fix wifi client not connected

Author: previ

wifi.py

@@ -91,7 +91,7 @@ def get_ipaddr(cls, ifname):
         return socket.inet_ntoa(fcntl.ioctl(
             s.fileno(),
             0x8915,  # SIOCGIFADDR
-            struct.pack('256s', ifname[:15])
+            struct.pack('256s', ifname.encode('utf-8')[:15])
         )[20:24])
 
     @classmethod
@@ -154,6 +154,9 @@ def start_as_client(cls):
             out = os.system("wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf > /dev/null 2>&1")
             out += os.system("dhclient -1 wlan0")
             print(out)
+            ipaddr = cls.get_ipaddr("wlan0")
+            if ipaddr is None or "169.254" in ipaddr:
+                raise Exception()
             try:
                 cls.register_ipaddr(cls.get_macaddr("wlan0"), cls.get_config().get('bot_name', 'CoderBot'), cls.get_ipaddr("wlan0"), "roberto.previtera@gmail.com")
                 print("registered bot, ip: " + str(cls.get_ipaddr("wlan0") + " name: " + cls.get_config().get('bot_name', 'CoderBot')))