84 lines
3.5 KiB
C
84 lines
3.5 KiB
C
/*
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* Copyright (c) 2001-2003, Adam Dunkels.
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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
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation 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
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This file is part of the uIP TCP/IP stack.
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*
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* $Id: uip_arp.h,v 1.2 2006/08/26 23:58:45 oliverschmidt Exp $
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*
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*/
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#ifndef IP64_ARP_H
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#define IP64_ARP_H
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#include "net/ip/uip.h"
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#include "ip64-eth.h"
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/* The uip_arp_init() function must be called before any of the other
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ARP functions. */
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void ip64_arp_init(void);
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/* The uip_arp_ipin() function should be called whenever an IP packet
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arrives from the Ethernet. This function refreshes the ARP table or
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inserts a new mapping if none exists. The function assumes that an
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IP packet with an Ethernet header is present in the uip_buf buffer
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and that the length of the packet is in the uip_len variable. */
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void ip64_arp_ip_input(const uint8_t *packet, uint16_t packet_len);
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/* The uip_arp_arpin() should be called when an ARP packet is received
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by the Ethernet driver. This function also assumes that the
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Ethernet frame is present in the uip_buf buffer. When the
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uip_arp_arpin() function returns, the contents of the uip_buf
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buffer should be sent out on the Ethernet if the uip_len variable
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is > 0. */
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uint16_t ip64_arp_arp_input(const uint8_t *packet, uint16_t packet_len);
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/* The uip_arp_out() function should be called when an IP packet
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should be sent out on the Ethernet. This function creates an
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Ethernet header before the IP header in the uip_buf buffer. The
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Ethernet header will have the correct Ethernet MAC destination
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address filled in if an ARP table entry for the destination IP
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address (or the IP address of the default router) is present. If no
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such table entry is found, the IP packet is overwritten with an ARP
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request and we rely on TCP to retransmit the packet that was
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overwritten. In any case, the uip_len variable holds the length of
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the Ethernet frame that should be transmitted. */
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void ip64_arp_ip_output(uint8_t *packet, uint16_t packet_len);
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int ip64_arp_create_ethhdr(uint8_t *link_header,
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const uint8_t *network_header);
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int ip64_arp_create_arp_request(uint8_t *link_header,
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const uint8_t *network_header);
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int ip64_arp_check_cache(const uint8_t *nlhdr);
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#endif /* IP64_ARP_H */
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