SocketException

Hej udviklere,

Jeg har et problem i mit WinMobile Server Kontrol program.
Jeg kan sagtens compile, men når jeg trykker på min connect knap, så sker der ingenting, og så crasher prgrammet.
I visual studio siger den, at der er et problem med
"_tcpClient.Connect(hostname,port);"

Det har noget med SocketException at gøre.

Jeg er ikke helt så stærk i C#, så jeg håber i kan hjælpe mig.

Her er koderne:

Program.cs:

using System;
using System.IO;
using System.Text;
using System.Net.Sockets;
using System.Threading;
using System.Net;
using System.Linq;
using System.Collections.Generic;
using System.Windows.Forms;

namespace ServerController_CS
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [MTAThread]
        static void Main()
        {
            Application.Run(new Form1());
        }
    }
  
    public class ServerController
  
    {
    
      private TcpClient _tcpClient;
      private StreamWriter _writer;
  
      public void Connect(string hostname, int port)
        {
            _tcpClient = new TcpClient();
            _tcpClient.Connect(hostname, port);
            _writer = new StreamWriter(_tcpClient.GetStream(), Encoding.ASCII);
        }
      public void Disconnect()
        {
            _writer.Dispose();
            _tcpClient.Close();
        }
  
      public void CloseDown()
        {
            sendText("Oops");
        }
  
      private void sendText(string text)
        {
            _writer.WriteLine(text);
            _writer.Flush();
        }
   }
}

Form1.cs:

using System;
using System.IO;
using System.Net.Sockets;
using System.Threading;
using System.Net;
using System.Linq;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace ServerController_CS
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        ServerController _serverController = new ServerController();

        private void Disconnect_Clicked(object sender, EventArgs e)
        {
            _serverController.Disconnect();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            _serverController.CloseDown();
        }

        private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            if ((e.KeyCode == System.Windows.Forms.Keys.Up))
            {
                // Up
            }
            if ((e.KeyCode == System.Windows.Forms.Keys.Down))
            {
                // Down
            }
            if ((e.KeyCode == System.Windows.Forms.Keys.Left))
            {
                // Left
            }
            if ((e.KeyCode == System.Windows.Forms.Keys.Right))
            {
                // Right
            }
            if ((e.KeyCode == System.Windows.Forms.Keys.Enter))
            {
                // Enter
            }

        }

        private void button9_Click(object sender, EventArgs e)
        {
            _serverController.Connect("192.168.0.8", 12345); // Her angives ip og port på serveren
        }

    }
}
     
   

Source koden til min C++ server som skal styres af mit windows mobile program:

#include <windows.h>
#include <string.h>
#include <stdio.h>
#include <iostream>

SOCKET Socket;
char IPAddressStr[128];
short SocketPort = 5011;
bool HasRxAddr = true;
struct in_addr RxAddr;
int SetupSocket();
void HandleTx(const char *text);
void HandleRx();
void Restart();
void Shutdown();
void MoniOff();
void CDtrayOpen();
void CDtrayClose();
void DLGBOX();

int main(int argc, char* argv[])
{
   SetupSocket();
   if(argc == 2)
   {  // I'm to close the other PC
      strcpy(IPAddressStr, argv[1]);
      HandleTx("Please PowerOff");
      HandleRx();
   }
   else
   {  // I'm to be closed
      while(1)
      {
         HandleRx();
      }
   }
}

void HandleTx(const char *text)
{
   struct sockaddr_in sockaddr;
   memset((char *)&sockaddr, 0, sizeof(sockaddr));
   sockaddr.sin_family = AF_INET;
   if(IPAddressStr[0])
      sockaddr.sin_addr.s_addr = inet_addr(IPAddressStr);
   else if(HasRxAddr)
      sockaddr.sin_addr.s_addr = RxAddr.s_addr;
   else
   {
      std::cout << "No Peer Address" << std::endl;
      return;
   }

  if(sockaddr.sin_addr.s_addr == INADDR_NONE)
  {
     std::cout << "Failed to convert IPAddress!" << std::endl;
     return;
  }
  sockaddr.sin_port = htons(SocketPort);
  if(sendto(Socket, text, strlen(text) + 1, 0, (struct sockaddr *)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)
  {
     std::cout << "SendTo Failed" << std::endl;
     exit(2);
  }
}

void HandleRx()
{
   const int MaxLineLength = 256;
   char buffer[MaxLineLength + 1];
   sockaddr_in RxSockAddr;
   int FromLen = sizeof(RxSockAddr);
   if(recvfrom(Socket, buffer, MaxLineLength, 0, (sockaddr *)&RxSockAddr, &FromLen) != SOCKET_ERROR)
   {
      RxAddr = RxSockAddr.sin_addr;
      HasRxAddr = true;
      std::cout << "Received: " << buffer << std::endl;
      if(!strcmp(buffer, "Restart"))
      {
         HandleTx("Received The Restart Message");
         std::cout << "Try To Close" << std::endl;
         Sleep(1000);
         Restart();
      }
      else if(!strcmp(buffer, "Shutdown"))
      {
         HandleTx("Received Shutdown Command");
         Sleep(1000);
         Shutdown();
      }
      else if(!strcmp(buffer, "CDTray Open"))
      {
         HandleTx("Received CD Tray Open Command");
         CDtrayOpen();
      }
      else if(!strcmp(buffer, "CDTray Close"))
      {
         HandleTx("Received CD Tray Close Command");
         CDtrayClose();
      }
      else if(!strcmp(buffer, "Oops"))
      {
          HandleTx("Received Oops Command");
          DLGBOX();
      }
      else if(!strcmp(buffer, "Monitor Off"))
      {
          HandleTx("Received Monitor Off Command");
          MoniOff();
      }
      else if(!strcmp(buffer, "Alive"))
      {
          HandleTx("I am alive!");
      }
      else
      {
         HandleTx("Message Was Received");
      }
   }
   else
   {
      std::cout << "Failed To Receive: " << WSAGetLastError() << std::endl;
      exit(1);
   }
}

int SetupSocket()
{
  WSADATA wsaData;
  struct sockaddr_in sockaddr;
  if(WSAStartup(MAKEWORD(1, 1), &wsaData))
  {
     std::cout << "Failed to start WSA" << std::endl;
     exit(3);
  }

  Socket = socket(AF_INET, SOCK_DGRAM, 0);
  if(Socket == INVALID_SOCKET)
  {
    std::cout << "Failed To Create Socket!" << std::endl;
    return 1;
  }

  memset((char *)&sockaddr, 0, sizeof(sockaddr));
  sockaddr.sin_family = AF_INET;
  sockaddr.sin_port = htons(SocketPort);

  BOOL Flag = TRUE;
  setsockopt(Socket, SOL_SOCKET, SO_REUSEADDR, (char *)&Flag, sizeof(Flag));
  if(bind(Socket, (struct sockaddr *)&sockaddr, sizeof(sockaddr)) < 0)
  {
     std::cout << "Failed to bind socket!" << std::endl;
     return 1;
  }
  return 1;
}

void CleanUp()
{
   if(Socket)
      closesocket(Socket);
   WSACleanup();
}

//--------------------START OF FUNCTIONS--------------------------------
void MoniOff()
{
    ShellExecute(0, "Open", "003.exe", 0, 0, SW_SHOW);
}
void CDtrayOpen()
{
    ShellExecute(0, "Open", "001.exe", 0, 0, SW_SHOW);
}

void CDtrayClose()
{
    ShellExecute(0, "Open", "002.exe", 0, 0, SW_SHOW);
}

void DLGBOX()
{
    MessageBox(NULL, "Gad vide hvor jeg kommer fra hva'? ;)", "hmm?", MB_OK);

}

void Restart()
{
   HANDLE Token;
   LUID luid;
   TOKEN_PRIVILEGES tp;

   if(!OpenProcessToken(GetCurrentProcess(), TOKEN_WRITE, &Token))
   {
      std::cout << "OpenThreadToken error: " << GetLastError() << std::endl;
      return;
   }

   if(!LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME, &luid))
   {
      std::cout << "LookupPrivilegeValue error: " << GetLastError() << std::endl;
      return;
   }

   tp.PrivilegeCount = 1;
   tp.Privileges[0].Luid = luid;
   tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;

   AdjustTokenPrivileges(Token,
                         FALSE,
                         &tp,
                         sizeof(TOKEN_PRIVILEGES),
                         (PTOKEN_PRIVILEGES )NULL,
                         (PDWORD )NULL);

   if(GetLastError() != ERROR_SUCCESS)
   {
      std::cout << "AdjustTokenPrivileges error: " << std::endl;
      return;
   }
   ExitWindowsEx(EWX_REBOOT, 0);
}

void Shutdown()
{
   HANDLE Token;
   LUID luid;
   TOKEN_PRIVILEGES tp;

   if(!OpenProcessToken(GetCurrentProcess(), TOKEN_WRITE, &Token))
   {
      std::cout << "OpenThreadToken error: " << GetLastError() << std::endl;
      return;
   }

   if(!LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME, &luid))
   {
      std::cout << "LookupPrivilegeValue error: " << GetLastError() << std::endl;
      return;
   }

   tp.PrivilegeCount = 1;
   tp.Privileges[0].Luid = luid;
   tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;

   AdjustTokenPrivileges(Token,
                         FALSE,
                         &tp,
                         sizeof(TOKEN_PRIVILEGES),
                         (PTOKEN_PRIVILEGES )NULL,
                         (PDWORD )NULL);

   if(GetLastError() != ERROR_SUCCESS)
   {
      std::cout << "AdjustTokenPrivileges error: " << std::endl;
      return;
   }
   ExitWindowsEx(EWX_SHUTDOWN, 0);
}

//-----------------------END OF FUNCTIONS------------------------------

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