Marco Zecchini
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Example_RTOS
Rtos API example
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autoip.h
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00001 /** 00002 * @file 00003 * 00004 * AutoIP Automatic LinkLocal IP Configuration 00005 */ 00006 00007 /* 00008 * 00009 * Copyright (c) 2007 Dominik Spies <kontakt@dspies.de> 00010 * All rights reserved. 00011 * 00012 * Redistribution and use in source and binary forms, with or without modification, 00013 * are permitted provided that the following conditions are met: 00014 * 00015 * 1. Redistributions of source code must retain the above copyright notice, 00016 * this list of conditions and the following disclaimer. 00017 * 2. Redistributions in binary form must reproduce the above copyright notice, 00018 * this list of conditions and the following disclaimer in the documentation 00019 * and/or other materials provided with the distribution. 00020 * 3. The name of the author may not be used to endorse or promote products 00021 * derived from this software without specific prior written permission. 00022 * 00023 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 00024 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00025 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 00026 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00027 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 00028 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00029 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00030 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 00031 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 00032 * OF SUCH DAMAGE. 00033 * 00034 * Author: Dominik Spies <kontakt@dspies.de> 00035 * 00036 * This is a AutoIP implementation for the lwIP TCP/IP stack. It aims to conform 00037 * with RFC 3927. 00038 * 00039 */ 00040 00041 #ifndef LWIP_HDR_AUTOIP_H 00042 #define LWIP_HDR_AUTOIP_H 00043 00044 #include "lwip/opt.h" 00045 00046 #if LWIP_IPV4 && LWIP_AUTOIP /* don't build if not configured for use in lwipopts.h */ 00047 00048 #include "lwip/netif.h" 00049 /* #include "lwip/udp.h" */ 00050 #include "lwip/etharp.h" 00051 00052 #ifdef __cplusplus 00053 extern "C" { 00054 #endif 00055 00056 /** AutoIP Timing */ 00057 #define AUTOIP_TMR_INTERVAL 100 00058 #define AUTOIP_TICKS_PER_SECOND (1000 / AUTOIP_TMR_INTERVAL) 00059 00060 /** AutoIP state information per netif */ 00061 struct autoip 00062 { 00063 /** the currently selected, probed, announced or used LL IP-Address */ 00064 ip4_addr_t llipaddr; 00065 /** current AutoIP state machine state */ 00066 u8_t state; 00067 /** sent number of probes or announces, dependent on state */ 00068 u8_t sent_num; 00069 /** ticks to wait, tick is AUTOIP_TMR_INTERVAL long */ 00070 u16_t ttw; 00071 /** ticks until a conflict can be solved by defending */ 00072 u8_t lastconflict; 00073 /** total number of probed/used Link Local IP-Addresses */ 00074 u8_t tried_llipaddr; 00075 }; 00076 00077 00078 void autoip_set_struct(struct netif *netif, struct autoip *autoip); 00079 /** Remove a struct autoip previously set to the netif using autoip_set_struct() */ 00080 #define autoip_remove_struct(netif) do { (netif)->autoip = NULL; } while (0) 00081 err_t autoip_start(struct netif *netif); 00082 err_t autoip_stop(struct netif *netif); 00083 void autoip_arp_reply(struct netif *netif, struct etharp_hdr *hdr); 00084 void autoip_tmr(void); 00085 void autoip_network_changed(struct netif *netif); 00086 u8_t autoip_supplied_address(const struct netif *netif); 00087 00088 /* for lwIP internal use by ip4.c */ 00089 u8_t autoip_accept_packet(struct netif *netif, const ip4_addr_t *addr); 00090 00091 #define netif_autoip_data(netif) ((struct autoip*)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_AUTOIP)) 00092 00093 #ifdef __cplusplus 00094 } 00095 #endif 00096 00097 #endif /* LWIP_IPV4 && LWIP_AUTOIP */ 00098 00099 #endif /* LWIP_HDR_AUTOIP_H */
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