text: /*
   * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
   * 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.
   *
   * This file is part of the lwIP TCP/IP stack.
   *
   * Author: Jani Monoses <jani@iv.ro>
   *
   */
  
  #ifndef LWIP_HDR_IP_FRAG_H
  #define LWIP_HDR_IP_FRAG_H
  
  #include "lwip/opt.h"
  #include "lwip/err.h"
  #include "lwip/pbuf.h"
  #include "lwip/netif.h"
  #include "lwip/ip_addr.h"
  #include "lwip/ip.h"
  
  #if LWIP_IPV4
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #if IP_REASSEMBLY
  /* The IP reassembly timer interval in milliseconds. */
  #define IP_TMR_INTERVAL 1000
  
  /* IP reassembly helper struct.
   * This is exported because memp needs to know the size.
   */
  struct ip_reassdata {
    struct ip_reassdata *next;
    struct pbuf *p;
    struct ip_hdr iphdr;
    u16_t datagram_len;
    u8_t flags;
    u8_t timer;
  };
  
  void ip_reass_init(void);
  void ip_reass_tmr(void);
  struct pbuf * ip4_reass(struct pbuf *p);
  #endif /* IP_REASSEMBLY */
  
  #if IP_FRAG
  #if !IP_FRAG_USES_STATIC_BUF && !LWIP_NETIF_TX_SINGLE_PBUF
  /** A custom pbuf that holds a reference to another pbuf, which is freed
   * when this custom pbuf is freed. This is used to create a custom PBUF_REF
   * that points into the original pbuf. */
  #ifndef LWIP_PBUF_CUSTOM_REF_DEFINED
  #define LWIP_PBUF_CUSTOM_REF_DEFINED
  struct pbuf_custom_ref {
    /** 'base class' */
    struct pbuf_custom pc;
    /** pointer to the original pbuf that is referenced */
    struct pbuf *original;
  };
  #endif /* LWIP_PBUF_CUSTOM_REF_DEFINED */
  #endif /* !IP_FRAG_USES_STATIC_BUF && !LWIP_NETIF_TX_SINGLE_PBUF */
  
  err_t ip4_frag(struct pbuf *p, struct netif *netif, const ip4_addr_t *dest);
  #endif /* IP_FRAG */
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* LWIP_IPV4 */
  
  #endif /* LWIP_HDR_IP_FRAG_H */
  
  
  