On Oct 19, 2011, at 11:45 PM, Oleg Moskalenko wrote:

> Hi
>  
> I installed the new OpenSSL version and I immediately ran into a problem with 
> DTLS: when the option SSL_OP_NO_QUERY_MTU is set, then the SSL_connect 
> command produces a segmentation fault.
Have you tried the first bug fix available at
http://sctp.fh-muenster.de/dtls-patches.html
It should address the problem. It will be included in the next release.
>  
> I am using Linux Ubuntu 11.04.
>  
> If I want to use my own discovered MTU, then I have to use that option. 
> Otherwise, the system would ignore my MTU and use whatever the IP_MTU 
> getsockopt on UDP socket returns.
>  
> Unfortunately, I am using different platforms, and MTU discovery is supported 
> in OpenSSL only on Linux platform. I need it working on FreeBSD, too, and I 
> have to discover MTU myself.
>  
> Is this a known bug ?
Yes...
>  
> By the way, are there any plans to support FreeBSD MTU discovery ?
We have a patch which adds PMTU discovery and used DTLS heartbeats for that. 
Once
the heartbeats are approved as an RFC we will contribute code for that and the
PMTU stuff.

Best regards
Michael
>  
> Thanks !
> Oleg Moskalenko
>  
>  
>  
>  

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