1 files changed, 54 insertions, 0 deletions
diff --git a/contrib/epee/src/net_helper.cpp b/contrib/epee/src/net_helper.cpp
new file mode 100644
index 000000000..3543f5716
--- /dev/null
+++ b/contrib/epee/src/net_helper.cpp
@@ -0,0 +1,54 @@
+#include "net/net_helper.h"
+
+namespace epee
+{
+namespace net_utils
+{
+	boost::unique_future<boost::asio::ip::tcp::socket>
+	direct_connect::operator()(const std::string& addr, const std::string& port, boost::asio::steady_timer& timeout) const
+	{
+		// Get a list of endpoints corresponding to the server name.
+		//////////////////////////////////////////////////////////////////////////
+		boost::asio::ip::tcp::resolver resolver(GET_IO_SERVICE(timeout));
+		boost::asio::ip::tcp::resolver::query query(boost::asio::ip::tcp::v4(), addr, port, boost::asio::ip::tcp::resolver::query::canonical_name);
+		boost::asio::ip::tcp::resolver::iterator iterator = resolver.resolve(query);
+		boost::asio::ip::tcp::resolver::iterator end;
+		if(iterator == end) // Documentation states that successful call is guaranteed to be non-empty
+			throw boost::system::system_error{boost::asio::error::fault, "Failed to resolve " + addr};
+
+		//////////////////////////////////////////////////////////////////////////
+
+		struct new_connection
+		{
+			boost::promise<boost::asio::ip::tcp::socket> result_;
+			boost::asio::ip::tcp::socket socket_;
+
+			explicit new_connection(boost::asio::io_service& io_service)
+			  : result_(), socket_(io_service)
+			{}
+		};
+
+		const auto shared = std::make_shared<new_connection>(GET_IO_SERVICE(timeout));
+		timeout.async_wait([shared] (boost::system::error_code error)
+		{
+			if (error != boost::system::errc::operation_canceled && shared && shared->socket_.is_open())
+			{
+				shared->socket_.shutdown(boost::asio::ip::tcp::socket::shutdown_both);
+				shared->socket_.close();
+			}
+		});
+		shared->socket_.async_connect(*iterator, [shared] (boost::system::error_code error)
+		{
+			if (shared)
+			{
+				if (error)
+					shared->result_.set_exception(boost::system::system_error{error});
+				else
+					shared->result_.set_value(std::move(shared->socket_));
+			}
+		});
+		return shared->result_.get_future();
+	}
+}
+}
+