228 lines
9.7 KiB
Java
228 lines
9.7 KiB
Java
/*
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* Copyright (c) 2016, 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @bug 8134577
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* @summary Test the internal NameService implementation which is enabled via
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* the system property jdk.net.hosts.file. This property specifies
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* a file name that contains address host mappings, similar to those in
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* /etc/hosts file.
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* @library /test/lib
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* @build jdk.test.lib.net.IPSupport
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* @run main/othervm -Djdk.net.hosts.file=TestHosts -Dsun.net.inetaddr.ttl=0
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* InternalNameServiceTest
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*/
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import java.io.BufferedWriter;
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import java.io.FileWriter;
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import java.io.PrintWriter;
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import java.net.InetAddress;
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import java.net.UnknownHostException;
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import java.util.Arrays;
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import jdk.test.lib.net.IPSupport;
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public class InternalNameServiceTest {
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static final String HOSTS_FILE_NAME = System.getProperty("jdk.net.hosts.file");
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public static void main(String args[]) throws Exception {
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testHostToIPAddressMappings(HOSTS_FILE_NAME);
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testIpAddressToHostNameMappings(HOSTS_FILE_NAME);
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}
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private static void testHostToIPAddressMappings(String hostsFileName)
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throws Exception, UnknownHostException {
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System.out.println(" TEST HOST TO IP ADDRESS MAPPINGS ");
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InetAddress testAddress;
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byte[] retrievedIpAddr;
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byte[] expectedIpAddr1 = { 1, 2, 3, 4 };
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byte[] expectedIpAddr2 = { 5, 6, 7, 8 };
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byte[] expectedIpAddrIpv6_1 = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1};
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// hosts file with
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// # test hosts file for internal NameService
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// 1.2.3.4 host.sample-domain
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// 5.6.7.8 host1.sample-domain
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// 1.2.3.4 host2.sample-domain # this is a comment
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// host3.sample-domain # no ip address
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// host4.sample-domain # space as ip address
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// host5.sample-domain # double space as ip address
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// add comment to hosts file
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addMappingToHostsFile("test hosts file for internal NameService ", "#", hostsFileName,
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false);
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addMappingToHostsFile("host.sample-domain", "1.2.3.4", hostsFileName,
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true);
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testAddress = InetAddress.getByName("host.sample-domain");
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retrievedIpAddr = testAddress.getAddress();
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if (!Arrays.equals(retrievedIpAddr, expectedIpAddr1)) {
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throw new RuntimeException(
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"retrievedIpAddr not equal to expectedipAddr");
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}
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addMappingToHostsFile("host1.sample-domain", "5.6.7.8", hostsFileName,
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true);
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addMappingToHostsFile("host2.sample-domain", "1.2.3.4", hostsFileName,
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true);
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testAddress = InetAddress.getByName("host1.sample-domain");
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retrievedIpAddr = testAddress.getAddress();
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if (!Arrays.equals(retrievedIpAddr, expectedIpAddr2)) {
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throw new RuntimeException(
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"retrievedIpAddr not equal to expectedIpAddr");
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}
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testAddress = InetAddress.getByName("host2.sample-domain");
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retrievedIpAddr = testAddress.getAddress();
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if (!Arrays.equals(retrievedIpAddr, expectedIpAddr1)) {
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throw new RuntimeException(
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"retrievedIpAddr not equal to expectedIpAddr");
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}
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try {
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addMappingToHostsFile("host3.sample-domain", "", hostsFileName,
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true);
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testAddress = InetAddress.getByName("host3.sample-domain");
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throw new RuntimeException(
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"Expected UnknownHostException not thrown");
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} catch (UnknownHostException uhEx) {
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System.out.println("UnknownHostException as expected for host host3.sample-domain");
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}
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try {
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addMappingToHostsFile("host4.sample-domain", " ", hostsFileName,
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true);
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testAddress = InetAddress.getByName("host4.sample-domain");
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throw new RuntimeException(
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"Expected UnknownHostException not thrown");
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} catch (UnknownHostException uhEx) {
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System.out.println("UnknownHostException as expected for host host4.sample-domain");
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}
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try {
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addMappingToHostsFile("host5.sample-domain", " ", hostsFileName,
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true);
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testAddress = InetAddress.getByName("host4.sample-domain");
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throw new RuntimeException(
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"Expected UnknownHostException not thrown");
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} catch (UnknownHostException uhEx) {
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System.out.println("UnknownHostException as expected for host host5.sample-domain");
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}
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// IPV6 tests
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if (IPSupport.hasIPv6()) {
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addMappingToHostsFile("host-ipv6.sample-domain", "::1", hostsFileName, true);
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testAddress = InetAddress.getByName("host-ipv6.sample-domain");
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retrievedIpAddr = testAddress.getAddress();
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if (!Arrays.equals(retrievedIpAddr, expectedIpAddrIpv6_1)) {
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System.out.println("retrieved ipv6 addr == " + Arrays.toString(retrievedIpAddr));
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System.out.println("expected ipv6 addr == " + Arrays.toString(expectedIpAddrIpv6_1));
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throw new RuntimeException(
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"retrieved IPV6 Addr not equal to expected IPV6 Addr");
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}
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}
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}
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private static void testIpAddressToHostNameMappings(String hostsFileName)
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throws Exception {
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System.out.println(" TEST IP ADDRESS TO HOST MAPPINGS ");
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InetAddress testAddress;
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String retrievedHost;
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String expectedHost = "testHost.testDomain";
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byte[] testHostIpAddr = { 10, 2, 3, 4 };
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byte[] testHostIpAddr2 = { 10, 5, 6, 7 };
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byte[] testHostIpAddr3 = { 10, 8, 9, 10 };
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byte[] testHostIpAddr4 = { 10, 8, 9, 11 };
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// add comment to hosts file
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addMappingToHostsFile("test hosts file for internal NameService ", "#", hostsFileName,
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false);
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addMappingToHostsFile("testHost.testDomain", "10.2.3.4", hostsFileName,
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true);
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testAddress = InetAddress.getByAddress(testHostIpAddr);
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System.out.println("******* testAddress == " + testAddress);
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retrievedHost = testAddress.getHostName();
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if (!expectedHost.equals(retrievedHost)) {
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throw new RuntimeException(
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"retrieved host name not equal to expected host name");
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}
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addMappingToHostsFile("testHost.testDomain", "10.5.6.7", hostsFileName,
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true);
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testAddress = InetAddress.getByAddress(testHostIpAddr2);
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System.out.println("******* testAddress == " + testAddress);
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retrievedHost = testAddress.getHostName();
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System.out.println("******* retrievedHost == " + retrievedHost);
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if (!expectedHost.equals(retrievedHost)) {
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throw new RuntimeException("retrieved host name " + retrievedHost
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+ " not equal to expected host name" + expectedHost);
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}
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testAddress = InetAddress.getByAddress(testHostIpAddr4);
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System.out.println("******* testAddress == " + testAddress);
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if ("10.8.9.11".equalsIgnoreCase(testAddress.getCanonicalHostName())) {
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System.out.println("addr = " + addrToString(testHostIpAddr4)
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+ " resolve to a host address as expected");
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} else {
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System.out.println("addr = " + addrToString(testHostIpAddr4)
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+ " does not resolve as expected, testAddress == " + testAddress.getCanonicalHostName());
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throw new RuntimeException("problem with resolving "
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+ addrToString(testHostIpAddr4));
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}
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try {
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addMappingToHostsFile("", "10.8.9.10", hostsFileName, true);
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testAddress = InetAddress.getByAddress(testHostIpAddr3);
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System.out.println("******* testAddress == " + testAddress);
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retrievedHost = testAddress.getCanonicalHostName();
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} catch (Throwable t) {
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throw new RuntimeException("problem with resolving "
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+ addrToString(testHostIpAddr3));
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}
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}
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private static String addrToString(byte addr[]) {
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return Byte.toString(addr[0]) + "." + Byte.toString(addr[1]) + "."
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+ Byte.toString(addr[2]) + "." + Byte.toString(addr[3]);
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}
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private static void addMappingToHostsFile( String host,
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String addr,
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String hostsFileName,
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boolean append)
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throws Exception {
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String mapping = addr + " " + host;
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try (PrintWriter hfPWriter = new PrintWriter(new BufferedWriter(
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new FileWriter(hostsFileName, append)))) {
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hfPWriter.println(mapping);
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}
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}
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}
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