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_SRC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_GOAWAY_H
20 #define GRPC_SRC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_GOAWAY_H
21 
22 #include <grpc/support/port_platform.h>
23 
24 #include <stdint.h>
25 
26 #include <grpc/slice.h>
27 
28 #include "src/core/ext/transport/chttp2/transport/frame.h"
29 #include "src/core/lib/iomgr/error.h"
30 
31 typedef enum {
32   GRPC_CHTTP2_GOAWAY_LSI0,
33   GRPC_CHTTP2_GOAWAY_LSI1,
34   GRPC_CHTTP2_GOAWAY_LSI2,
35   GRPC_CHTTP2_GOAWAY_LSI3,
36   GRPC_CHTTP2_GOAWAY_ERR0,
37   GRPC_CHTTP2_GOAWAY_ERR1,
38   GRPC_CHTTP2_GOAWAY_ERR2,
39   GRPC_CHTTP2_GOAWAY_ERR3,
40   GRPC_CHTTP2_GOAWAY_DEBUG
41 } grpc_chttp2_goaway_parse_state;
42 
43 struct grpc_chttp2_goaway_parser {
44   grpc_chttp2_goaway_parse_state state;
45   uint32_t last_stream_id;
46   uint32_t error_code;
47   char* debug_data;
48   uint32_t debug_length;
49   uint32_t debug_pos;
50 };
51 void grpc_chttp2_goaway_parser_init(grpc_chttp2_goaway_parser* p);
52 void grpc_chttp2_goaway_parser_destroy(grpc_chttp2_goaway_parser* p);
53 grpc_error_handle grpc_chttp2_goaway_parser_begin_frame(
54     grpc_chttp2_goaway_parser* parser, uint32_t length, uint8_t flags);
55 grpc_error_handle grpc_chttp2_goaway_parser_parse(void* parser,
56                                                   grpc_chttp2_transport* t,
57                                                   grpc_chttp2_stream* s,
58                                                   const grpc_slice& slice,
59                                                   int is_last);
60 
61 void grpc_chttp2_goaway_append(uint32_t last_stream_id, uint32_t error_code,
62                                const grpc_slice& debug_data,
63                                grpc_slice_buffer* slice_buffer);
64 
65 #endif  // GRPC_SRC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_GOAWAY_H
66