1/**
2 * @file
3 * SNMP pbuf stream wrapper (internal API, do not use in client code).
4 */
5
6/*
7 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without modification,
11 * are permitted provided that the following conditions are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright notice,
14 *    this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright notice,
16 *    this list of conditions and the following disclaimer in the documentation
17 *    and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
24 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
26 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
29 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
30 * OF SUCH DAMAGE.
31 *
32 * This file is part of the lwIP TCP/IP stack.
33 *
34 * Author: Martin Hentschel <info@cl-soft.de>
35 *
36 */
37
38#ifndef LWIP_HDR_APPS_SNMP_PBUF_STREAM_H
39#define LWIP_HDR_APPS_SNMP_PBUF_STREAM_H
40
41#include "lwip/apps/snmp_opts.h"
42
43#if LWIP_SNMP
44
45#include "lwip/err.h"
46#include "lwip/pbuf.h"
47
48#ifdef __cplusplus
49extern "C" {
50#endif
51
52struct snmp_pbuf_stream
53{
54  struct pbuf* pbuf;
55  u16_t offset;
56  u16_t length;
57};
58
59err_t snmp_pbuf_stream_init(struct snmp_pbuf_stream* pbuf_stream, struct pbuf* p, u16_t offset, u16_t length);
60err_t snmp_pbuf_stream_read(struct snmp_pbuf_stream* pbuf_stream, u8_t* data);
61err_t snmp_pbuf_stream_write(struct snmp_pbuf_stream* pbuf_stream, u8_t data);
62err_t snmp_pbuf_stream_writebuf(struct snmp_pbuf_stream* pbuf_stream, const void* buf, u16_t buf_len);
63err_t snmp_pbuf_stream_writeto(struct snmp_pbuf_stream* pbuf_stream, struct snmp_pbuf_stream* target_pbuf_stream, u16_t len);
64err_t snmp_pbuf_stream_seek(struct snmp_pbuf_stream* pbuf_stream, s32_t offset);
65err_t snmp_pbuf_stream_seek_abs(struct snmp_pbuf_stream* pbuf_stream, u32_t offset);
66
67#ifdef __cplusplus
68}
69#endif
70
71#endif /* LWIP_SNMP */
72
73#endif /* LWIP_HDR_APPS_SNMP_PBUF_STREAM_H */
74