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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.zookeeper.common;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.InetSocketAddress;
/**
* This class contains common utilities for netstuff. Like printing IPv6 literals correctly
*/
public class NetUtils {
// Note: Changed from original to use hostname from InetSocketAddress if there exists one
public static String formatInetAddr(InetSocketAddress addr) {
String hostName = addr.getHostName();
if (hostName != null) {
return String.format("%s:%s", hostName, addr.getPort());
}
InetAddress ia = addr.getAddress();
if (ia == null) {
return String.format("%s:%s", addr.getHostString(), addr.getPort());
}
if (ia instanceof Inet6Address) {
return String.format("[%s]:%s", ia.getHostAddress(), addr.getPort());
} else {
return String.format("%s:%s", ia.getHostAddress(), addr.getPort());
}
}
/**
* Separates host and port from given host port string if host port string is enclosed
* within square bracket.
*
* @param hostPort host port string
* @return String[]{host, port} if host port string is host:port
* or String[] {host, port:port} if host port string is host:port:port
* or String[] {host} if host port string is host
* or String[]{} if not a ipv6 host port string.
*/
public static String[] getIPV6HostAndPort(String hostPort) {
if (hostPort.startsWith("[")) {
int i = hostPort.lastIndexOf(']');
if (i < 0) {
throw new IllegalArgumentException(
hostPort + " starts with '[' but has no matching ']'");
}
String host = hostPort.substring(1, i);
if (host.isEmpty()) {
throw new IllegalArgumentException(host + " is empty.");
}
if (hostPort.length() > i + 1) {
return getHostPort(hostPort, i, host);
}
return new String[] { host };
} else {
//Not an IPV6 host port string
return new String[] {};
}
}
private static String[] getHostPort(String hostPort, int indexOfClosingBracket, String host) {
// [127::1]:2181 , check separator : exits
if (hostPort.charAt(indexOfClosingBracket + 1) != ':') {
throw new IllegalArgumentException(hostPort + " does not have : after ]");
}
// [127::1]: scenario
if (indexOfClosingBracket + 2 == hostPort.length()) {
throw new IllegalArgumentException(hostPort + " doesn't have a port after colon.");
}
//do not include
String port = hostPort.substring(indexOfClosingBracket + 2);
return new String[] { host, port };
}
}
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