I need to look around my desk at home to try to determine
where I got the extra "new" from.  I have been using Lincoln
Stein's Perl networking book (examples probably correct), 
the Perl Cookbook and many Google examples.  My guess is that
I got it from a Google example.

Inside the if blocks I changed the "new" lines to look like:
$MySocket = IO::Socket::INET->new(Proto => 'udp',

After correcting the "new" issue I APPEAR to fail to 
operate in what seems to be the exact same way.  From the 
command line the send statements whip by quickly.  The recv
statements pause for the length of alarm time and repeat 
for several retries.  This is exactly what I currently 
expect to see on the command line.  But, I am not seeing 
any activity on the hub (quad card only) LEDs.

Looking at this in a little more detail I used Ethereal 
(now WireShark) on the machine that has the quad port cards.

ARGUMENT A
Packets from 192.168.22.30 to 192.168.21.28
No packets were seen on eth10 (the sending end)

ARGUMENT B
Packets from 192.168.21.28 to 192.168.22.30
No packets were seen on eth8 (then sending end)

ARGUMENT C
Packets from 192.168.21.28 to 192.168.20.223 (NOT quad card)
No packets were seen on eth8 (I hoped this was the sending end)
4 UDP packets were captured on eth0 (part of the .20 net)

THUS:

1) I think I can send from box to box with the "my" and 
"new" fixes.  Thank you for the good suggestions.  With this
I should be able to work on my required final goal.

2) I do not seem to be able to get out of the box when I 
try to go from one port to another port on quad cards in the 
same box.  I was told to expect this.  Is there a way around 
this?  Can I use a different net for each port of the quad
cards to prevent "route" from taking the unnecessary 
segments out of the transmission?  This would be helpful for 
single machine code development and other test projects 
down the road.

3) My "argument C" example shows "route" changing my ports
for me.  The packet went out the port that makes good sense, 
not the port I coded.  At times it would be handy if I could
overpower this "feature" of good routing.

Thank you for the help.  I can proceed now.  If there are 
any suggestions on how I can force my routes (items 2 & 3) 
I would appreciate additional information.

Thanks,
Bruce

In reply to Re^2: socket communication problems by Bruce32903
in thread socket communication problems by Bruce32903

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.