• Kyeyoon Park's avatar
    bridge: Add support for IEEE 802.11 Proxy ARP · 95850116
    Kyeyoon Park authored
    
    
    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: default avatarKyeyoon Park <kyeyoonp@codeaurora.org>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    95850116