| /* |
| * |
| * Copyright 2015, 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/transport/chttp2/hpack_parser.h" |
| #include "src/core/transport/chttp2/internal.h" |
| |
| #include <stddef.h> |
| #include <string.h> |
| #include <assert.h> |
| |
| #include "src/core/transport/chttp2/bin_encoder.h" |
| #include "src/core/support/string.h" |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/port_platform.h> |
| #include <grpc/support/useful.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 gpr_uint8 *cur, |
| const gpr_uint8 *end); |
| static int parse_error(grpc_chttp2_hpack_parser *p, const gpr_uint8 *cur, |
| const gpr_uint8 *end); |
| |
| static int parse_string_prefix(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, const gpr_uint8 *end); |
| static int parse_key_string(grpc_chttp2_hpack_parser *p, const gpr_uint8 *cur, |
| const gpr_uint8 *end); |
| static int parse_value_string_with_indexed_key(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, |
| const gpr_uint8 *end); |
| static int parse_value_string_with_literal_key(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, |
| const gpr_uint8 *end); |
| |
| static int parse_value0(grpc_chttp2_hpack_parser *p, const gpr_uint8 *cur, |
| const gpr_uint8 *end); |
| static int parse_value1(grpc_chttp2_hpack_parser *p, const gpr_uint8 *cur, |
| const gpr_uint8 *end); |
| static int parse_value2(grpc_chttp2_hpack_parser *p, const gpr_uint8 *cur, |
| const gpr_uint8 *end); |
| static int parse_value3(grpc_chttp2_hpack_parser *p, const gpr_uint8 *cur, |
| const gpr_uint8 *end); |
| static int parse_value4(grpc_chttp2_hpack_parser *p, const gpr_uint8 *cur, |
| const gpr_uint8 *end); |
| static int parse_value5up(grpc_chttp2_hpack_parser *p, const gpr_uint8 *cur, |
| const gpr_uint8 *end); |
| |
| static int parse_indexed_field(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, const gpr_uint8 *end); |
| static int parse_indexed_field_x(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, const gpr_uint8 *end); |
| static int parse_lithdr_incidx(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, const gpr_uint8 *end); |
| static int parse_lithdr_incidx_x(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, const gpr_uint8 *end); |
| static int parse_lithdr_incidx_v(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, const gpr_uint8 *end); |
| static int parse_lithdr_notidx(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, const gpr_uint8 *end); |
| static int parse_lithdr_notidx_x(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, const gpr_uint8 *end); |
| static int parse_lithdr_notidx_v(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, const gpr_uint8 *end); |
| static int parse_lithdr_nvridx(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, const gpr_uint8 *end); |
| static int parse_lithdr_nvridx_x(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, const gpr_uint8 *end); |
| static int parse_lithdr_nvridx_v(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, const gpr_uint8 *end); |
| static int parse_max_tbl_size(grpc_chttp2_hpack_parser *p, const gpr_uint8 *cur, |
| const gpr_uint8 *end); |
| static int parse_max_tbl_size_x(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, const gpr_uint8 *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_error}; |
| |
| /* indexes the first byte to a parse state function - generated by |
| gen_hpack_tables.c */ |
| static const gpr_uint8 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, |
| ILLEGAL, 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 gpr_uint8 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 gpr_int16 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 gpr_uint16 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 gpr_int16 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 gpr_uint8 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 void on_hdr(grpc_chttp2_hpack_parser *p, grpc_mdelem *md, |
| int add_to_table) { |
| if (add_to_table) { |
| grpc_mdelem_ref(md); |
| grpc_chttp2_hptbl_add(&p->table, md); |
| } |
| p->on_header(p->on_header_user_data, md); |
| } |
| |
| static grpc_mdstr *take_string(grpc_chttp2_hpack_parser *p, |
| grpc_chttp2_hpack_parser_string *str) { |
| grpc_mdstr *s = grpc_mdstr_from_buffer(p->table.mdctx, (gpr_uint8 *)str->str, |
| str->length); |
| str->length = 0; |
| return s; |
| } |
| |
| /* jump to the next state */ |
| static int parse_next(grpc_chttp2_hpack_parser *p, const gpr_uint8 *cur, |
| const gpr_uint8 *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 gpr_uint8 *cur, |
| const gpr_uint8 *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 gpr_uint8 *cur, const gpr_uint8 *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 gpr_uint8 *cur, |
| const gpr_uint8 *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 gpr_uint8 *cur, |
| const gpr_uint8 *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 gpr_uint8 *cur, |
| const gpr_uint8 *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 gpr_uint8 *cur, |
| const gpr_uint8 *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 gpr_uint8 *cur, const gpr_uint8 *end) { |
| grpc_mdelem *md = grpc_chttp2_hptbl_lookup(&p->table, p->index); |
| grpc_mdelem_ref(md); |
| on_hdr(p, md, 0); |
| return parse_begin(p, cur, end); |
| } |
| |
| /* parse an indexed field with index < 127 */ |
| static int parse_indexed_field(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, const gpr_uint8 *end) { |
| 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 gpr_uint8 *cur, const gpr_uint8 *end) { |
| static const grpc_chttp2_hpack_parser_state and_then[] = { |
| finish_indexed_field}; |
| 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 gpr_uint8 *cur, const gpr_uint8 *end) { |
| grpc_mdelem *md = grpc_chttp2_hptbl_lookup(&p->table, p->index); |
| on_hdr(p, grpc_mdelem_from_metadata_strings(p->table.mdctx, |
| grpc_mdstr_ref(md->key), |
| take_string(p, &p->value)), |
| 1); |
| return 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 gpr_uint8 *cur, const gpr_uint8 *end) { |
| on_hdr(p, grpc_mdelem_from_metadata_strings(p->table.mdctx, |
| take_string(p, &p->key), |
| take_string(p, &p->value)), |
| 1); |
| return 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 gpr_uint8 *cur, const gpr_uint8 *end) { |
| static const grpc_chttp2_hpack_parser_state and_then[] = { |
| parse_value_string_with_indexed_key, finish_lithdr_incidx}; |
| 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 gpr_uint8 *cur, const gpr_uint8 *end) { |
| static const grpc_chttp2_hpack_parser_state and_then[] = { |
| parse_string_prefix, parse_value_string_with_indexed_key, |
| finish_lithdr_incidx}; |
| 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 gpr_uint8 *cur, const gpr_uint8 *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->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 gpr_uint8 *cur, const gpr_uint8 *end) { |
| grpc_mdelem *md = grpc_chttp2_hptbl_lookup(&p->table, p->index); |
| on_hdr(p, grpc_mdelem_from_metadata_strings(p->table.mdctx, |
| grpc_mdstr_ref(md->key), |
| take_string(p, &p->value)), |
| 0); |
| return 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 gpr_uint8 *cur, const gpr_uint8 *end) { |
| on_hdr(p, grpc_mdelem_from_metadata_strings(p->table.mdctx, |
| take_string(p, &p->key), |
| take_string(p, &p->value)), |
| 0); |
| return 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 gpr_uint8 *cur, const gpr_uint8 *end) { |
| static const grpc_chttp2_hpack_parser_state and_then[] = { |
| parse_value_string_with_indexed_key, finish_lithdr_notidx}; |
| 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 gpr_uint8 *cur, const gpr_uint8 *end) { |
| static const grpc_chttp2_hpack_parser_state and_then[] = { |
| parse_string_prefix, parse_value_string_with_indexed_key, |
| finish_lithdr_notidx}; |
| 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 gpr_uint8 *cur, const gpr_uint8 *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->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 gpr_uint8 *cur, const gpr_uint8 *end) { |
| grpc_mdelem *md = grpc_chttp2_hptbl_lookup(&p->table, p->index); |
| on_hdr(p, grpc_mdelem_from_metadata_strings(p->table.mdctx, |
| grpc_mdstr_ref(md->key), |
| take_string(p, &p->value)), |
| 0); |
| return 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 gpr_uint8 *cur, const gpr_uint8 *end) { |
| on_hdr(p, grpc_mdelem_from_metadata_strings(p->table.mdctx, |
| take_string(p, &p->key), |
| take_string(p, &p->value)), |
| 0); |
| return 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 gpr_uint8 *cur, const gpr_uint8 *end) { |
| static const grpc_chttp2_hpack_parser_state and_then[] = { |
| parse_value_string_with_indexed_key, finish_lithdr_nvridx}; |
| 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 gpr_uint8 *cur, const gpr_uint8 *end) { |
| static const grpc_chttp2_hpack_parser_state and_then[] = { |
| parse_string_prefix, parse_value_string_with_indexed_key, |
| finish_lithdr_nvridx}; |
| 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 gpr_uint8 *cur, const gpr_uint8 *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->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 gpr_uint8 *cur, const gpr_uint8 *end) { |
| gpr_log(GPR_INFO, "MAX TABLE SIZE: %d", p->index); |
| abort(); /* not implemented */ |
| return 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 gpr_uint8 *cur, |
| const gpr_uint8 *end) { |
| p->index = (*cur) & 0xf; |
| 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 gpr_uint8 *cur, const gpr_uint8 *end) { |
| static const grpc_chttp2_hpack_parser_state and_then[] = { |
| finish_max_tbl_size}; |
| p->next_state = and_then; |
| p->index = 0xf; |
| 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 gpr_uint8 *cur, |
| const gpr_uint8 *end) { |
| p->state = parse_error; |
| return 0; |
| } |
| |
| /* 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 gpr_uint8 *cur, |
| const gpr_uint8 *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 gpr_uint8 *cur, |
| const gpr_uint8 *end) { |
| if (cur == end) { |
| p->state = parse_value1; |
| return 1; |
| } |
| |
| *p->parsing.value += (((gpr_uint32)*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 gpr_uint8 *cur, |
| const gpr_uint8 *end) { |
| if (cur == end) { |
| p->state = parse_value2; |
| return 1; |
| } |
| |
| *p->parsing.value += (((gpr_uint32)*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 gpr_uint8 *cur, |
| const gpr_uint8 *end) { |
| if (cur == end) { |
| p->state = parse_value3; |
| return 1; |
| } |
| |
| *p->parsing.value += (((gpr_uint32)*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 gpr_uint8 *cur, |
| const gpr_uint8 *end) { |
| gpr_uint8 c; |
| gpr_uint32 cur_value; |
| gpr_uint32 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 = ((gpr_uint32)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", |
| *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 gpr_uint8 *cur, |
| const gpr_uint8 *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 4"); |
| return parse_error(p, cur, end); |
| } |
| |
| /* parse a string prefix */ |
| static int parse_string_prefix(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, const gpr_uint8 *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 gpr_uint8 *data, size_t length) { |
| if (length + str->length > str->capacity) { |
| str->capacity = str->length + length; |
| str->str = gpr_realloc(str->str, str->capacity); |
| } |
| memcpy(str->str + str->length, data, length); |
| str->length += length; |
| } |
| |
| static int append_string(grpc_chttp2_hpack_parser *p, const gpr_uint8 *cur, |
| const gpr_uint8 *end) { |
| grpc_chttp2_hpack_parser_string *str = p->parsing.str; |
| gpr_uint32 bits; |
| gpr_uint8 decoded[3]; |
| switch ((binary_state)p->binary) { |
| case NOT_BINARY: |
| append_bytes(str, cur, 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] = bits >> 16; |
| decoded[1] = bits >> 8; |
| decoded[2] = bits; |
| append_bytes(str, decoded, 3); |
| goto b64_byte0; |
| } |
| gpr_log(GPR_ERROR, "should never reach here"); |
| abort(); |
| return 1; |
| } |
| |
| /* append a null terminator to a string */ |
| static int finish_str(grpc_chttp2_hpack_parser *p) { |
| gpr_uint8 terminator = 0; |
| gpr_uint8 decoded[2]; |
| gpr_uint32 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] = 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] = bits >> 16; |
| decoded[1] = 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, gpr_uint8 nibble) { |
| gpr_int16 emit = emit_sub_tbl[16 * emit_tbl[p->huff_state] + nibble]; |
| gpr_int16 next = next_sub_tbl[16 * next_tbl[p->huff_state] + nibble]; |
| if (emit != -1) { |
| if (emit >= 0 && emit < 256) { |
| gpr_uint8 c = (gpr_uint8)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 gpr_uint8 *cur, |
| const gpr_uint8 *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 gpr_uint8 *cur, |
| const gpr_uint8 *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 gpr_uint8 *cur, |
| const gpr_uint8 *end) { |
| size_t remaining = p->strlen - p->strgot; |
| size_t given = 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; |
| p->strgot += 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 gpr_uint8 *cur, |
| const gpr_uint8 *end, gpr_uint8 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 gpr_uint8 *cur, |
| const gpr_uint8 *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) 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 gpr_uint8 *cur, |
| const gpr_uint8 *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_log(GPR_ERROR, "Should never reach beyond switch in parse_value_string"); |
| abort(); |
| return 0; |
| } |
| |
| static int parse_value_string_with_indexed_key(grpc_chttp2_hpack_parser *p, |
| const gpr_uint8 *cur, |
| const gpr_uint8 *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 gpr_uint8 *cur, |
| const gpr_uint8 *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) { |
| char *keyhex = |
| gpr_hexdump(grpc_mdstr_as_c_string(md->key), |
| GPR_SLICE_LENGTH(md->key->slice), GPR_HEXDUMP_PLAINTEXT); |
| char *valuehex = |
| gpr_hexdump(grpc_mdstr_as_c_string(md->value), |
| GPR_SLICE_LENGTH(md->value->slice), GPR_HEXDUMP_PLAINTEXT); |
| gpr_log(GPR_ERROR, "on_header callback not set; key=%s value=%s", keyhex, |
| valuehex); |
| gpr_free(keyhex); |
| gpr_free(valuehex); |
| grpc_mdelem_unref(md); |
| abort(); |
| } |
| |
| void grpc_chttp2_hpack_parser_init(grpc_chttp2_hpack_parser *p, |
| grpc_mdctx *mdctx) { |
| 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; |
| grpc_chttp2_hptbl_init(&p->table, mdctx); |
| } |
| |
| 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 gpr_uint8 *beg, const gpr_uint8 *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( |
| 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; |
| if (!grpc_chttp2_hpack_parser_parse(parser, GPR_SLICE_START_PTR(slice), |
| GPR_SLICE_END_PTR(slice))) { |
| 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"); |
| return GRPC_CHTTP2_CONNECTION_ERROR; |
| } |
| if (parser->is_boundary) { |
| grpc_chttp2_parsing_add_metadata_batch(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; |
| } |
| return GRPC_CHTTP2_PARSE_OK; |
| } |