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* add osmo_str_startswith()Neels Hofmeyr2019-04-112-11/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move from a static implementation in tdef_vty.c to utils.c, I also want to use this in osmo-msc. The point is that the telnet VTY allows unambiguous partly matches of keyword args. For example, if I have a command definition of: compare (apples|oranges) then it is perfectly legal as for the vty parser to write only compare app One could expect the VTY to then pass the unambiguous match of "apples" to the parsing function, but that is not the case. Hence a VTY function implementation is faced with parsing a keyword of "app" instead of the expected "apples". This is actually a very widespread bug in our VTY implementations, which assume that exactly one full keyword will always be found. I am now writing new commands in a way that are able to manage only the starts of keywords. Arguably, strstr(a, b) == a does the same thing, but it searches the entire string unnecessarily. Change-Id: Ib2ffb0e9a870dd52e081c7e66d8818057d159513
* make osmo_sockaddr_str_is_set() NULL-safeNeels Hofmeyr2019-04-111-1/+2
| | | | | | Obviously a NULL pointer should return false instead of segfaulting. Change-Id: Iac025cf4d556cbed99f3924cd9ca05a05881cd9a
* fsm: support graceful osmo_fsm_inst_term() cascadesNeels Hofmeyr2019-04-111-6/+142
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add global flag osmo_fsm_term_safely() -- if set to true, enable the following behavior: Detect osmo_fsm_inst_term() occuring within osmo_fsm_inst_term(): - collect deallocations until the outermost osmo_fsm_inst_term() is done. - call osmo_fsm_inst_free() *after* dispatching the parent event. If a struct osmo_fsm_inst enters osmo_fsm_inst_term() while another is already within osmo_fsm_inst_term(), do not directly deallocate it, but talloc-reparent it to a separate talloc context, to be deallocated with the outermost FSM inst. The effect is that all osmo_fsm_inst freed within an osmo_fsm_inst_term() cascade will stay allocated until all osmo_fsm_inst_term() are complete and all of them will be deallocated at the same time. Mark the deferred deallocation state as __thread in an attempt to make cascaded deallocation handling threadsafe. Keep the enable/disable flag separate, so that it is global and not per-thread. The feature is showcased by fsm_dealloc_test.c: with this feature, all of those wild deallocation scenarios succeed. Make fsm_dealloc_test a normal regression test in testsuite.at. Rationale: It is difficult to gracefully handle deallocations of groups of FSM instances that reference each other. As soon as one child dispatching a cleanup event causes its parent to deallocate before fsm.c was ready for it, deallocation will hit a use-after-free. Before this patch, by using parent_term events and distinct "terminating" FSM states, parent/child FSMs can be taught to wait for all children to deallocate before deallocating the parent. But as soon as a non-child / non-parent FSM instance is involved, or actually any other cleanup() action that triggers parent FSMs or parent talloc contexts to become unused, it is near impossible to think of all possible deallocation events ricocheting, and to avoid running into freeing FSM instances that were still in the middle of osmo_fsm_inst_term(), or FSM instances to enter osmo_fsm_inst_term() more than once. This patch makes deallocation of "all possible" setups of complex cross referencing FSM instances easy to handle correctly, without running into use-after-free or double free situations, and, notably, without changing calling code. Change-Id: I8eda67540a1cd444491beb7856b9fcd0a3143b18
* fsm: add flag to ensure osmo_fsm_inst_term() happens only onceNeels Hofmeyr2019-04-111-0/+6
| | | | | | | | | | | To prevent re-entering osmo_fsm_inst_term() twice for the same osmo_fsm_inst, add flag osmo_fsm_inst.proc.terminating. osmo_fsm_inst_term() sets this to true, or exits if it already is true. Update fsm_dealloc_test.err for illustration. It is not relevant for unit testing yet, just showing the difference. Change-Id: I0c02d76a86f90c49e0eae2f85db64704c96a7674
* gsm_utils.c: fix Doxygen description for gsm_get_octet_len()Vadim Yanitskiy2019-04-111-4/+4
| | | | Change-Id: Id6fd2cd33be1cb7cd7ff6a43bfcfb1f368304522
* vty/talloc_ctx_vty.c: use REG_NOSUB flag of regcomp()Vadim Yanitskiy2019-04-111-1/+1
| | | | | | | We don't need to know position of matches: just yes or no. This change would save some computation power. Change-Id: Id55ffe64cc1a35dd83f61dbb0f9828aa676696f9
* vty/talloc_ctx_vty.c: allocate walk_cb_params on stack, not heapVadim Yanitskiy2019-04-111-43/+15
| | | | | | There is no need to allocate struct 'walk_cb_params' dynamically. Change-Id: I96f25f1ddb36b19b12055deaeeb6f58e59180e72
* Add _c versions of functions that otherwise return static buffersHarald Welte2019-04-1014-11/+419
| | | | | | | | | | | | | | 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 osmo_use_count APINeels Hofmeyr2019-04-082-0/+280
| | | | | | | | | | | | | | | | | | | | | | | | | Provide a common implementation of use counting that supports naming each user as well as counting more than just one use per user, depending on the rules the caller implies. In osmo-msc, we were originally using a simple int counter to see whether a connection is still in use or should be discarded. For clarity, we later added names to each user in the form of a bitmask of flags, to figure out exactly which users are still active: for logging and to debug double get / double put bugs. This however is still not adequate, since there may be more than one CM Service Request pending. Also, it is a specialized implementation that is not re-usable. With this generalized implementation, we can: - fix the problem of inadequate counting of multiple concurrent CM Service Requests (more than one use count per user category), - directly use arbitrary names for uses like __func__ or "foo" (no need to define enums and value_string[]s), - re-use the same code for e.g. vlr_subscr and get fairly detailed VLR susbscriber usage logging for free. Change-Id: Ife31e6798b4e728a23913179e346552a7dd338c0
* add osmo_sockaddr_str APINeels Hofmeyr2019-04-082-1/+381
| | | | | | | | | | | | | | | | | | | | | | | | For handling RTP IP addresses and ports, osmo-mgw, osmo-bsc and osmo-msc so far have their own separate shims and code duplication around inet_ntoa(), htons(), sockaddr conversions etc. Unify and standardize with this common API. In the MGW endpoint FSM that was introduced in osmo-bsc and which I would like to re-use for osmo-msc (upcoming patch moving that to osmo-mgw), it has turned out that using char* IP address and uint16_t port number types are a convenient common denominator for logging, MGCP message composition and GSM48. Ongoing osmo-msc work also uses this for MNCC. This is of course potentially useful for any other IP+port combinations besides RTP stream handling. Needless to say that most current implementations will probably stay with their current own conversion code for a long time; for current osmo-{bsc,msc,mgw} work (MGW endpoint FSM) though, I would like to move to this API here. Change-Id: Id617265337f09dfb6ddfe111ef5e578cd3dc9f63
* gsm_utils: fix use buf_len instead of sizeof in osmo_dump_gsmtime_bufPhilipp Maier2019-04-081-1/+1
| | | | | | | | | | The function osmo_dump_gsmtime_buf gets a pointer *buf and a parameter buf_len. The pointer *buf is a string buffer and the function places an \0 at the end of the buffer before it exists. However it uses sizeof(buf) as part of the index calculation, which is incorrect. Lets correct this by using buf_len instead. Change-Id: Id24263aa7c9a53544f1639b6ceb09ce5615d5114
* Add _buf() functions to bypass static string buffersHarald Welte2019-04-0313-117/+337
| | | | | | | | | | | | | | | 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
* osmo_escape_str_buf: Always copy, don't return input string pointerHarald Welte2019-03-291-19/+8
| | | | | | | | | | | osmo_escape_str_buf() used to have the somewhat odd semantics that if no escaping was needed, it would return the original pointer without making any copy to the output buffer. While this seems like an elegant optimization, it is a very strange behavior and it works differently than all of our other *_buf() functions. Let's unify the API and turn osmo_escape_str_buf() into a strlcpy() if no escaping is needed. Change-Id: I3a02bdb27008a73101c2db41ac04248960ed4064
* ipa: Fix ipa_ccm_id_resp_parse on big endian systemsPau Espin Pedrol2019-03-281-2/+2
| | | | Change-Id: Iedc46ab53a4f76bbd98741c065fad3d9042a34a4
* ipa: Document ipa_ccm_idtag_parse_off and fix ipa_ccm_idtag_parsePau Espin Pedrol2019-03-281-1/+11
| | | | | | | | | | | | | | | | | | | | | ipa_ccm_idtag_parse_off is broken, and can only be used with len_offset=1 on ID Request messages, otherwise won't work correctly. Modify ipa_ccm_idtag_parse to at least parse those correctly, and document the limitations. Those two functions are already deprecated and only used in openbsc by 3 callers: * ipa_ccm_idtag_parse in ussd_read_cb(): Broken, that function can only work for Requests and it's used to parse a Response. * ipa_ccm_idtag_parse_off in forward_sccp_to_msc (NAT): Broken, it can only be used to parse Requests and it's used to parse a Response. Furthermore, len_offset=2 is passed which makes no sense and most probably it fails always, or can even make the program crash. * ipa_ccm_idtag_parse_off in (answer_challenge): This one is fine and could actually be replaced with ipa_ccm_id_get_parse after this commit is merged. Change-Id: I6efc852dfc041192f554e41a58290a0f63298021
* src/gsmtap_util.c: fix possible memleak in gsmtap_source_init()Vadim Yanitskiy2019-03-281-0/+1
| | | | | | | In gsmtap_source_init() we dynamically allocate a gsmtap_inst struct, but don't free it if the subsequent call to osmo_fd_register() fails. Change-Id: I970b493f3a64fbe9c3f68fcfba5097ee3ff72960
* BSSGP: use variable for NSEIMax2019-03-281-26/+27
| | | | | | | | Handle NSEI the same way as BVCI is handled: assign it to variable instead of repetitive calls to msgb_nsei() - this simplifies log update in follow-up patches and makes code slightly easier to read. Change-Id: I919a717ca22646849d6ec7f62c677c536db0ed31
* logging_gsmtap.c: document all params of log_target_create_gsmtap()Vadim Yanitskiy2019-03-271-0/+4
| | | | Change-Id: Id7bd6b4fb4be571af351f77aa4a59b9e1076434f
* Doxygen: fix documentation of osmo_timer_setup()Vadim Yanitskiy2019-03-271-2/+2
| | | | | | | | | | | | | | | | | | | | | This change fixes the following Doxygen warnings: timer.c:69: warning: argument 'callback' of command @param is not found in the argument list of osmo_timer_setup(struct osmo_timer_list *timer, void(*cb)(void *data), void *data) timer.c:69: warning: argument 'pointer' of command @param is not found in the argument list of osmo_timer_setup(struct osmo_timer_list *timer, void(*cb)(void *data), void *data) core/timer.h:70: warning: The following parameters of osmo_timer_setup(struct osmo_timer_list *timer, void(*cb)(void *data), void *data) are not documented: parameter 'cb' parameter 'data' Change-Id: If5668f40a7bfde2f4f22329a071c8c6eff23b99e
* src/rate_ctr.c: drop some incorrect \ref referencesVadim Yanitskiy2019-03-271-3/+3
| | | | | | | | | rate_ctr.c:411: warning: unable to resolve reference to `handle_group' for \ref command rate_ctr.c:208: warning: unable to resolve reference to `talloc' for \ref command Change-Id: I24a80ff6cf11ce0455529515d1ecb9900f0271a8
* Doxygen: fix documentation of rate_ctr_for_each_counter()Vadim Yanitskiy2019-03-271-1/+1
| | | | | | | | | | Doxygen was confused by duplicated documentation for both definition and declaration of rate_ctr_for_each_counter(). Moreover, both variants contained some mistakes. Let's avoid this duplication and keep the only (corrected) one. Change-Id: Icca2d4a95bd5f96ae85a86909ec90fb8677cacf3
* src/msgb.c: fix Doxygen documentation for msgb_printf()Vadim Yanitskiy2019-03-271-2/+3
| | | | | | | | | | | | | | | | | This change fixes the following Doxygen warnings: src/msgb.c:479: warning: argument 'msg' of command @param is not found in the argument list of msgb_printf(struct msgb *msgb, const char *format,...) core/msgb.h:708: warning: The following parameters of msgb_printf(struct msgb *msgb, const char *format,...) are not documented: parameter 'msgb' parameter 'format' As a bonus, it dot-terminates all sentences. Change-Id: Ib708664336eef06f748d408ae02a13c754b6647a
* src/logging.c: fix syntax errors in Doxygen documentationVadim Yanitskiy2019-03-271-7/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change should fix the following warnings: logging.c:956: warning: unable to resolve reference to `talloc' for \ref command logging.c:203: warning: argument 'in' of command @param is not found in the argument list of log_level_str(unsigned int lvl) logging.c:194: warning: argument 'in' of command @param is not found in the argument list of log_parse_level(const char *lvl) logging.c:708: warning: argument 'print_catname' of command @param is not found in the argument list of log_set_print_category(struct log_target *target, int print_category) logging.c:687: warning: argument 'print_filename' of command @param is not found in the argument list of log_set_print_filename2(struct log_target *target, enum log_filename_type lft) logging.c:729: warning: argument 'print_catname' of command @param is not found in the argument list of log_set_print_level(struct log_target *target, int print_level) logging.c:893: warning: argument 'in' of command @param is not found in the argument list of log_target_destroy(struct log_target *target) Change-Id: I85f6c70216b7574b49b90bb1469869a47f721713
* Revert "ipa_ccm_idtag_parse*: Fix reported length value"Oliver Smith2019-03-251-1/+1
| | | | | | | | | | | | This reverts commit 1261db15058cfa94615f26c1083bb8a38d09218b. The patch broke openbsc's external tests, and currently it is unclear whether it is just an error in the test or if openbsc makes wrong assumptions about the length value. Let's revert the patch to unblock the master-openbsc jenkins job. Related: OS#3851 Change-Id: I9adea35ff6de36c1611c7f85dde1b15bc1c0e786
* Doxygen: fix incorrect / missing parameter descriptionVadim Yanitskiy2019-03-252-4/+4
| | | | Change-Id: Ibc63a5d4442a192efab8b5b30e0beb3545642ecc
* Revert "signal.c: Make non-exported tall_sigh_ctx static"Oliver Smith2019-03-221-1/+1
| | | | | | | | | | | | | This reverts commit cff2242e686be9ac19ba5757a710bc769a9201ec. The patch broke openbsc: ../../src/libcommon/libcommon.a(talloc_ctx.o): In function `talloc_ctx_init': /build/openbsc/src/libcommon/talloc_ctx.c:50: undefined reference to `tall_sigh_ctx' See also: https://lists.osmocom.org/pipermail/openbsc/2019-March/012843.html Change-Id: Ib4cb31427a1cad063bc9f1a10b9c3182b314a9f2
* signal.c: Make non-exported tall_sigh_ctx staticHarald Welte2019-03-211-1/+1
| | | | | | | | | As indicated in the commitlog of Id58ca18eb826b8f4183a7cf0dbb2b38cba702a09, the symbol was never exported in a header file, so it should be safe to mark it as static. Change-Id: I7132ffe9a7efcab226cc639d1b2357f7115bcadf
* signal.c: Fix osmo_signal_talloc_ctx_init()Harald Welte2019-03-211-1/+1
| | | | | | | | | | | | | This function is broken ever since it was added back in 2018 in commit Id58ca18eb826b8f4183a7cf0dbb2b38cba702a09 Rather than allocating from the user-supplied 'root_ctx', it is allocating from the context that it's trying to create (which is NULL at that time, rendering the entire operation more or less a no-op. For sure you will not see osmo_signal structures never in any talloc report. Change-Id: I922d26815a3baa5be74bd3ee89d498555882d62f
* select: Rename BSC_FD_* constants to OSMO_FD_*Harald Welte2019-03-218-32/+32
| | | | | | | | | | | | 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
* src/signal.c: cosmetic: use talloc_zero()Vadim Yanitskiy2019-03-201-3/+1
| | | | Change-Id: I55c6249b0c4c82d5a181001e945ff2eca6e9ca36
* gprs_ns_sns: Properly initialize sockaddr_in in gprs_nsvc_create_ip4()Harald Welte2019-03-201-0/+2
| | | | | | | | When putting together a sockaddr_in, we must not only set the IP address and port, but also set the address family to AF_INET. And while at it, let's zero-initialize the entire 'struct sockdadr_in'. Change-Id: I1c8d8fe7f79a2ec737baa7800247269c3271983e
* socket: osmo_sock_get_name() Use "const void *" as talloc contextHarald Welte2019-03-191-1/+1
| | | | Change-Id: Ie6877277cddb0a9e049449c260afe3314ba65050
* vty/tdef_vty.c: drop redundant comparisonVadim Yanitskiy2019-03-191-1/+1
| | | | | | | | | | | | | | | The amount of arguments is already being checked a few lines before: /* If any arguments are missing, redirect to 'show' */ if (argc < 3) return show_timer(self, vty, argc, argv); so we cannot reach the expression NULL inside this statement: group_arg = argc > 0 ? argv[0] : NULL; Change-Id: Ice59d1a46c2080cd02060e3410706c502db4ce0b Fixes: CID#190873 Logically dead code (DEADCODE)
* ipa_ccm_idtag_parse*: Fix reported length valueHarald Welte2019-03-191-1/+1
| | | | | | | | | | | | | | | IPA CCM is using a somewhat weird TLV encoding scheme: * 16bit length (of tag and value) * 8bit tag * value Our existing code mapping the CCM to 'struct tlv_parse' used the plain length value without accounting for the one-byte tag. This patch ensures we only report the length of the "value" part, excluding the tag. Change-Id: I435aaa33605bd48635715a2c81aa2d231c1abf51
* rate_ctr_group_free(): guard against empty or NULL inputMax2019-03-191-1/+5
| | | | Change-Id: I859a91ee4400b3685c05971f8c66bceca6758724
* gprs_ns_sns: Use "correct" remote IP address for local IP endpointHarald Welte2019-03-161-2/+2
| | | | | | | | | | | we cannot use "nsi->nsip.remote_ip", as this address is not set when SNS is in use. We can only have a valid nsi->nsip.remote_ip if there's only a single NS-VC inside the NS Instance, as this would connect() the UDP socket to the remote IP/port, breaking any possibility to have multiple NS-VCs to different SGNS-side IP addresses. Closes: OS#3845 Change-Id: Ic094621eb01d7458063f531289d5eeadf52bf330
* 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
* osmo_gsm48_classmark_a5_name(): fix 'no-cm3' labelNeels Hofmeyr2019-03-141-1/+1
| | | | Change-Id: Id84021858dfb2f7d6a7cf81ae73bd94cd47f6776
* Fix build on non-glibc systemsKarl Koscher2019-03-111-3/+8
| | | | Change-Id: Id5d577522a4889e152158f7e93ee1c99d3a21003
* gsm0808_utils: fix gsm48 multirate to S-bit converterPhilipp Maier2019-03-111-0/+10
| | | | | | | | | | | | The function gsm0808_sc_cfg_from_gsm48_mr_cfg() is used to convert a gsm48 multirate struct into a set of S-bits (S0 to S15). However, the conversion function currently does not take into account that bit S1 actually stands for four rates at once (Config-NB-Code = 1). Lets make sure that S1 is only set when the multirate configuration permits all four required rates. Change-Id: I6ad531d4e70c2252e32e2bbaca8e14a7ec6d9840 Related: SYS#4470
* gsm0808_utils: fix gsm48 multirate configuration generatorPhilipp Maier2019-03-111-21/+73
| | | | | | | | | | | | | | | | | The function gsm0808_sc_cfg_from_gsm48_mr_cfg() takes an S15 to S0 bitmask and converts that bitmask into an AMR multirate configuration struct. Unfortunately the current implementation implements 3GPP TS 28.062, Table 7.11.3.1.3-2 wrongly in some aspects. Lets fix this. - Fix wrong interpretation of the bitpatterns - 5,15K is invalid and must never be selected - Make sure that no more than 4 rates are selected in the active set - Extend unit-test Change-Id: I6fd7f4073b84093742c322752f2fd878d1071e15 Related: SYS#4470
* add gsm0808_cell_id_from_cgi(), gsm0808_cell_id_to_cgi()Neels Hofmeyr2019-03-082-0/+89
| | | | | | | | | | | | | | | | CGI to Cell ID: for example, for Paging, osmo-msc has a CGI for a subscriber and needs to send out a Cell Identifier IE. Makes sense to add this conversion here. Cell ID to CGI: for a Layer 3 Complete, a subscriber sends the current cell in the form of a Cell Identifier, which we store as a CGI, if necessary enriched with the local PLMN. Add enum with bitmask values to identify parts of a CGI, for the return value of gsm0808_cell_id_to_cgi(). Can't use enum CELL_IDENT for that, because it doesn't have a value for just a PLMN (and is not a bitmask). Change-Id: Ib9af67b100c4583342a2103669732dab2e577b04
* fsm: add osmo_fsm_inst_state_chg_keep_or_start_timer()Neels Hofmeyr2019-03-072-13/+57
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | During FSM design for osmo-msc, I noticed that the current behavior that keep_timer=true doesn't guarantee a running timer can make FSM design a bit complex, especially when using osmo_tdef for timeout definitions. A desirable keep_timer=true behavior is one that keeps the previous timer running, but starts a timer if no timer is running yet. The simplest example is: a given state repeatedly transitions back to itself, but wants to set a timeout only on first entering, avoiding to restart the timeout on re-entering. Another example is a repeated transition between two or more states, where the first time we enter this group a timeout should start, but it should not restart from scratch on every transition. When using osmo_tdef timeout definitions for this, so far separate meaningless states have to be introduced that merely set a fixed timeout. To simplify, add osmo_fsm_inst_state_chg_keep_or_start_timer(), and use this in osmo_tdef_fsm_inst_state_chg() when both keep_timer == true *and* T != 0. In tdef_test.ok, the changes show that on first entering state L, the previous T=1 is now kept with a large remaining timeout. When entering state L from O, where no timer was running, this time L's T123 is started. Change-Id: Id647511a4b18e0c4de0e66fb1f35dc9adb9177db
* represent negative T-timers as Osmocom-specific X-timersNeels Hofmeyr2019-03-062-18/+37
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