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/*
*
* 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.
*
*/
#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_DATA_H
#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_DATA_H
/* Parser for GRPC streams embedded in DATA frames */
#include <grpc/support/slice.h>
#include <grpc/support/slice_buffer.h>
#include "src/core/ext/transport/chttp2/transport/frame.h"
#include "src/core/lib/iomgr/exec_ctx.h"
#include "src/core/lib/transport/byte_stream.h"
typedef enum {
GRPC_CHTTP2_DATA_FH_0,
GRPC_CHTTP2_DATA_FH_1,
GRPC_CHTTP2_DATA_FH_2,
GRPC_CHTTP2_DATA_FH_3,
GRPC_CHTTP2_DATA_FH_4,
GRPC_CHTTP2_DATA_FRAME
} grpc_chttp2_stream_state;
typedef struct grpc_chttp2_incoming_byte_stream
grpc_chttp2_incoming_byte_stream;
typedef struct grpc_chttp2_incoming_frame_queue {
grpc_chttp2_incoming_byte_stream *head;
grpc_chttp2_incoming_byte_stream *tail;
} grpc_chttp2_incoming_frame_queue;
typedef struct {
grpc_chttp2_stream_state state;
uint8_t is_last_frame;
uint8_t frame_type;
uint32_t frame_size;
int is_frame_compressed;
grpc_chttp2_incoming_frame_queue incoming_frames;
grpc_chttp2_incoming_byte_stream *parsing_frame;
} grpc_chttp2_data_parser;
void grpc_chttp2_incoming_frame_queue_merge(
grpc_chttp2_incoming_frame_queue *head_dst,
grpc_chttp2_incoming_frame_queue *tail_src);
grpc_byte_stream *grpc_chttp2_incoming_frame_queue_pop(
grpc_chttp2_incoming_frame_queue *q);
/* initialize per-stream state for data frame parsing */
grpc_chttp2_parse_error grpc_chttp2_data_parser_init(
grpc_chttp2_data_parser *parser);
void grpc_chttp2_data_parser_destroy(grpc_exec_ctx *exec_ctx,
grpc_chttp2_data_parser *parser);
/* start processing a new data frame */
grpc_chttp2_parse_error grpc_chttp2_data_parser_begin_frame(
grpc_chttp2_data_parser *parser, uint8_t flags);
/* handle a slice of a data frame - is_last indicates the last slice of a
frame */
grpc_chttp2_parse_error grpc_chttp2_data_parser_parse(
grpc_exec_ctx *exec_ctx, void *parser,
grpc_chttp2_transport_parsing *transport_parsing,
grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last);
void grpc_chttp2_encode_data(uint32_t id, gpr_slice_buffer *inbuf,
uint32_t write_bytes, int is_eof,
gpr_slice_buffer *outbuf);
#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_DATA_H */
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