table of contents
TLV(3) | Library Functions Manual | TLV(3) |
NAME¶
tlv_encode
,
tlv_decode
—
TLV Manipulation Functions
LIBRARY¶
Mifare card manipulation library (libfreefare, -lfreefare)SYNOPSIS¶
#include
<freefare.h>
uint8_t *
tlv_encode
(const
uint8_t type,
const uint8_t
*istream,
uint16_t isize,
size_t *osize);
uint8_t *
tlv_decode
(const
uint8_t *istream,
uint8_t *type,
uint16_t *size);
DESCRIPTION¶
Thetlv_encode
() and
tlv_decode
() functions are helpers to
manipulate TLV (Text-Length-Value) data.
The tlv_encode
() function converts the
isize bytes long
istream message into a TLV stream of type
type and set the value of
osize to the length of the returned stream.
The tlv_decode
() function converts the
istream TLV stream and set the
type argument according to the type of the
stream, and set the size argument to the
length of the returned stream.
RETURN VALUES¶
Both functions return memory allocated using malloc(3) which should be reclaimed using free(3) after usage.SEE ALSO¶
freefare(3), malloc(3), free(3)AUTHORS¶
Romain Tartiere ⟨romain@blogreen.org⟩Romuald Conty ⟨romuald@libnfc.org⟩
March 30, 2010 | Debian |