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/*
* Copyright (c) 2021 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_STATE__
#define __HICN_STATE__
#include <netinet/in.h>
#include <vnet/buffer.h>
#include "hicn.h"
#include "pcs.h"
#include "strategy.h"
#include "strategy_dpo_ctx.h"
#include "strategy_dpo_manager.h"
/**
* @file plugin_state
*
* Helper functions to hicn state (hash node, hash entry, strategy vft, dpo vft
* and dpo context id)
*
*/
// TODO exploit this state to prefetch hash nodes and entries.
/**
* @brief Retrieve the hicn state
*
* @param hicnb hicn buffer used to retrieve the hicn state
* @param pitcs pointer to PIT/CS
* @param node node in the hash table referring to the buffer
* @param strategy_vft return value pointing to the strategy vft corresponding
* to the buffer
* @param dpo_vft return value pointing to the dpo vft corresponding to the
* buffer
* @param dpo_ctx_id return value pointing to the dpo context id corresponding
* to the buffer
* @param hash_entry entry in the hash table referring to the buffer
*/
always_inline void
hicn_get_internal_state (hicn_buffer_t *hicnb, u32 *pit_entry_index,
const hicn_strategy_vft_t **strategy_vft,
const hicn_dpo_vft_t **dpo_vft, u8 *dpo_ctx_id)
{
*pit_entry_index = hicnb->pcs_entry_id;
*strategy_vft = hicn_dpo_get_strategy_vft (hicnb->vft_id);
*dpo_vft = hicn_dpo_get_vft (hicnb->vft_id);
*dpo_ctx_id = hicnb->dpo_ctx_id;
}
/*
* This function set the PCS entry index, the dpo index and the vft index in
* the opaque2 buffer. In this way, the interest-hitpit and interest-hitcs
* nodes can prefetch the corresponding state (PIT entry, dpo_ctx and the
* strategy vft
*/
/**
* @brief Store the hicn state in the hicn buffer
*
* @param b vlib buffer holding the hICN packet
* @param pcs_entry_index index of the PCS entry
*/
always_inline int
hicn_store_internal_state (vlib_buffer_t *b, u32 pcs_entry_index,
u32 dpo_ctx_id)
{
hicn_buffer_t *hicnb = hicn_get_buffer (b);
hicnb->dpo_ctx_id = dpo_ctx_id;
const hicn_dpo_ctx_t *dpo_ctx =
hicn_strategy_dpo_ctx_get (hicnb->dpo_ctx_id);
if (PREDICT_FALSE (dpo_ctx == NULL))
return HICN_ERROR_DPO_CTX_NOT_FOUND;
hicnb->vft_id = dpo_ctx->dpo_type;
hicnb->pcs_entry_id = pcs_entry_index;
return HICN_ERROR_NONE;
}
#endif /* // __HICN_STATE__ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables: eval: (c-set-style "gnu") End:
*/
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