53 lines
1.4 KiB
Go
53 lines
1.4 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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// A StreamBlockedFrame in QUIC
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type StreamBlockedFrame struct {
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StreamID protocol.StreamID
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Offset protocol.ByteCount
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}
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// ParseStreamBlockedFrame parses a STREAM_BLOCKED frame
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func ParseStreamBlockedFrame(r *bytes.Reader, _ protocol.VersionNumber) (*StreamBlockedFrame, 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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sid, err := utils.ReadVarInt(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.ReadVarInt(r)
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if err != nil {
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return nil, err
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}
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return &StreamBlockedFrame{
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StreamID: protocol.StreamID(sid),
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Offset: protocol.ByteCount(offset),
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}, nil
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}
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// Write writes a STREAM_BLOCKED frame
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func (f *StreamBlockedFrame) Write(b *bytes.Buffer, version protocol.VersionNumber) error {
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if !version.UsesIETFFrameFormat() {
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return (&blockedFrameLegacy{StreamID: f.StreamID}).Write(b, version)
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}
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b.WriteByte(0x09)
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utils.WriteVarInt(b, uint64(f.StreamID))
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utils.WriteVarInt(b, uint64(f.Offset))
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return nil
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}
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// MinLength of a written frame
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func (f *StreamBlockedFrame) MinLength(version protocol.VersionNumber) protocol.ByteCount {
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if !version.UsesIETFFrameFormat() {
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return 1 + 4
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}
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return 1 + utils.VarIntLen(uint64(f.StreamID)) + utils.VarIntLen(uint64(f.Offset))
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}
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