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ip6_frag.h
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00001 /** 00002 * @file 00003 * 00004 * IPv6 fragmentation and reassembly. 00005 */ 00006 00007 /* 00008 * Copyright (c) 2010 Inico Technologies Ltd. 00009 * All rights reserved. 00010 * 00011 * Redistribution and use in source and binary forms, with or without modification, 00012 * are permitted provided that the following conditions are met: 00013 * 00014 * 1. Redistributions of source code must retain the above copyright notice, 00015 * this list of conditions and the following disclaimer. 00016 * 2. Redistributions in binary form must reproduce the above copyright notice, 00017 * this list of conditions and the following disclaimer in the documentation 00018 * and/or other materials provided with the distribution. 00019 * 3. The name of the author may not be used to endorse or promote products 00020 * derived from this software without specific prior written permission. 00021 * 00022 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 00023 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00024 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 00025 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00026 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 00027 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00028 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00029 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 00030 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 00031 * OF SUCH DAMAGE. 00032 * 00033 * This file is part of the lwIP TCP/IP stack. 00034 * 00035 * Author: Ivan Delamer <delamer@inicotech.com> 00036 * 00037 * 00038 * Please coordinate changes and requests with Ivan Delamer 00039 * <delamer@inicotech.com> 00040 */ 00041 #ifndef LWIP_HDR_IP6_FRAG_H 00042 #define LWIP_HDR_IP6_FRAG_H 00043 00044 #include "lwip/opt.h" 00045 #include "lwip/pbuf.h" 00046 #include "lwip/ip6_addr.h" 00047 #include "lwip/ip6.h" 00048 #include "lwip/netif.h" 00049 00050 #ifdef __cplusplus 00051 extern "C" { 00052 #endif 00053 00054 00055 #if LWIP_IPV6 && LWIP_IPV6_REASS /* don't build if not configured for use in lwipopts.h */ 00056 00057 /** IP6_FRAG_COPYHEADER==1: for platforms where sizeof(void*) > 4, this needs to 00058 * be enabled (to not overwrite part of the data). When enabled, the IPv6 header 00059 * is copied instead of referencing it, which gives more room for struct ip6_reass_helper */ 00060 #ifndef IPV6_FRAG_COPYHEADER 00061 #define IPV6_FRAG_COPYHEADER 0 00062 #endif 00063 00064 /** The IPv6 reassembly timer interval in milliseconds. */ 00065 #define IP6_REASS_TMR_INTERVAL 1000 00066 00067 /* Copy the complete header of the first fragment to struct ip6_reassdata 00068 or just point to its original location in the first pbuf? */ 00069 #if IPV6_FRAG_COPYHEADER 00070 #define IPV6_FRAG_HDRPTR 00071 #define IPV6_FRAG_HDRREF(hdr) (&(hdr)) 00072 #else /* IPV6_FRAG_COPYHEADER */ 00073 #define IPV6_FRAG_HDRPTR * 00074 #define IPV6_FRAG_HDRREF(hdr) (hdr) 00075 #endif /* IPV6_FRAG_COPYHEADER */ 00076 00077 /** IPv6 reassembly helper struct. 00078 * This is exported because memp needs to know the size. 00079 */ 00080 struct ip6_reassdata { 00081 struct ip6_reassdata *next; 00082 struct pbuf *p; 00083 struct ip6_hdr IPV6_FRAG_HDRPTR iphdr; 00084 u32_t identification; 00085 u16_t datagram_len; 00086 u8_t nexth; 00087 u8_t timer; 00088 }; 00089 00090 #define ip6_reass_init() /* Compatibility define */ 00091 void ip6_reass_tmr(void); 00092 struct pbuf *ip6_reass(struct pbuf *p); 00093 00094 #endif /* LWIP_IPV6 && LWIP_IPV6_REASS */ 00095 00096 #if LWIP_IPV6 && LWIP_IPV6_FRAG /* don't build if not configured for use in lwipopts.h */ 00097 00098 #ifndef LWIP_PBUF_CUSTOM_REF_DEFINED 00099 #define LWIP_PBUF_CUSTOM_REF_DEFINED 00100 /** A custom pbuf that holds a reference to another pbuf, which is freed 00101 * when this custom pbuf is freed. This is used to create a custom PBUF_REF 00102 * that points into the original pbuf. */ 00103 struct pbuf_custom_ref { 00104 /** 'base class' */ 00105 struct pbuf_custom pc; 00106 /** pointer to the original pbuf that is referenced */ 00107 struct pbuf *original; 00108 }; 00109 #endif /* LWIP_PBUF_CUSTOM_REF_DEFINED */ 00110 00111 err_t ip6_frag(struct pbuf *p, struct netif *netif, const ip6_addr_t *dest); 00112 00113 #endif /* LWIP_IPV6 && LWIP_IPV6_FRAG */ 00114 00115 00116 #ifdef __cplusplus 00117 } 00118 #endif 00119 00120 #endif /* LWIP_HDR_IP6_FRAG_H */
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