Re: socket communication: socket doesn't connect

"M. Shoaib Surya" <>
Thu, 26 Apr 2007 13:36:07 +0500
afxsock.h contains the definitions of MFC wrapper classes for sockets (e.g.
CSocket class). It uses and hence includes winsock.h itself. So, if you are
using these MFC classes, then you need to include afxsock.h

Besides this, however, you should use winsock2.h (take note of the "2").

- Shoaib

"Ananya" <> wrote in message

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 (and
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(), BUFFSIZE);
  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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