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/*
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* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
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* Copyright (c) 2003-2004 Leon Woestenberg <leon.woestenberg@axon.tv>
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* Copyright (c) 2003-2004 Axon Digital Design B.V., The Netherlands.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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*/
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#ifndef __NETIF_ETHARP_H__
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#define __NETIF_ETHARP_H__
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#include "lwip/opt.h"
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#if LWIP_ARP || LWIP_ETHERNET /* don't build if not configured for use in lwipopts.h */
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#include "lwip/pbuf.h"
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#include "lwip/ip_addr.h"
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#include "lwip/netif.h"
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#include "lwip/ip.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef ETHARP_HWADDR_LEN
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#define ETHARP_HWADDR_LEN 6
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#endif
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/bpstruct.h"
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#endif
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PACK_STRUCT_BEGIN
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struct eth_addr {
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PACK_STRUCT_FIELD(u8_t addr[ETHARP_HWADDR_LEN]);
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} PACK_STRUCT_STRUCT;
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PACK_STRUCT_END
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/epstruct.h"
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#endif
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/bpstruct.h"
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#endif
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PACK_STRUCT_BEGIN
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/* Ethernet header */
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struct eth_hdr {
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#if ETH_PAD_SIZE
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PACK_STRUCT_FIELD(u8_t padding[ETH_PAD_SIZE]);
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#endif
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PACK_STRUCT_FIELD(struct eth_addr dest);
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PACK_STRUCT_FIELD(struct eth_addr src);
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PACK_STRUCT_FIELD(u16_t type);
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} PACK_STRUCT_STRUCT;
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PACK_STRUCT_END
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/epstruct.h"
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#endif
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#define SIZEOF_ETH_HDR (14 + ETH_PAD_SIZE)
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#if ETHARP_SUPPORT_VLAN
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/bpstruct.h"
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#endif
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PACK_STRUCT_BEGIN
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/* VLAN header inserted between ethernet header and payload
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* if 'type' in ethernet header is ETHTYPE_VLAN.
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* See IEEE802.Q */
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struct eth_vlan_hdr {
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PACK_STRUCT_FIELD(u16_t tpid);
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PACK_STRUCT_FIELD(u16_t prio_vid);
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} PACK_STRUCT_STRUCT;
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PACK_STRUCT_END
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/epstruct.h"
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#endif
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#define SIZEOF_VLAN_HDR 4
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#define VLAN_ID(vlan_hdr) (htons((vlan_hdr)->prio_vid) & 0xFFF)
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#endif /* ETHARP_SUPPORT_VLAN */
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/bpstruct.h"
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#endif
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PACK_STRUCT_BEGIN
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/* the ARP message, see RFC 826 ("Packet format") */
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struct etharp_hdr {
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PACK_STRUCT_FIELD(u16_t hwtype);
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PACK_STRUCT_FIELD(u16_t proto);
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PACK_STRUCT_FIELD(u8_t hwlen);
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PACK_STRUCT_FIELD(u8_t protolen);
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PACK_STRUCT_FIELD(u16_t opcode);
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PACK_STRUCT_FIELD(struct eth_addr shwaddr);
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PACK_STRUCT_FIELD(struct ip_addr2 sipaddr);
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PACK_STRUCT_FIELD(struct eth_addr dhwaddr);
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PACK_STRUCT_FIELD(struct ip_addr2 dipaddr);
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} PACK_STRUCT_STRUCT;
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PACK_STRUCT_END
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/epstruct.h"
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#endif
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#define SIZEOF_ETHARP_HDR 28
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#define SIZEOF_ETHARP_PACKET (SIZEOF_ETH_HDR + SIZEOF_ETHARP_HDR)
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/* 5 seconds period */
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#define ARP_TMR_INTERVAL 5000
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#define ETHTYPE_ARP 0x0806
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#define ETHTYPE_IP 0x0800
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#define ETHTYPE_VLAN 0x8100
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#define ETHTYPE_PPPOEDISC 0x8863 /* PPP Over Ethernet Discovery Stage */
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#define ETHTYPE_PPPOE 0x8864 /* PPP Over Ethernet Session Stage */
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/* MEMCPY-like macro to copy to/from struct eth_addr's that are local variables
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* or known to be 32-bit aligned within the protocol header. */
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#ifndef ETHADDR32_COPY
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#define ETHADDR32_COPY(src, dst) SMEMCPY(src, dst, ETHARP_HWADDR_LEN)
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#endif
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/* MEMCPY-like macro to copy to/from struct eth_addr's that are no local
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* variables and known to be 16-bit aligned within the protocol header. */
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#ifndef ETHADDR16_COPY
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#define ETHADDR16_COPY(src, dst) SMEMCPY(src, dst, ETHARP_HWADDR_LEN)
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#endif
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#if LWIP_ARP /* don't build if not configured for use in lwipopts.h */
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/* ARP message types (opcodes) */
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#define ARP_REQUEST 1
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#define ARP_REPLY 2
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/* Define this to 1 and define LWIP_ARP_FILTER_NETIF_FN(pbuf, netif, type)
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* to a filter function that returns the correct netif when using multiple
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* netifs on one hardware interface where the netif's low-level receive
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* routine cannot decide for the correct netif (e.g. when mapping multiple
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* IP addresses to one hardware interface).
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*/
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#ifndef LWIP_ARP_FILTER_NETIF
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#define LWIP_ARP_FILTER_NETIF 0
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#endif
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#if ARP_QUEUEING
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/* struct for queueing outgoing packets for unknown address
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* defined here to be accessed by memp.h
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*/
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struct etharp_q_entry {
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struct etharp_q_entry *next;
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struct pbuf *p;
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};
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#endif /* ARP_QUEUEING */
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#define etharp_init() /* Compatibility define, not init needed. */
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void etharp_tmr(void);
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s8_t etharp_find_addr(struct netif *netif, ip_addr_t *ipaddr,
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struct eth_addr **eth_ret, ip_addr_t **ip_ret);
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err_t etharp_output(struct netif *netif, struct pbuf *q, ip_addr_t *ipaddr);
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err_t etharp_query(struct netif *netif, ip_addr_t *ipaddr, struct pbuf *q);
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err_t etharp_request(struct netif *netif, ip_addr_t *ipaddr);
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188
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/* For Ethernet network interfaces, we might want to send "gratuitous ARP";
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189
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* this is an ARP packet sent by a node in order to spontaneously cause other
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190
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* nodes to update an entry in their ARP cache.
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* From RFC 3220 "IP Mobility Support for IPv4" section 4.6. */
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#define etharp_gratuitous(netif) etharp_request((netif), &(netif)->ip_addr)
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193
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194
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#if ETHARP_SUPPORT_STATIC_ENTRIES
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195
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err_t etharp_add_static_entry(ip_addr_t *ipaddr, struct eth_addr *ethaddr);
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196
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err_t etharp_remove_static_entry(ip_addr_t *ipaddr);
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197
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#endif /* ETHARP_SUPPORT_STATIC_ENTRIES */
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198
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199
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#if LWIP_AUTOIP
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200
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err_t etharp_raw(struct netif *netif, const struct eth_addr *ethsrc_addr,
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201
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const struct eth_addr *ethdst_addr,
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const struct eth_addr *hwsrc_addr, const ip_addr_t *ipsrc_addr,
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203
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const struct eth_addr *hwdst_addr, const ip_addr_t *ipdst_addr,
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204
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const u16_t opcode);
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205
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#endif /* LWIP_AUTOIP */
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206
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207
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#endif /* LWIP_ARP */
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208
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err_t ethernet_input(struct pbuf *p, struct netif *netif);
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210
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#define eth_addr_cmp(addr1, addr2) (memcmp((addr1)->addr, (addr2)->addr, ETHARP_HWADDR_LEN) == 0)
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212
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extern const struct eth_addr ethbroadcast, ethzero;
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214
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#ifdef __cplusplus
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}
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#endif
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218
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#endif /* LWIP_ARP || LWIP_ETHERNET */
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220
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#endif /* __NETIF_ARP_H__ */
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