Heads up --- Thinking about UDP and tunneling

[Randall Stewart]

On Dec 12, 2008, at 12:19 PM, Max Laier wrote:

> On Friday 12 December 2008 13:56:38 Randall Stewart wrote:
>> On Dec 11, 2008, at 8:12 AM, Max Laier wrote:
>>> On Thursday 11 December 2008 13:50:39 Randall Stewart wrote:
> ...
>> Another thing... kinda weird.. when I have this thing working with
>> SCTP and I
>> let the SCTP stack try to initialize the socket right away.. I get  
>> bogus
>> results. The port is actually binding.. but yet it cant be sent to.  
>> If I
>> unbind i.e. close the socket that got created.. then do a sysctl to  
>> re-
>> add
>> the same port.. all works fine.
>>
>> For now I am going to make SCTP NOT do this.. and have to add it to  
>> the
>> sysctl's in /etc/sysctl.conf to add UDP tunneling.
>>
>> Only other solution would be a timer in the transport after startup  
>> to
>> do this binding...
>
> You can probably do a SYSINIT in SI_SUB_PROTO_DOMAIN around the  
> middle and you
> should be golden.  If it turns out that this is not late enough you  
> can check
> sys/kernel.h for later SI_SUBs that might be fitting.

Hmm, thats a way to go.. but for now I don't mind leaving it default
to "off" and have to have someone configure it on in there
/etc/sysctl.conf

That way its on only when you WANT to allow UDP tunneling :-)

R

>
>
>> I was wondering if I would see a race in the protocol stack
>> initialization.. basically
>> my guess is SCTP initializes ahead of UDP.. so its actually a  
>> wonder I
>> did not crash ;-D
>
> -- 
> /"\  Best regards,                      | mlaier at freebsd.org
> \ /  Max Laier                          | ICQ #67774661
> X   http://pf4freebsd.love2party.net/  | mlaier at EFnet
> / \  ASCII Ribbon Campaign              | Against HTML Mail and News
>

------------------------------
Randall Stewart
803-317-4952 (cell)
803-345-0391(direct)