[Xenomai] rtdm_socket() error -97 for sending UDP or RAW packets

[Xenomai] rtdm_socket() error -97 for sending UDP or RAW packets

[Umair Ali]

Hello there,

I am working to make a module which will uses the Rtnet module to send the UDP or RAW pakets. My aim is to use the interface 'rteth0' in kernel space same like in userspace. Therefore I think I should create the socket and then using the created socket link the interface rteth0 with it. But when I use the function 'rtdm_socket(PF_INET, SOCK_RAW,0)' or 'rtdm_socket(PF_PACKET, SOCK_RAW,0)' or 'rtdm_socket(PF_INET, SOCK_DGRAM,0)' or anything with available options i.e also with sock_stream. I got the error -97. Which I have looked in google means the family of protocol is not supported. Please tell me if it is possible to send the UDP packets from the kernel space using interface rteth0 and socket or not. Can u guide me how I can solve the error -97. Thanks in advance

Regards
Ali

Re: [Xenomai] rtdm_socket() error -97 for sending UDP or RAW packets

[Gilles Chanteperdrix]

On Fri, Apr 29, 2016 at 01:45:53PM +0000, Umair Ali wrote:
> Hello there,
> 
> I am working to make a module which will uses the Rtnet module to
> send the UDP or RAW pakets. My aim is to use the interface
> 'rteth0' in kernel space same like in userspace. Therefore I think
> I should create the socket and then using the created socket link
> the interface rteth0 with it. But when I use the function
> 'rtdm_socket(PF_INET, SOCK_RAW,0)' or 'rtdm_socket(PF_PACKET,
> SOCK_RAW,0)' or 'rtdm_socket(PF_INET, SOCK_DGRAM,0)' or anything
> with available options i.e also with sock_stream. I got the error
> -97. Which I have looked in google means the family of protocol is
> not supported. Please tell me if it is possible to send the UDP
> packets from the kernel space using interface rteth0 and socket or
> not. Can u guide me how I can solve the error -97. Thanks in
> advance

Sorry, no, I never used RTnet interface in kernel-space. I seem to
recall not all functions may be called from all contexts (for
instance, calling socket may work from the init module, but not from
a real-time thread or vice versa), but apart from that, I have no
clue. The best answer at this point would be "use the source, Luke".

Regards.

-- 
					    Gilles.
https://click-hack.org

Re: [Xenomai] rtdm_socket() error -97 for sending UDP or RAW packets

[Umair Ali]

Hello Gilles,

Thanks for the reply.


** may work from the init module, but not from a real-time thread or vice versa I am calling rtdm_socket() in init module of the kernel app.

Can you tell me what kind of portocls are supported by rtdm_socket()


Thanks & Regards
Ali
-----Original Message-----
From: Gilles Chanteperdrix [mailto:gilles.chanteperdrix@xenomai.org]
Sent: April-29-16 11:06 PM
To: Umair Ali
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai] rtdm_socket() error -97 for sending UDP or RAW packets

On Fri, Apr 29, 2016 at 01:45:53PM +0000, Umair Ali wrote:
> Hello there,
> 
> I am working to make a module which will uses the Rtnet module to send 
> the UDP or RAW pakets. My aim is to use the interface 'rteth0' in 
> kernel space same like in userspace. Therefore I think I should create 
> the socket and then using the created socket link the interface rteth0 
> with it. But when I use the function 'rtdm_socket(PF_INET, 
> SOCK_RAW,0)' or 'rtdm_socket(PF_PACKET, SOCK_RAW,0)' or 
> 'rtdm_socket(PF_INET, SOCK_DGRAM,0)' or anything with available 
> options i.e also with sock_stream. I got the error -97. Which I have 
> looked in google means the family of protocol is not supported. Please 
> tell me if it is possible to send the UDP packets from the kernel 
> space using interface rteth0 and socket or not. Can u guide me how I 
> can solve the error -97. Thanks in advance

Sorry, no, I never used RTnet interface in kernel-space. I seem to recall not all functions may be called from all contexts (for instance, calling socket may work from the init module, but not from a real-time thread or vice versa), but apart from that, I have no clue. The best answer at this point would be "use the source, Luke".

Regards.

-- 
					    Gilles.
https://click-hack.org

Re: [Xenomai] rtdm_socket() error -97 for sending UDP or RAW packets

[Gilles Chanteperdrix]

On Mon, May 02, 2016 at 10:01:16AM +0000, Umair Ali wrote:
> 
> 
> Hello Gilles,
> 
> Thanks for the reply.
> 
> 
> ** may work from the init module, but not from a real-time thread or vice versa I am calling rtdm_socket() in init module of the kernel app.

Then maybe you should call it from a real-time thread.

> 
> Can you tell me what kind of portocls are supported by rtdm_socket()

This depends on the options you selected in RTnet configuration. If
you selected the protocol you want, but rtdm_socket fails in
kernel-space, again, looking at the sources will be your best help.

Regards.

-- 
					    Gilles.
https://click-hack.org

Re: [Xenomai] rtdm_socket() error -97 for sending UDP or RAW packets

[Umair Ali]

To be clear: From real time thread you mean the thread in userspace. And from the sources you mean the configuration options of the Rtnet when installing the Xenmai or do u mean that if the UDP module of the Rtnet is loaded or not. Please guide me.


Thanks
-----Original Message-----
From: Gilles Chanteperdrix [mailto:gilles.chanteperdrix@xenomai.org] 
Sent: May-02-16 1:06 PM
To: Umair Ali
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai] rtdm_socket() error -97 for sending UDP or RAW packets

On Mon, May 02, 2016 at 10:01:16AM +0000, Umair Ali wrote:
> 
> 
> Hello Gilles,
> 
> Thanks for the reply.
> 
> 
> ** may work from the init module, but not from a real-time thread or vice versa I am calling rtdm_socket() in init module of the kernel app.

Then maybe you should call it from a real-time thread.

> 
> Can you tell me what kind of portocls are supported by rtdm_socket()

This depends on the options you selected in RTnet configuration. If you selected the protocol you want, but rtdm_socket fails in kernel-space, again, looking at the sources will be your best help.

Regards.

-- 
					    Gilles.
https://click-hack.org