diff --git a/library/SMPP_CodecPort.ttcn b/library/SMPP_CodecPort.ttcn
new file mode 100644
index 0000000..0ac81ae
--- /dev/null
+++ b/library/SMPP_CodecPort.ttcn
@@ -0,0 +1,65 @@
+module SMPP_CodecPort {
+
+/* Simple SMPP Codec Port, translating between raw TCP octetstring payload
+ * towards the IPL4asp port provider, and SMPP primitives
+ * which carry the decoded SMPP data types as payload.
+ *
+ * (C) 2018 by Harald Welte <laforge@gnumonks.org>
+ * All rights reserved.
+ *
+ * Released under the terms of GNU General Public License, Version 2 or
+ * (at your option) any later version.
+ */
+
+
+import from IPL4asp_PortType all;
+import from IPL4asp_Types all;
+import from SMPP_Types all;
+
+type record SMPP_RecvFrom {
+	ConnectionId	connId,
+	SMPP_PDU	msg
+}
+
+type record SMPP_Send {
+	ConnectionId	connId,
+	SMPP_PDU	msg
+}
+
+template (value) SMPP_Send ts_SMPP_Send(ConnectionId conn_id, template (value) SMPP_PDU msg) := {
+	connId := conn_id,
+	msg := msg
+}
+
+template SMPP_RecvFrom tr_SMPP_Recv(template ConnectionId conn_id, template SMPP_PDU msg) := {
+	connId := conn_id,
+	msg := msg
+}
+
+private function IPL4_to_SMPP_RecvFrom(in ASP_RecvFrom pin, out SMPP_RecvFrom pout) {
+	var integer rc;
+	pout.connId := pin.connId;
+	rc := f_decode_SMPP(pin.msg, pout.msg);
+} with { extension "prototype(fast)" }
+
+private function SMPP_to_IPL4_Send(in SMPP_Send pin, out ASP_Send pout) {
+	pout.connId := pin.connId;
+	pout.proto := { tcp := {} };
+	f_encode_SMPP(pin.msg, pout.msg);
+} with { extension "prototype(fast)" }
+
+type port SMPP_CODEC_PT message {
+	out	SMPP_Send;
+	in	SMPP_RecvFrom,
+		ASP_ConnId_ReadyToRelease,
+		ASP_Event;
+} with { extension "user IPL4asp_PT
+	out(SMPP_Send -> ASP_Send: function(SMPP_to_IPL4_Send))
+	in(ASP_RecvFrom -> SMPP_RecvFrom: function(IPL4_to_SMPP_RecvFrom);
+	   ASP_ConnId_ReadyToRelease -> ASP_ConnId_ReadyToRelease: simple;
+	   ASP_Event -> ASP_Event: simple)"
+}
+
+
+
+}
diff --git a/library/SMPP_CodecPort_CtrlFunct.ttcn b/library/SMPP_CodecPort_CtrlFunct.ttcn
new file mode 100644
index 0000000..2f6d616
--- /dev/null
+++ b/library/SMPP_CodecPort_CtrlFunct.ttcn
@@ -0,0 +1,52 @@
+module SMPP_CodecPort_CtrlFunct {
+
+  import from SMPP_CodecPort all;
+  import from IPL4asp_Types all;
+
+  external function f_IPL4_listen(
+    inout SMPP_CODEC_PT portRef,
+    in HostName locName,
+    in PortNumber locPort,
+    in ProtoTuple proto,
+    in OptionList options := {}
+  ) return Result;
+
+  external function f_IPL4_connect(
+    inout SMPP_CODEC_PT portRef,
+    in HostName remName,
+    in PortNumber remPort,
+    in HostName locName,
+    in PortNumber locPort,
+    in ConnectionId connId,
+    in ProtoTuple proto,
+    in OptionList options := {}
+  ) return Result;
+
+  external function f_IPL4_close(
+    inout SMPP_CODEC_PT portRef,
+    in ConnectionId id,
+    in ProtoTuple proto := { unspecified := {} }
+  ) return Result;
+
+  external function f_IPL4_setUserData(
+    inout SMPP_CODEC_PT portRef,
+    in ConnectionId id,
+    in UserData userData
+  ) return Result;
+
+  external function f_IPL4_getUserData(
+    inout SMPP_CODEC_PT portRef,
+    in ConnectionId id,
+    out UserData userData
+  ) return Result;
+
+  external function f_IPL4_setGetMsgLen(
+    inout SMPP_CODEC_PT portRef,
+    in ConnectionId id,
+    inout f_IPL4_getMsgLen f,
+    in ro_integer msgLenArgs
+  );
+
+
+}
+
diff --git a/library/SMPP_CodecPort_CtrlFunctDef.cc b/library/SMPP_CodecPort_CtrlFunctDef.cc
new file mode 100644
index 0000000..31603e4
--- /dev/null
+++ b/library/SMPP_CodecPort_CtrlFunctDef.cc
@@ -0,0 +1,66 @@
+#include "IPL4asp_PortType.hh"
+#include "SMPP_CodecPort.hh"
+#include "IPL4asp_PT.hh"
+
+namespace SMPP__CodecPort__CtrlFunct {
+
+  IPL4asp__Types::Result f__IPL4__listen(
+    SMPP__CodecPort::SMPP__CODEC__PT& portRef,
+    const IPL4asp__Types::HostName& locName,
+    const IPL4asp__Types::PortNumber& locPort,
+    const IPL4asp__Types::ProtoTuple& proto,
+    const IPL4asp__Types::OptionList& options)
+  {
+    return f__IPL4__PROVIDER__listen(portRef, locName, locPort, proto, options);
+  }
+  
+  IPL4asp__Types::Result f__IPL4__connect(
+    SMPP__CodecPort::SMPP__CODEC__PT& portRef,
+    const IPL4asp__Types::HostName& remName,
+    const IPL4asp__Types::PortNumber& remPort,
+    const IPL4asp__Types::HostName& locName,
+    const IPL4asp__Types::PortNumber& locPort,
+    const IPL4asp__Types::ConnectionId& connId,
+    const IPL4asp__Types::ProtoTuple& proto,
+    const IPL4asp__Types::OptionList& options)
+  {
+    return f__IPL4__PROVIDER__connect(portRef, remName, remPort,
+                                      locName, locPort, connId, proto, options);
+  }
+
+  IPL4asp__Types::Result f__IPL4__close(
+    SMPP__CodecPort::SMPP__CODEC__PT& portRef, 
+    const IPL4asp__Types::ConnectionId& connId, 
+    const IPL4asp__Types::ProtoTuple& proto)
+  {
+      return f__IPL4__PROVIDER__close(portRef, connId, proto);
+  }
+
+  IPL4asp__Types::Result f__IPL4__setUserData(
+    SMPP__CodecPort::SMPP__CODEC__PT& portRef,
+    const IPL4asp__Types::ConnectionId& connId,
+    const IPL4asp__Types::UserData& userData)
+  {
+    return f__IPL4__PROVIDER__setUserData(portRef, connId, userData);
+  }
+  
+  IPL4asp__Types::Result f__IPL4__getUserData(
+    SMPP__CodecPort::SMPP__CODEC__PT& portRef,
+    const IPL4asp__Types::ConnectionId& connId,
+    IPL4asp__Types::UserData& userData)
+  {
+    return f__IPL4__PROVIDER__getUserData(portRef, connId, userData);
+  }
+
+  void f__IPL4__setGetMsgLen(
+    SMPP__CodecPort::SMPP__CODEC__PT& portRef,
+    const IPL4asp__Types::ConnectionId& connId,
+    Socket__API__Definitions::f__getMsgLen& f,
+    const Socket__API__Definitions::ro__integer& msgLenArgs)
+  {
+    return f__IPL4__PROVIDER__setGetMsgLen(portRef, connId, f, msgLenArgs);
+  }
+
+
+}
+