/*
 * Copyright (c) 2001-2003 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 __NETIF_ETHARP_H__
# define __NETIF_ETHARP_H__

# include "lwip/pbuf.h"
# include "lwip/ip_addr.h"
# include "lwip/netif.h"
# include "lwip/ip.h"

# ifdef PACK_STRUCT_USE_INCLUDES
#  include "arch/bpstruct.h"
# endif  /* PACK_STRUCT_USE_INCLUDES */

PACK_STRUCT_BEGIN
struct eth_addr {
 PACK_STRUCT_FIELD( u8_t addr[ 6 ] );
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END

PACK_STRUCT_BEGIN
struct eth_hdr {
 PACK_STRUCT_FIELD( struct eth_addr dest );
 PACK_STRUCT_FIELD( struct eth_addr src  );
 PACK_STRUCT_FIELD( u16_t type           );
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END

PACK_STRUCT_BEGIN
struct etharp_hdr {
 PACK_STRUCT_FIELD( struct eth_hdr ethhdr   );
 PACK_STRUCT_FIELD( u16_t hwtype            );
 PACK_STRUCT_FIELD( u16_t proto             );
 PACK_STRUCT_FIELD( u16_t _hwlen_protolen   );
 PACK_STRUCT_FIELD( u16_t opcode            );
 PACK_STRUCT_FIELD( struct eth_addr shwaddr );
 PACK_STRUCT_FIELD( struct ip_addr sipaddr  );
 PACK_STRUCT_FIELD( struct eth_addr dhwaddr );
 PACK_STRUCT_FIELD( struct ip_addr dipaddr  );
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END

PACK_STRUCT_BEGIN
struct ethip_hdr {
 PACK_STRUCT_FIELD( struct eth_hdr eth );
 PACK_STRUCT_FIELD( struct ip_hdr ip   );
};
PACK_STRUCT_END

# ifdef PACK_STRUCT_USE_INCLUDES
#  include "arch/epstruct.h"
# endif  /* PACK_STRUCT_USE_INCLUDES */

# define ARP_TMR_INTERVAL 10000
# define ETHTYPE_ARP      0x0608
# define ETHTYPE_IP       0x0008

void         etharp_init      ( void                                          );
void         etharp_tmr       ( void                                          );
void         etharp_ip_input  ( struct netif*, struct pbuf*                   );
void         etharp_arp_input ( struct netif*, struct eth_addr*, struct pbuf* );
struct pbuf* etharp_output    ( struct netif*, struct ip_addr*,  struct pbuf* );
err_t        etharp_query     ( struct netif*, struct ip_addr*,  struct pbuf* );
#endif  /* __NETIF_ARP_H__ */
