func (t *senderRoundtripReporter) OnWrite(rtt int64, timeWrite int64) *dccp.Option {
if rtt <= 0 || timeWrite-t.lastReportTime < rtt {
return nil
}
t.lastReportTime = timeWrite
return encodeOption(&RoundtripReportOption{Roundtrip: dccp.TenMicroFromNano(rtt)})
}
func (r *receiver) makeElapsedTimeOption(ackNo int64, timeWrite int64) *dccp.ElapsedTimeOption {
// The first Ack may be sent before receiver has had a chance to see a gsr, in which
// case we return nil
if r.gsr == 0 {
return nil
}
if ackNo != r.gsr {
panic("ccid3 receiver: GSR != AckNo")
}
elapsedNS := max64(0, timeWrite-r.gsrTimestamp)
return &dccp.ElapsedTimeOption{dccp.TenMicroFromNano(elapsedNS)}
}