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

/**

 * @copyright Copyright (C) 2015 Cumulus Networks, Inc.

 */

#include <zebra.h>

#include "prefix.h"

#include "vty.h"

#include "stream.h"

#include "zebra/zebra_router.h"

#include "zebra/zapi_msg.h"

#include "zebra/zebra_ptm.h"

#include "zebra/zebra_ptm_redistribute.h"

static int zsend_interface_bfd_update(int cmd, struct zserv *client,

              struct interface *ifp, struct prefix *dp,

              struct prefix *sp, int status,

              vrf_id_t vrf_id)

{

  int blen;

  struct stream *s;

  s = stream_new(ZEBRA_MAX_PACKET_SIZ);

  zclient_create_header(s, cmd, vrf_id);

  if (ifp)

    stream_putl(s, ifp->ifindex);

  else

    stream_putl(s, 0);

  /* BFD destination prefix information. */

  stream_putc(s, dp->family);

  blen = prefix_blen(dp);

  stream_put(s, &dp->u.prefix, blen);

  stream_putc(s, dp->prefixlen);

  /* BFD status */

  stream_putl(s, status);

  /* BFD source prefix information. */

  stream_putc(s, sp->family);

  blen = prefix_blen(sp);

  stream_put(s, &sp->u.prefix, blen);

  stream_putc(s, sp->prefixlen);

  /* c-bit bullshit */

  stream_putc(s, 0);

  /* Write packet size. */

  stream_putw_at(s, 0, stream_get_endp(s));

  client->if_bfd_cnt++;

  return zserv_send_message(client, s);

}

void zebra_interface_bfd_update(struct interface *ifp, struct prefix *dp,

        struct prefix *sp, int status, vrf_id_t vrf_id)

{

  struct listnode *node, *nnode;

  struct zserv *client;

  for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {

    if (!IS_BFD_ENABLED_PROTOCOL(client->proto))

      continue;

    /* Notify to the protocol daemons. */

    zsend_interface_bfd_update(ZEBRA_INTERFACE_BFD_DEST_UPDATE,

             client, ifp, dp, sp, status, vrf_id);

  }

}

static int zsend_bfd_peer_replay(int cmd, struct zserv *client)

{

  struct stream *s;

  s = stream_new(ZEBRA_MAX_PACKET_SIZ);

  zclient_create_header(s, cmd, VRF_DEFAULT);

  /* Write packet size. */

  stream_putw_at(s, 0, stream_get_endp(s));

  client->bfd_peer_replay_cnt++;

  return zserv_send_message(client, s);

}

void zebra_bfd_peer_replay_req(void)

{

  struct listnode *node, *nnode;

  struct zserv *client;

  for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {

    if (!IS_BFD_ENABLED_PROTOCOL(client->proto))

      continue;

    /* Notify to the protocol daemons. */

    zsend_bfd_peer_replay(ZEBRA_BFD_DEST_REPLAY, client);

  }

}