[PATCHv3] Dbus: Created New event DeviceFoundProperties to provide peer properties of Discovered peers.

[Nishant Chaprana]

This event will be sending peer properties to applications for Discovered peers.
Signature of this event will be "oa{sv}".
This event is required because current event DeviceFound provides only peer object path.
If there are many peers in range then there will be many DeviceFound event and
for each DeviceFOund applicaions would be required to GetAll peer properties
many time will be creating extra load over applicaiton as well as over wpa_supplicant.
So it will be better to send peer properties in a event using which applications
can extract found peer information.

The issue will not be over CTRL interface because P2P-DEVICE-FOUND event sends peer info in it.
But over Dbus interface DeviceFound provides only peer object.

Signed-off-by: Nishant Chaprana <n.chaprana at samsung.com>
---
 doc/dbus.doxygen               | 13 +++++++++++++
 wpa_supplicant/dbus/dbus_new.c | 25 ++++++++++++++++++++-----
 2 files changed, 33 insertions(+), 5 deletions(-)

diff --git a/doc/dbus.doxygen b/doc/dbus.doxygen
index 28ee371..b95b814 100644
--- a/doc/dbus.doxygen
+++ b/doc/dbus.doxygen
@@ -1630,6 +1630,19 @@ Interface for performing P2P (Wi-Fi Peer-to-Peer) P2P Device operations.
   <li>
     <h3>DeviceFound ( o : path )</h3>
   </li>
+  <li>
+    <h3>DeviceFoundProperties ( o : path, a{sv} : properties )</h3>
+    <p>A new peer device has been found.</p>
+    <h4>Arguments</h4>
+    <dl>
+      <dt>o : path</dt>
+      <dd>A D-Bus path to an object representing the found peer device.</dd>
+    </dl>
+    <dl>
+      <dt>a{sv} : properties</dt>
+      <dd>A dictionary containing properties of found peer device.</dd>
+    </dl>
+  </li>
 
   <li>
     <h3>DeviceLost ( o : path )</h3>
diff --git a/wpa_supplicant/dbus/dbus_new.c b/wpa_supplicant/dbus/dbus_new.c
index 0263b2c..a60492d 100644
--- a/wpa_supplicant/dbus/dbus_new.c
+++ b/wpa_supplicant/dbus/dbus_new.c
@@ -3352,6 +3352,13 @@ static const struct wpa_dbus_signal_desc wpas_dbus_interface_signals[] = {
 		  END_ARGS
 	  }
 	},
+	{ "DeviceFoundProperties", WPAS_DBUS_NEW_IFACE_P2PDEVICE,
+	  {
+		  { "path", "o", ARG_OUT },
+		  { "properties", "a{sv}", ARG_OUT },
+		  END_ARGS
+	  }
+	},
 	{ "DeviceLost", WPAS_DBUS_NEW_IFACE_P2PDEVICE,
 	  {
 		  { "path", "o", ARG_OUT },
@@ -3800,12 +3807,13 @@ static const struct wpa_dbus_signal_desc wpas_dbus_p2p_peer_signals[] = {
  *	In case of peer objects, it would be emitted by either
  *	the "interface object" or by "peer objects"
  * @sig_name: signal name - DeviceFound
+ * @properties: determines if add second argument with object properties
  *
- * Notify listeners about event related with newly found p2p peer device
+ * Notify listeners about event related with p2p peer device
  */
 static void wpas_dbus_signal_peer(struct wpa_supplicant *wpa_s,
 				  const u8 *dev_addr, const char *interface,
-				  const char *sig_name)
+				  const char *sig_name, int properties)
 {
 	struct wpas_dbus_priv *iface;
 	DBusMessage *msg;
@@ -3833,7 +3841,10 @@ static void wpas_dbus_signal_peer(struct wpa_supplicant *wpa_s,
 	dbus_message_iter_init_append(msg, &iter);
 	path = peer_obj_path;
 	if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_OBJECT_PATH,
-					    &path))
+					    &path) ||
+	    (properties && !wpa_dbus_get_object_properties(
+		     iface, peer_obj_path, WPAS_DBUS_NEW_IFACE_P2P_PEER,
+		     &iter)))
 		wpa_printf(MSG_ERROR, "dbus: Failed to construct signal");
 	else
 		dbus_connection_send(iface->con, msg, NULL);
@@ -3854,7 +3865,11 @@ void wpas_dbus_signal_peer_device_found(struct wpa_supplicant *wpa_s,
 {
 	wpas_dbus_signal_peer(wpa_s, dev_addr,
 			      WPAS_DBUS_NEW_IFACE_P2PDEVICE,
-			      "DeviceFound");
+			      "DeviceFound", FALSE);
+
+	wpas_dbus_signal_peer(wpa_s, dev_addr,
+			      WPAS_DBUS_NEW_IFACE_P2PDEVICE,
+			      "DeviceFoundProperties", TRUE);
 }
 
 /**
@@ -3869,7 +3884,7 @@ void wpas_dbus_signal_peer_device_lost(struct wpa_supplicant *wpa_s,
 {
 	wpas_dbus_signal_peer(wpa_s, dev_addr,
 			      WPAS_DBUS_NEW_IFACE_P2PDEVICE,
-			      "DeviceLost");
+			      "DeviceLost", FALSE);
 }
 
 /**
-- 
1.9.1