diff options
| author |  Craig Tiller <ctiller@google.com> | 2016-03-28 10:13:08 -0700 |
|---|---|---|
| committer | Craig Tiller <ctiller@google.com> | 2016-03-28 10:13:08 -0700 |
| commit | c7762a8c24e786be37e9e86a518a1d4fcb9d2133 (patch) | |
| tree | a81469bd9a38ddb9792539f2da1af7b9a7abb922 /src/core/lib/transport/chttp2/hpack_parser.c | |
| parent | 77c5dc6e72e06816428bc84fd4a1862571debecc (diff) | |
Move chttp2 related files under ext/
Diffstat (limited to 'src/core/lib/transport/chttp2/hpack_parser.c')
| -rw-r--r-- | src/core/lib/transport/chttp2/hpack_parser.c | 1449 |
1 files changed, 0 insertions, 1449 deletions
diff --git a/src/core/lib/transport/chttp2/hpack_parser.c b/src/core/lib/transport/chttp2/hpack_parser.c deleted file mode 100644 index d41ebab147..0000000000 --- a/src/core/lib/transport/chttp2/hpack_parser.c +++ /dev/null @@ -1,1449 +0,0 @@ -/* - * - * Copyright 2015-2016, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -#include "src/core/lib/transport/chttp2/hpack_parser.h" -#include "src/core/lib/transport/chttp2/internal.h" - -#include <assert.h> -#include <stddef.h> -#include <string.h> - -/* This is here for grpc_is_binary_header - * TODO(murgatroid99): Remove this - */ -#include <grpc/grpc.h> - -#include <grpc/support/alloc.h> -#include <grpc/support/log.h> -#include <grpc/support/port_platform.h> -#include <grpc/support/useful.h> - -#include "src/core/lib/profiling/timers.h" -#include "src/core/lib/support/string.h" -#include "src/core/lib/transport/chttp2/bin_encoder.h" - -typedef enum { - NOT_BINARY, - B64_BYTE0, - B64_BYTE1, - B64_BYTE2, - B64_BYTE3 -} binary_state; - -/* How parsing works: - - The parser object keeps track of a function pointer which represents the - current parse state. - - Each time new bytes are presented, we call into the current state, which - recursively parses until all bytes in the given chunk are exhausted. - - The parse state that terminates then saves its function pointer to be the - current state so that it can resume when more bytes are available. - - It's expected that most optimizing compilers will turn this code into - a set of indirect jumps, and so not waste stack space. */ - -/* forward declarations for parsing states */ -static int parse_begin(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end); -static int parse_error(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end); -static int parse_illegal_op(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end); - -static int parse_string_prefix(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end); -static int parse_key_string(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end); -static int parse_value_string_with_indexed_key(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, - const uint8_t *end); -static int parse_value_string_with_literal_key(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, - const uint8_t *end); - -static int parse_value0(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end); -static int parse_value1(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end); -static int parse_value2(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end); -static int parse_value3(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end); -static int parse_value4(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end); -static int parse_value5up(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end); - -static int parse_indexed_field(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end); -static int parse_indexed_field_x(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, const uint8_t *end); -static int parse_lithdr_incidx(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end); -static int parse_lithdr_incidx_x(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, const uint8_t *end); -static int parse_lithdr_incidx_v(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, const uint8_t *end); -static int parse_lithdr_notidx(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end); -static int parse_lithdr_notidx_x(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, const uint8_t *end); -static int parse_lithdr_notidx_v(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, const uint8_t *end); -static int parse_lithdr_nvridx(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end); -static int parse_lithdr_nvridx_x(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, const uint8_t *end); -static int parse_lithdr_nvridx_v(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, const uint8_t *end); -static int parse_max_tbl_size(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end); -static int parse_max_tbl_size_x(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end); - -/* we translate the first byte of a hpack field into one of these decoding - cases, then use a lookup table to jump directly to the appropriate parser. - - _X => the integer index is all ones, meaning we need to do varint decoding - _V => the integer index is all zeros, meaning we need to decode an additional - string value */ -typedef enum { - INDEXED_FIELD, - INDEXED_FIELD_X, - LITHDR_INCIDX, - LITHDR_INCIDX_X, - LITHDR_INCIDX_V, - LITHDR_NOTIDX, - LITHDR_NOTIDX_X, - LITHDR_NOTIDX_V, - LITHDR_NVRIDX, - LITHDR_NVRIDX_X, - LITHDR_NVRIDX_V, - MAX_TBL_SIZE, - MAX_TBL_SIZE_X, - ILLEGAL -} first_byte_type; - -/* jump table of parse state functions -- order must match first_byte_type - above */ -static const grpc_chttp2_hpack_parser_state first_byte_action[] = { - parse_indexed_field, parse_indexed_field_x, parse_lithdr_incidx, - parse_lithdr_incidx_x, parse_lithdr_incidx_v, parse_lithdr_notidx, - parse_lithdr_notidx_x, parse_lithdr_notidx_v, parse_lithdr_nvridx, - parse_lithdr_nvridx_x, parse_lithdr_nvridx_v, parse_max_tbl_size, - parse_max_tbl_size_x, parse_illegal_op}; - -/* indexes the first byte to a parse state function - generated by - gen_hpack_tables.c */ -static const uint8_t first_byte_lut[256] = { - LITHDR_NOTIDX_V, LITHDR_NOTIDX, LITHDR_NOTIDX, LITHDR_NOTIDX, - LITHDR_NOTIDX, LITHDR_NOTIDX, LITHDR_NOTIDX, LITHDR_NOTIDX, - LITHDR_NOTIDX, LITHDR_NOTIDX, LITHDR_NOTIDX, LITHDR_NOTIDX, - LITHDR_NOTIDX, LITHDR_NOTIDX, LITHDR_NOTIDX, LITHDR_NOTIDX_X, - LITHDR_NVRIDX_V, LITHDR_NVRIDX, LITHDR_NVRIDX, LITHDR_NVRIDX, - LITHDR_NVRIDX, LITHDR_NVRIDX, LITHDR_NVRIDX, LITHDR_NVRIDX, - LITHDR_NVRIDX, LITHDR_NVRIDX, LITHDR_NVRIDX, LITHDR_NVRIDX, - LITHDR_NVRIDX, LITHDR_NVRIDX, LITHDR_NVRIDX, LITHDR_NVRIDX_X, - MAX_TBL_SIZE, MAX_TBL_SIZE, MAX_TBL_SIZE, MAX_TBL_SIZE, - MAX_TBL_SIZE, MAX_TBL_SIZE, MAX_TBL_SIZE, MAX_TBL_SIZE, - MAX_TBL_SIZE, MAX_TBL_SIZE, MAX_TBL_SIZE, MAX_TBL_SIZE, - MAX_TBL_SIZE, MAX_TBL_SIZE, MAX_TBL_SIZE, MAX_TBL_SIZE, - MAX_TBL_SIZE, MAX_TBL_SIZE, MAX_TBL_SIZE, MAX_TBL_SIZE, - MAX_TBL_SIZE, MAX_TBL_SIZE, MAX_TBL_SIZE, MAX_TBL_SIZE, - MAX_TBL_SIZE, MAX_TBL_SIZE, MAX_TBL_SIZE, MAX_TBL_SIZE, - MAX_TBL_SIZE, MAX_TBL_SIZE, MAX_TBL_SIZE, MAX_TBL_SIZE_X, - LITHDR_INCIDX_V, LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, - LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, - LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, - LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, - LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, - LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, - LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, - LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, - LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, - LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, - LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, - LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, - LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, - LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, - LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, - LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX, LITHDR_INCIDX_X, - ILLEGAL, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, - INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD, INDEXED_FIELD_X, -}; - -/* state table for huffman decoding: given a state, gives an index/16 into - next_sub_tbl. Taking that index and adding the value of the nibble being - considered returns the next state. - - generated by gen_hpack_tables.c */ -static const uint8_t next_tbl[256] = { - 0, 1, 2, 3, 4, 1, 2, 5, 6, 1, 7, 8, 1, 3, 3, 9, 10, 11, 1, 1, - 1, 12, 1, 2, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, - 14, 1, 15, 16, 1, 17, 1, 15, 2, 7, 3, 18, 19, 1, 1, 1, 1, 20, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 15, 2, 2, 7, 21, 1, 22, 1, 1, 1, 1, 1, - 1, 1, 1, 15, 2, 2, 2, 2, 2, 2, 23, 24, 25, 1, 1, 1, 1, 2, 2, 2, - 26, 3, 3, 27, 10, 28, 1, 1, 1, 1, 1, 1, 2, 3, 29, 10, 30, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 31, 1, 1, 1, 1, 1, 1, 1, 2, - 2, 2, 2, 2, 2, 2, 2, 32, 1, 1, 15, 33, 1, 34, 35, 9, 36, 1, 1, 1, - 1, 1, 1, 1, 37, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 26, 9, - 38, 1, 1, 1, 1, 1, 1, 1, 15, 2, 2, 2, 2, 26, 3, 3, 39, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 7, 3, 3, 3, 40, 2, - 41, 1, 1, 1, 42, 43, 1, 1, 44, 1, 1, 1, 1, 15, 2, 2, 2, 2, 2, 2, - 3, 3, 3, 45, 46, 1, 1, 2, 2, 2, 35, 3, 3, 18, 47, 2, -}; - -/* next state, based upon current state and the current nibble: see above. - generated by gen_hpack_tables.c */ -static const int16_t next_sub_tbl[48 * 16] = { - 1, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, - 218, 2, 6, 10, 13, 14, 15, 16, 17, 2, 6, 10, 13, 14, 15, - 16, 17, 3, 7, 11, 24, 3, 7, 11, 24, 3, 7, 11, 24, 3, - 7, 11, 24, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, - 4, 8, 4, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, - 199, 200, 201, 202, 203, 4, 8, 4, 8, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 9, 133, 134, 135, 136, 137, 138, 139, 140, - 141, 142, 143, 144, 145, 146, 147, 3, 7, 11, 24, 3, 7, 11, 24, - 4, 8, 4, 8, 4, 8, 4, 8, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 12, 132, 4, 8, 4, 8, 4, 8, - 4, 8, 4, 8, 4, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 18, 19, 20, 21, 4, 8, 4, - 8, 4, 8, 4, 8, 4, 8, 0, 0, 0, 22, 23, 91, 25, 26, - 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 3, - 7, 11, 24, 3, 7, 11, 24, 0, 0, 0, 0, 0, 41, 42, 43, - 2, 6, 10, 13, 14, 15, 16, 17, 3, 7, 11, 24, 3, 7, 11, - 24, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 0, 0, - 44, 45, 2, 6, 10, 13, 14, 15, 16, 17, 46, 47, 48, 49, 50, - 51, 52, 57, 4, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 53, 54, 55, 56, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, - 68, 69, 70, 71, 72, 74, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 73, 75, 76, 77, 78, 79, 80, 81, 82, - 83, 84, 85, 86, 87, 88, 89, 90, 3, 7, 11, 24, 3, 7, 11, - 24, 3, 7, 11, 24, 0, 0, 0, 0, 3, 7, 11, 24, 3, 7, - 11, 24, 4, 8, 4, 8, 0, 0, 0, 92, 0, 0, 0, 93, 94, - 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 3, 7, 11, 24, - 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, - 8, 4, 8, 4, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 4, - 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 0, 0, - 0, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, - 131, 2, 6, 10, 13, 14, 15, 16, 17, 4, 8, 4, 8, 4, 8, - 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 148, - 149, 150, 151, 3, 7, 11, 24, 4, 8, 4, 8, 0, 0, 0, 0, - 0, 0, 152, 153, 3, 7, 11, 24, 3, 7, 11, 24, 3, 7, 11, - 24, 154, 155, 156, 164, 3, 7, 11, 24, 3, 7, 11, 24, 3, 7, - 11, 24, 4, 8, 4, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 157, 158, 159, 160, 161, 162, 163, 165, 166, 167, 168, 169, 170, 171, 172, - 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, - 188, 189, 190, 191, 192, 193, 194, 195, 196, 4, 8, 4, 8, 4, 8, - 4, 8, 4, 8, 4, 8, 4, 8, 197, 198, 4, 8, 4, 8, 4, - 8, 4, 8, 0, 0, 0, 0, 0, 0, 219, 220, 3, 7, 11, 24, - 4, 8, 4, 8, 4, 8, 0, 0, 221, 222, 223, 224, 3, 7, 11, - 24, 3, 7, 11, 24, 4, 8, 4, 8, 4, 8, 225, 228, 4, 8, - 4, 8, 4, 8, 0, 0, 0, 0, 0, 0, 0, 0, 226, 227, 229, - 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, - 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 245, 246, 247, 248, 249, 250, 251, 252, - 253, 254, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 255, -}; - -/* emission table: indexed like next_tbl, ultimately gives the byte to be - emitted, or -1 for no byte, or 256 for end of stream - - generated by gen_hpack_tables.c */ -static const uint16_t emit_tbl[256] = { - 0, 1, 2, 3, 4, 5, 6, 7, 0, 8, 9, 10, 11, 12, 13, - 14, 15, 16, 17, 18, 19, 20, 21, 22, 0, 23, 24, 25, 26, 27, - 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, - 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 0, 55, 56, - 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 0, - 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, - 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, - 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, - 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, - 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, - 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 0, - 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, - 0, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, - 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, - 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, - 219, 220, 221, 0, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, - 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, - 248, -}; - -/* generated by gen_hpack_tables.c */ -static const int16_t emit_sub_tbl[249 * 16] = { - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, 48, 48, 48, 48, 48, 48, 48, 48, 49, 49, 49, 49, 49, 49, - 49, 49, 48, 48, 48, 48, 49, 49, 49, 49, 50, 50, 50, 50, 97, - 97, 97, 97, 48, 48, 49, 49, 50, 50, 97, 97, 99, 99, 101, 101, - 105, 105, 111, 111, 48, 49, 50, 97, 99, 101, 105, 111, 115, 116, -1, - -1, -1, -1, -1, -1, 32, 32, 32, 32, 32, 32, 32, 32, 37, 37, - 37, 37, 37, 37, 37, 37, 99, 99, 99, 99, 101, 101, 101, 101, 105, - 105, 105, 105, 111, 111, 111, 111, 115, 115, 116, 116, 32, 37, 45, 46, - 47, 51, 52, 53, 54, 55, 56, 57, 61, 61, 61, 61, 61, 61, 61, - 61, 65, 65, 65, 65, 65, 65, 65, 65, 115, 115, 115, 115, 116, 116, - 116, 116, 32, 32, 37, 37, 45, 45, 46, 46, 61, 65, 95, 98, 100, - 102, 103, 104, 108, 109, 110, 112, 114, 117, -1, -1, 58, 58, 58, 58, - 58, 58, 58, 58, 66, 66, 66, 66, 66, 66, 66, 66, 47, 47, 51, - 51, 52, 52, 53, 53, 54, 54, 55, 55, 56, 56, 57, 57, 61, 61, - 65, 65, 95, 95, 98, 98, 100, 100, 102, 102, 103, 103, 104, 104, 108, - 108, 109, 109, 110, 110, 112, 112, 114, 114, 117, 117, 58, 66, 67, 68, - 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, - 84, 85, 86, 87, 89, 106, 107, 113, 118, 119, 120, 121, 122, -1, -1, - -1, -1, 38, 38, 38, 38, 38, 38, 38, 38, 42, 42, 42, 42, 42, - 42, 42, 42, 44, 44, 44, 44, 44, 44, 44, 44, 59, 59, 59, 59, - 59, 59, 59, 59, 88, 88, 88, 88, 88, 88, 88, 88, 90, 90, 90, - 90, 90, 90, 90, 90, 33, 33, 34, 34, 40, 40, 41, 41, 63, 63, - 39, 43, 124, -1, -1, -1, 35, 35, 35, 35, 35, 35, 35, 35, 62, - 62, 62, 62, 62, 62, 62, 62, 0, 0, 0, 0, 36, 36, 36, 36, - 64, 64, 64, 64, 91, 91, 91, 91, 69, 69, 69, 69, 69, 69, 69, - 69, 70, 70, 70, 70, 70, 70, 70, 70, 71, 71, 71, 71, 71, 71, - 71, 71, 72, 72, 72, 72, 72, 72, 72, 72, 73, 73, 73, 73, 73, - 73, 73, 73, 74, 74, 74, 74, 74, 74, 74, 74, 75, 75, 75, 75, - 75, 75, 75, 75, 76, 76, 76, 76, 76, 76, 76, 76, 77, 77, 77, - 77, 77, 77, 77, 77, 78, 78, 78, 78, 78, 78, 78, 78, 79, 79, - 79, 79, 79, 79, 79, 79, 80, 80, 80, 80, 80, 80, 80, 80, 81, - 81, 81, 81, 81, 81, 81, 81, 82, 82, 82, 82, 82, 82, 82, 82, - 83, 83, 83, 83, 83, 83, 83, 83, 84, 84, 84, 84, 84, 84, 84, - 84, 85, 85, 85, 85, 85, 85, 85, 85, 86, 86, 86, 86, 86, 86, - 86, 86, 87, 87, 87, 87, 87, 87, 87, 87, 89, 89, 89, 89, 89, - 89, 89, 89, 106, 106, 106, 106, 106, 106, 106, 106, 107, 107, 107, 107, - 107, 107, 107, 107, 113, 113, 113, 113, 113, 113, 113, 113, 118, 118, 118, - 118, 118, 118, 118, 118, 119, 119, 119, 119, 119, 119, 119, 119, 120, 120, - 120, 120, 120, 120, 120, 120, 121, 121, 121, 121, 121, 121, 121, 121, 122, - 122, 122, 122, 122, 122, 122, 122, 38, 38, 38, 38, 42, 42, 42, 42, - 44, 44, 44, 44, 59, 59, 59, 59, 88, 88, 88, 88, 90, 90, 90, - 90, 33, 34, 40, 41, 63, -1, -1, -1, 39, 39, 39, 39, 39, 39, - 39, 39, 43, 43, 43, 43, 43, 43, 43, 43, 124, 124, 124, 124, 124, - 124, 124, 124, 35, 35, 35, 35, 62, 62, 62, 62, 0, 0, 36, 36, - 64, 64, 91, 91, 93, 93, 126, 126, 94, 125, -1, -1, 60, 60, 60, - 60, 60, 60, 60, 60, 96, 96, 96, 96, 96, 96, 96, 96, 123, 123, - 123, 123, 123, 123, 123, 123, -1, -1, -1, -1, -1, -1, -1, -1, 92, - 92, 92, 92, 92, 92, 92, 92, 195, 195, 195, 195, 195, 195, 195, 195, - 208, 208, 208, 208, 208, 208, 208, 208, 128, 128, 128, 128, 130, 130, 130, - 130, 131, 131, 131, 131, 162, 162, 162, 162, 184, 184, 184, 184, 194, 194, - 194, 194, 224, 224, 224, 224, 226, 226, 226, 226, 153, 153, 161, 161, 167, - 167, 172, 172, 176, 176, 177, 177, 179, 179, 209, 209, 216, 216, 217, 217, - 227, 227, 229, 229, 230, 230, 129, 132, 133, 134, 136, 146, 154, 156, 160, - 163, 164, 169, 170, 173, 178, 181, 185, 186, 187, 189, 190, 196, 198, 228, - 232, 233, -1, -1, -1, -1, 1, 1, 1, 1, 1, 1, 1, 1, 135, - 135, 135, 135, 135, 135, 135, 135, 137, 137, 137, 137, 137, 137, 137, 137, - 138, 138, 138, 138, 138, 138, 138, 138, 139, 139, 139, 139, 139, 139, 139, - 139, 140, 140, 140, 140, 140, 140, 140, 140, 141, 141, 141, 141, 141, 141, - 141, 141, 143, 143, 143, 143, 143, 143, 143, 143, 147, 147, 147, 147, 147, - 147, 147, 147, 149, 149, 149, 149, 149, 149, 149, 149, 150, 150, 150, 150, - 150, 150, 150, 150, 151, 151, 151, 151, 151, 151, 151, 151, 152, 152, 152, - 152, 152, 152, 152, 152, 155, 155, 155, 155, 155, 155, 155, 155, 157, 157, - 157, 157, 157, 157, 157, 157, 158, 158, 158, 158, 158, 158, 158, 158, 165, - 165, 165, 165, 165, 165, 165, 165, 166, 166, 166, 166, 166, 166, 166, 166, - 168, 168, 168, 168, 168, 168, 168, 168, 174, 174, 174, 174, 174, 174, 174, - 174, 175, 175, 175, 175, 175, 175, 175, 175, 180, 180, 180, 180, 180, 180, - 180, 180, 182, 182, 182, 182, 182, 182, 182, 182, 183, 183, 183, 183, 183, - 183, 183, 183, 188, 188, 188, 188, 188, 188, 188, 188, 191, 191, 191, 191, - 191, 191, 191, 191, 197, 197, 197, 197, 197, 197, 197, 197, 231, 231, 231, - 231, 231, 231, 231, 231, 239, 239, 239, 239, 239, 239, 239, 239, 9, 9, - 9, 9, 142, 142, 142, 142, 144, 144, 144, 144, 145, 145, 145, 145, 148, - 148, 148, 148, 159, 159, 159, 159, 171, 171, 171, 171, 206, 206, 206, 206, - 215, 215, 215, 215, 225, 225, 225, 225, 236, 236, 236, 236, 237, 237, 237, - 237, 199, 199, 207, 207, 234, 234, 235, 235, 192, 193, 200, 201, 202, 205, - 210, 213, 218, 219, 238, 240, 242, 243, 255, -1, 203, 203, 203, 203, 203, - 203, 203, 203, 204, 204, 204, 204, 204, 204, 204, 204, 211, 211, 211, 211, - 211, 211, 211, 211, 212, 212, 212, 212, 212, 212, 212, 212, 214, 214, 214, - 214, 214, 214, 214, 214, 221, 221, 221, 221, 221, 221, 221, 221, 222, 222, - 222, 222, 222, 222, 222, 222, 223, 223, 223, 223, 223, 223, 223, 223, 241, - 241, 241, 241, 241, 241, 241, 241, 244, 244, 244, 244, 244, 244, 244, 244, - 245, 245, 245, 245, 245, 245, 245, 245, 246, 246, 246, 246, 246, 246, 246, - 246, 247, 247, 247, 247, 247, 247, 247, 247, 248, 248, 248, 248, 248, 248, - 248, 248, 250, 250, 250, 250, 250, 250, 250, 250, 251, 251, 251, 251, 251, - 251, 251, 251, 252, 252, 252, 252, 252, 252, 252, 252, 253, 253, 253, 253, - 253, 253, 253, 253, 254, 254, 254, 254, 254, 254, 254, 254, 2, 2, 2, - 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, - 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 11, 11, 11, 11, 12, - 12, 12, 12, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, - 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, - 20, 21, 21, 21, 21, 23, 23, 23, 23, 24, 24, 24, 24, 25, 25, - 25, 25, 26, 26, 26, 26, 27, 27, 27, 27, 28, 28, 28, 28, 29, - 29, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31, 127, 127, 127, 127, - 220, 220, 220, 220, 249, 249, 249, 249, 10, 13, 22, 256, 93, 93, 93, - 93, 126, 126, 126, 126, 94, 94, 125, 125, 60, 96, 123, -1, 92, 195, - 208, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 128, - 128, 128, 128, 128, 128, 128, 128, 130, 130, 130, 130, 130, 130, 130, 130, - 131, 131, 131, 131, 131, 131, 131, 131, 162, 162, 162, 162, 162, 162, 162, - 162, 184, 184, 184, 184, 184, 184, 184, 184, 194, 194, 194, 194, 194, 194, - 194, 194, 224, 224, 224, 224, 224, 224, 224, 224, 226, 226, 226, 226, 226, - 226, 226, 226, 153, 153, 153, 153, 161, 161, 161, 161, 167, 167, 167, 167, - 172, 172, 172, 172, 176, 176, 176, 176, 177, 177, 177, 177, 179, 179, 179, - 179, 209, 209, 209, 209, 216, 216, 216, 216, 217, 217, 217, 217, 227, 227, - 227, 227, 229, 229, 229, 229, 230, 230, 230, 230, 129, 129, 132, 132, 133, - 133, 134, 134, 136, 136, 146, 146, 154, 154, 156, 156, 160, 160, 163, 163, - 164, 164, 169, 169, 170, 170, 173, 173, 178, 178, 181, 181, 185, 185, 186, - 186, 187, 187, 189, 189, 190, 190, 196, 196, 198, 198, 228, 228, 232, 232, - 233, 233, 1, 135, 137, 138, 139, 140, 141, 143, 147, 149, 150, 151, 152, - 155, 157, 158, 165, 166, 168, 174, 175, 180, 182, 183, 188, 191, 197, 231, - 239, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 9, 9, 9, - 9, 9, 9, 9, 9, 142, 142, 142, 142, 142, 142, 142, 142, 144, 144, - 144, 144, 144, 144, 144, 144, 145, 145, 145, 145, 145, 145, 145, 145, 148, - 148, 148, 148, 148, 148, 148, 148, 159, 159, 159, 159, 159, 159, 159, 159, - 171, 171, 171, 171, 171, 171, 171, 171, 206, 206, 206, 206, 206, 206, 206, - 206, 215, 215, 215, 215, 215, 215, 215, 215, 225, 225, 225, 225, 225, 225, - 225, 225, 236, 236, 236, 236, 236, 236, 236, 236, 237, 237, 237, 237, 237, - 237, 237, 237, 199, 199, 199, 199, 207, 207, 207, 207, 234, 234, 234, 234, - 235, 235, 235, 235, 192, 192, 193, 193, 200, 200, 201, 201, 202, 202, 205, - 205, 210, 210, 213, 213, 218, 218, 219, 219, 238, 238, 240, 240, 242, 242, - 243, 243, 255, 255, 203, 204, 211, 212, 214, 221, 222, 223, 241, 244, 245, - 246, 247, 248, 250, 251, 252, 253, 254, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, 2, 2, 2, 2, 2, 2, 2, - 2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, - 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, - 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, - 8, 8, 8, 8, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, - 12, 12, 12, 12, 12, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, - 15, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16, 17, - 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, - 19, 19, 19, 19, 19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, - 20, 21, 21, 21, 21, 21, 21, 21, 21, 23, 23, 23, 23, 23, 23, - 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 25, 25, 25, 25, 25, - 25, 25, 25, 26, 26, 26, 26, 26, 26, 26, 26, 27, 27, 27, 27, - 27, 27, 27, 27, 28, 28, 28, 28, 28, 28, 28, 28, 29, 29, 29, - 29, 29, 29, 29, 29, 30, 30, 30, 30, 30, 30, 30, 30, 31, 31, - 31, 31, 31, 31, 31, 31, 127, 127, 127, 127, 127, 127, 127, 127, 220, - 220, 220, 220, 220, 220, 220, 220, 249, 249, 249, 249, 249, 249, 249, 249, - 10, 10, 13, 13, 22, 22, 256, 256, 67, 67, 67, 67, 67, 67, 67, - 67, 68, 68, 68, 68, 68, 68, 68, 68, 95, 95, 95, 95, 95, 95, - 95, 95, 98, 98, 98, 98, 98, 98, 98, 98, 100, 100, 100, 100, 100, - 100, 100, 100, 102, 102, 102, 102, 102, 102, 102, 102, 103, 103, 103, 103, - 103, 103, 103, 103, 104, 104, 104, 104, 104, 104, 104, 104, 108, 108, 108, - 108, 108, 108, 108, 108, 109, 109, 109, 109, 109, 109, 109, 109, 110, 110, - 110, 110, 110, 110, 110, 110, 112, 112, 112, 112, 112, 112, 112, 112, 114, - 114, 114, 114, 114, 114, 114, 114, 117, 117, 117, 117, 117, 117, 117, 117, - 58, 58, 58, 58, 66, 66, 66, 66, 67, 67, 67, 67, 68, 68, 68, - 68, 69, 69, 69, 69, 70, 70, 70, 70, 71, 71, 71, 71, 72, 72, - 72, 72, 73, 73, 73, 73, 74, 74, 74, 74, 75, 75, 75, 75, 76, - 76, 76, 76, 77, 77, 77, 77, 78, 78, 78, 78, 79, 79, 79, 79, - 80, 80, 80, 80, 81, 81, 81, 81, 82, 82, 82, 82, 83, 83, 83, - 83, 84, 84, 84, 84, 85, 85, 85, 85, 86, 86, 86, 86, 87, 87, - 87, 87, 89, 89, 89, 89, 106, 106, 106, 106, 107, 107, 107, 107, 113, - 113, 113, 113, 118, 118, 118, 118, 119, 119, 119, 119, 120, 120, 120, 120, - 121, 121, 121, 121, 122, 122, 122, 122, 38, 38, 42, 42, 44, 44, 59, - 59, 88, 88, 90, 90, -1, -1, -1, -1, 33, 33, 33, 33, 33, 33, - 33, 33, 34, 34, 34, 34, 34, 34, 34, 34, 40, 40, 40, 40, 40, - 40, 40, 40, 41, 41, 41, 41, 41, 41, 41, 41, 63, 63, 63, 63, - 63, 63, 63, 63, 39, 39, 39, 39, 43, 43, 43, 43, 124, 124, 124, - 124, 35, 35, 62, 62, 0, 36, 64, 91, 93, 126, -1, -1, 94, 94, - 94, 94, 94, 94, 94, 94, 125, 125, 125, 125, 125, 125, 125, 125, 60, - 60, 60, 60, 96, 96, 96, 96, 123, 123, 123, 123, -1, -1, -1, -1, - 92, 92, 92, 92, 195, 195, 195, 195, 208, 208, 208, 208, 128, 128, 130, - 130, 131, 131, 162, 162, 184, 184, 194, 194, 224, 224, 226, 226, 153, 161, - 167, 172, 176, 177, 179, 209, 216, 217, 227, 229, 230, -1, -1, -1, -1, - -1, -1, -1, 129, 129, 129, 129, 129, 129, 129, 129, 132, 132, 132, 132, - 132, 132, 132, 132, 133, 133, 133, 133, 133, 133, 133, 133, 134, 134, 134, - 134, 134, 134, 134, 134, 136, 136, 136, 136, 136, 136, 136, 136, 146, 146, - 146, 146, 146, 146, 146, 146, 154, 154, 154, 154, 154, 154, 154, 154, 156, - 156, 156, 156, 156, 156, 156, 156, 160, 160, 160, 160, 160, 160, 160, 160, - 163, 163, 163, 163, 163, 163, 163, 163, 164, 164, 164, 164, 164, 164, 164, - 164, 169, 169, 169, 169, 169, 169, 169, 169, 170, 170, 170, 170, 170, 170, - 170, 170, 173, 173, 173, 173, 173, 173, 173, 173, 178, 178, 178, 178, 178, - 178, 178, 178, 181, 181, 181, 181, 181, 181, 181, 181, 185, 185, 185, 185, - 185, 185, 185, 185, 186, 186, 186, 186, 186, 186, 186, 186, 187, 187, 187, - 187, 187, 187, 187, 187, 189, 189, 189, 189, 189, 189, 189, 189, 190, 190, - 190, 190, 190, 190, 190, 190, 196, 196, 196, 196, 196, 196, 196, 196, 198, - 198, 198, 198, 198, 198, 198, 198, 228, 228, 228, 228, 228, 228, 228, 228, - 232, 232, 232, 232, 232, 232, 232, 232, 233, 233, 233, 233, 233, 233, 233, - 233, 1, 1, 1, 1, 135, 135, 135, 135, 137, 137, 137, 137, 138, 138, - 138, 138, 139, 139, 139, 139, 140, 140, 140, 140, 141, 141, 141, 141, 143, - 143, 143, 143, 147, 147, 147, 147, 149, 149, 149, 149, 150, 150, 150, 150, - 151, 151, 151, 151, 152, 152, 152, 152, 155, 155, 155, 155, 157, 157, 157, - 157, 158, 158, 158, 158, 165, 165, 165, 165, 166, 166, 166, 166, 168, 168, - 168, 168, 174, 174, 174, 174, 175, 175, 175, 175, 180, 180, 180, 180, 182, - 182, 182, 182, 183, 183, 183, 183, 188, 188, 188, 188, 191, 191, 191, 191, - 197, 197, 197, 197, 231, 231, 231, 231, 239, 239, 239, 239, 9, 9, 142, - 142, 144, 144, 145, 145, 148, 148, 159, 159, 171, 171, 206, 206, 215, 215, - 225, 225, 236, 236, 237, 237, 199, 207, 234, 235, 192, 192, 192, 192, 192, - 192, 192, 192, 193, 193, 193, 193, 193, 193, 193, 193, 200, 200, 200, 200, - 200, 200, 200, 200, 201, 201, 201, 201, 201, 201, 201, 201, 202, 202, 202, - 202, 202, 202, 202, 202, 205, 205, 205, 205, 205, 205, 205, 205, 210, 210, - 210, 210, 210, 210, 210, 210, 213, 213, 213, 213, 213, 213, 213, 213, 218, - 218, 218, 218, 218, 218, 218, 218, 219, 219, 219, 219, 219, 219, 219, 219, - 238, 238, 238, 238, 238, 238, 238, 238, 240, 240, 240, 240, 240, 240, 240, - 240, 242, 242, 242, 242, 242, 242, 242, 242, 243, 243, 243, 243, 243, 243, - 243, 243, 255, 255, 255, 255, 255, 255, 255, 255, 203, 203, 203, 203, 204, - 204, 204, 204, 211, 211, 211, 211, 212, 212, 212, 212, 214, 214, 214, 214, - 221, 221, 221, 221, 222, 222, 222, 222, 223, 223, 223, 223, 241, 241, 241, - 241, 244, 244, 244, 244, 245, 245, 245, 245, 246, 246, 246, 246, 247, 247, - 247, 247, 248, 248, 248, 248, 250, 250, 250, 250, 251, 251, 251, 251, 252, - 252, 252, 252, 253, 253, 253, 253, 254, 254, 254, 254, 2, 2, 3, 3, - 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 11, 11, 12, 12, 14, - 14, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, - 23, 23, 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, - 30, 31, 31, 127, 127, 220, 220, 249, 249, -1, -1, 10, 10, 10, 10, - 10, 10, 10, 10, 13, 13, 13, 13, 13, 13, 13, 13, 22, 22, 22, - 22, 22, 22, 22, 22, 256, 256, 256, 256, 256, 256, 256, 256, 45, 45, - 45, 45, 45, 45, 45, 45, 46, 46, 46, 46, 46, 46, 46, 46, 47, - 47, 47, 47, 47, 47, 47, 47, 51, 51, 51, 51, 51, 51, 51, 51, - 52, 52, 52, 52, 52, 52, 52, 52, 53, 53, 53, 53, 53, 53, 53, - 53, 54, 54, 54, 54, 54, 54, 54, 54, 55, 55, 55, 55, 55, 55, - 55, 55, 56, 56, 56, 56, 56, 56, 56, 56, 57, 57, 57, 57, 57, - 57, 57, 57, 50, 50, 50, 50, 50, 50, 50, 50, 97, 97, 97, 97, - 97, 97, 97, 97, 99, 99, 99, 99, 99, 99, 99, 99, 101, 101, 101, - 101, 101, 101, 101, 101, 105, 105, 105, 105, 105, 105, 105, 105, 111, 111, - 111, 111, 111, 111, 111, 111, 115, 115, 115, 115, 115, 115, 115, 115, 116, - 116, 116, 116, 116, 116, 116, 116, 32, 32, 32, 32, 37, 37, 37, 37, - 45, 45, 45, 45, 46, 46, 46, 46, 47, 47, 47, 47, 51, 51, 51, - 51, 52, 52, 52, 52, 53, 53, 53, 53, 54, 54, 54, 54, 55, 55, - 55, 55, 56, 56, 56, 56, 57, 57, 57, 57, 61, 61, 61, 61, 65, - 65, 65, 65, 95, 95, 95, 95, 98, 98, 98, 98, 100, 100, 100, 100, - 102, 102, 102, 102, 103, 103, 103, 103, 104, 104, 104, 104, 108, 108, 108, - 108, 109, 109, 109, 109, 110, 110, 110, 110, 112, 112, 112, 112, 114, 114, - 114, 114, 117, 117, 117, 117, 58, 58, 66, 66, 67, 67, 68, 68, 69, - 69, 70, 70, 71, 71, 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, - 77, 77, 78, 78, 79, 79, 80, 80, 81, 81, 82, 82, 83, 83, 84, - 84, 85, 85, 86, 86, 87, 87, 89, 89, 106, 106, 107, 107, 113, 113, - 118, 118, 119, 119, 120, 120, 121, 121, 122, 122, 38, 42, 44, 59, 88, - 90, -1, -1, 33, 33, 33, 33, 34, 34, 34, 34, 40, 40, 40, 40, - 41, 41, 41, 41, 63, 63, 63, 63, 39, 39, 43, 43, 124, 124, 35, - 62, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 36, 36, - 36, 36, 36, 36, 36, 36, 64, 64, 64, 64, 64, 64, 64, 64, 91, - 91, 91, 91, 91, 91, 91, 91, 93, 93, 93, 93, 93, 93, 93, 93, - 126, 126, 126, 126, 126, 126, 126, 126, 94, 94, 94, 94, 125, 125, 125, - 125, 60, 60, 96, 96, 123, 123, -1, -1, 92, 92, 195, 195, 208, 208, - 128, 130, 131, 162, 184, 194, 224, 226, -1, -1, 153, 153, 153, 153, 153, - 153, 153, 153, 161, 161, 161, 161, 161, 161, 161, 161, 167, 167, 167, 167, - 167, 167, 167, 167, 172, 172, 172, 172, 172, 172, 172, 172, 176, 176, 176, - 176, 176, 176, 176, 176, 177, 177, 177, 177, 177, 177, 177, 177, 179, 179, - 179, 179, 179, 179, 179, 179, 209, 209, 209, 209, 209, 209, 209, 209, 216, - 216, 216, 216, 216, 216, 216, 216, 217, 217, 217, 217, 217, 217, 217, 217, - 227, 227, 227, 227, 227, 227, 227, 227, 229, 229, 229, 229, 229, 229, 229, - 229, 230, 230, 230, 230, 230, 230, 230, 230, 129, 129, 129, 129, 132, 132, - 132, 132, 133, 133, 133, 133, 134, 134, 134, 134, 136, 136, 136, 136, 146, - 146, 146, 146, 154, 154, 154, 154, 156, 156, 156, 156, 160, 160, 160, 160, - 163, 163, 163, 163, 164, 164, 164, 164, 169, 169, 169, 169, 170, 170, 170, - 170, 173, 173, 173, 173, 178, 178, 178, 178, 181, 181, 181, 181, 185, 185, - 185, 185, 186, 186, 186, 186, 187, 187, 187, 187, 189, 189, 189, 189, 190, - 190, 190, 190, 196, 196, 196, 196, 198, 198, 198, 198, 228, 228, 228, 228, - 232, 232, 232, 232, 233, 233, 233, 233, 1, 1, 135, 135, 137, 137, 138, - 138, 139, 139, 140, 140, 141, 141, 143, 143, 147, 147, 149, 149, 150, 150, - 151, 151, 152, 152, 155, 155, 157, 157, 158, 158, 165, 165, 166, 166, 168, - 168, 174, 174, 175, 175, 180, 180, 182, 182, 183, 183, 188, 188, 191, 191, - 197, 197, 231, 231, 239, 239, 9, 142, 144, 145, 148, 159, 171, 206, 215, - 225, 236, 237, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 199, 199, - 199, 199, 199, 199, 199, 199, 207, 207, 207, 207, 207, 207, 207, 207, 234, - 234, 234, 234, 234, 234, 234, 234, 235, 235, 235, 235, 235, 235, 235, 235, - 192, 192, 192, 192, 193, 193, 193, 193, 200, 200, 200, 200, 201, 201, 201, - 201, 202, 202, 202, 202, 205, 205, 205, 205, 210, 210, 210, 210, 213, 213, - 213, 213, 218, 218, 218, 218, 219, 219, 219, 219, 238, 238, 238, 238, 240, - 240, 240, 240, 242, 242, 242, 242, 243, 243, 243, 243, 255, 255, 255, 255, - 203, 203, 204, 204, 211, 211, 212, 212, 214, 214, 221, 221, 222, 222, 223, - 223, 241, 241, 244, 244, 245, 245, 246, 246, 247, 247, 248, 248, 250, 250, - 251, 251, 252, 252, 253, 253, 254, 254, 2, 3, 4, 5, 6, 7, 8, - 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27, - 28, 29, 30, 31, 127, 220, 249, -1, 10, 10, 10, 10, 13, 13, 13, - 13, 22, 22, 22, 22, 256, 256, 256, 256, -}; - -static const uint8_t inverse_base64[256] = { - 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, - 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, - 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 62, 255, - 255, 255, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 255, 255, - 255, 64, 255, 255, 255, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, - 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, - 25, 255, 255, 255, 255, 255, 255, 26, 27, 28, 29, 30, 31, 32, 33, - 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, - 49, 50, 51, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, - 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, - 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, - 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, - 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, - 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, - 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, - 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, - 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, - 255, -}; - -/* emission helpers */ -static int on_hdr(grpc_chttp2_hpack_parser *p, grpc_mdelem *md, - int add_to_table) { - if (add_to_table) { - if (!grpc_chttp2_hptbl_add(&p->table, md)) { - return 0; - } - } - p->on_header(p->on_header_user_data, md); - return 1; -} - -static grpc_mdstr *take_string(grpc_chttp2_hpack_parser *p, - grpc_chttp2_hpack_parser_string *str) { - grpc_mdstr *s = grpc_mdstr_from_buffer((uint8_t *)str->str, str->length); - str->length = 0; - return s; -} - -/* jump to the next state */ -static int parse_next(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - p->state = *p->next_state++; - return p->state(p, cur, end); -} - -/* begin parsing a header: all functionality is encoded into lookup tables - above */ -static int parse_begin(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - if (cur == end) { - p->state = parse_begin; - return 1; - } - - return first_byte_action[first_byte_lut[*cur]](p, cur, end); -} - -/* stream dependency and prioritization data: we just skip it */ -static int parse_stream_weight(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - if (cur == end) { - p->state = parse_stream_weight; - return 1; - } - - return p->after_prioritization(p, cur + 1, end); -} - -static int parse_stream_dep3(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - if (cur == end) { - p->state = parse_stream_dep3; - return 1; - } - - return parse_stream_weight(p, cur + 1, end); -} - -static int parse_stream_dep2(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - if (cur == end) { - p->state = parse_stream_dep2; - return 1; - } - - return parse_stream_dep3(p, cur + 1, end); -} - -static int parse_stream_dep1(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - if (cur == end) { - p->state = parse_stream_dep1; - return 1; - } - - return parse_stream_dep2(p, cur + 1, end); -} - -static int parse_stream_dep0(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - if (cur == end) { - p->state = parse_stream_dep0; - return 1; - } - - return parse_stream_dep1(p, cur + 1, end); -} - -/* emit an indexed field; for now just logs it to console; jumps to - begin the next field on completion */ -static int finish_indexed_field(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - grpc_mdelem *md = grpc_chttp2_hptbl_lookup(&p->table, p->index); - if (md == NULL) { - gpr_log(GPR_ERROR, "Invalid HPACK index received: %d", p->index); - return 0; - } - GRPC_MDELEM_REF(md); - return on_hdr(p, md, 0) && parse_begin(p, cur, end); -} - -/* parse an indexed field with index < 127 */ -static int parse_indexed_field(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - p->dynamic_table_update_allowed = 0; - p->index = (*cur) & 0x7f; - return finish_indexed_field(p, cur + 1, end); -} - -/* parse an indexed field with index >= 127 */ -static int parse_indexed_field_x(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, const uint8_t *end) { - static const grpc_chttp2_hpack_parser_state and_then[] = { - finish_indexed_field}; - p->dynamic_table_update_allowed = 0; - p->next_state = and_then; - p->index = 0x7f; - p->parsing.value = &p->index; - return parse_value0(p, cur + 1, end); -} - -/* finish a literal header with incremental indexing: just log, and jump to ' - begin */ -static int finish_lithdr_incidx(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - grpc_mdelem *md = grpc_chttp2_hptbl_lookup(&p->table, p->index); - GPR_ASSERT(md != NULL); /* handled in string parsing */ - return on_hdr(p, grpc_mdelem_from_metadata_strings(GRPC_MDSTR_REF(md->key), - take_string(p, &p->value)), - 1) && - parse_begin(p, cur, end); -} - -/* finish a literal header with incremental indexing with no index */ -static int finish_lithdr_incidx_v(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, const uint8_t *end) { - return on_hdr(p, grpc_mdelem_from_metadata_strings(take_string(p, &p->key), - take_string(p, &p->value)), - 1) && - parse_begin(p, cur, end); -} - -/* parse a literal header with incremental indexing; index < 63 */ -static int parse_lithdr_incidx(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - static const grpc_chttp2_hpack_parser_state and_then[] = { - parse_value_string_with_indexed_key, finish_lithdr_incidx}; - p->dynamic_table_update_allowed = 0; - p->next_state = and_then; - p->index = (*cur) & 0x3f; - return parse_string_prefix(p, cur + 1, end); -} - -/* parse a literal header with incremental indexing; index >= 63 */ -static int parse_lithdr_incidx_x(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, const uint8_t *end) { - static const grpc_chttp2_hpack_parser_state and_then[] = { - parse_string_prefix, parse_value_string_with_indexed_key, - finish_lithdr_incidx}; - p->dynamic_table_update_allowed = 0; - p->next_state = and_then; - p->index = 0x3f; - p->parsing.value = &p->index; - return parse_value0(p, cur + 1, end); -} - -/* parse a literal header with incremental indexing; index = 0 */ -static int parse_lithdr_incidx_v(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, const uint8_t *end) { - static const grpc_chttp2_hpack_parser_state and_then[] = { - parse_key_string, parse_string_prefix, - parse_value_string_with_literal_key, finish_lithdr_incidx_v}; - p->dynamic_table_update_allowed = 0; - p->next_state = and_then; - return parse_string_prefix(p, cur + 1, end); -} - -/* finish a literal header without incremental indexing */ -static int finish_lithdr_notidx(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - grpc_mdelem *md = grpc_chttp2_hptbl_lookup(&p->table, p->index); - GPR_ASSERT(md != NULL); /* handled in string parsing */ - return on_hdr(p, grpc_mdelem_from_metadata_strings(GRPC_MDSTR_REF(md->key), - take_string(p, &p->value)), - 0) && - parse_begin(p, cur, end); -} - -/* finish a literal header without incremental indexing with index = 0 */ -static int finish_lithdr_notidx_v(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, const uint8_t *end) { - return on_hdr(p, grpc_mdelem_from_metadata_strings(take_string(p, &p->key), - take_string(p, &p->value)), - 0) && - parse_begin(p, cur, end); -} - -/* parse a literal header without incremental indexing; index < 15 */ -static int parse_lithdr_notidx(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - static const grpc_chttp2_hpack_parser_state and_then[] = { - parse_value_string_with_indexed_key, finish_lithdr_notidx}; - p->dynamic_table_update_allowed = 0; - p->next_state = and_then; - p->index = (*cur) & 0xf; - return parse_string_prefix(p, cur + 1, end); -} - -/* parse a literal header without incremental indexing; index >= 15 */ -static int parse_lithdr_notidx_x(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, const uint8_t *end) { - static const grpc_chttp2_hpack_parser_state and_then[] = { - parse_string_prefix, parse_value_string_with_indexed_key, - finish_lithdr_notidx}; - p->dynamic_table_update_allowed = 0; - p->next_state = and_then; - p->index = 0xf; - p->parsing.value = &p->index; - return parse_value0(p, cur + 1, end); -} - -/* parse a literal header without incremental indexing; index == 0 */ -static int parse_lithdr_notidx_v(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, const uint8_t *end) { - static const grpc_chttp2_hpack_parser_state and_then[] = { - parse_key_string, parse_string_prefix, - parse_value_string_with_literal_key, finish_lithdr_notidx_v}; - p->dynamic_table_update_allowed = 0; - p->next_state = and_then; - return parse_string_prefix(p, cur + 1, end); -} - -/* finish a literal header that is never indexed */ -static int finish_lithdr_nvridx(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - grpc_mdelem *md = grpc_chttp2_hptbl_lookup(&p->table, p->index); - GPR_ASSERT(md != NULL); /* handled in string parsing */ - return on_hdr(p, grpc_mdelem_from_metadata_strings(GRPC_MDSTR_REF(md->key), - take_string(p, &p->value)), - 0) && - parse_begin(p, cur, end); -} - -/* finish a literal header that is never indexed with an extra value */ -static int finish_lithdr_nvridx_v(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, const uint8_t *end) { - return on_hdr(p, grpc_mdelem_from_metadata_strings(take_string(p, &p->key), - take_string(p, &p->value)), - 0) && - parse_begin(p, cur, end); -} - -/* parse a literal header that is never indexed; index < 15 */ -static int parse_lithdr_nvridx(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - static const grpc_chttp2_hpack_parser_state and_then[] = { - parse_value_string_with_indexed_key, finish_lithdr_nvridx}; - p->dynamic_table_update_allowed = 0; - p->next_state = and_then; - p->index = (*cur) & 0xf; - return parse_string_prefix(p, cur + 1, end); -} - -/* parse a literal header that is never indexed; index >= 15 */ -static int parse_lithdr_nvridx_x(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, const uint8_t *end) { - static const grpc_chttp2_hpack_parser_state and_then[] = { - parse_string_prefix, parse_value_string_with_indexed_key, - finish_lithdr_nvridx}; - p->dynamic_table_update_allowed = 0; - p->next_state = and_then; - p->index = 0xf; - p->parsing.value = &p->index; - return parse_value0(p, cur + 1, end); -} - -/* parse a literal header that is never indexed; index == 0 */ -static int parse_lithdr_nvridx_v(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, const uint8_t *end) { - static const grpc_chttp2_hpack_parser_state and_then[] = { - parse_key_string, parse_string_prefix, - parse_value_string_with_literal_key, finish_lithdr_nvridx_v}; - p->dynamic_table_update_allowed = 0; - p->next_state = and_then; - return parse_string_prefix(p, cur + 1, end); -} - -/* finish parsing a max table size change */ -static int finish_max_tbl_size(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - gpr_log(GPR_INFO, "MAX TABLE SIZE: %d", p->index); - return grpc_chttp2_hptbl_set_current_table_size(&p->table, p->index) && - parse_begin(p, cur, end); -} - -/* parse a max table size change, max size < 15 */ -static int parse_max_tbl_size(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - if (p->dynamic_table_update_allowed == 0) { - return 0; - } - p->dynamic_table_update_allowed--; - p->index = (*cur) & 0x1f; - return finish_max_tbl_size(p, cur + 1, end); -} - -/* parse a max table size change, max size >= 15 */ -static int parse_max_tbl_size_x(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - static const grpc_chttp2_hpack_parser_state and_then[] = { - finish_max_tbl_size}; - if (p->dynamic_table_update_allowed == 0) { - return 0; - } - p->dynamic_table_update_allowed--; - p->next_state = and_then; - p->index = 0x1f; - p->parsing.value = &p->index; - return parse_value0(p, cur + 1, end); -} - -/* a parse error: jam the parse state into parse_error, and return error */ -static int parse_error(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - p->state = parse_error; - return 0; -} - -static int parse_illegal_op(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - GPR_ASSERT(cur != end); - gpr_log(GPR_DEBUG, "Illegal hpack op code %d", *cur); - return parse_error(p, cur, end); -} - -/* parse the 1st byte of a varint into p->parsing.value - no overflow is possible */ -static int parse_value0(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - if (cur == end) { - p->state = parse_value0; - return 1; - } - - *p->parsing.value += (*cur) & 0x7f; - - if ((*cur) & 0x80) { - return parse_value1(p, cur + 1, end); - } else { - return parse_next(p, cur + 1, end); - } -} - -/* parse the 2nd byte of a varint into p->parsing.value - no overflow is possible */ -static int parse_value1(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - if (cur == end) { - p->state = parse_value1; - return 1; - } - - *p->parsing.value += (((uint32_t)*cur) & 0x7f) << 7; - - if ((*cur) & 0x80) { - return parse_value2(p, cur + 1, end); - } else { - return parse_next(p, cur + 1, end); - } -} - -/* parse the 3rd byte of a varint into p->parsing.value - no overflow is possible */ -static int parse_value2(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - if (cur == end) { - p->state = parse_value2; - return 1; - } - - *p->parsing.value += (((uint32_t)*cur) & 0x7f) << 14; - - if ((*cur) & 0x80) { - return parse_value3(p, cur + 1, end); - } else { - return parse_next(p, cur + 1, end); - } -} - -/* parse the 4th byte of a varint into p->parsing.value - no overflow is possible */ -static int parse_value3(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - if (cur == end) { - p->state = parse_value3; - return 1; - } - - *p->parsing.value += (((uint32_t)*cur) & 0x7f) << 21; - - if ((*cur) & 0x80) { - return parse_value4(p, cur + 1, end); - } else { - return parse_next(p, cur + 1, end); - } -} - -/* parse the 5th byte of a varint into p->parsing.value - depending on the byte, we may overflow, and care must be taken */ -static int parse_value4(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - uint8_t c; - uint32_t cur_value; - uint32_t add_value; - - if (cur == end) { - p->state = parse_value4; - return 1; - } - - c = (*cur) & 0x7f; - if (c > 0xf) { - goto error; - } - - cur_value = *p->parsing.value; - add_value = ((uint32_t)c) << 28; - if (add_value > 0xffffffffu - cur_value) { - goto error; - } - - *p->parsing.value = cur_value + add_value; - - if ((*cur) & 0x80) { - return parse_value5up(p, cur + 1, end); - } else { - return parse_next(p, cur + 1, end); - } - -error: - gpr_log(GPR_ERROR, - "integer overflow in hpack integer decoding: have 0x%08x, " - "got byte 0x%02x on byte 5", - *p->parsing.value, *cur); - return parse_error(p, cur, end); -} - -/* parse any trailing bytes in a varint: it's possible to append an arbitrary - number of 0x80's and not affect the value - a zero will terminate - and - anything else will overflow */ -static int parse_value5up(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - while (cur != end && *cur == 0x80) { - ++cur; - } - - if (cur == end) { - p->state = parse_value5up; - return 1; - } - - if (*cur == 0) { - return parse_next(p, cur + 1, end); - } - - gpr_log(GPR_ERROR, - "integer overflow in hpack integer decoding: have 0x%08x, " - "got byte 0x%02x sometime after byte 5", - *p->parsing.value, *cur); - return parse_error(p, cur, end); -} - -/* parse a string prefix */ -static int parse_string_prefix(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - if (cur == end) { - p->state = parse_string_prefix; - return 1; - } - - p->strlen = (*cur) & 0x7f; - p->huff = (*cur) >> 7; - if (p->strlen == 0x7f) { - p->parsing.value = &p->strlen; - return parse_value0(p, cur + 1, end); - } else { - return parse_next(p, cur + 1, end); - } -} - -/* append some bytes to a string */ -static void append_bytes(grpc_chttp2_hpack_parser_string *str, - const uint8_t *data, size_t length) { - if (length + str->length > str->capacity) { - GPR_ASSERT(str->length + length <= UINT32_MAX); - str->capacity = (uint32_t)(str->length + length); - str->str = gpr_realloc(str->str, str->capacity); - } - memcpy(str->str + str->length, data, length); - GPR_ASSERT(length <= UINT32_MAX - str->length); - str->length += (uint32_t)length; -} - -static int append_string(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - grpc_chttp2_hpack_parser_string *str = p->parsing.str; - uint32_t bits; - uint8_t decoded[3]; - switch ((binary_state)p->binary) { - case NOT_BINARY: - append_bytes(str, cur, (size_t)(end - cur)); - return 1; - b64_byte0: - case B64_BYTE0: - if (cur == end) { - p->binary = B64_BYTE0; - return 1; - } - bits = inverse_base64[*cur]; - ++cur; - if (bits == 255) - return 0; - else if (bits == 64) - goto b64_byte0; - p->base64_buffer = bits << 18; - /* fallthrough */ - b64_byte1: - case B64_BYTE1: - if (cur == end) { - p->binary = B64_BYTE1; - return 1; - } - bits = inverse_base64[*cur]; - ++cur; - if (bits == 255) - return 0; - else if (bits == 64) - goto b64_byte1; - p->base64_buffer |= bits << 12; - /* fallthrough */ - b64_byte2: - case B64_BYTE2: - if (cur == end) { - p->binary = B64_BYTE2; - return 1; - } - bits = inverse_base64[*cur]; - ++cur; - if (bits == 255) - return 0; - else if (bits == 64) - goto b64_byte2; - p->base64_buffer |= bits << 6; - /* fallthrough */ - b64_byte3: - case B64_BYTE3: - if (cur == end) { - p->binary = B64_BYTE3; - return 1; - } - bits = inverse_base64[*cur]; - ++cur; - if (bits == 255) - return 0; - else if (bits == 64) - goto b64_byte3; - p->base64_buffer |= bits; - bits = p->base64_buffer; - decoded[0] = (uint8_t)(bits >> 16); - decoded[1] = (uint8_t)(bits >> 8); - decoded[2] = (uint8_t)(bits); - append_bytes(str, decoded, 3); - goto b64_byte0; - } - GPR_UNREACHABLE_CODE(return 1); -} - -/* append a null terminator to a string */ -static int finish_str(grpc_chttp2_hpack_parser *p) { - uint8_t terminator = 0; - uint8_t decoded[2]; - uint32_t bits; - grpc_chttp2_hpack_parser_string *str = p->parsing.str; - switch ((binary_state)p->binary) { - case NOT_BINARY: - break; - case B64_BYTE0: - break; - case B64_BYTE1: - gpr_log(GPR_ERROR, "illegal base64 encoding"); - return 0; /* illegal encoding */ - case B64_BYTE2: - bits = p->base64_buffer; - if (bits & 0xffff) { - gpr_log(GPR_ERROR, "trailing bits in base64 encoding: 0x%04x", - bits & 0xffff); - return 0; - } - decoded[0] = (uint8_t)(bits >> 16); - append_bytes(str, decoded, 1); - break; - case B64_BYTE3: - bits = p->base64_buffer; - if (bits & 0xff) { - gpr_log(GPR_ERROR, "trailing bits in base64 encoding: 0x%02x", - bits & 0xff); - return 0; - } - decoded[0] = (uint8_t)(bits >> 16); - decoded[1] = (uint8_t)(bits >> 8); - append_bytes(str, decoded, 2); - break; - } - append_bytes(str, &terminator, 1); - p->parsing.str->length--; /* don't actually count the null terminator */ - return 1; -} - -/* decode a nibble from a huffman encoded stream */ -static int huff_nibble(grpc_chttp2_hpack_parser *p, uint8_t nibble) { - int16_t emit = emit_sub_tbl[16 * emit_tbl[p->huff_state] + nibble]; - int16_t next = next_sub_tbl[16 * next_tbl[p->huff_state] + nibble]; - if (emit != -1) { - if (emit >= 0 && emit < 256) { - uint8_t c = (uint8_t)emit; - if (!append_string(p, &c, (&c) + 1)) return 0; - } else { - assert(emit == 256); - } - } - p->huff_state = next; - return 1; -} - -/* decode full bytes from a huffman encoded stream */ -static int add_huff_bytes(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - for (; cur != end; ++cur) { - if (!huff_nibble(p, *cur >> 4) || !huff_nibble(p, *cur & 0xf)) return 0; - } - return 1; -} - -/* decode some string bytes based on the current decoding mode - (huffman or not) */ -static int add_str_bytes(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - if (p->huff) { - return add_huff_bytes(p, cur, end); - } else { - return append_string(p, cur, end); - } -} - -/* parse a string - tries to do large chunks at a time */ -static int parse_string(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - size_t remaining = p->strlen - p->strgot; - size_t given = (size_t)(end - cur); - if (remaining <= given) { - return add_str_bytes(p, cur, cur + remaining) && finish_str(p) && - parse_next(p, cur + remaining, end); - } else { - if (!add_str_bytes(p, cur, cur + given)) return 0; - GPR_ASSERT(given <= UINT32_MAX - p->strgot); - p->strgot += (uint32_t)given; - p->state = parse_string; - return 1; - } -} - -/* begin parsing a string - performs setup, calls parse_string */ -static int begin_parse_string(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end, uint8_t binary, - grpc_chttp2_hpack_parser_string *str) { - p->strgot = 0; - str->length = 0; - p->parsing.str = str; - p->huff_state = 0; - p->binary = binary; - return parse_string(p, cur, end); -} - -/* parse the key string */ -static int parse_key_string(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end) { - return begin_parse_string(p, cur, end, NOT_BINARY, &p->key); -} - -/* check if a key represents a binary header or not */ -typedef enum { BINARY_HEADER, PLAINTEXT_HEADER, ERROR_HEADER } is_binary_header; - -static is_binary_header is_binary_literal_header(grpc_chttp2_hpack_parser *p) { - return grpc_is_binary_header(p->key.str, p->key.length) ? BINARY_HEADER - : PLAINTEXT_HEADER; -} - -static is_binary_header is_binary_indexed_header(grpc_chttp2_hpack_parser *p) { - grpc_mdelem *elem = grpc_chttp2_hptbl_lookup(&p->table, p->index); - if (!elem) { - gpr_log(GPR_ERROR, "Invalid HPACK index received: %d", p->index); - return ERROR_HEADER; - } - return grpc_is_binary_header( - (const char *)GPR_SLICE_START_PTR(elem->key->slice), - GPR_SLICE_LENGTH(elem->key->slice)) - ? BINARY_HEADER - : PLAINTEXT_HEADER; -} - -/* parse the value string */ -static int parse_value_string(grpc_chttp2_hpack_parser *p, const uint8_t *cur, - const uint8_t *end, is_binary_header type) { - switch (type) { - case BINARY_HEADER: - return begin_parse_string(p, cur, end, B64_BYTE0, &p->value); - case PLAINTEXT_HEADER: - return begin_parse_string(p, cur, end, NOT_BINARY, &p->value); - case ERROR_HEADER: - return 0; - } - /* Add code to prevent return without value error */ - GPR_UNREACHABLE_CODE(return 0); -} - -static int parse_value_string_with_indexed_key(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, - const uint8_t *end) { - return parse_value_string(p, cur, end, is_binary_indexed_header(p)); -} - -static int parse_value_string_with_literal_key(grpc_chttp2_hpack_parser *p, - const uint8_t *cur, - const uint8_t *end) { - return parse_value_string(p, cur, end, is_binary_literal_header(p)); -} - -/* PUBLIC INTERFACE */ - -static void on_header_not_set(void *user_data, grpc_mdelem *md) { - GPR_UNREACHABLE_CODE(return ); -} - -void grpc_chttp2_hpack_parser_init(grpc_chttp2_hpack_parser *p) { - p->on_header = on_header_not_set; - p->on_header_user_data = NULL; - p->state = parse_begin; - p->key.str = NULL; - p->key.capacity = 0; - p->key.length = 0; - p->value.str = NULL; - p->value.capacity = 0; - p->value.length = 0; - p->dynamic_table_update_allowed = 2; - grpc_chttp2_hptbl_init(&p->table); -} - -void grpc_chttp2_hpack_parser_set_has_priority(grpc_chttp2_hpack_parser *p) { - p->after_prioritization = p->state; - p->state = parse_stream_dep0; -} - -void grpc_chttp2_hpack_parser_destroy(grpc_chttp2_hpack_parser *p) { - grpc_chttp2_hptbl_destroy(&p->table); - gpr_free(p->key.str); - gpr_free(p->value.str); -} - -int grpc_chttp2_hpack_parser_parse(grpc_chttp2_hpack_parser *p, - const uint8_t *beg, const uint8_t *end) { - /* TODO(ctiller): limit the distance of end from beg, and perform multiple - steps in the event of a large chunk of data to limit - stack space usage when no tail call optimization is - available */ - return p->state(p, beg, end); -} - -grpc_chttp2_parse_error grpc_chttp2_header_parser_parse( - grpc_exec_ctx *exec_ctx, void *hpack_parser, - grpc_chttp2_transport_parsing *transport_parsing, - grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last) { - grpc_chttp2_hpack_parser *parser = hpack_parser; - GPR_TIMER_BEGIN("grpc_chttp2_hpack_parser_parse", 0); - if (!grpc_chttp2_hpack_parser_parse(parser, GPR_SLICE_START_PTR(slice), - GPR_SLICE_END_PTR(slice))) { - GPR_TIMER_END("grpc_chttp2_hpack_parser_parse", 0); - return GRPC_CHTTP2_CONNECTION_ERROR; - } - if (is_last) { - if (parser->is_boundary && parser->state != parse_begin) { - gpr_log(GPR_ERROR, - "end of header frame not aligned with a hpack record boundary"); - GPR_TIMER_END("grpc_chttp2_hpack_parser_parse", 0); - return GRPC_CHTTP2_CONNECTION_ERROR; - } - /* need to check for null stream: this can occur if we receive an invalid - stream id on a header */ - if (stream_parsing != NULL) { - if (parser->is_boundary) { - stream_parsing - ->got_metadata_on_parse[stream_parsing->header_frames_received] = 1; - stream_parsing->header_frames_received++; - grpc_chttp2_list_add_parsing_seen_stream(transport_parsing, - stream_parsing); - } - if (parser->is_eof) { - stream_parsing->received_close = 1; - } - } - parser->on_header = on_header_not_set; - parser->on_header_user_data = NULL; - parser->is_boundary = 0xde; - parser->is_eof = 0xde; - parser->dynamic_table_update_allowed = 2; - } - GPR_TIMER_END("grpc_chttp2_hpack_parser_parse", 0); - return GRPC_CHTTP2_PARSE_OK; -} |