msc_vlr_tests: don't abuse USSD-request to conclude connections

Previously the '*#100#' USSD-request was abused in order to
conclude the current subscriber connection. This makes the unit
tests depend on each other, for example, if one break something
in the GSM 09.11 implementation, a half of tests would fail.

Moreover, the further changes in the GSM 09.11 implementation
will make the results less predictable (i.e. session ID, etc.).
So let's introduce a separate unit test with simple request-
response logic, while more complex tests will be in TTCN.

Change-Id: I40b4caac3113263f5a06c861dff5e10d43c319b5

1 files changed, 206 insertions, 0 deletions

diff --git a/tests/msc_vlr/msc_vlr_test_ss.err b/tests/msc_vlr/msc_vlr_test_ss.err
new file mode 100644
index 000000000..c7f77119e
--- /dev/null
+++ b/tests/msc_vlr/msc_vlr_test_ss.err
@@ -0,0 +1,206 @@
+full talloc report on 'msgb' (total      0 bytes in   1 blocks)
+talloc_total_blocks(tall_bsc_ctx) == 12
+
+===== test_ss_ussd_geran
+- Location Update request causes a GSUP LU request to HLR
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
+  new conn
+DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
+DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
+DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
+DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
+DMM LU/new-LAC: 1/23
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_IDLE}: Allocated
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_IDLE}: is child of Subscr_Conn(LU:901700000004620)
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_IDLE}: rev=GSM net=GERAN (no Auth)
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_IDLE}: Received Event VLR_ULA_E_UPDATE_LA
+DREF VLR subscr unknown usage increases to: 1
+DVLR set IMSI on subscriber; IMSI=901700000004620 id=901700000004620
+DVLR New subscr, IMSI: 901700000004620
+DREF VLR subscr IMSI:901700000004620 usage increases to: 2
+DREF VLR subscr IMSI:901700000004620 usage decreases to: 1
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_IDLE}: vlr_loc_upd_node1()
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_IDLE}: vlr_loc_upd_post_auth()
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_IDLE}: vlr_loc_upd_post_ciph()
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_IDLE}: vlr_loc_upd_node_4()
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_HLR_UPD
+DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: Allocated
+DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: is child of vlr_lu_fsm(LU:901700000004620)
+DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HLR_VLR_E_START
+DVLR GSUP tx: 04010809710000004026f0
+GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
+DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
+DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
+DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
+DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
+DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
+  lu_result_sent == 0
+- HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
+<-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: 10010809710000004026f00804036470f1
+DVLR GSUP rx 17: 10010809710000004026f00804036470f1
+DREF VLR subscr IMSI:901700000004620 usage increases to: 2
+DVLR IMSI:901700000004620 has MSISDN:46071
+DVLR SUBSCR(MSISDN:46071) VLR: update for IMSI=901700000004620 (MSISDN=46071, used=2)
+DVLR GSUP tx: 12010809710000004026f0
+GSUP --> HLR: OSMO_GSUP_MSGT_INSERT_DATA_RESULT: 12010809710000004026f0
+DREF VLR subscr MSISDN:46071 usage decreases to: 1
+<-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: vlr_gsupc_read_cb() returns 0
+  lu_result_sent == 0
+- HLR also sends GSUP _UPDATE_LOCATION_RESULT
+<-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: 06010809710000004026f0
+DVLR GSUP rx 11: 06010809710000004026f0
+DREF VLR subscr MSISDN:46071 usage increases to: 2
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_HLR_UPD}: Received Event VLR_ULA_E_HLR_LU_RES
+DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_WAIT_FOR_DATA}: Received Event UPD_HLR_VLR_E_UPD_LOC_ACK
+DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_WAIT_FOR_DATA}: state_chg to UPD_HLR_VLR_S_DONE
+DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_DONE}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
+DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_DONE}: Removing from parent vlr_lu_fsm(LU:901700000004620)
+DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_DONE}: Freeing instance
+DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_DONE}: Deallocated
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_HLR_UPD}: Received Event VLR_ULA_E_UPD_HLR_COMPL
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_HLR_UPD}: state_chg to VLR_ULA_S_WAIT_LU_COMPL
+DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_INIT}: Allocated
+DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_INIT}: is child of vlr_lu_fsm(LU:901700000004620)
+DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_INIT}: Received Event LU_COMPL_VLR_E_START
+DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_INIT}: state_chg to LU_COMPL_VLR_S_WAIT_SUB_PRES
+DVLR sub_pres_vlr_fsm(LU:901700000004620){SUB_PRES_VLR_S_INIT}: Allocated
+DVLR sub_pres_vlr_fsm(LU:901700000004620){SUB_PRES_VLR_S_INIT}: is child of lu_compl_vlr_fsm(LU:901700000004620)
+DVLR sub_pres_vlr_fsm(LU:901700000004620){SUB_PRES_VLR_S_INIT}: Received Event SUB_PRES_VLR_E_START
+DVLR sub_pres_vlr_fsm(LU:901700000004620){SUB_PRES_VLR_S_INIT}: state_chg to SUB_PRES_VLR_S_DONE
+DVLR sub_pres_vlr_fsm(LU:901700000004620){SUB_PRES_VLR_S_DONE}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
+DVLR sub_pres_vlr_fsm(LU:901700000004620){SUB_PRES_VLR_S_DONE}: Removing from parent lu_compl_vlr_fsm(LU:901700000004620)
+DVLR sub_pres_vlr_fsm(LU:901700000004620){SUB_PRES_VLR_S_DONE}: Freeing instance
+DVLR sub_pres_vlr_fsm(LU:901700000004620){SUB_PRES_VLR_S_DONE}: Deallocated
+DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_SUB_PRES}: Received Event LU_COMPL_VLR_E_SUB_PRES_COMPL
+- sending LU Accept for MSISDN:46071
+DREF VLR subscr MSISDN:46071 usage increases to: 3
+DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_SUB_PRES}: state_chg to LU_COMPL_VLR_S_DONE
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_LU_COMPL_SUCCESS
+DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
+DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_DONE}: Removing from parent vlr_lu_fsm(LU:901700000004620)
+DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_DONE}: Freeing instance
+DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_DONE}: Deallocated
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_S_DONE
+DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
+DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
+DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
+DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
+DREF VLR subscr MSISDN:46071 usage increases to: 4
+DREF VLR subscr MSISDN:46071 usage decreases to: 3
+- BSSAP Clear --RAN_GERAN_A--> MS
+DREF VLR subscr MSISDN:46071 usage decreases to: 2
+<-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: vlr_gsupc_read_cb() returns 0
+- LU was successful, and the conn has already been closed
+  lu_result_sent == 1
+  bssap_clear_sent == 1
+DREF VLR subscr MSISDN:46071 usage increases to: 3
+  vsub != NULL == 1
+  strcmp(vsub->imsi, IMSI) == 0
+  vsub->lac == 23
+DREF VLR subscr MSISDN:46071 usage decreases to: 2
+- BSS sends BSSMAP Clear Complete
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
+DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
+DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
+DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_DONE}: Removing from parent Subscr_Conn(LU:901700000004620)
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_DONE}: Freeing instance
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_DONE}: Deallocated
+DRLL MSISDN:46071: Freeing subscriber connection
+DREF VLR subscr MSISDN:46071 usage decreases to: 1
+DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Freeing instance
+DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Deallocated
+  llist_count(&net->subscr_conns) == 0
+---
+- after a while, a new conn sends a CM Service Request
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
+  new conn
+DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
+DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
+DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000004620
+DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_INIT}: Allocated
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_INIT}: is child of Subscr_Conn(CM_SERVICE_REQ:901700000004620)
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_INIT}: rev=GSM net=GERAN (no Auth)
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_INIT}: Received Event PR_ARQ_E_START
+DREF VLR subscr MSISDN:46071 usage increases to: 2
+DREF VLR subscr MSISDN:46071 usage increases to: 3
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_INIT}: proc_arq_vlr_fn_post_imsi()
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_INIT}: _proc_arq_vlr_node2()
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_INIT}: _proc_arq_vlr_node2_post_ciph()
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_INIT}: _proc_arq_vlr_node2_post_vlr()
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_INIT}: _proc_arq_vlr_post_pres()
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_INIT}: _proc_arq_vlr_post_trace()
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_INIT}: _proc_arq_vlr_post_imei()
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_INIT}: proc_arq_fsm_done(PASSED)
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_INIT}: state_chg to PR_ARQ_S_DONE
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_DONE}: Process Access Request result: PASSED
+- sending CM Service Accept for MSISDN:46071
+DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
+DREF MSISDN:46071: MSC conn use + cm_service == 2 (0x9: compl_l3,cm_service)
+DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
+DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
+DREF VLR subscr MSISDN:46071 usage decreases to: 2
+DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
+DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Event SUBSCR_CONN_E_COMPLETE_LAYER_3 not permitted
+DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x8: cm_service)
+  cm_service_result_sent == 1
+msc_subscr_conn_is_accepted() == true
+  MSC <--RAN_GERAN_A-- MS: GSM0480_MTYPE_REGISTER
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
+DRLL Dispatching 04.08 message GSM0480_MTYPE_REGISTER (0xb:0x3b)
+DMM Received SS/USSD data (trans_id=8, msg_type=GSM0480_MTYPE_REGISTER)
+DMM  -> (new transaction)
+DCC (ti 08 sub MSISDN:46071 callref 20000001) New transaction
+DREF VLR subscr MSISDN:46071 usage increases to: 3
+DREF MSISDN:46071: MSC conn use + trans_nc_ss == 3 (0x4a: dtap,cm_service,trans_nc_ss)
+DMM MSISDN:46071: rx msg GSM0480_MTYPE_REGISTER: received_cm_service_request changes to false
+DREF MSISDN:46071: MSC conn use - cm_service == 2 (0x42: dtap,trans_nc_ss)
+DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
+DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
+DMM USSD: Own number requested
+DMM MSISDN:46071: MSISDN = 46071
+DMSC msc_tx 43 bytes to MSISDN:46071 via RAN_GERAN_A
+- DTAP --RAN_GERAN_A--> MS: GSM0480_MTYPE_RELEASE_COMPLETE: 8b2a1c27a225020101302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
+- DTAP matches expected message
+DREF VLR subscr MSISDN:46071 usage decreases to: 2
+DREF MSISDN:46071: MSC conn use - trans_nc_ss == 1 (0x2: dtap)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
+DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
+DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
+DREF VLR subscr MSISDN:46071 usage increases to: 3
+DREF VLR subscr MSISDN:46071 usage decreases to: 2
+- BSSAP Clear --RAN_GERAN_A--> MS
+  dtap_tx_confirmed == 1
+  bssap_clear_sent == 1
+- all requests serviced, conn has been released
+- BSS sends BSSMAP Clear Complete
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
+DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
+DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
+DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_DONE}: Removing from parent Subscr_Conn(CM_SERVICE_REQ:901700000004620)
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_DONE}: Freeing instance
+DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_DONE}: Deallocated
+DRLL MSISDN:46071: Freeing subscriber connection
+DREF VLR subscr MSISDN:46071 usage decreases to: 1
+DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASED}: Freeing instance
+DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASED}: Deallocated
+  llist_count(&net->subscr_conns) == 0
+DREF freeing VLR subscr MSISDN:46071
+===== test_ss_ussd_geran: SUCCESS
+
+full talloc report on 'msgb' (total      0 bytes in   1 blocks)
+talloc_total_blocks(tall_bsc_ctx) == 12
+
+full talloc report on 'msgb' (total      0 bytes in   1 blocks)
+talloc_total_blocks(tall_bsc_ctx) == 12
+