MME2 changes - Propped commits from openmme/paging branch. Added scripts
for code gen

Change-Id: Ie55032217232214ac8544ca76ea34335205329e4
diff --git a/src/gtpV2Codec/ieClasses/paaIe.cpp b/src/gtpV2Codec/ieClasses/paaIe.cpp
new file mode 100644
index 0000000..887abb1
--- /dev/null
+++ b/src/gtpV2Codec/ieClasses/paaIe.cpp
@@ -0,0 +1,174 @@
+/*
+ * Copyright 2019-present Infosys Limited  
+ *   
+ * SPDX-License-Identifier: Apache-2.0    
+ */
+/******************************************************************************
+ *
+ * This is an auto generated file.
+ * Please do not edit this file.
+ * All edits to be made through template source file
+ * <TOP-DIR/scripts/GtpV2StackCodeGen/tts/ietemplate.cpp.tt>
+ ******************************************************************************/
+
+#include "paaIe.h"
+#include "dataTypeCodecUtils.h"
+
+PaaIe::PaaIe() 
+{
+    ieType = 79;
+    // TODO
+
+}
+
+PaaIe::~PaaIe() {
+    // TODO Auto-generated destructor stub
+}
+
+bool PaaIe::encodePaaIe(MsgBuffer &buffer, PaaIeData const &data)
+{
+    buffer.skipBits(5);
+
+    if (!(data.pdnType<= 3))
+    {
+        errorStream.add((char *)"Data validation failure: pdnType\n");
+        return false; 
+    }
+    if(!(buffer.writeBits(data.pdnType, 3)))
+    {
+        errorStream.add((char *)"Encoding of pdnType failed\n");
+        return false;
+    }
+    if (data.pdnType == 2 || data.pdnType == 3)
+    {
+        if (!(buffer.writeUint8(data.ipv6PrefixLength)))
+        {
+    errorStream.add((char *)"Encoding of ipv6PrefixLength failed\n");
+    return false;
+        }
+    }
+    if (data.pdnType == 2 || data.pdnType == 3)
+    {
+        if (!(DataTypeCodecUtils::encodeIpAddressV6(buffer, data.ipV6Address)))
+        {
+            errorStream.add((char *)"Encoding of ipV6Address failed\n");
+            return false;
+        }
+    }
+    if (data.pdnType == 1)
+    {
+        if (!(DataTypeCodecUtils::encodeIpAddressV4(buffer, data.ipV4Address)))
+        {
+            errorStream.add((char *)"Encoding of ipV4Address failed\n");
+            return false;
+        }
+    }
+
+    return true;
+}
+
+bool PaaIe::decodePaaIe(MsgBuffer &buffer, PaaIeData &data, Uint16 length)
+{     
+    // TODO optimize the length checks
+    
+    Uint16 ieBoundary = buffer.getCurrentIndex() + length;
+    buffer.skipBits(5);
+    if (buffer.getCurrentIndex() > ieBoundary)
+    {
+        errorStream.add((char *)"Attempt to read beyond IE boundary: \n");
+        return false;
+    }
+
+    data.pdnType = buffer.readBits(3);
+    // confirm that we are not reading beyond the IE boundary
+    if (buffer.getCurrentIndex() > ieBoundary)
+    {
+        errorStream.add((char *)"Attempt to read beyond IE boundary: pdnType\n");
+        return false;
+    }
+    if (!(data.pdnType<= 3))
+    {
+        errorStream.add((char *)"Data validation failure : pdnType\n");
+        return false; //TODO need to add validations
+    }
+
+    if (data.pdnType == 2 || data.pdnType == 3)
+    {
+
+        buffer.readUint8(data.ipv6PrefixLength);
+        if (buffer.getCurrentIndex() > ieBoundary)
+        {
+            errorStream.add((char *)"Attempt to read beyond IE boundary: ipv6PrefixLength\n");
+            return false;
+        }
+    }
+
+    Uint16 lengthLeft = length;
+
+    if (data.pdnType == 2 || data.pdnType == 3)
+    {
+        lengthLeft = ieBoundary - buffer.getCurrentIndex();
+        if (!(DataTypeCodecUtils::decodeIpAddressV6(buffer, data.ipV6Address, lengthLeft)))
+        {
+            errorStream.add((char *)"Failed to decode: ipV6Address\n");
+            return false;
+        }
+    }
+
+    if (data.pdnType == 1)
+    {
+        lengthLeft = ieBoundary - buffer.getCurrentIndex();
+        if (!(DataTypeCodecUtils::decodeIpAddressV4(buffer, data.ipV4Address, lengthLeft)))
+        {
+            errorStream.add((char *)"Failed to decode: ipV4Address\n");
+            return false;
+        }
+    }
+
+    // The IE is decoded now. The buffer index should be pointing to the 
+    // IE Boundary. If not, we have some more data left for the IE which we don't know
+    // how to decode
+    if (ieBoundary == buffer.getCurrentIndex())
+    {
+        return true;
+    }
+    else
+    {
+        errorStream.add((char *)"Unable to decode IE PaaIe\n");
+        return false;
+    }
+}
+void PaaIe::displayPaaIe_v(PaaIeData const &data, Debug &stream)
+{
+    stream.incrIndent();
+    stream.add((char *)"PaaIeData:");
+    stream.incrIndent();
+    stream.endOfLine();
+  
+    stream.add( (char *)"pdnType: "); 
+    stream.add((Uint8)data.pdnType);
+    stream.endOfLine();
+  
+    if (data.pdnType == 2 || data.pdnType == 3)
+    {
+        stream.add((char *)"ipv6PrefixLength: ");
+        stream.add(data.ipv6PrefixLength);
+        stream.endOfLine();
+    }
+  
+    if (data.pdnType == 2 || data.pdnType == 3)
+    {
+        stream.add((char *)"ipV6Address:");
+        stream.endOfLine();
+        DataTypeCodecUtils::displayIpAddressV6_v(data.ipV6Address, stream);
+    }
+  
+    if (data.pdnType == 1)
+    {
+        stream.add((char *)"ipV4Address:");
+        stream.endOfLine();
+        DataTypeCodecUtils::displayIpAddressV4_v(data.ipV4Address, stream);
+    }
+    stream.decrIndent();
+    stream.decrIndent();
+}