refactor(io_modules): remove deprecated loopback module

The loopback io-module is not used and its functionalities
are already covered by the forwarder io-module.

We should then deprecate it.

Ticket: HICN-800
Signed-off-by: Mauro Sardara <msardara@cisco.com>
Change-Id: I709b8e27d00c03f009d33846076d65b0fee9a6d8

6 files changed, 0 insertions, 319 deletions

diff --git a/libtransport/src/io_modules/CMakeLists.txt b/libtransport/src/io_modules/CMakeLists.txt
index fcf69cd42..ce7ec221d 100644
--- a/libtransport/src/io_modules/CMakeLists.txt
+++ b/libtransport/src/io_modules/CMakeLists.txt
@@ -70,7 +70,6 @@ else()
 # Compile submodules
 ##############################################################
   add_subdirectory(hicn-light)
-  add_subdirectory(loopback)
   add_subdirectory(forwarder)
 
   if (__vpp__)
diff --git a/libtransport/src/io_modules/loopback/CMakeLists.txt b/libtransport/src/io_modules/loopback/CMakeLists.txt
deleted file mode 100644
index 817effb3b..000000000
--- a/libtransport/src/io_modules/loopback/CMakeLists.txt
+++ /dev/null
@@ -1,30 +0,0 @@
-# Copyright (c) 2021-2022 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.
-
-list(APPEND MODULE_HEADER_FILES
-  ${CMAKE_CURRENT_SOURCE_DIR}/loopback_module.h
-)
-
-list(APPEND MODULE_SOURCE_FILES
-    ${CMAKE_CURRENT_SOURCE_DIR}/loopback_module.cc
-)
-
-build_module(loopback_module
-    SOURCES ${MODULE_SOURCE_FILES}
-    DEPENDS ${DEPENDENCIES}
-    COMPONENT ${LIBTRANSPORT_COMPONENT}
-    INCLUDE_DIRS
-      PRIVATE ${LIBTRANSPORT_INTERNAL_INCLUDE_DIRS} ${Libhicn_INCLUDE_DIRS}
-    DEFINITIONS ${COMPILER_DEFINITIONS}
-    COMPILE_OPTIONS ${COMPILER_OPTIONS}
-)
diff --git a/libtransport/src/io_modules/loopback/local_face.cc b/libtransport/src/io_modules/loopback/local_face.cc
deleted file mode 100644
index 30a46c93b..000000000
--- a/libtransport/src/io_modules/loopback/local_face.cc
+++ /dev/null
@@ -1,74 +0,0 @@
-/*
- * Copyright (c) 2021-2022 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 <glog/logging.h>
-#include <hicn/transport/core/asio_wrapper.h>
-#include <hicn/transport/core/content_object.h>
-#include <hicn/transport/core/interest.h>
-#include <io_modules/loopback/local_face.h>
-
-namespace transport {
-namespace core {
-
-Face::Face(Connector::PacketReceivedCallback &&receive_callback,
-           asio::io_service &io_service, const std::string &app_name)
-    : receive_callback_(std::move(receive_callback)),
-      io_service_(io_service),
-      name_(app_name) {}
-
-Face::Face(const Face &other)
-    : receive_callback_(other.receive_callback_),
-      io_service_(other.io_service_),
-      name_(other.name_) {}
-
-Face::Face(Face &&other)
-    : receive_callback_(std::move(other.receive_callback_)),
-      io_service_(other.io_service_),
-      name_(std::move(other.name_)) {}
-
-Face &Face::operator=(const Face &other) {
-  receive_callback_ = other.receive_callback_;
-  io_service_ = other.io_service_;
-  name_ = other.name_;
-
-  return *this;
-}
-
-Face &Face::operator=(Face &&other) {
-  receive_callback_ = std::move(other.receive_callback_);
-  io_service_ = std::move(other.io_service_);
-  name_ = std::move(other.name_);
-
-  return *this;
-}
-
-void Face::onPacket(const Packet &packet) {
-  DLOG_IF(INFO, VLOG_IS_ON(3)) << "Sending content to local socket.";
-
-  switch (packet->getFormat()) {
-    case HICN_PACKET_FORMAT_INTEREST:
-      rescheduleOnIoService<Interest>(packet);
-      break;
-    case HICN_PACKET_FORMAT_DATA:
-      rescheduleOnIoService<ContentObject>(packet);
-      break;
-    default:
-      /* Should not occur */
-      break;
-  }
-}
-
-}  // namespace core
-}  // namespace transport
diff --git a/libtransport/src/io_modules/loopback/local_face.h b/libtransport/src/io_modules/loopback/local_face.h
deleted file mode 100644
index f54f38afa..000000000
--- a/libtransport/src/io_modules/loopback/local_face.h
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * 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/asio_wrapper.h>
-#include <hicn/transport/core/connector.h>
-#include <hicn/transport/core/global_object_pool.h>
-#include <hicn/transport/utils/move_wrapper.h>
-
-namespace transport {
-namespace core {
-
-class Face {
- public:
-  Face(Connector::PacketReceivedCallback &&receive_callback,
-       asio::io_service &io_service, const std::string &app_name);
-
-  Face(const Face &other);
-  Face(Face &&other);
-  void onPacket(const Packet &packet);
-  Face &operator=(Face &&other);
-  Face &operator=(const Face &other);
-
- private:
-  template <typename T>
-  void rescheduleOnIoService(const Packet &packet) {
-    auto p = core::PacketManager<T>::getInstance().getPacket();
-    p->replace(packet.data(), packet.length());
-    io_service_.get().post([this, p]() mutable {
-      receive_callback_(nullptr, *p, make_error_code(0));
-    });
-  }
-
-  Connector::PacketReceivedCallback receive_callback_;
-  std::reference_wrapper<asio::io_service> io_service_;
-  std::string name_;
-};
-
-}  // namespace core
-}  // namespace transport
diff --git a/libtransport/src/io_modules/loopback/loopback_module.cc b/libtransport/src/io_modules/loopback/loopback_module.cc
deleted file mode 100644
index a7f30eb26..000000000
--- a/libtransport/src/io_modules/loopback/loopback_module.cc
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
- * 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.
- */
-
-#include <glog/logging.h>
-#include <hicn/transport/errors/not_implemented_exception.h>
-#include <io_modules/loopback/loopback_module.h>
-
-namespace transport {
-
-namespace core {
-
-std::vector<std::unique_ptr<LocalConnector>> LoopbackModule::local_faces_;
-std::atomic<uint32_t> LoopbackModule::global_counter_(0);
-
-LoopbackModule::LoopbackModule() : IoModule(), local_id_(~0) {}
-
-LoopbackModule::~LoopbackModule() {}
-
-void LoopbackModule::connect(bool is_consumer) {}
-
-bool LoopbackModule::isConnected() { return true; }
-
-void LoopbackModule::send(Packet &packet) {
-  IoModule::send(packet);
-
-  DLOG_IF(INFO, VLOG_IS_ON(3)) << "LoopbackModule: sending from " << local_id_
-                               << " to " << 1 - local_id_;
-
-  local_faces_.at(1 - local_id_)->send(packet);
-}
-
-void LoopbackModule::send(const utils::MemBuf::Ptr &buffer) {
-  // not supported
-  throw errors::NotImplementedException();
-}
-
-void LoopbackModule::registerRoute(const Prefix &prefix) {
-  // For the moment we route packets from one socket to the other.
-  // Next step will be to introduce a FIB
-  return;
-}
-
-void LoopbackModule::closeConnection() {
-  local_faces_.erase(local_faces_.begin() + local_id_);
-}
-
-void LoopbackModule::init(Connector::PacketReceivedCallback &&receive_callback,
-                          Connector::PacketSentCallback &&sent_callback,
-                          Connector::OnCloseCallback &&close_callback,
-                          Connector::OnReconnectCallback &&reconnect_callback,
-                          asio::io_service &io_service,
-                          const std::string &app_name) {
-  if (local_id_ == uint32_t(~0) && global_counter_ < 2) {
-    local_id_ = global_counter_++;
-    local_faces_.emplace(
-        local_faces_.begin() + local_id_,
-        new LocalConnector(io_service, std::move(receive_callback),
-                           std::move(sent_callback), std::move(close_callback),
-                           std::move(reconnect_callback)));
-  }
-}
-
-void LoopbackModule::processControlMessageReply(utils::MemBuf &packet_buffer) {
-  return;
-}
-
-std::uint32_t LoopbackModule::getMtu() { return interface_mtu; }
-
-bool LoopbackModule::isControlMessage(utils::MemBuf &packet_buffer) {
-  return false;
-}
-
-extern "C" IoModule *create_module(void) { return new LoopbackModule(); }
-
-}  // namespace core
-
-}  // namespace transport
diff --git a/libtransport/src/io_modules/loopback/loopback_module.h b/libtransport/src/io_modules/loopback/loopback_module.h
deleted file mode 100644
index d51f237f4..000000000
--- a/libtransport/src/io_modules/loopback/loopback_module.h
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- * 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/local_connector.h>
-#include <hicn/transport/core/io_module.h>
-#include <hicn/transport/core/prefix.h>
-
-#include <atomic>
-
-namespace transport {
-
-namespace core {
-
-class LoopbackModule : public IoModule {
-  static constexpr std::uint16_t interface_mtu = 1500;
-
- public:
-  LoopbackModule();
-
-  ~LoopbackModule();
-
-  void connect(bool is_consumer) override;
-
-  void send(Packet &packet) override;
-  void send(const utils::MemBuf::Ptr &buffer) override;
-
-  bool isConnected() override;
-
-  void init(Connector::PacketReceivedCallback &&receive_callback,
-            Connector::PacketSentCallback &&sent_callback,
-            Connector::OnCloseCallback &&close_callback,
-            Connector::OnReconnectCallback &&reconnect_callback,
-            asio::io_service &io_service,
-            const std::string &app_name = "Libtransport") override;
-
-  void registerRoute(const Prefix &prefix) override;
-
-  std::uint32_t getMtu() override;
-
-  bool isControlMessage(utils::MemBuf &packet_buffer) override;
-
-  void processControlMessageReply(utils::MemBuf &packet_buffer) override;
-
-  void closeConnection() override;
-
- private:
-  static std::vector<std::unique_ptr<LocalConnector>> local_faces_;
-  static std::atomic<uint32_t> global_counter_;
-
- private:
-  uint32_t local_id_;
-};
-
-extern "C" IoModule *create_module(void);
-
-}  // namespace core
-
-}  // namespace transport