commit 4e4401033cb2227b62445949de098499fee1506e
author bnc <bnc@google.com> Tue Oct 20 17:32:29 2020 -0700
committer Copybara-Service <copybara-worker@google.com> Tue Oct 20 17:33:00 2020 -0700
tree 94c487bdf6c4e4f193a1fca312e1d737c61b0670
parent b650d8fa6c391b5f55e5736f3a23d863744861d4

Introduce granular QPACK encoder/decoder stream error codes.

Add new error codes to QpackInstructionDecoder.  This class is used by
QpackEncoderStreamReceived to decode the encoder stream, by
QpackDecoderStreamReceived to decode the decoder stream, and by
QpackProgressiveDecoder to decode header blocks.  Ignore error codes in
QpackProgressiveDecoder because header block decoding errors are stream errors,
not connection close errors, and unlike CONNECTION_CLOSE frames, RESET_STREAM
frames are not able to convey any extra information other than the mandatory
generic error code.  Convert QpackInstructionDecoder::ErrorCode error codes to
newly added QuicErrorCodes in
QpackEncoderStreamReceiver::OnInstructionDecodingError() and
QpackDecoderStreamReceiver::OnInstructionDecodingError().

QPACK encoder stream errors are detected in QpackEncoderStreamReceiver and in
QpackDecoder.  Swap all QuicErrorCodes to the new ones, and gate them by the
flag in a single place, in QpackDecoder::OnErrorDetected().  Do the same thing
for QPACK decoder stream errors in QpackDecoderStreamReceiver and QpackEncoder.

Protected by FLAGS_quic_reloadable_flag_quic_granular_qpack_error_codes.

PiperOrigin-RevId: 338170616
Change-Id: I40fbf1c04869d74984e20f48c317daa995b6e99d