I've been doing some similar tests on setting the "reserved" flag in the IP header (evil bit) and have given up trying to do it in Windows since they have blocked a lot of access to the raw IP socket...
Toby ____________________________________________________________________ Toby Moncaster, <[email protected]> Networks Research Centre, BT B54/70 Adastral Park, Ipswich, IP53RE, UK. +44 7918 901170 > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Ingemar Johansson S > Sent: 24 August 2009 07:22 > To: Piers O'Hanlon > Cc: iccrg; tsv-area > Subject: [Iccrg] RE: [tsv-area] Testing ECN support for UDP flows > > Hi > > Thanks for the input, seems like it is just an unnecessary complication > to run on an MS-Windows PC. > > /Ingemar > > > -----Original Message----- > > From: [email protected] [mailto:[email protected]] On > > Behalf Of Piers O'Hanlon > > Sent: den 21 augusti 2009 11:40 > > To: Ingemar Johansson S > > Cc: tsv-area; iccrg; Colin Perkins; carlberg; Mikael Abrahamsson > > Subject: Re: [tsv-area] Testing ECN support for UDP flows > > > > 2009/8/21 Mikael Abrahamsson <[email protected]>: > > > On Fri, 21 Aug 2009, Ingemar Johansson S wrote: > > > > > >> Tried with an MS-Windows version of tracert (ftrace), it > > was supposed > > >> to be able to set the ToS field. However it seems like when I run > > >> wireshark that the modified ToS field does not stick, it could be > > >> some Windows specific feature that simply clears the ToS field. I > > >> will try some traceroute tests on our Linux boxes next > > week when I really start working. > > >> It could be that this will do. > > > > > > http://technet.microsoft.com/en-us/magazine/2007.02.cableguy.aspx > > > > > > In some versions of Windows you have to change the registry to be > > > allowed to set any TOS bits, perhaps this is what's missing? > > > > > Yes and as Jonathon Lennox pointed out in the AVT WG it's no > > longer possible to set the TOS bit directly in Vista (the > > registry tweak no longer works) as mentioned in the above > > article. It seems one has to use their QoS APIs and I don't > > think they allow you to touch the ECN bits. > > > > Piers > > > > > -- > > > Mikael Abrahamsson email: [email protected] > > > > > > > _______________________________________________ > Iccrg mailing list > [email protected] > http://oakham.cs.ucl.ac.uk/mailman/listinfo/iccrg
