BadVPN – Blame information for rev 1
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1 | office | 1 | /** |
2 | * @file |
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3 | * |
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4 | * Neighbor discovery and stateless address autoconfiguration for IPv6. |
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5 | * Aims to be compliant with RFC 4861 (Neighbor discovery) and RFC 4862 |
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6 | * (Address autoconfiguration). |
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7 | */ |
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8 | |||
9 | /* |
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10 | * Copyright (c) 2010 Inico Technologies Ltd. |
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11 | * All rights reserved. |
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12 | * |
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13 | * Redistribution and use in source and binary forms, with or without modification, |
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14 | * are permitted provided that the following conditions are met: |
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15 | * |
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16 | * 1. Redistributions of source code must retain the above copyright notice, |
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17 | * this list of conditions and the following disclaimer. |
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18 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
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19 | * this list of conditions and the following disclaimer in the documentation |
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20 | * and/or other materials provided with the distribution. |
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21 | * 3. The name of the author may not be used to endorse or promote products |
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22 | * derived from this software without specific prior written permission. |
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23 | * |
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24 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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25 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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26 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
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27 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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28 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
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29 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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30 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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31 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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32 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
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33 | * OF SUCH DAMAGE. |
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34 | * |
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35 | * This file is part of the lwIP TCP/IP stack. |
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36 | * |
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37 | * Author: Ivan Delamer <delamer@inicotech.com> |
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38 | * |
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39 | * |
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40 | * Please coordinate changes and requests with Ivan Delamer |
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41 | * <delamer@inicotech.com> |
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42 | */ |
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43 | |||
44 | #ifndef LWIP_HDR_ND6_PRIV_H |
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45 | #define LWIP_HDR_ND6_PRIV_H |
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46 | |||
47 | #include "lwip/opt.h" |
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48 | |||
49 | #if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */ |
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50 | |||
51 | #include "lwip/pbuf.h" |
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52 | #include "lwip/ip6_addr.h" |
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53 | #include "lwip/netif.h" |
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54 | |||
55 | |||
56 | #ifdef __cplusplus |
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57 | extern "C" { |
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58 | #endif |
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59 | |||
60 | #if LWIP_ND6_QUEUEING |
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61 | /** struct for queueing outgoing packets for unknown address |
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62 | * defined here to be accessed by memp.h |
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63 | */ |
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64 | struct nd6_q_entry { |
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65 | struct nd6_q_entry *next; |
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66 | struct pbuf *p; |
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67 | }; |
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68 | #endif /* LWIP_ND6_QUEUEING */ |
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69 | |||
70 | /** Struct for tables. */ |
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71 | struct nd6_neighbor_cache_entry { |
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72 | ip6_addr_t next_hop_address; |
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73 | struct netif *netif; |
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74 | u8_t lladdr[NETIF_MAX_HWADDR_LEN]; |
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75 | /*u32_t pmtu;*/ |
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76 | #if LWIP_ND6_QUEUEING |
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77 | /** Pointer to queue of pending outgoing packets on this entry. */ |
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78 | struct nd6_q_entry *q; |
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79 | #else /* LWIP_ND6_QUEUEING */ |
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80 | /** Pointer to a single pending outgoing packet on this entry. */ |
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81 | struct pbuf *q; |
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82 | #endif /* LWIP_ND6_QUEUEING */ |
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83 | u8_t state; |
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84 | u8_t isrouter; |
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85 | union { |
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86 | u32_t reachable_time; /* in seconds */ |
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87 | u32_t delay_time; /* ticks (ND6_TMR_INTERVAL) */ |
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88 | u32_t probes_sent; |
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89 | u32_t stale_time; /* ticks (ND6_TMR_INTERVAL) */ |
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90 | } counter; |
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91 | }; |
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92 | |||
93 | struct nd6_destination_cache_entry { |
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94 | ip6_addr_t destination_addr; |
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95 | ip6_addr_t next_hop_addr; |
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96 | u16_t pmtu; |
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97 | u32_t age; |
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98 | }; |
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99 | |||
100 | struct nd6_prefix_list_entry { |
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101 | ip6_addr_t prefix; |
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102 | struct netif *netif; |
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103 | u32_t invalidation_timer; /* in seconds */ |
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104 | }; |
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105 | |||
106 | struct nd6_router_list_entry { |
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107 | struct nd6_neighbor_cache_entry *neighbor_entry; |
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108 | u32_t invalidation_timer; /* in seconds */ |
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109 | u8_t flags; |
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110 | }; |
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111 | |||
112 | enum nd6_neighbor_cache_entry_state { |
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113 | ND6_NO_ENTRY = 0, |
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114 | ND6_INCOMPLETE, |
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115 | ND6_REACHABLE, |
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116 | ND6_STALE, |
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117 | ND6_DELAY, |
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118 | ND6_PROBE |
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119 | }; |
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120 | |||
121 | #define ND6_HOPLIM 255 /* maximum hop limit, required in all ND packets */ |
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122 | |||
123 | #define ND6_2HRS 7200 /* two hours, expressed in number of seconds */ |
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124 | |||
125 | /* Router tables. */ |
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126 | /* @todo make these static? and entries accessible through API? */ |
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127 | extern struct nd6_neighbor_cache_entry neighbor_cache[]; |
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128 | extern struct nd6_destination_cache_entry destination_cache[]; |
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129 | extern struct nd6_prefix_list_entry prefix_list[]; |
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130 | extern struct nd6_router_list_entry default_router_list[]; |
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131 | |||
132 | /* Default values, can be updated by a RA message. */ |
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133 | extern u32_t reachable_time; |
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134 | extern u32_t retrans_timer; |
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135 | |||
136 | #ifdef __cplusplus |
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137 | } |
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138 | #endif |
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139 | |||
140 | #endif /* LWIP_IPV6 */ |
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141 | |||
142 | #endif /* LWIP_HDR_ND6_PRIV_H */ |