1*10465441SEvalZero /** 2*10465441SEvalZero * @file 3*10465441SEvalZero * 4*10465441SEvalZero * AutoIP Automatic LinkLocal IP Configuration 5*10465441SEvalZero */ 6*10465441SEvalZero 7*10465441SEvalZero /* 8*10465441SEvalZero * 9*10465441SEvalZero * Copyright (c) 2007 Dominik Spies <[email protected]> 10*10465441SEvalZero * All rights reserved. 11*10465441SEvalZero * 12*10465441SEvalZero * Redistribution and use in source and binary forms, with or without modification, 13*10465441SEvalZero * are permitted provided that the following conditions are met: 14*10465441SEvalZero * 15*10465441SEvalZero * 1. Redistributions of source code must retain the above copyright notice, 16*10465441SEvalZero * this list of conditions and the following disclaimer. 17*10465441SEvalZero * 2. Redistributions in binary form must reproduce the above copyright notice, 18*10465441SEvalZero * this list of conditions and the following disclaimer in the documentation 19*10465441SEvalZero * and/or other materials provided with the distribution. 20*10465441SEvalZero * 3. The name of the author may not be used to endorse or promote products 21*10465441SEvalZero * derived from this software without specific prior written permission. 22*10465441SEvalZero * 23*10465441SEvalZero * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 24*10465441SEvalZero * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25*10465441SEvalZero * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 26*10465441SEvalZero * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 27*10465441SEvalZero * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 28*10465441SEvalZero * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29*10465441SEvalZero * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30*10465441SEvalZero * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 31*10465441SEvalZero * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 32*10465441SEvalZero * OF SUCH DAMAGE. 33*10465441SEvalZero * 34*10465441SEvalZero * Author: Dominik Spies <[email protected]> 35*10465441SEvalZero * 36*10465441SEvalZero * This is a AutoIP implementation for the lwIP TCP/IP stack. It aims to conform 37*10465441SEvalZero * with RFC 3927. 38*10465441SEvalZero * 39*10465441SEvalZero */ 40*10465441SEvalZero 41*10465441SEvalZero #ifndef LWIP_HDR_AUTOIP_H 42*10465441SEvalZero #define LWIP_HDR_AUTOIP_H 43*10465441SEvalZero 44*10465441SEvalZero #include "lwip/opt.h" 45*10465441SEvalZero 46*10465441SEvalZero #if LWIP_IPV4 && LWIP_AUTOIP /* don't build if not configured for use in lwipopts.h */ 47*10465441SEvalZero 48*10465441SEvalZero #include "lwip/netif.h" 49*10465441SEvalZero /* #include "lwip/udp.h" */ 50*10465441SEvalZero #include "lwip/etharp.h" 51*10465441SEvalZero 52*10465441SEvalZero #ifdef __cplusplus 53*10465441SEvalZero extern "C" { 54*10465441SEvalZero #endif 55*10465441SEvalZero 56*10465441SEvalZero /** AutoIP Timing */ 57*10465441SEvalZero #define AUTOIP_TMR_INTERVAL 100 58*10465441SEvalZero #define AUTOIP_TICKS_PER_SECOND (1000 / AUTOIP_TMR_INTERVAL) 59*10465441SEvalZero 60*10465441SEvalZero /** AutoIP state information per netif */ 61*10465441SEvalZero struct autoip 62*10465441SEvalZero { 63*10465441SEvalZero /** the currently selected, probed, announced or used LL IP-Address */ 64*10465441SEvalZero ip4_addr_t llipaddr; 65*10465441SEvalZero /** current AutoIP state machine state */ 66*10465441SEvalZero u8_t state; 67*10465441SEvalZero /** sent number of probes or announces, dependent on state */ 68*10465441SEvalZero u8_t sent_num; 69*10465441SEvalZero /** ticks to wait, tick is AUTOIP_TMR_INTERVAL long */ 70*10465441SEvalZero u16_t ttw; 71*10465441SEvalZero /** ticks until a conflict can be solved by defending */ 72*10465441SEvalZero u8_t lastconflict; 73*10465441SEvalZero /** total number of probed/used Link Local IP-Addresses */ 74*10465441SEvalZero u8_t tried_llipaddr; 75*10465441SEvalZero }; 76*10465441SEvalZero 77*10465441SEvalZero 78*10465441SEvalZero void autoip_set_struct(struct netif *netif, struct autoip *autoip); 79*10465441SEvalZero /** Remove a struct autoip previously set to the netif using autoip_set_struct() */ 80*10465441SEvalZero #define autoip_remove_struct(netif) do { (netif)->autoip = NULL; } while (0) 81*10465441SEvalZero err_t autoip_start(struct netif *netif); 82*10465441SEvalZero err_t autoip_stop(struct netif *netif); 83*10465441SEvalZero void autoip_arp_reply(struct netif *netif, struct etharp_hdr *hdr); 84*10465441SEvalZero void autoip_tmr(void); 85*10465441SEvalZero void autoip_network_changed(struct netif *netif); 86*10465441SEvalZero u8_t autoip_supplied_address(const struct netif *netif); 87*10465441SEvalZero 88*10465441SEvalZero /* for lwIP internal use by ip4.c */ 89*10465441SEvalZero u8_t autoip_accept_packet(struct netif *netif, const ip4_addr_t *addr); 90*10465441SEvalZero 91*10465441SEvalZero #define netif_autoip_data(netif) ((struct autoip*)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_AUTOIP)) 92*10465441SEvalZero 93*10465441SEvalZero #ifdef __cplusplus 94*10465441SEvalZero } 95*10465441SEvalZero #endif 96*10465441SEvalZero 97*10465441SEvalZero #endif /* LWIP_IPV4 && LWIP_AUTOIP */ 98*10465441SEvalZero 99*10465441SEvalZero #endif /* LWIP_HDR_AUTOIP_H */ 100