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Client / Server programming - generic steps to start a server or a client
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Client/server network programming requires a server running on one machine to listen and answer requests and one or more clients running either on the same machine or different machines connected to the server through a network.
Independent from your operating system and programming language, you'll have to follow the following basic steps to create and run a server (the function refers to the unix naming convention; almost all languages have interfaces to them):
- Create a socket with socket
- Bind the socket to a port address with bind
- Listen to the socket at the port address with listen
- Accept client connections with accept
Creating a client involves less steps:
- Create a socket with socket
- Connect the socket to the remote machine with connect
Most modern environments offer classes, components, beans, Active-X controls.. libraries.. to abstract this process but it's good to know the basic steps that happen behind the scenes in case you get an error message 'Cannot bind socket'.. 'port already in use'.
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