P2P: Add method to signal lost device

This signal is used to notify users of the P2P
state machine or wpa_supplicant of lost devices.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

src/p2p/p2p.c

@@ -560,6 +560,8 @@ static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
 	if (p2p->pending_client_disc_go == dev)
 		p2p->pending_client_disc_go = NULL;
 
+	p2p->cfg->dev_lost(p2p->cfg->cb_ctx, dev->info.p2p_device_addr);
+
 	os_free(dev);
 }
 

src/p2p/p2p.h

@@ -441,6 +441,15 @@ struct p2p_config {
 			  const struct p2p_peer_info *info,
 			  int new_device);
 
+	/**
+	 * dev_lost - Notification of a lost P2P Device
+	 * @ctx: Callback context from cb_ctx
+	 * @dev_addr: P2P Device Address of the lost P2P Device
+	 *
+	 * This callback is used to notify that a P2P Device has been deleted.
+	 */
+	void (*dev_lost)(void *ctx, const u8 *dev_addr);
+
 	/**
 	 * go_neg_req_rx - Notification of a receive GO Negotiation Request
 	 * @ctx: Callback context from cb_ctx

wpa_supplicant/notify.c

@@ -351,8 +351,16 @@ void wpas_notify_resume(struct wpa_global *global)
 
 
 #ifdef CONFIG_P2P
+
 void wpas_notify_p2p_device_found(struct wpa_supplicant *wpa_s,
 				  const u8 *dev_addr, int new_device)
 {
 }
+
+
+void wpas_notify_p2p_device_lost(struct wpa_supplicant *wpa_s,
+				 const u8 *dev_addr)
+{
+}
+
 #endif /* CONFIG_P2P */

wpa_supplicant/notify.h

@@ -80,5 +80,7 @@ void wpas_notify_resume(struct wpa_global *global);
 
 void wpas_notify_p2p_device_found(struct wpa_supplicant *wpa_s,
 				  const u8 *dev_addr, int new_device);
+void wpas_notify_p2p_device_lost(struct wpa_supplicant *wpa_s,
+				 const u8 *dev_addr);
 
 #endif /* NOTIFY_H */

wpa_supplicant/p2p_supplicant.c

@@ -1151,6 +1151,14 @@ void wpas_dev_found(void *ctx, const u8 *addr,
 }
 
 
+static void wpas_dev_lost(void *ctx, const u8 *dev_addr)
+{
+	struct wpa_supplicant *wpa_s = ctx;
+
+	wpas_notify_p2p_device_lost(wpa_s, dev_addr);
+}
+
+
 static int wpas_start_listen(void *ctx, unsigned int freq,
 			     unsigned int duration,
 			     const struct wpabuf *probe_resp_ie)
@@ -2331,6 +2339,7 @@ int wpas_p2p_init(struct wpa_global *global, struct wpa_supplicant *wpa_s)
 	p2p.go_neg_completed = wpas_go_neg_completed;
 	p2p.go_neg_req_rx = wpas_go_neg_req_rx;
 	p2p.dev_found = wpas_dev_found;
+	p2p.dev_lost = wpas_dev_lost;
 	p2p.start_listen = wpas_start_listen;
 	p2p.stop_listen = wpas_stop_listen;
 	p2p.send_probe_resp = wpas_send_probe_resp;