#include <sys/types.h>          /* man 2 socket */
#include <sys/socket.h>

#include <netinet/in.h>         /* man 2 bind   */
#include <unistd.h>             /* man 2 close  */

int main(int argc, char** argv){
    int MasterSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    struct sockaddr_in SockAddr;
    SockAddr.sin_family = AF_INET;
    SockAddr.sin_port = htons(12345);
    SockAddr.sin_addr.s_addr = htonl(INADDR_ANY);
    bind(MasterSocket, (struct sockaddr *)(&SockAddr), sizeof(SockAddr));

    listen(MasterSocket, SOMAXCONN);

    while(1){

        int SlaveSocket = accept(MasterSocket, 0 , 0);

        int Buffer[5] = {0,0,0 ,0, 0};
        recv(SlaveSocket, Buffer, 4, MSG_NOSIGNAL);
        send(SlaveSocket, Buffer, 4, MSG_NOSIGNAL);

        shutdown(SlaveSocket, SHUT_RDWR);
        close(SlaveSocket);

        printf("%p\n", Buffer);
        return 0;
    }
}