/
goaway.go
61 lines (52 loc) · 1.34 KB
/
goaway.go
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package frame
import "io"
const goAwayFrameLength = 8
type GoAway struct {
common
debugToWrite []byte
debugToRead io.LimitedReader
}
func (f *GoAway) LastStreamId() StreamId {
return StreamId(order.Uint32(f.body()))
}
func (f *GoAway) ErrorCode() ErrorCode {
return ErrorCode(order.Uint32(f.body()[4:]))
}
func (f *GoAway) Debug() io.Reader {
return &f.debugToRead
}
func (f *GoAway) readFrom(rd io.Reader) error {
if f.length < goAwayFrameLength {
return frameSizeError(f.length, "GOAWAY")
}
if _, err := io.ReadFull(rd, f.body()[:goAwayFrameLength]); err != nil {
return err
}
if f.StreamId() != 0 {
return protoError("GOAWAY stream id must be zero, not: %d", f.StreamId())
}
f.debugToRead.R = rd
f.debugToRead.N = int64(f.Length())
return nil
}
func (f *GoAway) writeTo(wr io.Writer) (err error) {
if err = f.common.writeTo(wr, goAwayFrameLength); err != nil {
return
}
if _, err = wr.Write(f.debugToWrite); err != nil {
return err
}
return
}
func (f *GoAway) Pack(lastStreamId StreamId, errCode ErrorCode, debug []byte) (err error) {
if err = lastStreamId.valid(); err != nil {
return
}
if err = f.common.pack(TypeGoAway, goAwayFrameLength+len(debug), 0, 0); err != nil {
return
}
order.PutUint32(f.body(), uint32(lastStreamId))
order.PutUint32(f.body()[4:], uint32(errCode))
f.debugToWrite = debug
return nil
}