netdev - problem with tagged/untagged vlan and bridging

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <200808251603.41301.timo@tiwe.de>
Date:	Mon, 25 Aug 2008 16:03:37 +0200
From:	Timo Weingärtner <timo@...e.de>
To:	netdev@...r.kernel.org
Subject: problem with tagged/untagged vlan and bridging

Hi all,

Last Thursday I bought a wireless access point with multi-ssid (D-Link DWL 
2100AP). Management of the AP and RADIUS stuff is done without VLAN tags, the 
first SSID is also without tags. The other SSIDs have VLAN IDs configurable.

My first SSID is quasi-disabled by having the RADIUS always reject access 
requests, a second uses VLAN 3.

The access point is connected to my Xen machine on dev hme2. The VLAN 
subdevice hme2.3 is enslaved to br_3, the main device hme2 to br_4.

Wireshark is showing that packets coming in to hme2 with VLAN 3 go to br_4 
with VLAN tags instead of hme2.3 and then br_3. When I remove hme2 from br_4 
everything works the way I expect it to, but the AP has no connection to the 
RADIUS (on vif4.0) anymore.

I expect the VLAN subdevices to grab their packets from the master first and 
leave the rest for the bridge.

Am I doing anything wrong or is this a bug?

I use 2.6.16.62 with the sunhme vlan patch[1] because of complications with 
Xen. "git log v2.6.16..HEAD -- net/8021q/ net/bridge/" does not appear to 
show anyhing that might have fixed it.

Some config info is attached. Ask for more if you need it.

Thanks in advance
Timo

[1] a5a97263a9fd6a94f954d41ae3233ea65a90bd8a

View attachment "ip l" of type "text/plain" (2609 bytes)

View attachment "brctl show" of type "text/plain" (887 bytes)

View attachment "proc_net_vlan_*" of type "text/plain" (3631 bytes)

Download attachment "signature.asc " of type "application/pgp-signature" (490 bytes)