HTTP/2 (RFC 7540) wire framing and HPACK (RFC 7541) header compression. More...

#include "nilorea/n_http2.h"
#include <stdlib.h>
#include <string.h>

Include dependency graph for n_http2.c:

Data Structures
struct	H2_DYN_ENTRY
	one HPACK dynamic table entry (owned strings and its accounted size) More...

struct	N_H2_HPACK
	HPACK codec context: the dynamic table (index 0 = most recently added) More...

Functions
static int	hpack_dyn_add (N_H2_HPACK ctx, const char name, const char *value)
	insert (name, value) at the front of the dynamic table, evicting as needed; both strings are copied.

static void	hpack_evict (N_H2_HPACK *ctx)
	drop the oldest dynamic entries until the table fits max_size

static int	hpack_huff_decode (const unsigned char s, size_t len, char *out)
	decode a Huffman-coded string of len bytes into a fresh C string

static int	hpack_huff_lookup (uint32_t code, int nbits)
	find the Huffman symbol for an accumulated code of nbits bits, or -1

static int	hpack_int_decode (const unsigned char buf, size_t len, size_t pos, int prefix_bits, uint64_t *out)
	decode an HPACK integer with an N-bit prefix; advances *pos

static size_t	hpack_int_encode (unsigned char *out, size_t cap, int prefix_bits, unsigned char flags, uint64_t value)
	encode an HPACK integer with an N-bit prefix and high-bit flags

static int	hpack_lookup (const N_H2_HPACK ctx, uint64_t idx, const char name, const char *value)
	resolve a table index to its name/value (const, not owned).

static int	hpack_str_decode (const unsigned char buf, size_t len, size_t pos, char **out)
	decode an HPACK string (Huffman or literal); allocates *out

static size_t	hpack_str_encode (unsigned char out, size_t cap, const char s)
	encode a literal (non-Huffman) string with its 7-bit length prefix

size_t	n_http2_frame_build_header (unsigned char *out, size_t out_cap, uint32_t length, int type, int flags, uint32_t stream_id)
	write a 9-byte HTTP/2 frame header into out.

int	n_http2_frame_parse (const unsigned char buf, size_t len, N_H2_FRAME frame, size_t *consumed)
	parse one HTTP/2 frame from a byte buffer (stateless).

int	n_http2_hpack_decode (N_H2_HPACK ctx, const unsigned char block, size_t len, N_H2_HEADER out, size_t max_out, size_t count)
	decode an HPACK header block into out[] (owned name/value strings).

size_t	n_http2_hpack_encode (const N_H2_HEADER headers, size_t n, unsigned char out, size_t out_cap)
	encode a header list into a block using literal representations without indexing and without Huffman (a valid, interoperable, self-contained encoding that needs no dynamic-table state).

void	n_http2_hpack_free (N_H2_HPACK **pctx)
	free an HPACK codec context and NULL the caller's pointer

void	n_http2_hpack_headers_free (N_H2_HEADER *headers, size_t n)
	free the owned name/value strings of a decoded header array (does not free the array itself)

N_H2_HPACK *	n_http2_hpack_new (size_t max_table_size)
	create an HPACK codec context with the given dynamic table size limit (0 uses N_H2_HPACK_DEFAULT_TABLE_SIZE).

void	n_http2_hpack_set_max_size (N_H2_HPACK *ctx, size_t max_table_size)
	change the dynamic table size limit (a SETTINGS_HEADER_TABLE_SIZE change), evicting entries as needed so the table fits.

int	n_http2_settings_parse (const unsigned char payload, size_t len, N_H2_SETTING out, size_t max, size_t *count)
	parse a SETTINGS frame payload (6-byte id/value entries) into out.

Variables
static const uint32_t	hpack_huff_code [256]
	HPACK Huffman codes (RFC 7541 Appendix B), index = byte value 0..255.

static const uint8_t	hpack_huff_len [256]
	HPACK Huffman code lengths in bits (RFC 7541 Appendix B)

static const char *const	hpack_static_name [61]
	HPACK static table names (RFC 7541 Appendix A, index 1..61)

static const char *const	hpack_static_value [61]
	HPACK static table values (empty where the entry has no value)

Detailed Description

HTTP/2 (RFC 7540) wire framing and HPACK (RFC 7541) header compression.

Author: Castagnier Mickael

Version: 1.0

Definition in file n_http2.c.

Data Structure Documentation

◆ H2_DYN_ENTRY

struct H2_DYN_ENTRY

one HPACK dynamic table entry (owned strings and its accounted size)

Definition at line 175 of file n_http2.c.

Collaboration diagram for H2_DYN_ENTRY:

Data Fields
char *	name
size_t	size
char *	value

◆ N_H2_HPACK

struct N_H2_HPACK

HPACK codec context: the dynamic table (index 0 = most recently added)

opaque HPACK codec context holding one direction's dynamic table (RFC 7541)

Examples: ex_http2.c.

Definition at line 182 of file n_http2.c.

Collaboration diagram for N_H2_HPACK:

Data Fields
size_t	cap
size_t	cur_size
H2_DYN_ENTRY *	ents
size_t	limit
size_t	max_size
size_t	nents

Function Documentation

◆ hpack_dyn_add()

static int hpack_dyn_add	(	N_H2_HPACK *	ctx,
		const char *	name,
		const char *	value
	)

static

insert (name, value) at the front of the dynamic table, evicting as needed; both strings are copied.

An entry larger than max_size empties the table without being stored (RFC 7541 4.4).

Definition at line 402 of file n_http2.c.

References N_H2_HPACK::cap, N_H2_HPACK::cur_size, N_H2_HPACK::ents, hpack_evict(), N_H2_HPACK::max_size, H2_DYN_ENTRY::name, N_H2_HPACK::nents, H2_DYN_ENTRY::size, and H2_DYN_ENTRY::value.

Referenced by n_http2_hpack_decode().

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◆ hpack_evict()

static void hpack_evict ( N_H2_HPACK * ctx )

static

drop the oldest dynamic entries until the table fits max_size

Definition at line 365 of file n_http2.c.

References N_H2_HPACK::cur_size, N_H2_HPACK::ents, N_H2_HPACK::max_size, H2_DYN_ENTRY::name, N_H2_HPACK::nents, H2_DYN_ENTRY::size, and H2_DYN_ENTRY::value.

Referenced by hpack_dyn_add(), n_http2_hpack_decode(), and n_http2_hpack_set_max_size().

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◆ hpack_huff_decode()

static int hpack_huff_decode	(	const unsigned char *	s,
		size_t	len,
		char **	out
	)

static

decode a Huffman-coded string of len bytes into a fresh C string

Definition at line 202 of file n_http2.c.

References hpack_huff_lookup().

Referenced by hpack_str_decode().

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◆ hpack_huff_lookup()

static int hpack_huff_lookup	(	uint32_t	code,
		int	nbits
	)

static

find the Huffman symbol for an accumulated code of nbits bits, or -1

Definition at line 192 of file n_http2.c.

References hpack_huff_code, and hpack_huff_len.

Referenced by hpack_huff_decode().

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◆ hpack_int_decode()

static int hpack_int_decode	(	const unsigned char *	buf,
		size_t	len,
		size_t *	pos,
		int	prefix_bits,
		uint64_t *	out
	)

static

decode an HPACK integer with an N-bit prefix; advances *pos

Definition at line 257 of file n_http2.c.

Referenced by hpack_str_decode(), and n_http2_hpack_decode().

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◆ hpack_int_encode()

static size_t hpack_int_encode	(	unsigned char *	out,
		size_t	cap,
		int	prefix_bits,
		unsigned char	flags,
		uint64_t	value
	)

static

encode an HPACK integer with an N-bit prefix and high-bit flags

Definition at line 315 of file n_http2.c.

Referenced by hpack_str_encode().

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◆ hpack_lookup()

static int hpack_lookup	(	const N_H2_HPACK *	ctx,
		uint64_t	idx,
		const char **	name,
		const char **	value
	)

static

resolve a table index to its name/value (const, not owned).

Returns 0 on success, -1 when the index is out of range.

Definition at line 444 of file n_http2.c.

References N_H2_HPACK::ents, hpack_static_name, hpack_static_value, H2_DYN_ENTRY::name, N_H2_HPACK::nents, and H2_DYN_ENTRY::value.

Referenced by n_http2_hpack_decode().

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◆ hpack_str_decode()

static int hpack_str_decode	(	const unsigned char *	buf,
		size_t	len,
		size_t *	pos,
		char **	out
	)

static

decode an HPACK string (Huffman or literal); allocates *out

Definition at line 287 of file n_http2.c.

References hpack_huff_decode(), and hpack_int_decode().

Referenced by n_http2_hpack_decode().

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◆ hpack_str_encode()

static size_t hpack_str_encode	(	unsigned char *	out,
		size_t	cap,
		const char *	s
	)

static

encode a literal (non-Huffman) string with its 7-bit length prefix

Definition at line 341 of file n_http2.c.

References hpack_int_encode().

Referenced by n_http2_hpack_encode().

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◆ n_http2_frame_build_header()

size_t n_http2_frame_build_header	(	unsigned char *	out,
		size_t	out_cap,
		uint32_t	length,
		int	type,
		int	flags,
		uint32_t	stream_id
	)

write a 9-byte HTTP/2 frame header into out.

Returns N_H2_FRAME_HEADER_LEN, or 0 when out_cap is too small or length exceeds 24 bits.

Examples: ex_http2.c.

Definition at line 52 of file n_http2.c.

References N_H2_FRAME_HEADER_LEN.

Referenced by test_boundaries(), and test_roundtrip().

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◆ n_http2_frame_parse()

int n_http2_frame_parse	(	const unsigned char *	buf,
		size_t	len,
		N_H2_FRAME *	frame,
		size_t *	consumed
	)

parse one HTTP/2 frame from a byte buffer (stateless).

Returns 1 and fills frame + *consumed (header + payload) on a complete frame, 0 when more bytes are needed, -1 when the payload exceeds N_H2_MAX_FRAME_PAYLOAD.

Examples: ex_http2.c.

Definition at line 32 of file n_http2.c.

References N_H2_FRAME::flags, N_H2_FRAME::length, N_H2_FRAME_HEADER_LEN, N_H2_MAX_FRAME_PAYLOAD, N_H2_FRAME::payload, N_H2_FRAME::stream_id, and N_H2_FRAME::type.

Referenced by test_boundaries(), and test_roundtrip().

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◆ n_http2_hpack_decode()

int n_http2_hpack_decode	(	N_H2_HPACK *	ctx,
		const unsigned char *	block,
		size_t	len,
		N_H2_HEADER *	out,
		size_t	max_out,
		size_t *	count
	)

decode an HPACK header block into out[] (owned name/value strings).

Handles indexed fields (static and dynamic table), the three literal forms (with/without/never indexing), Huffman-coded and literal strings, and dynamic table size updates. On success *count holds the number of headers written (<= max_out) and the dynamic table is updated. Returns 0 on success, -1 on a malformed block or when more than max_out headers are produced. Free the decoded headers with n_http2_hpack_headers_free.

Parameters

ctx	codec context (its dynamic table is read and updated)
block	the header block fragment bytes
len	length of block
out	array receiving the decoded headers
max_out	capacity of out
count	receives the number of headers decoded

Returns: 0 on success, -1 on error

Examples: ex_http2.c.

Definition at line 472 of file n_http2.c.

References hpack_dyn_add(), hpack_evict(), hpack_int_decode(), hpack_lookup(), hpack_str_decode(), N_H2_HPACK::limit, N_H2_HPACK::max_size, n_http2_hpack_headers_free(), N_H2_HEADER::name, and N_H2_HEADER::value.

Referenced by test_hpack_guards(), test_hpack_overflow(), test_hpack_rfc_huffman(), test_hpack_rfc_requests(), and test_hpack_roundtrip().

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◆ n_http2_hpack_encode()

size_t n_http2_hpack_encode	(	const N_H2_HEADER *	headers,
		size_t	n,
		unsigned char *	out,
		size_t	out_cap
	)

encode a header list into a block using literal representations without indexing and without Huffman (a valid, interoperable, self-contained encoding that needs no dynamic-table state).

Returns the number of bytes written, or 0 when out_cap is too small or an argument is invalid.

Parameters

headers	the header fields to encode (name/value C strings)
n	number of headers
out	destination buffer
out_cap	capacity of out

Returns: bytes written, or 0 on error

Examples: ex_http2.c.

Definition at line 554 of file n_http2.c.

References hpack_str_encode().

Referenced by test_hpack_roundtrip().

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◆ n_http2_hpack_free()

void n_http2_hpack_free ( N_H2_HPACK ** pctx )

free an HPACK codec context and NULL the caller's pointer

Examples: ex_http2.c.

Definition at line 375 of file n_http2.c.

References N_H2_HPACK::ents, H2_DYN_ENTRY::name, N_H2_HPACK::nents, and H2_DYN_ENTRY::value.

Referenced by test_hpack_guards(), test_hpack_overflow(), test_hpack_rfc_huffman(), test_hpack_rfc_requests(), and test_hpack_roundtrip().

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◆ n_http2_hpack_headers_free()

void n_http2_hpack_headers_free	(	N_H2_HEADER *	headers,
		size_t	n
	)

free the owned name/value strings of a decoded header array (does not free the array itself)

Examples: ex_http2.c.

Definition at line 460 of file n_http2.c.

References N_H2_HEADER::name, and N_H2_HEADER::value.

Referenced by n_http2_hpack_decode(), test_hpack_rfc_huffman(), test_hpack_rfc_requests(), and test_hpack_roundtrip().

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◆ n_http2_hpack_new()

N_H2_HPACK * n_http2_hpack_new ( size_t max_table_size )

create an HPACK codec context with the given dynamic table size limit (0 uses N_H2_HPACK_DEFAULT_TABLE_SIZE).

Returns NULL on allocation failure.

Examples: ex_http2.c.

Definition at line 353 of file n_http2.c.

References N_H2_HPACK::limit, N_H2_HPACK::max_size, and N_H2_HPACK_DEFAULT_TABLE_SIZE.

Referenced by test_hpack_guards(), test_hpack_overflow(), test_hpack_rfc_huffman(), test_hpack_rfc_requests(), and test_hpack_roundtrip().

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◆ n_http2_hpack_set_max_size()

void n_http2_hpack_set_max_size	(	N_H2_HPACK *	ctx,
		size_t	max_table_size
	)

change the dynamic table size limit (a SETTINGS_HEADER_TABLE_SIZE change), evicting entries as needed so the table fits.

Definition at line 390 of file n_http2.c.

References hpack_evict(), N_H2_HPACK::limit, and N_H2_HPACK::max_size.

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◆ n_http2_settings_parse()

int n_http2_settings_parse	(	const unsigned char *	payload,
		size_t	len,
		N_H2_SETTING *	out,
		size_t	max,
		size_t *	count
	)

parse a SETTINGS frame payload (6-byte id/value entries) into out.

Returns 0 on success (*count set, <= max), -1 when the payload length is not a multiple of 6.

Examples: ex_http2.c.

Definition at line 70 of file n_http2.c.

References N_H2_SETTING::id, and N_H2_SETTING::value.

Referenced by test_settings().

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Variable Documentation

◆ hpack_huff_code

const uint32_t hpack_huff_code[256]

static

Initial value:

= {
    0x1ff8, 0x7fffd8, 0xfffffe2, 0xfffffe3, 0xfffffe4, 0xfffffe5, 0xfffffe6, 0xfffffe7,
    0xfffffe8, 0xffffea, 0x3ffffffc, 0xfffffe9, 0xfffffea, 0x3ffffffd, 0xfffffeb, 0xfffffec,
    0xfffffed, 0xfffffee, 0xfffffef, 0xffffff0, 0xffffff1, 0xffffff2, 0x3ffffffe, 0xffffff3,
    0xffffff4, 0xffffff5, 0xffffff6, 0xffffff7, 0xffffff8, 0xffffff9, 0xffffffa, 0xffffffb,
    0x14, 0x3f8, 0x3f9, 0xffa, 0x1ff9, 0x15, 0xf8, 0x7fa,
    0x3fa, 0x3fb, 0xf9, 0x7fb, 0xfa, 0x16, 0x17, 0x18,
    0x0, 0x1, 0x2, 0x19, 0x1a, 0x1b, 0x1c, 0x1d,
    0x1e, 0x1f, 0x5c, 0xfb, 0x7ffc, 0x20, 0xffb, 0x3fc,
    0x1ffa, 0x21, 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62,
    0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a,
    0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72,
    0xfc, 0x73, 0xfd, 0x1ffb, 0x7fff0, 0x1ffc, 0x3ffc, 0x22,
    0x7ffd, 0x3, 0x23, 0x4, 0x24, 0x5, 0x25, 0x26,
    0x27, 0x6, 0x74, 0x75, 0x28, 0x29, 0x2a, 0x7,
    0x2b, 0x76, 0x2c, 0x8, 0x9, 0x2d, 0x77, 0x78,
    0x79, 0x7a, 0x7b, 0x7ffe, 0x7fc, 0x3ffd, 0x1ffd, 0xffffffc,
    0xfffe6, 0x3fffd2, 0xfffe7, 0xfffe8, 0x3fffd3, 0x3fffd4, 0x3fffd5, 0x7fffd9,
    0x3fffd6, 0x7fffda, 0x7fffdb, 0x7fffdc, 0x7fffdd, 0x7fffde, 0xffffeb, 0x7fffdf,
    0xffffec, 0xffffed, 0x3fffd7, 0x7fffe0, 0xffffee, 0x7fffe1, 0x7fffe2, 0x7fffe3,
    0x7fffe4, 0x1fffdc, 0x3fffd8, 0x7fffe5, 0x3fffd9, 0x7fffe6, 0x7fffe7, 0xffffef,
    0x3fffda, 0x1fffdd, 0xfffe9, 0x3fffdb, 0x3fffdc, 0x7fffe8, 0x7fffe9, 0x1fffde,
    0x7fffea, 0x3fffdd, 0x3fffde, 0xfffff0, 0x1fffdf, 0x3fffdf, 0x7fffeb, 0x7fffec,
    0x1fffe0, 0x1fffe1, 0x3fffe0, 0x1fffe2, 0x7fffed, 0x3fffe1, 0x7fffee, 0x7fffef,
    0xfffea, 0x3fffe2, 0x3fffe3, 0x3fffe4, 0x7ffff0, 0x3fffe5, 0x3fffe6, 0x7ffff1,
    0x3ffffe0, 0x3ffffe1, 0xfffeb, 0x7fff1, 0x3fffe7, 0x7ffff2, 0x3fffe8, 0x1ffffec,
    0x3ffffe2, 0x3ffffe3, 0x3ffffe4, 0x7ffffde, 0x7ffffdf, 0x3ffffe5, 0xfffff1, 0x1ffffed,
    0x7fff2, 0x1fffe3, 0x3ffffe6, 0x7ffffe0, 0x7ffffe1, 0x3ffffe7, 0x7ffffe2, 0xfffff2,
    0x1fffe4, 0x1fffe5, 0x3ffffe8, 0x3ffffe9, 0xffffffd, 0x7ffffe3, 0x7ffffe4, 0x7ffffe5,
    0xfffec, 0xfffff3, 0xfffed, 0x1fffe6, 0x3fffe9, 0x1fffe7, 0x1fffe8, 0x7ffff3,
    0x3fffea, 0x3fffeb, 0x1ffffee, 0x1ffffef, 0xfffff4, 0xfffff5, 0x3ffffea, 0x7ffff4,
    0x3ffffeb, 0x7ffffe6, 0x3ffffec, 0x3ffffed, 0x7ffffe7, 0x7ffffe8, 0x7ffffe9, 0x7ffffea,
    0x7ffffeb, 0xffffffe, 0x7ffffec, 0x7ffffed, 0x7ffffee, 0x7ffffef, 0x7fffff0, 0x3ffffee}

HPACK Huffman codes (RFC 7541 Appendix B), index = byte value 0..255.

Definition at line 121 of file n_http2.c.

Referenced by hpack_huff_lookup().

◆ hpack_huff_len

const uint8_t hpack_huff_len[256]

static

Initial value:

= {
    13, 23, 28, 28, 28, 28, 28, 28, 28, 24, 30, 28, 28, 30, 28, 28,
    28, 28, 28, 28, 28, 28, 30, 28, 28, 28, 28, 28, 28, 28, 28, 28,
    6, 10, 10, 12, 13, 6, 8, 11, 10, 10, 8, 11, 8, 6, 6, 6,
    5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 7, 8, 15, 6, 12, 10,
    13, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
    7, 7, 7, 7, 7, 7, 7, 7, 8, 7, 8, 13, 19, 13, 14, 6,
    15, 5, 6, 5, 6, 5, 6, 6, 6, 5, 7, 7, 6, 6, 6, 5,
    6, 7, 6, 5, 5, 6, 7, 7, 7, 7, 7, 15, 11, 14, 13, 28,
    20, 22, 20, 20, 22, 22, 22, 23, 22, 23, 23, 23, 23, 23, 24, 23,
    24, 24, 22, 23, 24, 23, 23, 23, 23, 21, 22, 23, 22, 23, 23, 24,
    22, 21, 20, 22, 22, 23, 23, 21, 23, 22, 22, 24, 21, 22, 23, 23,
    21, 21, 22, 21, 23, 22, 23, 23, 20, 22, 22, 22, 23, 22, 22, 23,
    26, 26, 20, 19, 22, 23, 22, 25, 26, 26, 26, 27, 27, 26, 24, 25,
    19, 21, 26, 27, 27, 26, 27, 24, 21, 21, 26, 26, 28, 27, 27, 27,
    20, 24, 20, 21, 22, 21, 21, 23, 22, 22, 25, 25, 24, 24, 26, 23,
    26, 27, 26, 26, 27, 27, 27, 27, 27, 28, 27, 27, 27, 27, 27, 26}

HPACK Huffman code lengths in bits (RFC 7541 Appendix B)

Definition at line 156 of file n_http2.c.

Referenced by hpack_huff_lookup().

◆ hpack_static_name

const char* const hpack_static_name[61]

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"}

HPACK static table names (RFC 7541 Appendix A, index 1..61)

Definition at line 93 of file n_http2.c.

Referenced by hpack_lookup().

◆ hpack_static_value

const char* const hpack_static_value[61]

static

Initial value:

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

HPACK static table values (empty where the entry has no value)

Definition at line 107 of file n_http2.c.

Referenced by hpack_lookup().

Data Structures

Functions

Variables

Detailed Description

Data Structure Documentation

◆ H2_DYN_ENTRY

◆ N_H2_HPACK

Function Documentation

◆ hpack_dyn_add()

◆ hpack_evict()

◆ hpack_huff_decode()

◆ hpack_huff_lookup()

◆ hpack_int_decode()

◆ hpack_int_encode()

◆ hpack_lookup()

◆ hpack_str_decode()

◆ hpack_str_encode()

◆ n_http2_frame_build_header()

◆ n_http2_frame_parse()

◆ n_http2_hpack_decode()

◆ n_http2_hpack_encode()

◆ n_http2_hpack_free()

◆ n_http2_hpack_headers_free()

◆ n_http2_hpack_new()

◆ n_http2_hpack_set_max_size()

◆ n_http2_settings_parse()

Variable Documentation

◆ hpack_huff_code

◆ hpack_huff_len

◆ hpack_static_name

◆ hpack_static_value