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/*
* Copyright (c) 2017-2019 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 __HICN_STRATEGY__
#define __HICN_STRATEGY__
#include "hicn.h"
#include "hashtb.h"
#include "mgmt.h"
#include "faces/face.h"
/**
* @File
*
* A strategy is defined as a vpp node and a set of function that will be called
* during the packet processing. Having one vpp node per strategy allows to
* easily process multiple interests in the same node (x2 or x4) and call the
* same function for choosing the next hop.
* Here we provide:
* - a template for the callbacks to implement in order to create a new strategy
* (hicn_fwd_strategy_t)
* - the base structure for a strategy node
* (list of next vpp nodes, errors, tracing and the main function processing an
* interest and calling hicn_select_next_hop)
*/
typedef struct hicn_strategy_vft_s
{
void (*hicn_receive_data) (index_t dpo_idx, int nh_idx);
void (*hicn_on_interest_timeout) (index_t dpo_idx);
void (*hicn_add_interest) (index_t dpo_idx, hicn_hash_entry_t * pit_entry);
u32 (*hicn_select_next_hop) (index_t dpo_idx, int *nh_idx,
dpo_id_t ** outface);
u32 (*get_strategy_node_index) (void);
/**< Return the vlib node index implementing the strategy */
} hicn_strategy_vft_t;
hicn_face_vft_t *hicn_strategy_get_face_vft (u16 index);
/* Strategy node API */
/* Basic interest processing function. To be called in all the strategy nodes */
uword
hicn_forward_interest_fn (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame,
hicn_strategy_vft_t * strategy,
dpo_type_t dpo_type,
vlib_node_registration_t * hicn_strategy_node);
/* Trace context struct */
typedef struct
{
u32 next_index;
u32 sw_if_index;
u8 pkt_type;
} hicn_strategy_trace_t;
typedef enum
{
HICN_STRATEGY_NEXT_INTEREST_HITPIT,
HICN_STRATEGY_NEXT_INTEREST_HITCS,
HICN_STRATEGY_NEXT_ERROR_DROP,
HICN_STRATEGY_NEXT_EMPTY,
HICN_STRATEGY_N_NEXT,
} hicn_strategy_next_t;
#endif /* //__HICN_STRATEGY__ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables: eval: (c-set-style "gnu") End:
*/
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