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* gprs_ns_instantiate(): propagate errors from gprs_sns_init() to callerHarald Welte2019-12-011-2/+7
| | | | Change-Id: I71f347a2f0376716e5f83d33a7931eb8a99aad77
* make all library-internal static buffers thread-localHarald Welte2019-06-041-1/+1
| | | | | | | | | | | | | | | We have a number of library-internal static global buffers which are mainly used for various stringification functions. This worked as all of the related Osmocom programs were strictly single-threaded. Let's make those buffers at least thread-local. This way every thread gets their own set of buffers, and it's safe for multiple threads to execute the same functions once. They're of course still not re-entrant. If you need re-entrancy, you will need to use the _c() or _buf() suffix version of those functions and work with your own (stack or heap) buffers. Change-Id: I50eb2436a7c1261d79a9d2955584dce92780ca07
* NS: log address:port on errorMax2019-05-101-2/+2
| | | | Change-Id: If2dc533a6dc150254f5d44b672f04bb728e7e927
* deal with rate_ctr_group_alloc() returning NULLHarald Welte2019-05-081-0/+4
| | | | | Change-Id: I47d6623b9eca704e3c2537cfb5799a4c0749a7bc Related: #3701
* Add _c versions of functions that otherwise return static buffersHarald Welte2019-04-101-0/+8
| | | | | | | | | | | | | | We have a habit of returning static buffers from some functions, particularly when generating some kind of string values. This is convenient in terms of memory management, but it comes at the expense of not being thread-safe, and not allowing for two calls of the related function within one printf() statement. Let's introduce _c suffix versions of those functions where the caller passes in a talloc context from which the output buffer shall be allocated. Change-Id: I8481c19b68ff67cfa22abb93c405ebcfcb0ab19b
* Add _buf() functions to bypass static string buffersHarald Welte2019-04-031-6/+10
| | | | | | | | | | | | | | | We have a number of static buffers in use in libosmo*. This means the related functions are not usable in a thread-safe way. While we so far don't have many multi-threaded programs in the osmocom universe, the static buffers also prevent us from calling the same e.g. string-ify function twice within a single printf() call. Let's make sure there's an alternative function in all those cases, where the user can pass in a caller-allocated buffer + size, and make the 'classic' function with the static buffer a wrapper around that _buf() variant. Change-Id: Ibf85f79e93244f53b2684ff6f1095c5b41203e05
* select: Rename BSC_FD_* constants to OSMO_FD_*Harald Welte2019-03-211-2/+2
| | | | | | | | | | | | The naming of these constants dates back to when the code was private within OpenBSC. Everything else was renamed (bsc_fd -> osmo_fd) at the time, but somehow the BSC_FD_* defines have been missed at the time. Keep compatibility #defines around, but allow us to migrate the applications to a less confusing naming meanwhile. Change-Id: Ifae33ed61a7cf0ae54ad487399e7dd2489986436
* gprs_ns: Don't use initial IP/port for anything but SNSHarald Welte2019-03-161-2/+55
| | | | | | | | | | | | | | | | | | | | | | | Section 6.2.1 of 3GPP TS 48.016 states: > A pre-configured endpoint shall not be used for NSE data or signalling > traffic (with the exception of Size and Configuration procedures) unless > it is configured by the SGSN using the auto-configuration procedures. However, in the current SNS implementation, the initial IP/Port over which we perform the SNS-SIZE + SNS-CONFIG are treated as one of the normal NS-VCs. Specifically, we also perform the NS-ALIVE procedure on it, which is clearly wrong. Let's explicitly create the "initial" NS-VC with data and signalling weight of 0, and ensure we never start the alive timer or send any non-SNS PDUs on this connection as long as SNS was not used to change either of the two weights to non-zero. While at it, also safeguard against processing any incoming non-SNS messages on such a all-zero-weight connection. Change-Id: I16a91a07e5914d123b2ea2f8413b94e7cd518628 Closes: OS#3844
* gprs_ns.c: Update comment: IP SNS has recently been implementedHarald Welte2019-03-161-1/+0
| | | | Change-Id: I8b98621a582a23d0483a5340b4aca7e0bc096e6d
* NS: Add support for GPRS NS IP Sub-Network-Service (SNS)Harald Welte2019-02-261-16/+237
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The NS implementation part of the Gb implementation libosmogb so far implemented a rather classic dialect of Gb, with lots of heritage to FR (Frame Relay) transports. At least since Release 6 of the NS specification, there's an IP Sub-Network Service (SNS), which * permits for dynamic configuration of IP endpoints and their NS-VCs * abandons the concept of a NSVCI on IP transport * forbids the use of RESET/BLOCK/UNBLOCK procedures on IP transport This commit introduces BSS-side IP-SNS support to libosmogb in a minimally invasive way. It adds a corresponding SNS FSM to each NS instance, and implements the new SIZE/CONFIG/ADD/DELETE/CHANGE_WEIGHT procedures very closely aligned with the spec. In order to use the SNS flavor (rather than the classic one), a BSS implementation should use gprs_ns_nsip_connect_sns() instead of the existing gprs_ns_nsip_connect(). This implementation comes with a set of TTCN-3 tests in PCU_Tests_RAW_SNS.ttcn, see Change-ID I0fe3d4579960bab0494c294ec7ab8032feed4fb2 of osmo-ttcn3-hacks.git Closes: OS#3372 Closes: OS#3617 Change-Id: I84786c3b43a8ae34ef3b3ba84b33c90042d234ea
* NS: Factor out gprs_nsvc_start_test() and use itHarald Welte2019-02-261-5/+10
| | | | | | | | | | | | This function performs sending a NS-ALIVE PDU and starting Tns-Test, let's use it in all places where we used to do that. As part of this, also fix a bug where the sendto() return value (number of bytes sent) would actually propagate up all the way to gprs_ns_rx_reset() return value, which in turn affects the test results on stdout. Change-Id: I4d303117f77fabb74bbb91887b9914a81c2a084a
* gprs_ns: Add code for SNS-SIZE and SNS-CONFIG encodingHarald Welte2019-02-261-2/+178
| | | | | | | | | | | Modern NS specifications contain a SNS (Sub Network Service) for negotiating IP/port/weight parameters of NS-over-IP links dynamically. This patch adds message encoding routines for SNS-CONFIG, SNS-SIZE and their respective acknowledgements. Related: OS#3372 Change-Id: I5c47e1c3c10deb89a7470ee2c03adfc174accc93
* NS: Add missing NS Cause stringsHarald Welte2019-02-231-0/+7
| | | | | | | | When I added the definitions for the IP-SNS in commit f030b210e8c13314d361a6b721a0cbcc72935219 back in 2010, I forgot to update the string definitions in ns_cause_str[]. Let's fix that Change-Id: I419ccc482d99b01263a60aede83dacd2d9de56ab
* gprs_ns: Add missing NSVCI IE to NS-BLOCK-ACK messageHarald Welte2019-02-191-1/+29
| | | | | | | | According to Section 9.2.4 of 3GPP TS 48.016, the NS-BLOCK-ACK PDU has a mandatory NSVCI IE which we so far were missing. Change-Id: Ie7205e99d57f1e42d941f1be2460d8c9f46aadfe Closes: OS#3808
* gprs_ns.c: cosmetic whitespace fixesHarald Welte2019-02-191-2/+2
| | | | Change-Id: Ic19f65bdc5527ad5a69d0a92320ce5f672bf4d2b
* gprs_ns: Use gprs_ns_tx_alive() instead of gprs_ns_tx_simple()Harald Welte2019-02-191-2/+2
| | | | | | If we use gprs_ns_tx_alive() we will get logging for free. Change-Id: I53d410d13540d389096c40425e1fa2eb7460b16b
* document unblock-ack vs. signalling in gprs_ns_process_msg()Stefan Sperling2018-11-201-0/+6
| | | | | | | | | | | | | Since commit 797558ea1768e464f9559c5f7a4f3f4285c5de25 we send the NS_UNBLOCK_ACK message before dispatching the NS_UNBLOCK signal, instead of afterwards. Add comments which explain the intended order of events. Suggested-by: Pau Related: OS#2388 Change-Id: I4b93853c952a97302f8afc14f462f22c3e487564
* send NS_POUT_UNBLOCK_ACK before signalling S_NS_UNBLOCKStefan Sperling2018-11-191-1/+3
| | | | | | | | | | | | | | | | | | | | | In gprs_ns_process_msg(), we were dispatching the S_NS_UNBLOCK signal before sending out the NS_POUT_UNBLOCK_ACK message. Signal handlers might send messages to the other side, assuming that NS is now unblocked. However, since such messages will arrive before the UNBLOCK_ACK message the receiver might discard them. This problem has been observed with our TTCN3 BSSGP_Emulation as a peer to osmo-pcu. This patch makes TTCN3 PCU TC_paging() test pass regardless of whether the test or osmo-pcu is started first. Before this patch, this test would only pass if the test was started before osmo-pcu. A remaining problem is that the test does not yet keep passing reliably unless osmo-pcu is restarted between test runs. Change-Id: I3af54a14bb6bcfa167c9a9d9f67835e7f5b9f1bb Related: OS#2890 Related: OS#2388
* fix error handling gprs_ns_nsip_listen()Stefan Sperling2018-10-101-1/+4
| | | | | | | | | If we cannot bind the listening socket, reset related fields in the osmo fd structure to NULL again. Otherwise our caller might eventually try to use an uninitialized osmo fd. Change-Id: Ia953b2eff54cac0bd980944291f75db14df09a34 Related: OS#3643
* use __FILE__, not __BASE_FILE__Neels Hofmeyr2018-08-201-2/+2
| | | | | | | | | | | | | | | The intention was to use the file's basename, but __BASE_FILE__ means "the root file that is being parsed and contains #include statements". If we had a function using __BASE_FILE__ and that was defined in an #included file, __BASE_FILE__ would indicate the first file where the #include is, and not the file where the function is defined. __BASE_FILE__ works for us because we don't ever include function definitions that log something, so __BASE_FILE__ always coincides with __FILE__ for our logging; but still __BASE_FILE__ is semantically the wrong constant. Related: OS#2740 Change-Id: Ibc1d3746f1876ac42d6b1faf0e5f83bd2283cdcc
* Add function gprs_nsvc_state_appendDaniel Willmann2018-06-141-0/+22
| | | | | | A common function to append the nsvc state from osmo-sgsn or osmo-gbproxy Change-Id: I7f0eaff7329ab98cad792d30b20ab053007aab85
* Fix/Update copyright notices; Add SPDX annotationHarald Welte2017-11-131-1/+4
| | | | | | | | Let's fix some erroneous/accidential references to wrong license, update copyright information where applicable and introduce a SPDX-License-Identifier to all files. Change-Id: I39af26c6aaaf5c926966391f6565fc5936be21af
* GPRS: constify NS printing routine parametersMax2017-10-241-1/+1
| | | | Change-Id: I549ab7c26ac1489e01f281594bafe44b0681dc83
* Convert lib-internal rate_ctr from '.' separator to ':' separatorHarald Welte2017-10-241-7/+7
| | | | | | | | The rate_ctr.c code would do this mangling automatically, but let's avoid using this from new versions of our code for simplicity/explicitness. Change-Id: I24a556f447cfac25efb6e83cac2d0c2972d98fe3
* GPRS: clarify ip/frgre union useMax2017-10-241-3/+15
| | | | | | | | | * add comment about underlying assumption that structs in ip/frgre union members in gprs_nsvc struct have the same memory layout * remove such assumption from gprs_ns_ll_str() * use gprs_ns_ll_str() for NSE dump Change-Id: Idcb912b7b3f7460fd2b058e16650c0bde8f757ee
* GPRS: wrap NS state assignment in macroMax2017-10-241-14/+35
| | | | | | | | This enables logging for every state transition which makes NS troubleshooting easier. Change-Id: I5d6eaef0432d9be810bf93d07e40787b9ca59142 Related: SYS#3610
* gb: optionally allow nsip packets only from a specific hostPhilipp Maier2017-10-241-3/+25
| | | | | | | | | | | | | | When listening for nsip connections is enabled, then every remote host may send packets. This is useful for an SGSN that serves multiple PCUs, but contraproductive for a PCU that awaits packets from a single SGSN. Add struct members remote_ip, and remote_port to struct gprs_ns_inst, when set, then the listening end uses connect() to ensure that only the expected host may send packets. Related: OS#2401 Change-Id: Ifeb201d9006eec275a46708007ff342cdfc14e45
* GPRS: log NS socketMax2017-10-231-0/+1
| | | | | | | Let's log NS UDP socket creation similar to the way we log it for telnet and ctrl interfaces. Change-Id: Ic9d0f94ab2c1bb33f67cd4f1c9236b64108c0bb6
* doxygen: unify use of \file across the boardNeels Hofmeyr2017-06-231-28/+26
| | | | | | | | | | | | | | | | | Considering the various styles and implications found in the sources, edit scores of files to follow the same API doc guidelines around the doxygen grouping and the \file tag. Many files now show a short description in the generated API doc that was so far only available as C comment. The guidelines and reasoning behind it is documented at https://osmocom.org/projects/cellular-infrastructure/wiki/Guidelines_for_API_documentation In some instances, remove file comments and add to the corresponding group instead, to be shared among several files (e.g. bitvec). Change-Id: Ifa70e77e90462b5eb2b0457c70fd25275910c72b
* doxygen: enable AUTOBRIEF, drop \briefNeels Hofmeyr2017-06-231-19/+19
| | | | | | | | | | Especially for short descriptions, it is annoying to have to type \brief for every single API doc. Drop all \brief and enable the AUTOBRIEF feature of doxygen, which always takes the first sentence of an API doc as the brief description. Change-Id: I11a8a821b065a128108641a2a63fb5a2b1916e87
* update/extend doxygen documentationHarald Welte2017-06-121-1/+1
| | | | | | | | | It's a pity that even with this patch we still are fare away from having the whole API documented. However, at least we have a more solid foundation. Updates not only extend the documentation, but also make sure it is rendered properly in the doxygen HTML. Change-Id: I1344bd1a6869fb00de7c1899a8db93bba9bafce3
* Add human-readable names for signal_nsMax2017-05-241-0/+10
| | | | | Change-Id: Id664355eb8305fb287e4dae0800fb20dc2f9b8cd Related: SYS#3610
* libosmogb: Convert to use new endian conversion helpersHarald Welte2017-05-151-15/+16
| | | | Change-Id: I5ed17702cd9487e1cab6bae39802aa11fb6a37b0
* timer: add osmo_timer_setup()Pablo Neira Ayuso2017-05-091-2/+1
| | | | | | | | | | | | | | | Add a new function timer function to set up the timer, similar to what we have in the Linux kernel. This patch also converts existing opencoded timer setup in the libosmocore tree as initial client of this new function. This patch implicitly removes function callback passed by reference that defeat compile time type validation. Compile-tested only, but I ran make check that reports success when testing timer infrastructure. Change-Id: I2fa49972ecaab3748b25168b26d92034e9145666
* gprs: add value strings for NS PDU typeMax2017-05-091-2/+26
| | | | | | | | Add value strings for Service Control PDUs according to 3GPP TS 48.016 ยง9 and use them for logging. Change-Id: I0ea3a45f35d68619d4cfa9735ef77abd9f9f0d58 Related: SYS#3610
* fix spelling in API docu, command reply, logging, descriptionsThorsten Alteholz2017-04-231-1/+1
| | | | | | sections: ctrl, gb, gsm, vty Change-Id: Iac211b5cd8504da36b699777b95a2448dd7c3e70
* logging.h: fixup: shorter names for LOGGING_FILTER_* and LOGGING_CTX_*Neels Hofmeyr2017-02-231-16/+16
| | | | | | | | | | | | | | | My recent logging patch was merged to master a bit too soon. Accomodate the request for naming that matches the general "LOG" prefix instead of "LOGGING". libosmocore will not be backwards-compatible with the few commits from change-id I5c343630020f4b108099696fd96c2111614c8067 up to this one. This and following commits are backwards compatible with those before that short window. See also: * openbsc change-id Ib2ec5e4884aa90f48051ee2f832af557aa525991 * osmo-pcu change-id I4db4a668f2be07f3d55f848d38d1b490d8a7a685 Change-Id: I424fe3f12ea620338902b2bb8230544bde3f1a93
* logging: centrally define ctx and filter indexesNeels Hofmeyr2017-02-221-16/+16
| | | | | | | | | | | | | | | | | | | | | | | It is too easy for calling code to use the same filter and context indexes for different filters and structs. For example, openbsc's IMSI filter and libgb's GPRS_BVC filter both fall on index 1 even though there are plenty more indexes to choose from. To alleviate this, have one central definition here, sort of like ports.h does for VTY and CTRL port numbers. Add static asserts to make sure the indexes fit in the available array and bit mask space. Calling code like openbsc.git and osmo-pcu need adjustments and/or should move to using these enum values instead of their local definitions. Taking this opportunity to also prepare for a split of struct gsm_subscriber in openbsc into bsc_subsciber and vlr_subscriber with appropriate separate filter index constants for both subscriber types. Include previous LOG_FILTER_ALL in the LOGGING_FILTER_* enum, and replace its use by (1 << LOGGING_FILTER_ALL). Change-Id: I5c343630020f4b108099696fd96c2111614c8067
* add osmo_gettimeofday as a shim around gettimeofdayNeels Hofmeyr2016-09-221-2/+2
| | | | | | | This allows feeding a custom time for unit tests by overriding osmo_gettimeofday. Change-Id: Ic7a81a6eb51f27fe452962b91f2eae2070d87089
* Fix unaligned access found by addr. sanitizerMax2016-04-241-2/+2
| | | | | | | | gprs_bssgp.c:461:9: runtime error: load of misaligned address 0x62100001a66b for type 'uint32_t', which requires 4 byte alignment gprs_ns.c:937:16: runtime error: load of misaligned address 0x61d00002a97f for type 'uint16_t', which requires 2 byte alignment
* ns: Force a defined state when sending NS RESETJacob Erlbeck2015-12-171-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | Currently the state is assumed to remain the same while the reset procedure is active. While this works correctly in general, a single unexpected BLOCK_ACK or UNBLOCK_ACK can change the state but will not stop the reset procedure. The leads to repeated RESET messages, where the corresponding RESET_ACK is ignored. This is a stable state which can only be left by manual intervention or by reception of a RESET message from the peer. This commit changes the RESET timeout handler to set the state to BLOCKED/RESET when sending the new NS RESET message. Note that this should ensure a clean restart even if the state has been screwed up. It does not fix the handling of BLOCK_ACK or UNBLOCK_ACK in abnormal cases. Addresses: gprs_ns.c:349 NSEI=8895 Tx NS RESET (NSVCI=8895, cause=O&M intervention) gprs_ns.c:878 NSVCI=8895 Rx NS RESET ACK (NSEI=8895, NSVCI=8895) gprs_ns.c:887 NS RESET ACK Discarding unexpected message for NS-VCI 8895 from SGSN NSEI=8895 Ticket: OW#1551 Sponsored-by: On-Waves ehf
* ns/stats: Add missing osmo_stat_item_group_free to gprs_nsvc_deleteJacob Erlbeck2015-12-171-0/+1
| | | | | | | | | | | | | | | | | | | | | The stat item group is not removed by gprs_nsvc_delete which will corrupt the group list. Addresses: valgrind tests/gbproxy/gbproxy_test [...] ==4541== Invalid write of size 4 ==4541== at 0x4071ACA: __llist_add (linuxlist.h:65) ==4541== by 0x4071ACA: llist_add (linuxlist.h:81) ==4541== by 0x4071ACA: osmo_stat_item_group_alloc (stat_item.c:112) ==4541== by 0x407EDFD: gprs_nsvc_create (gprs_ns.c:244) ==4541== by 0x408109D: gprs_ns_instantiate (gprs_ns.c:1388) ==4541== by 0x804CFD3: test_gbproxy_ident_changes (gbproxy_test.c:1501) ==4541== by 0x805FBD3: main (gbproxy_test.c:5803) Sponsored-by: On-Waves ehf
* gprs-ns/stats: When the NSVCI is updated, update the stats counterHolger Hans Peter Freyther2015-11-041-0/+2
| | | | | | | | | | | The NS object is created with an unknown identity and only after the reset procedure has progressed (completed?) we know the real ID for this peer. Before nobody has looked at the idx values (this could have been seen with the CTRL interface) but with statsd the wrong NSVCI becomes obvious. Add routines to update the idx and I don't know if the change of idx is causing any issues but we will find that out soon.
* ns/stats: Fix class_id of "NSVC Peer Statistics" rate_ctr groupJacob Erlbeck2015-08-221-0/+1
| | | | | | | | | Currently the class_id is not set which effectively puts these groups into the 'subscriber' class. This commit adds the missing initialisation value. Sponsored-by: On-Waves ehf
* stats: Limit reporting by class idJacob Erlbeck2015-11-021-0/+2
| | | | | | | | | | | | | | | This commit adds class_id fields to the rate_ctr and stat_item group descriptions. The stats reporter code is extended to only process groups whose class_id does not exceed a per reporter max_class level. If the class_id is not set, the code assumes 'global' for groups with idx == 0 and 'subscriber' otherwise. The following vty command is added to config-stats: level (global|peer|subscriber) Set the maximum group level Sponsored-by: On-Waves ehf
* stats: Add osmo_ name prefix to identifiersJacob Erlbeck2015-11-021-4/+4
| | | | | | | | | | Since the the stat_item and stats functions and data types are meant to be exported, they get an osmo_ prefix. Sponsored-by: On-Waves ehf [hfreyther: Prepended the enum values too. This was requested by Jacob]
* ns: Add statistics for some eventsJacob Erlbeck2015-10-281-0/+36
| | | | | | | | | | | | The following counters are added to the ns.nsvc counter group: lost.alive The number of missing ALIVE ACK messages lost.reset The number of missing RESET ACK messages The following items are added to the ns.nsvc stat item group: alive.delay The time in ms between sending ALIVE and receiving the next ALIVE ACK Sponsored-by: On-Waves ehf
* ns: Log when sending fails (Coverity)Jacob Erlbeck2015-04-071-0/+19
| | | | | | | | | | | | | | | | Currently the return value of the gprs_ns_tx family of functions is often ignored. This is not a serious issue, since the successful delivery of the messages is neither guaranteed nor acknowledged by the network layer anyway. Nevertheless this commit adds logging (level INFO) to gprs_ns_tx and gprs_ns_msgb_alloc. The definition of the latter has been moved from the header file to gprs_ns.c. Fixes: Coverity CID 1040678, 1040679, 1040680, 1040681, 1040682, 1040683, 1040684, 1040686, 1040687, 1040688, 1111545, 1240203, 1240204 Sponsored-by: On-Waves ehf
* Change license of libosmogb from AGPLv3+ to GPLv2+Harald Welte2014-10-261-4/+4
| | | | | | | | | | | The copyright holders Harald Welte, Holger Freyther, Andreas Eversberg and sysmocom - s.f.m.c. GmbH (represented by Holger and Harald) agree that the license of libosmogb should be GPLv2+ and not AGPLv3+. The reason the source files stated AGPLv3+ is due to the history, as they were moved from OpenBSC to libosmocore at the time we needed to use them from osmo-pcu. It was an oversight back then to not re-license them accordingly.
* gprs-ns: Fix reset state handlingJacob Erlbeck2014-10-091-5/+4
| | | | | | | | | | | | | | | | | | | | Currently the NS-VC's state is updated from within gprs_ns_tx_reset, which can lead to an inconsistent state when the RESET_ACK is lost. In this state, the NSE_S_RESET bit is set but the Tns-reset timer is not started. This patch moves the state update into gprs_nsvc_reset. This way, the state flags are consistent with the timer. Addresses: SGSN -> BSS NS_ALIVE BSS -> SGSN NS_ALIVE_ACK BSS -> SGSN BVC_RESET SGSN -> BSS NS_ST