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* add osmo_bssap_tlv_parse2() for multiple identical TNeels Hofmeyr2019-05-031-0/+3
| | | | | | | | | | | | | | | | In BSSMAP messages, at least the Cell Identifier IE can appear more than once. We have tlv_parse2() which allows decoding into an array of tlv_parsed to cleanly handle multiple occurences. Hence add osmo_bssap_tlv_parse2() which supports multiple occurences. An alternative would be to directly call tlv_parse2() with gsm0808_att_tlvdef() when multiple T occurences are needed, and I'm not really sure why osmo_bssap_tlv_parse() exists in the first place. But because it does, add a similar definition that is capable of handling multiple IEs with identical Tag discriminator. Change-Id: Ib9a2095f7498dc2cda2a57154b2dbe4621df72f8
* add gsm48_decode_bcd_number2() from osmo-mscNeels Hofmeyr2019-05-031-1/+5
| | | | | | | | | | | | gsm48_decode_bcd_number() is unable to provide proper bounds validation of input and output data, hence osmo-msc's vlr.c introduced a static decode_bcd_number_safe() a long time ago. Move to libosmocore. I need to use the same function to decode an MSISDN during inter-MSC Handover, instead of making it public in osmo-msc, rather deprecate the unsafe function and provide a safer version for all callers. Mark the old one deprecated. Change-Id: Idb6ae6e2f3bea11ad420dae14d021ac36d99e921
* BSSMAP: add messages for inter-BSC and inter-MSC HandoverNeels Hofmeyr2019-05-031-0/+66
| | | | Change-Id: I9dac375331f6bea744769e973725d58e35f87226
* gsm/gsm_utils.h: fix argument type of gsm_chan_t_name()Vadim Yanitskiy2019-05-021-1/+1
| | | | | | | | The actual value-string array 'gsm_chan_t_names' describes the enum values of 'gsm_chan_t', not 'gsm48_chan_mode'. Change-Id: Ifc2121b23fb8d07589cc5b7aa8fbf4e27eb6b72b Fixes: CID#188831, CID#188825
* BSSMAP: tweaksNeels Hofmeyr2019-04-261-2/+2
| | | | | | | | | | | | | Change two instances of Speech Version values to enum gsm0808_permitted_speech. It is often not trivial to find the right values for a uint8_t member, giving the enum name makes it a lot easier/safer to use. In gsm0808_create_handover_required(), use msgb_tv_put() so that the enum's storage size doesn't matter. (Already used for handover_performed) Fix typo in doc of gsm0808_create_handover_required(). Change-Id: I6387836bab76e1fa42daa0f42ab94fc14b70b112
* GSUP: add inter-MSC handover related msgs and IEsOliver Smith2019-04-261-0/+66
| | | | | | | | | | | | | | | | | | | | Based on a draft created by Neels, which is the result of reading a MAP trace of two MSCs negotiating inter-MSC handovers, and of reading the TS 29.002, TS 29.010 and related specs: https://lists.osmocom.org/pipermail/openbsc/2019-January/012653.html I figured out that the "Handover Number" mentioned in the specifications is the same as the MSISDN IE that we already have, so we can use that instead of creating a new IE (example usage in tests/gsup/gsup_test.c). Create a new OSMO_GSUP_MSGT_E_ROUTING_ERROR message type, which the GSUP server uses to tell a client that its message could not be forwarded to the destination (see [1]). MAP has no related message. [1]: Change-Id: Ia4f345abc877baaf0a8f73b8988e6514d9589bf5 (osmo-hlr.git) Related: OS#3774 Change-Id: Ic00b0601eacff6d72927cea51767801142ee75db
* GSUP: add Message Class IENeels Hofmeyr2019-04-131-0/+21
| | | | | | | | | | | | | | | | | | osmo-msc and osmo-hlr have distinct subsystems handling incoming GSUP messages. So far we decide entirely by message type which code path should handle a GSUP message. Thus no GSUP message type may be re-used across subsystems. If we add a GSUP message to indicate a routing error, it would have to be a distinct message type for subscriber management, another one for SMS, another one for USSD... To allow introducing common message types, introduce a GSUP Message Class IE. In the presence of this IE, GSUP handlers can trivially direct a received message to the right code path. If it is missing, handlers can fall back to the previous switch(message_type) method. Change-Id: Ic397a9f2c4a7224e47cab944c72e75ca5592efef
* add OSMO_IMSI_BUF_SIZENeels Hofmeyr2019-04-132-1/+4
| | | | | | | | | | | | Various places in our code base figure out how many chars they need to safely store an IMSI. An IMSI can have a checksum digit, which is not reflected by GSM23003_IMSI_MAX_DIGITS. And we usually need a terminating \0. Instead of having a magic +2 repeated every so often, rather define OSMO_IMSI_BUF_SIZE to contain both checksum digit and nul char, and have the explanatory comment with it here in libosmocore. Change-Id: Id11ada4c96b79f7f0ad58185ab7dbf24622fb770
* Add _c versions of functions that otherwise return static buffersHarald Welte2019-04-108-0/+20
| | | | | | | | | | | | | | 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
* gsm_03_40.h: define max SM-TP-UDL (User-Data-Length) valuesVadim Yanitskiy2019-04-091-0/+5
| | | | | | | As per 3GPP TS 03.40, section 9.2.3.16 "TP-User-Data-Length (TP-UDL)" field may contain up to 140 octets (or 140 * 8 / 7 = 160 septets). Change-Id: I54f88d2908ac47228813fb8c049f4264e5145241
* Add _buf() functions to bypass static string buffersHarald Welte2019-04-038-0/+19
| | | | | | | | | | | | | | | 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
* gsm_utils.h: remove unused include of gsm_08_08.hNeels Hofmeyr2019-03-271-1/+0
| | | | Change-Id: Ied4cb2bd06147785540a53ef118e9268406da702
* gsm0808_utils: fix gsm48 multirate configuration generatorPhilipp Maier2019-03-112-1/+15
| | | | | | | | | | | | | | | | | 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/+12
| | | | | | | | | | | | | | | | 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
* enlarge gsm0808 msgb headroomNeels Hofmeyr2019-02-261-2/+2
| | | | | | | | | | | | | | | | It should be large enough to prepend a struct osmo_scu_prim to pass down an SCCP stack (see libosmo-sccp). 264 should suffice, but pick the next larger power-of-two instead. In osmo-msc, I would like to prepend an osmo_prim to the msgb created by gsm0808 API, but turns out the headroom is too small: msgb(0x61700001b660): Not enough headroom msgb_push (126 < 264) Instead of always copying a msgb that has just that instant been created, it makes more sense to allocate sufficient headroom in the first place. Change-Id: I95729991eb49555f8bba60c5dc916131b03b6cf2
* LCLS: add string dump helpersMax2019-02-261-0/+3
| | | | | | | | | Add functions to dump LCLS (without GCR) and GCR. Dumping entire struct results in inconveniently long string hence the separate functions. Both use talloc functions so they expect caller to take care of providing proper allocation context and freeing memory. Change-Id: Ic3609224c8f3282d667e75f68bc20327e36eb9e6
* gsm_08_08.h: Add constants for Channel Type in signalling modeSylvain Munaut2019-02-171-0/+14
| | | | | | | | This is from TS 08.08 3.2.2.11 directly. The choices for Data mode and Speech mode were already present, but not for Signalling mode Change-Id: I9e24841ea877a9a78dc4d2bd14cbf60c4bea79a6 Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
* gsm/gsm0480: introduce gsm0480_create_release_complete()Vadim Yanitskiy2019-02-081-1/+3
| | | | | | | | | | | | In OsmoMSC, it's required to be able to specify a particular GSM 04.07 transaction ID for GSM 04.80 Release complete message instead of the hard-coded value, that is used gsm0480_create_ussd_release_complete(). Let's finally deprecate gsm0480_create_ussd_release_complete(), and introduce a new function without USSD prefix, as this message is also used in other "structured" supplementary services. Change-Id: Ie3ac85fcef90a5e532334ba3482804d5305c88d7
* protocol/gsm_04_14: Fix the OPEN LOOP message typeSylvain Munaut2019-02-071-1/+1
| | | | | Change-Id: Id4350dee4353ebf9de0450dd5dab6e4f2ee7c3a6 Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
* gsm0808: Add CSFB indication IE to BSSMAP CLEAR COMMANDPhilipp Maier2019-02-051-0/+1
| | | | | | | | | | | When a call that was established in a CSFB context ends the CLEAR COMMAND that is send from the BSC to the MSC should contain a CSFB indication IE, which consists of just the IE byte itsslef. This additional IE tells the BSC to include other CSFB related IEs into the RR Release message. Change-Id: Id8a75e1da2d5f520064666e4ee413d1c91da6ae3 Related: OS#3778
* gsm_08_08.h: Add IEI definitions from Release 15Harald Welte2019-02-051-0/+5
| | | | Change-Id: If3649606ba7c25121e30ed02939ca08c94665be5
* Extend gsm_04_08.h with CSFB related definitiosn form 44.018 Rel 15Harald Welte2019-02-051-0/+2
| | | | | | These are some IEI definitions that we'll need for CSFB Fast Return Change-Id: I0e101af316438b56d63d43fc2cb16d7caf563d07
* GSUP: deprecate osmo_gsup_get_err_msg_type()Oliver Smith2019-02-041-2/+14
| | | | | | | | | | | | | | Replace osmo_gsup_get_err_msg_type() with a wrapper to OSMO_GSUP_TO_MSGT_ERROR(). This macro assumes, that all error messages are (request message | 0x000001). Add a big comment header for osmo_gsup_message_type, describing this already implicitly followed rule and therefore making it explicit. With this change, we don't need to maintain the request -> error message mapping in osmo_gsup_get_err_msg_type() anymore. Related: Iec1b4ce4b7d8eb157406f006e1c4241e8fba2cd6 (osmo-gsm-manuals) Change-Id: I46d9f2327791978710e2f90b4d28a3761d723d8f
* add osmo_classmark_* APINeels Hofmeyr2019-01-291-0/+16
| | | | | | | | | osmo-bsc and osmo-msc implement identical Classmark structures. It makes sense to define once near the gsm48 protocol definitions. Also move along some generic Classmark API from osmo-msc. Change-Id: Ifd27bab0380f7ad0c44c719aa6c8bd62cf7b034c
* gsm0808: add BSSMAP Cell Identifier matching APINeels Hofmeyr2019-01-282-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | Add * osmo_lai_cmp() (to use in gsm0808_cell_id_u_matches()) * osmo_cgi_cmp() (to use in gsm0808_cell_id_u_matches()) * gsm0808_cell_id_u_match() (to re-use for single IDs and lists) * gsm0808_cell_ids_match() * gsm0808_cell_id_matches_list() * Unit tests in gsm0808_test.c Rationale: For inter-BSC handover, it is interesting to find matches between *differing* Cell Identity kinds. For example, if a cell as CGI 23-42-3-5, and a HO for LAC-CI 3-5 should be handled, we need to see the match. This is most interesting for osmo-msc, i.e. to direct the BSSMAP Handover Request towards the correct BSC or MSC. It is also interesting for osmo-bsc's VTY interface, to be able to manage cells' neighbors and to trigger manual handovers by various Cell Identity handles, as the user would expect them. Change-Id: I5535f0d149c2173294538df75764dd181b023312
* constrain gsm48_generate_mid() output array boundsHarald Welte2019-01-221-0/+1
| | | | | | | | | | | The longest BCd-digit type identity is the IMEISV with 16, so there's no point in trying to parse up to 255 decimal digits, which will do nothing but to overflow the caller-provided output buffer. Let's also clearly define the required minimum size of the output buffer and add a reltead #define for it. Change-Id: Ic8488bc7f77dc9182e372741b88f0f06100dddc9
* gsm_23_003.h: add GSM23003_IMEI_NUM_DIGITS_NO_CHKOliver Smith2019-01-211-0/+3
| | | | | | | Add new define for the 14 digit IMEI without the Luhn checksum, as it is used in OsmoHLR. Change-Id: I02b54cf01a674a1911c5c897fbec02240f88b521
* Prevent GCR encoder/decoder functions from being used directlyMax2019-01-191-2/+2
| | | | | | | | They only make sense in the context of LCLS so far - let's make sure they're not used by external projects directly instead of gsm0808_*() counterparts. Change-Id: I4ae5a3472a20492d5f76170b722e4e2274a5c433
* LCLS: make GCR into static member of osmo_lclsMax2019-01-191-1/+2
| | | | | | | | | Most of the time we'll have GCR filled anyway so it make sense to have it as static parameter instead of a pointer to separately allocated structure. Update tests to cover both static and dynamic osmo_lcls allocation variants. Change-Id: I905c36d8455911c68c30bc429379b7313dd46aea
* LCLS: add status parameter to Assignment Completed messageMax2019-01-191-0/+6
| | | | | | | | | | * add gsm0808_create_ass_compl2() with additional gsm0808_lcls_status parameter and make gsm0808_create_ass_compl() into trivial wrapper around it * update tests accordingly Change-Id: I547c6b8707123aa8c1ef636db88908df112d90a4 Related: OS#2487
* LCLS: add GCR comparison helperMax2019-01-141-0/+1
| | | | Change-Id: I9e3b5560a058b976638d03cb819415d237ae9984
* comments: update/fix three 3GPP spec referencesNeels Hofmeyr2019-01-143-3/+3
| | | | Change-Id: I3ab94f362866d752099000afe62922288b3dd118
* change GSM48_CMSERV_* to enum type, add namesNeels Hofmeyr2019-01-141-7/+14
| | | | | | | Prepare handling multiple CM Service Requests in osmo-msc: an enum is more clear than an int and #defines for passing around and count CM Service types. Change-Id: I9c2a7adc45ab7a1a7519168e965e7d805e1481ff
* gsm23003: add osmo_imei_str_valid()Oliver Smith2019-01-141-0/+1
| | | | | | | | | | | Verify 14 digit and 15 digit IMEI strings. OsmoHLR will use the 14 digit version to check IMEIs before writing them to the DB. Place the Luhn checksum code in a dedicated osmo_luhn() function, so it can be used elsewhere. Related: OS#2541 Change-Id: Id2d2a3a93b033bafc74c62e15297034bf4aafe61
* port rest octets encoding code from osmo-bscStefan Sperling2019-01-121-0/+87
| | | | | | | | | | | | | | | | | | | | | | | | | | As part of fixing issue OS#3075, we want to migrate support for encoding system information from osmo-bsc to libosmocore. This change ports osmo-bsc code for encoding SI rest octets. The conversion was a bit tricky in some places because some functions receive a 'struct gsm_bts' parameter in osmo-bsc. In this libosmocore version, such functions expect parameters which correspond to the individual fields of 'struct gsm_bts' which are used by these functions. Several structs from osmo-bsc's system_information.h are now also declared in libosmocore headers, with an added osmo_ prefix to avoid collisions with existing definitions in osmo-bsc. Some helpers were ported from osmo-bsc's system_information.c to libosmocore's gsm48_rest_octets.c. Contrary to osmo-bsc's implementation they are now only visible within this file. Unfortunately, this code ported from osmo-bsc lacks unit tests. Change-Id: I47888965ab11bba1186c21987f1365c9270abeab Related: OS#3075
* port arfcn range encode support from osmo-bscStefan Sperling2019-01-121-0/+25
| | | | | | | | | | | | | | As part of fixing issue OS#3075, we want to migrate support for encoding system information from osmo-bsc to libosmocore. This change ports one of the prerequisites for doing so: osmo-bsc code for range-encoding ARFCNs, including tests. An osmo_gsm48_ prefix has been prepended to public symbols in order to avoid clashes with existing symbols in osmo-bsc code. Change-Id: Ia220764fba451be5e975ae7c5eefb1a25ac2bf2c Related: OS#3075
* LCLS: use proper types for value_string wrappersMax2019-01-091-3/+3
| | | | Change-Id: I0f47a610e06ac99bd60a5aad6f50f3658480165e
* Cosmetic: GSUP: note "on wire" for imei_resultOliver Smith2019-01-091-2/+2
| | | | | | | | | | | | | | Note that OSMO_GSUP_IMEI_RESULT_ACK is 0 on the wire, although the enum value is 1. Same with NACK (1 on wire, enum 2). I had implemented enum osmo_gsup_imei_result after enum osmo_gsup_cancel_type above, where this comment exists as well, and I incorrectly assumed that enum osmo_gsup_cn_domain in the middle was also implemented this way and therefore adding the comments to each enum would be redundant. But for cn_domain, the values on the wire are the same as the enum values. Change-Id: If97c34f117bfaab2232bbb625e9d118c8f390e58
* add osmo_lu_type_names[], osmo_lu_type_name()Neels Hofmeyr2019-01-081-0/+4
| | | | | | Move lupd_names[] from osmo-msc to libosmo-gsm. Change-Id: Ica25919758ef6cba8348da199b0ae7e0ba628798
* add osmo_mi_name(), for MI-to-string like "IMSI-123456"Neels Hofmeyr2019-01-081-0/+1
| | | | | | | | We have gsm48_mi_to_string() and osmo_bcd2str(), but still lack a function that conveniently prints both MI type and value in one function call. Related: http://people.osmocom.org/neels/mi_mi_mi.jpg Change-Id: I7798c3ef983c2e333b2b9cbffef6f366f370bd81
* LCLS: fix LCLS-CONNECT-CONTROL encoderMax2019-01-071-2/+2
| | | | | | | | | | | Previously it could encode both incorrect values as well as incorrect message. Let's fix this by explicitly checking for invalid values and ensuring that at least one of the parameters is valid. This function have no external or internal users so it's better to fix type signature as well to match the rest of gsm0808_create_lcls_*(). Change-Id: I7b33a771acbd391c5f9a494d6450edb18511433f
* fix typo in enum BSS_MAP_MSG_TYPE: BSS_MAP_MSG_ASSIGMENT*Neels Hofmeyr2019-01-041-3/+7
| | | | | | Keep #defines to still support previous wrong spelling. Change-Id: Id4cf812f0bc3cd40f6bfa05166f817a07a647f71
* osmo_rat_type: add OSMO_RAT_EUTRAN_SGSNeels Hofmeyr2019-01-041-0/+1
| | | | | | | osmo-msc is about to implement the SGs interface and requires a RAT indicator for that. Change-Id: I00588396bfe03feba38ecb0717d584594f0b2b46
* gsm_utils: add enum osmo_rat_type, from osmo-msc enum ran_typeNeels Hofmeyr2019-01-031-0/+13
| | | | | | | | | | | | | | | In the MSC, we have RAN types GERAN_A and UTRAN_IU, now we need a similar enum in osmo-hlr's GSUP client. Naming: in the MAP specifications, the RAN type is mostly called RAT type, (Radio Access Network vs. Radio Access Technology?). Since GSUP is more about MAP messages, I'm calling the enum osmo_rat_type. Rationale: osmo-msc and osmo-sgsn want to tell the osmo-hlr which RAT a subscriber is calling on. A subsequent patch will extend the GSUP protocol and add a RAT types IE. Change-Id: I659687aef7a4d67ca372a39fef31dee07aed7631
* LCLS: enc/dec entire parameter set instead of GCRMax2018-12-231-2/+2
| | | | | | | | | | | | | In 3GPP TS 48.008 the Global Call Reference IE is only used in HANDOVER REQUEST (§3.2.1.8) and ASSIGNMENT REQUEST (§3.2.1.1) messages which also include LCLS Config and CSC parameters. Hence, there's no point in using GCR encode/decode functions alone. Introduce gsm0808_dec_lcls() and gsm0808_enc_lcls() as trivial wrappers on top of GCR enc/dec routines which are made static. Adjust tests accordingly. Test output intentionally left unchanged. Change-Id: Icfbb2404e1a1d500243e2071173299b557369335
* GSUP: add CHECK-IMEI messageOliver Smith2018-12-211-0/+16
| | | | | | | | | | | | | | Implement necessary messages for Procedure Check_IMEI_VLR (TS 23.018 Chapter 7.1.2.9). This lets the VLR ask the EIR to check if an IMEI is valid. In the Osmocom stack, we don't have an EIR and this request will be handled by the HLR. We will be able to store the IMEI in the HLR as side-effect (OS#2541). This is roughly based on TS 29.002 8.7.1 MAP_CHECK_IMEI service, but only implements the bare minimum required IEs (imei and imei_result). Related: OS#3733 Change-Id: I085819df0ea7f3bfeb0cabebb5fd1942a23c6155
* GSUP: add end marker to enum osmo_gsup_ieiOliver Smith2018-12-211-0/+2
| | | | | | | | | | | | | Simplify gsup_test.c by defining an end marker in gsup.h. No need to manually update the last element every time anymore. The C standard guarantees, that the end marker will have the last value plus one: "Each subsequent enumerator with no = defines its enumeration constant as the value of the constant expression obtained by adding 1 to the value of the previous enumeration constant." (From C99: 6.7.2.2 Enumeration specifiers) Change-Id: I2aab7245e209f0ebd2f33a83d4d181dd3339cb17
* TLV: add convenience function for 1-byte valuesMax2018-12-201-0/+16
| | | | | | | Similar to existing 16 and 32 bit value helpers but simpler because we don't have to worry about alingment and endianness. Change-Id: Ic0a148bd04b8860e321f509fdcd913f688c8e920
* TLV: fix doc copy-paste errorMax2018-12-201-1/+1
| | | | Change-Id: I8aa79cab7505585de00ee2aaae125462108906e8
* rename CELL_IDENT_LAI_AND_LAC to CELL_IDENT_LAIStefan Sperling2018-12-191-2/+3
| | | | | | | | | The name "LAI AND LAC" makes no sense because a LAC is part of a LAI. Keep the old name available for API backwards compatibility. Change-Id: I2749cf75b7b45de0cd43cf4c696a6b6984f5a065 Related: OS#3124
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