perl5. It allows you to trace the path IP packets take to a destination.
It is implemented by using raw sockets to act just like the regular
traceroute.
You must also be root to use the raw sockets.
WWW: http://search.cpan.org/dist/Net-Traceroute-PurePerl
PR: ports/145277
Submitted by: Ju Pengfei <jupengfei@gmail.com>