feat: boostrap hicn 22.02

The current patch provides several new features, improvements,
bug fixes and also complete rewrite of entire components.

- lib
The hicn packet parser has been improved with a new packet
format fully based on UDP. The TCP header is still temporarily
supported but the UDP header will replace completely the new hicn
packet format. Improvements have been made to make sure every
packet parsing operation is made via this library. The current
new header can be used as header between the payload and the
UDP header or as trailer in the UDP surplus area to be tested
when UDP options will start to be used.

- hicn-light
The portable packet forwarder has been completely rewritten from
scratch with the twofold objective to improve performance and
code size but  also to drop dependencies such as libparc which is
now removed by the current implementation.

- hicn control
the control library is the agent that is used to program the
packet forwarders via their binary API. This component has
benefited from significant improvements in terms of interaction
model which is now event driven and more robust to failures.

- VPP plugin has been updated to support VPP 22.02

- transport
Major improvement have been made to the RTC protocol, to the
support of IO modules and to the security sub system. Signed
manifests are the default data authenticity and integrity framework.
Confidentiality can be enabled by sharing the encryption key to the
prod/cons layer. The library has been tested with group key based
applications such as broadcast/multicast and real-time on-line
meetings with trusted server keys or MLS.

- testing
Unit testing has been introduced using GoogleTest. One third of
the code base is covered by unit testing with priority on
critical features. Functional testing has also been introduce
using Docker, linux bridging and Robot Framework to define
test with Less Code techniques to facilitate the extension
of the coverage.

Co-authored-by: Mauro Sardara <msardara@cisco.com>
Co-authored-by: Jordan Augé <jordan.auge+fdio@cisco.com>
Co-authored-by: Michele Papalini <micpapal@cisco.com>
Co-authored-by: Angelo Mantellini <manangel@cisco.com>
Co-authored-by: Jacques Samain <jsamain@cisco.com>
Co-authored-by: Olivier Roques <oroques+fdio@cisco.com>
Co-authored-by: Enrico Loparco <eloparco@cisco.com>
Co-authored-by: Giulio Grassi <gigrassi@cisco.com>

Change-Id: I75d0ef70f86d921e3ef503c99271216ff583c215
Signed-off-by: Luca Muscariello <muscariello@ieee.org>
Signed-off-by: Mauro Sardara <msardara@cisco.com>

1 files changed, 154 insertions, 0 deletions

diff --git a/libtransport/src/core/memif_connector.h b/libtransport/src/core/memif_connector.h
new file mode 100644
index 000000000..d36be4616
--- /dev/null
+++ b/libtransport/src/core/memif_connector.h
@@ -0,0 +1,154 @@
+/*
+ * 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/core/connector.h>
+#include <hicn/transport/portability/portability.h>
+#include <hicn/transport/utils/ring_buffer.h>
+//#include <hicn/transport/core/hicn_vapi.h>
+#include <hicn/transport/core/asio_wrapper.h>
+#include <utils/epoll_event_reactor.h>
+#include <utils/fd_deadline_timer.h>
+
+#include <deque>
+#include <future>
+#include <mutex>
+#include <thread>
+
+extern "C" {
+#include <libmemif.h>
+};
+
+#define _Static_assert static_assert
+
+namespace transport {
+
+namespace core {
+
+#define APP_NAME "libtransport"
+#define IF_NAME "vpp_connection"
+
+class MemifConnector : public Connector {
+  static inline std::size_t kbuf_size = 2048;
+  static inline std::size_t klog2_ring_size = 13;
+
+  using PacketRing = utils::CircularFifo<utils::MemBuf::Ptr, queue_size>;
+  struct Details {
+    // index
+    uint16_t index;
+    // memif conenction handle
+    memif_conn_handle_t conn;
+    // transmit queue id
+    uint16_t tx_qid;
+    // tx buffers
+    memif_buffer_t *tx_bufs;
+    // allocated tx buffers counter
+    // number of tx buffers pointing to shared memory
+    uint16_t tx_buf_num;
+    // rx buffers
+    memif_buffer_t *rx_bufs;
+    // allocated rx buffers counter
+    // number of rx buffers pointing to shared memory
+    uint16_t rx_buf_num;
+    // interface ip address
+    uint8_t ip_addr[4];
+  };
+
+ public:
+  MemifConnector(PacketReceivedCallback &&receive_callback,
+                 PacketSentCallback &&packet_sent,
+                 OnCloseCallback &&close_callback,
+                 OnReconnectCallback &&on_reconnect,
+                 asio::io_service &io_service,
+                 std::string app_name = "Libtransport");
+
+  ~MemifConnector() override;
+
+  void send(Packet &packet) override;
+
+  void send(const utils::MemBuf::Ptr &buffer) override;
+
+  void close() override;
+
+  void connect(uint32_t memif_id, long memif_mode,
+               const std::string &socket_filename,
+               std::size_t buffer_size = kbuf_size,
+               std::size_t log2_ring_size = klog2_ring_size);
+
+  TRANSPORT_ALWAYS_INLINE uint32_t getMemifId() { return memif_id_; };
+
+ private:
+  void init();
+
+  int doSend();
+
+  int createMemif(uint32_t index, uint8_t is_master);
+
+  uint32_t getMemifConfiguration();
+
+  int deleteMemif();
+
+  static int controlFdUpdate(memif_fd_event_t fde, void *private_ctx);
+
+  static int onConnect(memif_conn_handle_t conn, void *private_ctx);
+
+  static int onDisconnect(memif_conn_handle_t conn, void *private_ctx);
+
+  static int onInterrupt(memif_conn_handle_t conn, void *private_ctx,
+                         uint16_t qid);
+
+  void threadMain();
+
+  uint16_t txBurst(uint16_t qid, std::error_code &ec);
+
+  uint16_t bufferAlloc(long n, uint16_t qid, std::error_code &ec);
+
+  void scheduleSend(std::uint64_t delay);
+
+  void sendCallback(const std::error_code &ec);
+
+  auto shared_from_this() { return utils::shared_from(this); }
+
+ private:
+  int epfd;
+  utils::EpollEventReactor event_reactor_;
+  std::thread memif_worker_;
+  std::atomic_bool timer_set_;
+  utils::FdDeadlineTimer send_timer_;
+  utils::FdDeadlineTimer disconnect_timer_;
+  asio::io_service &io_service_;
+  asio::executor_work_guard<asio::io_context::executor_type> work_;
+  Details memif_connection_;
+  uint16_t tx_buf_counter_;
+
+  PacketRing input_buffer_;
+  bool is_reconnection_;
+  bool data_available_;
+  uint32_t memif_id_;
+  uint8_t memif_mode_;
+  std::string app_name_;
+  uint16_t transmission_index_;
+  utils::SpinLock write_msgs_lock_;
+  std::string socket_filename_;
+  std::size_t buffer_size_;
+  std::size_t log2_ring_size_;
+  std::size_t max_memif_bufs_;
+};
+
+}  // end namespace core
+
+}  // end namespace transport