text: /**
   * @file
   * AutoIP protocol definitions
   */
  
  /*
   *
   * 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_PROT_AUTOIP_H
  #define LWIP_HDR_PROT_AUTOIP_H
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /* 169.254.0.0 */
  #define AUTOIP_NET              0xA9FE0000
  /* 169.254.1.0 */
  #define AUTOIP_RANGE_START      (AUTOIP_NET | 0x0100)
  /* 169.254.254.255 */
  #define AUTOIP_RANGE_END        (AUTOIP_NET | 0xFEFF)
  
  /* RFC 3927 Constants */
  #define PROBE_WAIT              1   /* second   (initial random delay)                 */
  #define PROBE_MIN               1   /* second   (minimum delay till repeated probe)    */
  #define PROBE_MAX               2   /* seconds  (maximum delay till repeated probe)    */
  #define PROBE_NUM               3   /*          (number of probe packets)              */
  #define ANNOUNCE_NUM            2   /*          (number of announcement packets)       */
  #define ANNOUNCE_INTERVAL       2   /* seconds  (time between announcement packets)    */
  #define ANNOUNCE_WAIT           2   /* seconds  (delay before announcing)              */
  
  #define MAX_CONFLICTS           LWIP_AUTOIP_MAX_CONFLICTS  /*          (max conflicts before rate limiting)   */
  #define RATE_LIMIT_INTERVAL     LWIP_AUTOIP_RATE_LIMIT_INTERVAL  /* seconds  (delay between successive attempts)    */
  
  #define DEFEND_INTERVAL         10  /* seconds  (min. wait between defensive ARPs)     */
  
  /* AutoIP client states */
  typedef enum {
    AUTOIP_STATE_OFF        = 0,
    AUTOIP_STATE_PROBING    = 1,
    AUTOIP_STATE_ANNOUNCING = 2,
    AUTOIP_STATE_BOUND      = 3
  } autoip_state_enum_t;
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* LWIP_HDR_PROT_AUTOIP_H */
  