IPv4 socket bind using IPv6 socket on openjdk6 breaks udp send

[Steven Hartland]

----- Original Message ----- 
From: "Matthias Andree" <matthias.andree at gmx.de>
>> No I'm not its replying to the sender. 
> 
> Yes you are, check your trace: The sendto address and port are the same
> as the bound address.

This is a bug in truss it seems, Bjoern said he's gonna have a look at
it. Doesn't matter what you bind to it always reports this value in the
truss output.

>> In the java code we have:-
>> socket.send( new DatagramPacket( data, data.length,
>> src.getSocketAddress() ) );
>> Where src is the src packet. This works fine on IPv4 only machines and
>> when the jdk is told to use only IPv4 stack. So its not a problem with
>> the java code itself but could well be an issue with the
> 
> What data type is it?

All mute as the Bjoern found and fixed the issue, it was a bug in the
kernel fixed by:-
http://svnweb.freebsd.org/base?view=revision&revision=220463

>> Oops sorry cut and paste error (wrong line) heres the correct line.
>> root     java       894   20 udp4   85.236.109.212:25675  *:*
> 
> While a datagram socket, it does not match the socket()/bind() above.
> 
> An INET6-domain datagram socket would be listed as udp6 here.  Are you
> sure you're tracing the right VM and are looking at the right thread?

Again, truss isn't showing the correct results, confused me too ;-)

Possibly another bug in sockstat / netstat as well, when the socket is a
IPv6 socket bound to an IPv4 address maybe it should indicate this e.g.
udp6-4 instead of either udp4 or udp6; alternatively maybe udp6 + a IPv4
address is enough to indicate this, but that could cause confusion.

Thanks for looking at this, appreciated :)

    Regards
    Steve

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