hpack.c File Reference

Include dependency graph for hpack.c:

Data Structures
struct	hpack_decoder

Functions
struct hpack_decoder *	hpack_decode_init (size_t header_table_size)
void	hpack_decode_destroy (struct hpack_decoder *dec)
static int_fast32_t	hpack_decode_int (unsigned n, const uint8_t **restrict datap, size_t *restrict lengthp)
	Decodes an HPACK unsigned variable length integer.
static char *	hpack_decode_str_raw (const uint8_t *data, size_t length)
	Decodes a raw string literal.
static int	hpack_decode_byte_huffman (const uint8_t *restrict end, int *restrict bit_offset)
static char *	hpack_decode_str_huffman (const uint8_t *data, size_t length)
	Decodes an Huffman-encoded string literal.
static char *	hpack_decode_str (const uint8_t **restrict datap, size_t *restrict lengthp)
	Decodes a string literal.
static char *	hpack_lookup_name (const struct hpack_decoder *dec, uint_fast32_t idx)
static char *	hpack_lookup_value (const struct hpack_decoder *dec, uint_fast32_t idx)
static void	hpack_decode_evict (struct hpack_decoder *dec)
static int	hpack_append_hdr (struct hpack_decoder *dec, const char *name, const char *value)
static int	hpack_decode_hdr_indexed (struct hpack_decoder *dec, const uint8_t **restrict datap, size_t *restrict lengthp, char **restrict namep, char **restrict valuep)
static int	hpack_decode_hdr_index (struct hpack_decoder *dec, const uint8_t **restrict datap, size_t *restrict lengthp, char **restrict namep, char **restrict valuep)
static int	hpack_decode_hdr_noindex (struct hpack_decoder *dec, const uint8_t **restrict datap, size_t *restrict lengthp, char **restrict namep, char **restrict valuep)
static int	hpack_decode_tbl_update (struct hpack_decoder *dec, const uint8_t **restrict datap, size_t *restrict lengthp, char **restrict name, char **restrict value)
static int	hpack_decode_hdr (struct hpack_decoder *dec, const uint8_t **restrict datap, size_t *restrict lengthp, char **restrict namep, char **restrict valuep)
int	hpack_decode (struct hpack_decoder *dec, const uint8_t *data, size_t length, char *headers[][2], unsigned max)

Variables
static const char	hpack_names [][28]
	Static Table header names.
static const char	hpack_values [][14]
	Static Table header values.

Function Documentation

hpack_append_hdr()

static int hpack_append_hdr ( struct hpack_decoder *  dec, const char *  name, const char *  value  )

static

References hpack_decoder::entries, hpack_decode_evict(), name, hpack_decoder::size, and hpack_decoder::table.

Referenced by hpack_decode_hdr_index().

hpack_decode_byte_huffman()

static int hpack_decode_byte_huffman ( const uint8_t *restrict  end, int *restrict  bit_offset  )

static

References p.

Referenced by hpack_decode_str_huffman().

hpack_decode_evict()

static void hpack_decode_evict ( struct hpack_decoder *  dec )

static

References hpack_decoder::entries, hpack_decoder::max_size, hpack_decoder::size, and hpack_decoder::table.

Referenced by hpack_append_hdr(), and hpack_decode_tbl_update().

hpack_decode_hdr()

static int hpack_decode_hdr ( struct hpack_decoder *  dec, const uint8_t **restrict  datap, size_t *restrict  lengthp, char **restrict  namep, char **restrict  valuep  )

static

References hpack_decode_hdr_index(), hpack_decode_hdr_indexed(), hpack_decode_hdr_noindex(), and hpack_decode_tbl_update().

Referenced by hpack_decode().

hpack_decode_hdr_index()

static int hpack_decode_hdr_index ( struct hpack_decoder *  dec, const uint8_t **restrict  datap, size_t *restrict  lengthp, char **restrict  namep, char **restrict  valuep  )

static

References hpack_append_hdr(), hpack_decode_int(), hpack_decode_str(), hpack_lookup_name(), and name.

Referenced by hpack_decode_hdr().

hpack_decode_hdr_indexed()

static int hpack_decode_hdr_indexed ( struct hpack_decoder *  dec, const uint8_t **restrict  datap, size_t *restrict  lengthp, char **restrict  namep, char **restrict  valuep  )

static

References hpack_decode_int(), hpack_lookup_name(), hpack_lookup_value(), and name.

Referenced by hpack_decode_hdr().

hpack_decode_hdr_noindex()

static int hpack_decode_hdr_noindex ( struct hpack_decoder *  dec, const uint8_t **restrict  datap, size_t *restrict  lengthp, char **restrict  namep, char **restrict  valuep  )

static

References hpack_decode_int(), hpack_decode_str(), hpack_lookup_name(), and name.

Referenced by hpack_decode_hdr().

hpack_decode_int()

static int_fast32_t hpack_decode_int ( unsigned  n, const uint8_t **restrict  datap, size_t *restrict  lengthp  )

static

Decodes an HPACK unsigned variable length integer.

Returns

the value on success, -1 on error (and sets errno).

References p.

Referenced by hpack_decode_hdr_index(), hpack_decode_hdr_indexed(), hpack_decode_hdr_noindex(), hpack_decode_str(), and hpack_decode_tbl_update().

hpack_decode_str()

static char * hpack_decode_str ( const uint8_t **restrict  datap, size_t *restrict  lengthp  )

static

Decodes a string literal.

Returns

a heap-allocated nul-terminated string success, NULL on error (and sets errno).

References hpack_decode_int(), hpack_decode_str_huffman(), and hpack_decode_str_raw().

Referenced by hpack_decode_hdr_index(), and hpack_decode_hdr_noindex().

hpack_decode_str_huffman()

static char * hpack_decode_str_huffman ( const uint8_t *  data, size_t  length  )

static

Decodes an Huffman-encoded string literal.

References hpack_decode_byte_huffman().

Referenced by hpack_decode_str().

hpack_decode_str_raw()

static char * hpack_decode_str_raw ( const uint8_t *  data, size_t  length  )

static

Decodes a raw string literal.

Referenced by hpack_decode_str().

hpack_decode_tbl_update()

static int hpack_decode_tbl_update ( struct hpack_decoder *  dec, const uint8_t **restrict  datap, size_t *restrict  lengthp, char **restrict  name, char **restrict  value  )

static

References hpack_decode_evict(), hpack_decode_int(), hpack_decoder::max_size, and name.

Referenced by hpack_decode_hdr().

hpack_lookup_name()

static char * hpack_lookup_name ( const struct hpack_decoder *  dec, uint_fast32_t  idx  )

static

References hpack_decoder::entries, hpack_names, strdup(), and hpack_decoder::table.

Referenced by hpack_decode_hdr_index(), hpack_decode_hdr_indexed(), and hpack_decode_hdr_noindex().

hpack_lookup_value()

static char * hpack_lookup_value ( const struct hpack_decoder *  dec, uint_fast32_t  idx  )

static

References hpack_decoder::entries, hpack_names, hpack_values, strdup(), and hpack_decoder::table.

Referenced by hpack_decode_hdr_indexed().

Variable Documentation

hpack_names

const char hpack_names[][28]

static

Initial value:

=
{
    ":authority", ":method", ":method", ":path", ":path", ":scheme", ":scheme",
    ":status", ":status", ":status", ":status", ":status", ":status",
    ":status", "accept-charset", "accept-encoding", "accept-language",
    "accept-ranges", "accept", "access-control-allow-origin", "age", "allow",
    "authorization", "cache-control", "content-disposition",
    "content-encoding", "content-language", "content-length",
    "content-location", "content-range", "content-type", "cookie", "date",
    "etag", "expect", "expires", "from", "host", "if-match",
    "if-modified-since", "if-none-match", "if-range", "if-unmodified-since",
    "last-modified", "link", "location", "max-forwards", "proxy-authenticate",
    "proxy-authorization", "range", "referer", "refresh", "retry-after",
    "server", "set-cookie", "strict-transport-security", "transfer-encoding",
    "user-agent", "vary", "via", "www-authenticate",
}

Static Table header names.

Referenced by hpack_lookup_name(), and hpack_lookup_value().

hpack_values

const char hpack_values[][14]

static

Initial value:

=
{
    "", "GET", "POST", "/", "/index.html", "http", "https", "200", "204",
    "206", "304", "400", "404", "500", "", "gzip, deflate"
}

Static Table header values.

Referenced by hpack_lookup_value().