// -> sendatleastone = true
// - or we got an ack, so we should maybe send a bit more data
// -> sendatleastone = false
if(is_reliable(c) || hdr.ctl & SYN || hdr.ctl & FIN) {
// -> sendatleastone = true
// - or we got an ack, so we should maybe send a bit more data
// -> sendatleastone = false
if(is_reliable(c) || hdr.ctl & SYN || hdr.ctl & FIN) {