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Change Notification Flags

Constant Value Description
RTM_NUM_CHANGE_TYPES 3 Specifies the number of change types that are currently used by the routing table manager.
RTM_CHANGE_TYPE_ALL 0x0001 Notifies the client of any change to a destination.
RTM_CHANGE_TYPE_BEST 0x0002 Notifies the client of changes to the best route, or when the best route changes.
RTM_CHANGE_TYPE_FORWARDING 0x0004 Notifies the client of any best route changes that affect forwarding (such as next hop changes).
RTM_NOTIFY_ONLY_MARKED_DESTS 0x00010000 Notifies the client of changes to destinations that the client has marked. If this flag is not specified, change notification messages for all destinations are sent.