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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 <hicn/core/nexthops.h>
#include <hicn/core/forwarder.h>
#include "local_remote.h"
static int strategy_local_remote_initialize(strategy_entry_t *entry,
const void *forwarder) {
printf("INIT FWD STRATEGY REMOTE LOCAL\n");
srand((unsigned int)time(NULL));
entry->forwarder = forwarder;
return 0;
}
static int strategy_local_remote_finalize(strategy_entry_t *entry) {
/* Nothing to do */
return 0;
}
static int strategy_local_remote_add_nexthop(strategy_entry_t *entry,
nexthops_t *nexthops,
off_t offset) {
/* Nothing to do */
return 0;
}
static int strategy_local_remote_remove_nexthop(strategy_entry_t *entry,
nexthops_t *nexthops,
off_t offset) {
/* Nothing to do */
return 0;
}
static nexthops_t *strategy_local_remote_lookup_nexthops(
strategy_entry_t *entry, nexthops_t *nexthops, const msgbuf_t *msgbuf) {
if (!entry->forwarder) {
// the forwarder does not exists, drop packet
nexthops_disable_all(nexthops);
return nexthops;
}
unsigned cid = msgbuf_get_connection_id(msgbuf);
connection_table_t *table = forwarder_get_connection_table(entry->forwarder);
if (!table) {
// the connection table does not exists, drop packet.
nexthops_disable_all(nexthops);
return nexthops;
}
connection_t *in = connection_table_get_by_id(table, cid);
if (!in) {
// the ingress connection does not exists, drop packet.
nexthops_disable_all(nexthops);
return nexthops;
}
bool in_is_local = connection_is_local(in);
nexthops_enumerate(nexthops, i, nexthop, {
connection_t *out = connection_table_get_by_id(table, nexthop);
if (out) {
if (connection_is_local(out) != in_is_local) {
// this connection satisfies the requirements, send the intetest here.
nexthops_select(nexthops, i);
return nexthops;
}
}
});
// no out connection satisfies the requirements, drop packet.
nexthops_disable_all(nexthops);
return nexthops;
}
static int strategy_local_remote_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_local_remote_on_timeout(
strategy_entry_t *entry, nexthops_t *nexthops,
const nexthops_t *timeout_nexthops) {
/* Nothing to do */
return 0;
}
DECLARE_STRATEGY(local_remote);
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