openbsc.git branch jerlbeck/wip/gprs-patching updated. 0.13.0-762-gf610132

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http://cgit.osmocom.org/openbsc/commit/?id=f61013282c9aee2287bc901261c025f55cc34399

commit f61013282c9aee2287bc901261c025f55cc34399
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Tue Nov 11 14:01:48 2014 +0100

    sgsn: Add VTY commands to manage subscriber cache
    
    This adds the following commands to the ENABLE node:
      - show subscriber cache
      - update-subscriber imsi IMSI insert authorized (0|1)
      - update-subscriber imsi IMSI cancel
    
    These commands are mainly testing tools and maintenance helpers. The
    update commands work asynchronously and can be used to complete a
    pending update request or to terminate an existing connection.
    
    Note that the subscriber cache is not stored persistently and will
    always be empty after an SGSN restart.
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=d568ce8d2e751553edb2e39c101a813572720b5b

commit d568ce8d2e751553edb2e39c101a813572720b5b
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Tue Nov 11 14:47:38 2014 +0100

    sgsn: Add gsm0408_gprs_access_cancelled (TODO)
    
    This function is called to delete an established MM context
    without invoking a detach procedure that could disable the GPRS
    functionality of the MS until the next power cycle.
    
    It is called when a subscriber is cancelled.
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=90a1647f413b5113f9e3e0fd8dabf78a00e984c9

commit 90a1647f413b5113f9e3e0fd8dabf78a00e984c9
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Wed Nov 12 10:18:09 2014 +0100

    sgsn: Integrate subscriber handling into the SGSN (TODO)
    
    This commit adds a new authorization policy 'remote' and uses
    the subscriber cache for authorization when this policy is being used.
    
    Note that there is no remote backend implemented yet.
    
    TODO:
     - tests
    
    Ticket: OW#????
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=a14c0882329fbb1bf139bc5d9945758c3d06d575

commit a14c0882329fbb1bf139bc5d9945758c3d06d575
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Wed Nov 12 10:12:11 2014 +0100

    sgsn: Add gprs_subscriber.c (TODO)
    
    This adds GPRS specific functions for gsm_subscriber objects. The
    sgsn_update_subscriber_data callback is extended by a parameter that passes a reference to a gsm_subscriber.
    
    TODO:
     - tests
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=56f869d67f8ae3160a5821df28b688f8b16beace

commit 56f869d67f8ae3160a5821df28b688f8b16beace
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Wed Nov 12 09:53:45 2014 +0100

    sgsn: Extend gsm_subscriber and sgsn_mm_ctx by references
    
    This adds a field mm to struct gsm_subscriber that will be used by
    the SGSN to store a reference to the current MM context (or NULL if
    there is none). This also adds a field subscr to struct sgsn_mm_ctx
    that reversely points to a gsm_subscriber (or NULL if there is none).
    Either both fields are NULL or both fields are non-NULL. Note that
    subscr is being reference counted.
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=25a2b945cee417df29ce14d8b92744416db2611b

commit 25a2b945cee417df29ce14d8b92744416db2611b
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Fri Nov 7 14:17:44 2014 +0100

    sgsn: Refactor sgsn_auth to separate request and authorization (TODO)
    
    Currently the authorization is done in sgsn_auth_request for ACL
    based authorization. This doesn't match the way remote authorization
    would work, so that there is a second call to sgsn_auth_state already
    present in sgsn_auth_update.
    
    This patch removes the autorization check completely from
    sgsn_auth_request which in turn now calls sgsn_auth_update directly.
    
    TODO:
     - Use sgsn_instance instead of config as parameter
     - more commit message text
    
    Ticket: OW#????
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=b7def117ed68d8e99e1488bab2dbcb80ea60b2e6

commit b7def117ed68d8e99e1488bab2dbcb80ea60b2e6
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Thu Nov 6 15:43:10 2014 +0100

    sgsn: Don't assign a new P-TMSI if one is pending (TODO)
    
    Currently every time a RA Update Req or an Attach Req is processed, a
    new P-TMSI is alocated. When an MS issues another of these messages
    before it has completed the first procedure, old_ptmsi is replaced by
    ptmsi (and thus lost) and ptmsi is replaced by the newly allocated
    P-TMSI. This can confuse the gbproxy, which can loose track of the
    logical link then. At least a blackberry emits a double set of RA Upd
    Req messages from time to time which may be just 20ms apart.
    
    This patch adds a check whether mm->ptmsi or mm->old_ptmsi are not
    both set. If both are set, the P-TMSI is not re-allocated. This is
    only the case, if the Complete message has not been received since
    that resets old_ptmsi.
    
    TODO:
     - Test case
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=42ae521031e8d705baf5132471d51780310fb787

commit 42ae521031e8d705baf5132471d51780310fb787
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Tue Sep 30 13:53:26 2014 +0200

    sgsn: Added TODOs (TODO)
    
    TODO:
      - fix and remove TODOs
      - add test cases for Detach(reattach)
      - add test cases for PDP context deletion (OW#1311)
      - add test cases for Cancel pending timer in sgsn_mm_ctx_free
      - remove this commit
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=66789456de5982e1caa053a59037cc45cd853d8a

commit 66789456de5982e1caa053a59037cc45cd853d8a
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Fri Oct 17 10:08:02 2014 +0200

    sgsn: Do not die in _bssgp_tx_dl_ud on TLLI mismatch (TODO)
    
    Currently an OSMO_ASSERT fails, if the message's and the mmctx's
    TLLIs do not match.
    
    This commit turns the assertion into an ERROR log message and uses
    the default values for IMSI, DRX, and RA CAP instead of the MM
    context values in this case.
    
    TODO:
      - find the real source for the problem
      - add test cases derived from what is being described in the ticket
    
    Ticket: OW#1322
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=6d65e861ac5d955ed3746ea513b41a4600bd6ed7

commit 6d65e861ac5d955ed3746ea513b41a4600bd6ed7
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Tue Nov 11 08:55:13 2014 +0100

    sgsn: Don't send XID reset after Detach Accept
    
    Currently when a Detach Accept is received for an unknown TLLI (which
    is in general the case afer the SGSN has requested the detachment),
    an XID reset is sent to the BSS, causing a BSSGP Status message. This
    happens in gsm0408_rcv_gmm.
    
    This patch moves the corresponding call to gprs_llgmm_reset downwards
    so that it is not being called in that case.
    
    Addresses:
    SGSN->BSS TLLI: 0xd75b91d9 SAPI: LLGMM, UI (DTAP) (GMM) Detach Request
    BSS->SGSN TLLI: 0xd75b91d9 SAPI: LLGMM, UI (DTAP) (GMM) Detach Accept
    SGSN->BSS TLLI: 0xd75b91d9 SAPI: LLGMM, U, XID (Reset, IOV-UI)
    BSS->SGSN TLLI: ---        BSSGP STATUS (Unknown MS)
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=e4537ac238e033dc04606139489ee94571fcb991

commit e4537ac238e033dc04606139489ee94571fcb991
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Thu Nov 6 13:43:41 2014 +0100

    sgsn: Cleanup after RA Update Reject / Attach Reject
    
    Currently, the LLME is not cleanup up after sending an RA Update
    Reject. This happens after entering a routing area from outside,
    since in that case the SGSN sends an RA Update Reject (implicitly
    detached) which causes the MS to restart the attach procedure.
    The LLME is also not updated if an Attach Request with message errors
    (encoding, invalid MI type) is received or if an MM context cannot be
    allocated.
    
    This patch changes gsm48_rx_gmm_ra_upd_req and gsm48_rx_gmm_att_req
    to unassign the LLME or free the MM context (if available) after a
    Reject message has been sent.
    
    Ticket: OW#1324
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=6a41825bd4f3d222bae2bf34593c50dcda671882

commit 6a41825bd4f3d222bae2bf34593c50dcda671882
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Tue Nov 4 12:44:15 2014 +0100

    sgsn: Notify an affected MM context if an ACL rule is removed
    
    Currently if an ACL access rule is removed, MS already attached are
    not affected until they try to reattach to the SGSN.
    
    This patch extends sgsn_acl_del to re-authenticate an MM context if
    it matches the IMSI.
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=ad30d8d3b3af86a789e42ab3804f14aba98c43e0

commit ad30d8d3b3af86a789e42ab3804f14aba98c43e0
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Tue Nov 4 10:08:37 2014 +0100

    sgsn: Add 'acl-only' authentication policy
    
    Currently the VTY 'auth-policy' command results in setting or clearing
    the acl_enabled flag. This also enables the matching of the MCC/MNC
    prefix of the IMSI.
    
    This patch adds an additional policy 'acl-only' which disables the
    MCC/MNC matching and relies on the ACL only.
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=49ac6fcf3bd39aa6f1fa19fb199de6e45bf1e2f6

commit 49ac6fcf3bd39aa6f1fa19fb199de6e45bf1e2f6
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Tue Nov 4 11:15:01 2014 +0100

    sgsn/test: Add VTY tests for the SGSN
    
    This patch adds some basic SGSN tests to vty_test_runner.py:
    - check for config tree nodes
    - check specific show commands
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=c11c6b97f6c20739a39edc10cf5988c2583b951e

commit c11c6b97f6c20739a39edc10cf5988c2583b951e
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Fri Oct 24 18:09:54 2014 +0200

    sgsn: Make authorization asynchronous
    
    Currently the authorization of an IMSI is done by checking ACLs
    synchronously which is not feasible when the subscriber data has to
    be retrieved from an external source.
    
    This patch changes this by using a callback when the information is
    available. This is also done when only ACL are checked, in this case
    the callback is invoked from within sgsn_auth_request(). The callback
    function sgsn_update_subscriber_data calls sgsn_auth_update which
    in turn calls either gsm0408_gprs_access_granted or
    gsm0408_gprs_access_denied. gsm48_gmm_authorize is extended by a call
    to sgsn_auth_request when IMSI and IMEI are available but the
    auth_state is unknown.
    
    The change has been successfully tested with single phones (E71 and
    IPhone 5c).
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=40415c5655d5f5b67c557f733f0c47b2d60eae88

commit 40415c5655d5f5b67c557f733f0c47b2d60eae88
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Wed Oct 29 22:12:20 2014 +0100

    sgsn: Move IMSI authorization to gsm48_gmm_authorize
    
    Currently the IMSI is only checked immediately when an Attach Request
    is received that contains an IMSI IE. If it contains a P-TMSI
    instead, access is always granted.
    
    This commit moves the IMSI check to gsm48_gmm_authorize where it is
    applied when IMSI and IMEI have been acquired. This fixes the
    authorization when the Attach Accept doesn't contain an IMSI.
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=be35395defcd81d7661365b97c072711e0e55d23

commit be35395defcd81d7661365b97c072711e0e55d23
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Fri Oct 31 12:27:11 2014 +0100

    sgsn: Fix LLME leak when forcing a reattach
    
    Currently when forceing a reattach by sending a Detach
    Request (reattach), the SGSN waits for the Detach Accept until it
    frees the MM context (if present) and the LLME. If that message gets
    lost or isn't sent by the MS, the LLME is never freed if it isn't
    bound to an MM context.
    
    This patch adds code to free the MM context/LLME when forcing a
    reattachment.
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=a00c3bd090b024f116c6e134b668cade04b535c1

commit a00c3bd090b024f116c6e134b668cade04b535c1
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Fri Oct 31 12:20:49 2014 +0100

    sgsn: Split gsm0408_gprs_force_reattach into 2 functions
    
    This patch replaces gsm0408_gprs_force_reattach(msg, mmctx) by two
    functions
      - gsm0408_gprs_force_reattach(mmctx)
      - gsm0408_gprs_force_reattach_oldmsg(msg)
    
    The old function basically consists of the code of the two new
    functions, where the code patch selected depends on mmctx == NULL,
    which is harder to maintain, less obvious to use, and not consistent
    with many other SGSN functions.
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=62a432c7db59c3004a9fc3272d46a6cc9c4269aa

commit 62a432c7db59c3004a9fc3272d46a6cc9c4269aa
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Mon Nov 3 10:12:52 2014 +0100

    sgsn: Call mm_ctx_cleanup_free to deregister MM context
    
    Currently the MM context isn't always removed when it is
    de-registered (mmctx_timer_cb), mm_state is set to GMM_DEREGISTERED
    instead. This can lead to left-over MM contexts which are only
    cleaned up if the MS reattaches.
    
    This patch replaces all of these assignments by a call to
    mm_ctx_cleanup_free.
    
    Ticket: OW#1324
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=584bf98d87497381ea30526d73899d3a5542eb61

commit 584bf98d87497381ea30526d73899d3a5542eb61
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Tue Oct 28 16:23:46 2014 +0100

    sgsn: Cleanup GMM state transitions
    
    Currently the GMM state is set to GMM-REGISTERED when an Attach
    Accept or a RA Update Accept message is sent, even if a new P-TMSI is
    included. In this case 04.08 requires (see 4.7.3.1.3 and 4.7.5.1.3),
    that the state is set to GMM-COMMON-PROCEDURE-INITIATED when the
    Accept is sent. When the Complete is received, the SGSN shall set
    the state to GMM-REGISTERED.
    
    This patch modifies the state updates accordingly.
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=b8242b0c2422a948fdce005558fc8e5738555ff0

commit b8242b0c2422a948fdce005558fc8e5738555ff0
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Tue Oct 28 12:23:29 2014 +0100

    sgsn: Reorganize and fix gsm48_gmm_authorize
    
    Currently the order of the 'if' clauses in gsm48_gmm_authorize
    doesn't match the order in which the conditional parts are entered.
    This makes it difficult to maintain. In addition the t3350_mode is
    not stored in every path, so that this information is lost when the
    identification procedure is started. Since the default value
    coincidentally is GMM_T3350_MODE_ATT, this doesn't hurt for Attach
    Requests which are the only messages that initially trigger the
    authentication yet.
    
    This patch changes the order of the 'if' clause to match the
    processing order, it removes the t3350_mode parameter entirely and
    introduces a mm->pending_req field. The latter must be set when the
    request that causes the authorization before calling
    gsm48_gmm_authorize. The gprs_t3350_mode enum is extended by
    GMM_T3350_MODE_NONE (value 0, which is the default) to make it
    possible to detect related initialisation errors or race conditions.
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=acc28f5fa7b9c1ad607bddb47429a04a068c14ef

commit acc28f5fa7b9c1ad607bddb47429a04a068c14ef
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Thu Oct 30 17:15:43 2014 +0100

    gbproxy: Reset TLLIs when the link_info is found by IMSI/P-TMSI
    
    Currently when the MS does a re-attach without doing a proper detach
    first, the gbproxy uses the old local TLLI if patching and the keep
    mode are enabled. This leads to a failing attachment procedure when
    TLLI patching is also enabled.
    
    This patch changes gbproxy_update_link_state_ul to reset all TLLIs
    within the link_info if the message contains an unknown TLLI and an
    MI. This is generally the case with Attach Request messages.
    
    The gbproxy_get_link_info_ul gets an additional tlli_is_invalid
    output parameter that is set, when a TLLI was present but not found.
    This value is then used instead of checking tlli.current == 0 to
    handle e.g. Attach Requests when a link_info was already present for
    the P-TMSI/IMSI used in such a request.
    
    Ticket: OW#1324
    Sponsored-by: On-Waves ehf

-----------------------------------------------------------------------

Summary of changes:
 openbsc/contrib/systemd/osmo-bsc.service |   2 +-
 openbsc/include/openbsc/gprs_gmm.h       |   1 +
 openbsc/include/openbsc/gprs_sgsn.h      |  14 ++++
 openbsc/src/gprs/gb_proxy_tlli.c         |  27 ++++---
 openbsc/src/gprs/gprs_gmm.c              |  33 ++++++++-
 openbsc/src/gprs/gprs_sgsn.c             |   9 +--
 openbsc/src/gprs/gprs_subscriber.c       | 105 +++++++++++++++++++++++----
 openbsc/src/gprs/sgsn_auth.c             |  16 ++++-
 openbsc/src/gprs/sgsn_vty.c              | 120 +++++++++++++++++++++++++++++++
 openbsc/src/libbsc/abis_nm.c             |   4 +-
 openbsc/src/libbsc/bsc_ctrl_commands.c   |   5 ++
 openbsc/tests/ctrl_test_runner.py        |  20 ++++++
 openbsc/tests/vty_test_runner.py         |   3 +
 13 files changed, 319 insertions(+), 40 deletions(-)


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