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RegisterTable is a RouteTable that is plumbed into the RIB after all the MergedTable and ExtIntTable instances. Thus it seems all winning route updates that will be propagated to the forwarding engine.
It's purpose is to track route changes that affect specific addresses in which routing protocols have expressed an interest, and to notify these routing protocols of any changes.
| RegisterTable (const string& tablename, RegisterServer& register_server,
bool multicast)
| RegisterTable |
RegisterTable constructor
Unlike other RouteTable constructors, this doesn't plumb itself into the table graph because it is set up before any origin tables, so it doesn't yet have a parent. RIB::initialize_register will do the plumbing later on.
Parameters:
| tablename | human-readable name for this table for debugging purposes. |
| register_server | a reference to the RIB's RegisterServer instance. The RegisterServer handles IPC requests and responses related to registration of interest. |
| multicast | indicates whether or not this RegisterTable is in a multicast RIB. The information is needed when notifying a routing protocol of a change, because the same route might be in both unicast and multicast RIBs. |
| ~RegisterTable ()
| ~RegisterTable |
| int add_route (const IPRouteEntry<A>& route, RouteTable<A>* caller)
| add_route |
Add a new route to the RIB. This will be propagated downstream to the next table, but may also cause the RegisterTable to invalidate a RouteRegister because the new route overlaps an existing registration.
Parameters:
| route | the new route. |
| caller | this must be this table's parent table. |
Returns: XORP_OK on success, otherwise XORP_ERROR.
Reimplemented from RouteTable.
| int delete_route (const IPRouteEntry<A>* route, RouteTable<A>* caller)
| delete_route |
Delete a route from the RIB. This will be propagated downstream to the next table, but may also cause the RegisterTable to invalidate a RouteRegister referencing this route.
Parameters:
| route | the route being deleted. |
| caller | this must be this table's parent table. |
Returns: XORP_OK on success, otherwise XORP_ERROR.
Reimplemented from RouteTable.
| const IPRouteEntry<A>* lookup_route (const IPNet<A>& net)
| lookup_route |
[const]
Lookup a route in the RIB. This request will be propagated to the parent table unchanged.
Reimplemented from RouteTable.
| const IPRouteEntry<A>* lookup_route (const A& addr)
| lookup_route |
[const]
Lookup a route in the RIB. This request will be propagated to the parent table unchanged.
Reimplemented from RouteTable.
| RouteRange<A>* lookup_route_range (const A& addr)
| lookup_route_range |
[const]
Lookup a route_range in the RIB. This request will be propagated to the parent table unchanged. It is not expected this will be called, but not prohibited.
Reimplemented from RouteTable.
| void replumb (RouteTable<A>* old_parent, RouteTable<A>* new_parent)
| replumb |
Replumb to replace the old parent of this table with a new parent.
Parameters:
| old_parent | the parent RouteTable being replaced (must be the same as the existing parent). |
| new_parent | the new parent RouteTable. |
Reimplemented from RouteTable.
| RouteTable<A>* parent ()
| parent |
Returns: the parent RouteTable of this RegisterTable.
Reimplemented from RouteTable.
| string str ()
| str |
[const]
Returns: this RegisterTable as a string for debugging purposes.
Reimplemented from RouteTable.
| void print ()
|
Print the contents of this RegisterTable as a string for debugging purposes.
| RouteRegister<A>* register_route_range (const A& addr,
const string& module)
| register_route_range |
register_route_range is called to register interest in routing changes that affect a specific IP address.
Parameters:
| addr | the IP address of interest. |
| module | the XRL target name of the module (typically a routing protocol) that is interested in being notified about changes to this address. |
Returns: a RouteRegister instance detailing the route that is currently being used to route packets to this address and the subset of this route (including the address of interest) for which this answer also applies.
| int deregister_route_range (const IPNet<A>& subnet, const string& module)
| deregister_route_range |
deregister_route_range is called to de-register interest in routing changes following a prior call to register_route_range.
Parameters:
| valid_subnet | the subnet of validity from the RouteRegister returned by a prior call to register_route_range. |
| module | the XRL target name of the module that is no longer interested in being notified. |
Returns: XORP_OK on success, otherwise XORP_ERROR.
| TableType type ()
| type |
[const]
Returns: the table type (TableType).
Reimplemented from RouteTable.
| void flush ()
| flush |
Cause the register server to push out queued changes to the routing protocols.
Reimplemented from RouteTable.
