1 files changed, 98 insertions, 0 deletions
diff --git a/hicn-light/src/hicn/strategies/replication.c b/hicn-light/src/hicn/strategies/replication.c
new file mode 100644
index 000000000..86a3e3431
--- /dev/null
+++ b/hicn-light/src/hicn/strategies/replication.c
@@ -0,0 +1,98 @@
+/*
+ * 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);