1 | /**
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2 | * @file
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3 | *
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4 | * IPv6 static route table.
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5 | */
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6 |
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7 | /*
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8 | * Copyright (c) 2015 Nest Labs, Inc.
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9 | * All rights reserved.
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10 | *
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11 | * Redistribution and use in source and binary forms, with or without modification,
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12 | * are permitted provided that the following conditions are met:
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13 | *
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14 | * 1. Redistributions of source code must retain the above copyright notice,
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15 | * this list of conditions and the following disclaimer.
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16 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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17 | * this list of conditions and the following disclaimer in the documentation
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18 | * and/or other materials provided with the distribution.
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19 | * 3. The name of the author may not be used to endorse or promote products
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20 | * derived from this software without specific prior written permission.
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21 | *
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22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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23 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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24 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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25 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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26 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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27 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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30 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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31 | * OF SUCH DAMAGE.
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32 | *
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33 | * Author: Pradip De <pradipd@google.com>
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34 | *
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35 | *
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36 | * Please coordinate changes and requests with Pradip De
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37 | * <pradipd@google.com>
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38 | */
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39 |
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40 | #ifndef __LWIP_IP6_ROUTE_TABLE_H__
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41 | #define __LWIP_IP6_ROUTE_TABLE_H__
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42 |
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43 | #include "lwip/opt.h"
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44 |
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45 | #if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */
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46 |
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47 | #include "lwip/ip6_addr.h"
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48 | #include "lwip/err.h"
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49 |
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50 | #ifdef __cplusplus
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51 | extern "C" {
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52 | #endif
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53 |
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54 | struct netif;
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55 |
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56 | /**
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57 | * LWIP_IPV6_NUM_ROUTES: Number of IPV6 routes that can be kept in the static route table.
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58 | */
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59 | #ifndef LWIP_IPV6_NUM_ROUTE_ENTRIES
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60 | #define LWIP_IPV6_NUM_ROUTE_ENTRIES (8)
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61 | #endif
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62 |
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63 | #define IP6_MAX_PREFIX_LEN (128)
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64 | #define IP6_PREFIX_ALLOWED_GRANULARITY (8)
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65 | /* Prefix length cannot be greater than 128 bits and needs to be at a byte boundary */
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66 | #define ip6_prefix_valid(prefix_len) (((prefix_len) <= IP6_MAX_PREFIX_LEN) && \
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67 | (((prefix_len) % IP6_PREFIX_ALLOWED_GRANULARITY) == 0))
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68 |
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69 | struct ip6_prefix {
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70 | ip6_addr_t addr;
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71 | u8_t prefix_len; /* prefix length in bits at byte boundaries */
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72 | };
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73 |
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74 | struct ip6_route_entry {
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75 | struct ip6_prefix prefix;
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76 | struct netif *netif;
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77 | const ip6_addr_t *gateway;
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78 | };
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79 |
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80 | err_t ip6_add_route_entry(const struct ip6_prefix *ip6_prefix, struct netif *netif,
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81 | const ip6_addr_t *gateway, s8_t *idx);
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82 | void ip6_remove_route_entry(const struct ip6_prefix *ip6_prefix);
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83 | s8_t ip6_find_route_entry(const ip6_addr_t *ip6_dest_addr);
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84 | struct netif *ip6_static_route(const ip6_addr_t *src, const ip6_addr_t *dest);
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85 | const ip6_addr_t *ip6_get_gateway(struct netif *netif, const ip6_addr_t *dest);
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86 | const struct ip6_route_entry *ip6_get_route_table(void);
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87 |
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88 | #ifdef __cplusplus
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89 | }
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90 | #endif
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91 |
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92 | #endif /* LWIP_IPV6 */
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93 |
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94 | #endif /* __LWIP_IP6_ROUTE_TABLE_H__ */
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