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