forked from quic-go/quic-go
46 lines
1.3 KiB
Go
46 lines
1.3 KiB
Go
package wire
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import (
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"bytes"
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"github.com/lucas-clemente/quic-go/internal/protocol"
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"github.com/lucas-clemente/quic-go/internal/utils"
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)
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type windowUpdateFrame struct {
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StreamID protocol.StreamID
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ByteOffset protocol.ByteCount
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}
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// ParseWindowUpdateFrame parses a WINDOW_UPDATE frame
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// The frame returned is
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// * a MAX_STREAM_DATA frame, if the WINDOW_UPDATE applies to a stream
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// * a MAX_DATA frame, if the WINDOW_UPDATE applies to the connection
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func ParseWindowUpdateFrame(r *bytes.Reader, version protocol.VersionNumber) (Frame, error) {
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if _, err := r.ReadByte(); err != nil { // read the TypeByte
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return nil, err
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}
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streamID, err := utils.GetByteOrder(version).ReadUint32(r)
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if err != nil {
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return nil, err
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}
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offset, err := utils.GetByteOrder(version).ReadUint64(r)
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if err != nil {
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return nil, err
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}
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if streamID == 0 {
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return &MaxDataFrame{ByteOffset: protocol.ByteCount(offset)}, nil
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}
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return &MaxStreamDataFrame{
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StreamID: protocol.StreamID(streamID),
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ByteOffset: protocol.ByteCount(offset),
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}, nil
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}
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func (f *windowUpdateFrame) Write(b *bytes.Buffer, version protocol.VersionNumber) error {
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b.WriteByte(0x4)
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utils.GetByteOrder(version).WriteUint32(b, uint32(f.StreamID))
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utils.GetByteOrder(version).WriteUint64(b, uint64(f.ByteOffset))
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return nil
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}
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