SSL Socket connect timeout

Question

How can I configure connect timeout for SSL Sockets in Java?

For plain sockets, I can simply create new socket instance without any target endpoint using new Socket(), and then call connect(SocketAddress endpoint, int timeout) method. With SSL sockets, I cannot create new SSLSocket() and SSLSocketFactory.getDefault().createSocket() method with no endpoint throws UnsupportedOperationException with Unconnected sockets not implemented message.

Is there a way to use connect timeouts for SSL Sockets in Java, using standard java libs only?

cnicutar · Accepted Answer · 2011-04-19 11:45:40Z

9

I believe you could use your current approach of creating the Socket and then connecting it. To establish SSL over the connection you could use SSLSocketFactory.createSocket

Returns a socket layered over an existing socket connected to the named host, at the given port.

This way you get full control over the connection and then you negociate setting up SSL on top of it. Please let me know if I misread your question.

answered Apr 19, 2011 at 11:45

cnicutar

184k26 gold badges378 silver badges399 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Peter Štibraný Over a year ago

Ah, that looks like an option. I will try that. Thanks.

predi · Accepted Answer · 2014-09-08 07:40:45Z

9

With java 1.7 the following does not throw the exception stated in the question:

String host = "example.com";
int port = 12345;
int connectTimeout = 5000;
SSLSocket socket = (SSLSocket)SSLSocketFactory.getDefault().createSocket();
socket.connect(new InetSocketAddress(host, port), connectTimeout);
socket.startHandshake();

so it's business as usual.

answered Sep 8, 2014 at 7:40

predi

5,98835 silver badges66 bronze badges

Comments

Gibezynu Nu · Accepted Answer · 2019-07-22 15:06:33Z

5

Elaborating on @predi's answer, I found that I needed to use "setSoTimeout" too. Otherwise sometimes it gets stuck in the handshake (on very unstable connections):

    final int connectTimeout = 30 * 1000;
    SSLSocket socket = (SSLSocket) SSLSocketFactory.getDefault().createSocket();
    socket.setSoTimeout(connectTimeout);
    socket.connect(new InetSocketAddress(hostAddress, port), connectTimeout);
    socket.startHandshake();
    socket.setSoTimeout(0);`

answered Jul 22, 2019 at 15:06

Gibezynu Nu

3841 gold badge6 silver badges17 bronze badges

Collectives™ on Stack Overflow

SSL Socket connect timeout

3 Answers 3

1 Comment

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related