openbsc.git branch jerlbeck/wip/sgsn-rand created. 0.15.0-3-gbf75079

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http://cgit.osmocom.org/openbsc/commit/?id=bf75079907d8c7db347d763927303fc624e97ec4

commit bf75079907d8c7db347d763927303fc624e97ec4
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Mon Oct 12 14:53:05 2015 +0200

    sgsn/test: Really parse received DL LLC messages
    
    Currently just the number of intercepted downlink messages is counted
    and eventually checked. The contents of the messages is lost. The
    PTMSI contained in ATTACH/RAU Accept messages is just 'guessed' be
    resetting the random number generator after reference PTMSIs have
    been generated. While this works with rand_r, RAND_bytes cannot be
    forced this way to recreate a certain number sequence (unless the
    backend is replaced).
    
    This commit changes this behaviour so that the last received msgb is
    kept and decoded. The PTMSI that has been assigned by the SGSN is
    then taken in the affected test cases and used instead of a 'guessed'
    one. This is similar to how a real MS would react to the Accept
    message.
    
    Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/openbsc/commit/?id=373e2440a428b604126a3f375672fa8256c229e0

commit 373e2440a428b604126a3f375672fa8256c229e0
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date:   Mon Oct 12 14:49:31 2015 +0200

    sgsn/test: Add and call cleanup_test function
    
    This (currently empty) function is meant to contain code that cleans
    up the left-overs of the test functions. This will be needed by the
    next commit that will store the last received msgb for later inspection.
    
    Sponsored-by: On-Waves ehf

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