openbsc.git branch neels/bind updated. 0.15.0-179-g7597337

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Wed Feb 24 19:45:51 UTC 2016

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commit 7597337ddf523f5b95c8d8d2b8ba56c4caaf759a
Author: Neels Hofmeyr <nhofmeyr at>
Date:   Wed Feb 24 19:15:39 2016 +0100

    smpp: refactor initialization, add bind address
    Make the SMPP bind address configurable (used to be harcoded as "").
    Add VTY command
         local-tcp A.B.C.D <1-65535>
    while keeping the old command 'local-tcp-port <1-65535>'. Both the old and the
    new command immediately change the SMPP listening address and port.
    Add a LOGL_NOTICE log when the SMPP listening address and/or port change.
    However, to be useful, this patch has to go somewhat further: refactor the
    initialization procedure, because it was impossible to run the VTY commands
    without an already established connection.
    The SMPP initialization procedure was weird. It would first open a connection
    on the default port, and a subsequent VTY port reconfiguration while reading
    the config file would try to re-establish a connection on a different port. If
    that failed, smpp would switch back to the default port instead of failing the
    program launch as the user would expect. If anything else ran on port 2775,
    SMPP would thus refuse to launch despite the config file having a different
    port: the first bind would always happen on Change that.
    In the VTY commands, merely store address and port if no fd is established yet.
    Introduce several SMPP initialization stages:
    * allocate struct and initialize pointers,
    * then read config file without immediately starting to listen,
    * and once the main program is ready, start listening.
    After that, the VTY command behaves as before: try to re-establish the old
    connection if the newly supplied address and port don't work out. I'm not
    actually sure why this switch-back behavior is needed, but fair enough.
    In detail, replace the function
    with the various steps
      smpp_smsc_alloc_init() -- prepare struct for VTY commands
      smpp_smsc_conf() -- set addr an port only, for reading the config file
      smpp_smsc_start() -- establish a first connection, for main()
      smpp_smsc_restart() -- switch running connection, for telnet VTY
      smpp_smsc_stop() -- tear down connection, used by _start() twice
    And replace
    I'd have picked function names like "_bind"/"_unbind", but in the SMPP protocol
    there is also a bind/unbind process, so instead I chose the names "_start",
    "_restart" and "_stop".
    The smsc struct used to be talloc'd outside of smpp_smsc_init(). Since the smsc
    code internally uses talloc anyway and employs the smsc struct as talloc
    context, I decided to enforce talloc allocation within smpp_smsc_alloc_init().
    Be stricter about osmo_signal_register_handler() return codes.


Summary of changes:
 openbsc/src/libmsc/smpp_smsc.c | 3 +++
 1 file changed, 3 insertions(+)

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

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