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prot/autoip.h
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1 /**
2  * @file
3  * AutoIP protocol definitions
4  */
5 
6 /*
7  *
8  * Copyright (c) 2007 Dominik Spies <kontakt@dspies.de>
9  * All rights reserved.
10  *
11  * Redistribution and use in source and binary forms, with or without modification,
12  * are permitted provided that the following conditions are met:
13  *
14  * 1. Redistributions of source code must retain the above copyright notice,
15  * this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright notice,
17  * this list of conditions and the following disclaimer in the documentation
18  * and/or other materials provided with the distribution.
19  * 3. The name of the author may not be used to endorse or promote products
20  * derived from this software without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
23  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
25  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
27  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
30  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
31  * OF SUCH DAMAGE.
32  *
33  * Author: Dominik Spies <kontakt@dspies.de>
34  *
35  * This is a AutoIP implementation for the lwIP TCP/IP stack. It aims to conform
36  * with RFC 3927.
37  *
38  */
39 
40 #ifndef LWIP_HDR_PROT_AUTOIP_H
41 #define LWIP_HDR_PROT_AUTOIP_H
42 
43 #ifdef __cplusplus
44 extern "C" {
45 #endif
46 
47 /* 169.254.0.0 */
48 #define AUTOIP_NET 0xA9FE0000
49 /* 169.254.1.0 */
50 #define AUTOIP_RANGE_START (AUTOIP_NET | 0x0100)
51 /* 169.254.254.255 */
52 #define AUTOIP_RANGE_END (AUTOIP_NET | 0xFEFF)
53 
54 /* RFC 3927 Constants */
55 #define PROBE_WAIT 1 /* second (initial random delay) */
56 #define PROBE_MIN 1 /* second (minimum delay till repeated probe) */
57 #define PROBE_MAX 2 /* seconds (maximum delay till repeated probe) */
58 #define PROBE_NUM 3 /* (number of probe packets) */
59 #define ANNOUNCE_NUM 2 /* (number of announcement packets) */
60 #define ANNOUNCE_INTERVAL 2 /* seconds (time between announcement packets) */
61 #define ANNOUNCE_WAIT 2 /* seconds (delay before announcing) */
62 #define MAX_CONFLICTS 10 /* (max conflicts before rate limiting) */
63 #define RATE_LIMIT_INTERVAL 60 /* seconds (delay between successive attempts) */
64 #define DEFEND_INTERVAL 10 /* seconds (min. wait between defensive ARPs) */
65 
66 /* AutoIP client states */
67 typedef enum {
68  AUTOIP_STATE_OFF = 0,
69  AUTOIP_STATE_PROBING = 1,
70  AUTOIP_STATE_ANNOUNCING = 2,
71  AUTOIP_STATE_BOUND = 3
72 } autoip_state_enum_t;
73 
74 #ifdef __cplusplus
75 }
76 #endif
77 
78 #endif /* LWIP_HDR_PROT_AUTOIP_H */
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