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wifi: mac80211: add ieee80211_find_sta_by_link_addrs API

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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: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2022-09-02 16:12:43 +02:00
parent efe9c2bfd1
commit ffa9598ecb
2 changed files with 53 additions and 0 deletions
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16
include/net/mac80211.h
View File

@ -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

37
net/mac80211/sta_info.c
View File

@ -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)
{