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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.
*/
#include "dpo_lr.h"
#include "../strategy.h"
#include "../strategy_dpo_ctx.h"
#include "../faces/face.h"
#include "../strategy_dpo_manager.h"
/* Simple strategy that forwards intertests to all next hops */
/* It does not require to exend the hicn_dpo */
void hicn_receive_data_lr (index_t dpo_idx, int nh_idx);
void hicn_add_interest_lr (index_t dpo_idx);
int hicn_send_after_aggregation_lr (index_t dpo_idx, hicn_face_id_t in_face);
void hicn_on_interest_timeout_lr (index_t dpo_idx);
u32 hicn_select_next_hop_lr (index_t dpo_idx, hicn_face_id_t in_face,
hicn_face_id_t *outfaces, u16 *len);
u8 *hicn_strategy_format_trace_lr (u8 *s, hicn_strategy_trace_t *t);
u8 *hicn_strategy_format_lr (u8 *s, va_list *ap);
static hicn_strategy_vft_t hicn_strategy_lr_vft = {
.hicn_receive_data = &hicn_receive_data_lr,
.hicn_add_interest = &hicn_add_interest_lr,
.hicn_send_after_aggregation = &hicn_send_after_aggregation_lr,
.hicn_on_interest_timeout = &hicn_on_interest_timeout_lr,
.hicn_select_next_hop = &hicn_select_next_hop_lr,
.hicn_format_strategy_trace = &hicn_strategy_format_trace_lr,
.hicn_format_strategy = &hicn_strategy_format_lr
};
/*
* Return the vft of the strategy.
*/
hicn_strategy_vft_t *
hicn_lr_strategy_get_vft (void)
{
return &hicn_strategy_lr_vft;
}
/* DPO should be given in input as it containes all the information to
* calculate the next hops*/
u32
hicn_select_next_hop_lr (index_t dpo_idx, hicn_face_id_t in_face,
hicn_face_id_t *outfaces, u16 *len)
{
hicn_dpo_ctx_t *dpo_ctx = hicn_strategy_dpo_ctx_get (dpo_idx);
*len = 0;
if (dpo_ctx == NULL || dpo_ctx->entry_count == 0)
{
return HICN_ERROR_STRATEGY_NOT_FOUND;
}
// Check if input face is local face
int in_is_local = hicn_face_is_local (in_face);
int i = 0;
while (i < MAX_OUT_FACES && i < dpo_ctx->entry_count)
{
if (hicn_face_is_local (dpo_ctx->next_hops[i]) != in_is_local)
{
outfaces[0] = dpo_ctx->next_hops[i];
*len = 1;
break;
}
i++;
}
return HICN_ERROR_NONE;
}
void
hicn_add_interest_lr (index_t dpo_ctx_idx)
{
/* Nothing to do */
}
int
hicn_send_after_aggregation_lr (index_t dpo_idx, hicn_face_id_t in_face)
{
if (hicn_face_is_local (in_face))
{
return true;
}
return false;
}
void
hicn_on_interest_timeout_lr (index_t dpo_idx)
{
/* Nothing to do in the lr strategy when we receive an interest */
}
void
hicn_receive_data_lr (index_t dpo_idx, int nh_idx)
{
/* nothing to do */
}
/* packet trace format function */
u8 *
hicn_strategy_format_trace_lr (u8 *s, hicn_strategy_trace_t *t)
{
s = format (s,
"Strategy_lr: pkt: %d, sw_if_index %d, next index %d, dpo_type "
"%d, out_face %d",
(int) t->pkt_type, t->sw_if_index, t->next_index, t->dpo_type,
t->out_face);
return (s);
}
u8 *
hicn_strategy_format_lr (u8 *s, va_list *ap)
{
u32 indent = va_arg (*ap, u32);
s = format (
s, "Local-Remote: send from local face to remote only and viceversa \n",
indent);
return (s);
}
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