TCP_MD5SIG
if (setsockopt(s, IPPROTO_TCP, TCP_MD5SIG,
case TCP_MD5SIG: return ("TCP_MD5SIG");
if (getsockopt(conn, IPPROTO_TCP, TCP_MD5SIG, &opt, &optlen) != 0) {
if (setsockopt(src, IPPROTO_TCP, TCP_MD5SIG, &x, sizeof (x)) != 0) {
if (setsockopt(dst, IPPROTO_TCP, TCP_MD5SIG, &x, sizeof (x)) != 0) {
{ TCP_MD5SIG, IPPROTO_TCP, OA_RW, OA_RW, OP_NP, 0, sizeof (int), 0 },
case TCP_MD5SIG:
case TCP_MD5SIG: