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MSC_Tests: Add support for multiple BSC 

The upcomming tests for inter-BSC handover make it necessary to
simulate multiple (two) BSCs to the MSC, while the current
Implementation can only handle one BSC instance at a time.

- Allow multiple BSC instances to be created
- Add a simple reset-test to test what happens when
  two BSC instances are started (BSSMAP reset from two
  different BSCs)

Change-Id: I52a4c8118828c1605cf672889982f987568ad17d
Related: OS#1609
This commit is contained in:
Philipp Maier 2018-03-27 14:52:35 +02:00
parent 0f4a0f941f
commit 7593298b36
4 changed files with 80 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
library/BSSAP_Adapter.ttcn
View File

@ -44,7 +44,8 @@ type record BSSAP_Configuration {
integer own_ssn,
integer peer_pc,
integer peer_ssn,
octetstring sio
octetstring sio,
integer rctx
};
/* construct a SCCP_PAR_Address with just PC + SSN and no GT */
@ -97,7 +98,7 @@ function f_bssap_init(inout BSSAP_Adapter ba, in BSSAP_Configuration cfg, charst
/* connect MTP3 service provider (M3UA) to lower side of SCCP */
connect(ba.vc_M3UA:MTP3_SP_PORT, ba.vc_SCCP:MTP3_SCCP_PORT);
ba.vc_M3UA.start(f_M3UA_Emulation(cfg.sctp_addr));
ba.vc_M3UA.start(f_M3UA_Emulation(cfg.sctp_addr, cfg.rctx));
ba.vc_SCCP.start(SCCPStart(ba.sccp_pars));
if (isvalue(ops)) {

1
msc/MSC_Tests.cfg
View File

@ -58,4 +58,5 @@ MSC_Tests.control
#MSC_Tests.TC_lu_imsi_auth_tmsi_encr_013_2
#MSC_Tests.TC_mo_release_timeout
#MSC_Tests.TC_lu_and_mt_call_no_dlcx_resp
#MSC_Tests.TC_reset_two
#MSC_Tests.TC_lu_and_mt_call

28
msc/MSC_Tests.default
View File

@ -24,14 +24,28 @@ mtc.FileMask := ERROR | WARNING;
[MODULE_PARAMETERS]
M3UA_Emulation.tsp_logVerbose := true;
MSC_Tests.mp_bssap_cfg := {
sccp_service_type := "mtp3_itu",
sctp_addr := { 23906, "127.0.0.1", 2905, "127.0.0.1" },
own_pc := 193,
own_ssn := 254,
peer_pc := 185,
peer_ssn := 254,
sio := '83'O
{
sccp_service_type := "mtp3_itu",
sctp_addr := { 23906, "127.0.0.1", 2905, "127.0.0.1" },
own_pc := 193,
own_ssn := 254,
peer_pc := 185,
peer_ssn := 254,
sio := '83'O
rctx := 0
},
{
sccp_service_type := "mtp3_itu",
sctp_addr := { 23907, "127.0.0.1", 2905, "127.0.0.1" },
own_pc := 194,
own_ssn := 254,
peer_pc := 185,
peer_ssn := 254,
sio := '83'O
rctx := 1
}
};
Osmocom_VTY_Functions.mp_prompt_prefix := "OsmoMSC";
[MAIN_CONTROLLER]

74
msc/MSC_Tests.ttcn
View File

@ -47,11 +47,13 @@ import from MobileL3_CommonIE_Types all;
import from L3_Templates all;
import from L3_Common all;
const integer NUM_BSC := 2;
type record of BSSAP_Configuration BSSAP_Configurations;
type component MTC_CT extends CTRL_Adapter_CT {
var boolean g_initialized := false;
var BSSAP_Adapter g_bssap;
var BSSAP_Adapter g_bssap[NUM_BSC];
/* no 'adapter_CT' for MNCC or GSUP */
var MNCC_Emulation_CT vc_MNCC;
@ -89,13 +91,27 @@ modulepar {
charstring mp_msc_mncc := "/tmp/mncc";
BSSAP_Configuration mp_bssap_cfg := {
sccp_service_type := "mtp3_itu",
sctp_addr := { 23905, "127.0.0.1", 2905, "127.0.0.1" },
own_pc := 185,
own_ssn := 254,
peer_pc := 187,
peer_ssn := 254
BSSAP_Configurations mp_bssap_cfg := {
{
sccp_service_type := "mtp3_itu",
sctp_addr := { 23905, "127.0.0.1", 2905, "127.0.0.1" },
own_pc := 185,
own_ssn := 254,
peer_pc := 187,
peer_ssn := 254,
sio := '83'O,
rctx := 0
},
{
sccp_service_type := "mtp3_itu",
sctp_addr := { 23906, "127.0.0.1", 2905, "127.0.0.1" },
own_pc := 186,
own_ssn := 254,
peer_pc := 187,
peer_ssn := 254,
sio := '83'O,
rctx := 1
}
};
}
@ -167,14 +183,25 @@ function f_init_gsup(charstring id) runs on MTC_CT {
}
}
function f_init() runs on MTC_CT {
function f_init(integer num_bsc := 1) runs on MTC_CT {
if (g_initialized == true) {
return;
}
g_initialized := true;
f_bssap_init(g_bssap, mp_bssap_cfg, "MSC_Test", BSC_BssmapOps);
if (num_bsc > NUM_BSC) {
setverdict(fail, "excess number of BSC instances requested");
}
for (var integer i := 0; i < num_bsc; i := i + 1) {
if (isbound(mp_bssap_cfg[i])) {
f_bssap_init(g_bssap[0], mp_bssap_cfg[i], "MSC_Test_" & int2str(i), BSC_BssmapOps);
} else {
setverdict(fail, "missing BSSAP configuration");
}
}
f_ipa_ctrl_start(mp_msc_ip, mp_msc_ctrl_port);
f_init_mncc("MSC_Test");
f_init_mgcp("MSC_Test");
@ -194,8 +221,8 @@ function f_init() runs on MTC_CT {
* to f_init() when the high level functions of the BSC_ConnectionHandler are
* not needed. */
function f_init_bssap_direct() runs on MTC_CT {
f_bssap_init(g_bssap, mp_bssap_cfg, "MSC_Test", omit);
connect(g_bssap.vc_SCCP:SCCP_SP_PORT, self:BSSAP_DIRECT);
f_bssap_init(g_bssap[0], mp_bssap_cfg[0], "MSC_Test", omit);
connect(g_bssap[0].vc_SCCP:SCCP_SP_PORT, self:BSSAP_DIRECT);
/* Start guard timer and activate it as default */
Tguard_direct.start
@ -376,8 +403,8 @@ function f_init_pars(integer imsi_suffix) runs on MTC_CT return BSC_ConnHdlrPars
expect_ciph := false
};
var BSC_ConnHdlrPars pars := {
sccp_addr_own := g_bssap.sccp_addr_own,
sccp_addr_peer := g_bssap.sccp_addr_peer,
sccp_addr_own := g_bssap[0].sccp_addr_own,
sccp_addr_peer := g_bssap[0].sccp_addr_peer,
cell_id := valueof(ts_CellId_CGI('262'H, '42'H, 23, 42)),
imei := f_gen_imei(imsi_suffix),
imsi := f_gen_imsi(imsi_suffix),
@ -399,8 +426,8 @@ function f_start_handler_with_pars(void_fn fn, BSC_ConnHdlrPars pars) runs on MT
vc_conn := BSC_ConnHdlr.create(id);
/* BSSMAP part / A interface */
connect(vc_conn:BSSAP, g_bssap.vc_BSSMAP:CLIENT);
connect(vc_conn:BSSAP_PROC, g_bssap.vc_BSSMAP:PROC);
connect(vc_conn:BSSAP, g_bssap[0].vc_BSSMAP:CLIENT);
connect(vc_conn:BSSAP_PROC, g_bssap[0].vc_BSSMAP:PROC);
/* MNCC part */
connect(vc_conn:MNCC, vc_MNCC:MNCC_CLIENT);
connect(vc_conn:MNCC_PROC, vc_MNCC:MNCC_PROC);
@ -1665,10 +1692,10 @@ testcase TC_cr_before_reset() runs on MTC_CT {
f_init_bssap_direct();
/* Make a blind connection attemt, to trigger the deadlock condition */
BSSAP_DIRECT.send(ts_BSSAP_CONNECT_req(g_bssap.sccp_addr_peer, g_bssap.sccp_addr_own, 1, omit));
BSSAP_DIRECT.send(ts_BSSAP_CONNECT_req(g_bssap[0].sccp_addr_peer, g_bssap[0].sccp_addr_own, 1, omit));
/* Send a BSSMAP reset */
BSSAP_DIRECT.send(ts_BSSAP_UNITDATA_req(g_bssap.sccp_addr_peer, g_bssap.sccp_addr_own, ts_BSSMAP_Reset(0)));
BSSAP_DIRECT.send(ts_BSSAP_UNITDATA_req(g_bssap[0].sccp_addr_peer, g_bssap[0].sccp_addr_own, ts_BSSMAP_Reset(0)));
T.start
alt {
[] BSSAP_DIRECT.receive(tr_BSSAP_UNITDATA_ind(?, ?, tr_BSSMAP_ResetAck)) {
@ -1678,7 +1705,7 @@ testcase TC_cr_before_reset() runs on MTC_CT {
/* Acknowledge MSC sided reset requests */
[] BSSAP_DIRECT.receive(tr_BSSAP_UNITDATA_ind(?, ?, tr_BSSMAP_Reset)) {
BSSAP_DIRECT.send(ts_BSSAP_UNITDATA_req(g_bssap.sccp_addr_peer, g_bssap.sccp_addr_own, ts_BSSMAP_ResetAck));
BSSAP_DIRECT.send(ts_BSSAP_UNITDATA_req(g_bssap[0].sccp_addr_peer, g_bssap[0].sccp_addr_own, ts_BSSMAP_ResetAck));
repeat;
}
@ -1774,6 +1801,14 @@ testcase TC_lu_and_mt_call_no_dlcx_resp() runs on MTC_CT {
f_init();
}
/* Two BSSMAP resets from two different BSCs */
testcase TC_reset_two() runs on MTC_CT {
var BSC_ConnHdlr vc_conn;
f_init(2);
f_sleep(2.0);
setverdict(pass);
}
/* TODO:
* continue to send repeated MO signalling messages to keep channel open: does MSC tmeout?
* malformed messages (missing IE, invalid message type): properly rejected?
@ -1831,6 +1866,7 @@ control {
execute( TC_lu_imsi_auth_tmsi_encr_013_2() );
execute( TC_mo_release_timeout() );
execute( TC_lu_and_mt_call_no_dlcx_resp() );
execute( TC_reset_two() );
execute( TC_lu_and_mt_call() );