Hi,

are the nodes connected via another interface, such as Ethernet? Then
those beacons might arrive through that one...

Stephan



Am Donnerstag, den 04.05.2017, 17:15 +0100 schrieb Leonel Gaspar
Soares:
> Thanks, I will look into your simulation, but what I don't understand
> is why, even with blocked traffic in one node (with say iptables -A
> INPUT -o wlan0 -j REJECT and iptables -A OUTPUT -o wlan0 -j REJECT),
> this node still listens to packets UDP of MIH in tcpdump and
> whireshark still is displaying these packets... why do they keep
> coming, even when the traffic is blocked in this node?
>
> On Thu, May 4, 2017 at 1:25 PM, Martin Wegner <wegner@ibr.cs.tu-bs.de
> > wrote:
> > Hey,
> >
> > we developed also a simulator here at IBR which can be used to
> > simulate
> > a multitude of DTN nodes via VMs running on one or several hosts.
> > The
> > simulator is called Hydra (paper [0], code [1], complete rewrite in
> > repos [2-4]).
> >
> > It came to my mind regarding your issue, as Hydra allowed
> > communication
> > between VMs, if the nodes were in communication range according to
> > their
> > mobility, by setting up the corresponding iptables rules. You can
> > find
> > the exact rules that were used at [5, 6].
> > Maybe you can extract them for your purpose, or maybe even use
> > Hydra
> > directly.
> >
> > [0] https://www.ibr.cs.tu-bs.de/bib/xml/HYDRA.html
> > [1] https://github.com/morgenroth/hydrasim/
> > [2] https://github.com/morgenroth/hydra-node
> > [3] https://github.com/morgenroth/hydra-webmanager
> > [4] https://github.com/morgenroth/hydra-slave
> > [5]
> > https://github.com/morgenroth/hydrasim/blob/master/slave/src/contro
> > l.py#L151
> > [6]
> > https://github.com/morgenroth/hydra-slave/blob/master/hydraslave/co
> > ntrol.py#L380
> >
> > Best, Martin Wegner
> >
> > On 05/03/17 22:12, Leonel Gaspar Soares wrote:
> > > Thanks for the guidance! In my simulation, I have one more
> > issue... I
> > > want to block traffic in nodes, wifi interface, but iptables
> > rules don't
> > > seem to block the UDP packetes from MIH in port 4551 (discovery
> > > beacons?)... I've tried
> > >
> > >
> > > iptables -A INPUT -i adhoc -j REJECT
> > > iptables -A OUTPUT -o adhoc -j REJECT
> > >
> > > iptables -A FORWARD -i adhoc -o adhoc -j REJECT
> > > iptables -A FORWARD -i adhoc -o adhoc -j REJECT
> > >
> > > ip6tables -A INPUT -i adhoc -j REJECT
> > > ip6tables -A OUTPUT -o adhoc -j REJECT
> > >
> > > iptables -A INPUT  -m pkttype --pkt-type multicast -j REJECT
> > > iptables -A OUTPUT -m pkttype --pkt-type multicast -j REJECT
> > >
> > > iptables -A FORWARD  -m pkttype --pkt-type multicast -j REJECT
> > > iptables -A FORWARD -m pkttype --pkt-type multicast -j REJECT
> > >
> > > But I can not simulate connectivity loss, beacause udp packets in
> > port
> > > 4551 keep on comming, although these rules are applied... anyone
> > tried
> > > iptables for simulation of connectivity loss with ibr-dtn?
> > >
> > >
> >
> > --
> > ,---- [ contact info ]
> > | Martin Wegner, M.Sc.
> > | IBR, research group Connected and Mobile Systems
> > | Technische Universität Braunschweig
> > | office:
> > |   Mühlenpfordtstraße 23, room 131
> > |   38106 Braunschweig, Germany
> > | phone: +49 531 391 3246
> > | mail: wegner@ibr.cs.tu-bs.de
> > | GnuPG key: 0x04210FF947C76DD7
> > `----
> >
> >
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