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/*

 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.

 * 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.

 *

 * This file is part of the lwIP TCP/IP stack.

 *

 * Author: Adam Dunkels <adam@sics.se>

 *

 */

#ifndef __LWIP_IP_H__

#define __LWIP_IP_H__

#include "lwip/opt.h"

#include "lwip/def.h"

#include "lwip/pbuf.h"

#include "lwip/ip_addr.h"

#include "lwip/err.h"

#ifdef __cplusplus

extern "C" {

#endif

#define IP_HLEN 40

#define IP_PROTO_ICMP    58

#define IP_PROTO_UDP     17

#define IP_PROTO_UDPLITE 136

#define IP_PROTO_TCP     6

/* This is passed as the destination address to ip_output_if (not

   to ip_output), meaning that an IP header already is constructed

   in the pbuf. This is used when TCP retransmits. */

#ifdef IP_HDRINCL

#undef IP_HDRINCL

#endif /* IP_HDRINCL */

#define IP_HDRINCL  NULL

#if LWIP_NETIF_HWADDRHINT

#define IP_PCB_ADDRHINT ;u8_t addr_hint

#else

#define IP_PCB_ADDRHINT

#endif /* LWIP_NETIF_HWADDRHINT */

/* This is the common part of all PCB types. It needs to be at the

   beginning of a PCB type definition. It is located here so that

   changes to this common part are made in one location instead of

   having to change all PCB structs. */

#define IP_PCB struct ip_addr local_ip; \

  struct ip_addr remote_ip; \

   /* Socket options */  \

  u16_t so_options;      \

   /* Type Of Service */ \

  u8_t tos;              \

  /* Time To Live */     \

  u8_t ttl;              \

  /* link layer address resolution hint */ \

  IP_PCB_ADDRHINT

/* The IPv6 header. */

struct ip_hdr {

#if BYTE_ORDER == LITTLE_ENDIAN

  u8_t tclass1:4, v:4;

  u8_t flow1:4, tclass2:4;

#else

  u8_t v:4, tclass1:4;

  u8_t tclass2:8, flow1:4;

#endif

  u16_t flow2;

  u16_t len;                /* payload length */

  u8_t nexthdr;             /* next header */

  u8_t hoplim;              /* hop limit (TTL) */

  struct ip_addr src, dest;          /* source and destination IP addresses */

};

#define IPH_PROTO(hdr) (iphdr->nexthdr)

void ip_init(void);

#include "lwip/netif.h"

struct netif *ip_route(struct ip_addr *dest);

void ip_input(struct pbuf *p, struct netif *inp);

/* source and destination addresses in network byte order, please */

err_t ip_output(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,

         u8_t ttl, u8_t proto);

err_t ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,

      u8_t ttl, u8_t proto,

      struct netif *netif);

#if IP_DEBUG

void ip_debug_print(struct pbuf *p);

#endif /* IP_DEBUG */

#ifdef __cplusplus

}

#endif

#endif /* __LWIP_IP_H__ */