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Exceleratenl
 Registered User |
- Multiple Network Adapters - How to find where the message is from
Hello,
I have a situation with my PC, where I have three network cards
installed.
I have a piece of hardware sending UDP messages every now and then.
I want to capture these messages. But I need to know which network
adapter they came in on. (for reasons, I can only talk to the
hardware using a certain network address on the physical card, so will
need to reconfigure the card programatically (which I can already
do). If only I knew what card the UDP message was coming in on).
What would be the simplist way of doing this? (other than the brute
force method of disabling the other two cards and listening for a
time, then repeating for other cards until I get a message back).
(Obviously, I can physically look at the back of my PC to see which
one, but I need to do this programatically out in the field. We don't
want the user to have to worry about the network settings, we want it
to be totally automatic).
I've looked at the UDPClient stuff, but it doesn't cut it, so assuming
I need to go back to sockets. (my knowledge of which is a bit
sketchy).
Any ideas?
Rollasoc
- Garbage Collection & Creating Class Instances
Hi!
I had a problem for several days and now found out what it is caused by:
When calling Sub New of a class under XP, on a specific line (getting IP
address) the procedure was left immediately without raising an error.
Break Points in code lines after the "x = new y" were ignored. Stepping
through the code opens a message box on that line:
"There is not source code available for the current location."
The cause:
The program is a terminal emulation running in two versions for XP and
CE but sharing most of the code. When the connection is closed the
program restarts internally. Under CE the memory runs full because the
garbage collection doesn't clean up. So I added:
GC.Collect()
GC.GetTotalMemory(True)
GC.WaitForPendingFinalizers()
This runs perfectly under CE. But under XP it seems to dispose objects
that are created afterwards, _while_ they are created!
I solved the problem by detecting if it is a CE device and calling GC.*
only there.
Does anyone know more about this behaviour?
Kind regards,
Benjamin Lukner
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