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1/**
2 * \addtogroup uip
3 * @{
4 */
5
6/**
7 * \addtogroup uiparp
8 * @{
9 */
10
11/**
12 * \file
13 * Macros and definitions for the ARP module.
14 * \author Adam Dunkels <adam@dunkels.com>
15 */
16
17
18/*
19 * Copyright (c) 2001-2003, Adam Dunkels.
20 * All rights reserved.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the above copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. The name of the author may not be used to endorse or promote
31 * products derived from this software without specific prior
32 * written permission.
33 *
34 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
35 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
36 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
38 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
40 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
41 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
42 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
43 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
44 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
45 *
46 * This file is part of the uIP TCP/IP stack.
47 *
48 * $Id: uip_arp.h,v 1.2 2006/08/26 23:58:45 oliverschmidt Exp $
49 *
50 */
51
52#ifndef __UIP_ARP_H__
53#define __UIP_ARP_H__
54
55#include "uip.h"
56
57
58extern struct uip_eth_addr uip_ethaddr;
59
60/**
61 * The Ethernet header.
62 */
63struct uip_eth_hdr {
64 struct uip_eth_addr dest;
65 struct uip_eth_addr src;
66 u16_t type;
67};
68
69#define UIP_ETHTYPE_ARP 0x0806
70#define UIP_ETHTYPE_IP 0x0800
71#define UIP_ETHTYPE_IPV6 0x86dd
72
73
74/* The uip_arp_init() function must be called before any of the other
75 ARP functions. */
76void uip_arp_init(void);
77
78/* The uip_arp_ipin() function should be called whenever an IP packet
79 arrives from the Ethernet. This function refreshes the ARP table or
80 inserts a new mapping if none exists. The function assumes that an
81 IP packet with an Ethernet header is present in the uip_buf buffer
82 and that the length of the packet is in the uip_len variable. */
83/*void uip_arp_ipin(void);*/
84#define uip_arp_ipin()
85
86/* The uip_arp_arpin() should be called when an ARP packet is received
87 by the Ethernet driver. This function also assumes that the
88 Ethernet frame is present in the uip_buf buffer. When the
89 uip_arp_arpin() function returns, the contents of the uip_buf
90 buffer should be sent out on the Ethernet if the uip_len variable
91 is > 0. */
92void uip_arp_arpin(void);
93
94/* The uip_arp_out() function should be called when an IP packet
95 should be sent out on the Ethernet. This function creates an
96 Ethernet header before the IP header in the uip_buf buffer. The
97 Ethernet header will have the correct Ethernet MAC destination
98 address filled in if an ARP table entry for the destination IP
99 address (or the IP address of the default router) is present. If no
100 such table entry is found, the IP packet is overwritten with an ARP
101 request and we rely on TCP to retransmit the packet that was
102 overwritten. In any case, the uip_len variable holds the length of
103 the Ethernet frame that should be transmitted. */
104void uip_arp_out(void);
105
106/* The uip_arp_timer() function should be called every ten seconds. It
107 is responsible for flushing old entries in the ARP table. */
108void uip_arp_timer(void);
109
110/** @} */
111
112/**
113 * \addtogroup uipconffunc
114 * @{
115 */
116
117
118/**
119 * Specifiy the Ethernet MAC address.
120 *
121 * The ARP code needs to know the MAC address of the Ethernet card in
122 * order to be able to respond to ARP queries and to generate working
123 * Ethernet headers.
124 *
125 * \note This macro only specifies the Ethernet MAC address to the ARP
126 * code. It cannot be used to change the MAC address of the Ethernet
127 * card.
128 *
129 * \param eaddr A pointer to a struct uip_eth_addr containing the
130 * Ethernet MAC address of the Ethernet card.
131 *
132 * \hideinitializer
133 */
134#define uip_setethaddr(eaddr) do {uip_ethaddr.addr[0] = eaddr.addr[0]; \
135 uip_ethaddr.addr[1] = eaddr.addr[1];\
136 uip_ethaddr.addr[2] = eaddr.addr[2];\
137 uip_ethaddr.addr[3] = eaddr.addr[3];\
138 uip_ethaddr.addr[4] = eaddr.addr[4];\
139 uip_ethaddr.addr[5] = eaddr.addr[5];} while(0)
140
141/** @} */
142
143
144#endif /* __UIP_ARP_H__ */
145/** @} */
146
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