1 files changed, 139 insertions, 0 deletions
diff --git a/hicn-plugin/src/strategies/dpo_lr.c b/hicn-plugin/src/strategies/dpo_lr.c
new file mode 100644
index 000000000..59409e25e
--- /dev/null
+++ b/hicn-plugin/src/strategies/dpo_lr.c
@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 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 "dpo_lr.h"
+#include "strategy_lr.h"
+#include "../strategy_dpo_manager.h"
+#include "../strategy_dpo_ctx.h"
+
+/**
+ * @brief DPO type value for the lr_strategy
+ */
+static dpo_type_t hicn_dpo_type_lr;
+
+static const hicn_dpo_vft_t hicn_dpo_lr_vft = {
+  .hicn_dpo_is_type = &hicn_dpo_is_type_strategy_lr,
+  .hicn_dpo_get_type = &hicn_dpo_strategy_lr_get_type,
+  .hicn_dpo_module_init = &hicn_dpo_strategy_lr_module_init,
+  .hicn_dpo_create = &hicn_strategy_lr_ctx_create,
+  .hicn_dpo_update_type = &hicn_strategy_lr_update_ctx_type,
+  .hicn_dpo_add_update_nh = &hicn_strategy_lr_ctx_add_nh,
+  .hicn_dpo_del_nh = &hicn_strategy_lr_ctx_del_nh,
+  .hicn_dpo_format = &hicn_dpo_strategy_lr_format
+};
+
+const static dpo_vft_t dpo_strategy_lr_ctx_vft = {
+  .dv_lock = hicn_strategy_dpo_ctx_lock,
+  .dv_unlock = hicn_strategy_dpo_ctx_unlock,
+  .dv_format = hicn_strategy_dpo_format,
+};
+
+int
+hicn_dpo_is_type_strategy_lr (const dpo_id_t *dpo)
+{
+  return dpo->dpoi_type == hicn_dpo_type_lr;
+}
+
+void
+hicn_dpo_strategy_lr_module_init (void)
+{
+  /*
+   * Register our type of dpo
+   */
+  hicn_dpo_type_lr = hicn_dpo_register_new_type (
+    hicn_nodes_strategy, &hicn_dpo_lr_vft, hicn_lr_strategy_get_vft (),
+    &dpo_strategy_lr_ctx_vft);
+}
+
+dpo_type_t
+hicn_dpo_strategy_lr_get_type (void)
+{
+  return hicn_dpo_type_lr;
+}
+
+//////////////////////////////////////////////////////////////////////////////////////////////////
+
+u8 *
+hicn_dpo_strategy_lr_format (u8 *s, hicn_dpo_ctx_t *dpo_ctx, u32 indent)
+{
+  int i = 0;
+
+  s = format (s, "hicn-lr");
+
+  for (i = 0; i < HICN_PARAM_FIB_ENTRY_NHOPS_MAX; i++)
+    {
+      u8 *buf = NULL;
+      if (i < dpo_ctx->entry_count)
+	buf = format (NULL, "FIB");
+      else if (i >= HICN_PARAM_FIB_ENTRY_NHOPS_MAX - dpo_ctx->tfib_entry_count)
+	buf = format (NULL, "TFIB");
+      else
+	continue;
+
+      s = format (s, "\n");
+      s = format (s, "%U ", format_hicn_face, dpo_ctx->next_hops[i], indent);
+      s = format (s, " %s", buf);
+    }
+
+  return (s);
+}
+
+void
+hicn_strategy_lr_ctx_create (fib_protocol_t proto,
+			     const hicn_face_id_t *next_hop, int nh_len,
+			     index_t *dpo_idx)
+{
+  hicn_dpo_ctx_t *hicn_strategy_ctx;
+
+  /* Allocate a hicn_dpo_ctx on the vpp pool and initialize it */
+  hicn_strategy_ctx = hicn_strategy_dpo_ctx_alloc ();
+
+  *dpo_idx = hicn_strategy_dpo_ctx_get_index (hicn_strategy_ctx);
+
+  init_dpo_ctx (hicn_strategy_ctx, next_hop, nh_len, hicn_dpo_type_lr,
+		(dpo_proto_t) proto);
+}
+
+void
+hicn_strategy_lr_update_ctx_type (hicn_dpo_ctx_t *hicn_strategy_ctx)
+{
+  hicn_strategy_ctx->dpo_type = hicn_dpo_type_lr;
+  // don't care to reset data, it is not used
+}
+
+int
+hicn_strategy_lr_ctx_add_nh (hicn_face_id_t nh, index_t dpo_idx)
+{
+  hicn_dpo_ctx_t *hicn_strategy_dpo_ctx = hicn_strategy_dpo_ctx_get (dpo_idx);
+  u8 pos = 0;
+
+  if (hicn_strategy_dpo_ctx == NULL)
+    {
+      return HICN_ERROR_STRATEGY_NOT_FOUND;
+    }
+
+  hicn_strategy_dpo_ctx_add_nh (nh, hicn_strategy_dpo_ctx, &pos);
+  // nothing else to initialize in this strategy
+  return HICN_ERROR_NONE;
+}
+
+int
+hicn_strategy_lr_ctx_del_nh (hicn_face_id_t face_id, index_t dpo_idx)
+{
+  hicn_dpo_ctx_t *hicn_strategy_dpo_ctx = hicn_strategy_dpo_ctx_get (dpo_idx);
+  // No need to change the current_nhop. It will be updated at the next
+  // selection.
+  return hicn_strategy_dpo_ctx_del_nh (face_id, hicn_strategy_dpo_ctx);
+}