GAS: Replenish AP station session timer to 5 seconds

If remaining AP session timeout is less than 5 seconds
for an existing station, replenish the timeout to 5 seconds.
This allows stations to be able to recycle a dialog token
value beyond 5 seconds for GAS exchange.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>

src/ap/gas_serv.c

@@ -46,6 +46,8 @@ gas_dialog_create(struct hostapd_data *hapd, const u8 *addr, u8 dialog_token)
 		 * it to be that long.
 		 */
 		ap_sta_session_timeout(hapd, sta, 5);
+	} else {
+		ap_sta_replenish_timeout(hapd, sta, 5);
 	}
 
 	if (sta->gas_dialog == NULL) {

src/ap/sta_info.c

@@ -490,6 +490,18 @@ static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 }
 
 
+void ap_sta_replenish_timeout(struct hostapd_data *hapd, struct sta_info *sta,
+			      u32 session_timeout)
+{
+	if (eloop_replenish_timeout(session_timeout, 0,
+				    ap_handle_session_timer, hapd, sta)) {
+		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
+			       HOSTAPD_LEVEL_DEBUG, "setting session timeout "
+			       "to %d seconds", session_timeout);
+	}
+}
+
+
 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 			    u32 session_timeout)
 {

src/ap/sta_info.h

@@ -162,6 +162,8 @@ void ap_sta_hash_add(struct hostapd_data *hapd, struct sta_info *sta);
 void ap_free_sta(struct hostapd_data *hapd, struct sta_info *sta);
 void hostapd_free_stas(struct hostapd_data *hapd);
 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx);
+void ap_sta_replenish_timeout(struct hostapd_data *hapd, struct sta_info *sta,
+			      u32 session_timeout);
 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 			    u32 session_timeout);
 void ap_sta_no_session_timeout(struct hostapd_data *hapd,