private void SendAsyncCompleted(object sender, SocketAsyncEventArgs e)
{
var sent = sendArgs.BytesTransferred;
CoreEventSource.SendChunk(name, IsAlive, sent, sendArgs.SocketError);
// failed during send
if (sendArgs.SocketError != SocketError.Success || sent < 1)
{
FinishSending(false);
return;
}
var sendOffset = sendArgs.Offset + sent;
var sendCount = sendArgs.Count - sent;
// OS sent less data than we asked for, so send the remaining data
if (sendCount > 0)
{
PerformSend(sendOffset, sendCount);
}
else
{
Debug.Assert(sendCount == 0);
// all data was sent
sendBuffer.Clear();
FinishSending(true);
}
}
private void PerformSend(int sendOffset, int sendCount)
{
for (;;)
{
// try sending all our data
sendArgs.SetBuffer(sendOffset, sendCount);
// send is being done asynchrously (SendAsyncCompleted will clean up)
if (socket.SendAsync(sendArgs))
{
break;
}
// send was done synchronously
var sent = sendArgs.BytesTransferred;
if (trace.IsEnabled())
{
trace.SendChunk(name, IsAlive, sent, sendArgs.SocketError);
}
// check for fail
if (sendArgs.SocketError != SocketError.Success || sent < 1)
{
// socket error
FinishSending(false);
break;
}
sendOffset += sent;
sendCount -= sent;
Debug.Assert(sendCount >= 0);
// no data is remaining: quit
// otherwise try sending a new chunk
if (sendCount == 0)
{
sendBuffer.Reset();
FinishSending(true);
break;
}
}
}