diff --git a/tests/msc_vlr/msc_vlr_test_gsm_authen.c b/tests/msc_vlr/msc_vlr_test_gsm_authen.c
new file mode 100644
index 0000000..22e549b
--- /dev/null
+++ b/tests/msc_vlr/msc_vlr_test_gsm_authen.c
@@ -0,0 +1,888 @@
+/* Osmocom MSC+VLR end-to-end tests */
+
+/* (C) 2017 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
+ *
+ * All Rights Reserved
+ *
+ * Author: Neels Hofmeyr <nhofmeyr@sysmocom.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "msc_vlr_tests.h"
+
+void test_gsm_authen()
+{
+	struct vlr_subscr *vsub;
+	const char *imsi = "901700000004620";
+
+	comment_start();
+
+	net->authentication_required = true;
+
+	btw("Location Update request causes a GSUP Send Auth Info request to HLR");
+	lu_result_sent = RES_NONE;
+	gsup_expect_tx("08010809710000004026f0");
+	ms_sends_msg("050802008168000130089910070000006402");
+	OSMO_ASSERT(gsup_tx_confirmed);
+	VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+	btw("from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS");
+	auth_request_sent = false;
+	auth_request_expect_rand = "585df1ae287f6e273dce07090d61320b";
+	auth_request_expect_autn = NULL;
+	/* Based on a Ki of 000102030405060708090a0b0c0d0e0f */
+	gsup_rx("0a"
+		/* imsi */
+		"0108" "09710000004026f0"
+		/* 5 auth vectors... */
+		/* TL    TL     rand */
+		"0322"  "2010" "585df1ae287f6e273dce07090d61320b"
+		/*       TL     sres       TL     kc */
+			"2104" "2d8b2c3e" "2208" "61855fb81fc2a800"
+		"0322"  "2010" "12aca96fb4ffdea5c985cbafa9b6e18b"
+			"2104" "20bde240" "2208" "07fa7502e07e1c00"
+		"0322"  "2010" "e7c03ba7cf0e2fde82b2dc4d63077d42"
+			"2104" "a29514ae" "2208" "e2b234f807886400"
+		"0322"  "2010" "fa8f20b781b5881329d4fea26b1a3c51"
+			"2104" "5afc8d72" "2208" "2392f14f709ae000"
+		"0322"  "2010" "0fd4cc8dbe8715d1f439e304edfd68dc"
+			"2104" "bc8d1c5b" "2208" "da7cdd6bfe2d7000",
+		NULL);
+	VERBOSE_ASSERT(auth_request_sent, == true, "%d");
+	VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+	btw("If the HLR were to send a GSUP _UPDATE_LOCATION_RESULT we'd still reject");
+	gsup_rx("06010809710000004026f0", NULL);
+	EXPECT_ACCEPTED(false);
+
+	thwart_rx_non_initial_requests();
+
+	VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+	btw("MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR");
+	gsup_expect_tx("04010809710000004026f0");
+	ms_sends_msg("05542d8b2c3e");
+	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");
+	gsup_rx("06010809710000004026f0", NULL);
+
+	btw("LU was successful, and the conn has already been closed");
+	VERBOSE_ASSERT(lu_result_sent, == RES_ACCEPT, "%d");
+	EXPECT_CONN_COUNT(0);
+
+	BTW("after a while, a new conn sends a CM Service Request. VLR responds with Auth Req, 2nd auth vector");
+	auth_request_sent = false;
+	auth_request_expect_rand = "12aca96fb4ffdea5c985cbafa9b6e18b";
+	cm_service_result_sent = RES_NONE;
+	ms_sends_msg("05247803305886089910070000006402");
+	OSMO_ASSERT(g_conn);
+	OSMO_ASSERT(g_conn->conn_fsm);
+	OSMO_ASSERT(g_conn->vsub);
+	VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
+	VERBOSE_ASSERT(auth_request_sent, == true, "%d");
+
+	btw("needs auth, not yet accepted");
+	EXPECT_ACCEPTED(false);
+	thwart_rx_non_initial_requests();
+
+	btw("MS sends Authen Response, VLR accepts with a CM Service Accept");
+	gsup_expect_tx(NULL);
+	ms_sends_msg("0554" "20bde240" /* 2nd vector's sres, s.a. */);
+	VERBOSE_ASSERT(cm_service_result_sent, == RES_ACCEPT, "%d");
+
+	btw("a USSD request is serviced");
+	dtap_expect_tx_ussd("Your extension is 46071\r");
+	ms_sends_msg("0b3b1c15a11302010002013b300b04010f0406aa510c061b017f0100");
+	OSMO_ASSERT(dtap_tx_confirmed);
+
+	btw("all requests serviced, conn has been released");
+	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("the subscriber and its pending request should remain");
+	vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
+	OSMO_ASSERT(vsub);
+	VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 1, "%d");
+	vlr_subscr_put(vsub);
+
+	btw("MS replies with Paging Response, and VLR sends Auth Request with third key");
+	auth_request_sent = false;
+	auth_request_expect_rand = "e7c03ba7cf0e2fde82b2dc4d63077d42";
+	ms_sends_msg("06270703305882089910070000006402");
+	VERBOSE_ASSERT(auth_request_sent, == true, "%d");
+
+	btw("needs auth, not yet accepted");
+	EXPECT_ACCEPTED(false);
+	thwart_rx_non_initial_requests();
+
+	btw("MS sends Authen Response, VLR accepts and sends pending SMS");
+	dtap_expect_tx("09" /* SMS messages */
+		       "01" /* CP-DATA */
+		       "58" /* length */
+		       "01" /* Network to MS */
+		       "00" /* reference */
+		       /* originator (gsm411_send_sms() hardcodes this weird nr) */
+		       "0791" "447758100650" /* 447785016005 */
+		       "00" /* dest */
+		       /* SMS TPDU */
+		       "4c" /* len */
+		       "00" /* SMS deliver */
+		       "05806470f1" /* originating address 46071 */
+		       "00" /* TP-PID */
+		       "00" /* GSM default alphabet */
+		       "071010" /* Y-M-D (from wrapped gsm340_gen_scts())*/
+		       "000000" /* H-M-S */
+		       "00" /* GMT+0 */
+		       "44" /* data length */
+		       "5079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0e"
+		       "d3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb"
+		       "0c7ac3e9e9b7db05");
+	ms_sends_msg("0554" "a29514ae" /* 3rd vector's sres, s.a. */);
+	VERBOSE_ASSERT(dtap_tx_confirmed, == true, "%d");
+	VERBOSE_ASSERT(paging_stopped, == true, "%d");
+
+	btw("SMS was delivered, no requests pending for subscr");
+	vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
+	OSMO_ASSERT(vsub);
+	VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 0, "%d");
+	vlr_subscr_put(vsub);
+
+	btw("conn is still open to wait for SMS ack dance");
+	EXPECT_CONN_COUNT(1);
+
+	btw("MS replies with CP-ACK for received SMS");
+	ms_sends_msg("8904");
+	EXPECT_CONN_COUNT(1);
+
+	btw("MS also sends RP-ACK, MSC in turn sends CP-ACK for that");
+	dtap_expect_tx("0904");
+	ms_sends_msg("890106020041020000");
+	VERBOSE_ASSERT(dtap_tx_confirmed, == true, "%d");
+
+	btw("SMS is done, conn is gone");
+	EXPECT_CONN_COUNT(0);
+
+	BTW("subscriber detaches");
+	ms_sends_msg("050130089910070000006402");
+
+	EXPECT_CONN_COUNT(0);
+	clear_vlr();
+	comment_end();
+}
+
+void test_gsm_authen_tmsi()
+{
+	struct vlr_subscr *vsub;
+	const char *imsi = "901700000004620";
+
+	comment_start();
+
+	net->authentication_required = true;
+	net->vlr->cfg.assign_tmsi = true;
+
+	btw("Location Update request causes a GSUP Send Auth Info request to HLR");
+	lu_result_sent = RES_NONE;
+	gsup_expect_tx("08010809710000004026f0");
+	ms_sends_msg("050802008168000130089910070000006402");
+	OSMO_ASSERT(gsup_tx_confirmed);
+	VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+	btw("from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS");
+	auth_request_sent = false;
+	auth_request_expect_rand = "585df1ae287f6e273dce07090d61320b";
+	auth_request_expect_autn = NULL;
+	/* Based on a Ki of 000102030405060708090a0b0c0d0e0f */
+	gsup_rx("0a"
+		/* imsi */
+		"0108" "09710000004026f0"
+		/* 5 auth vectors... */
+		/* TL    TL     rand */
+		"0322"  "2010" "585df1ae287f6e273dce07090d61320b"
+		/*       TL     sres       TL     kc */
+			"2104" "2d8b2c3e" "2208" "61855fb81fc2a800"
+		"0322"  "2010" "12aca96fb4ffdea5c985cbafa9b6e18b"
+			"2104" "20bde240" "2208" "07fa7502e07e1c00"
+		"0322"  "2010" "e7c03ba7cf0e2fde82b2dc4d63077d42"
+			"2104" "a29514ae" "2208" "e2b234f807886400"
+		"0322"  "2010" "fa8f20b781b5881329d4fea26b1a3c51"
+			"2104" "5afc8d72" "2208" "2392f14f709ae000"
+		"0322"  "2010" "0fd4cc8dbe8715d1f439e304edfd68dc"
+			"2104" "bc8d1c5b" "2208" "da7cdd6bfe2d7000",
+		NULL);
+	VERBOSE_ASSERT(auth_request_sent, == true, "%d");
+	VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+	btw("If the HLR were to send a GSUP _UPDATE_LOCATION_RESULT we'd still reject");
+	gsup_rx("06010809710000004026f0", NULL);
+	EXPECT_ACCEPTED(false);
+
+	thwart_rx_non_initial_requests();
+
+	VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+	btw("MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR");
+	gsup_expect_tx("04010809710000004026f0");
+	ms_sends_msg("05542d8b2c3e");
+	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");
+	gsup_rx("06010809710000004026f0", 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");
+	EXPECT_ACCEPTED(false);
+	thwart_rx_non_initial_requests();
+
+	btw("even though the TMSI is not acked, we can already find the subscr with it");
+	vsub = vlr_subscr_find_by_tmsi(net->vlr, 0x03020100);
+	VERBOSE_ASSERT(vsub != NULL, == true, "%d");
+	VERBOSE_ASSERT(strcmp(vsub->imsi, imsi), == 0, "%d");
+	VERBOSE_ASSERT(vsub->tmsi_new, == 0x03020100, "0x%08x");
+	VERBOSE_ASSERT(vsub->tmsi, == GSM_RESERVED_TMSI, "0x%08x");
+	vlr_subscr_put(vsub);
+
+	btw("MS sends TMSI Realloc Complete");
+	ms_sends_msg("055b");
+
+	btw("LU was successful, and the conn has already been closed");
+	EXPECT_CONN_COUNT(0);
+
+	btw("Subscriber has the new TMSI");
+	vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
+	VERBOSE_ASSERT(vsub != NULL, == true, "%d");
+	VERBOSE_ASSERT(strcmp(vsub->imsi, imsi), == 0, "%d");
+	VERBOSE_ASSERT(vsub->tmsi_new, == GSM_RESERVED_TMSI, "0x%08x");
+	VERBOSE_ASSERT(vsub->tmsi, == 0x03020100, "0x%08x");
+	vlr_subscr_put(vsub);
+
+	BTW("after a while, a new conn sends a CM Service Request using above TMSI. VLR responds with Auth Req, 2nd auth vector");
+	auth_request_sent = false;
+	auth_request_expect_rand = "12aca96fb4ffdea5c985cbafa9b6e18b";
+	cm_service_result_sent = RES_NONE;
+	ms_sends_msg("05247803305886" "05f4" "03020100");
+	OSMO_ASSERT(g_conn);
+	OSMO_ASSERT(g_conn->conn_fsm);
+	OSMO_ASSERT(g_conn->vsub);
+	VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
+	VERBOSE_ASSERT(auth_request_sent, == true, "%d");
+
+	btw("needs auth, not yet accepted");
+	EXPECT_ACCEPTED(false);
+	thwart_rx_non_initial_requests();
+
+	btw("MS sends Authen Response, VLR accepts with a CM Service Accept");
+	gsup_expect_tx(NULL);
+	ms_sends_msg("0554" "20bde240" /* 2nd vector's sres, s.a. */);
+	VERBOSE_ASSERT(cm_service_result_sent, == RES_ACCEPT, "%d");
+
+	btw("a USSD request is serviced");
+	dtap_expect_tx_ussd("Your extension is 46071\r");
+	ms_sends_msg("0b3b1c15a11302010002013b300b04010f0406aa510c061b017f0100");
+	OSMO_ASSERT(dtap_tx_confirmed);
+
+	btw("all requests serviced, conn has been released");
+	EXPECT_CONN_COUNT(0);
+
+	BTW("an SMS is sent, MS is paged");
+	paging_expect_tmsi(0x03020100);
+	paging_sent = false;
+	vsub = vlr_subscr_find_by_tmsi(net->vlr, 0x03020100);
+	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("the subscriber and its pending request should remain");
+	vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
+	OSMO_ASSERT(vsub);
+	VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 1, "%d");
+	vlr_subscr_put(vsub);
+
+	btw("MS replies with Paging Response using TMSI, and VLR sends Auth Request with third key");
+	auth_request_sent = false;
+	auth_request_expect_rand = "e7c03ba7cf0e2fde82b2dc4d63077d42";
+	ms_sends_msg("06270703305882" "05f4" "03020100");
+	VERBOSE_ASSERT(auth_request_sent, == true, "%d");
+
+	btw("needs auth, not yet accepted");
+	EXPECT_ACCEPTED(false);
+	thwart_rx_non_initial_requests();
+
+	btw("MS sends Authen Response, VLR accepts and sends pending SMS");
+	dtap_expect_tx("09" /* SMS messages */
+		       "01" /* CP-DATA */
+		       "58" /* length */
+		       "01" /* Network to MS */
+		       "00" /* reference */
+		       /* originator (gsm411_send_sms() hardcodes this weird nr) */
+		       "0791" "447758100650" /* 447785016005 */
+		       "00" /* dest */
+		       /* SMS TPDU */
+		       "4c" /* len */
+		       "00" /* SMS deliver */
+		       "05806470f1" /* originating address 46071 */
+		       "00" /* TP-PID */
+		       "00" /* GSM default alphabet */
+		       "071010" /* Y-M-D (from wrapped gsm340_gen_scts())*/
+		       "000000" /* H-M-S */
+		       "00" /* GMT+0 */
+		       "44" /* data length */
+		       "5079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0e"
+		       "d3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb"
+		       "0c7ac3e9e9b7db05");
+	ms_sends_msg("0554" "a29514ae" /* 3rd vector's sres, s.a. */);
+	VERBOSE_ASSERT(dtap_tx_confirmed, == true, "%d");
+	VERBOSE_ASSERT(paging_stopped, == true, "%d");
+
+	btw("SMS was delivered, no requests pending for subscr");
+	vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
+	OSMO_ASSERT(vsub);
+	VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 0, "%d");
+	vlr_subscr_put(vsub);
+
+	btw("conn is still open to wait for SMS ack dance");
+	EXPECT_CONN_COUNT(1);
+
+	btw("MS replies with CP-ACK for received SMS");
+	ms_sends_msg("8904");
+	EXPECT_CONN_COUNT(1);
+
+	btw("MS also sends RP-ACK, MSC in turn sends CP-ACK for that");
+	dtap_expect_tx("0904");
+	ms_sends_msg("890106020041020000");
+	VERBOSE_ASSERT(dtap_tx_confirmed, == true, "%d");
+
+	btw("SMS is done, conn is gone");
+	EXPECT_CONN_COUNT(0);
+
+	/* TODO: when the subscriber detaches, the vlr_subscr gets
+	 * deallocated and we no longer know the TMSI. This case is covered by
+	 * test_lu_unknown_tmsi(), so here I'd like to still have the TMSI.
+	BTW("subscriber detaches, using TMSI");
+	ms_sends_msg("050130" "05f4" "03020100");
+	EXPECT_CONN_COUNT(0);
+	 */
+
+	BTW("subscriber sends LU Request, this time with the TMSI");
+	btw("Location Update request causes an Auth Req to MS");
+	lu_result_sent = RES_NONE;
+	auth_request_sent = false;
+	auth_request_expect_rand = "fa8f20b781b5881329d4fea26b1a3c51";
+	ms_sends_msg("050802008168000130" "05f4" "03020100");
+	VERBOSE_ASSERT(auth_request_sent, == true, "%d");
+	VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+	btw("MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR");
+	gsup_expect_tx("04010809710000004026f0");
+	ms_sends_msg("05545afc8d72");
+	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");
+	gsup_rx("06010809710000004026f0", 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");
+	EXPECT_ACCEPTED(false);
+	thwart_rx_non_initial_requests();
+
+	btw("even though the TMSI is not acked, we can already find the subscr with it");
+	vsub = vlr_subscr_find_by_tmsi(net->vlr, 0x07060504);
+	VERBOSE_ASSERT(vsub != NULL, == true, "%d");
+	VERBOSE_ASSERT(strcmp(vsub->imsi, imsi), == 0, "%d");
+	VERBOSE_ASSERT(vsub->tmsi_new, == 0x07060504, "0x%08x");
+	VERBOSE_ASSERT(vsub->tmsi, == 0x03020100, "0x%08x");
+	vlr_subscr_put(vsub);
+
+	btw("MS sends TMSI Realloc Complete");
+	ms_sends_msg("055b");
+
+	btw("LU was successful, and the conn has already been closed");
+	EXPECT_CONN_COUNT(0);
+
+	btw("subscriber has the new TMSI");
+	vsub = vlr_subscr_find_by_tmsi(net->vlr, 0x07060504);
+	VERBOSE_ASSERT(vsub != NULL, == true, "%d");
+	VERBOSE_ASSERT(strcmp(vsub->imsi, imsi), == 0, "%d");
+	VERBOSE_ASSERT(vsub->tmsi_new, == GSM_RESERVED_TMSI, "0x%08x");
+	VERBOSE_ASSERT(vsub->tmsi, == 0x07060504, "0x%08x");
+	vlr_subscr_put(vsub);
+
+	BTW("subscriber detaches, using new TMSI");
+	ms_sends_msg("050130" "05f4" "07060504");
+
+	EXPECT_CONN_COUNT(0);
+	clear_vlr();
+	comment_end();
+}
+
+void test_gsm_authen_imei()
+{
+	struct vlr_subscr *vsub;
+	const char *imsi = "901700000004620";
+
+	comment_start();
+
+	net->authentication_required = true;
+	net->vlr->cfg.check_imei_rqd = true;
+
+	btw("Location Update request causes a GSUP Send Auth Info request to HLR");
+	lu_result_sent = RES_NONE;
+	gsup_expect_tx("08010809710000004026f0");
+	ms_sends_msg("050802008168000130089910070000006402");
+	OSMO_ASSERT(gsup_tx_confirmed);
+	VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+	btw("from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS");
+	auth_request_sent = false;
+	auth_request_expect_rand = "585df1ae287f6e273dce07090d61320b";
+	auth_request_expect_autn = NULL;
+	/* Based on a Ki of 000102030405060708090a0b0c0d0e0f */
+	gsup_rx("0a"
+		/* imsi */
+		"0108" "09710000004026f0"
+		/* 5 auth vectors... */
+		/* TL    TL     rand */
+		"0322"  "2010" "585df1ae287f6e273dce07090d61320b"
+		/*       TL     sres       TL     kc */
+			"2104" "2d8b2c3e" "2208" "61855fb81fc2a800"
+		"0322"  "2010" "12aca96fb4ffdea5c985cbafa9b6e18b"
+			"2104" "20bde240" "2208" "07fa7502e07e1c00"
+		"0322"  "2010" "e7c03ba7cf0e2fde82b2dc4d63077d42"
+			"2104" "a29514ae" "2208" "e2b234f807886400"
+		"0322"  "2010" "fa8f20b781b5881329d4fea26b1a3c51"
+			"2104" "5afc8d72" "2208" "2392f14f709ae000"
+		"0322"  "2010" "0fd4cc8dbe8715d1f439e304edfd68dc"
+			"2104" "bc8d1c5b" "2208" "da7cdd6bfe2d7000",
+		NULL);
+	VERBOSE_ASSERT(auth_request_sent, == true, "%d");
+	VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+	btw("If the HLR were to send a GSUP _UPDATE_LOCATION_RESULT we'd still reject");
+	gsup_rx("06010809710000004026f0", NULL);
+	EXPECT_ACCEPTED(false);
+	thwart_rx_non_initial_requests();
+	VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+	btw("MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR");
+	gsup_expect_tx("04010809710000004026f0");
+	ms_sends_msg("05542d8b2c3e");
+	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, and we send an ID Request for the IMEI to the MS");
+	dtap_expect_tx("051802");
+	gsup_rx("06010809710000004026f0", NULL);
+
+	btw("We will only do business when the IMEI is known");
+	EXPECT_CONN_COUNT(1);
+	vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
+	OSMO_ASSERT(vsub);
+	VERBOSE_ASSERT(vsub->imei[0], == 0, "%d");
+	vlr_subscr_put(vsub);
+	EXPECT_ACCEPTED(false);
+	thwart_rx_non_initial_requests();
+
+	btw("MS replies with an Identity Response");
+	ms_sends_msg("0559084a32244332244332");
+
+	btw("LU was successful, and the conn has already been closed");
+	VERBOSE_ASSERT(lu_result_sent, == RES_ACCEPT, "%d");
+	EXPECT_CONN_COUNT(0);
+
+	btw("Subscriber has the IMEI");
+	vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
+	OSMO_ASSERT(vsub);
+	VERBOSE_ASSERT(strcmp(vsub->imei, "423423423423423"), == 0, "%d");
+	vlr_subscr_put(vsub);
+
+	BTW("subscriber detaches");
+	ms_sends_msg("050130089910070000006402");
+
+	EXPECT_CONN_COUNT(0);
+	clear_vlr();
+	comment_end();
+}
+
+void test_gsm_authen_tmsi_imei()
+{
+	struct vlr_subscr *vsub;
+	const char *imsi = "901700000004620";
+
+	comment_start();
+
+	net->authentication_required = true;
+	net->vlr->cfg.assign_tmsi = true;
+	net->vlr->cfg.check_imei_rqd = true;
+
+	btw("Location Update request causes a GSUP Send Auth Info request to HLR");
+	lu_result_sent = RES_NONE;
+	gsup_expect_tx("08010809710000004026f0");
+	ms_sends_msg("050802008168000130089910070000006402");
+	OSMO_ASSERT(gsup_tx_confirmed);
+	VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+	btw("from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS");
+	auth_request_sent = false;
+	auth_request_expect_rand = "585df1ae287f6e273dce07090d61320b";
+	auth_request_expect_autn = NULL;
+	/* Based on a Ki of 000102030405060708090a0b0c0d0e0f */
+	gsup_rx("0a"
+		/* imsi */
+		"0108" "09710000004026f0"
+		/* 5 auth vectors... */
+		/* TL    TL     rand */
+		"0322"  "2010" "585df1ae287f6e273dce07090d61320b"
+		/*       TL     sres       TL     kc */
+			"2104" "2d8b2c3e" "2208" "61855fb81fc2a800"
+		"0322"  "2010" "12aca96fb4ffdea5c985cbafa9b6e18b"
+			"2104" "20bde240" "2208" "07fa7502e07e1c00"
+		"0322"  "2010" "e7c03ba7cf0e2fde82b2dc4d63077d42"
+			"2104" "a29514ae" "2208" "e2b234f807886400"
+		"0322"  "2010" "fa8f20b781b5881329d4fea26b1a3c51"
+			"2104" "5afc8d72" "2208" "2392f14f709ae000"
+		"0322"  "2010" "0fd4cc8dbe8715d1f439e304edfd68dc"
+			"2104" "bc8d1c5b" "2208" "da7cdd6bfe2d7000",
+		NULL);
+	VERBOSE_ASSERT(auth_request_sent, == true, "%d");
+	VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+	btw("If the HLR were to send a GSUP _UPDATE_LOCATION_RESULT we'd still reject");
+	gsup_rx("06010809710000004026f0", NULL);
+	EXPECT_ACCEPTED(false);
+
+	thwart_rx_non_initial_requests();
+
+	VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+	btw("MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR");
+	gsup_expect_tx("04010809710000004026f0");
+	ms_sends_msg("05542d8b2c3e");
+	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, and we send an ID Request for the IMEI to the MS");
+	dtap_expect_tx("051802");
+	gsup_rx("06010809710000004026f0", NULL);
+
+	btw("We will only do business when the IMEI is known");
+	EXPECT_CONN_COUNT(1);
+	vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
+	OSMO_ASSERT(vsub);
+	VERBOSE_ASSERT(vsub->imei[0], == 0, "%d");
+	vlr_subscr_put(vsub);
+	EXPECT_ACCEPTED(false);
+	thwart_rx_non_initial_requests();
+
+	btw("MS replies with an Identity Response");
+	ms_sends_msg("0559084a32244332244332");
+
+	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");
+	EXPECT_ACCEPTED(false);
+	thwart_rx_non_initial_requests();
+
+	btw("even though the TMSI is not acked, we can already find the subscr with it");
+	vsub = vlr_subscr_find_by_tmsi(net->vlr, 0x03020100);
+	VERBOSE_ASSERT(vsub != NULL, == true, "%d");
+	VERBOSE_ASSERT(strcmp(vsub->imsi, imsi), == 0, "%d");
+	VERBOSE_ASSERT(vsub->tmsi_new, == 0x03020100, "0x%08x");
+	VERBOSE_ASSERT(vsub->tmsi, == GSM_RESERVED_TMSI, "0x%08x");
+	vlr_subscr_put(vsub);
+
+	btw("MS sends TMSI Realloc Complete");
+	ms_sends_msg("055b");
+
+	btw("LU was successful, and the conn has already been closed");
+	EXPECT_CONN_COUNT(0);
+
+	btw("Subscriber has the IMEI and TMSI");
+	vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
+	OSMO_ASSERT(vsub);
+	VERBOSE_ASSERT(strcmp(vsub->imei, "423423423423423"), == 0, "%d");
+	VERBOSE_ASSERT(vsub->tmsi, == 0x03020100, "0x%08x");
+	vlr_subscr_put(vsub);
+
+	BTW("subscriber detaches, using TMSI");
+	ms_sends_msg("050130" "05f4" "03020100");
+
+	EXPECT_CONN_COUNT(0);
+	clear_vlr();
+	comment_end();
+}
+
+void test_gsm_milenage_authen()
+{
+	struct vlr_subscr *vsub;
+	const char *imsi = "901700000010650";
+
+	comment_start();
+
+	net->authentication_required = true;
+	rx_from_ran = RAN_GERAN_A;
+
+	btw("Location Update request causes a GSUP Send Auth Info request to HLR");
+	lu_result_sent = RES_NONE;
+	gsup_expect_tx("080108" "09710000000156f0");
+	ms_sends_msg("0508" /* MM LU */
+		     "7" /* ciph key seq: no key available */
+		     "0" /* LU type: normal */
+		     "ffffff" "0000" /* LAI, LAC */
+		     "30" /* classmark 1: GSM phase 2 */
+		     "089910070000106005" /* IMSI */
+		     );
+	OSMO_ASSERT(gsup_tx_confirmed);
+	VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+	btw("from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS");
+	/* based on auc_3g:
+	 * K = 'EB215756028D60E3275E613320AEC880',
+	 * OPC = 'FB2A3D1B360F599ABAB99DB8669F8308'
+	 * SQN = 0
+	 */
+	auth_request_sent = false;
+	auth_request_expect_rand = "39fa2f4e3d523d8619a73b4f65c3e14d";
+	auth_request_expect_autn = NULL;
+	gsup_rx("0a"
+		/* imsi */
+		"0108" "09710000000156f0"
+		/* 5 auth vectors... */
+		/* TL    TL     rand */
+		"0362"  "2010" "39fa2f4e3d523d8619a73b4f65c3e14d"
+		/*       TL     sres       TL     kc */
+			"2104" "9b36efdf" "2208" "059a4f668f6fbe39"
+		/*       TL     3G IK */
+			"2310" "27497388b6cb044648f396aa155b95ef"
+		/*       TL     3G CK */
+			"2410" "f64735036e5871319c679f4742a75ea1"
+		/*       TL     AUTN */
+			"2510" "8704f5ba55f30000d2ee44b22c8ea919"
+		/*       TL     RES */
+			"2708" "e229c19e791f2e41"
+		"0362"  "2010" "c187a53a5e6b9d573cac7c74451fd46d"
+			"2104" "85aa3130" "2208" "d3d50a000bf04f6e"
+			"2310" "1159ec926a50e98c034a6b7d7c9f418d"
+			"2410" "df3a03d9ca5335641efc8e36d76cd20b"
+			"2510" "1843a645b98d00005b2d666af46c45d9"
+			"2708" "7db47cf7f81e4dc7"
+		"0362"  "2010" "efa9c29a9742148d5c9070348716e1bb"
+			"2104" "69d5f9fb" "2208" "3df176f0c29f1a3d"
+			"2310" "eb50e770ddcc3060101d2f43b6c2b884"
+			"2410" "76542abce5ff9345b0e8947f4c6e019c"
+			"2510" "f9375e6d41e1000096e7fe4ff1c27e39"
+			"2708" "706f996719ba609c"
+		,NULL);
+	VERBOSE_ASSERT(auth_request_sent, == true, "%d");
+	VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+	btw("MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR");
+	gsup_expect_tx("04010809710000000156f0");
+	ms_sends_msg("0554" "9b36efdf");
+	VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+	btw("HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT");
+	gsup_rx("10010809710000000156f00804032443f2",
+		"12010809710000000156f0");
+	VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
+
+	btw("HLR also sends GSUP _UPDATE_LOCATION_RESULT");
+	gsup_rx("06010809710000000156f0", NULL);
+
+	btw("LU was successful, and the conn has already been closed");
+	VERBOSE_ASSERT(lu_result_sent, == RES_ACCEPT, "%d");
+	EXPECT_CONN_COUNT(0);
+
+	BTW("after a while, a new conn sends a CM Service Request. VLR responds with Auth Req, 2nd auth vector");
+	auth_request_sent = false;
+	auth_request_expect_rand = "c187a53a5e6b9d573cac7c74451fd46d";
+	auth_request_expect_autn = NULL;
+	cm_service_result_sent = RES_NONE;
+	ms_sends_msg("052478"
+		     "03305886" /* classmark 2: GSM phase 2 */
+		     "089910070000106005" /* IMSI */);
+	OSMO_ASSERT(g_conn);
+	OSMO_ASSERT(g_conn->conn_fsm);
+	OSMO_ASSERT(g_conn->vsub);
+	VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
+	VERBOSE_ASSERT(auth_request_sent, == true, "%d");
+
+	btw("needs auth, not yet accepted");
+	EXPECT_ACCEPTED(false);
+	thwart_rx_non_initial_requests();
+
+	btw("MS sends Authen Response, VLR accepts with a CM Service Accept");
+	gsup_expect_tx(NULL);
+	ms_sends_msg("0554" "85aa3130"); /* 2nd vector's sres, s.a. */
+	VERBOSE_ASSERT(cm_service_result_sent, == RES_ACCEPT, "%d");
+
+	btw("a USSD request is serviced");
+	dtap_expect_tx_ussd("Your extension is 42342\r");
+	ms_sends_msg("0b3b1c15a11302010002013b300b04010f0406aa510c061b017f0100");
+	OSMO_ASSERT(dtap_tx_confirmed);
+
+	btw("all requests serviced, conn has been released");
+	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("the subscriber and its pending request should remain");
+	vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
+	OSMO_ASSERT(vsub);
+	VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 1, "%d");
+	vlr_subscr_put(vsub);
+
+	btw("MS replies with Paging Response, and VLR sends Auth Request with third key");
+	auth_request_sent = false;
+	auth_request_expect_rand = "efa9c29a9742148d5c9070348716e1bb";
+	auth_request_expect_autn = NULL;
+	ms_sends_msg("062707"
+		     "03305886" /* classmark 2 */
+		     "089910070000106005" /* IMSI */);
+	VERBOSE_ASSERT(auth_request_sent, == true, "%d");
+
+	btw("needs auth, not yet accepted");
+	EXPECT_ACCEPTED(false);
+	thwart_rx_non_initial_requests();
+
+	btw("MS sends Authen Response, VLR accepts and sends pending SMS");
+	dtap_expect_tx("09" /* SMS messages */
+		       "01" /* CP-DATA */
+		       "58" /* length */
+		       "01" /* Network to MS */
+		       "00" /* reference */
+		       /* originator (gsm411_send_sms() hardcodes this weird nr) */
+		       "0791" "447758100650" /* 447785016005 */
+		       "00" /* dest */
+		       /* SMS TPDU */
+		       "4c" /* len */
+		       "00" /* SMS deliver */
+		       "05802443f2" /* originating address 42342 */
+		       "00" /* TP-PID */
+		       "00" /* GSM default alphabet */
+		       "071010" /* Y-M-D (from wrapped gsm340_gen_scts())*/
+		       "000000" /* H-M-S */
+		       "00" /* GMT+0 */
+		       "44" /* data length */
+		       "5079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0e"
+		       "d3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb"
+		       "0c7ac3e9e9b7db05");
+	ms_sends_msg("0554" "69d5f9fb"); /* 3nd vector's sres, s.a. */
+	VERBOSE_ASSERT(dtap_tx_confirmed, == true, "%d");
+	VERBOSE_ASSERT(paging_stopped, == true, "%d");
+
+	btw("SMS was delivered, no requests pending for subscr");
+	vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
+	OSMO_ASSERT(vsub);
+	VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 0, "%d");
+	vlr_subscr_put(vsub);
+
+	btw("conn is still open to wait for SMS ack dance");
+	EXPECT_CONN_COUNT(1);
+
+	btw("MS replies with CP-ACK for received SMS");
+	ms_sends_msg("8904");
+	EXPECT_CONN_COUNT(1);
+
+	btw("MS also sends RP-ACK, MSC in turn sends CP-ACK for that");
+	dtap_expect_tx("0904");
+	ms_sends_msg("890106020041020000");
+	VERBOSE_ASSERT(dtap_tx_confirmed, == true, "%d");
+
+	btw("SMS is done, conn is gone");
+	EXPECT_CONN_COUNT(0);
+
+	BTW("subscriber detaches");
+	ms_sends_msg("050130"
+		     "089910070000106005" /* IMSI */);
+
+	EXPECT_CONN_COUNT(0);
+	clear_vlr();
+	comment_end();
+}
+
+msc_vlr_test_func_t msc_vlr_tests[] = {
+	test_gsm_authen,
+	test_gsm_authen_tmsi,
+	test_gsm_authen_imei,
+	test_gsm_authen_tmsi_imei,
+	test_gsm_milenage_authen,
+	NULL
+};