openbsc.git branch master updated. 0.15.0-538-g5085e0b

gitosis at gitosis at
Fri Nov 18 19:04:53 UTC 2016

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commit 5085e0bf4c9674fb26754fd16b8e0c58113e1638
Author: Holger Hans Peter Freyther <holger at>
Date:   Tue Jul 12 17:53:26 2016 +0200

    ussd: Add band-aid for interrogationSS
    This is a speculative change for interrogateSS and by not answering
    the request the radio connection would remain open long.
    The SS/USSD code is from a time where none of knew much about GSM. We
    do not support SS but should reject it. We have checked for an empty
    string in the text field to guess if it is a result/release to not send
    more information. The right way forward is to decode the ASN1 into the
    fields REQUEST/RESULT(last).
    Fix an issue and make the code worse. Assume ss_code > 0 to see if this
    is a interrogate invoke. The issue is that code 0 is a well defined
    value but unlikely to be used.
    MAP ASN1 definition:
    SS-Code ::= OCTET STRING (SIZE (1))
            -- This type is used to represent the code identifying a single
            -- supplementary service, a group of supplementary services, or
            -- all supplementary services. The services and abbreviations
            -- used are defined in TS 3GPP TS 22.004 [5]. The internal structure is
            -- defined as follows:
            -- bits 87654321: group (bits 8765), and specific service
            -- (bits 4321)
    allSS                   SS-Code ::= '00000000'B
    Change-Id: Ib0dc4485388f030eb172fe21f5327b7ab94751f5


Summary of changes:
 openbsc/include/openbsc/gsm_04_80.h |  4 ++--
 openbsc/src/libmsc/gsm_04_80.c      |  4 ++--
 openbsc/src/libmsc/ussd.c           | 24 ++++++++++++++++--------
 3 files changed, 20 insertions(+), 12 deletions(-)

The OpenBSC GSM Base Station Controller (+MSC/HLR/SGSN)

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