This also makes the uTP SendCallBack not returning a Future any
more as it is not used in sendData anyhow. And in case of uTP
over discv5, discv5 send call is already not async.
This gives quite a noticable throughput benchmark improvement over
with uTP over UDP, and a slightly noticable with uTP over discv5
- add eventLoop to control all incoming events
- change semantic of write to asynchronously block only when send buffer is full, and not when bytes do not fit into send window
- change handling of receive buffer, to start dropping packets if the reorder buffer and receive buffer are full. Old behaviour was to async block unless there is space which could lead to resource exhaustion attacks
Kim De Mey
KonradStaniec
Jacek Sieka
Ștefan Talpalaru