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C-/C++-Quelltext

//Netzwerkprogrammierung Winsock api Socket
//TCP SERVER
#include<cstdio>
#include<iostream>
#include<WinSock2.h>
#include<Windows.h>
using namespace std;
char recbuf[256];

char sendbuf[256];
int main()
{
    //Hilfsvariable
    long res;

    //Versionsdaten
    WSAData wsData;

    //ws2_32.dll aktivieren
    res=WSAStartup(MAKEWORD(2,0),&wsData);
    if(res==0)
    {
        cout<<"WSSTARTUP SUCESSFULL "<< endl;

    }
    else
    {
        cout <<"ERROR WSSTARTUP   " << WSAGetLastError()<<endl;
    }
    //Socket Deskriptoren
    SOCKET slisten, client[2];

    //Socket anfordern b.z.w Kommunikation einrichten
    slisten = socket(AF_INET, SOCK_STREAM, 0);
        if(slisten != INVALID_SOCKET)
    {
        cout<<"SOCKET SUCESSFULL" << endl;

    }
    else
    {
        cout <<"ERROR SOCKET   " << WSAGetLastError()<<endl;
    }

    //Verbindungsinformationen
    sockaddr_in info; // sockaddr
    info.sin_addr.s_addr = inet_addr("127.0.0.1");
    info.sin_family = AF_INET;
    info.sin_port = htons(54345);
    int infolen = sizeof(info);
    res = bind(slisten, (struct sockaddr*)&info,infolen);
    if(res != SOCKET_ERROR)
    {
        cout<<"Bind SUCESSFULL" << endl;

    }
    else
    {
        cout <<"Bind SOCKET   " << WSAGetLastError()<<endl;
    }
    //Warteschlange für einkommende verbindungen
    res = listen(slisten,SOMAXCONN);
    if(res != SOCKET_ERROR)
    {
        cout<<"listen SUCESSFULL "<< endl;

    }
    else
    {
        cout <<"list error  " << WSAGetLastError()<<endl;
    }
    sockaddr_in clientinfo;
    int clientinfolen = sizeof(clientinfo);
    bool ten;
    int ClientAd=0;
    ten=true;





        int counti=0;
    while(ten==true)
    {

        if(ClientAd<=1)
        {
            cout <<ClientAd<< endl;
            client[ClientAd] = accept(slisten, (struct sockaddr*)&clientinfo, &clientinfolen);

          ClientAd++;
                  cout <<ClientAd<< endl;
        if(client[ClientAd] != SOCKET_ERROR)
        {
            cout <<"Client Accepted: " <<inet_ntoa(clientinfo.sin_addr) << ": "
            << ntohs(clientinfo.sin_port) << endl;



        }
        }


        if(res==SOCKET_ERROR)
        {
            cout << "ERROR SEND()" << endl;
        }


        for(int i=0; i<ClientAd; i++)
        {
                  res = recv(client[i], recbuf,256,0);
        if(res==SOCKET_ERROR)
      {
          cout << "Client Disconnected" << endl;
          ten=false;

      }
      else
      {

          cout << res << "Bytes Recieved" << endl;
        cout << recbuf << endl;


      }
      memset(&recbuf,0,sizeof(recbuf));
        }

    }
    closesocket(slisten);
    closesocket(client[0]);
    closesocket(client[1]);
    WSACleanup();
    return 0;

}