If you need to use Perl, you'll probably get farthest by using the module hooks into libpcap, which implements raw socket functionality on *NIX and Windows. (A previous discussion of raw sockets in Perl is here).
Glancing at CPAN, there's NetPacket::ARP, but apparently encoding isn't implemented. Still, it shouldn't be too hard to finish that yourself since the meat of the decoder is in a fairly self-documenting call to unpack, which I imagine could be inverted fairly easily. Once you have the encoded packet, one or more of NetPacket::Ethernet, Net::PcapUtils, and Net::RawIP should help you get it on the wire. | [reply] |
Read RFC 826, then search Google for how to create a raw Ethernet packet. I don't know of any modules to help with this.
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I wanted to explore how Perl's closures can be manipulated, and ended up creating an object system by accident.
-- Schemer
Note: All code is untested, unless otherwise stated
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