2 Active connections on 1 TCP server IP/port

This is not the most common design, but have a look at the following output:

remote          local        state

What needs to be unique, is the 5-tuple (protocol, remote-ip, remote-port, local-ip, local-port)… so this situation can exist. [[tcp/ip sockets in C]] P100 has a full section on this topic.

http://stackoverflow.com/questions/11129212/tcp-two-different-sockets-sharing-a-port also says “Multiple worker-sockets on the same TCP server can share the same server-side IP/Port pair as long as they are associated with different client-side IP/Port pairs”. This “accept, move the connection to a dedicated server socket, then go back to accept()” is the common design — On each incoming connection, the listening TCP server will start a new thread/task/process  using a new “worker” socket on the server side. Note the new worker socket shares server ip:port with the original listening socket

https://github.com/tiger40490/repo1/blob/py1/py/sock/1sock2server.py is my experiment. It pushes the concept of “sharing” further  — two TCP serves sharing a single socket not just a single ip:port endpoint!


One thought on “2 Active connections on 1 TCP server IP/port

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s