Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(331)

Issues Search
    My Issues | Starred     Open | Closed | All

Unified Diff: third_party/grpc/src/core/transport/chttp2/hpack_parser.c

Issue 1932353002: Initial checkin of gRPC to third_party/ Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 4 years, 8 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
« no previous file with comments | « third_party/grpc/src/core/transport/chttp2/hpack_parser.h ('k') | third_party/grpc/src/core/transport/chttp2/hpack_table.h » ('j') | no next file with comments »
Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
Index: third_party/grpc/src/core/transport/chttp2/hpack_parser.c
diff --git a/third_party/grpc/src/core/transport/chttp2/hpack_parser.c b/third_party/grpc/src/core/transport/chttp2/hpack_parser.c
new file mode 100644
index 0000000000000000000000000000000000000000..a63c7db1f6137114f86bca493179eb3339473f92
--- /dev/null
+++ b/third_party/grpc/src/core/transport/chttp2/hpack_parser.c
@@ -0,0 +1,1449 @@
+/*
+ *
+ * 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/transport/chttp2/hpack_parser.h"
+#include "src/core/transport/chttp2/internal.h"
+
+#include <stddef.h>
+#include <string.h>
+#include <assert.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/profiling/timers.h"
+#include "src/core/support/string.h"
+#include "src/core/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;
+}
« no previous file with comments | « third_party/grpc/src/core/transport/chttp2/hpack_parser.h ('k') | third_party/grpc/src/core/transport/chttp2/hpack_table.h » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698