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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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <hicn/hicn-light/config.h>
#include <hicn/core/nexthops.h>
#include <hicn/core/strategy.h>
#include <hicn/core/strategy_vft.h>
#include "replication.h"
/* Shorthand */
#define strategy_state_t strategy_replication_state_t
static int strategy_replication_initialize(strategy_entry_t *entry,
const void *forwarder) {
entry->forwarder = forwarder;
strategy_state_t *state = &entry->state.replication;
state->prev_nexthops = malloc(sizeof(nexthops_t));
*((nexthops_t *)state->prev_nexthops) = NEXTHOPS_EMPTY;
return 0;
}
static int strategy_replication_finalize(strategy_entry_t *entry) {
/* Nothing to do */
strategy_state_t *state = &entry->state.replication;
free(state->prev_nexthops);
return 0;
}
static int strategy_replication_add_nexthop(strategy_entry_t *entry,
nexthops_t *nexthops,
off_t offset) {
/* Nothing to do */
return 0;
}
static int strategy_replication_remove_nexthop(strategy_entry_t *entry,
nexthops_t *nexthops,
off_t offset) {
/* Nothing to do */
return 0;
}
static nexthops_t *strategy_replication_lookup_nexthops(
strategy_entry_t *entry, nexthops_t *nexthops, const msgbuf_t *msgbuf) {
// if nexthops is different from prev_nexthops send updates
strategy_state_t *state = &entry->state.replication;
if (!nexthops_equal((nexthops_t *)state->prev_nexthops, nexthops)) {
// send updates
strategy_replication_options_t *options = &entry->options.replication;
update_remote_node_paths(nexthops, entry->forwarder,
options->local_prefixes);
// update next hops
nexthops_copy(nexthops, (nexthops_t *)state->prev_nexthops);
}
// Return all next hops
return nexthops;
}
static int strategy_replication_on_data(strategy_entry_t *entry,
nexthops_t *nexthops,
const nexthops_t *data_nexthops,
const msgbuf_t *msgbuf,
Ticks pitEntryCreation,
Ticks objReception) {
/* Nothing to do */
return 0;
}
static int strategy_replication_on_timeout(strategy_entry_t *entry,
nexthops_t *nexthops,
const nexthops_t *timeout_nexthops) {
/* Nothing to do */
return 0;
}
DECLARE_STRATEGY(replication);
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