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2017-03-16IuCS: rapidly release connectionsNeels Hofmeyr1-0/+2
Do the same as we do in 2G: release the connection as soon as nothing else is pending for a given subscriber. Before, osmo-msc would wait for the UE "to get bored" and send an Iu release. But the CN should stay lean on connections. Also, 25.413[1] in section 7, 6th point states: "While the Iu release is managed from the CN, the RNC has the capability to request the release of all Iu connection resources from the corresponding Iu connection." So far we did not manage Iu release from osmo-msc at all. Use the same mechanism we use in 2G: from msc_release_connection(), just before freeing the gsm_subscriber_conn, invoke a CN initiated Iu Release command to the UE. This works around OS#1816 ("USSD only works when IuCS is released", on nano3G), because the Iu conn is now released right after every signalling, so that typically no two requests will use the same conn. In iu.h/iu.c, add iu_tx_release(), absorbing almost all of the code from ranap_handle_co_iu_rel_req(). Add stub to db_test.c, necessary to build it without linking libiu. [1] 3GPP TS 25.413 v12.4.0 Release 12 / ETSI TS 125 413 V12.4.0 (2015-04) Related: OS#1816 Change-Id: Ic12bd6f3666f6fd42bd6d9fdae1c93abee3b6786
2017-03-16IuCS: store assigned rab_id in gsm_subscriber_connectionNeels Hofmeyr1-0/+1
Change-Id: I7fda4304631fc24bbd1bebe911b8403a942fcf53
2017-03-16bridge calls via mgcpgwNeels Hofmeyr1-0/+1
Change-Id: Ie259e30bc532fe9817c96562022ac33443d5747a
2017-03-16IuCS: implement msc_call_assignment() for IuCSNeels Hofmeyr1-0/+3
Send IuCS RAB Activation upon MNCC_CALL_PROC_REQ. Implement function msc_call_assignment(): decide between sending A-iface BSSMAP Assignment Request or IuCS RAB Assignment Request. Implement iu_rab_act_cs() to send the IuCS RAB Assignment Request. The IP address and port of the MGCPGW sent in the RAB Assignment are still hardcoded. The A-interface extension is not implemented yet. Declare ranap_new_msg_rab_assign_voice() to avoid including ranap_msg_factory.h, which would require adding ASN1 CFLAGS to Makefile.am. The mgcpgw_client as well as some more osmo-iuh functions are now linked from libmsc, hence add some dummy stubs to libiudummy and db_test.c. Change-Id: Iaae51d1fbbfc28fad1c0b85e161d53d80a420a19
2017-03-16msc: add mgcpgw client (with dummy read cb so far)Neels Hofmeyr1-0/+6
Store the mgcpgw client data in struct gsm_network. Initialize VTY and bind the client. Change-Id: Ifc4efb1ca44fa34c29bf23b35addb54155296d68
2017-03-16libmgcp: add mgcpgw client APINeels Hofmeyr2-0/+48
Add an API to send MGCP messages to an MGCP GW, from the perspective of an MSC instructing the GW to setup RTP streams. Rationale: the mgcp_protocol.h is mostly for the MGCP GW itself, other implementations forward incoming MGCP messages. So a simpler approach for an MGCP GW client is useful. Add general VTY commands that can be used to configure mgcpgw_client. osmo-msc is going to use this to route RTP streams (for 3G at first). Change-Id: I6fe365c4c89207f2172943cc456b508a207b1135
2017-03-16libmgcp: add value strings for mgcp_connection_modeNeels Hofmeyr1-0/+7
Add file mgcp_common.c to implement the value strings for the mgcp_connection_mode. Add in a separate file because of the upcoming mgcpgw_client.c implementation, introducing a file that contains implementations commonly used in MGCP GW as well as its clients. Change-Id: I6fe365c4c89207f2172943cc456b508a207b1135
2017-03-16libmgcp: move mgcp_connection_mode to public headerNeels Hofmeyr2-8/+8
mgcp_connection_mode will be used by the upcoming mgcpgw_client.h API. Change-Id: I7a3f8905723320d968f1a53c1036904107b4fb2d
2017-03-16IuCS: cosmetic prep for msc_call_assignment()Neels Hofmeyr1-0/+1
Rename gsm48_cc_tx_call_proc() to gsm48_cc_tx_call_proc_and_assign() to mark the place where the A-interface will send a BSSAP Assignment Request / where the IuCS-interface will send a RAB Assignment Request. Add function msc_call_assignment() to decide between A-iface and IuCS assignment, to be implemented in subsequent commit. Change-Id: I0695e233d57d13658793b0e63bb7c3ff224909a0
2017-03-16IuCS: send RANAP CommonIDNeels Hofmeyr3-0/+6
Add libiu function to send a CommonID message down a UE connection, iu_tx_common_id(); add also a corresponding stub to libiudummy for linking with tests. Add libmsc function msc_tx_common_id() to call the above. Add this mostly to clearly indicate in msc_ifaces.h that libmsc is calling out of the MSC; also to do conn->via_iface checking. Call msc_tx_common_id() after ciphering is established, in _gsm48_rx_mm_serv_req_sec_cb()'s GSM_SECURITY_SUCCEEDED case. Change-Id: I576ddd5bbabfc989149debd2f8a9743db6d26043
2017-03-16LU counters: count completion and failure, not messages sentNeels Hofmeyr1-4/+4
From a human admin viewpoint it doesn't make sense to count the messages sent: When we use TMSIs, we first send a LU Accept with a new TMSI, and then expect the MS to respond with a TMSI Realloc Complete message. When that fails to come through, the LU actually ends in failure, even though a LU Accept was sent. In 3G, if a UE sends an Iu Release during LU (e.g. user enables flight mode), we cancel the LU without sending any reply at all, so nothing would be counted. Instead, count Location Updating results, i.e. completion and failures.
2017-03-16comment on mscsplit, indent commentNeels Hofmeyr2-0/+8
2017-03-16move to libbsc: lchan_next_meas_rep() -- TODO really?Neels Hofmeyr1-1/+0
Change-Id: I4ea799c5fa61f81c404e6ef1b9ac86a8faa1fb49
2017-03-16move to libbsc: gsm_bts_neighbor() -- TODO really?Neels Hofmeyr1-4/+0
Change-Id: I63d4835dc7aabdf176e0ca634a6a4ca527612693
2017-03-16paging: change subscr_paging_cb() into subscr_rx_paging_response()Neels Hofmeyr1-0/+2
Remove one layer of callback indirection in paging. When a paging response arrives, we always want to first secure the connection, thus a fixed subscr_rx_paging_response() function is more appropriate and avoids having to store a cbfn. The actual actions to be taken upon successful paging are of course still in callback functions stored with each subscriber. Remove paging_request_stop() call from subscr_paging_dispatch(), which stops paging on all BTSs, which is not the responsibility of libmsc. Change-Id: Ic2c785c9cc48b2c2c6557cbe1060d25afa89e38d
2017-03-16subscr_request_channel() -> subscr_request_conn()Neels Hofmeyr1-3/+4
Change-Id: Ife8e10b240693a8d369139881774f1892044aa65
2017-03-16move subscr_request to gsm_subscriber.hNeels Hofmeyr1-2/+14
Change-Id: Idbbd39b0e068da17aafa97e315143509c69c50ea
2017-03-16add gsm_encr to subscr_connNeels Hofmeyr1-0/+1
Change-Id: Id5797cd1f1bfa2cca2d3fbabc1981aa75546421b
2017-03-16libmsc: duplicate gsm0808 / gsm48 functions (towards BSC)Neels Hofmeyr1-0/+8
In osmo-nitb, libmsc would directly call the functions on the BSC level, not always via the bsc_api. When separating libmsc from libbsc, some functions are missing from the linkage. Hence duplicate these functions to libmsc, add an msc_ prefix for clarity, also add a _tx to gsm0808_cipher_mode(): * add msc_gsm0808_tx_cipher_mode() (dummy/stub) * add msc_gsm48_tx_mm_serv_ack() * add msc_gsm48_tx_mm_serv_rej() Call these from libmsc instead of * gsm0808_cipher_mode() * gsm48_tx_mm_serv_ack() * gsm48_tx_mm_serv_rej() Also add a comment relatd to msc_gsm0808_tx_cipher_mode() in two places. Change-Id: I5b276853d3af71f5e3f0a031fd17b4fff0580020
2017-03-16msc_compl_l3(): publish in .h, tweak return valueNeels Hofmeyr1-0/+8
Use new libmsc enum values for return val, to avoid dependency on libbsc headers. Make callable from other scopes: publish in osmo_msc.h and remove 'static' in osmo_msc.c Change-Id: If24007445899e9c75553a0dbf843ada3566b3380
2017-03-16add msc vty, remove nitb vtyNeels Hofmeyr1-0/+2
Change-Id: I8f8980d6cfbf26f1b0e0197939833e55dbe521fb
2017-03-16add iucs.[hc]Neels Hofmeyr2-0/+8
Change-Id: I88e981f4c31393a98ae8d61176c65c9251a6f28b
2017-03-16add DIUCS debug log constantNeels Hofmeyr1-0/+1
Change-Id: Id347a3024fa495a1ab680db7320648d933a4018b
2017-03-16gsm_04_08, gsm_subscriber: decouple lac from btsNeels Hofmeyr1-1/+1
The idea is to not have a direct pointer to a bts struct (into BSC land), but a LAC to resolve the BSC or RNC depending on the appropriate A or IuCS interface. subscr_update(): remove bts arg, add lac arg. Pass conn->lac to gsm48_generate_lai() instead of bts->location_area_code. Change-Id: I9f2b298a785bf4b2a1b3fcdd91b8256106b2d9de
2017-03-16move t3212 to network level (periodic lu)Neels Hofmeyr1-0/+3
Set the T3212 default value in struct gsm_network and take that value when creating a BTS. Adjust VTY accordingly. Change-Id: Ifb730f9d0106fe195adc30459a39290a07313b50
2017-03-16Prepare entry/exit point for MSC -> BSC and MSC -> RNC communication.Neels Hofmeyr3-0/+55
Add msc_ifaces.[hc], a_iface.c, with a general msc_tx_dtap() to redirect to different interfaces depending on the actual subscriber connection. While iu_tx() is going to be functional fairly soon, the a_tx() is going to be just a dummy for some time (see comment). Add Iu specific fields in gsm_subscriber_connection: the UE connection pointer and an indicator for the Integrity Protection status on Iu (to be fully implemented in later commits). Add lac member to gsm_subscriber_connection, to allow decoupling from bts->location_area_code. The conn->lac will actually be set in iu.c in an upcoming commit ("add iucs.[hc]"). Change-Id: Idf8020a30562426e8f939706bf5c2188d5a09798
2017-03-16sgsn init: pass sgsn_config pointer to sgsn_vty_init(), not sgsn_parse_configNeels Hofmeyr1-2/+2
It makes sense semantically, and prepares for an upcoming commit that uses the internal global config pointer in sgsn_vty_init(), which would not be defined yet without this. Change-Id: Ie4cf1c0a1c9e6330a134ff4b7b2e6d5699c12bd7
2017-03-16gsup_client: allow passing a unit id to identify with HLRNeels Hofmeyr2-5/+7
Before, each GSUP client would contact the HLR with an identical unit id, i.e. "SGSN-00-00-00-00-00-00", with the result that some messages were sucked off by the wrong client. Pass explicit unit name from each gsup client user, so that OsmoMSC is "MSC" and OsmoSGSN is "SGSN". Hence the HLR can properly route the messages. Todo: also set some values instead of the zeros. Change-Id: I3f8d6dd47c7013920e2a4bde006ed77afd974e80
2017-03-16vlr: get SMS working, by SMS recipient MSISDN round-robinNeels Hofmeyr1-3/+8
The SQL based lookup of SMS for attached subscribers no longer works since the SQL database no longer has the subscriber data. Replace with a round-robin on the SMS recipient MSISDNs paired with a VLR subscriber RAM lookup whether the subscriber is currently attached. If there are many SMS for not-attached subscribers in the SMS database, this will become inefficient: a DB hit returns a pending SMS, the RAM lookup will reveal that the subscriber is not attached, after which the DB is hit for the next SMS. It would become more efficient e.g. by having an MSISDN based hash list for the VLR subscribers and by marking non-attached SMS recipients in the SMS database so that they can be excluded with the SQL query already. There is a sanity limit to do at most 100 db hits per attempt to find a pending SMS. So if there are more than 100 stored SMS waiting for their recipients to actually attach to the MSC, it may take more than one SMS queue trigger to deliver SMS for subscribers that are actually attached. This is not very beautiful, but is merely intended to carry us over to a time when we have a proper separate SMSC entity. Change-Id: I1acf9debb6ba9164e6edcfd5bc5e48e8c98f2b01
2017-03-16Add msc_vlr test suite for MSC+VLR end-to-end testsNeels Hofmeyr1-0/+2
Change-Id: Ic073f3a069a7f5e7e421e0e56140f069ee9b10b8
2017-03-16Use libvlr in libmsc (large refactoring)Neels Hofmeyr17-172/+150
Original libvlr code is by Harald Welte <laforge@gnumonks.org>, polished and tweaked by Neels Hofmeyr <nhofmeyr@sysmocom.de>. This is a long series of development collapsed in one patch. The original history may still be available as branch neels/vlr_orig. TODO: This commit may be split in several smaller changes before merging to master. Related: OS#1592 Change-Id: I702ba504ce2de93507312c28eca8d11f09f4ee8b
2017-03-16Add libvlr implementationHarald Welte2-0/+405
Original libvlr code is by Harald Welte <laforge@gnumonks.org>, polished and tweaked by Neels Hofmeyr <nhofmeyr@sysmocom.de>. This is a long series of development collapsed in one patch. The original history may still be available as branch neels/vlr_orig. Related: OS#1592 Change-Id: I3f75de5f0cc2ff77f276fd39832dd3621309c4b9
2017-03-16Introduce subscriber_connection ref-countingHarald Welte2-1/+7
This introduces a reference count for gsm_subscriber_connection. Every user of the connection needs to hold a reference until done. Once the reference count dorps to zero, the connection is cleared towards the BSC (which subsequently will clear any logical channels associated with it). Related: OS#1592 Change-Id: I8c05e6c81f246ff8b5bf91312f80410b1a85f15e
2017-03-15libbsc: add chreq type for CHREQ_T_PDCH_ONE_PHASE & CHREQ_T_PDCH_TWO_PHASEAlexander Couzens2-1/+2
When using a BSC located PCU the BSC must understand PDCH requests. Change-Id: Ie7f4ed000cf1b40d269873cf0ddf5ff9f5bbc18a
2017-03-08add struct bsc_subscr, separating libbsc from gsm_subscriberNeels Hofmeyr7-11/+75
In a future commit, gsm_subscriber will be replaced by vlr_subscr, and it will not make sense to use vlr_subscr in libbsc. Thus we need a dedicated BSC subscriber: struct bsc_subscr. Add rf_policy arg to bsc_grace_paging_request() because the bsc_subscr will no longer have a backpointer to gsm_network (used to be via subscr->group). Create a separate logging filter for the new BSC subscriber. The implementation of adjusting the filter context is added in libbsc to not introduce bsc_subscr_get/_put() dependencies to libcommon. During Paging Response, fetch a bsc_subscr from the mobile identity, like we do for the gsm_subscriber. It looks like a duplication now, but will make sense for the VLR as well as for future MSC split patches. Naming: it was requested to not name the new struct bsc_sub, because 'sub' is too ambiguous. At the same time it would be fine to have 'bsc_sub_' as function prefix. Instead of struct bsc_subscriber and bsc_sub_ prefix, I decided to match both up as struct bsc_subscr and bsc_subscr_ function prefix. It's fast to type, relatively short, unambiguous, and the naming is consistent. Add bsc_subscr unit test. Related: OS#1592, OS#1594 Change-Id: Ia61cc00e8bb186b976939a4fc8f7cf9ce6aa3d8e
2017-03-07Add MS time. offset to gsm_lchanMax1-0/+6
Add MS TIMING OFFSET (3GPP TS 48.058 § 8.4.8) and P offset (3GPP TS 45.010 § 1.2) which can be used to compute MS TO from known TA. This will be used by osmo-bts (see I4dfe5c48834a083e757d5de3236a02e15a238b28) to provide MS TO as part of RSL MEASUREMENT RESULT. Change-Id: I8bda57c8d6c15bbb803eca708931556dae118a00 Related: OS#1574
2017-03-02subscriber conn: add indicator for originating RANNeels Hofmeyr1-0/+8
Add via_ran to gsm_subscriber_connection to indicate whether a conn is coming in via 2G/GERAN/A-Interface or 3G/UTRAN/Iu-Interface. Prepares for Iu, but also for libvlr to decide between GSM or UMTS Auth. Until actual Iu support is merged to master, this indicator will aid VLR unit testing. At some point we may also add RAN_GERAN_IU; it's not on the agenda yet, but to clearly distinguish the names if we want to add it, explicitly name the ones we have RAN_GERAN_A and RAN_UTRAN_IU. Change-Id: I93b870522f725170e4265a5543f6b680383d7465
2017-02-28silent_call: remove unfinished fuzzer interfacePhilipp Maier1-0/+3
Remove the fuzzer interface that was partially implemented in gsm_04_08.c and silent_call.c is causing problems when an SMS is sent during an active silent call. The reason for this is that gsm0408_dispatch() in gsm_04_08.c would decide to rout all uplink traffic to silent_call_rx() in silent_call.c. silent_call_rx() is a stub function that discards the data. This patch removes the fuzzer interface code by placing ifdefs around it, so that it can be re-activated by experimentators. Change-Id: Id500197d58663b3f4b1756136343670388b0a4bc
2017-02-27SGSN: Integrate support for UMTS AKANeels Hofmeyr1-1/+6
The general infrastructure for UMTS AKA is already in place: * GSUP with capability to send us auth_vectors that contain either triplets or quintuples * mm_context that holds such auth_vectors Add: * capability to send UMTS AUTN in GMM AUTH REQ * parse extended UMTS RES * on auth response, validate expected AKA with vector and received res/sres * add Auth Failure message to receive resync AUTS token and * send to HLR * clear out-of-sync auth tuple * enter new state for when we're waiting for HLR to resync and send new tuples so that the next Auth Request will be handled Original first half of this patch by: Harald Welte <laforge@gnumonks.org> Full UMTS AKA procedure including AUTS resync tested to work against OsmoHLR with R99 USIM and Milenage algorithm. The sgsn_test.c needs adjustment because we're checking the vector's auth_types now. Depends: libosmocore change-ids I277fb3d407396dffa5c07a9c5454d87a415d393f If943731a78089f0aac3d55245de80596d01314a4 Related: OS#1956 Change-Id: Ie6a0cefba5e4e7f02cc2eaf6ec006ac07d5c1816
2017-02-25add struct gprs_subscr, separating gprs from gsm_subscriberNeels Hofmeyr5-10/+44
Prepare for replacing gsm_subscriber with vlr_subscriber. vlr_subscriber will not make sense to be used in gprs, so have a dedicated GPRS subscriber struct. (Could change if the gprs code were to use libvlr; is currently independent). Related: OS#1592 Change-Id: Ia8b391ee009c8545763cba04505be3947835120e
2017-02-24cosmetic: rename struct osmo_msc_data to bsc_msc_dataNeels Hofmeyr4-13/+13
With the OsmoMSC program coming up, the name osmo_msc_data becomes even more confusing than it already is. Clearly indicate it as libbsc's data of a remote MSC by prefixing with bsc_. Also, the Osmocom community has in the meantime agreed to have the osmo_ prefix only in libosmocore, to avoid naming conflicts in case things are moved there. So while renaming anyway, also drop the osmo_ prefix. Change-Id: I0dfbcb7d1a579211180f71319982820d8700afab
2017-02-24cosmetic: rename osmo_msc_data.h to bsc_msc_data.hNeels Hofmeyr2-1/+1
With the OsmoMSC program coming up, the name osmo_msc_data becomes even more confusing than it already is. Clearly indicate it as libbsc's data of a remote MSC by prefixing with bsc_. Also, the Osmocom community has in the meantime agreed to have the osmo_ prefix only in libosmocore, to avoid naming conflicts in case things are moved there. So while renaming anyway, also drop the osmo_ prefix. Change-Id: I13554563ce9289de126ba0d4cf329bafcda35607
2017-02-24cosmetic: clarify BSC's remote MSC data vs. OsmoMSCNeels Hofmeyr1-0/+6
Change-Id: I74dd2b3f935d39b8caa718e2c8a51cc81bddf1b9
2017-02-24cosmetic: gsm_data.h, README: rename CSCN to MSCNeels Hofmeyr1-1/+1
We're discarding the name OsmoCSCN for the benefit of OsmoMSC. But "CSCN" has already crept into the master branch in two places; apply the rename. See OS#1958 Change-Id: Ib4274eb3c172ada1fe7f05746740b456370bc93d
2017-02-23cosmetic: remove unused scall_signal_data.subscrNeels Hofmeyr1-1/+0
Doesn't make sense to switch this to struct vlr_subscr when it isn't used at all. So let's remove it. Change-Id: Ifa5901f8bf1aed3981841d24d4ec8d659f3de7a9
2017-02-22debug.h/c: remove unused cruft / cosmetic tweaksNeels Hofmeyr1-11/+1
Change-Id: I9601d478763569933bcc46bf4eaaff70a9843be9
2017-02-22logging: use central filter and ctx consts from libosmocoreNeels Hofmeyr1-15/+0
The LCHAN and BTS filter contexts are actually never used, so drop them until someone adds them properly. For now use only LOGGING_{FILTER,CTX}_VLR_SUBSCR. Some of these will change to _BSC_SUBSCR once struct bsc_subscriber is introduced, and later on, struct gsm_subscriber will be replaced by vlr_subscriber so that the names will match. Depends: libosmocore change-id I5c343630020f4b108099696fd96c2111614c8067 Change-Id: Ifa82f6a461ad4c0eeddb8a38fb3833460432d16b
2017-02-08vty: remove ignored logging parametersMax1-1/+1
Since ce9fec3e896571835ac5bfd2980d6836f2b29f0d libosmocore ignores parameters to log_vty_command_* functions. Hence parameter of logging_vty_add_cmds() is ignored too. As we depend on much later libosmocore version anyway, we can simplify code somewhat by removing parameters which will be ignored anyway. Change-Id: I62f752fd88f1d8fefa563648f9864c7c31f87991
2017-02-07gprs/sgsn: rename sgsn_mm_ctx_alloc() -> sgsn_mm_ctx_alloc_gb()Alexander Couzens1-1/+1
Postfix the ran type to clarify the purpose. Because of the new support of the Iu ran type, there are 2 functions to allocate a mm ctx. For Iu it's sgsn_mm_ctx_alloc_iu(). For gb it should be named in the same way. Change-Id: Ic49009e8c20c12308855e1409c09004698c79b95
2017-02-07gprs/sgsn: rename gprs->mm_state -> gmm_stateAlexander Couzens1-4/+4
GMM is the right term. MM state is already occupied. Change-Id: I9cfdcf921e4ebd14a5e7ce7489ec4ce5d1f5515f
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