Net Detection

How to detect my current network status on TCP/IP (online or offline) using perl?

Thank you in advance.

This depends on how you connect and what OS you are using. I can't comment on windows.

On *nix, I use crontab to run a script every 5 minutes on my linux box.

The script uses backticks to run "ifconfig," which will tell you mucho information about what network connections you have running. I then parse this script to figure out my IP address.

This is for my ADSL account, which ocassionally "loses it's lease" and the IP changes. When the change occurs, I have it email me so I can still SSH to my box and get my IP matched to my DNS service again, and keep my web server running smoothly.

Works pretty well. . . You could probably write something to work similarly for windows too. . .

I'm writing my own SMTP-server on Perl and want this one:

If there's no TCP/IP connection, my server won't try to send any of messages. But how to detect it?
I want to detect it without connecting to any server.

Why? Why write your own SMTP server, when this wheel has been invented a million different times? Do you really think what you'll write could be better and more standards-compliant than sendmail?

Are you saying you want to make a program that interfaces with an SMTP server? That would make more sense.

What's wrong with a periodic ping to a web page, like yahoo? If you ping fails, you'll know you don't have TCP/IP connectivity.

You should really look into "ifconfig" if you want to read your network interfaces directly. I'm sure someone has written something on CPAN too.

Ok. Listen.

I do it 'cause need it. It won't be sendmail-like program. It will be a real localhost SMTP-server for Windows. I don't want to ping some server. Because the server may be switched off or no ping or something else. I want to enable the mechanism used in ICQ Net Detect.
You talk about ifconfig, but I use Windows.

If you can't give a full answer on my question, close your mouth, please.

I'm sorry. You didn't indicate you were using windows until your last post.

Good Luck!