in reply to Re^5: udp recv question
in thread udp recv question

I did that reading, and I thought I provided a complete sample program that does exactly the technique you describe.

From a sniffer, I know a UDP packet goes out and an ICMP one comes back.

I can't figure out to read the ICMP into memory (not decode, just read into a buffer...)

No worries, no more comments needed, I'll review my code in the morning...maybe a good night sleep will clear out the cobbwebs...

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Re^7: udp recv question
by Anonymous Monk on Jun 28, 2004 at 06:12 UTC

    you'll have to use Net::Pcap most likely. use it to capture the appropriate ICMP packets that may be returned in response to your UDP packet. dealing with ICMP requires root access and is a pain.

    i would just make a call out to nmap or some other external port scanner.

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