diff --git a/controller/framework/Fxlib.py b/controller/framework/Fxlib.py
index 9950866..bfb691a 100644
--- a/controller/framework/Fxlib.py
+++ b/controller/framework/Fxlib.py
@@ -19,10 +19,9 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
 
-EVIO_VER_MJR = "20"
-EVIO_VER_MNR = "7"
-EVIO_VER_REV = "2"
-EVIO_VER_REL = "{0}.{1}.{2}".format(EVIO_VER_MJR, EVIO_VER_MNR, EVIO_VER_REV)
+import framework.Version as ver
+
+EVIO_VER_REL = "{0}.{1}.{2}".format(ver.EVIO_VER_MJR, ver.EVIO_VER_MNR, ver.EVIO_VER_REV)
 
 CONFIG = {
     "CFx": {
diff --git a/controller/framework/Modlib.py b/controller/framework/Modlib.py
index aeaa5ed..97ab833 100644
--- a/controller/framework/Modlib.py
+++ b/controller/framework/Modlib.py
@@ -20,11 +20,11 @@
 # THE SOFTWARE.
 
 import subprocess
-
+import framework.Version as ver
 
 CTL_CREATE_CTRL_LINK = {
     "EVIO": {
-        "ProtocolVersion": 5,
+        "ProtocolVersion": ver.EVIO_VER_CTL,
         "TransactionId": 0,
         "ControlType": "TincanRequest",
         "Request": {
@@ -38,7 +38,7 @@ CTL_CREATE_CTRL_LINK = {
 }
 CTL_CONFIGURE_LOGGING = {
     "EVIO": {
-        "ProtocolVersion": 5,
+        "ProtocolVersion": ver.EVIO_VER_CTL,
         "TransactionId": 0,
         "ControlType": "TincanRequest",
         "Request": {
@@ -55,7 +55,7 @@ CTL_CONFIGURE_LOGGING = {
 }
 CTL_QUERY_TUNNEL_INFO = {
     "EVIO": {
-        "ProtocolVersion": 5,
+        "ProtocolVersion": ver.EVIO_VER_CTL,
         "TransactionId": 0,
         "ControlType": "TincanRequest",
         "Request": {
@@ -67,7 +67,7 @@ CTL_QUERY_TUNNEL_INFO = {
 }
 CTL_CREATE_TUNNEL = {
     "EVIO": {
-        "ProtocolVersion": 5,
+        "ProtocolVersion": ver.EVIO_VER_CTL,
         "ControlType": "TincanRequest",
         "TransactionId": 0,
         "Request": {
@@ -84,7 +84,7 @@ CTL_CREATE_TUNNEL = {
 }
 CTL_CREATE_LINK = {
     "EVIO": {
-        "ProtocolVersion": 5,
+        "ProtocolVersion": ver.EVIO_VER_CTL,
         "TransactionId": 0,
         "ControlType": "TincanRequest",
         "Request": {
@@ -102,7 +102,7 @@ CTL_CREATE_LINK = {
 }
 CTL_REMOVE_TUNNEL = {
     "EVIO": {
-        "ProtocolVersion": 5,
+        "ProtocolVersion": ver.EVIO_VER_CTL,
         "TransactionId": 0,
         "ControlType": "TincanRequest",
         "Request": {
@@ -114,7 +114,7 @@ CTL_REMOVE_TUNNEL = {
 }
 CTL_REMOVE_LINK = {
     "EVIO": {
-        "ProtocolVersion": 5,
+        "ProtocolVersion": ver.EVIO_VER_CTL,
         "TransactionId": 0,
         "ControlType": "TincanRequest",
         "Request": {
@@ -126,7 +126,7 @@ CTL_REMOVE_LINK = {
 }
 RESP = {
     "EVIO": {
-        "ProtocolVersion": 5,
+        "ProtocolVersion": ver.EVIO_VER_CTL,
         "TransactionId": 0,
         "ControlType": "TincanResponse",
         "Request": {
@@ -139,7 +139,7 @@ RESP = {
 }
 CTL_QUERY_LINK_STATS = {
     "EVIO": {
-        "ProtocolVersion": 5,
+        "ProtocolVersion": ver.EVIO_VER_CTL,
         "TransactionId": 0,
         "ControlType": "TincanRequest",
         "Request": {
@@ -150,7 +150,7 @@ CTL_QUERY_LINK_STATS = {
 }
 CTL_QUERY_CAS = {
     "EVIO": {
-        "ProtocolVersion": 5,
+        "ProtocolVersion": ver.EVIO_VER_CTL,
         "TransactionId": 0,
         "ControlType": "TincanRequest",
         "Request": {
diff --git a/controller/framework/Version.py b/controller/framework/Version.py
new file mode 100644
index 0000000..de4a940
--- /dev/null
+++ b/controller/framework/Version.py
@@ -0,0 +1,26 @@
+# EdgeVPNio
+# Copyright 2020, University of Florida
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+EVIO_VER_MJR = 0
+EVIO_VER_MNR = 0
+EVIO_VER_REV = 0
+EVIO_VER_BLD = 0
+EVIO_VER_CTL = 0
\ No newline at end of file
diff --git a/controller/modules/TincanInterface.py b/controller/modules/TincanInterface.py
index c3fd313..5b2c559 100644
--- a/controller/modules/TincanInterface.py
+++ b/controller/modules/TincanInterface.py
@@ -30,7 +30,7 @@ import traceback
 from distutils import spawn
 import framework.Modlib as modlib
 from framework.ControllerModule import ControllerModule
-
+import framework.Version as ver
 
 class TincanInterface(ControllerModule):
     def __init__(self, cfx_handle, module_config, module_name):
@@ -68,7 +68,7 @@ class TincanInterface(ControllerModule):
                     if sock == self._sock_svr:
                         data = sock.recvfrom(self._cm_config["MaxReadSize"])
                         ctl = json.loads(data[0].decode("utf-8"))
-                        if ctl["EVIO"]["ProtocolVersion"] != 5:
+                        if ctl["EVIO"]["ProtocolVersion"] != ver.EVIO_VER_CTL:
                             raise ValueError("Invalid control version detected")
                         # Get the original CBT if this is the response
                         if ctl["EVIO"]["ControlType"] == "TincanResponse":
diff --git a/tincan/BUILD.gn b/tincan/BUILD.gn
index 5aa8044..5da080b 100644
--- a/tincan/BUILD.gn
+++ b/tincan/BUILD.gn
@@ -20,6 +20,7 @@ executable("tincan") {
         if (is_linux) {
             sources += [
                 "trunk/src/linux/tapdev_lnx.cc",
+                "trunk/src/linux/lnx_exception.cc"
             ]
 
             include_dirs += [
diff --git a/tincan/trunk/include/basic_tunnel.h b/tincan/trunk/include/basic_tunnel.h
index 02789c4..5f1fe0d 100644
--- a/tincan/trunk/include/basic_tunnel.h
+++ b/tincan/trunk/include/basic_tunnel.h
@@ -159,7 +159,7 @@ protected:
   void SetIgnoredNetworkInterfaces(
     const vector<string>& ignored_list);
 
-  unique_ptr<VirtualLink> CreateVlink(
+  virtual unique_ptr<VirtualLink> CreateVlink(
     unique_ptr<VlinkDescriptor> vlink_desc,
     unique_ptr<PeerDescriptor>
     peer_desc, cricket::IceRole ice_role);
diff --git a/tincan/trunk/include/control_dispatch.h b/tincan/trunk/include/control_dispatch.h
index 83bce3c..b86df85 100644
--- a/tincan/trunk/include/control_dispatch.h
+++ b/tincan/trunk/include/control_dispatch.h
@@ -72,17 +72,12 @@ private:
       msg_ = "No connection to Controller exists. "
         "Create one with the set_ctrl_endpoint control operation";
     }
-    virtual ~DisconnectedControllerHandle() = default;
+    ~DisconnectedControllerHandle() override = default;
   private:
-    virtual void Deliver(
-      TincanControl &) {
-      RTC_LOG(LS_INFO) << msg_ << "\n";
-    }
-    virtual void Deliver(
-      unique_ptr<TincanControl>)
-    {
-      RTC_LOG(LS_INFO) << msg_ << "\n";
-    }
+    void Deliver(
+      TincanControl &) override {}
+    void Deliver(
+      unique_ptr<TincanControl>) override {}
     string msg_;
   };
 }; // ControlDispatch
diff --git a/tincan/trunk/include/control_listener.h b/tincan/trunk/include/control_listener.h
index e363612..530c3a7 100644
--- a/tincan/trunk/include/control_listener.h
+++ b/tincan/trunk/include/control_listener.h
@@ -46,7 +46,7 @@ class ControlListener :
 {
 public:
   ControlListener(unique_ptr<ControlDispatch> control_dispatch);
-  ~ControlListener();
+  ~ControlListener() override;
   void ReadPacketHandler(
     AsyncPacketSocket * socket,
     const char * data,
@@ -63,10 +63,7 @@ public:
   void CreateControllerLink(
     unique_ptr<SocketAddress> controller_addr
     ) override;
-  ControllerLink & GetControllerLink() override
-  {
-    return *this;
-  }
+  ControllerLink & GetControllerLink() override;
 
   std::unique_ptr<Thread> ctrl_thread_;
   //thread to keep UDP socket listening run from tincan.cc
diff --git a/tincan/trunk/include/linux/lnx_exception.h b/tincan/trunk/include/linux/lnx_exception.h
index 4232ef4..c3f2e69 100644
--- a/tincan/trunk/include/linux/lnx_exception.h
+++ b/tincan/trunk/include/linux/lnx_exception.h
@@ -32,24 +32,10 @@ class LnxException : virtual public exception
 protected:
   string emsg;
 public:
-  LnxException(const string &arg, const char *file, int line)
-  {
-    ostringstream ostr;
-    ostr << file << ":" << line << ": " << arg << "@" << strerror(errno);
-    emsg = ostr.str();
-  }
-
-  LnxException()
-  {}
-
-  ~LnxException()
-  {}
-
-  const char* what() const _NOEXCEPT override
-  {
-    return emsg.c_str();
-  }
-
+  LnxException(const string &arg, const char *file, int line);
+  LnxException();
+  ~LnxException() override;
+  const char* what() const _NOEXCEPT override;
 };
 } // linux
 } // tincan
diff --git a/tincan/trunk/include/linux/tapdev_lnx.h b/tincan/trunk/include/linux/tapdev_lnx.h
index 76c62d6..bb12fc2 100644
--- a/tincan/trunk/include/linux/tapdev_lnx.h
+++ b/tincan/trunk/include/linux/tapdev_lnx.h
@@ -58,7 +58,7 @@ class TapDevLnx :
 {
 public:
   TapDevLnx();
-  virtual ~TapDevLnx();
+  ~TapDevLnx() override;
   sigslot::signal1<AsyncIo *> read_completion_;
   sigslot::signal1<AsyncIo *> write_completion_;
   void Open(
diff --git a/tincan/trunk/include/tap_frame.h b/tincan/trunk/include/tap_frame.h
index 936c720..f483662 100644
--- a/tincan/trunk/include/tap_frame.h
+++ b/tincan/trunk/include/tap_frame.h
@@ -56,7 +56,7 @@ public:
   //Copies the specifed amount of data into the TFB.
   TapFrame(uint8_t* data, uint32_t len);
 
-  virtual ~TapFrame();
+  ~TapFrame() override;
 
   //Copies the TFB from the rhs frame to the lhs
   TapFrame &operator= (TapFrame & rhs);
@@ -240,6 +240,7 @@ private:
 };
 ///////////////////////////////////////////////////////////////////////////////
 // IP4Mapper patches IP4 addresses
+/*
 class IP4AddressMapper
 {
 public:
@@ -281,5 +282,6 @@ private:
   TapFrame & tf_;
   TapFrameProperties & fp_;
 };
+*/
 } //namespace tincan
 #endif  // TINCAN_TAP_FRAME_H_
diff --git a/tincan/trunk/include/tincan_base.h b/tincan/trunk/include/tincan_base.h
index b6c89f7..ee98417 100644
--- a/tincan/trunk/include/tincan_base.h
+++ b/tincan/trunk/include/tincan_base.h
@@ -43,6 +43,7 @@
 #include <utility>
 #include <unordered_map>
 #include <vector>
+#include "tincan_version.h"
 namespace tincan
 {
   using MacAddressType = std::array<uint8_t, 6>;
@@ -153,12 +154,6 @@ namespace tincan
         }
       }
     }
-
-    static const uint16_t kTincanVerMjr = 3;
-    static const uint16_t kTincanVerMnr = 0;
-    static const uint16_t kTincanVerRev = 0;
-    static const uint8_t kTincanControlVer = 5;
-    static const uint8_t kTincanLinkVer = 1;
     static const uint16_t kMaxMtuSize = 1500;
     static const uint16_t kTapHeaderSize = 2;
     static const uint16_t kEthHeaderSize = 14;
diff --git a/tincan/trunk/include/tincan_version.h b/tincan/trunk/include/tincan_version.h
new file mode 100644
index 0000000..9c8828b
--- /dev/null
+++ b/tincan/trunk/include/tincan_version.h
@@ -0,0 +1,33 @@
+/*
+* EdgeVPNio
+* Copyright 2020, University of Florida
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to deal
+* in the Software without restriction, including without limitation the rights
+* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+* copies of the Software, and to permit persons to whom the Software is
+* furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+* THE SOFTWARE.
+*/
+#ifndef TINCAN_VERSION_H_
+#define TINCAN_VERSION_H_
+namespace tincan
+{
+    static const uint16_t kTincanVerMjr = 0;
+    static const uint16_t kTincanVerMnr = 0;
+    static const uint16_t kTincanVerRev = 0;
+    static const uint16_t kTincanVerBld = 0;
+    static const uint8_t kTincanControlVer = 0;
+} // namespace tincan
+#endif // TINCAN_VERSION_H_
diff --git a/tincan/trunk/src/control_listener.cc b/tincan/trunk/src/control_listener.cc
index 88e736d..f7056c3 100644
--- a/tincan/trunk/src/control_listener.cc
+++ b/tincan/trunk/src/control_listener.cc
@@ -86,6 +86,12 @@ ControlListener::CreateControllerLink(
     sf->CreateAsyncSocket(ctrl_addr_->family(), SOCK_DGRAM));
 }
 
+ControllerLink & 
+ControlListener::GetControllerLink()
+{
+  return *this;
+}
+
 void
 ControlListener::Run()
 {
diff --git a/tincan/trunk/src/linux/lnx_exception.cc b/tincan/trunk/src/linux/lnx_exception.cc
new file mode 100644
index 0000000..b2adcee
--- /dev/null
+++ b/tincan/trunk/src/linux/lnx_exception.cc
@@ -0,0 +1,51 @@
+/*
+* EdgeVPNio
+* Copyright 2020, University of Florida
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to deal
+* in the Software without restriction, including without limitation the rights
+* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+* copies of the Software, and to permit persons to whom the Software is
+* furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+* THE SOFTWARE.
+*/
+#include "tincan_base.h"
+#include <errno.h>
+#include "lnx_exception.h"
+
+namespace tincan
+{
+namespace linux
+{
+LnxException::LnxException(const string &arg, const char *file, int line)
+{
+  ostringstream ostr;
+  ostr << file << ":" << line << ": " << arg << "@" << strerror(errno);
+  emsg = ostr.str();
+}
+
+LnxException::LnxException()
+{}
+
+LnxException::~LnxException()
+{}
+
+const char* 
+LnxException::what() const _NOEXCEPT
+{
+  return emsg.c_str();
+}
+
+} // linux
+} // tincan
diff --git a/tincan/trunk/src/tincan_control.cc b/tincan/trunk/src/tincan_control.cc
index 18fe632..e93ce1e 100644
--- a/tincan/trunk/src/tincan_control.cc
+++ b/tincan/trunk/src/tincan_control.cc
@@ -77,7 +77,7 @@ const Json::StaticString TincanControl::VnetDescription("VnetDescription");
 const Json::StaticString TincanControl::Vlinks("Vlinks");
 
 TincanControl::TincanControl() :
-  proto_ver_(tp.kTincanControlVer),
+  proto_ver_(kTincanControlVer),
   tag_(NextTagValue()),
   type_(CTTincanRequest),
   dict_req_(nullptr),
@@ -86,7 +86,7 @@ TincanControl::TincanControl() :
 
 TincanControl::TincanControl(
   unique_ptr<Json::Value> req) :
-  proto_ver_(tp.kTincanControlVer),
+  proto_ver_(kTincanControlVer),
   tag_(NextTagValue()),
   type_(CTTincanRequest),
   dict_req_(req.release()),
@@ -96,7 +96,7 @@ TincanControl::TincanControl(
 TincanControl::TincanControl(
   unique_ptr<Json::Value> req,
   unique_ptr<Json::Value> resp) :
-  proto_ver_(tp.kTincanControlVer),
+  proto_ver_(kTincanControlVer),
   tag_(NextTagValue()),
   type_(CTTincanRequest),
   dict_req_(req.release()),
@@ -128,7 +128,7 @@ TincanControl::TincanControl(
     throw TCEXCEPT(oss.str().c_str());
   }
   uint32_t ver = ctrl[EVIO][ProtocolVersion].asUInt();
-  if(ver != tp.kTincanControlVer)
+  if(ver != kTincanControlVer)
   {
     ostringstream oss;
     oss << "Invalid EVIO protocol version in control header (" << ver << ")";
diff --git a/tincan/trunk/src/tincan_main.cc b/tincan/trunk/src/tincan_main.cc
index 67c219f..3b3f6e3 100644
--- a/tincan/trunk/src/tincan_main.cc
+++ b/tincan/trunk/src/tincan_main.cc
@@ -36,9 +36,10 @@ int main(int argc, char **argv)
   try {
     tp.ParseCmdlineArgs(argc, argv);
     if(tp.kVersionCheck) {
-      cout << tp.kTincanVerMjr << "." 
-        << tp.kTincanVerMnr << "." 
-        << tp.kTincanVerRev << endl;
+      cout << kTincanVerMjr << "." 
+        << kTincanVerMnr << "." 
+        << kTincanVerRev << "."
+        << kTincanVerBld << endl;
     }
     else if(tp.kNeedsHelp) {
       std::cout << "-v         Version check.\n" <<