пятница, 8 мая 2009, T-Rex

Для того чтобы установить соединение с Internet в Windows Mobile предусмотрен специальный программный интерфейс - Connection Manager API. Пользоваться им довольно просто. И вот пример такого использования для C# и C++ приведен ниже:

C# + .NET Compact Framework

using System;
using System.Collections;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Threading;
using System.Reflection;

namespace GPRSConnection
{
    public class GPRSConnection
    {
        const int S_OK = 0;
        const uint CONNMGR_PARAM_GUIDDESTNET = 0x1;
        const uint CONNMGR_FLAG_PROXY_HTTP = 0x1;
        const uint CONNMGR_PRIORITY_USERINTERACTIVE = 0x08000;
        const uint INFINITE = 0xffffffff;
        const uint CONNMGR_STATUS_CONNECTED = 0x10;
        static Hashtable ht = new Hashtable();

        static GPRSConnection()
        {
            ManualResetEvent mre = new ManualResetEvent(false);
            mre.Handle = ConnMgrApiReadyEvent();
            mre.WaitOne();
            CloseHandle(mre.Handle);
        }

        ~GPRSConnection()
        {
            ReleaseAll();
        }

        public static bool Setup(Uri url)
        {
            return Setup(url.ToString());
        }

        public static bool Setup(string urlStr)
        {
            ConnectionInfo ci = new ConnectionInfo();
            IntPtr phConnection = IntPtr.Zero;
            uint status = 0;

            if (ht[urlStr] != null)
                return true;

            if (ConnMgrMapURL(urlStr, ref ci.guidDestNet, IntPtr.Zero) != S_OK)
                return false;

            ci.cbSize = (uint)Marshal.SizeOf(ci);
            ci.dwParams = CONNMGR_PARAM_GUIDDESTNET;
            ci.dwFlags = CONNMGR_FLAG_PROXY_HTTP;
            ci.dwPriority = CONNMGR_PRIORITY_USERINTERACTIVE;
            ci.bExclusive = 0;
            ci.bDisabled = 0;
            ci.hWnd = IntPtr.Zero;
            ci.uMsg = 0;
            ci.lParam = 0;

            if (ConnMgrEstablishConnectionSync(ref ci, ref phConnection, INFINITE, ref status) != S_OK &&
                status != CONNMGR_STATUS_CONNECTED)
                return false;

            ht[urlStr] = phConnection;
            return true;
        }

        public static bool Release(Uri url)
        {
            return Release(url.ToString());
        }

        public static bool Release(string urlStr)
        {
            return Release(urlStr, true);
        }

        private static bool Release(string urlStr, bool removeNode)
        {
            bool res = true;
            IntPtr ph = IntPtr.Zero;
            if (ht[urlStr] == null)
                return true;
            ph = (IntPtr)ht[urlStr];
            if (ConnMgrReleaseConnection(ph, 1) != S_OK)
                res = false;
            CloseHandle(ph);
            if (removeNode)
                ht.Remove(urlStr);
            return res;
        }

        public static void ReleaseAll()
        {
            foreach (DictionaryEntry de in ht)
            {
                Release((string)de.Key, false);
            }
            ht.Clear();
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct ConnectionInfo
        {
            public uint cbSize;
            public uint dwParams;
            public uint dwFlags;
            public uint dwPriority;
            public int bExclusive;
            public int bDisabled;
            public Guid guidDestNet;
            public IntPtr hWnd;
            public uint uMsg;
            public uint lParam;
            public uint ulMaxCost;
            public uint ulMinRcvBw;
            public uint ulMaxConnLatency;
        }

        [DllImport("cellcore.dll")]
        private static extern int ConnMgrMapURL(string pwszURL, ref Guid pguid, IntPtr pdwIndex);

        [DllImport("cellcore.dll")]
        private static extern int ConnMgrEstablishConnectionSync(ref ConnectionInfo ci, ref IntPtr phConnection, uint dwTimeout, ref uint pdwStatus);

        [DllImport("cellcore.dll")]
        private static extern IntPtr ConnMgrApiReadyEvent();

        [DllImport("cellcore.dll")]
        private static extern int ConnMgrReleaseConnection(IntPtr hConnection, int bCache);

        [DllImport("coredll.dll")]
        private static extern int CloseHandle(IntPtr hObject);
    }
}

Пример использования

public void DoTcpConnection()
        {
            string t = System.IO.Path.AltDirectorySeparatorChar.ToString() + System.IO.Path.DirectorySeparatorChar.ToString();
            string url = "www.msn.com";
            bool res = GPRSConnection.Setup(Uri.UriSchemeHttp + 
                Uri.SchemeDelimiter + url + Path.AltDirectorySeparatorChar);
            if (res)
            {
                TcpClient tc = new TcpClient(url, 80);
                NetworkStream ns = tc.GetStream();
                byte[] buf = new byte[100];
                ns.Write(buf, 0, 100);
                tc.Client.Shutdown(SocketShutdown.Both);
                ns.Close();
                tc.Close();
                MessageBox.Show("Wrote 100 bytes");
            }
            else
            {
                MessageBox.Show("Connection establishment failed");
            }
        }

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