2010/3/24 Gábor Stefanik <netrolller.3d@xxxxxxxxx>: > On Wed, Mar 24, 2010 at 9:43 AM, Anthony <lazugau@xxxxxxxxx> wrote: >> Hi all, >> I'm using: >> Ubuntu 9.10 >> Atheros card with ath9k >> compat-wireless latest stable version >> ad-hoc 802.11g with 2 nodes (same hardware & software configuration) >> >> I tried to inject packets using mac80211 (similar way as in packetspammer) >> Radiotap header contains only Flag=0 & Rate=1Mbps (total size = 14 bytes) >> However when I use wireshark to capture traffic, I discovered that >> each frame was sent twice: >> first time with 14 bytes radiotap header >> second time with 13 bytes of radiotap header (Rate omitted), so 54Mbps here. > > Are you sure it is not the AP relaying the packet? Sorry, I had a blonde moment and didn't notice that you are using adhoc. > >> >> Is this a problem of ath9k or a default feature of 802.11 ??? >> >> Another question: if I set the FCS flag to send frame with all zeros >> FCS, the receiver reported frame as bad FCS, but still deliver it to >> upper layer. Why? I think the frame should be discarded ? I want to >> simulate broken phy link by jamming FCS. Is there any alternative way >> ? >> >> Hope some one can help. >> >> Thank you. >> >> Anthony >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-wireless" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > > > > -- > Vista: [V]iruses, [I]ntruders, [S]pyware, [T]rojans and [A]dware. :-) > -- Vista: [V]iruses, [I]ntruders, [S]pyware, [T]rojans and [A]dware. :-) -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
