libmsc/ussd.c: use connection ref-counting and transactions
A subscriber may have a few active transactions at the same time.
For example, one can receive SMS messages during a call, or during
an active SS/USSD session.
We already have connection ref-counting and transactions for CC
and SMS, so let's also use both for SS/USSD.
Change-Id: I21c6777cb88f1f4f80f75dcd39734e952bd4e8b0
diff --git a/tests/msc_vlr/msc_vlr_test_umts_authen.err b/tests/msc_vlr/msc_vlr_test_umts_authen.err
index c7be31c..fcaaa97 100644
--- a/tests/msc_vlr/msc_vlr_test_umts_authen.err
+++ b/tests/msc_vlr/msc_vlr_test_umts_authen.err
@@ -265,8 +265,13 @@
MSC <--RAN_GERAN_A-- MS: GSM0480_MTYPE_REGISTER
DREF MSISDN:42342: 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:42342 callref 20000001) New transaction
+DREF VLR subscr MSISDN:42342 usage increases to: 3
+DREF MSISDN:42342: MSC conn use + trans_nc_ss == 3 (0x4a: dtap,cm_service,trans_nc_ss)
DMM MSISDN:42342: rx msg GSM0480_MTYPE_REGISTER: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
+DREF MSISDN:42342: MSC conn use - cm_service == 2 (0x42: dtap,trans_nc_ss)
DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
DMM USSD: Own number requested
@@ -274,6 +279,8 @@
DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
- DTAP --RAN_GERAN_A--> MS: GSM0480_MTYPE_RELEASE_COMPLETE: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
- DTAP matches expected message
+DREF VLR subscr MSISDN:42342 usage decreases to: 2
+DREF MSISDN:42342: MSC conn use - trans_nc_ss == 1 (0x2: dtap)
DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
@@ -769,8 +776,13 @@
MSC <--RAN_UTRAN_IU-- MS: GSM0480_MTYPE_REGISTER
DREF MSISDN:42342: 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:42342 callref 20000002) New transaction
+DREF VLR subscr MSISDN:42342 usage increases to: 3
+DREF MSISDN:42342: MSC conn use + trans_nc_ss == 3 (0x4a: dtap,cm_service,trans_nc_ss)
DMM MSISDN:42342: rx msg GSM0480_MTYPE_REGISTER: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
+DREF MSISDN:42342: MSC conn use - cm_service == 2 (0x42: dtap,trans_nc_ss)
DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
DMM USSD: Own number requested
@@ -778,6 +790,8 @@
DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_UTRAN_IU
- DTAP --RAN_UTRAN_IU--> MS: GSM0480_MTYPE_RELEASE_COMPLETE: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
- DTAP matches expected message
+DREF VLR subscr MSISDN:42342 usage decreases to: 2
+DREF MSISDN:42342: MSC conn use - trans_nc_ss == 1 (0x2: dtap)
DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING