1 files changed, 142 insertions, 0 deletions
diff --git a/libtransport/src/protocols/raaqm.h b/libtransport/src/protocols/raaqm.h
new file mode 100644
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+++ b/libtransport/src/protocols/raaqm.h
@@ -0,0 +1,142 @@
+/*
+ * Copyright (c) 2017-2019 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/utils/chrono_typedefs.h>
+
+#include <protocols/byte_stream_reassembly.h>
+#include <protocols/congestion_window_protocol.h>
+#include <protocols/protocol.h>
+#include <protocols/raaqm_data_path.h>
+#include <protocols/rate_estimation.h>
+
+#include <queue>
+#include <vector>
+
+namespace transport {
+
+namespace protocol {
+
+class RaaqmTransportProtocol : public TransportProtocol,
+                               public CWindowProtocol {
+ public:
+  RaaqmTransportProtocol(implementation::ConsumerSocket *icnet_socket);
+
+  ~RaaqmTransportProtocol();
+
+  int start() override;
+
+  void resume() override;
+
+  void reset() override;
+
+  virtual bool verifyKeyPackets() override;
+
+ protected:
+  static constexpr uint32_t buffer_size =
+      1 << interface::default_values::log_2_default_buffer_size;
+  static constexpr uint16_t mask = buffer_size - 1;
+  using PathTable =
+      std::unordered_map<uint32_t, std::unique_ptr<RaaqmDataPath>>;
+
+  void increaseWindow() override;
+  void decreaseWindow() override;
+
+  virtual void afterContentReception(const Interest &interest,
+                                     const ContentObject &content_object);
+  virtual void afterDataUnsatisfied(uint64_t segment);
+
+  virtual void updateStats(uint32_t suffix, uint64_t rtt,
+                           utils::TimePoint &now);
+
+ private:
+  void init();
+
+  void onContentObject(Interest::Ptr &&i, ContentObject::Ptr &&c) override;
+
+  void onContentSegment(Interest::Ptr &&interest,
+                        ContentObject::Ptr &&content_object);
+
+  void onPacketDropped(Interest::Ptr &&interest,
+                       ContentObject::Ptr &&content_object) override;
+
+  void onReassemblyFailed(std::uint32_t missing_segment) override;
+
+  void onTimeout(Interest::Ptr &&i) override;
+
+  virtual void scheduleNextInterests() override;
+
+  void sendInterest(std::uint64_t next_suffix);
+
+  void sendInterest(Interest::Ptr &&interest);
+
+  void onContentReassembled(std::error_code ec) override;
+
+  void updateRtt(uint64_t segment);
+
+  void RAAQM();
+
+  void updatePathTable(const ContentObject &content_object);
+
+  void checkDropProbability();
+
+  void checkForStalePaths();
+
+  void printRtt();
+
+ protected:
+  // Congestion window management
+  double current_window_size_;
+  // Protocol management
+  uint64_t interests_in_flight_;
+  std::array<std::uint32_t, buffer_size> interest_retransmissions_;
+  std::array<utils::TimePoint, buffer_size> interest_timepoints_;
+  std::queue<Interest::Ptr> interest_to_retransmit_;
+
+ private:
+  /**
+   * Current download path
+   */
+  RaaqmDataPath *cur_path_;
+
+  /**
+   * Hash table for path: each entry is a pair path ID(key) - path object
+   */
+  PathTable path_table_;
+
+  // TimePoints for statistic
+  utils::TimePoint t0_;
+
+  bool set_interest_filter_;
+
+  // for rate-estimation at packet level
+  IcnRateEstimator *rate_estimator_;
+
+  // params for autotuning
+  bool raaqm_autotune_;
+  double default_beta_;
+  double default_drop_;
+  double beta_wifi_;
+  double drop_wifi_;
+  double beta_lte_;
+  double drop_lte_;
+  unsigned int wifi_delay_;
+  unsigned int lte_delay_;
+};
+
+}  // end namespace protocol
+
+}  // end namespace transport