openbsc.git branch zecke/features/rtp-bridge updated. 0.14.0-185-g53122b0

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Mon Sep 14 08:12:40 UTC 2015

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

commit 53122b09d0e0890aa656e0d23a879bd61999d4fb
Author: Holger Hans Peter Freyther <holger at>
Date:   Thu Aug 20 19:10:58 2015 +0200

    mncc: Use the default codec from the built-in mncc mode
    In case of the RTP bridge mode we need to select the codec
    ourselves. Rely on the same (incomplete) codec selection that
    can be done using the mncc-int configuration node. This might
    gain bearer capabilities support.
    In case of a SDCCH a TCH/F will be attempted to be assigned.
    This is an open issue for both modes and there should be a
    preference for full or half-rate channels somewhere.

commit c21dcb20e5a7e5f9317ac797d03639c191de4eae
Author: Holger Hans Peter Freyther <holger at>
Date:   Tue Aug 4 14:41:21 2015 +0200

    mncc: Implement CRCX->MDCX for handover for direct rtp mode
    Implement sending MDCX on the newly allocated channel and send
    the data to the same destination as the currently connected one.
    This way the receiver can implement RTP RFC Appendix A.1 and
    deal with the new source.

commit c8a6c13e4ee0c4355a685a03b892dce5e5e07752
Author: Holger Hans Peter Freyther <holger at>
Date:   Tue Aug 4 13:32:09 2015 +0200

    mncc: Implement the direct RTP mode for ip based systems
    For the LCR rtp-bridge audio should directly flow to the
    remote system. In contrast to the original patch audio
    will now flow directly from the BTS to the remote system.
    This assumes that BTS and the remote system are in the
    same network segment and can directly communicate.
    There are various limitations in the first iteration of
    the implementation:
    We could (and in the future) should delay the assignment
    but currently we are forced to pick the channel and move
    it to the audio state. In case we are located on a SDCCH
    we always need to change but if we are on a TCH we could
    send the ipa.CRCX and change the audio state a lot later.
    The net effect is that the audio codec selection needs to
    be done in the NITB code and not in the system connected
    to it.
    This only works with ip based systems. For E1 systems one
    could still use the RTP socket or even try to move this
    out of the process.
    There is no code for handover handling and it relies on
    the remote system dealing with the SSRC change of the

commit ffbf45e09e400e934d0f507c8b2e252cdb6ac395
Author: Holger Hans Peter Freyther <holger at>
Date:   Tue Jul 14 16:03:41 2015 +0200

    mncc: Update the protocol to match LCR
    This adds the protocol definition for the RTP bridge extension
    of Andreas Eversberg and bumps the protocol version.
    I added the missing mncc mappings from value to string.
    [ 5cf8fb10ea3addcae74d37f4dbf1c1be664df53e protocol extension
      5dac90de38990b188f499c602bf18a4f232070e8 payload extension]


Summary of changes:
 debian/control                            |   2 +-
 debian/rules                              |   2 +-
 openbsc/include/openbsc/bsc_api.h         |   5 +-
 openbsc/include/openbsc/bsc_nat.h         |   2 +-
 openbsc/include/openbsc/gsm_04_08.h       |  14 ++
 openbsc/include/openbsc/gsm_data.h        |  10 -
 openbsc/include/openbsc/gsm_data_shared.h |   5 +-
 openbsc/include/openbsc/meas_feed.h       |  14 +-
 openbsc/include/openbsc/mgcp.h            |   7 +
 openbsc/include/openbsc/mgcp_internal.h   |  82 +++++++-
 openbsc/include/openbsc/mgcp_transcode.h  |   3 +-
 openbsc/include/openbsc/sgsn.h            |  15 ++
 openbsc/src/gprs/gprs_gmm.c               | 113 +++++------
 openbsc/src/gprs/gprs_llc.c               |   2 +-
 openbsc/src/gprs/sgsn_vty.c               |  93 +++++++++
 openbsc/src/libbsc/abis_rsl.c             |  17 +-
 openbsc/src/libbsc/bsc_api.c              |  13 +-
 openbsc/src/libbsc/bsc_init.c             |   3 -
 openbsc/src/libbsc/bsc_vty.c              |  17 ++
 openbsc/src/libbsc/bts_ipaccess_nanobts.c |   4 +
 openbsc/src/libbsc/chan_alloc.c           |   2 +-
 openbsc/src/libbsc/gsm_04_08_utils.c      |  33 ++--
 openbsc/src/libbsc/handover_logic.c       |   2 +-
 openbsc/src/libbsc/system_information.c   |  10 +-
 openbsc/src/libcommon/gsm_data.c          |   2 +
 openbsc/src/libmgcp/           |   3 +-
 openbsc/src/libmgcp/mgcp_network.c        |  29 +--
 openbsc/src/libmgcp/mgcp_osmux.c          |   7 +
 openbsc/src/libmgcp/mgcp_protocol.c       | 240 ++---------------------
 openbsc/src/libmgcp/mgcp_sdp.c            | 305 ++++++++++++++++++++++++++++++
 openbsc/src/libmgcp/mgcp_transcode.c      |  26 +++
 openbsc/src/libmgcp/mgcp_vty.c            |  62 ++++++
 openbsc/src/libmsc/gsm_04_08.c            |  49 +++--
 openbsc/src/libmsc/gsm_04_11.c            |   2 +
 openbsc/src/libmsc/meas_feed.c            |   9 +
 openbsc/src/osmo-bsc/osmo_bsc_api.c       |  14 +-
 openbsc/src/osmo-bsc/osmo_bsc_filter.c    |   4 +-
 openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c |  19 +-
 openbsc/tests/bsc-nat/bsc_data.c          |   4 +-
 openbsc/tests/mgcp/mgcp_test.c            |  81 ++++++++
 openbsc/tests/          |  22 +++
 41 files changed, 929 insertions(+), 419 deletions(-)
 create mode 100644 openbsc/src/libmgcp/mgcp_sdp.c

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

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