usteer: add connected-since

Fetch the age of the association for STAs in order to implement minimum
intervals after which a STA is considered kickable.

Signed-off-by: David Bauer <mail@david-bauer.net>

nl80211.c

@@ -269,6 +269,9 @@ static void nl80211_update_sta(struct usteer_node *node, struct sta_info *si)
 
 	if (tb_sta[NL80211_STA_INFO_SIGNAL_AVG])
 		signal = (int8_t) nla_get_u8(tb_sta[NL80211_STA_INFO_SIGNAL_AVG]);
+	
+	if (tb_sta[NL80211_STA_INFO_CONNECTED_TIME])
+		si->connected_since = current_time - (nla_get_u32(tb_sta[NL80211_STA_INFO_CONNECTED_TIME]) * 1000);
 
 	usteer_sta_info_update(si, signal, true);
 

sta.c

@@ -150,6 +150,7 @@ void usteer_sta_disconnected(struct sta_info *si)
 {
 	si->connected = STA_NOT_CONNECTED;
 	si->kick_time = 0;
+	si->connected_since = 0;
 	usteer_sta_info_update_timeout(si, config.local_sta_timeout);
 }
 

ubus.c

@@ -403,6 +403,7 @@ usteer_ubus_get_connected_clients(struct ubus_context *ctx, struct ubus_object *
 			blobmsg_add_u32(&b, "signal", si->signal);
 			blobmsg_add_u64(&b, "created", si->created);
 			blobmsg_add_u64(&b, "seen", si->seen);
+			blobmsg_add_u64(&b, "connected_since", si->connected_since);
 			blobmsg_add_u64(&b, "last_connected", si->last_connected);
 
 			t = blobmsg_open_table(&b, "snr-kick");

usteer.h

@@ -241,7 +241,10 @@ struct sta_info {
 	struct sta_info_stats stats[__EVENT_TYPE_MAX];
 	uint64_t created;
 	uint64_t seen;
+
+	uint64_t connected_since;
 	uint64_t last_connected;
+
 	int signal;
 
 	uint8_t rrm;