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      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 (at) 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__ */
     89