[HICN-539] Expose portal APIs to applications

Change-Id: Icbaad69981193119714f5689faf3518d2e152e11
Signed-off-by: Mauro Sardara <msardara@cisco.com>

2 files changed, 208 insertions, 0 deletions

diff --git a/libtransport/includes/hicn/transport/interfaces/CMakeLists.txt b/libtransport/includes/hicn/transport/interfaces/CMakeLists.txt
index 38e6143f0..7370ad1b0 100644
--- a/libtransport/includes/hicn/transport/interfaces/CMakeLists.txt
+++ b/libtransport/includes/hicn/transport/interfaces/CMakeLists.txt
@@ -23,6 +23,7 @@ list(APPEND HEADER_FILES
   ${CMAKE_CURRENT_SOURCE_DIR}/callbacks.h
   ${CMAKE_CURRENT_SOURCE_DIR}/verification_policy.h
   ${CMAKE_CURRENT_SOURCE_DIR}/statistics.h
+  ${CMAKE_CURRENT_SOURCE_DIR}/portal.h
 )
 
 if (${OPENSSL_VERSION} VERSION_EQUAL "1.1.1a" OR ${OPENSSL_VERSION} VERSION_GREATER "1.1.1a")
diff --git a/libtransport/includes/hicn/transport/interfaces/portal.h b/libtransport/includes/hicn/transport/interfaces/portal.h
new file mode 100644
index 000000000..724cd7592
--- /dev/null
+++ b/libtransport/includes/hicn/transport/interfaces/portal.h
@@ -0,0 +1,207 @@
+/*
+ * 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/core/content_object.h>
+#include <hicn/transport/core/interest.h>
+#include <hicn/transport/core/prefix.h>
+
+#ifndef ASIO_STANDALONE
+#define ASIO_STANDALONE
+#endif
+#include <asio/io_service.hpp>
+
+#include <functional>
+
+#define UNSET_CALLBACK 0
+
+namespace transport {
+
+namespace interface {
+
+template <typename PrefixType>
+class BasicBindConfig {
+  static_assert(std::is_same<core::Prefix, PrefixType>::value,
+                "Prefix must be a Prefix type.");
+
+  const uint32_t standard_cs_reserved = 5000;
+
+ public:
+  template <typename T>
+  BasicBindConfig(T &&prefix)
+      : prefix_(std::forward<T &&>(prefix)),
+        content_store_reserved_(standard_cs_reserved) {}
+
+  template <typename T>
+  BasicBindConfig(T &&prefix, uint32_t cs_reserved)
+      : prefix_(std::forward<T &&>(prefix)),
+        content_store_reserved_(cs_reserved) {}
+
+  TRANSPORT_ALWAYS_INLINE const PrefixType &prefix() const { return prefix_; }
+
+  TRANSPORT_ALWAYS_INLINE uint32_t csReserved() const {
+    return content_store_reserved_;
+  }
+
+ private:
+  PrefixType prefix_;
+  uint32_t content_store_reserved_;
+};
+
+using BindConfig = BasicBindConfig<core::Prefix>;
+
+class Portal {
+ public:
+  /**
+   * Consumer callback is an abstract class containing two methods to be
+   * implemented by a consumer application.
+   */
+  class ConsumerCallback {
+   public:
+    virtual void onContentObject(core::Interest::Ptr &&i,
+                                 core::ContentObject::Ptr &&c) = 0;
+    virtual void onTimeout(core::Interest::Ptr &&i) = 0;
+    virtual void onError(std::error_code ec) = 0;
+  };
+
+  /**
+   * Producer callback is an abstract class containing two methods to be
+   * implemented by a producer application.
+   */
+  class ProducerCallback {
+   public:
+    virtual void onInterest(core::Interest::Ptr &&i) = 0;
+    virtual void onError(std::error_code ec) = 0;
+  };
+
+  using OnContentObjectCallback =
+      std::function<void(core::Interest::Ptr &&, core::ContentObject::Ptr &&)>;
+  using OnInterestTimeoutCallback = std::function<void(core::Interest::Ptr &&)>;
+
+  Portal();
+
+  Portal(asio::io_service &io_service);
+
+  /**
+   * Set the consumer callback.
+   *
+   * @param consumer_callback - The pointer to the ConsumerCallback object.
+   */
+  void setConsumerCallback(ConsumerCallback *consumer_callback);
+
+  /**
+   * Set the producer callback.
+   *
+   * @param producer_callback - The pointer to the ProducerCallback object.
+   */
+  void setProducerCallback(ProducerCallback *producer_callback);
+
+  /**
+   * Connect the transport to the local hicn forwarder.
+   *
+   * @param is_consumer - Boolean specifying if the application on top of portal
+   * is a consumer or a producer.
+   */
+  void connect(bool is_consumer = true);
+
+  /**
+   * Destructor.
+   */
+  ~Portal();
+
+  /**
+   * Check if there is already a pending interest for a given name.
+   *
+   * @param name - The interest name.
+   */
+  bool interestIsPending(const core::Name &name);
+
+  /**
+   * Send an interest through to the local forwarder.
+   *
+   * @param interest - The pointer to the interest. The ownership of the
+   * interest is transferred by the caller to portal.
+   *
+   * @param on_content_object_callback - If the caller wishes to use a different
+   * callback to be called for this interest, it can set this parameter.
+   * Otherwise ConsumerCallback::onContentObject will be used.
+   *
+   * @param on_interest_timeout_callback - If the caller wishes to use a
+   * different callback to be called for this interest, it can set this
+   * parameter. Otherwise ConsumerCallback::onTimeout will be used.
+   */
+  void sendInterest(
+      core::Interest::Ptr &&interest,
+      OnContentObjectCallback &&on_content_object_callback = UNSET_CALLBACK,
+      OnInterestTimeoutCallback &&on_interest_timeout_callback =
+          UNSET_CALLBACK);
+
+  /**
+   * Register a producer name to the local forwarder and optionally set the
+   * content store size in a per-face manner.
+   *
+   * @param config - The configuration for the local forwarder binding.
+   */
+  void bind(const BindConfig &config);
+
+  void runEventsLoop();
+
+  /**
+   * Run one event and return.
+   */
+  void runOneEvent();
+
+  /**
+   * Send a data packet to the local forwarder. As opposite to sendInterest, the
+   * ownership of the content object is not transferred to the portal.
+   *
+   * @param content_object - The data packet.
+   */
+  void sendContentObject(core::ContentObject &content_object);
+  /**
+   * Stop the event loop, canceling all the pending events in the event queue.
+   *
+   * Beware that stopping the event loop DOES NOT disconnect the transport from
+   * the local forwarder, the connector underneath will stay connected.
+   */
+  void stopEventsLoop();
+
+  /**
+   * Disconnect the transport from the local forwarder.
+   */
+  void killConnection();
+
+  /**
+   * Clear the pending interest hash table.
+   */
+  void clear();
+
+  /**
+   * Get a reference to the io_service object.
+   */
+  asio::io_service &getIoService();
+
+  /**
+   * Register a route to the local forwarder.
+   */
+  void registerRoute(core::Prefix &prefix);
+
+ private:
+  void *implementation_;
+};
+
+}  // namespace interface
+}  // namespace transport
\ No newline at end of file