PureBasic Forums - English

Hi,
Im starting a program for my work that collects data from some computers via network. I want to use the built-in network functions. Is there a limit for connections at one time?

I don't think there is a hard limit for active network connections. At least not in PureBasic, the operating system may have a limit, i am not sure. If the active conncections does not go into the thousends, i would not worry.

Each IP address can handle 65,535 ports.
By convention the first 1024 ports are reserved (but they can still be used).
The operating system takes care of assigning a free port for each client at connection.
Remember to close each connection after use to free the port.
It is possible that PB also has a limitation.
(For more information, see: sockets)

Purebasic has no limit by itself. But it's quite unhandy to work with a lot of connections because you can not start each connection in its own thread.

Marc56us wrote:Each IP address can handle 65,535 ports.
By convention the first 1024 ports are reserved (but they can still be used).
The operating system takes care of assigning a free port for each client at connection.
Remember to close each connection after use to free the port.
It is possible that PB also has a limitation.
(For more information, see: sockets)

The 65535 limit is only for clients. A server can theoretically handle 65535 connection for each client.

The maximum limit for a process listening on a certain port on your linux machine is the maximum limit of file descriptors the process is allowed to use.

Ok thanks for the answers. It's about 30 to 40 machines right now, but itay be some more in the future. So I guess there shouldn't be a problem.