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osmo-ttcn3-hacks
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l1ctl/lapdm test infrastructure: Move helper functions out 

moving all templates into L1CTL_Types as well as helper functions into
L1CTL_PortType allows us to have a clean L1CTL_Test.ttcn where we can
focus on actual test cases.  At the moment it's just a PoC that can
establish dedicated mode and send a SABM frame to the BTS, which is
properly echo'ed back in the UA, as expected for contention resolution.
This commit is contained in:
Harald Welte 2017-07-16 23:18:09 +02:00
parent 66110f0d77
commit 9e4725dcd3
4 changed files with 266 additions and 206 deletions
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55
lapd/L1CTL_PortType.ttcn
View File

@ -3,6 +3,8 @@ module L1CTL_PortType {
import from L1CTL_Types all;
import from UD_PortType all;
import from UD_Types all;
import from Osmocom_Types all;
import from GSM_Types all;
type record L1CTL_connect {
charstring path
@ -13,6 +15,59 @@ module L1CTL_PortType {
charstring err optional
}
function f_L1CTL_FBSB(L1CTL_PT pt, Arfcn arfcn, L1ctlCcchMode ccch_mode := CCCH_MODE_COMBINED) {
timer T := 5.0;
pt.send(t_L1CTL_FBSB_REQ(arfcn, t_L1CTL_FBSB_F_ALL, 0, ccch_mode, 0));
T.start
alt {
[] pt.receive(t_L1CTL_FBSB_CONF(0)) {};
[] pt.receive { repeat; };
[] T.timeout { setverdict(fail, "Timeout in FBSB") };
}
}
function f_L1CTL_RACH(L1CTL_PT pt, uint8_t ra, uint8_t combined := 1, uint16_t offset := 0) return GsmFrameNumber {
var L1ctlDlMessage rc;
var GsmFrameNumber fn;
timer T := 2.0;
T.start
pt.send(t_L1CTL_RACH_REQ(ra, 0, 0))
alt {
[] pt.receive(t_L1CTL_RACH_CONF) -> value rc { fn := rc.dl_info.frame_nr };
[] pt.receive { repeat; };
[] T.timeout { setverdict(fail, "Timeout in RACH") };
}
return fn;
}
function f_L1CTL_WAIT_IMM_ASS(L1CTL_PT pt, uint8_t ra, GsmFrameNumber rach_fn) return ImmediateAssignment {
var L1ctlDlMessage dl;
var GsmRrMessage rr;
timer T := 10.0;
T.start;
alt {
[] pt.receive(t_L1CTL_DATA_IND(t_RslChanNr_PCH_AGCH(0))) -> value dl {
rr := dec_GsmRrMessage(dl.payload.data_ind.payload);
log("PCH/AGCN DL RR: ", rr);
if (match(rr, t_RR_IMM_ASS(ra, rach_fn))) {
log("Received IMM.ASS for our RACH!");
} else {
repeat;
}
};
[] pt.receive { repeat };
[] T.timeout { setverdict(fail, "Timeout waiting for IMM ASS") };
}
T.stop;
return rr.payload.imm_ass;
}
/* Send DM_EST_REQ from parameters derived from IMM ASS */
function f_L1CTL_DM_EST_REQ_IA(L1CTL_PT pt, ImmediateAssignment imm_ass) {
pt.send(t_L1CTL_DM_EST_REQ({ false, imm_ass.chan_desc.arfcn }, imm_ass.chan_desc.chan_nr, imm_ass.chan_desc.tsc));
}
private function L1CTL_to_UD_connect(in L1CTL_connect pin, out UD_connect pout) {
pout.path := pin.path;
pout.id := 0;

262
lapd/L1CTL_Test.ttcn
View File

@ -3,6 +3,7 @@ module L1CTL_Test {
import from Osmocom_Types all;
import from L1CTL_Types all;
import from L1CTL_PortType all;
import from LAPDm_Types all;
const octetstring c_ul_param_req := '1300000000000000001d0000'O;
const octetstring c_ul_data_req := '060a0128284018001d000103490615004001c0000000000000000000000000'O;
@ -16,134 +17,7 @@ module L1CTL_Test {
type component dummy_CT {
var charstring l1ctl_sock_path := "/tmp/osmocom_l2";
port L1CTL_PT L1CTL;
};
/* for generating RESET_REQ */
template L1ctlUlMessage t_L1ctlResetReq(template L1ctlResetType rst_type) := {
header := t_L1ctlHeader(L1CTL_RESET_REQ),
ul_info := omit,
payload := {
reset_req := {
reset_type := rst_type,
padding := '000000'O
}
}
};
/* for generating FBSB_REQ */
template L1ctlUlMessage t_L1CTL_FBSB_REQ(template Arfcn arfcn, template L1ctlFbsbFlags flags, uint8_t sync_info_idx, L1ctlCcchMode ccch_mode, GsmRxLev rxlev_exp) := {
header := t_L1ctlHeader(L1CTL_FBSB_REQ),
ul_info := omit,
payload := {
fbsb_req := {
arfcn := arfcn,
timeout_tdma_frames := 10,
freq_err_thresh1 := 10000,
freq_err_thresh2 := 800,
num_freqerr_avg := 3,
flags := flags,
sync_info_idx := sync_info_idx,
ccch_mode := ccch_mode,
rxlev_exp := rxlev_exp
}
}
};
/* for matching against incoming FBSB_CONF */
template L1ctlDlMessage t_L1CTL_FBSB_CONF(template uint8_t result) := {
header := t_L1ctlHeader(L1CTL_FBSB_CONF),
dl_info := ?,
payload := {
fbsb_conf := {
initial_freq_err := ?,
result := result,
bsic := ?
}
}
};
template L1ctlUlMessage t_L1CTL_RACH_REQ(uint8_t ra, uint8_t combined, uint16_t offset) := {
header := t_L1ctlHeader(L1CTL_RACH_REQ),
ul_info := {
chan_nr := t_RslChanNr_RACH(0),
link_id := ts_RslLinkID_DCCH(0),
padding := '0000'O
},
payload := {
rach_req := {
ra := ra,
combined := combined,
offset := offset
}
}
}
template L1ctlUlMessage t_L1CTL_DM_EST_REQ(Arfcn arfcn, RslChannelNr chan_nr, GsmTsc tsc) := {
header := t_L1ctlHeader(L1CTL_DM_EST_REQ),
ul_info := {
chan_nr := chan_nr,
link_id := ts_RslLinkID_DCCH(0),
padding := '0000'O
},
payload := {
dm_est_req := {
tsc := tsc,
h := 0,
arfcn := arfcn,
hopping := omit,
tch_mode := 0,
audio_mode := t_L1CTL_AudioModeNone
}
}
}
template L1ctlUlMessage t_L1CTL_DM_REL_REQ(RslChannelNr chan_nr) := {
header := t_L1ctlHeader(L1CTL_DM_EST_REQ),
ul_info := {
chan_nr := chan_nr,
link_id := ts_RslLinkID_DCCH(0),
padding := '0000'O
},
payload := {
other := ''O
}
}
template L1ctlUlMessage t_L1CTL_DATA_REQ(template RslChannelNr chan_nr, template RslLinkId link_id, octetstring l2_data) := {
header := t_L1ctlHeader(L1CTL_DATA_REQ),
ul_info := {
chan_nr := chan_nr,
link_id := link_id,
padding := '0000'O
},
payload := {
other := l2_data
}
}
/* for matching against incoming RACH_CONF */
template L1ctlDlMessage t_L1CTL_RACH_CONF := {
header := t_L1ctlHeader(L1CTL_RACH_CONF),
dl_info := ?,
payload := ?
};
/* for matching against incoming RACH_CONF */
template L1ctlDlMessage t_L1CTL_DATA_IND(template RslChannelNr chan_nr) := {
header := t_L1ctlHeader(L1CTL_DATA_IND),
dl_info := {
chan_nr := chan_nr,
link_id := ?,
arfcn := ?,
frame_nr := ?,
rx_level := ?,
snr := ?,
num_biterr := ?,
fire_crc := ?
},
payload := {
data_ind := ?
}
var ChannelDescription chan_desc;
};
@ -156,7 +30,8 @@ module L1CTL_Test {
L1CTL.receive;
}
testcase TC_si1() runs on dummy_CT {
/* a very ppor man's job to check if we can actually still decode the L1CTL binary messages */
testcase TC_selftest() runs on dummy_CT {
log("L1CTL_PARAM_REQ: ", dec_L1ctlUlMessage(c_ul_param_req));
log("L1CTL_DATA_REQ: ", dec_L1ctlUlMessage(c_ul_data_req));
log("L1CTL_CCCH_MODE_REQ: ", dec_L1ctlUlMessage(c_ul_ccch_mode_req));
@ -167,79 +42,12 @@ module L1CTL_Test {
setverdict(pass);
}
function f_L1CTL_FBSB(L1CTL_PT pt, Arfcn arfcn, L1ctlCcchMode ccch_mode := CCCH_MODE_COMBINED) {
timer T := 5.0;
pt.send(t_L1CTL_FBSB_REQ(arfcn, t_L1CTL_FBSB_F_ALL, 0, ccch_mode, 0));
T.start
alt {
[] pt.receive(t_L1CTL_FBSB_CONF(0)) {};
[] pt.receive { repeat; };
[] T.timeout { setverdict(fail, "Timeout in FBSB") };
}
}
function f_L1CTL_RACH(L1CTL_PT pt, uint8_t ra, uint8_t combined := 1, uint16_t offset := 0) return GsmFrameNumber {
var L1ctlDlMessage rc;
var GsmFrameNumber fn;
timer T := 2.0;
T.start
pt.send(t_L1CTL_RACH_REQ(ra, 0, 0))
alt {
[] pt.receive(t_L1CTL_RACH_CONF) -> value rc { fn := rc.dl_info.frame_nr };
[] pt.receive { repeat; };
[] T.timeout { setverdict(fail, "Timeout in RACH") };
}
return fn;
}
template GsmRrMessage t_RR_IMM_ASS(uint8_t ra, uint8_t fn) := {
header := t_RrHeader(IMMEDIATE_ASSIGNMENT, ?),
payload := {
imm_ass := {
ded_or_tbf := ?,
page_mode := ?,
chan_desc := ?,
pkt_chan_desc := omit,
req_ref := f_compute_ReqRef(ra, fn),
timing_advance := ?,
mobile_allocation := ?
}
}
};
function f_L1CTL_WAIT_IMM_ASS(L1CTL_PT pt, uint8_t ra, GsmFrameNumber rach_fn) return ImmediateAssignment {
var L1ctlDlMessage dl;
var GsmRrMessage rr;
timer T := 10.0;
T.start;
alt {
[] pt.receive(t_L1CTL_DATA_IND(t_RslChanNr_PCH_AGCH(0))) -> value dl {
rr := dec_GsmRrMessage(dl.payload.data_ind.payload);
log("PCH/AGCN DL RR: ", rr);
if (match(rr, t_RR_IMM_ASS(ra, rach_fn))) {
log("Received IMM.ASS for our RACH!");
} else {
repeat;
}
};
[] pt.receive { repeat };
[] T.timeout { setverdict(fail, "Timeout waiting for IMM ASS") };
}
T.stop;
return rr.payload.imm_ass;
}
/* Send DM_EST_REQ from parameters derived from IMM ASS */
function f_L1CTL_DM_EST_REQ_IA(L1CTL_PT pt, ImmediateAssignment imm_ass) {
pt.send(t_L1CTL_DM_EST_REQ({ false, imm_ass.chan_desc.arfcn }, imm_ass.chan_desc.chan_nr, imm_ass.chan_desc.tsc));
}
testcase TC_l1ctl() runs on dummy_CT {
/* master function establishing a dedicated radio channel */
function f_establish_dcch() runs on dummy_CT {
var ImmediateAssignment imm_ass;
var GsmFrameNumber rach_fn;
var uint8_t ra := 23;
var ImmediateAssignment imm_ass;
f_init();
/* send FB/SB req to sync to cell */
f_L1CTL_FBSB(L1CTL, { false, 871 }, CCCH_MODE_COMBINED);
/* send RACH request and obtain FN at which it was sent */
@ -249,17 +57,63 @@ module L1CTL_Test {
/* send DM_EST_REQ */
f_L1CTL_DM_EST_REQ_IA(L1CTL, imm_ass);
L1CTL.send(t_L1CTL_DATA_REQ(imm_ass.chan_desc.chan_nr, ts_RslLinkID_DCCH(0), '000102030405060708090a0b0c0d0e0f10111213141516'O));
L1CTL.send(t_L1CTL_DATA_REQ(imm_ass.chan_desc.chan_nr, ts_RslLinkID_DCCH(0), '000102030405060708090a0b0c0d0e0f10111213141516'O));
L1CTL.send(t_L1CTL_DATA_REQ(imm_ass.chan_desc.chan_nr, ts_RslLinkID_DCCH(0), '000102030405060708090a0b0c0d0e0f10111213141516'O));
chan_desc := imm_ass.chan_desc;
}
L1CTL.send(t_L1CTL_DM_REL_REQ(imm_ass.chan_desc.chan_nr));
/* send some data over an established dedicated radio channel */
function f_send_l2(template RslLinkId link_id, octetstring l2_data) runs on dummy_CT {
L1CTL.send(t_L1CTL_DATA_REQ(chan_desc.chan_nr, link_id, l2_data));
}
/* send some data over an established dedicated radio channel */
function f_send_l2_lapdm_b(template RslLinkId link_id, template LapdmFrameB b) runs on dummy_CT {
var octetstring l2_data := enc_LapdmFrameB(valueof(b));
L1CTL.send(t_L1CTL_DATA_REQ(chan_desc.chan_nr, link_id, l2_data));
}
function f_recv_l2() runs on dummy_CT return octetstring {
var L1ctlDlMessage dl;
var octetstring l2_data;
timer T := 5.0;
T.start
alt {
[] L1CTL.receive(t_L1CTL_DATA_IND(chan_desc.chan_nr)) -> value dl { l2_data := dl.payload.data_ind.payload };
[] L1CTL.receive { repeat; };
[] T.timeout { setverdict(fail, "Timeout waiting for DL data"); };
}
return l2_data;
}
/* release the dedicated radio channel */
function f_release_dcch() runs on dummy_CT {
L1CTL.send(t_L1CTL_DM_REL_REQ(chan_desc.chan_nr));
}
template LapdmFrameB LAPDm_SABM(template GsmSapi sapi, template octetstring payload) := {
addr := tr_LapdmAddr(sapi, false),
ctrl := t_LapdmCtrlSABM(true),
len := t_LapdmLengthIndicator(lengthof(payload)),
payload := payload
}
testcase TC_l1ctl() runs on dummy_CT {
f_init();
f_establish_dcch();
f_send_l2_lapdm_b(ts_RslLinkID_DCCH(0), LAPDm_SABM(0, 'FEFE'O));
f_recv_l2();
//f_send_l2(ts_RslLinkID_DCCH(0), '000102030405060708090a0b0c0d0e0f10111213141516'O);
f_release_dcch();
setverdict(pass);
}
control {
execute(TC_si1());
execute(TC_selftest());
execute(TC_l1ctl());
}
}

145
lapd/L1CTL_Types.ttcn
View File

@ -301,4 +301,149 @@ module L1CTL_Types {
with { extension "prototype(convert) decode(RAW)" };
/* for generating RESET_REQ */
template L1ctlUlMessage t_L1ctlResetReq(template L1ctlResetType rst_type) := {
header := t_L1ctlHeader(L1CTL_RESET_REQ),
ul_info := omit,
payload := {
reset_req := {
reset_type := rst_type,
padding := '000000'O
}
}
};
/* for generating FBSB_REQ */
template L1ctlUlMessage t_L1CTL_FBSB_REQ(template Arfcn arfcn, template L1ctlFbsbFlags flags, uint8_t sync_info_idx, L1ctlCcchMode ccch_mode, GsmRxLev rxlev_exp) := {
header := t_L1ctlHeader(L1CTL_FBSB_REQ),
ul_info := omit,
payload := {
fbsb_req := {
arfcn := arfcn,
timeout_tdma_frames := 10,
freq_err_thresh1 := 10000,
freq_err_thresh2 := 800,
num_freqerr_avg := 3,
flags := flags,
sync_info_idx := sync_info_idx,
ccch_mode := ccch_mode,
rxlev_exp := rxlev_exp
}
}
};
/* for matching against incoming FBSB_CONF */
template L1ctlDlMessage t_L1CTL_FBSB_CONF(template uint8_t result) := {
header := t_L1ctlHeader(L1CTL_FBSB_CONF),
dl_info := ?,
payload := {
fbsb_conf := {
initial_freq_err := ?,
result := result,
bsic := ?
}
}
};
template L1ctlUlMessage t_L1CTL_RACH_REQ(uint8_t ra, uint8_t combined, uint16_t offset) := {
header := t_L1ctlHeader(L1CTL_RACH_REQ),
ul_info := {
chan_nr := t_RslChanNr_RACH(0),
link_id := ts_RslLinkID_DCCH(0),
padding := '0000'O
},
payload := {
rach_req := {
ra := ra,
combined := combined,
offset := offset
}
}
}
template L1ctlUlMessage t_L1CTL_DM_EST_REQ(Arfcn arfcn, RslChannelNr chan_nr, GsmTsc tsc) := {
header := t_L1ctlHeader(L1CTL_DM_EST_REQ),
ul_info := {
chan_nr := chan_nr,
link_id := ts_RslLinkID_DCCH(0),
padding := '0000'O
},
payload := {
dm_est_req := {
tsc := tsc,
h := 0,
arfcn := arfcn,
hopping := omit,
tch_mode := 0,
audio_mode := t_L1CTL_AudioModeNone
}
}
}
template L1ctlUlMessage t_L1CTL_DM_REL_REQ(RslChannelNr chan_nr) := {
header := t_L1ctlHeader(L1CTL_DM_EST_REQ),
ul_info := {
chan_nr := chan_nr,
link_id := ts_RslLinkID_DCCH(0),
padding := '0000'O
},
payload := {
other := ''O
}
}
template L1ctlUlMessage t_L1CTL_DATA_REQ(template RslChannelNr chan_nr, template RslLinkId link_id, octetstring l2_data) := {
header := t_L1ctlHeader(L1CTL_DATA_REQ),
ul_info := {
chan_nr := chan_nr,
link_id := link_id,
padding := '0000'O
},
payload := {
other := l2_data
}
}
/* for matching against incoming RACH_CONF */
template L1ctlDlMessage t_L1CTL_RACH_CONF := {
header := t_L1ctlHeader(L1CTL_RACH_CONF),
dl_info := ?,
payload := ?
};
/* for matching against incoming RACH_CONF */
template L1ctlDlMessage t_L1CTL_DATA_IND(template RslChannelNr chan_nr) := {
header := t_L1ctlHeader(L1CTL_DATA_IND),
dl_info := {
chan_nr := chan_nr,
link_id := ?,
arfcn := ?,
frame_nr := ?,
rx_level := ?,
snr := ?,
num_biterr := ?,
fire_crc := ?
},
payload := {
data_ind := ?
}
};
template GsmRrMessage t_RR_IMM_ASS(uint8_t ra, uint8_t fn) := {
header := t_RrHeader(IMMEDIATE_ASSIGNMENT, ?),
payload := {
imm_ass := {
ded_or_tbf := ?,
page_mode := ?,
chan_desc := ?,
pkt_chan_desc := omit,
req_ref := f_compute_ReqRef(ra, fn),
timing_advance := ?,
mobile_allocation := ?
}
}
};
} with { encode "RAW" };

10
lapd/LAPDm_Types.ttcn
View File

@ -16,6 +16,12 @@ module LAPDm_Types {
uint1_t el
} with { variant "" };
template LapdmLengthIndicator t_LapdmLengthIndicator(template uint6_t len, boolean m := false) := {
len := len,
m := m,
el := 1
};
/* TS 44.006 Figure 4 */
type record LapdmAddressField {
BIT1 spare,
@ -25,7 +31,7 @@ module LAPDm_Types {
boolean ea
} with { variant "" };
template LapdmAddressField tr_LapdmAddr(LapdmSapi sapi, boolean c_r) := {
template LapdmAddressField tr_LapdmAddr(template LapdmSapi sapi, template boolean c_r) := {
spare := '0'B,
lpd := 0,
sapi := sapi,
@ -153,4 +159,4 @@ module LAPDm_Types {
external function dec_LapdmFrameB4(in octetstring stream) return LapdmFrameB4
with { extension "prototype(convert) decode(RAW)" };
} with { encode "RAW" };
} with { encode "RAW"; variant "FIELDORDER(msb)" }