Re: [RFC 2/2] cfg80211/nl80211: Enable drivers to implement mac address based ACL

[Kalle Valo <kvalo@qca.qualcomm.com>]

On 09/03/2012 03:23 PM, Vasanthakumar Thiagarajan wrote:
> This patch enables drivers to implement mac address based
> access control in AP/P2P GO mode. There is a new flag in
> nl80211_feature_flags (NL80211_FEATURE_MAC_ACL) for drivers
> to advertise this capability. There are two acl policies, white
> and black list, under which an acl list can be configured in the
> driver. Driver has to advertise the maximum number of mac address
> entries in acl list through max_acl_mac_addrs of wiphy.
> 
> ACL is enabled/disabled based on attribute NL80211_ATTR_MAC_ACL which
> is passed in start_ap. A list of stations' mac addresses is set
> using NL80211_CMD_SET_MAC_ACL.

I would prefer a bit more documentation how this works from user space
or driver's point of view. I think I can guess how it's supposed to
work, but it would be good to document it explicitly. For example, it
wasn't clear how he driver must function when NL80211_ACL_POLICY_ACCEPT
or DENY is used.

> Driver may have to make sure to clear it's acl list when doing start/stop ap.

s/may/must/?

Kalle