[jira] Commented: (HARMONY-73) java.net.InetAddress.getLocalHost() returns wrong host name for loopback address
[
http://issues.apache.org/jira/browse/HARMONY-73?page=comments#action_12368875 ]
Svetlana Samoilenko commented on HARMONY-73:
Tim/Paulex,
thanks, bug is not reproducible with latest sources.
java.net.InetAddress.getLocalHost() returns wrong host name for loopback
address
-
Key: HARMONY-73
URL: http://issues.apache.org/jira/browse/HARMONY-73
Project: Harmony
Type: Bug
Components: Classlib
Reporter: Svetlana Samoilenko
Priority: Minor
Attachments: InetAddress.patch
J2se 1.4.2 and 5.0 specifications for java.net.InetAddress.getLocalHost()
read, that if there is a security manager, its checkConnect method is called
with the local host name and -1 as its arguments to see if the operation is
allowed.
If the operation is not allowed, an InetAddress representing the loopback
address is returned as hostname/hostaddress (as followed from toString()
specification).
The test listed below shows that the returned loopback address has wrong
hostname, 127.0.0.1 instead of loopback.
Inet_SecurityManager class is called twice and therefore host name is
substituted with hostaddress address.
Code to reproduce:
import java.net.*;
public class test2 {
public static void main(String[] args) {
try {
System.setSecurityManager(new Inet_SecurityManager());
System.out.println(Loopback address = +
InetAddress.getLocalHost());
} catch (Exception e){
System.out.println(Unexpected exception = + e);
};
}
}
class Inet_SecurityManager extends SecurityManager {
public void checkConnect(String host, int port) {
super.checkConnect(host,port);
throw new SecurityException();
}
}
Steps to Reproduce:
1. Build Harmony (check-out on 2006-01-30) j2se subset as described in
README.txt.
2. Compile test2.java using BEA 1.4 javac
javac -d . test2.java
3. Run java using compatible VM (J9)
java -showversion test2
Output:
C:\tmpC:\jrockit-j2sdk1.4.2_04\bin\java.exe -showversion test2
java version 1.4.2_04
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
BEA WebLogic JRockit(TM) 1.4.2_04 JVM (build
ari-31788-20040616-1132-win-ia32, Native Threads, GC strategy: parallel)
Inet_SecurityManager :host= nswssamoil1
Inet_SecurityManager :port= -1
Loopback address = localhost/127.0.0.1
C:\tmpC:\harmony\trunk\deploy\jre\bin\java -showversion test2
(c) Copyright 1991, 2005 The Apache Software Foundation or its licensors, as
applicable.
Inet_SecurityManager :host= nswssamoil1
Inet_SecurityManager :port= -1
Inet_SecurityManager :host= localhost
Inet_SecurityManager :port= -1
Loopback address = 127.0.0.1/127.0.0.1
Suggested junit test case:
InetAddressTest.java
-
import java.net.*;
import junit.framework.*;
public class InetAddressTest extends TestCase {
public static void main(String[] args) {
junit.textui.TestRunner.run(InetAddress.class);
}
public void test_getLocalHost() {
try{
System.setSecurityManager(new Inet_SecurityManager());
String hostname=InetAddress.getLocalHost().getHostName();
assertEquals(localhost, hostname);
} catch (Exception e){
fail(Unexpected exception = + e);
};
}
}
class Inet_SecurityManager extends SecurityManager {
public void checkConnect(String host, int port) {
super.checkConnect(host,port);
throw new SecurityException();
}
}
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[jira] Commented: (HARMONY-73) java.net.InetAddress.getLocalHost() returns wrong host name for loopback address
[
http://issues.apache.org/jira/browse/HARMONY-73?page=comments#action_12365843 ]
Paulex Yang commented on HARMONY-73:
Further study shows that the prior patch is not needed, in fact, my proposed
fix for issue 84 (http://issues.apache.org/jira/browse/HARMONY-84) is enough to
fix this issue as by product.
java.net.InetAddress.getLocalHost() returns wrong host name for loopback
address
-
Key: HARMONY-73
URL: http://issues.apache.org/jira/browse/HARMONY-73
Project: Harmony
Type: Bug
Components: Classlib
Reporter: Svetlana Samoilenko
Priority: Minor
Attachments: InetAddress.patch
J2se 1.4.2 and 5.0 specifications for java.net.InetAddress.getLocalHost()
read, that if there is a security manager, its checkConnect method is called
with the local host name and -1 as its arguments to see if the operation is
allowed.
If the operation is not allowed, an InetAddress representing the loopback
address is returned as hostname/hostaddress (as followed from toString()
specification).
The test listed below shows that the returned loopback address has wrong
hostname, 127.0.0.1 instead of loopback.
Inet_SecurityManager class is called twice and therefore host name is
substituted with hostaddress address.
Code to reproduce:
import java.net.*;
public class test2 {
public static void main(String[] args) {
try {
System.setSecurityManager(new Inet_SecurityManager());
System.out.println(Loopback address = +
InetAddress.getLocalHost());
} catch (Exception e){
System.out.println(Unexpected exception = + e);
};
}
}
class Inet_SecurityManager extends SecurityManager {
public void checkConnect(String host, int port) {
super.checkConnect(host,port);
throw new SecurityException();
}
}
Steps to Reproduce:
1. Build Harmony (check-out on 2006-01-30) j2se subset as described in
README.txt.
2. Compile test2.java using BEA 1.4 javac
javac -d . test2.java
3. Run java using compatible VM (J9)
java -showversion test2
Output:
C:\tmpC:\jrockit-j2sdk1.4.2_04\bin\java.exe -showversion test2
java version 1.4.2_04
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
BEA WebLogic JRockit(TM) 1.4.2_04 JVM (build
ari-31788-20040616-1132-win-ia32, Native Threads, GC strategy: parallel)
Inet_SecurityManager :host= nswssamoil1
Inet_SecurityManager :port= -1
Loopback address = localhost/127.0.0.1
C:\tmpC:\harmony\trunk\deploy\jre\bin\java -showversion test2
(c) Copyright 1991, 2005 The Apache Software Foundation or its licensors, as
applicable.
Inet_SecurityManager :host= nswssamoil1
Inet_SecurityManager :port= -1
Inet_SecurityManager :host= localhost
Inet_SecurityManager :port= -1
Loopback address = 127.0.0.1/127.0.0.1
Suggested junit test case:
InetAddressTest.java
-
import java.net.*;
import junit.framework.*;
public class InetAddressTest extends TestCase {
public static void main(String[] args) {
junit.textui.TestRunner.run(InetAddress.class);
}
public void test_getLocalHost() {
try{
System.setSecurityManager(new Inet_SecurityManager());
String hostname=InetAddress.getLocalHost().getHostName();
assertEquals(localhost, hostname);
} catch (Exception e){
fail(Unexpected exception = + e);
};
}
}
class Inet_SecurityManager extends SecurityManager {
public void checkConnect(String host, int port) {
super.checkConnect(host,port);
throw new SecurityException();
}
}
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