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2017-03-16log: ciphering/security are implicit CM Service AcceptNeels Hofmeyr1-0/+1
Log just as prominently to mark CM Service Accept. Change-Id: I7afe9d4f69e5525ede7a7c380a2c48fb2c5054b6
2017-03-16debug log: upon bumping a conn, say why it is keptNeels Hofmeyr3-2/+7
Change-Id: I378af1fa06d8a45c01a80a381be143572e1dc41f
2017-03-16more specifically conclude cm service requestsNeels Hofmeyr1-0/+3
Don't end a CM Service Request "lock" too indiscriminately. Trigger only on new transactions that start. Change-Id: I4f64b8d91cfb1e61be4563594b2d6b23144af5bc
2017-03-16mostly cosmetic: have one msc_conn_close() with cause argumentNeels Hofmeyr1-1/+1
Change-Id: Ied7663f856cfce6e7ed1c0314fd558af85091dcc
2017-03-16Reinstate msc subscriber conn ref countingNeels Hofmeyr1-6/+6
Indeed the easiest way of ensuring all code paths can cause conn discarding while still all code paths can check on whether a conn needs to be discarded. Change-Id: I641fe36d9fa2077e3caf63cc583aaa380603bff0
2017-03-16mgcp: hack RAB success from nano3G: patch first RTP payloadNeels Hofmeyr1-0/+1
The ip.access nano3G needs the first RTP payload's first two bytes to read hex 'e400', or it will reject the RAB assignment. Add flag patched_first_rtp_payload to mgcp_rtp_state to detect the first RTP payload on a stream, and overwrite its first bytes with e400. This should probably be configurable, but seems to not harm other femto cells (as long as we patch only the first RTP payload in each stream). Only do this when sending to the BTS side. Change-Id: If0887b0b7714fc204f2addab2d43d44bb283ba21
2017-03-16implement utran security mode with vlrNeels Hofmeyr1-1/+1
Change-Id: Ib1e285b54cd7aaa0895e9c51a47720f446a07183
2017-03-16move iucs_ranap.[hc] to include / libmsc to use in msc_vlr testsNeels Hofmeyr2-0/+8
Change-Id: I99ca36857f5e4c9ae113017955611fd92256123c
2017-03-16vlr: allow setting assign_tmsi per-subscriberNeels Hofmeyr1-1/+2
Change-Id: I7469da0ed19e1e8b292422aadfd3ae2ebc2afd57
2017-03-16vlr on utran: transmit CommonIDNeels Hofmeyr1-3/+4
Change-Id: Ice3c71f048b097f2c2de8bd4f4508a7ca2cb1cf5
2017-03-16msc: decouple from bsc_api and btsNeels Hofmeyr1-0/+3
Change-Id: I3564291a6d20da13a8d75c71b0c425da4948d412
2017-03-16Make the code work so that the msc_vlr tests passNeels Hofmeyr6-22/+23
Change-Id: Ie8814d856bbe4c111007a696a4d26576854c134f
2017-03-16mgcp parsing, mgcp testNeels Hofmeyr2-23/+39
Change-Id: Ibe2ab17b3fa3a506a2e841ba979ea4175e3a21e8
2017-03-16mgcp: handle responses from the MGCP GWNeels Hofmeyr2-11/+50
Change-Id: I5c0493feaec775461b5a017c36b93cc2ad63c896
2017-03-16IuCS and IuPS: add VTY config for RAB Assignment address kindNeels Hofmeyr3-1/+14
To accomodate the ip.access nano3G without having to recompile, make the RAB Assignment's Transport Layer Address IE's format configurable, in both osmo-msc and osmo-sgsn. The long term perspective is to somehow detect which address encoding a given 3G cell prefers, but for the time being just configure it globally and set each ue_conn_ctx to the global setting upon creation. Add VTY command to iu_vty.c, with args passed to iu_vty_init() to insert at an arbitrary VTY node, so that it can be used both for osmo-msc and osmo-sgsn. Add generic iu_vty_config_write() to write out the config. Call iu_vty_init() from msc_vty_init(); msc_vty_init() is in libmsc, hence linking of osmo-msc now needs libiu to come after libmsc, so move that further down. Change-Id: I93728314742b327336f3fb6de98e6457f687e1f9
2017-03-16IuCS, IuPS: move flag to use X.213 NSAP addr into ue_conn_ctxNeels Hofmeyr4-1/+9
The future perspective is to remember the preferred RAB Transport Layer Address encoding for each 3G cell that is connected, so store per UE conn instead of globally hardcoding. Add rab_assign_addr_enc member to ue_conn_ctx. Thus the iu_rab_act_cs() and iu_rab_act_ps() functions no longer need the explicit use_x213_nsap argument. Add include/openbsc/common.h in order to define the enum nsap_addr_enc, in a separate file to be able to easily include it in all of libmsc, libiu and gprs/* without creating include cycles. Set the rab_assign_addr_enc when an MM ctx is created for iu, and whenever the ue_conn_ctx for an Iu MM ctx is updated. This looks a bit clumsy so far, the hope is that there will be a nice way to setup the ue_conn_ctx prior to that. Change-Id: I49bb5736df7bdfdd55d3e7b74ee559595cfd2f7d
2017-03-16iu: sort out confusion around asn_debug and asn1_xer_printNeels Hofmeyr1-1/+5
Before, I confused asn_debug with asn1_xer_print. Have two distinct VTY commands and fix documentation. Put the asn_debug and asn1_xer_print implementations in iu.c. Since they are globally defined, don't pass a pointer to iu_vty_init() but just use it directly. Might be considered less clean, but is also less bloat. Change-Id: Iccbadfe1585ba224f74cdfb5273b5ce29b6d78f0
2017-03-16iu.h: add missing includes and type defsNeels Hofmeyr1-1/+6
So far it was included only in files that also include all needed headers, but make it so that it can be included on its own. Change-Id: I08a756031b995bd01a6e15c678b845fd98de960b
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