tcp functions issue quick fix c++

i have wrote a tcp functions to handle clients work and send it to the server
sometimes the client not able to send the heartbeat msg to the server even though i didn't close the socket
and in the server side it see the client connected already
but in heart beat of the client after it fail to send the heartbeat msg to the server
it tries to re init a new connection with the server
that causes the client to get duplicated in the connected list of the server
simple issue to find the problem in one class
task must be done via teamviewer please read that carefully
thanks