On Sat, 27 Apr 2002, Ero Stig Karlsen wrote:
> 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?

I don't think this is possible with PHP. Traceroute handcrafts packets 
with specific TTL values. The PHP socket library doesn't give you this 
level of control.


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