Hello there, New to the list and using Boost Asio. I've implemented an SSL connection using async_connect ok, but find that it seems to leave resources allocated when completed and the SSL connection object is destroyed. The application using the Boost SSL functionality creates a socket connection as required then releases it. Its running on a windows platform with Microsoft Visual Studio 2008 and Boost 1.36.0. The problem can be easily illustrated by simple modification of http://www.boost.org/doc/libs/1_36_0/doc/html/boost_asio/example/ssl/cli ent.cpp to place the main functionality in a loop. Then monitoring the process using TaskManager to display Mem Usage and Handles shows both steadily going up. The number of handles increments by 1,2 or 3 on each async_connect. This happens regardless of whether it actually manages to connect or not. A modification to not use SSL has no effect. A further modification to use a synchronous connect and the program then does not bleed resources. Is this a known problem ? Or is there something which I should be releasing myself ? The actual code I tested is shown below. The relevant parts are: 1) main() line 140: while (true) 2) class client() line 32: simple socket connect (resources released ok) 3) class client() line 41: original async_connect (resources not released ok) Any ideas gratefully received ! /Jim // // client.cpp // ~~~~~~~~~~ // // Copyright (c) 2003-2008 Christopher M. Kohlhoff (chris at kohlhoff dot com) // // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) // #include <cstdlib> #include <iostream> #include <boost/bind.hpp> #include <boost/asio.hpp> #include <boost/asio/ssl.hpp> using boost::asio::ip::tcp; enum { max_length = 1024 }; class client { public: client(boost::asio::io_service& io_service, boost::asio::ssl::context& context, boost::asio::ip::tcp::resolver::iterator endpoint_iterator) : simpleSocket_(io_service) ,socket_(io_service, context) { boost::asio::ip::tcp::endpoint endpoint = *endpoint_iterator; // This consumes no resources simpleSocket_.connect(endpoint); // This consumes resources // simpleSocket_.async_connect(endpoint, // boost::bind(&client::handle_connect, this, // boost::asio::placeholders::error, // ++endpoint_iterator)); // This original code consumes resources // socket_.lowest_layer().async_connect(endpoint, // boost::bind(&client::handle_connect, this, // boost::asio::placeholders::error, ++endpoint_iterator)); } void handle_connect(const boost::system::error_code& error, boost::asio::ip::tcp::resolver::iterator endpoint_iterator) { std::cout << "handled connect"; return; if (!error) { socket_.async_handshake(boost::asio::ssl::stream_base::client, boost::bind(&client::handle_handshake, this, boost::asio::placeholders::error)); } else if (endpoint_iterator != boost::asio::ip::tcp::resolver::iterator()) { socket_.lowest_layer().close(); boost::asio::ip::tcp::endpoint endpoint = *endpoint_iterator; socket_.lowest_layer().async_connect(endpoint, boost::bind(&client::handle_connect, this, boost::asio::placeholders::error, ++endpoint_iterator)); } else { std::cout << "Connect failed: " << error << "\n"; } } void handle_handshake(const boost::system::error_code& error) { if (!error) { std::cout << "Enter message: "; std::cin.getline(request_, max_length); size_t request_length = strlen(request_); boost::asio::async_write(socket_, boost::asio::buffer(request_, request_length), boost::bind(&client::handle_write, this, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred)); } else { std::cout << "Handshake failed: " << error << "\n"; } } void handle_write(const boost::system::error_code& error, size_t bytes_transferred) { if (!error) { boost::asio::async_read(socket_, boost::asio::buffer(reply_, bytes_transferred), boost::bind(&client::handle_read, this, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred)); } else { std::cout << "Write failed: " << error << "\n"; } } void handle_read(const boost::system::error_code& error, size_t bytes_transferred) { if (!error) { std::cout << "Reply: "; std::cout.write(reply_, bytes_transferred); std::cout << "\n"; } else { std::cout << "Read failed: " << error << "\n"; } } private: tcp::socket simpleSocket_; boost::asio::ssl::stream<boost::asio::ip::tcp::socket> socket_; char request_[max_length]; char reply_[max_length]; }; int main(int argc, char* argv[]) { try { if (argc != 3) { std::cerr << "Usage: client <host> <port>\n"; return 1; } while (true) { std::cout << "Creating service\n"; boost::asio::io_service io_service; boost::asio::ip::tcp::resolver resolver(io_service); boost::asio::ip::tcp::resolver::query query(argv[1], argv[2]); boost::asio::ip::tcp::resolver::iterator iterator = resolver.resolve(query); boost::asio::ssl::context ctx(io_service, boost::asio::ssl::context::sslv23); ctx.set_verify_mode(boost::asio::ssl::context::verify_peer); ctx.load_verify_file("ca.pem"); client c(io_service, ctx, iterator); io_service.run(); } } catch (std::exception& e) { std::cerr << "Exception: " << e.what() << "\n"; } return 0; }