pespin has submitted this change. ( 
https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/36642?usp=email )

Change subject: asterisk: Initial steps to emulate IMS core
......................................................................

asterisk: Initial steps to emulate IMS core

Add the initial infrastructure to manage 2 SIPmsg_PT ports, one for the
local SIP UAs and one for the IMS core.
Still missing:
* Trigger Asterisk (through AMI) to do the initial connect + register to it
* Configure ipsec after Unauthorized response from IMS core

Change-Id: Ibbbadd54b7facf4ef7384499704e742f482a1252
---
M asterisk/Asterisk_Tests.default
M asterisk/Asterisk_Tests.ttcn
A asterisk/IMS_ConnectionHandler.ttcn
3 files changed, 145 insertions(+), 7 deletions(-)

Approvals:
  fixeria: Looks good to me, but someone else must approve
  osmith: Looks good to me, but someone else must approve
  Jenkins Builder: Verified
  pespin: Looks good to me, approved




diff --git a/asterisk/Asterisk_Tests.default b/asterisk/Asterisk_Tests.default
index 0996545..622a5a9 100644
--- a/asterisk/Asterisk_Tests.default
+++ b/asterisk/Asterisk_Tests.default
@@ -4,7 +4,8 @@
 mtc.FileMask := ERROR | WARNING | PARALLEL | VERDICTOP;

 [TESTPORT_PARAMETERS]
-*.*.DEBUG := "yes"
+#*.*.DEBUG := "yes"
+#*.*.debug := "enabled"
 *.AMI.PROMPT1 := "Asterisk Call Manager/9.0.0\n"
 *.AMI.PROMPT2 := "\n"
 #*.AMI.REGEX_PROMPT1 := "^Asterisk Call Manager.*$"
@@ -16,11 +17,20 @@
 *.AMI.CTRL_READMODE := "buffered"
 *.AMI.CTRL_CLIENT_CLEANUP_LINEFEED := "yes"
 *.AMI.CTRL_CRLF := "yes"
-*.SIP.local_sip_port := "5060"
-*.SIP.default_local_address := "127.0.0.2"
-*.SIP.default_sip_protocol := "UDP"
-*.SIP.default_dest_port := "5060"
-*.SIP.default_dest_address := "127.0.0.1"
+# Local SIP UAs:
+Asterisk_Tests_LOCAL_SIP_EMU.SIP.default_sip_protocol := "UDP";
+Asterisk_Tests_LOCAL_SIP_EMU.SIP.local_sip_port := "5060"
+Asterisk_Tests_LOCAL_SIP_EMU.SIP.default_local_address := "127.0.0.2"
+Asterisk_Tests_LOCAL_SIP_EMU.SIP.default_dest_port := "5060"
+Asterisk_Tests_LOCAL_SIP_EMU.SIP.default_dest_address := "127.0.0.1"
+# IMS Core:
+Asterisk_Tests_IMS_SIP_EMU.SIP.default_sip_protocol := "TCP";
+Asterisk_Tests_IMS_SIP_EMU.SIP.listen_enabled := "enabled";
+Asterisk_Tests_IMS_SIP_EMU.SIP.local_sip_port := "5060"
+Asterisk_Tests_IMS_SIP_EMU.SIP.default_local_address := "127.0.0.3"
+# Disabled for Server mode:
+#Asterisk_Tests_IMS_SIP_EMU.SIP.default_dest_address := "127.0.0.1"
+#Asterisk_Tests_IMS_SIP_EMU.SIP.default_dest_port := "5060"

 [MODULE_PARAMETERS]

diff --git a/asterisk/Asterisk_Tests.ttcn b/asterisk/Asterisk_Tests.ttcn
index caa941c..c94f97f 100644
--- a/asterisk/Asterisk_Tests.ttcn
+++ b/asterisk/Asterisk_Tests.ttcn
@@ -27,6 +27,7 @@
 import from SIP_Templates all;

 import from SIP_ConnectionHandler all;
+import from IMS_ConnectionHandler all;

 modulepar {
        charstring mp_local_sip_host := "127.0.0.2";
@@ -34,15 +35,24 @@
        charstring mp_remote_sip_host := "127.0.0.1";
        integer mp_remote_sip_port := 5060;

+       charstring mp_local_ims_host := "127.0.0.3";
+       integer mp_local_ims_port := 5060;
+
        /* Asterisk AMI: */
        charstring mp_ami_user := "test_user";
        charstring mp_ami_secret := "1234";
 }

 type component test_CT {
+       /* Manages all local VoIP users Asterisk is serving: */
        var SIP_Emulation_CT vc_SIP;
+       /* Manages the IMS server Asterisk connects to: */
+       var SIP_Emulation_CT vc_IMS;
+
        port TELNETasp_PT AMI;
+
        port Coord_PT COORD;
+       port IMSCoord_PT IMS_COORD;
 }

 const charstring broadcast_sip_extension := "0500";
@@ -64,9 +74,24 @@
        f_ami_action_login(AMI, mp_ami_user, mp_ami_secret);
 }

+/* Local SIP UAs */
+private function f_init_sip_local() runs on test_CT {
+       var charstring id := "Asterisk_Tests_LOCAL_SIP_EMU";
+       f_init_sip(vc_SIP, id);
+}
+
+/* IMS Server connection */
+private function f_init_sip_ims() runs on test_CT {
+       var charstring id := "Asterisk_Tests_IMS_SIP_EMU";
+       f_init_sip(vc_IMS, id);
+}
+
 function f_init() runs on test_CT {
+       var charstring id;
+
        f_init_ami();
-       f_init_sip(vc_SIP, "Asterisk_Test_SIP_EMU");
+       f_init_sip_local();
+       f_init_sip_ims();
        log("end of f_init");
 }

diff --git a/asterisk/IMS_ConnectionHandler.ttcn 
b/asterisk/IMS_ConnectionHandler.ttcn
new file mode 100644
index 0000000..a1baeb4
--- /dev/null
+++ b/asterisk/IMS_ConnectionHandler.ttcn
@@ -0,0 +1,88 @@
+/* Component implementing a IMS server towards Asterisk's IMS UE
+ * (C) 2024 by sysmocom - s.f.m.c. GmbH <i...@sysmocom.de>
+ * Author: Pau Espin Pedrol <pes...@sysmocom.de>
+ * All rights reserved.
+ *
+ * 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
+ */
+module IMS_ConnectionHandler {
+
+import from TCCOpenSecurity_Functions all;
+import from General_Types all;
+import from Osmocom_Types all;
+import from Native_Functions all;
+import from Misc_Helpers all;
+
+import from SDP_Types all;
+import from SDP_Templates all;
+
+import from SIP_Emulation all;
+import from SIPmsg_Types all;
+import from SIP_Templates all;
+
+type port IMSCoord_PT message
+{
+       inout charstring;
+} with { extension "internal" };
+
+const charstring IMS_COORD_CMD_REGISTERED := "COORD_CMD_REGISTERED";
+
+type component IMS_ConnHdlr extends SIP_ConnHdlr {
+       var charstring g_name;
+       var IMS_ConnHdlrPars g_pars;
+       timer g_Tguard;
+       var PDU_SIP_Request g_rx_sip_req;
+       var PDU_SIP_Response g_rx_sip_resp;
+
+       port IMSCoord_PT COORD;
+}
+type record of IMS_ConnHdlr IMS_ConnHdlrList;
+
+type record IMS_ConnHdlrPars {
+       float t_guard,
+       charstring remote_sip_host,
+       uint16_t remote_sip_port,
+       charstring user,
+       charstring display_name,
+       charstring password,
+       SipUrl registrar_sip_req_uri,
+       SipAddr registrar_sip_record,
+       CallidString registrar_sip_call_id,
+       integer registrar_sip_seq_nr,
+       Via local_via,
+       SipUrl local_sip_url_ext,
+       SipAddr local_sip_record,
+       Contact local_contact,
+       IMS_CallPars cp optional
+}
+type record of IMS_ConnHdlrPars IMS_ConnHdlrParsList;
+
+type record IMS_CallParsMT {
+       /* Whether to wait for COORD.receive(COORD_CMD_PICKUP) before accepting 
the call. */
+       boolean wait_coord_cmd_pickup,
+       /* Whether to expect CANCEL instead of ACK as answer to our OK */
+       boolean exp_cancel
+}
+
+type record IMS_CallPars {
+       SipAddr calling optional,
+       SipAddr called optional,
+
+       SipAddr from_addr optional,
+       SipAddr to_addr optional,
+
+       CallidString sip_call_id,
+       integer sip_seq_nr,
+       charstring sip_body optional,
+
+       charstring local_rtp_addr,
+       uint16_t local_rtp_port,
+
+       SDP_Message peer_sdp optional,
+       IMS_CallParsMT mt
+}
+
+}

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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: Ibbbadd54b7facf4ef7384499704e742f482a1252
Gerrit-Change-Number: 36642
Gerrit-PatchSet: 2
Gerrit-Owner: pespin <pes...@sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: fixeria <vyanits...@sysmocom.de>
Gerrit-Reviewer: osmith <osm...@sysmocom.de>
Gerrit-Reviewer: pespin <pes...@sysmocom.de>
Gerrit-MessageType: merged

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