tmk_core/tool/mbed/mbed-sdk/libraries/net/lwip/lwip/include/ipv4/lwip/ip_frag.h

   1 /*
   2  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without modification,
   6  * are permitted provided that the following conditions are met:
   7  *
   8  * 1. Redistributions of source code must retain the above copyright notice,
   9  *    this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright notice,
  11  *    this list of conditions and the following disclaimer in the documentation
  12  *    and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
  19  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
  21  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  22  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  23  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  24  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
  25  * OF SUCH DAMAGE.
  26  *
  27  * This file is part of the lwIP TCP/IP stack.
  28  *
  29  * Author: Jani Monoses <jani@iv.ro>
  30  *
  31  */
  32
  33 #ifndef __LWIP_IP_FRAG_H__
  34 #define __LWIP_IP_FRAG_H__
  35
  36 #include "lwip/opt.h"
  37 #include "lwip/err.h"
  38 #include "lwip/pbuf.h"
  39 #include "lwip/netif.h"
  40 #include "lwip/ip_addr.h"
  41 #include "lwip/ip.h"
  42
  43 #ifdef __cplusplus
  44 extern "C" {
  45 #endif
  46
  47 #if IP_REASSEMBLY
  48 /* The IP reassembly timer interval in milliseconds. */
  49 #define IP_TMR_INTERVAL 1000
  50
  51 /* IP reassembly helper struct.
  52  * This is exported because memp needs to know the size.
  53  */
  54 struct ip_reassdata {
  55   struct ip_reassdata *next;
  56   struct pbuf *p;
  57   struct ip_hdr iphdr;
  58   u16_t datagram_len;
  59   u8_t flags;
  60   u8_t timer;
  61 };
  62
  63 void ip_reass_init(void);
  64 void ip_reass_tmr(void);
  65 struct pbuf * ip_reass(struct pbuf *p);
  66 #endif /* IP_REASSEMBLY */
  67
  68 #if IP_FRAG
  69 #if !IP_FRAG_USES_STATIC_BUF && !LWIP_NETIF_TX_SINGLE_PBUF
  70 /** A custom pbuf that holds a reference to another pbuf, which is freed
  71  * when this custom pbuf is freed. This is used to create a custom PBUF_REF
  72  * that points into the original pbuf. */
  73 struct pbuf_custom_ref {
  74   /** 'base class' */
  75   struct pbuf_custom pc;
  76   /** pointer to the original pbuf that is referenced */
  77   struct pbuf *original;
  78 };
  79 #endif /* !IP_FRAG_USES_STATIC_BUF && !LWIP_NETIF_TX_SINGLE_PBUF */
  80
  81 err_t ip_frag(struct pbuf *p, struct netif *netif, ip_addr_t *dest);
  82 #endif /* IP_FRAG */
  83
  84 #ifdef __cplusplus
  85 }
  86 #endif
  87
  88 #endif /* __LWIP_IP_FRAG_H__ */