// SPDX-License-Identifier: GPL-2.0-or-later

/*

 * ldp_sync.c: LDP-SYNC handling routines

 * Copyright (C) 2020 Volta Networks, Inc.

 */

#include <zebra.h>

#include "command.h"

#include "memory.h"

#include "prefix.h"

#include "log.h"

#include "frrevent.h"

#include "stream.h"

#include "zclient.h"

#include "table.h"

#include "vty.h"

#include "ldp_sync.h"

/* Library code */

DEFINE_MTYPE_STATIC(LIB, LDP_SYNC_INFO, "LDP SYNC info");

/*

 * ldp_sync_info_create - Allocate the LDP_SYNC information

 */

struct ldp_sync_info *ldp_sync_info_create(void)

{

  struct ldp_sync_info *ldp_sync_info;

  ldp_sync_info = XCALLOC(MTYPE_LDP_SYNC_INFO,

        sizeof(struct ldp_sync_info));

  assert(ldp_sync_info);

  ldp_sync_info->flags = 0;

  ldp_sync_info->enabled = LDP_IGP_SYNC_DEFAULT;

  ldp_sync_info->state = LDP_IGP_SYNC_STATE_NOT_REQUIRED;

  ldp_sync_info->holddown = LDP_IGP_SYNC_HOLDDOWN_DEFAULT;

  ldp_sync_info->t_holddown = NULL;

  return ldp_sync_info;

}

/*

 * ldp_sync_info_free - Free the LDP_SYNC information.

 */

void ldp_sync_info_free(struct ldp_sync_info **ldp_sync_info)

{

  if (*ldp_sync_info)

    XFREE(MTYPE_LDP_SYNC_INFO, *ldp_sync_info);

}

bool ldp_sync_if_is_enabled(struct ldp_sync_info *ldp_sync_info)

{

  /* return true if LDP-SYNC is configured on this interface */

  if (ldp_sync_info &&

      ldp_sync_info->enabled == LDP_IGP_SYNC_ENABLED &&

      ldp_sync_info->state == LDP_IGP_SYNC_STATE_REQUIRED_NOT_UP)

    return true;

  return false;

}

bool ldp_sync_if_down(struct ldp_sync_info *ldp_sync_info)

{

  /* Stop LDP-SYNC on this interface:

   *   if holddown timer is running stop it

   *   update state

   */

  if (ldp_sync_info && ldp_sync_info->enabled == LDP_IGP_SYNC_ENABLED) {

    EVENT_OFF(ldp_sync_info->t_holddown);

    if (ldp_sync_info->state == LDP_IGP_SYNC_STATE_REQUIRED_UP)

      ldp_sync_info->state =

        LDP_IGP_SYNC_STATE_REQUIRED_NOT_UP;

    return true;

  }

  return false;

}