[jboss-jira] [JBoss JIRA] (WFLY-1325) Install custom default socket factories to avoid bind restrictions

[David Lloyd (JIRA)]

David Lloyd created WFLY-1325:
---------------------------------

             Summary: Install custom default socket factories to avoid bind restrictions
                 Key: WFLY-1325
                 URL: https://issues.jboss.org/browse/WFLY-1325
             Project: WildFly
          Issue Type: Enhancement
            Reporter: David Lloyd
            Priority: Minor


It would be nice if we could install a custom default socket factory to work around restrictions imposed by OpenShift and other cloud providers, regarding binding to an interface before establishing an outbound connection.

What happens is, if you use a SocketFactory to create a socket and you call the bind variant *even if you pass null* it will try to bind the socket before connecting out, and the address it passes to the bind call is restricted.

So the workaround is to install a socket factory like this one:

{code}
    static final class OpenShiftSocketFactory extends SocketFactory {
        private final SocketFactory original;

        OpenShiftSocketFactory(final SocketFactory original) {
            this.original = original;
        }

        public Socket createSocket(final String host, final int port) throws IOException {
            return original.createSocket(host, port);
        }

        public Socket createSocket(final String host, final int port, final InetAddress localHost, final int localPort) throws IOException {
            if (localPort == 0) {
                return original.createSocket(host, port);
            } else {
                return original.createSocket(host, port, localHost, localPort);
            }
        }

        public Socket createSocket(final InetAddress host, final int port) throws IOException {
            return original.createSocket(host, port);
        }

        public Socket createSocket(final InetAddress host, final int port, final InetAddress localHost, final int localPort) throws IOException {
            if (localPort == 0) {
                return original.createSocket(host, port);
            } else {
                return original.createSocket(host, port, localHost, localPort);
            }
        }
    }

{code}

...with probably more checking to ensure that localHost is 0.0.0.0 or ::0 or whatever.

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