap_spb_instance_bridge_priority,
            { "Bridge Priority", "isis.lsp.mt_cap_spb_instance.bridge_priority",
              FT_UINT16, BASE_HEX_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_mt_cap_spb_instance_v,
            { "V", "isis.lsp.mt_cap_spb_instance.v",
              FT_BOOLEAN, 32, NULL, 0x00100000,
              NULL, HFILL }
        },
        { &hf_isis_lsp_mt_cap_spb_instance_number_of_trees,
            { "Number of Trees", "isis.lsp.mt_cap_spb_instance.number_of_trees",
              FT_UINT16, BASE_HEX_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_mt_cap_spbm_service_identifier_b_mac,
            { "B-MAC", "isis.lsp.mt_cap_spbm_service_identifier.b_mac",
              FT_ETHER, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_mt_cap_spbm_service_identifier_base_vid,
            { "Base-VID", "isis.lsp.mt_cap_spbm_service_identifier.base_vid",
              FT_UINT16, BASE_HEX_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_mt_cap_mtid,
            { "Topology ID", "isis.lsp.mt_cap.mtid",
              FT_UINT16, BASE_DEC|BASE_RANGE_STRING, RVALS(mtid_strings), 0x0fff,
              NULL, HFILL }
        },
        { &hf_isis_lsp_eis_neighbors_reserved,
            { "Reserved", "isis.lsp.eis_neighbors_clv_inner.reserved",
              FT_UINT8, BASE_HEX, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_eis_neighbors_es_neighbor_id,
            { "ES Neighbor ID", "isis.lsp.eis_neighbors.es_neighbor_id",
              FT_SYSTEM_ID, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_eis_neighbors_is_neighbor_id,
            { "IS Neighbor", "isis.lsp.eis_neighbors.is_neighbor",
              FT_SYSTEM_ID, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_eis_neighbors_default_metric,
            { "Default Metric", "isis.lsp.eis_neighbors.default_metric",
              FT_UINT8, BASE_DEC, NULL, 0x3F,
              NULL, HFILL }
        },
        { &hf_isis_lsp_eis_neighbors_delay_metric,
            { "Delay Metric", "isis.lsp.eis_neighbors.delay_metric",
              FT_UINT8, BASE_DEC, NULL, 0x3F,
              NULL, HFILL }
        },
        { &hf_isis_lsp_eis_neighbors_expense_metric,
            { "Expense Metric", "isis.lsp.eis_neighbors.expense_metric",
              FT_UINT8, BASE_DEC, NULL, 0x3F,
              NULL, HFILL }
        },
        { &hf_isis_lsp_eis_neighbors_error_metric,
            { "Error Metric", "isis.lsp.eis_neighbors.error_metric",
              FT_UINT8, BASE_DEC, NULL, 0x3F,
              NULL, HFILL }
        },
        { &hf_isis_lsp_maximum_link_bandwidth,
            { "Maximum link bandwidth", "isis.lsp.maximum_link_bandwidth",
              FT_FLOAT, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_reservable_link_bandwidth,
            { "Reservable link bandwidth", "isis.lsp.reservable_link_bandwidth",
              FT_FLOAT, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ext_is_reachability_is_neighbor_id,
            { "IS neighbor ID", "isis.lsp.ext_is_reachability.is_neighbor_id",
              FT_SYSTEM_ID, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ext_is_reachability_metric,
            { "Metric", "isis.lsp.ext_is_reachability.metric",
              FT_UINT24, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ext_is_reachability_link_local_identifier,
            { "Link Local Identifier", "isis.lsp.ext_is_reachability.link_local_identifier",
              FT_UINT32, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ext_is_reachability_link_remote_identifier,
            { "Link Remote Identifier", "isis.lsp.ext_is_reachability.link_remote_identifier",
              FT_UINT32, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ext_is_reachability_ipv4_interface_address,
            { "IPv4 interface address", "isis.lsp.ext_is_reachability.ipv4_interface_address",
              FT_IPv4, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ext_is_reachability_ipv4_neighbor_address,
            { "IPv4 neighbor address", "isis.lsp.ext_is_reachability.ipv4_neighbor_address",
              FT_IPv4, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ext_is_reachability_traffic_engineering_default_metric,
            { "Traffic engineering default metric", "isis.lsp.ext_is_reachability.traffic_engineering_default_metric",
              FT_UINT24, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_partition_designated_l2_is,
            { "Partition designated L2 IS", "isis.lsp.partition_designated_l2_is",
              FT_SYSTEM_ID, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_originating_lsp_buffer_size,
            { "Neighbor originating buffer size", "isis.lsp.originating_lsp_buffer_size",
              FT_UINT16, BASE_DEC, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_error_metric,
            { "Error metric", "isis.lsp.error_metric",
              FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x08,
              NULL, HFILL }
        },
        { &hf_isis_lsp_expense_metric,
            { "Expense metric", "isis.lsp.expense_metric",
              FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x04,
              NULL, HFILL }
        },
        { &hf_isis_lsp_delay_metric,
            { "Delay metric", "isis.lsp.delay_metric",
              FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x02,
              NULL, HFILL }
        },
        { &hf_isis_lsp_default_metric,
            { "Default metric", "isis.lsp.default_metric",
              FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x01,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ip_reachability_default_metric_ie,
            { "Default Metric IE", "isis.lsp.ip_reachability.default_metric_ie",
              FT_BOOLEAN, 8, TFS(&tfs_external_internal), 0x40,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ip_reachability_delay_metric_support,
            { "Delay Metric", "isis.lsp.ip_reachability.delay_metric_support",
              FT_BOOLEAN, 8, TFS(&tfs_notsupported_supported), 0x80,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ip_reachability_expense_metric_support,
            { "Expense Metric", "isis.lsp.ip_reachability.expense_metric_support",
              FT_BOOLEAN, 8, TFS(&tfs_notsupported_supported), 0x80,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ip_reachability_error_metric_support,
            { "Error Metric", "isis.lsp.ip_reachability.error_metric_support",
              FT_BOOLEAN, 8, TFS(&tfs_notsupported_supported), 0x80,
              NULL, HFILL }
        },
        { &hf_isis_lsp_mt_cap_spsourceid,
            { "SPSourceId", "isis.lsp.mt_cap.spsourceid",
              FT_UINT32, BASE_HEX_DEC, NULL, 0xfffff,
              NULL, HFILL }
        },
        { &hf_isis_lsp_mt_cap_overload,
            { "Overload", "isis.lsp.overload",
              FT_BOOLEAN, 16, NULL, 0x8000,
              NULL, HFILL }
        },
        { &hf_isis_lsp_eis_neighbors_default_metric_ie,
            { "Default Metric", "isis.lsp.eis_neighbors.default_metric_ie",
              FT_BOOLEAN, 8, TFS(&tfs_external_internal), 0x40,
              NULL, HFILL }
        },
        { &hf_isis_lsp_eis_neighbors_delay_metric_supported,
            { "Delay Metric", "isis.lsp.eis_neighbors_delay_metric.supported",
              FT_BOOLEAN, 8, TFS(&tfs_notsupported_supported), 0x80,
              NULL, HFILL }
        },
        { &hf_isis_lsp_eis_neighbors_expense_metric_supported,
            { "Expense Metric", "isis.lsp.eis_neighbors.expense_metric_supported",
              FT_BOOLEAN, 8, TFS(&tfs_notsupported_supported), 0x80,
              NULL, HFILL }
        },
        { &hf_isis_lsp_eis_neighbors_error_metric_supported,
            { "Error Metric", "isis.lsp.eis_neighbors.error_metric_supported",
              FT_BOOLEAN, 8, TFS(&tfs_notsupported_supported), 0x80,
              NULL, HFILL }
        },
        { &hf_isis_lsp_unrsv_bw_priority_level,
            { "priority level", "isis.lsp.unrsv_bw.priority_level",
              FT_FLOAT, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ip_reachability_distribution,
            { "Distribution", "isis.lsp.ip_reachability.distribution",
              FT_BOOLEAN, 8, TFS(&tfs_up_down), 0x80,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ip_reachability_delay_metric_ie,
            { "Delay Metric", "isis.lsp.ip_reachability.delay_metric_ie",
              FT_BOOLEAN, 8, TFS(&tfs_external_internal), 0x40,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ip_reachability_expense_metric_ie,
            { "Expense Metric", "isis.lsp.ip_reachability.expense_metric_ie",
              FT_BOOLEAN, 8, TFS(&tfs_external_internal), 0x40,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ip_reachability_error_metric_ie,
            { "Error Metric", "isis.lsp.ip_reachability.error_metric_ie",
              FT_BOOLEAN, 8, TFS(&tfs_external_internal), 0x40,
              NULL, HFILL }
        },
        { &hf_isis_lsp_eis_neighbors_delay_metric_ie,
            { "Delay Metric", "isis.lsp.eis_neighbors.delay_metric_ie",
              FT_BOOLEAN, 8, TFS(&tfs_external_internal), 0x40,
              NULL, HFILL }
        },
        { &hf_isis_lsp_eis_neighbors_expense_metric_ie,
            { "Expense Metric", "isis.lsp.eis_neighbors.expense_metric_ie",
              FT_BOOLEAN, 8, TFS(&tfs_external_internal), 0x40,
              NULL, HFILL }
        },
        { &hf_isis_lsp_eis_neighbors_error_metric_ie,
            { "Error Metric", "isis.lsp.eis_neighbors.error_metric_ie",
              FT_BOOLEAN, 8, TFS(&tfs_external_internal), 0x40,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_router_id,
            { "Router ID", "isis.lsp.rt_capable.router_id",
              FT_UINT32, BASE_HEX, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_flag_s,
            { "S bit", "isis.lsp.rt_capable.flag_s",
              FT_BOOLEAN, 8, NULL, 0x01,
              NULL, HFILL }
        },
        { &hf_isis_lsp_rt_capable_flag_d,
            { "D bit", "isis.lsp.rt_capable.flag_d",
              FT_BOOLEAN, 8, NULL, 0x02,
              NULL, HFILL }
        },
        { &hf_isis_lsp_clv_te_node_cap_b_bit,
            { "B bit: P2MP Branch LSR capability", "isis.lsp.te_node_cap.b_bit",
              FT_BOOLEAN, 8, NULL, 0x80,
              NULL, HFILL }
        },
        { &hf_isis_lsp_clv_te_node_cap_e_bit,
            { "E bit: P2MP Bud LSR capability", "isis.lsp.te_node_cap.e_bit",
              FT_BOOLEAN, 8, NULL, 0x40,
              NULL, HFILL }
        },
        { &hf_isis_lsp_clv_te_node_cap_m_bit,
            { "M bit: MPLS-TE support", "isis.lsp.te_node_cap.m_bit",
              FT_BOOLEAN, 8, NULL, 0x20,
              NULL, HFILL }
        },
        { &hf_isis_lsp_clv_te_node_cap_g_bit,
            { "G bit: GMPLS support", "isis.lsp.te_node_cap.g_bit",
              FT_BOOLEAN, 8, NULL, 0x10,
              NULL, HFILL }
        },
        { &hf_isis_lsp_clv_te_node_cap_p_bit,
            { "P bit: P2MP RSVP-TE support", "isis.lsp.te_node_cap.p_bit",
              FT_BOOLEAN, 8, NULL, 0x08,
              NULL, HFILL }
        },
        { &hf_isis_lsp_area_address,
            { "Area address", "isis.lsp.area_address",
              FT_BYTES, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_clv_nlpid,
            { "NLPID", "isis.lsp.clv_nlpid",
              FT_BYTES, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_ip_authentication,
            { "IP Authentication", "isis.lsp.ip_authentication",
              FT_STRING, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
        { &hf_isis_lsp_authentication,
            { "Authentication", "isis.lsp.authentication",
              FT_BYTES, BASE_NONE, NULL, 0x0,
              NULL, HFILL }
        },
    };
    static gint *ett[] = {
        &ett_isis_lsp,
        &ett_isis_lsp_info,
        &ett_isis_lsp_att,
        &ett_isis_lsp_cksum,
        &ett_isis_lsp_clv_area_addr,
        &ett_isis_lsp_clv_is_neighbors,
        &ett_isis_lsp_clv_ext_is_reachability, /* CLV 22 */
        &ett_isis_lsp_part_of_clv_ext_is_reachability,
        &ett_isis_lsp_subclv_admin_group,
        &ett_isis_lsp_subclv_unrsv_bw,
        &ett_isis_lsp_subclv_spb_link_metric,
        &ett_isis_lsp_clv_unknown,
        &ett_isis_lsp_clv_partition_dis,
        &ett_isis_lsp_clv_prefix_neighbors,
        &ett_isis_lsp_clv_authentication,
        &ett_isis_lsp_clv_ip_authentication,
        &ett_isis_lsp_clv_nlpid,
        &ett_isis_lsp_clv_hostname,
        &ett_isis_lsp_clv_ipv4_int_addr,
        &ett_isis_lsp_clv_ipv6_int_addr, /* CLV 232 */
        &ett_isis_lsp_clv_mt_cap,
        &ett_isis_lsp_clv_mt_cap_spb_instance,
        &ett_isis_lsp_clv_mt_cap_spbm_service_identifier,
        &ett_isis_lsp_clv_mt_cap_spbv_mac_address,
        &ett_isis_lsp_clv_te_router_id,
        &ett_isis_lsp_clv_ip_reachability,
        &ett_isis_lsp_clv_ip_reach_subclv,
        &ett_isis_lsp_clv_ext_ip_reachability, /* CLV 135 */
        &ett_isis_lsp_part_of_clv_ext_ip_reachability,
        &ett_isis_lsp_clv_ipv6_reachability, /* CLV 236 */
        &ett_isis_lsp_part_of_clv_ipv6_reachability,
        &ett_isis_lsp_clv_mt,
        &ett_isis_lsp_clv_mt_is,
        &ett_isis_lsp_part_of_clv_mt_is,
        &ett_isis_lsp_clv_rt_capable, /*CLV 242*/
        &ett_isis_lsp_clv_te_node_cap_desc,
        &ett_isis_lsp_clv_trill_version,
        &ett_isis_lsp_clv_trees,
        &ett_isis_lsp_clv_root_id,
        &ett_isis_lsp_clv_nickname,
        &ett_isis_lsp_clv_interested_vlans,
        &ett_isis_lsp_clv_tree_used,
        &ett_isis_lsp_clv_vlan_group,
        &ett_isis_lsp_clv_grp_address, /*CLV 142*/
        &ett_isis_lsp_clv_grp_macaddr,
        &ett_isis_lsp_clv_grp_ipv4addr,
        &ett_isis_lsp_clv_grp_ipv6addr,
        &ett_isis_lsp_clv_mt_reachable_IPv4_prefx,
        &ett_isis_lsp_clv_mt_reachable_IPv6_prefx,
        &ett_isis_lsp_clv_originating_buff_size /* CLV 14 */
    };

    static ei_register_info ei[] = {
        { &ie_isis_lsp_checksum_bad, { "isis.lsp.checksum_bad.expert", PI_CHECKSUM, PI_ERROR, "Bad checksum", EXPFILL }},
        { &ei_isis_lsp_short_packet, { "isis.lsp.short_packet", PI_MALFORMED, PI_ERROR, "Short packet", EXPFILL }},
        { &ei_isis_lsp_long_packet, { "isis.lsp.long_packet", PI_MALFORMED, PI_ERROR, "Long packet", EXPFILL }},
        { &ei_isis_lsp_subtlv, { "isis.lsp.subtlv.unknown", PI_PROTOCOL, PI_WARN, "Unknown SubTLV", EXPFILL }},
        { &ei_isis_lsp_authentication, { "isis.lsp.authentication.unknown", PI_PROTOCOL, PI_WARN, "Unknown authentication type", EXPFILL }},
        { &ei_isis_lsp_clv_mt, { "isis.lsp.clv_mt.malformed", PI_MALFORMED, PI_ERROR, "malformed MT-ID", EXPFILL }},
    };

    expert_module_t* expert_isis_lsp;

    /* Register the protocol name and description */
    proto_isis_lsp = proto_register_protocol(PROTO_STRING_LSP, "ISIS LSP", "isis.lsp");

    proto_register_field_array(proto_isis_lsp, hf, array_length(hf));
    proto_register_subtree_array(ett, array_length(ett));
    expert_isis_lsp = expert_register_protocol(proto_isis_lsp);
    expert_register_field_array(expert_isis_lsp, ei, array_length(ei));
}

void
proto_reg_handoff_isis_lsp(void)
{
    dissector_add_uint("isis.type", ISIS_TYPE_L1_LSP, new_create_dissector_handle(dissect_isis_l1_lsp, proto_isis_lsp));
    dissector_add_uint("isis.type", ISIS_TYPE_L2_LSP, new_create_dissector_handle(dissect_isis_l2_lsp, proto_isis_lsp));
}

/*
 * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 *
 * Local variables:
 * c-basic-offset: 4
 * tab-width: 8
 * indent-tabs-mode: nil
 * End:
 *
 * vi: set shiftwidth=4 tabstop=8 expandtab:
 * :indentSize=4:tabSize=8:noTabs=true:
 */