1 files changed, 85 insertions, 0 deletions
diff --git a/libtransport/src/protocols/rtc/rtc_ldr.h b/libtransport/src/protocols/rtc/rtc_ldr.h
new file mode 100644
index 000000000..24f22ffed
--- /dev/null
+++ b/libtransport/src/protocols/rtc/rtc_ldr.h
@@ -0,0 +1,85 @@
+/*
+ * 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 <hicn/transport/config.h>
+#include <hicn/transport/interfaces/socket_options_keys.h>
+// RtcTransportRecoveryStrategies
+#include <hicn/transport/core/asio_wrapper.h>
+#include <hicn/transport/core/content_object.h>
+#include <hicn/transport/core/name.h>
+#include <protocols/rtc/rtc_recovery_strategy.h>
+
+#include <functional>
+
+namespace transport {
+
+namespace protocol {
+
+namespace rtc {
+
+class RTCLossDetectionAndRecovery
+    : public std::enable_shared_from_this<RTCLossDetectionAndRecovery> {
+ public:
+  RTCLossDetectionAndRecovery(Indexer *indexer, asio::io_service &io_service,
+                              interface::RtcTransportRecoveryStrategies type,
+                              RecoveryStrategy::SendRtxCallback &&callback,
+                              interface::StrategyCallback &&external_callback);
+
+  ~RTCLossDetectionAndRecovery();
+
+  void setState(RTCState *state) { rs_->setState(state); }
+  void setRateControl(RTCRateControl *rateControl) {
+    rs_->setRateControl(rateControl);
+  }
+
+  void setFecParams(uint32_t n, uint32_t k) { rs_->setFecParams(n, k); }
+
+  void setContentSharingMode() { rs_->setContentSharingMode(); }
+  void turnOnRecovery() { rs_->turnOnRecovery(); }
+  bool isRtxOn() { return rs_->isRtxOn(); }
+
+  void changeRecoveryStrategy(interface::RtcTransportRecoveryStrategies type);
+
+  void onNewRound(bool in_sync);
+
+  // the following functions return true if a loss is detected, false otherwise
+  bool onTimeout(uint32_t seq, bool lost);
+  bool onPacketRecoveredFec(uint32_t seq);
+  bool onDataPacketReceived(const core::ContentObject &content_object);
+  bool onNackPacketReceived(const core::ContentObject &nack);
+  bool onProbePacketReceived(const core::ContentObject &probe);
+
+  void clear() { rs_->clear(); }
+
+  bool isRtx(uint32_t seq) { return rs_->isRtx(seq); }
+  bool isPossibleLossWithNoRtx(uint32_t seq) {
+    return rs_->isPossibleLossWithNoRtx(seq);
+  }
+
+  uint64_t getRtxRtt(uint32_t seq) { return rs_->getRtxRtt(seq); }
+
+ private:
+  // returns true if a loss is detected, false otherwise
+  bool detectLoss(uint32_t start, uint32_t stop, bool recv_probe);
+
+  std::shared_ptr<RecoveryStrategy> rs_;
+};
+
+}  // end namespace rtc
+
+}  // end namespace protocol
+
+}  // end namespace transport