How to check a TCP port with Cocoa OSX SDK [closed]

问题

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Closed 7 years ago.

I would like to make a cocoa app that will check if some TCP ports are opened on a server. Return a little red ball if it's closed, or green if it's open...

But I'm little bit confused, what class to use, etc.

Thanks in advance for your help

回答1:

If it is enough just to connect to the the port and close it, the simplest thing is to use the BSD calls:

• create a socket using socket()
• connect to the remote port using connect()
• close the socket using close()

来源：https://stackoverflow.com/questions/7997126/how-to-check-a-tcp-port-with-cocoa-osx-sdk