public override void onACK(int ack)
{
long B = 0;
double inc = 0;
// Note: 1/24/2012
// The minimum increase parameter is increased from "1.0 / m_iMSS" to 0.01
// because the original was too small and caused sending rate to stay at low level
// for long time.
const double min_inc = 0.01;
ulong currtime = Timer.getTime();
if (currtime - m_LastRCTime < (ulong)m_iRCInterval)
{
return;
}
m_LastRCTime = currtime;
if (m_bSlowStart)
{
m_dCWndSize += SequenceNumber.seqlen(m_iLastAck, ack);
m_iLastAck = ack;
if (m_dCWndSize > m_dMaxCWndSize)
{
m_bSlowStart = false;
if (m_iRcvRate > 0)
{
m_dPktSndPeriod = 1000000.0 / m_iRcvRate;
}
else
{
m_dPktSndPeriod = (m_iRTT + m_iRCInterval) / m_dCWndSize;
}
}
}
else
{
m_dCWndSize = m_iRcvRate / 1000000.0 * (m_iRTT + m_iRCInterval) + 16;
}
// During Slow Start, no rate increase
if (m_bSlowStart)
{
return;
}
if (m_bLoss)
{
m_bLoss = false;
return;
}
B = (long)(m_iBandwidth - 1000000.0 / m_dPktSndPeriod);
if ((m_dPktSndPeriod > m_dLastDecPeriod) && ((m_iBandwidth / 9) < B))
{
B = m_iBandwidth / 9;
}
if (B <= 0)
{
inc = min_inc;
}
else
{
// inc = max(10 ^ ceil(log10( B * MSS * 8 ) * Beta / MSS, 1/MSS)
// Beta = 1.5 * 10^(-6)
inc = Math.Pow(10.0, Math.Ceiling(Math.Log10(B * m_iMSS * 8.0))) * 0.0000015 / m_iMSS;
if (inc < min_inc)
{
inc = min_inc;
}
}
m_dPktSndPeriod = (m_dPktSndPeriod * m_iRCInterval) / (m_dPktSndPeriod * inc + m_iRCInterval);
}
