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Ticket #1507 (new defect)

Opened 14 years ago

Last modified 14 years ago

Deauthentication frames and promiscuous mode

Reported by: msmith@cbnco.com Assigned to:
Priority: minor Milestone:
Component: madwifi: 802.11 stack Version: trunk
Keywords: Cc: msmith@cbnco.com
Patch is attached: 1 Pending:

Description

If a station's interface is in promiscuous mode, and it sees a deauth frame sent to another station, it processes it as if it were meant for the local system.

I have a bunch of clients in promiscuous mode because they are bridging ath0 to eth0. But you can see this without bridging, just "tcpdump -ni ath0" and on the master "iwpriv ath0 kickmac some:other:mac". I see it a lot because I have some flaky distant clients that don't always make it through WPA2-PSK authentication on the first try; the master deauths the flaky client, but the reliable clients also drop off because they see the deauth frame.

I'm using trunk r2518 from June 26. I'm attaching a naive patch that just checks for DA == local MAC in ieee80211_input() for deauth and disassoc frames. For me it does the trick, but I don't know if it is the right way.

Attachments

madwifi-promisc-mgmt.patch.txt (0.7 kB) - added by msmith@cbnco.com on 08/13/07 20:47:18.
Discard non-local-dest deauth and disassoc frames

Change History

08/13/07 20:47:18 changed by msmith@cbnco.com

  • attachment madwifi-promisc-mgmt.patch.txt added.

Discard non-local-dest deauth and disassoc frames

08/17/07 12:10:09 changed by rozteck@interia.pl

Hmm. I think the way is right. I wonded why it haven't been checked already in the code. If I will have some free time I will make such configuration and test. In the meantime I think you should sign-off the patch.