I get the impression (from the article) that 802.11 wireless framing includes a sequence number. Maybe it is the "sequence control" in the diagram here: https://en.wikipedia.org/wiki/802.11_Frame_Types. If so, OVS doesn't have or provide access to it, so it can't calculate gaps.
On Wed, Nov 04, 2020 at 09:20:33AM +0000, Soliman Awad Alshra´a Abdullah TU Ilmenau wrote: > > Dear Ben, > > I see what you meant, but the author speaks about using the ovs, Does not he > ?. So from my side, no difference if it is wireless or wire network ? > > Thanks > > M.Sc Abdullah Soliman > Technische Universität Ilmenau > Fakultät für Elektrotechnik und Informationstechnik > Fachgebiet Kommunikationsnetze > Besucheradresse: > Helmholtzplatz 2 > 98693 Ilmenau > > Postadresse: > PF 10 05 65 > 98684 Ilmenau > > > Telefon > > +49 3677 69-2698 > > [cid:[email protected]] > [email protected]<mailto:[email protected]> > [cid:[email protected]] > www.tu-ilmenau.de/it-kn<https://www.tu-ilmenau.de/it-kn> > > [cid:[email protected]] > > > > [cid:[email protected]] > > > > ________________________________ > From: Ben Pfaff <[email protected]> > Sent: 03 November 2020 17:52:19 > To: Soliman Awad Alshra´a Abdullah TU Ilmenau > Cc: [email protected] > Subject: Re: [ovs-dev] Is the Open Flow switch able to calculate the gap of > sequence number > > Oh, it's about wireless. OVS doesn't have special 802.11 support. > > On Tue, Oct 27, 2020 at 06:51:08AM +0000, Soliman Awad Alshra´a Abdullah TU > Ilmenau wrote: > > > > Dear sir, > > > > > > Attached you find the requested article > > > > Thanks > > M.Sc Abdullah Soliman > > Technische Universität Ilmenau > > Fakultät für Elektrotechnik und Informationstechnik > > Fachgebiet Kommunikationsnetze > > Besucheradresse: > > Helmholtzplatz 2 > > 98693 Ilmenau > > > > Postadresse: > > PF 10 05 65 > > 98684 Ilmenau > > > > > > Telefon > > > > +49 3677 69-2698 > > > > [cid:[email protected]] > > [email protected]<mailto:[email protected]> > > [cid:[email protected]] > > www.tu-ilmenau.de/it-kn<https://www.tu-ilmenau.de/it-kn<http://www.tu-ilmenau.de/it-kn<https://www.tu-ilmenau.de/it-kn>> > > > > [cid:[email protected]] > > > > > > > > [cid:[email protected]] > > > > > > > > ________________________________ > > From: Ben Pfaff <[email protected]> > > Sent: 26 October 2020 18:44:03 > > To: Soliman Awad Alshra´a Abdullah TU Ilmenau > > Cc: [email protected] > > Subject: Re: [ovs-dev] Is the Open Flow switch able to calculate the gap of > > sequence number > > > > On Fri, Oct 23, 2020 at 02:38:06PM +0000, Soliman Awad Alshra´a Abdullah TU > > Ilmenau wrote: > > > OpenFLow switch is able to keep track of the sequence number of each > > > traffic flow to detect MAC spoofing attack. Upon reception of a frame, > > > the algorithm calculates the gap G between the sequence number of the > > > current frame and that of the last frame received from the same source > > > address. If G = 0, the current frame is considered as a re-transmitted > > > frame, while if G = 1 or G = 2, the current frame is considered the right > > > one. But, if the gap between the current frame and previous frame is in > > > between 3 and 4096, then it is considered an abnormal sequence number. > > > > > > In my case, I use Ryu Controller and I would like to do the same work, > > > where the switch sends the alert to the controller after the switch > > > detects the gap. > > > > This doesn't make sense to me. Frames don't have sequence numbers. > > > > Can you cite the publication that makes this claim? > > _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
