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authorNeels Hofmeyr <neels@hofmeyr.de>2017-12-15 03:02:27 +0100
committerNeels Hofmeyr <neels@hofmeyr.de>2017-12-20 23:07:10 +0100
commit2ff5bcdc387a7eb5135e5a54d55027502952c86b (patch)
tree602296791799e12d7f1aab0f635694d211c69ac8
parentc1d69256f61e6bc7bdcbbd1b4df6a779c7883891 (diff)
fix paging: add timeout to discard unsuccessful paging
Currently, if there is no reply from the BSS / RNC, a subscriber will remain as "already paged" forever, and is never going to be paged again. Even on IMSI Detach, the pending request will keep a ref count on the vlr_subscr. Add a paging timeout, as gsm_network->paging_timeout and in the VTY on the 'msc' node as 'paging timeout (default|<1-65535>'. (There is a 'network' / 'T3113' in OsmoBSC, but to not confuse the two, give this a different name.) Add test_ms_timeout_paging() test to verify the timeout works. I hit this while testing Paging across multiple hNodeB, when a UE lost connection to the hNodeB. I noticed that no matter how long I wait, no Paging is sent out anymore, and found this embarrassing issue. Good grief... The choice of 10 seconds is taken from https://osmocom.org/issues/2756 Change-Id: I2db6f1e2ad341cf9c2cc7a21ec2fca0bae5b2db5
-rw-r--r--include/osmocom/msc/gsm_data.h2
-rw-r--r--include/osmocom/msc/vlr.h1
-rw-r--r--src/libcommon-cs/common_cs.c2
-rw-r--r--src/libmsc/gsm_subscriber.c14
-rw-r--r--src/libmsc/msc_vty.c20
-rw-r--r--tests/msc_vlr/msc_vlr_test_ms_timeout.c93
-rw-r--r--tests/msc_vlr/msc_vlr_test_ms_timeout.err167
7 files changed, 298 insertions, 1 deletions
diff --git a/include/osmocom/msc/gsm_data.h b/include/osmocom/msc/gsm_data.h
index 6349fe0d3..1b0bff9df 100644
--- a/include/osmocom/msc/gsm_data.h
+++ b/include/osmocom/msc/gsm_data.h
@@ -344,6 +344,7 @@ enum gsm_auth_policy {
GSM_AUTH_POLICY_REGEXP, /* accept IMSIs matching given regexp */
};
+#define MSC_PAGING_RESPONSE_TIMER_DEFAULT 10
struct gsm_tz {
int override; /* if 0, use system's time zone instead. */
@@ -408,6 +409,7 @@ struct gsm_network {
unsigned int num_bts;
struct llist_head bts_list;
+ unsigned int paging_response_timer;
/* timer to expire old location updates */
struct osmo_timer_list subscr_expire_timer;
diff --git a/include/osmocom/msc/vlr.h b/include/osmocom/msc/vlr.h
index b6256086c..1b365a944 100644
--- a/include/osmocom/msc/vlr.h
+++ b/include/osmocom/msc/vlr.h
@@ -157,6 +157,7 @@ struct vlr_subscr {
struct {
/* pending requests */
bool is_paging;
+ struct osmo_timer_list paging_response_timer;
/* list of struct subscr_request */
struct llist_head requests;
uint8_t lac;
diff --git a/src/libcommon-cs/common_cs.c b/src/libcommon-cs/common_cs.c
index bad826264..474886511 100644
--- a/src/libcommon-cs/common_cs.c
+++ b/src/libcommon-cs/common_cs.c
@@ -60,6 +60,8 @@ struct gsm_network *gsm_network_init(void *ctx,
/* Use 30 min periodic update interval as sane default */
net->t3212 = 5;
+ net->paging_response_timer = MSC_PAGING_RESPONSE_TIMER_DEFAULT;
+
INIT_LLIST_HEAD(&net->trans_list);
INIT_LLIST_HEAD(&net->upqueue);
INIT_LLIST_HEAD(&net->subscr_conns);
diff --git a/src/libmsc/gsm_subscriber.c b/src/libmsc/gsm_subscriber.c
index a013e0eb6..b3d38d1e8 100644
--- a/src/libmsc/gsm_subscriber.c
+++ b/src/libmsc/gsm_subscriber.c
@@ -76,7 +76,10 @@ int subscr_paging_dispatch(unsigned int hooknum, unsigned int event,
return -EINVAL;
}
- if (event == GSM_PAGING_SUCCEEDED)
+ osmo_timer_del(&vsub->cs.paging_response_timer);
+
+ if (event == GSM_PAGING_SUCCEEDED
+ || event == GSM_PAGING_EXPIRED)
msc_stop_paging(vsub);
/* Inform parts of the system we don't know */
@@ -126,6 +129,12 @@ int msc_paging_request(struct vlr_subscr *vsub)
return -EINVAL;
}
+static void paging_response_timer_cb(void *data)
+{
+ struct vlr_subscr *vsub = data;
+ subscr_paging_dispatch(GSM_HOOK_RR_PAGING, GSM_PAGING_EXPIRED, NULL, NULL, vsub);
+}
+
/*! \brief Start a paging request for vsub, call cbfn(param) when done.
* \param vsub subscriber to page.
* \param cbfn function to call when the conn is established.
@@ -138,6 +147,7 @@ struct subscr_request *subscr_request_conn(struct vlr_subscr *vsub,
{
int rc;
struct subscr_request *request;
+ struct gsm_network *net = vsub->vlr->user_ctx;
/* Start paging.. we know it is async so we can do it before */
if (!vsub->cs.is_paging) {
@@ -152,6 +162,8 @@ struct subscr_request *subscr_request_conn(struct vlr_subscr *vsub,
/* reduced on the first paging callback */
vlr_subscr_get(vsub);
vsub->cs.is_paging = true;
+ osmo_timer_setup(&vsub->cs.paging_response_timer, paging_response_timer_cb, vsub);
+ osmo_timer_schedule(&vsub->cs.paging_response_timer, net->paging_response_timer, 0);
} else {
LOGP(DMM, LOGL_DEBUG, "Subscriber %s already paged.\n",
vlr_subscr_name(vsub));
diff --git a/src/libmsc/msc_vty.c b/src/libmsc/msc_vty.c
index 14ad19ec1..c1c9f6bcf 100644
--- a/src/libmsc/msc_vty.c
+++ b/src/libmsc/msc_vty.c
@@ -109,6 +109,22 @@ DEFUN(cfg_msc_auth_tuple_reuse_on_error, cfg_msc_auth_tuple_reuse_on_error_cmd,
return CMD_SUCCESS;
}
+DEFUN(cfg_msc_paging_response_timer, cfg_msc_paging_response_timer_cmd,
+ "paging response-timer (default|<1-65535>)",
+ "Configure Paging\n"
+ "Set Paging timeout, the minimum time to pass between (unsuccessful) Pagings sent towards"
+ " BSS or RNC\n"
+ "Set to default timeout (" OSMO_STRINGIFY_VAL(MSC_PAGING_RESPONSE_TIMER_DEFAULT) " seconds)\n"
+ "Set paging timeout in seconds\n")
+{
+ struct gsm_network *gsmnet = gsmnet_from_vty(vty);
+ if (!strcmp(argv[1], "default"))
+ gsmnet->paging_response_timer = MSC_PAGING_RESPONSE_TIMER_DEFAULT;
+ else
+ gsmnet->paging_response_timer = atoi(argv[0]);
+ return CMD_SUCCESS;
+}
+
static int config_write_msc(struct vty *vty)
{
struct gsm_network *gsmnet = gsmnet_from_vty(vty);
@@ -130,6 +146,9 @@ static int config_write_msc(struct vty *vty)
vty_out(vty, " auth-tuple-reuse-on-error 1%s",
VTY_NEWLINE);
+ if (gsmnet->paging_response_timer != MSC_PAGING_RESPONSE_TIMER_DEFAULT)
+ vty_out(vty, " paging response-timer %u%s", gsmnet->paging_response_timer, VTY_NEWLINE);
+
mgcp_client_config_write(vty, " ");
#ifdef BUILD_IU
ranap_iu_vty_config_write(vty, " ");
@@ -186,6 +205,7 @@ void msc_vty_init(struct gsm_network *msc_network)
install_element(MSC_NODE, &cfg_msc_auth_tuple_reuse_on_error_cmd);
install_element(MSC_NODE, &cfg_msc_cs7_instance_a_cmd);
install_element(MSC_NODE, &cfg_msc_cs7_instance_iu_cmd);
+ install_element(MSC_NODE, &cfg_msc_paging_response_timer_cmd);
mgcp_client_vty_init(msc_network, MSC_NODE, &msc_network->mgw.conf);
#ifdef BUILD_IU
diff --git a/tests/msc_vlr/msc_vlr_test_ms_timeout.c b/tests/msc_vlr/msc_vlr_test_ms_timeout.c
index d8a3a314e..4e0e27d1d 100644
--- a/tests/msc_vlr/msc_vlr_test_ms_timeout.c
+++ b/tests/msc_vlr/msc_vlr_test_ms_timeout.c
@@ -182,8 +182,101 @@ void test_ms_timeout_cm_auth_resp()
comment_end();
}
+void test_ms_timeout_paging()
+{
+ struct vlr_subscr *vsub;
+ const char *imsi = "901700000004620";
+
+ rx_from_ran = RAN_GERAN_A;
+
+ comment_start();
+
+ fake_time_start();
+
+ btw("Location Update request causes a GSUP LU request to HLR");
+ lu_result_sent = RES_NONE;
+ gsup_expect_tx("04010809710000004026f0");
+ ms_sends_msg("050802008168000130089910070000006402");
+ OSMO_ASSERT(gsup_tx_confirmed);
+ VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+ btw("HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT");
+ gsup_rx("10010809710000004026f00804036470f1",
+ "12010809710000004026f0");
+ VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+ btw("HLR also sends GSUP _UPDATE_LOCATION_RESULT");
+ expect_bssap_clear();
+ gsup_rx("06010809710000004026f0", NULL);
+
+ btw("LU was successful, and the conn has already been closed");
+ VERBOSE_ASSERT(lu_result_sent, == RES_ACCEPT, "%d");
+ VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
+ EXPECT_CONN_COUNT(0);
+
+ BTW("an SMS is sent, MS is paged");
+ paging_expect_imsi(imsi);
+ paging_sent = false;
+ vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
+ OSMO_ASSERT(vsub);
+ VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 0, "%d");
+
+ send_sms(vsub, vsub,
+ "Privacy in residential applications is a desirable"
+ " marketing option.");
+
+ VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 1, "%d");
+ vlr_subscr_put(vsub);
+ vsub = NULL;
+ VERBOSE_ASSERT(paging_sent, == true, "%d");
+ VERBOSE_ASSERT(paging_stopped, == false, "%d");
+
+ btw("time passes and no paging result is received");
+
+ fake_time_passes(MSC_PAGING_RESPONSE_TIMER_DEFAULT - 1, 0);
+
+ btw("the paging timeout has not yet expired");
+ VERBOSE_ASSERT(paging_stopped, == false, "%d");
+ vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
+ OSMO_ASSERT(vsub);
+ VERBOSE_ASSERT(vsub->cs.is_paging, == true, "%d");
+ btw("another request is added to the list but does not cause another paging");
+ paging_sent = false;
+ paging_expect_imsi(NULL);
+ send_sms(vsub, vsub,
+ "One paging ought to be enough for anyone.");
+ VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 2, "%d");
+ vlr_subscr_put(vsub);
+ vsub = NULL;
+ VERBOSE_ASSERT(paging_sent, == false, "%d");
+
+ btw("the paging timeout expires, the paging as well as the requests are canceled");
+ fake_time_passes(2, 0);
+ VERBOSE_ASSERT(paging_stopped, == true, "%d");
+
+ vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
+ OSMO_ASSERT(vsub);
+ VERBOSE_ASSERT(vsub->cs.is_paging, == false, "%d");
+ VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 0, "%d");
+ vlr_subscr_put(vsub);
+ vsub = NULL;
+
+ BTW("subscriber detaches");
+ expect_bssap_clear();
+ ms_sends_msg("050130089910070000006402");
+ VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
+
+ vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
+ OSMO_ASSERT(!vsub);
+
+ EXPECT_CONN_COUNT(0);
+ clear_vlr();
+ comment_end();
+}
+
msc_vlr_test_func_t msc_vlr_tests[] = {
test_ms_timeout_lu_auth_resp,
test_ms_timeout_cm_auth_resp,
+ test_ms_timeout_paging,
NULL
};
diff --git a/tests/msc_vlr/msc_vlr_test_ms_timeout.err b/tests/msc_vlr/msc_vlr_test_ms_timeout.err
index 50f60fd75..c8b7e962e 100644
--- a/tests/msc_vlr/msc_vlr_test_ms_timeout.err
+++ b/tests/msc_vlr/msc_vlr_test_ms_timeout.err
@@ -337,6 +337,173 @@ DREF freeing VLR subscr MSISDN:46071
full talloc report on 'msgb' (total 0 bytes in 1 blocks)
talloc_total_blocks(tall_bsc_ctx) == 9
+===== test_ms_timeout_paging
+- Total time passed: 0.000000 s
+- Location Update request causes a GSUP LU request to HLR
+ MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
+ new conn
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
+DREF unknown: MSC conn use + fsm == 2 (0x5)
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_INIT}: Allocated
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_INIT}: Received Event SUBSCR_CONN_E_START
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_INIT}: state_chg to SUBSCR_CONN_S_NEW
+DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
+DMM LU/new-LAC: 1/23
+DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_IDLE}: Allocated
+DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_IDLE}: is child of Subscr_Conn(901700000004620)
+DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_IDLE}: rev=GSM net=GERAN (no Auth)
+DVLR vlr_lu_fsm(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(901700000004620){VLR_ULA_S_IDLE}: vlr_loc_upd_node1()
+DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_IDLE}: vlr_loc_upd_post_auth()
+DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_IDLE}: vlr_loc_upd_post_ciph()
+DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_IDLE}: vlr_loc_upd_node_4()
+DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_HLR_UPD
+DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Allocated
+DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: is child of vlr_lu_fsm(901700000004620)
+DVLR upd_hlr_vlr_fsm(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(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
+DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
+ 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 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(901700000004620){VLR_ULA_S_WAIT_HLR_UPD}: Received Event VLR_ULA_E_HLR_LU_RES
+DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_WAIT_FOR_DATA}: Received Event UPD_HLR_VLR_E_UPD_LOC_ACK
+DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_WAIT_FOR_DATA}: state_chg to UPD_HLR_VLR_S_DONE
+DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_DONE}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
+DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_DONE}: Removing from parent vlr_lu_fsm(901700000004620)
+DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_DONE}: Freeing instance
+DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_DONE}: Deallocated
+DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_HLR_UPD}: Received Event VLR_ULA_E_UPD_HLR_COMPL
+DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_HLR_UPD}: state_chg to VLR_ULA_S_WAIT_LU_COMPL
+DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_INIT}: Allocated
+DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_INIT}: is child of vlr_lu_fsm(901700000004620)
+DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_INIT}: Received Event LU_COMPL_VLR_E_START
+DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_INIT}: state_chg to LU_COMPL_VLR_S_WAIT_SUB_PRES
+DVLR sub_pres_vlr_fsm(901700000004620){SUB_PRES_VLR_S_INIT}: Allocated
+DVLR sub_pres_vlr_fsm(901700000004620){SUB_PRES_VLR_S_INIT}: is child of lu_compl_vlr_fsm(901700000004620)
+DVLR sub_pres_vlr_fsm(901700000004620){SUB_PRES_VLR_S_INIT}: Received Event SUB_PRES_VLR_E_START
+DVLR sub_pres_vlr_fsm(901700000004620){SUB_PRES_VLR_S_INIT}: state_chg to SUB_PRES_VLR_S_DONE
+DVLR sub_pres_vlr_fsm(901700000004620){SUB_PRES_VLR_S_DONE}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
+DVLR sub_pres_vlr_fsm(901700000004620){SUB_PRES_VLR_S_DONE}: Removing from parent lu_compl_vlr_fsm(901700000004620)
+DVLR sub_pres_vlr_fsm(901700000004620){SUB_PRES_VLR_S_DONE}: Freeing instance
+DVLR sub_pres_vlr_fsm(901700000004620){SUB_PRES_VLR_S_DONE}: Deallocated
+DVLR lu_compl_vlr_fsm(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(901700000004620){LU_COMPL_VLR_S_WAIT_SUB_PRES}: state_chg to LU_COMPL_VLR_S_DONE
+DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_LU_COMPL_SUCCESS
+DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
+DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_DONE}: Removing from parent vlr_lu_fsm(901700000004620)
+DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_DONE}: Freeing instance
+DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_DONE}: Deallocated
+DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_S_DONE
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
+DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
+DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Removing from parent Subscr_Conn(901700000004620)
+DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
+DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Freeing instance
+DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Deallocated
+DMM msc_subscr_conn_close(vsub=MSISDN:46071, cause=2): no conn fsm, releasing directly without release event.
+- BSSAP Clear --RAN_GERAN_A--> MS
+DREF MSISDN:46071: MSC conn use - fsm == 0 (0x0)
+DRLL subscr MSISDN:46071: Freeing subscriber connection
+DREF VLR subscr MSISDN:46071 usage decreases to: 2
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Freeing instance
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Deallocated
+DREF VLR subscr MSISDN:46071 usage decreases to: 1
+<-- 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
+ llist_count(&net->subscr_conns) == 0
+---
+- an SMS is sent, MS is paged
+DREF VLR subscr MSISDN:46071 usage increases to: 2
+ llist_count(&vsub->cs.requests) == 0
+DREF VLR subscr MSISDN:46071 usage increases to: 3
+DMM Subscriber MSISDN:46071 not paged yet, start paging.
+ RAN_GERAN_A sends out paging request to IMSI 901700000004620, TMSI 0xffffffff, LAC 23
+ strcmp(paging_expecting_imsi, imsi) == 0
+DREF VLR subscr MSISDN:46071 usage increases to: 4
+ llist_count(&vsub->cs.requests) == 1
+DREF VLR subscr MSISDN:46071 usage decreases to: 3
+ paging_sent == 1
+ paging_stopped == 0
+- time passes and no paging result is received
+- Total time passed: 9.000000 s
+- the paging timeout has not yet expired
+ paging_stopped == 0
+DREF VLR subscr MSISDN:46071 usage increases to: 4
+ vsub->cs.is_paging == 1
+- another request is added to the list but does not cause another paging
+DREF VLR subscr MSISDN:46071 usage increases to: 5
+DMM Subscriber MSISDN:46071 already paged.
+ llist_count(&vsub->cs.requests) == 2
+DREF VLR subscr MSISDN:46071 usage decreases to: 4
+ paging_sent == 0
+- the paging timeout expires, the paging as well as the requests are canceled
+- Total time passed: 11.000000 s
+DPAG Paging failure for MSISDN:46071 (event=1)
+DPAG Calling paging cbfn.
+DREF VLR subscr MSISDN:46071 usage decreases to: 3
+DPAG Calling paging cbfn.
+DREF VLR subscr MSISDN:46071 usage decreases to: 2
+DREF VLR subscr MSISDN:46071 usage decreases to: 1
+ paging_stopped == 1
+DREF VLR subscr MSISDN:46071 usage increases to: 2
+ vsub->cs.is_paging == 0
+ llist_count(&vsub->cs.requests) == 0
+DREF VLR subscr MSISDN:46071 usage decreases to: 1
+---
+- subscriber detaches
+ MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
+ new conn
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
+DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
+DREF VLR subscr MSISDN:46071 usage increases to: 2
+DMM IMSI DETACH for MSISDN:46071
+DREF VLR subscr MSISDN:46071 usage decreases to: 1
+DREF VLR subscr MSISDN:46071 usage decreases to: 0
+DREF freeing VLR subscr MSISDN:46071
+DMM msc_subscr_conn_close(vsub=unknown, cause=0): no conn fsm, releasing directly without release event.
+- BSSAP Clear --RAN_GERAN_A--> MS
+DREF unknown: MSC conn use - compl_l3 == 0 (0x0)
+DRLL Freeing subscriber connection with NULL subscriber
+ bssap_clear_sent == 1
+ llist_count(&net->subscr_conns) == 0
+===== test_ms_timeout_paging: SUCCESS
+
+full talloc report on 'msgb' (total 0 bytes in 1 blocks)
+talloc_total_blocks(tall_bsc_ctx) == 9
+
full talloc report on 'msgb' (total 0 bytes in 1 blocks)
talloc_total_blocks(tall_bsc_ctx) == 9