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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.InetAddress;
import java.net.UnknownHostException;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Optional;
import java.util.Set;
import org.hamcrest.CoreMatchers;
import org.junit.jupiter.api.Test;
import static org.apache.commons.lang3.RandomStringUtils.secure;
import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.Assume.assumeThat;
class NetworkUtilsImplTest {
public static final String PREFER_IPV_6_ADDRESSES = "java.net.preferIPv6Addresses";
private final NetworkUtilsImpl underTest = new NetworkUtilsImpl();
@Test
void getNextAvailablePort_returns_a_port() throws Exception {
String localhost = InetAddress.getLocalHost().getHostName();
int port = underTest.getNextAvailablePort(localhost).getAsInt();
assertThat(port)
.isGreaterThan(1_023)
.isLessThanOrEqualTo(65_535);
}
@Test
void getNextAvailablePort_does_not_return_twice_the_same_port() throws Exception {
String localhost = InetAddress.getLocalHost().getHostName();
Set<Integer> ports = new HashSet<>(Arrays.asList(
underTest.getNextAvailablePort(localhost).getAsInt(),
underTest.getNextAvailablePort(localhost).getAsInt(),
underTest.getNextAvailablePort(localhost).getAsInt()));
assertThat(ports).hasSize(3);
}
@Test
void getLocalNonLoopbackIpv4Address_returns_a_valid_local_and_non_loopback_ipv4() {
Optional<InetAddress> address = underTest.getLocalNonLoopbackIpv4Address();
// address is empty on offline builds
assumeThat(address.isPresent(), CoreMatchers.is(true));
assertThat(address.get()).isInstanceOf(Inet4Address.class);
assertThat(address.get().isLoopbackAddress()).isFalse();
}
@Test
void getHostname_returns_hostname_of_localhost_otherwise_a_constant() {
try {
InetAddress localHost = InetAddress.getLocalHost();
assertThat(underTest.getHostname()).isEqualTo(localHost.getHostName());
} catch (UnknownHostException e) {
// no localhost on host running the UT
assertThat(underTest.getHostname()).isEqualTo("unresolved hostname");
}
}
@Test
void getLocalInetAddress_filters_local_addresses() {
InetAddress address = underTest.getLocalInetAddress(InetAddress::isLoopbackAddress).get();
assertThat(address.isLoopbackAddress()).isTrue();
}
@Test
void getLocalInetAddress_returns_empty_if_no_local_addresses_match() {
Optional<InetAddress> address = underTest.getLocalInetAddress(a -> false);
assertThat(address).isEmpty();
}
@Test
void toInetAddress_supports_host_names() {
assertThat(underTest.toInetAddress("localhost")).isNotEmpty();
// do not test values that require DNS calls. Build must support offline mode.
}
@Test
void toInetAddress_supports_ipv4() {
assertThat(underTest.toInetAddress("1.2.3.4")).isNotEmpty();
}
@Test
void toInetAddress_supports_ipv6() {
assertThat(underTest.toInetAddress("2a01:e34:ef1f:dbb0:c2f6:a978:c5c0:9ccb")).isNotEmpty();
assertThat(underTest.toInetAddress("[2a01:e34:ef1f:dbb0:c2f6:a978:c5c0:9ccb]")).isNotEmpty();
}
@Test
void toInetAddress_returns_empty_on_unvalid_IP_and_hostname() {
assertThat(underTest.toInetAddress(secure().nextAlphabetic(32))).isEmpty();
}
@Test
void isLoopback_returns_true_on_loopback_address_or_host() {
InetAddress loopback = InetAddress.getLoopbackAddress();
assertThat(underTest.isLoopback(loopback.getHostAddress())).isTrue();
assertThat(underTest.isLoopback(loopback.getHostName())).isTrue();
}
@Test
void isLoopback_returns_true_on_localhost_address_or_host_if_loopback() {
try {
InetAddress localHost = InetAddress.getLocalHost();
boolean isLoopback = localHost.isLoopbackAddress();
assertThat(underTest.isLoopback(localHost.getHostAddress())).isEqualTo(isLoopback);
assertThat(underTest.isLoopback(localHost.getHostName())).isEqualTo(isLoopback);
} catch (UnknownHostException e) {
// ignore, host running the test has no localhost
}
}
@Test
void isLocal_returns_true_on_loopback_address_or_host() {
InetAddress loopback = InetAddress.getLoopbackAddress();
assertThat(underTest.isLocal(loopback.getHostAddress())).isTrue();
assertThat(underTest.isLocal(loopback.getHostName())).isTrue();
}
@Test
void isLocal_returns_true_on_localhost_address_or_host() {
try {
InetAddress localHost = InetAddress.getLocalHost();
assertThat(underTest.isLocal(localHost.getHostAddress())).isTrue();
assertThat(underTest.isLocal(localHost.getHostName())).isTrue();
} catch (UnknownHostException e) {
// ignore, host running the test has no localhost
}
}
@Test
void isIpv6Address_returnsAccordingToAddressAndIPv6Preference() {
System.setProperty(PREFER_IPV_6_ADDRESSES, "false");
assertThat(underTest.isIpv6Address("2001:db8:3::91")).isTrue();
assertThat(underTest.isIpv6Address("192.168.1.1")).isFalse();
assertThat(underTest.isIpv6Address("")).isFalse();
System.setProperty(PREFER_IPV_6_ADDRESSES, "true");
assertThat(underTest.isIpv6Address("2001:db8:3::91")).isTrue();
assertThat(underTest.isIpv6Address("192.168.1.1")).isFalse();
assertThat(underTest.isIpv6Address("")).isTrue();
}
}
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