[Click] Weird bridge behavior unpatched 2.6.31.12

[Lars Bro]

Hi, Eddie

FromDevice() has a PROMISC option, sorry. I did not notice that, and I will
try it. It was just that "ip link set promisc on..." did not function
correctly, FromDevice() only returned some of the packets.

I will let you know when I have tested it

Btw, It seems to work fine installing and uninstalling Click "on top of" a
brctl bridge. so click-uninstall recovers the bridge functionality correctly
when click is leaving. I do not use brctl on devices in use by a running
Click router.

yours,
Lars Bro

On Wed, Mar 17, 2010 at 5:09 PM, Eddie Kohler <kohler at cs.ucla.edu> wrote:

> Lars,
>
> I strongly recommend against mixing brctl with Click linuxpatchless.  Click
> REPLACES the bridge hook when it is installed.  I have no reason to believe
> brctl will work.
>
> Eddie
>
>
> Lars Bro wrote:
>
>> Hi,
>>
>> I have a click configuration where I need make a tap on the traffic
>> between
>> two hosts. Therefore, I have made a simple
>> "Bridge" element class like below:
>>  /*
>>   * Bridge between two interfaces and send IP packets to output
>>   */
>>  elementclass Bridge {
>>    \$if1, \$if2 |
>>    FromDevice(\$if1) ->
>>    if1_tee::Tee();
>>    FromDevice(\$if2) ->
>>    if2_tee::Tee();
>>    if1_tee\[0\] ->
>>    Queue() ->
>>    ToDevice(\$if2);
>>    if1_tee\[1\] ->
>>    Strip(14) ->
>>    output;
>>    if2_tee\[0\] ->
>>    Queue() ->
>>    ToDevice(\$if1);
>>    if2_tee\[1\] ->
>>    Strip(14) ->
>>    output;
>>  };
>>
>> When the test router is not running, I will of course need the bridging
>> functionality anyway, so I do
>>  brctl addbr br0
>>  brctl addif br0 xxx
>>  brctl addif br0 yyy
>>  ip link set up dev br0
>>
>> Before starting the router. I remove the bridge and set the interfaces up
>>  ip link set down dev br0
>>  brctl delbr br0
>>  ip link set up dev xxx
>>  ip link set up dev yyy
>>  click-install ...
>>
>> This seems not to work, however. It seems that only broadcast traffic (and
>> maybe also traffic directly for the xxx and yyy
>> MAC addrees, but I dont know, since I am trying to make a bridge)
>>
>> If I try with
>>  ip link set xxx promisc on
>>  ip link set yyy promisc on
>>
>> I get "some" data through, still not good enough
>>
>> But if I start the router without removing the original bridge, it works
>> fine as far as I can see.
>>
>> Is this as it is supposed to be ?
>>
>>
>> yours,
>> Lars Bro
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>> click at amsterdam.lcs.mit.edu
>> https://amsterdam.lcs.mit.edu/mailman/listinfo/click
>>
>