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Hauke Petersen 729e4d1992 examples/gnrc_border_router: blacklisted boards 7 years ago
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Makefile examples/gnrc_border_router: blacklisted boards 7 years ago
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slip_params.h examples: provide example application for a 6LoWPAN border router 7 years ago

README.md

gnrc_networking_border_router example

Requirements

In order to setup a 6LoWPAN border router on RIOT, you need either a board that offers an IPv6 capable network interface (e.g. the encx24j600 Ethernet chip) or connect it over the serial interface to a Linux host and use the SLIP standard [1]. The example application in this folder assumes as a default to be run on an Atmel SAM R21 Xplained Pro evaluation board using an external UART adapter for the second serial interface. However, it is feasible to run the example on any RIOT supported platform that offers either more than one UART or be equipped with an IPv6 capable network device. In this case only the Makefile of this application has to be slightly modified, e.g. by replacing the line

USEMODULE += gnrc_slip

with something like

USEMODULE += encx24j600

and specify the target platform as BOARD = myplatform. In order to use the border router over SLIP, please check the periph_conf.h of the corresponding board and look out for the UART_NUMOF parameter. Its value has to be bigger than 1.

Configuration

In order to connect a RIOT 6LoWPAN border router over SLIP you run a small program called tunslip (imported from Contiki) [2] on the Linux host. The program can be found in the dist/tools/tunslip folder and has to be compiled before first use (simple calling make should be enough). Now, one can start the program by calling something like:

cd dist/tools/tunslip
make
sudo ./tunslip6 affe::1/64 -t tun0 -s /dev/ttyUSB0

Assuming that /dev/ttyUSB0 is the device descriptor for the (additional) UART interface of your RIOT board.

On the RIOT side you have to configure the SLIP interface by configuring a corresponding IPv6 address, e.g.

ifconfig 6 add affe::2

and adding the SLIP interface to the neighbor cache (because Linux won't respond to neighbor solicitations on an interface without a link-layer address) by calling

ncache add 6 affe::1

After this you're basically done and should be able to ping between the border router and the outside world (assuming that the Linux host is properly forwarding your traffic).

Additionally, you can configure IPv6 addresses on the 6LoWPAN interface for communication with other 6LoWPAN nodes. See also the gnrc_networking example for further help.

[1] https://tools.ietf.org/html/rfc1055

[2] https://github.com/contiki-os/contiki/blob/master/tools/tunslip.c