29 Jan
2013
29 Jan
'13
1:37 p.m.
On Tue, Jan 29, 2013 at 4:33 PM, Harald Welte <laforge(a)gnumonks.org> wrote:
Hi Alexander,
On Tue, Jan 29, 2013 at 04:11:26PM +0400, Alexander Chemeris wrote:
Just to clarify. Do you just want to transfer a normal log string as a
payload in a GSMTAP message, so that it'll be shown in Wireshark
"Info" column?
Yes, debugging PCU is PITA and we've been
discussing logging
improvements with Ivan for some time already. From our discussions it
seems that the biggest issue is to correlate log messages with the
actual user and/or session. How do you want to solve this issue with
the GSMTAP?
I would treat those two independent. The case for GSMTAP is simply to
have a synchronous / monotonic log (pcap in this case) that combines
both actual packets on Gb and Um, as well as the human-readable log
messages generated by the PCU code in between. As for the human-readable PCU log messages, I would
suggest something
like pre-fixing all of them with the TLLI in the beginning like
[1a2b3d4e] at the start of every line. I would guess that for most of
the log messages, the TLLI to which they relate should be known. The
same is not the case for other identifiers like the IMSI.
I'll let Ivan comment on that. My knowledge is somewhat lacking in this area.
--
Regards,
Alexander Chemeris.
CEO, Fairwaves LLC / ООО УмРадио
http://fairwaves.ru