openbsc.git branch neels/gtphub updated. 0.15.0-26-g44b1267

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Sun Nov 8 23:08:02 UTC 2015

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- Log -----------------------------------------------------------------

commit 44b12671f4f811412fab2298036c83457ac6ed42
Author: Neels Hofmeyr <nhofmeyr at>
Date:   Sun Nov 8 23:39:57 2015 +0100

    gtphub: lose the netcat test.

commit ff2aff90be399d57e26fe2b9d60355d78b93443c
Author: Neels Hofmeyr <nhofmeyr at>
Date:   Sun Nov 8 20:34:47 2015 +0100

    gtphub: add first bits of GRX ares
    For the resolving function, change the function signature to return a
    gtphub_peer_port. In consequence, publish two functions concerned with
    gtphub_peer_port instances for use in test and gtphub_ext.c.
    Add GGSN resolution queue, callback and cache. Simple implementation: if an
    SGSN asks for a GGSN, it will first get no answer, and I hope it will ask again
    once the GGSN is in the cache.
    Within gtphub_ext.c, have a dummy sgsn struct, as the sgsn_ares code currently
    depends on it (half the functions pass an sgsn instance pointer around, but the
    other half use the global one).
    In the unit tests, wrap away the ares initialization so that they can work
    without a DNS server around. The netcat test breaks because of this, will
    remove it.
    Using sgsn_ares, implement the gtphub_resolve_ggsn_addr() function, I hope:
    Minor cosmetics just to see if you're paying attention... ;)

commit 933e2762896ec00872068e5a1d605a1bf14d8e80
Author: Neels Hofmeyr <nhofmeyr at>
Date:   Thu Sep 24 17:32:30 2015 +0200

    Add GTP hub (code bomb).
    First steps towards a new GTP hub. The aim is to mux GTP connections, so that
    multiple SGSN <--> GGSN links can pass through a single point. Background:
    allow having more than one SGSN, possibly in various remote locations.
    The recent addition of OAP to GSUP is related to the same background idea.
    (This is a collapsed patch of various changes that do not make sense to review
    in chronological order anymore, since a lot of it has thorougly transmorphed
    after it was first committed.)
    Sponsored-by: On-Waves ehf
    gtphub: decode IE GSN addr using inet_ntop.
    gtphub: cosmetic: fix a name.
    map addresses wip
    gtphub: fix style: '} else {'
    gtphub: restructure
    Allow multiple addresses per peer.
    Allow multiple ports per address.
    Don't track ctrl<->user plane peers, allow any number of them.
    Have a single TEI map per plane, across all GGSNs and SGSNs. This is not only
    simpler, but necessary to establish mappings during a Create PDP Context
    Request <-> Response (thanks Holger!) -- during a Create PDP Context Request,
    we want to map TEI numbers before sending to the GGSN, but the GGSN has not
    announced its final tunnel endpoint addresses yet. We can't find an unused TEI
    for a given address if we don't know the address. The solution is to have
    globally unique mapped TEIs (per Ctrl / User plane).
    Change naming: "port" to "plane". There's now a gtphub_peer_port, so the "port"
    naming for the planes was confusing.
    Separate expiry from nr_map. It happened along the way, becoming obsolete again
    by the central TEI map, and now the code is there.
    gtphub: cosmetic
    Tweak comment.
    Rename gtphub_sep.c to gtphub_ext.c (personal preference) and add copyright
    Sort some definitions around in gtphub.c.
    In gtphub_from_sgsns_handle_buf, move a variable into the scope where it is
    Remove a debug peer counter.
    gtphub_test: cosmetic
    Rename seq_map_is to nr_map_is.
    gtphub: pull out current time to unit tests.
    An obsolete forward definition is dropped along the way.
    gtphub: publish gtphub_port_find_sa() to enhance test
    gtphub_test: find the GGSN peer struct and verify seq_map entries and timeouts.
    Also verify tei_map entries and timeouts.


Summary of changes:
 openbsc/src/gprs/gtphub.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

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

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