CTL_DESCRIBE
if (name[0] == CTL_DESCRIBE) {
name[namelen - 1] = CTL_DESCRIBE;
name[namelen - 1] = CTL_DESCRIBE;
name[namelen] = CTL_DESCRIBE;
if (namelen != 1 || name[0] != CTL_DESCRIBE)
case CTL_DESCRIBE:
if (namelen > 0 && name[0] == CTL_DESCRIBE)
mib[miblen] = CTL_DESCRIBE;