Take a look at the sys/io-net.h file and you will see an
_io_net_msg_mcast structure. This is what is passed to the driver from
io-net. The driver doesn't have to send out any message.

ion->tx_done is called when a packet has been transmitted.
ion->reg_tx_done is called to register a driver with io-net.


-----Original Message-----
From: Daniel Rodrick [mailto:daniel.rodrick@gmail.com] 
Sent: Friday, July 11, 2008 12:25 AM
To: drivers-networking
Subject: Network driver questions


Hello List,

Can somebody please tell me what is a driver expected to do in case it
receives a DCMD_IO_NET_CHANGE_MCAST devctl from io-net? What are the
parameters passed to the network driver? Does it need to send something
on the wire?

Secondly, what is the difference between the following two methods:

ion->tx_done
ion->reg_tx_done

TIA,

Dan

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Networking Drivers
http://community.qnx.com/sf/go/post10378