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authorHarald Welte <laforge@osmocom.org>2020-11-12 21:50:10 +0100
committerHarald Welte <laforge@osmocom.org>2020-11-16 13:36:07 +0100
commit225825235bb4d146dfa054b91bcc6643b3227aba (patch)
treef6bcda92b5d0b95111c206044dd01f22ea9eb09d
parentd0022668e953d6579e6d9ccbd0c47468781043a6 (diff)
FR/FRNET: Introduce simplistic simulation of UEslaforge/gbproxy
Let's start a number of per-UE/TLLI component on each BVC, and generate some uplink traffic with random-payload 512-byte LLC frames. The FRNET(SGSN) side simply ignores all of those by means of a CreateCallback. Change-Id: I1b25b4a650d831bb07e9623b76e6c3dcdd71ac88
-rw-r--r--fr-net/FRNET_Tests.ttcn7
-rw-r--r--fr/FR_Tests.ttcn75
2 files changed, 81 insertions, 1 deletions
diff --git a/fr-net/FRNET_Tests.ttcn b/fr-net/FRNET_Tests.ttcn
index 87b9bd7..94b32dc 100644
--- a/fr-net/FRNET_Tests.ttcn
+++ b/fr-net/FRNET_Tests.ttcn
@@ -43,6 +43,11 @@ type component test_CT {
var GbInstances g_gb;
};
+
+private function CreateCallback(BssgpBvci bvci, BssgpCellId cell_id, OCT4 tlli, BssgpDecoded dec) runs on BSSGP_BVC_CT {
+ /* simply ignore any inbound traffic for now */
+}
+
private function f_init_gb(inout GbInstance gb, charstring id, integer offset) runs on test_CT {
var charstring id_idx := id & int2str(offset);
gb.vc_NS := NS_CT.create(id_idx & "-NSemu");
@@ -66,7 +71,7 @@ function f_gen_bvc(integer base, integer idx) return BssgpBvcConfig {
cell_id := base + 600 + idx
},
depth := BSSGP_DECODE_DEPTH_LLC,
- create_cb := refers(BSSGP_Emulation.DefaultCreateCallback)
+ create_cb := refers(CreateCallback)
};
return bvc;
}
diff --git a/fr/FR_Tests.ttcn b/fr/FR_Tests.ttcn
index 9f9b70e..f3652a3 100644
--- a/fr/FR_Tests.ttcn
+++ b/fr/FR_Tests.ttcn
@@ -6,9 +6,11 @@ import from Osmocom_Gb_Types all;
import from NS_Emulation all;
import from BSSGP_Emulation all;
+import from LLC_Templates all;
modulepar {
integer mp_num_bvc := 10;
+ integer mp_num_ue_in_bvc := 10;
NSConfigurations mp_nsconfig := {
{
nsei := 123,
@@ -42,6 +44,7 @@ type record of BssgpCellId BssgpCellIds;
type component test_CT {
var GbInstances g_gb;
+ port BSSGP_CT_PROC_PT BSSGP_PROC[16];
};
private function f_init_gb(inout GbInstance gb, charstring id, integer offset) runs on test_CT {
@@ -50,6 +53,7 @@ private function f_init_gb(inout GbInstance gb, charstring id, integer offset) r
gb.vc_BSSGP := BSSGP_CT.create(id_idx & "-BSSGPemu");
connect(gb.vc_BSSGP:BSCP, gb.vc_NS:NS_SP);
gb.vc_NS.start(NSStart(mp_nsconfig[offset], id_idx));
+ connect(self:BSSGP_PROC[offset], gb.vc_BSSGP:PROC);
gb.vc_BSSGP.start(BssgpStart(gb.cfg, testcasename()));
}
@@ -72,6 +76,65 @@ function f_gen_bvc(integer base, integer idx) return BssgpBvcConfig {
return bvc;
}
+/***********************************************************************
+ * UE simulation component
+ ***********************************************************************/
+
+type component UE_CT extends BSSGP_Client_CT {
+ var UE_Pars g_pars;
+ timer g_Tguard;
+ var LLC_Entities llc;
+}
+
+type record UE_Pars {
+ hexstring imsi,
+ OCT4 tlli
+};
+
+type function void_fn(charstring id) runs on UE_CT;
+
+function f_handler_init(void_fn fn, charstring id, UE_Pars pars) runs on UE_CT {
+ g_pars := pars;
+ llc := f_llc_create(false);
+ f_bssgp_client_register(g_pars.imsi, g_pars.tlli);
+
+ fn.apply(id);
+ f_bssgp_client_unregister(g_pars.imsi);
+}
+
+function f_ul_ud(charstring id) runs on UE_CT {
+
+ log("Waiting for BVC-UNBLOCK");
+ alt {
+ [] BSSGP[0].receive(BssgpStatusIndication:{*,?,BVC_S_UNBLOCKED}) { }
+ [] BSSGP[0].receive { repeat; }
+ }
+
+ log ("Entering main loop");
+ while (true) {
+ var integer ran_index := 0;
+ //BSSGP[ran_index].send(ts_BSSGP_UL_UD(g_pars.tlli, g_pars.bssgp_cell_id[ran_index], llc_enc));
+ BSSGP[ran_index].send(ts_LLC_UI(f_rnd_octstring(512), '0000'B, '1'B, 0))
+ f_sleep(0.5);
+ }
+}
+
+function f_start_ue(void_fn fn, charstring id, GbInstance gb, integer imsi_suffix, BSSGP_BVC_CT bvc_comp, float t_guard := 30.0)
+runs on test_CT
+{
+ var UE_CT ue_comp;
+ var UE_Pars ue_pars := {
+ imsi := f_gen_imsi(imsi_suffix),
+ tlli := f_gprs_tlli_random()
+ };
+
+ ue_comp := UE_CT.create(id);
+ connect(ue_comp:BSSGP[0], bvc_comp:BSSGP_SP);
+ connect(ue_comp:BSSGP_SIG[0], bvc_comp:BSSGP_SP_SIG);
+ connect(ue_comp:BSSGP_PROC[0], bvc_comp:BSSGP_PROC);
+ ue_comp.start(f_handler_init(fn, id, ue_pars));
+}
+
testcase TC_foo() runs on test_CT {
@@ -85,8 +148,20 @@ testcase TC_foo() runs on test_CT {
for (var integer j := 0; j < mp_num_bvc; j := j+1) {
g_gb[i].cfg.bvc := g_gb[i].cfg.bvc & { f_gen_bvc(i * 1000, j) };
}
+ log("Initializing Gb interface ", i, ": NSEI=", g_gb[i].cfg.nsei);
f_init_gb(g_gb[i], "gb", i);
}
+ for (var integer i := 0; i < lengthof(mp_nsconfig); i := i+1) {
+ for (var integer j := 0; j < mp_num_bvc; j := j+1) {
+ var BSSGP_BVC_CT bvc_comp := f_bssgp_get_bvci_ct(g_gb[i].cfg.bvc[j].bvci, BSSGP_PROC[i]);
+ for (var integer k := 0; k < mp_num_ue_in_bvc; k := k+1) {
+ var charstring id := "gb" & int2str(i) & "-bvc" & int2str(g_gb[i].cfg.bvc[j].bvci) & "-UEsim" & int2str(k);
+ f_start_ue(refers(f_ul_ud), id, g_gb[i], i*10000+j*100+k, bvc_comp);
+ /* a bit of staggering to ensure the timers above don't run all at the same time */
+ f_sleep(0.05);
+ }
+ }
+ }
while (true) {
f_sleep(100.0);
}