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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/frame_decoder_state.h" | |
| 6 | |
| 7 namespace net { | |
| 8 | |
| 9 DecodeStatus FrameDecoderState::ReadPadLength(DecodeBuffer* db, | |
| 10 bool report_pad_length) { | |
| 11 DVLOG(2) << "ReadPadLength db->Remaining=" << db->Remaining() | |
| 12 << "; payload_length=" << frame_header().payload_length; | |
| 13 DCHECK(IsPaddable()); | |
| 14 DCHECK(frame_header().IsPadded()); | |
| 15 | |
| 16 // Pad Length is always at the start of the frame, so remaining_payload_ | |
| 17 // should equal payload_length at this point. | |
| 18 const uint32_t total_payload = frame_header().payload_length; | |
| 19 DCHECK_EQ(total_payload, remaining_payload_); | |
| 20 DCHECK_EQ(0u, remaining_padding_); | |
| 21 | |
| 22 if (db->HasData()) { | |
| 23 const uint32_t pad_length = db->DecodeUInt8(); | |
| 24 const uint32_t total_padding = pad_length + 1; | |
| 25 if (total_padding <= total_payload) { | |
| 26 remaining_padding_ = pad_length; | |
| 27 remaining_payload_ = total_payload - total_padding; | |
| 28 if (report_pad_length) { | |
| 29 listener()->OnPadLength(pad_length); | |
| 30 } | |
| 31 return DecodeStatus::kDecodeDone; | |
| 32 } | |
| 33 const uint32_t missing_length = total_padding - total_payload; | |
| 34 // To allow for the possibility of recovery, record the number of | |
| 35 // remaining bytes of the frame's payload (invalid though it is) | |
| 36 // in remaining_payload_. | |
| 37 remaining_payload_ = total_payload - 1; // 1 for sizeof(Pad Length). | |
| 38 remaining_padding_ = 0; | |
| 39 listener()->OnPaddingTooLong(frame_header(), missing_length); | |
| 40 return DecodeStatus::kDecodeError; | |
| 41 } | |
| 42 | |
| 43 if (total_payload == 0) { | |
| 44 remaining_payload_ = 0; | |
| 45 remaining_padding_ = 0; | |
| 46 listener()->OnPaddingTooLong(frame_header(), 1); | |
| 47 return DecodeStatus::kDecodeError; | |
| 48 } | |
| 49 // Need to wait for another buffer. | |
| 50 return DecodeStatus::kDecodeInProgress; | |
| 51 } | |
| 52 | |
| 53 bool FrameDecoderState::SkipPadding(DecodeBuffer* db) { | |
| 54 DVLOG(2) << "SkipPadding remaining_padding_=" << remaining_padding_ | |
| 55 << ", db->Remaining=" << db->Remaining() | |
| 56 << ", header: " << frame_header(); | |
| 57 DCHECK_EQ(remaining_payload_, 0u); | |
| 58 DCHECK(IsPaddable()) << "header: " << frame_header(); | |
| 59 DCHECK_GE(remaining_padding_, 0u); | |
| 60 DCHECK(remaining_padding_ == 0 || frame_header().IsPadded()) | |
| 61 << "remaining_padding_=" << remaining_padding_ | |
| 62 << ", header: " << frame_header(); | |
| 63 const size_t avail = AvailablePadding(db); | |
| 64 if (avail > 0) { | |
| 65 listener()->OnPadding(db->cursor(), avail); | |
| 66 db->AdvanceCursor(avail); | |
| 67 remaining_padding_ -= avail; | |
| 68 } | |
| 69 return remaining_padding_ == 0; | |
| 70 } | |
| 71 | |
| 72 DecodeStatus FrameDecoderState::ReportFrameSizeError() { | |
| 73 DVLOG(2) << "FrameDecoderState::ReportFrameSizeError: " | |
| 74 << " remaining_payload_=" << remaining_payload_ | |
| 75 << "; remaining_padding_=" << remaining_padding_ | |
| 76 << ", header: " << frame_header(); | |
| 77 listener()->OnFrameSizeError(frame_header()); | |
| 78 return DecodeStatus::kDecodeError; | |
| 79 } | |
| 80 | |
| 81 } // namespace net | |
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Chromium Code Reviews
Issue 2554683003:
Revert of Add new HTTP/2 and HPACK decoder in net/http2/. (Closed)
