rt-thread-official/components/net/lwip-nat/ipv4_nat.h

82 lines
2.7 KiB
C

/**
* NAT - NAT implementation for lwIP supporting TCP/UDP and ICMP.
* Copyright (c) 2009 Christian Walter, ?Embedded Solutions, Vienna 2009.
* Copyright (c) 2010 lwIP project ;-)
* COPYRIGHT (C) 2015, RT-Thread Development Team
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* Change Logs:
* Date Author Notes
* 2015-01-26 Hichard porting to RT-Thread
* 2015-01-27 Bernard code cleanup for lwIP in RT-Thread
*/
#ifndef __LWIP_NAT_H__
#define __LWIP_NAT_H__
#include <rtthread.h>
#ifdef LWIP_USING_NAT
#include "lwip/err.h"
#include "lwip/ip_addr.h"
#include "lwip/opt.h"
/** Timer interval at which to call ip_nat_tmr() */
#define LWIP_NAT_TMR_INTERVAL_SEC (30)
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
struct netif;
struct pbuf;
typedef struct ip_nat_entry
{
ip_addr_t source_net;
ip_addr_t source_netmask;
ip_addr_t dest_net;
ip_addr_t dest_netmask;
struct netif *out_if;
struct netif *in_if;
} ip_nat_entry_t;
void ip_nat_init(void);
void ip_nat_tmr(void);
u8_t ip_nat_input(struct pbuf *p);
u8_t ip_nat_out(struct pbuf *p);
err_t ip_nat_add(const ip_nat_entry_t *new_entry);
void ip_nat_remove(const ip_nat_entry_t *remove_entry);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* IP_NAT */
#endif /* __LWIP_NAT_H__ */