Remove inactivity timeout for wired interfaces

We should unconditionally remove inactivity timers for wired network
cases. This commit checks for this after a new station association:

   hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED

and then cancels the timeout and does not register a new one.

It prints out a debug message like this:

1476740180.276286: IEEE 802.1X: 00:02:00:00:00:07 CTRL_DIR entering
state FORCE_BOTH
1476740180.276295: hostapd_new_assoc_sta: canceled wired ap_handle_timer
timeout for 00:02:00:00:00:07

This was tested on a debian jessie amd64 system with a configured 120
second inactivity timer and the session did not timeout.

Signed-off-by: Sam Tannous <stannous@cumulusnetworks.com>

src/ap/hostapd.c

@@ -2832,7 +2832,16 @@ void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
 	} else
 		wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
 
-	if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
+	if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED) {
+		if (eloop_cancel_timeout(ap_handle_timer, hapd, sta) > 0) {
+			wpa_printf(MSG_DEBUG,
+				   "%s: %s: canceled wired ap_handle_timer timeout for "
+				   MACSTR,
+				   hapd->conf->iface, __func__,
+				   MAC2STR(sta->addr));
+		}
+	} else if (!(hapd->iface->drv_flags &
+		     WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
 		wpa_printf(MSG_DEBUG,
 			   "%s: %s: reschedule ap_handle_timer timeout for "
 			   MACSTR " (%d seconds - ap_max_inactivity)",