OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [Common/] [ethernet/] [lwIP_132/] [src/] [include/] [lwip/] [pbuf.h] - Blame information for rev 606

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 606 jeremybenn
/*
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
 
33
#ifndef __LWIP_PBUF_H__
34
#define __LWIP_PBUF_H__
35
 
36
#include "lwip/opt.h"
37
#include "lwip/err.h"
38
 
39
#ifdef __cplusplus
40
extern "C" {
41
#endif
42
 
43
#define PBUF_TRANSPORT_HLEN 20
44
#define PBUF_IP_HLEN        20
45
 
46
typedef enum {
47
  PBUF_TRANSPORT,
48
  PBUF_IP,
49
  PBUF_LINK,
50
  PBUF_RAW
51
} pbuf_layer;
52
 
53
typedef enum {
54
  PBUF_RAM, /* pbuf data is stored in RAM */
55
  PBUF_ROM, /* pbuf data is stored in ROM */
56
  PBUF_REF, /* pbuf comes from the pbuf pool */
57
  PBUF_POOL /* pbuf payload refers to RAM */
58
} pbuf_type;
59
 
60
 
61
/** indicates this packet's data should be immediately passed to the application */
62
#define PBUF_FLAG_PUSH 0x01U
63
 
64
struct pbuf {
65
  /** next pbuf in singly linked pbuf chain */
66
  struct pbuf *next;
67
 
68
  /** pointer to the actual data in the buffer */
69
  void *payload;
70
 
71
  /**
72
   * total length of this buffer and all next buffers in chain
73
   * belonging to the same packet.
74
   *
75
   * For non-queue packet chains this is the invariant:
76
   * p->tot_len == p->len + (p->next? p->next->tot_len: 0)
77
   */
78
  u16_t tot_len;
79
 
80
  /** length of this buffer */
81
  u16_t len;
82
 
83
  /** pbuf_type as u8_t instead of enum to save space */
84
  u8_t /*pbuf_type*/ type;
85
 
86
  /** misc flags */
87
  u8_t flags;
88
 
89
  /**
90
   * the reference count always equals the number of pointers
91
   * that refer to this pbuf. This can be pointers from an application,
92
   * the stack itself, or pbuf->next pointers from a chain.
93
   */
94
  u16_t ref;
95
 
96
};
97
 
98
/* Initializes the pbuf module. This call is empty for now, but may not be in future. */
99
#define pbuf_init()
100
 
101
struct pbuf *pbuf_alloc(pbuf_layer l, u16_t size, pbuf_type type);
102
void pbuf_realloc(struct pbuf *p, u16_t size);
103
u8_t pbuf_header(struct pbuf *p, s16_t header_size);
104
void pbuf_ref(struct pbuf *p);
105
void pbuf_ref_chain(struct pbuf *p);
106
u8_t pbuf_free(struct pbuf *p);
107
u8_t pbuf_clen(struct pbuf *p);
108
void pbuf_cat(struct pbuf *head, struct pbuf *tail);
109
void pbuf_chain(struct pbuf *head, struct pbuf *tail);
110
struct pbuf *pbuf_dechain(struct pbuf *p);
111
err_t pbuf_copy(struct pbuf *p_to, struct pbuf *p_from);
112
u16_t pbuf_copy_partial(struct pbuf *p, void *dataptr, u16_t len, u16_t offset);
113
err_t pbuf_take(struct pbuf *buf, const void *dataptr, u16_t len);
114
struct pbuf *pbuf_coalesce(struct pbuf *p, pbuf_layer layer);
115
 
116
#ifdef __cplusplus
117
}
118
#endif
119
 
120
#endif /* __LWIP_PBUF_H__ */

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.