Multicast/Group Address

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A multicast/group address table is used by the LANE device driver to store address filters for incoming multicast/group packets. If the LANE device driver is unable to allocate kernel memory when attempting to add a multicast/group address to the table, the address is not added and ENOMEM is returned.

If the LANE device driver is successful in adding a multicast/group address, the NDD_ALTADDRS flag in the ndd_flags field is set. Additionally for Token Ring, the TOK_RECEIVE_GROUP flag is set, and the first 2 bytes of the group address are forced to be C0.00 (hex).