Review at https://gerrit.osmocom.org/6581
sgsn: Add user plane GTP testing (GTP->Gb and Gb->GTP)
Change-Id: Ifd62cca8cd9dbcffe4eac957db210ac13b8c633f
---
M library/BSSGP_Emulation.ttcn
M library/LLC_Templates.ttcn
M sgsn/SGSN_Tests.ttcn
3 files changed, 139 insertions(+), 1 deletion(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks
refs/changes/81/6581/1
diff --git a/library/BSSGP_Emulation.ttcn b/library/BSSGP_Emulation.ttcn
index 9a48918..c4628be 100644
--- a/library/BSSGP_Emulation.ttcn
+++ b/library/BSSGP_Emulation.ttcn
@@ -702,6 +702,15 @@
sndcp := omit
}
+template BssgpDecoded tr_BD_SNDCP(template BIT4 sapi, template PDU_SN sn) := {
+ bssgp := ?,
+ llc := tr_LLC_UI(?, sapi),
+ l3_mo := omit,
+ l3_mt := omit,
+ sndcp := sn
+}
+
+
}
diff --git a/library/LLC_Templates.ttcn b/library/LLC_Templates.ttcn
index 7bc4088..086207c 100644
--- a/library/LLC_Templates.ttcn
+++ b/library/LLC_Templates.ttcn
@@ -20,6 +20,12 @@
pM := bool2bit(protected)
}
+template (value) Control_field_U ts_LLC_CtrlU(BIT4 m_bits, BIT1 p_f) := {
+ mBits := m_bits,
+ pF := p_f,
+ format := '111'B
+}
+
template Control_field_UI tr_LLC_CtrlUI(template uint9_t n_u,
template boolean encrypted := ?,
template boolean protected := ?) := {
@@ -29,6 +35,14 @@
e := bool2bit_tmpl(encrypted),
pM := bool2bit_tmpl(protected)
}
+
+template Control_field_U tr_LLC_CtrlU(template BIT4 m_bits := ?,
+ template BIT1 p_f := ?) := {
+ mBits := m_bits,
+ pF := p_f,
+ format := '111'B
+}
+
template PDU_LLC ts_LLC_UI(octetstring payload, BIT4 sapi, BIT1 cr, uint9_t
n_u,
boolean encrypted := false, boolean protected :=
false) := {
@@ -51,6 +65,19 @@
}
}
+template PDU_LLC tr_LLC_XID(template XID_Information xid, template BIT4 sapi
:= ?,
+ template BIT1 cr := ?, template BIT1 p_f := ?) := {
+ pDU_LLC_U := {
+ address_field := t_LLC_Addr(sapi, cr),
+ control_field := tr_LLC_CtrlU('1011'B, p_f),
+ information_field_U := {
+ xID := xid
+ },
+ fCS := '000000'O /* provided by decoder if FCS OK */
+ }
+}
+
+
const BIT4 c_LLC_SAPI_LLGMM := '0001'B;
const BIT4 c_LLC_SAPI_TOM2 := '0010'B;
const BIT4 c_LLC_SAPI_LL3 := '0011'B;
diff --git a/sgsn/SGSN_Tests.ttcn b/sgsn/SGSN_Tests.ttcn
index a02d3a9..f41817f 100644
--- a/sgsn/SGSN_Tests.ttcn
+++ b/sgsn/SGSN_Tests.ttcn
@@ -2,6 +2,7 @@
import from General_Types all;
import from Osmocom_Types all;
+import from Native_Functions all;
import from NS_Types all;
import from NS_Emulation all;
import from BSSGP_Types all;
@@ -781,7 +782,7 @@
octetstring sgsn_ip_u optional
};
-function f_pdp_ctx_act(PdpActPars apars) runs on BSSGP_ConnHdlr {
+function f_pdp_ctx_act(inout PdpActPars apars) runs on BSSGP_ConnHdlr {
var boolean exp_rej := ispresent(apars.exp_rej_cause);
var Gtp1cUnitdata g_ud;
@@ -795,6 +796,8 @@
apars.sgsn_tei_u :=
gtpc_rx.createPDPContextRequest.teidDataI.teidDataI;
apars.sgsn_ip_c :=
gtpc_rx.createPDPContextRequest.sgsn_addr_signalling.addressf;
apars.sgsn_ip_u :=
gtpc_rx.createPDPContextRequest.sgsn_addr_traffic.addressf;
+ f_gtp_register_teid(apars.ggsn_tei_c);
+ f_gtp_register_teid(apars.ggsn_tei_u);
var OCT1 cause := int2oct(128, 1);
GTP.send(ts_GTPC_CreatePdpResp(g_ud.peer, seq_nr,
apars.sgsn_tei_c, cause,
@@ -891,6 +894,85 @@
sgsn_ip_u := omit
}
+template (value) GtpPeer ts_GtpPeerU(octetstring ip) := {
+ connId := 1,
+ remName := f_inet_ntoa(ip),
+ remPort := GTP1U_PORT
+}
+
+template (value) GtpPeer ts_GtpPeerC(octetstring ip) := {
+ connId := 1,
+ remName := f_inet_ntoa(ip),
+ remPort := GTP1C_PORT
+}
+
+private function f_gtpu_send(inout PdpActPars apars, octetstring payload) runs
on BSSGP_ConnHdlr {
+ var GtpPeer peer := valueof(ts_GtpPeerU(apars.sgsn_ip_u));
+ GTP.send(ts_GTP1U_GPDU(peer, 0 /*seq*/, apars.sgsn_tei_u, payload));
+}
+
+private altstep as_xid(PdpActPars apars) runs on BSSGP_ConnHdlr {
+ [] BSSGP.receive(tr_BD_LLC(tr_LLC_XID(?, apars.sapi))) {
+ repeat;
+ }
+}
+
+template PDU_SN tr_SN_UD(template BIT4 nsapi, template octetstring payload) :=
{
+ pDU_SN_UNITDATA := {
+ nsapi := nsapi,
+ moreBit := ?,
+ snPduType := '1'B,
+ firstSegmentIndicator := ?,
+ spareBit := ?,
+ pcomp := ?,
+ dcomp := ?,
+ npduNumber := ?,
+ segmentNumber := ?,
+ npduNumberContinued := ?,
+ dataSegmentSnUnitdataPdu := payload
+ }
+}
+
+/* simple case: single segment, no compression */
+template (value) PDU_SN ts_SN_UD(BIT4 nsapi, octetstring payload) := {
+ pDU_SN_UNITDATA := {
+ nsapi := nsapi,
+ moreBit := '0'B,
+ snPduType := '1'B,
+ firstSegmentIndicator := '1'B,
+ spareBit := '0'B,
+ pcomp := '0000'B,
+ dcomp := '0000'B,
+ npduNumber := '0000'B,
+ segmentNumber := '0000'B,
+ npduNumberContinued := '00'O,
+ dataSegmentSnUnitdataPdu := payload
+ }
+}
+
+/* Transceive given 'payload' as MT message from GTP -> OsmoSGSN -> Gb */
+private function f_gtpu_xceive_mt(inout PdpActPars apars, octetstring payload)
runs on BSSGP_ConnHdlr {
+ /* Send PDU via GTP from our simulated GGSN to the SGSN */
+ f_gtpu_send(apars, payload);
+ /* Expect PDU via BSSGP/LLC on simulated PCU from SGSN */
+ alt {
+ [] as_xid(apars);
+ [] BSSGP.receive(tr_BD_SNDCP(apars.sapi, tr_SN_UD(apars.nsapi,
payload)));
+ }
+}
+
+private function f_gtpu_xceive_mo(inout PdpActPars apars, octetstring payload)
runs on BSSGP_ConnHdlr {
+ /* Send PDU via SNDCP/LLC/BSSGP/NS via simulated MS/PCU to the SGSN */
+ var GtpPeer peer := valueof(ts_GtpPeerU(apars.sgsn_ip_u));
+ var PDU_SN sndcp := valueof(ts_SN_UD(apars.nsapi, payload));
+ BSSGP.send(ts_LLC_UI(enc_PDU_SN(sndcp), apars.sapi, '0'B, 0));
+ f_gtpu_send(apars, payload);
+ /* Expect PDU via GTP from SGSN on simulated GGSN */
+ alt {
+ [] GTP.receive(tr_GTPU_GPDU(peer, apars.ggsn_tei_u, payload));
+ }
+}
+
private function f_TC_attach_pdp_act(charstring id) runs on BSSGP_ConnHdlr {
var PdpActPars apars := valueof(t_PdpActPars);
@@ -932,6 +1014,25 @@
vc_conn.done;
}
+/* ATTACH + PDP CTX ACT + user plane traffic */
+private function f_TC_attach_pdp_act_user(charstring id) runs on
BSSGP_ConnHdlr {
+ var PdpActPars apars := valueof(t_PdpActPars);
+
+ /* first perform regular attach */
+ f_TC_attach(id);
+ /* then activate PDP context */
+ f_pdp_ctx_act(apars);
+ /* then transceive a downlink PDU */
+ f_gtpu_xceive_mt(apars, '01020304'O);
+ f_gtpu_xceive_mo(apars, 'a1b2c3d4'O);
+}
+testcase TC_attach_pdp_act_user() runs on test_CT {
+ var BSSGP_ConnHdlr vc_conn;
+ f_init();
+ vc_conn := f_start_handler(refers(f_TC_attach_pdp_act_user),
testcasename(), g_gb[0], 19);
+ vc_conn.done;
+}
+
control {
@@ -952,6 +1053,7 @@
execute( TC_detach_poweroff() );
execute( TC_attach_pdp_act() );
execute( TC_pdp_act_unattached() );
+ execute( TC_attach_pdp_act_user() );
}
--
To view, visit https://gerrit.osmocom.org/6581
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Gerrit-MessageType: newchange
Gerrit-Change-Id: Ifd62cca8cd9dbcffe4eac957db210ac13b8c633f
Gerrit-PatchSet: 1
Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Owner: Harald Welte <lafo...@gnumonks.org>
