path: root/isisd/isis_te.c

/*
 * IS-IS Rout(e)ing protocol - isis_te.c
 *
 * This is an implementation of RFC5305 & RFC 7810
 *
 *      Copyright (C) 2014 Orange Labs
 *      http://www.orange.com
 *
 * This file is part of GNU Zebra.
 *
 * GNU Zebra 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, or (at your option) any
 * later version.
 *
 * GNU Zebra 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; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <zebra.h>
#include <math.h>

#include "linklist.h"
#include "thread.h"
#include "vty.h"
#include "stream.h"
#include "memory.h"
#include "log.h"
#include "prefix.h"
#include "command.h"
#include "hash.h"
#include "if.h"
#include "vrf.h"
#include "checksum.h"
#include "md5.h"
#include "sockunion.h"
#include "network.h"

#include "isisd/dict.h"
#include "isisd/isis_constants.h"
#include "isisd/isis_common.h"
#include "isisd/isis_flags.h"
#include "isisd/isis_circuit.h"
#include "isisd/isisd.h"
#include "isisd/isis_tlv.h"
#include "isisd/isis_lsp.h"
#include "isisd/isis_pdu.h"
#include "isisd/isis_dynhn.h"
#include "isisd/isis_misc.h"
#include "isisd/isis_csm.h"
#include "isisd/isis_adjacency.h"
#include "isisd/isis_spf.h"
#include "isisd/isis_te.h"

/* Global varial for MPLS TE management */
struct isis_mpls_te isisMplsTE;

const char *mode2text[] = { "Disable", "Area", "AS", "Emulate" };

/*------------------------------------------------------------------------*
 * Followings are control functions for MPLS-TE parameters management.
 *------------------------------------------------------------------------*/

/* Search MPLS TE Circuit context from Interface */
static struct mpls_te_circuit *
lookup_mpls_params_by_ifp (struct interface *ifp)
{
  struct isis_circuit *circuit;

  if ((circuit = circuit_scan_by_ifp (ifp)) == NULL)
      return NULL;

  return circuit->mtc;
}

/* Create new MPLS TE Circuit context */
struct mpls_te_circuit *
mpls_te_circuit_new()
{
  struct mpls_te_circuit *mtc;

  zlog_debug ("ISIS MPLS-TE: Create new MPLS TE Circuit context");

  mtc = XCALLOC(MTYPE_ISIS_MPLS_TE, sizeof (struct mpls_te_circuit));

  if (mtc == NULL)
    return NULL;

  mtc->status = disable;
  mtc->type = STD_TE;
  mtc->length = 0;

  return mtc;

}

/* Copy SUB TLVs parameters into a buffer - No space verification are performed */
/* Caller must verify before that there is enough free space in the buffer */
u_char
add_te_subtlvs(u_char *buf, struct mpls_te_circuit *mtc)
{
  u_char size, *tlvs = buf;

  zlog_debug ("ISIS MPLS-TE: Add TE Sub TLVs to buffer");

  if (mtc == NULL)
    {
      zlog_debug("ISIS MPLS-TE: Abort! No MPLS TE Circuit available has been specified");
      return 0;
    }

  /* Create buffer if not provided */
  if (buf == NULL)
    {
      zlog_debug("ISIS MPLS-TE: Abort! No Buffer has been specified");
      return 0;
    }

  /* TE_SUBTLV_ADMIN_GRP */
  if (SUBTLV_TYPE(mtc->admin_grp) != 0)
    {
      size = SUBTLV_SIZE (&(mtc->admin_grp.header));
      memcpy(tlvs, &(mtc->admin_grp), size);
      tlvs += size;
    }

  /* TE_SUBTLV_LLRI */
  if (SUBTLV_TYPE(mtc->llri) != 0)
    {
      size = SUBTLV_SIZE (&(mtc->llri.header));
      memcpy(tlvs, &(mtc->llri), size);
      tlvs += size;
    }

  /* TE_SUBTLV_LCLIF_IPADDR */
  if (SUBTLV_TYPE(mtc->local_ipaddr) != 0)
    {
      size = SUBTLV_SIZE (&(mtc->local_ipaddr.header));
      memcpy(tlvs, &(mtc->local_ipaddr), size);
      tlvs += size;
    }

  /* TE_SUBTLV_RMTIF_IPADDR */
  if (SUBTLV_TYPE(mtc->rmt_ipaddr) != 0)
    {
      size = SUBTLV_SIZE (&(mtc->rmt_ipaddr.header));
      memcpy(tlvs, &(mtc->rmt_ipaddr), size);
      tlvs += size;
    }

  /* TE_SUBTLV_MAX_BW */
  if (SUBTLV_TYPE(mtc->max_bw) != 0)
    {
      size = SUBTLV_SIZE (&(mtc->max_bw.header));
      memcpy(tlvs, &(mtc->max_bw), size);
      tlvs += size;
    }

  /* TE_SUBTLV_MAX_RSV_BW */
  if (SUBTLV_TYPE(mtc->max_rsv_bw) != 0)
    {
      size = SUBTLV_SIZE (&(mtc->max_rsv_bw.header));
      memcpy(tlvs, &(mtc->max_rsv_bw), size);
      tlvs += size;
    }

  /* TE_SUBTLV_UNRSV_BW */
  if (SUBTLV_TYPE(mtc->unrsv_bw) != 0)
    {
      size = SUBTLV_SIZE (&(mtc->unrsv_bw.header));
      memcpy(tlvs, &(mtc->unrsv_bw), size);
      tlvs += size;
    }

  /* TE_SUBTLV_TE_METRIC */
  if (SUBTLV_TYPE(mtc->te_metric) != 0)
    {
      size = SUBTLV_SIZE (&(mtc->te_metric.header));
      memcpy(tlvs, &(mtc->te_metric), size);
      tlvs += size;
    }

  /* TE_SUBTLV_AV_DELAY */
  if (SUBTLV_TYPE(mtc->av_delay) != 0)
    {
      size = SUBTLV_SIZE (&(mtc->av_delay.header));
      memcpy(tlvs, &(mtc->av_delay), size);
      tlvs += size;
    }

  /* TE_SUBTLV_MM_DELAY */
  if (SUBTLV_TYPE(mtc->mm_delay) != 0)
    {
      size = SUBTLV_SIZE (&(mtc->mm_delay.header));
      memcpy(tlvs, &(mtc->mm_delay), size);
      tlvs += size;
    }

  /* TE_SUBTLV_DELAY_VAR */
  if (SUBTLV_TYPE(mtc->delay_var) != 0)
    {
      size = SUBTLV_SIZE (&(mtc->delay_var.header));
      memcpy(tlvs, &(mtc->delay_var), size);
      tlvs += size;
    }

  /* TE_SUBTLV_PKT_LOSS */
  if (SUBTLV_TYPE(mtc->pkt_loss) != 0)
    {
      size = SUBTLV_SIZE (&(mtc->pkt_loss.header));
      memcpy(tlvs, &(mtc->pkt_loss), size);
      tlvs += size;
    }

  /* TE_SUBTLV_RES_BW */
  if (SUBTLV_TYPE(mtc->res_bw) != 0)
    {
      size = SUBTLV_SIZE (&(mtc->res_bw.header));
      memcpy(tlvs, &(mtc->res_bw), size);
      tlvs += size;
    }

  /* TE_SUBTLV_AVA_BW */
  if (SUBTLV_TYPE(mtc->ava_bw) != 0)
    {
      size = SUBTLV_SIZE (&(mtc->ava_bw.header));
      memcpy(tlvs, &(mtc->ava_bw), size);
      tlvs += size;
    }

  /* TE_SUBTLV_USE_BW */
  if (SUBTLV_TYPE(mtc->use_bw) != 0)
    {
      size = SUBTLV_SIZE (&(mtc->use_bw.header));
      memcpy(tlvs, &(mtc->use_bw), size);
      tlvs += size;
    }

  /* Update SubTLVs length */
  mtc->length = subtlvs_len(mtc);

  zlog_debug("ISIS MPLS-TE: Add %d bytes length SubTLVs", mtc->length);

  return mtc->length;
}

/* Compute total Sub-TLVs size */
u_char
subtlvs_len (struct mpls_te_circuit *mtc)
{
  int length = 0;

  /* Sanity Check */
  if (mtc == NULL)
    return 0;

  /* TE_SUBTLV_ADMIN_GRP */
  if (SUBTLV_TYPE(mtc->admin_grp) != 0)
    length += SUBTLV_SIZE (&(mtc->admin_grp.header));

  /* TE_SUBTLV_LLRI */
  if (SUBTLV_TYPE(mtc->llri) != 0)
    length += SUBTLV_SIZE (&mtc->llri.header);

  /* TE_SUBTLV_LCLIF_IPADDR */
  if (SUBTLV_TYPE(mtc->local_ipaddr) != 0)
    length += SUBTLV_SIZE (&mtc->local_ipaddr.header);

  /* TE_SUBTLV_RMTIF_IPADDR */
  if (SUBTLV_TYPE(mtc->rmt_ipaddr) != 0)
    length += SUBTLV_SIZE (&mtc->rmt_ipaddr.header);

  /* TE_SUBTLV_MAX_BW */
  if (SUBTLV_TYPE(mtc->max_bw) != 0)
    length += SUBTLV_SIZE (&mtc->max_bw.header);

  /* TE_SUBTLV_MAX_RSV_BW */
  if (SUBTLV_TYPE(mtc->max_rsv_bw) != 0)
    length += SUBTLV_SIZE (&mtc->max_rsv_bw.header);

  /* TE_SUBTLV_UNRSV_BW */
  if (SUBTLV_TYPE(mtc->unrsv_bw) != 0)
    length += SUBTLV_SIZE (&mtc->unrsv_bw.header);

  /* TE_SUBTLV_TE_METRIC */
  if (SUBTLV_TYPE(mtc->te_metric) != 0)
    length += SUBTLV_SIZE (&mtc->te_metric.header);

  /* TE_SUBTLV_AV_DELAY */
  if (SUBTLV_TYPE(mtc->av_delay) != 0)
    length += SUBTLV_SIZE (&mtc->av_delay.header);

  /* TE_SUBTLV_MM_DELAY */
  if (SUBTLV_TYPE(mtc->mm_delay) != 0)
    length += SUBTLV_SIZE (&mtc->mm_delay.header);

  /* TE_SUBTLV_DELAY_VAR */
  if (SUBTLV_TYPE(mtc->delay_var) != 0)
    length += SUBTLV_SIZE (&mtc->delay_var.header);

  /* TE_SUBTLV_PKT_LOSS */
  if (SUBTLV_TYPE(mtc->pkt_loss) != 0)
    length += SUBTLV_SIZE (&mtc->pkt_loss.header);

  /* TE_SUBTLV_RES_BW */
  if (SUBTLV_TYPE(mtc->res_bw) != 0)
    length += SUBTLV_SIZE (&mtc->res_bw.header);

  /* TE_SUBTLV_AVA_BW */
  if (SUBTLV_TYPE(mtc->ava_bw) != 0)
    length += SUBTLV_SIZE (&mtc->ava_bw.header);

  /* TE_SUBTLV_USE_BW */
  if (SUBTLV_TYPE(mtc->use_bw) != 0)
    length += SUBTLV_SIZE (&mtc->use_bw.header);

  /* Check that length is lower than the MAXIMUM SUBTLV size i.e. 256 */
  if (length > MAX_SUBTLV_SIZE)
    {
      mtc->length = 0;
      return 0;
    }

  mtc->length = (u_char)length;

  return mtc->length;
}

/* Following are various functions to set MPLS TE parameters */
static void
set_circuitparams_admin_grp (struct mpls_te_circuit *mtc, u_int32_t admingrp)
{
  SUBTLV_TYPE(mtc->admin_grp) = TE_SUBTLV_ADMIN_GRP;
  SUBTLV_LEN(mtc->admin_grp)  = SUBTLV_DEF_SIZE;
  mtc->admin_grp.value        = htonl(admingrp);
  return;
}

static void  __attribute__ ((unused))
set_circuitparams_llri (struct mpls_te_circuit *mtc, u_int32_t local, u_int32_t remote)
{
  SUBTLV_TYPE(mtc->llri) = TE_SUBTLV_LLRI;
  SUBTLV_LEN(mtc->llri)  = TE_SUBTLV_LLRI_SIZE;
  mtc->llri.local        = htonl(local);
  mtc->llri.remote       = htonl(remote);
}

void
set_circuitparams_local_ipaddr (struct mpls_te_circuit *mtc, struct in_addr addr)
{

  SUBTLV_TYPE(mtc->local_ipaddr) = TE_SUBTLV_LOCAL_IPADDR;
  SUBTLV_LEN(mtc->local_ipaddr)  = SUBTLV_DEF_SIZE;
  mtc->local_ipaddr.value.s_addr = addr.s_addr;
  return;
}

void
set_circuitparams_rmt_ipaddr (struct mpls_te_circuit *mtc, struct in_addr addr)
{

  SUBTLV_TYPE(mtc->rmt_ipaddr) = TE_SUBTLV_RMT_IPADDR;
  SUBTLV_LEN(mtc->rmt_ipaddr)  = SUBTLV_DEF_SIZE;
  mtc->rmt_ipaddr.value.s_addr = addr.s_addr;
  return;
}

static void
set_circuitparams_max_bw (struct mpls_te_circuit *mtc, float fp)
{
  SUBTLV_TYPE(mtc->max_bw) = TE_SUBTLV_MAX_BW;
  SUBTLV_LEN(mtc->max_bw)  = SUBTLV_DEF_SIZE;
  mtc->max_bw.value = htonf(fp);
  return;
}

static void
set_circuitparams_max_rsv_bw (struct mpls_te_circuit *mtc, float fp)
{
  SUBTLV_TYPE(mtc->max_rsv_bw) = TE_SUBTLV_MAX_RSV_BW;
  SUBTLV_LEN(mtc->max_rsv_bw)  = SUBTLV_DEF_SIZE;
  mtc->max_rsv_bw.value = htonf(fp);
  return;
}

static void
set_circuitparams_unrsv_bw (struct mpls_te_circuit *mtc, int priority, float fp)
{
  /* Note that TLV-length field is the size of array. */
  SUBTLV_TYPE(mtc->unrsv_bw) = TE_SUBTLV_UNRSV_BW;
  SUBTLV_LEN(mtc->unrsv_bw)  = TE_SUBTLV_UNRSV_SIZE;
  mtc->unrsv_bw.value[priority] = htonf(fp);
  return;
}

static void
set_circuitparams_te_metric (struct mpls_te_circuit *mtc, u_int32_t te_metric)
{
  SUBTLV_TYPE(mtc->te_metric) = TE_SUBTLV_TE_METRIC;
  SUBTLV_LEN(mtc->te_metric)  = TE_SUBTLV_TE_METRIC_SIZE;
  mtc->te_metric.value[0] = (te_metric >> 16) & 0xFF;
  mtc->te_metric.value[1] = (te_metric  >> 8) & 0xFF;
  mtc->te_metric.value[2] = te_metric & 0xFF;
  return;
}

static void
set_circuitparams_inter_as (struct mpls_te_circuit *mtc, struct in_addr addr, u_int32_t as)
{

  /* Set the Remote ASBR IP address and then the associated AS number */
  SUBTLV_TYPE(mtc->rip) = TE_SUBTLV_RIP;
  SUBTLV_LEN(mtc->rip)  = SUBTLV_DEF_SIZE;
  mtc->rip.value.s_addr = addr.s_addr;

  SUBTLV_TYPE(mtc->ras) = TE_SUBTLV_RAS;
  SUBTLV_LEN(mtc->ras)  = SUBTLV_DEF_SIZE;
  mtc->ras.value        = htonl(as);
}

static void
unset_circuitparams_inter_as (struct mpls_te_circuit *mtc)
{

  /* Reset the Remote ASBR IP address and then the associated AS number */
  SUBTLV_TYPE(mtc->rip) = 0;
  SUBTLV_LEN(mtc->rip)  = 0;
  mtc->rip.value.s_addr = 0;

  SUBTLV_TYPE(mtc->ras) = 0;
  SUBTLV_LEN(mtc->ras)  = 0;
  mtc->ras.value        = 0;
}

static void
set_circuitparams_av_delay (struct mpls_te_circuit *mtc, u_int32_t delay, u_char anormal)
{
  u_int32_t tmp;
  /* Note that TLV-length field is the size of array. */
  SUBTLV_TYPE(mtc->av_delay) = TE_SUBTLV_AV_DELAY;
  SUBTLV_LEN(mtc->av_delay)  = SUBTLV_DEF_SIZE;
  tmp = delay & TE_EXT_MASK;
  if (anormal)
    tmp |= TE_EXT_ANORMAL;
  mtc->av_delay.value = htonl(tmp);
  return;
}

static void
set_circuitparams_mm_delay (struct mpls_te_circuit *mtc, u_int32_t low, u_int32_t high, u_char anormal)
{
  u_int32_t tmp;
  /* Note that TLV-length field is the size of array. */
  SUBTLV_TYPE(mtc->mm_delay) = TE_SUBTLV_MM_DELAY;
  SUBTLV_LEN(mtc->mm_delay)  = TE_SUBTLV_MM_DELAY_SIZE;
  tmp = low & TE_EXT_MASK;
  if (anormal)
    tmp |= TE_EXT_ANORMAL;
  mtc->mm_delay.low = htonl(tmp);
  mtc->mm_delay.high = htonl(high);
  return;
}

static void
set_circuitparams_delay_var (struct mpls_te_circuit *mtc, u_int32_t jitter)
{
  /* Note that TLV-length field is the size of array. */
  SUBTLV_TYPE(mtc->delay_var) = TE_SUBTLV_DELAY_VAR;
  SUBTLV_LEN(mtc->delay_var)  = SUBTLV_DEF_SIZE;
  mtc->delay_var.value        = htonl(jitter & TE_EXT_MASK);
  return;
}

static void
set_circuitparams_pkt_loss (struct mpls_te_circuit *mtc, u_int32_t loss, u_char anormal)
{
  u_int32_t tmp;
  /* Note that TLV-length field is the size of array. */
  SUBTLV_TYPE(mtc->pkt_loss) = TE_SUBTLV_PKT_LOSS;
  SUBTLV_LEN(mtc->pkt_loss)  = SUBTLV_DEF_SIZE;
  tmp = loss & TE_EXT_MASK;
  if (anormal)
    tmp |= TE_EXT_ANORMAL;
  mtc->pkt_loss.value = htonl(tmp);
  return;
}

static void
set_circuitparams_res_bw (struct mpls_te_circuit *mtc, float fp)
{
  /* Note that TLV-length field is the size of array. */
  SUBTLV_TYPE(mtc->res_bw) = TE_SUBTLV_RES_BW;
  SUBTLV_LEN(mtc->res_bw)  = SUBTLV_DEF_SIZE;
  mtc->res_bw.value = htonf(fp);
  return;
}

static void
set_circuitparams_ava_bw (struct mpls_te_circuit *mtc, float fp)
{
  /* Note that TLV-length field is the size of array. */
  SUBTLV_TYPE(mtc->ava_bw) = TE_SUBTLV_AVA_BW;
  SUBTLV_LEN(mtc->ava_bw)  = SUBTLV_DEF_SIZE;
  mtc->ava_bw.value = htonf(fp);
  return;
}

static void
set_circuitparams_use_bw (struct mpls_te_circuit *mtc, float fp)
{
  /* Note that TLV-length field is the size of array. */
  SUBTLV_TYPE(mtc->use_bw) = TE_SUBTLV_USE_BW;
  SUBTLV_LEN(mtc->use_bw)  = SUBTLV_DEF_SIZE;
  mtc->use_bw.value = htonf(fp);
  return;
}

/* Main initialization / update function of the MPLS TE Circuit context */
/* Call when interface TE Link parameters are modified */
void
isis_link_params_update (struct isis_circuit *circuit, struct interface *ifp)
{
  int i;
  struct prefix_ipv4 *addr;
  struct mpls_te_circuit *mtc;

  /* Sanity Check */
  if ((circuit == NULL) || (ifp == NULL))
      return;

  zlog_info ("MPLS-TE: Initialize circuit parameters for interface %s", ifp->name);

  /* Check if MPLS TE Circuit context has not been already created */
  if (circuit->mtc == NULL)
      circuit->mtc = mpls_te_circuit_new();

  mtc = circuit->mtc;

  /* Fulfil MTC TLV from ifp TE Link parameters */
  if (HAS_LINK_PARAMS(ifp))
    {
      mtc->status = enable;
      /* STD_TE metrics */
      if (IS_PARAM_SET(ifp->link_params, LP_ADM_GRP))
        set_circuitparams_admin_grp (mtc, ifp->link_params->admin_grp);
      else
        SUBTLV_TYPE(mtc->admin_grp) = 0;

      /* If not already set, register local IP addr from ip_addr list if it exists */
      if (SUBTLV_TYPE(mtc->local_ipaddr) == 0)
        {
          if (circuit->ip_addrs != NULL && listcount(circuit->ip_addrs) != 0)
            {
              addr = (struct prefix_ipv4 *)listgetdata ((struct listnode *)listhead (circuit->ip_addrs));
              set_circuitparams_local_ipaddr (mtc, addr->prefix);
            }
        }

      /* If not already set, try to determine Remote IP addr if circuit is P2P */
      if ((SUBTLV_TYPE(mtc->rmt_ipaddr) == 0) && (circuit->circ_type == CIRCUIT_T_P2P))
        {
          struct isis_adjacency *adj = circuit->u.p2p.neighbor;
          if (adj->ipv4_addrs != NULL && listcount(adj->ipv4_addrs) != 0)
            {
              struct in_addr *ip_addr;
              ip_addr = (struct in_addr *)listgetdata ((struct listnode *)listhead (adj->ipv4_addrs));
              set_circuitparams_rmt_ipaddr (mtc, *ip_addr);
            }
        }

      if (IS_PARAM_SET(ifp->link_params, LP_MAX_BW))
        set_circuitparams_max_bw (mtc, ifp->link_params->max_bw);
      else
        SUBTLV_TYPE(mtc->max_bw) = 0;

      if (IS_PARAM_SET(ifp->link_params, LP_MAX_RSV_BW))
        set_circuitparams_max_rsv_bw (mtc, ifp->link_params->max_rsv_bw);
      else
        SUBTLV_TYPE(mtc->max_rsv_bw) = 0;

      if (IS_PARAM_SET(ifp->link_params, LP_UNRSV_BW))
        for (i = 0; i < MAX_CLASS_TYPE; i++)
          set_circuitparams_unrsv_bw (mtc, i, ifp->link_params->unrsv_bw[i]);
      else
        SUBTLV_TYPE(mtc->unrsv_bw) = 0;

      if (IS_PARAM_SET(ifp->link_params, LP_TE_METRIC))
        set_circuitparams_te_metric(mtc, ifp->link_params->te_metric);
      else
        SUBTLV_TYPE(mtc->te_metric) = 0;

      /* TE metric Extensions */
      if (IS_PARAM_SET(ifp->link_params, LP_DELAY))
        set_circuitparams_av_delay(mtc, ifp->link_params->av_delay, 0);
      else
        SUBTLV_TYPE(mtc->av_delay) = 0;

      if (IS_PARAM_SET(ifp->link_params, LP_MM_DELAY))
        set_circuitparams_mm_delay(mtc, ifp->link_params->min_delay, ifp->link_params->max_delay, 0);
      else
        SUBTLV_TYPE(mtc->mm_delay) = 0;

      if (IS_PARAM_SET(ifp->link_params, LP_DELAY_VAR))
        set_circuitparams_delay_var(mtc, ifp->link_params->delay_var);
      else
        SUBTLV_TYPE(mtc->delay_var) = 0;

      if (IS_PARAM_SET(ifp->link_params, LP_PKT_LOSS))
        set_circuitparams_pkt_loss(mtc, ifp->link_params->pkt_loss, 0);
      else
        SUBTLV_TYPE(mtc->pkt_loss) = 0;

      if (IS_PARAM_SET(ifp->link_params, LP_RES_BW))
        set_circuitparams_res_bw(mtc, ifp->link_params->res_bw);
      else
        SUBTLV_TYPE(mtc->res_bw) = 0;

      if (IS_PARAM_SET(ifp->link_params, LP_AVA_BW))
        set_circuitparams_ava_bw(mtc, ifp->link_params->ava_bw);
      else
        SUBTLV_TYPE(mtc->ava_bw) = 0;

      if (IS_PARAM_SET(ifp->link_params, LP_USE_BW))
        set_circuitparams_use_bw(mtc, ifp->link_params->use_bw);
      else
        SUBTLV_TYPE(mtc->use_bw) = 0;

      /* INTER_AS */
      if (IS_PARAM_SET(ifp->link_params, LP_RMT_AS))
        set_circuitparams_inter_as(mtc, ifp->link_params->rmt_ip, ifp->link_params->rmt_as);
      else
        /* reset inter-as TE params */
        unset_circuitparams_inter_as (mtc);

      /* Compute total length of SUB TLVs */
      mtc->length = subtlvs_len(mtc);

    }
  else
    mtc->status = disable;

  /* Finally Update LSP */
#if 0
  if (IS_MPLS_TE(isisMplsTE) && circuit->area)
       lsp_regenerate_schedule (circuit->area, circuit->is_type, 0);
#endif
  return;
}

void
isis_mpls_te_update (struct interface *ifp)
{
  struct isis_circuit *circuit;

  /* Sanity Check */
  if (ifp == NULL)
    return;

  /* Get circuit context from interface */
  if ((circuit = circuit_scan_by_ifp(ifp)) == NULL)
    return;

  /* Update TE TLVs ... */
  isis_link_params_update(circuit, ifp);

  /* ... and LSP */
  if (IS_MPLS_TE(isisMplsTE) && circuit->area)
     lsp_regenerate_schedule (circuit->area, circuit->is_type, 0);

  return;
}

/*------------------------------------------------------------------------*
 * Followings are vty session control functions.
 *------------------------------------------------------------------------*/

static u_char
show_vty_subtlv_admin_grp (struct vty *vty, struct te_subtlv_admin_grp *tlv)
{

  if (vty != NULL)
    vty_out (vty, "    Administrative Group: 0x%x%s",
             (u_int32_t) ntohl (tlv->value), VTY_NEWLINE);
  else
    zlog_debug ("      Administrative Group: 0x%x",
                (u_int32_t) ntohl (tlv->value));

  return (SUBTLV_HDR_SIZE + SUBTLV_DEF_SIZE);
}

static u_char
show_vty_subtlv_llri (struct vty *vty, struct te_subtlv_llri *tlv)
{
  if (vty != NULL)
    {
      vty_out (vty, "    Link Local  ID: %d%s", (u_int32_t) ntohl (tlv->local),
               VTY_NEWLINE);
      vty_out (vty, "    Link Remote ID: %d%s", (u_int32_t) ntohl (tlv->remote),
               VTY_NEWLINE);
    }
  else
    {
      zlog_debug ("      Link Local  ID: %d", (u_int32_t) ntohl (tlv->local));
      zlog_debug ("      Link Remote ID: %d", (u_int32_t) ntohl (tlv->remote));
    }

  return (SUBTLV_HDR_SIZE + TE_SUBTLV_LLRI_SIZE);
}

static u_char
show_vty_subtlv_local_ipaddr (struct vty *vty, struct te_subtlv_local_ipaddr *tlv)
{
  if (vty != NULL)
    vty_out (vty, "    Local Interface IP Address(es): %s%s", inet_ntoa (tlv->value), VTY_NEWLINE);
  else
    zlog_debug ("      Local Interface IP Address(es): %s", inet_ntoa (tlv->value));

  return (SUBTLV_HDR_SIZE + SUBTLV_DEF_SIZE);
}

static u_char
show_vty_subtlv_rmt_ipaddr (struct vty *vty, struct te_subtlv_rmt_ipaddr *tlv)
{
  if (vty != NULL)
    vty_out (vty, "    Remote Interface IP Address(es): %s%s", inet_ntoa (tlv->value), VTY_NEWLINE);
  else
    zlog_debug ("      Remote Interface IP Address(es): %s", inet_ntoa (tlv->value));

  return (SUBTLV_HDR_SIZE + SUBTLV_DEF_SIZE);
}

static u_char
show_vty_subtlv_max_bw (struct vty *vty, struct te_subtlv_max_bw *tlv)
{
  float fval;

  fval = ntohf (tlv->value);

  if (vty != NULL)
    vty_out (vty, "    Maximum Bandwidth: %g (Bytes/sec)%s", fval, VTY_NEWLINE);
  else
    zlog_debug ("      Maximum Bandwidth: %g (Bytes/sec)", fval);

  return (SUBTLV_HDR_SIZE + SUBTLV_DEF_SIZE);
}

static u_char
show_vty_subtlv_max_rsv_bw (struct vty *vty, struct te_subtlv_max_rsv_bw *tlv)
{
  float fval;

  fval = ntohf (tlv->value);

  if (vty != NULL)
    vty_out (vty, "    Maximum Reservable Bandwidth: %g (Bytes/sec)%s", fval,
             VTY_NEWLINE);
  else
    zlog_debug ("      Maximum Reservable Bandwidth: %g (Bytes/sec)", fval);

  return (SUBTLV_HDR_SIZE + SUBTLV_DEF_SIZE);
}

static u_char
show_vty_subtlv_unrsv_bw (struct vty *vty, struct te_subtlv_unrsv_bw *tlv)
{
  float fval1, fval2;
  int i;

  if (vty != NULL)
    vty_out (vty, "    Unreserved Bandwidth:%s",VTY_NEWLINE);
  else
    zlog_debug ("      Unreserved Bandwidth:");

  for (i = 0; i < MAX_CLASS_TYPE; i+=2)
    {
      fval1 = ntohf (tlv->value[i]);
      fval2 = ntohf (tlv->value[i+1]);
      if (vty != NULL)
        vty_out (vty, "      [%d]: %g (Bytes/sec),\t[%d]: %g (Bytes/sec)%s", i, fval1, i+1, fval2, VTY_NEWLINE);
      else
        zlog_debug ("        [%d]: %g (Bytes/sec),\t[%d]: %g (Bytes/sec)", i, fval1, i+1, fval2);
    }

  return (SUBTLV_HDR_SIZE + TE_SUBTLV_UNRSV_SIZE);
}

static u_char
show_vty_subtlv_te_metric (struct vty *vty, struct te_subtlv_te_metric *tlv)
{
  u_int32_t te_metric;

  te_metric = tlv->value[2] | tlv->value[1] << 8 | tlv->value[0] << 16;
  if (vty != NULL)
    vty_out (vty, "    Traffic Engineering Metric: %u%s", te_metric, VTY_NEWLINE);
  else
    zlog_debug ("      Traffic Engineering Metric: %u", te_metric);

  return (SUBTLV_HDR_SIZE + SUBTLV_DEF_SIZE);
}

static u_char
show_vty_subtlv_ras (struct vty *vty, struct te_subtlv_ras *tlv)
{
  if (vty != NULL)
    vty_out (vty, "    Inter-AS TE Remote AS number: %u%s", ntohl (tlv->value), VTY_NEWLINE);
  else
    zlog_debug ("      Inter-AS TE Remote AS number: %u", ntohl (tlv->value));

  return (SUBTLV_HDR_SIZE + SUBTLV_DEF_SIZE);
}

static u_char
show_vty_subtlv_rip (struct vty *vty, struct te_subtlv_rip *tlv)
{
  if (vty != NULL)
    vty_out (vty, "    Inter-AS TE Remote ASBR IP address: %s%s", inet_ntoa (tlv->value), VTY_NEWLINE);
  else
    zlog_debug ("      Inter-AS TE Remote ASBR IP address: %s", inet_ntoa (tlv->value));

  return (SUBTLV_HDR_SIZE + SUBTLV_DEF_SIZE);
}

static u_char
show_vty_subtlv_av_delay (struct vty *vty, struct te_subtlv_av_delay *tlv)
{
  u_int32_t delay;
  u_int32_t A;

  delay = (u_int32_t) ntohl (tlv->value) & TE_EXT_MASK;
  A = (u_int32_t) ntohl (tlv->value) & TE_EXT_ANORMAL;

  if (vty != NULL)
    vty_out (vty, "    %s Average Link Delay: %d (micro-sec)%s", A ? "Anomalous" : "Normal", delay, VTY_NEWLINE);
  else
    zlog_debug ("      %s Average Link Delay: %d (micro-sec)", A ? "Anomalous" : "Normal", delay);

  return (SUBTLV_HDR_SIZE + SUBTLV_DEF_SIZE);
}

static u_char
show_vty_subtlv_mm_delay (struct vty *vty, struct te_subtlv_mm_delay *tlv)
{
  u_int32_t low, high;
  u_int32_t A;

  low = (u_int32_t) ntohl (tlv->low) & TE_EXT_MASK;
  A = (u_int32_t) ntohl (tlv->low) & TE_EXT_ANORMAL;
  high = (u_int32_t) ntohl (tlv->high) & TE_EXT_MASK;

  if (vty != NULL)
    vty_out (vty, "    %s Min/Max Link Delay: %d / %d (micro-sec)%s", A ? "Anomalous" : "Normal", low, high, VTY_NEWLINE);
  else
    zlog_debug ("      %s Min/Max Link Delay: %d / %d (micro-sec)", A ? "Anomalous" : "Normal", low, high);

  return (SUBTLV_HDR_SIZE + SUBTLV_DEF_SIZE);
}

static u_char
show_vty_subtlv_delay_var (struct vty *vty, struct te_subtlv_delay_var *tlv)
{
  u_int32_t jitter;

  jitter = (u_int32_t) ntohl (tlv->value) & TE_EXT_MASK;

  if (vty != NULL)
    vty_out (vty, "    Delay Variation: %d (micro-sec)%s", jitter, VTY_NEWLINE);
  else
    zlog_debug ("      Delay Variation: %d (micro-sec)", jitter);

  return (SUBTLV_HDR_SIZE + SUBTLV_DEF_SIZE);
}

static u_char
show_vty_subtlv_pkt_loss (struct vty *vty, struct te_subtlv_pkt_loss *tlv)
{
  u_int32_t loss;
  u_int32_t A;
  float fval;

  loss = (u_int32_t) ntohl (tlv->value) & TE_EXT_MASK;
  fval = (float) (loss * LOSS_PRECISION);
  A = (u_int32_t) ntohl (tlv->value) & TE_EXT_ANORMAL;

  if (vty != NULL)
    vty_out (vty, "    %s Link Packet Loss: %g (%%)%s", A ? "Anomalous" : "Normal", fval, VTY_NEWLINE);
  else
    zlog_debug ("      %s Link Packet Loss: %g (%%)", A ? "Anomalous" : "Normal", fval);

  return (SUBTLV_HDR_SIZE + SUBTLV_DEF_SIZE);
}

static u_char
show_vty_subtlv_res_bw (struct vty *vty, struct te_subtlv_res_bw *tlv)
{
  float fval;

  fval = ntohf(tlv->value);

  if (vty != NULL)
    vty_out (vty, "    Unidirectional Residual Bandwidth: %g (Bytes/sec)%s", fval, VTY_NEWLINE);
  else
    zlog_debug ("      Unidirectional Residual Bandwidth: %g (Bytes/sec)", fval);

  return (SUBTLV_HDR_SIZE + SUBTLV_DEF_SIZE);
}

static u_char
show_vty_subtlv_ava_bw (struct vty *vty, struct te_subtlv_ava_bw *tlv)
{
  float fval;

  fval = ntohf (tlv->value);

  if (vty != NULL)
    vty_out (vty, "    Unidirectional Available Bandwidth: %g (Bytes/sec)%s", fval, VTY_NEWLINE);
  else
    zlog_debug ("      Unidirectional Available Bandwidth: %g (Bytes/sec)", fval);

  return (SUBTLV_HDR_SIZE + SUBTLV_DEF_SIZE);
}

static u_char
show_vty_subtlv_use_bw (struct vty *vty, struct te_subtlv_use_bw *tlv)
{
  float fval;

  fval = ntohf (tlv->value);

  if (vty != NULL)
    vty_out (vty, "    Unidirectional Utilized Bandwidth: %g (Bytes/sec)%s", fval, VTY_NEWLINE);
  else
    zlog_debug ("      Unidirectional Utilized Bandwidth: %g (Bytes/sec)", fval);

  return (SUBTLV_HDR_SIZE + SUBTLV_DEF_SIZE);
}

static u_char
show_vty_unknown_tlv (struct vty *vty, struct subtlv_header *tlvh)
{
  int i, rtn = 1;
  u_char *v = (u_char *)tlvh;

  if (vty != NULL)
    {
      if (tlvh->length != 0)
        {
          vty_out (vty, "    Unknown TLV: [type(%#.2x), length(%#.2x)]%s",
              tlvh->type, tlvh->length, VTY_NEWLINE);
          vty_out(vty, "       Dump: [00]");
          rtn = 1;          /* initialize end of line counter */
          for (i = 0; i < tlvh->length; i++)
            {
              vty_out (vty, " %#.2x", v[i]);
              if (rtn == 8)
                {
                  vty_out (vty, "%s             [%.2x]", VTY_NEWLINE, i + 1);
                  rtn = 1;
                }
              else
                rtn++;
            }
          vty_out (vty, "%s", VTY_NEWLINE);
        }
      else
        vty_out (vty, "    Unknown TLV: [type(%#.2x), length(%#.2x)]%s",
            tlvh->type, tlvh->length, VTY_NEWLINE);
    }
  else
    {
      zlog_debug ("      Unknown TLV: [type(%#.2x), length(%#.2x)]",
          tlvh->type, tlvh->length);
    }

  return SUBTLV_SIZE(tlvh);
}

/* Main Show function */
void
mpls_te_print_detail(struct vty *vty, struct te_is_neigh *te)
{
  struct subtlv_header *tlvh;
  u_int16_t sum = 0;

  zlog_debug ("ISIS MPLS-TE: Show database TE detail");

  tlvh = (struct subtlv_header *)te->sub_tlvs;

  for (; sum < te->sub_tlvs_length; tlvh = SUBTLV_HDR_NEXT (tlvh))
    {
      switch (tlvh->type)
      {
      case TE_SUBTLV_ADMIN_GRP:
        sum += show_vty_subtlv_admin_grp (vty, (struct te_subtlv_admin_grp *)tlvh);
        break;
      case TE_SUBTLV_LLRI:
        sum += show_vty_subtlv_llri (vty, (struct te_subtlv_llri *)tlvh);
        break;
      case TE_SUBTLV_LOCAL_IPADDR:
        sum += show_vty_subtlv_local_ipaddr (vty, (struct te_subtlv_local_ipaddr *)tlvh);
        break;
      case TE_SUBTLV_RMT_IPADDR:
        sum += show_vty_subtlv_rmt_ipaddr (vty, (struct te_subtlv_rmt_ipaddr *)tlvh);
        break;
      case TE_SUBTLV_MAX_BW:
        sum += show_vty_subtlv_max_bw (vty, (struct te_subtlv_max_bw *)tlvh);
        break;
      case TE_SUBTLV_MAX_RSV_BW:
        sum += show_vty_subtlv_max_rsv_bw (vty, (struct te_subtlv_max_rsv_bw *)tlvh);
        break;
      case TE_SUBTLV_UNRSV_BW:
        sum += show_vty_subtlv_unrsv_bw (vty, (struct te_subtlv_unrsv_bw *)tlvh);
        break;
      case TE_SUBTLV_TE_METRIC:
        sum += show_vty_subtlv_te_metric (vty, (struct te_subtlv_te_metric *)tlvh);
        break;
      case TE_SUBTLV_RAS:
        sum += show_vty_subtlv_ras (vty, (struct te_subtlv_ras *)tlvh);
        break;
      case TE_SUBTLV_RIP:
        sum += show_vty_subtlv_rip (vty, (struct te_subtlv_rip *)tlvh);
        break;
      case TE_SUBTLV_AV_DELAY:
        sum += show_vty_subtlv_av_delay (vty, (struct te_subtlv_av_delay *)tlvh);
        break;
      case TE_SUBTLV_MM_DELAY:
        sum += show_vty_subtlv_mm_delay (vty, (struct te_subtlv_mm_delay *)tlvh);
        break;
      case TE_SUBTLV_DELAY_VAR:
        sum += show_vty_subtlv_delay_var (vty, (struct te_subtlv_delay_var *)tlvh);
        break;
      case TE_SUBTLV_PKT_LOSS:
        sum += show_vty_subtlv_pkt_loss (vty, (struct te_subtlv_pkt_loss *)tlvh);
        break;
      case TE_SUBTLV_RES_BW:
        sum += show_vty_subtlv_res_bw (vty, (struct te_subtlv_res_bw *)tlvh);
        break;
      case TE_SUBTLV_AVA_BW:
        sum += show_vty_subtlv_ava_bw (vty, (struct te_subtlv_ava_bw *)tlvh);
        break;
      case TE_SUBTLV_USE_BW:
        sum += show_vty_subtlv_use_bw (vty, (struct te_subtlv_use_bw *)tlvh);
        break;
      default:
        sum += show_vty_unknown_tlv (vty, tlvh);
        break;
      }
    }
  return;
}

/* Specific MPLS TE router parameters write function */
void
isis_mpls_te_config_write_router (struct vty *vty)
{
  if (IS_MPLS_TE(isisMplsTE))
    {
      vty_out (vty, "  mpls-te on%s", VTY_NEWLINE);
      vty_out (vty, "  mpls-te router-address %s%s",
               inet_ntoa (isisMplsTE.router_id), VTY_NEWLINE);
    }

  return;
}


/*------------------------------------------------------------------------*
 * Followings are vty command functions.
 *------------------------------------------------------------------------*/

DEFUN (isis_mpls_te_on,
       isis_mpls_te_on_cmd,
       "mpls-te on",
       MPLS_TE_STR
       "Enable MPLS-TE functionality\n")
{
  struct listnode *node;
  struct isis_circuit *circuit;

  if (IS_MPLS_TE(isisMplsTE))
    return CMD_SUCCESS;

  if (IS_DEBUG_ISIS(DEBUG_TE))
    zlog_debug ("ISIS MPLS-TE: OFF -> ON");

  isisMplsTE.status = enable;

  /*
   * Following code is intended to handle two cases;
   *
   * 1) MPLS-TE was disabled at startup time, but now become enabled.
   * In this case, we must enable MPLS-TE Circuit regarding interface MPLS_TE flag
   * 2) MPLS-TE was once enabled then disabled, and now enabled again.
   */
  for (ALL_LIST_ELEMENTS_RO (isisMplsTE.cir_list, node, circuit))
    {
      if (circuit->mtc == NULL || IS_FLOOD_AS (circuit->mtc->type))
        continue;

      if ((circuit->mtc->status == disable)
          && HAS_LINK_PARAMS(circuit->interface))
        circuit->mtc->status = enable;
      else
        continue;

      /* Reoriginate STD_TE & GMPLS circuits */
      if (circuit->area)
        lsp_regenerate_schedule (circuit->area, circuit->is_type, 0);
    }

  return CMD_SUCCESS;
}

DEFUN (no_isis_mpls_te_on,
       no_isis_mpls_te_on_cmd,
       "no mpls-te",
       NO_STR
       "Disable the MPLS-TE functionality\n")
{
  struct listnode *node;
  struct isis_circuit *circuit;

  if (isisMplsTE.status == disable)
    return CMD_SUCCESS;

  if (IS_DEBUG_ISIS(DEBUG_TE))
    zlog_debug ("ISIS MPLS-TE: ON -> OFF");

  isisMplsTE.status = disable;

  /* Flush LSP if circuit engage */
  for (ALL_LIST_ELEMENTS_RO (isisMplsTE.cir_list, node, circuit))
    {
      if (circuit->mtc == NULL || (circuit->mtc->status == disable))
        continue;

      /* disable MPLS_TE Circuit */
      circuit->mtc->status = disable;

      /* Re-originate circuit without STD_TE & GMPLS parameters */
      if (circuit->area)
        lsp_regenerate_schedule (circuit->area, circuit->is_type, 0);
    }

  return CMD_SUCCESS;
}

DEFUN (isis_mpls_te_router_addr,
       isis_mpls_te_router_addr_cmd,
       "mpls-te router-address A.B.C.D",
       MPLS_TE_STR
       "Stable IP address of the advertising router\n"
       "MPLS-TE router address in IPv4 address format\n")
{
  int idx_ipv4 = 2;
  struct in_addr value;
  struct listnode *node;
  struct isis_area *area;

  if (! inet_aton (argv[idx_ipv4]->arg, &value))
    {
      vty_out (vty, "Please specify Router-Addr by A.B.C.D%s", VTY_NEWLINE);
      return CMD_WARNING;
    }

  isisMplsTE.router_id.s_addr = value.s_addr;

  if (isisMplsTE.status == disable)
    return CMD_SUCCESS;

  /* Update main Router ID in isis global structure */
  isis->router_id = value.s_addr;
  /* And re-schedule LSP update */
  for (ALL_LIST_ELEMENTS_RO (isis->area_list, node, area))
    if (listcount (area->area_addrs) > 0)
      lsp_regenerate_schedule (area, area->is_type, 0);

  return CMD_SUCCESS;
}

DEFUN (isis_mpls_te_inter_as,
       isis_mpls_te_inter_as_cmd,
       "mpls-te inter-as <level-1|level-1-2|level-2-only>",
       MPLS_TE_STR
       "Configure MPLS-TE Inter-AS support\n"
       "AREA native mode self originate INTER-AS LSP with L1 only flooding scope)\n"
       "AREA native mode self originate INTER-AS LSP with L1 and L2 flooding scope)\n"
       "AS native mode self originate INTER-AS LSP with L2 only flooding scope\n")
{
  vty_out (vty, "Not yet supported%s", VTY_NEWLINE);
  return CMD_SUCCESS;
}

DEFUN (no_isis_mpls_te_inter_as,
       no_isis_mpls_te_inter_as_cmd,
       "no mpls-te inter-as",
       NO_STR
       "Disable the MPLS-TE functionality\n"
       "Disable MPLS-TE Inter-AS support\n")
{

  vty_out (vty, "Not yet supported%s", VTY_NEWLINE);
  return CMD_SUCCESS;
}

DEFUN (show_isis_mpls_te_router,
       show_isis_mpls_te_router_cmd,
       "show isis mpls-te router",
       SHOW_STR
       ISIS_STR
       MPLS_TE_STR
       "Router information\n")
{
  if (IS_MPLS_TE(isisMplsTE))
    {
      vty_out (vty, "--- MPLS-TE router parameters ---%s", VTY_NEWLINE);

      if (ntohs (isisMplsTE.router_id.s_addr) != 0)
        vty_out (vty, "  Router-Address: %s%s", inet_ntoa (isisMplsTE.router_id), VTY_NEWLINE);
      else
        vty_out (vty, "  N/A%s", VTY_NEWLINE);
    }
  else
    vty_out (vty, "  MPLS-TE is disable on this router%s", VTY_NEWLINE);

  return CMD_SUCCESS;
}

static void
show_mpls_te_sub (struct vty *vty, struct interface *ifp)
{
  struct mpls_te_circuit *mtc;

  if ((IS_MPLS_TE(isisMplsTE))
      &&  ((mtc = lookup_mpls_params_by_ifp (ifp)) != NULL))
    {
      /* Continue only if interface is not passive or support Inter-AS TEv2 */
      if (mtc->status != enable)
        {
          if (IS_INTER_AS(mtc->type))
            {
              vty_out (vty, "-- Inter-AS TEv2 link parameters for %s --%s",
                       ifp->name, VTY_NEWLINE);
            }
          else
            {
              /* MPLS-TE is not activate on this interface */
              /* or this interface is passive and Inter-AS TEv2 is not activate */
              vty_out (vty, "  %s: MPLS-TE is disabled on this interface%s",
                       ifp->name, VTY_NEWLINE);
              return;
            }
        }
      else
        {
          vty_out (vty, "-- MPLS-TE link parameters for %s --%s",
                   ifp->name, VTY_NEWLINE);
        }

      show_vty_subtlv_admin_grp (vty, &mtc->admin_grp);

      if (SUBTLV_TYPE(mtc->local_ipaddr) != 0)
        show_vty_subtlv_local_ipaddr (vty, &mtc->local_ipaddr);
      if (SUBTLV_TYPE(mtc->rmt_ipaddr) != 0)
        show_vty_subtlv_rmt_ipaddr (vty, &mtc->rmt_ipaddr);

      show_vty_subtlv_max_bw (vty, &mtc->max_bw);
      show_vty_subtlv_max_rsv_bw (vty, &mtc->max_rsv_bw);
      show_vty_subtlv_unrsv_bw (vty, &mtc->unrsv_bw);
      show_vty_subtlv_te_metric (vty, &mtc->te_metric);

      if (IS_INTER_AS(mtc->type))
        {
          if (SUBTLV_TYPE(mtc->ras) != 0)
            show_vty_subtlv_ras (vty, &mtc->ras);
          if (SUBTLV_TYPE(mtc->rip) != 0)
            show_vty_subtlv_rip (vty, &mtc->rip);
        }

      show_vty_subtlv_av_delay (vty, &mtc->av_delay);
      show_vty_subtlv_mm_delay (vty, &mtc->mm_delay);
      show_vty_subtlv_delay_var (vty, &mtc->delay_var);
      show_vty_subtlv_pkt_loss (vty, &mtc->pkt_loss);
      show_vty_subtlv_res_bw (vty, &mtc->res_bw);
      show_vty_subtlv_ava_bw (vty, &mtc->ava_bw);
      show_vty_subtlv_use_bw (vty, &mtc->use_bw);
      vty_out (vty, "---------------%s%s", VTY_NEWLINE, VTY_NEWLINE);
    }
  else
    {
      vty_out (vty, "  %s: MPLS-TE is disabled on this interface%s",
               ifp->name, VTY_NEWLINE);
    }

  return;
}

DEFUN (show_isis_mpls_te_interface,
       show_isis_mpls_te_interface_cmd,
       "show isis mpls-te interface [INTERFACE]",
       SHOW_STR
       ISIS_STR
       MPLS_TE_STR
       "Interface information\n"
       "Interface name\n")
{
  int idx_interface = 4;
  struct interface *ifp;
  struct listnode *node;

  /* Show All Interfaces. */
  if (argc == 4)
    {
      for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), node, ifp))
        show_mpls_te_sub (vty, ifp);
    }
  /* Interface name is specified. */
  else
    {
      if ((ifp = if_lookup_by_name (argv[idx_interface]->arg, VRF_DEFAULT)) == NULL)
        vty_out (vty, "No such interface name%s", VTY_NEWLINE);
      else
        show_mpls_te_sub (vty, ifp);
    }

  return CMD_SUCCESS;
}

/* Initialize MPLS_TE */
void
isis_mpls_te_init (void)
{

  zlog_debug("ISIS MPLS-TE: Initialize");

  /* Initialize MPLS_TE structure */
  isisMplsTE.status = disable;
  isisMplsTE.level = 0;
  isisMplsTE.inter_as = off;
  isisMplsTE.interas_areaid.s_addr = 0;
  isisMplsTE.cir_list = list_new();
  isisMplsTE.router_id.s_addr = 0;

  /* Register new VTY commands */
  install_element (VIEW_NODE, &show_isis_mpls_te_router_cmd);
  install_element (VIEW_NODE, &show_isis_mpls_te_interface_cmd);

  install_element (ISIS_NODE, &isis_mpls_te_on_cmd);
  install_element (ISIS_NODE, &no_isis_mpls_te_on_cmd);
  install_element (ISIS_NODE, &isis_mpls_te_router_addr_cmd);
  install_element (ISIS_NODE, &isis_mpls_te_inter_as_cmd);
  install_element (ISIS_NODE, &no_isis_mpls_te_inter_as_cmd);

  return;
}