Harald Welte has uploaded this change for review. (
https://gerrit.osmocom.org/12984
Change subject: PCU: Tests for the BSS/PCU side NS/BSSGP implementations
......................................................................
PCU: Tests for the BSS/PCU side NS/BSSGP implementations
The existing (unused) PCU_Tests are operating on top of a NS + BSSGP
emulation, i.e. they're aimed at testing higher protocol layers. Also,
they required BTS+BSC to run next to the PCU.
The new PCU_Tests_RAW introduced in this patch are the exact opposite:
* they test the PCU alone (attach to PCUIF and Gb interface)
* they don't require BTS or BSC to run
* they don't use NS + BSSGP emulation but raw NS/BSSGP frames to
test the very NS/BSSGP implementation inside of OsmoPCU.
Change-Id: I7ad76b96974cf0a686ad0f00ccd09d1a9df8b4d5
---
M pcu/PCU_Tests.cfg
A pcu/PCU_Tests_RAW.ttcn
M pcu/gen_links.sh
3 files changed, 372 insertions(+), 0 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks
refs/changes/84/12984/1
diff --git a/pcu/PCU_Tests.cfg b/pcu/PCU_Tests.cfg
index 5975290..17d5448 100644
--- a/pcu/PCU_Tests.cfg
+++ b/pcu/PCU_Tests.cfg
@@ -33,6 +33,7 @@
[TESTPORT_PARAMETERS]
*.*.udpReuseAddress := "yes";
+*.PCU.socket_type := "SEQPACKET"
[MAIN_CONTROLLER]
diff --git a/pcu/PCU_Tests_RAW.ttcn b/pcu/PCU_Tests_RAW.ttcn
new file mode 100644
index 0000000..50d9d0e
--- /dev/null
+++ b/pcu/PCU_Tests_RAW.ttcn
@@ -0,0 +1,370 @@
+module PCU_Tests_RAW {
+
+/* "RAW" PCU tests: Talk directly to the PCU socket of OsmoPCU on the one hand
side (emulating
+ the BTS/BSC side PCU socket server) and the Gb interface on the other hand
side. No NS/BSSGP
+ Emulation is used; rather, we simply use the NS_CodecPort to implement both
standard and non-
+ standard procedures on the NS and BSSGP level. The goal of these tests is
to test exactly
+ those NS and BSSGP implementations on the BSS (PCU) side. */
+
+import from General_Types all;
+import from Osmocom_Types all;
+import from NS_Types all;
+import from BSSGP_Types all;
+import from Osmocom_Gb_Types all;
+
+import from BSSGP_Emulation all; /* BssgpConfig */
+import from NS_Emulation all; /* NSConfiguration */
+
+import from UD_Types all;
+import from PCUIF_Types all;
+import from PCUIF_CodecPort all;
+import from IPL4asp_Types all;
+import from NS_CodecPort all;
+import from NS_CodecPort_CtrlFunct all;
+import from Native_Functions all;
+import from PCU_Tests all;
+
+
+type component RAW_NS_CT {
+ /* UDP port towards the bottom (IUT) */
+ port NS_CODEC_PT NSCP;
+ var ConnectionId g_ns_conn_id := -1;
+
+ /* PCUIF (we emulate the BTS part) */
+ port PCUIF_CODEC_PT PCU;
+ var ConnectionId g_pcu_conn_id := -1;
+}
+
+function f_init_pcuif() runs on RAW_NS_CT {
+ map(self:PCU, system:PCU);
+
+ /* Connect the Unix Domain Socket */
+ g_pcu_conn_id := f_pcuif_listen(PCU, PCU_SOCK_DEFAULT);
+ PCU.receive(UD_connected:?);
+
+ /* Wait for PCU_VERSION and return INFO_IND */
+ PCU.receive(t_SD_PCUIF(g_pcu_conn_id, tr_PCUIF_TXT_IND(0, PCU_VERSION,
?)));
+ /* FIXME: make sure to use parameters from mp_gb_cfg.cell_id in the PCU
INFO IND */
+ var template PCUIF_Message info_ind := ts_PCUIF_INFO_IND(bts_nr := 0,
+ nsei :=
mp_nsconfig.nsei,
+ nsvci :=
mp_nsconfig.nsvci,
+ bvci :=
mp_gb_cfg.bvci,
+ local_port :=
mp_nsconfig.remote_udp_port,
+ remote_port :=
mp_nsconfig.local_udp_port,
+ remote_ip :=
f_inet_haddr(mp_nsconfig.remote_ip)
+ );
+ PCU.send(t_SD_PCUIF(g_pcu_conn_id, info_ind));
+}
+
+function f_init_ns_codec() runs on RAW_NS_CT {
+ var Result res;
+ map(self:NSCP, system:NSCP);
+ /* Connect the UDP socket */
+ res := f_IPL4_connect(NSCP, mp_nsconfig.remote_ip,
mp_nsconfig.remote_udp_port,
+ mp_nsconfig.local_ip,
mp_nsconfig.local_udp_port,
+ 0, { udp := {}});
+ if (not ispresent(res.connId)) {
+ setverdict(fail, "Could not connect NS UDP socket, check your
configuration");
+ mtc.stop;
+ }
+ g_ns_conn_id := res.connId;
+ /* FIXME: start guard timer */
+}
+
+function f_ns_exp(template PDU_NS exp_rx) runs on RAW_NS_CT return PDU_NS {
+ var NS_RecvFrom nrf;
+ log("f_ns_exp() expecting ", exp_rx);
+ alt {
+ [] NSCP.receive(t_NS_RecvFrom(exp_rx)) -> value nrf { }
+ [] NSCP.receive {
+ setverdict(fail, "Received unexpected NS: ", nrf);
+ mtc.stop;
+ }
+ }
+ return nrf.msg;
+}
+
+/* perform inbound SNS-SIZE procedure */
+function f_incoming_sns_size(template (omit) NsCause cause := omit) runs on
RAW_NS_CT {
+ var PDU_NS rx;
+ /* expect one single SNS-SIZE with RESET flag; one remote v4 EP; no v6
EP */
+ rx := f_ns_exp(tr_SNS_SIZE(mp_nsconfig.nsei, rst_flag := true,
max_nsvcs := ?,
+ num_v4 := 1, num_v6 := omit));
+ NSCP.send(t_NS_Send(g_ns_conn_id, ts_SNS_SIZE_ACK(mp_nsconfig.nsei,
cause)));
+}
+
+/* perform outbound SNS-SIZE procedure */
+function f_outgoing_sns_size(template (omit) NsCause cause := omit) runs on
RAW_NS_CT {
+ var PDU_NS rx;
+ NSCP.send(t_NS_Send(g_ns_conn_id, ts_SNS_SIZE(mp_nsconfig.nsei,
rst_flag := true, max_nsvcs := 1,
+ num_v4 := 1, num_v6 :=
omit)
+ ));
+ /* expect one single SNS-SIZE with RESET flag; one remote v4 EP; no v6
EP */
+ rx := f_ns_exp(tr_SNS_SIZE_ACK(mp_nsconfig.nsei, cause));
+}
+
+/* perform inbound SNS-CONFIG procedure */
+function f_incoming_sns_config(template (omit) NsCause cause := omit) runs on
RAW_NS_CT {
+ var PDU_NS rx;
+ rx := f_ns_exp(tr_SNS_CONFIG(mp_nsconfig.nsei, end_flag := true, v4 :=
?));
+ NSCP.send(t_NS_Send(g_ns_conn_id, ts_SNS_CONFIG_ACK(mp_nsconfig.nsei,
cause)));
+}
+
+/* perform outbound SNS-CONFIG procedure */
+function f_outgoing_sns_config(template (omit) NsCause cause := omit) runs on
RAW_NS_CT {
+ var PDU_NS rx;
+ var template (omit) IP4_Elements v4 := {
ts_SNS_IPv4(mp_nsconfig.local_ip,
+
mp_nsconfig.local_udp_port) }
+ NSCP.send(t_NS_Send(g_ns_conn_id, ts_SNS_CONFIG(mp_nsconfig.nsei, true,
v4)));
+ rx := f_ns_exp(tr_SNS_CONFIG_ACK(mp_nsconfig.nsei, cause));
+}
+
+/* perform outbound NS-ALIVE procedure */
+function f_outgoing_ns_alive() runs on RAW_NS_CT {
+ NSCP.send(t_NS_Send(g_ns_conn_id, t_NS_ALIVE));
+ alt {
+ [] NSCP.receive(t_NS_RecvFrom(t_NS_ALIVE_ACK));
+ [] NSCP.receive { repeat; }
+ }
+}
+
+/* perform outbound NS-BLOCK procedure */
+function f_outgoing_ns_block(NsCause cause) runs on RAW_NS_CT {
+ NSCP.send(t_NS_Send(g_ns_conn_id, ts_NS_BLOCK(cause,
mp_nsconfig.nsvci)));
+ alt {
+ [] NSCP.receive(t_NS_RecvFrom(tr_NS_BLOCK_ACK(mp_nsconfig.nsvci)));
+ [] NSCP.receive { repeat; }
+ }
+}
+
+/* receive NS-ALIVE and ACK it */
+altstep as_rx_alive_tx_ack(boolean oneshot := false) runs on RAW_NS_CT {
+ [] NSCP.receive(t_NS_RecvFrom(t_NS_ALIVE)) {
+ NSCP.send(t_NS_Send(g_ns_conn_id, t_NS_ALIVE_ACK));
+ if (not oneshot) { repeat; }
+ }
+}
+
+/* Receive a BSSGP RESET for given BVCI and ACK it */
+altstep as_rx_bvc_reset_tx_ack(BssgpBvci bvci, boolean oneshot := false) runs
on RAW_NS_CT {
+ var NS_RecvFrom ns_rf;
+ /* FIXME: nail down received cell_id in match */
+ [] NSCP.receive(t_NS_RecvFrom(tr_NS_UNITDATA(t_SduCtrlB, 0,
+ decmatch tr_BVC_RESET(?,
bvci, ?))))
+ -> value ns_rf {
+ var PDU_BSSGP bssgp_rx :=
dec_PDU_BSSGP(ns_rf.msg.pDU_NS_Unitdata.nS_SDU);
+ var PDU_BSSGP bssgp_tx := valueof(ts_BVC_RESET_ACK(bvci,
mp_gb_cfg.cell_id));
+ NSCP.send(t_NS_Send(g_ns_conn_id, ts_NS_UNITDATA(t_SduCtrlB, 0,
enc_PDU_BSSGP(bssgp_tx))));
+ if (not oneshot) { repeat; }
+ }
+}
+
+
+/* Receive a BSSGP UNBLOCK for given BVCI and ACK it */
+altstep as_rx_bvc_unblock_tx_ack(BssgpBvci bvci, boolean oneshot := false)
runs on RAW_NS_CT {
+ var NS_RecvFrom ns_rf;
+ [] NSCP.receive(t_NS_RecvFrom(tr_NS_UNITDATA(t_SduCtrlB, 0,
+ decmatch
t_BVC_UNBLOCK(bvci))))
+ -> value ns_rf {
+ var PDU_BSSGP bssgp_rx :=
dec_PDU_BSSGP(ns_rf.msg.pDU_NS_Unitdata.nS_SDU);
+ var PDU_BSSGP bssgp_tx := valueof(t_BVC_UNBLOCK_ACK(bvci));
+ NSCP.send(t_NS_Send(g_ns_conn_id, ts_NS_UNITDATA(t_SduCtrlB, 0,
enc_PDU_BSSGP(bssgp_tx))));
+ if (not oneshot) { repeat; }
+ }
+}
+
+/* Receive a BSSGP FLOW-CONTROL-BVC and ACK it */
+altstep as_rx_bvc_fc_tx_ack(BssgpBvci bvci, boolean oneshot := false) runs on
RAW_NS_CT {
+ var NS_RecvFrom ns_rf;
+ [] NSCP.receive(t_NS_RecvFrom(tr_NS_UNITDATA(t_SduCtrlB, bvci,
+ decmatch tr_BVC_FC_BVC)))
+ -> value ns_rf {
+ var PDU_BSSGP bssgp_rx :=
dec_PDU_BSSGP(ns_rf.msg.pDU_NS_Unitdata.nS_SDU);
+ var OCT1 tag :=
bssgp_rx.pDU_BSSGP_FLOW_CONTROL_BVC.tag.unstructured_Value;
+ var PDU_BSSGP bssgp_tx := valueof(t_BVC_FC_BVC_ACK(tag));
+ NSCP.send(t_NS_Send(g_ns_conn_id, ts_NS_UNITDATA(t_SduCtrlB,
bvci, enc_PDU_BSSGP(bssgp_tx))));
+ if (not oneshot) { repeat; }
+ }
+}
+
+/**********************************************************************************
+ * Classic Gb/IP bring-up test cases using NS-{RESET,BLOCK,UNBLOCK} and no
IP-SNS *
+
**********************************************************************************/
+
+/* Receive a NS-RESET and ACK it */
+private altstep as_rx_ns_reset_ack(boolean oneshot := false) runs on RAW_NS_CT
{
+ var NS_RecvFrom ns_rf;
+ [] NSCP.receive(t_NS_RecvFrom(tr_NS_RESET(NS_CAUSE_OM_INTERVENTION,
mp_nsconfig.nsvci,
+ mp_nsconfig.nsei))) -> value
ns_rf {
+ NSCP.send(t_NS_Send(g_ns_conn_id,
ts_NS_RESET_ACK(mp_nsconfig.nsvci, mp_nsconfig.nsei)));
+ if (not oneshot) { repeat; }
+ }
+}
+/* Receive a NS-UNBLOCK and ACK it */
+private altstep as_rx_ns_unblock_ack(boolean oneshot := false) runs on
RAW_NS_CT {
+ var NS_RecvFrom ns_rf;
+ [] NSCP.receive(t_NS_RecvFrom(t_NS_UNBLOCK)) -> value ns_rf {
+ NSCP.send(t_NS_Send(g_ns_conn_id, t_NS_UNBLOCK_ACK));
+ if (not oneshot) { repeat; }
+ }
+}
+
+/* test the NS-RESET procedure */
+testcase TC_ns_reset() runs on RAW_NS_CT {
+ f_init_ns_codec();
+ f_init_pcuif();
+
+
+ /* Expect inbound NS-RESET procedure */
+ as_rx_ns_reset_ack();
+ setverdict(pass);
+}
+
+/* ensure NS-RESET are re-transmitted */
+testcase TC_ns_reset_retrans() runs on RAW_NS_CT {
+ f_init_ns_codec();
+ f_init_pcuif();
+
+ var integer i;
+ for (i := 0; i < 3; i := i+1) {
+ NSCP.receive(t_NS_RecvFrom(tr_NS_RESET(NS_CAUSE_OM_INTERVENTION,
+ mp_nsconfig.nsvci,
mp_nsconfig.nsei)));
+ }
+
+ /* Expect inbound NS-RESET procedure */
+ as_rx_ns_reset_ack(oneshot := true);
+ setverdict(pass);
+}
+
+/* test the inbound NS-ALIVE procedure after NS-RESET */
+testcase TC_ns_alive() runs on RAW_NS_CT {
+ f_init_ns_codec();
+ f_init_pcuif();
+
+ /* Expect inbound NS-RESET procedure */
+ as_rx_ns_reset_ack(oneshot := true);
+
+ /* wait for one ALIVE cycle, then ACK any further ALIVE in the
background */
+ as_rx_alive_tx_ack(oneshot := true);
+ setverdict(pass);
+}
+
+/* Test for NS-RESET after NS-ALIVE timeout */
+testcase TC_ns_alive_timeout_reset() runs on RAW_NS_CT {
+ f_init_ns_codec();
+ f_init_pcuif();
+
+ /* Expect inbound NS-RESET procedure */
+ as_rx_ns_reset_ack(oneshot := true);
+
+ /* wait for at least one NS-ALIVE */
+ NSCP.receive(t_NS_RecvFrom(t_NS_ALIVE));
+
+ /* wait for NS-RESET to re-appear, ignoring any NS-ALIVE until then */
+ alt {
+ [] as_rx_ns_reset_ack(oneshot := true) { setverdict(pass); }
+ [] NSCP.receive(t_NS_RecvFrom(t_NS_ALIVE)) { repeat; }
+ }
+}
+
+/* test for NS-RESET/NS-ALIVE/NS-UNBLOCK */
+testcase TC_ns_unblock() runs on RAW_NS_CT {
+ f_init_ns_codec();
+ f_init_pcuif();
+
+ /* Expect inbound NS-RESET procedure */
+ as_rx_ns_reset_ack(oneshot := true);
+
+ /* wait for one ALIVE cycle, then ACK any further ALIVE in the
background */
+ as_rx_alive_tx_ack(oneshot := true);
+ activate(as_rx_alive_tx_ack());
+
+ as_rx_ns_unblock_ack(oneshot := true);
+ setverdict(pass);
+}
+
+/* test for NS-UNBLOCK re-transmissions */
+testcase TC_ns_unblock_retrans() runs on RAW_NS_CT {
+ f_init_ns_codec();
+ f_init_pcuif();
+
+ /* Expect inbound NS-RESET procedure */
+ as_rx_ns_reset_ack(oneshot := true);
+
+ /* wait for one ALIVE cycle, then ACK any further ALIVE in the
background */
+ as_rx_alive_tx_ack(oneshot := true);
+ activate(as_rx_alive_tx_ack());
+
+ /* wait for first NS-UNBLOCK, don't respond */
+ NSCP.receive(t_NS_RecvFrom(t_NS_UNBLOCK));
+
+ /* wait for re-transmission of NS-UNBLOCK */
+ as_rx_ns_unblock_ack(oneshot := true);
+ setverdict(pass);
+}
+
+/* full bring-up of the Gb link for NS and BSSGP layer up to BVC-FC */
+testcase TC_ns_full_bringup() runs on RAW_NS_CT {
+ f_init_ns_codec();
+ f_init_pcuif();
+
+ /* Expect inbound NS-RESET procedure */
+ as_rx_ns_reset_ack(oneshot := true);
+
+ /* wait for one ALIVE cycle, then ACK any further ALIVE in the
background */
+ as_rx_alive_tx_ack(oneshot := true);
+ activate(as_rx_alive_tx_ack());
+
+ as_rx_ns_unblock_ack(oneshot := true);
+
+ f_outgoing_ns_alive();
+
+ /* Expect BVC-RESET for signaling (0) and ptp BVCI */
+ as_rx_bvc_reset_tx_ack(0, oneshot := true);
+ as_rx_bvc_reset_tx_ack(mp_gb_cfg.bvci, oneshot := true);
+ as_rx_bvc_unblock_tx_ack(mp_gb_cfg.bvci, oneshot := true);
+
+ /* wait for one FLOW-CONTROL BVC and then ACK any further in the future
*/
+ as_rx_bvc_fc_tx_ack(mp_gb_cfg.bvci, oneshot := true);
+ activate(as_rx_bvc_fc_tx_ack(mp_gb_cfg.bvci));
+ setverdict(pass);
+}
+
+/* test outbound (SGSN-originated) NS-BLOCK procedure */
+testcase TC_ns_so_block() runs on RAW_NS_CT {
+ f_init_ns_codec();
+ f_init_pcuif();
+
+ /* Expect inbound NS-RESET procedure */
+ as_rx_ns_reset_ack(oneshot := true);
+
+ /* wait for one ALIVE cycle, then ACK any further ALIVE in the
background */
+ as_rx_alive_tx_ack(oneshot := true);
+ activate(as_rx_alive_tx_ack());
+
+ as_rx_ns_unblock_ack(oneshot := true);
+
+ f_outgoing_ns_alive();
+
+ f_outgoing_ns_block(NS_CAUSE_EQUIPMENT_FAILURE);
+ setverdict(pass);
+}
+
+
+control {
+ execute( TC_ns_reset() );
+ execute( TC_ns_reset_retrans() );
+ execute( TC_ns_alive() );
+ execute( TC_ns_alive_timeout_reset() );
+ execute( TC_ns_unblock() );
+ execute( TC_ns_unblock_retrans() );
+ execute( TC_ns_full_bringup() );
+ execute( TC_ns_so_block() );
+}
+
+
+
+
+
+
+}
diff --git a/pcu/gen_links.sh b/pcu/gen_links.sh
index 6e549eb..f9f6dd5 100755
--- a/pcu/gen_links.sh
+++ b/pcu/gen_links.sh
@@ -50,6 +50,7 @@
FILES+="NS_Emulation.ttcn NS_CodecPort.ttcn NS_CodecPort_CtrlFunct.ttcn
NS_CodecPort_CtrlFunctDef.cc "
FILES+="BSSGP_Emulation.ttcn Osmocom_Gb_Types.ttcn "
FILES+="LLC_Templates.ttcn L3_Templates.ttcn L3_Common.ttcn "
+FILES+="PCUIF_Types.ttcn PCUIF_CodecPort.ttcn "
gen_links $DIR $FILES
ignore_pp_results
--
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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I7ad76b96974cf0a686ad0f00ccd09d1a9df8b4d5
Gerrit-Change-Number: 12984
Gerrit-PatchSet: 1
Gerrit-Owner: Harald Welte <[email protected]>
