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1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef NET_HTTP2_DECODER_PAYLOAD_DECODERS_GOAWAY_PAYLOAD_DECODER_H_ | |
6 #define NET_HTTP2_DECODER_PAYLOAD_DECODERS_GOAWAY_PAYLOAD_DECODER_H_ | |
7 | |
8 // Decodes the payload of a GOAWAY frame. | |
9 | |
10 // TODO(jamessynge): Sweep through all payload decoders, changing the names of | |
11 // the PayloadState enums so that they are really states, and not actions. | |
12 | |
13 #include "net/base/net_export.h" | |
14 #include "net/http2/decoder/decode_buffer.h" | |
15 #include "net/http2/decoder/decode_status.h" | |
16 #include "net/http2/decoder/frame_decoder_state.h" | |
17 #include "net/http2/http2_structures.h" | |
18 | |
19 namespace net { | |
20 namespace test { | |
21 class GoAwayPayloadDecoderPeer; | |
22 } // namespace test | |
23 | |
24 class NET_EXPORT_PRIVATE GoAwayPayloadDecoder { | |
25 public: | |
26 // States during decoding of a GOAWAY frame. | |
27 enum class PayloadState { | |
28 // At the start of the GOAWAY frame payload, ready to start decoding the | |
29 // fixed size fields into goaway_fields_. | |
30 kStartDecodingFixedFields, | |
31 | |
32 // Handle the DecodeStatus returned from starting or resuming the | |
33 // decoding of Http2GoAwayFields into goaway_fields_. If complete, | |
34 // calls OnGoAwayStart. | |
35 kHandleFixedFieldsStatus, | |
36 | |
37 // Report the Opaque Data portion of the payload to the listener's | |
38 // OnGoAwayOpaqueData method, and call OnGoAwayEnd when the end of the | |
39 // payload is reached. | |
40 kReadOpaqueData, | |
41 | |
42 // The fixed size fields weren't all available when the decoder first | |
43 // tried to decode them (state kStartDecodingFixedFields); this state | |
44 // resumes the decoding when ResumeDecodingPayload is called later. | |
45 kResumeDecodingFixedFields, | |
46 }; | |
47 | |
48 // Starts the decoding of a GOAWAY frame's payload, and completes it if | |
49 // the entire payload is in the provided decode buffer. | |
50 DecodeStatus StartDecodingPayload(FrameDecoderState* state, DecodeBuffer* db); | |
51 | |
52 // Resumes decoding a GOAWAY frame's payload that has been split across | |
53 // decode buffers. | |
54 DecodeStatus ResumeDecodingPayload(FrameDecoderState* state, | |
55 DecodeBuffer* db); | |
56 | |
57 private: | |
58 friend class test::GoAwayPayloadDecoderPeer; | |
59 | |
60 Http2GoAwayFields goaway_fields_; | |
61 PayloadState payload_state_; | |
62 }; | |
63 | |
64 } // namespace net | |
65 | |
66 #endif // NET_HTTP2_DECODER_PAYLOAD_DECODERS_GOAWAY_PAYLOAD_DECODER_H_ | |
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