osmo-ttcn3-hacks/fr/FR_Tests.ttcn

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module FR_Tests {
import from General_Types all;
import from Osmocom_Types all;
import from Osmocom_Gb_Types all;
import from NS_Emulation all;
import from BSSGP_Emulation all;
import from LLC_Types all;
import from LLC_Templates all;
modulepar {
/* NS transport layer MTU (NS header and anything after it) */
integer mp_ns_mtu := 1500;
/* number of BVCs to bring up in one Gb instance */
integer mp_num_bvc := 10;
/* number of UEs to start in each PTP BVC */
integer mp_num_ue_in_bvc := 10;
/* NS configurations; one per NSE; each with any number of NSVC */
NSConfigurations mp_nsconfig := {
{
nsei := 123,
role_sgsn := false,
handle_sns := false,
nsvc := {
{
provider := {
fr := {
netdev := "hdlc1",
dlci := 21
}
},
nsvci := 101
}, {
provider := {
fr := {
netdev := "hdlc2",
dlci := 22
}
},
nsvci := 102
}, {
provider := {
fr := {
netdev := "hdlc3",
dlci := 23
}
},
nsvci := 103
}, {
provider := {
fr := {
netdev := "hdlc4",
dlci := 24
}
},
nsvci := 104
}
}
}
};
}
/* 4 bytes NS-UNITDATA,
* >= 12 Bytes DL-UNITDATA or 18 bytes BSSGP UL-UNITDATA
* 3 bytes LLC UI header
* 3 bytes LLC FCS
* <= 3 bytes optional padding
* --> at least 31 bytes required
*/
const integer c_LLC_BSSGP_NS_overhead := 40;
type record GbInstance {
NS_CT vc_NS,
BSSGP_CT vc_BSSGP,
BssgpConfig cfg
};
type record of GbInstance GbInstances;
type record of NSConfiguration NSConfigurations;
type record of BssgpCellId BssgpCellIds;
type component test_CT {
var GbInstances g_gb;
port BSSGP_CT_PROC_PT BSSGP_PROC[16];
};
/* initialize one Gb interface */
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");
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()));
}
/* generate a BVC dynamically, using distinct number ranges for BVCI, CID, LAC, ... */
private function f_gen_bvc(integer base, integer idx) return BssgpBvcConfig {
var BssgpBvcConfig bvc := {
bvci := base + 100 + idx,
cell_id := {
ra_id := {
lai := {
mcc_mnc := '262F42'H,
lac := base + 300 + idx
},
rac := 1
},
cell_id := base + 600 + idx
},
depth := BSSGP_DECODE_DEPTH_LLC,
create_cb := refers(BSSGP_Emulation.DefaultCreateCallback)
};
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 of UE_CT ro_ue;
type record UE_Pars {
hexstring imsi,
OCT4 tlli,
float tguard,
BssgpBvci bvci,
BssgpCellId cell_id
};
type function void_fn(charstring id) runs on UE_CT;
private altstep as_ue_tguard() runs on UE_CT {
[] g_Tguard.timeout {
setverdict(fail, "Tguard timeout after ", g_pars.tguard);
self.stop;
}
}
/* first function executed in UE_CT; creates LLC context, registers with BSSGP, starts Tguard */
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);
g_Tguard.start(g_pars.tguard);
activate(as_ue_tguard());
log(id, " Waiting for BVC-UNBLOCK");
timer T := 15.0;
T.start;
alt {
[] BSSGP[0].receive(BssgpStatusIndication:{*,?,BVC_S_UNBLOCKED}) { }
[] BSSGP[0].receive { repeat; }
[] T.timeout {
setverdict(fail, id, " Timeout waiting for BVC-UNBLOCK");
self.stop;
}
}
log (id, " Entering main loop");
fn.apply(id);
log (id, "Leaving main loop");
f_bssgp_client_unregister(g_pars.imsi);
}
/* start a single UE component; connect it to BSSGP */
function f_start_ue(void_fn fn, charstring id, BssgpBvcConfig bvc, integer imsi_suffix, BSSGP_BVC_CT bvc_comp, float t_guard := 40.0)
runs on test_CT return UE_CT
{
var UE_CT ue_comp;
var UE_Pars ue_pars := {
imsi := f_gen_imsi(imsi_suffix),
tlli := f_gprs_tlli_random(),
tguard := t_guard,
bvci := bvc.bvci,
cell_id := bvc.cell_id
};
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));
return ue_comp;
}
/* main test case body function; start Gb instances, start UE_CTs on top; wait for termination */
private function f_tc_body(void_fn ue_fn, integer ue_per_bvc := mp_num_ue_in_bvc,
float delay_between_ue := 0.005, float ue_tguard := 40.0) runs on test_CT {
var ro_ue ues := {};
for (var integer i := 0; i < lengthof(mp_nsconfig); i := i+1) {
g_gb[i].cfg := {
nsei := mp_nsconfig[i].nsei,
sgsn_role := false,
bvc := { }
};
/* create 'mp_num_bvc' number of BVCs */
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 < ue_per_bvc; k := k+1) {
var charstring id := "gb" & int2str(i) & "-bvc" & int2str(g_gb[i].cfg.bvc[j].bvci) & "-UEsim" & int2str(k);
var UE_CT ue;
ue := f_start_ue(ue_fn, id, g_gb[i].cfg.bvc[j], i*10000+j*100+k, bvc_comp,
ue_tguard);
ues := ues & { ue };
/* a bit of staggering to ensure the timers above don't run all at the same time */
f_sleep(delay_between_ue);
/* FIXME: as the BSSGP emulation is already running, we must not
* take too long to start the UE components. If we do, the
* BVC_S_UNBLOCKED notification will arrive before the components
* all are running, meaning we never get that one :( */
}
}
}
/* wait for all UE components to terminate */
for (var integer i := 0; i < lengthof(ues); i := i + 1) {
ues[i].done;
}
setverdict(pass);
}
private function f_ul_ud(charstring id) runs on UE_CT
{
for (var integer num_pkts := 0; num_pkts < 50; num_pkts := num_pkts + 1) {
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);
/* 512 bytes + 32 bytes HDR every 0.5s (1088/s) means about 8704/s per UE */
/* at 100 UE that ends up about 870 kBps */
}
}
/* Generate uplink-unitdata traffic */
testcase TC_ul_ud() runs on test_CT
{
f_tc_body(refers(f_ul_ud));
}
/* test bring-up of all BVCs */
private function f_pass(charstring id) runs on UE_CT
{
setverdict(pass);
}
testcase TC_bvc_bringup() runs on test_CT
{
f_tc_body(refers(f_pass), ue_per_bvc := 1, ue_tguard := 20.0);
}
private function f_ul2dl_ud(charstring id) runs on UE_CT
{
var integer max_llc_payload_len := mp_ns_mtu - c_LLC_BSSGP_NS_overhead;
for (var integer num_pkts := 0; num_pkts < 50; num_pkts := num_pkts + 1) {
var integer ran_index := 0;
var template (value) PDU_LLC llc_tx;
var template (present) PDU_LLC llc_rx_exp;
var octetstring llc_payload := f_rnd_octstring(f_rnd_int(max_llc_payload_len));
var PDU_LLC llc_rx;
timer T := 5.0;
/* SAPI '0010'B is looped back by FRNET_Tests.ttcn */
llc_tx := ts_LLC_UI(llc_payload, '0010'B, '1'B, 0);
llc_rx_exp := llc_tx;
llc_rx_exp.pDU_LLC_UI.fCS := ?;
//BSSGP[ran_index].send(ts_BSSGP_UL_UD(g_pars.tlli, g_pars.cell_id, llc_enc));
BSSGP[ran_index].send(llc_tx);
T.start;
alt {
[] BSSGP[ran_index].receive(llc_rx_exp) -> value llc_rx { }
[] BSSGP[ran_index].receive(PDU_LLC:?) -> value llc_rx {
setverdict(fail, "Unexpected LLC: ", llc_rx);
break;
}
[] T.timeout {
setverdict(fail, "Timeout waiting for ", llc_rx_exp);
break;
}
}
//f_sleep(0.1);
/* 512 bytes + 32 bytes HDR every 0.5s (1088/s) means about 8704/s per UE */
/* at 100 UE that ends up about 870 kBps */
}
}
/* Generate uplink-unitdata traffic */
testcase TC_ul2dl_ud() runs on test_CT
{
f_tc_body(refers(f_ul2dl_ud), ue_tguard := 100.0);
}
control {
execute( TC_bvc_bringup() );
execute( TC_ul_ud() );
execute( TC_ul2dl_ud() );
}
}