MDI

The SCO MAC Driver Interface is a simple, STREAMS-based MAC provider interface used to implement drivers for network adapter cards for SVR5 and SCO OpenServer 5 systems.

MDI version support

O/S release	Supported versions
SCO OpenServer 5 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
SVR5, Release 7 UnixWare 7.0.1	mdi:2 with ddi:7,7mp,7.1,7.1mp,7.2,7.2mp,8,8mp
SVR5, 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 SVR5 and SCO OpenServer 5 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 SVR5 drivers and Section D3oddi manual pages for SCO OpenServer 5 MDI drivers.

• The kernel structures in Section D4mdi manual pages. These supplement those in Section D4str manual pages and Section D4 manual pages for SVR5 drivers and Section D4oddi manual pages for SCO OpenServer 5 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 5 used LLI, a precursor of MDI, for network adapter drivers. SCO SVR5 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 SVR5 only) See ``ISDN''.

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