public static InetAddress getDefaultRoute(Class<? extends InetAddress> type) {
InetAddress target = null;
ProtocolFamily family = type == Inet6Address.class ? StandardProtocolFamily.INET6 : StandardProtocolFamily.INET;
try(DatagramChannel chan=DatagramChannel.open(family)) {
if(type == Inet4Address.class)
target = InetAddress.getByAddress(new byte[] {8,8,8,8});
if(type == Inet6Address.class)
target = InetAddress.getByName("2001:4860:4860::8888");
chan.connect(new InetSocketAddress(target,63));
InetSocketAddress soa = (InetSocketAddress) chan.getLocalAddress();
InetAddress local = soa.getAddress();
if(type.isInstance(local) && !local.isAnyLocalAddress())
return local;
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
AddressUtils.java 文件源码
java
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