Re: Xenomai3 network issues

On 20.05.26 01:26, Hannes Diethelm wrote:
> Hello
> 
> I don't know if I do something wrong or if there is a bug. However, I
> can not get any network connectivity from user space over rt_e1000e.
> 
> Config:
> Debian Trixie
> Xenomai3 master d4929cf
> linux-dovetail v6.12.y-cip-dovetail-rebase e2fc451
> 
> Setup:
> modprobe rt_e1000e

So, you also unbound the device from a e1000e that Linux likely
provides? Or unloaded that other driver?

> modprobe rt_loopback
> with/without modprobe rtpacket
> modprobe rtudp
> modprobe rtipv4
> rtifconfig rtlo up 127.0.0.1
> rtifconfig rteth0 up 192.168.122.45
> 

I suppose you also ran ARP (rtroute solicit) for the targets you want to
reach, right?

> I don't need the full RTnet stack, I only need a point to point UDP
> connection. This
> is why I manually load the kernel modules and set up the interface.
> rtnet start
> blocks while trying to reach a TDMA slave but my device doesn't has this
> functionality.
> 
> rtping to any network address works fine, but looking at the rtping
> code, an ioctl is
> used, so the data is sent and received in kernel space.
> 
> I had an issue with my code, so I tried the demo:
> 
> Without module rtpacket:
> ./demo/posix/cobalt/eth_p_all
> There are no packages from the real time driver only from the other
> network cards
> 
> ./demo/posix/cobalt/eth_p_all rteth0
> cannot get interface index: No such device
> 
> With module rtpacket:
> ./demo/posix/cobalt/eth_p_all
> socket cannot be created: Invalid argument
> 
> ./demo/posix/cobalt/eth_p_all rteth0
> socket cannot be created: Invalid argument

Cannot confirm that second experiment yet. Did you compile with
CONFIG_XENO_DRIVERS_NET_ETH_P_ALL?

> 
> rtifconfig
> rteth0    Medium: Ethernet  Hardware address: 52:54:00:5A:79:C5
>           IP address: 192.168.122.45  Broadcast address: 192.168.122.255
>           UP BROADCAST RUNNING  MTU: 1500
> 
> rtlo      Medium: Local Loopback
>           IP address: 127.0.0.1
>           UP LOOPBACK RUNNING  MTU: 1500
> 
> Regards
> Hannes

Jan

-- 
Siemens AG, Foundational Technologies
Linux Expert Center