Commit ffa9598e authored by Johannes Berg's avatar Johannes Berg
Browse files

wifi: mac80211: add ieee80211_find_sta_by_link_addrs API 



Add a new API function ieee80211_find_sta_by_link_addrs()
that looks up the STA and link ID based on interface and
station link addresses.

We're going to use it for mac80211-hwsim to track on the
AP side which links are active.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent efe9c2bf

include/net/mac80211.h

+16 −0
Original line number Diff line number Diff line
@@ -5986,6 +5986,22 @@ struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 
					       const u8 *addr,

					       const u8 *localaddr);



/**

 * ieee80211_find_sta_by_link_addrs - find STA by link addresses

 * @hw: pointer as obtained from ieee80211_alloc_hw()

 * @addr: remote station's link address

 * @localaddr: local link address, use %NULL for any (but avoid that)

 * @link_id: pointer to obtain the link ID if the STA is found,

 *	may be %NULL if the link ID is not needed

 *

 * Obtain the STA by link address, must use RCU protection.

 */

struct ieee80211_sta *

ieee80211_find_sta_by_link_addrs(struct ieee80211_hw *hw,

				 const u8 *addr,

				 const u8 *localaddr,

				 unsigned int *link_id);



/**

 * ieee80211_sta_block_awake - block station from waking up

 * @hw: the hardware

net/mac80211/sta_info.c

+37 −0
Original line number Diff line number Diff line
@@ -274,6 +274,43 @@ link_sta_info_get_bss(struct ieee80211_sub_if_data *sdata, const u8 *addr) 
	return NULL;

}



struct ieee80211_sta *

ieee80211_find_sta_by_link_addrs(struct ieee80211_hw *hw,

				 const u8 *addr,

				 const u8 *localaddr,

				 unsigned int *link_id)

{

	struct ieee80211_local *local = hw_to_local(hw);

	struct link_sta_info *link_sta;

	struct rhlist_head *tmp;



	for_each_link_sta_info(local, addr, link_sta, tmp) {

		struct sta_info *sta = link_sta->sta;

		struct ieee80211_link_data *link;

		u8 _link_id = link_sta->link_id;



		if (!localaddr) {

			if (link_id)

				*link_id = _link_id;

			return &sta->sta;

		}



		link = rcu_dereference(sta->sdata->link[_link_id]);

		if (!link)

			continue;



		if (memcmp(link->conf->addr, localaddr, ETH_ALEN))

			continue;



		if (link_id)

			*link_id = _link_id;

		return &sta->sta;

	}



	return NULL;

}

EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_link_addrs);



struct sta_info *sta_info_get_by_addrs(struct ieee80211_local *local,

				       const u8 *sta_addr, const u8 *vif_addr)

{