1/** 2 * @file 3 * 4 * Neighbor discovery and stateless address autoconfiguration for IPv6. 5 * Aims to be compliant with RFC 4861 (Neighbor discovery) and RFC 4862 6 * (Address autoconfiguration). 7 */ 8 9/* 10 * Copyright (c) 2010 Inico Technologies Ltd. 11 * All rights reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without modification, 14 * are permitted provided that the following conditions are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright notice, 17 * this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright notice, 19 * this list of conditions and the following disclaimer in the documentation 20 * and/or other materials provided with the distribution. 21 * 3. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 27 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 29 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 32 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 33 * OF SUCH DAMAGE. 34 * 35 * This file is part of the lwIP TCP/IP stack. 36 * 37 * Author: Ivan Delamer <delamer@inicotech.com> 38 * 39 * 40 * Please coordinate changes and requests with Ivan Delamer 41 * <delamer@inicotech.com> 42 */ 43 44#ifndef LWIP_HDR_ND6_PRIV_H 45#define LWIP_HDR_ND6_PRIV_H 46 47#include "lwip/opt.h" 48 49#if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */ 50 51#include "lwip/pbuf.h" 52#include "lwip/ip6_addr.h" 53#include "lwip/netif.h" 54 55 56#ifdef __cplusplus 57extern "C" { 58#endif 59 60#if LWIP_ND6_QUEUEING 61/** struct for queueing outgoing packets for unknown address 62 * defined here to be accessed by memp.h 63 */ 64struct nd6_q_entry { 65 struct nd6_q_entry *next; 66 struct pbuf *p; 67}; 68#endif /* LWIP_ND6_QUEUEING */ 69 70/** Struct for tables. */ 71struct nd6_neighbor_cache_entry { 72 ip6_addr_t next_hop_address; 73 struct netif *netif; 74 u8_t lladdr[NETIF_MAX_HWADDR_LEN]; 75 /*u32_t pmtu;*/ 76#if LWIP_ND6_QUEUEING 77 /** Pointer to queue of pending outgoing packets on this entry. */ 78 struct nd6_q_entry *q; 79#else /* LWIP_ND6_QUEUEING */ 80 /** Pointer to a single pending outgoing packet on this entry. */ 81 struct pbuf *q; 82#endif /* LWIP_ND6_QUEUEING */ 83 u8_t state; 84 u8_t isrouter; 85 union { 86 u32_t reachable_time; /* in ms since value may originate from network packet */ 87 u32_t delay_time; /* ticks (ND6_TMR_INTERVAL) */ 88 u32_t probes_sent; 89 u32_t stale_time; /* ticks (ND6_TMR_INTERVAL) */ 90 } counter; 91}; 92 93struct nd6_destination_cache_entry { 94 ip6_addr_t destination_addr; 95 ip6_addr_t next_hop_addr; 96 u16_t pmtu; 97 u32_t age; 98}; 99 100struct nd6_prefix_list_entry { 101 ip6_addr_t prefix; 102 struct netif *netif; 103 u32_t invalidation_timer; /* in ms since value may originate from network packet */ 104#if LWIP_IPV6_AUTOCONFIG 105 u8_t flags; 106#define ND6_PREFIX_AUTOCONFIG_AUTONOMOUS 0x01 107#define ND6_PREFIX_AUTOCONFIG_ADDRESS_GENERATED 0x02 108#define ND6_PREFIX_AUTOCONFIG_ADDRESS_DUPLICATE 0x04 109#endif /* LWIP_IPV6_AUTOCONFIG */ 110}; 111 112struct nd6_router_list_entry { 113 struct nd6_neighbor_cache_entry *neighbor_entry; 114 u32_t invalidation_timer; /* in ms since value may originate from network packet */ 115 u8_t flags; 116}; 117 118enum nd6_neighbor_cache_entry_state { 119 ND6_NO_ENTRY = 0, 120 ND6_INCOMPLETE, 121 ND6_REACHABLE, 122 ND6_STALE, 123 ND6_DELAY, 124 ND6_PROBE 125}; 126 127/* Router tables. */ 128/* @todo make these static? and entries accessible through API? */ 129extern struct nd6_neighbor_cache_entry neighbor_cache[]; 130extern struct nd6_destination_cache_entry destination_cache[]; 131extern struct nd6_prefix_list_entry prefix_list[]; 132extern struct nd6_router_list_entry default_router_list[]; 133 134/* Default values, can be updated by a RA message. */ 135extern u32_t reachable_time; 136extern u32_t retrans_timer; 137 138#ifdef __cplusplus 139} 140#endif 141 142#endif /* LWIP_IPV6 */ 143 144#endif /* LWIP_HDR_ND6_PRIV_H */ 145