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stream_blocked_frame.go
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stream_blocked_frame.go
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package wire
import (
"bytes"
"github.com/paaguti/quic-go/internal/protocol"
"github.com/paaguti/quic-go/internal/utils"
)
// A StreamBlockedFrame in QUIC
type StreamBlockedFrame struct {
StreamID protocol.StreamID
Offset protocol.ByteCount
}
// parseStreamBlockedFrame parses a STREAM_BLOCKED frame
func parseStreamBlockedFrame(r *bytes.Reader, _ protocol.VersionNumber) (*StreamBlockedFrame, error) {
if _, err := r.ReadByte(); err != nil { // read the TypeByte
return nil, err
}
sid, err := utils.ReadVarInt(r)
if err != nil {
return nil, err
}
offset, err := utils.ReadVarInt(r)
if err != nil {
return nil, err
}
return &StreamBlockedFrame{
StreamID: protocol.StreamID(sid),
Offset: protocol.ByteCount(offset),
}, nil
}
// Write writes a STREAM_BLOCKED frame
func (f *StreamBlockedFrame) Write(b *bytes.Buffer, version protocol.VersionNumber) error {
if !version.UsesIETFFrameFormat() {
return (&blockedFrameLegacy{StreamID: f.StreamID}).Write(b, version)
}
b.WriteByte(0x09)
utils.WriteVarInt(b, uint64(f.StreamID))
utils.WriteVarInt(b, uint64(f.Offset))
return nil
}
// Length of a written frame
func (f *StreamBlockedFrame) Length(version protocol.VersionNumber) protocol.ByteCount {
if !version.UsesIETFFrameFormat() {
return 1 + 4
}
return 1 + utils.VarIntLen(uint64(f.StreamID)) + utils.VarIntLen(uint64(f.Offset))
}