X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?a=blobdiff_plain;f=pkg%2Fcontrol%2Fcontrol.go;h=34dd6a0c710a1199d28f805b8b7693cdf2c47e94;hb=f1d0eb6a82e11f14f60e3636d526299ced0173ea;hp=d213c65e1c1179a8261bb4abf43f924e4f9c7cf3;hpb=e6e9432561cb86080cd6a6db0d80622337da1bd7;p=ric-plt%2Fsubmgr.git

diff --git a/pkg/control/control.go b/pkg/control/control.go
index d213c65..34dd6a0 100644
--- a/pkg/control/control.go
+++ b/pkg/control/control.go
@@ -19,77 +19,595 @@
 
 package control
 
-/*
-#include <rmr/RIC_message_types.h>
-
-#cgo CFLAGS: -I../
-#cgo LDFLAGS: -lrmr_nng -lnng
-*/
 import "C"
 
-
 import (
-  "gerrit.o-ran-sc.org/r/ric-plt/xapp-frame/pkg/xapp"
-  "errors"
-  "strconv"
+	"errors"
+	rtmgrclient "gerrit.o-ran-sc.org/r/ric-plt/submgr/pkg/rtmgr_client"
+	rtmgrhandle "gerrit.o-ran-sc.org/r/ric-plt/submgr/pkg/rtmgr_client/handle"
+	"gerrit.o-ran-sc.org/r/ric-plt/xapp-frame/pkg/xapp"
+	httptransport "github.com/go-openapi/runtime/client"
+	"github.com/go-openapi/strfmt"
+	"github.com/spf13/viper"
+	"math/rand"
+	"time"
+	"sync"	
 )
 
+var subReqTime time.Duration = 5 * time.Second
+var SubDelReqTime time.Duration = 5 * time.Second
+
 type Control struct {
-  e2ap *E2ap
-  registry *Registry
+	e2ap        *E2ap
+	registry    *Registry
+	rtmgrClient *RtmgrClient
+	tracker     *Tracker
+	timerMap	*TimerMap
+	rmrSendMutex *sync.Mutex	
+}
+
+type RMRMeid struct {
+	PlmnID string
+	EnbID  string
+	RanName string
+}
+
+var seedSN uint16
+
+const (
+	CREATE Action = 0
+	MERGE  Action = 1
+	NONE   Action = 2
+	DELETE Action = 3
+)
+
+func init() {
+	xapp.Logger.Info("SUBMGR /ric-plt-submgr:r3-test-v4")
+	viper.AutomaticEnv()
+	viper.SetEnvPrefix("submgr")
+	viper.AllowEmptyEnv(true)
+	seedSN = uint16(viper.GetInt("seed_sn"))
+	if seedSN == 0 {
+		rand.Seed(time.Now().UnixNano())
+		seedSN = uint16(rand.Intn(65535))
+	}
+	if seedSN > 65535 {
+		seedSN = 0
+	}
+	xapp.Logger.Info("SUBMGR: Initial Sequence Number: %v", seedSN)
 }
 
 func NewControl() Control {
-  return Control{new(E2ap),new(Registry)}
+	registry := new(Registry)
+	registry.Initialize(seedSN)
+
+	tracker := new(Tracker)
+	tracker.Init()
+
+	timerMap := new(TimerMap)
+	timerMap.Init()
+
+	rmrSendMutex := &sync.Mutex{}
+
+	transport := httptransport.New(viper.GetString("rtmgr.HostAddr")+":"+viper.GetString("rtmgr.port"), viper.GetString("rtmgr.baseUrl"), []string{"http"})
+	client := rtmgrclient.New(transport, strfmt.Default)
+	handle := rtmgrhandle.NewProvideXappSubscriptionHandleParamsWithTimeout(10 * time.Second)
+	deleteHandle := rtmgrhandle.NewDeleteXappSubscriptionHandleParamsWithTimeout(10 * time.Second)
+	rtmgrClient := RtmgrClient{client, handle, deleteHandle}
+
+	return Control{new(E2ap), registry, &rtmgrClient, tracker, timerMap, rmrSendMutex}
 }
 
 func (c *Control) Run() {
-  xapp.Run(c)
-}
-
-func (c *Control) Consume(mtype, sub_id int, len int, payload []byte) (err error) {
-  switch mtype {
-  case C.RIC_SUB_REQ:
-    err = c.handleSubscriptionRequest(&RmrDatagram{mtype, sub_id, payload})
-  case C.RIC_SUB_RESP:
-    err = c.handleSubscriptionResponse(&RmrDatagram{mtype, sub_id, payload})
-  default:
-    err = errors.New("Message Type "+strconv.Itoa(mtype)+" discarded")
-  }
-  return
-}
-
-func (c *Control) rmrSend(datagram *RmrDatagram) (err error) {
-  if !xapp.Rmr.Send(datagram.MessageType, datagram.SubscriptionId, len(datagram.Payload), datagram.Payload) {
-    err = errors.New("rmr.Send() failed")
-  }
-  return
-}
-
-func (c *Control) handleSubscriptionRequest(datagram *RmrDatagram) ( err error) {
-  /* TODO: removed to being able to integrate with UEMGR
-  content, err := c.e2ap.GetPayloadContent(datagram.Payload)
-  */
-  xapp.Logger.Info("Subscription Request Message received with ID: %v", datagram.SubscriptionId)
-  new_sub_id := c.registry.GetSubscriptionId()
-  /* TODO: removed to being able to integrate with UEMGR
-  payload, err := c.e2ap.SetSubscriptionSequenceNumber(datagram.Payload, new_sub_id)
-  if err != nil {
-    xapp.Logger.Error("Unable to set Subscription Sequence Number in Payload due to: "+ err.Error())
-    return
-  }
-  */
-  xapp.Logger.Info("New Subscription Registered, forwarding to E2T")
-  c.rmrSend(&RmrDatagram{C.RIC_SUB_REQ , new_sub_id, datagram.Payload})
-  return
-}
-
-func (c *Control) handleSubscriptionResponse(datagram *RmrDatagram) ( err error) {
-  /* TODO: removed to being able to integrate with UEMGR
-  content, err := c.e2ap.GetPayloadContent(datagram.Payload)
-  */
-  xapp.Logger.Info("Subscription Response Message received with ID: %v", datagram.SubscriptionId)
-  xapp.Logger.Info("Subscription Response Registered, forwarding to Requestor")
-  c.rmrSend(&RmrDatagram{C.RIC_SUB_RESP , datagram.SubscriptionId, datagram.Payload})
-  return
-}
\ No newline at end of file
+	xapp.Run(c)
+}
+
+func (c *Control) rmrSend(params *xapp.RMRParams) (err error) {
+	status := false
+	i := 1
+	for ; i <= 10 && status == false; i++ { 
+		c.rmrSendMutex.Lock()
+		status = xapp.Rmr.Send(params, false)
+		c.rmrSendMutex.Unlock()
+		if status == false {
+			xapp.Logger.Info("rmr.Send() failed. Retry count %v, Mtype: %v, SubId: %v, Xid %s",i, params.Mtype, params.SubId, params.Xid)
+			time.Sleep(500 * time.Millisecond)
+		}
+	}
+	if status == false {
+		err = errors.New("rmr.Send() failed")
+		xapp.Rmr.Free(params.Mbuf)
+	}
+	return
+}
+
+func (c *Control) rmrReplyToSender(params *xapp.RMRParams) (err error) {
+	c.rmrSend(params)
+	return
+}
+
+func (c *Control) Consume(msg *xapp.RMRParams) (err error) {
+	switch msg.Mtype {
+	case xapp.RICMessageTypes["RIC_SUB_REQ"]:
+		go c.handleSubscriptionRequest(msg)
+	case xapp.RICMessageTypes["RIC_SUB_RESP"]:
+		go c.handleSubscriptionResponse(msg)
+	case xapp.RICMessageTypes["RIC_SUB_FAILURE"]:
+		go c.handleSubscriptionFailure(msg)
+	case xapp.RICMessageTypes["RIC_SUB_DEL_REQ"]:
+		go c.handleSubscriptionDeleteRequest(msg)
+	case xapp.RICMessageTypes["RIC_SUB_DEL_RESP"]:
+		go c.handleSubscriptionDeleteResponse(msg)
+	case xapp.RICMessageTypes["RIC_SUB_DEL_FAILURE"]:
+		go c.handleSubscriptionDeleteFailure(msg)
+	default:
+		xapp.Logger.Info("Unknown Message Type '%d', discarding", msg.Mtype)
+	}
+	return nil
+}
+
+func (c *Control) handleSubscriptionRequest(params *xapp.RMRParams) {
+	xapp.Logger.Info("SubReq received from Src: %s, Mtype: %v, SubId: %v, Xid: %s, Meid: %v",params.Src, params.Mtype, params.SubId, params.Xid, params.Meid)
+	xapp.Rmr.Free(params.Mbuf)
+	params.Mbuf = nil
+
+	/* Reserve a sequence number and set it in the payload */
+	newSubId, isIdValid := c.registry.ReserveSequenceNumber()
+	if isIdValid != true {
+		xapp.Logger.Error("SubReq: Failed to reserve sequence number. Dropping this msg. SubId: %v, Xid: %s",params.SubId, params.Xid)
+		return 
+	}
+
+	err := c.e2ap.SetSubscriptionRequestSequenceNumber(params.Payload, newSubId)
+	if err != nil {
+		xapp.Logger.Error("SubReq: Unable to set Sequence Number in Payload. Dropping this msg. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+		return
+	}
+
+	srcAddr, srcPort, err := c.rtmgrClient.SplitSource(params.Src)
+	if err != nil {
+		xapp.Logger.Error("SubReq: Failed to update routing-manager. Dropping this msg. Err: %s, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+		return
+	}
+
+	/* Create transatcion records for every subscription request */
+	xactKey := TransactionKey{newSubId, CREATE}
+	xactValue := Transaction{*srcAddr, *srcPort, params}
+	err = c.tracker.TrackTransaction(xactKey, xactValue)
+	if err != nil {
+		xapp.Logger.Error("SubReq: Failed to create transaction record. Dropping this msg. Err: %v SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+		return
+	}
+
+	/* Update routing manager about the new subscription*/
+	subRouteAction := SubRouteInfo{CREATE, *srcAddr, *srcPort, newSubId}
+	xapp.Logger.Info("SubReq: Starting routing manager update. SubId: %v, Xid: %s", params.SubId, params.Xid)
+	err = c.rtmgrClient.SubscriptionRequestUpdate(subRouteAction)
+	if err != nil {
+		xapp.Logger.Error("SubReq: Failed to update routing manager. Dropping this SubReq msg. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+		return
+	}
+
+	// Setting new subscription ID in the RMR header
+	params.SubId = int(newSubId)
+	xapp.Logger.Info("Forwarding SubReq to E2T: Mtype: %v, SubId: %v, Xid %s, Meid %v",params.Mtype, params.SubId, params.Xid, params.Meid)
+	err = c.rmrSend(params)
+	if err != nil {
+		xapp.Logger.Error("SubReq: Failed to send request to E2T %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+	} else {
+		c.timerMap.StartTimer("RIC_SUB_REQ", int(newSubId), subReqTime, c.handleSubscriptionRequestTimer)
+	}
+	xapp.Logger.Debug("SubReq: Debugging transaction table = %v", c.tracker.transactionTable)
+	return
+}
+
+func (c *Control) handleSubscriptionResponse(params *xapp.RMRParams) {
+	xapp.Logger.Info("SubResp received from Src: %s, Mtype: %v, SubId: %v, Meid: %v",params.Src, params.Mtype, params.SubId, params.Meid)
+	xapp.Rmr.Free(params.Mbuf)
+	params.Mbuf = nil
+
+	payloadSeqNum, err := c.e2ap.GetSubscriptionResponseSequenceNumber(params.Payload)
+	if err != nil {
+		xapp.Logger.Error("SubResp: Unable to get Sequence Number from Payload. Dropping this msg. Err: %v, SubId: %v", err, params.SubId)
+		return
+	}
+	xapp.Logger.Info("SubResp: Received payloadSeqNum: %v",payloadSeqNum)
+
+	if !c.registry.IsValidSequenceNumber(payloadSeqNum) {
+		xapp.Logger.Error("SubResp: Unknown payloadSeqNum. Dropping this msg. PayloadSeqNum: %v, SubId: %v", payloadSeqNum, params.SubId)		
+		return
+	}
+
+	c.timerMap.StopTimer("RIC_SUB_REQ", int(payloadSeqNum))
+
+	c.registry.setSubscriptionToConfirmed(payloadSeqNum)
+	var transaction Transaction
+	transaction, err = c.tracker.RetriveTransaction(payloadSeqNum, CREATE)
+	if err != nil {
+		xapp.Logger.Error("SubResp: Failed to retrive transaction record. Dropping this msg. Err: %V, SubId: %v", err, params.SubId)
+		return
+	}
+	xapp.Logger.Info("SubResp: SubId: %v, from address: %v:%v. Retrieved old subId", int(payloadSeqNum), transaction.XappInstanceAddress, transaction.XappPort)
+
+    params.SubId = int(payloadSeqNum)
+    params.Xid = transaction.OrigParams.Xid
+	
+	xapp.Logger.Info("SubResp: Forwarding Subscription Response to xApp Mtype: %v, SubId: %v, Meid: %v",params.Mtype, params.SubId, params.Meid)
+	err = c.rmrReplyToSender(params)
+	if err != nil {
+		xapp.Logger.Error("SubResp: Failed to send response to xApp. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+	}
+
+	xapp.Logger.Info("SubResp: SubId: %v, from address: %v:%v. Deleting transaction record", int(payloadSeqNum), transaction.XappInstanceAddress, transaction.XappPort)
+	transaction, err = c.tracker.completeTransaction(payloadSeqNum, CREATE)
+	if err != nil {
+		xapp.Logger.Error("SubResp: Failed to delete transaction record. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+		return
+	}
+	return
+}
+
+func (c *Control) handleSubscriptionFailure(params *xapp.RMRParams) {
+	xapp.Logger.Info("SubFail received from Src: %s, Mtype: %v, SubId: %v, Meid: %v",params.Src, params.Mtype, params.SubId, params.Meid)
+	xapp.Rmr.Free(params.Mbuf)
+	params.Mbuf = nil
+
+	payloadSeqNum, err := c.e2ap.GetSubscriptionFailureSequenceNumber(params.Payload)
+	if err != nil {
+		xapp.Logger.Error("SubFail: Unable to get Sequence Number from Payload. Dropping this msg. Err: %v, SubId: %v", err, params.SubId)
+		return
+	}
+	xapp.Logger.Info("SubFail: Received payloadSeqNum: %v", payloadSeqNum)
+
+	c.timerMap.StopTimer("RIC_SUB_REQ", int(payloadSeqNum))
+
+	var transaction Transaction
+	transaction, err = c.tracker.RetriveTransaction(payloadSeqNum, CREATE)
+	if  err != nil {
+		xapp.Logger.Error("SubFail: Failed to retrive transaction record. Dropping this msg. Err: %v, SubId: %v: %s", err, params.SubId)
+		return
+	}
+	xapp.Logger.Info("SubFail: SubId: %v, from address: %v:%v. Forwarding response to xApp", int(payloadSeqNum), transaction.XappInstanceAddress, transaction.XappPort)
+
+	params.SubId = int(payloadSeqNum)
+	params.Xid = transaction.OrigParams.Xid
+
+	xapp.Logger.Info("Forwarding SubFail to xApp: Mtype: %v, SubId: %v, Xid: %v, Meid: %v",params.Mtype, params.SubId, params.Xid, params.Meid)
+	err = c.rmrReplyToSender(params)
+	if err != nil {
+		xapp.Logger.Error("Failed to send response to xApp. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+	}
+
+	time.Sleep(3 * time.Second)
+
+	xapp.Logger.Info("SubFail: Starting routing manager update. SubId: %v, Xid: %s", params.SubId, params.Xid)
+	subRouteAction := SubRouteInfo{CREATE, transaction.XappInstanceAddress, transaction.XappPort, payloadSeqNum}
+	err = c.rtmgrClient.SubscriptionRequestUpdate(subRouteAction)
+	if err != nil {
+		xapp.Logger.Error("SubFail: Failed to update routing manager. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+	}
+
+	xapp.Logger.Info("SubFail: Deleting transaction record. SubId: %v, Xid: %s", params.SubId, params.Xid)
+	if c.registry.releaseSequenceNumber(payloadSeqNum) {
+		transaction, err = c.tracker.completeTransaction(payloadSeqNum, CREATE)
+		if err != nil {
+			xapp.Logger.Error("SubFail: Failed to delete transaction record. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+			return
+		}
+	} else {
+		xapp.Logger.Error("SubFail: Failed to release sequency number. SubId: %v, Xid: %s", params.SubId, params.Xid)
+		return
+	}
+	return
+}
+
+func (c *Control) handleSubscriptionRequestTimer(strId string, nbrId int) {
+	newSubId := uint16(nbrId)
+	xapp.Logger.Info("SubReq timer expired. newSubId: %v", newSubId)
+//	var causeContent uint8 = 1  // just some random cause. To be checked later. Should be no respose or something
+//	var causeVal uint8 = 1  // just some random val. To be checked later. Should be no respose or something
+//	c.sendSubscriptionFailure(newSubId, causeContent, causeVal)
+}
+
+/*
+func (c *Control) sendSubscriptionFailure(subId uint16, causeContent uint8, causeVal uint8) {
+
+	transaction, err := c.tracker.completeTransaction(subId, CREATE)
+	if err != nil {
+		xapp.Logger.Error("SendSubFail: Failed to delete transaction record. Err:%v. SubId: %v", err, subId)
+		return
+	}
+	xapp.Logger.Info("SendSubFail: SubId: %v, Xid %v, Meid: %v", subId, transaction.OrigParams.Xid, transaction.OrigParams.Meid)
+
+	var params xapp.RMRParams
+	params.Mtype = 12012 //xapp.RICMessageTypes["RIC_SUB_FAILURE"]
+	params.SubId = int(subId)
+	params.Meid = transaction.OrigParams.Meid
+	params.Xid = transaction.OrigParams.Xid
+	
+//	newPayload, packErr := c.e2ap.PackSubscriptionFailure(transaction.OrigParams.Payload, subId, causeContent, causeVal)
+//	if packErr != nil {
+//		xapp.Logger.Error("SendSubFail: PackSubscriptionFailure() due to %v", packErr)
+//		return
+//	}
+	
+	newPayload := []byte("40CA4018000003EA7E00050000010016EA6300020021EA74000200C0")  // Temporary solution
+
+	params.PayloadLen = len(newPayload)
+	params.Payload = newPayload
+
+	xapp.Logger.Info("SendSubFail: Forwarding failure to xApp: Mtype: %v, SubId: %v, Xid: %s, Meid: %v",params.Mtype, params.SubId, params.Xid, params.Meid)
+	err = c.rmrReplyToSender(&params)
+	if err != nil {
+		xapp.Logger.Error("SendSubFail: Failed to send response to xApp. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+	}
+
+	time.Sleep(3 * time.Second)
+
+	xapp.Logger.Info("SendSubFail: SubId: %v, from address: %v:%v. Deleting transaction record", int(subId), transaction.XappInstanceAddress, transaction.XappPort)
+
+	xapp.Logger.Info("SubReqTimer: Starting routing manager update. SubId: %v, Xid: %s", params.SubId, params.Xid)
+	subRouteAction := SubRouteInfo{DELETE, transaction.XappInstanceAddress, transaction.XappPort, subId}
+	err = c.rtmgrClient.SubscriptionRequestUpdate(subRouteAction)
+	if err != nil {
+		xapp.Logger.Error("SendSubFail: Failed to update routing manager %v. SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+		return
+	}
+
+	xapp.Logger.Info("SendSubFail: Deleting transaction record. SubId: %v, Xid: %s", params.SubId, params.Xid)
+	if c.registry.releaseSequenceNumber(subId) {
+		transaction, err = c.tracker.completeTransaction(subId, CREATE)
+		if err != nil {
+			xapp.Logger.Error("SendSubFail: Failed to delete transaction record. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+			return
+		}
+	} else {
+		xapp.Logger.Error("SendSubFail: Failed to release sequency number. SubId: %v, Xid: %s", params.SubId, params.Xid)
+	}
+	return
+}
+*/
+
+func (act Action) String() string {
+	actions := [...]string{
+		"CREATE",
+		"MERGE",
+		"NONE",
+		"DELETE",
+	}
+
+	if act < CREATE || act > DELETE {
+		return "Unknown"
+	}
+	return actions[act]
+}
+
+func (act Action) valid() bool {
+	switch act {
+	case CREATE, MERGE, DELETE:
+		return true
+	default:
+		return false
+	}
+}
+
+func (c *Control) handleSubscriptionDeleteRequest(params *xapp.RMRParams) {
+	xapp.Logger.Info("SubDelReq received from Src: %s, Mtype: %v, SubId: %v, Xid: %s, Meid: %v",params.Src, params.Mtype, params.SubId, params.Xid, params.Meid)
+	xapp.Rmr.Free(params.Mbuf)
+	params.Mbuf = nil
+
+	payloadSeqNum, err := c.e2ap.GetSubscriptionDeleteRequestSequenceNumber(params.Payload)
+	if err != nil {
+		xapp.Logger.Error("SubDelReq: Unable to get Sequence Number from Payload. Dropping this msg. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+		return
+	}
+	xapp.Logger.Info("SubDelReq: Received payloadSeqNum: %v", payloadSeqNum)
+
+	if c.registry.IsValidSequenceNumber(payloadSeqNum) {
+		c.registry.deleteSubscription(payloadSeqNum)
+		err = c.trackDeleteTransaction(params, payloadSeqNum)
+		if err != nil {
+			xapp.Logger.Error("SubDelReq: Failed to create transaction record. Dropping this msg. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+			return
+		}
+	} else {
+		xapp.Logger.Error("SubDelReq: Not valid sequence number. Dropping this msg. SubId: %v, Xid: %s", params.SubId, params.Xid)
+		return
+	}
+	
+	xapp.Logger.Info("SubDelReq: Forwarding Request to E2T. Mtype: %v, SubId: %v, Xid: %s, Meid: %v",params.Mtype, params.SubId, params.Xid, params.Meid)
+	c.rmrSend(params)
+	if err != nil {
+		xapp.Logger.Error("SubDelReq: Failed to send request to E2T. Err %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+	} else {
+		c.timerMap.StartTimer("RIC_SUB_DEL_REQ", int(payloadSeqNum), subReqTime, c.handleSubscriptionDeleteRequestTimer)
+	}
+	return
+}
+
+func (c *Control) trackDeleteTransaction(params *xapp.RMRParams, payloadSeqNum uint16) (err error) {
+	srcAddr, srcPort, err := c.rtmgrClient.SplitSource(params.Src)
+	if err != nil {
+		xapp.Logger.Error("SubDelReq: Failed to update routing-manager. Err: %s, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+	}
+	xactKey := TransactionKey{payloadSeqNum, DELETE}
+	xactValue := Transaction{*srcAddr, *srcPort, params}
+	err = c.tracker.TrackTransaction(xactKey, xactValue)
+	return
+}
+
+func (c *Control) handleSubscriptionDeleteResponse(params *xapp.RMRParams) (err error) {
+	xapp.Logger.Info("SubDelResp received from Src: %s, Mtype: %v, SubId: %v, Meid: %v",params.Src, params.Mtype, params.SubId, params.Meid)
+	xapp.Rmr.Free(params.Mbuf)
+	params.Mbuf = nil
+
+	payloadSeqNum, err := c.e2ap.GetSubscriptionDeleteResponseSequenceNumber(params.Payload)
+	if err != nil {
+		xapp.Logger.Error("SubDelResp: Unable to get Sequence Number from Payload. Dropping this msg. Err: %, SubId: %v", err, params.SubId)
+		return
+	}
+	xapp.Logger.Info("SubDelResp: Received payloadSeqNum: %v", payloadSeqNum)
+
+	c.timerMap.StopTimer("RIC_SUB_DEL_REQ", int(payloadSeqNum))
+
+	var transaction Transaction
+	transaction, err = c.tracker.RetriveTransaction(payloadSeqNum, DELETE)
+	if  err != nil {
+		xapp.Logger.Error("SubDelResp: Failed to retrive transaction record. Dropping this msg. Err: %v, SubId: %v", err, params.SubId)
+		return
+	}
+	xapp.Logger.Info("SubDelResp: SubId: %v, from address: %v:%v. Forwarding response to xApp", int(payloadSeqNum), transaction.XappInstanceAddress, transaction.XappPort)
+
+    params.SubId = int(payloadSeqNum)
+    params.Xid = transaction.OrigParams.Xid
+	xapp.Logger.Info("Forwarding SubDelResp to xApp: Mtype: %v, SubId: %v, Xid: %v, Meid: %v",params.Mtype, params.SubId, params.Xid, params.Meid)
+	err = c.rmrReplyToSender(params)
+	if err != nil {
+		xapp.Logger.Error("SubDelResp: Failed to send response to xApp. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+//		return
+	}
+
+	time.Sleep(3 * time.Second)
+
+	xapp.Logger.Info("SubDelResp: Starting routing manager update. SubId: %v, Xid: %s", params.SubId, params.Xid)
+	subRouteAction := SubRouteInfo{DELETE, transaction.XappInstanceAddress, transaction.XappPort, payloadSeqNum}
+	err = c.rtmgrClient.SubscriptionRequestUpdate(subRouteAction)
+	if err != nil {
+		xapp.Logger.Error("SubDelResp: Failed to update routing manager. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+		return
+	}
+
+	xapp.Logger.Info("SubDelResp: Deleting transaction record. SubId: %v, Xid: %s", params.SubId, params.Xid)
+	if c.registry.releaseSequenceNumber(payloadSeqNum) {
+		transaction, err = c.tracker.completeTransaction(payloadSeqNum, DELETE)
+		if err != nil {
+			xapp.Logger.Error("SubDelResp: Failed to delete transaction record. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+			return
+		}
+	} else {
+		xapp.Logger.Error("SubDelResp: Failed to release sequency number. SubId: %v, Xid: %s", params.SubId, params.Xid)
+		return
+	}
+	return
+}
+
+func (c *Control) handleSubscriptionDeleteFailure(params *xapp.RMRParams) {
+	xapp.Logger.Info("SubDelFail received from Src: %s, Mtype: %v, SubId: %v, Meid: %v",params.Src, params.Mtype, params.SubId, params.Meid)
+	xapp.Rmr.Free(params.Mbuf)
+	params.Mbuf = nil
+
+	payloadSeqNum, err := c.e2ap.GetSubscriptionDeleteFailureSequenceNumber(params.Payload)
+	if err != nil {
+		xapp.Logger.Error("SubDelFail: Unable to get Sequence Number from Payload. Dropping this msg. Err: %, SubId: %v", err, params.SubId)
+		return
+	}
+	xapp.Logger.Info("SubDelFail: Received payloadSeqNum: %v", payloadSeqNum)
+
+	c.timerMap.StopTimer("RIC_SUB_DEL_REQ", int(payloadSeqNum))
+
+	var transaction Transaction
+	transaction, err = c.tracker.RetriveTransaction(payloadSeqNum, DELETE)
+	if  err != nil {
+		xapp.Logger.Error("SubDelFail: Failed to retrive transaction record. Dropping msg. Err %v, SubId: %v", err, params.SubId)
+		return
+	}
+	xapp.Logger.Info("SubDelFail: SubId: %v, from address: %v:%v. Forwarding response to xApp", int(payloadSeqNum), transaction.XappInstanceAddress, transaction.XappPort)
+
+    params.SubId = int(payloadSeqNum)
+    params.Xid = transaction.OrigParams.Xid
+	xapp.Logger.Info("Forwarding SubDelFail to xApp: Mtype: %v, SubId: %v, Xid: %v, Meid: %v",params.Mtype, params.SubId, params.Xid, params.Meid)
+	err = c.rmrReplyToSender(params)
+	if err != nil {
+		xapp.Logger.Error("Failed to send SubDelFail to xApp. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+//		return
+	}
+
+	time.Sleep(3 * time.Second)
+
+	xapp.Logger.Info("SubDelFail: Starting routing manager update. SubId: %v, Xid: %s", params.SubId, params.Xid)
+	subRouteAction := SubRouteInfo{DELETE, transaction.XappInstanceAddress, transaction.XappPort, payloadSeqNum}
+	c.rtmgrClient.SubscriptionRequestUpdate(subRouteAction)
+	if err != nil {
+		xapp.Logger.Error("SubDelFail: Failed to update routing manager. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+		return
+	}
+
+	xapp.Logger.Info("SubDelFail: Deleting transaction record. SubId: %v, Xid: %s", params.SubId, params.Xid)
+	if c.registry.releaseSequenceNumber(payloadSeqNum) {
+		transaction, err = c.tracker.completeTransaction(payloadSeqNum, DELETE)
+		if err != nil {
+			xapp.Logger.Error("SubDelFail: Failed to delete transaction record. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+			return
+		}
+	} else {
+		xapp.Logger.Error("SubDelFail: Failed to release sequency number. SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+		return
+	}
+	return
+}
+
+func (c *Control) handleSubscriptionDeleteRequestTimer(strId string, nbrId int) {
+	newSubId := uint16(nbrId)
+	xapp.Logger.Info("SubDelReq timer expired. newSubId: %v", newSubId)
+//	var causeContent uint8 = 1  // just some random cause. To be checked later. Should be no respose or something
+//	var causeVal uint8 = 1  // just some random val. To be checked later. Should be no respose or something
+//	c.sendSubscriptionDeleteFailure(newSubId, causeContent, causeVal)
+}
+
+/*
+func (c *Control) sendSubscriptionDeleteFailure(subId uint16, causeContent uint8, causeVal uint8) {
+	transaction, err := c.tracker.completeTransaction(subId, DELETE)
+	if err != nil {
+		xapp.Logger.Error("SendSubDelFail: Failed to delete transaction record. Err: %v, newSubId: %v", err, subId)
+		return
+	}
+	xapp.Logger.Info("SendSubDelFail: SubId: %v, Xid %v, Meid: %v",subId, transaction.OrigParams.Xid, transaction.OrigParams.Meid)
+
+	var params xapp.RMRParams
+	params.Mtype = 12022 //xapp.RICMessageTypes["RIC_SUB_DEL_FAILURE"]
+	params.SubId = int(subId)
+	params.Meid = transaction.OrigParams.Meid
+	params.Xid = transaction.OrigParams.Xid
+	
+//	newPayload, packErr := c.e2ap.PackSubscriptionDeleteFailure(transaction.OrigParams.Payload, subId, causeContent, causeVal)
+//	if packErr != nil {
+//		xapp.Logger.Error("SendSubDelFail: PackSubscriptionDeleteFailure(). Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid))
+//		return
+//	}
+
+	newPayload := []byte("40CA4018000003EA7E00050000010016EA6300020021EA74000200C0")  // Temporary solution
+
+	params.PayloadLen = len(newPayload)
+	params.Payload = newPayload
+
+	xapp.Logger.Info("SendSubDelFail: Forwarding failure to xApp: Mtype: %v, SubId: %v, Xid: %s, Meid: %v",params.Mtype, params.SubId, params.Xid, params.Meid)
+	err = c.rmrReplyToSender(&params)
+	if err != nil {
+		xapp.Logger.Error("SendSubDelFail: Failed to send response to xApp: Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+	}
+	
+	time.Sleep(3 * time.Second)
+	
+	xapp.Logger.Info("SendSubDelFail: SubId: %v, from address: %v:%v. Deleting transaction record", int(subId), transaction.XappInstanceAddress, transaction.XappPort)
+
+	xapp.Logger.Info("SendSubDelFail: Starting routing manager update. SubId: %v, Xid: %s", params.SubId, params.Xid)
+	subRouteAction := SubRouteInfo{DELETE, transaction.XappInstanceAddress, transaction.XappPort, subId}
+	err = c.rtmgrClient.SubscriptionRequestUpdate(subRouteAction)
+	if err != nil {
+		xapp.Logger.Error("SendSubDelFail: Failed to update routing manager. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+		return
+	}
+
+	xapp.Logger.Info("SendSubDelFail: Deleting transaction record. SubId: %v, Xid: %s", params.SubId, params.Xid)
+	if c.registry.releaseSequenceNumber(subId) {
+		transaction, err = c.tracker.completeTransaction(subId, DELETE)
+		if err != nil {
+			xapp.Logger.Error("SendSubDelFail: Failed to delete transaction record. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+			return
+		}
+	} else {
+		xapp.Logger.Error("SendSubDelFail: Failed to release sequency number. SubId: %v, Xid: %s", params.SubId, params.Xid)
+	}
+	return
+}
+*/
\ No newline at end of file