Bridging wlan to gif?

[Julian Elischer]

Paul Schenkeveld wrote:
> Hi,
> 
> I'm trying to bridge a wlan interface to a gif tunnel on 8.0-BETA2.
> Running tcpdump on wlan0 I see DHCP packets coming in as IP packets,
> on gif0 however tcpdump shows ethernet headers prepended.  Needless
> to say things do not work as expected.
> 
> What I try to accomplish is the following:
> 
>   +------+      +--------------+     +-------+
>   |      | .... |ath0      bge0|-----|Router |     Gateway
>   |      |      |wlan0     gif0|     +-------+    +----------+
>   |      |      | \       /    |         |        |  gif0    |
>   |      |      |  bridge0     |      Internet    |    \     |
>   |      |      |              |         |        |  bridge0 |
>   +------+      +--------------+     +-------+    |       \  |
>     Wifi          Access point       |Router |----|fxp0  fxp1|---- LAN X
>    client          8.0-BETA2         +-------+    +----------+
> 

nice diagram....

you can't bridge gif as it doesn't have a MAC header
if yo want to bridge the wifi net and LAN X then tha tis another 
matter and you can probably do that., but you are goin gto have to use 
a different way to do it..


Might I suggest a netgraph bridge, where the tunnel is implemented as 
a tcp or UDP socket layer (optionally with ipsec).

use a netgraph bridge node on each side, and connect them
using ksocket nodes which are linked to each other.

you might also find that you can use mpd as a good link between them.

I've done this in the past but do not have working examples in
front of me.





>  - The Wifi client must be part of LAN X and receive a DHCP address from
>    a DHCP server (not shown) on LAN X
>  - On the access point wlan0 and gif0 are bridged together
>  - On the gateway fxp1 and gif0 are bridged together
>  - Gif0 on the access point and gif0 on the gateway communicate correctly
>    when given IP addresses
> 
> Regards,
> 
> Paul Schenkeveld
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