Hiya,
ICMPd sends the data packets in either TCP or UDP over that port
number, check IANA: http://www.iana.org/assignments/port-numbers
Here is the packet structure: http://www.techbooksforfree.com/
intro_to_data_com/page253.html
Hope that helps!
Cheers,
Luis.
On 10 Oct 2006, at 0:10, Trevor DeVore wrote:
On Oct 9, 2006, at 3:37 PM, Luis wrote:
ICMPd is the daemon ('shell app') that runs the request over that
port. It would be a case of recreating the ICMPd functionality in
Rev, all it's doing is sending specifically formed packets over
that port that servers/routers/etc running their own ICMPd will
respond to.
It's a small app. If anyone else is interested then I might have a
look at the code (should be able to get a hold of the C/C++ source
code) and attempt to translate it to Transcript. Not too sure how
tight I can get the timings, but it should be accurate enough.
Luis,
I'm no expert in this area and I would love to learn that you can
write your own ping utility in Rev. I researched this a few days
ago in an attempt to do so. Creating the actual ICMP echo request
message isn't a big deal in Rev. I *think* the problem you would
have is when that message gets wrapped up in the IP Datagram
structure which I believe Rev does when you write to a socket. The
docs say that Rev's open socket command only uses "TCP" and "UDP"
so there doesn't seem to be a way to send data over a socket that
identifies itself as the ICMP protocol. I would think that ping
daemons would only watch for traffic that was send using the ICMP
protocol but I don't know.
--
Trevor DeVore
Blue Mango Learning Systems - www.bluemangolearning.com
[EMAIL PROTECTED]
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