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frame_data.h
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1 /*
2 *
3 * Copyright 2015, Google Inc.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following disclaimer
14 * in the documentation and/or other materials provided with the
15 * distribution.
16 * * Neither the name of Google Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 */
33
34 #ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_DATA_H
35 #define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_DATA_H
36
37 /* Parser for GRPC streams embedded in DATA frames */
38
39 #include <grpc/support/slice.h>
40 #include <grpc/support/slice_buffer.h>
41 #include "src/core/transport/stream_op.h"
42 #include "src/core/transport/chttp2/frame.h"
43
44 typedef enum {
45 GRPC_CHTTP2_DATA_FH_0,
46 GRPC_CHTTP2_DATA_FH_1,
47 GRPC_CHTTP2_DATA_FH_2,
48 GRPC_CHTTP2_DATA_FH_3,
49 GRPC_CHTTP2_DATA_FH_4,
50 GRPC_CHTTP2_DATA_FRAME
51 } grpc_chttp2_stream_state;
52
53 typedef struct {
54 grpc_chttp2_stream_state state;
55 gpr_uint8 is_last_frame;
56 gpr_uint8 frame_type;
57 gpr_uint32 frame_size;
58
59 int is_frame_compressed;
60 grpc_stream_op_buffer incoming_sopb;
61 } grpc_chttp2_data_parser;
62
63 /* initialize per-stream state for data frame parsing */
64 grpc_chttp2_parse_error grpc_chttp2_data_parser_init(
65 grpc_chttp2_data_parser *parser);
66
67 void grpc_chttp2_data_parser_destroy(grpc_chttp2_data_parser *parser);
68
69 /* start processing a new data frame */
70 grpc_chttp2_parse_error grpc_chttp2_data_parser_begin_frame(
71 grpc_chttp2_data_parser *parser, gpr_uint8 flags);
72
73 /* handle a slice of a data frame - is_last indicates the last slice of a
74 frame */
75 grpc_chttp2_parse_error grpc_chttp2_data_parser_parse(
76 void *parser, grpc_chttp2_transport_parsing *transport_parsing,
77 grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last);
78
79 /* create a slice with an empty data frame and is_last set */
80 gpr_slice grpc_chttp2_data_frame_create_empty_close(gpr_uint32 id);
81
82 #endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_DATA_H */
gpr_uint8
uint8_t gpr_uint8
Definition: port_platform.h:307
grpc_chttp2_stream_state
grpc_chttp2_stream_state
Definition: frame_data.h:44
grpc_chttp2_data_parser_begin_frame
grpc_chttp2_parse_error grpc_chttp2_data_parser_begin_frame(grpc_chttp2_data_parser *parser, gpr_uint8 flags)
Definition: frame_data.c:56
grpc_chttp2_parse_error
grpc_chttp2_parse_error
Definition: frame.h:42
gpr_uint32
uint32_t gpr_uint32
Definition: port_platform.h:309
grpc_chttp2_data_parser::is_frame_compressed
int is_frame_compressed
Definition: frame_data.h:59
grpc_chttp2_data_parser::incoming_sopb
grpc_stream_op_buffer incoming_sopb
Definition: frame_data.h:60
GRPC_CHTTP2_DATA_FRAME
Definition: frame_data.h:50
GRPC_CHTTP2_DATA_FH_4
Definition: frame_data.h:49
grpc_chttp2_data_parser::state
grpc_chttp2_stream_state state
Definition: frame_data.h:54
grpc_chttp2_data_parser_init
grpc_chttp2_parse_error grpc_chttp2_data_parser_init(grpc_chttp2_data_parser *parser)
Definition: frame_data.c:45
frame.h
GRPC_CHTTP2_DATA_FH_3
Definition: frame_data.h:48
grpc_chttp2_transport_parsing
Definition: internal.h:215
GRPC_CHTTP2_DATA_FH_1
Definition: frame_data.h:46
grpc_chttp2_data_parser::frame_size
gpr_uint32 frame_size
Definition: frame_data.h:57
slice_buffer.h
grpc_chttp2_stream_parsing
Definition: internal.h:412
grpc_chttp2_data_parser_destroy
void grpc_chttp2_data_parser_destroy(grpc_chttp2_data_parser *parser)
Definition: frame_data.c:52
slice.h
grpc_chttp2_data_parser
Definition: frame_data.h:53
grpc_chttp2_data_frame_create_empty_close
gpr_slice grpc_chttp2_data_frame_create_empty_close(gpr_uint32 id)
Definition: stream_encoder.c:449
GRPC_CHTTP2_DATA_FH_2
Definition: frame_data.h:47
grpc_chttp2_data_parser_parse
grpc_chttp2_parse_error grpc_chttp2_data_parser_parse(void *parser, grpc_chttp2_transport_parsing *transport_parsing, grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last)
Definition: frame_data.c:72
GRPC_CHTTP2_DATA_FH_0
Definition: frame_data.h:45
grpc_chttp2_data_parser::frame_type
gpr_uint8 frame_type
Definition: frame_data.h:56
stream_op.h
grpc_stream_op_buffer
A stream op buffer is a wrapper around stream operations that is dynamically extendable.
Definition: stream_op.h:176
gpr_slice
Definition: slice.h:79
grpc_chttp2_data_parser::is_last_frame
gpr_uint8 is_last_frame
Definition: frame_data.h:55