1 /*
2  *
3  * Copyright 2015 gRPC authors.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *     http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  *
17  */
18 
19 #ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_GOAWAY_H
20 #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_GOAWAY_H
21 
22 #include <grpc/support/port_platform.h>
23 
24 #include <grpc/slice.h>
25 #include <grpc/slice_buffer.h>
26 
27 #include "src/core/ext/transport/chttp2/transport/frame.h"
28 
29 typedef enum {
30   GRPC_CHTTP2_GOAWAY_LSI0,
31   GRPC_CHTTP2_GOAWAY_LSI1,
32   GRPC_CHTTP2_GOAWAY_LSI2,
33   GRPC_CHTTP2_GOAWAY_LSI3,
34   GRPC_CHTTP2_GOAWAY_ERR0,
35   GRPC_CHTTP2_GOAWAY_ERR1,
36   GRPC_CHTTP2_GOAWAY_ERR2,
37   GRPC_CHTTP2_GOAWAY_ERR3,
38   GRPC_CHTTP2_GOAWAY_DEBUG
39 } grpc_chttp2_goaway_parse_state;
40 
41 struct grpc_chttp2_goaway_parser {
42   grpc_chttp2_goaway_parse_state state;
43   uint32_t last_stream_id;
44   uint32_t error_code;
45   char* debug_data;
46   uint32_t debug_length;
47   uint32_t debug_pos;
48 };
49 void grpc_chttp2_goaway_parser_init(grpc_chttp2_goaway_parser* p);
50 void grpc_chttp2_goaway_parser_destroy(grpc_chttp2_goaway_parser* p);
51 grpc_error_handle grpc_chttp2_goaway_parser_begin_frame(
52     grpc_chttp2_goaway_parser* parser, uint32_t length, uint8_t flags);
53 grpc_error_handle grpc_chttp2_goaway_parser_parse(void* parser,
54                                                   grpc_chttp2_transport* t,
55                                                   grpc_chttp2_stream* s,
56                                                   const grpc_slice& slice,
57                                                   int is_last);
58 
59 void grpc_chttp2_goaway_append(uint32_t last_stream_id, uint32_t error_code,
60                                const grpc_slice& debug_data,
61                                grpc_slice_buffer* slice_buffer);
62 
63 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_GOAWAY_H */
64