| /* |
| * |
| * 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. |
| * |
| */ |
| |
| #ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_PARSER_H |
| #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_PARSER_H |
| |
| #include <stddef.h> |
| |
| #include <grpc/support/port_platform.h> |
| #include "src/core/ext/transport/chttp2/transport/frame.h" |
| #include "src/core/ext/transport/chttp2/transport/hpack_table.h" |
| #include "src/core/lib/iomgr/exec_ctx.h" |
| #include "src/core/lib/transport/metadata.h" |
| |
| typedef struct grpc_chttp2_hpack_parser grpc_chttp2_hpack_parser; |
| |
| typedef grpc_error *(*grpc_chttp2_hpack_parser_state)( |
| grpc_exec_ctx *exec_ctx, grpc_chttp2_hpack_parser *p, const uint8_t *beg, |
| const uint8_t *end); |
| |
| typedef struct { |
| char *str; |
| uint32_t length; |
| uint32_t capacity; |
| } grpc_chttp2_hpack_parser_string; |
| |
| struct grpc_chttp2_hpack_parser { |
| /* user specified callback for each header output */ |
| void (*on_header)(grpc_exec_ctx *exec_ctx, void *user_data, grpc_mdelem *md); |
| void *on_header_user_data; |
| |
| grpc_error *last_error; |
| |
| /* current parse state - or a function that implements it */ |
| grpc_chttp2_hpack_parser_state state; |
| /* future states dependent on the opening op code */ |
| const grpc_chttp2_hpack_parser_state *next_state; |
| /* what to do after skipping prioritization data */ |
| grpc_chttp2_hpack_parser_state after_prioritization; |
| /* the value we're currently parsing */ |
| union { |
| uint32_t *value; |
| grpc_chttp2_hpack_parser_string *str; |
| } parsing; |
| /* string parameters for each chunk */ |
| grpc_chttp2_hpack_parser_string key; |
| grpc_chttp2_hpack_parser_string value; |
| /* parsed index */ |
| uint32_t index; |
| /* length of source bytes for the currently parsing string */ |
| uint32_t strlen; |
| /* number of source bytes read for the currently parsing string */ |
| uint32_t strgot; |
| /* huffman decoding state */ |
| int16_t huff_state; |
| /* is the string being decoded binary? */ |
| uint8_t binary; |
| /* is the current string huffman encoded? */ |
| uint8_t huff; |
| /* is a dynamic table update allowed? */ |
| uint8_t dynamic_table_update_allowed; |
| /* set by higher layers, used by grpc_chttp2_header_parser_parse to signal |
| it should append a metadata boundary at the end of frame */ |
| uint8_t is_boundary; |
| uint8_t is_eof; |
| uint32_t base64_buffer; |
| |
| /* hpack table */ |
| grpc_chttp2_hptbl table; |
| }; |
| |
| void grpc_chttp2_hpack_parser_init(grpc_exec_ctx *exec_ctx, |
| grpc_chttp2_hpack_parser *p); |
| void grpc_chttp2_hpack_parser_destroy(grpc_exec_ctx *exec_ctx, |
| grpc_chttp2_hpack_parser *p); |
| |
| void grpc_chttp2_hpack_parser_set_has_priority(grpc_chttp2_hpack_parser *p); |
| |
| /* returns 1 on success, 0 on error */ |
| grpc_error *grpc_chttp2_hpack_parser_parse(grpc_exec_ctx *exec_ctx, |
| grpc_chttp2_hpack_parser *p, |
| const uint8_t *beg, |
| const uint8_t *end); |
| |
| /* wraps grpc_chttp2_hpack_parser_parse to provide a frame level parser for |
| the transport */ |
| grpc_error *grpc_chttp2_header_parser_parse(grpc_exec_ctx *exec_ctx, |
| void *hpack_parser, |
| grpc_chttp2_transport *t, |
| grpc_chttp2_stream *s, |
| grpc_slice slice, int is_last); |
| |
| #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_PARSER_H */ |