unicast, multicast, broadcast packet

StackOverflow https://stackoverflow.com/questions/19085857

  •  29-06-2022
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Question

I am developing a NDIS driver. NDIS sends packet to miniport. How will I know that the packet comes from NDIS is unicast, multicast or broadcast packet.How to find out a packet is unicast, multicast or broadcast..

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Solution

If you are writing an Ethernet driver (or at least, your media is similar to IEEE 802's MAC) you can use the ETH_IS_BROADCAST and ETH_IS_MULTICAST macros from ndis.h. Anything not broadcast or multicast is unicast.

For a code sample, see NICGetFrameTypeFromDestination from the netvmini sample.

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