summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorDaniel Willmann <dwillmann@sysmocom.de>2020-09-08 18:58:22 +0200
committerDaniel Willmann <dwillmann@sysmocom.de>2020-10-14 19:00:55 +0200
commita3db9ed765556b4d4f9eecfe0697e7ef862fea74 (patch)
treeca327ff45606577e468badec70d83cf304eca844
parent9669e1789c170c1f9c0a18459aeefc7d387630c0 (diff)
Add initial TTCN3 test for GbProxydaniel/gbproxy
The first testcase, TC_BVC_bringup just waits for NS/BSSGP Emulation to do their thing. If nothing fails there then we pass. Related: SYS#5002 Change-Id: Ib3dc05fe5598b53e963ca863968e387cc36b9de3
-rw-r--r--Makefile4
-rw-r--r--gbproxy/GBProxy_Tests.cfg33
-rw-r--r--gbproxy/GBProxy_Tests.default27
-rw-r--r--gbproxy/GBProxy_Tests.ttcn480
-rw-r--r--gbproxy/README.md18
-rwxr-xr-xgbproxy/gen_links.sh94
-rw-r--r--gbproxy/osmo-gbproxy.cfg25
-rwxr-xr-xgbproxy/regen_makefile.sh9
8 files changed, 688 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index 03e7a70..c4e8aff 100644
--- a/Makefile
+++ b/Makefile
@@ -13,8 +13,8 @@
# See the License for the specific language governing permissions and
# limitations under the License.
-SUBDIRS=bsc bsc-nat bts ccid ggsn_tests hlr mgw mme msc pcu pgw remsim sccp selftest sgsn \
- simtrace sip stp sysinfo
+SUBDIRS=bsc bsc-nat bts ccid gbproxy ggsn_tests hlr mgw mme msc pcu pgw remsim \
+ sccp selftest sgsn simtrace sip stp sysinfo
NPROC=$(shell nproc 2>/dev/null)
ifeq ($(NPROC),)
diff --git a/gbproxy/GBProxy_Tests.cfg b/gbproxy/GBProxy_Tests.cfg
new file mode 100644
index 0000000..3209be6
--- /dev/null
+++ b/gbproxy/GBProxy_Tests.cfg
@@ -0,0 +1,33 @@
+[ORDERED_INCLUDE]
+# Common configuration, shared between test suites
+"../Common.cfg"
+# testsuite specific configuration, not expected to change
+"./GBProxy_Tests.default"
+
+# Local configuration below
+
+[LOGGING]
+
+[TESTPORT_PARAMETERS]
+*.GBPVTY.CTRL_HOSTNAME := "127.0.0.1"
+
+[MODULE_PARAMETERS]
+GBProxy_Tests.mp_nsconfig_pcu := {
+ {provider := { ip := {
+ local_ip := "127.0.0.1",
+ remote_ip := "127.0.0.1"
+ }}},
+ {provider := { ip := {
+ local_ip := "127.0.0.1",
+ remote_ip := "127.0.0.1"
+ }}},
+ {provider := { ip := {
+ local_ip := "127.0.0.1",
+ remote_ip := "127.0.0.1"
+ }}}
+}
+
+[MAIN_CONTROLLER]
+
+[EXECUTE]
+GBProxy_Tests.control
diff --git a/gbproxy/GBProxy_Tests.default b/gbproxy/GBProxy_Tests.default
new file mode 100644
index 0000000..799ac32
--- /dev/null
+++ b/gbproxy/GBProxy_Tests.default
@@ -0,0 +1,27 @@
+[LOGGING]
+FileMask := LOG_ALL | TTCN_MATCHING;
+
+"IPA-CTRL-IPA".FileMask := ERROR | WARNING | PARALLEL | VERDICTOP;
+"GBProxy-GSUP-IPA".FileMask := ERROR | WARNING | PARALLEL | VERDICTOP;
+"GBProxy-Gb0-NS".FileMask := ERROR | WARNING | PARALLEL | VERDICTOP;
+"GBProxy-Gb0-BSSGP".FileMask := ERROR | WARNING | PARALLEL | VERDICTOP;
+"GBProxy-GSUP".FileMask := ERROR | WARNING | PARALLEL | VERDICTOP;
+
+[TESTPORT_PARAMETERS]
+*.GBPVTY.CTRL_MODE := "client"
+*.GBPVTY.CTRL_HOSTNAME := "127.0.0.1"
+*.GBPVTY.CTRL_PORTNUM := "4246"
+*.GBPVTY.CTRL_LOGIN_SKIPPED := "yes"
+*.GBPVTY.CTRL_DETECT_SERVER_DISCONNECTED := "yes"
+*.GBPVTY.CTRL_READMODE := "buffered"
+*.GBPVTY.CTRL_CLIENT_CLEANUP_LINEFEED := "yes"
+*.GBPVTY.CTRL_DETECT_CONNECTION_ESTABLISHMENT_RESULT := "yes"
+*.GBPVTY.PROMPT1 := "OsmoGbProxy> "
+
+
+[MODULE_PARAMETERS]
+Osmocom_VTY_Functions.mp_prompt_prefix := "OsmoGbProxy";
+
+[MAIN_CONTROLLER]
+
+[EXECUTE]
diff --git a/gbproxy/GBProxy_Tests.ttcn b/gbproxy/GBProxy_Tests.ttcn
new file mode 100644
index 0000000..000f584
--- /dev/null
+++ b/gbproxy/GBProxy_Tests.ttcn
@@ -0,0 +1,480 @@
+module GBProxy_Tests {
+
+/* Osmocom GBProxy test suite in TTCN-3
+ * (C) 2020 sysmocom - s.f.m.c. GmbH
+ * All rights reserved.
+ *
+ * Author: Daniel Willmann <dwillmann@sysmocom.de>
+
+ * Released under the terms of GNU General Public License, Version 2 or
+ * (at your option) any later version.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+import from General_Types all;
+import from Osmocom_Types all;
+import from GSM_Types all;
+import from Native_Functions all;
+import from NS_Types all;
+import from NS_Emulation all;
+import from BSSGP_Types all;
+import from BSSGP_Emulation all;
+import from SCCPasp_Types all;
+import from Osmocom_Gb_Types all;
+
+import from MobileL3_CommonIE_Types all;
+import from MobileL3_GMM_SM_Types all;
+import from MobileL3_Types all;
+import from L3_Templates all;
+import from L3_Common all;
+
+import from TELNETasp_PortType all;
+import from Osmocom_VTY_Functions all;
+
+import from LLC_Types all;
+import from LLC_Templates all;
+
+import from GSM_RR_Types all;
+
+modulepar {
+ /* IP/port on which we run our internal GSUP/HLR emulation */
+ NSConfigurations_SGSN mp_nsconfig_sgsn := {
+ {
+ provider := {
+ ip := {
+ address_family := AF_INET,
+ local_udp_port := 7777,
+ local_ip := "127.0.0.1",
+ remote_udp_port := 23000,
+ remote_ip := "127.0.0.1"
+ }
+ },
+ nsvci := 101,
+ nsei := 101,
+ role_sgsn := true,
+ handle_sns := true
+ }
+ };
+ NSConfigurations_PCU mp_nsconfig_pcu := {
+ {
+ provider := {
+ ip := {
+ address_family := AF_INET,
+ local_udp_port := 21010,
+ local_ip := "127.0.0.1",
+ remote_udp_port := 23000,
+ remote_ip := "127.0.0.1"
+ }
+ },
+ nsvci := 97,
+ nsei := 96,
+ role_sgsn := false,
+ handle_sns := false
+ },
+ {
+ provider := {
+ ip := {
+ address_family := AF_INET,
+ local_udp_port := 21011,
+ local_ip := "127.0.0.1",
+ remote_udp_port := 23000,
+ remote_ip := "127.0.0.1"
+ }
+ },
+ nsvci := 98,
+ nsei := 97,
+ role_sgsn := false,
+ handle_sns := false
+ },
+ {
+ provider := {
+ ip := {
+ address_family := AF_INET,
+ local_udp_port := 21012,
+ local_ip := "127.0.0.1",
+ remote_udp_port := 23000,
+ remote_ip := "127.0.0.1"
+ }
+ },
+ nsvci := 99,
+ nsei := 98,
+ role_sgsn := false,
+ handle_sns := false
+ }
+ };
+};
+
+const integer NUM_BVC_PER_NSE := 3;
+type record GbInstance {
+ NS_CT vc_NS,
+ BSSGP_CT vc_BSSGP,
+ BSSGP_BVC_CT vc_BSSGP_BVC[NUM_BVC_PER_NSE],
+ BssgpConfig cfg
+};
+
+const integer NUM_PCU := 3;
+type record length(NUM_PCU) of GbInstance GbInstances_PCU;
+type record length(NUM_PCU) of NSConfiguration NSConfigurations_PCU;
+type record length(NUM_PCU) of BssgpCellId BssgpCellIds;
+
+const integer NUM_SGSN := 1;
+type record length(NUM_SGSN) of GbInstance GbInstances_SGSN;
+type record length(NUM_SGSN) of NSConfiguration NSConfigurations_SGSN;
+
+type component test_CT {
+ var GbInstances_PCU g_pcu;
+ var GbInstances_SGSN g_sgsn;
+
+ port BSSGP_CT_PROC_PT PROC;
+
+ port TELNETasp_PT GBPVTY;
+
+ var boolean g_initialized := false;
+ var boolean g_use_echo := false;
+};
+
+type component BSSGP_ConnHdlr {
+ port BSSGP_PT PCU[NUM_PCU];
+ port BSSGP_PT PCU_SIG[NUM_PCU];
+ port BSSGP_PROC_PT PCU_PROC[NUM_PCU];
+ port BSSGP_PT SGSN[NUM_SGSN];
+ port BSSGP_PT SGSN_SIG[NUM_SGSN];
+ port BSSGP_PROC_PT SGSN_PROC[NUM_SGSN];
+
+ var BSSGP_ConnHdlrPars g_pars;
+ timer g_Tguard;
+ var LLC_Entities llc;
+}
+
+type record SGSN_ConnHdlrNetworkPars {
+ boolean expect_ptmsi,
+ boolean expect_auth,
+ boolean expect_ciph
+};
+
+type record BSSGP_ConnHdlrPars {
+ /* IMEI of the simulated ME */
+ hexstring imei,
+ /* IMSI of the simulated MS */
+ hexstring imsi,
+ /* MSISDN of the simulated MS (probably unused) */
+ hexstring msisdn,
+ /* P-TMSI allocated to the simulated MS */
+ OCT4 p_tmsi optional,
+ OCT3 p_tmsi_sig optional,
+ /* TLLI of the simulated MS */
+ OCT4 tlli,
+ OCT4 tlli_old optional,
+ RoutingAreaIdentificationV ra optional,
+ BssgpCellIds bssgp_cell_id,
+ float t_guard
+};
+
+private function f_cellid_to_RAI(in BssgpCellId cell_id) return RoutingAreaIdentificationV {
+ /* mcc_mnc is encoded as of 24.008 10.5.5.15 */
+ var BcdMccMnc mcc_mnc := cell_id.ra_id.lai.mcc_mnc;
+
+ var RoutingAreaIdentificationV ret := {
+ mccDigit1 := mcc_mnc[0],
+ mccDigit2 := mcc_mnc[1],
+ mccDigit3 := mcc_mnc[2],
+ mncDigit3 := mcc_mnc[3],
+ mncDigit1 := mcc_mnc[4],
+ mncDigit2 := mcc_mnc[5],
+ lac := int2oct(cell_id.ra_id.lai.lac, 16),
+ rac := int2oct(cell_id.ra_id.rac, 8)
+ }
+ return ret;
+};
+
+private function f_init_gb_pcu(inout GbInstance gb, charstring id, integer offset) runs on test_CT {
+ gb.vc_NS := NS_CT.create(id & "-NS(PCU)" & int2str(offset));
+ gb.vc_BSSGP := BSSGP_CT.create(id & "-BSSGP(PCU)" & int2str(offset));
+ /* connect lower end of BSSGP emulation with NS upper port */
+ connect(gb.vc_BSSGP:BSCP, gb.vc_NS:NS_SP);
+
+ gb.vc_NS.start(NSStart(mp_nsconfig_pcu[offset]));
+ gb.vc_BSSGP.start(BssgpStart(gb.cfg, id));
+
+ for (var integer i := 0; i < lengthof(gb.cfg.bvc); i := i + 1) {
+ connect(self:PROC, gb.vc_BSSGP:PROC);
+ gb.vc_BSSGP_BVC[i] := f_bssgp_get_bvci_ct(gb.cfg.bvc[i].bvci, PROC);
+ disconnect(self:PROC, gb.vc_BSSGP:PROC);
+ }
+}
+
+private function f_init_gb_sgsn(inout GbInstance gb, charstring id, integer offset) runs on test_CT {
+ gb.vc_NS := NS_CT.create(id & "-NS(SGSN)" & int2str(offset));
+ gb.vc_BSSGP := BSSGP_CT.create(id & "-BSSGP(SGSN)" & int2str(offset));
+ /* connect lower end of BSSGP emulation with NS upper port */
+ connect(gb.vc_BSSGP:BSCP, gb.vc_NS:NS_SP);
+
+ gb.vc_NS.start(NSStart(mp_nsconfig_sgsn[offset]));
+ gb.vc_BSSGP.start(BssgpStart(gb.cfg, id));
+
+ for (var integer i := 0; i < lengthof(gb.cfg.bvc); i := i + 1) {
+ connect(self:PROC, gb.vc_BSSGP:PROC);
+ gb.vc_BSSGP_BVC[i] := f_bssgp_get_bvci_ct(gb.cfg.bvc[i].bvci, PROC);
+ disconnect(self:PROC, gb.vc_BSSGP:PROC);
+ }
+}
+
+
+private function f_init_vty() runs on test_CT {
+ map(self:GBPVTY, system:GBPVTY);
+ f_vty_set_prompts(GBPVTY);
+ f_vty_transceive(GBPVTY, "enable");
+}
+
+/* mcc_mnc is 24.008 10.5.5.15 encoded. 262 42 */
+function f_init(BcdMccMnc mcc_mnc := '262F42'H) runs on test_CT {
+ var integer i;
+
+ if (g_initialized == true) {
+ return;
+ }
+ g_initialized := true;
+ g_pcu[0].cfg := {
+ nsei := 96,
+ sgsn_role := false,
+ bvc := { {
+ bvci := 196,
+ cell_id := {
+ ra_id := {
+ lai := {
+ mcc_mnc := mcc_mnc, lac := 13135},
+ rac := 0
+ },
+ cell_id := 20960
+ },
+ depth := BSSGP_DECODE_DEPTH_BSSGP
+ } }
+ };
+ g_pcu[1].cfg := {
+ nsei := 97,
+ sgsn_role := false,
+ bvc := { {
+ bvci := 210,
+ cell_id := {
+ ra_id := {
+ lai := {
+ mcc_mnc := mcc_mnc, lac := 13200},
+ rac := 0
+ },
+ cell_id := 20961
+ },
+ depth := BSSGP_DECODE_DEPTH_BSSGP
+ } }
+ };
+ g_pcu[2].cfg := {
+ nsei := 98,
+ sgsn_role := false,
+ bvc := { {
+ bvci := 220,
+ cell_id := {
+ ra_id := {
+ lai := {
+ mcc_mnc := mcc_mnc, lac := 13300},
+ rac := 0
+ },
+ cell_id := 20962
+ },
+ depth := BSSGP_DECODE_DEPTH_BSSGP
+ } }
+ };
+
+ g_sgsn[0].cfg := {
+ nsei := 101,
+ sgsn_role := true,
+ bvc := {
+ {
+ bvci := 196,
+ cell_id := {
+ ra_id := {
+ lai := {
+ mcc_mnc := mcc_mnc, lac := 13135},
+ rac := 0
+ },
+ cell_id := 20960
+ },
+ depth := BSSGP_DECODE_DEPTH_BSSGP
+ },
+ {
+ bvci := 210,
+ cell_id := {
+ ra_id := {
+ lai := {
+ mcc_mnc := mcc_mnc, lac := 13200},
+ rac := 0
+ },
+ cell_id := 20961
+ },
+ depth := BSSGP_DECODE_DEPTH_BSSGP
+ },
+ {
+ bvci := 220,
+ cell_id := {
+ ra_id := {
+ lai := {
+ mcc_mnc := mcc_mnc, lac := 13300},
+ rac := 0
+ },
+ cell_id := 20962
+ },
+ depth := BSSGP_DECODE_DEPTH_BSSGP
+ }
+ }
+ };
+
+ f_init_vty();
+ f_init_gb_sgsn(g_sgsn[0], "GbProxy_Test-SGSN0", 0);
+ f_sleep(4.0);
+ f_init_gb_pcu(g_pcu[0], "GbProxy_Test-PCU0", 0);
+ f_init_gb_pcu(g_pcu[1], "GbProxy_Test-PCU1", 1);
+ f_init_gb_pcu(g_pcu[2], "GbProxy_Test-PCU2", 2);
+}
+
+function f_cleanup() runs on test_CT {
+ self.stop;
+}
+
+type function void_fn(charstring id) runs on BSSGP_ConnHdlr;
+
+/* helper function to create, connect and start a BSSGP_ConnHdlr component */
+function f_start_handler(void_fn fn, charstring id, GbInstances_PCU pcu, GbInstances_SGSN sgsn, integer imsi_suffix,
+ float t_guard := 30.0)
+runs on test_CT return BSSGP_ConnHdlr {
+ var BSSGP_ConnHdlr vc_conn;
+
+ var BSSGP_ConnHdlrPars pars := {
+ imei := f_gen_imei(imsi_suffix),
+ imsi := f_gen_imsi(imsi_suffix),
+ msisdn := f_gen_msisdn(imsi_suffix),
+ p_tmsi := omit,
+ p_tmsi_sig := omit,
+ tlli := f_gprs_tlli_random(),
+ tlli_old := omit,
+ ra := omit,
+ bssgp_cell_id := { pcu[0].cfg.bvc[0].cell_id, pcu[1].cfg.bvc[0].cell_id, pcu[2].cfg.bvc[0].cell_id },
+ t_guard := t_guard
+ };
+
+ vc_conn := BSSGP_ConnHdlr.create(id);
+ // PDU side
+ connect(vc_conn:PCU[0], pcu[0].vc_BSSGP_BVC[0]:BSSGP_SP);
+ connect(vc_conn:PCU_SIG[0], pcu[0].vc_BSSGP_BVC[0]:BSSGP_SP_SIG);
+ connect(vc_conn:PCU_PROC[0], pcu[0].vc_BSSGP_BVC[0]:BSSGP_PROC);
+ connect(vc_conn:PCU[1], pcu[1].vc_BSSGP_BVC[0]:BSSGP_SP);
+ connect(vc_conn:PCU_SIG[1], pcu[1].vc_BSSGP_BVC[0]:BSSGP_SP_SIG);
+ connect(vc_conn:PCU_PROC[1], pcu[1].vc_BSSGP_BVC[0]:BSSGP_PROC);
+ connect(vc_conn:PCU[2], pcu[2].vc_BSSGP_BVC[0]:BSSGP_SP);
+ connect(vc_conn:PCU_SIG[2], pcu[2].vc_BSSGP_BVC[0]:BSSGP_SP_SIG);
+ connect(vc_conn:PCU_PROC[2], pcu[2].vc_BSSGP_BVC[0]:BSSGP_PROC);
+ // SGSN side
+ connect(vc_conn:SGSN[0], sgsn[0].vc_BSSGP_BVC[0]:BSSGP_SP);
+ connect(vc_conn:SGSN_SIG[0], sgsn[0].vc_BSSGP_BVC[0]:BSSGP_SP_SIG);
+ connect(vc_conn:SGSN_PROC[0], sgsn[0].vc_BSSGP_BVC[0]:BSSGP_PROC);
+
+ vc_conn.start(f_handler_init(fn, id, pars));
+ return vc_conn;
+}
+
+private altstep as_Tguard() runs on BSSGP_ConnHdlr {
+ [] g_Tguard.timeout {
+ setverdict(fail, "Tguard timeout");
+ mtc.stop;
+ }
+}
+
+/* first function called in every ConnHdlr */
+private function f_handler_init(void_fn fn, charstring id, BSSGP_ConnHdlrPars pars)
+runs on BSSGP_ConnHdlr {
+ /* do some common stuff like setting up g_pars */
+ g_pars := pars;
+
+ llc := f_llc_create(false);
+
+
+ g_Tguard.start(pars.t_guard);
+ activate(as_Tguard());
+
+ /* call the user-supplied test case function */
+ fn.apply(id);
+}
+
+/* TODO:
+ * Detach without Attach
+ * SM procedures without attach / RAU
+ * ATTACH / RAU
+ ** with / without authentication
+ ** with / without P-TMSI allocation
+ * re-transmissions of LLC frames
+ * PDP Context activation
+ ** with different GGSN config in SGSN VTY
+ ** with different PDP context type (v4/v6/v46)
+ ** timeout from GGSN
+ ** multiple / secondary PDP context
+ */
+
+private function f_TC_BVC_bringup(charstring id) runs on BSSGP_ConnHdlr {
+ f_sleep(5.0);
+ setverdict(pass);
+}
+
+testcase TC_BVC_bringup() runs on test_CT {
+ var BSSGP_ConnHdlr vc_conn;
+ f_init();
+
+ vc_conn := f_start_handler(refers(f_TC_BVC_bringup), testcasename(), g_pcu, g_sgsn, 51);
+ vc_conn.done;
+
+ f_cleanup();
+}
+
+friend function f_bssgp_suspend(integer ran_idx := 0) runs on BSSGP_ConnHdlr return OCT1 {
+ timer T := 5.0;
+ var PDU_BSSGP rx_pdu;
+ PCU_SIG[ran_idx].send(ts_BSSGP_SUSPEND(g_pars.tlli, g_pars.bssgp_cell_id[ran_idx].ra_id));
+ T.start;
+ alt {
+ [] PCU_SIG[ran_idx].receive(tr_BSSGP_SUSPEND_ACK(g_pars.tlli, g_pars.bssgp_cell_id[ran_idx].ra_id, ?)) -> value rx_pdu {
+ return rx_pdu.pDU_BSSGP_SUSPEND_ACK.suspend_Reference_Number.suspend_Reference_Number_value;
+ }
+ [] PCU_SIG[ran_idx].receive(tr_BSSGP_SUSPEND_NACK(g_pars.tlli, g_pars.bssgp_cell_id[ran_idx].ra_id, ?)) -> value rx_pdu {
+ setverdict(fail, "SUSPEND-NACK in response to SUSPEND for TLLI ", g_pars.tlli);
+ mtc.stop;
+ }
+ [] T.timeout {
+ setverdict(fail, "No SUSPEND-ACK in response to SUSPEND for TLLI ", g_pars.tlli);
+ mtc.stop;
+ }
+ }
+ return '00'O;
+}
+
+friend function f_bssgp_resume(OCT1 susp_ref, integer ran_idx := 0) runs on BSSGP_ConnHdlr {
+ timer T := 5.0;
+ PCU_SIG[ran_idx].send(ts_BSSGP_RESUME(g_pars.tlli, g_pars.bssgp_cell_id[ran_idx].ra_id, susp_ref));
+ T.start;
+ alt {
+ [] PCU_SIG[ran_idx].receive(tr_BSSGP_RESUME_ACK(g_pars.tlli, g_pars.bssgp_cell_id[ran_idx].ra_id));
+ [] PCU_SIG[ran_idx].receive(tr_BSSGP_RESUME_NACK(g_pars.tlli, g_pars.bssgp_cell_id[ran_idx].ra_id,
+?)) {
+ setverdict(fail, "RESUME-NACK in response to RESUME for TLLI ", g_pars.tlli);
+ mtc.stop;
+ }
+ [] T.timeout {
+ setverdict(fail, "No RESUME-ACK in response to SUSPEND for TLLI ", g_pars.tlli);
+ mtc.stop;
+ }
+ }
+}
+
+
+control {
+ execute( TC_BVC_bringup() );
+}
+
+
+}
diff --git a/gbproxy/README.md b/gbproxy/README.md
new file mode 100644
index 0000000..a86aad3
--- /dev/null
+++ b/gbproxy/README.md
@@ -0,0 +1,18 @@
+# GBProxy_Tests.ttcn
+
+* external interfaces
+ * Gb (emulates PCU side NS/BSSGP)
+ * Gb (emulates SGSN side NS/BSSGP)
+ * VTY
+
+{% dot gbproxy_tests.svg
+digraph G {
+ rankdir=LR;
+ GBP [label="IUT\nosmo-gbproxy",shape="box"];
+ ATS [label="ATS\nGBProxy_Tests.ttcn"];
+
+ ATS -> GBP [label="Gb (from SGSN)"];
+ GBP -> ATS [label="Gb (from PCU)"];
+ ATS -> SGSN [label="VTY"];
+}
+%}
diff --git a/gbproxy/gen_links.sh b/gbproxy/gen_links.sh
new file mode 100755
index 0000000..46898f4
--- /dev/null
+++ b/gbproxy/gen_links.sh
@@ -0,0 +1,94 @@
+#!/bin/bash
+
+BASEDIR=../deps
+
+. ../gen_links.sh.inc
+
+#DIR=$BASEDIR/titan.TestPorts.UNIX_DOMAIN_SOCKETasp/src
+#FILES="UD_PT.cc UD_PT.hh UD_PortType.ttcn UD_Types.ttcn"
+#gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.Libraries.TCCUsefulFunctions/src
+FILES="TCCInterface_Functions.ttcn TCCConversion_Functions.ttcn TCCConversion.cc TCCConversion.hh TCCInterface.cc TCCInterface_ip.h"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.TestPorts.Common_Components.Socket-API/src
+FILES="Socket_API_Definitions.ttcn"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.TestPorts.IPL4asp/src
+FILES="IPL4asp_Functions.ttcn IPL4asp_PT.cc IPL4asp_PT.hh IPL4asp_PortType.ttcn IPL4asp_Types.ttcn IPL4asp_discovery.cc IPL4asp_protocol_L234.hh"
+gen_links $DIR $FILES
+
+#DIR=$BASEDIR/titan.TestPorts.UNIX_DOMAIN_SOCKETasp/src
+#FILES="UD_PT.cc UD_PT.hh UD_PortType.ttcn UD_Types.ttcn"
+#gen_links $DIR $FILES
+
+# for Osmocom_VTY
+DIR=$BASEDIR/titan.TestPorts.TELNETasp/src
+FILES="TELNETasp_PT.cc TELNETasp_PT.hh TELNETasp_PortType.ttcn"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.ProtocolModules.NS_v7.3.0/src
+FILES="NS_Types.ttcn"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.ProtocolModules.BSSGP_v13.0.0/src
+FILES="BSSGP_EncDec.cc BSSGP_Types.ttcn"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.ProtocolModules.LLC_v7.1.0/src
+FILES="LLC_EncDec.cc LLC_Types.ttcn"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.ProtocolModules.SNDCP_v7.0.0/src
+FILES="SNDCP_Types.ttcn"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.ProtocolModules.MobileL3_v13.4.0/src
+FILES="MobileL3_CC_Types.ttcn MobileL3_CommonIE_Types.ttcn MobileL3_GMM_SM_Types.ttcn MobileL3_MM_Types.ttcn MobileL3_RRM_Types.ttcn MobileL3_SMS_Types.ttcn MobileL3_SS_Types.ttcn MobileL3_Types.ttcn"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.ProtocolModules.GTP_v13.5.0/src
+FILES="GTPC_EncDec.cc GTPC_Types.ttcn GTPU_EncDec.cc GTPU_Types.ttcn"
+gen_links $DIR $FILES
+
+# required by M3UA_Emulation
+DIR=$BASEDIR/titan.ProtocolModules.M3UA/src
+FILES="M3UA_Types.ttcn"
+gen_links $DIR $FILES
+
+# required by M3UA_Emulation
+DIR=$BASEDIR/titan.TestPorts.SCTPasp/src
+FILES="SCTPasp_PT.cc SCTPasp_PT.hh SCTPasp_PortType.ttcn SCTPasp_Types.ttcn"
+gen_links $DIR $FILES
+
+# required by M3UA Emulation
+DIR=$BASEDIR/titan.TestPorts.MTP3asp/src
+FILES="MTP3asp_PortType.ttcn MTP3asp_Types.ttcn"
+gen_links $DIR $FILES
+
+# required by SCCP Emulation
+DIR=$BASEDIR/titan.ProtocolEmulations.M3UA/src
+FILES="M3UA_Emulation.ttcn"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.ProtocolEmulations.SCCP/src
+FILES="SCCP_Emulation.ttcn SCCP_EncDec.cc SCCP_Mapping.ttcnpp SCCP_Types.ttcn SCCPasp_Types.ttcn"
+gen_links $DIR $FILES
+
+DIR=../library
+FILES="Misc_Helpers.ttcn General_Types.ttcn GSM_Types.ttcn GSM_RR_Types.ttcn Osmocom_Types.ttcn RLCMAC_Templates.ttcn RLCMAC_Types.ttcn RLCMAC_CSN1_Templates.ttcn RLCMAC_CSN1_Types.ttcn RLCMAC_EncDec.cc "
+FILES+="NS_Provider_IPL4.ttcn NS_Emulation.ttcnpp NS_CodecPort.ttcn NS_CodecPort_CtrlFunct.ttcn NS_CodecPort_CtrlFunctDef.cc "
+FILES+="BSSGP_Emulation.ttcnpp Osmocom_Gb_Types.ttcn "
+FILES+="PCUIF_Types.ttcn "
+FILES+="Osmocom_CTRL_Types.ttcn Osmocom_CTRL_Functions.ttcn Osmocom_CTRL_Adapter.ttcn "
+FILES+="Osmocom_VTY_Functions.ttcn "
+FILES+="LLC_Templates.ttcn L3_Templates.ttcn L3_Common.ttcn "
+# IPA_Emulation + dependencies
+FILES+="IPA_Types.ttcn IPA_Emulation.ttcnpp IPA_CodecPort.ttcn IPA_CodecPort_CtrlFunct.ttcn IPA_CodecPort_CtrlFunctDef.cc Native_Functions.ttcn Native_FunctionDefs.cc GSUP_Types.ttcn GSUP_Emulation.ttcn "
+FILES+="GTP_CodecPort.ttcn GTP_CodecPort_CtrlFunct.ttcn GTP_CodecPort_CtrlFunctDef.cc GTP_Emulation.ttcn
+GTP_Templates.ttcn IPCP_Types.ttcn "
+gen_links $DIR $FILES
+
+ignore_pp_results
diff --git a/gbproxy/osmo-gbproxy.cfg b/gbproxy/osmo-gbproxy.cfg
new file mode 100644
index 0000000..350ddf5
--- /dev/null
+++ b/gbproxy/osmo-gbproxy.cfg
@@ -0,0 +1,25 @@
+!
+! Osmocom Gb Proxy (0.9.0.404-6463) configuration saved from vty
+!!
+!
+line vty
+ no login
+!
+gbproxy
+ sgsn nsei 101
+ns
+ nse 101 nsvci 101
+ nse 101 remote-role sgsn
+ nse 101 encapsulation udp
+ nse 101 remote-ip 127.0.0.1
+ nse 101 remote-port 7777
+ timer tns-block 3
+ timer tns-block-retries 3
+ timer tns-reset 3
+ timer tns-reset-retries 3
+ timer tns-test 30
+ timer tns-alive 3
+ timer tns-alive-retries 10
+ encapsulation udp local-ip 127.0.0.1
+ encapsulation udp local-port 23000
+ encapsulation framerelay-gre enabled 0
diff --git a/gbproxy/regen_makefile.sh b/gbproxy/regen_makefile.sh
new file mode 100755
index 0000000..fbbd1b3
--- /dev/null
+++ b/gbproxy/regen_makefile.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+FILES="*.ttcn *.ttcnpp BSSGP_EncDec.cc LLC_EncDec.cc IPL4asp_PT.cc IPL4asp_discovery.cc TCCConversion.cc TCCInterface.cc NS_CodecPort_CtrlFunctDef.cc RLCMAC_EncDec.cc Native_FunctionDefs.cc TELNETasp_PT.cc IPA_CodecPort_CtrlFunctDef.cc GTPU_EncDec.cc GTPC_EncDec.cc GTP_CodecPort_CtrlFunctDef.cc SCCP_EncDec.cc SCTPasp_PT.cc "
+
+export CPPFLAGS_TTCN3="-DIPA_EMULATION_GSUP -DIPA_EMULATION_CTRL -DUSE_MTP3_DISTRIBUTOR -DBSSGP_EM_L3"
+
+../regen-makefile.sh GBProxy_Tests.ttcn $FILES
+
+sed -i -i 's/^LINUX_LIBS = -lxml2/LINUX_LIBS = -lxml2 -lsctp/' Makefile