[libnice] how does libnice keep a connection alive

[tom chen]

Hello,
 

I am very new to ICE, I am confused how libnice keep alive the selected IP and port number? I am wondering if libnice creates a socket using the local candidate's port number, binds with the candidates's IP address, then use the socket to periodically send some commands to keep the connection alive. If so, since the candidates' IP address and port number have been used by libnice refreshing thread, how can we create a socket to use that candidate's IP & port to transport media stream? 

 

Tom



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