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https://gitee.com/Vancouver2017/luban-lite.git
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133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/*
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* Dynamic data buffer
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* Copyright (c) 2007-2012, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#ifndef WPABUF_H
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#define WPABUF_H
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/* wpabuf::buf is a pointer to external data */
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#define WPABUF_FLAG_EXT_DATA BIT(0)
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/*
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* Internal data structure for wpabuf. Please do not touch this directly from
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* elsewhere. This is only defined in header file to allow inline functions
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* from this file to access data.
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*/
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struct wpabuf {
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atbm_uint16 size; /* total size of the allocated buffer */
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atbm_uint16 used; /* length of data in the buffer */
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atbm_uint8 *buf; /* pointer to the head of the buffer */
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atbm_uint32 flags;
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/* optionally followed by the allocated buffer */
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};
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int wpabuf_resize(struct wpabuf **buf, atbm_size_t add_len);
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#define wpabuf_alloc(l) wpabuf_alloc_1(l,(unsigned long)__builtin_return_address(0))
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struct wpabuf * wpabuf_alloc_1(atbm_size_t len,atbm_uint32 call);
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struct wpabuf * wpabuf_alloc_ext_data(atbm_uint8 *data, atbm_size_t len);
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struct wpabuf * wpabuf_alloc_copy(const atbm_void *data, atbm_size_t len);
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struct wpabuf * wpabuf_dup(const struct wpabuf *src);
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void wpabuf_free(struct wpabuf *buf);
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void wpabuf_clear_free(struct wpabuf *buf);
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void * wpabuf_put(struct wpabuf *buf, atbm_size_t len);
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struct wpabuf * wpabuf_concat(struct wpabuf *a, struct wpabuf *b);
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struct wpabuf * wpabuf_zeropad(struct wpabuf *buf, atbm_size_t len);
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void wpabuf_printf(struct wpabuf *buf, char *fmt, ...);
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/**
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* wpabuf_size - Get the currently allocated size of a wpabuf buffer
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* @buf: wpabuf buffer
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* Returns: Currently allocated size of the buffer
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*/
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static inline atbm_size_t wpabuf_size(const struct wpabuf *buf)
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{
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return buf->size;
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}
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/**
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* wpabuf_len - Get the current length of a wpabuf buffer data
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* @buf: wpabuf buffer
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* Returns: Currently used length of the buffer
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*/
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static inline atbm_size_t wpabuf_len(const struct wpabuf *buf)
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{
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return buf->used;
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}
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/**
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* wpabuf_tailroom - Get size of available tail room in the end of the buffer
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* @buf: wpabuf buffer
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* Returns: Tail room (in bytes) of available space in the end of the buffer
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*/
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static inline atbm_size_t wpabuf_tailroom(const struct wpabuf *buf)
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{
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return buf->size - buf->used;
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}
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/**
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* wpabuf_head - Get pointer to the head of the buffer data
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* @buf: wpabuf buffer
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* Returns: Pointer to the head of the buffer data
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*/
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static inline const atbm_void * wpabuf_head(const struct wpabuf *buf)
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{
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return buf->buf;
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}
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static inline const atbm_uint8 * wpabuf_head_u8(const struct wpabuf *buf)
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{
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return wpabuf_head(buf);
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}
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/**
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* wpabuf_mhead - Get modifiable pointer to the head of the buffer data
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* @buf: wpabuf buffer
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* Returns: Pointer to the head of the buffer data
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*/
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static inline atbm_void * wpabuf_mhead(struct wpabuf *buf)
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{
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return buf->buf;
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}
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static inline atbm_uint8 * wpabuf_mhead_u8(struct wpabuf *buf)
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{
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return wpabuf_mhead(buf);
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}
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void wpabuf_put_le32(struct wpabuf *buf, atbm_uint32 data);
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void wpabuf_put_be16(struct wpabuf *buf, atbm_uint16 data);
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void wpabuf_put_u8(struct wpabuf *buf, atbm_uint8 data);
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void wpabuf_put_le16(struct wpabuf *buf, atbm_uint16 data);
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void wpabuf_put_be24(struct wpabuf *buf, atbm_uint32 data);
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void wpabuf_put_be32(struct wpabuf *buf, atbm_uint32 data);
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void wpabuf_put_data(struct wpabuf *buf, const atbm_void *data,
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atbm_size_t len);
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void wpabuf_put_buf(struct wpabuf *dst,
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const struct wpabuf *src);
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static inline atbm_void wpabuf_set(struct wpabuf *buf, const atbm_void *data, atbm_size_t len)
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{
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buf->buf = (atbm_uint8 *) data;
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buf->flags = WPABUF_FLAG_EXT_DATA;
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buf->size = buf->used = len;
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}
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static inline atbm_void wpabuf_put_str(struct wpabuf *dst, const char *str)
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{
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wpabuf_put_data(dst, str, strlen(str));
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}
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#endif /* WPABUF_H */
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