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http://cgit.osmocom.org/osmo-iuh/commit/?id=575301ae326141af5745b60e286054448b6f1723
commit 575301ae326141af5745b60e286054448b6f1723
Author: Harald Welte <laforge at gnumonks.org>
Date: Sat Apr 30 23:52:02 2016 +0200
hack: Accept also UE_Identity_PR_pTMSIRAI in HNBAP from nano3G
I have the feeling that the nano3G simply forwards whatever identity it
receives from the MS in RRC via HNBAP, without sending any IDENTITY
REQUESTS by itself. That seems like a violation of the RANAP
specification, but well.
As opposed to Neels' earlier commit, the phone I was testing with
(GT-I9100) is using the UE_Identity_PR_pTMSIRAI (PS identity) instead of
UE_Identity_PR_tMSILAI (CS identity) when trying its first attempt to
register to the network, so let's support that equally.
http://cgit.osmocom.org/osmo-iuh/commit/?id=ce605fab0a1d3b6eeb417bf31ceeed03dfe724c1
commit ce605fab0a1d3b6eeb417bf31ceeed03dfe724c1
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date: Mon Apr 25 15:05:32 2016 +0200
hack: simply accept UE Register Requests with TMSI
HNBGW would usually keep track of UEs that have registered, with their
IMSI. When a UE registers with only a TMSI, we obviously can't store an
IMSI. However, since we're so far never *using* the list of UEs in
osmo-hnbgw, we might as well just accept the TMSI registration and carry
on as usual.
This is particularly helpful with an ip.access nano3G femto cell, as it
tends to send UE registrations with a TMSI+LAI identification instead of
an IMSI when the subscriber is known. This causes timeouts of several
minutes until a UE registration switches back to IMSI. When simply
accepting the TMSI in osmo-hngw, no problems are apparent in our current
code state.
We could use the subscriber list during paging, but on the other hand,
it doesn't hurt to anyway always page to all HNBs connected to osmo-hnbgw.
The paging procedure does include a page-to-all-HNBs in case the first
HNB paging fails. However, since we're now failing to record UEs that
register by TMSI, we must be aware that trying to page such UE on only
its last seen HNB will fail; it is plainly missing in the list.
http://cgit.osmocom.org/osmo-iuh/commit/?id=544b76d6e2db765c57e35af0aa99f162a28685fe
commit 544b76d6e2db765c57e35af0aa99f162a28685fe
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date: Mon Apr 25 14:55:35 2016 +0200
UE Register with TMSI: reply with a Register Reject
When receiving a UE Register Request with TMSI and no IMSI, compose a
Register Reject with the same UE Identity and send.
The accepting function expects a ue_context argument and composes the
message from the IMSI found there. This new rejection message cannot rely
on a ue_context struct and hence uses the asn1 uE_Identity directly.
-----------------------------------------------------------------------
Summary of changes:
src/ranap_msg_factory.c | 6 +-----
src/tests/test-ranap.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++
src/tests/test-ranap.ok | 23 +++++++++++++++-----
3 files changed, 76 insertions(+), 10 deletions(-)
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Osmocom code for Iuh interface