Will MadWifi monitor mode even allow you to transmit at all? That might be something to test - the fact that pings don't work seem to indicate otherwise. It might put the interface into a receive-only mode... I'm not sure about this though - I develop on FreeBSD, not Linux.
- Ian [email protected] wrote: > Hello again, Clickers > > I need some assistance... > > The click script below creates a "station" device and does very little > with it. When I run this script on two nodes in Ad-Hoc mode, it works > fine. When I run it in Madwifi's Monitor mode, it doesn't work... > > FromHost(station, 192.168.1.2/24) // use a different IP for each node! > -> Print("FromHost") > -> Queue > -> to_dev :: ToDevice (ath0); > > FromDevice(ath0, PROMISC true) > // 802.11 headers configured in MadWifi, so there's no need for PrismDecap etc > -> Print("FromDevice") > //-> CheckIPHeader(14) > //-> GetIPAddress(16) > -> ToHost(station); > > Before anybody jumps on me, I know that I'm doing dubious things here. > I know that under Ad-hoc mode the wireless driver will convert my > Ethernet frames into 802.11 frames. Under Monitor mode, I am > transmitting raw Ethernet frames - which is what I want for this > experiment. I know too that I should filter incoming packets to > differentiate between my data and other traffic (such as spurious > beacons and 802.11 traffic)... I'll get there... > > I use PING to test whether I can communicate over the "station" > device. Pings work fine in ad-hoc mode, but in monitor mode they > don't. My packets appear to arrive at the recipient OK - I print them > after FromDevice(). But it seems like Linux loses the packets after > that. > > I have a suspicion that Linux might be silently dropping my packets > because they are not correctly annotated. On a whim, I tried adding a > GetIPAddress(16) - but that didn't help. > > Am I missing something? I spent until 1-o-clock this morning trying > to figure this stuff out. Any help would be greatly appreciated! > > Thanks! > - Kevin > > > > _______________________________________________ > click mailing list > [email protected] > https://amsterdam.lcs.mit.edu/mailman/listinfo/click _______________________________________________ click mailing list [email protected] https://amsterdam.lcs.mit.edu/mailman/listinfo/click
