/*
* Copyright (c) 2016 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* FIB attached export
*
* what's it all about?
* say one does this:
* set int ip table Gig0 2
* set int ip addr Gig0 10.0.0.1/24
* Ggi0 is in table 2 with a connected address.
* Now we add a routing matching said connected in a different table
* ip route add table 3 10.0.0.0/24 via Gig0
* How do we expect traffic in table 3 to be forwarded? Clearly out of
* Ggi0. It's an attached route, hence we are saying that we can ARP for
* hosts in the attached subnet. and we can. but any ARP entries we send
* we be received on Gig0, but since Gig0 is in table 2, it will install
* the adj-fins in table 2. So traffic in table 3 will never hit an adj-fib
* and hence always the glean, and so thus be effectively dropped.
* How do we fix this? Attached Export !! All more specfiic entries in table 2
* that track and are covered by the connected are automatically exported into
* table 3. Now table 3 also has adj-fibs (and the local) so traffic to hosts
* is restored.
*/
#ifndef __FIB_ATTACHED_EXPORT_H__
#define __FIB_ATTACHED_EXPORT_H__
#include <vnet/fib/fib_types.h>
extern void fib_attached_export_import(fib_entry_t *fib_entry,
fib_node_index_t export_fib);
extern void fib_attached_export_purge(fib_entry_t *fib_entry);
extern void fib_attached_export_covered_added(fib_entry_t *cover,
fib_node_index_t covered);
extern void fib_attached_export_covered_removed(fib_entry_t *cover,
fib_node_index_t covered);
extern void fib_attached_export_cover_change(fib_entry_t *fib_entry);
extern void fib_attached_export_cover_update(fib_entry_t *fib_entry);
extern u8* fib_ae_import_format(fib_node_index_t impi, u8*s);
extern u8* fib_ae_export_format(fib_node_index_t expi, u8*s);
#endif
