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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

/*

 * @test

 * @bug 6521014 6543428

 * @summary IOException thrown when Socket tries to bind to an local IPv6 address on SuSE Linux

 * @library /test/lib

 * @build jdk.test.lib.NetworkConfiguration

 *        jdk.test.lib.Platform

 * @run main B6521014

 */

import java.net.*;

import java.io.*;

import java.util.*;

import jdk.test.lib.NetworkConfiguration;

/*

 *

 * What this testcase is to test is a (weird) coupling through the

 * cached_scope_id field of java.net.Inet6Address. Native method

 * NET_InetAddressToSockaddr as in Linux platform will try to write

 * and read this field, therefore Inet6Address becomes 'stateful'.

 * So the coupling. Certain executive order, e.g. two methods use

 * the same Inet6Address instance as illustrated in this test case,

 * will show side effect of such coupling.

 *

 * And on Windows, NET_InetAddressToSockaddr() did not assign appropriate

 * sin6_scope_id value to sockaddr_in6 structure if there's no one coming

 * with Inet6Address instance, which caused bind exception. This test use

 * link-local address without %scope suffix, so it is also going to test

 * that.

 *

 */

public class B6521014 {

    static Inet6Address removeScope(Inet6Address addr) {

        try {

            return (Inet6Address)InetAddress.getByAddress(addr.getAddress());

        } catch (IOException e) {

            throw new UncheckedIOException(e);

        }

    }

    static Optional<Inet6Address> getLocalAddr() throws Exception {

        return NetworkConfiguration.probe()

                .ip6Addresses()

                .filter(Inet6Address::isLinkLocalAddress)

                .findFirst();

    }

    static void test1(Inet6Address sin) throws Exception {

        try (ServerSocket ssock = createBoundServer(sin);

             Socket sock = new Socket()) {

            int port = ssock.getLocalPort();

            sock.connect(new InetSocketAddress(sin, port), 100);

        } catch (SocketTimeoutException e) {

            // time out exception is okay

            System.out.println("timed out when connecting.");

        }

    }

    static void test2(Inet6Address sin) throws Exception {

        try (ServerSocket ssock = createBoundServer(sin);

             Socket sock = new Socket()) {

            int port = ssock.getLocalPort();

            ssock.setSoTimeout(100);

            sock.bind(new InetSocketAddress(sin, 0));

            sock.connect(new InetSocketAddress(sin, port), 100);

        } catch (SocketTimeoutException expected) {

            // time out exception is okay

            System.out.println("timed out when connecting.");

        }

    }

    static ServerSocket createBoundServer(Inet6Address sin) throws IOException {

        ServerSocket ss = new ServerSocket();

        InetSocketAddress address = new InetSocketAddress(sin, 0);

        ss.bind(address);

        return ss;

    }

    public static void main(String[] args) throws Exception {

        Optional<Inet6Address> oaddr = getLocalAddr();

        if (!oaddr.isPresent()) {

            System.out.println("Cannot find a link-local address.");

            return;

        }

        Inet6Address addr = oaddr.get();

        System.out.println("Using " + addr);

        test1(addr);

        test2(addr);

    }

}