forked from quic-go/quic-go
80 lines
2.3 KiB
Go
80 lines
2.3 KiB
Go
package wire
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import (
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"fmt"
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"git.geeks-team.ru/gr1ffon/quic-go/internal/protocol"
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"git.geeks-team.ru/gr1ffon/quic-go/internal/qerr"
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"git.geeks-team.ru/gr1ffon/quic-go/quicvarint"
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)
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// A ResetStreamFrame is a RESET_STREAM or RESET_STREAM_AT frame in QUIC
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type ResetStreamFrame struct {
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StreamID protocol.StreamID
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ErrorCode qerr.StreamErrorCode
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FinalSize protocol.ByteCount
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ReliableSize protocol.ByteCount
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}
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func parseResetStreamFrame(b []byte, isResetStreamAt bool, _ protocol.Version) (*ResetStreamFrame, int, error) {
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startLen := len(b)
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streamID, l, err := quicvarint.Parse(b)
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if err != nil {
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return nil, 0, replaceUnexpectedEOF(err)
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}
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b = b[l:]
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errorCode, l, err := quicvarint.Parse(b)
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if err != nil {
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return nil, 0, replaceUnexpectedEOF(err)
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}
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b = b[l:]
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finalSize, l, err := quicvarint.Parse(b)
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if err != nil {
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return nil, 0, replaceUnexpectedEOF(err)
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}
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b = b[l:]
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var reliableSize uint64
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if isResetStreamAt {
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reliableSize, l, err = quicvarint.Parse(b)
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if err != nil {
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return nil, 0, replaceUnexpectedEOF(err)
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}
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b = b[l:]
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}
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if reliableSize > finalSize {
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return nil, 0, fmt.Errorf("RESET_STREAM_AT: reliable size can't be larger than final size (%d vs %d)", reliableSize, finalSize)
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}
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return &ResetStreamFrame{
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StreamID: protocol.StreamID(streamID),
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ErrorCode: qerr.StreamErrorCode(errorCode),
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FinalSize: protocol.ByteCount(finalSize),
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ReliableSize: protocol.ByteCount(reliableSize),
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}, startLen - len(b), nil
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}
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func (f *ResetStreamFrame) Append(b []byte, _ protocol.Version) ([]byte, error) {
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if f.ReliableSize == 0 {
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b = quicvarint.Append(b, uint64(FrameTypeResetStream))
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} else {
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b = quicvarint.Append(b, uint64(FrameTypeResetStreamAt))
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}
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b = quicvarint.Append(b, uint64(f.StreamID))
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b = quicvarint.Append(b, uint64(f.ErrorCode))
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b = quicvarint.Append(b, uint64(f.FinalSize))
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if f.ReliableSize > 0 {
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b = quicvarint.Append(b, uint64(f.ReliableSize))
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}
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return b, nil
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}
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// Length of a written frame
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func (f *ResetStreamFrame) Length(protocol.Version) protocol.ByteCount {
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size := 1 // the frame type for both RESET_STREAM and RESET_STREAM_AT fits into 1 byte
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if f.ReliableSize > 0 {
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size += quicvarint.Len(uint64(f.ReliableSize))
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}
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return protocol.ByteCount(size + quicvarint.Len(uint64(f.StreamID)) + quicvarint.Len(uint64(f.ErrorCode)) + quicvarint.Len(uint64(f.FinalSize)))
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}
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