How to Obtain network port status?

[darkman0101]

I am trying to obtain the status (eg listening or established) for a tcp port. When a certain service starts it listens on port x. I want to monitor this port to know when a remote machine connects to it.

I can pipe 'netstat -a -n' to a disk file and read each line for this local port and read the status, but this will need to be done on a timer event (thereby using some cpu time) and will result on a disk read/write each time.
I want to avoid this if possible.

Is there something in the APIs that will do a netstat like function and allow me to watch this port. Or do I somehow need to attach a socket to this port and watch for data (I may be talking "out of my league" on this last idea as I know very little on networking)

Any help would be appreciated

Jas

 

[fenris]

Try this link, I think it is what you want....

http://www.vbip.com/iphelper/get_tcp_table.asp

Regards,

Troy Williams B.Eng.
fenris@hotmail.com