Reimplement whole stratum network communication with boost::asio (#90)

Logger is now thread safe

src/net/Connection.cpp

@@ -0,0 +1,89 @@
+/* XMRigCC
+ * Copyright 2018      Sebastian Stolzenberg <https://github.com/sebastianstolzenberg>
+ * Copyright 2018-     BenDr0id <ben@graef.in>
+ *
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <iostream>
+#include <boost/exception/diagnostic_information.hpp>
+#include <log/Log.h>
+
+#include "Connection.h"
+#include "BoostTcpConnection.h"
+
+#ifndef XMRIG_NO_TLS
+#include "BoostTlsConnection.h"
+#endif
+
+Connection::Connection(const ConnectionListener::Ptr &listener)
+        : listener_(listener)
+{
+}
+
+void Connection::notifyConnected()
+{
+    ConnectionListener::Ptr listener = listener_.lock();
+    if (listener)
+    {
+        listener->scheduleOnConnected();
+    }
+}
+
+void Connection::notifyRead(char* data, size_t size)
+{
+    ConnectionListener::Ptr listener = listener_.lock();
+    if (listener)
+    {
+        listener->scheduleOnReceived(data, size);
+    }
+}
+
+void Connection::notifyError(const std::string& error)
+{
+    ConnectionListener::Ptr listener = listener_.lock();
+    if (listener)
+    {
+        listener->scheduleOnError(error);
+    }
+}
+
+
+Connection::Ptr establishConnection(const ConnectionListener::Ptr& listener,
+                                    ConnectionType type, const std::string& host, uint16_t port)
+{
+    Connection::Ptr connection;
+
+    try {
+        switch (type) {
+            case CONNECTION_TYPE_TLS:
+#ifndef XMRIG_NO_TLS
+                connection = establishBoostTlsConnection(listener);
+                break;
+#endif
+            case CONNECTION_TYPE_TCP:
+                connection = establishBoostTcpConnection(listener);
+                break;
+        }
+
+        connection->connect(host, port);
+    }
+    catch (...) {
+        LOG_ERR("[%s:%d] Failed to establish connection: %s", host.c_str(), port, boost::current_exception_diagnostic_information().c_str());
+    }
+
+
+    return connection;
+}