1 /** 2 * @file 3 * 4 * IPv6 static route table. 5 */ 6 7 /* 8 * Copyright (c) 2015 Nest Labs, Inc. 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: Pradip De <pradipd@google.com> 34 * 35 * 36 * Please coordinate changes and requests with Pradip De 37 * <pradipd@google.com> 38 */ 39 40 #ifndef __LWIP_IP6_ROUTE_TABLE_H__ 41 #define __LWIP_IP6_ROUTE_TABLE_H__ 42 43 #include "lwip/opt.h" 44 45 #if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */ 46 47 #include "lwip/ip6_addr.h" 48 #include "lwip/err.h" 49 50 #ifdef __cplusplus 51 extern "C" { 52 #endif 53 54 struct netif; 55 56 /** 57 * LWIP_IPV6_NUM_ROUTES: Number of IPV6 routes that can be kept in the static route table. 58 */ 59 #ifndef LWIP_IPV6_NUM_ROUTE_ENTRIES 60 #define LWIP_IPV6_NUM_ROUTE_ENTRIES (8) 61 #endif 62 63 #define IP6_MAX_PREFIX_LEN (128) 64 #define IP6_PREFIX_ALLOWED_GRANULARITY (8) 65 /* Prefix length cannot be greater than 128 bits and needs to be at a byte boundary */ 66 #define ip6_prefix_valid(prefix_len) (((prefix_len) <= IP6_MAX_PREFIX_LEN) && \ 67 (((prefix_len) % IP6_PREFIX_ALLOWED_GRANULARITY) == 0)) 68 69 struct ip6_prefix { 70 ip6_addr_t addr; 71 u8_t prefix_len; /* prefix length in bits at byte boundaries */ 72 }; 73 74 struct ip6_route_entry { 75 struct ip6_prefix prefix; 76 struct netif *netif; 77 const ip6_addr_t *gateway; 78 }; 79 80 err_t ip6_add_route_entry(const struct ip6_prefix *ip6_prefix, struct netif *netif, 81 const ip6_addr_t *gateway, s8_t *idx); 82 void ip6_remove_route_entry(const struct ip6_prefix *ip6_prefix); 83 s8_t ip6_find_route_entry(const ip6_addr_t *ip6_dest_addr); 84 struct netif *ip6_static_route(const ip6_addr_t *src, const ip6_addr_t *dest); 85 const ip6_addr_t *ip6_get_gateway(struct netif *netif, const ip6_addr_t *dest); 86 const struct ip6_route_entry *ip6_get_route_table(void); 87 88 #ifdef __cplusplus 89 } 90 #endif 91 92 #endif /* LWIP_IPV6 */ 93 94 #endif /* __LWIP_IP6_ROUTE_TABLE_H__ */ 95