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

/*

 * Copyright (C) 2018        Vmware

 *                           Vishal Dhingra

 */

#include <zebra.h>

#include "northbound.h"

#include "libfrr.h"

#include "vrf.h"

#include "lib_errors.h"

#include "routing_nb.h"

DEFINE_HOOK(routing_conf_event, (struct nb_cb_create_args *args), (args));

/*

 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol

 */

int routing_control_plane_protocols_control_plane_protocol_create(

  struct nb_cb_create_args *args)

{

  struct vrf *vrf;

  const char *vrfname;

  switch (args->event) {

  case NB_EV_VALIDATE:

    if (hook_call(routing_conf_event, args))

      return NB_ERR_VALIDATION;

    break;

  case NB_EV_PREPARE:

  case NB_EV_ABORT:

    break;

  case NB_EV_APPLY:

    /*

     * If the daemon relies on the VRF pointer stored in this

     * dnode, then it should register the dependency between this

     * module and the VRF module using

     * routing_control_plane_protocols_register_vrf_dependency.

     * If such dependency is not registered, then nothing is

     * stored in the dnode. If the dependency is registered,

     * find the vrf and store the pointer.

     */

    if (nb_node_has_dependency(args->dnode->schema->priv)) {

      vrfname = yang_dnode_get_string(args->dnode, "./vrf");

      vrf = vrf_lookup_by_name(vrfname);

      assert(vrf);

      nb_running_set_entry(args->dnode, vrf);

    }

    break;

  };

  return NB_OK;

}

int routing_control_plane_protocols_control_plane_protocol_destroy(

  struct nb_cb_destroy_args *args)

{

  if (args->event != NB_EV_APPLY)

    return NB_OK;

  /*

   * If dependency on VRF module is registered, then VRF

   * pointer was stored and must be cleared.

   */

  if (nb_node_has_dependency(args->dnode->schema->priv))

    nb_running_unset_entry(args->dnode);

  return NB_OK;

}

static void vrf_to_control_plane_protocol(const struct lyd_node *dnode,

            char *xpath)

{

  const char *vrf;

  vrf = yang_dnode_get_string(dnode, "./name");

  snprintf(xpath, XPATH_MAXLEN, FRR_ROUTING_KEY_XPATH_VRF, vrf);

}

static void control_plane_protocol_to_vrf(const struct lyd_node *dnode,

            char *xpath)

{

  const char *vrf;

  vrf = yang_dnode_get_string(dnode, "./vrf");

  snprintf(xpath, XPATH_MAXLEN, FRR_VRF_KEY_XPATH, vrf);

}

void routing_control_plane_protocols_register_vrf_dependency(void)

{

  struct nb_dependency_callbacks cbs;

  cbs.get_dependant_xpath = vrf_to_control_plane_protocol;

  cbs.get_dependency_xpath = control_plane_protocol_to_vrf;

  nb_node_set_dependency_cbs(FRR_VRF_XPATH, FRR_ROUTING_XPATH, &cbs);

}