Re: socket communication: socket doesn't connect

"Tom Serface" <>
Thu, 26 Apr 2007 07:12:46 -0700
You may find this to be a good read:


"Ananya" <> wrote in message

Also, what's the difference between WinSock.h and WinSock2.h? My socket
doesn't connect with either of them. Or should I use afxsock.h instead?

"Ananya" wrote:

I am trying to establish socket communication between my C++ and Java

I bring up the Java program from the C++ program with ShellExecEx.

Then I start in the Java program with:
int port = 3000;
int rev = 1;
InetAddress address = InetAddress.getLocalHost();
Client client = new Client(port, address, rev);
int[] ints = new int[1];
ints[0] = 1;
client.send_ints(ints, 1);
using my Java Client class.

Then I continue in my C++ program with:
int port = 3000;
Server* server = new Server(port);
using my C++ Server class.

It looks like the server gets constructed properly and the connectServer
method calls the connect method from WinSock.h, which I have included
its library WSock32.Lib is at Additional Dependences in the Input of the

Why does this connect method from WinSock.h return - 1?

Just in case, here is the constructor of my Java Client class:
public Client(int p, InetAddress address, int rev) throws IOException,
   port = p;

      sock = new Socket(address, port);
      input = new BufferedInputStream(sock.getInputStream(), BUFFSIZE);
      output = new BufferedOutputStream(sock.getOutputStream(),
   catch (IOException e)
   catch (IllegalArgumentException ie)

   buff = new byte[BUFFSIZE];
   data = new byte[BUFFSIZE];


and the constructor of my C++ Server class:
Server::Server(int p) throw (string)
   WSAData wsaData;
   if(WSAStartup(MAKEWORD(1,1),&wsaData) != 0)
      throw string("help!");

   port = p;

   if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
      throw string("help!");

   my_addr.sin_family = AF_INET;
   my_addr.sin_port = htons(port);
   my_addr.sin_addr.s_addr = INADDR_ANY;

   if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr))
      throw string("help!");

   if (listen(sockfd, BACKLOG) == -1)
      throw string("help!");

Thanks for your time looking at this!

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