I'm trying to write a trace route program in PHP. The algorithm in itself
is not a problem, but i need to know how to set time to live (by number of
hops) in an IP datagram and send it. I also need to be able to listen for
and recieve ICMP messages and to exctract the IP adress of the sending
router from this message.

I'm rather new to PHP, and I'm suspecting that I will have to use a
language that can manipulate the internet protocol stack at a lower level.
But if it is possible with PHP, nothing would be better. Any suggestions?

Ero Karlsen

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