3 * Copyright (c) 2007-2009, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
23 * Internal data structure for wpabuf. Please do not touch this directly from
24 * elsewhere. This is only defined in header file to allow inline functions
25 * from this file to access data.
28 size_t size; /* total size of the allocated buffer */
29 size_t used; /* length of data in the buffer */
30 u8 *ext_data; /* pointer to external data; NULL if data follows
32 /* optionally followed by the allocated buffer */
36 int wpabuf_resize(struct wpabuf **buf, size_t add_len);
37 struct wpabuf * wpabuf_alloc(size_t len);
38 struct wpabuf * wpabuf_alloc_ext_data(u8 *data, size_t len);
39 struct wpabuf * wpabuf_alloc_copy(const void *data, size_t len);
40 struct wpabuf * wpabuf_dup(const struct wpabuf *src);
41 void wpabuf_free(struct wpabuf *buf);
42 void * wpabuf_put(struct wpabuf *buf, size_t len);
43 struct wpabuf * wpabuf_concat(struct wpabuf *a, struct wpabuf *b);
44 struct wpabuf * wpabuf_zeropad(struct wpabuf *buf, size_t len);
45 void wpabuf_printf(struct wpabuf *buf, char *fmt, ...) PRINTF_FORMAT(2, 3);
49 * wpabuf_size - Get the currently allocated size of a wpabuf buffer
51 * Returns: Currently allocated size of the buffer
53 static inline size_t wpabuf_size(const struct wpabuf *buf)
59 * wpabuf_len - Get the current length of a wpabuf buffer data
61 * Returns: Currently used length of the buffer
63 static inline size_t wpabuf_len(const struct wpabuf *buf)
69 * wpabuf_tailroom - Get size of available tail room in the end of the buffer
71 * Returns: Tail room (in bytes) of available space in the end of the buffer
73 static inline size_t wpabuf_tailroom(const struct wpabuf *buf)
75 return buf->size - buf->used;
79 * wpabuf_head - Get pointer to the head of the buffer data
81 * Returns: Pointer to the head of the buffer data
83 static inline const void * wpabuf_head(const struct wpabuf *buf)
90 static inline const u8 * wpabuf_head_u8(const struct wpabuf *buf)
92 return (const u8 *)wpabuf_head(buf);
96 * wpabuf_mhead - Get modifiable pointer to the head of the buffer data
98 * Returns: Pointer to the head of the buffer data
100 static inline void * wpabuf_mhead(struct wpabuf *buf)
103 return buf->ext_data;
107 static inline u8 * wpabuf_mhead_u8(struct wpabuf *buf)
109 return (u8 *)wpabuf_mhead(buf);
112 static inline void wpabuf_put_u8(struct wpabuf *buf, u8 data)
114 u8 *pos = (u8 *)wpabuf_put(buf, 1);
118 static inline void wpabuf_put_le16(struct wpabuf *buf, u16 data)
120 u8 *pos = (u8 *)wpabuf_put(buf, 2);
121 WPA_PUT_LE16(pos, data);
124 static inline void wpabuf_put_le32(struct wpabuf *buf, u32 data)
126 u8 *pos = (u8 *)wpabuf_put(buf, 4);
127 WPA_PUT_LE32(pos, data);
130 static inline void wpabuf_put_be16(struct wpabuf *buf, u16 data)
132 u8 *pos = (u8 *)wpabuf_put(buf, 2);
133 WPA_PUT_BE16(pos, data);
136 static inline void wpabuf_put_be24(struct wpabuf *buf, u32 data)
138 u8 *pos = (u8 *)wpabuf_put(buf, 3);
139 WPA_PUT_BE24(pos, data);
142 static inline void wpabuf_put_be32(struct wpabuf *buf, u32 data)
144 u8 *pos = (u8 *)wpabuf_put(buf, 4);
145 WPA_PUT_BE32(pos, data);
148 static inline void wpabuf_put_data(struct wpabuf *buf, const void *data,
152 os_memcpy(wpabuf_put(buf, len), data, len);
155 static inline void wpabuf_put_buf(struct wpabuf *dst,
156 const struct wpabuf *src)
158 wpabuf_put_data(dst, wpabuf_head(src), wpabuf_len(src));
161 static inline void wpabuf_set(struct wpabuf *buf, const void *data, size_t len)
163 buf->ext_data = (u8 *) data;
164 buf->size = buf->used = len;
167 static inline void wpabuf_put_str(struct wpabuf *dst, const char *str)
169 wpabuf_put_data(dst, str, os_strlen(str));
176 #endif /* WPABUF_H */