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-rw-r--r--library/NS_RAW.ttcn227
1 files changed, 227 insertions, 0 deletions
diff --git a/library/NS_RAW.ttcn b/library/NS_RAW.ttcn
new file mode 100644
index 0000000..848f488
--- /dev/null
+++ b/library/NS_RAW.ttcn
@@ -0,0 +1,227 @@
+module NS_RAW {
+
+/* "RAW" NS utilities: Wrapper around several NS_CodecPort */
+
+import from General_Types all;
+import from Osmocom_Types all;
+import from GSM_Types all;
+import from GSM_RR_Types all;
+
+import from NS_Types all;
+import from BSSGP_Types all;
+import from Osmocom_Gb_Types all;
+
+import from IPL4asp_Types all;
+import from NS_CodecPort all;
+import from NS_CodecPort_CtrlFunct all;
+import from Native_Functions all;
+
+import from NS_Emulation all;
+import from BSSGP_Emulation all;
+
+type component RAW_NS_CT {
+ /* UDP port towards the bottom (IUT) */
+ port NS_CODEC_PT NSCP[4];
+ var ConnectionId g_ns_conn_id[4] := {-1, -1, -1, -1};
+ var NSConfiguration g_nsconfig[4];
+ timer g_T_guard;
+}
+
+private altstep as_Tguard() runs on RAW_NS_CT {
+ [] g_T_guard.timeout {
+ setverdict(fail, "Timeout of T_guard");
+ mtc.stop;
+ }
+}
+
+function f_init_ns_codec(NSConfiguration nsconfig, integer idx := 0, float guard_secs := 60.0)
+runs on RAW_NS_CT {
+ var Result res;
+
+ if (not g_T_guard.running) {
+ g_T_guard.start(guard_secs);
+ activate(as_Tguard());
+ }
+
+ if (not isbound(g_nsconfig) or not isbound(g_nsconfig[idx])) {
+ /* copy most parts from nsconfig */
+ g_nsconfig[idx] := nsconfig;
+/* FIXME */
+ /* adjust those parts different for each NS-VC */
+ g_nsconfig[idx].nsvci := nsconfig.nsvci + idx;
+ g_nsconfig[idx].local_udp_port := nsconfig.local_udp_port + idx;
+ }
+
+ map(self:NSCP[idx], system:NSCP);
+ /* Connect the UDP socket */
+ log("connecting NSCP[", idx, "] to ", g_nsconfig[idx]);
+ res := f_IPL4_connect(NSCP[idx], g_nsconfig[idx].remote_ip, g_nsconfig[idx].remote_udp_port,
+ g_nsconfig[idx].local_ip, g_nsconfig[idx].local_udp_port, 0, { udp := {}});
+ if (not ispresent(res.connId)) {
+ setverdict(fail, "Could not connect NS UDP socket, check your configuration ", g_nsconfig[idx]);
+ mtc.stop;
+ }
+ g_ns_conn_id[idx] := res.connId;
+
+}
+
+function f_ns_exp(template PDU_NS exp_rx, integer idx := 0) runs on RAW_NS_CT return PDU_NS {
+ var NS_RecvFrom nrf;
+ log("f_ns_exp() expecting ", exp_rx);
+ alt {
+ [] NSCP[idx].receive(t_NS_RecvFrom(exp_rx)) -> value nrf { }
+ [] NSCP[idx].receive {
+ setverdict(fail, "Received unexpected NS: ", nrf);
+ mtc.stop;
+ }
+ }
+ return nrf.msg;
+}
+
+/* perform outbound NS-ALIVE procedure */
+function f_outgoing_ns_alive(integer idx := 0) runs on RAW_NS_CT {
+ NSCP[idx].send(t_NS_Send(g_ns_conn_id[idx], t_NS_ALIVE));
+ alt {
+ [] NSCP[idx].receive(t_NS_RecvFrom(t_NS_ALIVE_ACK));
+ [] NSCP[idx].receive { repeat; }
+ }
+}
+
+/* perform outbound NS-ALIVE procedure */
+function f_outgoing_ns_alive_no_ack(integer idx := 0, float tout := 10.0) runs on RAW_NS_CT {
+ timer T := tout;
+ NSCP[idx].send(t_NS_Send(g_ns_conn_id[idx], t_NS_ALIVE));
+ T.start;
+ alt {
+ [] NSCP[idx].receive(t_NS_RecvFrom(t_NS_ALIVE_ACK)) {
+ setverdict(fail, "Received unexpected NS-ALIVE ACK");
+ }
+ [] NSCP[idx].receive { repeat; }
+ [] T.timeout {
+ setverdict(pass);
+ }
+ }
+}
+
+/* ensure no matching message is received within 'tout' */
+function f_ensure_no_ns(template PDU_NS ns := ?, integer idx := 0, float tout := 3.0)
+runs on RAW_NS_CT {
+ timer T := tout;
+ T.start;
+ alt {
+ [] NSCP[idx].receive(t_NS_RecvFrom(ns)) {
+ setverdict(fail, "NS-ALIVE from unconfigured (possibly initial) endpoint");
+ }
+ [] T.timeout {
+ setverdict(pass);
+ }
+ }
+}
+
+/* perform outbound NS-BLOCK procedure */
+function f_outgoing_ns_block(NsCause cause, integer idx := 0) runs on RAW_NS_CT {
+ NSCP[idx].send(t_NS_Send(g_ns_conn_id[idx], ts_NS_BLOCK(cause, g_nsconfig[idx].nsvci)));
+ alt {
+ [] NSCP[idx].receive(t_NS_RecvFrom(tr_NS_BLOCK_ACK(g_nsconfig[idx].nsvci)));
+ [] NSCP[idx].receive { repeat; }
+ }
+}
+
+/* receive NS-ALIVE and ACK it */
+altstep as_rx_alive_tx_ack(boolean oneshot := false, integer idx := 0) runs on RAW_NS_CT {
+ [] NSCP[idx].receive(t_NS_RecvFrom(t_NS_ALIVE)) {
+ NSCP[idx].send(t_NS_Send(g_ns_conn_id[idx], t_NS_ALIVE_ACK));
+ if (not oneshot) { repeat; }
+ }
+}
+
+/* Transmit BSSGP RESET for given BVCI and expect ACK */
+function f_tx_bvc_reset_rx_ack(BssgpBvci bvci, BssgpCellId cell_id, integer idx := 0, boolean exp_ack := true)
+runs on RAW_NS_CT {
+ var PDU_BSSGP bssgp_tx := valueof(ts_BVC_RESET(BSSGP_CAUSE_NET_SV_CAP_MOD_GT_ZERO_KBPS, bvci,
+ cell_id));
+ timer T := 5.0;
+ NSCP[idx].send(t_NS_Send(g_ns_conn_id[idx], ts_NS_UNITDATA(t_SduCtrlB, 0, enc_PDU_BSSGP(bssgp_tx))));
+ T.start;
+ alt {
+ [exp_ack] NSCP[idx].receive(t_NS_RecvFrom(tr_NS_UNITDATA(t_SduCtrlB, 0,
+ decmatch tr_BVC_RESET_ACK(bvci, ?)))) {
+ setverdict(pass);
+ }
+ [exp_ack] T.timeout {
+ setverdict(fail, "No response to BVC-RESET");
+ }
+ [not exp_ack] T.timeout {
+ setverdict(pass);
+ }
+ [] NSCP[idx].receive { repeat; }
+ }
+}
+
+/* Receive a BSSGP RESET for given BVCI and ACK it */
+altstep as_rx_bvc_reset_tx_ack(BssgpBvci bvci, BssgpCellId cell_id, boolean oneshot := false,
+ integer idx := 0)
+runs on RAW_NS_CT {
+ var NS_RecvFrom ns_rf;
+ /* FIXME: nail down received cell_id in match */
+ [] NSCP[idx].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, cell_id));
+ NSCP[idx].send(t_NS_Send(g_ns_conn_id[idx], 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, integer idx := 0) runs on RAW_NS_CT {
+ var NS_RecvFrom ns_rf;
+ [] NSCP[idx].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[idx].send(t_NS_Send(g_ns_conn_id[idx], 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, integer idx := 0) runs on RAW_NS_CT {
+ var NS_RecvFrom ns_rf;
+ [] NSCP[idx].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[idx].send(t_NS_Send(g_ns_conn_id[idx], ts_NS_UNITDATA(t_SduCtrlB, bvci, enc_PDU_BSSGP(bssgp_tx))));
+ if (not oneshot) { repeat; }
+ }
+}
+
+
+/* Receive a NS-RESET and ACK it */
+altstep as_rx_ns_reset_ack(boolean oneshot := false, integer idx := 0) runs on RAW_NS_CT {
+ var NS_RecvFrom ns_rf;
+ [] NSCP[idx].receive(t_NS_RecvFrom(tr_NS_RESET(NS_CAUSE_OM_INTERVENTION, g_nsconfig[idx].nsvci,
+ g_nsconfig[idx].nsei))) -> value ns_rf {
+ NSCP[idx].send(t_NS_Send(g_ns_conn_id[idx], ts_NS_RESET_ACK(g_nsconfig[idx].nsvci,
+ g_nsconfig[idx].nsei)));
+ if (not oneshot) { repeat; }
+ }
+}
+/* Receive a NS-UNBLOCK and ACK it */
+altstep as_rx_ns_unblock_ack(boolean oneshot := false, integer idx := 0) runs on RAW_NS_CT {
+ var NS_RecvFrom ns_rf;
+ [] NSCP[idx].receive(t_NS_RecvFrom(t_NS_UNBLOCK)) -> value ns_rf {
+ NSCP[idx].send(t_NS_Send(g_ns_conn_id[idx], t_NS_UNBLOCK_ACK));
+ if (not oneshot) { repeat; }
+ }
+}
+
+
+
+}