java 1.4.x and 1.5.x create java.net.ServerSocket per default in AF_INET6
when inet6 interface is up. Java 1.2.2 and 1.3.1 do not.

The problem is strictly reproducible.

0. Precondition
---------------
 Please make sure that inet6 interface is up:
% ifconfig -a
lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1
        inet 127.0.0.1 netmask ff000000
eri0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
        inet 129.157.133.192 netmask ffffff00 broadcast 129.157.133.255
eri0: flags=2000841<UP,RUNNING,MULTICAST,IPv6> mtu 1500 index 2
        inet6 fe80::203:baff:fe5b:7e89/10

 If inet6 interface is not up, use:
# ifconfig eri0 inet6 plumb up


1. Testcase
-----------
 Please find attached the following files.
-rwxr-xr-x 1 tl15687 sun 343788 Feb 2 09:24 test1
-rw-r--r-- 1 tl15687 sun 988 Feb 2 09:24 test1.cc
-rw-r--r-- 1 tl15687 sun 864 Feb 2 09:24 testserver.class
-rw-r--r-- 1 tl15687 sun 417 Feb 2 09:24 testserver.java


2. Run testcase on 1.4.2_07
---------------------------
% /j2sdk1.4.2_07/bin/java -version
java version "1.4.2_07"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_07-b05)
Java HotSpot(TM) Client VM (build 1.4.2_07-b05, mixed mode)
% /j2sdk1.4.2_07/bin/java testserver &
[1] 25559
% netstat -a -f inet | grep 3300
      *.3300 *.* 0 0 49152 0 LISTEN
% netstat -a -f inet6 | grep 3300
      *.3300 *.* 0 0 49152 0 LISTEN
% ./test1&
[2] 25564
% netstat -a -f inet | grep 3300
      *.3300 *.* 0 0 49152 0 LISTEN
      *.3300 *.* 0 0 49152 0 LISTEN
% netstat -a -f inet6 | grep 3300
      *.3300 *.* 0 0 49152 0 LISTEN
% kill -HUP 25559
%
 "test1" is able to access a socket at address 3300 in family "inet".


3. Run testcase on 1.5.0
------------------------
% /jdk1.5.0_01/bin/java -version
java version "1.5.0_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_01-b08)
Java HotSpot(TM) Server VM (build 1.5.0_01-b08, mixed mode)
% /jdk1.5.0_01/bin/java testserver &
[1] 3330
% netstat -a -f inet | grep 3300
      *.3300 *.* 0 0 49152 0 LISTEN
% netstat -a -f inet6 | grep 3300
      *.3300 *.* 0 0 49152 0 LISTEN
% ./test1 &
[2] 3337
% netstat -a -f inet | grep 3300
      *.3300 *.* 0 0 49152 0 LISTEN
      *.3300 *.* 0 0 49152 0 LISTEN
% netstat -a -f inet6 | grep 3300
      *.3300 *.* 0 0 49152 0 LISTEN
% kill -HUP 3330
%
 Same behaviour as with 1.4.2_07


4. Compare behaviour w/ 1.3.1_15
--------------------------------
% /j2sdk1_3_1_15/bin/java testserver &
[1] 25584
% netstat -a -f inet | grep 3300
      *.3300 *.* 0 0 49152 0 LISTEN
% netstat -a -f inet6 | grep 3300
% ./test1&
First: bind call failure
% kill -HUP 25584
%
 "test1" is unable to access a socket at address 3300 in family "inet".

5. Compare behaviour w/ 1.2.2
-----------------------------
% /usr/java1.2/bin/java -version
java version "1.2.2"
Solaris VM (build Solaris_JDK_1.2.2_13, native threads, sunwjit)
% /usr/java1.2/bin/java testserver &
[1] 25621
% netstat -a -f inet | grep 3300
      *.3300 *.* 0 0 49152 0 LISTEN
% netstat -a -f inet6 | grep 3300
% test1
First: bind call failure
% kill -HUP 25621
%


###@###.### 2005-2-02 13:25:35 GMT