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