1 files changed, 82 insertions, 0 deletions
diff --git a/libtransport/src/protocols/rtc/rtc_forwarding_strategy.h b/libtransport/src/protocols/rtc/rtc_forwarding_strategy.h
new file mode 100644
index 000000000..c2227e09f
--- /dev/null
+++ b/libtransport/src/protocols/rtc/rtc_forwarding_strategy.h
@@ -0,0 +1,82 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+#include <core/portal.h>
+#include <hicn/transport/interfaces/callbacks.h>
+#include <protocols/rtc/rtc_state.h>
+
+#include <array>
+
+namespace transport {
+
+namespace protocol {
+
+namespace rtc {
+
+class RTCForwardingStrategy {
+ public:
+  enum strategy_t {
+    BEST_PATH,
+    REPLICATION,
+    BOTH,
+    NONE,
+  };
+
+  RTCForwardingStrategy();
+  ~RTCForwardingStrategy();
+
+  void initFwdStrategy(std::shared_ptr<core::Portal> portal,
+                       core::Prefix& prefix, RTCState* state,
+                       interface::RtcTransportRecoveryStrategies strategy);
+
+  void checkStrategy();
+  void setCallback(interface::StrategyCallback&& callback);
+
+ private:
+  void checkStrategyBestPath();
+  void checkStrategyReplication();
+  void checkStrategyBoth();
+
+  void setStrategy(strategy_t strategy);
+
+  std::array<std::string, 4> string_strategies_ = {"bestpath", "replication",
+                                                   "both", "none"};
+
+  bool low_rate_app_;             // if set to true the best path strategy will
+                                  // trigger a path switch based on the quality
+                                  // score, otherwise it will use the RTT,
+                                  // queuing delay and loss rate
+  bool init_;                     // true if all val are initializes
+  bool forwarder_set_;            // true if the strategy is been set at least
+                                  // once
+  strategy_t selected_strategy_;  // this is the strategy selected using socket
+                                  // options. this can also be equal to BOTH
+  strategy_t current_strategy_;   // if both strategies can be used this
+                                  // indicates the one that is currently in use
+                                  // that can be only replication or best path
+  uint32_t rounds_since_last_set_;
+  core::Prefix prefix_;
+  std::shared_ptr<core::Portal> portal_;
+  RTCState* state_;
+  interface::StrategyCallback callback_;
+};
+
+}  // namespace rtc
+
+}  // namespace protocol
+
+}  // namespace transport