Add test case for successful handover and unsuccessful handover

7 files changed, 295 insertions, 1 deletions

diff --git a/.gitignore b/.gitignore
index b9af5cf8..c5ade3a9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -38,6 +38,7 @@ tests/paging/paging_test
 tests/cipher/cipher_test
 tests/sysmobts/sysmobts_test
 tests/bursts/bursts_test
+tests/handover/handover_test
 tests/testsuite
 tests/testsuite.log
 
diff --git a/configure.ac b/configure.ac
index 33359c13..3179260e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -86,4 +86,5 @@ AC_OUTPUT(
     tests/cipher/Makefile
     tests/sysmobts/Makefile
     tests/bursts/Makefile
+    tests/handover/Makefile
     Makefile)
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 2b0e2fa3..67dca694 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,4 +1,4 @@
-SUBDIRS = paging cipher sysmobts agch bursts
+SUBDIRS = paging cipher sysmobts agch bursts handover
 
 # The `:;' works around a Bash 3.2 bug when the output is not writeable.
 $(srcdir)/package.m4: $(top_srcdir)/configure.ac
diff --git a/tests/handover/Makefile.am b/tests/handover/Makefile.am
new file mode 100644
index 00000000..a07a527d
--- /dev/null
+++ b/tests/handover/Makefile.am
@@ -0,0 +1,8 @@
+INCLUDES = $(all_includes) -I$(top_srcdir)/include -I$(OPENBSC_INCDIR)
+AM_CFLAGS = -Wall $(LIBOSMOCORE_CFLAGS) $(LIBOSMOGSM_CFLAGS) $(LIBOSMOCODEC_CFLAGS)$(LIBOSMOTRAU_CFLAGS)
+LDADD = $(LIBOSMOCORE_LIBS) $(LIBOSMOGSM_LIBS) $(LIBOSMOCODEC_LIBS) $(LIBOSMOTRAU_LIBS) $(LIBOSMOABIS_LIBS)
+noinst_PROGRAMS = handover_test
+EXTRA_DIST = handover_test.ok
+
+handover_test_SOURCES = handover_test.c
+handover_test_LDADD = $(top_builddir)/src/common/libbts.a $(LDADD)
diff --git a/tests/handover/handover_test.c b/tests/handover/handover_test.c
new file mode 100644
index 00000000..ed4bedd0
--- /dev/null
+++ b/tests/handover/handover_test.c
@@ -0,0 +1,277 @@
+#include <stdint.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <getopt.h>
+#include <limits.h>
+#include <sched.h>
+#include <sys/signal.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+
+#include <osmocom/core/talloc.h>
+#include <osmocom/core/application.h>
+#include <osmocom/vty/telnet_interface.h>
+#include <osmocom/vty/logging.h>
+#include <osmocom/core/gsmtap.h>
+#include <osmocom/core/gsmtap_util.h>
+#include <osmocom/core/bits.h>
+#include <osmocom/core/backtrace.h>
+#include <osmocom/abis/abis.h>
+
+#include <osmo-bts/gsm_data.h>
+#include <osmo-bts/logging.h>
+#include <osmo-bts/abis.h>
+#include <osmo-bts/bts.h>
+#include <osmo-bts/vty.h>
+#include <osmo-bts/bts_model.h>
+#include <osmo-bts/pcu_if.h>
+#include <osmo-bts/l1sap.h>
+#include <osmo-bts/handover.h>
+
+uint8_t phys_info[] = { 0x03, 0x03, 0x0d, 0x06, 0x2d, 0x00, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b };
+
+static struct gsm_bts *bts;
+struct gsm_bts_trx *trx;
+int quit = 0;
+uint8_t abis_mac[6] = { 0, 1, 2, 3, 4, 5 };
+const int pcu_direct = 0;
+int modify_count = 0;
+
+static void expect_phys_info(struct lapdm_entity *le)
+{
+	struct osmo_phsap_prim pp;
+	int rc;
+
+	rc = lapdm_phsap_dequeue_prim(le, &pp);
+	OSMO_ASSERT(rc == 0);
+	OSMO_ASSERT(sizeof(phys_info) == pp.oph.msg->len);
+	OSMO_ASSERT(!memcmp(phys_info, pp.oph.msg->data, pp.oph.msg->len));
+	msgb_free(pp.oph.msg);
+}
+
+int main(int argc, char **argv)
+{
+	struct gsm_bts_role_bts *btsb;
+	void *tall_bts_ctx;
+	void *tall_msgb_ctx;
+	struct e1inp_line *line;
+	struct gsm_lchan *lchan;
+	struct osmo_phsap_prim nl1sap;
+	struct msgb *msg;
+	struct abis_rsl_dchan_hdr *rslh;
+	int i;
+
+	tall_bts_ctx = talloc_named_const(NULL, 1, "OsmoBTS context");
+	tall_msgb_ctx = talloc_named_const(tall_bts_ctx, 1, "msgb");
+	msgb_set_talloc_ctx(tall_msgb_ctx);
+
+	bts_log_init(NULL);
+	osmo_stderr_target->categories[DHO].loglevel = LOGL_DEBUG;
+
+	bts = gsm_bts_alloc(tall_bts_ctx);
+	if (!bts) {
+		fprintf(stderr, "Failed to create BTS structure\n");
+		exit(1);
+	}
+	trx = gsm_bts_trx_alloc(bts);
+	if (!trx) {
+		fprintf(stderr, "Failed to TRX structure\n");
+		exit(1);
+	}
+
+	if (bts_init(bts) < 0) {
+		fprintf(stderr, "unable to to open bts\n");
+		exit(1);
+	}
+
+	btsb = bts_role_bts(bts);
+
+	libosmo_abis_init(NULL);
+
+	line = e1inp_line_create(0, "ipa");
+	OSMO_ASSERT(line);
+
+	e1inp_ts_config_sign(&line->ts[E1INP_SIGN_RSL-1], line);
+	trx->rsl_link = e1inp_sign_link_create(&line->ts[E1INP_SIGN_RSL-1], E1INP_SIGN_RSL, NULL, 0, 0);
+	OSMO_ASSERT(trx->rsl_link);
+	trx->rsl_link->trx = trx;
+
+	fprintf(stderr, "test 1: without timeout\n");
+
+	/* create two lchans for handover */
+	lchan = &trx->ts[1].lchan[0];
+	l1sap_chan_act(lchan->ts->trx, 0x09, NULL);
+	lchan = &trx->ts[2].lchan[0];
+	lchan->ho.active = HANDOVER_ENABLED;
+	lchan->ho.ref = 23;
+	l1sap_chan_act(lchan->ts->trx, 0x0a, NULL);
+	OSMO_ASSERT(msgb_dequeue(&trx->rsl_link->tx_list));
+	OSMO_ASSERT(msgb_dequeue(&trx->rsl_link->tx_list));
+	OSMO_ASSERT(!msgb_dequeue(&trx->rsl_link->tx_list));
+
+	/* send access burst with wrong ref */
+	memset(&nl1sap, 0, sizeof(nl1sap));
+	osmo_prim_init(&nl1sap.oph, SAP_GSM_PH, PRIM_PH_RACH, PRIM_OP_INDICATION, NULL);
+	nl1sap.u.rach_ind.chan_nr = 0x0a;
+	nl1sap.u.rach_ind.ra = 42;
+	l1sap_up(trx, &nl1sap);
+
+	/* expect no action */
+	OSMO_ASSERT(modify_count == 0);
+	OSMO_ASSERT(!msgb_dequeue(&trx->rsl_link->tx_list));
+
+	/* send access burst with correct ref */
+	nl1sap.u.rach_ind.ra = 23;
+	l1sap_up(trx, &nl1sap);
+	OSMO_ASSERT(modify_count == 1);
+
+	/* expect PHYS INFO */
+	expect_phys_info(&trx->ts[2].lchan[0].lapdm_ch.lapdm_dcch);
+
+	/* expect exactly one HO.DET */
+	OSMO_ASSERT(msg = msgb_dequeue(&trx->rsl_link->tx_list));
+	rslh = msgb_l2(msg);
+	OSMO_ASSERT(rslh->c.msg_type == RSL_MT_HANDO_DET);
+	OSMO_ASSERT(!msgb_dequeue(&trx->rsl_link->tx_list));
+
+	/* expect T3105 running */
+	OSMO_ASSERT(osmo_timer_pending(&trx->ts[2].lchan[0].ho.t3105))
+
+	/* indicate frame */
+	handover_frame(&trx->ts[2].lchan[0]);
+
+	/* expect T3105 not running */
+	OSMO_ASSERT(!osmo_timer_pending(&trx->ts[2].lchan[0].ho.t3105))
+
+	fprintf(stderr, "test 2: with timeout\n");
+
+	/* enable handover again */
+	lchan = &trx->ts[2].lchan[0];
+	lchan->ho.active = HANDOVER_ENABLED;
+	lchan->ho.ref = 23;
+	modify_count = 0;
+
+	/* send access burst with correct ref */
+	nl1sap.u.rach_ind.ra = 23;
+	l1sap_up(trx, &nl1sap);
+	OSMO_ASSERT(modify_count == 1);
+
+	/* expect PHYS INFO */
+	expect_phys_info(&trx->ts[2].lchan[0].lapdm_ch.lapdm_dcch);
+
+	/* expect exactly one HO.DET */
+	OSMO_ASSERT(msg = msgb_dequeue(&trx->rsl_link->tx_list));
+	rslh = msgb_l2(msg);
+	OSMO_ASSERT(rslh->c.msg_type == RSL_MT_HANDO_DET);
+	OSMO_ASSERT(!msgb_dequeue(&trx->rsl_link->tx_list));
+
+	for (i = 0; i < btsb->ny1 - 1; i++) {
+		/* expect T3105 running */
+		OSMO_ASSERT(osmo_timer_pending(&trx->ts[2].lchan[0].ho.t3105))
+
+		/* timeout T3105 */
+		gettimeofday(&trx->ts[2].lchan[0].ho.t3105.timeout, NULL);
+		osmo_select_main(0);
+
+		/* expect PHYS INFO */
+		expect_phys_info(&trx->ts[2].lchan[0].lapdm_ch.lapdm_dcch);
+	}
+
+	/* timeout T3105 */
+	gettimeofday(&trx->ts[2].lchan[0].ho.t3105.timeout, NULL);
+	osmo_select_main(0);
+
+	/* expect T3105 not running */
+	OSMO_ASSERT(!osmo_timer_pending(&trx->ts[2].lchan[0].ho.t3105))
+
+	/* expect exactly one CONN.FAIL */
+	OSMO_ASSERT(msg = msgb_dequeue(&trx->rsl_link->tx_list));
+	rslh = msgb_l2(msg);
+	OSMO_ASSERT(rslh->c.msg_type == RSL_MT_CONN_FAIL);
+	OSMO_ASSERT(!msgb_dequeue(&trx->rsl_link->tx_list));
+
+#if 0
+	while (!quit) {
+		log_reset_context();
+		osmo_select_main(0);
+	}
+#endif
+
+	printf("Success\n");
+
+	return 0;
+}
+
+void bts_model_abis_close(struct gsm_bts *bts)
+{
+}
+
+int bts_model_oml_estab(struct gsm_bts *bts)
+{
+	return 0;
+}
+
+int bts_model_l1sap_down(struct gsm_bts_trx *trx, struct osmo_phsap_prim *l1sap)
+{
+	int rc = 0;
+	uint8_t chan_nr;
+	uint8_t tn, ss;
+	struct gsm_lchan *lchan;
+	struct msgb *msg = l1sap->oph.msg;
+	struct osmo_phsap_prim nl1sap;
+
+	switch (OSMO_PRIM_HDR(&l1sap->oph)) {
+	case OSMO_PRIM(PRIM_MPH_INFO, PRIM_OP_REQUEST):
+		switch (l1sap->u.info.type) {
+		case PRIM_INFO_ACTIVATE:
+			chan_nr = l1sap->u.info.u.act_req.chan_nr;
+			tn = L1SAP_CHAN2TS(chan_nr);
+			ss = l1sap_chan2ss(chan_nr);
+			lchan = &trx->ts[tn].lchan[ss];
+
+			lchan_init_lapdm(lchan);
+
+			lchan_set_state(lchan, LCHAN_S_ACTIVE);
+
+			memset(&nl1sap, 0, sizeof(nl1sap));
+			osmo_prim_init(&nl1sap.oph, SAP_GSM_PH, PRIM_MPH_INFO, PRIM_OP_CONFIRM, NULL);
+			nl1sap.u.info.type = PRIM_INFO_ACTIVATE;
+			nl1sap.u.info.u.act_cnf.chan_nr = chan_nr;
+			return l1sap_up(trx, &nl1sap);
+		case PRIM_INFO_MODIFY:
+			modify_count++;
+			break;
+		default:
+			LOGP(DL1C, LOGL_NOTICE, "unknown MPH-INFO.req %d\n",
+				l1sap->u.info.type);
+			rc = -EINVAL;
+			goto done;
+		}
+		break;
+	default:
+		LOGP(DL1C, LOGL_NOTICE, "unknown prim %d op %d\n",
+		l1sap->oph.primitive, l1sap->oph.operation);
+		rc = -EINVAL;
+		goto done;
+	}
+
+done:
+	if (msg)
+		msgb_free(msg);
+	return rc;
+}
+
+int bts_model_check_oml(struct gsm_bts *bts, uint8_t msg_type, struct tlv_parsed *old_attr, struct tlv_parsed *new_attr, void *obj) { return 0; }
+int bts_model_apply_oml(struct gsm_bts *bts, struct msgb *msg, struct tlv_parsed *new_attr, int obj_kind, void *obj) { return 0; }
+int bts_model_opstart(struct gsm_bts *bts, struct gsm_abis_mo *mo, void *obj) { return 0; }
+int bts_model_chg_adm_state(struct gsm_bts *bts, struct gsm_abis_mo *mo, void *obj, uint8_t adm_state) { return 0; }
+int bts_model_init(struct gsm_bts *bts) { return 0; }
+int bts_model_trx_deact_rf(struct gsm_bts_trx *trx) { return 0; }
+int bts_model_trx_close(struct gsm_bts_trx *trx) { return 0; }
+void trx_get_hlayer1(void) {}
diff --git a/tests/handover/handover_test.ok b/tests/handover/handover_test.ok
new file mode 100644
index 00000000..35821117
--- /dev/null
+++ b/tests/handover/handover_test.ok
@@ -0,0 +1 @@
+Success
diff --git a/tests/testsuite.at b/tests/testsuite.at
index 9fbc356b..427a9792 100644
--- a/tests/testsuite.at
+++ b/tests/testsuite.at
@@ -24,3 +24,9 @@ AT_KEYWORDS([bursts])
 cat $abs_srcdir/bursts/bursts_test.ok > expout
 AT_CHECK([$abs_top_builddir/tests/bursts/bursts_test], [], [expout], [ignore])
 AT_CLEANUP
+
+AT_SETUP([handover])
+AT_KEYWORDS([handover])
+cat $abs_srcdir/handover/handover_test.ok > expout
+AT_CHECK([$abs_top_builddir/tests/handover/handover_test], [], [expout], [ignore])
+AT_CLEANUP