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2013-08-26T00:10:17.797
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OK, I found a solution to this issue. Under linux it's not necessary, but under windows I discovered that if you are neither binding nor connecting, you must have transmitted something before you make the call to asynch_recieve_from(), the call to which is included within my this->asynch_receive() method. My solution, make a dummy transmission of an empty string immediately before making the asynch_receive call under windows, so the modified code becomes: <pre><code>m_socketPtr->set_option(boost::asio::socket_base::broadcast(true)); // If no local port is specified, default parameter is 0 // If local port is specified, bind to that port. if(localPort != 0) { boost::asio::ip::udp::endpoint localEndpoint(boost::asio::ip::address_v4::any(), localPort); m_socketPtr->bind(localEndpoint); } if(m_forceConnect) m_socketPtr->connect(m_targetEndPoint); // A dummy TX is required for the socket to acquire the local port properly under windoze // Transmitting an empty string works fine for this, but the TX must take place BEFORE the first call to Asynch_receive_from(...) #ifdef WIN32 m_socketPtr->send_to(boost::asio::buffer("", 0), m_targetEndPoint); #endif this->AsyncReceive(); // Register Asynch Recieve callback and buffer m_socketThread = boost::shared_ptr<boost::thread>(new boost::thread(boost::bind(&MyNetworkBase::RunSocketThread, this))); </code></pre> It's a bit of a hack in my book, but it is a lot better than implementing all the requirements to defer the call to the asynch recieve until after the first transmission. 
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