I have been looking into the example data provided by Osmocom as shown in
the link below.
I could reproduce the first pcap output (up to the Ciphering Mode Command)
for the Voice call using the gmr1_rx_live from the live branch.
With the provided Kc, I thought I would be able to reproduce the second
pcap (including the call setup). I have modified the sa_tch3.c to include
the Kc code. However, I am not able to get the results as shown in the
second pcap file. I noticed that in the sa_tch3.c code, there is a
ciphering part (marked by "Retry with ciphering") which was disabled. This
part of code didn't compile as some variables were not defined.
Probably my approach was not right. Any pointer here? Which code is needed
to produce the second pcap (deciphered) file given the Kc is known?
Many thanks in advance.
Dear fellow Osmocom developers,
as you all know, we've sadly had to postpone OsmoDevCon 2020 back in
April this year. At the time, we discussed to re-visit the situation
in October 2020.
While legally it is no problem at all to host an event with ~ 20
participants in Berlin/Germany (specific regulations really only start
from 50+ participants) - I'm not entirely convinced it would be the
Legality and public health regulations are only one part of the equation
- common sense and profound care for the key members of our community
for sure are more relevant considerations to me.
I'm not 100% in favour and not 100% against. Hence, I would like to get
your input. Should we
a) try to get an event organized on-site in Berlin? We'd have to move
to a larger venue than IN-Berlin with proper ventilation and sufficient
space so we can keep physical distance, but I think that's
manageable for sysmocom as organizer.
b) simply postpone to 2021? I'm convinced the situation will not change
significantly (in a positive way) until late April 2021, so it's not
really a "solution" as it will likely mean we have to think of late
2021 or 2022.
c) plan some kind of online conference? To be honest, I think this
model works fine for events where a single speaker wants to give
lectures to hundreds or thousands of participants. But OsmoDevCon
is much more interactive. We could record or live-stream some talks
or screencasts from home, sure. But that only captures one part of
the event. We could also try to set a date for a collaborative
mumble, or the like - for the "hallway track".
What are your thoughts? Let's avoid cross-posting the discussion to all
of the mailing lists and simply have it on openbsc(a)lists.osmocom.org.
- Harald Welte <laforge(a)osmocom.org> http://laforge.gnumonks.org/
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)