mfc, IP Header

microsoft.public.vc.mfc - Microsoft Visual C


mfc >> IP Header

by Duncan » Mon, 22 Nov 2004 22:56:08 GMT

Hi,
Not sure whether this is the right place to ask, but as I'm using MFC as the
basis I thought I'd start here.

Does anyone know whether it's possible to access the IP Header ...
specifically the dscp bits sometimes used by service providers to decide
Class of Service across their networks. I want to create a utility where I
can specifically set the dscp bits to choose a particular class of service
for a sream of traffic across a network and measure response times. I then
would change the values, rerun the tests and compare the results.

The idea is to have a utility that will allow me to test whether the network
behaves as I want it to for various CoS values.

thanks,
Duncan



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mfc >> RE: IP Header

by RS1XYW4 » Mon, 31 Jan 2005 18:09:03 GMT


You may have already had this answered but what you need to use is
either/both of

(i) TcMon.exe - this is a Windows 2000 GUI utlity with apparently not much
documentation. It sits on top of the Traffic control QoS API and allows you
to create
flows, add filters to that flow and then effect DSCP markings..well almost.
You will be able to mark specific IP packets (according to your filter) with
a class of service however if you want to mark specific DSCP values you'll
have to override the marking in the registry. If you do a google you should
find what you are after. I suspect that you may be better wiring your own
little app and use the TC API to do what you are after. PS you'll also need
to install the QoS PAcket Scheduler on the NIC you are using..easy..just do a
search on Ms for this.

(ii) Traffic Control QoS APU - allows your client application to register
with the TC and set up flows, filters as you please

Spookily I need to do EXACTYL the same as you so if you could point me at
some example code that'd be good :))

Best Regards
E-Wan






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