osmo-iuh.git branch sysmocom/ipa_nano3G updated. 575301ae326141af5745b60e286054448b6f1723

gitosis at osmocom.org gitosis at osmocom.org
Sun May 1 13:46:36 UTC 2016


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The branch, sysmocom/ipa_nano3G has been updated
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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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