fec_base.h

/*
 * 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/core/content_object.h>
#include <hicn/transport/errors/not_implemented_exception.h>
 
#include <functional>
 
namespace transport {
namespace protocol {
 
namespace fec {
 
using buffer = typename utils::MemBuf::Ptr;
using BufferArray = std::vector<std::pair<uint32_t, buffer>>;
 
class FECBase {
 public:
  virtual ~FECBase() = default;
  using PacketsReady = std::function<void(BufferArray &)>;
 
  using BufferRequested = std::function<buffer(std::size_t size)>;
 
  virtual std::size_t getFecHeaderSize() = 0;
 
  template <typename Handler>
  void setFECCallback(Handler &&callback) {
    fec_callback_ = std::forward<Handler>(callback);
  }
 
  template <typename Handler>
  void setBufferCallback(Handler &&buffer_callback) {
    buffer_callback_ = buffer_callback;
  }
 
  virtual void reset() = 0;
 
 protected:
  PacketsReady fec_callback_{0};
  BufferRequested buffer_callback_{0};
};
 
class ProducerFEC : public virtual FECBase {
 public:
  virtual ~ProducerFEC() = default;
  virtual void onPacketProduced(core::ContentObject &content_object,
                                uint32_t offset) = 0;
};
 
class ConsumerFEC : public virtual FECBase {
 public:
  virtual ~ConsumerFEC() = default;
 
  virtual void onDataPacket(core::ContentObject &content_object,
                            uint32_t offset) = 0;
};
 
}  // namespace fec
}  // namespace protocol
}  // namespace transport