Add suspend/resume notifications

wpa_supplicant can now be notified of suspend/resume events, e.g.,
from pm-action scripts. This allows wpa_supplicant to clear information
that may become invalid during a suspend operation.

src/drivers/driver.h

@@ -1731,6 +1731,18 @@ struct wpa_driver_ops {
 	 * normal station operations like scanning to be completed.
 	 */
 	int (*deinit_ap)(void *priv);
+
+	/**
+	 * suspend - Notification on system suspend/hibernate event
+	 * @priv: Private driver interface data
+	 */
+	void (*suspend)(void *priv);
+
+	/**
+	 * resume - Notification on system resume/thaw event
+	 * @priv: Private driver interface data
+	 */
+	void (*resume)(void *priv);
 };
 
 

src/drivers/driver_ndis.c

@@ -3272,5 +3272,7 @@ const struct wpa_driver_ops wpa_driver_ndis_ops = {
 	NULL /* cancel_remain_on_channel */,
 	NULL /* probe_req_report */,
 	NULL /* disable_11b_rates */,
-	NULL /* deinit_ap */
+	NULL /* deinit_ap */,
+	NULL /* suspend */,
+	NULL /* resume */
 };

src/drivers/driver_nl80211.c

@@ -4996,6 +4996,16 @@ static int wpa_driver_nl80211_deinit_ap(void *priv)
 }
 
 
+static void wpa_driver_nl80211_resume(void *priv)
+{
+	struct wpa_driver_nl80211_data *drv = priv;
+	if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1)) {
+		wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
+			   "resume event");
+	}
+}
+
+
 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
 	.name = "nl80211",
 	.desc = "Linux nl80211/cfg80211",
@@ -5053,4 +5063,5 @@ const struct wpa_driver_ops wpa_driver_nl80211_ops = {
 	.release_interface_addr = wpa_driver_nl80211_release_interface_addr,
 	.disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
 	.deinit_ap = wpa_driver_nl80211_deinit_ap,
+	.resume = wpa_driver_nl80211_resume,
 };