test_connect
if (test_connect(sun, slen + 2, &sun2) != t[i].r) {
if (test_connect(sun, slen + 3, &sun2) != t[i].r) {
test_connect(sun, sizeof(*sun), &sun2) != t[i].r) {
if (test_connect(sun, slen + 2, &sun2) != t[i].r) {