[Mono-list] Listen on same port ipv4 and ipv6

[J Decker]

On Fri, Dec 11, 2015 at 1:56 PM, J Decker <d3ck0r at gmail.com> wrote:
> On Fri, Dec 11, 2015 at 1:50 PM, J Decker <d3ck0r at gmail.com> wrote:
>> (First let me vent a little and say I LOVE all the consistency in
>> network libraries; in MS.NET closing a IPV6 TcpClient sets Client to
>> null, whereas IPV4 TcpCLient only disposes the object)
>>
>> I found this old message with no responses..
>>
>> http://lists.ximian.com/pipermail/mono-list/2014-May/050905.html
>>
>> I want to listen at the same port address at 0.0.0.0 and :: (ipv4 and
>> 6 address respectively)
>>
>> in C I would open two listeners.  But I think maybe the .NET runtime
>> is pre-checking if that port is already used in some internal list of
>> sockets before attemping to open it in reality.
>>
>> in C# I will have to do the same thing, since connecting to the v6
>> address with only the v4 listener at 0.0.0.0 listening fails to
>> connect and times out.
>>
>> On Windows I have to, and it works; but again with Mono on Linux it
>> doesn't work.
>
> This is the code that fails.
>
> internal GameServer()
> {
> byte[] raw_ipv4 = { 0, 0, 0, 0 };
> IPAddress addr = new IPAddress( raw_ipv4 );
> listener = new TcpListener( addr, Settings.Read( "Server Port",
> GameServer.serving_port ) );
> listener.Start();
> byte[] raw_ipv6 = { 0,0,0,0
> ,0, 0, 0, 0
> ,0, 0, 0, 0
> ,0, 0, 0, 0 };
> IPAddress addr_v6 = new IPAddress( raw_ipv6 );
> listener_v6 = new TcpListener( addr_v6, Settings.Read( "Server Port",
> GameServer.serving_port ) );
> listener_v6.Start(); /* Exception - EADDRINUSE ; even though it's not
> and needs to be opened */
> }

So decided to get ambitious and get git source and try to build...
I Don't see an option to build without 'acceptance-tests'

so instead I get

make[2]: Entering directory '/home/d3x0r/addons/srcpit/mono/acceptance-tests'
  File "versions.py", line 11
    print "Not found"
                    ^
SyntaxError: Missing parentheses in call to 'print'
  File "versions.py", line 11
    print "Not found"
                    ^
SyntaxError: Missing parentheses in call to 'print'
  File "versions.py", line 11
    print "Not found"
                    ^
SyntaxError: Missing parentheses in call to 'print'
  File "versions.py", line 11
    print "Not found"
(repeated several more times)

added parens to all print statements and no more issues; though that
was also the last thing; maybe it wasn't an error stopping the
build....