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/*
* SonarQube
* Copyright (C) 2009-2025 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.process;
import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.util.Optional;
import java.util.OptionalInt;
import java.util.function.Predicate;
public interface NetworkUtils {
int getNextLoopbackAvailablePort();
OptionalInt getNextAvailablePort(String hostOrAddress);
/**
* Identifying the localhost machine
* It will try to retrieve the hostname
*
* @return "hostname"
*/
String getHostname();
/**
* Converts a text representation of an IP address or host name to
* a {@link InetAddress}.
* If text value references an IPv4 or IPv6 address, then DNS is
* not used.
*/
Optional<InetAddress> toInetAddress(String hostOrAddress);
boolean isLocal(String hostOrAddress);
boolean isLoopback(String hostOrAddress);
boolean isIpv6Address(String hostOrAddress);
/**
* Returns the machine {@link InetAddress} that matches the specified
* predicate. If multiple addresses match then a single one
* is picked in a non deterministic way.
*/
Optional<InetAddress> getLocalInetAddress(Predicate<InetAddress> predicate);
/**
* Returns a local {@link InetAddress} that is IPv4 and not
* loopback. If multiple addresses match then a single one
* is picked in a non deterministic way.
*/
default Optional<InetAddress> getLocalNonLoopbackIpv4Address() {
return getLocalInetAddress(a -> !a.isLoopbackAddress() && a instanceof Inet4Address);
}
/**
* Returns a local {@link InetAddress} that is IPv6 and not
* loopback. If multiple addresses match then a single one
* is picked in a non deterministic way.
*/
default Optional<InetAddress> getLocalNonLoopbackIpv6Address() {
return getLocalInetAddress(a -> !a.isLoopbackAddress() && a instanceof Inet6Address);
}
}
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