MDI

The SCO MAC Driver Interface is a simple, STREAMS-based MAC provider interface used to implement drivers for network adapter cards for UnixWare 7 and SCO OpenServer systems.

MDI version support

O/S release	Supported versions
SCO OpenServer Release 5.0.0	mdi:1 with oddi:1,2,2mp,3,3mp
SCO OpenServer Release 5.0.4	mdi:1 with oddi:1,2,2mp,3,3mp,4,4mp
SCO OpenServer Release 5.0.5	mdi:1 with oddi:1,2,2mp,3,3mp,4,4mp,5,5mp
UnixWare 7, Release 7 UnixWare 7.0.1	mdi:2 with ddi:7,7mp,7.1,7.1mp,7.2,7.2mp,8,8mp
UnixWare 7, Release 7.1	mdi:2 with ddi:7,7mp,7.1,7.1mp,7.2,7.2mp,8,8mp mdi:2.1 with ddi:8,8mp

 O/S release                 |  Supported versions
 SCO OpenServer Release 5.0.0|  mdi:1 with oddi:1,2,2mp,3,3mp
 SCO OpenServer Release 5.0.4|  mdi:1 with oddi:1,2,2mp,3,3mp,4,4mp
 SCO OpenServer Release 5.0.5|  mdi:1 with oddi:1,2,2mp,3,3mp,4,4mp,5,5mp
 ----------------------------|------------------------------------------------
 UnixWare 7, Release 7       |  mdi:2 with ddi:7,7mp,7.1,7.1mp,7.2,7.2mp,8,8mp
 UnixWare 7.0.1              |
 UnixWare 7, Release 7.1     |  mdi:2 with ddi:7,7mp,7.1,7.1mp,7.2,7.2mp,8,8mp
                             |  mdi:2.1 with ddi:8,8mp

The MDI interface for UnixWare 7 and SCO OpenServer is documented in the following:

• The driver entry point routines in Section D2mdi manual pages.

• The kernel functions in Section D3mdi manual pages. These functions supplement those in Section D3str manual pages and Section D3 manual pages for UnixWare 7 drivers and Section D3oddi manual pages for SCO OpenServer MDI drivers.

• The kernel structures in Section D4mdi manual pages. These supplement those in Section D4str manual pages and Section D4 manual pages for UnixWare 7 drivers and Section D4oddi manual pages for SCO OpenServer MDI drivers.

• ``MDI primitives'' in Section D7mdi manual pages

• STREAMS message types in Section D7str manual pages

• ``MDI ioctls'' in Section 7mdi manual pages.

• Developing MDI network adapter drivers

• ``MDI data''

• ``MAC addresses''

Earlier versions of SCO OpenServer used LLI, a precursor of MDI, for network adapter drivers. SCO UnixWare 1 and 2 used DLPI for network adapter drivers. See ``Porting network adapter drivers to MDI 2'' for information about porting drivers from either of these interfaces.

The SCO MDI is currently defined for the following media types:

• Ethernet-II, IEEE 802.3 CSMA/CD networks

• 100BaseTX

• GigabitTX

• 10/100 VGAAnyLAN

• IEEE 802.5 Token Passing Ring networks

• FDDI networks

• ISDN (MDI version 2 on UnixWare 7 only) See ``ISDN''.

The MDI may be extended in the future to support other network media.