mesh: Implement mesh scanning

When mesh is configured in, include the wildcard mesh id so that mesh
networks are returned.

Signed-off-by: Javier Lopez <jlopex@gmail.com>
Signed-off-by: Jason Abele <jason.abele@gmail.com>

wpa_supplicant/mesh.c

@@ -257,6 +257,19 @@ void wpa_mesh_notify_peer(struct wpa_supplicant *wpa_s, const u8 *addr,
 }
 
 
+void wpa_supplicant_mesh_add_scan_ie(struct wpa_supplicant *wpa_s,
+				     struct wpabuf **extra_ie)
+{
+	/* EID + 0-length (wildcard) mesh-id */
+	size_t ielen = 2;
+
+	if (wpabuf_resize(extra_ie, ielen) == 0) {
+		wpabuf_put_u8(*extra_ie, WLAN_EID_MESH_ID);
+		wpabuf_put_u8(*extra_ie, 0);
+	}
+}
+
+
 int wpa_supplicant_join_mesh(struct wpa_supplicant *wpa_s,
 			     struct wpa_ssid *ssid)
 {

wpa_supplicant/mesh.h

@@ -19,6 +19,8 @@ void wpa_supplicant_mesh_iface_deinit(struct wpa_supplicant *wpa_s,
 
 void wpa_mesh_notify_peer(struct wpa_supplicant *wpa_s, const u8 *addr,
 			  const u8 *ies, size_t ie_len);
+void wpa_supplicant_mesh_add_scan_ie(struct wpa_supplicant *wpa_s,
+				     struct wpabuf **extra_ie);
 
 #else /* CONFIG_MESH */
 
@@ -28,6 +30,11 @@ static inline void wpa_mesh_notify_peer(struct wpa_supplicant *wpa_s,
 {
 }
 
+static inline void wpa_supplicant_mesh_add_scan_ie(struct wpa_supplicant *wpa_s,
+						   struct wpabuf **extra_ie)
+{
+}
+
 #endif /* CONFIG_MESH */
 
 #endif /* MESH_H */

wpa_supplicant/scan.c

@@ -22,6 +22,7 @@
 #include "notify.h"
 #include "bss.h"
 #include "scan.h"
+#include "mesh.h"
 
 
 static void wpa_supplicant_gen_assoc_event(struct wpa_supplicant *wpa_s)
@@ -460,6 +461,8 @@ static struct wpabuf * wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s)
 	}
 #endif /* CONFIG_P2P */
 
+	wpa_supplicant_mesh_add_scan_ie(wpa_s, &extra_ie);
+
 #endif /* CONFIG_WPS */
 
 #ifdef CONFIG_HS20