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/*
* Copyright (c) 2017 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.
*/
#ifndef __ABF_H__
#define __ABF_H__
#include <vnet/fib/fib_node.h>
#define ABF_PLUGIN_VERSION_MAJOR 1
#define ABF_PLUGIN_VERSION_MINOR 0
/**
* An ACL based Forwading 'policy'.
* This comprises the ACL index to match against and the forwarding
* path to take if the match is successfull.
*
* ABF policies are then 'attached' to interfaces. An input feature
* will run through the list of policies a match will divert the packet,
* if all miss then we continues down the interface's feature arc
*/
typedef struct abf_policy_t_
{
/**
* Linkage into the FIB graph
*/
fib_node_t ap_node;
/**
* ACL index to match
*/
u32 ap_acl;
/**
* The path-list describing how to forward in case of a match
*/
fib_node_index_t ap_pl;
/**
* Sibling index on the path-list
*/
u32 ap_sibling;
/**
* The policy ID - as configured by the client
*/
u32 ap_id;
} abf_policy_t;
/**
* Get an ABF object from its VPP index
*/
extern abf_policy_t *abf_policy_get (index_t index);
/**
* Find a ABF object from the client's policy ID
*
* @param policy_id Client's defined policy ID
* @return VPP's object index
*/
extern index_t abf_policy_find (u32 policy_id);
/**
* The FIB node type for ABF policies
*/
extern fib_node_type_t abf_policy_fib_node_type;
/**
* Create or update an ABF Policy
*
* @param policy_id User defined Policy ID
* @param acl_index The ACL the policy with match on
* @param rpaths The set of paths to add to the forwarding set
*/
extern void abf_policy_update (u32 policy_id,
u32 acl_index,
const fib_route_path_t * rpaths);
/**
* Delete paths from an ABF Policy. If no more paths exist, the policy
* is deleted.
*
* @param policy_id User defined Policy ID
* @param rpaths The set of paths to forward remove
*/
extern int abf_policy_delete (u32 policy_id, const fib_route_path_t * rpaths);
/**
* Callback function invoked during a walk of all policies
*/
typedef int (*abf_policy_walk_cb_t) (index_t index, void *ctx);
/**
* Walk/visit each of the ABF policies
*/
extern void abf_policy_walk (abf_policy_walk_cb_t cb, void *ctx);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
#endif
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