Change in osmo-ttcn3-hacks[master]: pcu: Introduce TC_mt_ping_pong

[pespin]

pespin has submitted this change. ( https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/17525 )

Change subject: pcu: Introduce TC_mt_ping_pong
......................................................................

pcu: Introduce TC_mt_ping_pong

Change-Id: I0cbf4ac78e4c89f21b8c2b92eba1783667501e64
---
M pcu/PCU_Tests_RAW.ttcn
1 file changed, 66 insertions(+), 0 deletions(-)

Approvals:
  Jenkins Builder: Verified
  laforge: Looks good to me, but someone else must approve
  fixeria: Looks good to me, approved



diff --git a/pcu/PCU_Tests_RAW.ttcn b/pcu/PCU_Tests_RAW.ttcn
index ab412c4..a9f60cd 100644
--- a/pcu/PCU_Tests_RAW.ttcn
+++ b/pcu/PCU_Tests_RAW.ttcn
@@ -1199,6 +1199,71 @@
 	f_tx_rlcmac_ul_block(ts_RLCMAC_DL_ACK_NACK(dl_block.data.mac_hdr.hdr_ext.tfi, ack_nack_desc), 0, sched_fn);
 }
 
+/* Test scenario where SGSN wants to send some data against MS and it is
+ * answered by the MS on PDCH, so TBFs for downlink and later for uplink are created.
+ */
+testcase TC_mt_ping_pong() runs on RAW_PCU_Test_CT {
+	var GsmRrMessage rr_imm_ass;
+	var PacketUlAssign ul_tbf_ass;
+	var PacketDlAssign dl_tbf_ass;
+	var RlcmacDlBlock dl_block;
+	var PCUIF_Message pcu_msg;
+	var octetstring data := f_rnd_octstring(10);
+	var boolean ok;
+	var uint32_t sched_fn;
+	var OCT4 tlli := '00000001'O;
+	var AckNackDescription ack_nack_desc := valueof(t_AckNackDescription_init);
+
+	/* Initialize NS/BSSGP side */
+	f_init_bssgp();
+
+	/* Initialize the PCU interface abstraction */
+	f_init_raw(testcasename());
+
+	/* Establish BSSGP connection to the PCU */
+	f_bssgp_establish();
+	f_bssgp_client_llgmm_assign('FFFFFFFF'O, tlli);
+
+	/* SGSN sends some DL data, PCU will page on CCCH (PCH) */
+	BSSGP[0].send(ts_BSSGP_DL_UD(tlli, data));
+	f_pcuif_rx_pch_imm_tbf_ass(rr_imm_ass);
+
+	ok := f_imm_ass_verify_dl_tbf_ass(rr_imm_ass, dl_tbf_ass);
+	if (not ok) {
+		setverdict(fail, "Immediate Assignment not a Downlink TBF");
+		mtc.stop;
+	}
+
+	/* Wait timer X2002 and DL block is available after CCCH IMM ASS: */
+	f_sleep(X2002);
+	f_rx_rlcmac_dl_block_exp_data(dl_block, sched_fn, data, 0);
+
+	/* ACK the DL block */
+	f_acknackdesc_ack_block(ack_nack_desc, dl_block.data.mac_hdr.hdr_ext.bsn, '1'B);
+	f_tx_rlcmac_ul_block(ts_RLCMAC_DL_ACK_NACK(dl_block.data.mac_hdr.hdr_ext.tfi, ack_nack_desc), 0, sched_fn);
+
+	/* Now MS wants to answer the DL data, Establish an Uplink TBF */
+	ok := f_establish_tbf(rr_imm_ass);
+	if (not ok) {
+		setverdict(fail, "Failed to establish TBF");
+		mtc.stop;
+	}
+	ok := f_imm_ass_verify_ul_tbf_ass(rr_imm_ass, ul_tbf_ass);
+	if (not ok) {
+		setverdict(fail, "Immediate Assignment not an Uplink TBF");
+		mtc.stop;
+	}
+
+	/* Send one UL block and make sure it is ACKED fine */
+	f_tx_rlcmac_ul_n_blocks(ul_tbf_ass, 1);
+	f_rx_rlcmac_dl_block_exp_ack_nack(dl_block, sched_fn);
+	/* DL ACK/NACK sets poll+rrbp requesting PACKET CONTROL ACK */
+	f_tx_rlcmac_ul_block(ts_RLCMAC_CTRL_ACK(tlli), 0, sched_fn);
+
+	/* UL block should be received in SGSN */
+	BSSGP[0].receive(tr_BSSGP_UL_UD(tlli, mp_gb_cfg.cell_id));
+}
+
 /* Verify that if PCU doesn't get an ACK for first DL block after IMM ASS, it
  * will retry by retransmitting both the IMM ASS + DL block after poll (ack)
  * timeout occurs (specified by sent RRBP on DL block). */
@@ -1437,6 +1502,7 @@
 	execute( TC_t3169() );
 	execute( TC_t3193() );
 	execute( TC_mo_ping_pong() );
+	execute( TC_mt_ping_pong() );
 	execute( TC_imm_ass_dl_block_retrans() );
 	execute( TC_paging_cs_from_bts() );
 	execute (TC_paging_cs_from_sgsn_sign() );

-- 
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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: I0cbf4ac78e4c89f21b8c2b92eba1783667501e64
Gerrit-Change-Number: 17525
Gerrit-PatchSet: 1
Gerrit-Owner: pespin <pespin at sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: fixeria <axilirator at gmail.com>
Gerrit-Reviewer: laforge <laforge at osmocom.org>
Gerrit-Reviewer: pespin <pespin at sysmocom.de>
Gerrit-MessageType: merged
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