[Boost-users] [asio] Cloning a WSA socket (windows)

Subject: [Boost-users] [asio] Cloning a WSA socket (windows)
From: Tore Halvorsen (tore.halvorsen_at_[hidden])
Date: 2009-02-03 11:43:06

Hi,

I am trying to clone a socket from process to another, mostly for
having one process per client in a network server.
Some legacy stuff makes this the only design possible, so the threaded
approach is simply not feasible...

Anyway, when I'm trying to create a boost socket from a cloned WSA
socket I get an exception.
class boost::exception_detail::clone_impl<
    struct boost::exception_detail::error_info_injector<
        class boost::system::system_error
    >
> : The parameter is incorrect

This same happens for this example program, using boost 1.37

Does anyone have an idea why this does not work?

#ifndef _WIN32_WINNT		
#define _WIN32_WINNT 0x0501	
#endif
#define WIN32_LEAN_AND_MEAN
#define NOMINMAX

#include <windows.h>
#include <winsock2.h>
#pragma comment(lib, "ws2_32")

#include <boost/asio.hpp>

namespace ip = boost::asio::ip;

int main_impl(int argc, char* argv[])
{
    boost::asio::io_service ios;
    ip::tcp::socket s(ios);
    ip::tcp::acceptor a(ios, ip::tcp::endpoint(ip::tcp::v4(), 1777));
    a.accept(s);

    WSAPROTOCOL_INFO info;
    if (WSADuplicateSocket(s.native(), GetCurrentProcessId(), &info))
    {
        std::cerr << "WSAError: " << WSAGetLastError() << std::endl;
        return EXIT_FAILURE;
    }

    // pass info over a pipe to the client...

    SOCKET copy(WSASocket(FROM_PROTOCOL_INFO, FROM_PROTOCOL_INFO
        , FROM_PROTOCOL_INFO, &info, NULL, NULL));

    ip::tcp::socket scopy(ios, ip::tcp::v4(), copy);

        return EXIT_SUCCESS;
}

int main(int argc, char* argv[])
{
        try
        {
                return main_impl(argc, argv);
        }
        catch(std::exception const& ex)
        {
                std::cerr << typeid(ex).name() << ":"
                    << ex.what() << std::endl;
                return EXIT_FAILURE;
        }
}

-- 
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<demo> 2009 Tore Halvorsen || +052 0553034554