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/*
* Copyright (c) 2019 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 NAT active-passive HA
*/
#ifndef __included_nat_ha_h__
#define __included_nat_ha_h__
#include <vnet/vnet.h>
#include <vnet/ip/ip.h>
/* Call back functions for received HA events on passive/failover */
typedef void (*nat_ha_sadd_cb_t) (ip4_address_t * in_addr, u16 in_port,
ip4_address_t * out_addr, u16 out_port,
ip4_address_t * eh_addr, u16 eh_port,
ip4_address_t * ehn_addr, u16 ehn_port,
u8 proto, u32 fib_index, u16 flags,
u32 thread_index);
typedef void (*nat_ha_sdel_cb_t) (ip4_address_t * out_addr, u16 out_port,
ip4_address_t * eh_addr, u16 eh_port,
u8 proto, u32 fib_index, u32 thread_index);
typedef void (*nat_ha_sref_cb_t) (ip4_address_t * out_addr, u16 out_port,
ip4_address_t * eh_addr, u16 eh_port,
u8 proto, u32 fib_index, u32 total_pkts,
u64 total_bytes, u32 thread_index);
/**
* @brief Enable NAT HA, set callbacks
*/
void nat_ha_enable (nat_ha_sadd_cb_t sadd_cb, nat_ha_sdel_cb_t sdel_cb,
nat_ha_sref_cb_t sref_cb);
/**
* @brief Initialize NAT HA
*/
void nat_ha_init (vlib_main_t * vm, u32 num_workers, u32 num_threads);
/**
* @brief Set HA listener (local settings)
*
* @param addr local IP4 address
* @param port local UDP port number
* @param path_mtu path MTU between local and failover
*
* @returns 0 on success, non-zero value otherwise.
*/
int nat_ha_set_listener (ip4_address_t * addr, u16 port, u32 path_mtu);
/**
* @brief Get HA listener/local configuration
*/
void nat_ha_get_listener (ip4_address_t * addr, u16 * port, u32 * path_mtu);
/**
* @brief Set HA failover (remote settings)
*
* @param addr failover IP4 address
* @param port failvoer UDP port number
* @param session_refresh_interval number of seconds after which to send
* session counters refresh
*
* @returns 0 on success, non-zero value otherwise.
*/
int nat_ha_set_failover (ip4_address_t * addr, u16 port,
u32 session_refresh_interval);
/**
* @brief Get HA failover/remote settings
*/
void nat_ha_get_failover (ip4_address_t * addr, u16 * port,
u32 * session_refresh_interval);
/**
* @brief Create session add HA event
*
* @param in_addr inside IPv4 address
* @param in_port inside L4 port number
* @param out_addr outside IPv4 address
* @param out_port outside L4 port number
* @param eh_addr external host IPv4 address
* @param eh_port external host L4 port number
* @param ehn_addr external host IPv4 address after translation
* @param ehn_port external host L4 port number after translation
* @param proto L4 protocol
* @param fib_index fib index
* @param flags session flags
* @param thread_index thread index
* @param is_resync 1 if HA resync
*/
void nat_ha_sadd (ip4_address_t * in_addr, u16 in_port,
ip4_address_t * out_addr, u16 out_port,
ip4_address_t * eh_addr, u16 eh_port,
ip4_address_t * ehn_addr, u16 ehn_port, u8 proto,
u32 fib_index, u16 flags, u32 thread_index, u8 is_resync);
/**
* @brief Create session delete HA event
*
* @param out_addr outside IPv4 address
* @param out_port outside L4 port number
* @param eh_addr external host IPv4 address
* @param eh_port external host L4 port number
* @param proto L4 protocol
* @param fib_index fib index
* @param thread_index thread index
*/
void nat_ha_sdel (ip4_address_t * out_addr, u16 out_port,
ip4_address_t * eh_addr, u16 eh_port, u8 proto,
u32 fib_index, u32 thread_index);
/**
* @brief Create session refresh HA event
*
* @param out_addr outside IPv4 address
* @param out_port outside L4 port number
* @param eh_addr external host IPv4 address
* @param eh_port external host L4 port number
* @param proto L4 protocol
* @param fib_index fib index
* @param total_pkts total packets processed
* @param total_bytes total bytes processed
* @param thread_index thread index
* @param last_refreshed last session refresh time
* @param now current time
*/
void nat_ha_sref (ip4_address_t * out_addr, u16 out_port,
ip4_address_t * eh_addr, u16 eh_port, u8 proto,
u32 fib_index, u32 total_pkts, u64 total_bytes,
u32 thread_index, f64 * last_refreshed, f64 now);
/**
* @brief Flush the current HA data (for testing)
*/
void nat_ha_flush (u8 is_resync);
typedef void (*nat_ha_resync_event_cb_t) (u32 client_index, u32 pid,
u32 missed_count);
/**
* @brief Resync HA (resend existing sessions to new failover)
*/
int nat_ha_resync (u32 client_index, u32 pid,
nat_ha_resync_event_cb_t event_callback);
/**
* @brief Get resync status
*
* @param in_resync 1 if resync in progress
* @param resync_ack_missed number of missed (not ACKed) messages
*/
void nat_ha_get_resync_status (u8 * in_resync, u32 * resync_ack_missed);
#endif /* __included_nat_ha_h__ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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