1 files changed, 82 insertions, 0 deletions
diff --git a/hicn-light/src/hicn/strategies/local_prefixes.c b/hicn-light/src/hicn/strategies/local_prefixes.c
new file mode 100644
index 000000000..fb161ab2a
--- /dev/null
+++ b/hicn-light/src/hicn/strategies/local_prefixes.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2021-2023 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 "local_prefixes.h"
+#include <hicn/core/forwarder.h>
+#include <hicn/core/nexthops.h>
+#include <hicn/core/mapme.h>
+
+#define MAX_PREFIXES 10
+
+struct local_prefixes_s {
+  hicn_prefix_t local_prefixes[MAX_PREFIXES];
+  unsigned len;
+};
+
+local_prefixes_t *create_local_prefixes() {
+  local_prefixes_t *lp = calloc(1, sizeof(local_prefixes_t));
+  if (!lp) return NULL;
+  return lp;
+}
+
+void free_local_prefixes(local_prefixes_t *lp) { free(lp); }
+
+unsigned local_prefixes_get_len(local_prefixes_t *prefixes) {
+  return prefixes->len;
+}
+
+bool contain_prefix(const local_prefixes_t *prefixes,
+                    const hicn_prefix_t *prefix) {
+  for (unsigned i = 0; i < prefixes->len; i++) {
+    if (hicn_prefix_equals(&(prefixes->local_prefixes[i]), prefix)) return true;
+  }
+  return false;
+}
+
+void local_prefixes_add_prefixes(local_prefixes_t *prefixes,
+                                 local_prefixes_t *new_prefixes) {
+  // if there is not enough space for the new prefixes they are not added
+  unsigned i = 0;
+  while ((i < new_prefixes->len) && (prefixes->len < MAX_PREFIXES)) {
+    if (!contain_prefix(prefixes, &(new_prefixes->local_prefixes[i]))) {
+      hicn_prefix_copy(&prefixes->local_prefixes[prefixes->len],
+                       &new_prefixes->local_prefixes[i]);
+      prefixes->len++;
+    }
+    i++;
+  }
+}
+
+void local_prefixes_add_prefix(local_prefixes_t *prefixes,
+                               const hicn_prefix_t *prefix) {
+  if (prefixes->len >= MAX_PREFIXES) return;
+  if (!contain_prefix(prefixes, prefix)) {
+    hicn_prefix_copy(&(prefixes->local_prefixes[prefixes->len]), prefix);
+    prefixes->len++;
+  }
+}
+
+void update_remote_node_paths(const void *nexthops, const void *forwarder,
+                              local_prefixes_t *prefixes) {
+  if (!prefixes) return;
+  struct mapme_s *mapme = forwarder_get_mapme((forwarder_t *)forwarder);
+  fib_t *fib = forwarder_get_fib((forwarder_t *)forwarder);
+  for (unsigned i = 0; i < prefixes->len; i++) {
+    fib_entry_t *entry = fib_match_prefix(fib, &prefixes->local_prefixes[i]);
+    if (!entry) continue;
+    // XXX we don't want to force
+    mapme_set_adjacencies(mapme, entry, (nexthops_t *)nexthops, NULL);
+  }
+}