I added socket connection check same as IPv6_supported(). Before this fix, when IPv4 is uninstalled (called `netsh interface ipv4 uninstall`), and set property `-Djava.net.preferIPv4Stack=true`, java.net.InetAddress.PLATFORM_LOOKUP_POLICY.characteristics is always set to 1(IPv4), because IPv4_supported() always returns TRUE. After applied this fix, java.net.InetAddress.PLATFORM_LOOKUP_POLICY.characteristics is set to 2(IPv6). It looks fine that IPv4_supported() returns FALSE. Would you review this fix?
------------- Commit messages: - 8279329: Remove hardcoded IPv4 available policy on Windows Changes: https://git.openjdk.java.net/jdk/pull/7317/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7317&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8279329 Stats: 6 lines in 1 file changed: 5 ins; 0 del; 1 mod Patch: https://git.openjdk.java.net/jdk/pull/7317.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/7317/head:pull/7317 PR: https://git.openjdk.java.net/jdk/pull/7317
