[riot-devel] Connecting RasPi with RIOT node via 6lowpan using ULAs

Sebastian Meiling meiling.sebastian at gmail.com
Wed Feb 10 21:53:01 CET 2016


Hi again,
Hi Kaspar,

tried EUI-64 approach, didn't help, here some RIOT debugging output,

---snip---
 ipv6: GNRC_NETAPI_MSG_TYPE_RCV received
 ipv6: Received (src = fd59:7f5:2065:7622:27cf:f952:ab74:5912, dst = ff02::1:ffbb:e29e, next header = 58, length = 40)
 ipv6: handle ICMPv6 packet (nh = 58)
 icmpv6: neighbor solicitation received
 ndp: received neighbor solicitation (src: fd59:7f5:2065:7622:27cf:f952:ab74:5912, dst: ff02::1:ffbb:e29e, tgt: fd59:7f5:2065:7622:5855:4245:c8bb:e29e)
 ndp: received SL2A (link-layer address: 25:cf:f9:52:ab:74:59:12)
 ipv6_nc: Found entry for fd59:7f5:2065:7622:27cf:f952:ab74:5912 on interface 7 (0 = all interfaces) [0x20001428]
 ndp internal: send neighbor advertisement (iface: 7, tgt: fd59:7f5:2065:7622:5855:4245:c8bb:e29e, dst: fd59:7f5:2065:7622:27cf:f952:ab74:5912, supply_tl2a: 1)
 ndp: building target link-layer address option (l2addr: 5a:55:42:45:c8:bb:e2:9e)
 ndp: building neighbor advertisement message
 icmpv6: Building ICMPv6 message with type=136, code=0
 ipv6: GNRC_NETAPI_MSG_TYPE_SND received
 ipv6_nc: Found entry for fd59:7f5:2065:7622:27cf:f952:ab74:5912 on interface 7 (0 = all interfaces) [0x20001428]
 6low: KERNEL_PID_UNDEF
 ipv6: error determining next hop's link layer address
---snap---

I'm not quite fit with internals of gnrc ipv6|6low|ndp but somehow the stack cannot find a suitable router/interface to forward/send the message and gets this 'KERNEL_PID_UNDEF' out of the loop - which finally drops the packages and nothing is send. However as you can see above the NS from the RasPi is received, all IPs are correct and correspond with my setup (no byte flips or anything here). A response NA is build and put on the stack for sending, which fails.

Sebastian

> Am 10.02.2016 um 21:13 schrieb Kaspar Schleiser <kaspar at schleiser.de>:
> 
> Hey,
> 
> On 02/10/2016 09:04 PM, Sebastian Meiling wrote:
>> - RasPi 	`sudo ip addr add fd59:7f5:2065:7622::2/64 dev lowpan0`
> Try setting an address based on the interface's EUI-64.
> 
> Kaspar
> _______________________________________________
> devel mailing list
> devel at riot-os.org
> https://lists.riot-os.org/mailman/listinfo/devel

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