23e67efbbd
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@443 42af7a65-404d-4744-a932-0658087f49c3
106 lines
4.0 KiB
C
106 lines
4.0 KiB
C
/* uip-arp.h
|
|
* Macros and definitions for the ARP module.
|
|
* Author: Adam Dunkels <adam@dunkels.com>
|
|
*
|
|
* Copyright (c) 2001-2003, Adam Dunkels.
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
#ifndef __UIP_ARP_H__
|
|
#define __UIP_ARP_H__
|
|
|
|
#include <sys/types.h>
|
|
#include <nuttx/compiler.h>
|
|
#include <net/ethernet.h>
|
|
#include <net/uip/uip.h>
|
|
|
|
/* The Ethernet header -- 14 bytes. The first two fields are type 'struct
|
|
* ether_addr but are represented as a simple byte array here because
|
|
* some compilers refuse to pack 6 byte structures.
|
|
*/
|
|
|
|
struct uip_eth_hdr
|
|
{
|
|
uint8 dest[6]; /* Ethernet destination address (6 bytes) */
|
|
uint8 src[6]; /* Ethernet source address (6 bytes) */
|
|
uint16 type; /* Type code (2 bytes) */
|
|
};
|
|
|
|
/* Recognized values of the type bytes in the Ethernet header */
|
|
|
|
#define UIP_ETHTYPE_ARP 0x0806
|
|
#define UIP_ETHTYPE_IP 0x0800
|
|
#define UIP_ETHTYPE_IP6 0x86dd
|
|
|
|
/* The uip_arp_init() function must be called before any of the other
|
|
* ARP functions.
|
|
*/
|
|
|
|
void uip_arp_init(void);
|
|
|
|
/* The uip_arp_ipin() function should be called whenever an IP packet
|
|
* arrives from the Ethernet. This function refreshes the ARP table or
|
|
* inserts a new mapping if none exists. The function assumes that an
|
|
* IP packet with an Ethernet header is present in the d_buf buffer
|
|
* and that the length of the packet is in the d_len field.
|
|
*/
|
|
|
|
#define uip_arp_ipin()
|
|
|
|
/* The uip_arp_arpin() should be called when an ARP packet is received
|
|
* by the Ethernet driver. This function also assumes that the
|
|
* Ethernet frame is present in the d_buf buffer. When the
|
|
* uip_arp_arpin() function returns, the contents of the d_buf
|
|
* buffer should be sent out on the Ethernet if the d_len field
|
|
* is > 0.
|
|
*/
|
|
|
|
void uip_arp_arpin(struct uip_driver_s *dev);
|
|
|
|
/* The uip_arp_out() function should be called when an IP packet
|
|
* should be sent out on the Ethernet. This function creates an
|
|
* Ethernet header before the IP header in the d_buf buffer. The
|
|
* Ethernet header will have the correct Ethernet MAC destination
|
|
* address filled in if an ARP table entry for the destination IP
|
|
* address (or the IP address of the default router) is present. If no
|
|
* such table entry is found, the IP packet is overwritten with an ARP
|
|
* request and we rely on TCP to retransmit the packet that was
|
|
* overwritten. In any case, the d_len field holds the length of
|
|
* the Ethernet frame that should be transmitted.
|
|
*/
|
|
|
|
void uip_arp_out(struct uip_driver_s *dev);
|
|
|
|
/* The uip_arp_timer() function should be called every ten seconds. It
|
|
* is responsible for flushing old entries in the ARP table.
|
|
*/
|
|
|
|
void uip_arp_timer(void);
|
|
|
|
#endif /* __UIP_ARP_H__ */
|