res_nsearch
int res_nsearch(res_state, const char *, int, int, u_char *, int);
n = res_nsearch(statp, name, C_IN, type, buf->buf, sizeof(buf->buf));
anslen = res_nsearch(statp, qbuf, C_IN, T_PTR, (u_char *)buf,
return (res_nsearch(&_res, name, class, type, answer, anslen));