1*10465441SEvalZero /** 2*10465441SEvalZero * @file 3*10465441SEvalZero * IP fragmentation/reassembly 4*10465441SEvalZero */ 5*10465441SEvalZero 6*10465441SEvalZero /* 7*10465441SEvalZero * Copyright (c) 2001-2004 Swedish Institute of Computer Science. 8*10465441SEvalZero * All rights reserved. 9*10465441SEvalZero * 10*10465441SEvalZero * Redistribution and use in source and binary forms, with or without modification, 11*10465441SEvalZero * are permitted provided that the following conditions are met: 12*10465441SEvalZero * 13*10465441SEvalZero * 1. Redistributions of source code must retain the above copyright notice, 14*10465441SEvalZero * this list of conditions and the following disclaimer. 15*10465441SEvalZero * 2. Redistributions in binary form must reproduce the above copyright notice, 16*10465441SEvalZero * this list of conditions and the following disclaimer in the documentation 17*10465441SEvalZero * and/or other materials provided with the distribution. 18*10465441SEvalZero * 3. The name of the author may not be used to endorse or promote products 19*10465441SEvalZero * derived from this software without specific prior written permission. 20*10465441SEvalZero * 21*10465441SEvalZero * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 22*10465441SEvalZero * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 23*10465441SEvalZero * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 24*10465441SEvalZero * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 25*10465441SEvalZero * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 26*10465441SEvalZero * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27*10465441SEvalZero * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28*10465441SEvalZero * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 29*10465441SEvalZero * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 30*10465441SEvalZero * OF SUCH DAMAGE. 31*10465441SEvalZero * 32*10465441SEvalZero * This file is part of the lwIP TCP/IP stack. 33*10465441SEvalZero * 34*10465441SEvalZero * Author: Jani Monoses <[email protected]> 35*10465441SEvalZero * 36*10465441SEvalZero */ 37*10465441SEvalZero 38*10465441SEvalZero #ifndef LWIP_HDR_IP4_FRAG_H 39*10465441SEvalZero #define LWIP_HDR_IP4_FRAG_H 40*10465441SEvalZero 41*10465441SEvalZero #include "lwip/opt.h" 42*10465441SEvalZero #include "lwip/err.h" 43*10465441SEvalZero #include "lwip/pbuf.h" 44*10465441SEvalZero #include "lwip/netif.h" 45*10465441SEvalZero #include "lwip/ip_addr.h" 46*10465441SEvalZero #include "lwip/ip.h" 47*10465441SEvalZero 48*10465441SEvalZero #if LWIP_IPV4 49*10465441SEvalZero 50*10465441SEvalZero #ifdef __cplusplus 51*10465441SEvalZero extern "C" { 52*10465441SEvalZero #endif 53*10465441SEvalZero 54*10465441SEvalZero #if IP_REASSEMBLY 55*10465441SEvalZero /* The IP reassembly timer interval in milliseconds. */ 56*10465441SEvalZero #define IP_TMR_INTERVAL 1000 57*10465441SEvalZero 58*10465441SEvalZero /** IP reassembly helper struct. 59*10465441SEvalZero * This is exported because memp needs to know the size. 60*10465441SEvalZero */ 61*10465441SEvalZero struct ip_reassdata { 62*10465441SEvalZero struct ip_reassdata *next; 63*10465441SEvalZero struct pbuf *p; 64*10465441SEvalZero struct ip_hdr iphdr; 65*10465441SEvalZero u16_t datagram_len; 66*10465441SEvalZero u8_t flags; 67*10465441SEvalZero u8_t timer; 68*10465441SEvalZero }; 69*10465441SEvalZero 70*10465441SEvalZero void ip_reass_init(void); 71*10465441SEvalZero void ip_reass_tmr(void); 72*10465441SEvalZero struct pbuf * ip4_reass(struct pbuf *p); 73*10465441SEvalZero #endif /* IP_REASSEMBLY */ 74*10465441SEvalZero 75*10465441SEvalZero #if IP_FRAG 76*10465441SEvalZero #if !LWIP_NETIF_TX_SINGLE_PBUF 77*10465441SEvalZero #ifndef LWIP_PBUF_CUSTOM_REF_DEFINED 78*10465441SEvalZero #define LWIP_PBUF_CUSTOM_REF_DEFINED 79*10465441SEvalZero /** A custom pbuf that holds a reference to another pbuf, which is freed 80*10465441SEvalZero * when this custom pbuf is freed. This is used to create a custom PBUF_REF 81*10465441SEvalZero * that points into the original pbuf. */ 82*10465441SEvalZero struct pbuf_custom_ref { 83*10465441SEvalZero /** 'base class' */ 84*10465441SEvalZero struct pbuf_custom pc; 85*10465441SEvalZero /** pointer to the original pbuf that is referenced */ 86*10465441SEvalZero struct pbuf *original; 87*10465441SEvalZero }; 88*10465441SEvalZero #endif /* LWIP_PBUF_CUSTOM_REF_DEFINED */ 89*10465441SEvalZero #endif /* !LWIP_NETIF_TX_SINGLE_PBUF */ 90*10465441SEvalZero 91*10465441SEvalZero err_t ip4_frag(struct pbuf *p, struct netif *netif, const ip4_addr_t *dest); 92*10465441SEvalZero #endif /* IP_FRAG */ 93*10465441SEvalZero 94*10465441SEvalZero #ifdef __cplusplus 95*10465441SEvalZero } 96*10465441SEvalZero #endif 97*10465441SEvalZero 98*10465441SEvalZero #endif /* LWIP_IPV4 */ 99*10465441SEvalZero 100*10465441SEvalZero #endif /* LWIP_HDR_IP4_FRAG_H */ 101