Fixed LWIPStack socket_sendto member to fail if interface IP4/6 versi…

…on differ from destination adress IP version

features/lwipstack/LWIPStack.cpp

@@ -488,12 +488,18 @@ nsapi_size_or_error_t LWIP::socket_sendto(nsapi_socket_t handle, const SocketAdd
 {
  struct mbed_lwip_socket *s = (struct mbed_lwip_socket *)handle;
  ip_addr_t ip_addr;
+ nsapi_addr_t interface_addr;
 
  nsapi_addr_t addr = address.get_addr();
  if (!convert_mbed_addr_to_lwip(&ip_addr, &addr)) {
  return NSAPI_ERROR_PARAMETER;
  }
 
+ convert_lwip_addr_to_mbed(&interface_addr, get_ip_addr(true, &default_interface->netif));
+ if (addr.version != interface_addr.version) {
+ return NSAPI_ERROR_PARAMETER;
+ }
+
  struct netbuf *buf = netbuf_new();
 
  err_t err = netbuf_ref(buf, data, (u16_t)size);