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State of the Route Constants
| Constant | Value | Description |
|---|---|---|
| RTM_ROUTE_STATE_CREATED | 0 | Route has been created. |
| RTM_ROUTE_STATE_DELETING | 1 | Route is being deleted. |
| RTM_ROUTE_STATE_DELETED | 2 | Route has been deleted. |
Route Update Flags
| Constant | Value | Description |
|---|---|---|
| RTM_ROUTE_CHANGE_FIRST | 0x01 | Indicates that the routing table manager should not check the Neighbour member of the RTM_ROUTE_INFO structure when determining when two routes are equal. |
| RTM_ROUTE_CHANGE_NEW | 0x02 | Returned by the routing table manager to indicate a new route was created. |
| RTM_ROUTE_CHANGE_BEST | 0x00010000 | Returned by the routing table manager to indicate that the route that was added or updated was the best route, or that because of the change, a new route became the best route. |
Unicast Flags
| Constant | Value | Description |
|---|---|---|
| RTM_ROUTE_FLAGS_LOCAL | 0x0010 | Indicates a destination is on a directly reachable network. |
| RTM_ROUTE_FLAGS_REMOTE | 0x0020 | Indicates that the destination is not on a directly reachable network. |
| RTM_ROUTE_FLAGS_MYSELF | 0x0040 | Indicates the destination is one of the router's addresses. |
Broadcast and Multicast Flags
| Constant | Value | Description |
|---|---|---|
| RTM_ROUTE_FLAGS_MCAST | 0x0100 | Indicates that this route is a route to a multicast address. |
| RTM_ROUTE_FLAGS_LOCAL_MCAST | 0x0200 | Indicates that this route is a route to a local multicast address. |
| RTM_ROUTE_FLAGS_LIMITED_BC | 0x0400 | Indicates that this route is a limited broadcast address. Packets to this destination should not be forwarded. |
| RTM_ROUTE_FLAGS_ZEROS_NETBC | 0x1000 | Indicates that the destination matches an interface's all-zeros broadcast address. If broadcast forwarding is enabled, packets should be received and resent out all appropriate interfaces. |
| RTM_ROUTE_FLAGS_ZEROS_SUBNETBC | 0x2000 | Indicates that the destination matches an interface's all-zeros subnet broadcast address. If subnet broadcast forwarding is enabled, packets should be received and resent out all appropriate interfaces. |
| RTM_ROUTE_FLAGS_ONES_NETBC | 0x4000 | Indicates that the destination matches an interface's all-ones broadcast address. If broadcast forwarding is enabled, packets should be received and resent out all appropriate interfaces. |
| RTM_ROUTE_FLAGS_ONES_SUBNETBC | 0x8000 | Indicates that the destination matches an interface's all-ones subnet broadcast address. If subnet broadcast forwarding is enabled, packets should be received and resent out all appropriate interfaces. |
Grouping of Flags
| Group | Members | Description |
|---|---|---|
| RTM_ROUTE_FLAGS_FORWARDING | RTM_ROUTE_FLAGS_MARTIAN, RTM_ROUTE_FLAGS_BLACKHOLE, RTM_ROUTE_FLAGS_DISCARD, RTM_ROUTE_FLAGS_INACTIVE | Specifies any forwarding flags. |
| RTM_ROUTE_FLAGS_ANY_UNICAST | RTM_ROUTE_FLAGS_LOCAL, RTM_ROUTE_FLAGS_REMOTE, RTM_ROUTE_FLAGS_MYSELF | Specifies any unicast flags. |
| RTM_ROUTE_FLAGS_ANY_MCAST | RTM_ROUTE_FLAGS_MCAST, RTM_ROUTE_FLAGS_LOCAL_MCAST | Specifies any unicast flags. |
| RTM_ROUTE_FLAGS_SUBNET_BCAST | RTM_ROUTE_FLAGS_ONES_SUBNET_BC, RTM_ROUTE_FLAGS_ZEROS_SUBNETBC | Specifies any subnet broadcast flags. |
| RTM_ROUTE_FLAGS_NET_BCAST | RTM_ROUTE_FLAGS_ONES_NETBC, RTM_ROUTE_FLAGS_ZEROS_NETBC | Specifies any net-wide broadcast flags. |
| RTM_ROUTE_FLAGS_ANY_BCAST | RTM_ROUTE_FLAGS_LIMITED_BC, RTM_ROUTE_FLAGS_ONES_NETBC, RTM_ROUTE_FLAGS_ONES_SUBNET_BC, RTM_ROUTE_FLAGS_ZEROS_NETBC, RTM_ROUTE_FLAGS_ZEROS_SUBNETBC | Specifies any of the subnet or net-wide broadcast flags. |