[atlas] No address in the results when ping or traceroute fail?

Hi Stephane,

On 2013/07/21 21:34 , Stephane Bortzmeyer wrote:
> When a ping or traceroute emasurement fails, we do not know the IP
> address of the probe (empty "from" and no "src_addr"), which is
> annoying when you want to analyze the possible causes of the failure:
>
>   
The most likely cause for this is that the probe has no IPv6 default
router.

The from field is filled with the address that is used to connect to the
controller. If a probe doesn't have IPv6 connectivity then that is
address is unknown.

The src_addr is not there because of the way the linux kernel works.
Most measurements use the bind system call to find out which
local address will be used for outgoing packets. But if there is not
route to the destination then bind will fail.

Probes also report their network configuration but at the moment that is
done in a format that is not easy to parse. The next firmware should fix
that. Then we can see how to make that information available.

Philip