ReactOS  0.4.15-dev-5112-g22d8c0f
autoip.h
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1 
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
56 extern "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 
81 struct 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 
95 void autoip_set_struct(struct netif *netif, struct autoip *autoip);
96 
98 err_t autoip_start(struct netif *netif);
99 
101 err_t autoip_stop(struct netif *netif);
102 
104 void autoip_arp_reply(struct netif *netif, struct etharp_hdr *hdr);
105 
107 void autoip_tmr(void);
108 
110 void autoip_network_changed(struct netif *netif);
111 
112 #ifdef __cplusplus
113 }
114 #endif
115 
116 #endif /* LWIP_AUTOIP */
117 
118 #endif /* __LWIP_AUTOIP_H__ */
char hdr[14]
Definition: iptest.cpp:33
typedefPACK_STRUCT_END struct ip_addr ip_addr_t
Definition: ip_addr.h:64
s8_t err_t
Definition: err.h:47
Definition: netif.h:136
static int state
Definition: maze.c:121
unsigned char u8_t
Definition: cc.h:23
unsigned short u16_t
Definition: cc.h:24