[riot-devel] Network Stack Question

Haoyang Yu haoyang.yu at rutgers.edu
Sat Oct 24 21:17:16 CEST 2015


Thanks for your answer!

I think I can send data between with each other, but I am puzzled by the realization, 

where can I find the txtsnd source codes?
Does packet txtsnd sent is through RF based on GNRC protocol, not the serial right? 

Thanks,
Haoyang


> On Oct 23, 2015, at 15:34, Martine Lenders <authmillenon at gmail.com> wrote:
> 
> Hi Haoyang,
> 
> 
> 2015-10-23 20:08 GMT+02:00 Haoyang Yu <haoyang.yu at rutgers.edu <mailto:haoyang.yu at rutgers.edu>>:
> txtsnd: I cannot set the interface, if I use tap0, which will echo: error: invalid interface given. 
> You need to use the interface on the node, not the TAP. The TAP is the endpoint on the host system for the "cable" you draw between host and native node. Use `ifconfig` to see what interface to use (as documented in the default example's README [1]).
> I found the tutorial that said using addr, but I do not have the addr command when I use the R21 board.
> Can you point us to this tutorial? The addr command was dropped for the last release. Everything can be done with `ifconfig` now (there is already an address configured though). 
> And what is the mean for interface for txtsnd to use, if I have /dev/tty.usbmodem* MCU device
> I don't know what you mean by that? If you mean it in the same way as you said you used `tap0` on the native node, see above, if you want to send actual packets over the serial line, have a look at SLIP [2] (or the gnrc_border_router example about how to use it).
>  
> [1] https://github.com/RIOT-OS/RIOT/tree/2015.09/examples/default#networking <https://github.com/RIOT-OS/RIOT/tree/2015.09/examples/default#networking>
> [2] http://doc.riot-os.org/group__net__gnrc__slip.html <http://doc.riot-os.org/group__net__gnrc__slip.html>_______________________________________________
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