yanger: Allow to read back SSIDs encoded with utf-8

src/statd/python/yanger/__main__.py

@@ -97,7 +97,7 @@ def main():
         common.LOG.warning("Unsupported model %s", args.model)
         sys.exit(1)
 
-    print(json.dumps(yang_data, indent=2))
+    print(json.dumps(yang_data, indent=2, ensure_ascii=False))
 
 
 if __name__ == "__main__":

src/statd/python/yanger/ietf_interfaces/wifi.py

@@ -122,9 +122,15 @@ def parse_wpa_scan_result(scan_output):
 
                 flags = parts[3].strip()
                 ssid = parts[4].strip() if len(parts) > 4 else ""
+                try:
+                    ssid = ssid.encode().decode('unicode_escape').encode('latin-1').decode('utf-8')
+                except (UnicodeDecodeError, UnicodeEncodeError):
+                    pass
+                # Strip control chars (terminal injection risk from rogue APs)
+                ssid = ''.join(c for c in ssid if c.isprintable())
 
                 # Skip hidden SSIDs (empty or null-filled)
-                if not ssid or ssid.isspace() or '\\x00' in ssid:
+                if not ssid or ssid.isspace():
                     continue
 
                 encryption = extract_encryption(flags)