/*
 * Copyright (c) 2015 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef included_vnet_mpls_h
#define included_vnet_mpls_h

#include <vnet/vnet.h>
#include <vnet/mpls/packet.h>
#include <vnet/mpls/mpls_types.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/fib/fib_node.h>
#include <vnet/adj/adj.h>

struct mpls_main_t;

/**
 * @brief Definition of a callback for receiving MPLS interface state change
 * notifications
 */
typedef void (mpls_interface_state_change_function_t) (struct mpls_main_t *mm,
						       uword opaque,
						       u32 sw_if_index,
						       u32 is_enable);

typedef struct mpls_main_t
{
  /* MPLS FIB index for each software interface */
  u32 *fib_index_by_sw_if_index;

  /**  A pool of all the MPLS FIBs */
  struct fib_table_t_ *fibs;

  /**  A pool of all the MPLS FIBs */
  struct mpls_fib_t_ *mpls_fibs;

  /** A hash table to lookup the mpls_fib by table ID */
  uword *fib_index_by_table_id;

  /* Feature arc indices */
  u8 input_feature_arc_index;
  u8 output_feature_arc_index;

  /* IP4 enabled count by software interface */
  u8 *mpls_enabled_by_sw_if_index;

  u32 mpls_lookup_node_index;
  u16 msg_id_base;
} mpls_main_t;

extern mpls_main_t mpls_main;

extern clib_error_t *mpls_feature_init (vlib_main_t * vm);

format_function_t format_mpls_eos_bit;
format_function_t format_mpls_unicast_header_net_byte_order;
format_function_t format_mpls_unicast_label;
format_function_t format_mpls_header;

extern vlib_node_registration_t mpls_input_node;
extern vlib_node_registration_t mpls_output_node;
extern vlib_node_registration_t mpls_midchain_node;

/* Parse mpls protocol as 0xXXXX or protocol name.
   In either host or network byte order. */
unformat_function_t unformat_mpls_label_net_byte_order;
unformat_function_t unformat_mpls_unicast_label;

/* Parse mpls header. */
unformat_function_t unformat_mpls_header;
unformat_function_t unformat_pg_mpls_header;

u8 mpls_sw_interface_is_enabled (u32 sw_if_index);

void mpls_interface_state_change_add_callback (
  mpls_interface_state_change_function_t *function, uword opaque);

int mpls_sw_interface_enable_disable (mpls_main_t *mm, u32 sw_if_index,
				      u8 is_enable);

int mpls_dest_cmp (void *a1, void *a2);

int mpls_fib_index_cmp (void *a1, void *a2);

int mpls_label_cmp (void *a1, void *a2);

void mpls_table_create (u32 table_id, u8 is_api, const u8 * name);
void mpls_table_delete (u32 table_id, u8 is_api);

#endif /* included_vnet_mpls_h */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */