problem beim versenden an alle clients

[O.G.Wrapper]

Hallo Leute,

ich will einen kleinen Server schreiben der Daten an alle Clients schickt über select. Nur wenn ich mit FD_ISSET teste komme ich nie in den zweig indem ich daten versenden kann. Ich hab wohl etwas übersehen, kann da jmd. mal draufkucken

gruss der gangster wrapper

Server

fd_set master;    // master file descriptor list
  fd_set read_fds;  // temp file descriptor list for select()
  fd_set write_fds; // temp file descriptor list for select()
  struct sockaddr_in myaddr;      // server address
  struct sockaddr_in remoteaddr;  // client address
  int fdmax;         // maximum file descriptor number
  int listener;      // listening socket descriptor
  int newfd;         // newly accept()ed socket descriptor
  int yes=1;         // for setsockopt() SO_REUSEADDR, below
  socklen_t addrlen;
  int i;

  FD_ZERO(&master);     // clear the master and temp sets
  FD_ZERO(&write_fds);
  FD_ZERO(&read_fds);

  // get the listener
  if ((listener = socket(AF_INET, SOCK_STREAM, 0)) == -1) 
    {
      perror("socket");
      exit(1);
    }

  // lose the pesky "address already in use" error message
  if (setsockopt(listener, SOL_SOCKET, SO_REUSEADDR, &yes,
		 sizeof(int)) == -1) 
    {
      perror("setsockopt");
      exit(1);
    }
  // bind
  myaddr.sin_family = AF_INET;
  myaddr.sin_addr.s_addr = INADDR_ANY;
  myaddr.sin_port = htons(PORT);
  memset(&(myaddr.sin_zero), '\0', 8);
  if (bind(listener, (struct sockaddr *)&myaddr, sizeof(myaddr)) == -1) 
    {
      perror("bind");
      exit(1);
    }

  // listen
  if (listen(listener, 10) == -1) 
    {
      perror("listen");
      exit(1);
    }

  // add the listener to the master set
  FD_SET(listener, &master);

  // keep track of the biggest file descriptor
  fdmax = listener; // so far, it's this one

  // main loop
  while(1) 
    {
      read_fds = master; // copy it
      if (select(fdmax+1, &read_fds, &write_fds, NULL, NULL) == -1) 
	{
	  perror("select");
	  exit(1);
	}

      // run through the existing connections looking for data to read
      for(i = 0; i <= fdmax; i++) 
	{
	  if (FD_ISSET(i, &read_fds)) 
	    { // new client connection
	      if (i == listener) 
		{
		  // handle new connections
		  addrlen = sizeof(remoteaddr);
		  if ((newfd = accept(listener, (struct sockaddr *)&remoteaddr, &addrlen)) == -1) 
		    {
		      perror("accept");
		    } 
		  else 
		    {
		      FD_SET(newfd, &master); // add to master set
		      if (newfd > fdmax) 
			{     // keep track of the maximum
			  fdmax = newfd;
			}
		      cout << "selectserver: new connection from " << inet_ntoa(remoteaddr.sin_addr) 
			   << " on socket " << newfd << endl;
		    }
		}
	    }
	  if(FD_ISSET(i, &write_fds))
	    {// stream data to clients
	      if(i != listener)  //except server
		{
		  char text[] = "hello client\n";
		  int len;
		  // handle data from a client
		  if ( send(i, text, 14, 0) != -1)
		    {
		      cout << "error can't send on fd " << i << endl;
		      cout << "actually send data " << len << endl;
		    }
		}
	    } 
	}
    }

client

int sockfd, numbytes;  
    char buf[MAXDATASIZE];
    struct hostent *he;
    struct sockaddr_in their_addr; // connector's address information 

    if (argc != 2) {
        fprintf(stderr,"usage: client hostname\n");
        exit(1);
    }

    if ((he=gethostbyname(argv[1])) == NULL) {  // get the host info 
        herror("gethostbyname");
        exit(1);
    }

    if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
        perror("socket");
        exit(1);
    }

    their_addr.sin_family = AF_INET;    // host byte order 
    their_addr.sin_port = htons(PORT);  // short, network byte order 
    their_addr.sin_addr = *((struct in_addr *)he->h_addr);
    memset(their_addr.sin_zero, '\0', sizeof their_addr.sin_zero);

    if (connect(sockfd, (struct sockaddr *)&their_addr,
                                          sizeof their_addr) == -1) {
        perror("connect");
        exit(1);
    }

    if ((numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) == -1) {
        perror("recv");
        exit(1);
    }

    buf[numbytes] = '\0';

    printf("Received: %s",buf);

    close(sockfd);

    return 0;

[O.G.Wrapper]

habs selber geloest