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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 #include "net/http2/decoder/payload_decoders/goaway_payload_decoder.h" | |
| 6 | |
| 7 #include <stddef.h> | |
| 8 | |
| 9 #include "base/logging.h" | |
| 10 #include "base/macros.h" | |
| 11 #include "net/http2/decoder/decode_buffer.h" | |
| 12 #include "net/http2/decoder/http2_frame_decoder_listener.h" | |
| 13 #include "net/http2/http2_constants.h" | |
| 14 #include "net/http2/http2_structures.h" | |
| 15 #include "net/http2/tools/http2_bug_tracker.h" | |
| 16 | |
| 17 namespace net { | |
| 18 | |
| 19 std::ostream& operator<<(std::ostream& out, | |
| 20 GoAwayPayloadDecoder::PayloadState v) { | |
| 21 switch (v) { | |
| 22 case GoAwayPayloadDecoder::PayloadState::kStartDecodingFixedFields: | |
| 23 return out << "kStartDecodingFixedFields"; | |
| 24 case GoAwayPayloadDecoder::PayloadState::kHandleFixedFieldsStatus: | |
| 25 return out << "kHandleFixedFieldsStatus"; | |
| 26 case GoAwayPayloadDecoder::PayloadState::kReadOpaqueData: | |
| 27 return out << "kReadOpaqueData"; | |
| 28 case GoAwayPayloadDecoder::PayloadState::kResumeDecodingFixedFields: | |
| 29 return out << "kResumeDecodingFixedFields"; | |
| 30 } | |
| 31 | |
| 32 NOTREACHED(); | |
| 33 return out; | |
| 34 } | |
| 35 | |
| 36 DecodeStatus GoAwayPayloadDecoder::StartDecodingPayload( | |
| 37 FrameDecoderState* state, | |
| 38 DecodeBuffer* db) { | |
| 39 DVLOG(2) << "GoAwayPayloadDecoder::StartDecodingPayload: " | |
| 40 << state->frame_header(); | |
| 41 DCHECK_EQ(Http2FrameType::GOAWAY, state->frame_header().type); | |
| 42 DCHECK_LE(db->Remaining(), state->frame_header().payload_length); | |
| 43 DCHECK_EQ(0, state->frame_header().flags); | |
| 44 | |
| 45 state->InitializeRemainders(); | |
| 46 payload_state_ = PayloadState::kStartDecodingFixedFields; | |
| 47 return ResumeDecodingPayload(state, db); | |
| 48 } | |
| 49 | |
| 50 DecodeStatus GoAwayPayloadDecoder::ResumeDecodingPayload( | |
| 51 FrameDecoderState* state, | |
| 52 DecodeBuffer* db) { | |
| 53 DVLOG(2) << "GoAwayPayloadDecoder::ResumeDecodingPayload: remaining_payload=" | |
| 54 << state->remaining_payload() | |
| 55 << ", db->Remaining=" << db->Remaining(); | |
| 56 | |
| 57 const Http2FrameHeader& frame_header = state->frame_header(); | |
| 58 DCHECK_EQ(Http2FrameType::GOAWAY, frame_header.type); | |
| 59 DCHECK_LE(db->Remaining(), frame_header.payload_length); | |
| 60 DCHECK_NE(PayloadState::kHandleFixedFieldsStatus, payload_state_); | |
| 61 | |
| 62 // |status| has to be initialized to some value to avoid compiler error in | |
| 63 // case PayloadState::kHandleFixedFieldsStatus below, but value does not | |
| 64 // matter, see DCHECK_NE above. | |
| 65 DecodeStatus status = DecodeStatus::kDecodeError; | |
| 66 size_t avail; | |
| 67 while (true) { | |
| 68 DVLOG(2) << "GoAwayPayloadDecoder::ResumeDecodingPayload payload_state_=" | |
| 69 << payload_state_; | |
| 70 switch (payload_state_) { | |
| 71 case PayloadState::kStartDecodingFixedFields: | |
| 72 status = state->StartDecodingStructureInPayload(&goaway_fields_, db); | |
| 73 // FALLTHROUGH_INTENDED | |
| 74 | |
| 75 case PayloadState::kHandleFixedFieldsStatus: | |
| 76 if (status == DecodeStatus::kDecodeDone) { | |
| 77 state->listener()->OnGoAwayStart(frame_header, goaway_fields_); | |
| 78 } else { | |
| 79 // Not done decoding the structure. Either we've got more payload | |
| 80 // to decode, or we've run out because the payload is too short, | |
| 81 // in which case OnFrameSizeError will have already been called. | |
| 82 DCHECK((status == DecodeStatus::kDecodeInProgress && | |
| 83 state->remaining_payload() > 0) || | |
| 84 (status == DecodeStatus::kDecodeError && | |
| 85 state->remaining_payload() == 0)) | |
| 86 << "\n status=" << status | |
| 87 << "; remaining_payload=" << state->remaining_payload(); | |
| 88 payload_state_ = PayloadState::kResumeDecodingFixedFields; | |
| 89 return status; | |
| 90 } | |
| 91 // FALLTHROUGH_INTENDED | |
| 92 | |
| 93 case PayloadState::kReadOpaqueData: | |
| 94 // The opaque data is all the remains to be decoded, so anything left | |
| 95 // in the decode buffer is opaque data. | |
| 96 avail = db->Remaining(); | |
| 97 if (avail > 0) { | |
| 98 state->listener()->OnGoAwayOpaqueData(db->cursor(), avail); | |
| 99 db->AdvanceCursor(avail); | |
| 100 state->ConsumePayload(avail); | |
| 101 } | |
| 102 if (state->remaining_payload() > 0) { | |
| 103 payload_state_ = PayloadState::kReadOpaqueData; | |
| 104 return DecodeStatus::kDecodeInProgress; | |
| 105 } | |
| 106 state->listener()->OnGoAwayEnd(); | |
| 107 return DecodeStatus::kDecodeDone; | |
| 108 | |
| 109 case PayloadState::kResumeDecodingFixedFields: | |
| 110 status = state->ResumeDecodingStructureInPayload(&goaway_fields_, db); | |
| 111 payload_state_ = PayloadState::kHandleFixedFieldsStatus; | |
| 112 continue; | |
| 113 } | |
| 114 HTTP2_BUG << "PayloadState: " << payload_state_; | |
| 115 } | |
| 116 } | |
| 117 | |
| 118 } // namespace net | |
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Chromium Code Reviews
Issue 2554683003:
Revert of Add new HTTP/2 and HPACK decoder in net/http2/. (Closed)
