> @@ -2242,6 +2242,20 @@ static int ieee80211_set_wds_peer(struct wiphy
> *wiphy, struct net_device *dev,
> return 0;
> }
>
> +static int ieee80211_set_multicast_to_unicast(struct wiphy *wiphy,
> + struct net_device
> *dev,
> + const bool enabled)
I don't understand why you put this with set_wds_peer, please add it
here also at the end like anywhere else - I've changed that for you in
the cfg80211 patch.
> + struct ieee80211_sub_if_data *sdata =
> IEEE80211_DEV_TO_SUB_IF(dev);
> +
> + if (sdata->vif.type != NL80211_IFTYPE_AP)
> + return -1;
Not needed. Also, don't ever just blindly return -1 in the kernel, that
means -EPERM, i.e. permission denied.
> +/* rewrite destination mac address */
that's a pretty useless comment ...
> +/* Check if multicast to unicast conversion is needed and do it.
> + * Returns 1 if skb was freed and should not be send out.
Follow kernel convention of returning a negative error code, e.g.
-ENOTCONN in this case, and remove this comment.
> + /* clone packets and update destination mac */
> + list_for_each_entry_rcu(sta, &local->sta_list, list) {
> + if (sdata != sta->sdata)
> + continue;
> + if (unlikely(!ether_addr_equal(eth->h_source, sta-
> >sta.addr)))
> + /* do not send back to source */
> + continue;
> + if (!prev) {
> + prev = sta;
> + continue;
> + }
> + cloned_skb = skb_clone(skb, GFP_ATOMIC);
> + if (unlikely(ieee80211_change_da(cloned_skb, prev)))
> {
> + dev_kfree_skb(cloned_skb);
> + continue;
> + }
> + __ieee80211_subif_start_xmit(cloned_skb, cloned_skb-
> >dev, 0);
I don't like the recursion here.
I think we can call this from ieee80211_subif_start_xmit(), and then do
something like
if (unlikely(multicast)) {
struct skb_queue queue;
__skb_queue_head_init(&queue);
convert_frames(
while ((skb = __skb_dequeue(&queue))
__ieee80211_subif_start_xmit(...);
} else {
__ieee80211_subif_start_xmit(...);
}
Yes, that's a little less efficient (RCU stuff, although that could
even move in theory), but it avoids the recursion which imho is better.
johannes
