Socket Programming

[EagleKeeper]

Application is using the MFC CSocket class

There is no problem setting up a socket to Listen (Server side) and a data socket (Client size).

When the Ethernet connection drops; both the Server side and Client side need to "reset" back into the intial state.

This "reset" can be done by Closing the socket.


Problem is how can I tell if the connection has been dropped.

I am getting no notification that the connection has been broken.

Guidance please.

 

[dighn]

We had this problem too and we decided to use a ping/pong mechanism to detect physically broken connection (which doesn't generate a disconnection event).

 

[AdamDuritz99]

Originally posted by: dighn
We had this problem too and we decided to use a ping/pong mechanism to detect physically broken connection (which doesn't generate a disconnection event).

Same here. In C# I inherited the TcpClient object creating a "ClientHandler". Inside this would just ping every second. If no response was given it would fire an event and assume there is as disconnection.

How often you should ping is really up to you, your application and your network, IMO.