C - Netzwerkprogrammierung - Windows-Client zu Ubuntu-Server (in VM)

/* Server - Ubuntu
*******************/

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <fcntl.h>
#include <errno.h>
////////////////////////////////////
#ifdef _WIN32
int betriebssystem = 1;
#include <winsock2.h>
#include <ws2tcpip.h>
#include <iphlpapi.h>
#include <ws2def.h>
#pragma comment(lib, "Ws2_32.lib") 
#include <windows.h>
#include <io.h>
#else
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
int betriebssystem = 2;
#endif
///////////////////////////////////
///////////////////////////////////
///////////////////////////////////
///////////////////////////////////
//#define HTTP_PORT 20480
#define MAXBUF 8192

int sock;
int port;
int protokoll;
int partner_address_len;
int partner_verbindung;
struct sockaddr_in host_addr, partner_sock_addr;
struct hostent *hostinfo;
//char *host, *file;
//char command[1024];
//char buf[1024];
//unsigned int bytes_sent, bytes_recv;
//////////////////////////////////
int int_besteatigen;
int binden;
int listen_puffer;
int beenden = 0;
char buffer[MAXBUF];
int msg_len;
//////////////////////////////////

int main(int argc, char **argv) {


    //Socket esretllen
    printf("Initialisierung des Sockets");  
    sock = socket(AF_INET, SOCK_STREAM, 0);

    //Adresse des Servers festlegen
    memset( &host_addr, 0, sizeof (host_addr));
    host_addr.sin_family = AF_INET;
    protokoll = host_addr.sin_family;

    //Port festlegen
    host_addr.sin_port = htons(20480);
    port = host_addr.sin_port;

    //IP-Adresse festlegen
    host_addr.sin_addr.s_addr = inet_addr("192.168.1.64");  

    //Anbindung der Port ID an das Socket() - mit BIND()
    binden = bind(sock, (struct sockaddr*)&host_addr, sizeof(host_addr));

    //Warteschlange
    listen_puffer = listen(sock, 5);

    /*Hier hängt sich das Script auf, da selbstverständlich keine Verbindung zu stande kommt*/
    
    while(beenden != 1){

        if(beenden == 1){

            exit(0);

        }

        /* Initialisiere TCP für Windows ("winsock") */ 
        if (betriebssystem == 1){

            return 0;
  
        }

        /* Initialisiere TCP für Linux */
        else{

            printf("\n*******************************************************");  
            printf("\nElse Zweig - Linux");  
            printf("\n*******************************************************");  
            //Internet Protokoll Vers.2 == IPv4
            printf("\nInternet Protokoll Server:            %d", protokoll);  
            printf("\nIP-Adresse Server:                    %s", inet_ntoa(host_addr.sin_addr));  
            printf("\nPort Server:                          %d", port);  
            printf("\nSocket:                               %d", sock);  
            //binden muss 0 sein bei Erfolg
            printf("\nVariable Gebundener Port -> Socket :  %d", binden);  
            printf("\n*******************************************************\n");  

            //Annahme von Client Verbindungen - Neuer Socket zum aufrufenden Client anlegen
            printf("\n\nVerbindung...");  
            partner_address_len = sizeof(partner_sock_addr);
            partner_verbindung = accept(sock, (struct sockaddr *)&partner_sock_addr, (socklen_t *)&partner_address_len);
            printf("\nVerbindung: %d", partner_verbindung);  
            sleep(5);

            }

/*
            //Warten auf Anfrage des Client
            //recv() zum Einlesen von Daten
            //recv() Buffer zwischen Host und Client muss zur Erreichung gleich definiert sein
            msg_len = recv(partner_verbindung, buffer, MAXBUF , 0);
            printf("\nAnfrage des: %s\n", buffer); 

            
            //Error Logs2
            if(msg_len == -1){

                perror("\nrecv()"); 
                exit(EXIT_FAILURE);

            }
    

            //Senden des Buffer Speichers zurück an den Client
            sprintf(buffer, "\nSenden an Clienten: %s", "Server_kuhkuh"); 
            send(partner_verbindung, buffer, strlen(buffer), 0);
*/
            //Beenden Verbindung zum Clienten
            close(partner_verbindung);

        }

        //Server Script beenden
        if(beenden == 0){


            printf("\n\nZum beenden bestätigen Sie mit 8:: ");  
            scanf("%d", &int_besteatigen);  

            if(int_besteatigen == 8){

                beenden = 1;
                exit(0);

            }
        }

        else{

            return 0;
        }

    }
}

/* Client-Windows Script
************************/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <fcntl.h>
#include <errno.h>
////////////////////////////////////
#ifdef _WIN32
int betriebssystem = 1;
#include <winsock2.h>
#include <ws2tcpip.h>
#include <iphlpapi.h>
#include <ws2def.h>
#pragma comment(lib, "Ws2_32.lib") 
#include <windows.h>
#include <io.h>
#else
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
int betriebssystem = 2;
#endif
///////////////////////////////////
///////////////////////////////////
///////////////////////////////////
///////////////////////////////////
#define MAXBUF 8192

int sock;
int port;
int protokoll;
int ip_address_fehler;
int partner_address_len;
int partner_verbindung;
struct sockaddr_in host_addr, partner_host_addr;
struct hostent *host;
//////////////////////////////////
int int_besteatigen;
int binden;
int beenden = 0;
long rc;
char buffer[MAXBUF];
int msg_len;
//////////////////////////////////

int startWinsock(void){

    WSADATA wsaData;
    //return WSAStartup(MAKEWORD(2,0),&wsa);
    int wVersionRequested;
    wVersionRequested = MAKEWORD (1, 1);

    if (WSAStartup (wVersionRequested, &wsaData) != 0){

        fprintf( stderr, "Failed to init windows sockets\n");  
        exit(1);

    }

    return WSAStartup;

}

int main(int argc, char **argv) {

    while(beenden != 1){

        if (betriebssystem == 1){

            printf("\nInitialisierung des Windows Sockets");  

            rc = startWinsock();

            sock = socket(AF_INET, SOCK_STREAM, 0);

            //Adresse des Servers festlegen
            memset( &partner_host_addr, 0, sizeof(partner_host_addr));
            partner_host_addr.sin_family = AF_INET;
            protokoll = partner_host_addr.sin_family;

            //Port festlegen
            partner_host_addr.sin_port = htons(20480);
            //partner_host_addr.sin_port = getservbyname("http","tcp"); 
            port = partner_host_addr.sin_port;

            //IP-Adresse des Servers festlegen
            partner_host_addr.sin_addr.s_addr = inet_pton(AF_INET, "192.168.1.64", &partner_host_addr.sin_addr.s_addr);  

            printf("\n*******************************************************");  
            //Internet Protokoll Vers.2 == IPv4
            printf("\nInternet Protokoll Server:            %d", protokoll);  
            printf("\nIP-Adresse Server Konvertierung:      %d", partner_host_addr.sin_addr.s_addr); //1 beim Debuggen___ scheint korrekt umgesetzt zu werden??  
            printf("\nIP-Adresse Server:                    %s", "192.168.1.64");  
            printf("\nPort Server:                          %d", port);  
            printf("\nSocket:                               %d" ,sock);  
            printf("\n*******************************************************\n");  

            ip_address_fehler = host_addr.sin_addr.s_addr;

            if(ip_address_fehler == -1){

                printf("IP_Adresse nicht gefunden: %d", ip_address_fehler);  
                return 0;
            }

            rc = connect(sock, (struct sockaddr *)&host_addr, sizeof(host_addr));
            printf("\nVerbindung: %d", rc);  

            if(rc == SOCKET_ERROR){

                for(int i; i<=15; i++){

                    rc = connect(sock, (struct sockaddr *)&host_addr, sizeof(host_addr));
                    printf("\nErneut keine Verbindung: %d Verbindungsversuch %d", WSAGetLastError(), i);  
                    
                    /*Hier hängt sich das Script weg!*/
                    
                    sleep(1);

                    if(rc != -1){

                        break;
                    }
                }

                if(rc == SOCKET_ERROR){
                    exit(0);
                }
            }

            else{

                printf("Verbunden mit Server: 192.168.1.64");  

            }


        }

        /* Initialisiere TCP für Linux */
        else{

            return 0;

        }

        //Client Script beenden
        if(beenden == 0){

            printf("\n\nZum beenden bestätigen Sie mit 8:: ");  
            scanf("%d", &int_besteatigen);  

            if(int_besteatigen == 8){

                beenden = 1;
                exit(0);

            }
        }

        else{

            return 0;
        }

    }
}