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: Adam Dunkels <adam@sics.se> 30 * 31 */ 32#ifndef __LWIP_NETBUF_H__ 33#define __LWIP_NETBUF_H__ 34 35#include "lwip/opt.h" 36#include "lwip/pbuf.h" 37 38#ifdef __cplusplus 39extern "C" { 40#endif 41 42 struct netbuf { 43 struct pbuf *p, *ptr; 44 struct ip_addr *addr; 45 u16_t port; 46 }; 47 48/* Network buffer functions: */ 49 struct netbuf *netbuf_new(void); 50 void netbuf_delete(struct netbuf *buf); 51 void *netbuf_alloc(struct netbuf *buf, u16_t size); 52 void netbuf_free(struct netbuf *buf); 53 err_t netbuf_ref(struct netbuf *buf, const void *dataptr, u16_t size); 54 void netbuf_chain(struct netbuf *head, struct netbuf *tail); 55 56 u16_t netbuf_len(struct netbuf *buf); 57 err_t netbuf_data(struct netbuf *buf, void **dataptr, u16_t * len); 58 s8_t netbuf_next(struct netbuf *buf); 59 void netbuf_first(struct netbuf *buf); 60 61 62#define netbuf_copy_partial(buf, dataptr, len, offset) \ 63 pbuf_copy_partial((buf)->p, (dataptr), (len), (offset)) 64#define netbuf_copy(buf,dataptr,len) netbuf_copy_partial(buf, dataptr, len, 0) 65#define netbuf_take(buf, dataptr, len) pbuf_take((buf)->p, dataptr, len) 66#define netbuf_len(buf) ((buf)->p->tot_len) 67#define netbuf_fromaddr(buf) ((buf)->addr) 68#define netbuf_fromport(buf) ((buf)->port) 69 70#ifdef __cplusplus 71} 72#endif 73#endif /* __LWIP_NETBUF_H__ */ 74