How do I get ports information?

[DiegoErnesto]

Hi;

Please, I need help. I have a client program and other server and use port 2000 for to connect, when restart the computer work well but when initialize other application in the server and down the server program and again run this program don't work. I want to know if this port is busy.

My server computer is for BI and wake up many services.

Try obtain this information with getservbyport(<port number>, <protocol>) but don't get information that I wait.

any idea is welcome.

Thanks and regards.