/* * 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 __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"#endifPACK_STRUCT_BEGINstruct eth_addr {  PACK_STRUCT_FIELD(u8_t addr[6]);} PACK_STRUCT_STRUCT;PACK_STRUCT_ENDPACK_STRUCT_BEGINstruct 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_ENDPACK_STRUCT_BEGIN/** the ARP message */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_ENDPACK_STRUCT_BEGINstruct ethip_hdr {  PACK_STRUCT_FIELD(struct eth_hdr eth);  PACK_STRUCT_FIELD(struct ip_hdr ip);};#ifdef PACK_STRUCT_USE_INCLUDES#  include "arch/epstruct.h"#endif#define ARP_TMR_INTERVAL 10000#define ETHTYPE_ARP 0x0806#define ETHTYPE_IP  0x0800void etharp_init(void);void etharp_tmr(void);struct pbuf *etharp_ip_input(struct netif *netif, struct pbuf *p);struct pbuf *etharp_arp_input(struct netif *netif, struct eth_addr *ethaddr,         struct pbuf *p);struct pbuf *etharp_output(struct netif *netif, struct ip_addr *ipaddr,         struct pbuf *q);err_t etharp_query(struct netif *netif, struct ip_addr *ipaddr, struct pbuf *q);#endif /* __NETIF_ARP_H__ */