Re: [riot-devel] Raw communication between native nodes

[Alexander Aring]

Hi,

On 06/22/2016 09:19 PM, Alexander Aring wrote:
> 
> Hi,
> 
> On 06/22/2016 05:28 PM, Jose Alamos wrote:
>> Hi,
>>
>> I was wondering if there's a way to send raw data between nodes running on
>> native. I need to send OpenThread packets between nodes (through a radio
>> abstraction), and I'm having problems with TAP interface since they only
>> process ethernet frames.
>>
>> I tried to hack a little bit (put these OT packets in ethernet frames) but
>> is not working well. Basically, I need to emulate a radio device.
>>
>> Is there an easy way to achieve this?
>>
> 
> some of you maybe knowing that I am working on a RIOT native 802154raw
> transceiver driver which works with AF_PACKET RAW linux-wpan interfaces.
> 
> At the end it should work like the following:
> 
> First I need to describe a special virtual 802.15.4 driver, it's named
> fakelb (maybe such idea can also be implemented in RIOT).
> 
> It works similar like the hwsim80211 driver in linux (but less
> functionality, I also was thinking to make a better implementation of
> fakelb and name it hwsim802154).
> 
> With such driver you can create "virtual phy's" in Linux.
> 
> E.g. 2 phy's,
> 
> 
>   6LoWPAN/etc   6LoWPAN/etc
>| |
>   wpan node interface  wpan node interface
>| |
>mac802154 mac802154
>| |
>wpan-phy0 <--L1(memcpy)--> wpan-phy1
> 
> Descrption:
>   - mac820154: Our 802154 SoftMAC stack
>   - 6LoWPAN/etc: upper layer IPv6, foo stack
>   - wpan node interface: a wpan node interface which does filtering
> 
> Now with a 802154raw native RIOT driver the following would be possible:
> 
> 
>RIOT native (Userspace)
>  AF_PACKET RAW
>|6LoWPAN/etc   6LoWPAN/etc
>|| |
>   wpan monitor interface  wpan node interface  wpan node interface
>|| |
>|mac802154 mac802154
>|| |
>wpan-phy2 <-L1(memcpy)-> wpan-phy0 <--L1(memcpy)--> wpan-phy1
> 

I implemented it [0]. You need 1-2 patches which currently pending on
linux-wpan mailinglist, but then it should be possible.

Next days I need to figure out how to send github pull requests again.

- Alex

[0] https://github.com/linux-wpan/RIOT/commits/802154_raw
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Re: [riot-devel] Raw communication between native nodes

[Alexander Aring]

Hi,

On 06/22/2016 05:28 PM, Jose Alamos wrote:
> Hi,
> 
> I was wondering if there's a way to send raw data between nodes running on
> native. I need to send OpenThread packets between nodes (through a radio
> abstraction), and I'm having problems with TAP interface since they only
> process ethernet frames.
> 
> I tried to hack a little bit (put these OT packets in ethernet frames) but
> is not working well. Basically, I need to emulate a radio device.
> 
> Is there an easy way to achieve this?
> 

some of you maybe knowing that I am working on a RIOT native 802154raw
transceiver driver which works with AF_PACKET RAW linux-wpan interfaces.

At the end it should work like the following:

First I need to describe a special virtual 802.15.4 driver, it's named
fakelb (maybe such idea can also be implemented in RIOT).

It works similar like the hwsim80211 driver in linux (but less
functionality, I also was thinking to make a better implementation of
fakelb and name it hwsim802154).

With such driver you can create "virtual phy's" in Linux.

E.g. 2 phy's,


  6LoWPAN/etc   6LoWPAN/etc
   | |
  wpan node interface  wpan node interface
   | |
   mac802154 mac802154
   | |
   wpan-phy0 <--L1(memcpy)--> wpan-phy1

Descrption:
  - mac820154: Our 802154 SoftMAC stack
  - 6LoWPAN/etc: upper layer IPv6, foo stack
  - wpan node interface: a wpan node interface which does filtering

Now with a 802154raw native RIOT driver the following would be possible:


   RIOT native (Userspace)
 AF_PACKET RAW
   |6LoWPAN/etc   6LoWPAN/etc
   || |
  wpan monitor interface  wpan node interface  wpan node interface
   || |
   |mac802154 mac802154
   || |
   wpan-phy2 <-L1(memcpy)-> wpan-phy0 <--L1(memcpy)--> wpan-phy1

In this setup you can ping from Linux IPv6 stack the RIOT Stack which
running in userspace.

I think your use case would be look like the following which is also
be possible:

   RIOT native (Userspace)   OpenThread native (Userspace)
 AF_PACKET RAW  AF_PACKET RAW
   | |
   | |
  wpan monitor interface wpan monitor interface
   | |
   | |
   | |
   wpan-phy0  wpan-phy1

Then you could connect RIOT native with openthread native over the
fakelb driver (maybe also add Linux nodes or more RIOT/OpenThread
nodes).

I know somebody is working for adding such virtual driver in OpenThread,
but I think they want to use real hardware for that (which I don't
recommend). This is just for stack testing, there exists unsolved issues
with ACK handling etc and you really don't want to bypass the great
Linux IPv6 Stack :-).

I cc the guy/girl which wants to add this stuff to OpenThread.

- Alex
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[riot-devel] Raw communication between native nodes

[Jose Alamos]

Hi,

I was wondering if there's a way to send raw data between nodes running on
native. I need to send OpenThread packets between nodes (through a radio
abstraction), and I'm having problems with TAP interface since they only
process ethernet frames.

I tried to hack a little bit (put these OT packets in ethernet frames) but
is not working well. Basically, I need to emulate a radio device.

Is there an easy way to achieve this?

Best regards.
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