From f54ae4ed4fd2f22525492e2525d0f24a314e65b2 Mon Sep 17 00:00:00 2001
From: Mauro Sardara <msardara@cisco.com>
Date: Wed, 27 May 2020 19:16:27 +0200
Subject: [HICH-618] HTTP proxy automatic configuration.

Change-Id: I6a76b31b743f155a2d9f7b88e84b838265aab6c8
Signed-off-by: Mauro Sardara <msardara@cisco.com>
---
 apps/http-proxy/src/forwarder_interface.h | 102 ++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 apps/http-proxy/src/forwarder_interface.h

(limited to 'apps/http-proxy/src/forwarder_interface.h')

diff --git a/apps/http-proxy/src/forwarder_interface.h b/apps/http-proxy/src/forwarder_interface.h
new file mode 100644
index 000000000..ee0354d32
--- /dev/null
+++ b/apps/http-proxy/src/forwarder_interface.h
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2020 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
+
+extern "C" {
+#include <hicn/ctrl/api.h>
+#include <hicn/util/ip_address.h>
+}
+
+#include <asio.hpp>
+#include <asio/steady_timer.hpp>
+#include <functional>
+#include <thread>
+#include <unordered_map>
+
+namespace transport {
+
+typedef std::function<void(uint32_t, bool)> SetRouteCallback;
+
+struct route_info_t {
+  int family;
+  std::string remote_addr;
+  uint16_t remote_port;
+  std::string route_addr;
+  uint8_t route_len;
+};
+
+using RouteInfoPtr = std::shared_ptr<route_info_t>;
+
+class ForwarderInterface {
+ public:
+  ForwarderInterface(asio::io_service &io_service)
+      : external_ioservice_(io_service),
+        work_(std::make_unique<asio::io_service::work>(internal_ioservice_)),
+        sock_(nullptr),
+        thread_(std::make_unique<std::thread>(
+            [this]() { internal_ioservice_.run(); })),
+        check_routes_timer_(nullptr),
+        pending_add_route_counter_(0),
+        route_id_(0) {}
+
+  ~ForwarderInterface();
+
+  int connectToForwarder();
+
+  void removeConnectedUserNow(uint32_t route_id);
+
+  // to be called at the server
+  // at the client this creates a race condition
+  // and the program enters in a loop
+  void scheduleRemoveConnectedUser(uint32_t route_id);
+
+  template <typename Callback>
+  void createFaceAndRoute(RouteInfoPtr &&route_info, Callback &&callback) {
+    internal_ioservice_.post([this, _route_info = std::move(route_info),
+                              _callback = std::forward<Callback>(callback)]() {
+      pending_add_route_counter_++;
+      uint8_t max_try = 5;
+      auto timer = new asio::steady_timer(internal_ioservice_);
+      internalCreateFaceAndRoute(std::move(_route_info), max_try, timer,
+                                 std::move(_callback));
+    });
+  }
+
+  int32_t getMainListenerPort();
+
+  void close();
+
+ private:
+  void internalRemoveConnectedUser(uint32_t route_id);
+
+  void internalCreateFaceAndRoute(RouteInfoPtr route_info, uint8_t max_try,
+                                  asio::steady_timer *timer,
+                                  SetRouteCallback callback);
+
+  int tryToCreateFaceAndRoute(route_info_t *route_info);
+
+  asio::io_service &external_ioservice_;
+  asio::io_service internal_ioservice_;
+  std::unique_ptr<asio::io_service::work> work_;
+  hc_sock_t *sock_;
+  std::unique_ptr<std::thread> thread_;
+  std::unordered_map<uint32_t, RouteInfoPtr> route_status_;
+  std::unique_ptr<asio::steady_timer> check_routes_timer_;
+  uint32_t pending_add_route_counter_;
+  uint32_t route_id_;
+};
+
+}  // namespace transport
\ No newline at end of file
-- 
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