Filter
Top Products
SIOCSMACSPEED and SIOCIFSETCHAR ioctl commands perform some of
the same tasks.)
case SIOCSMACSPEED: 1
bcopy(ifr->ifr_data, (u_char *)&speed, sizeof(u_short));
if ((speed != 0) && (speed != 10)) {
2
status = EINVAL;
break;
}
break;
1 Determines whether the cmd argument is SIOCSMACSPEED.
2 If the LAN speed passed is anything other than 10 (0 means no change),
fails the request. (The if_el device can only operate at 10 Mb per
second.)
12.15 Resetting the Device (SIOCIFRESET ioctl Command)
The following code shows how the el_ioctl( ) routine implements
the SIOCIFRESET ioctl command to reset the device. Support for the
SIOCIFRESET command is optional. You can choose whether or not your
driver supports it.
case SIOCIFRESET:
1
el_reset_locked(sc, ifp, unit); 2
break;
1 Determines whether the cmd argument is SIOCIFRESET.
2 Calls the el_reset_locked( ) routine to restart the network interface.
12.16 Setting Device Characteristics (SIOCIFSETCHAR
ioctl Command)
The following code shows how the el_ioctl( ) routine implements the
SIOCIFSETCHAR ioctl command to set characteristics:
case SIOCIFSETCHAR:
1
need_reset = 0; 2
if ((ifc->ifc_media_speed != -1) && (ifc->ifc_media_speed != 10)) { 3
status = EINVAL;
break;
}
if ((ifc->ifc_auto_sense == LAN_AUTOSENSE_ENABLE) &&
4
(ifc->ifc_media_type != -1)) {
status = EINVAL;
break;
}
Implementing the ioctl Section 12–11