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* properly handle mandatory cli param of gsm0808_create_paging2Stefan Sperling2018-08-291-5/+4
| | | | | | | | | | | The cell identifier list parameter is mandatory. Document it as such, and tweak code which treated it like an optional parameter. No functional change. The existing code already asserts that a non-NULL value is passed for this parameter. Change-Id: I3716f9d5b210e0a7e6f45c9fe3fc34024e5234ad Related: OS#3021
* gsm0808: inter-bsc HO messages: add missing BSSMAP header, x4Neels Hofmeyr2018-08-281-0/+12
| | | | Change-Id: I9e128ba775227de5e4010f024338a78584f777ea
* ipa: Document ipa_msg_recv* functionsPau Espin Pedrol2018-08-221-0/+22
| | | | Change-Id: Ie81e9dd9f9936a414e7cebb2bccffa6f42a302a7
* libosmogsm: (re)introduce gsm48_push_l3hdr()Vadim Yanitskiy2018-08-054-21/+38
| | | | | | | | | | | | | There was gsm0480_l3hdr_push() declared in a header file, but not exposed in 'libosmogsm.map'. Furthermore, for some reason it was a part of GSM 04.80 API, what is not actually correct. Let's rename this symbol, and properly expose it as a part of the GSM 04.08 API. Also, let's introduce an auxiliary wrapper for messages, where the transaction identifier is required (see GSM 04.07, section 11.2.3.1.2). Change-Id: I8a045efe8335d83fcbe8d43eb180972e3b1d9dda
* gsm/gsm0480.c: use the local msgb allocatorVadim Yanitskiy2018-08-051-3/+3
| | | | Change-Id: I23b4b0e1c237b9b27c1db1c9a824b5329d41a38b
* gsm/gsm0480.c: prevent NULL-pointer dereferenceVadim Yanitskiy2018-08-051-2/+10
| | | | Change-Id: I444d95941837458b46e581298f76f3a9926c8552
* comp128v23 (minor): update original code site and authorKévin Redon2018-08-041-2/+4
| | | | | | | I was contacted by the (previously unknown) author who provided the new location of the original code. Change-Id: I2dabab20ad018ce473817986bdb250131c010bf1
* re-introduce ipa_ccm_idtag_parse_off()Harald Welte2018-08-012-3/+14
| | | | | | | | | In the previous commit we deprecated ipa_ccm_idtag_parse() but also removed ipa_ccm_idtag_parse_off(), for which I couldn't find any users. However, legacy openbsc.git still uses this function, so let's re-introiduce it in its original form. Change-Id: Ibfe53b04340eb355c8bfb8453a2af1522a4b6baf
* Deprecate ipa_ccm_idtag_parse() with ipa_ccm_id_{get,resp}_parse()Harald Welte2018-08-012-9/+77
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the past, the function ipa_ccm_idtag_parse() was used to parse the payload of IPA CCM ID RESP packets. However, the function was based on a possible misunderstanding of the message encoding, and callers actually counted the first (upper) length nibble as part of the header and passed a pointer to the second (lower) length nibble of the first TLV into this function. As such, it was unfixable, and had to be replaced with a new function called ipa_ccm_id_resp_parse(). At the same time, we also add ipa_ccm_id_get_parse() to parse the slightly different format of the IPA CCM ID GET payload. We can never be 100% sure what is "correct", as our understanding of the protocol is entirely based on protocol analysis, without any official documentation available. This patch also introduces unit test coverage for both of the new functions. Revert "ipa: Add libosmogsm.map entry for ipa_ccm_idtag_parse_off" This reverts commit 7f31c90b80c08fbfe2d84d70d397402fdb38b94c. Revert "ipa: Properly parse LV stream of a ID_GET request" This reverts commit f558ed4bb9c0f00997b8f97c2b251a574c1a64c4. It introduced a function/behavior that was not originally intended: The parse of IPA CCM ID GET (8bit length followed by 1 byte tag and variable-length payload) instead of the IPA CCM ID RESP (16bit length followed by 1 byte tag and variable-length payload). Change-Id: I1834d90fbcdbfcb05f5b8cfe39bfe9543737ef8f
* oap_client: Rename symbols with osmo_ prefixHarald Welte2018-07-302-27/+27
| | | | | | | | As we're moving this to a common/shared library now, we need to use the osmo_ namespace prefix for symbol names, struct/type names and constants. Change-Id: Ie36729996abd30b84d1c30a09f62ebc6a9794950
* import oap_client into libosmogsmHarald Welte2018-07-303-1/+286
| | | | | | | | | This imports the code from osmo-msc 6afef893e17bce67e4d4119acd34d480ed03ba77 with minimal changes to make it compile. Symbol renaming to osmo_ prefix is done separately in a follow-up patch to have a as-clean-as-possible import first. Change-Id: I9bc38102318da02d1fe46ef516df3cfd6bf8e3da
* 04.80: New gsm0480_gen_{reject,return_error}() functionsHarald Welte2018-07-292-0/+66
| | | | | | | Add functions to generate TS 04.80 (supplementary services) Reject and ReturnError components. Change-Id: I6e5ee39c3d03364f7833ec717593d5ddb0a4c5f9
* USSD: Introduce gsm0480_gen_ussd_resp_7bit()Harald Welte2018-07-292-1/+23
| | | | | | | | | | Contrary to the existing gsm0480_create_ussd_resp(), the new function only generates the value part of the FACILITY IE, and not the IE Tag/Length or the 04.08 L3 header. This is needed in the context of GSUP-encapsulated USSD, as here we don't work with L3 messages, but only pass on the FACILITY IE value. Change-Id: Ide240279240322f643e142229eb7829f538c6314
* gsm0480: Factor out msgb allocation helper functionHarald Welte2018-07-292-1/+7
| | | | Change-Id: If25b467481023eadaaf3f78157eceff4b81d24d2
* fix strncpy bugs in gsm/ipa.cNeels Hofmeyr2018-07-271-7/+6
| | | | Change-Id: I423a24c55c9b9aa6fc8f501df94fe54c71ee2b2b
* Bump version: 0.11.0.91-9d4a3-dirty → 0.12.0Pau Espin Pedrol2018-07-271-1/+1
| | | | Change-Id: I7e66432f37e13fd4c31389e3d89593fa0981e58f
* gsm0808: Add value_string for encryption algorithmsPau Espin Pedrol2018-07-122-0/+13
| | | | Change-Id: Iadf6460c438d02c53c2eaa9e42d51844ad28859a
* gsm_08_08: gsm0808_permitted_speech does not have value stringsPhilipp Maier2018-07-122-0/+15
| | | | | | | enum gsm0808_permitted_speech does not have any value strings. Lets add value strings to make debugging easier. Change-Id: I5b5612a5df2758b0137a34c17f7c8c2b3f07c806
* Don't enforce Python 2 for utilitiesVadim Yanitskiy2018-07-021-1/+1
| | | | | | | | | | | The conv_gen.py utility was tested against both Python 2 and 3, so there is no need to enforce Python 2. Also, having: #!/usr/local/bin/python{2|3} is a bad idea, because Python may be installed in a different location. Change-Id: I6007d481047b584db13d6eda70fb99f11f9ddaa1
* Don't call abort() directly, always use osmo_panic()Harald Welte2018-06-281-1/+1
| | | | | | | | | A loooong time ago, we introduced osmo_panic() as a wrapper around abort(). The advantage is, that this wrapper can be overridden, and that it will also work in embedded (bare iron) targets, where the abort simply translates to an infinite loop. Change-Id: I5a70eb65952cbc329bf96eacb428b07a9da32433
* add and tweak inter-BSC HO APINeels Hofmeyr2018-06-182-2/+87
| | | | | | | | | | | | | | | | | | Add: gsm0808_create_handover_detect() gsm0808_create_handover_complete() gsm0808_create_handover_failure() To existing structs gsm0808_old_bss_to_new_bss_info and gsm0808_handover_required, add a final 'more_items' flag that makes future extensions API and ABI compatible. Fix the msgb string for Handover Request Ack. Extend some API doc comments. Related: OS#2283 (inter-BSC Handover, BSC side, MT) Change-Id: I03ee7ce840ecfa0b6a33358e7385528aabd4873f
* gsm: lapdm.c: Add missing new line char in notice log stringPau Espin Pedrol2018-06-181-1/+1
| | | | Change-Id: I92c78ea01570dc1f4be11b113c07f0aa3b342c8f
* gsm 04.80: Add value_string for component type and op codeHarald Welte2018-06-162-0/+34
| | | | Change-Id: I2615a88db5224d65f37c7cc505e183ec8b196e8a
* gsup: Add value_string for Session State IEHarald Welte2018-06-162-0/+9
| | | | | | | | In Change-Id I1cee271fed0284a134ffed103c0d4bebbcfde2a8 we added support for a new session state IE, but we didn't add any value_string array for string conversion of it. Let's fix this. Change-Id: I3d9f087786dc37c42498fa9a2be07483ec93ba7b
* gsup: Add osmo_gsup_get_err_msg_type() functionHarald Welte2018-06-112-0/+24
| | | | | | | | This function can be used to resolve the error message type for a given message type. Can be used by generic error handlers that work for any incoming message type. Change-Id: Ic637bec53dd7fe3ec83da99b49b4eae34d5602b2
* gsm/gsm0480: refactor and expose gsm0480_parse_facility_ie()Vadim Yanitskiy2018-06-112-16/+31
| | | | | | | | | | | | | | This function can be used when there is only a part of GSM 04.80 message available - Facility IE, e.g. when a message is carried over GSUP/MAP. Let's expose it. Refactoring includes the following: - adding the 'gsm0480_' prefix; - correcting inverted return value; - cosmetic code style changes. Change-Id: I623c39ffbe6cdee65eade8435a2faa04d0da193e
* gsm/gsm0480.c: introduce gsm0480_extract_ie_by_tag()Vadim Yanitskiy2018-06-112-0/+89
| | | | | | | | In some cases, there is no need to parse the whole message, e.g. during the conversion from DTAP to GSUP/MAP. This function can be used to extract given IE from a message. Change-Id: I3989d061903352473305f80712f1a1560d05df3d
* gsm0808: Add value_string for LCLS related IEsHarald Welte2018-06-022-0/+36
| | | | Change-Id: I18d7a29496929c761aeaba9c0aee847befc13108
* GSUP: introduce new messages for SS/USSD payloadsVadim Yanitskiy2018-05-311-0/+15
| | | | | | | | | | | | | | | | | In order to be able to transfer SS/USSD messages via GSUP, this change introduces the following new message types: - OSMO_GSUP_MSGT_PROC_SS_*, and the following new IE: - OSMO_GSUP_SS_INFO_IE which represents an ASN.1 encoded MAP payload coming to/from the mobile station 'as is', without any transcoding. Change-Id: Ie17a78043a35fffbdd59e80fd2b2da39cce5e532 Related: OS#1597
* GSUP: implement TCAP-like session managementVadim Yanitskiy2018-05-311-0/+16
| | | | | | | | | | | | | | | | | | | | Unlike TCAP/MAP, GSUP is just a transport layer without the dialogue/context. This prevents us from having session based communication, required e.g. for USSD. But we can emulate TCAP dialogue by adding additional IEs, which would allow to relate each message to a particular session. This change introduces the following IEs: - OSMO_GSUP_SESSION_ID_IE, - OSMO_GSUP_SESSION_STATE_IE, which optionally can be used to indicate that the message is related to a session with given ID, and to manage session state, i.e. initiate, continue, and finish. Change-Id: I1cee271fed0284a134ffed103c0d4bebbcfde2a8 Related: OS#1597
* gsm0808: Add encoding functions for LCLS BSSMAP messagesHarald Welte2018-05-302-0/+63
| | | | Change-Id: Ib83143e467df068b7d462a8e51d94b9d961ce18f
* gsm0480: fix: don't overwrite the data of RELEASE_COMPLETEVadim Yanitskiy2018-05-291-2/+6
| | | | | | | | | | | According to the 3GPP TS 04.80, table 2.5 'Release complete', a RELEASE_COMPLETE message may containg optional FACILITY element. Meanwhile, the 0xff byte is used to indicate that there is no decoded message (legacy field). Let's avoid overwriting of a decoded message. Change-Id: I0c85292222749a48ca0c4b2e93f4fa2d61468c18
* add gsm0808_create_handover_request_ack()Neels Hofmeyr2018-05-272-0/+26
| | | | | Related: OS#2283 (inter-BSC Handover, BSC side, MT) Change-Id: I692292a06c7d66004404560dc4ed933ca9107f9b
* add support for gsm0808 HANDOVER REQUIRED messageNeels Hofmeyr2018-05-272-0/+71
| | | | | Related: OS#2283 (inter-BSC Handover, BSC side, MO) Change-Id: Idb6dc3eab0282158a17091d97ed77c1e2e3eb3c2
* add gsm0808_cell_id_to_list()Neels Hofmeyr2018-05-272-0/+32
| | | | | | | | The idea is to be able to add a gsm0808_cell_id to a gsm0808_cell_id_list2: first convert it to a list, then re-use gsm0808_cell_id_list_add(). It will be used by osmo-bsc to manage neighbor-BSS cell identifiers from VTY. Change-Id: Ibf746ac60b1b1e920baf494b396658a5ceabd788
* mncc: properly export osmo_mncc_name()Harald Welte2018-05-242-4/+1
| | | | | | | For some strange reason, the osmo_mncc_name() inline function was not in the mncc.h header, but in the mncc.c file. Let's fix that. Change-Id: I2c3666510c981dffa4ba25bed517fd7ebd1250f5
* gsm: kasumi: Fix dynamic-stack-buffer-overflow on out buffers not multiple ↵Pau Espin Pedrol2018-05-171-1/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | of 64 bits Fixes following AddressSanitizer report during gea_test run with gcc 8.1.0: ==8899==ERROR: AddressSanitizer: dynamic-stack-buffer-overflow on address 0x7ffc5f1719bb at pc 0x7fe574adc5fe bp 0x7ffc5f171460 sp 0x7ffc5f171450 WRITE of size 1 at 0x7ffc5f1719bb thread T0 #0 0x7fe574adc5fd in osmo_store64be_ext ../../include/osmocom/core/bit64gen.h:75 #1 0x7fe574adc649 in osmo_store64be ../../include/osmocom/core/bit64gen.h:104 #2 0x7fe574ade936 in _kasumi_kgcore libosmocore/src/gsm/kasumi.c:186 #3 0x7fe574ae2532 in gea4 libosmocore/src/gsm/gea.c:44 #4 0x7fe574ae266c in gea3 libosmocore/src/gsm/gea.c:60 #5 0x7fe574a9b616 in gprs_cipher_run libosmocore/src/gsm/gprs_cipher_core.c:95 #6 0x56422d3fb2ee in test_gea libosmocore/tests/gea/gea_test.c:29 #7 0x56422d3fb506 in main libosmocore/tests/gea/gea_test.c:49 #8 0x7fe5730f406a in __libc_start_main (/usr/lib/libc.so.6+0x2306a) #9 0x56422d3fadf9 in _start (libosmocore/tests/gea/.libs/lt-gea_test+0x1df9) The kasumi_test is updated to calculate the entire array of bits according to expected result. Before this commit it worked by writing the entire last 64bit block, and addressSanitizer cannot catch it because the allocated buffer is 64bit aligned too. Change-Id: I7b2a0224a3b5527d5a3ad7e17efc73081b63eac1
* fix spellingThorsten Alteholz2018-05-151-2/+2
| | | | Change-Id: I3ac92217f83279d5f987ab34eb18b2e6cb1c7812
* lapdm: don't enforce contention resolution on SAPI0/DCCHHarald Welte2018-05-091-5/+2
| | | | | | | | | | | | | | | | | | | In Change-Id: I8c2c103cdc7f9a45d7b2080c572f559fc3db58e4 we introduced a check to enforce contention resolution always being used in MS-originated LAPDm establishment on the main DCCH / SAPI0. This is only required after RACH request (IMM.ASS.) and not after a normal assignment command which was sent already via a dedicated channel. Hence, we cannot enforce a strict requirement for contention resolution in those cases. We *could* use the RSL Channel Activation type as a constraint on whether or not to enforce contention-resoluiton-only LAPDm establishment, but this is out of the scope of the LAPDm code but would have to be done inside OsmoBTS. Related: OS#3252 Change-Id: Id903492ee90809fe98defcf4abc0419b8150069f
* lapdm: send_rslms_rll_l3_ui(): Don't include B4/SACCH IE unless neededHarald Welte2018-05-081-3/+5
| | | | | | | | | | | | | | The RSL_IE_MS_POWER / RSL_IE_TIMING_ADVANCE is how we communicate the SACCH L1 header values on the MS side between LAPDm and L3 (which is a non-standard use of RSL). However, those IEs only maek sense on the SACCH, where we have B4 frame format and where we actually have a L1 header containing related information. Let's make sure to skip those IEs on regular RLL UNIT DATA INDICATION happening on other channel types. Change-Id: I6f13e02192531479287f71de674d17ca2ceabdc6 Closes: OS#3249
* lapdm: cleanup: send_rslms_rll_l3_ui(): Use msgb_tv_push()Harald Welte2018-05-081-9/+5
| | | | | | | | This is a purely cosmetic clean-up to use the msgb_tv_push() API to pre-pend a Tag-Value IE to a msgb, rather than the existing open-coding approach. Change-Id: I19bbfa1e327a617685ed11d4182e533df33215cb
* add gsm0808 channel enum to IE val conversion functionsNeels Hofmeyr2018-05-082-0/+10
| | | | | | | | | | | | | | | | | Add: - gsm0808_current_channel_type_1() - gsm0808_permitted_speech() - gsm0808_chosen_channel() - gsm0808_channel_type_name() gsm0808_permitted_speech() is moved from osmo-bsc's bssap_speech_from_lchan(); gsm0808_chosen_channel() is moved from osmo-bsc's lchan_to_chosen_channel(); Rationale: will be re-used by inter-BSC handover, makes sense to keep with the other gsm0808 utils. Related: OS#2283 (inter-BSC handover, BSC side) Change-Id: I8a3cc5d4548e9a78d945d54c69ccced251edcec9
* lapdm: Implement SABM related constraintsHarald Welte2018-05-081-0/+45
| | | | | | | | | | * MO SAPI0 establishment *must always* have L3 payload for contention resolution * SAPI3 establishment *must never* use contention resolution * MT establish must never use contention resolution Change-Id: I8c2c103cdc7f9a45d7b2080c572f559fc3db58e4 Closes: OS#2370
* lapdm: Fix back-pointer from lapdm_entity to lapdm_channelHarald Welte2018-05-041-0/+2
| | | | | | | | It seems that during all those years it has never been noted that the back-pointer from the lapdm_entity to the lapdm_channel was never initialized. Let's fix that. Change-Id: Iaca66cd6a2c9f315561e365b51163927868fc346
* gsm_utils: call gnutls_global_init() as constructorAlexander Couzens2018-05-021-0/+19
| | | | | | | | | | gnutls_global_init must be called at least once for gnutls < 3.3.0. It doesn't hurt calling it twice, except a reference counter is increased. gnutls >= 3.3.0 will call it automatic. Fixes: OS#2986 Change-Id: I241b6ae5aa8df13dd78f04658cf0953e9561c9e2
* RSL/LAPDm: Not all RLL message are "transparent"Harald Welte2018-04-191-3/+21
| | | | | | | | | | 3GPP TS 48.058 has a very clear definition of which messages are "transparent" and hence have the T-bit == 1. This is *not* just all RLL messages, but basically only RLL_DATA.{ind,req} and RLL_UNITDATA.{ind,req}. All other messages are non-transparent. Change-Id: I9f83654af189d818563d799bf623325b7fee8e70 Closes: OS#3188
* add gsm0808_cell_{id,id_list}_name() and friendsNeels Hofmeyr2018-04-182-0/+149
| | | | | | | | | | | | | | | | | | | | Provide comprehensive API to obtain string representations of Cell Identifiers and -Lists. Change gsm0808_test.c to use the new functions (which simplifies the output a bit), so that we don't duplicate printing code in gsm0808_test.c, and so that the not-so-trivial printing code is also tested. In gsm0808_test, also test gsm0808_cell_id_list_name_buf()'s return value and truncation behavior. The rationale for gsm0808_cell_id_list_name(), i.e. printing an entire list of cell identifiers, is that even though the maximum is 127 elements, a list of more than a few elements is hardly ever expected in practice (even more than one element isn't actually expected: either "entire BSS" or a single LAC). It is thus useful to log the entire list when it shows up in Paging and Handover. Change-Id: I9b2106805422f96c5cc96ebb9178451355582df3
* gsm/gsm48.c: add call independent SS message namesVadim Yanitskiy2018-04-171-0/+12
| | | | Change-Id: I697639d8469e5dda617b27995c4a92e1f0c0bead
* protocol/gsm_04_08.h: drop incorrect GSM48_PDISC_USSDVadim Yanitskiy2018-04-171-1/+0
| | | | | | | | | | | | According to the GSM TS 04.07, section 11.2.3.1.1 "Protocol discriminator", bits 1 to 4 of the first octet of a standard L3 message contain the protocol discriminator IE. Meanwhile, the GSM48_PDISC_USSD represents value 0x11, i.e. 0b10001, that requires 5 bits, and moreover it is not documented anywhere. Let's drop it. Change-Id: Ic4eb8a6db4ff1dfd535bd0c84e7acf1908422f64
* prevent integer underflow in ipa_ccm_make_id_resp_from_req()Harald Welte2018-04-171-1/+6
| | | | | | | don't blindly trust the tag-length value in an IPA CCM ID GET message. This could result in a remotely-triggered integer underflow. Change-Id: I4723361e1094b358310541a7dc4c5c921c778a15
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