> 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
Hi all,
Just wanted to share an issue and a quick workaround I found for it in case
anyone else has the same problem. I believe a cmd2 update is causing
pySim-shell to fail. After installing it on a fresh install of Ubuntu
Server 20.04 and getting the following error when I run "python3
pySim-shell -p0":
>Using PC/SC reader interface
>Autodetected card type: sysmoUSIM-SJS1
>AIDs on card:
> USIM: a0000000871002ffffffff8907090000
>Traceback (most recent call last):
> File "pySim-shell.py", line 512, in <module>
> app = PysimApp(card, rs, opts.script)
> File "pySim-shell.py", line 59, in __init__
> super().__init__(persistent_history_file='~/.pysim_shell_history',
allow_cli_args=False, use_ipython=True, auto_load_commands=False,
command_sets=basic_commands, >startup_script=script)
>TypeError: __init__() got an unexpected keyword argument 'use_ipython'
If you run into this you can fix it by uninstalling cmd2 and reinstalling
cmd2 with "pip3 install cmd2==1.5".
Best,
Bryan
Hi,
I had a problem placing MO GSM calls from a Siemens S11E: The calls
were dropped immediately; Osmo-MSC reports "Cannot compose Channel
Type from bearer capabilities"
After investigating the SETUP request from the S11E, the phone does
not use octet 3a (no extension bit set in IE 3). Wireshark decodes the
radio channel requirement as "Full rate support only MS/fullrate
speech version 1 supported", so I added a condition to the gsm48_ie.c
function of libosmocore to include at least GSM FR in the list of
available speech_ver in case octet 3 has no extension.
Attached to this message are the Abis-IP PCAP traces of MO calls, and
the patch for gsm48_ie.c.
Regards,
Lennart
Hi,
My name is Brackley Cassinga Form DRC, we run a community network called
pamoja net where we offer gsm services using osmocom open source software
and OC Base station.
Recently I have tried to install another base station as the same installed
but I could not find any resource guiding through all the steps to take to
run NIB on a base station.
I'm currently running Ubuntu and I will appreciate if you could guide me on
the installation of BSC,hlr,MSC , in order to run a basic gsm network.
Thank you. Regards
--
*Ir Brackley heshima Casinga **Pacifique*
*CEO and Founder of kwanzatechnologie*
KwanzaTechnologies ,GlobalElectronics
+243977265291 | +243977265291 | Pcassinga(a)gmail.com/
brackley(a)ensemblepourladifference.org
www.kwantechnologies.jimdosite.com <http://www.kwantechnologies.com/> |
Skype: Brackley cassinga <https://webapp.wisestamp.com/#>
Av Semliki N 43
Hi all,
I was thinking about how to deal with the so called "evil twins" in the
distributed hlr, and also how to have a subscriber-create-on-demand
situation at the same time as a having an mslookup client.
The problem being that if we have mslookup client + fallback to
create-on-demand if no HLR responds for an IMSI, we will eventually
create a duplicate because the HLR that owns the IMSI is not contactable
at the time of an IMSI ATTACH attempt.
Anyway, just in terms of investigating the situation on my HLRs, I added
features [1] - so far, an ability to do a gsup.hlr lookup and not exit
on the first age:0 - so that I can see all HLRs that respond as having
the imsi in local HLR, and also to ask via mDNS for HLRs that have an
IMSI, but only if it's active on that HLR, that is, it has nam_cs/nam_ps
So this is really asking about what people feel about expanding the
D-GSM features in osmo-hlr, as I think it may be the case that
rhizomatica/TIC are the only people that use it?
[1] https://gitlab.tic-ac.org/rhizomatica/osmo-hlr
Hi, is it possible to use soapyMultiSdr for osmo-trx? I have a hackrf one, which isn't full duplex, so my idea is to use the hackrf for tx, and something else for Rx. With soapymultisdr it is possible to use multiple devices as a single soapysdr device.
Dear Harald,
Sorry to spam the openbsc list with this, but if you (or someone) can
confirm if the Sgsn-emu part of Osmo-GGSN utilizing the kernel GTP
module or not, that would be lovely.
FYI, I was not able to pass more than 280Mbit and the sgsn-emu process
was maxing out a single core. Based on this I suspect that it does not
use the kernel GTP module. I have seen some commits that indicates
preparation work for this feature, but it is unclear at least to me,
if this was finished or not. In the Osmo-GGSN.cfg example config I can
see the config option for kernel GTP, but not in the sgsn-emu.cfg
example.
Regards,
Csaba
Hi Pau and Harald,
> So sgsnemu is passing use_kernel=false, which makes the lib skip gtp-kernel functions
That is nice, I can play with that part quite nicely and take a look
how the GGSN handles the switch between kernel and non-kernel GTP.
Thanks for that!
@Harald:
In gtpnl.h there is
int gtp_dev_create()
and
int gtp_dev_create_sgsn()
So it seems there is a different dev create for the SGSN mode. And in
the later one the role is set to "GTP_ROLE_SGSN"
int gtp_dev_create(int dest_ns, const char *gtp_ifname, int fd0, int fd1)
{
return _gtp_dev_create(dest_ns, gtp_ifname, fd0, fd1, GTP_ROLE_GGSN);
}
EXPORT_SYMBOL(gtp_dev_create);
int gtp_dev_create_sgsn(int dest_ns, const char *gtp_ifname, int fd0, int fd1)
{
return _gtp_dev_create(dest_ns, gtp_ifname, fd0, fd1, GTP_ROLE_SGSN);
}
EXPORT_SYMBOL(gtp_dev_create_sgsn);
I just need to find the relevant part is sgsn-emu to see where these
parts are invoked so I can make the modifications.
Regards,
Csaba
<openbsc-request(a)lists.osmocom.org> ezt írta (időpont: 2022. dec. 24.,
Szo, 13:00):
>
> Send OpenBSC mailing list submissions to
> openbsc(a)lists.osmocom.org
>
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> than "Re: Contents of OpenBSC digest..."
>
> Today's Topics:
>
> 1. Re: SGSNemu performance (Pau Espin Pedrol)
> 2. Re: SGSNemu performance (Harald Welte)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 23 Dec 2022 18:38:55 +0100
> From: Pau Espin Pedrol <pespin(a)sysmocom.de>
> Subject: Re: SGSNemu performance
> To: Sipos Csaba <dchardware(a)gmail.com>,
> "openbsc-request(a)lists.osmocom.org" <openbsc(a)lists.osmocom.org>,
> laforge(a)osmocom.org
> Message-ID: <782d5c68-0393-e63a-ddbd-a78ca04256e0(a)sysmocom.de>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> Hi Csaba,
>
>
>
> On 12/22/22 15:00, Sipos Csaba wrote:
> > Dear Harald,
> >
> > Sorry to spam the openbsc list with this, but if you (or someone) can
> > confirm if the Sgsn-emu part of Osmo-GGSN utilizing the kernel GTP
> > module or not, that would be lovely.
>
> sgsnemu is not using the kernel module, only osmo-ggsn has support for
> it so far.
>
> See osmo-ggsn.git/./sgsnemu/sgsnemu.c line 1905 calling:
> """
> if (tun_new((struct tun_t **)&tun, options.tun_dev_name, false, -1, -1))
> """
>
> See tun_new() function used by both osmo-ggsn and sgsnemu:
> """
> int tun_new(struct tun_t **tun, const char *dev_name, bool use_kernel,
> int fd0, int fd1u) {
> """
>
> So sgsnemu is passing use_kernel=false, which makes the lib skip
> gtp-kernel functions like gtp_kernel_create().
>
> >
> > FYI, I was not able to pass more than 280Mbit and the sgsn-emu process
> > was maxing out a single core. Based on this I suspect that it does not
> > use the kernel GTP module. I have seen some commits that indicates
> > preparation work for this feature, but it is unclear at least to me,
> > if this was finished or not. In the Osmo-GGSN.cfg example config I can
> > see the config option for kernel GTP, but not in the sgsn-emu.cfg
> > example.
> >
>
> You could try passing use_kernel=true to tun_new(), and see how far you
> can get. Patches welcome.
>
> Regards,
> Pau
>
>
> --
> - Pau Espin Pedrol <pespin(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
>
> ------------------------------
>
> Message: 2
> Date: Fri, 23 Dec 2022 18:47:57 +0100
> From: Harald Welte <laforge(a)gnumonks.org>
> Subject: Re: SGSNemu performance
> To: Pau Espin Pedrol <pespin(a)sysmocom.de>
> Cc: Sipos Csaba <dchardware(a)gmail.com>,
> "openbsc-request(a)lists.osmocom.org" <openbsc(a)lists.osmocom.org>
> Message-ID: <Y6XpzZoYYdVxYKdb@nataraja>
> Content-Type: text/plain; charset=us-ascii
>
> Hi Csaba and Pau,
>
> On Fri, Dec 23, 2022 at 06:38:55PM +0100, Pau Espin Pedrol wrote:
> > You could try passing use_kernel=true to tun_new(), and see how far you can
> > get. Patches welcome.
>
> The GTP kernel module needs to be told if it operates in SGSN or GGSN mode.
>
> grep for GTP_ROLE_SGSN in libgtpnl. I don't know all of the related functions
> off my head, but on the SGSN side you need to make sure to initialize the kernel
> GTP with GTP_ROLE_SGSN instead of GTP_ROLE_GGSN.
>
> --
> - Harald Welte <laforge(a)gnumonks.org> https://laforge.gnumonks.org/
> ============================================================================
> "Privacy in residential applications is a desirable marketing option."
> (ETSI EN 300 175-7 Ch. A6)
>
> ------------------------------
>
> Subject: Digest Footer
>
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> ------------------------------
>
> End of OpenBSC Digest, Vol 98, Issue 9
> **************************************
Hi all!
Recently in the IRC I brought up a topic of testing voice calls in
OsmoCNI, which then turned into a discussion. The problem is I wanted
to highlight is that there is currently no *easy* way to test voice
calls, especially when running a virtual OsmoRAN setup (fake_trx.py +
trxcon or virtphy).
== A bit of history ==
Back in the openbsc/osmo-nitb days I used to run jolly's LCR (Linux Call
Router) [1], which was configured to play some hold melody when calling
995, and echo voice frames back when calling 999.
Nowadays openbsc/osmo-nitb is obsolete and completely suppressed by the
new and shiny OsmoRAN/OsmoCNI stack. The LCR is not actively maintained
anymore and does not support the MNCCv8, so it cannot talk to osmo-msc.
BTW, I forked it, fixed some compilation errors, created a package, and
tried to implement MNCCv8 support (no luck, calls still don't work):
https://gitea.osmocom.org/vyanitskiy/lcr/commits/branch/fixeria/fixeshttps://gitea.osmocom.org/vyanitskiy/lcr/commits/branch/fixeria/mncchttps://aur.archlinux.org/packages/lcr-git
Looks like it does not support late TCH assignment?
[1] http://www.linux-call-router.de/
== Current situation ==
Currently with the new post-NITB stack I see the following options:
a) run a virtual BTS, attach two mobiles, and setup a call between them;
b) run a real BTS, attach two phones, and setup a call between them;
c) run some PBX, talking to osmo-msc via osmo-sip-connector.
Personally I find neither of these options convenient because:
a) requires running two instances of the mobile app (from
osmocom-bb.git). I know one can run two and even more MS instances in
one mobile process, but this is still not handy.
b) requires running a real BTS and interacting with real phones. This
is what I usually do, but it takes more time than running everything
virtually.
c) requires setting up a PBX (e.g. Freeswitch, Asterisk), which in its
turn requires digging into the new world of configuration files. I do
have a repository with a know-to-work Freeswitch configuration [2], but
installing it (even from packages) is not trivial.
[2] https://people.osmocom.org/fixeria/freeswitch.cfg.zip
== What do I want ==
It would be great to have an easy-to-use echo service, be it attached to
osmo-msc via the MNCC socket, or be it built-in part of osmo-msc itself.
This would be usable for both real and virtual setups.
== Conclusion ==
I would like to know how do you guys test voice, and what do/would you
consider an easy approach. I actually found out that it's possible to
use osmo-msc's silent-call feature and play the Uplink RTP stream with
osmo-gapk. I'll share more details in a follow up mail.
In the IRC @whytek proposed to use sipp [3] and later came up with a
wiki page [4] describing how to achieve this with SEMS (SIP Express
Media Server). This is definitely easier than setting up Freeswitch or
Asterisk, but still feels like an overkill (sorry).
[3] https://sipp.sourceforge.net/doc/reference.html#RTP+echo
[4]
https://osmocom.org/projects/cellular-infrastructure/wiki/Simple_Echo_Server
Best regards,
Vadim.
--
- Vadim Yanitskiy <vyanitskiy at 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
