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

Change-Id: Ie55032217232214ac8544ca76ea34335205329e4
diff --git a/src/mme-app/msgHandlers/gtpMsgHandler.cpp b/src/mme-app/msgHandlers/gtpMsgHandler.cpp
new file mode 100644
index 0000000..3888803
--- /dev/null
+++ b/src/mme-app/msgHandlers/gtpMsgHandler.cpp
@@ -0,0 +1,167 @@
+/*
+ * Copyright (c) 2019, Infosys Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <msgHandlers/gtpMsgHandler.h>
+
+#include <contextManager/subsDataGroupManager.h>
+#include <event.h>
+#include <ipcTypes.h>
+#include <log.h>
+
+using namespace SM;
+using namespace mme;
+
+GtpMsgHandler::~GtpMsgHandler() {
+
+}
+
+GtpMsgHandler::GtpMsgHandler() {
+
+
+}
+
+GtpMsgHandler* GtpMsgHandler::Instance()
+{
+	static GtpMsgHandler msgHandler;
+	return &msgHandler;
+}
+
+void GtpMsgHandler::handleGtpMessage_v(cmn::utils::MsgBuffer* msgBuf)
+{
+	if (msgBuf == NULL)
+		return;
+
+	const gtp_incoming_msg_data_t* msgData_p = (gtp_incoming_msg_data_t*)(msgBuf->getDataPointer());
+
+	switch (msgData_p->msg_type)
+	{
+		case msg_type_t::create_session_response:
+			log_msg(LOG_DEBUG,"Create Session Response msg rxed\n");
+			handleCreateSessionResponseMsg_v(msgBuf, msgData_p->ue_idx);
+			break;
+
+		case msg_type_t::modify_bearer_response:
+			handleModifyBearerResponseMsg_v(msgBuf, msgData_p->ue_idx);
+			break;
+
+		case msg_type_t::delete_session_response:
+			handleDeleteSessionResponseMsg_v(msgBuf, msgData_p->ue_idx);
+			break;
+			
+		case msg_type_t::release_bearer_response:
+			handleReleaseBearerResponseMsg_v(msgBuf, msgData_p->ue_idx);
+			break;
+		
+		case msg_type_t::downlink_data_notification:
+			handleDdnMsg_v(msgBuf, msgData_p->ue_idx);
+			break;
+
+		default:
+			log_msg(LOG_INFO, "Unhandled Gtp Message %d \n", msgData_p->msg_type);
+			delete msgBuf;
+	}
+
+}
+
+void GtpMsgHandler::handleCreateSessionResponseMsg_v(const cmn::utils::MsgBuffer* msgData_p, uint32_t ueIdx)
+{
+	log_msg(LOG_INFO, "handleCreateSessionResponseMsg_v");
+
+	SM::ControlBlock* controlBlk_p = SubsDataGroupManager::Instance()->findControlBlock(ueIdx);
+	if(controlBlk_p == NULL)
+	{
+		log_msg(LOG_ERROR, "handleCreateSessionResponseMsg_v: "
+							"Failed to find UE context using idx %d\n",
+							ueIdx);
+		return;
+	}
+
+	// Fire CS resp from SGW event, insert cb to procedure queue
+	SM::Event evt(Event_e::CS_RESP_FROM_SGW, (void *)msgData_p);
+	controlBlk_p->addEventToProcQ(evt);
+}
+
+void GtpMsgHandler::handleModifyBearerResponseMsg_v(const cmn::utils::MsgBuffer* msgData_p, uint32_t ueIdx)
+{
+	log_msg(LOG_INFO, "handleModifyBearerResponseMsg_v");
+
+	SM::ControlBlock* controlBlk_p = SubsDataGroupManager::Instance()->findControlBlock(ueIdx);
+	if(controlBlk_p == NULL)
+	{
+		log_msg(LOG_ERROR, "handleModifyBearerResponseMsg_v: "
+							"Failed to find UE context using idx %d\n",
+							ueIdx);
+		return;
+	}
+
+	// Fire MB rep from SGW event, insert cb to procedure queue
+	SM::Event evt(Event_e::MB_RESP_FROM_SGW, (void *)msgData_p);
+	controlBlk_p->addEventToProcQ(evt);
+}
+
+void GtpMsgHandler::handleDeleteSessionResponseMsg_v(const cmn::utils::MsgBuffer* msgData_p, uint32_t ueIdx)
+{
+	log_msg(LOG_INFO, "handleDeleteSessionResponseMsg_v");
+	
+	SM::ControlBlock* controlBlk_p = SubsDataGroupManager::Instance()->findControlBlock(ueIdx);
+	if(controlBlk_p == NULL)
+	{
+		log_msg(LOG_ERROR, "handleDeleteSessionResponse_v: "
+							"Failed to find UE context using idx %d\n",
+							ueIdx);
+		return;
+	}
+
+	SM::Event evt(Event_e::DEL_SESSION_RESP_FROM_SGW, (void *)msgData_p);
+	controlBlk_p->addEventToProcQ(evt);
+}
+
+void GtpMsgHandler::handleReleaseBearerResponseMsg_v(const cmn::utils::MsgBuffer* msgData_p, uint32_t ueIdx)
+{
+	log_msg(LOG_INFO, "handleReleaseBearerResponseMsg_v");
+
+	SM::ControlBlock* controlBlk_p = SubsDataGroupManager::Instance()->findControlBlock(ueIdx);
+	if(controlBlk_p == NULL)
+	{
+		log_msg(LOG_ERROR, "handleReleaseBearerResponse_v: "
+							"Failed to find UE context using idx %d\n",
+							ueIdx);
+		return;
+	}
+	
+	// Fire rel bearer response from sgw event, insert cb to procedure queue
+	SM::Event evt(Event_e::REL_AB_RESP_FROM_SGW, (void *)msgData_p);
+	controlBlk_p->addEventToProcQ(evt);
+}
+
+void GtpMsgHandler::handleDdnMsg_v(const cmn::utils::MsgBuffer* msgData_p, uint32_t ueIdx)
+{
+	log_msg(LOG_INFO,"Inside handle DDN\n");
+
+	SM::ControlBlock* controlBlk_p = SubsDataGroupManager::Instance()->findControlBlock(ueIdx);
+	if(controlBlk_p == NULL)
+	{
+		log_msg(LOG_ERROR, "handleReleaseBearerResponse_v: "
+							"Failed to find UE context using idx %d\n",
+							ueIdx);
+		return;
+	}
+
+	// Fire ddn from sgw event, insert cb to procedure queue
+	SM::Event evt(Event_e::DDN_FROM_SGW, (void *)msgData_p);
+	controlBlk_p->addEventToProcQ(evt);
+}
+