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.
12 /* wpabuf::buf is a pointer to external data */
13 #define WPABUF_FLAG_EXT_DATA BIT(0)
16 * Internal data structure for wpabuf. Please do not touch this directly from
17 * elsewhere. This is only defined in header file to allow inline functions
18 * from this file to access data.
21 size_t size; /* total size of the allocated buffer */
22 size_t used; /* length of data in the buffer */
23 u8 *buf; /* pointer to the head of the buffer */
25 /* optionally followed by the allocated buffer */
29 int wpabuf_resize(struct wpabuf **buf, size_t add_len);
30 struct wpabuf * wpabuf_alloc(size_t len);
31 struct wpabuf * wpabuf_alloc_ext_data(u8 *data, size_t len);
32 struct wpabuf * wpabuf_alloc_copy(const void *data, size_t len);
33 struct wpabuf * wpabuf_dup(const struct wpabuf *src);
34 void wpabuf_free(struct wpabuf *buf);
35 void * wpabuf_put(struct wpabuf *buf, size_t len);
36 struct wpabuf * wpabuf_concat(struct wpabuf *a, struct wpabuf *b);
37 struct wpabuf * wpabuf_zeropad(struct wpabuf *buf, size_t len);
38 void wpabuf_printf(struct wpabuf *buf, char *fmt, ...) PRINTF_FORMAT(2, 3);
42 * wpabuf_size - Get the currently allocated size of a wpabuf buffer
44 * Returns: Currently allocated size of the buffer
46 static inline size_t wpabuf_size(const struct wpabuf *buf)
52 * wpabuf_len - Get the current length of a wpabuf buffer data
54 * Returns: Currently used length of the buffer
56 static inline size_t wpabuf_len(const struct wpabuf *buf)
62 * wpabuf_tailroom - Get size of available tail room in the end of the buffer
64 * Returns: Tail room (in bytes) of available space in the end of the buffer
66 static inline size_t wpabuf_tailroom(const struct wpabuf *buf)
68 return buf->size - buf->used;
72 * wpabuf_head - Get pointer to the head of the buffer data
74 * Returns: Pointer to the head of the buffer data
76 static inline const void * wpabuf_head(const struct wpabuf *buf)
81 static inline const u8 * wpabuf_head_u8(const struct wpabuf *buf)
83 return wpabuf_head(buf);
87 * wpabuf_mhead - Get modifiable pointer to the head of the buffer data
89 * Returns: Pointer to the head of the buffer data
91 static inline void * wpabuf_mhead(struct wpabuf *buf)
96 static inline u8 * wpabuf_mhead_u8(struct wpabuf *buf)
98 return wpabuf_mhead(buf);
101 static inline void wpabuf_put_u8(struct wpabuf *buf, u8 data)
103 u8 *pos = wpabuf_put(buf, 1);
107 static inline void wpabuf_put_le16(struct wpabuf *buf, u16 data)
109 u8 *pos = wpabuf_put(buf, 2);
110 WPA_PUT_LE16(pos, data);
113 static inline void wpabuf_put_le32(struct wpabuf *buf, u32 data)
115 u8 *pos = wpabuf_put(buf, 4);
116 WPA_PUT_LE32(pos, data);
119 static inline void wpabuf_put_be16(struct wpabuf *buf, u16 data)
121 u8 *pos = wpabuf_put(buf, 2);
122 WPA_PUT_BE16(pos, data);
125 static inline void wpabuf_put_be24(struct wpabuf *buf, u32 data)
127 u8 *pos = wpabuf_put(buf, 3);
128 WPA_PUT_BE24(pos, data);
131 static inline void wpabuf_put_be32(struct wpabuf *buf, u32 data)
133 u8 *pos = wpabuf_put(buf, 4);
134 WPA_PUT_BE32(pos, data);
137 static inline void wpabuf_put_data(struct wpabuf *buf, const void *data,
141 os_memcpy(wpabuf_put(buf, len), data, len);
144 static inline void wpabuf_put_buf(struct wpabuf *dst,
145 const struct wpabuf *src)
147 wpabuf_put_data(dst, wpabuf_head(src), wpabuf_len(src));
150 static inline void wpabuf_set(struct wpabuf *buf, const void *data, size_t len)
152 buf->buf = (u8 *) data;
153 buf->flags = WPABUF_FLAG_EXT_DATA;
154 buf->size = buf->used = len;
157 static inline void wpabuf_put_str(struct wpabuf *dst, const char *str)
159 wpabuf_put_data(dst, str, os_strlen(str));
162 #endif /* WPABUF_H */