> I don't understand. This callback will be called with data you need to
write
> to the network. In case of MTP Level3 you will need to wrap that around
the
> msgb you got.
I means: is the interaction with mtp3 layer implemented (is sending sccp
data by mtp3 implemented by the library?)?
Also, what about the reception of data from mtp3 layer. is that implemented
in the sccp lib.
I am asking these questions because I see the code of mtp3 in the lib but no
significant call is present in the sccp part of the lib.
Thank you for your help.
On Tue, Jun 28, 2016 at 10:05:28AM +0200, Harald Welte wrote:
> [translated from german]
> is it certain that we switch a channel to PDCH only when
> gprs mode != none?
A TS can be GSM_PCHAN_TCH_F_PDCH; those are the only ones for which we
send a PDCH ACT message.
We send a PDCH ACT message
- during init (CHANNEL OML's state changed to enabled -> send PDCH ACT),
- and upon channel release ack when pchan == GSM_PCHAN_TCH_F_PDCH.
So the question is, when we receive a channel release ack, could that be
the PDCH release and we switch PDCH right back on by accident? No, because
we only receive a chan rel ack when the *TCH/F* is being released.
That is because the PDCH release is initiated "internally" from the PDCH
DEACT, and thus this condition in common/rsl.c rsl_tx_rf_rel_ack() catches
on, which existed before dyn PDCH:
if (lchan->rel_act_kind != LCHAN_REL_ACT_RSL) {
LOGP(DRSL, LOGL_NOTICE, "%s not sending REL ACK\n",
gsm_lchan_name(lchan));
return 0;
}
In rsl_rx_rf_chan_rel() the rel_act_kind is set to LCHAN_REL_ACT_RSL, but
not in the rsl_rx_dyn_pdch().
This is analogous to the ip.access way -- the ip.access nanobts replies to
a PDCH DEACT with a PDCH DEACT ACK and doesn't send a separate channel
release ack.
Maybe we could set rel_act_kind to some new LCHAN_REL_ACT_IPAC_DYN_PDCH
for clarity? (But we shouldn't actually send a release ack, to stay
compatible.)
Even though it works as-is, we should indeed add another flag check:
- We do check the flags that no ACT/DEACT is already pending;
- And we do send a PDCH DEACT only if ts->flags & TS_F_PDCH_ACTIVE;
- But we would send a PDCH ACT despite ts->flags & TS_F_PDCH_ACTIVE.
This should never happen, but it would make sense to ensure that.
~Neels
We're still having massive stability problems with osmo-bts-trx on the osmo-gsm-tester.
I have run a tcpdump on the ntp port for the past days, and nothing is doing
ntp besides the actual ntp service.
Today I started ntp while an osmo-bts-trx run was active and what do you know,
the osmo-bts-trx process exits immediately. I think this is bad, osmo-bts-trx
shouldn't use wall clock time for precise timing needs.
Besides that, I have no idea what could cause the clock skews, except maybe
that the CPU or the USB are not fast enough?? I'm wondering, is there still
such a thing as a separate linux realtime kernel?
We will soon take to productive use another main unit which will be a cleanly
installed OS. If we see the same problems on that system and can't find a
software fix, we may need to reconsider the tester for osmo-bts-trx...
~N
Hi,
I’ve been looking into getting ussd working with an external application. I
found a branch from last year (fairwaves/sup-ussd) that looks like it has
implemented most of ussd sessions and possibly communicates with an
external application. Does anyone know if it was finished or what still
needs to be done?
I also found a python script called ussd_example.py which looks like it is
supposed to act as a gateway and receive used connections from openbsc. Is
this correct and did it work or am I misunderstanding its purpose?
Thanks!
- Rowan Phipps
I'd like to share a VTY config error analysis that has a tricky solution:
I started osmo-bsc -c osmo-bsc.cfg with, according to
openbsc/doc/examples/osmo-bsc:
net
[...]
bts 0
[...]
periodic location update 30
trx 0
[...]
and get this error:
There is no such command.
Error occurred during reading below line:
trx 0
what? 'net / bts / trx' is no command??
Solution: I'm on the vlr_3G branch (incorporating 2G via A-interface) and on
this branch, I've actually moved the 'periodic location update N' command a
level up, from net / bts / periodic to net / periodic (background: assuming
that OsmoMSC does not have individual BTS info, we moved some settings up to
network level; whether this makes sense for osmo-bsc is a different question,
it's just what happens to be on the vlr_3G branch now).
So there is no net / bts / periodic command.
Why do I get an error for net / bts / trx instead?
two reasons:
1. 'trx 0' was the line following the 'periodic' command,
2. since 'periodic' exists one level above, the vty code goes to the parent
node automatically.
About 2: we tend to indent our VTY config files, but in fact the indentation
has no effect whatsoever, it is just eye candy (very useful eye candy).
The code in question: If a command does not exist, try 'vty_go_parent()' and
see if the command exists there. That's what allows us to omit 'exit' in our
config files to go to the parent node explicitly:
libosmocore/src/vty/command.c:
int config_from_file(struct vty *vty, FILE * fp)
{
int ret;
vector vline;
while (fgets(vty->buf, VTY_BUFSIZ, fp)) {
vline = cmd_make_strvec(vty->buf);
/* In case of comment line */
if (vline == NULL)
continue;
/* Execute configuration command : this is strict match */
ret = cmd_execute_command_strict(vline, vty, NULL);
/* Try again with setting node to CONFIG_NODE */
while (ret != CMD_SUCCESS && ret != CMD_WARNING
&& ret != CMD_ERR_NOTHING_TODO
&& is_config_child(vty)) {
HERE -----> vty_go_parent(vty);
ret = cmd_execute_command_strict(vline, vty, NULL);
}
cmd_free_strvec(vline);
if (ret != CMD_SUCCESS && ret != CMD_WARNING
&& ret != CMD_ERR_NOTHING_TODO)
return ret;
}
return CMD_SUCCESS;
}
In this case the 'periodic...' command does in fact now exist one level above,
so the vty_go_parent() is successful and running that command works. But, the
vty config parsing then sits above on the 'network' level, is no longer in 'bts
0' and hence refuses to accept the following bts-level command, in this case
'trx 0'. Confusing!
So it's not a bug, it's a feature. But it's a feature we might see quite often
if we move the 'periodic' command up to network level and users attempt to use
their old config files.
Same goes for the 'timezone' command, BTW, so we might want to rename commands,
or re-consider moving commands one level up in the first place. Maybe we should
leave backward compat catchers in place that print a warning.
~N
--
- Neels Hofmeyr <nhofmeyr(a)sysmocom.de> http://www.sysmocom.de/
=======================================================================
* sysmocom - systems for mobile communications GmbH
* Alt-Moabit 93
* 10559 Berlin, Germany
* Sitz / Registered office: Berlin, HRB 134158 B
* Geschäftsführer / Managing Directors: Harald Welte
Hi!
We have some builds that happen inside a docker, and some that happen natively
on the (Debian 8) build slave. Can somebody involved with this illustrate
why that is the case, and what's the rationale here?
Just looking at the setup, I'm unable to figure out whether there's any
particular reason for this, or whether it's simply "we started without and
then did some builds in docker but nobody migrated the other builds over"
>From my point of view, I would have assumed that building in different containers
would make sense to e.g. build on different distributions / versions, or
building against older libosmo* vs. building against libosmo* from nightly
package feeds vs. re-building all dependencies from master.
But it appears that only a single container is built, and that container is
used for some jobs (like osmo-msc-gerrit) but not for other jobs.
If I missed some wiki page or mailing list posts with related information,
a pointer would be helpful. Thanks in advance.
Regards,
Harald
--
- Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
I would have welcomed more patience in merging https://gerrit.osmocom.org/3685,
"Use value string check from osmo-ci" in libosmocore.
(the commit log of which fails to indicate removal of the script, btw)
Moving to the new repositories, I have enough loose ends flapping in the wind,
and dropping the script from libosmocore has added yet another distraction,
while not being necessary to start using the one from osmo-ci.
Max clearly posted "N. B: this should be merged last, after all the repos
converted to check script from osmo-ci." -- which is not the case for the new
repositores split from openbsc.git.
In osmo-msc I have >50 patches waiting to be merged. The timing could hardly
have been worse, luckily only a few gerrit builds are affected. Will try to
sort out merging of the patches without needing a rebase and >50 rebuilds.
Thanks for you attention :)
~N
Hi.
I'd like to propose to switch from local (unmaintained?) copy of git-version-gen
script and use it directly from upstream gnulib package. It's available pretty-much
everywhere (including ancient Debian which we support for nightly). It's also
available in meta-oe: https://layers.openembedded.org/layerindex/recipe/47365/
It doesn't feel right to use copy-pasted code when we could offload the maintenance
work to packaging/dependency tools.
What do you think? Please contribute to https://osmocom.org/issues/2467 which I've
created to track this RFC.
--
Max Suraev <msuraev(a)sysmocom.de> http://www.sysmocom.de/
=======================================================================
* sysmocom - systems for mobile communications GmbH
* Alt-Moabit 93
* 10559 Berlin, Germany
* Sitz / Registered office: Berlin, HRB 134158 B
* Geschaeftsfuehrer / Managing Director: Harald Welte
Dear Osmocom community,
from August 26th 06:54 UTC through August 31st 06:22 UTC our Osmocom.org
redmine could not send any e-mails. This was due to a configuration
file syntax error introduced by me, my apologies.
If you rely on redmine e-mail notifications to the issues you have
subscribed to, please double-check as related notifications during that
interval were unfortunately lost.
Best regards,
Harald
p.s.: The reason for the config change was to enable e-mail
notifications from jenkins.osmocom.org (which it now has, if you want to
configure e.g. post-build notification actions).
--
- Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
