Re: [Xenomai] Xddp and socket: Address family not supported by protocol

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

On 02/06/2014 12:09 PM, Philippe Gerum wrote:
> On 02/06/2014 11:58 AM, Leopold Palomo-Avellaneda wrote:
>> Hi all,
>>
>> we are trying to develop an application using xddp protocol. We use as base,
>> the xddp-label exaample that compiles and run perfectly in our system
>> (Xenomai-2.6.3 with Linux 3.8.13).
>>
>> Our app is different from the xddp example because we have encapsulated the
>> realtime thread in a task, that it's in a library. We can run the task,called
>> from another part, and it rus.
>>
>> Our task create two sockets, one to receive from the NRT and another to send.
>> Yes, I know that we could do it in just one socket, but by design we must do
>> it in the way.
>>
>> Our main problem is when the RT task try to open the socket, the ipc
>> device isn't created. The error that appears is:"socket: Address family not
>> supported by protocol". I attach the real-time task code below.
>>
>> The xddp works, because the examples works. We have several /dev/rtpX and when
>> we run the example the /proc/xenomai/registry/rtipc/xddp/xddp-label is
>> created.
>>
>> Someone could give us some idea about what are we doing wrong?
>>
> 
> Your application is likely not wrapping POSIX symbols properly, calling 
> regular socket() instead of the Xenomai implementation. Check 
> examples/rtdm/profiles/ipc/Makefile for LDLIBS. You must have --wrap or 
> -Wl,@/some/path/posix.wrappers appearing in your link flags, for the 
> wrapping to take place properly.

See also:
https://www.xenomai.org/index.php/Porting_POSIX_applications_to_Xenomai#Compilation_flags

-- 
                                                                Gilles.