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99 lines
3.4 KiB
99 lines
3.4 KiB
/**
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* @file
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*
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* AutoIP Automatic LinkLocal IP Configuration
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*/
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/*
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*
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* Copyright (c) 2007 Dominik Spies <kontakt@dspies.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* Author: Dominik Spies <kontakt@dspies.de>
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*
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* This is a AutoIP implementation for the lwIP TCP/IP stack. It aims to conform
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* with RFC 3927.
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*
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*/
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#ifndef LWIP_HDR_AUTOIP_H
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#define LWIP_HDR_AUTOIP_H
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#include "lwip/opt.h"
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#if LWIP_IPV4 && LWIP_AUTOIP /* don't build if not configured for use in lwipopts.h */
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#include "lwip/netif.h"
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/* #include "lwip/udp.h" */
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#include "lwip/etharp.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** AutoIP Timing */
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#define AUTOIP_TMR_INTERVAL 100
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#define AUTOIP_TICKS_PER_SECOND (1000 / AUTOIP_TMR_INTERVAL)
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/** AutoIP state information per netif */
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struct autoip
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{
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/** the currently selected, probed, announced or used LL IP-Address */
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ip4_addr_t llipaddr;
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/** current AutoIP state machine state */
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u8_t state;
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/** sent number of probes or announces, dependent on state */
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u8_t sent_num;
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/** ticks to wait, tick is AUTOIP_TMR_INTERVAL long */
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u16_t ttw;
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/** ticks until a conflict can be solved by defending */
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u8_t lastconflict;
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/** total number of probed/used Link Local IP-Addresses */
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u8_t tried_llipaddr;
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};
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void autoip_set_struct(struct netif *netif, struct autoip *autoip);
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/** Remove a struct autoip previously set to the netif using autoip_set_struct() */
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#define autoip_remove_struct(netif) do { (netif)->autoip = NULL; } while (0)
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err_t autoip_start(struct netif *netif);
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err_t autoip_stop(struct netif *netif);
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void autoip_arp_reply(struct netif *netif, struct etharp_hdr *hdr);
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void autoip_tmr(void);
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void autoip_network_changed(struct netif *netif);
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u8_t autoip_supplied_address(const struct netif *netif);
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/* for lwIP internal use by ip4.c */
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u8_t autoip_accept_packet(struct netif *netif, const ip4_addr_t *addr);
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#define netif_autoip_data(netif) ((struct autoip*)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_AUTOIP))
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#ifdef __cplusplus
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}
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#endif
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#endif /* LWIP_IPV4 && LWIP_AUTOIP */
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#endif /* LWIP_HDR_AUTOIP_H */
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