internal void RecalculateMTU()
{
lastMTUTest = (int)(lastMTUTest * MTU_TryDec);
mtu_status = MTUStatus.Setting;
}
void MTUHeartbeat(int now)
{
if (mtu_status == MTUStatus.Unset)
{
// Prep next MTU test
mtu_status = MTUStatus.Setting;
nextMTUTest = now + MTU_UnsetTry_Delay + 1.5f + Stats.Ping;
if (NetLogger.LogFlowControl)
{
NetLogger.LogVerbose("[FlowControl] Expanding MTU for {0}...", EndPoint);
}
}
else if (now >= nextMTUTest)
{
if (mtu_status == MTUStatus.Setting)
{
// Try and send an MTU packet
if (lastMTUTest < NetMessenger.MAX_UDP_PACKET_SIZE && TrySendMTU(lastMTUTest))
{
// If it succeeds then continue
lastMTUTest = (int)(lastMTUTest * MTU_TryInc);
now += MTU_UnsetTry_Delay;
}
else
{
// If it fails, set the MTU and stop trying to expand it
if (lastMTUTest > NetMessenger.MAX_UDP_PACKET_SIZE)
{
lastMTUTest = NetMessenger.MAX_UDP_PACKET_SIZE;
}
// Use 75% of the MTU as the max chunk size, and cap it at 5000 bytes.
maxChunkSize = (int)Math.Min(MaxUDP_MTU, lastMTUTest * 0.75f);
MTU = maxChunkSize;
Stats.MTU = MTU;
MTUEventNeedsCall = true;
if (NetLogger.LogFlowControl)
{
NetLogger.LogVerbose("[FlowControl] MTU for {0} set to {1}", EndPoint, MTU);
}
mtu_status = MTUStatus.Set;
now += MTU_SetTry_Delay;
}
}
// No need.
/*else if (status == MTUStatus.Set)
* {
* int tryExpandAmount = Math.Min((int)(lastMTUTest * MTU_TryInc), MaxUDP_MTU);
*
* if (TrySendMTU(tryExpandAmount))
* {
* lastMTUTest = (int)(lastMTUTest * MTU_TryInc);
* now += MTU_UnsetTry_Delay;
* MTU_Status = MTUStatus.Setting;
* NetLogger.LogVerbose("Expanding MTU further for {0}...", EndPoint);
* }
* else
* now += MTU_SetTry_Delay;
* }*/
}
}
