wpabuf.h File Reference

Dynamic data buffer. More...

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Data Structures
struct	wpabuf
Functions
int	wpabuf_resize (struct wpabuf **buf, size_t add_len)
struct wpabuf *	wpabuf_alloc (size_t len)
	Allocate a wpabuf of the given size.
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)
	Free a wpabuf.
void *	wpabuf_put (struct wpabuf *buf, size_t len)
struct wpabuf *	wpabuf_concat (struct wpabuf *a, struct wpabuf *b)
	Concatenate two buffers into a newly allocated one.
struct wpabuf *	wpabuf_zeropad (struct wpabuf *buf, size_t len)
	Pad buffer with 0x00 octets (prefix) to specified length.
void	wpabuf_printf (struct wpabuf *buf, char *fmt,...) PRINTF_FORMAT(2

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Detailed Description

Dynamic data buffer.

Copyright

Copyright (c) 2007-2009, Jouni Malinen <j@w1.fi>

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation.

Alternatively, this software may be distributed under the terms of BSD license.

See README and COPYING for more details.

Definition in file wpabuf.h.

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Function Documentation

struct wpabuf* wpabuf_alloc

(

size_t

len

)

[read]

Allocate a wpabuf of the given size.

Parameters:

len

Length for the allocated buffer

Returns:

Buffer to the allocated wpabuf or NULL on failure

Definition at line 64 of file wpabuf.c.

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struct wpabuf* wpabuf_concat	(	struct wpabuf *	a,
		struct wpabuf *	b
	)			[read]

Concatenate two buffers into a newly allocated one.

Parameters:

	a	First buffer
	b	Second buffer

Returns:

wpabuf with concatenated a + b data or NULL on failure

Both buffers a and b will be freed regardless of the return value. Input buffers can be NULL which is interpreted as an empty buffer.

Definition at line 141 of file wpabuf.c.

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void wpabuf_free

(

struct wpabuf *

buf

)

Free a wpabuf.

Parameters:

buf

wpabuf buffer

Definition at line 111 of file wpabuf.c.

struct wpabuf* wpabuf_zeropad	(	struct wpabuf *	buf,
		size_t	len
	)			[read]

Pad buffer with 0x00 octets (prefix) to specified length.

Parameters:

	buf	Buffer to be padded
	len	Length for the padded buffer

Returns:

wpabuf padded to len octets or NULL on failure

If buf is longer than len octets or of same size, it will be returned as-is. Otherwise a new buffer is allocated and prefixed with 0x00 octets followed by the source data. The source buffer will be freed on error, i.e., caller will only be responsible on freeing the returned buffer. If buf is NULL, NULL will be returned.

Definition at line 182 of file wpabuf.c.

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