private void SetBufSize(int rcvSize, int sndSize)
{
Debug.Assert(_fd != null);
for (int i = 0; i < 2; ++i)
{
bool isSnd;
string direction;
string prop;
int dfltSize;
int sizeRequested;
if (i == 0)
{
isSnd = false;
direction = "receive";
prop = "Ice.UDP.RcvSize";
dfltSize = Network.GetRecvBufferSize(_fd);
sizeRequested = rcvSize;
_rcvSize = dfltSize;
}
else
{
isSnd = true;
direction = "send";
prop = "Ice.UDP.SndSize";
dfltSize = Network.GetSendBufferSize(_fd);
sizeRequested = sndSize;
_sndSize = dfltSize;
}
//
// Get property for buffer size if size not passed in.
//
if (sizeRequested == -1)
{
sizeRequested = _instance.Communicator.GetPropertyAsInt(prop) ?? dfltSize;
}
//
// Check for sanity.
//
if (sizeRequested < (UdpOverhead + IceInternal.Protocol.headerSize))
{
_instance.Logger.Warning($"Invalid {prop} value of {sizeRequested} adjusted to {dfltSize}");
sizeRequested = dfltSize;
}
if (sizeRequested != dfltSize)
{
//
// Try to set the buffer size. The kernel will silently adjust
// the size to an acceptable value. Then read the size back to
// get the size that was actually set.
//
int sizeSet;
if (i == 0)
{
Network.SetRecvBufferSize(_fd, sizeRequested);
_rcvSize = Network.GetRecvBufferSize(_fd);
sizeSet = _rcvSize;
}
else
{
Network.SetSendBufferSize(_fd, sizeRequested);
_sndSize = Network.GetSendBufferSize(_fd);
sizeSet = _sndSize;
}
//
// Warn if the size that was set is less than the requested size
// and we have not already warned
//
if (sizeSet < sizeRequested)
{
Ice.BufSizeWarnInfo winfo = _instance.GetBufSizeWarn(Ice.UDPEndpointType.Value);
if ((isSnd && (!winfo.SndWarn || winfo.SndSize != sizeRequested)) ||
(!isSnd && (!winfo.RcvWarn || winfo.RcvSize != sizeRequested)))
{
_instance.Logger.Warning(
$"UDP {direction} buffer size: requested size of {sizeRequested} adjusted to {sizeSet}");
if (isSnd)
{
_instance.SetSndBufSizeWarn(Ice.UDPEndpointType.Value, sizeRequested);
}
else
{
_instance.SetRcvBufSizeWarn(Ice.UDPEndpointType.Value, sizeRequested);
}
}
}
}
}
}
