ttcn3
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osmo-ttcn3-hacks
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osmo-ttcn3-hacks/gprs_gb/Test.ttcn

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module Test {
import from General_Types all;
import from Osmocom_Types all;
import from GSM_Types all;
import from GSM_RR_Types all;
import from Osmocom_Gb_Types all;
import from BSSGP_Types all;
import from BSSGP_Emulation all;
import from NS_Types all;
import from NS_Emulation all;
import from LLC_Types all;
import from LLC_Templates all;
import from RLCMAC_Types all;
import from RLCMAC_CSN1_Types all;
import from LAPDm_RAW_PT all;
modulepar {
BssgpConfig mp_gb_cfg := {
nsei := 1234,
bvci := 1234,
cell_id := {
ra_id := {
lai := {
mcc_mnc := '26242F'H, lac := 13135
},
rac := 0
},
cell_id := 20960
},
sgsn_role := true
};
}
type record MmContext {
hexstring imsi optional,
GprsTlli tlli,
uint9_t n_u
};
type component dummy_CT extends BSSGP_Client_CT {
var lapdm_CT lapdm_component;
port LAPDm_PT L1;
var NS_CT ns_component;
var BSSGP_CT bssgp_component;
var MmContext g_mmctx := {
tlli := 'FFFFFFFF'O,
n_u := 0
};
var boolean g_initialized := false;
}
function f_init() runs on dummy_CT {
if (g_initialized == true) {
return;
}
g_initialized := true;
/* create a new NS component */
ns_component := NS_CT.create;
bssgp_component := BSSGP_CT.create;
/* connect our BSSGP port to the BSSGP Emulation */
connect(self:BSSGP, bssgp_component:BSSGP_SP);
connect(self:BSSGP_PROC, bssgp_component:BSSGP_PROC);
/* connect lower-end of BSSGP with BSSGP_CODEC_PORT (maps to NS_PT*/
connect(bssgp_component:BSCP, ns_component:NS_SP);
/* connect lower-end of NS emulation to NS_CODEC_PORT (on top of IPl4) */
map(ns_component:NSCP, system:NS_CODEC_PORT);
ns_component.start(NSStart());
bssgp_component.start(BssgpStart(mp_gb_cfg));
lapdm_component := lapdm_CT.create;
connect(self:L1, lapdm_component:LAPDM_SP);
map(lapdm_component:L1CTL, system:L1CTL);
lapdm_component.start(LAPDmStart());
}
function f_bssgp_dec_and_log(in octetstring inp) {
log("BSSGP Input: ", inp);
var PDU_BSSGP dec := dec_PDU_BSSGP(inp);
log("BSSGP Decoded: ", dec);
}
testcase TC_selftest_bssgp() runs on dummy_CT {
const octetstring c_bvc_reset_pcu := '2204820000078108088832f44000c80051e0'O;
const octetstring c_bvc_reset_q := '2204820000078100'O;
const octetstring c_status_pcu := '4107810515882204820000078103'O;
const octetstring c_reset_ack_q := '2304820000'O;
const octetstring c_reset_ack_pcu := '23048200c4'O;
const octetstring c_unblock_pcu := '24048200c4'O;
const octetstring c_unblock_ack_q := '25048200c4'O;
const octetstring c_fc_bvc_pcu := '261e8101058200fa038200c8018200fa1c8200c806820000'O;
const octetstring c_fc_bvc_ack_q := '271e8101'O;
const octetstring c_gmm_mo_att_req := '01bb146ddd000004088832f44000c80051e000800e003b01c001080103e5e000110a0005f4fb146ddd32f44000c8001d1b53432b37159ef9090070000dd9c6321200e00019b32c642401c0002017057bf0ec'O;
const octetstring c_gmm_mt_ac_req := '00bb146ddd0050001682ffff0a8204030e9c41c001081200102198c72477ea104895e8b959acc58b108182f4d045'O;
const octetstring c_gmm_mo_ac_resp := '01bb146ddd000004088832f44000c80051e000800e000e01c00508130122fa361f5fdd623d'O;
const octetstring c_gmm_mt_att_acc := '00bb146ddd0050001682ffff0a8204030e9841c005080201340432f44000c8001805f4fb146ddd0967d0'O;
const octetstring c_gmm_mt_det_req := '00bb146ddd0050001682ffff0a8204030e8941c00908050215f0b6'O;
const octetstring c_gmm_mo_att_cpl := '01fb146ddd000004088832f44000c80051e000800e000801c009080339d7bc'O;
f_bssgp_dec_and_log(c_bvc_reset_pcu);
f_bssgp_dec_and_log(c_bvc_reset_q);
f_bssgp_dec_and_log(c_status_pcu);
f_bssgp_dec_and_log(c_reset_ack_q);
f_bssgp_dec_and_log(c_reset_ack_pcu);
f_bssgp_dec_and_log(c_unblock_pcu);
f_bssgp_dec_and_log(c_unblock_ack_q);
f_bssgp_dec_and_log(c_fc_bvc_pcu);
f_bssgp_dec_and_log(c_fc_bvc_ack_q);
f_bssgp_dec_and_log(c_gmm_mo_att_req);
f_bssgp_dec_and_log(c_gmm_mt_ac_req);
f_bssgp_dec_and_log(c_gmm_mo_ac_resp);
f_bssgp_dec_and_log(c_gmm_mt_att_acc);
f_bssgp_dec_and_log(c_gmm_mt_det_req);
f_bssgp_dec_and_log(c_gmm_mo_att_cpl);
log(ts_BSSGP_PS_PAGING_IMSI(196, '262420123456789'H));
}
function f_ns_assert_prepr(in octetstring a, in octetstring b) {
log("NS Input: ", a);
log("NS Expected: ", b);
if (a != b) {
setverdict(fail);
} else {
setverdict(pass);
}
}
function f_ns_dec_and_log(in octetstring inp) {
log("NS Input: ", inp);
var PDU_NS dec := dec_PDU_NS(inp);
log("NS Decoded: ", dec);
}
testcase TC_selftest_ns() runs on dummy_CT {
const octetstring c_ns_reset_pcu := '000000c4271e813d'O;
/* single byte length to two byte length */
f_ns_assert_prepr('04058101'O, '0405000101'O);
f_ns_assert_prepr('040589000102030405060708'O, '04050009000102030405060708'O);
/* two byte length to two byte length */
f_ns_assert_prepr('0405000101'O, '0405000101'O);
/* special case: NS-UNITDATA */
f_ns_assert_prepr('00aabbccddeeffaa29822342'O, '00aabbccddeeffaa2900022342'O);
/* multiple TLVs */
f_ns_assert_prepr('234281aa4382bbbb'O, '23420001aa430002bbbb'O);
/* zero-length */
f_ns_assert_prepr('230080'O, '23000000'O);
f_ns_dec_and_log(c_ns_reset_pcu);
}
const octetstring gmm_auth_req := '081200102198c72477ea104895e8b959acc58b108182'O;
/* Wrap downlink GMM into LLC, encode + send it via BSSGP to PCU */
function tx_gmm(BIT1 c_r, in octetstring gmm_pdu, BIT4 sapi := c_LLC_SAPI_LLGMM) runs on dummy_CT {
var PDU_LLC llc;
//log("GMM Tx: ", dec_PDU_L3_SGSN_MS(gmm_pdu));
log(c_r, g_mmctx.n_u, gmm_pdu, sapi);
llc := valueof(ts_LLC_UI(gmm_pdu, sapi, c_r, g_mmctx.n_u));
log(llc);
g_mmctx.n_u := g_mmctx.n_u + 1;
log(ts_BSSGP_DL_UD(g_mmctx.tlli, enc_PDU_LLC(llc)));
BSSGP.send(ts_BSSGP_DL_UD(g_mmctx.tlli, enc_PDU_LLC(llc)));
}
/* Establish BSSGP connection to PCU */
function f_bssgp_establish() runs on dummy_CT {
timer T:= 10.0;
f_init();
T.start
alt {
[] BSSGP.receive(t_BssgpStsInd(?, ?, BVC_S_UNBLOCKED)) { }
[] BSSGP.receive { repeat; }
[] T.timeout { setverdict(fail); }
}
T.stop
log("BSSGP successfully initialized");
}
/* Send PS-PAGING via BSSGP to PCU, expect it to show up on L1/Um */
testcase TC_paging() runs on dummy_CT {
var hexstring imsi := '262420123456789'H;
var BssgpBvci bvci := 196;
var GsmTmsi tmsi := hex2int('01234567'H);
f_bssgp_establish();
BSSGP.send(ts_BSSGP_PS_PAGING_IMSI(bvci, imsi));
BSSGP.send(ts_BSSGP_PS_PAGING_PTMSI(bvci, imsi, tmsi));
while (true) {
var BssgpDecoded bd;
alt {
[] BSSGP.receive(tr_BD_L3_MT(?)) -> value bd {
log("BSSGP Rx: ", bd);
}
[] BSSGP.receive(t_BssgpStsInd(?, ?, BVC_S_UNBLOCKED)) { repeat; }
[] BSSGP.receive { repeat; }
}
}
}
/* Establish an UL TBF: Tune to ARFCN, send RACH, receive AGCH, enable TBF Rx */
function f_establish_ul_tbf() runs on dummy_CT {
timer T := 5.0;
var BCCH_tune_req tune_req := { { false, 871 }, true };
L1.send(tune_req);
/* FIXME: wait for confirm */
var TBF_establish_req est_req := { ra := hex2int('7B'H) };
L1.send(est_req);
T.start;
/* FIXME: wait for confirm */
alt {
[] L1.receive(TBF_establish_res:?) {}
[] L1.receive { repeat; }
[] T.timeout { setverdict(fail); }
}
T.stop;
}
/* Template fro uplink Data block */
template RlcmacUlBlock t_RLCMAC_UL_DATA(template uint5_t tfi, template uint4_t cv, template uint7_t bsn,
template LlcBlocks blocks := {}, template boolean stall := false) := {
data := {
mac_hdr := {
payload_type := MAC_PT_RLC_DATA,
countdown := cv,
stall_ind := false,
retry := false,
spare := '0'B,
pfi_ind := false,
tfi := tfi,
tlli_ind := false,
bsn := bsn,
e := false
},
tlli := omit,
pfi := omit,
blocks := blocks
}
}
template RlcmacUlBlock t_RLCMAC_UL_DATA_TLLI(template uint5_t tfi, template uint4_t cv, template uint7_t bsn,
template LlcBlocks blocks := {}, template boolean stall := false, template GprsTlli tlli) := {
data := {
mac_hdr := {
payload_type := MAC_PT_RLC_DATA,
countdown := cv,
stall_ind := false,
retry := false,
spare := '0'B,
pfi_ind := false,
tfi := tfi,
tlli_ind := true,
bsn := bsn,
e := false
},
tlli := tlli,
pfi := omit,
blocks := blocks
}
}
template DlMacHeader t_RLCMAC_DlMacH(template MacPayloadType pt, template MacRrbp rrbp, template
uint3_t usf) := {
payload_type := pt,
rrbp := rrbp,
rrbp_valid := ispresent(rrbp),
usf := usf
}
/* Receive Template for Downlink ACK/NACK */
template RlcmacDlBlock tr_RLCMAC_ACK_NACK(template uint5_t ul_tfi, template GprsTlli tlli := ?) := {
ctrl := {
mac_hdr := {
payload_type := (MAC_PT_RLCMAC_NO_OPT, MAC_PT_RLCMAC_OPT),
rrbp:= ?,
rrbp_valid := true,
usf := ?
},
opt := *,
payload := {
msg_type := PACKET_UL_ACK_NACK,
u := {
ul_ack_nack := {
page_mode := ?,
msg_excape := ?,
uplink_tfi := ul_tfi,
is_egprs := '0'B,
gprs := {
ch_coding_cmd := ?,
ack_nack_desc := ?,
cont_res_tlli_present := ?,
cont_res_tlli := tlli,
pkt_ta_present := ?,
pkt_ta := *,
pwr_ctrl_present := ?,
pwr_ctrl := *
}
}
}
}
}
}
/* Template for Uplink MAC Control Header */
template UlMacCtrlHeader t_RLCMAC_UlMacCtrlH(template MacPayloadType pt, template boolean retry := false) := {
payload_type := pt,
spare := '00000'B,
retry := retry
}
/* Template for Uplink Conntrol ACK */
template RlcmacUlBlock ts_RLCMAC_CTRL_ACK(GprsTlli tlli, CtrlAck ack := MS_RCVD_TWO_RLC_SAME_RTI_DIFF_RBSN) := {
ctrl := {
mac_hdr := t_RLCMAC_UlMacCtrlH(MAC_PT_RLCMAC_NO_OPT),
payload := {
msg_type := PACKET_CONTROL_ACK,
u := {
ctrl_ack := {
tlli := tlli,
ctrl_ack := ack
}
}
}
}
}
/* Template for a LlcBlock (part of a LLC frame inside RlcMac?lDataBlock */
template LlcBlock t_RLCMAC_LLCBLOCK(octetstring data, BIT1 more := '0'B, boolean e := true) := {
hdr := {
length_ind := lengthof(data),
more := more,
e := e
},
payload := data
}
/* compute a random TLLI; FIXME: what about TLLI prefix / local/foreign/...? */
function f_random_tlli() return GprsTlli {
var GprsTlli tlli := f_rnd_octstring(4);
return tlli;
}
/* Compute the frame number of the uplink block based on current fn + rrbp */
function f_rrbp_fn(GsmFrameNumber fn, MacRrbp rrbp) return GsmFrameNumber {
var integer add;
select (rrbp) {
case (RRBP_Nplus13_mod_2715648) {
add := 13;
}
case (RRBP_Nplus17_or_18_mod_2715648) {
add := 17; /* FIXME: What about 'or 18'? */
}
case (RRBP_Nplus21_or_22_mod_2715648) {
add := 21; /* FIXME: What about 'or 22'? */
}
case (RRBP_Nplus26_mod_2715648) {
add := 26;
}
}
return (fn + add) mod 2715648;
}
/* Send a single Uplink Block via Um; Verify reception on BSSGP; Expect UL_ACK on Um */
function f_single_ul_block(GprsCodingScheme cs) runs on dummy_CT {
var octetstring payload := '01020304'O;
var PDU_LLC llc := valueof(ts_LLC_UI(payload, c_LLC_SAPI_LLGMM, '0'B, g_mmctx.n_u));
var octetstring llc_enc := enc_PDU_LLC(llc);
var RLCMAC_ph_data_ind dl;
/* establish upling TBF */
f_establish_ul_tbf();
/* Generate LLC PDU consisting of single RLC block and send it via simulated MS */
var template RlcmacUlBlock blk := t_RLCMAC_UL_DATA_TLLI(0, 0, 0, {t_RLCMAC_LLCBLOCK(llc_enc)}, false, g_mmctx.tlli);
L1.send(RLCMAC_ph_data_req:{dyn:={tbf_id := 0, cs := cs, block := blk}});
/* ensure that this LLC-PDU arrives from the right TLLI at the (simulated) SGSN */
BSSGP.receive(tr_BD_BSSGP(tr_BSSGP_UL_UD(g_mmctx.tlli, ?, llc_enc)));
/* ensure the MS eceives an UL_ACK_NACK */
alt {
[] L1.receive(RLCMAC_ph_data_ind:{cs:=?, ts_nr:=?, fn:=?, block:=tr_RLCMAC_ACK_NACK(0, g_mmctx.tlli)}) -> value dl {
log("found matching ACK/NACK");
/* send CTRL ACK in uplink */
var GsmFrameNumber ul_fn := f_rrbp_fn(dl.fn, dl.block.ctrl.mac_hdr.rrbp);
var RlcmacUlCtrlMsg ctrl_ack := valueof(ts_RlcMacUlCtrl_PKT_CTRL_ACK(g_mmctx.tlli));
var RlcmacUlBlock ul_block := valueof(ts_RLC_UL_CTRL_ACK(ctrl_ack));
L1.send(ts_PH_DATA_ABS(0, CS1, dl.ts_nr, ul_fn, {false, 0}, ul_block));
}
[] L1.receive { repeat; };
}
}
testcase TC_rach() runs on dummy_CT {
var BssgpBvci bvci := 196;
g_mmctx.imsi := '262420123456789'H;
g_mmctx.tlli := f_random_tlli();
f_init();
f_bssgp_client_register(g_mmctx.imsi, g_mmctx.tlli, mp_gb_cfg.cell_id);
f_bssgp_establish();
f_single_ul_block(CS1);
while (true) {
var BssgpDecoded bd;
var RLCMAC_ph_data_ind dl_msg;
alt {
[] BSSGP.receive(tr_BD_BSSGP(?)) -> value bd {
log("BSSGP Rx: ", bd);
}
[] BSSGP.receive(t_BssgpStsInd(?, ?, BVC_S_UNBLOCKED)) { repeat; }
[] BSSGP.receive { repeat; }
[] L1.receive(RLCMAC_ph_data_ind:?) -> value dl_msg {
log("L1 DL: ", dl_msg);
}
}
}
}
testcase TC_nsem() runs on dummy_CT {
f_bssgp_establish();
while (true) {
var BssgpDecoded bd;
alt {
[] BSSGP.receive(tr_BD_BSSGP(?)) -> value bd {
log("BSSGP Rx: ", bd);
//log("GMM Rx: ", dec_PDU_L3_MS_SGSN(pdu.payload));
g_mmctx.tlli := bd.bssgp.pDU_BSSGP_UL_UNITDATA.tLLI;
tx_gmm(LLC_CR_DL_CMD, gmm_auth_req);
}
[] BSSGP.receive(t_BssgpStsInd(?, ?, BVC_S_UNBLOCKED)) { repeat; }
[] BSSGP.receive { repeat; }
}
}
}
function f_llc_dec_and_log(in octetstring inp) {
log("LLC Input: ", inp);
var PDU_LLC dec := dec_PDU_LLC(inp);
log("LLC Decoded: ", dec);
}
function f_llc_assert(in octetstring a, in octetstring b) {
log("LLC Input: ", a);
log("LLC Expected: ", b);
if (a != b) {
setverdict(fail);
} else {
setverdict(pass);
}
}
testcase TC_selftest_llc() runs on dummy_CT {
const octetstring c_gmm_att_pcu := '01c001080103e5e000210a0005f4fb146ddd32f44000c8001d1b53432b37159ef9090070000dd9c6321200e00019b32c642401c00020170580460b'O;
const octetstring c_gmm_att_pcu_nofcs := '01c001080103e5e000210a0005f4fb146ddd32f44000c8001d1b53432b37159ef9090070000dd9c6321200e00019b32c642401c000201705'O;
f_llc_dec_and_log(c_gmm_att_pcu);
//f_llc_assert(f_LLC_append_fcs(c_gmm_att_pcu_nofcs), c_gmm_att_pcu);
log(valueof(ts_LLC_UI(gmm_auth_req, c_LLC_SAPI_LLGMM, LLC_CR_DL_CMD, g_mmctx.n_u)));
log(ts_LLC_UI(gmm_auth_req, c_LLC_SAPI_LLGMM, LLC_CR_DL_CMD, g_mmctx.n_u));
}
testcase TC_selftest_rlcmac() runs on dummy_CT {
var RlcmacDlCtrlBlock dcb;
var RlcmacUlCtrlBlock ucb;
const octetstring c_dl_ul_ack_nack := '40240080400000000000000077628dbba14b2b2b2b2b2b'O;
const octetstring c_dl_data := '0f00007341c001081200102198c72477ea104895e8b959acc58b108182f4d0454300'O;
const octetstring c_dl_data2 := '070002165dc0012b2b2b43c0012b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b00'O;
const octetstring c_ul_ctrl_ack := '4006ec51b7772b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b'O;
const octetstring c_ul_dl_ack_nack := '4008004000000000000000701000edc0000b2b2b2b2b2b'O;
const octetstring c_dl_ul_assign := '482857628dbbaf0126e68800082b2b2b2b2b2b2b2b2b2b'O;
log(c_dl_ul_ack_nack);
dcb := dec_RlcmacDlCtrlBlock(c_dl_ul_ack_nack);
log(dcb);
//log(dec_RlcmacDlCtrlMsg(dcb.payload));
f_rlcmac_dld_decenc(c_dl_data);
f_rlcmac_dld_decenc(c_dl_data2);
log(c_ul_ctrl_ack);
ucb := dec_RlcmacUlCtrlBlock(c_ul_ctrl_ack);
log(ucb);
//log(dec_RlcmacUlCtrlMsg(ucb.payload));
log(c_ul_dl_ack_nack);
ucb := dec_RlcmacUlCtrlBlock(c_ul_dl_ack_nack);
log(ucb);
//log(dec_RlcmacUlCtrlMsg(ucb.payload));
log(c_dl_ul_assign);
dcb := dec_RlcmacDlCtrlBlock(c_dl_ul_assign);
log(dcb);
//log(dec_RlcmacDlCtrlMsg(dcb.payload));
const octetstring c_uld_tlli_noext := '080101a61cab5201c001080103e5e000310a0005f4e61cab5232f44000c8001d1b00'O;
f_rlcmac_uld_decenc(c_uld_tlli_noext);
const octetstring c_uld_tlli_ext7pad := '0001041da61cab5200201705a96e102b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b00'O;
log("ULD_decenc");
f_rlcmac_uld_decenc(c_uld_tlli_ext7pad);
log("UL_decenc");
f_rlcmac_ul_decenc(c_uld_tlli_ext7pad);
f_rlcmac_ul_decenc(c_ul_dl_ack_nack);
}
function f_rlcmac_ul_decenc(in octetstring buf) {
log("==================================");
log("In: ", buf);
var RlcmacUlBlock udb := dec_RlcmacUlBlock(buf);
log("Dec: ", udb);
var octetstring enc := enc_RlcmacUlBlock(udb);
log("Enc: ", enc);
if (enc != buf) { setverdict(fail, "Re-encoded data doesn't equal input data"); }
}
function f_rlcmac_uld_decenc(in octetstring buf) {
log("==================================");
log("In: ", buf);
var RlcmacUlDataBlock udb := dec_RlcmacUlDataBlock(buf);
log("Dec: ", udb);
var octetstring enc := enc_RlcmacUlDataBlock(udb);
log("Enc: ", enc);
if (enc != buf) { setverdict(fail, "Re-encoded data doesn't equal input data"); }
}
function f_rlcmac_dld_decenc(in octetstring buf) {
log("==================================");
log("In: ", buf);
var RlcmacDlDataBlock udb := dec_RlcmacDlDataBlock(buf);
log("Dec: ", udb);
var octetstring enc := enc_RlcmacDlDataBlock(udb);
log("Enc: ", enc);
if (enc != buf) { setverdict(fail, "Re-encoded data doesn't equal input data"); }
}
testcase TC_selftest_rr() runs on dummy_CT {
//const octetstring c_paging_none := '06210001F02B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B'O
const octetstring c_paging_none := '1506210001F0'O;
const octetstring c_ia_tbf := '2d063f100fe3677bd8440000c800100b2b2b2b2b2b2b2b'O
log(c_paging_none);
log(dec_GsmRrMessage(c_paging_none));
log(c_ia_tbf);
log(dec_GsmRrMessage(c_ia_tbf));
}
control {
execute(TC_selftest_bssgp());
execute(TC_selftest_ns());
execute(TC_selftest_llc());
execute(TC_selftest_rr());
execute(TC_selftest_rlcmac());
execute(TC_nsem());
execute(TC_paging());
}
};
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