V_udp4_tun_socket
if (V_udp4_tun_socket != NULL) {
soclose(V_udp4_tun_socket);
V_udp4_tun_socket = NULL;
if (V_udp4_tun_socket != NULL) {
if ((ret = socreate(PF_INET, &V_udp4_tun_socket,
if ((ret = udp_set_kernel_tunneling(V_udp4_tun_socket,
if ((ret = sobind(V_udp4_tun_socket,