-----BEGIN PGP SIGNED MESSAGE-----
>>>>> "Steve" == Steve Schmidtke <[EMAIL PROTECTED]> writes:
Gerd> Hmm, I don't think it is a good idea to put that kind of
Gerd> testing code into the switch daemon. I'd make the switch
Gerd> daemon behave as close as possible to a real switch, then use
Gerd> the normal tools you use for real networks as well. I think
Gerd> uml_switch should just support a monitor port which will see
>> Not practical, not reliable.
Steve> Why not reliable? A monitor port is a diagnostic tool, and
What would I connect to the monitor port? Another UML?
This is the part that isn't practical.
My test cases sometimes have as many as 7 networks. Remember that we
have 170 test cases, and growing. Remember that we may have packets akin
to "ping-of-death", that may cause the Linux network stack to "oops".
(this isn't a good, but that's the point of regression tests... is to
make sure that old bugs do not get re-introduced)
So, we have to start the UMLs for each test, as they may have died.
To make it simple, we start/stop all of the UMLs each time.
The reason for having the ability to capture and play-back pcap files
in the uml_netjig is to eliminate the need to run as many UMLs.
Steve> There is no reason you would need to use Linux as your packet
Steve> source:
Steve> cat tcpdump.pcap | switch_mon_tool --socket /tmp/uml.mon
Steve> --delay 100ms
Steve> is the type of functionality I'm shooting for (above example
Steve> not to be taken literally).
Great. That works for 1 network.
Now, how do you replay packets where you need an actual time sequence
diagram to make it work? I.e.
- send packet A on network 1
- send packet B on network 2
- send packet C on network 1
- send packet D on network 2
In most cases, we have found round-robin amount input sources works
well, but in that we are disappointed with.
Further, remember that you may want to single step the packet sources,
because, you may spend *HOURS* in the debugger (with the UML in
question). That's hard with the method you proposed.
- --
] ON HUMILITY: to err is human. To moo, bovine. | firewalls [
] Michael Richardson, Xelerance Corporation, Ottawa, ON |net architect[
] [EMAIL PROTECTED] http://www.sandelman.ottawa.on.ca/mcr/ |device driver[
] panic("Just another Debian GNU/Linux using, kernel hacking, security guy"); [
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.2 (GNU/Linux)
Comment: Finger me for keys
iQCVAwUBQbd0NIqHRg3pndX9AQEZFgQA5vDKTWQviO9NSLr9Y6Pkvq23KQbWPop2
GyR04q/ALPlMSbdPqsJfHFsqCXLZF/gmftZH6Cp52XpXX4AO7+7x47aUDG7SW2ug
WxYjBJVqHBgBSJQNHkpcXwswqJPV4fidMyiN0X60PtmW+o6hMa/NXr9LPFcElwVw
FiEFd3ONQ7U=
=F82m
-----END PGP SIGNATURE-----
-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users.
Discover which products truly live up to the hype. Start reading now.
http://productguide.itmanagersjournal.com/
_______________________________________________
User-mode-linux-devel mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
