56 lines
1.3 KiB
Go
56 lines
1.3 KiB
Go
package wire
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import (
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"bytes"
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"fmt"
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"github.com/lucas-clemente/quic-go/internal/protocol"
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"github.com/lucas-clemente/quic-go/quicvarint"
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)
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// A MaxStreamsFrame is a MAX_STREAMS frame
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type MaxStreamsFrame struct {
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Type protocol.StreamType
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MaxStreamNum protocol.StreamNum
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}
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func parseMaxStreamsFrame(r *bytes.Reader, _ protocol.VersionNumber) (*MaxStreamsFrame, error) {
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typeByte, err := r.ReadByte()
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if err != nil {
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return nil, err
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}
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f := &MaxStreamsFrame{}
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switch typeByte {
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case 0x12:
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f.Type = protocol.StreamTypeBidi
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case 0x13:
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f.Type = protocol.StreamTypeUni
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}
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streamID, err := quicvarint.Read(r)
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if err != nil {
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return nil, err
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}
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f.MaxStreamNum = protocol.StreamNum(streamID)
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if f.MaxStreamNum > protocol.MaxStreamCount {
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return nil, fmt.Errorf("%d exceeds the maximum stream count", f.MaxStreamNum)
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}
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return f, nil
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}
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func (f *MaxStreamsFrame) Write(b *bytes.Buffer, _ protocol.VersionNumber) error {
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switch f.Type {
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case protocol.StreamTypeBidi:
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b.WriteByte(0x12)
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case protocol.StreamTypeUni:
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b.WriteByte(0x13)
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}
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quicvarint.Write(b, uint64(f.MaxStreamNum))
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return nil
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}
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// Length of a written frame
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func (f *MaxStreamsFrame) Length(protocol.VersionNumber) protocol.ByteCount {
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return 1 + quicvarint.Len(uint64(f.MaxStreamNum))
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}
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