source: UsbWattMeter/trunk/lwip-1.4.1/src/include/ipv4/lwip/autoip.h@ 164

Last change on this file since 164 was 164, checked in by coas-nagasima, 6 years ago

TOPPERS/ECNLサンプルアプリ「USB充電器電力計」を追加

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File size: 4.5 KB
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1/**
2 * @file
3 *
4 * AutoIP Automatic LinkLocal IP Configuration
5 */
6
7/*
8 *
9 * Copyright (c) 2007 Dominik Spies <kontakt@dspies.de>
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without modification,
13 * are permitted provided that the following conditions are met:
14 *
15 * 1. Redistributions of source code must retain the above copyright notice,
16 * this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright notice,
18 * this list of conditions and the following disclaimer in the documentation
19 * and/or other materials provided with the distribution.
20 * 3. The name of the author may not be used to endorse or promote products
21 * derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
26 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
27 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
28 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
31 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
32 * OF SUCH DAMAGE.
33 *
34 * Author: Dominik Spies <kontakt@dspies.de>
35 *
36 * This is a AutoIP implementation for the lwIP TCP/IP stack. It aims to conform
37 * with RFC 3927.
38 *
39 *
40 * Please coordinate changes and requests with Dominik Spies
41 * <kontakt@dspies.de>
42 */
43
44#ifndef __LWIP_AUTOIP_H__
45#define __LWIP_AUTOIP_H__
46
47#include "lwip/opt.h"
48
49#if LWIP_AUTOIP /* don't build if not configured for use in lwipopts.h */
50
51#include "lwip/netif.h"
52#include "lwip/udp.h"
53#include "netif/etharp.h"
54
55#ifdef __cplusplus
56extern "C" {
57#endif
58
59/* AutoIP Timing */
60#define AUTOIP_TMR_INTERVAL 100
61#define AUTOIP_TICKS_PER_SECOND (1000 / AUTOIP_TMR_INTERVAL)
62
63/* RFC 3927 Constants */
64#define PROBE_WAIT 1 /* second (initial random delay) */
65#define PROBE_MIN 1 /* second (minimum delay till repeated probe) */
66#define PROBE_MAX 2 /* seconds (maximum delay till repeated probe) */
67#define PROBE_NUM 3 /* (number of probe packets) */
68#define ANNOUNCE_NUM 2 /* (number of announcement packets) */
69#define ANNOUNCE_INTERVAL 2 /* seconds (time between announcement packets) */
70#define ANNOUNCE_WAIT 2 /* seconds (delay before announcing) */
71#define MAX_CONFLICTS 10 /* (max conflicts before rate limiting) */
72#define RATE_LIMIT_INTERVAL 60 /* seconds (delay between successive attempts) */
73#define DEFEND_INTERVAL 10 /* seconds (min. wait between defensive ARPs) */
74
75/* AutoIP client states */
76#define AUTOIP_STATE_OFF 0
77#define AUTOIP_STATE_PROBING 1
78#define AUTOIP_STATE_ANNOUNCING 2
79#define AUTOIP_STATE_BOUND 3
80
81struct autoip
82{
83 ip_addr_t llipaddr; /* the currently selected, probed, announced or used LL IP-Address */
84 u8_t state; /* current AutoIP state machine state */
85 u8_t sent_num; /* sent number of probes or announces, dependent on state */
86 u16_t ttw; /* ticks to wait, tick is AUTOIP_TMR_INTERVAL long */
87 u8_t lastconflict; /* ticks until a conflict can be solved by defending */
88 u8_t tried_llipaddr; /* total number of probed/used Link Local IP-Addresses */
89};
90
91
92#define autoip_init() /* Compatibility define, no init needed. */
93
94/** Set a struct autoip allocated by the application to work with */
95void autoip_set_struct(struct netif *netif, struct autoip *autoip);
96
97/** Start AutoIP client */
98err_t autoip_start(struct netif *netif);
99
100/** Stop AutoIP client */
101err_t autoip_stop(struct netif *netif);
102
103/** Handles every incoming ARP Packet, called by etharp_arp_input */
104void autoip_arp_reply(struct netif *netif, struct etharp_hdr *hdr);
105
106/** Has to be called in loop every AUTOIP_TMR_INTERVAL milliseconds */
107void autoip_tmr(void);
108
109/** Handle a possible change in the network configuration */
110void autoip_network_changed(struct netif *netif);
111
112#ifdef __cplusplus
113}
114#endif
115
116#endif /* LWIP_AUTOIP */
117
118#endif /* __LWIP_AUTOIP_H__ */
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