osmith has uploaded this change for review. ( https://gerrit.osmocom.org/12478


Change subject: VLR: send CHECK-IMEI to EIR/HLR
......................................................................

VLR: send CHECK-IMEI to EIR/HLR

When check-imei-req is enabled in the VTY config, do not accept IMEIs
sent by the ME directly anymore. Send the IMEI to the EIR/HLR and wait
for its ACK or NACK.

OsmoHLR also accepts all IMEIs at this point, but this allows to
optionally store the IMEI in the HLR DB.

Depends: Ib240474b0c3c603ba840cf26babb38a44dfc9364 (osmo-hlr)
Related: OS#3733
Change-Id: Ife868ed71c36cdd02638072abebf61fc949080a7
---
M include/osmocom/msc/vlr.h
M src/libvlr/vlr.c
M src/libvlr/vlr_core.h
M src/libvlr/vlr_lu_fsm.c
M tests/msc_vlr/msc_vlr_test_gsm_authen.c
M tests/msc_vlr/msc_vlr_test_gsm_authen.err
M tests/msc_vlr/msc_vlr_test_gsm_ciph.c
M tests/msc_vlr/msc_vlr_test_gsm_ciph.err
M tests/msc_vlr/msc_vlr_test_no_authen.c
M tests/msc_vlr/msc_vlr_test_no_authen.err
10 files changed, 245 insertions(+), 53 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-msc refs/changes/78/12478/1

diff --git a/include/osmocom/msc/vlr.h b/include/osmocom/msc/vlr.h
index 029ef31..bf2f9fc 100644
--- a/include/osmocom/msc/vlr.h
+++ b/include/osmocom/msc/vlr.h
@@ -65,6 +65,8 @@
        VLR_ULA_E_ID_IMSI,      /* IMSI recieved from MS */
        VLR_ULA_E_ID_IMEI,      /* IMEI received from MS */
        VLR_ULA_E_ID_IMEISV,    /* IMEISV received from MS */
+       VLR_ULA_E_HLR_IMEI_ACK, /* Check_IMEI_VLR result from HLR */
+       VLR_ULA_E_HLR_IMEI_NACK,/* Check_IMEI_VLR result from HLR */
        VLR_ULA_E_HLR_LU_RES,   /* HLR UpdateLocation result */
        VLR_ULA_E_UPD_HLR_COMPL,/* UpdatE_HLR_VLR result */
        VLR_ULA_E_LU_COMPL_SUCCESS,/* Location_Update_Completion_VLR result */
diff --git a/src/libvlr/vlr.c b/src/libvlr/vlr.c
index 7de78bf..ac340d1 100644
--- a/src/libvlr/vlr.c
+++ b/src/libvlr/vlr.c
@@ -642,6 +642,32 @@
        return vlr_subscr_tx_gsup_message(vsub, &gsup_msg);
 }

+/* Initiate Check_IMEI_VLR Procedure (23.018 Chapter 7.1.2.9).
+ * Send the IMEI and wait for ACK. Usually the EIR receives and answers this 
and checks the device
+ * against a white/grey/blacklist. As of writing, there is no EIR in the 
Osmocom stack, but HLR
+ * handles the request instead and always replies with ACK. It is 
theoretically able to save the
+ * IMEI to the HLR DB as side effect (OS#2541). */
+int vlr_subscr_tx_req_check_imei(const struct vlr_subscr *vsub)
+{
+       struct osmo_gsup_message gsup_msg = {0};
+       uint8_t imei_enc[GSM23003_IMEI_NUM_DIGITS+2] = {0};
+       int len;
+
+       /* Encode IMEI */
+       len = gsm48_encode_bcd_number(imei_enc, sizeof(imei_enc), 0, 
vsub->imei);
+       if (len < 1) {
+               LOGVSUBP(LOGL_ERROR, vsub, "Error: cannot encode IMEI '%s'\n", 
vsub->imei);
+               return -ENOSPC;
+       }
+       gsup_msg.imei_enc = imei_enc;
+       gsup_msg.imei_enc_len = len;
+
+       /* Send CHECK_IMEI_REQUEST */
+       gsup_msg.message_type = OSMO_GSUP_MSGT_CHECK_IMEI_REQUEST;
+       OSMO_STRLCPY_ARRAY(gsup_msg.imsi, vsub->imsi);
+       return vlr_tx_gsup_message(vsub->vlr, &gsup_msg);
+}
+
 /* Tell HLR that authentication failure occurred */
 int vlr_subscr_tx_auth_fail_rep(const struct vlr_subscr *vsub)
 {
@@ -976,6 +1002,39 @@
        return rc;
 }

+/* Handle Check_IMEI_VLR error from HLR */
+static int vlr_subscr_handle_check_imei_err(struct vlr_subscr *vsub,
+                                           const struct osmo_gsup_message 
*gsup)
+{
+       if (!vsub->lu_fsm) {
+               LOGVSUBP(LOGL_ERROR, vsub, "Rx GSUP Check_IMEI_VLR error 
without LU in progress\n");
+               return -ENODEV;
+       }
+
+       LOGVSUBP(LOGL_DEBUG, vsub, "Check_IMEI_VLR failed; gmm_cause: %s\n",
+                get_value_string(gsm48_gmm_cause_names, gsup->cause));
+
+       osmo_fsm_inst_dispatch(vsub->lu_fsm, VLR_ULA_E_LU_COMPL_FAILURE, (void 
*)&gsup->cause);
+       return 0;
+}
+
+/* Handle Check_IMEI_VLR result from HLR */
+static int vlr_subscr_handle_check_imei_res(struct vlr_subscr *vsub,
+                                           const struct osmo_gsup_message 
*gsup)
+{
+       if (!vsub->lu_fsm) {
+               LOGVSUBP(LOGL_ERROR, vsub, "Rx GSUP Check_IMEI_VLR result 
without LU in progress\n");
+               return -ENODEV;
+       }
+
+       if (gsup->imei_result == OSMO_GSUP_IMEI_RESULT_ACK)
+               osmo_fsm_inst_dispatch(vsub->lu_fsm, VLR_ULA_E_HLR_IMEI_ACK, 
(void *)&gsup->cause);
+       else
+               osmo_fsm_inst_dispatch(vsub->lu_fsm, VLR_ULA_E_HLR_IMEI_NACK, 
(void *)&gsup->cause);
+
+       return 0;
+}
+
 /* Incoming handler for GSUP from HLR.
  * Keep this function non-static for direct invocation by unit tests. */
 int vlr_gsupc_read_cb(struct osmo_gsup_client *gsupc, struct msgb *msg)
@@ -1045,6 +1104,12 @@
                        gsup.message_type);
                rc = -GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL;
                break;
+       case OSMO_GSUP_MSGT_CHECK_IMEI_ERROR:
+               rc = vlr_subscr_handle_check_imei_err(vsub, &gsup);
+               break;
+       case OSMO_GSUP_MSGT_CHECK_IMEI_RESULT:
+               rc = vlr_subscr_handle_check_imei_res(vsub, &gsup);
+               break;
        default:
                /* Forward message towards MSC */
                rc = vlr->ops.forward_gsup_msg(vsub, &gsup);
diff --git a/src/libvlr/vlr_core.h b/src/libvlr/vlr_core.h
index d336b1b..b28a40a 100644
--- a/src/libvlr/vlr_core.h
+++ b/src/libvlr/vlr_core.h
@@ -8,6 +8,7 @@
 int vlr_subscr_req_lu(struct vlr_subscr *vsub) 
__attribute__((warn_unused_result));
 int vlr_subscr_req_sai(struct vlr_subscr *vsub, const uint8_t *auts,
                       const uint8_t *auts_rand) 
__attribute__((warn_unused_result));
+int vlr_subscr_tx_req_check_imei(const struct vlr_subscr *vsub);
 struct vlr_subscr *vlr_subscr_alloc(struct vlr_instance *vlr);
 void vlr_subscr_update_tuples(struct vlr_subscr *vsub,
                              const struct osmo_gsup_message *gsup);
diff --git a/src/libvlr/vlr_lu_fsm.c b/src/libvlr/vlr_lu_fsm.c
index b00f8ce..6791f34 100644
--- a/src/libvlr/vlr_lu_fsm.c
+++ b/src/libvlr/vlr_lu_fsm.c
@@ -652,6 +652,8 @@
        OSMO_VALUE_STRING(VLR_ULA_E_ID_IMSI),
        OSMO_VALUE_STRING(VLR_ULA_E_ID_IMEI),
        OSMO_VALUE_STRING(VLR_ULA_E_ID_IMEISV),
+       OSMO_VALUE_STRING(VLR_ULA_E_HLR_IMEI_ACK),
+       OSMO_VALUE_STRING(VLR_ULA_E_HLR_IMEI_NACK),
        OSMO_VALUE_STRING(VLR_ULA_E_HLR_LU_RES),
        OSMO_VALUE_STRING(VLR_ULA_E_UPD_HLR_COMPL),
        OSMO_VALUE_STRING(VLR_ULA_E_LU_COMPL_SUCCESS),
@@ -1228,9 +1230,17 @@
                                       LU_COMPL_VLR_E_NEW_TMSI_ACK, NULL);
                break;
        case VLR_ULA_E_ID_IMEI:
+               /* Got the IMEI from ME, now send it to HLR */
+               vlr_subscr_tx_req_check_imei(lfp->vsub);
+               break;
+       case VLR_ULA_E_HLR_IMEI_ACK:
                osmo_fsm_inst_dispatch(lfp->lu_compl_vlr_fsm,
                                       LU_COMPL_VLR_E_IMEI_CHECK_ACK, NULL);
                break;
+       case VLR_ULA_E_HLR_IMEI_NACK:
+               osmo_fsm_inst_dispatch(lfp->lu_compl_vlr_fsm,
+                                      LU_COMPL_VLR_E_IMEI_CHECK_NACK, NULL);
+               break;
        case VLR_ULA_E_LU_COMPL_SUCCESS:
                lu_fsm_discard_lu_compl_fsm(fi);

@@ -1361,7 +1371,9 @@
                                 S(VLR_ULA_E_LU_COMPL_FAILURE) |
                                 S(VLR_ULA_E_NEW_TMSI_ACK) |
                                 S(VLR_ULA_E_ID_IMEI) |
-                                S(VLR_ULA_E_ID_IMEISV),
+                                S(VLR_ULA_E_ID_IMEISV) |
+                                S(VLR_ULA_E_HLR_IMEI_ACK) |
+                                S(VLR_ULA_E_HLR_IMEI_NACK),
                .out_state_mask = S(VLR_ULA_S_DONE),
                .name = OSMO_STRINGIFY(VLR_ULA_S_WAIT_LU_COMPL),
                .action = lu_fsm_wait_lu_compl,
diff --git a/tests/msc_vlr/msc_vlr_test_gsm_authen.c 
b/tests/msc_vlr/msc_vlr_test_gsm_authen.c
index 46dd9a1..4174fe2 100644
--- a/tests/msc_vlr/msc_vlr_test_gsm_authen.c
+++ b/tests/msc_vlr/msc_vlr_test_gsm_authen.c
@@ -573,9 +573,13 @@
        EXPECT_ACCEPTED(false);
        thwart_rx_non_initial_requests();

-       btw("MS replies with an Identity Response");
-       expect_bssap_clear();
+       btw("MS replies with an Identity Response, VLR sends the IMEI to HLR");
+       gsup_expect_tx("30010809710000004026f050090824433224433224f0");
        ms_sends_msg("0559084a32244332244302");
+
+       btw("HLR accepts the IMEI");
+       expect_bssap_clear();
+       gsup_rx("32010809710000004026f0510100", NULL);
        VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");

        btw("LU was successful, and the conn has already been closed");
@@ -676,9 +680,13 @@
        EXPECT_ACCEPTED(false);
        thwart_rx_non_initial_requests();

-       btw("MS replies with an Identity Response");
+       btw("MS replies with an Identity Response, VLR sends the IMEI to HLR");
+       gsup_expect_tx("30010809710000004026f050090824433224433224f0");
        ms_sends_msg("0559084a32244332244302");

+       btw("HLR accepts the IMEI");
+       gsup_rx("32010809710000004026f0510100", NULL);
+
        btw("a LU Accept with a new TMSI was sent, waiting for TMSI Realloc 
Compl");
        EXPECT_CONN_COUNT(1);
        VERBOSE_ASSERT(lu_result_sent, == RES_ACCEPT, "%d");
diff --git a/tests/msc_vlr/msc_vlr_test_gsm_authen.err 
b/tests/msc_vlr/msc_vlr_test_gsm_authen.err
index e834e91..f2462f1 100644
--- a/tests/msc_vlr/msc_vlr_test_gsm_authen.err
+++ b/tests/msc_vlr/msc_vlr_test_gsm_authen.err
@@ -1234,16 +1234,26 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: 
GSM48_MT_RR_SYSINFO_1
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
-- MS replies with an Identity Response
+- MS replies with an Identity Response, VLR sends the IMEI to HLR
   MSC <--GERAN-A-- MS: GSM48_MT_MM_ID_RESP
 DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423420
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423420
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event 
VLR_ULA_E_ID_IMEI
+DVLR GSUP tx: 30010809710000004026f050090824433224433224f0
+GSUP --> HLR: OSMO_GSUP_MSGT_CHECK_IMEI_REQUEST: 
30010809710000004026f050090824433224433224f0
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
+DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Received Event 
RAN_CONN_E_UNUSED
+DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Awaiting results for 
Auth+Ciph, overruling event RAN_CONN_E_UNUSED
+- HLR accepts the IMEI
+<-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: 32010809710000004026f0510100
+DVLR GSUP rx 14: 32010809710000004026f0510100
+DREF VLR subscr MSISDN:46071 usage increases to: 2
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event 
VLR_ULA_E_HLR_IMEI_ACK
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI}: Received 
Event LU_COMPL_VLR_E_IMEI_CHECK_ACK
 - sending LU Accept for MSISDN:46071
-DREF VLR subscr MSISDN:46071 usage increases to: 2
+DREF VLR subscr MSISDN:46071 usage increases to: 3
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI}: 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)
@@ -1255,11 +1265,12 @@
 DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: state_chg to 
RAN_CONN_S_ACCEPTED
 DMM RAN_conn(LU:901700000004620){RAN_CONN_S_ACCEPTED}: Received Event 
RAN_CONN_E_UNUSED
 DMM RAN_conn(LU:901700000004620){RAN_CONN_S_ACCEPTED}: state_chg to 
RAN_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
-DREF VLR subscr MSISDN:46071 usage increases to: 3
-DREF VLR subscr MSISDN:46071 usage decreases to: 2
+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 --GERAN-A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
+DREF VLR subscr MSISDN:46071 usage decreases to: 2
+<-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: vlr_gsupc_read_cb() returns 0
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
@@ -1463,20 +1474,29 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: 
GSM48_MT_RR_SYSINFO_1
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
-- MS replies with an Identity Response
+- MS replies with an Identity Response, VLR sends the IMEI to HLR
   MSC <--GERAN-A-- MS: GSM48_MT_MM_ID_RESP
 DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423420
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423420
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event 
VLR_ULA_E_ID_IMEI
+DVLR GSUP tx: 30010809710000004026f050090824433224433224f0
+GSUP --> HLR: OSMO_GSUP_MSGT_CHECK_IMEI_REQUEST: 
30010809710000004026f050090824433224433224f0
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
+DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Received Event 
RAN_CONN_E_UNUSED
+DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Awaiting results for 
Auth+Ciph, overruling event RAN_CONN_E_UNUSED
+- HLR accepts the IMEI
+<-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: 32010809710000004026f0510100
+DVLR GSUP rx 14: 32010809710000004026f0510100
+DREF VLR subscr MSISDN:46071 usage increases to: 2
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event 
VLR_ULA_E_HLR_IMEI_ACK
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: 
Received Event LU_COMPL_VLR_E_IMEI_CHECK_ACK
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: 
lu_compl_vlr_new_tmsi()
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: 
state_chg to LU_COMPL_VLR_S_WAIT_TMSI_CNF
 - sending LU Accept for MSISDN:46071, with TMSI 0x03020100
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
-DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Received Event 
RAN_CONN_E_UNUSED
-DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Awaiting results for 
Auth+Ciph, overruling event RAN_CONN_E_UNUSED
+DREF VLR subscr MSISDN:46071 usage decreases to: 1
+<-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: vlr_gsupc_read_cb() returns 0
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
   llist_count(&net->ran_conns) == 1
   lu_result_sent == 1
diff --git a/tests/msc_vlr/msc_vlr_test_gsm_ciph.c 
b/tests/msc_vlr/msc_vlr_test_gsm_ciph.c
index a641ec2..b7543da 100644
--- a/tests/msc_vlr/msc_vlr_test_gsm_ciph.c
+++ b/tests/msc_vlr/msc_vlr_test_gsm_ciph.c
@@ -553,9 +553,13 @@
        EXPECT_ACCEPTED(false);
        thwart_rx_non_initial_requests();

-       btw("MS replies with an Identity Response");
-       expect_bssap_clear();
+       btw("MS replies with an Identity Response, VLR sends the IMEI to HLR");
+       gsup_expect_tx("30010809710000004026f050090824433224433224f0");
        ms_sends_msg("0559084a32244332244302");
+
+       btw("HLR accepts the IMEI");
+       expect_bssap_clear();
+       gsup_rx("32010809710000004026f0510100", NULL);
        VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");

        btw("LU was successful, and the conn has already been closed");
@@ -758,9 +762,13 @@
        EXPECT_ACCEPTED(false);
        thwart_rx_non_initial_requests();

-       btw("MS replies with an Identity Response");
+       btw("MS replies with an Identity Response, VLR sends the IMEI to HLR");
+       gsup_expect_tx("30010809710000004026f050090824433224433224f0");
        ms_sends_msg("0559084a32244332244302");

+       btw("HLR accepts the IMEI");
+       gsup_rx("32010809710000004026f0510100", NULL);
+
        btw("a LU Accept with a new TMSI was sent, waiting for TMSI Realloc 
Compl");
        EXPECT_CONN_COUNT(1);
        VERBOSE_ASSERT(lu_result_sent, == RES_ACCEPT, "%d");
diff --git a/tests/msc_vlr/msc_vlr_test_gsm_ciph.err 
b/tests/msc_vlr/msc_vlr_test_gsm_ciph.err
index 69ad9a2..70663bc 100644
--- a/tests/msc_vlr/msc_vlr_test_gsm_ciph.err
+++ b/tests/msc_vlr/msc_vlr_test_gsm_ciph.err
@@ -1178,16 +1178,26 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: 
GSM48_MT_RR_SYSINFO_1
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
-- MS replies with an Identity Response
+- MS replies with an Identity Response, VLR sends the IMEI to HLR
   MSC <--GERAN-A-- MS: GSM48_MT_MM_ID_RESP
 DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423420
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423420
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event 
VLR_ULA_E_ID_IMEI
+DVLR GSUP tx: 30010809710000004026f050090824433224433224f0
+GSUP --> HLR: OSMO_GSUP_MSGT_CHECK_IMEI_REQUEST: 
30010809710000004026f050090824433224433224f0
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
+DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Received Event 
RAN_CONN_E_UNUSED
+DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Awaiting results for 
Auth+Ciph, overruling event RAN_CONN_E_UNUSED
+- HLR accepts the IMEI
+<-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: 32010809710000004026f0510100
+DVLR GSUP rx 14: 32010809710000004026f0510100
+DREF VLR subscr MSISDN:46071 usage increases to: 2
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event 
VLR_ULA_E_HLR_IMEI_ACK
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI}: Received 
Event LU_COMPL_VLR_E_IMEI_CHECK_ACK
 - sending LU Accept for MSISDN:46071
-DREF VLR subscr MSISDN:46071 usage increases to: 2
+DREF VLR subscr MSISDN:46071 usage increases to: 3
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI}: 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)
@@ -1199,11 +1209,12 @@
 DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: state_chg to 
RAN_CONN_S_ACCEPTED
 DMM RAN_conn(LU:901700000004620){RAN_CONN_S_ACCEPTED}: Received Event 
RAN_CONN_E_UNUSED
 DMM RAN_conn(LU:901700000004620){RAN_CONN_S_ACCEPTED}: state_chg to 
RAN_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
-DREF VLR subscr MSISDN:46071 usage increases to: 3
-DREF VLR subscr MSISDN:46071 usage decreases to: 2
+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 --GERAN-A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
+DREF VLR subscr MSISDN:46071 usage decreases to: 2
+<-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: vlr_gsupc_read_cb() returns 0
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
@@ -1633,20 +1644,29 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: 
GSM48_MT_RR_SYSINFO_1
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
-- MS replies with an Identity Response
+- MS replies with an Identity Response, VLR sends the IMEI to HLR
   MSC <--GERAN-A-- MS: GSM48_MT_MM_ID_RESP
 DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423420
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423420
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event 
VLR_ULA_E_ID_IMEI
+DVLR GSUP tx: 30010809710000004026f050090824433224433224f0
+GSUP --> HLR: OSMO_GSUP_MSGT_CHECK_IMEI_REQUEST: 
30010809710000004026f050090824433224433224f0
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
+DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Received Event 
RAN_CONN_E_UNUSED
+DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Awaiting results for 
Auth+Ciph, overruling event RAN_CONN_E_UNUSED
+- HLR accepts the IMEI
+<-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: 32010809710000004026f0510100
+DVLR GSUP rx 14: 32010809710000004026f0510100
+DREF VLR subscr MSISDN:46071 usage increases to: 2
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event 
VLR_ULA_E_HLR_IMEI_ACK
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: 
Received Event LU_COMPL_VLR_E_IMEI_CHECK_ACK
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: 
lu_compl_vlr_new_tmsi()
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: 
state_chg to LU_COMPL_VLR_S_WAIT_TMSI_CNF
 - sending LU Accept for MSISDN:46071, with TMSI 0x03020100
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
-DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Received Event 
RAN_CONN_E_UNUSED
-DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Awaiting results for 
Auth+Ciph, overruling event RAN_CONN_E_UNUSED
+DREF VLR subscr MSISDN:46071 usage decreases to: 1
+<-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: vlr_gsupc_read_cb() returns 0
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
   llist_count(&net->ran_conns) == 1
   lu_result_sent == 1
diff --git a/tests/msc_vlr/msc_vlr_test_no_authen.c 
b/tests/msc_vlr/msc_vlr_test_no_authen.c
index 3162149..d52d3d6 100644
--- a/tests/msc_vlr/msc_vlr_test_no_authen.c
+++ b/tests/msc_vlr/msc_vlr_test_no_authen.c
@@ -428,11 +428,15 @@
        EXPECT_ACCEPTED(false);
        thwart_rx_non_initial_requests();

-       btw("MS replies with an Identity Response");
-       expect_bssap_clear();
+       btw("MS replies with an Identity Response, VLR sends the IMEI to HLR");
+       gsup_expect_tx("30010809710000004026f050090824433224433224f0");
        /* 3GPP TS 23.003: 6.2.1 Composition of IMEI: the IMEI ends with a
         * spare digit that shall be sent as zero by the MS. */
        ms_sends_msg("0559084a32244332244302");
+
+       btw("HLR accepts the IMEI");
+       expect_bssap_clear();
+       gsup_rx("32010809710000004026f0510100", NULL);
        VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");

        btw("LU was successful, and the conn has already been closed");
@@ -499,9 +503,13 @@
        EXPECT_ACCEPTED(false);
        thwart_rx_non_initial_requests();

-       btw("MS replies with an Identity Response");
+       btw("MS replies with an Identity Response, VLR sends the IMEI to HLR");
+       gsup_expect_tx("30010809710000004026f050090824433224433224f0");
        ms_sends_msg("0559084a32244332244302");

+       btw("HLR accepts the IMEI");
+       gsup_rx("32010809710000004026f0510100", NULL);
+
        btw("a LU Accept with a new TMSI was sent, waiting for TMSI Realloc 
Compl");
        EXPECT_CONN_COUNT(1);
        VERBOSE_ASSERT(lu_result_sent, == RES_ACCEPT, "%d");
@@ -652,9 +660,13 @@
        EXPECT_ACCEPTED(false);
        thwart_rx_non_initial_requests();

-       btw("MS replies with an Identity Response");
-       expect_bssap_clear();
+       btw("MS replies with an Identity Response, VLR sends the IMEI to HLR");
+       gsup_expect_tx("30010809710000004026f050090824433224433224f0");
        ms_sends_msg("0559084a32244332244302");
+
+       btw("HLR accepts the IMEI");
+       expect_bssap_clear();
+       gsup_rx("32010809710000004026f0510100", NULL);
        VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");

        btw("LU was successful, and the conn has already been closed");
@@ -874,9 +886,13 @@
        EXPECT_ACCEPTED(false);
        thwart_rx_non_initial_requests();

-       btw("MS replies with an Identity Response");
+       btw("MS replies with an Identity Response, VLR sends the IMEI to HLR");
+       gsup_expect_tx("30010809710000004026f050090824433224433224f0");
        ms_sends_msg("0559084a32244332244302");

+       btw("HLR accepts the IMEI");
+       gsup_rx("32010809710000004026f0510100", NULL);
+
        btw("a LU Accept with a new TMSI was sent, waiting for TMSI Realloc 
Compl");
        EXPECT_CONN_COUNT(1);
        VERBOSE_ASSERT(lu_result_sent, == RES_ACCEPT, "%d");
diff --git a/tests/msc_vlr/msc_vlr_test_no_authen.err 
b/tests/msc_vlr/msc_vlr_test_no_authen.err
index f865d87..7d00eff 100644
--- a/tests/msc_vlr/msc_vlr_test_no_authen.err
+++ b/tests/msc_vlr/msc_vlr_test_no_authen.err
@@ -913,16 +913,26 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: 
GSM48_MT_RR_SYSINFO_1
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
-- MS replies with an Identity Response
+- MS replies with an Identity Response, VLR sends the IMEI to HLR
   MSC <--GERAN-A-- MS: GSM48_MT_MM_ID_RESP
 DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423420
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423420
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event 
VLR_ULA_E_ID_IMEI
+DVLR GSUP tx: 30010809710000004026f050090824433224433224f0
+GSUP --> HLR: OSMO_GSUP_MSGT_CHECK_IMEI_REQUEST: 
30010809710000004026f050090824433224433224f0
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
+DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Received Event 
RAN_CONN_E_UNUSED
+DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Awaiting results for 
Auth+Ciph, overruling event RAN_CONN_E_UNUSED
+- HLR accepts the IMEI
+<-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: 32010809710000004026f0510100
+DVLR GSUP rx 14: 32010809710000004026f0510100
+DREF VLR subscr MSISDN:46071 usage increases to: 2
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event 
VLR_ULA_E_HLR_IMEI_ACK
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI}: Received 
Event LU_COMPL_VLR_E_IMEI_CHECK_ACK
 - sending LU Accept for MSISDN:46071
-DREF VLR subscr MSISDN:46071 usage increases to: 2
+DREF VLR subscr MSISDN:46071 usage increases to: 3
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI}: 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)
@@ -934,11 +944,12 @@
 DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: state_chg to 
RAN_CONN_S_ACCEPTED
 DMM RAN_conn(LU:901700000004620){RAN_CONN_S_ACCEPTED}: Received Event 
RAN_CONN_E_UNUSED
 DMM RAN_conn(LU:901700000004620){RAN_CONN_S_ACCEPTED}: state_chg to 
RAN_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
-DREF VLR subscr MSISDN:46071 usage increases to: 3
-DREF VLR subscr MSISDN:46071 usage decreases to: 2
+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 --GERAN-A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
+DREF VLR subscr MSISDN:46071 usage decreases to: 2
+<-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: vlr_gsupc_read_cb() returns 0
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
@@ -1094,20 +1105,29 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: 
GSM48_MT_RR_SYSINFO_1
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
-- MS replies with an Identity Response
+- MS replies with an Identity Response, VLR sends the IMEI to HLR
   MSC <--GERAN-A-- MS: GSM48_MT_MM_ID_RESP
 DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423420
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423420
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event 
VLR_ULA_E_ID_IMEI
+DVLR GSUP tx: 30010809710000004026f050090824433224433224f0
+GSUP --> HLR: OSMO_GSUP_MSGT_CHECK_IMEI_REQUEST: 
30010809710000004026f050090824433224433224f0
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
+DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Received Event 
RAN_CONN_E_UNUSED
+DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Awaiting results for 
Auth+Ciph, overruling event RAN_CONN_E_UNUSED
+- HLR accepts the IMEI
+<-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: 32010809710000004026f0510100
+DVLR GSUP rx 14: 32010809710000004026f0510100
+DREF VLR subscr MSISDN:46071 usage increases to: 2
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event 
VLR_ULA_E_HLR_IMEI_ACK
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: 
Received Event LU_COMPL_VLR_E_IMEI_CHECK_ACK
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: 
lu_compl_vlr_new_tmsi()
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: 
state_chg to LU_COMPL_VLR_S_WAIT_TMSI_CNF
 - sending LU Accept for MSISDN:46071, with TMSI 0x03020100
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
-DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Received Event 
RAN_CONN_E_UNUSED
-DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Awaiting results for 
Auth+Ciph, overruling event RAN_CONN_E_UNUSED
+DREF VLR subscr MSISDN:46071 usage decreases to: 1
+<-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: vlr_gsupc_read_cb() returns 0
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
   llist_count(&net->ran_conns) == 1
   lu_result_sent == 1
@@ -1486,16 +1506,26 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: 
GSM48_MT_RR_SYSINFO_1
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
-- MS replies with an Identity Response
+- MS replies with an Identity Response, VLR sends the IMEI to HLR
   MSC <--GERAN-A-- MS: GSM48_MT_MM_ID_RESP
 DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423420
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423420
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event 
VLR_ULA_E_ID_IMEI
+DVLR GSUP tx: 30010809710000004026f050090824433224433224f0
+GSUP --> HLR: OSMO_GSUP_MSGT_CHECK_IMEI_REQUEST: 
30010809710000004026f050090824433224433224f0
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
+DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Received Event 
RAN_CONN_E_UNUSED
+DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Awaiting results for 
Auth+Ciph, overruling event RAN_CONN_E_UNUSED
+- HLR accepts the IMEI
+<-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: 32010809710000004026f0510100
+DVLR GSUP rx 14: 32010809710000004026f0510100
+DREF VLR subscr MSISDN:46071 usage increases to: 2
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event 
VLR_ULA_E_HLR_IMEI_ACK
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI}: Received 
Event LU_COMPL_VLR_E_IMEI_CHECK_ACK
 - sending LU Accept for MSISDN:46071
-DREF VLR subscr MSISDN:46071 usage increases to: 2
+DREF VLR subscr MSISDN:46071 usage increases to: 3
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI}: 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)
@@ -1507,11 +1537,12 @@
 DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: state_chg to 
RAN_CONN_S_ACCEPTED
 DMM RAN_conn(LU:901700000004620){RAN_CONN_S_ACCEPTED}: Received Event 
RAN_CONN_E_UNUSED
 DMM RAN_conn(LU:901700000004620){RAN_CONN_S_ACCEPTED}: state_chg to 
RAN_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
-DREF VLR subscr MSISDN:46071 usage increases to: 3
-DREF VLR subscr MSISDN:46071 usage decreases to: 2
+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 --GERAN-A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
+DREF VLR subscr MSISDN:46071 usage decreases to: 2
+<-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: vlr_gsupc_read_cb() returns 0
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
@@ -2047,20 +2078,29 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: 
GSM48_MT_RR_SYSINFO_1
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
-- MS replies with an Identity Response
+- MS replies with an Identity Response, VLR sends the IMEI to HLR
   MSC <--GERAN-A-- MS: GSM48_MT_MM_ID_RESP
 DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423420
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423420
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event 
VLR_ULA_E_ID_IMEI
+DVLR GSUP tx: 30010809710000004026f050090824433224433224f0
+GSUP --> HLR: OSMO_GSUP_MSGT_CHECK_IMEI_REQUEST: 
30010809710000004026f050090824433224433224f0
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
+DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Received Event 
RAN_CONN_E_UNUSED
+DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Awaiting results for 
Auth+Ciph, overruling event RAN_CONN_E_UNUSED
+- HLR accepts the IMEI
+<-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: 32010809710000004026f0510100
+DVLR GSUP rx 14: 32010809710000004026f0510100
+DREF VLR subscr MSISDN:46071 usage increases to: 2
+DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event 
VLR_ULA_E_HLR_IMEI_ACK
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: 
Received Event LU_COMPL_VLR_E_IMEI_CHECK_ACK
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: 
lu_compl_vlr_new_tmsi()
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: 
state_chg to LU_COMPL_VLR_S_WAIT_TMSI_CNF
 - sending LU Accept for MSISDN:46071, with TMSI 0x03020100
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
-DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Received Event 
RAN_CONN_E_UNUSED
-DMM RAN_conn(LU:901700000004620){RAN_CONN_S_AUTH_CIPH}: Awaiting results for 
Auth+Ciph, overruling event RAN_CONN_E_UNUSED
+DREF VLR subscr MSISDN:46071 usage decreases to: 1
+<-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: vlr_gsupc_read_cb() returns 0
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
   llist_count(&net->ran_conns) == 1
   lu_result_sent == 1

--
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Gerrit-Project: osmo-msc
Gerrit-Branch: master
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Gerrit-Change-Id: Ife868ed71c36cdd02638072abebf61fc949080a7
Gerrit-Change-Number: 12478
Gerrit-PatchSet: 1
Gerrit-Owner: osmith <[email protected]>

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