3 * Copyright (c) 2007-2012, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
16 /* wpabuf::buf is a pointer to external data */
17 #define WPABUF_FLAG_EXT_DATA BIT(0)
20 * Internal data structure for wpabuf. Please do not touch this directly from
21 * elsewhere. This is only defined in header file to allow inline functions
22 * from this file to access data.
25 size_t size; /* total size of the allocated buffer */
26 size_t used; /* length of data in the buffer */
27 u8 *buf; /* pointer to the head of the buffer */
29 /* optionally followed by the allocated buffer */
33 int wpabuf_resize(struct wpabuf **buf, size_t add_len);
34 struct wpabuf * wpabuf_alloc(size_t len);
35 struct wpabuf * wpabuf_alloc_ext_data(u8 *data, size_t len);
36 struct wpabuf * wpabuf_alloc_copy(const void *data, size_t len);
37 struct wpabuf * wpabuf_dup(const struct wpabuf *src);
38 void wpabuf_free(struct wpabuf *buf);
39 void wpabuf_clear_free(struct wpabuf *buf);
40 void * wpabuf_put(struct wpabuf *buf, size_t len);
41 struct wpabuf * wpabuf_concat(struct wpabuf *a, struct wpabuf *b);
42 struct wpabuf * wpabuf_zeropad(struct wpabuf *buf, size_t len);
43 void wpabuf_printf(struct wpabuf *buf, char *fmt, ...) PRINTF_FORMAT(2, 3);
47 * wpabuf_size - Get the currently allocated size of a wpabuf buffer
49 * Returns: Currently allocated size of the buffer
51 static inline size_t wpabuf_size(const struct wpabuf *buf)
57 * wpabuf_len - Get the current length of a wpabuf buffer data
59 * Returns: Currently used length of the buffer
61 static inline size_t wpabuf_len(const struct wpabuf *buf)
67 * wpabuf_tailroom - Get size of available tail room in the end of the buffer
69 * Returns: Tail room (in bytes) of available space in the end of the buffer
71 static inline size_t wpabuf_tailroom(const struct wpabuf *buf)
73 return buf->size - buf->used;
77 * wpabuf_head - Get pointer to the head of the buffer data
79 * Returns: Pointer to the head of the buffer data
81 static inline const void * wpabuf_head(const struct wpabuf *buf)
86 static inline const u8 * wpabuf_head_u8(const struct wpabuf *buf)
88 return (const u8 *)wpabuf_head(buf);
92 * wpabuf_mhead - Get modifiable pointer to the head of the buffer data
94 * Returns: Pointer to the head of the buffer data
96 static inline void * wpabuf_mhead(struct wpabuf *buf)
101 static inline u8 * wpabuf_mhead_u8(struct wpabuf *buf)
103 return (u8 *)wpabuf_mhead(buf);
106 static inline void wpabuf_put_u8(struct wpabuf *buf, u8 data)
108 u8 *pos = (u8 *)wpabuf_put(buf, 1);
112 static inline void wpabuf_put_le16(struct wpabuf *buf, u16 data)
114 u8 *pos = (u8 *)wpabuf_put(buf, 2);
115 WPA_PUT_LE16(pos, data);
118 static inline void wpabuf_put_le32(struct wpabuf *buf, u32 data)
120 u8 *pos = (u8 *)wpabuf_put(buf, 4);
121 WPA_PUT_LE32(pos, data);
124 static inline void wpabuf_put_be16(struct wpabuf *buf, u16 data)
126 u8 *pos = (u8 *)wpabuf_put(buf, 2);
127 WPA_PUT_BE16(pos, data);
130 static inline void wpabuf_put_be24(struct wpabuf *buf, u32 data)
132 u8 *pos = (u8 *)wpabuf_put(buf, 3);
133 WPA_PUT_BE24(pos, data);
136 static inline void wpabuf_put_be32(struct wpabuf *buf, u32 data)
138 u8 *pos = (u8 *)wpabuf_put(buf, 4);
139 WPA_PUT_BE32(pos, data);
142 static inline void wpabuf_put_data(struct wpabuf *buf, const void *data,
146 os_memcpy(wpabuf_put(buf, len), data, len);
149 static inline void wpabuf_put_buf(struct wpabuf *dst,
150 const struct wpabuf *src)
152 wpabuf_put_data(dst, wpabuf_head(src), wpabuf_len(src));
155 static inline void wpabuf_set(struct wpabuf *buf, const void *data, size_t len)
157 buf->buf = (u8 *) data;
158 buf->flags = WPABUF_FLAG_EXT_DATA;
159 buf->size = buf->used = len;
162 static inline void wpabuf_put_str(struct wpabuf *dst, const char *str)
164 wpabuf_put_data(dst, str, os_strlen(str));
171 #endif /* WPABUF_H */