BSP Developer's Guide

VxWorks 5.5
BSP Developer’s Guide
Table H-1
Required Driver Entry Points (Continued)
Routine
endMCastAddrDel( )
endMCastAddrGet( )
endPollSend( )
endPollReceive( )
endAddressForm( )
endPacketDataGet( )
endPacketAddrGet( )
Purpose
Delete an address from the device’s multicast address list.
Get the list of multicast addresses maintained for this device.
Do a polling send.
Do a polling receive.
Add the appropriate link-level information into a mBlk in
preparation for transmission.
Extract packet data (omitting link-level information) from one
mBlk and write it to another.
Extract address information (omitting packet data) from one
mBlk and write out each source and destination address to its
own mBlk. For an Ethernet packet, this requires two output
mBlks. However, for some non-Ethernet packets, this could
require as many as four output mBlks because the local source
and destination addresses can differ from the ultimate source and
destination addresses.
! WARNING: If you are porting a driver from the BSD 4.3 model, you might be
tempted to use the existing xxIoctl( ) entry point as your endIoctl( ) entry point,
skipping the creation of separate entry points for the various MCastAddr entry
points. Do not do this. Your driver must implement all entry points shown in
Table H-1.
Loading the Device: endLoad( )
Your endLoad( ) entry point serves the same function that the attach( ) entry points
do under the 4.3 BSD based system. endLoad( ) is the initial entry point into every
network interface driver. The tUserRoot task specifies your endLoad( ) as an input
parameter when it calls muxDevLoad( ) to load your driver.
Your endLoad( ) must take the following form:
290