1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/*
* Dynamic data buffer
* Copyright (c) 2007-2012, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#ifndef WPABUF_H
#define WPABUF_H
/* wpabuf::buf is a pointer to external data */
#define WPABUF_FLAG_EXT_DATA BIT(0)
/*
* Internal data structure for wpabuf. Please do not touch this directly from
* elsewhere. This is only defined in header file to allow inline functions
* from this file to access data.
*/
struct wpabuf {
size_t size; /* total size of the allocated buffer */
size_t used; /* length of data in the buffer */
u8 *buf; /* pointer to the head of the buffer */
unsigned int flags;
/* optionally followed by the allocated buffer */
};
int wpabuf_resize(struct wpabuf **buf, size_t add_len);
struct wpabuf * wpabuf_alloc(size_t len);
struct wpabuf * wpabuf_alloc_ext_data(u8 *data, size_t len);
struct wpabuf * wpabuf_alloc_copy(const void *data, size_t len);
struct wpabuf * wpabuf_dup(const struct wpabuf *src);
void wpabuf_free(struct wpabuf *buf);
void * wpabuf_put(struct wpabuf *buf, size_t len);
struct wpabuf * wpabuf_concat(struct wpabuf *a, struct wpabuf *b);
struct wpabuf * wpabuf_zeropad(struct wpabuf *buf, size_t len);
void wpabuf_printf(struct wpabuf *buf, char *fmt, ...) PRINTF_FORMAT(2, 3);
/**
* wpabuf_size - Get the currently allocated size of a wpabuf buffer
* @buf: wpabuf buffer
* Returns: Currently allocated size of the buffer
*/
static inline size_t wpabuf_size(const struct wpabuf *buf)
{
return buf->size;
}
/**
* wpabuf_len - Get the current length of a wpabuf buffer data
* @buf: wpabuf buffer
* Returns: Currently used length of the buffer
*/
static inline size_t wpabuf_len(const struct wpabuf *buf)
{
return buf->used;
}
/**
* wpabuf_tailroom - Get size of available tail room in the end of the buffer
* @buf: wpabuf buffer
* Returns: Tail room (in bytes) of available space in the end of the buffer
*/
static inline size_t wpabuf_tailroom(const struct wpabuf *buf)
{
return buf->size - buf->used;
}
/**
* wpabuf_head - Get pointer to the head of the buffer data
* @buf: wpabuf buffer
* Returns: Pointer to the head of the buffer data
*/
static inline const void * wpabuf_head(const struct wpabuf *buf)
{
return buf->buf;
}
static inline const u8 * wpabuf_head_u8(const struct wpabuf *buf)
{
return wpabuf_head(buf);
}
/**
* wpabuf_mhead - Get modifiable pointer to the head of the buffer data
* @buf: wpabuf buffer
* Returns: Pointer to the head of the buffer data
*/
static inline void * wpabuf_mhead(struct wpabuf *buf)
{
return buf->buf;
}
static inline u8 * wpabuf_mhead_u8(struct wpabuf *buf)
{
return wpabuf_mhead(buf);
}
static inline void wpabuf_put_u8(struct wpabuf *buf, u8 data)
{
u8 *pos = wpabuf_put(buf, 1);
*pos = data;
}
static inline void wpabuf_put_le16(struct wpabuf *buf, u16 data)
{
u8 *pos = wpabuf_put(buf, 2);
WPA_PUT_LE16(pos, data);
}
static inline void wpabuf_put_le32(struct wpabuf *buf, u32 data)
{
u8 *pos = wpabuf_put(buf, 4);
WPA_PUT_LE32(pos, data);
}
static inline void wpabuf_put_be16(struct wpabuf *buf, u16 data)
{
u8 *pos = wpabuf_put(buf, 2);
WPA_PUT_BE16(pos, data);
}
static inline void wpabuf_put_be24(struct wpabuf *buf, u32 data)
{
u8 *pos = wpabuf_put(buf, 3);
WPA_PUT_BE24(pos, data);
}
static inline void wpabuf_put_be32(struct wpabuf *buf, u32 data)
{
u8 *pos = wpabuf_put(buf, 4);
WPA_PUT_BE32(pos, data);
}
static inline void wpabuf_put_data(struct wpabuf *buf, const void *data,
size_t len)
{
if (data)
os_memcpy(wpabuf_put(buf, len), data, len);
}
static inline void wpabuf_put_buf(struct wpabuf *dst,
const struct wpabuf *src)
{
wpabuf_put_data(dst, wpabuf_head(src), wpabuf_len(src));
}
static inline void wpabuf_set(struct wpabuf *buf, const void *data, size_t len)
{
buf->buf = (u8 *) data;
buf->flags = WPABUF_FLAG_EXT_DATA;
buf->size = buf->used = len;
}
static inline void wpabuf_put_str(struct wpabuf *dst, const char *str)
{
wpabuf_put_data(dst, str, os_strlen(str));
}
#endif /* WPABUF_H */
|
