Dear All,
I am writing the IOCTLs in MiniportQueryInformation dispather that will return the number of multicast and broadcast bytes transmitted and received. Can anyone of you tell me if window provide some macro, function or any other information by which I can check in the packet information if that packet is meant for broadcast or multicast or is there any other way to do so?
thanks in advance,
Abhishek Rastogi
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abhishek rastogi wrote:
Dear All,
I am writing the IOCTLs in MiniportQueryInformation dispather that
will return the number of multicast and broadcast bytes transmitted
and received. Can anyone of you tell me if window provide some macro,
function or any other information by which I can check in the packet
information if that packet is meant for broadcast or multicast or is
there any other way to do so?
For IP multicast addresses check RFC1112. Is has been a long time so I
don’t recall the details but basically they use part of the IP multicast
address (I think the 32 least significant bits) to manufacture the
Ethernet address. For Tokenring they use one of the Tokenring group
addresses. As there are only 32 off those they have assigned one off
them as the IP Multicast addresses.
Please check on this, but hopefully it is a useful pointer.,
Jos
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Surely. It is the Ethernet address.
Macros are ETH_IS_MULTICAST() and ETH_IS_BROADCAST() in EFilter.h
Max
----- Original Message -----
From: abhishek rastogi
To: NT Developers Interest List
Sent: Sunday, July 29, 2001 4:45 PM
Subject: [ntdev] NDIS Miniport driver and multicast ,broadcast address checking
Dear All,
I am writing the IOCTLs in MiniportQueryInformation dispather that will return the number of multicast and broadcast bytes transmitted and received. Can anyone of you tell me if window provide some macro, function or any other information by which I can check in the packet information if that packet is meant for broadcast or multicast or is there any other way to do so?
thanks in advance,
Abhishek Rastogi
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