/*
 * Copyright (c) 2018 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.
 */
/**
 * @file
 * @brief NAT66 global declarations
 */
#ifndef __included_nat66_h__
#define __included_nat66_h__

#include <vppinfra/bihash_24_8.h>
#include <nat/nat.h>

typedef struct
{
  ip6_address_t l_addr;
  ip6_address_t e_addr;
  u32 fib_index;
} nat66_static_mapping_t;

typedef struct
{
  union
  {
    struct
    {
      ip6_address_t addr;
      u32 fib_index;
      u32 rsvd;
    };
    u64 as_u64[3];
  };
} nat66_sm_key_t;

typedef struct
{
  /** Interface pool */
  snat_interface_t *interfaces;
  /** Static mapping pool */
  nat66_static_mapping_t *sm;
  /** Static mapping by local address lookup table */
  clib_bihash_24_8_t sm_l;
  /** Static mapping by external address lookup table */
  clib_bihash_24_8_t sm_e;
  /** Session counters */
  vlib_combined_counter_main_t session_counters;
  /** node index **/
  u32 in2out_node_index;
  u32 out2in_node_index;

  u32 outside_vrf_id;
  u32 outside_fib_index;
} nat66_main_t;

extern nat66_main_t nat66_main;
extern vlib_node_registration_t nat66_in2out_node;
extern vlib_node_registration_t nat66_out2in_node;

void nat66_init (vlib_main_t * vm);
typedef int (*nat66_interface_walk_fn_t) (snat_interface_t * i, void *ctx);
void nat66_interfaces_walk (nat66_interface_walk_fn_t fn, void *ctx);
int nat66_interface_add_del (u32 sw_if_index, u8 is_inside, u8 is_add);
typedef int (*nat66_static_mapping_walk_fn_t) (nat66_static_mapping_t * sm,
					       void *ctx);
void nat66_static_mappings_walk (nat66_static_mapping_walk_fn_t fn,
				 void *ctx);
nat66_static_mapping_t *nat66_static_mapping_get (ip6_address_t * addr,
						  u32 fib_index, u8 is_local);
int nat66_static_mapping_add_del (ip6_address_t * l_addr,
				  ip6_address_t * e_addr, u32 vrf_id,
				  u8 is_add);

#endif /* __included_nat66_h__ */

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