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package wire
import (
"github.com/quic-go/quic-go/internal/protocol"
"github.com/quic-go/quic-go/internal/qerr"
"github.com/quic-go/quic-go/quicvarint"
)
// A ResetStreamFrame is a RESET_STREAM frame in QUIC
type ResetStreamFrame struct {
StreamID protocol.StreamID
ErrorCode qerr.StreamErrorCode
FinalSize protocol.ByteCount
}
func parseResetStreamFrame(b []byte, _ protocol.Version) (*ResetStreamFrame, int, error) {
startLen := len(b)
var streamID protocol.StreamID
var byteOffset protocol.ByteCount
sid, l, err := quicvarint.Parse(b)
if err != nil {
return nil, 0, replaceUnexpectedEOF(err)
}
b = b[l:]
streamID = protocol.StreamID(sid)
errorCode, l, err := quicvarint.Parse(b)
if err != nil {
return nil, 0, replaceUnexpectedEOF(err)
}
b = b[l:]
bo, l, err := quicvarint.Parse(b)
if err != nil {
return nil, 0, replaceUnexpectedEOF(err)
}
byteOffset = protocol.ByteCount(bo)
return &ResetStreamFrame{
StreamID: streamID,
ErrorCode: qerr.StreamErrorCode(errorCode),
FinalSize: byteOffset,
}, startLen - len(b) + l, nil
}
func (f *ResetStreamFrame) Append(b []byte, _ protocol.Version) ([]byte, error) {
b = append(b, resetStreamFrameType)
b = quicvarint.Append(b, uint64(f.StreamID))
b = quicvarint.Append(b, uint64(f.ErrorCode))
b = quicvarint.Append(b, uint64(f.FinalSize))
return b, nil
}
// Length of a written frame
func (f *ResetStreamFrame) Length(protocol.Version) protocol.ByteCount {
return 1 + protocol.ByteCount(quicvarint.Len(uint64(f.StreamID))+quicvarint.Len(uint64(f.ErrorCode))+quicvarint.Len(uint64(f.FinalSize)))
}
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