openbsc.git branch neels/gtphub updated. 0.15.0-76-g041995d

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http://cgit.osmocom.org/openbsc/commit/?id=041995dacf26082cb4883a99f8d5a30c109efff7

commit 041995dacf26082cb4883a99f8d5a30c109efff7
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Thu Nov 26 22:19:22 2015 +0100

    gtphub: use file for incremental restart counter.
    
    Force passing a restart counter, by adding such arg to gtphub_start().
    
    In gtphub_main.c, add -r,--restart-file <path> and next_restart_count() to
    maintain the counter file.
    
    While at it, tweak the cmdline help to unify the formatting.

http://cgit.osmocom.org/openbsc/commit/?id=ae1e7a00efcdea016008c54cd442e38c141e4200

commit ae1e7a00efcdea016008c54cd442e38c141e4200
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Thu Nov 26 05:20:18 2015 +0100

    gtphub: complain about excess cmdline args.

http://cgit.osmocom.org/openbsc/commit/?id=cf6ba14087de5ae464528280be3a784f8c6c6d6d

commit cf6ba14087de5ae464528280be3a784f8c6c6d6d
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Thu Nov 26 03:33:29 2015 +0100

    gtphub: track tunnels explicitly.
    
    So far, gtphub worked perfectly by only tracking single TEIs ... for probably
    most uses. But a Ctrl plane tunnel may have expired despite a still active
    corresponding User plane tunnel. The User plane would continue to work
    indefinitely, but if any Ctrl messages followed after more than six hours of
    Ctrl silence, they would have been dropped due to an expired TEI mapping.
    
    We want to
    - combine expiry of a user TEI with its ctrl TEI. (done in this patch)
    - upon delete PDP context, remove both user and ctrl TEI mappings. (future)
    - when a peer indicates a restart counter bump, invalidate its tunnels.
      (future)
    
    To facilitate these, track tunnels, complete with both SGSN's and GGSN's
    address, original and replaced TEIs, all for both user and ctrl plane, in a
    single struct. A single expiry entry handles the entire tunnel, instead of
    previously four separate expiries for each endpoint identifier.
    
    Add the concept of a "side", being either GGSN or SGSN.
    
    Track the originating side in the gtp_packet_desc. For clarity, explicitly
    track the received header TEI in header_tei_rx, since set_tei() overwrites
    header_tei to reflect the packet's replaced header TEI, and the originally
    received header TEI still needs to be used for matching a Create PDP Context
    Response up with its Request (and for logging).
    
    Adjust the test suite to expect tunnel listing strings instead of TEI mappings,
    with a bonus of making it a lot easier to grok and including the IP addresses.
    
    Note: the current implementation is as slow as can possibly be, iterating all
    the tunnels all the time. Optimizations are kept for a future commit, on
    purpose.
    
    BTW, the sequence number mapping/unmapping structures remain unchanged.
    
    Sponsored-by: On-Waves ehi

http://cgit.osmocom.org/openbsc/commit/?id=22174abe556b8419a42b3b67b191ac94e30d81c5

commit 22174abe556b8419a42b3b67b191ac94e30d81c5
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Wed Nov 25 16:50:19 2015 +0100

    gtphub: fix filename mentioned in comment

http://cgit.osmocom.org/openbsc/commit/?id=79dce146fbb4096f737776d5c217b71a31b16eb9

commit 79dce146fbb4096f737776d5c217b71a31b16eb9
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Wed Nov 25 16:45:59 2015 +0100

    gtphub: cosmetic/prepare: rename expiry queues.
    
    The expiry queues are already used for resolved GGSN addresses, and will
    soon enlist tunnel structs. Hence the naming should be more general.

http://cgit.osmocom.org/openbsc/commit/?id=c33ac58604665455699eddb2bad5cfd8242f193c

commit c33ac58604665455699eddb2bad5cfd8242f193c
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Tue Nov 24 13:32:23 2015 +0100

    gtphub: add assertion to ensure expiry ordering.
    
    Make 100% sure the user adds expiring_items in chronological order by asserting
    that a newly added expiry is >= the last expiry in the queue. Add llist_last()
    to facilitate.
    
    Sponsored-by: On-Waves ehi

http://cgit.osmocom.org/openbsc/commit/?id=310b8bf647c8b2478dec3a27c11942cf4b6f1e6a

commit 310b8bf647c8b2478dec3a27c11942cf4b6f1e6a
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Tue Nov 24 13:31:06 2015 +0100

    gtphub: refresh TEI timeout when TEI is used.
    
    Make sure a TEI mapping remains valid when it is in use (so far all mappings
    would expire after 6 hours, in use or not).
    
    Add regression test for this.
    
    Note: this does not yet refresh a Ctrl TEI mapping when a corresponding User
    TEI is used (todo?).
    
    Sponsored-by: On-Waves ehi

http://cgit.osmocom.org/openbsc/commit/?id=97c5e61b0a58a507a5ad5ee0559da9182596d287

commit 97c5e61b0a58a507a5ad5ee0559da9182596d287
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Tue Nov 24 13:30:38 2015 +0100

    gtphub: cosmetic/prepare: add nr_map_refresh().

http://cgit.osmocom.org/openbsc/commit/?id=9586e51efd243cce41a887448bf442f3f49d4c5f

commit 9586e51efd243cce41a887448bf442f3f49d4c5f
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Tue Nov 24 13:27:13 2015 +0100

    gtphub: move timestamp into packet struct.
    
    Instead of passing the current time around in function arguments ('now'),
    rather store the current time once upon decoding a GTP packet in the
    gtp_packet_desc passed around anyway ('p->timestamp').
    
    Sponsored-by: On-Waves ehi

http://cgit.osmocom.org/openbsc/commit/?id=58e14c99f4c6b9be3a7b15c72d0f669b05d713cf

commit 58e14c99f4c6b9be3a7b15c72d0f669b05d713cf
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Tue Nov 24 13:23:44 2015 +0100

    gtphub: cosmetic: fix an argument name.

http://cgit.osmocom.org/openbsc/commit/?id=4395a3d823a2243531ef15d05ef498427d9c409b

commit 4395a3d823a2243531ef15d05ef498427d9c409b
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Fri Nov 20 03:16:19 2015 +0100

    gtphub: first vty show commands.
    
    Start adding VTY commands to show rate counters / statistics / cache dumps.
    
    Sponsored-by: On-Waves ehi

http://cgit.osmocom.org/openbsc/commit/?id=d4c79db2905f6380773adc8d12ddcddc5e21077e

commit d4c79db2905f6380773adc8d12ddcddc5e21077e
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Fri Nov 20 01:28:40 2015 +0100

    gtphub: add first rate counters
    
    Sponsored-by: On-Waves ehi

http://cgit.osmocom.org/openbsc/commit/?id=a5f12d907cc6554b7c1a0e7c63b6a7287796f149

commit a5f12d907cc6554b7c1a0e7c63b6a7287796f149
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Fri Nov 20 01:27:22 2015 +0100

    gtphub: cosmetic: clarify bind pointer naming.
    
    Some gtphub_bind pointers point to an array of binds, some point directly at
    instances. Make the distinction between the two more obvious by adding an
    '_arr' suffix to the array ones.
    
    Partly in preparation for upcoming rate counters.
    
    Sponsored-by: On-Waves ehi

http://cgit.osmocom.org/openbsc/commit/?id=27883dd1891686ed50d9fff017b07416ef785cce

commit 27883dd1891686ed50d9fff017b07416ef785cce
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Fri Nov 20 00:08:28 2015 +0100

    gtphub: add explicit cleanup handles.
    
    Clean up functionality is added for the test suite only, to be able to clean
    out all allocations and test against memory leaks.
    
    So far, it was sufficient to expire everything to free a gtphub. In preparation
    for the upcoming rate counters, which will need to be freed explicitly, add
    gtphub functions to clean up everything.
    
    As added bonus, also close the sockets explicitly -- not really needed upon
    program exit, neither by the test suite, but *if* we have a cleanup function,
    it should clean up everything properly.
    
    Closing the sockets is however kept separate, for the test suite.
    gtphub_start() and gtphub_stop() are for normal use (published in gtphub.h),
    and gtphub_init() and gtphub_free() are for the test suite, without sockets.
    (gtphub_stop() will probably never be called by anyone, but its existence
    completes the picture.)
    
    In gtphub_test.c, have a function to clean up the testing gtphub struct. First,
    expire everything by timeout, assert emptiness, then call the cleanup function.
    Call from each test in the end.
    
    Sponsored-by: On-Waves ehi

http://cgit.osmocom.org/openbsc/commit/?id=f9f6739cece7073aca938b5258ab7d590efd9f0f

commit f9f6739cece7073aca938b5258ab7d590efd9f0f
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Fri Nov 20 00:04:41 2015 +0100

    gtphub: ensure cleanup of peer addresses.
    
    Upon calling gtphub_peer_del(), all addresses and ports should already have
    expired (by force). Make sure the code heeds that with a so far missing
    assertion.
    
    Sponsored-by: On-Waves ehi

http://cgit.osmocom.org/openbsc/commit/?id=d9e3579689f5678d761ac331c152d1286e8f94ef

commit d9e3579689f5678d761ac331c152d1286e8f94ef
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Thu Nov 19 00:44:52 2015 +0100

    gtphub: send gtphub's own restart counter, fix type.
    
    So far, the sender's restart counter was copied through, which would break as
    soon as more than one SGSN or more than one GGSN would talk to the same peer.
    
    Also fix the restart counter data type (just one octet after all).
    
    gtphub should also persist its restart counter and handle peers that have
    rebooted, both of which is still not implemented.
    
    Sponsored-by: On-Waves ehi

http://cgit.osmocom.org/openbsc/commit/?id=c80f953d117a8d2406e37f200bf4aa62ef7d3cf2

commit c80f953d117a8d2406e37f200bf4aa62ef7d3cf2
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Wed Nov 18 18:11:32 2015 +0100

    gtphub: ares vty and init
    
    From sgsn_vty.c, copy the cfg_grx_ggsn_cmd to add an ares server to the static
    sgsn_instance.
    
    This is sort of preliminary. As described in comments, the sgsn_ares functions
    should actually be separated from the static sgsn structure. gtphub keeps such
    an sgsn structure just for the sgsn_ares functions.
    
    Sponsored-by: On-Waves ehi

http://cgit.osmocom.org/openbsc/commit/?id=70cb65941457b29bf811ee570b3cf21ae48e99bc

commit 70cb65941457b29bf811ee570b3cf21ae48e99bc
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Wed Nov 18 18:11:09 2015 +0100

    gtphub: review some logging.
    
    Sponsored-by: On-Waves ehi

http://cgit.osmocom.org/openbsc/commit/?id=3d53bfd7668f491f2904580c33f1a461fa631132

commit 3d53bfd7668f491f2904580c33f1a461fa631132
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Wed Nov 18 17:53:00 2015 +0100

    gtphub: cosmetic: rename a file.
    
    gtphub_ext.c's initial purpose was to wrap a specific function. The file
    then turned into everything related to DNS, which fits pretty well. Rename
    to gtphub_ares.c.
    
    Tweak the header comment to reflect the new file name.
    
    Sponsored-by: On-Waves ehi

http://cgit.osmocom.org/openbsc/commit/?id=e243b5c6b6183d911dc6a9a245e1c95a798ec280

commit e243b5c6b6183d911dc6a9a245e1c95a798ec280
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Tue Nov 17 14:30:37 2015 +0100

    gtphub: nr_map: add min,max and wrap.
    
    Implement min/max bounds for nr_pool, adjust nr_pool_init() and current tests,
    and create unit tests for nr_map wrapping.
    
    Sequence numbers range from 0 to 65535, while TEIs range from 1 to 0xffffffff.
    Both cause problems when the nr_pool surpasses the range: seq exit their valid
    range, causing unmappings to fail, and a TEI would be mapped as zero (invalid).
    
    Add a comment about TEI wrapping, and lose the comment about random TEIs (not
    really important).
    
    Sponsored-by: On-Waves ehi

http://cgit.osmocom.org/openbsc/commit/?id=a63c177aa3ab50a7a00c04ac10ea282376ea4bc7

commit a63c177aa3ab50a7a00c04ac10ea282376ea4bc7
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Tue Nov 17 14:24:46 2015 +0100

    gtphub: fix number map range for TEIs.
    
    Use unsigned int for nr_map, just large enough to fit the TEI space.
    Adjust log output formats and casts accordingly.
    
    Fixes: TEIs are uint32_t, but the nr_map so far used int. This would cause TEIs
    from 0x80000000 on to be handled and printed as a negative value.
    
    Sponsored-by: On-Waves ehi

http://cgit.osmocom.org/openbsc/commit/?id=42acf2cd2cc4ebbd2611c67aeb0744778e0ba72a

commit 42acf2cd2cc4ebbd2611c67aeb0744778e0ba72a
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Wed Nov 18 17:09:22 2015 +0100

    gtphub: add to debian build
    
    By the example of osmo-sgsn, package osmo-gtphub for debian.
    
    Sponsored-by: On-Waves ehi

http://cgit.osmocom.org/openbsc/commit/?id=8fbfaa51bb3f583eeebc1239388832b2e966d424

commit 8fbfaa51bb3f583eeebc1239388832b2e966d424
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Thu Nov 26 22:20:50 2015 +0100

    gtphub: remove another obsolete comment.

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