netdev - Re: [PATCH] bridge: Add support for IEEE 802.11 Proxy ARP

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Message-ID: <20141027182032.1c5dcffa@urahara>
Date:	Mon, 27 Oct 2014 18:20:32 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	Kyeyoon Park <kyeyoonp@....qualcomm.com>
Cc:	davem@...emloft.net, jouni@....qualcomm.com, netdev@...r.kernel.org
Subject: Re: [PATCH] bridge: Add support for IEEE 802.11 Proxy ARP

On Thu, 23 Oct 2014 14:49:17 -0700
Kyeyoon Park <kyeyoonp@....qualcomm.com> wrote:

> From: Kyeyoon Park <kyeyoonp@...eaurora.org>
> 
> This feature is defined in IEEE Std 802.11-2012, 10.23.13. It allows
> the AP devices to keep track of the hardware-address-to-IP-address
> mapping of the mobile devices within the WLAN network.
> 
> The AP will learn this mapping via observing DHCP, ARP, and NS/NA
> frames. When a request for such information is made (i.e. ARP request,
> Neighbor Solicitation), the AP will respond on behalf of the
> associated mobile device. In the process of doing so, the AP will drop
> the multicast request frame that was intended to go out to the wireless
> medium.
> 
> It was recommended at the LKS workshop to do this implementation in
> the bridge layer. vxlan.c is already doing something very similar.
> The DHCP snooping code will be added to the userspace application
> (hostapd) per the recommendation.
> 
> This RFC commit is only for IPv4. A similar approach in the bridge
> layer will be taken for IPv6 as well.
> 
> Signed-off-by: Kyeyoon Park <kyeyoonp@...eaurora.org>

Looks good. Maybe at some point VXLAN and bridge should share
more code or at least the same options.

I a little worried that this could be DoS'd.


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