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* tdef: Fix license: GPLv2+ instead of AGPLv3+Harald Welte2019-05-271-4/+5
| | | | | | | | | | | | libosmo{core,gsm,vty} code is GPLv2+. The tdef code originated in osmo-msc.git and was moved here without changing the license. That was a mistake, it always was meant to be under GPLv2-or-later after moving to libosmocore.git. Copyright is with sysmocom, so I as the managing director can approve the license change. Change-Id: Ie483ff6f6ea0a56c477649677b4b163c49df11d7
* Bump version: 1.0.1.143-cc72c → 1.1.0Pau Espin Pedrol2019-05-071-1/+1
| | | | Change-Id: I351411ca5913c8b40f23287ec7c9ebfe11bd2bb0
* add vty_is_active()Neels Hofmeyr2019-05-031-0/+10
| | | | | | | | | | | | | For async callbacks it is useful to determine whether a given VTY pointer is still valid. For example, in osmo-msc, a silent call can be triggered by VTY, which causes a Paging. The paging_cb then writes to the VTY console that the silent call has succeeded. Unless the telnet vty session has already ended, in which case osmo-msc crashes; e.g. from an osmo_interact_vty.py command invocation. With this function, osmo-msc can ask whether the vty pointer passed to the paging callback is still active, and skip vty_out() if not. Change-Id: I42cf2af47283dd42c101faae0fac293c3a68d599
* add osmo_str_startswith()Neels Hofmeyr2019-04-111-11/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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
* 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
* select: Rename BSC_FD_* constants to OSMO_FD_*Harald Welte2019-03-211-8/+8
| | | | | | | | | | | | 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
* 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)
* represent negative T-timers as Osmocom-specific X-timersNeels Hofmeyr2019-03-061-9/+22
| | | | | | | | | | | | | | | | | | | | fi->T values are int, i.e. can be negative. Do not log them as unsigned, but define a distinct timer class "Xnnnn" for negative T values: i.e. for T == -1, print "Timeout of X1" instead of "Timeout of T4294967295". The negative T timer number space is useful to distinguish freely invented timers from proper 3GPP defined T numbers. So far I was using numbers like T993210 or T9999 for invented T, but X1, X2 etc. is a better solution. This way we can make sure to not accidentally define an invented timer number that actually collides with a proper 3GPP specified timer number that the author was not aware of at the time of writing. Add OSMO_T_FMT and OSMO_T_FMT_ARGS() macros as standardized timer number print format. Use that in fsm.c, tdef_vty.c, and adjust vty tests accordingly. Mention the two timer classes in various API docs and VTY online-docs. Change-Id: I3a59457623da9309fbbda235fe18fadd1636bff6
* add osmo_tdef API, originally adopted from osmo-bsc T_defNeels Hofmeyr2019-02-042-1/+374
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move T_def from osmo-bsc to libosmocore as osmo_tdef. Adjust naming to be more consistent. Upgrade to first class API: - add timer grouping - add generic vty support - add mising API doc - add C test - add VTY transcript tests, also as examples for using the API From osmo_fsm_inst_state_chg() API doc, cross reference to osmo_tdef API. The root reason for moving to libosmocore is that I want to use the mgw_endpoint_fsm in osmo-msc for inter-MSC handover, and hence want to move the FSM to libosmo-mgcp-client. This FSM uses the T_def from osmo-bsc. Though the mgw_endpoint_fsm's use of T_def is minimal, I intend to use the osmo_tdef API in osmo-msc (and probably elsewhere) as well. libosmocore is the most sensible place for this. osmo_tdef provides: - a list of Tnnnn (GSM) timers with description, unit and default value. - vty UI to allow users to configure non-default timeouts. - API to tie T timers to osmo_fsm states and set them on state transitions. - a few standard units (minute, second, millisecond) as well as a custom unit (which relies on the timer's human readable description to indicate the meaning of the value). - conversion for standard units: for example, some GSM timers are defined in minutes, while our FSM definitions need timeouts in seconds. Conversion is for convenience only and can be easily avoided via the custom unit. By keeping separate osmo_tdef arrays, several groups of timers can be kept separately. The VTY tests in tests/tdef/ showcase different schemes: - tests/vty/tdef_vty_test_config_root.c: Keep several timer definitions in separately named groups: showcase the osmo_tdef_vty_groups*() API. Each timer group exists exactly once. - tests/vty/tdef_vty_test_config_subnode.c: Keep a single list of timers without separate grouping. Put this list on a specific subnode below the CONFIG_NODE. There could be several separate subnodes with timers like this, i.e. continuing from this example, sets timers could be separated by placing timers in specific config subnodes instead of using the global group name. - tests/vty/tdef_vty_test_dynamic.c: Dynamically allocate timer definitions per each new created object. Thus there can be an arbitrary number of independent timer definitions, one per allocated object. T_def was introduced during the recent osmo-bsc refactoring for inter-BSC handover, and has proven useful: - without osmo_tdef, each invocation of osmo_fsm_inst_state_chg() needs to be programmed with the right timeout value, for all code paths that invoke this state change. It is a likely source of errors to get one of them wrong. By defining a T timer exactly for an FSM state, the caller can merely invoke the state change and trust on the original state definition to apply the correct timeout. - it is helpful to have a standardized config file UI to provide user configurable timeouts, instead of inventing new VTY commands for each separate application of T timer numbers. Change-Id: Ibd6b1ed7f1bd6e1f2e0fde53352055a4468f23e5
* vty api: add vty_out_va()Neels Hofmeyr2019-02-041-12/+19
| | | | | | | | | Provide a va_list type vty_out() variant, to be able to pass on variable arguments from other function signatures to vty_out(). This will be used by Ibd6b1ed7f1bd6e1f2e0fde53352055a4468f23e5 for osmo_tdef. Change-Id: Ie6e6f11a6b794f3cb686350c1ed678e4d5bbbb75
* vty telnet: consistently never change nodes upon CTRL-CNeels Hofmeyr2019-02-041-18/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove any special node exiting from the VTY CTRL-C handling. From a curious VTY transcript test glitch, I noticed weird behavior by the VTY telnet shell: usually, when the user hits CTRL-C, that means to cancel the current command line and present a fresh, clean prompt. However, only on the CONFIG_NODE and CFG_LOG_NODE, a CTRL-C also exits the current node and moves up by one level. This behavior is unexplainable and makes zero sense. No other nodes exit on CTRL-C: - on the ENABLE node, a CTRL-C stays on the ENABLE_NODE and doesn't exit to the VIEW_NODE. - any sub-nodes of the CONFIG_NODE stay unchanged, e.g. 'network' or 'bts' / 'trx', etc. There is no apparent special meaning of CTRL-C on CONFIG_NODE nor CFG_LOG_NODE to justify this odd choice. Particularly, the vty transcript tests using osmo_verify_transcript_vty.py rely on sending CTRL-C to clear the command prompt, so that we can properly test sending '?' to the VTY during transcripts. In a live session, a '?' prints available options and then updates the prompt with identical command arguments. In a transcript test, that doesn't make sense, because each time the transcript writes out a new command to run. Consider e.g. a transcript test like: tdef_vty_test(config)# timer ? tea Tea time test Test timers software Typical software development cycle tdef_vty_test(config)# timer tea ? [TNNNN] T-number, optionally preceded by 't' or 'T'. To be able to issue a fresh command after '?', osmo_verify_transcript_vty.py explicitly sends a CTRL-C to clear the command buffer. Hence there we rely on predictable behavior of CTRL-C. More particularly, the upcoming osmo_tdef_vty transcript tests are apparently the first that want to test '?' behavior on the CONFIG_NODE's root level and fall on their face, because of the implicit exit that happens only there. Change-Id: I4f339ba61f1c273fa7da85caf77ba116ae2697b1
* vty: enable tab-completion for optional-multi-choice argsNeels Hofmeyr2019-02-041-1/+10
| | | | | | | | | | | | | | In cmd_complete_command_real(), detect and strip square braces from multi-choice arguments, to enable tab-completion for commands like > list cmd [(alpha|beta)] > cmd <TAB> alpha beta > cmd be<TAB> > cmd beta Change-Id: I8c304300b3633bb6e9b3457fcfa42121c8272ac0
* vty: enable optional-multi-choice syntax: [(one|two)]Neels Hofmeyr2019-02-041-3/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | Since very recently we sensibly handle commands like cmd ([one]|[two]|[three]) as optional multi-choice arguments. In addition, support the more obvious syntax of cmd [(one|two|three)] Internally, the tokens are mangled to [one] [two] and [three], which is how the rest of the code detects optional args, and makes sense in terms of UI: > cmd ? [one] [two] [three] (i.e. optional arguments are always shown in braces in '?' listings) Before this patch, commands defined with a syntax like [(one|two)], would lead to an assertion (shows as "multiple") during program startup. Change-Id: I952b3c00f97e2447f2308b0ec6f5f1714692b5b2
* vty: enable optional-multi-choice syntax: ([one]|[two])Neels Hofmeyr2019-02-041-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add basic optional multi-choice argument support. The VTY detects optional arguments by square braces. > cmd ? [optional-arg] > cmd optional-arg ok > cmd ok However, within multi-choice args, these braces were so far not treated as optional: > list cmd2 ([one]|[two]|[three]) > cmd2 % Command incomplete In preparation for I952b3c00f97e2447f2308b0ec6f5f1714692b5b2 which will enable the more obvious syntax of cmd [(one|two)] for reasons of internal implementation, first support a syntax of cmd ([one]|[two]) The internal vty implementation always needs square braces around each option. There is currently no good way to prevent developers from defining braces inside multi-arguments, so it is easiest to allow and handle them: > list cmd2 ([one]|[two]|[three]) > cmd2 ok The VTY doesn't guard against a mix like cmd (one|[two]) With this patch, a multi-choice command is treated as optional iff the first element is in square brackets. The remaining elements' square brackets have no effect besides confusing the user. This is not explicitly checked against. In general, I would prefer to check all of these details, but the current VTY code with its endless code duplication and obscure string mangling just doesn't provide that luxury. There are numerous worse errors hidden in there. Change-Id: I9a8474bd89ddc2155c58bfca7bd038d586aaa60a
* Bump version: 0.12.0.128-8dfde → 1.0.0Harald Welte2019-01-191-1/+1
| | | | Change-Id: I1bd973754b1ebc42283f6a07defa60f58523f5a3
* Fix VTY documentation error introduced in "bind" VTY port changeHarald Welte2018-12-231-1/+2
| | | | | | | | | In 99ae401e490e60fc07bef7eacc478be7bdcc9f5a we introduced the ability to specify the TCP port to which the VTY should bind. However, the VTY dcumentation wasn't extended accordingly, causing virtually all master build jobs to fail. Change-Id: I54fb0ca0d3a884a64a349b22de70f3d9bd1a6d54
* vty: Make TCP port configurable and introduce telnet_init_defaultHolger Hans Peter Freyther2018-12-232-3/+31
| | | | | | | | | | | | | | | Extend the vty_bind_cmd VTY command to allow to optionally specify a port in addition to the IPv4 address. Introduce telnet_init_default to relieve client code from having to query the bind IPv4 address (and now the TCP port). Instead a client only needs to pass the default TCP port to use. Client code should use it like: int rc = telnet_init_default(ctx, priv, OSMO_VTY_PORT_SGSN); Change-Id: Id5fb2faaf4311bd7284ee870526a6f87b7e260f3
* vty: The telnet interface is TCP only. Fix the commentsHolger Hans Peter Freyther2018-12-221-2/+2
| | | | Change-Id: I38555c4d4f565ce21dda34fc3857c47b3d802dbd
* make 'show rate-counters' show group indexStefan Sperling2018-10-291-1/+1
| | | | | | | | | | | | | | Show each rate counter group's index in the output of the 'show rate-counters' command, to provide some way of telling apart distinct instances of the same rate counter group. This is not a very user-friendly UI because these indices are generated internally by libosmocore and/or applications, so users cannot easily assign meaning to these indices. However, the current rate counter implementation doesn't allow for more. Change-Id: Ieb151239407e4b2f8859fefec8d0670f5ddf908a Related: OS#3674
* stop printing group description in vty_out_rate_ctr_group_fmt()Stefan Sperling2018-10-292-3/+1
| | | | | | | | | | | | | | When vty_out_rate_ctr_group_fmt() prints the description of a counter group, it assumes this description should appear at the beginning of a line. However, the caller might be printing counters in an indented context. So just let the caller worry about printing the group title if necessary (there is currently only one known caller, which is updated in this commit). Note that printing of the group title was an undocumented feature. Change-Id: I2c55cb54e8b7a7c8c6cf72f22287083767ed0201 Related: OS#2660
* vty: adjust telnet logMax2018-10-241-1/+1
| | | | | | | Adjust wording so telnet command can be directly copy-pasted from the log to access the interface without the need for further editing. Change-Id: I1876447f9285adcd1b09937a6121afabd0b32e52
* vty.c: Set vty->fd to -1 after closing the FDHarald Welte2018-10-211-1/+3
| | | | Change-Id: I07d105f4a810dd809fbf6feb5c04e7410020c887
* telnet_interface: avoid double-close of fd()Harald Welte2018-10-211-1/+1
| | | | | Change-Id: Ibd81f29fa22d53553bd73c055d6a1f5255a69bad Fixes: Coverity CID#135238
* vty logging: fix crash when missing 'logging enable'Neels Hofmeyr2018-10-011-0/+8
| | | | | | | | | | | | | | | We must explicitly check the return value of osmo_log_vty2tgt(), or may run into a segfault. I wasn't aware of this and introduced numerous such cases in I36f17c131cc70ce5a1aef62fd9693097de230cd4. Reproduce: on the VTY, do not issue 'logging enable', invoke 'logging level force-all LEVEL' first. Show in logging_vty_test.vty that this situation is now again amended by telling the user that logging was not enabled. Related: OS#3611 Change-Id: Id11702d1801d6654ca5e5a51b597a0d802e2e8dd
* logging_vty: Ensure writing well-formed config filesHarald Welte2018-09-251-9/+9
| | | | | | | We want to have well-formed config files that print exactly one space per VTY/config node level, and not two. Change-Id: Ia75c7067284ea225cffe13ca71bad05a7747ae66
* vty: omit HIDDEN from vty referenceNeels Hofmeyr2018-09-241-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | During 'show online help', the XML vty node dump, omit all commands marked HIDDEN. These commands were already hidden from the VTY reference prior to commit I1f18e0e41da4772d092d71261b9e489dc1598923, because of broken/confusing bit and boolean logic mixup. After that commit, HIDDEN commands end up in the doc. So practically, this patch here brings back the status quo of before above commit, even though the previous code clearly "intended" to list HIDDEN commands in the reference but failed to have that effect. AFAICT the complete list of commands currently hidden is: * osmo-bsc: bts/"training_sequence_code <0-7>", * osmo-bsc: ts/"phys_chan_config PCHAN" for uppercase pchans; * osmo-bts: bts/"rtp bind-ip A.B.C.D" which actually says vty_out(vty, "%% rtp bind-ip is now deprecated%s", VTY_NEWLINE); * osmo-sgsn: 'reset sgsn state' used for SGSN testing. Note that the osmo-sgsn build was broken by including hidden commands in the vty reference, since one of its hidden commands had missing doc strings and made osmotestconfig.py signal failure. This would fix that from the hide-hidden-commands angle, and so would osmo-sgsn commit I8b6e8615e409266910f2f76a10ced9ab33e4de91 from the fix-the-doc-strings angle. Change-Id: I92c3c66ff69c186234276c64478d6342e061d25e
* vty list: fix deprecation/hidden bit logicNeels Hofmeyr2018-09-241-2/+1
| | | | | | | | | | If a command is both hidden and deprecated, still don't show it for the 'list' command. We currently have no such nodes, as it seems, though. Related: OS#3584 Change-Id: I07ec15cab057a3e09064e0420a69121ee8eb4253
* vty reference: fix deprecation bit evaluationNeels Hofmeyr2018-09-241-2/+2
| | | | | | | | | | | In vty_dump_nodes(), make sure the bitwise & is evaluated first. For the deprecation flag (0x1), the practical effect is most likely identical, assuming that the boolean ! operator flips the first bit, so I expect no visible functional difference. It still was confusing and wrong to look at. Related: OS#3584 Change-Id: I1f18e0e41da4772d092d71261b9e489dc1598923
* logging vty: add 'logging level set-all <level>'Neels Hofmeyr2018-09-161-0/+24
| | | | | | | | | Add new command to once-off set each and every category to the given log level, as discussed at length on the openbsc@ mailing list. Show that it works in logging_vty_test.vty. Change-Id: I4c3e4f786476cb813fdc0a7c64f30ee04758309d
* logging vty: deprecate 'all', introduce 'force-all'Neels Hofmeyr2018-09-131-20/+57
| | | | | | | | | | | | | | | Add 'logging level force-all <level>' and 'no logging level force-all' as new names for 'logging level all <level>' and 'logging level all everything'. Resurrect the functionality of 'logging level all everything' -- even if it is still deprecated because the name is confusing, it is now just an alias for 'no logging level force-all'. Show in logging_vty_test.vty that we can now again lift the global logging clamp, both with the new commands as well as with the deprecated ones. Also show that 'force-all' is written back properly, if set. Change-Id: I36f17c131cc70ce5a1aef62fd9693097de230cd4
* logging vty: write: check logging levels validityNeels Hofmeyr2018-09-131-7/+23
| | | | Change-Id: If683b1272ad2d5b402b91c52c496aa7975bc6315
* logging vty: deprecate the 'everything' keywordNeels Hofmeyr2018-09-131-12/+22
| | | | | | | | | | | | | | | | The 'logging level all everything' has not had an effect for some time now. The plan is to bring back its old functionality, but to keep it deprecated and rather define a less confusing name. * Deprecate 'everything'. * Do not write 'everything' during 'write file' or 'show running-config', which we curiously still do until now. BTW, the reason why we need to compose a complete list of categories for the deprecated 'everything' command is explained in detail in the commit log for I3b083f27e3d751ccec258880ae7676e9af959a63 Change-Id: Ib75fedb0572570a61bb34ee729a2af86cf5f16da
* logging vty: rewrite 'logging level' vty cmd generationNeels Hofmeyr2018-09-131-6/+61
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Completely drop the implementations of log_vty_command_{str,description}(). These functions have been public API once, marked as deprecated since c65c5b4ea075ef6cef11fff9442ae0b15c1d6af7 (March 2017). I considered to keep them, or reduce them to useless stubs, but it is quite silly, really. These functions are completely and utterly useless outside of libosmocore. Any program linking these deserves to fail. Re-implement vty logging level command gen, in logging_vty.c. logging.c is simply the wrong place for that. Introduce logging_internal.h to share logging definitions to logging_vty.c without publishing as API. Introduce static gen_logging_level_cmd_strs() to compose a list of category arguments with their descriptions for VTY commands. Use osmo_talloc_asprintf() instead of the previous error prone and chaotic strlen() counting method. Do not dynamically generate log level arguments, just keep static strings. We are super unlikely to ever change the log levels we have. No changes in logging_vty_test.vty: proves that there is no functional change. All of this, besides introducing basic sanity, is cosmetic preparation to be able to re-use the generic command generation code for arbitrary commands with category or level args (for deprecated and new keywords). Rationale: I want to hide 'all' and 'everything' from the VTY command documentation, by means of deprecating. I first tried to simply define a deprecated 'logging level CAT everything' command: logging level (all|rsl|rr|...) (debug|info|notice|error|fatal) logging level CAT everything # <- deprecated and hidden But unfortunately, command matching doesn't work as intended when the CAT argument reflects a valid category; I want it to invoke the deprecated function as soon as the 'everything' keyword follows, but it stays stuck to the "valid" command when the category argument matches an explicit keyword in that list, and will throw an error on the following 'everything' keyword. I.e.: logging level rsl everything % Unknown command # <-- leads to config file parse error logging level unknown_string everything % Ignoring deprecated 'everything' # <-- works only for invalid categories So I need to define 'everything' separately, again with a list of each valid category instead of a generic CAT arg. Change-Id: I3b083f27e3d751ccec258880ae7676e9af959a63
* add osmo_str_tolower() and _toupper() with testNeels Hofmeyr2018-09-071-7/+4
| | | | | | | | | | | | | | | | | | | | | | | | | We already have osmo_str2lower() and osmo_str2upper(), but these lack: * proper destination buffer bounds checking, * ability to call directly as printf() argument. Deprecate osmo_str2upper() and osmo_str2lower() because of missing bounds checking. Introduce osmo_str_tolower_buf(), osmo_str_toupper_buf() to provide bounds-safe conversion, also able to safely convert a buffer in-place. Introduce osmo_str_tolower(), osmo_str_toupper() that call the above _buf() equivalents using a static buffer[128] and returning the resulting string directly, convenient for direct printing. Possibly truncated but always safe. Add unit tests to utils_test.c. Replace all libosmocore uses of now deprecated osmo_str2lower(). Naming: the ctype.h API is called tolower() and toupper(), so just prepend 'osmo_str_' and don't separate 'to_lower'. Change-Id: Ib0ee1206b9f31d7ba25c31f8008119ac55440797
* log: add 'last' option to 'logging print file'Neels Hofmeyr2018-08-271-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Allow printing the source file information *after* the log information. Add target->print_filename_pos, log_set_print_filename_pos() and enum log_filename_pos, and the optional 'last' keyword to the 'logging print file' vty command. (An enum in case we want to add other positions later.) Rationale: on log lines, the logging context is usually printed first in the logging text. Without the source file information, this logging context pretty much aligns in an easily readable way. When adding the source file information, each line's logging context info is shifted right by a pretty much random amount and it is hard to spot recurring logging contexts. One solution is to switch off source file info, of course, but that's not an option when actively hacking on bugs and new features. For example, it is unnecessarily hard to spot lchan FSM related log lines in this osmo-bsc log snippet: DRSL NOTICE mgw_endpoint_fsm.c:603 mgw-endpoint(conn0){WAIT_MGW_RESPONSE}: Freeing instance DRSL NOTICE fsm.c:381 mgw-endpoint(conn0){WAIT_MGW_RESPONSE}: Deallocated DMSC NOTICE mgw_endpoint_fsm.c:603 SUBSCR_CONN(conn0){CLEARING}: Received Event FORGET_MGW_ENDPOINT DCHAN DEBUG lchan_rtp_fsm.c:741 lchan(0-0-1-TCH_F-0){WAIT_RLL_RTP_ESTABLISH}: Received Event LCHAN_EV_RTP_RELEASED DCHAN DEBUG lchan_rtp_fsm.c:520 lchan_rtp(0-0-1-TCH_F-0){ROLLBACK}: Freeing instance DCHAN DEBUG fsm.c:381 lchan_rtp(0-0-1-TCH_F-0){ROLLBACK}: Deallocated DCHAN DEBUG lchan_rtp_fsm.c:520 lchan(0-0-1-TCH_F-0){WAIT_RL