sockargs
error = sockargs(&nam, SCARG(uap, name), SCARG(uap, namelen),
error = sockargs(&nam, SCARG(uap, name), SCARG(uap, namelen),
error = sockargs(&to, mp->msg_name, mp->msg_namelen,
error = sockargs(&control, mp->msg_control,
error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen,
error = sockargs(&nam, args->addr, args->addrlen, MT_SONAME);
int sockargs(struct mbuf **, const void *, size_t, int);