class FilterTable specialized BGPRouteTable implementing a filter bank to modify or drop routes. More...

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Public Methods

•  FilterTable (string tablename, Safi safi, BGPRouteTable<A> *parent, NextHopResolver<A>& next_hop_resolver)
•  ~FilterTable ()
• void  reconfigure_filter ()
• int  add_route (const InternalMessage<A> &rtmsg, BGPRouteTable<A> *caller)
• int  replace_route (const InternalMessage<A> &old_rtmsg, const InternalMessage<A> &new_rtmsg, BGPRouteTable<A> *caller)
• int  delete_route (const InternalMessage<A> &rtmsg, BGPRouteTable<A> *caller)
• int  route_dump (const InternalMessage<A> &rtmsg, BGPRouteTable<A> *caller, const PeerHandler *dump_peer)
• int  push (BGPRouteTable<A> *caller)
• const SubnetRoute<A> * lookup_route (const IPNet<A> &net, uint32_t& genid) const
• void  route_used (const SubnetRoute<A>* route, bool in_use)
• RouteTableType  type () const
• string  str () const
• bool  get_next_message (BGPRouteTable<A> *next_table)
• int  add_aggregation_filter (bool is_ibgp)
• int  add_simple_AS_filter (const AsNum &asn)
• int  add_route_reflector_input_filter (IPv4 bgp_id, IPv4 cluster_id)
• int  add_AS_prepend_filter (const AsNum &asn, bool is_confederation_peer)
• int  add_nexthop_rewrite_filter (const A& nexthop, bool directly_connected, const IPNet<A> &subnet)
• int  add_nexthop_peer_check_filter (const A& nexthop, const A& peer_address)
• int  add_ibgp_loop_filter ()
• int  add_route_reflector_ibgp_loop_filter (bool client, IPv4 bgp_id, IPv4 cluster_id)
• int  add_route_reflector_purge_filter ()
• int  add_localpref_insertion_filter (uint32_t default_local_pref)
• int  add_localpref_removal_filter ()
• int  add_med_insertion_filter ()
• int  add_med_removal_filter ()
• int  add_known_community_filter (PeerType peer_type)
• int  add_unknown_filter ()
• int  add_originate_route_filter (const AsNum &asn, PeerType peer_type)
• void  do_versioning ()

Detailed Description

The XORP BGP is internally implemented as a set of pipelines consisting of a series of BGPRouteTables. Each pipeline receives routes from a BGP peer, stores them, and applies filters to them to modify the routes. Then the pipelines converge on a single decision process, which decides which route wins amongst possible alternative routes. After decision, the winning routes fanout again along a set of pipelines, again being filtered, before being transmitted to peers.

FilterTable is a BGPRouteTable that can hold banks of route filters. Normally FilterTable propagates add_route, delete_route and the response to lookup_route directly through from the parent to the child. A route filter can cause these to not be be propagated, or can modify the attributes of the route in the message.

Typically there are two FilterTables for each peer, one in the input branch from that peer, and one in the output branch to that peer. A FilterTable does not store the routes it modifies. Thus is is normally followed by a CacheTable which stores those routes for later use.

Reimplemented from BGPRouteTable.

Reimplemented from BGPRouteTable.

Reimplemented from BGPRouteTable.

Reimplemented from BGPRouteTable.

Reimplemented from BGPRouteTable.

[const]

Reimplemented from BGPRouteTable.

Reimplemented from BGPRouteTable.

[const]

Reimplemented from BGPRouteTable.

[const]

Reimplemented from BGPRouteTable.

Reimplemented from BGPRouteTable.