Resume the same TCP connection

I have a multi-process TCPServer which creates (by fork() on linux) one process (child) per client's request, and in the meanwhile it is listening other connection's request. So I have a 1 to 1 mapping between clien开发者_如何学Pythont and server. Suppose that one client crashes...is it possible to reconnect it to the same child server process?In other terms..is it possible to restore a pre-exhistent connection which is failed or the attempts to reconnect create a new connection (and then a new child server process)? thank you...

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Without some knowledge (by the forker) of the interior session-related details (of the forkee), you have to make assumptions about external details being adequate to determine which remote connections get re-associated with which local connection end-points.

You could change the way things work in your application, though. Oracle SQL*Net does this on some platforms (due to platform limitations).

The initial connection to the TCPServer causes a fork and then opens up a new listening socket, sends back a redirection instruction to connect to the new listening socket & identifying details (to avoid someone else connecting and impersonating the original connector). The client then connects to the new socket, and uses this socket to do any re-connections upon disconnects before their time.

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I have done something very similar to this in .NET platform. If you have something which is unique for every connection (for example IMEI of the connecting device this can be done).You should have some global two-dimensional array variable with combination of ProcessID and IMEI. So when device is disconnected and then the device reconnects you only search in this array for this IMEI and you have the process for this device. You should be very carefull with this global variable.

Edited: I gave an example of some unique identifier. In my case that was the IMEI of the devices. In your case that could be something else which you know it is unique. I had to do this because I had very big problem with devices breaking up the connection. Every new device was new connection so afterward I ended up with very big CPU usage.

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Maybe you can refer https://eternalterminal.dev/howitworks/. Both the client and the server need change.