ip_frag.h

00001 /*
00002  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
00003  * All rights reserved. 
00004  * 
00005  * Redistribution and use in source and binary forms, with or without modification, 
00006  * are permitted provided that the following conditions are met:
00007  *
00008  * 1. Redistributions of source code must retain the above copyright notice,
00009  *    this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above copyright notice,
00011  *    this list of conditions and the following disclaimer in the documentation
00012  *    and/or other materials provided with the distribution.
00013  * 3. The name of the author may not be used to endorse or promote products
00014  *    derived from this software without specific prior written permission. 
00015  *
00016  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
00017  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
00018  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
00019  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
00020  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
00021  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
00022  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
00023  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
00024  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
00025  * OF SUCH DAMAGE.
00026  *
00027  * This file is part of the lwIP TCP/IP stack.
00028  * 
00029  * Author: Jani Monoses <jani@iv.ro>
00030  *
00031  */
00032 
00033 #ifndef __LWIP_IP_FRAG_H__
00034 #define __LWIP_IP_FRAG_H__
00035 
00036 #include "lwip/opt.h"
00037 #include "lwip/err.h"
00038 #include "lwip/pbuf.h"
00039 #include "lwip/netif.h"
00040 #include "lwip/ip_addr.h"
00041 #include "lwip/ip.h"
00042 
00043 #ifdef __cplusplus
00044 extern "C" {
00045 #endif
00046 
00047 #if IP_REASSEMBLY
00048 /* The IP reassembly timer interval in milliseconds. */
00049 #define IP_TMR_INTERVAL 1000
00050 
00051 /* IP reassembly helper struct.
00052  * This is exported because memp needs to know the size.
00053  */
00054 struct ip_reassdata {
00055   struct ip_reassdata *next;
00056   struct pbuf *p;
00057   struct ip_hdr iphdr;
00058   u16_t datagram_len;
00059   u8_t flags;
00060   u8_t timer;
00061 };
00062 
00063 void ip_reass_init(void);
00064 void ip_reass_tmr(void);
00065 struct pbuf * ip_reass(struct pbuf *p);
00066 #endif /* IP_REASSEMBLY */
00067 
00068 #if IP_FRAG
00069 #if !IP_FRAG_USES_STATIC_BUF && !LWIP_NETIF_TX_SINGLE_PBUF
00070 /** A custom pbuf that holds a reference to another pbuf, which is freed
00071  * when this custom pbuf is freed. This is used to create a custom PBUF_REF
00072  * that points into the original pbuf. */
00073 struct pbuf_custom_ref {
00074   /** 'base class' */
00075   struct pbuf_custom pc;
00076   /** pointer to the original pbuf that is referenced */
00077   struct pbuf *original;
00078 };
00079 #endif /* !IP_FRAG_USES_STATIC_BUF && !LWIP_NETIF_TX_SINGLE_PBUF */
00080 
00081 err_t ip_frag(struct pbuf *p, struct netif *netif, ip_addr_t *dest);
00082 #endif /* IP_FRAG */
00083 
00084 #ifdef __cplusplus
00085 }
00086 #endif
00087 
00088 #endif /* __LWIP_IP_FRAG_H__ */