/src/frr/ospfd/ospf_te.c

Source
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * This is an implementation of RFC3630
 * Copyright (C) 2001 KDD R&D Laboratories, Inc.
 * http://www.kddlabs.co.jp/
 *
 * Copyright (C) 2012 Orange Labs
 * http://www.orange.com
 */

/* Add support of RFC7471 */
/* Add support of RFC5392, RFC6827 */

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

#include "linklist.h"
#include "prefix.h"
#include "vrf.h"
#include "if.h"
#include "table.h"
#include "memory.h"
#include "command.h"
#include "vty.h"
#include "stream.h"
#include "log.h"
#include "frrevent.h"
#include "hash.h"
#include "sockunion.h" /* for inet_aton() */
#include "network.h"
#include "link_state.h"
#include "zclient.h"
#include "printfrr.h"

#include "ospfd/ospfd.h"
#include "ospfd/ospf_interface.h"
#include "ospfd/ospf_ism.h"
#include "ospfd/ospf_asbr.h"
#include "ospfd/ospf_lsa.h"
#include "ospfd/ospf_lsdb.h"
#include "ospfd/ospf_neighbor.h"
#include "ospfd/ospf_nsm.h"
#include "ospfd/ospf_flood.h"
#include "ospfd/ospf_packet.h"
#include "ospfd/ospf_spf.h"
#include "ospfd/ospf_dump.h"
#include "ospfd/ospf_route.h"
#include "ospfd/ospf_ase.h"
#include "ospfd/ospf_zebra.h"
#include "ospfd/ospf_te.h"
#include "ospfd/ospf_sr.h"
#include "ospfd/ospf_ri.h"
#include "ospfd/ospf_ext.h"
#include "ospfd/ospf_vty.h"
#include "ospfd/ospf_errors.h"

/*
 * Global variable to manage Opaque-LSA/MPLS-TE on this node.
 * Note that all parameter values are stored in network byte order.
 */
struct ospf_mpls_te OspfMplsTE;

static const char *const mode2text[] = {"Off", "AS", "Area"};


/*------------------------------------------------------------------------*
 * Following are initialize/terminate functions for MPLS-TE handling.
 *------------------------------------------------------------------------*/

static int ospf_mpls_te_new_if(struct interface *ifp);
static int ospf_mpls_te_del_if(struct interface *ifp);
static void ospf_mpls_te_ism_change(struct ospf_interface *oi, int old_status);
static void ospf_mpls_te_nsm_change(struct ospf_neighbor *nbr, int old_status);
static void ospf_mpls_te_config_write_router(struct vty *vty);
static void ospf_mpls_te_show_info(struct vty *vty, struct json_object *json,
           struct ospf_lsa *lsa);
static int ospf_mpls_te_lsa_originate_area(void *arg);
static int ospf_mpls_te_lsa_inter_as_as(void *arg);
static int ospf_mpls_te_lsa_inter_as_area(void *arg);
static struct ospf_lsa *ospf_mpls_te_lsa_refresh(struct ospf_lsa *lsa);
static int ospf_mpls_te_lsa_update(struct ospf_lsa *lsa);
static int ospf_mpls_te_lsa_delete(struct ospf_lsa *lsa);

static void del_mpls_te_link(void *val);
static void ospf_mpls_te_register_vty(void);

int ospf_mpls_te_init(void)
{
  int rc;

  /* Register Opaque AREA LSA Type 1 for Traffic Engineering */
  rc = ospf_register_opaque_functab(
    OSPF_OPAQUE_AREA_LSA,
    OPAQUE_TYPE_TRAFFIC_ENGINEERING_LSA,
    ospf_mpls_te_new_if,
    ospf_mpls_te_del_if,
    ospf_mpls_te_ism_change,
    ospf_mpls_te_nsm_change,
    ospf_mpls_te_config_write_router,
    NULL, /* ospf_mpls_te_config_write_if */
    NULL, /* ospf_mpls_te_config_write_debug */
    ospf_mpls_te_show_info, ospf_mpls_te_lsa_originate_area,
    ospf_mpls_te_lsa_refresh,
    ospf_mpls_te_lsa_update, /* ospf_mpls_te_new_lsa_hook */
    ospf_mpls_te_lsa_delete /* ospf_mpls_te_del_lsa_hook */);
  if (rc != 0) {
    flog_warn(
      EC_OSPF_OPAQUE_REGISTRATION,
      "MPLS-TE (%s): Failed to register Traffic Engineering functions",
      __func__);
    return rc;
  }

  /*
   * Wee need also to register Opaque LSA Type 6 i.e. Inter-AS RFC5392 for
   * both AREA and AS at least to have the possibility to call the show()
   * function when looking to the opaque LSA of the OSPF database.
   */
  rc = ospf_register_opaque_functab(OSPF_OPAQUE_AREA_LSA,
            OPAQUE_TYPE_INTER_AS_LSA, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL,
            ospf_mpls_te_show_info,
            ospf_mpls_te_lsa_inter_as_area,
            ospf_mpls_te_lsa_refresh, NULL, NULL);
  if (rc != 0) {
    flog_warn(
      EC_OSPF_OPAQUE_REGISTRATION,
      "MPLS-TE (%s): Failed to register Inter-AS with Area scope",
      __func__);
    return rc;
  }

  rc = ospf_register_opaque_functab(OSPF_OPAQUE_AS_LSA,
            OPAQUE_TYPE_INTER_AS_LSA, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL,
            ospf_mpls_te_show_info,
            ospf_mpls_te_lsa_inter_as_as,
            ospf_mpls_te_lsa_refresh, NULL, NULL);
  if (rc != 0) {
    flog_warn(
      EC_OSPF_OPAQUE_REGISTRATION,
      "MPLS-TE (%s): Failed to register Inter-AS with AS scope",
      __func__);
    return rc;
  }

  memset(&OspfMplsTE, 0, sizeof(OspfMplsTE));
  OspfMplsTE.enabled = false;
  OspfMplsTE.export = false;
  OspfMplsTE.inter_as = Off;
  OspfMplsTE.iflist = list_new();
  OspfMplsTE.iflist->del = del_mpls_te_link;

  ospf_mpls_te_register_vty();

  return rc;
}

void ospf_mpls_te_term(void)
{
  list_delete(&OspfMplsTE.iflist);

  ospf_delete_opaque_functab(OSPF_OPAQUE_AREA_LSA,
           OPAQUE_TYPE_TRAFFIC_ENGINEERING_LSA);
  ospf_delete_opaque_functab(OSPF_OPAQUE_AREA_LSA,
           OPAQUE_TYPE_INTER_AS_LSA);
  ospf_delete_opaque_functab(OSPF_OPAQUE_AS_LSA,
           OPAQUE_TYPE_INTER_AS_LSA);

  OspfMplsTE.enabled = false;
  OspfMplsTE.inter_as = Off;
  OspfMplsTE.export = false;

  return;
}

void ospf_mpls_te_finish(void)
{
  OspfMplsTE.enabled = false;
  OspfMplsTE.inter_as = Off;
  OspfMplsTE.export = false;
}

/*------------------------------------------------------------------------*
 * Following are control functions for MPLS-TE parameters management.
 *------------------------------------------------------------------------*/
static void del_mpls_te_link(void *val)
{
  XFREE(MTYPE_OSPF_MPLS_TE, val);
  return;
}

static uint32_t get_mpls_te_instance_value(void)
{
  static uint32_t seqno = 0;

  if (seqno < MAX_LEGAL_TE_INSTANCE_NUM)
    seqno += 1;
  else
    seqno = 1; /* Avoid zero. */

  return seqno;
}

static struct mpls_te_link *lookup_linkparams_by_ifp(struct interface *ifp)
{
  struct listnode *node, *nnode;
  struct mpls_te_link *lp;

  for (ALL_LIST_ELEMENTS(OspfMplsTE.iflist, node, nnode, lp))
    if (lp->ifp == ifp)
      return lp;

  return NULL;
}

static struct mpls_te_link *lookup_linkparams_by_instance(struct ospf_lsa *lsa)
{
  struct listnode *node;
  struct mpls_te_link *lp;
  unsigned int key = GET_OPAQUE_ID(ntohl(lsa->data->id.s_addr));

  for (ALL_LIST_ELEMENTS_RO(OspfMplsTE.iflist, node, lp))
    if (lp->instance == key)
      return lp;

  ote_debug("MPLS-TE (%s): Entry not found: key(%x)", __func__, key);
  return NULL;
}

static void ospf_mpls_te_foreach_area(
  void (*func)(struct mpls_te_link *lp, enum lsa_opcode sched_opcode),
  enum lsa_opcode sched_opcode)
{
  struct listnode *node, *nnode;
  struct listnode *node2;
  struct mpls_te_link *lp;
  struct ospf_area *area;

  for (ALL_LIST_ELEMENTS(OspfMplsTE.iflist, node, nnode, lp)) {
    /* Skip Inter-AS TEv2 Links */
    if (IS_INTER_AS(lp->type))
      continue;
    if ((area = lp->area) == NULL)
      continue;
    if (CHECK_FLAG(lp->flags, LPFLG_LOOKUP_DONE))
      continue;

    if (func != NULL)
      (*func)(lp, sched_opcode);

    for (node2 = listnextnode(node); node2;
         node2 = listnextnode(node2))
      if ((lp = listgetdata(node2)) != NULL)
        if (lp->area != NULL)
          if (IPV4_ADDR_SAME(&lp->area->area_id,
                 &area->area_id))
            SET_FLAG(lp->flags,
               LPFLG_LOOKUP_DONE);
  }

  for (ALL_LIST_ELEMENTS_RO(OspfMplsTE.iflist, node, lp))
    if (lp->area != NULL)
      UNSET_FLAG(lp->flags, LPFLG_LOOKUP_DONE);

  return;
}

static void set_mpls_te_router_addr(struct in_addr ipv4)
{
  OspfMplsTE.router_addr.header.type = htons(TE_TLV_ROUTER_ADDR);
  OspfMplsTE.router_addr.header.length = htons(TE_LINK_SUBTLV_DEF_SIZE);
  OspfMplsTE.router_addr.value = ipv4;
  return;
}

static void set_linkparams_link_header(struct mpls_te_link *lp)
{
  uint16_t length = 0;

  /* TE_LINK_SUBTLV_LINK_TYPE */
  if (ntohs(lp->link_type.header.type) != 0)
    length += TLV_SIZE(&lp->link_type.header);

  /* TE_LINK_SUBTLV_LINK_ID */
  if (ntohs(lp->link_id.header.type) != 0)
    length += TLV_SIZE(&lp->link_id.header);

  /* TE_LINK_SUBTLV_LCLIF_IPADDR */
  if (lp->lclif_ipaddr.header.type != 0)
    length += TLV_SIZE(&lp->lclif_ipaddr.header);

  /* TE_LINK_SUBTLV_RMTIF_IPADDR */
  if (lp->rmtif_ipaddr.header.type != 0)
    length += TLV_SIZE(&lp->rmtif_ipaddr.header);

  /* TE_LINK_SUBTLV_TE_METRIC */
  if (ntohs(lp->te_metric.header.type) != 0)
    length += TLV_SIZE(&lp->te_metric.header);

  /* TE_LINK_SUBTLV_MAX_BW */
  if (ntohs(lp->max_bw.header.type) != 0)
    length += TLV_SIZE(&lp->max_bw.header);

  /* TE_LINK_SUBTLV_MAX_RSV_BW */
  if (ntohs(lp->max_rsv_bw.header.type) != 0)
    length += TLV_SIZE(&lp->max_rsv_bw.header);

  /* TE_LINK_SUBTLV_UNRSV_BW */
  if (ntohs(lp->unrsv_bw.header.type) != 0)
    length += TLV_SIZE(&lp->unrsv_bw.header);

  /* TE_LINK_SUBTLV_RSC_CLSCLR */
  if (ntohs(lp->rsc_clsclr.header.type) != 0)
    length += TLV_SIZE(&lp->rsc_clsclr.header);

  /* TE_LINK_SUBTLV_LLRI */
  if (ntohs(lp->llri.header.type) != 0)
    length += TLV_SIZE(&lp->llri.header);

  /* TE_LINK_SUBTLV_RIP */
  if (ntohs(lp->rip.header.type) != 0)
    length += TLV_SIZE(&lp->rip.header);

  /* TE_LINK_SUBTLV_RAS */
  if (ntohs(lp->ras.header.type) != 0)
    length += TLV_SIZE(&lp->ras.header);

  /* TE_LINK_SUBTLV_LRRID */
  if (ntohs(lp->lrrid.header.type) != 0)
    length += TLV_SIZE(&lp->lrrid.header);

  /* TE_LINK_SUBTLV_AV_DELAY */
  if (ntohs(lp->av_delay.header.type) != 0)
    length += TLV_SIZE(&lp->av_delay.header);

  /* TE_LINK_SUBTLV_MM_DELAY */
  if (ntohs(lp->mm_delay.header.type) != 0)
    length += TLV_SIZE(&lp->mm_delay.header);

  /* TE_LINK_SUBTLV_DELAY_VAR */
  if (ntohs(lp->delay_var.header.type) != 0)
    length += TLV_SIZE(&lp->delay_var.header);

  /* TE_LINK_SUBTLV_PKT_LOSS */
  if (ntohs(lp->pkt_loss.header.type) != 0)
    length += TLV_SIZE(&lp->pkt_loss.header);

  /* TE_LINK_SUBTLV_RES_BW */
  if (ntohs(lp->res_bw.header.type) != 0)
    length += TLV_SIZE(&lp->res_bw.header);

  /* TE_LINK_SUBTLV_AVA_BW */
  if (ntohs(lp->ava_bw.header.type) != 0)
    length += TLV_SIZE(&lp->ava_bw.header);

  /* TE_LINK_SUBTLV_USE_BW */
  if (ntohs(lp->use_bw.header.type) != 0)
    length += TLV_SIZE(&lp->use_bw.header);

  lp->link_header.header.type = htons(TE_TLV_LINK);
  lp->link_header.header.length = htons(length);

  return;
}

static void set_linkparams_link_type(struct ospf_interface *oi,
             struct mpls_te_link *lp)
{
  lp->link_type.header.type = htons(TE_LINK_SUBTLV_LINK_TYPE);
  lp->link_type.header.length = htons(TE_LINK_SUBTLV_TYPE_SIZE);

  switch (oi->type) {
  case OSPF_IFTYPE_POINTOPOINT:
    lp->link_type.link_type.value = LINK_TYPE_SUBTLV_VALUE_PTP;
    break;
  case OSPF_IFTYPE_BROADCAST:
  case OSPF_IFTYPE_NBMA:
    lp->link_type.link_type.value = LINK_TYPE_SUBTLV_VALUE_MA;
    break;
  default:
    /* Not supported yet. */ /* XXX */
    lp->link_type.header.type = htons(0);
    break;
  }
  return;
}

static void set_linkparams_link_id(struct mpls_te_link *lp,
           struct in_addr link_id)
{

  lp->link_id.header.type = htons(TE_LINK_SUBTLV_LINK_ID);
  lp->link_id.header.length = htons(TE_LINK_SUBTLV_DEF_SIZE);
  lp->link_id.value = link_id;
  return;
}

static void set_linkparams_lclif_ipaddr(struct mpls_te_link *lp,
          struct in_addr lclif)
{

  lp->lclif_ipaddr.header.type = htons(TE_LINK_SUBTLV_LCLIF_IPADDR);
  lp->lclif_ipaddr.header.length = htons(TE_LINK_SUBTLV_DEF_SIZE);
  lp->lclif_ipaddr.value[0] = lclif;
  return;
}

static void set_linkparams_rmtif_ipaddr(struct mpls_te_link *lp,
          struct in_addr rmtif)
{

  lp->rmtif_ipaddr.header.type = htons(TE_LINK_SUBTLV_RMTIF_IPADDR);
  lp->rmtif_ipaddr.header.length = htons(TE_LINK_SUBTLV_DEF_SIZE);
  lp->rmtif_ipaddr.value[0] = rmtif;
  return;
}

static void set_linkparams_te_metric(struct mpls_te_link *lp,
             uint32_t te_metric)
{
  lp->te_metric.header.type = htons(TE_LINK_SUBTLV_TE_METRIC);
  lp->te_metric.header.length = htons(TE_LINK_SUBTLV_DEF_SIZE);
  lp->te_metric.value = htonl(te_metric);
  return;
}

static void set_linkparams_max_bw(struct mpls_te_link *lp, float fp)
{
  lp->max_bw.header.type = htons(TE_LINK_SUBTLV_MAX_BW);
  lp->max_bw.header.length = htons(TE_LINK_SUBTLV_DEF_SIZE);
  lp->max_bw.value = htonf(fp);
  return;
}

static void set_linkparams_max_rsv_bw(struct mpls_te_link *lp, float fp)
{
  lp->max_rsv_bw.header.type = htons(TE_LINK_SUBTLV_MAX_RSV_BW);
  lp->max_rsv_bw.header.length = htons(TE_LINK_SUBTLV_DEF_SIZE);
  lp->max_rsv_bw.value = htonf(fp);
  return;
}

static void set_linkparams_unrsv_bw(struct mpls_te_link *lp, int priority,
            float fp)
{
  /* Note that TLV-length field is the size of array. */
  lp->unrsv_bw.header.type = htons(TE_LINK_SUBTLV_UNRSV_BW);
  lp->unrsv_bw.header.length = htons(TE_LINK_SUBTLV_UNRSV_SIZE);
  lp->unrsv_bw.value[priority] = htonf(fp);
  return;
}

static void set_linkparams_rsc_clsclr(struct mpls_te_link *lp,
              uint32_t classcolor)
{
  lp->rsc_clsclr.header.type = htons(TE_LINK_SUBTLV_RSC_CLSCLR);
  lp->rsc_clsclr.header.length = htons(TE_LINK_SUBTLV_DEF_SIZE);
  lp->rsc_clsclr.value = htonl(classcolor);
  return;
}

static void set_linkparams_inter_as(struct mpls_te_link *lp,
            struct in_addr addr, uint32_t as)
{

  /* Set the Remote ASBR IP address and then the associated AS number */
  lp->rip.header.type = htons(TE_LINK_SUBTLV_RIP);
  lp->rip.header.length = htons(TE_LINK_SUBTLV_DEF_SIZE);
  lp->rip.value = addr;

  lp->ras.header.type = htons(TE_LINK_SUBTLV_RAS);
  lp->ras.header.length = htons(TE_LINK_SUBTLV_DEF_SIZE);
  lp->ras.value = htonl(as);

  /* Set Type & Flooding flag accordingly */
  lp->type = INTER_AS;
  if (OspfMplsTE.inter_as == AS)
    SET_FLAG(lp->flags, LPFLG_LSA_FLOOD_AS);
  else
    UNSET_FLAG(lp->flags, LPFLG_LSA_FLOOD_AS);
}

static void unset_linkparams_inter_as(struct mpls_te_link *lp)
{

  /* Reset the Remote ASBR IP address and then the associated AS number */
  lp->rip.header.type = htons(0);
  lp->rip.header.length = htons(0);
  lp->rip.value.s_addr = htonl(0);

  lp->ras.header.type = htons(0);
  lp->ras.header.length = htons(0);
  lp->ras.value = htonl(0);

  /* Reset Type & Flooding flag accordingly */
  lp->type = STD_TE;
  UNSET_FLAG(lp->flags, LPFLG_LSA_FLOOD_AS);
}

void set_linkparams_llri(struct mpls_te_link *lp, uint32_t local,
       uint32_t remote)
{

  lp->llri.header.type = htons(TE_LINK_SUBTLV_LLRI);
  lp->llri.header.length = htons(TE_LINK_SUBTLV_LLRI_SIZE);
  lp->llri.local = htonl(local);
  lp->llri.remote = htonl(remote);
}

void set_linkparams_lrrid(struct mpls_te_link *lp, struct in_addr local,
        struct in_addr remote)
{

  lp->lrrid.header.type = htons(TE_LINK_SUBTLV_LRRID);
  lp->lrrid.header.length = htons(TE_LINK_SUBTLV_LRRID_SIZE);
  lp->lrrid.local.s_addr = local.s_addr;
  lp->lrrid.remote.s_addr = remote.s_addr;
}

static void set_linkparams_av_delay(struct mpls_te_link *lp, uint32_t delay,
            uint8_t anormal)
{
  uint32_t tmp;
  /* Note that TLV-length field is the size of array. */
  lp->av_delay.header.type = htons(TE_LINK_SUBTLV_AV_DELAY);
  lp->av_delay.header.length = htons(TE_LINK_SUBTLV_DEF_SIZE);
  tmp = delay & TE_EXT_MASK;
  if (anormal)
    tmp |= TE_EXT_ANORMAL;
  lp->av_delay.value = htonl(tmp);
  return;
}

static void set_linkparams_mm_delay(struct mpls_te_link *lp, uint32_t low,
            uint32_t high, uint8_t anormal)
{
  uint32_t tmp;
  /* Note that TLV-length field is the size of array. */
  lp->mm_delay.header.type = htons(TE_LINK_SUBTLV_MM_DELAY);
  lp->mm_delay.header.length = htons(TE_LINK_SUBTLV_MM_DELAY_SIZE);
  tmp = low & TE_EXT_MASK;
  if (anormal)
    tmp |= TE_EXT_ANORMAL;
  lp->mm_delay.low = htonl(tmp);
  lp->mm_delay.high = htonl(high);
  return;
}

static void set_linkparams_delay_var(struct mpls_te_link *lp, uint32_t jitter)
{
  /* Note that TLV-length field is the size of array. */
  lp->delay_var.header.type = htons(TE_LINK_SUBTLV_DELAY_VAR);
  lp->delay_var.header.length = htons(TE_LINK_SUBTLV_DEF_SIZE);
  lp->delay_var.value = htonl(jitter & TE_EXT_MASK);
  return;
}

static void set_linkparams_pkt_loss(struct mpls_te_link *lp, uint32_t loss,
            uint8_t anormal)
{
  uint32_t tmp;
  /* Note that TLV-length field is the size of array. */
  lp->pkt_loss.header.type = htons(TE_LINK_SUBTLV_PKT_LOSS);
  lp->pkt_loss.header.length = htons(TE_LINK_SUBTLV_DEF_SIZE);
  tmp = loss & TE_EXT_MASK;
  if (anormal)
    tmp |= TE_EXT_ANORMAL;
  lp->pkt_loss.value = htonl(tmp);
  return;
}

static void set_linkparams_res_bw(struct mpls_te_link *lp, float fp)
{
  /* Note that TLV-length field is the size of array. */
  lp->res_bw.header.type = htons(TE_LINK_SUBTLV_RES_BW);
  lp->res_bw.header.length = htons(TE_LINK_SUBTLV_DEF_SIZE);
  lp->res_bw.value = htonf(fp);
  return;
}

static void set_linkparams_ava_bw(struct mpls_te_link *lp, float fp)
{
  /* Note that TLV-length field is the size of array. */
  lp->ava_bw.header.type = htons(TE_LINK_SUBTLV_AVA_BW);
  lp->ava_bw.header.length = htons(TE_LINK_SUBTLV_DEF_SIZE);
  lp->ava_bw.value = htonf(fp);
  return;
}

static void set_linkparams_use_bw(struct mpls_te_link *lp, float fp)
{
  /* Note that TLV-length field is the size of array. */
  lp->use_bw.header.type = htons(TE_LINK_SUBTLV_USE_BW);
  lp->use_bw.header.length = htons(TE_LINK_SUBTLV_DEF_SIZE);
  lp->use_bw.value = htonf(fp);
  return;
}

/* Update TE parameters from Interface */
static void update_linkparams(struct mpls_te_link *lp)
{
  int i;
  struct interface *ifp;

  /* Get the Interface structure */
  if ((ifp = lp->ifp) == NULL) {
    ote_debug(
      "MPLS-TE (%s): Abort update TE parameters: no interface associated to Link Parameters",
      __func__);
    return;
  }
  if (!HAS_LINK_PARAMS(ifp)) {
    ote_debug(
      "MPLS-TE (%s): Abort update TE parameters: no Link Parameters for interface",
      __func__);
    return;
  }

  /* RFC3630 metrics */
  if (IS_PARAM_SET(ifp->link_params, LP_ADM_GRP))
    set_linkparams_rsc_clsclr(lp, ifp->link_params->admin_grp);
  else
    TLV_TYPE(lp->rsc_clsclr) = 0;

  if (IS_PARAM_SET(ifp->link_params, LP_MAX_BW))
    set_linkparams_max_bw(lp, ifp->link_params->max_bw);
  else
    TLV_TYPE(lp->max_bw) = 0;

  if (IS_PARAM_SET(ifp->link_params, LP_MAX_RSV_BW))
    set_linkparams_max_rsv_bw(lp, ifp->link_params->max_rsv_bw);
  else
    TLV_TYPE(lp->max_rsv_bw) = 0;

  if (IS_PARAM_SET(ifp->link_params, LP_UNRSV_BW))
    for (i = 0; i < MAX_CLASS_TYPE; i++)
      set_linkparams_unrsv_bw(lp, i,
            ifp->link_params->unrsv_bw[i]);
  else
    TLV_TYPE(lp->unrsv_bw) = 0;

  if (IS_PARAM_SET(ifp->link_params, LP_TE_METRIC))
    set_linkparams_te_metric(lp, ifp->link_params->te_metric);
  else
    TLV_TYPE(lp->te_metric) = 0;

  /* TE metric Extensions */
  if (IS_PARAM_SET(ifp->link_params, LP_DELAY))
    set_linkparams_av_delay(lp, ifp->link_params->av_delay, 0);
  else
    TLV_TYPE(lp->av_delay) = 0;

  if (IS_PARAM_SET(ifp->link_params, LP_MM_DELAY))
    set_linkparams_mm_delay(lp, ifp->link_params->min_delay,
          ifp->link_params->max_delay, 0);
  else
    TLV_TYPE(lp->mm_delay) = 0;

  if (IS_PARAM_SET(ifp->link_params, LP_DELAY_VAR))
    set_linkparams_delay_var(lp, ifp->link_params->delay_var);
  else
    TLV_TYPE(lp->delay_var) = 0;

  if (IS_PARAM_SET(ifp->link_params, LP_PKT_LOSS))
    set_linkparams_pkt_loss(lp, ifp->link_params->pkt_loss, 0);
  else
    TLV_TYPE(lp->pkt_loss) = 0;

  if (IS_PARAM_SET(ifp->link_params, LP_RES_BW))
    set_linkparams_res_bw(lp, ifp->link_params->res_bw);
  else
    TLV_TYPE(lp->res_bw) = 0;

  if (IS_PARAM_SET(ifp->link_params, LP_AVA_BW))
    set_linkparams_ava_bw(lp, ifp->link_params->ava_bw);
  else
    TLV_TYPE(lp->ava_bw) = 0;

  if (IS_PARAM_SET(ifp->link_params, LP_USE_BW))
    set_linkparams_use_bw(lp, ifp->link_params->use_bw);
  else
    TLV_TYPE(lp->use_bw) = 0;

  /* RFC5392 */
  if (IS_PARAM_SET(ifp->link_params, LP_RMT_AS)) {
    /* Flush LSA if it engaged and was previously a STD_TE one */
    if (IS_STD_TE(lp->type)
        && CHECK_FLAG(lp->flags, LPFLG_LSA_ENGAGED)) {
      ote_debug(
        "MPLS-TE (%s): Update IF: Switch from Standard LSA to INTER-AS for %s[%d/%d]",
        __func__, ifp->name, lp->flags, lp->type);

      ospf_mpls_te_lsa_schedule(lp, FLUSH_THIS_LSA);
      /* Then, switch it to INTER-AS */
      if (OspfMplsTE.inter_as == AS) {
        lp->type = INTER_AS;
        SET_FLAG(lp->flags, LPFLG_LSA_FLOOD_AS);
      } else {
        lp->type = INTER_AS;
        UNSET_FLAG(lp->flags, LPFLG_LSA_FLOOD_AS);
        lp->area = ospf_area_lookup_by_area_id(
          ospf_lookup_by_vrf_id(VRF_DEFAULT),
          OspfMplsTE.interas_areaid);
      }
    }
    set_linkparams_inter_as(lp, ifp->link_params->rmt_ip,
          ifp->link_params->rmt_as);
  } else {
    ote_debug(
      "MPLS-TE (%s): Update IF: Switch from INTER-AS LSA to Standard for %s[%d/%d]",
      __func__, ifp->name, lp->flags, lp->type);

    /* reset inter-as TE params */
    /* Flush LSA if it engaged and was previously an INTER_AS one */
    if (IS_INTER_AS(lp->type)
        && CHECK_FLAG(lp->flags, LPFLG_LSA_ENGAGED)) {
      ospf_mpls_te_lsa_schedule(lp, FLUSH_THIS_LSA);
      /* Then, switch it to Standard TE */
      lp->flags = STD_TE;
      UNSET_FLAG(lp->flags, LPFLG_LSA_FLOOD_AS);
    }
    unset_linkparams_inter_as(lp);
  }
}

static void initialize_linkparams(struct mpls_te_link *lp)
{
  struct interface *ifp = lp->ifp;
  struct ospf_interface *oi = NULL;
  struct route_node *rn;

  ote_debug("MPLS-TE (%s): Initialize Link Parameters for interface %s",
      __func__, ifp->name);

  /* Search OSPF Interface parameters for this interface */
  for (rn = route_top(IF_OIFS(ifp)); rn; rn = route_next(rn)) {

    if ((oi = rn->info) == NULL)
      continue;

    if (oi->ifp == ifp)
      break;
  }

  if ((oi == NULL) || (oi->ifp != ifp)) {
    ote_debug(
      "MPLS-TE (%s): Could not find corresponding OSPF Interface for %s",
      __func__, ifp->name);
    return;
  }

  /*
   * Try to set initial values those can be derived from
   * zebra-interface information.
   */
  set_linkparams_link_type(oi, lp);

  /* Set local IP addr */
  set_linkparams_lclif_ipaddr(lp, oi->address->u.prefix4);

  /* Set Remote IP addr if Point to Point Interface */
  if (oi->type == OSPF_IFTYPE_POINTOPOINT) {
    struct prefix *pref = CONNECTED_PREFIX(oi->connected);
    if (pref != NULL)
      set_linkparams_rmtif_ipaddr(lp, pref->u.prefix4);
  }

  /* Keep Area information in combination with link parameters. */
  lp->area = oi->area;

  return;
}

static int is_mandated_params_set(struct mpls_te_link *lp)
{
  int rc = 0;

  if (ntohs(OspfMplsTE.router_addr.header.type) == 0) {
    flog_warn(EC_OSPF_TE_UNEXPECTED,
        "MPLS-TE (%s): Missing Router Address", __func__);
    return rc;
  }

  if (ntohs(lp->link_type.header.type) == 0) {
    flog_warn(EC_OSPF_TE_UNEXPECTED,
        "MPLS-TE (%s): Missing Link Type", __func__);
    return rc;
  }

  if (!IS_INTER_AS(lp->type) && (ntohs(lp->link_id.header.type) == 0)) {
    flog_warn(EC_OSPF_TE_UNEXPECTED, "MPLS-TE (%s) Missing Link ID",
        __func__);
    return rc;
  }

  rc = 1;
  return rc;
}

/*------------------------------------------------------------------------*
 * Following are callback functions against generic Opaque-LSAs handling.
 *------------------------------------------------------------------------*/

static int ospf_mpls_te_new_if(struct interface *ifp)
{
  struct mpls_te_link *new;

  ote_debug("MPLS-TE (%s): Add new %s interface %s to MPLS-TE list",
      __func__, ifp->link_params ? "Active" : "Inactive",
      ifp->name);

  if (lookup_linkparams_by_ifp(ifp) != NULL)
    return 0;

  new = XCALLOC(MTYPE_OSPF_MPLS_TE, sizeof(struct mpls_te_link));

  new->instance = get_mpls_te_instance_value();
  new->ifp = ifp;
  /* By default TE-Link is RFC3630 compatible flooding in Area and not
   * active */
  /* This default behavior will be adapted with call to
   * ospf_mpls_te_update_if() */
  new->type = STD_TE;
  new->flags = LPFLG_LSA_INACTIVE;

  /* Initialize Link Parameters from Interface */
  initialize_linkparams(new);

  /* Set TE Parameters from Interface */
  update_linkparams(new);

  /* Add Link Parameters structure to the list */
  listnode_add(OspfMplsTE.iflist, new);

  ote_debug("MPLS-TE (%s): Add new LP context for %s[%d/%d]", __func__,
      ifp->name, new->flags, new->type);

  /* Schedule Opaque-LSA refresh. */ /* XXX */
  return 0;
}

static int ospf_mpls_te_del_if(struct interface *ifp)
{
  struct mpls_te_link *lp;
  int rc = -1;

  if ((lp = lookup_linkparams_by_ifp(ifp)) != NULL) {
    struct list *iflist = OspfMplsTE.iflist;

    /* Dequeue listnode entry from the list. */
    listnode_delete(iflist, lp);

    XFREE(MTYPE_OSPF_MPLS_TE, lp);
  }

  /* Schedule Opaque-LSA refresh. */ /* XXX */

  rc = 0;
  return rc;
}

/* Main initialization / update function of the MPLS TE Link context */

/* Call when interface TE Link parameters are modified */
void ospf_mpls_te_update_if(struct interface *ifp)
{
  struct mpls_te_link *lp;

  ote_debug("MPLS-TE (%s): Update LSA parameters for interface %s [%s]",
      __func__, ifp->name, HAS_LINK_PARAMS(ifp) ? "ON" : "OFF");

  /* Get Link context from interface */
  if ((lp = lookup_linkparams_by_ifp(ifp)) == NULL) {
    flog_warn(
      EC_OSPF_TE_UNEXPECTED,
      "MPLS-TE (%s): Did not find Link Parameters context for interface %s",
      __func__, ifp->name);
    return;
  }

  /* Fulfill MPLS-TE Link TLV from Interface TE Link parameters */
  if (HAS_LINK_PARAMS(ifp)) {
    SET_FLAG(lp->flags, LPFLG_LSA_ACTIVE);

    /* Update TE parameters */
    update_linkparams(lp);

    /* Finally Re-Originate or Refresh Opaque LSA if MPLS_TE is
     * enabled */
    if (OspfMplsTE.enabled)
      if (lp->area != NULL) {
        if (CHECK_FLAG(lp->flags, LPFLG_LSA_ENGAGED))
          ospf_mpls_te_lsa_schedule(
            lp, REFRESH_THIS_LSA);
        else
          ospf_mpls_te_lsa_schedule(
            lp, REORIGINATE_THIS_LSA);
      }
  } else {
    /* If MPLS TE is disable on this interface, flush LSA if it is
     * already engaged */
    if (CHECK_FLAG(lp->flags, LPFLG_LSA_ENGAGED))
      ospf_mpls_te_lsa_schedule(lp, FLUSH_THIS_LSA);
    else
      /* Reset Activity flag */
      lp->flags = LPFLG_LSA_INACTIVE;
  }

  return;
}

/*
 * Just add interface and set available information. Other information
 * and flooding of LSA will be done later when adjacency will be up
 * See ospf_mpls_te_nsm_change() after
 */
static void ospf_mpls_te_ism_change(struct ospf_interface *oi, int old_state)
{

  struct mpls_te_link *lp;

  lp = lookup_linkparams_by_ifp(oi->ifp);
  if (lp == NULL) {
    flog_warn(
      EC_OSPF_TE_UNEXPECTED,
      "MPLS-TE (%s): Cannot get linkparams from OI(%s)?",
      __func__, IF_NAME(oi));
    return;
  }

  if (oi->area == NULL || oi->area->ospf == NULL) {
    flog_warn(
      EC_OSPF_TE_UNEXPECTED,
      "MPLS-TE (%s): Cannot refer to OSPF from OI(%s)?",
      __func__, IF_NAME(oi));
    return;
  }

  /* Keep Area information in combination with linkparams. */
  lp->area = oi->area;

  switch (oi->state) {
  case ISM_PointToPoint:
  case ISM_DROther:
  case ISM_Backup:
  case ISM_DR:
    /* Set Link type and Local IP addr */
    set_linkparams_link_type(oi, lp);
    set_linkparams_lclif_ipaddr(lp, oi->address->u.prefix4);

    break;
  case ISM_Down:
    /* Interface goes Down: Flush LSA if engaged */
    if (CHECK_FLAG(lp->flags, LPFLG_LSA_ENGAGED)) {
      ote_debug(
        "MPLS-TE (%s): Interface %s goes down: flush LSA",
        __func__, IF_NAME(oi));
      ospf_mpls_te_lsa_schedule(lp, FLUSH_THIS_LSA);
      return;
    }
    break;
  default:
    break;
  }

  ote_debug("MPLS-TE (%s): Update Link parameters for interface %s",
      __func__, IF_NAME(oi));

  return;
}

/*
 * Complete TE info and schedule LSA flooding
 * Link-ID and Remote IP address must be set with neighbor info
 * which are only valid once NSM state is FULL
 */
static void ospf_mpls_te_nsm_change(struct ospf_neighbor *nbr, int old_state)
{
  struct ospf_interface *oi = nbr->oi;
  struct mpls_te_link *lp;

  /* Process Neighbor only when its state is NSM Full */
  if (nbr->state != NSM_Full)
    return;

  /* Get interface information for Traffic Engineering */
  lp = lookup_linkparams_by_ifp(oi->ifp);
  if (lp == NULL) {
    flog_warn(
      EC_OSPF_TE_UNEXPECTED,
      "MPLS-TE (%s): Cannot get linkparams from OI(%s)?",
      __func__, IF_NAME(oi));
    return;
  }

  if (oi->area == NULL || oi->area->ospf == NULL) {
    flog_warn(
      EC_OSPF_TE_UNEXPECTED,
      "MPLS-TE (%s): Cannot refer to OSPF from OI(%s)?",
      __func__, IF_NAME(oi));
    return;
  }

  /* Flush TE Opaque LSA if Neighbor State goes Down or Deleted */
  if (OspfMplsTE.enabled
      && (nbr->state == NSM_Down || nbr->state == NSM_Deleted)) {
    if (CHECK_FLAG(lp->flags, EXT_LPFLG_LSA_ENGAGED)) {
      ote_debug(
        "MPLS-TE (%s): Interface %s goes down: flush LSA",
        __func__, IF_NAME(oi));
      ospf_mpls_te_lsa_schedule(lp, FLUSH_THIS_LSA);
    }
    return;
  }

  /* Keep Area information in combination with SR info. */
  lp->area = oi->area;

  /*
   * The Link ID is identical to the contents of the Link ID field
   * in the Router LSA for these link types.
   */
  switch (oi->state) {
  case ISM_PointToPoint:
    /* Set Link ID with neighbor Router ID */
    set_linkparams_link_id(lp, nbr->router_id);
    /* Set Remote IP address */
    set_linkparams_rmtif_ipaddr(lp, nbr->address.u.prefix4);
    break;

  case ISM_DR:
  case ISM_DROther:
  case ISM_Backup:
    /* Set Link ID with the Designated Router ID */
    set_linkparams_link_id(lp, DR(oi));
    break;

  case ISM_Down:
    /* State goes Down: Flush LSA if engaged */
    if (OspfMplsTE.enabled
        && CHECK_FLAG(lp->flags, LPFLG_LSA_ENGAGED)) {
      ote_debug(
        "MPLS-TE (%s): Interface %s goes down: flush LSA",
        __func__, IF_NAME(oi));
      ospf_mpls_te_lsa_schedule(lp, FLUSH_THIS_LSA);
    }
    return;
  default:
    break;
  }

  ote_debug("MPLS-TE (%s): Add Link-ID %pI4 for interface %s ", __func__,
      &lp->link_id.value, oi->ifp->name);

  /* Try to Schedule LSA */
  if (OspfMplsTE.enabled) {
    if (CHECK_FLAG(lp->flags, LPFLG_LSA_ENGAGED))
      ospf_mpls_te_lsa_schedule(lp, REFRESH_THIS_LSA);
    else
      ospf_mpls_te_lsa_schedule(lp, REORIGINATE_THIS_LSA);
  }
  return;
}

/*------------------------------------------------------------------------*
 * Following are OSPF protocol processing functions for MPLS-TE LSA.
 *------------------------------------------------------------------------*/

static void build_tlv_header(struct stream *s, struct tlv_header *tlvh)
{
  stream_put(s, tlvh, sizeof(struct tlv_header));
  return;
}

static void build_router_tlv(struct stream *s)
{
  struct tlv_header *tlvh = &OspfMplsTE.router_addr.header;
  if (ntohs(tlvh->type) != 0) {
    build_tlv_header(s, tlvh);
    stream_put(s, TLV_DATA(tlvh), TLV_BODY_SIZE(tlvh));
  }
  return;
}

static void build_link_subtlv(struct stream *s, struct tlv_header *tlvh)
{

  if ((tlvh != NULL) && (ntohs(tlvh->type) != 0)) {
    build_tlv_header(s, tlvh);
    stream_put(s, TLV_DATA(tlvh), TLV_BODY_SIZE(tlvh));
  }
  return;
}

static void build_link_tlv(struct stream *s, struct mpls_te_link *lp)
{
  set_linkparams_link_header(lp);
  build_tlv_header(s, &lp->link_header.header);

  build_link_subtlv(s, &lp->link_type.header);
  build_link_subtlv(s, &lp->link_id.header);
  build_link_subtlv(s, &lp->lclif_ipaddr.header);
  build_link_subtlv(s, &lp->rmtif_ipaddr.header);
  build_link_subtlv(s, &lp->te_metric.header);
  build_link_subtlv(s, &lp->max_bw.header);
  build_link_subtlv(s, &lp->max_rsv_bw.header);
  build_link_subtlv(s, &lp->unrsv_bw.header);
  build_link_subtlv(s, &lp->rsc_clsclr.header);
  build_link_subtlv(s, &lp->lrrid.header);
  build_link_subtlv(s, &lp->llri.header);
  build_link_subtlv(s, &lp->rip.header);
  build_link_subtlv(s, &lp->ras.header);
  build_link_subtlv(s, &lp->av_delay.header);
  build_link_subtlv(s, &lp->mm_delay.header);
  build_link_subtlv(s, &lp->delay_var.header);
  build_link_subtlv(s, &lp->pkt_loss.header);
  build_link_subtlv(s, &lp->res_bw.header);
  build_link_subtlv(s, &lp->ava_bw.header);
  build_link_subtlv(s, &lp->use_bw.header);

  return;
}

static void ospf_mpls_te_lsa_body_set(struct stream *s, struct mpls_te_link *lp)
{
  /*
   * The router address TLV is type 1, and ... It must appear in exactly
   * one Traffic Engineering LSA originated by a router but not in
   * Inter-AS TLV.
   */
  if (!IS_INTER_AS(lp->type))
    build_router_tlv(s);

  /*
   * Only one Link TLV shall be carried in each LSA, allowing for fine
   * granularity changes in topology.
   */
  build_link_tlv(s, lp);
  return;
}

/* Create new opaque-LSA. */
static struct ospf_lsa *ospf_mpls_te_lsa_new(struct ospf *ospf,
               struct ospf_area *area,
               struct mpls_te_link *lp)
{
  struct stream *s;
  struct lsa_header *lsah;
  struct ospf_lsa *new = NULL;
  uint8_t options, lsa_type = 0;
  struct in_addr lsa_id;
  uint32_t tmp;
  uint16_t length;

  /* Create a stream for LSA. */
  s = stream_new(OSPF_MAX_LSA_SIZE);
  lsah = (struct lsa_header *)STREAM_DATA(s);

  options = OSPF_OPTION_O; /* Don't forget this :-) */

  /* Set opaque-LSA header fields depending of the type of RFC */
  if (IS_INTER_AS(lp->type)) {
    if (IS_FLOOD_AS(lp->flags)) {
      /* Enable AS external as we flood Inter-AS with Opaque
       * Type 11
       */
      options |= OSPF_OPTION_E;
      lsa_type = OSPF_OPAQUE_AS_LSA;
    } else {
      options |= LSA_OPTIONS_GET(
        area); /* Get area default option */
      options |= LSA_OPTIONS_NSSA_GET(area);
      lsa_type = OSPF_OPAQUE_AREA_LSA;
    }
    tmp = SET_OPAQUE_LSID(OPAQUE_TYPE_INTER_AS_LSA, lp->instance);
    lsa_id.s_addr = htonl(tmp);

    if (!ospf) {
      stream_free(s);
      return NULL;
    }

    lsa_header_set(s, options, lsa_type, lsa_id, ospf->router_id);
  } else {
    options |= LSA_OPTIONS_GET(area); /* Get area default option */
    options |= LSA_OPTIONS_NSSA_GET(area);
    lsa_type = OSPF_OPAQUE_AREA_LSA;
    tmp = SET_OPAQUE_LSID(OPAQUE_TYPE_TRAFFIC_ENGINEERING_LSA,
              lp->instance);
    lsa_id.s_addr = htonl(tmp);
    lsa_header_set(s, options, lsa_type, lsa_id,
             area->ospf->router_id);
  }

  ote_debug(
    "MPLS-TE (%s): LSA[Type%d:%pI4]: Create an Opaque-LSA/MPLS-TE instance",
    __func__, lsa_type, &lsa_id);

  /* Set opaque-LSA body fields. */
  ospf_mpls_te_lsa_body_set(s, lp);

  /* Set length. */
  length = stream_get_endp(s);
  lsah->length = htons(length);

  /* Now, create an OSPF LSA instance. */
  new = ospf_lsa_new_and_data(length);

  new->area = area;
  new->vrf_id = VRF_DEFAULT;

  SET_FLAG(new->flags, OSPF_LSA_SELF);
  memcpy(new->data, lsah, length);
  stream_free(s);

  return new;
}

static int ospf_mpls_te_lsa_originate1(struct ospf_area *area,
               struct mpls_te_link *lp)
{
  struct ospf_lsa *new = NULL;
  int rc = -1;

  /* Create new Opaque-LSA/MPLS-TE instance. */
  new = ospf_mpls_te_lsa_new(area->ospf, area, lp);
  if (new == NULL) {
    flog_warn(EC_OSPF_TE_UNEXPECTED,
        "MPLS-TE (%s): ospf_mpls_te_lsa_new() ?", __func__);
    return rc;
  }

  /* Install this LSA into LSDB. */
  if (ospf_lsa_install(area->ospf, NULL /*oi*/, new) == NULL) {
    flog_warn(EC_OSPF_LSA_INSTALL_FAILURE,
        "MPLS-TE (%s): ospf_lsa_install() ?", __func__);
    ospf_lsa_unlock(&new);
    return rc;
  }

  /* Now this link-parameter entry has associated LSA. */
  SET_FLAG(lp->flags, LPFLG_LSA_ENGAGED);
  /* Update new LSA origination count. */
  area->ospf->lsa_originate_count++;

  /* Flood new LSA through area. */
  ospf_flood_through_area(area, NULL /*nbr*/, new);

  ote_debug(
    "MPLS-TE (%s): LSA[Type%d:%pI4]: Originate Opaque-LSA/MPLS-TE: Area(%pI4), Link(%s)",
    __func__, new->data->type, &new->data->id, &area->area_id,
    lp->ifp->name);
  if (IS_DEBUG_OSPF(lsa, LSA_GENERATE))
    ospf_lsa_header_dump(new->data);

  rc = 0;
  return rc;
}

static int ospf_mpls_te_lsa_originate_area(void *arg)
{
  struct ospf_area *area = (struct ospf_area *)arg;
  struct listnode *node, *nnode;
  struct mpls_te_link *lp;
  int rc = -1;

  if (!OspfMplsTE.enabled) {
    ote_debug("MPLS-TE (%s): MPLS-TE is disabled now.", __func__);
    rc = 0; /* This is not an error case. */
    return rc;
  }

  for (ALL_LIST_ELEMENTS(OspfMplsTE.iflist, node, nnode, lp)) {
    /* Process only enabled LSA with area scope flooding */
    if (!CHECK_FLAG(lp->flags, LPFLG_LSA_ACTIVE)
        || IS_FLOOD_AS(lp->flags))
      continue;

    if (lp->area == NULL)
      continue;

    if (!IPV4_ADDR_SAME(&lp->area->area_id, &area->area_id))
      continue;

    if (CHECK_FLAG(lp->flags, LPFLG_LSA_ENGAGED)) {
      if (CHECK_FLAG(lp->flags, LPFLG_LSA_FORCED_REFRESH)) {
        UNSET_FLAG(lp->flags, LPFLG_LSA_FORCED_REFRESH);
        ote_debug(
          "MPLS-TE (%s): Refresh instead of Originate",
          __func__);
        ospf_mpls_te_lsa_schedule(lp, REFRESH_THIS_LSA);
      }
      continue;
    }

    if (!is_mandated_params_set(lp)) {
      ote_debug(
        "MPLS-TE (%s): Link(%s) lacks some mandated MPLS-TE parameters.",
        __func__, lp->ifp ? lp->ifp->name : "?");
      continue;
    }

    /* Ok, let's try to originate an LSA for this area and Link. */
    ote_debug(
      "MPLS-TE (%s): Let's finally reoriginate the LSA %d through the Area %pI4 for Link %s",
      __func__, lp->instance, &area->area_id,
      lp->ifp ? lp->ifp->name : "?");
    if (ospf_mpls_te_lsa_originate1(area, lp) != 0)
      return rc;
  }

  rc = 0;
  return rc;
}

static int ospf_mpls_te_lsa_originate2(struct ospf *top,
               struct mpls_te_link *lp)
{
  struct ospf_lsa *new;
  int rc = -1;

  /* Create new Opaque-LSA/Inter-AS instance. */
  new = ospf_mpls_te_lsa_new(top, NULL, lp);
  if (new == NULL) {
    flog_warn(EC_OSPF_LSA_UNEXPECTED,
        "MPLS-TE (%s): ospf_router_info_lsa_new() ?",
        __func__);
    return rc;
  }

  /* Install this LSA into LSDB. */
  if (ospf_lsa_install(top, NULL /*oi */, new) == NULL) {
    flog_warn(EC_OSPF_LSA_INSTALL_FAILURE,
        "MPLS-TE (%s): ospf_lsa_install() ?", __func__);
    ospf_lsa_unlock(&new);
    return rc;
  }

  /* Now this Router Info parameter entry has associated LSA. */
  SET_FLAG(lp->flags, LPFLG_LSA_ENGAGED);
  /* Update new LSA origination count. */
  top->lsa_originate_count++;

  /* Flood new LSA through AS. */
  ospf_flood_through_as(top, NULL /*nbr */, new);

  ote_debug(
    "MPLS-TE (%s): LSA[Type%d:%pI4]: Originate Opaque-LSA/MPLS-TE Inter-AS",
    __func__, new->data->type, &new->data->id);
  if (IS_DEBUG_OSPF(lsa, LSA_GENERATE))
    ospf_lsa_header_dump(new->data);


  rc = 0;
  return rc;
}

static int ospf_mpls_te_lsa_originate_as(void *arg)
{
  struct ospf *top;
  struct ospf_area *area;
  struct listnode *node, *nnode;
  struct mpls_te_link *lp;
  int rc = -1;

  if ((!OspfMplsTE.enabled) || (OspfMplsTE.inter_as == Off)) {
    ote_debug("MPLS-TE (%s): Inter-AS is disabled for now",
        __func__);
    rc = 0; /* This is not an error case. */
    return rc;
  }

  for (ALL_LIST_ELEMENTS(OspfMplsTE.iflist, node, nnode, lp)) {
    /* Process only enabled INTER_AS Links or Pseudo-Links */
    if (!CHECK_FLAG(lp->flags, LPFLG_LSA_ACTIVE)
        || !CHECK_FLAG(lp->flags, LPFLG_LSA_FLOOD_AS)
        || !IS_INTER_AS(lp->type))
      continue;

    if (CHECK_FLAG(lp->flags, LPFLG_LSA_ENGAGED)) {
      if (CHECK_FLAG(lp->flags, LPFLG_LSA_FORCED_REFRESH)) {
        UNSET_FLAG(lp->flags, LPFLG_LSA_FORCED_REFRESH);
        ospf_mpls_te_lsa_schedule(lp, REFRESH_THIS_LSA);
      }
      continue;
    }

    if (!is_mandated_params_set(lp)) {
      flog_warn(
        EC_OSPF_TE_UNEXPECTED,
        "MPLS-TE (%s): Link(%s) lacks some mandated MPLS-TE parameters.",
        __func__, lp->ifp ? lp->ifp->name : "?");
      continue;
    }

    /* Ok, let's try to originate an LSA for this AS and Link. */
    ote_debug(
      "MPLS-TE (%s): Let's finally re-originate the Inter-AS LSA %d through the %s for Link %s",
      __func__, lp->instance,
      IS_FLOOD_AS(lp->flags) ? "AS" : "Area",
      lp->ifp ? lp->ifp->name : "Unknown");

    if (IS_FLOOD_AS(lp->flags)) {
      top = (struct ospf *)arg;
      ospf_mpls_te_lsa_originate2(top, lp);
    } else {
      area = (struct ospf_area *)arg;
      ospf_mpls_te_lsa_originate1(area, lp);
    }
  }

  rc = 0;
  return rc;
}

/*
 * As Inter-AS LSA must be registered with both AREA and AS flooding, and
 * because all origination callback functions are call (disregarding the Opaque
 * LSA type and Flooding scope) it is necessary to determine which flooding
 * scope is associated with the LSA origination as parameter is of type void and
 * must be cast to struct *ospf for AS flooding and to struct *ospf_area for
 * Area flooding.
 */
static int ospf_mpls_te_lsa_inter_as_as(void *arg)
{
  if (OspfMplsTE.inter_as == AS)
    return ospf_mpls_te_lsa_originate_as(arg);
  else
    return 0;
}

static int ospf_mpls_te_lsa_inter_as_area(void *arg)
{
  if (OspfMplsTE.inter_as == Area)
    return ospf_mpls_te_lsa_originate_area(arg);
  else
    return 0;
}

static struct ospf_lsa *ospf_mpls_te_lsa_refresh(struct ospf_lsa *lsa)
{
  struct mpls_te_link *lp;
  struct ospf_area *area = lsa->area;
  struct ospf *top;
  struct ospf_lsa *new = NULL;

  if (!OspfMplsTE.enabled) {
    /*
     * This LSA must have flushed before due to MPLS-TE status
     * change.
     * It seems a slip among routers in the routing domain.
     */
    ote_debug("MPLS-TE (%s): MPLS-TE is disabled now", __func__);
    lsa->data->ls_age =
      htons(OSPF_LSA_MAXAGE); /* Flush it anyway. */
  }

  /* At first, resolve lsa/lp relationship. */
  if ((lp = lookup_linkparams_by_instance(lsa)) == NULL) {
    flog_warn(EC_OSPF_TE_UNEXPECTED,
        "MPLS-TE (%s): Invalid parameter?", __func__);
    lsa->data->ls_age =
      htons(OSPF_LSA_MAXAGE); /* Flush it anyway. */
    ospf_opaque_lsa_flush_schedule(lsa);
    return NULL;
  }

  /* Check if lp was not disable in the interval */
  if (!CHECK_FLAG(lp->flags, LPFLG_LSA_ACTIVE)) {
    flog_warn(EC_OSPF_TE_UNEXPECTED,
        "MPLS-TE (%s): lp was disabled: Flush it!", __func__);
    lsa->data->ls_age =
      htons(OSPF_LSA_MAXAGE); /* Flush it anyway. */
  }

  /* If the lsa's age reached to MaxAge, start flushing procedure. */
  if (IS_LSA_MAXAGE(lsa)) {
    UNSET_FLAG(lp->flags, LPFLG_LSA_ENGAGED);
    ospf_opaque_lsa_flush_schedule(lsa);
    return NULL;
  }
  top = ospf_lookup_by_vrf_id(VRF_DEFAULT);
  /* Create new Opaque-LSA/MPLS-TE instance. */
  new = ospf_mpls_te_lsa_new(top, area, lp);
  if (new == NULL) {
    flog_warn(EC_OSPF_TE_UNEXPECTED,
        "MPLS-TE (%s): ospf_mpls_te_lsa_new() ?", __func__);
    return NULL;
  }
  new->data->ls_seqnum = lsa_seqnum_increment(lsa);

  /* Install this LSA into LSDB. */
  /* Given "lsa" will be freed in the next function. */
  /* As area could be NULL i.e. when using OPAQUE_LSA_AS, we prefer to use
   * ospf_lookup() to get ospf instance */
  if (area)
    top = area->ospf;

  if (ospf_lsa_install(top, NULL /*oi */, new) == NULL) {
    flog_warn(EC_OSPF_LSA_INSTALL_FAILURE,
        "MPLS-TE (%s): ospf_lsa_install() ?", __func__);
    ospf_lsa_unlock(&new);
    return NULL;
  }

  /* Flood updated LSA through AS or Area depending of the RFC of the link
   */
  if (IS_FLOOD_AS(lp->flags))
    ospf_flood_through_as(top, NULL, new);
  else
    ospf_flood_through_area(area, NULL /*nbr*/, new);

  /* Debug logging. */
  ote_debug("MPLS-TE (%s): LSA[Type%d:%pI4]: Refresh Opaque-LSA/MPLS-TE",
      __func__, new->data->type, &new->data->id);
  if (IS_DEBUG_OSPF(lsa, LSA_GENERATE))
    ospf_lsa_header_dump(new->data);

  return new;
}

void ospf_mpls_te_lsa_schedule(struct mpls_te_link *lp, enum lsa_opcode opcode)
{
  struct ospf_lsa lsa;
  struct lsa_header lsah;
  struct ospf *top;
  uint32_t tmp;

  memset(&lsa, 0, sizeof(lsa));
  memset(&lsah, 0, sizeof(lsah));
  top = ospf_lookup_by_vrf_id(VRF_DEFAULT);

  /* Check if the pseudo link is ready to flood */
  if (!CHECK_FLAG(lp->flags, LPFLG_LSA_ACTIVE))
    return;

  ote_debug("MPLS-TE (%s): Schedule %s%s%s LSA for interface %s",
      __func__,
      opcode == REORIGINATE_THIS_LSA ? "Re-Originate" : "",
      opcode == REFRESH_THIS_LSA ? "Refresh" : "",
      opcode == FLUSH_THIS_LSA ? "Flush" : "",
      lp->ifp ? lp->ifp->name : "-");

  lsa.area = lp->area;
  lsa.data = &lsah;
  if (IS_FLOOD_AS(lp->flags)) {
    lsah.type = OSPF_OPAQUE_AS_LSA;
    tmp = SET_OPAQUE_LSID(OPAQUE_TYPE_INTER_AS_LSA, lp->instance);
    lsah.id.s_addr = htonl(tmp);
  } else {
    lsah.type = OSPF_OPAQUE_AREA_LSA;
    if (IS_INTER_AS(lp->type)) {
      /* Set the area context if not know */
      if (lp->area == NULL)
        lp->area = ospf_area_lookup_by_area_id(
          top, OspfMplsTE.interas_areaid);
      /* Unable to set the area context. Abort! */
      if (lp->area == NULL) {
        flog_warn(
          EC_OSPF_TE_UNEXPECTED,
          "MPLS-TE (%s): Area context is null. Abort !",
          __func__);
        return;
      }
      tmp = SET_OPAQUE_LSID(OPAQUE_TYPE_INTER_AS_LSA,
                lp->instance);
    } else
      tmp = SET_OPAQUE_LSID(
        OPAQUE_TYPE_TRAFFIC_ENGINEERING_LSA,
        lp->instance);
    lsah.id.s_addr = htonl(tmp);
  }

  switch (opcode) {
  case REORIGINATE_THIS_LSA:
    if (IS_FLOOD_AS(lp->flags)) {
      ospf_opaque_lsa_reoriginate_schedule(
        (void *)top, OSPF_OPAQUE_AS_LSA,
        OPAQUE_TYPE_INTER_AS_LSA);
    } else {
      if (IS_INTER_AS(lp->type))
        ospf_opaque_lsa_reoriginate_schedule(
          (void *)lp->area, OSPF_OPAQUE_AREA_LSA,
          OPAQUE_TYPE_INTER_AS_LSA);
      else
        ospf_opaque_lsa_reoriginate_schedule(
          (void *)lp->area, OSPF_OPAQUE_AREA_LSA,
          OPAQUE_TYPE_TRAFFIC_ENGINEERING_LSA);
    }
    break;
  case REFRESH_THIS_LSA:
    ospf_opaque_lsa_refresh_schedule(&lsa);
    break;
  case FLUSH_THIS_LSA:
    /* Reset Activity flag */
    lp->flags = LPFLG_LSA_INACTIVE;
    ospf_opaque_lsa_flush_schedule(&lsa);
    break;
  default:
    flog_warn(EC_OSPF_TE_UNEXPECTED,
        "MPLS-TE (%s): Unknown opcode (%u)", __func__,
        opcode);
    break;
  }
}

/**
 * ------------------------------------------------------
 * Following are Link State Data Base control functions.
 * ------------------------------------------------------
 */

/**
 * Get Vertex from TED by the router which advertised the LSA. A new Vertex and
 * associated Link State Node are created if Vertex is not found.
 *
 * @param ted Link State Traffic Engineering Database
 * @param lsa OSPF Link State Advertisement
 *
 * @return  Link State Vertex
 */
static struct ls_vertex *get_vertex(struct ls_ted *ted, struct ospf_lsa *lsa)
{
  struct ls_node_id lnid;
  struct ls_node *lnode;
  struct ls_vertex *vertex;

  /* Sanity Check */
  if (!ted || !lsa || !lsa->data || !lsa->area)
    return NULL;

  /* Search if a Link State Vertex already exist */
  lnid.origin = OSPFv2;
  lnid.id.ip.addr = lsa->data->adv_router;
  lnid.id.ip.area_id = lsa->area->area_id;
  vertex = ls_find_vertex_by_id(ted, lnid);

  /* Create Node & Vertex in the Link State Date Base if not found */
  if (!vertex) {
    const struct in_addr inaddr_any = {.s_addr = INADDR_ANY};

    lnode = ls_node_new(lnid, inaddr_any, in6addr_any);
    snprintfrr(lnode->name, MAX_NAME_LENGTH, "%pI4",
         &lnid.id.ip.addr);
    vertex = ls_vertex_add(ted, lnode);
  }

  if (IS_LSA_SELF(lsa))
    ted->self = vertex;

  return vertex;
}

/**
 * Get Edge from TED by Link State Attribute ID. A new Edge and associated Link
 * State Attributes are created if not found.
 *
 * @param ted   Link State Traffic Engineering Database
 * @param adv   Link State Node ID of router which advertised Edge
 * @param link_id Link State Attribute ID
 *
 * @return    Link State Edge
 */
static struct ls_edge *get_edge(struct ls_ted *ted, struct ls_node_id adv,
        struct in_addr link_id)
{
  struct ls_edge_key key;
  struct ls_edge *edge;
  struct ls_attributes *attr;

  /* Search Edge that corresponds to the Link ID */
  key.family = AF_INET;
  IPV4_ADDR_COPY(&key.k.addr, &link_id);
  edge = ls_find_edge_by_key(ted, key);

  /* Create new one if not exist */
  if (!edge) {
    attr = ls_attributes_new(adv, link_id, in6addr_any, 0);
    edge = ls_edge_add(ted, attr);
  }

  return edge;
}

/**
 * Export Link State information to consumer daemon through ZAPI Link State
 * Opaque Message.
 *
 * @param type    Type of Link State Element i.e. Vertex, Edge or Subnet
 * @param link_state  Pointer to Link State Vertex, Edge or Subnet
 *
 * @return    0 if success, -1 otherwise
 */
static int ospf_te_export(uint8_t type, void *link_state)
{
  struct ls_message msg = {};
  int rc = 0;

  if (!OspfMplsTE.export)
    return rc;

  switch (type) {
  case LS_MSG_TYPE_NODE:
    ls_vertex2msg(&msg, (struct ls_vertex *)link_state);
    rc = ls_send_msg(zclient, &msg, NULL);
    break;
  case LS_MSG_TYPE_ATTRIBUTES:
    ls_edge2msg(&msg, (struct ls_edge *)link_state);
    rc = ls_send_msg(zclient, &msg, NULL);
    break;
  case LS_MSG_TYPE_PREFIX:
    ls_subnet2msg(&msg, (struct ls_subnet *)link_state);
    rc = ls_send_msg(zclient, &msg, NULL);
    break;
  default:
    rc = -1;
    break;
  }

  return rc;
}

/**
 * Update Link State Edge & Attributes from the given Link State Attributes ID
 * and metric. This function is called when parsing Router LSA.
 *
 * @param ted   Link State Traffic Engineering Database
 * @param vertex  Vertex where the Edge is attached as source
 * @param link_data Link State Edge ID
 * @param metric  Standard metric attached to this Edge
 */
static void ospf_te_update_link(struct ls_ted *ted, struct ls_vertex *vertex,
        struct in_addr link_data, uint8_t metric)
{
  struct ls_edge *edge;
  struct ls_attributes *attr;

  /* Sanity check */
  if (!ted || !vertex || !vertex->node)
    return;

  /* Get Corresponding Edge from Link State Data Base */
  edge = get_edge(ted, vertex->node->adv, link_data);
  attr = edge->attributes;

  /* re-attached edge to vertex if needed */
  if (!edge->source)
    edge->source = vertex;

  /* Check if it is just an LSA refresh */
  if ((CHECK_FLAG(attr->flags, LS_ATTR_METRIC)
       && (attr->metric == metric))) {
    edge->status = SYNC;
    return;
  }

  /* Update metric value */
  attr->metric = metric;
  SET_FLAG(attr->flags, LS_ATTR_METRIC);
  if (edge->status != NEW)
    edge->status = UPDATE;

  ote_debug("    |- %s Edge %pI4 with metric %d",
      edge->status == NEW ? "Add" : "Update", &attr->standard.local,
      attr->metric);

  /* Export Link State Edge */
  ospf_te_export(LS_MSG_TYPE_ATTRIBUTES, edge);
  edge->status = SYNC;
}

/**
 * Update Link State Subnet & Prefix from the given prefix and metric. This
 * function is called when parsing Router LSA.
 *
 * @param ted   Link State Traffic Engineering Database
 * @param vertex  Vertex where the Edge is attached as source
 * @param p   Prefix associated to the Subnet
 * @param metric  Standard metric attached to this Edge
 */
static void ospf_te_update_subnet(struct ls_ted *ted, struct ls_vertex *vertex,
          struct prefix *p, uint8_t metric)
{
  struct ls_subnet *subnet;
  struct ls_prefix *ls_pref;

  /* Search if there is a Subnet for this prefix */
  subnet = ls_find_subnet(ted, p);

  /* If found a Subnet, check if it is attached to this Vertex */
  if (subnet) {
    /* Re-attach the subnet to the vertex if necessary */
    if (subnet->vertex != vertex) {
      subnet->vertex = vertex;
      listnode_add_sort_nodup(vertex->prefixes, subnet);
    }
    /* Check if it is a simple refresh */
    ls_pref = subnet->ls_pref;
    if ((CHECK_FLAG(ls_pref->flags, LS_PREF_METRIC))
        && (ls_pref->metric == metric)) {
      subnet->status = SYNC;
      return;
    }
    ls_pref->metric = metric;
    SET_FLAG(ls_pref->flags, LS_PREF_METRIC);
    subnet->status = UPDATE;
  } else {
    /* Create new Link State Prefix  */
    ls_pref = ls_prefix_new(vertex->node->adv, p);
    ls_pref->metric = metric;
    SET_FLAG(ls_pref->flags, LS_PREF_METRIC);
    /* and add it to the TED */
    subnet = ls_subnet_add(ted, ls_pref);
  }

  ote_debug("    |- %s subnet %pFX with metric %d",
      subnet->status == NEW ? "Add" : "Update", &subnet->key,
      ls_pref->metric);

  /* Export Link State Subnet */
  ospf_te_export(LS_MSG_TYPE_PREFIX, subnet);
  subnet->status = SYNC;
}

/**
 * Delete Subnet that correspond to the given IPv4 address and export deletion
 * information before removal. Prefix length is fixed to IPV4_MAX_BITLEN.
 *
 * @param ted Links State Database
 * @param addr  IPv4 address
 */
static void ospf_te_delete_subnet(struct ls_ted *ted, struct in_addr addr)
{
  struct prefix p;
  struct ls_subnet *subnet;

  /* Search subnet that correspond to the address/32 as prefix */
  p.family = AF_INET;
  p.prefixlen = IPV4_MAX_BITLEN;
  p.u.prefix4 = addr;
  subnet = ls_find_subnet(ted, &p);

  /* Remove subnet if found */
  if (subnet) {
    subnet->status = DELETE;
    ospf_te_export(LS_MSG_TYPE_PREFIX, subnet);
    ls_subnet_del_all(ted, subnet);
  }
}

/**
 * Parse Router LSA. This function will create or update corresponding Vertex,
 * Edge and Subnet. It also remove Edge and Subnet if they are marked as Orphan
 * once Router LSA is parsed.
 *
 * @param ted Link State Traffic Engineering Database
 * @param lsa OSPF Link State Advertisement
 *
 * @return  0 if success, -1 otherwise
 */
static int ospf_te_parse_router_lsa(struct ls_ted *ted, struct ospf_lsa *lsa)
{
  struct router_lsa *rl;
  enum ls_node_type type;
  struct ls_vertex *vertex;
  struct ls_edge *edge;
  struct ls_subnet *subnet;
  struct listnode *node;
  int len, links;

  /* Sanity Check */
  if (!ted || !lsa || !lsa->data)
    return -1;

  ote_debug("MPLS-TE (%s): Parse Router LSA[%pI4] from Router[%pI4]",
      __func__, &lsa->data->id, &lsa->data->adv_router);

  /* Get vertex from LSA Advertise Router ID */
  vertex = get_vertex(ted, lsa);

  /* Set Node type information if it has changed */
  rl = (struct router_lsa *)lsa->data;
  if (IS_ROUTER_LSA_VIRTUAL(rl))
    type = PSEUDO;
  else if (IS_ROUTER_LSA_EXTERNAL(rl))
    type = ASBR;
  else if (IS_ROUTER_LSA_BORDER(rl))
    type = ABR;
  else
    type = STANDARD;

  if (vertex->status == NEW) {
    vertex->node->type = type;
    SET_FLAG(vertex->node->flags, LS_NODE_TYPE);
  } else if (vertex->node->type != type) {
    vertex->node->type = type;
    vertex->status = UPDATE;
  }

  /* Check if Vertex has been modified */
  if (vertex->status != SYNC) {
    ote_debug("  |- %s Vertex %pI4",
        vertex->status == NEW ? "Add" : "Update",
        &vertex->node->router_id);

    /* Vertex is out of sync: export it */
    ospf_te_export(LS_MSG_TYPE_NODE, vertex);
    vertex->status = SYNC;
  }

  /* Mark outgoing Edge and Subnet as ORPHAN to detect deletion */
  for (ALL_LIST_ELEMENTS_RO(vertex->outgoing_edges, node, edge))
    edge->status = ORPHAN;

  for (ALL_LIST_ELEMENTS_RO(vertex->prefixes, node, subnet))
    subnet->status = ORPHAN;

  /* Then, process Link Information */
  len = lsa->size - OSPF_LSA_HEADER_SIZE - OSPF_ROUTER_LSA_MIN_SIZE;
  links = ntohs(rl->links);
  for (int i = 0; i < links && len > 0; len -= 12, i++) {
    struct prefix p;
    uint32_t metric;

    switch (rl->link[i].type) {
    case LSA_LINK_TYPE_POINTOPOINT:
      ospf_te_update_link(ted, vertex, rl->link[i].link_data,
              ntohs(rl->link[i].metric));
      /* Add corresponding subnet */
      p.family = AF_INET;
      p.prefixlen = IPV4_MAX_BITLEN;
      p.u.prefix4 = rl->link[i].link_data;
      metric = ntohs(rl->link[i].metric);
      ospf_te_update_subnet(ted, vertex, &p, metric);
      break;
    case LSA_LINK_TYPE_STUB:
      /* Keep only /32 prefix */
      p.prefixlen = ip_masklen(rl->link[i].link_data);
      if (p.prefixlen == IPV4_MAX_BITLEN) {
        p.family = AF_INET;
        p.u.prefix4 = rl->link[i].link_id;
        metric = ntohs(rl->link[i].metric);
        ospf_te_update_subnet(ted, vertex, &p, metric);
      }
      break;
    default:
      break;
    }
  }
  /* Clean remaining Orphan Edges or Subnets */
  if (OspfMplsTE.export)
    ls_vertex_clean(ted, vertex, zclient);
  else
    ls_vertex_clean(ted, vertex, NULL);

  return 0;
}

/**
 * Delete Vertex, Edge and Subnet associated to this Router LSA. This function
 * is called when the router received such LSA with MAX_AGE (Flush) or when the
 * router stop OSPF.
 *
 * @param ted Link State Traffic Engineering Database
 * @param lsa OSPF Link State Advertisement
 *
 * @return  0 if success, -1 otherwise
 */
static int ospf_te_delete_router_lsa(struct ls_ted *ted, struct ospf_lsa *lsa)
{
  struct ls_node_id lnid;
  struct ls_vertex *vertex;

  /* Sanity Check */
  if (!ted || !lsa || !lsa->data)
    return -1;

  /* Search Vertex that corresponds to this LSA */
  lnid.origin = OSPFv2;
  lnid.id.ip.addr = lsa->data->adv_router;
  lnid.id.ip.area_id = lsa->area->area_id;
  vertex = ls_find_vertex_by_id(ted, lnid);
  if (!vertex)
    return -1;

  ote_debug("MPLS-TE (%s): Delete Vertex %pI4 from Router LSA[%pI4]",
      __func__, &vertex->node->router_id, &lsa->data->id);

  /* Export deleted vertex ... */
  vertex->status = DELETE;
  ospf_te_export(LS_MSG_TYPE_NODE, vertex);

  /* ... and remove Node & Vertex from Link State Date Base */
  ls_vertex_del_all(ted, vertex);

  return 0;
}

/**
 * Create or update Remote Vertex that corresponds to the remote ASBR of the
 * foreign network if Edge is associated to an Inter-AS LSA (Type 6).
 *
 * @param ted Link State Traffic Engineering Database
 * @param edge  Link State Edge
 */
static void ospf_te_update_remote_asbr(struct ls_ted *ted, struct ls_edge *edge)
{
  struct ls_node_id lnid;
  struct ls_vertex *vertex;
  struct ls_node *lnode;
  struct ls_attributes *attr;
  struct prefix p;

  /* Sanity Check */
  if (!ted || !edge)
    return;

  /* Search if a Link State Vertex already exist */
  attr = edge->attributes;
  lnid.origin = OSPFv2;
  lnid.id.ip.addr = attr->standard.remote_addr;
  lnid.id.ip.area_id = attr->adv.id.ip.area_id;
  vertex = ls_find_vertex_by_id(ted, lnid);

  /* Create Node & Vertex in the Link State Date Base if not found */
  if (!vertex) {
    const struct in_addr inaddr_any = {.s_addr = INADDR_ANY};

    lnode = ls_node_new(lnid, inaddr_any, in6addr_any);
    snprintfrr(lnode->name, MAX_NAME_LENGTH, "%pI4",
         &lnid.id.ip.addr);
    vertex = ls_vertex_add(ted, lnode);
  }

  /* Update Node information */
  lnode = vertex->node;
  if (CHECK_FLAG(lnode->flags, LS_NODE_TYPE)) {
    if (lnode->type != RMT_ASBR) {
      lnode->type = RMT_ASBR;
      if (vertex->status != NEW)
        vertex->status = UPDATE;
    }
  } else {
    lnode->type = RMT_ASBR;
    SET_FLAG(lnode->flags, LS_NODE_TYPE);
    if (vertex->status != NEW)
      vertex->status = UPDATE;
  }
  if (CHECK_FLAG(lnode->flags, LS_NODE_AS_NUMBER)) {
    if (lnode->as_number != attr->standard.remote_as) {
      lnode->as_number = attr->standard.remote_as;
      if (vertex->status != NEW)
        vertex->status = UPDATE;
    }
  } else {
    lnode->as_number = attr->standard.remote_as;
    SET_FLAG(lnode->flags, LS_NODE_AS_NUMBER);
    if (vertex->status != NEW)
      vertex->status = UPDATE;
  }

  /* Export Link State Vertex if needed */
  if (vertex->status == NEW  || vertex->status == UPDATE) {
    ote_debug("  |- %s Remote Vertex %pI4 for AS %u",
        vertex->status == NEW ? "Add" : "Update",
        &lnode->router_id, lnode->as_number);
    ospf_te_export(LS_MSG_TYPE_NODE, vertex);
    vertex->status = SYNC;
  }

  /* Update corresponding Subnets */
  p.family = AF_INET;
  p.prefixlen = IPV4_MAX_BITLEN;
  p.u.prefix4 = attr->standard.local;
  ospf_te_update_subnet(ted, edge->source, &p, attr->standard.te_metric);

  p.family = AF_INET;
  p.prefixlen = IPV4_MAX_BITLEN;
  p.u.prefix4 = attr->standard.remote_addr;
  ospf_te_update_subnet(ted, vertex, &p, attr->standard.te_metric);

  /* Connect Edge to the remote Vertex */
  if (edge->destination == NULL) {
    edge->destination = vertex;
    listnode_add_sort_nodup(vertex->incoming_edges, edge);
  }

  /* Finally set type to ASBR the node that advertised this Edge ... */
  vertex = edge->source;
  lnode = vertex->node;
  if (CHECK_FLAG(lnode->flags, LS_NODE_TYPE)) {
    if (lnode->type != ASBR) {
      lnode->type = ASBR;
      if (vertex->status != NEW)
        vertex->status = UPDATE;
    }
  } else {
    lnode->type = ASBR;
    SET_FLAG(lnode->flags, LS_NODE_TYPE);
    if (vertex->status != NEW)
      vertex->status = UPDATE;
  }

  /* ... and Export it if needed */
  if (vertex->status == NEW  || vertex->status == UPDATE) {
    ospf_te_export(LS_MSG_TYPE_NODE, vertex);
    vertex->status = SYNC;
  }
}

/**
 * Parse Opaque Traffic Engineering LSA (Type 1) TLVs and create or update the
 * corresponding Link State Edge and Attributes. Vertex connections are also
 * updated if needed based on the remote IP address of the Edge and existing
 * reverse Edge.
 *
 * @param ted Link State Traffic Engineering Database
 * @param lsa OSPF Link State Advertisement
 *
 * @return  0 if success, -1 otherwise
 */
static int ospf_te_parse_te(struct ls_ted *ted, struct ospf_lsa *lsa)
{
  struct ls_edge *edge;
  struct ls_vertex *vertex;
  struct ls_attributes *old, attr = {};
  struct tlv_header *tlvh;
  void *value;
  uint16_t len, sum;
  uint8_t lsa_id;

  /* Initialize Attribute */
  attr.adv.origin = OSPFv2;
  attr.adv.id.ip.addr = lsa->data->adv_router;
  if (lsa->data->type != OSPF_OPAQUE_AS_LSA)
    attr.adv.id.ip.area_id = lsa->area->area_id;

  /* Initialize TLV browsing */
  tlvh = TLV_HDR_TOP(lsa->data);
  len = lsa->size - OSPF_LSA_HEADER_SIZE;

  /* Check if TE Router-ID TLV is present */
  if (ntohs(tlvh->type) == TE_TLV_ROUTER_ADDR) {
    /* if TE Router-ID is alone, we are done ... */
    if (len == TE_LINK_SUBTLV_DEF_SIZE)
      return 0;

    /* ... otherwise, skip it */
    len -= TE_LINK_SUBTLV_DEF_SIZE + TLV_HDR_SIZE;
    tlvh = TLV_HDR_NEXT(tlvh);
  }

  /* Check if we have a valid TE Link TLV */
  if ((len == 0) || (ntohs(tlvh->type) != TE_TLV_LINK))
    return 0;

  sum = sizeof(struct tlv_header);
  /* Browse sub-TLV and fulfill Link State Attributes */
  for (tlvh = TLV_DATA(tlvh); sum < len; tlvh = TLV_HDR_NEXT(tlvh)) {
    uint32_t val32, tab32[2];
    float valf, tabf[8];
    struct in_addr addr;

    value = TLV_DATA(tlvh);
    switch (ntohs(tlvh->type)) {
    case TE_LINK_SUBTLV_LCLIF_IPADDR:
      memcpy(&addr, value, TE_LINK_SUBTLV_DEF_SIZE);
      attr.standard.local = addr;
      SET_FLAG(attr.flags, LS_ATTR_LOCAL_ADDR);
      break;
    case TE_LINK_SUBTLV_RMTIF_IPADDR:
      memcpy(&addr, value, TE_LINK_SUBTLV_DEF_SIZE);
      attr.standard.remote = addr;
      SET_FLAG(attr.flags, LS_ATTR_NEIGH_ADDR);
      break;
    case TE_LINK_SUBTLV_TE_METRIC:
      memcpy(&val32, value, TE_LINK_SUBTLV_DEF_SIZE);
      attr.standard.te_metric = ntohl(val32);
      SET_FLAG(attr.flags, LS_ATTR_TE_METRIC);
      break;
    case TE_LINK_SUBTLV_MAX_BW:
      memcpy(&valf, value, TE_LINK_SUBTLV_DEF_SIZE);
      attr.standard.max_bw = ntohf(valf);
      SET_FLAG(attr.flags, LS_ATTR_MAX_BW);
      break;
    case TE_LINK_SUBTLV_MAX_RSV_BW:
      memcpy(&valf, value, TE_LINK_SUBTLV_DEF_SIZE);
      attr.standard.max_rsv_bw = ntohf(valf);
      SET_FLAG(attr.flags, LS_ATTR_MAX_RSV_BW);
      break;
    case TE_LINK_SUBTLV_UNRSV_BW:
      memcpy(tabf, value, TE_LINK_SUBTLV_UNRSV_SIZE);
      for (int i = 0; i < MAX_CLASS_TYPE; i++)
        attr.standard.unrsv_bw[i] = ntohf(tabf[i]);
      SET_FLAG(attr.flags, LS_ATTR_UNRSV_BW);
      break;
    case TE_LINK_SUBTLV_RSC_CLSCLR:
      memcpy(&val32, value, TE_LINK_SUBTLV_DEF_SIZE);
      attr.standard.admin_group = ntohl(val32);
      SET_FLAG(attr.flags, LS_ATTR_ADM_GRP);
      break;
    case TE_LINK_SUBTLV_LLRI:
      memcpy(tab32, value, TE_LINK_SUBTLV_LLRI_SIZE);
      attr.standard.local_id = ntohl(tab32[0]);
      attr.standard.remote_id = ntohl(tab32[1]);
      SET_FLAG(attr.flags, LS_ATTR_LOCAL_ID);
      SET_FLAG(attr.flags, LS_ATTR_NEIGH_ID);
      break;
    case TE_LINK_SUBTLV_RIP:
      memcpy(&addr, value, TE_LINK_SUBTLV_DEF_SIZE);
      attr.standard.remote_addr = addr;
      SET_FLAG(attr.flags, LS_ATTR_REMOTE_ADDR);
      break;
    case TE_LINK_SUBTLV_RAS:
      memcpy(&val32, value, TE_LINK_SUBTLV_DEF_SIZE);
      attr.standard.remote_as = ntohl(val32);
      SET_FLAG(attr.flags, LS_ATTR_REMOTE_AS);
      break;
    case TE_LINK_SUBTLV_AV_DELAY:
      memcpy(&val32, value, TE_LINK_SUBTLV_DEF_SIZE);
      attr.extended.delay = ntohl(val32);
      SET_FLAG(attr.flags, LS_ATTR_DELAY);
      break;
    case TE_LINK_SUBTLV_MM_DELAY:
      memcpy(tab32, value, TE_LINK_SUBTLV_MM_DELAY_SIZE);
      attr.extended.min_delay = ntohl(tab32[0]);
      attr.extended.max_delay = ntohl(tab32[1]);
      SET_FLAG(attr.flags, LS_ATTR_MIN_MAX_DELAY);
      break;
    case TE_LINK_SUBTLV_DELAY_VAR:
      memcpy(&val32, value, TE_LINK_SUBTLV_DEF_SIZE);
      attr.extended.jitter = ntohl(val32);
      SET_FLAG(attr.flags, LS_ATTR_JITTER);
      break;
    case TE_LINK_SUBTLV_PKT_LOSS:
      memcpy(&val32, value, TE_LINK_SUBTLV_DEF_SIZE);
      attr.extended.pkt_loss = ntohl(val32);
      SET_FLAG(attr.flags, LS_ATTR_PACKET_LOSS);
      break;
    case TE_LINK_SUBTLV_RES_BW:
      memcpy(&valf, value, TE_LINK_SUBTLV_DEF_SIZE);
      attr.extended.rsv_bw = ntohf(valf);
      SET_FLAG(attr.flags, LS_ATTR_RSV_BW);
      break;
    case TE_LINK_SUBTLV_AVA_BW:
      memcpy(&valf, value, TE_LINK_SUBTLV_DEF_SIZE);
      attr.extended.ava_bw = ntohf(valf);
      SET_FLAG(attr.flags, LS_ATTR_AVA_BW);
      break;
    case TE_LINK_SUBTLV_USE_BW:
      memcpy(&valf, value, TE_LINK_SUBTLV_DEF_SIZE);
      attr.extended.used_bw = ntohf(valf);
      SET_FLAG(attr.flags, LS_ATTR_USE_BW);
      break;
    default:
      break;
    }
    sum += TLV_SIZE(tlvh);
  }

  /* Get corresponding Edge from Link State Data Base */
  edge = get_edge(ted, attr.adv, attr.standard.local);
  old = edge->attributes;

  ote_debug("  |- Process Traffic Engineering LSA %pI4 for Edge %pI4",
      &lsa->data->id, &attr.standard.local);

  /* Update standard fields */
  len = sizeof(struct ls_standard);
  if ((attr.flags & 0x0FFFF) == (old->flags & 0x0FFFF)) {
    if (memcmp(&attr.standard, &old->standard, len) != 0) {
      memcpy(&old->standard, &attr.standard, len);
      if (edge->status != NEW)
        edge->status = UPDATE;
    }
  } else {
    memcpy(&old->standard, &attr.standard, len);
    old->flags |= attr.flags & 0x0FFFF;
    if (edge->status != NEW)
      edge->status = UPDATE;
  }
  /* Update extended fields */
  len = sizeof(struct ls_extended);
  if ((attr.flags & 0x0FF0000) == (old->flags & 0x0FF0000)) {
    if (memcmp(&attr.extended, &old->extended, len) != 0) {
      memcpy(&old->extended, &attr.extended, len);
      if (edge->status != NEW)
        edge->status = UPDATE;
    }
  } else {
    memcpy(&old->extended, &attr.extended, len);
    old->flags |= attr.flags & 0x0FF0000;
    if (edge->status != NEW)
      edge->status = UPDATE;
  }

  /* If LSA is an Opaque Inter-AS, Add Node and Subnet */
  lsa_id = GET_OPAQUE_TYPE(ntohl(lsa->data->id.s_addr));
  if (lsa_id ==  OPAQUE_TYPE_INTER_AS_LSA)
    ospf_te_update_remote_asbr(ted, edge);

  /* Update remote Link if remote IP addr is known */
  if (CHECK_FLAG(old->flags, LS_ATTR_NEIGH_ADDR)) {
    struct ls_edge *dst;

    dst = ls_find_edge_by_destination(ted, old);
    /* Attach remote link if not set */
    if (dst && edge->source && dst->destination == NULL) {
      vertex = edge->source;
      if (vertex->incoming_edges)
        listnode_add_sort_nodup(vertex->incoming_edges,
              dst);
      dst->destination = vertex;
    }
    /* and destination vertex to this edge */
    if (dst && dst->source && edge->destination == NULL) {
      vertex = dst->source;
      if (vertex->incoming_edges)
        listnode_add_sort_nodup(vertex->incoming_edges,
              edge);
      edge->destination = vertex;
    }
  }

  /* Export Link State Edge if needed */
  if (edge->status == NEW || edge->status == UPDATE) {
    ote_debug("  |- %s TE info. for Edge %pI4",
        edge->status == NEW ? "Add" : "Update",
        &edge->attributes->standard.local);

    ospf_te_export(LS_MSG_TYPE_ATTRIBUTES, edge);
    edge->status = SYNC;
  }

  return 0;
}

/**
 * Delete Link State Attributes information that correspond to the Opaque
 * Traffic Engineering LSA (Type 1) TLVs. Note that the Edge is not removed.
 *
 * @param ted Link State Traffic Engineering Database
 * @param lsa OSPF Link State Advertisement
 *
 * @return  0 if success, -1 otherwise
 */
static int ospf_te_delete_te(struct ls_ted *ted, struct ospf_lsa *lsa)
{
  struct ls_edge *edge;
  struct ls_attributes *attr;
  struct tlv_header *tlvh;
  struct in_addr addr;
  struct ls_edge_key key = {.family = AF_UNSPEC};
  uint16_t len, sum;
  uint8_t lsa_id;

  /* Initialize TLV browsing */
  tlvh = TLV_HDR_TOP(lsa->data);
  /* Skip Router TE ID if present */
  if (ntohs(tlvh->type) == TE_TLV_ROUTER_ADDR)
    tlvh = TLV_HDR_NEXT(tlvh);
  len = TLV_BODY_SIZE(tlvh);
  sum = sizeof(struct tlv_header);

  /* Browse sub-TLV to find Link ID */
  for (tlvh = TLV_DATA(tlvh); sum < len; tlvh = TLV_HDR_NEXT(tlvh)) {
    if (ntohs(tlvh->type) == TE_LINK_SUBTLV_LCLIF_IPADDR) {
      memcpy(&addr, TLV_DATA(tlvh), TE_LINK_SUBTLV_DEF_SIZE);
      key.family = AF_INET;
      IPV4_ADDR_COPY(&key.k.addr, &addr);
      break;
    }
    sum += TLV_SIZE(tlvh);
  }
  if (key.family == AF_UNSPEC)
    return 0;

  /* Search Edge that corresponds to the Link ID */
  edge = ls_find_edge_by_key(ted, key);
  if (!edge || !edge->attributes)
    return 0;
  attr = edge->attributes;

  /* First, remove Remote ASBR and associated Edge & Subnet if any */
  lsa_id = GET_OPAQUE_TYPE(ntohl(lsa->data->id.s_addr));
  if (lsa_id ==  OPAQUE_TYPE_INTER_AS_LSA) {
    ote_debug("  |- Delete remote ASBR, Edge and Subnet");

    if (edge->destination) {
      edge->destination->status = DELETE;
      ospf_te_export(LS_MSG_TYPE_NODE, edge->destination);
      ls_vertex_del_all(ted, edge->destination);
    }

    ospf_te_delete_subnet(ted, attr->standard.local);

    edge->status = DELETE;
    ospf_te_export(LS_MSG_TYPE_ATTRIBUTES, edge);
    ls_edge_del_all(ted, edge);

    return 0;
  }

  ote_debug("  |- Delete TE info. for Edge %pI4",
      &edge->attributes->standard.local);

  /* Remove Link State Attributes TE information */
  memset(&attr->standard, 0, sizeof(struct ls_standard));
  attr->flags &= 0x0FFFF;
  memset(&attr->extended, 0, sizeof(struct ls_extended));
  attr->flags &= 0x0FF0000;
  ls_attributes_srlg_del(attr);

  /* Export Edge that has been updated */
  if (CHECK_FLAG(attr->flags, LS_ATTR_ADJ_SID)
      || CHECK_FLAG(attr->flags, LS_ATTR_BCK_ADJ_SID)) {
    edge->status = UPDATE;
    ospf_te_export(LS_MSG_TYPE_ATTRIBUTES, edge);
    edge->status = SYNC;
  } else {
    /* Remove completely the Edge if Segment Routing is not set */
    ospf_te_delete_subnet(ted, attr->standard.local);
    edge->status = DELETE;
    ospf_te_export(LS_MSG_TYPE_ATTRIBUTES, edge);
    ls_edge_del_all(ted, edge);
  }

  return 0;
}

/**
 * Parse Opaque Router Information LSA (Type 4) TLVs and update the
 * corresponding Link State Vertex with these information (Segment Routing).
 *
 * @param ted Link State Traffic Engineering Database
 * @param lsa OSPF Link State Advertisement
 *
 * @return  0 if success, -1 otherwise
 */
static int ospf_te_parse_ri(struct ls_ted *ted, struct ospf_lsa *lsa)
{
  struct ls_vertex *vertex;
  struct ls_node *node;
  struct lsa_header *lsah = lsa->data;
  struct tlv_header *tlvh;
  uint16_t len = 0, sum = 0;

  /* Get vertex / Node from LSA Advertised Router ID */
  vertex = get_vertex(ted, lsa);
  node = vertex->node;

  ote_debug("  |- Process Router Information LSA %pI4 for Vertex %pI4",
      &lsa->data->id, &node->router_id);

  /* Initialize TLV browsing */
  len = lsa->size - OSPF_LSA_HEADER_SIZE;
  for (tlvh = TLV_HDR_TOP(lsah); sum < len && tlvh;
       tlvh = TLV_HDR_NEXT(tlvh)) {
    struct ri_sr_tlv_sr_algorithm *algo;
    struct ri_sr_tlv_sid_label_range *range;
    struct ri_sr_tlv_node_msd *msd;
    uint32_t size, lower;

    switch (ntohs(tlvh->type)) {
    case RI_SR_TLV_SR_ALGORITHM:
      algo = (struct ri_sr_tlv_sr_algorithm *)tlvh;

      for (int i = 0; i < ntohs(algo->header.length); i++) {
        if (CHECK_FLAG(node->flags, LS_NODE_SR)
            && (node->algo[i] == algo->value[i]))
          continue;

        node->algo[i] = algo->value[i];
        SET_FLAG(node->flags, LS_NODE_SR);
        if (vertex->status != NEW)
          vertex->status = UPDATE;
      }

      /* Reset other Algorithms */
      for (int i = ntohs(algo->header.length); i < 2; i++) {
        if (vertex->status != NEW
            && node->algo[i] != SR_ALGORITHM_UNSET)
          vertex->status = UPDATE;
        node->algo[i] = SR_ALGORITHM_UNSET;
      }

      break;

    case RI_SR_TLV_SRGB_LABEL_RANGE:
      range = (struct ri_sr_tlv_sid_label_range *)tlvh;
      size = GET_RANGE_SIZE(ntohl(range->size));
      lower = GET_LABEL(ntohl(range->lower.value));
      if ((CHECK_FLAG(node->flags, LS_NODE_SR))
          && ((node->srgb.range_size == size)
        && (node->srgb.lower_bound == lower)))
        break;

      node->srgb.range_size = size;
      node->srgb.lower_bound = lower;
      SET_FLAG(node->flags, LS_NODE_SR);
      if (vertex->status != NEW)
        vertex->status = UPDATE;

      break;

    case RI_SR_TLV_SRLB_LABEL_RANGE:
      range = (struct ri_sr_tlv_sid_label_range *)tlvh;
      size = GET_RANGE_SIZE(ntohl(range->size));
      lower = GET_LABEL(ntohl(range->lower.value));
      if ((CHECK_FLAG(node->flags, LS_NODE_SRLB))
          && ((node->srlb.range_size == size)
        && (node->srlb.lower_bound == lower)))
        break;

      node->srlb.range_size = size;
      node->srlb.lower_bound = lower;
      SET_FLAG(node->flags, LS_NODE_SRLB);
      if (vertex->status != NEW)
        vertex->status = UPDATE;

      break;

    case RI_SR_TLV_NODE_MSD:
      msd = (struct ri_sr_tlv_node_msd *)tlvh;
      if ((CHECK_FLAG(node->flags, LS_NODE_MSD))
          && (node->msd == msd->value))
        break;

      node->msd = msd->value;
      SET_FLAG(node->flags, LS_NODE_MSD);
      if (vertex->status != NEW)
        vertex->status = UPDATE;

      break;

    default:
      break;
    }
    sum += TLV_SIZE(tlvh);
  }

  /* Vertex has been created or updated: export it */
  if (vertex->status == NEW || vertex->status == UPDATE) {
    ote_debug("  |- %s SR info - SRGB[%d/%d] for Vertex %pI4",
        vertex->status == NEW ? "Add" : "Update",
        vertex->node->srgb.lower_bound,
        vertex->node->srgb.range_size,
        &vertex->node->router_id);

    ospf_te_export(LS_MSG_TYPE_NODE, vertex);
    vertex->status = SYNC;
  }

  return 0;
}

/**
 * Delete Link State Node information (Segment Routing) that correspond to the
 * Opaque Router Information LSA (Type 4) TLVs. Note that the Vertex is not
 * removed.
 *
 * @param ted Link State Traffic Engineering Database
 * @param lsa OSPF Link State Advertisement
 *
 * @return  0 if success, -1 otherwise
 */
static int ospf_te_delete_ri(struct ls_ted *ted, struct ospf_lsa *lsa)
{
  struct ls_node_id lnid;
  struct ls_vertex *vertex;
  struct ls_node *node;

  /* Search if a Link State Vertex already exist */
  lnid.origin = OSPFv2;
  lnid.id.ip.addr = lsa->data->adv_router;
  lnid.id.ip.area_id = lsa->area->area_id;
  vertex = ls_find_vertex_by_id(ted, lnid);
  if (!vertex)
    return -1;

  /* Remove Segment Routing Information if any */
  node = vertex->node;
  UNSET_FLAG(node->flags, LS_NODE_SR);
  memset(&node->srgb, 0, sizeof(struct ls_srgb));
  node->algo[0] = SR_ALGORITHM_UNSET;
  node->algo[1] = SR_ALGORITHM_UNSET;
  UNSET_FLAG(node->flags, LS_NODE_SRLB);
  memset(&node->srlb, 0, sizeof(struct ls_srlb));
  UNSET_FLAG(node->flags, LS_NODE_MSD);
  node->msd = 0;
  vertex->status = UPDATE;

  ote_debug("  |- Delete SR info. for Vertex %pI4",
      &vertex->node->router_id);

  /* Vertex has been updated: export it */
  ospf_te_export(LS_MSG_TYPE_NODE, vertex);
  vertex->status = SYNC;

  return 0;
}

/**
 * Parse Opaque Extended Prefix LSA (Type 7) TLVs and update the corresponding
 * Link State Subnet with these information (Segment Routing ID).
 *
 * @param ted Link State Traffic Engineering Database
 * @param lsa OSPF Link State Advertisement
 *
 * @return  0 if success, -1 otherwise
 */
static int ospf_te_parse_ext_pref(struct ls_ted *ted, struct ospf_lsa *lsa)
{
  struct ls_node_id lnid;
  struct ls_subnet *subnet;
  struct ls_prefix *ls_pref;
  struct prefix pref;
  struct ext_tlv_prefix *ext;
  struct ext_subtlv_prefix_sid *pref_sid;
  uint32_t label;

  /* Get corresponding Subnet from Link State Data Base */
  ext = (struct ext_tlv_prefix *)TLV_HDR_TOP(lsa->data);
  pref.family = AF_INET;
  pref.prefixlen = ext->pref_length;
  pref.u.prefix4 = ext->address;
  subnet = ls_find_subnet(ted, &pref);

  /* Create new Link State Prefix if not found */
  if (!subnet) {
    lnid.origin = OSPFv2;
    lnid.id.ip.addr = lsa->data->adv_router;
    lnid.id.ip.area_id = lsa->area->area_id;
    ls_pref = ls_prefix_new(lnid, &pref);
    /* and add it to the TED */
    subnet = ls_subnet_add(ted, ls_pref);
  }

  ote_debug("  |- Process Extended Prefix LSA %pI4 for subnet %pFX",
      &lsa->data->id, &pref);

  /* Initialize TLV browsing */
  ls_pref = subnet->ls_pref;
  pref_sid = (struct ext_subtlv_prefix_sid *)((char *)(ext) + TLV_HDR_SIZE
                + EXT_TLV_PREFIX_SIZE);
  label = CHECK_FLAG(pref_sid->flags, EXT_SUBTLV_PREFIX_SID_VFLG)
      ? GET_LABEL(ntohl(pref_sid->value))
      : ntohl(pref_sid->value);

  /* Check if it is a simple refresh */
  if (CHECK_FLAG(ls_pref->flags, LS_PREF_SR)
      && ls_pref->sr.algo == pref_sid->algorithm
      && ls_pref->sr.sid_flag == pref_sid->flags
      && ls_pref->sr.sid == label)
    return 0;

  /* Fulfill SR information */
  ls_pref->sr.algo = pref_sid->algorithm;
  ls_pref->sr.sid_flag = pref_sid->flags;
  ls_pref->sr.sid = label;
  SET_FLAG(ls_pref->flags, LS_PREF_SR);
  if (subnet->status != NEW)
    subnet->status = UPDATE;

  /* Export Subnet if needed */
  if (subnet->status == NEW || subnet->status == UPDATE) {
    ote_debug("  |- %s SID %d to subnet %pFX",
        subnet->status == NEW ? "Add" : "Update",
        ls_pref->sr.sid, &ls_pref->pref);

    ospf_te_export(LS_MSG_TYPE_PREFIX, subnet);
    subnet->status = SYNC;
  }

  return 0;
}

/**
 * Delete Link State Subnet information (Segment Routing ID) that correspond to
 * the Opaque Extended Prefix LSA (Type 7) TLVs. Note that the Subnet is not
 * removed.
 *
 * @param ted Link State Traffic Engineering Database
 * @param lsa OSPF Link State Advertisement
 *
 * @return  0 if success, -1 otherwise
 */
static int ospf_te_delete_ext_pref(struct ls_ted *ted, struct ospf_lsa *lsa)
{
  struct ls_subnet *subnet;
  struct ls_prefix *ls_pref;
  struct prefix pref;
  struct ext_tlv_prefix *ext;

  /* Get corresponding Subnet from Link State Data Base */
  ext = (struct ext_tlv_prefix *)TLV_HDR_TOP(lsa->data);
  pref.family = AF_INET;
  pref.prefixlen = ext->pref_length;
  pref.u.prefix4 = ext->address;
  subnet = ls_find_subnet(ted, &pref);

  /* Check if there is a corresponding subnet */
  if (!subnet)
    return -1;

  ote_debug("  |- Delete SID %d to subnet %pFX", subnet->ls_pref->sr.sid,
      &subnet->ls_pref->pref);

  /* Remove Segment Routing information */
  ls_pref = subnet->ls_pref;
  UNSET_FLAG(ls_pref->flags, LS_PREF_SR);
  memset(&ls_pref->sr, 0, sizeof(struct ls_sid));
  subnet->status = UPDATE;

  /* Subnet has been updated: export it */
  ospf_te_export(LS_MSG_TYPE_PREFIX, subnet);
  subnet->status = SYNC;

  return 0;
}

/**
 * Parse Opaque Extended Link LSA (Type 8) TLVs and update the corresponding
 * Link State Edge with these information (Segment Routing Adjacency).
 *
 * @param ted Link State Traffic Engineering Database
 * @param lsa OSPF Link State Advertisement
 *
 * @return  0 if success, -1 otherwise
 */
static int ospf_te_parse_ext_link(struct ls_ted *ted, struct ospf_lsa *lsa)
{
  struct ls_node_id lnid;
  struct tlv_header *tlvh;
  struct ext_tlv_link *ext;
  struct ls_edge *edge;
  struct ls_attributes *atr;
  uint16_t len = 0, sum = 0, i;
  uint32_t label;

  /* Get corresponding Edge from Link State Data Base */
  lnid.origin = OSPFv2;
  lnid.id.ip.addr = lsa->data->adv_router;
  lnid.id.ip.area_id = lsa->area->area_id;
  ext = (struct ext_tlv_link *)TLV_HDR_TOP(lsa->data);
  edge = get_edge(ted, lnid, ext->link_data);
  atr = edge->attributes;

  ote_debug("  |- Process Extended Link LSA %pI4 for edge %pI4",
      &lsa->data->id, &edge->attributes->standard.local);

  /* Initialize TLV browsing */
  len = TLV_BODY_SIZE(&ext->header) - EXT_TLV_LINK_SIZE;
  tlvh = (struct tlv_header *)((char *)(ext) + TLV_HDR_SIZE
             + EXT_TLV_LINK_SIZE);
  for (; sum < len; tlvh = TLV_HDR_NEXT(tlvh)) {
    struct ext_subtlv_adj_sid *adj;
    struct ext_subtlv_lan_adj_sid *ladj;
    struct ext_subtlv_rmt_itf_addr *rmt;

    switch (ntohs(tlvh->type)) {
    case EXT_SUBTLV_ADJ_SID:
      adj = (struct ext_subtlv_adj_sid *)tlvh;
      label = CHECK_FLAG(adj->flags,
             EXT_SUBTLV_LINK_ADJ_SID_VFLG)
          ? GET_LABEL(ntohl(adj->value))
          : ntohl(adj->value);
      i = CHECK_FLAG(adj->flags,
               EXT_SUBTLV_LINK_ADJ_SID_BFLG) ? 1 : 0;
      if (((i && CHECK_FLAG(atr->flags, LS_ATTR_BCK_ADJ_SID))
           || (!i && CHECK_FLAG(atr->flags, LS_ATTR_ADJ_SID)))
          && atr->adj_sid[i].flags == adj->flags
          && atr->adj_sid[i].sid == label
          && atr->adj_sid[i].weight == adj->weight)
        break;

      atr->adj_sid[i].flags = adj->flags;
      atr->adj_sid[i].sid = label;
      atr->adj_sid[i].weight = adj->weight;
      if (i == 0)
        SET_FLAG(atr->flags, LS_ATTR_ADJ_SID);
      else
        SET_FLAG(atr->flags, LS_ATTR_BCK_ADJ_SID);
      if (edge->status != NEW)
        edge->status = UPDATE;

      break;
    case EXT_SUBTLV_LAN_ADJ_SID:
      ladj = (struct ext_subtlv_lan_adj_sid *)tlvh;
      label = CHECK_FLAG(ladj->flags,
             EXT_SUBTLV_LINK_ADJ_SID_VFLG)
          ? GET_LABEL(ntohl(ladj->value))
          : ntohl(ladj->value);
      i = CHECK_FLAG(ladj->flags,
               EXT_SUBTLV_LINK_ADJ_SID_BFLG) ? 1 : 0;
      if (((i && CHECK_FLAG(atr->flags, LS_ATTR_BCK_ADJ_SID))
           || (!i && CHECK_FLAG(atr->flags, LS_ATTR_ADJ_SID)))
          && atr->adj_sid[i].flags == ladj->flags
          && atr->adj_sid[i].sid == label
          && atr->adj_sid[i].weight == ladj->weight
          && IPV4_ADDR_SAME(&atr->adj_sid[1].neighbor.addr,
                &ladj->neighbor_id))
        break;

      atr->adj_sid[i].flags = ladj->flags;
      atr->adj_sid[i].sid = label;
      atr->adj_sid[i].weight = ladj->weight;
      atr->adj_sid[i].neighbor.addr = ladj->neighbor_id;
      if (i == 0)
        SET_FLAG(atr->flags, LS_ATTR_ADJ_SID);
      else
        SET_FLAG(atr->flags, LS_ATTR_BCK_ADJ_SID);
      if (edge->status != NEW)
        edge->status = UPDATE;

      break;
    case EXT_SUBTLV_RMT_ITF_ADDR:
      rmt = (struct ext_subtlv_rmt_itf_addr *)tlvh;
      if (CHECK_FLAG(atr->flags, LS_ATTR_NEIGH_ADDR)
          && IPV4_ADDR_SAME(&atr->standard.remote,
                &rmt->value))
        break;

      atr->standard.remote = rmt->value;
      SET_FLAG(atr->flags, LS_ATTR_NEIGH_ADDR);
      if (edge->status != NEW)
        edge->status = UPDATE;

      break;
    default:
      break;
    }
    sum += TLV_SIZE(tlvh);
  }

  /* Export Link State Edge if needed */
  if (edge->status == NEW || edge->status == UPDATE) {
    ote_debug("  |- %s Adj-SID %d & %d to edge %pI4",
        edge->status == NEW ? "Add" : "Update",
        edge->attributes->adj_sid[0].sid,
        edge->attributes->adj_sid[1].sid,
        &edge->attributes->standard.local);

    ospf_te_export(LS_MSG_TYPE_ATTRIBUTES, edge);
    edge->status = SYNC;
  }

  return 0;
}

/**
 * Delete Link State Edge information (Segment Routing Adjacency) that
 * correspond to the Opaque Extended Link LSA (Type 8) TLVs. Note that the Edge
 * is not removed.
 *
 * @param ted Link State Traffic Engineering Database
 * @param lsa OSPF Link State Advertisement
 *
 * @return  0 if success, -1 otherwise
 */
static int ospf_te_delete_ext_link(struct ls_ted *ted, struct ospf_lsa *lsa)
{
  struct ls_edge *edge;
  struct ls_attributes *atr;
  struct ext_tlv_link *ext;
  struct ls_edge_key key;

  /* Search for corresponding Edge from Link State Data Base */
  ext = (struct ext_tlv_link *)TLV_HDR_TOP(lsa->data);
  key.family = AF_INET;
  IPV4_ADDR_COPY(&key.k.addr, &ext->link_data);
  edge = ls_find_edge_by_key(ted, key);

  /* Check if there is a corresponding Edge */
  if (!edge)
    return -1;

  ote_debug("  |- Delete Adj-SID %d to edge %pI4",
      edge->attributes->adj_sid[0].sid,
      &edge->attributes->standard.local);

  /* Remove Segment Routing information */
  atr = edge->attributes;
  UNSET_FLAG(atr->flags, LS_ATTR_ADJ_SID);
  UNSET_FLAG(atr->flags, LS_ATTR_BCK_ADJ_SID);
  memset(atr->adj_sid, 0, 2 * sizeof(struct ls_sid));
  edge->status = UPDATE;

  /* Edge has been updated: export it */
  ospf_te_export(LS_MSG_TYPE_ATTRIBUTES, edge);
  edge->status = SYNC;

  return 0;
}

/**
 * Parse Opaque LSA Type and call corresponding parser.
 *
 * @param ted Link State Traffic Engineering Database
 * @param lsa OSPF Link State Advertisement
 *
 * @return  0 if success, -1 otherwise
 */
static int ospf_te_parse_opaque_lsa(struct ls_ted *ted, struct ospf_lsa *lsa)
{
  uint8_t key = GET_OPAQUE_TYPE(ntohl(lsa->data->id.s_addr));
  int rc = -1;

  ote_debug("MPLS-TE (%s): Parse Opaque LSA[%pI4] from Router[%pI4]",
      __func__, &lsa->data->id, &lsa->data->adv_router);

  switch (key) {
  case OPAQUE_TYPE_TRAFFIC_ENGINEERING_LSA:
  case OPAQUE_TYPE_INTER_AS_LSA:
    rc = ospf_te_parse_te(ted, lsa);
    break;
  case OPAQUE_TYPE_ROUTER_INFORMATION_LSA:
    rc = ospf_te_parse_ri(ted, lsa);
    break;
  case OPAQUE_TYPE_EXTENDED_PREFIX_LSA:
    rc = ospf_te_parse_ext_pref(ted, lsa);
    break;
  case OPAQUE_TYPE_EXTENDED_LINK_LSA:
    rc = ospf_te_parse_ext_link(ted, lsa);
    break;
  default:
    break;
  }

  return rc;
}

/**
 * Parse Opaque LSA Type and call corresponding deletion function.
 *
 * @param ted Link State Traffic Engineering Database
 * @param lsa OSPF Link State Advertisement
 *
 * @return  0 if success, -1 otherwise
 */
static int ospf_te_delete_opaque_lsa(struct ls_ted *ted, struct ospf_lsa *lsa)
{
  uint8_t key = GET_OPAQUE_TYPE(ntohl(lsa->data->id.s_addr));
  int rc = -1;

  ote_debug("MPLS-TE (%s): Parse Opaque LSA[%pI4] from Router[%pI4]",
      __func__, &lsa->data->id, &lsa->data->adv_router);

  switch (key) {
  case OPAQUE_TYPE_TRAFFIC_ENGINEERING_LSA:
  case OPAQUE_TYPE_INTER_AS_LSA:
    rc = ospf_te_delete_te(ted, lsa);
    break;
  case OPAQUE_TYPE_ROUTER_INFORMATION_LSA:
    rc = ospf_te_delete_ri(ted, lsa);
    break;
  case OPAQUE_TYPE_EXTENDED_PREFIX_LSA:
    rc = ospf_te_delete_ext_pref(ted, lsa);
    break;
  case OPAQUE_TYPE_EXTENDED_LINK_LSA:
    rc = ospf_te_delete_ext_link(ted, lsa);
    break;
  default:
    break;
  }

  return rc;
}

/**
 * Update Traffic Engineering Database Elements that correspond to the received
 * OSPF LSA. If LSA age is equal to MAX_AGE, call deletion function instead.
 *
 * @param lsa OSPF Link State Advertisement
 *
 * @return  0 if success, -1 otherwise
 */
static int ospf_mpls_te_lsa_update(struct ospf_lsa *lsa)
{

  uint8_t rc;

  /* Check that MPLS-TE is active */
  if (!OspfMplsTE.enabled || !OspfMplsTE.ted)
    return 0;

  /* Sanity Check */
  if (lsa == NULL) {
    flog_warn(EC_OSPF_LSA_NULL, "TE (%s): Abort! LSA is NULL",
        __func__);
    return -1;
  }

  /* If LSA is MAX_AGE, remove corresponding Link State element */
  if (IS_LSA_MAXAGE(lsa)) {
    switch (lsa->data->type) {
    case OSPF_ROUTER_LSA:
      rc = ospf_te_delete_router_lsa(OspfMplsTE.ted, lsa);
      break;
    case OSPF_OPAQUE_AREA_LSA:
    case OSPF_OPAQUE_AS_LSA:
      rc = ospf_te_delete_opaque_lsa(OspfMplsTE.ted, lsa);
      break;
    default:
      rc = 0;
      break;
    }
  } else {
    /* Parse LSA to Update corresponding Link State element */
    switch (lsa->data->type) {
    case OSPF_ROUTER_LSA:
      rc = ospf_te_parse_router_lsa(OspfMplsTE.ted, lsa);
      break;
    case OSPF_OPAQUE_AREA_LSA:
    case OSPF_OPAQUE_AS_LSA:
      rc = ospf_te_parse_opaque_lsa(OspfMplsTE.ted, lsa);
      break;
    default:
      rc = 0;
      break;
    }
  }

  return rc;
}

/**
 * Delete Traffic Engineering Database element from OSPF LSA. This function
 * process only self LSA (i.e. advertised by the router) which reach MAX_AGE
 * as LSA deleted by neighbor routers are Flushed (i.e. advertised with
 * age == MAX_AGE) and processed by ospf_mpls_te_lsa_update() function.
 *
 * @param lsa OSPF Link State Advertisement
 *
 * @return  0 if success, -1 otherwise
 */
static int ospf_mpls_te_lsa_delete(struct ospf_lsa *lsa)
{

  uint8_t rc;

  /* Check that MPLS-TE is active */
  if (!OspfMplsTE.enabled || !OspfMplsTE.ted)
    return 0;

  /* Sanity Check */
  if (lsa == NULL) {
    flog_warn(EC_OSPF_LSA_NULL, "TE (%s): Abort! LSA is NULL",
        __func__);
    return -1;
  }

  /*
   * Process only self LSAs that reach MAX_AGE. Indeed, when the router
   * need to update or refresh an LSA, it first removes the old LSA from
   * the LSDB and then insert the new one. Thus, to avoid removing
   * corresponding Link State element and loosing some parameters
   * instead of just updating it, only self LSAs that reach MAX_AGE are
   * processed here. Other LSAs are processed by ospf_mpls_te_lsa_update()
   * and eventually removed when LSA age is MAX_AGE i.e. LSA is flushed
   * by the originator.
   */
  if (!IS_LSA_SELF(lsa) || !IS_LSA_MAXAGE(lsa))
    return 0;

  /* Parse Link State information */
  switch (lsa->data->type) {
  case OSPF_ROUTER_LSA:
    rc = ospf_te_delete_router_lsa(OspfMplsTE.ted, lsa);
    break;
  case OSPF_OPAQUE_AREA_LSA:
  case OSPF_OPAQUE_AS_LSA:
    rc = ospf_te_delete_opaque_lsa(OspfMplsTE.ted, lsa);
    break;
  default:
    rc = 0;
    break;
  }

  return rc;
}

/**
 * Send the whole Link State Traffic Engineering Database to the consumer that
 * request it through a ZAPI Link State Synchronous Opaque Message.
 *
 * @param info  ZAPI Opaque message
 *
 * @return  0 if success, -1 otherwise
 */
int ospf_te_sync_ted(struct zapi_opaque_reg_info dst)
{
  int rc = -1;

  /* Check that MPLS-TE and TE distribution are enabled */
  if (!OspfMplsTE.enabled || !OspfMplsTE.export)
    return rc;

  rc = ls_sync_ted(OspfMplsTE.ted, zclient, &dst);

  return rc;
}

/**
 * Initialize Traffic Engineering Database from the various OSPF Link State
 * Database (LSDB).
 *
 * @param ted Link State Traffice Engineering Database
 * @param ospf  OSPF main structure
 */
static void ospf_te_init_ted(struct ls_ted *ted, struct ospf *ospf)
{
  struct listnode *node, *nnode;
  struct route_node *rn;
  struct ospf_area *area;
  struct ospf_lsa *lsa;

  /* Iterate over all areas. */
  for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) {
    if (!area->lsdb)
      continue;

    /* Parse all Router LSAs from the area LSDB */
    LSDB_LOOP (ROUTER_LSDB(area), rn, lsa)
      ospf_te_parse_router_lsa(ted, lsa);

    /* Parse all Opaque LSAs from the area LSDB */
    LSDB_LOOP (OPAQUE_AREA_LSDB(area), rn, lsa)
      ospf_te_parse_opaque_lsa(ted, lsa);
  }

  /* Parse AS-external opaque LSAs from OSPF LSDB */
  if (ospf->lsdb) {
    LSDB_LOOP (OPAQUE_AS_LSDB(ospf), rn, lsa)
      ospf_te_parse_opaque_lsa(ted, lsa);
  }

}

/*------------------------------------------------------------------------*
 * Following are vty session control functions.
 *------------------------------------------------------------------------*/
#define check_tlv_size(size, msg)                                              \
  do {                                                                   \
    if (ntohs(tlvh->length) > size) {                              \
      if (vty != NULL)                                       \
        vty_out(vty, "  Wrong %s TLV size: %d(%d)\n",  \
          msg, ntohs(tlvh->length), size);       \
      else                                                   \
        zlog_debug("    Wrong %s TLV size: %d(%d)",    \
             msg, ntohs(tlvh->length), size);    \
      return size + TLV_HDR_SIZE;                            \
    }                                                              \
  } while (0)

static uint16_t show_vty_router_addr(struct vty *vty, struct tlv_header *tlvh)
{
  struct te_tlv_router_addr *top = (struct te_tlv_router_addr *)tlvh;

  check_tlv_size(TE_LINK_SUBTLV_DEF_SIZE, "Router Address");

  if (vty != NULL)
    vty_out(vty, "  Router-Address: %pI4\n", &top->value);
  else
    zlog_debug("    Router-Address: %pI4", &top->value);

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_header(struct vty *vty, struct tlv_header *tlvh,
             size_t buf_size)
{
  struct te_tlv_link *top = (struct te_tlv_link *)tlvh;

  if (TLV_SIZE(tlvh) > buf_size) {
    if (vty != NULL)
      vty_out(vty,
        "    TLV size %d exceeds buffer size. Abort!",
        TLV_SIZE(tlvh));
    else
      zlog_debug(
        "    TLV size %d exceeds buffer size. Abort!",
        TLV_SIZE(tlvh));
    return buf_size;
  }

  if (vty != NULL)
    vty_out(vty, "  Link: %u octets of data\n",
      ntohs(top->header.length));
  else
    zlog_debug("    Link: %u octets of data",
         ntohs(top->header.length));

  return TLV_HDR_SIZE; /* Here is special, not "TLV_SIZE". */
}

static uint16_t show_vty_link_subtlv_link_type(struct vty *vty,
                 struct tlv_header *tlvh)
{
  struct te_link_subtlv_link_type *top;
  const char *cp = "Unknown";

  check_tlv_size(TE_LINK_SUBTLV_TYPE_SIZE, "Link Type");

  top = (struct te_link_subtlv_link_type *)tlvh;
  switch (top->link_type.value) {
  case LINK_TYPE_SUBTLV_VALUE_PTP:
    cp = "Point-to-point";
    break;
  case LINK_TYPE_SUBTLV_VALUE_MA:
    cp = "Multiaccess";
    break;
  default:
    break;
  }

  if (vty != NULL)
    vty_out(vty, "  Link-Type: %s (%u)\n", cp,
      top->link_type.value);
  else
    zlog_debug("    Link-Type: %s (%u)", cp, top->link_type.value);

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_link_id(struct vty *vty,
               struct tlv_header *tlvh)
{
  struct te_link_subtlv_link_id *top;

  check_tlv_size(TE_LINK_SUBTLV_DEF_SIZE, "Link ID");

  top = (struct te_link_subtlv_link_id *)tlvh;
  if (vty != NULL)
    vty_out(vty, "  Link-ID: %pI4\n", &top->value);
  else
    zlog_debug("    Link-ID: %pI4", &top->value);

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_lclif_ipaddr(struct vty *vty,
              struct tlv_header *tlvh,
              size_t buf_size)
{
  struct te_link_subtlv_lclif_ipaddr *top;
  int i, n;

  if (TLV_SIZE(tlvh) > buf_size) {
    if (vty != NULL)
      vty_out(vty,
        "    TLV size %d exceeds buffer size. Abort!",
        TLV_SIZE(tlvh));
    else
      zlog_debug(
        "    TLV size %d exceeds buffer size. Abort!",
        TLV_SIZE(tlvh));
    return buf_size;
  }

  top = (struct te_link_subtlv_lclif_ipaddr *)tlvh;
  n = ntohs(tlvh->length) / sizeof(top->value[0]);

  if (vty != NULL)
    vty_out(vty, "  Local Interface IP Address(es): %d\n", n);
  else
    zlog_debug("    Local Interface IP Address(es): %d", n);

  for (i = 0; i < n; i++) {
    if (vty != NULL)
      vty_out(vty, "    #%d: %pI4\n", i, &top->value[i]);
    else
      zlog_debug("      #%d: %pI4", i, &top->value[i]);
  }
  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_rmtif_ipaddr(struct vty *vty,
              struct tlv_header *tlvh,
              size_t buf_size)
{
  struct te_link_subtlv_rmtif_ipaddr *top;
  int i, n;

  if (TLV_SIZE(tlvh) > buf_size) {
    if (vty != NULL)
      vty_out(vty,
        "    TLV size %d exceeds buffer size. Abort!",
        TLV_SIZE(tlvh));
    else
      zlog_debug(
        "    TLV size %d exceeds buffer size. Abort!",
        TLV_SIZE(tlvh));
    return buf_size;
  }

  top = (struct te_link_subtlv_rmtif_ipaddr *)tlvh;
  n = ntohs(tlvh->length) / sizeof(top->value[0]);
  if (vty != NULL)
    vty_out(vty, "  Remote Interface IP Address(es): %d\n", n);
  else
    zlog_debug("    Remote Interface IP Address(es): %d", n);

  for (i = 0; i < n; i++) {
    if (vty != NULL)
      vty_out(vty, "    #%d: %pI4\n", i, &top->value[i]);
    else
      zlog_debug("      #%d: %pI4", i, &top->value[i]);
  }
  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_te_metric(struct vty *vty,
                 struct tlv_header *tlvh)
{
  struct te_link_subtlv_te_metric *top;

  check_tlv_size(TE_LINK_SUBTLV_DEF_SIZE, "TE Metric");

  top = (struct te_link_subtlv_te_metric *)tlvh;
  if (vty != NULL)
    vty_out(vty, "  Traffic Engineering Metric: %u\n",
      (uint32_t)ntohl(top->value));
  else
    zlog_debug("    Traffic Engineering Metric: %u",
         (uint32_t)ntohl(top->value));

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_max_bw(struct vty *vty,
              struct tlv_header *tlvh)
{
  struct te_link_subtlv_max_bw *top;
  float fval;

  check_tlv_size(TE_LINK_SUBTLV_DEF_SIZE, "Maximum Bandwidth");

  top = (struct te_link_subtlv_max_bw *)tlvh;
  fval = ntohf(top->value);

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

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_max_rsv_bw(struct vty *vty,
            struct tlv_header *tlvh)
{
  struct te_link_subtlv_max_rsv_bw *top;
  float fval;

  check_tlv_size(TE_LINK_SUBTLV_DEF_SIZE, "Maximum Reservable Bandwidth");

  top = (struct te_link_subtlv_max_rsv_bw *)tlvh;
  fval = ntohf(top->value);

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

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_unrsv_bw(struct vty *vty,
                struct tlv_header *tlvh)
{
  struct te_link_subtlv_unrsv_bw *top;
  float fval1, fval2;
  int i;

  check_tlv_size(TE_LINK_SUBTLV_UNRSV_SIZE, "Unreserved Bandwidth");

  top = (struct te_link_subtlv_unrsv_bw *)tlvh;
  if (vty != NULL)
    vty_out(vty,
      "  Unreserved Bandwidth per Class Type in Byte/s:\n");
  else
    zlog_debug(
      "    Unreserved Bandwidth per Class Type in Byte/s:");
  for (i = 0; i < MAX_CLASS_TYPE; i += 2) {
    fval1 = ntohf(top->value[i]);
    fval2 = ntohf(top->value[i + 1]);

    if (vty != NULL)
      vty_out(vty,
        "    [%d]: %g (Bytes/sec),\t[%d]: %g (Bytes/sec)\n",
        i, fval1, i + 1, fval2);
    else
      zlog_debug(
        "      [%d]: %g (Bytes/sec),  [%d]: %g (Bytes/sec)",
        i, fval1, i + 1, fval2);
  }

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_rsc_clsclr(struct vty *vty,
            struct tlv_header *tlvh)
{
  struct te_link_subtlv_rsc_clsclr *top;

  check_tlv_size(TE_LINK_SUBTLV_DEF_SIZE, "Resource class/color");

  top = (struct te_link_subtlv_rsc_clsclr *)tlvh;
  if (vty != NULL)
    vty_out(vty, "  Resource class/color: 0x%x\n",
      (uint32_t)ntohl(top->value));
  else
    zlog_debug("    Resource Class/Color: 0x%x",
         (uint32_t)ntohl(top->value));

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_lrrid(struct vty *vty,
             struct tlv_header *tlvh)
{
  struct te_link_subtlv_lrrid *top;

  check_tlv_size(TE_LINK_SUBTLV_LRRID_SIZE, "Local/Remote Router ID");

  top = (struct te_link_subtlv_lrrid *)tlvh;

  if (vty != NULL) {
    vty_out(vty, "  Local  TE Router ID: %pI4\n",
      &top->local);
    vty_out(vty, "  Remote TE Router ID: %pI4\n",
      &top->remote);
  } else {
    zlog_debug("    Local  TE Router ID: %pI4",
         &top->local);
    zlog_debug("    Remote TE Router ID: %pI4",
         &top->remote);
  }

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_llri(struct vty *vty,
            struct tlv_header *tlvh)
{
  struct te_link_subtlv_llri *top;

  check_tlv_size(TE_LINK_SUBTLV_LLRI_SIZE, "Link Local/Remote ID");

  top = (struct te_link_subtlv_llri *)tlvh;

  if (vty != NULL) {
    vty_out(vty, "  Link Local  ID: %d\n",
      (uint32_t)ntohl(top->local));
    vty_out(vty, "  Link Remote ID: %d\n",
      (uint32_t)ntohl(top->remote));
  } else {
    zlog_debug("    Link Local  ID: %d",
         (uint32_t)ntohl(top->local));
    zlog_debug("    Link Remote ID: %d",
         (uint32_t)ntohl(top->remote));
  }

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_rip(struct vty *vty,
           struct tlv_header *tlvh)
{
  struct te_link_subtlv_rip *top;

  check_tlv_size(TE_LINK_SUBTLV_DEF_SIZE, "Remote ASBR Address");

  top = (struct te_link_subtlv_rip *)tlvh;

  if (vty != NULL)
    vty_out(vty, "  Inter-AS TE Remote ASBR IP address: %pI4\n",
      &top->value);
  else
    zlog_debug("    Inter-AS TE Remote ASBR IP address: %pI4",
         &top->value);

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_ras(struct vty *vty,
           struct tlv_header *tlvh)
{
  struct te_link_subtlv_ras *top;

  check_tlv_size(TE_LINK_SUBTLV_DEF_SIZE, "Remote AS number");

  top = (struct te_link_subtlv_ras *)tlvh;

  if (vty != NULL)
    vty_out(vty, "  Inter-AS TE Remote AS number: %u\n",
      ntohl(top->value));
  else
    zlog_debug("    Inter-AS TE Remote AS number: %u",
         ntohl(top->value));

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_av_delay(struct vty *vty,
                struct tlv_header *tlvh)
{
  struct te_link_subtlv_av_delay *top;
  uint32_t delay;
  uint32_t anomalous;

  check_tlv_size(TE_LINK_SUBTLV_DEF_SIZE, "Average Link Delay");

  top = (struct te_link_subtlv_av_delay *)tlvh;
  delay = (uint32_t)ntohl(top->value) & TE_EXT_MASK;
  anomalous = (uint32_t)ntohl(top->value) & TE_EXT_ANORMAL;

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

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_mm_delay(struct vty *vty,
                struct tlv_header *tlvh)
{
  struct te_link_subtlv_mm_delay *top;
  uint32_t low, high;
  uint32_t anomalous;

  check_tlv_size(TE_LINK_SUBTLV_MM_DELAY_SIZE, "Min/Max Link Delay");

  top = (struct te_link_subtlv_mm_delay *)tlvh;
  low = (uint32_t)ntohl(top->low) & TE_EXT_MASK;
  anomalous = (uint32_t)ntohl(top->low) & TE_EXT_ANORMAL;
  high = (uint32_t)ntohl(top->high);

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

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_delay_var(struct vty *vty,
                 struct tlv_header *tlvh)
{
  struct te_link_subtlv_delay_var *top;
  uint32_t jitter;

  check_tlv_size(TE_LINK_SUBTLV_DEF_SIZE, "Link Delay Variation");

  top = (struct te_link_subtlv_delay_var *)tlvh;
  jitter = (uint32_t)ntohl(top->value) & TE_EXT_MASK;

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

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_pkt_loss(struct vty *vty,
                struct tlv_header *tlvh)
{
  struct te_link_subtlv_pkt_loss *top;
  uint32_t loss;
  uint32_t anomalous;
  float fval;

  check_tlv_size(TE_LINK_SUBTLV_DEF_SIZE, "Link Loss");

  top = (struct te_link_subtlv_pkt_loss *)tlvh;
  loss = (uint32_t)ntohl(top->value) & TE_EXT_MASK;
  fval = (float)(loss * LOSS_PRECISION);
  anomalous = (uint32_t)ntohl(top->value) & TE_EXT_ANORMAL;

  if (vty != NULL)
    vty_out(vty, "  %s Link Loss: %g (%%)\n",
      anomalous ? "Anomalous" : "Normal", fval);
  else
    zlog_debug("    %s Link Loss: %g (%%)",
         anomalous ? "Anomalous" : "Normal", fval);

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_res_bw(struct vty *vty,
              struct tlv_header *tlvh)
{
  struct te_link_subtlv_res_bw *top;
  float fval;

  check_tlv_size(TE_LINK_SUBTLV_DEF_SIZE, "Residual Bandwidth");

  top = (struct te_link_subtlv_res_bw *)tlvh;
  fval = ntohf(top->value);

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

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_ava_bw(struct vty *vty,
              struct tlv_header *tlvh)
{
  struct te_link_subtlv_ava_bw *top;
  float fval;

  check_tlv_size(TE_LINK_SUBTLV_DEF_SIZE, "Available Bandwidth");

  top = (struct te_link_subtlv_ava_bw *)tlvh;
  fval = ntohf(top->value);

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

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_link_subtlv_use_bw(struct vty *vty,
              struct tlv_header *tlvh)
{
  struct te_link_subtlv_use_bw *top;
  float fval;

  check_tlv_size(TE_LINK_SUBTLV_DEF_SIZE, "Utilized Bandwidth");

  top = (struct te_link_subtlv_use_bw *)tlvh;
  fval = ntohf(top->value);

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

  return TLV_SIZE(tlvh);
}

static uint16_t show_vty_unknown_tlv(struct vty *vty, struct tlv_header *tlvh,
             size_t buf_size)
{
  if (TLV_SIZE(tlvh) > buf_size) {
    if (vty != NULL)
      vty_out(vty,
        "    TLV size %d exceeds buffer size. Abort!",
        TLV_SIZE(tlvh));
    else
      zlog_debug(
        "    TLV size %d exceeds buffer size. Abort!",
        TLV_SIZE(tlvh));
    return buf_size;
  }

  if (vty != NULL)
    vty_out(vty, "  Unknown TLV: [type(0x%x), length(0x%x)]\n",
      ntohs(tlvh->type), ntohs(tlvh->length));
  else
    zlog_debug("    Unknown TLV: [type(0x%x), length(0x%x)]",
         ntohs(tlvh->type), ntohs(tlvh->length));

  return TLV_SIZE(tlvh);
}

static uint16_t ospf_mpls_te_show_link_subtlv(struct vty *vty,
                struct tlv_header *tlvh0,
                uint16_t subtotal, uint16_t total)
{
  struct tlv_header *tlvh;
  uint16_t sum = subtotal;

  for (tlvh = tlvh0; sum < total; tlvh = TLV_HDR_NEXT(tlvh)) {
    switch (ntohs(tlvh->type)) {
    case TE_LINK_SUBTLV_LINK_TYPE:
      sum += show_vty_link_subtlv_link_type(vty, tlvh);
      break;
    case TE_LINK_SUBTLV_LINK_ID:
      sum += show_vty_link_subtlv_link_id(vty, tlvh);
      break;
    case TE_LINK_SUBTLV_LCLIF_IPADDR:
      sum += show_vty_link_subtlv_lclif_ipaddr(vty, tlvh,
                 total - sum);
      break;
    case TE_LINK_SUBTLV_RMTIF_IPADDR:
      sum += show_vty_link_subtlv_rmtif_ipaddr(vty, tlvh,
                 total - sum);
      break;
    case TE_LINK_SUBTLV_TE_METRIC:
      sum += show_vty_link_subtlv_te_metric(vty, tlvh);
      break;
    case TE_LINK_SUBTLV_MAX_BW:
      sum += show_vty_link_subtlv_max_bw(vty, tlvh);
      break;
    case TE_LINK_SUBTLV_MAX_RSV_BW:
      sum += show_vty_link_subtlv_max_rsv_bw(vty, tlvh);
      break;
    case TE_LINK_SUBTLV_UNRSV_BW:
      sum += show_vty_link_subtlv_unrsv_bw(vty, tlvh);
      break;
    case TE_LINK_SUBTLV_RSC_CLSCLR:
      sum += show_vty_link_subtlv_rsc_clsclr(vty, tlvh);
      break;
    case TE_LINK_SUBTLV_LRRID:
      sum += show_vty_link_subtlv_lrrid(vty, tlvh);
      break;
    case TE_LINK_SUBTLV_LLRI:
      sum += show_vty_link_subtlv_llri(vty, tlvh);
      break;
    case TE_LINK_SUBTLV_RIP:
      sum += show_vty_link_subtlv_rip(vty, tlvh);
      break;
    case TE_LINK_SUBTLV_RAS:
      sum += show_vty_link_subtlv_ras(vty, tlvh);
      break;
    case TE_LINK_SUBTLV_AV_DELAY:
      sum += show_vty_link_subtlv_av_delay(vty, tlvh);
      break;
    case TE_LINK_SUBTLV_MM_DELAY:
      sum += show_vty_link_subtlv_mm_delay(vty, tlvh);
      break;
    case TE_LINK_SUBTLV_DELAY_VAR:
      sum += show_vty_link_subtlv_delay_var(vty, tlvh);
      break;
    case TE_LINK_SUBTLV_PKT_LOSS:
      sum += show_vty_link_subtlv_pkt_loss(vty, tlvh);
      break;
    case TE_LINK_SUBTLV_RES_BW:
      sum += show_vty_link_subtlv_res_bw(vty, tlvh);
      break;
    case TE_LINK_SUBTLV_AVA_BW:
      sum += show_vty_link_subtlv_ava_bw(vty, tlvh);
      break;
    case TE_LINK_SUBTLV_USE_BW:
      sum += show_vty_link_subtlv_use_bw(vty, tlvh);
      break;
    default:
      sum += show_vty_unknown_tlv(vty, tlvh, total - sum);
      break;
    }
  }
  return sum;
}

static void ospf_mpls_te_show_info(struct vty *vty, struct json_object *json,
           struct ospf_lsa *lsa)
{
  struct lsa_header *lsah = lsa->data;
  struct tlv_header *tlvh, *next;
  uint16_t sum, total;
  uint16_t (*subfunc)(struct vty * vty, struct tlv_header * tlvh,
          uint16_t subtotal, uint16_t total) = NULL;

  if (json)
    return;

  sum = 0;
  total = lsa->size - OSPF_LSA_HEADER_SIZE;

  for (tlvh = TLV_HDR_TOP(lsah); sum < total && tlvh;
       tlvh = (next ? next : TLV_HDR_NEXT(tlvh))) {
    if (subfunc != NULL) {
      sum = (*subfunc)(vty, tlvh, sum, total);
      next = (struct tlv_header *)((char *)tlvh + sum);
      subfunc = NULL;
      continue;
    }

    next = NULL;
    switch (ntohs(tlvh->type)) {
    case TE_TLV_ROUTER_ADDR:
      sum += show_vty_router_addr(vty, tlvh);
      break;
    case TE_TLV_LINK:
      sum += show_vty_link_header(vty, tlvh, total - sum);
      subfunc = ospf_mpls_te_show_link_subtlv;
      next = TLV_DATA(tlvh);
      break;
    default:
      sum += show_vty_unknown_tlv(vty, tlvh, total - sum);
      break;
    }
  }
  return;
}

static void ospf_mpls_te_config_write_router(struct vty *vty)
{

  if (OspfMplsTE.enabled) {
    vty_out(vty, " mpls-te on\n");
    vty_out(vty, " mpls-te router-address %pI4\n",
      &OspfMplsTE.router_addr.value);

    if (OspfMplsTE.inter_as == AS)
      vty_out(vty, " mpls-te inter-as as\n");
    if (OspfMplsTE.inter_as == Area)
      vty_out(vty, " mpls-te inter-as area %pI4 \n",
        &OspfMplsTE.interas_areaid);
    if (OspfMplsTE.export)
      vty_out(vty, " mpls-te export\n");
  }
  return;
}

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

DEFUN (ospf_mpls_te_on,
       ospf_mpls_te_on_cmd,
       "mpls-te on",
       MPLS_TE_STR
       "Enable the MPLS-TE functionality\n")
{
  VTY_DECLVAR_INSTANCE_CONTEXT(ospf, ospf);
  struct listnode *node;
  struct mpls_te_link *lp;

  if (OspfMplsTE.enabled)
    return CMD_SUCCESS;

  /* Check that the OSPF is using default VRF */
  if (ospf->vrf_id != VRF_DEFAULT) {
    vty_out(vty, "MPLS TE is only supported in default VRF\n");
    return CMD_WARNING_CONFIG_FAILED;
  }

  ote_debug("MPLS-TE: OFF -> ON");

  OspfMplsTE.enabled = true;

  /* Reoriginate RFC3630 & RFC6827 Links */
  ospf_mpls_te_foreach_area(ospf_mpls_te_lsa_schedule,
          REORIGINATE_THIS_LSA);

  /* Reoriginate LSA if INTER-AS is always on */
  if (OspfMplsTE.inter_as != Off) {
    for (ALL_LIST_ELEMENTS_RO(OspfMplsTE.iflist, node, lp)) {
      if (IS_INTER_AS(lp->type)) {
        ospf_mpls_te_lsa_schedule(lp,
                REORIGINATE_THIS_LSA);
      }
    }
  }

  /* Create TED and initialize it */
  OspfMplsTE.ted = ls_ted_new(1, "OSPF", 0);
  if (!OspfMplsTE.ted) {
    vty_out(vty, "Unable to create Link State Data Base\n");
    return CMD_WARNING;
  }
  ospf_te_init_ted(OspfMplsTE.ted, ospf);

  return CMD_SUCCESS;
}

DEFUN (no_ospf_mpls_te,
       no_ospf_mpls_te_cmd,
       "no mpls-te [on]",
       NO_STR
       MPLS_TE_STR
       "Disable the MPLS-TE functionality\n")
{
  VTY_DECLVAR_INSTANCE_CONTEXT(ospf, ospf);
  struct listnode *node, *nnode;
  struct mpls_te_link *lp;

  if (!OspfMplsTE.enabled)
    return CMD_SUCCESS;

  ote_debug("MPLS-TE: ON -> OFF");

  /* Remove TED */
  ls_ted_del_all(&OspfMplsTE.ted);
  OspfMplsTE.enabled = false;

  /* Flush all TE Opaque LSAs */
  for (ALL_LIST_ELEMENTS(OspfMplsTE.iflist, node, nnode, lp))
    if (CHECK_FLAG(lp->flags, LPFLG_LSA_ENGAGED))
      ospf_mpls_te_lsa_schedule(lp, FLUSH_THIS_LSA);

  /*
   * This resets the OspfMplsTE.inter_as to its initial state.
   * This is to avoid having an inter-as value different from
   * Off when mpls-te gets restarted (after being removed)
   */
  OspfMplsTE.inter_as = Off;

  return CMD_SUCCESS;
}

DEFUN (ospf_mpls_te_router_addr,
       ospf_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")
{
  VTY_DECLVAR_INSTANCE_CONTEXT(ospf, ospf);
  int idx_ipv4 = 2;
  struct te_tlv_router_addr *ra = &OspfMplsTE.router_addr;
  struct in_addr value;

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

  if (ntohs(ra->header.type) == 0
      || ntohl(ra->value.s_addr) != ntohl(value.s_addr)) {
    struct listnode *node, *nnode;
    struct mpls_te_link *lp;
    int need_to_reoriginate = 0;

    set_mpls_te_router_addr(value);

    if (!OspfMplsTE.enabled)
      return CMD_SUCCESS;

    for (ALL_LIST_ELEMENTS(OspfMplsTE.iflist, node, nnode, lp)) {
      if ((lp->area == NULL) || IS_FLOOD_AS(lp->flags))
        continue;

      if (!CHECK_FLAG(lp->flags, LPFLG_LSA_ENGAGED)) {
        need_to_reoriginate = 1;
        break;
      }
    }

    for (ALL_LIST_ELEMENTS(OspfMplsTE.iflist, node, nnode, lp)) {
      if ((lp->area == NULL) || IS_FLOOD_AS(lp->flags))
        continue;

      if (need_to_reoriginate)
        SET_FLAG(lp->flags, LPFLG_LSA_FORCED_REFRESH);
      else
        ospf_mpls_te_lsa_schedule(lp, REFRESH_THIS_LSA);
    }

    if (need_to_reoriginate)
      ospf_mpls_te_foreach_area(ospf_mpls_te_lsa_schedule,
              REORIGINATE_THIS_LSA);
  }

  return CMD_SUCCESS;
}

static int set_inter_as_mode(struct vty *vty, const char *mode_name,
           const char *area_id)
{
  enum inter_as_mode mode;
  struct listnode *node;
  struct mpls_te_link *lp;
  int format;

  if (OspfMplsTE.enabled) {

    /* Read and Check inter_as mode */
    if (strcmp(mode_name, "as") == 0)
      mode = AS;
    else if (strcmp(mode_name, "area") == 0) {
      mode = Area;
      VTY_GET_OSPF_AREA_ID(OspfMplsTE.interas_areaid, format,
               area_id);
    } else {
      vty_out(vty,
        "Unknown mode. Please choose between as or area\n");
      return CMD_WARNING;
    }

    ote_debug(
      "MPLS-TE (%s): Inter-AS enable with %s flooding support",
      __func__, mode2text[mode]);

    /* Enable mode and re-originate LSA if needed */
    if ((OspfMplsTE.inter_as == Off)
        && (mode != OspfMplsTE.inter_as)) {
      OspfMplsTE.inter_as = mode;
      /* Re-originate all InterAS-TEv2 LSA */
      for (ALL_LIST_ELEMENTS_RO(OspfMplsTE.iflist, node,
              lp)) {
        if (IS_INTER_AS(lp->type)) {
          if (mode == AS)
            SET_FLAG(lp->flags,
               LPFLG_LSA_FLOOD_AS);
          else
            UNSET_FLAG(lp->flags,
                 LPFLG_LSA_FLOOD_AS);
          ospf_mpls_te_lsa_schedule(
            lp, REORIGINATE_THIS_LSA);
        }
      }
    } else {
      vty_out(vty,
        "Please change Inter-AS support to disable first before going to mode %s\n",
        mode2text[mode]);
      return CMD_WARNING;
    }
  } else {
    vty_out(vty, "mpls-te has not been turned on\n");
    return CMD_WARNING;
  }
  return CMD_SUCCESS;
}


DEFUN (ospf_mpls_te_inter_as_as,
       ospf_mpls_te_inter_as_cmd,
       "mpls-te inter-as as",
       MPLS_TE_STR
       "Configure MPLS-TE Inter-AS support\n"
       "AS native mode self originate INTER_AS LSA with Type 11 (as flooding scope)\n")
{
  return set_inter_as_mode(vty, "as", "");
}

DEFUN (ospf_mpls_te_inter_as_area,
       ospf_mpls_te_inter_as_area_cmd,
       "mpls-te inter-as area <A.B.C.D|(0-4294967295)>",
       MPLS_TE_STR
       "Configure MPLS-TE Inter-AS support\n"
       "AREA native mode self originate INTER_AS LSA with Type 10 (area flooding scope)\n"
       "OSPF area ID in IP format\n"
       "OSPF area ID as decimal value\n")
{
  int idx_ipv4_number = 3;
  return set_inter_as_mode(vty, "area", argv[idx_ipv4_number]->arg);
}

DEFUN (no_ospf_mpls_te_inter_as,
       no_ospf_mpls_te_inter_as_cmd,
       "no mpls-te inter-as",
       NO_STR
       MPLS_TE_STR
       "Disable MPLS-TE Inter-AS support\n")
{

  struct listnode *node, *nnode;
  struct mpls_te_link *lp;

  ote_debug("MPLS-TE: Inter-AS support OFF");

  if ((OspfMplsTE.enabled) && (OspfMplsTE.inter_as != Off)) {
    /* Flush all Inter-AS LSA */
    for (ALL_LIST_ELEMENTS(OspfMplsTE.iflist, node, nnode, lp))
      if (IS_INTER_AS(lp->type)
          && CHECK_FLAG(lp->flags, LPFLG_LSA_ENGAGED))
        ospf_mpls_te_lsa_schedule(lp, FLUSH_THIS_LSA);

    OspfMplsTE.inter_as = Off;
  }

  return CMD_SUCCESS;
}

DEFUN (ospf_mpls_te_export,
       ospf_mpls_te_export_cmd,
       "mpls-te export",
       MPLS_TE_STR
       "Export the MPLS-TE information as Link State\n")
{

  VTY_DECLVAR_INSTANCE_CONTEXT(ospf, ospf);

  if (OspfMplsTE.enabled) {
    if (ls_register(zclient, true) != 0) {
      vty_out(vty, "Unable to register Link State\n");
      return CMD_WARNING;
    }
    OspfMplsTE.export = true;
  } else {
    vty_out(vty, "mpls-te has not been turned on\n");
    return CMD_WARNING;
  }
  return CMD_SUCCESS;
}


DEFUN (no_ospf_mpls_te_export,
       no_ospf_mpls_te_export_cmd,
       "no mpls-te export",
       NO_STR
       MPLS_TE_STR
       "Stop export of the MPLS-TE information as Link State\n")
{

  VTY_DECLVAR_INSTANCE_CONTEXT(ospf, ospf);

  if (OspfMplsTE.export) {
    if (ls_unregister(zclient, true) != 0) {
      vty_out(vty, "Unable to unregister Link State\n");
      return CMD_WARNING;
    }
    OspfMplsTE.export = false;
  }
  return CMD_SUCCESS;
}

DEFUN (show_ip_ospf_mpls_te_router,
       show_ip_ospf_mpls_te_router_cmd,
       "show ip ospf mpls-te router",
       SHOW_STR
       IP_STR
       OSPF_STR
       "MPLS-TE information\n"
       "MPLS-TE Router parameters\n")
{
  if (OspfMplsTE.enabled) {
    vty_out(vty, "--- MPLS-TE router parameters ---\n");

    if (ntohs(OspfMplsTE.router_addr.header.type) != 0)
      show_vty_router_addr(vty,
               &OspfMplsTE.router_addr.header);
    else
      vty_out(vty, "  Router address is not set\n");
    vty_out(vty, "  Link State distribution is %s\n",
      OspfMplsTE.export ? "Active" : "Inactive");
  }
  return CMD_SUCCESS;
}

static void show_mpls_te_link_sub(struct vty *vty, struct interface *ifp)
{
  struct mpls_te_link *lp;

  if ((OspfMplsTE.enabled) && HAS_LINK_PARAMS(ifp) && !if_is_loopback(ifp)
      && if_is_up(ifp)
      && ((lp = lookup_linkparams_by_ifp(ifp)) != NULL)) {
    /* Continue only if interface is not passive or support Inter-AS
     * TEv2 */
    if (!(ospf_oi_count(ifp) > 0)) {
      if (IS_INTER_AS(lp->type)) {
        vty_out(vty,
          "-- Inter-AS TEv2 link parameters for %s --\n",
          ifp->name);
      } 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\n",
          ifp->name);
        return;
      }
    } else {
      vty_out(vty, "-- MPLS-TE link parameters for %s --\n",
        ifp->name);
    }

    if (TLV_TYPE(lp->link_type) != 0)
      show_vty_link_subtlv_link_type(vty,
                   &lp->link_type.header);
    if (TLV_TYPE(lp->link_id) != 0)
      show_vty_link_subtlv_link_id(vty, &lp->link_id.header);
    if (TLV_TYPE(lp->lclif_ipaddr) != 0)
      show_vty_link_subtlv_lclif_ipaddr(
        vty, &lp->lclif_ipaddr.header,
        lp->lclif_ipaddr.header.length);
    if (TLV_TYPE(lp->rmtif_ipaddr) != 0)
      show_vty_link_subtlv_rmtif_ipaddr(
        vty, &lp->rmtif_ipaddr.header,
        lp->rmtif_ipaddr.header.length);
    if (TLV_TYPE(lp->rip) != 0)
      show_vty_link_subtlv_rip(vty, &lp->rip.header);
    if (TLV_TYPE(lp->ras) != 0)
      show_vty_link_subtlv_ras(vty, &lp->ras.header);
    if (TLV_TYPE(lp->te_metric) != 0)
      show_vty_link_subtlv_te_metric(vty,
                   &lp->te_metric.header);
    if (TLV_TYPE(lp->max_bw) != 0)
      show_vty_link_subtlv_max_bw(vty, &lp->max_bw.header);
    if (TLV_TYPE(lp->max_rsv_bw) != 0)
      show_vty_link_subtlv_max_rsv_bw(vty,
              &lp->max_rsv_bw.header);
    if (TLV_TYPE(lp->unrsv_bw) != 0)
      show_vty_link_subtlv_unrsv_bw(vty,
                  &lp->unrsv_bw.header);
    if (TLV_TYPE(lp->rsc_clsclr) != 0)
      show_vty_link_subtlv_rsc_clsclr(vty,
              &lp->rsc_clsclr.header);
    if (TLV_TYPE(lp->av_delay) != 0)
      show_vty_link_subtlv_av_delay(vty,
                  &lp->av_delay.header);
    if (TLV_TYPE(lp->mm_delay) != 0)
      show_vty_link_subtlv_mm_delay(vty,
                  &lp->mm_delay.header);
    if (TLV_TYPE(lp->delay_var) != 0)
      show_vty_link_subtlv_delay_var(vty,
                   &lp->delay_var.header);
    if (TLV_TYPE(lp->pkt_loss) != 0)
      show_vty_link_subtlv_pkt_loss(vty,
                  &lp->pkt_loss.header);
    if (TLV_TYPE(lp->res_bw) != 0)
      show_vty_link_subtlv_res_bw(vty, &lp->res_bw.header);
    if (TLV_TYPE(lp->ava_bw) != 0)
      show_vty_link_subtlv_ava_bw(vty, &lp->ava_bw.header);
    if (TLV_TYPE(lp->use_bw) != 0)
      show_vty_link_subtlv_use_bw(vty, &lp->use_bw.header);
    vty_out(vty, "---------------\n\n");
  } else {
    vty_out(vty, "  %s: MPLS-TE is disabled on this interface\n",
      ifp->name);
  }

  return;
}

DEFUN (show_ip_ospf_mpls_te_link,
       show_ip_ospf_mpls_te_link_cmd,
       "show ip ospf mpls-te interface [INTERFACE]",
       SHOW_STR
       IP_STR
       OSPF_STR
       "MPLS-TE information\n"
       "Interface information\n"
       "Interface name\n")
{
  struct vrf *vrf;
  int idx_interface = 0;
  struct interface *ifp = NULL;
  struct ospf *ospf = NULL;

  argv_find(argv, argc, "INTERFACE", &idx_interface);
  ospf = ospf_lookup_by_vrf_id(VRF_DEFAULT);
  if (ospf == NULL || !ospf->oi_running)
    return CMD_SUCCESS;

  vrf = vrf_lookup_by_id(VRF_DEFAULT);
  if (!vrf)
    return CMD_SUCCESS;
  if (idx_interface) {
    ifp = if_lookup_by_name(argv[idx_interface]->arg, VRF_DEFAULT);
    if (ifp == NULL) {
      vty_out(vty, "No such interface name in vrf %s\n",
        vrf->name);
      return CMD_SUCCESS;
    }
  }
  if (!ifp) {
    FOR_ALL_INTERFACES (vrf, ifp)
      show_mpls_te_link_sub(vty, ifp);
    return CMD_SUCCESS;
  }

  show_mpls_te_link_sub(vty, ifp);
  return CMD_SUCCESS;
}

DEFUN (show_ip_ospf_mpls_te_db,
       show_ip_ospf_mpls_te_db_cmd,
       "show ip ospf mpls-te database [<vertex [<self-originate|adv-router A.B.C.D>]|edge [A.B.C.D]|subnet [A.B.C.D/M]>] [verbose|json]",
       SHOW_STR
       IP_STR
       OSPF_STR
       "MPLS-TE information\n"
       "MPLS-TE database\n"
       "MPLS-TE Vertex\n"
       "Self-originated MPLS-TE router\n"
       "Advertised MPLS-TE router\n"
       "MPLS-TE router ID (as an IP address)\n"
       "MPLS-TE Edge\n"
       "MPLS-TE Edge ID (as an IP address)\n"
       "MPLS-TE Subnet\n"
       "MPLS-TE Subnet ID (as an IP prefix)\n"
       "Verbose output\n"
       JSON_STR)
{
  int idx = 0;
  struct in_addr ip_addr;
  struct prefix pref;
  struct ls_vertex *vertex;
  struct ls_edge *edge;
  struct ls_subnet *subnet;
  uint64_t key;
  struct ls_edge_key ekey;
  bool verbose = false;
  bool uj = use_json(argc, argv);
  json_object *json = NULL;

  if (!OspfMplsTE.enabled || !OspfMplsTE.ted) {
    vty_out(vty, "MPLS-TE database is not enabled\n");
    return CMD_WARNING;
  }

  if (uj)
    json = json_object_new_object();

  if (argv[argc - 1]->arg && strmatch(argv[argc - 1]->text, "verbose"))
    verbose = true;

  idx = 5;
  if (argv_find(argv, argc, "vertex", &idx)) {
    /* Show Vertex */
    if (argv_find(argv, argc, "self-originate", &idx))
      vertex = OspfMplsTE.ted->self;
    else if (argv_find(argv, argc, "adv-router", &idx)) {
      if (!inet_aton(argv[idx + 1]->arg, &ip_addr)) {
        vty_out(vty,
          "Specified Router ID %s is invalid\n",
          argv[idx + 1]->arg);
        return CMD_WARNING_CONFIG_FAILED;
      }
      /* Get the Vertex from the Link State Database */
      key = ((uint64_t)ntohl(ip_addr.s_addr)) & 0xffffffff;
      vertex = ls_find_vertex_by_key(OspfMplsTE.ted, key);
      if (!vertex) {
        vty_out(vty, "No vertex found for ID %pI4\n",
          &ip_addr);
        return CMD_WARNING;
      }
    } else
      vertex = NULL;

    if (vertex)
      ls_show_vertex(vertex, vty, json, verbose);
    else
      ls_show_vertices(OspfMplsTE.ted, vty, json, verbose);

  } else if (argv_find(argv, argc, "edge", &idx)) {
    /* Show Edge */
    if (argv_find(argv, argc, "A.B.C.D", &idx)) {
      if (!inet_aton(argv[idx]->arg, &ip_addr)) {
        vty_out(vty,
          "Specified Edge ID %s is invalid\n",
          argv[idx]->arg);
        return CMD_WARNING_CONFIG_FAILED;
      }
      /* Get the Edge from the Link State Database */
      ekey.family = AF_INET;
      IPV4_ADDR_COPY(&ekey.k.addr, &ip_addr);
      edge = ls_find_edge_by_key(OspfMplsTE.ted, ekey);
      if (!edge) {
        vty_out(vty, "No edge found for ID %pI4\n",
          &ip_addr);
        return CMD_WARNING;
      }
    } else
      edge = NULL;

    if (edge)
      ls_show_edge(edge, vty, json, verbose);
    else
      ls_show_edges(OspfMplsTE.ted, vty, json, verbose);

  } else if (argv_find(argv, argc, "subnet", &idx)) {
    /* Show Subnet */
    if (argv_find(argv, argc, "A.B.C.D/M", &idx)) {
      if (!str2prefix(argv[idx]->arg, &pref)) {
        vty_out(vty, "Invalid prefix format %s\n",
          argv[idx]->arg);
        return CMD_WARNING_CONFIG_FAILED;
      }
      /* Get the Subnet from the Link State Database */
      subnet = ls_find_subnet(OspfMplsTE.ted, &pref);
      if (!subnet) {
        vty_out(vty, "No subnet found for ID %pFX\n",
          &pref);
        return CMD_WARNING;
      }
    } else
      subnet = NULL;

    if (subnet)
      ls_show_subnet(subnet, vty, json, verbose);
    else
      ls_show_subnets(OspfMplsTE.ted, vty, json, verbose);

  } else {
    /* Show the complete TED */
    ls_show_ted(OspfMplsTE.ted, vty, json, verbose);
  }

  if (uj)
    vty_json(vty, json);
  return CMD_SUCCESS;
}

static void ospf_mpls_te_register_vty(void)
{
  install_element(VIEW_NODE, &show_ip_ospf_mpls_te_router_cmd);
  install_element(VIEW_NODE, &show_ip_ospf_mpls_te_link_cmd);
  install_element(VIEW_NODE, &show_ip_ospf_mpls_te_db_cmd);

  install_element(OSPF_NODE, &ospf_mpls_te_on_cmd);
  install_element(OSPF_NODE, &no_ospf_mpls_te_cmd);
  install_element(OSPF_NODE, &ospf_mpls_te_router_addr_cmd);
  install_element(OSPF_NODE, &ospf_mpls_te_inter_as_cmd);
  install_element(OSPF_NODE, &ospf_mpls_te_inter_as_area_cmd);
  install_element(OSPF_NODE, &no_ospf_mpls_te_inter_as_cmd);
  install_element(OSPF_NODE, &ospf_mpls_te_export_cmd);
  install_element(OSPF_NODE, &no_ospf_mpls_te_export_cmd);

  return;
}

Coverage Report

Created: 2026-01-01 06:18