1 files changed, 122 insertions, 0 deletions
diff --git a/hicn-plugin/src/strategies/strategy_rr.c b/hicn-plugin/src/strategies/strategy_rr.c
new file mode 100644
index 000000000..4c65ce52a
--- /dev/null
+++ b/hicn-plugin/src/strategies/strategy_rr.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2017-2020 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_rr.h"
+#include "../strategy.h"
+#include "../strategy_dpo_ctx.h"
+#include "../faces/face.h"
+#include "../hashtb.h"
+#include "../strategy_dpo_manager.h"
+
+/* Simple strategy that chooses the next hop with the maximum weight */
+/* It does not require to exend the hicn_dpo */
+void hicn_receive_data_rr (index_t dpo_idx, int nh_idx);
+void hicn_add_interest_rr (index_t dpo_idx, hicn_hash_entry_t * pit_entry);
+void hicn_on_interest_timeout_rr (index_t dpo_idx);
+u32 hicn_select_next_hop_rr (index_t dpo_idx, int *nh_idx,
+			     hicn_face_id_t* outface);
+u8 *hicn_strategy_format_trace_rr (u8 * s, hicn_strategy_trace_t * t);
+u8 *hicn_strategy_format_rr (u8 * s, va_list * ap);
+
+
+static hicn_strategy_vft_t hicn_strategy_rr_vft = {
+  .hicn_receive_data = &hicn_receive_data_rr,
+  .hicn_add_interest = &hicn_add_interest_rr,
+  .hicn_on_interest_timeout = &hicn_on_interest_timeout_rr,
+  .hicn_select_next_hop = &hicn_select_next_hop_rr,
+  .hicn_format_strategy_trace = &hicn_strategy_format_trace_rr,
+  .hicn_format_strategy = &hicn_strategy_format_rr
+};
+
+/*
+ * Return the vft of the strategy.
+ */
+hicn_strategy_vft_t *
+hicn_rr_strategy_get_vft (void)
+{
+  return &hicn_strategy_rr_vft;
+}
+
+/* DPO should be give in input as it containes all the information to calculate the next hops*/
+u32
+hicn_select_next_hop_rr (index_t dpo_idx, int *nh_idx, hicn_face_id_t* outface)
+{
+  hicn_dpo_ctx_t *dpo_ctx = hicn_strategy_dpo_ctx_get (dpo_idx);
+
+  if (dpo_ctx == NULL)
+    return HICN_ERROR_STRATEGY_NOT_FOUND;
+
+  hicn_strategy_rr_ctx_t *hicn_strategy_rr_ctx =
+    (hicn_strategy_rr_ctx_t *) dpo_ctx->data;
+
+  *outface =
+    dpo_ctx->next_hops[hicn_strategy_rr_ctx->current_nhop];
+
+  hicn_strategy_rr_ctx->current_nhop =
+    (hicn_strategy_rr_ctx->current_nhop + 1) % dpo_ctx->entry_count;
+
+  return HICN_ERROR_NONE;
+}
+
+void
+hicn_add_interest_rr (index_t dpo_ctx_idx, hicn_hash_entry_t * hash_entry)
+{
+  hash_entry->dpo_ctx_id = dpo_ctx_idx;
+  dpo_id_t hicn_dpo_id =
+    { hicn_dpo_strategy_rr_get_type (), 0, 0, dpo_ctx_idx };
+  hicn_strategy_dpo_ctx_lock (&hicn_dpo_id);
+  hash_entry->vft_id = hicn_dpo_get_vft_id (&hicn_dpo_id);
+}
+
+void
+hicn_on_interest_timeout_rr (index_t dpo_idx)
+{
+  /* Nothing to do in the rr strategy when we receive an interest */
+}
+
+void
+hicn_receive_data_rr (index_t dpo_idx, int nh_idx)
+{
+}
+
+
+/* packet trace format function */
+u8 *
+hicn_strategy_format_trace_rr (u8 * s, hicn_strategy_trace_t * t)
+{
+  s = format (s, "Strategy_rr: pkt: %d, sw_if_index %d, next index %d",
+	      (int) t->pkt_type, t->sw_if_index, t->next_index);
+  return (s);
+}
+
+u8 *
+hicn_strategy_format_rr (u8 * s, va_list * ap)
+{
+
+  u32 indent = va_arg (*ap, u32);
+  s =
+    format (s,
+	    "Round Robin: next hop is chosen ciclying between all the available next hops, one after the other.\n",
+	    indent);
+  return (s);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */