ICMP packets

From: Bob Rivers (bobrivers_at_pobox.com)
Date: 10/23/03 

Date: 23 Oct 2003 08:52:12 -0700

Hi,

I was doing a research looking for Java solutions that are able to do
"ping".

I found old messages (and not so old ones), telling that Java was not
able to do that, because the API provided do not support raw sockets.
The only solution that I found was a "simulation" of a ping program
doing a UDP request to a server on port 7.

So I decided to read the API (1.4.2) and I found that the package
"java.net" is able to send ICMP packets.

Actually, and this is my question, I only found an exception that:
"Signals that an ICMP Port Unreachable message has been received on a
connected datagram."
(http://java.sun.com/j2se/1.4.2/docs/api/java/net/PortUnreachableException.html).

Well, if the package has a exception for ICMP, I can supose that now I
am able to talk ICMP using Java
(http://java.sun.com/j2se/1.4.2/docs/api/java/net/DatagramSocket.html).

Am I right?

And finally: does someone did something related to this, using the new
api? Is it possible to post an example?

Thanks,

Bob Rivers
Sao Paulo - Brazil

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