in_nam2sin
int in_nam2sin(const struct mbuf *, struct sockaddr_in **);
if ((error = in_nam2sin(nam, &sin)))
if ((error = in_nam2sin(nam, &sin)))
if ((error = in_nam2sin(nam, &sin)))
if (in_nam2sin(nam, &sin4) == 0)
if ((error = in_nam2sin(nam, &addr)))
if ((error = in_nam2sin(nam, &addr)))
if ((error = in_nam2sin(nam, &addr)))
if ((error = in_nam2sin(nam, &sin)))
if ((error = in_nam2sin(addr, &sin)))
in_nam2sin(nam, &sin) != 0 ||