+ go c.controlLoop()
+ xapp.Run(c)
+}
+
+func (c *Control) Consume(rp *xapp.RMRParams) (err error) {
+ c.rcChan <- rp
+ return
+}
+
+func (c *Control) rmrSend(params *xapp.RMRParams) (err error) {
+ status := false
+ i := 1
+ for ; i <= 10 && status == false; i++ {
+ rmrSendMutex.Lock()
+ status = xapp.Rmr.Send(params, false)
+ 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)
+ }
+
+ /*
+ if !xapp.Rmr.Send(params, 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) controlLoop() {
+ for {
+ msg := <-c.rcChan
+ 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)
+ default:
+ err := errors.New("Message Type " + strconv.Itoa(msg.Mtype) + " is discarded")
+ xapp.Logger.Error("Unknown message type: %v", err)
+ }
+ }
+}
+
+func (c *Control) handleSubscriptionRequest(params *xapp.RMRParams) (err error) {
+ xapp.Logger.Info("Subscription Request 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.Info("Further processing of this SubscriptionRequest stopped. SubId: %v, Xid: %s",params.SubId, params.Xid)
+ return
+ }
+
+ err = c.e2ap.SetSubscriptionRequestSequenceNumber(params.Payload, newSubId)
+ if err != nil {
+ err = errors.New("Unable to set Subscription Sequence Number in Payload due to: " + err.Error())
+ return
+ }
+
+ srcAddr, srcPort, err := c.rtmgrClient.SplitSource(params.Src)
+ if err != nil {
+ xapp.Logger.Error("Failed to update routing-manager about the subscription request with reason: %s", err)
+ 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("Failed to create a Subscription Request transaction record due to %v", err)
+ return
+ }
+
+ /* Update routing manager about the new subscription*/
+ subRouteAction := SubRouteInfo{CREATE, *srcAddr, *srcPort, newSubId}
+ xapp.Logger.Info("Starting routing manager update")
+ c.rtmgrClient.SubscriptionRequestUpdate(subRouteAction)
+
+ //time.Sleep(3 * time.Second)
+
+ // Setting new subscription ID in the RMR header
+ params.SubId = int(newSubId)
+ xapp.Logger.Info("Forwarding Subscription Request 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("Failed to send request to E2T %v. SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+ } /*else {
+ c.timerMap.StartTimer(newSubId, subReqTime, c.handleSubscriptionRequestTimer)
+ }*/
+ xapp.Logger.Debug("--- Debugging transaction table = %v", c.tracker.transactionTable)
+ return
+}
+
+func (c *Control) handleSubscriptionResponse(params *xapp.RMRParams) (err error) {
+ xapp.Logger.Info("Subscription Response 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 {
+ err = errors.New("Unable to get Subscription Sequence Number from Payload due to: " + err.Error())
+ return
+ }
+
+ xapp.Logger.Info("Received payloadSeqNum: %v",payloadSeqNum)
+ if !c.registry.IsValidSequenceNumber(payloadSeqNum) {
+ err = errors.New("Unknown Subscription ID: " + strconv.Itoa(int(payloadSeqNum)) + " in Subscritpion Response. Message discarded.")
+ return
+ }
+
+// c.timerMap.StopTimer(payloadSeqNum)
+
+ c.registry.setSubscriptionToConfirmed(payloadSeqNum)
+ var transaction Transaction
+ transaction, err = c.tracker.RetriveTransaction(payloadSeqNum, CREATE)
+ if err != nil {
+ xapp.Logger.Error("Failed to retrive transaction record. Err: %v", err)
+ xapp.Logger.Info("Further processing of this Subscription Response stopped. SubId: %v, Xid: %s",params.SubId, params.Xid)
+ return
+ }
+ xapp.Logger.Info("Subscription ID: %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("Forwarding Subscription Response to UEEC: 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("Failed to send response to requestor %v. SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+ }
+
+ xapp.Logger.Info("Subscription ID: %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("Failed to delete a Subscription Request transaction record due to %v", err)
+ return
+ }
+ return
+}
+
+func (c *Control) handleSubscriptionFailure(params *xapp.RMRParams) (err error) {
+ xapp.Logger.Info("Subscription Failure 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 {
+ err = errors.New("Unable to get Subscription Sequence Number from Payload due to: " + err.Error())
+ return
+ }
+ xapp.Logger.Info("Received payloadSeqNum: %v", payloadSeqNum)
+
+ // should here be IsValidSequenceNumber check?
+
+// c.timerMap.StopTimer(payloadSeqNum)
+
+ var transaction Transaction
+ transaction, err = c.tracker.RetriveTransaction(payloadSeqNum, CREATE)
+ if err != nil {
+ xapp.Logger.Error("Failed to retrive transaction record. Err %v", err)
+ xapp.Logger.Info("Further processing of this Subscription Failure stopped. SubId: %v, Xid: %s",params.SubId, params.Xid)
+ return
+ }
+ xapp.Logger.Info("Subscription ID: %v, from address: %v:%v. Forwarding response to requestor...", int(payloadSeqNum), transaction.XappInstanceAddress, transaction.XappPort)
+
+ params.SubId = int(payloadSeqNum)
+ params.Xid = transaction.OrigParams.Xid
+
+ xapp.Logger.Info("Forwarding Subscription Failure to UEEC: 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 requestor %v. SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+ }
+
+ time.Sleep(3 * time.Second)
+
+ xapp.Logger.Info("Starting routing manager update")
+ subRouteAction := SubRouteInfo{CREATE, transaction.XappInstanceAddress, transaction.XappPort, payloadSeqNum}
+ c.rtmgrClient.SubscriptionRequestUpdate(subRouteAction)
+
+ xapp.Logger.Info("Deleting trancaction record")
+ if c.registry.releaseSequenceNumber(payloadSeqNum) {
+ transaction, err = c.tracker.completeTransaction(payloadSeqNum, CREATE)
+ if err != nil {
+ xapp.Logger.Error("Failed to delete a Subscription Request transaction record due to %v", err)
+ return
+ }
+ }
+ return
+}
+
+func (c *Control) handleSubscriptionRequestTimer(subId uint16) {
+ xapp.Logger.Info("Subscription Request timer expired. SubId: %v",subId)
+/*
+ transaction, err := c.tracker.completeTransaction(subId, CREATE)
+ if err != nil {
+ xapp.Logger.Error("Failed to delete a Subscription Request transaction record due to %v", err)
+ return
+ }
+ xapp.Logger.Info("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
+ payload := []byte("40C9408098000003EA7E00050000010016EA6300020021EA6E00808180EA6F000400000000EA6F000400010040EA6F000400020080EA6F0004000300C0EA6F000400040100EA6F000400050140EA6F000400060180EA6F0004000701C0EA6F000400080200EA6F000400090240EA6F0004000A0280EA6F0004000B02C0EA6F0004000C0300EA6F0004000D0340EA6F0004000E0380EA6F0004000F03C0")
+ params.PayloadLen = len(payload)
+ params.Payload = payload
+
+ xapp.Logger.Info("Forwarding Subscription Failure to UEEC: Mtype: %v, SubId: %v, Xid: %s, Meid: %v",params.Mtype, params.SubId, params.Xid, params.Meid)
+ err = c.rmrReplyToSender(¶ms)
+ if err != nil {
+ xapp.Logger.Error("Failed to send response to requestor %v. SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+ }
+*/
+/*
+ time.Sleep(3 * time.Second)
+
+ xapp.Logger.Info("Subscription ID: %v, from address: %v:%v. Deleting transaction record", int(subId), transaction.XappInstanceAddress, transaction.XappPort)
+
+ xapp.Logger.Info("Starting routing manager update")
+ subRouteAction := SubRouteInfo{DELETE, transaction.XappInstanceAddress, transaction.XappPort, payloadSeqNum}
+ c.rtmgrClient.SubscriptionRequestUpdate(subRouteAction)
+
+ xapp.Logger.Info("Deleting trancaction record")
+ if c.registry.releaseSequenceNumber(payloadSeqNum) {
+ transaction, err = c.tracker.completeTransaction(payloadSeqNum, CREATE)
+ if err != nil {
+ xapp.Logger.Error("Failed to delete a Subscription Request transaction record due to %v", err)
+ return
+ }
+ }
+*/
+ return
+}
+
+func (act Action) String() string {
+ actions := [...]string{
+ "CREATE",
+ "MERGE",
+ "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) (err error) {
+ xapp.Logger.Info("Subscription Delete Request 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 {
+ err = errors.New("Unable to get Subscription Sequence Number from Payload due to: " + err.Error())
+ return
+ }
+ xapp.Logger.Info("Received payloadSeqNum: %v", payloadSeqNum)
+ if c.registry.IsValidSequenceNumber(payloadSeqNum) {
+ c.registry.deleteSubscription(payloadSeqNum)
+ trackErr := c.trackDeleteTransaction(params, payloadSeqNum)
+ if trackErr != nil {
+ xapp.Logger.Error("Failed to create a Subscription Delete Request transaction record due to %v", trackErr)
+ return trackErr
+ }
+ }
+
+ xapp.Logger.Info("Forwarding Delete Subscription 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("Failed to send request to E2T %v. SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+ } /*else {
+ c.timerMap.StartTimer(payloadSeqNum, SubDelReqTime, 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("Failed to update routing-manager about the subscription delete request with reason: %s", err)
+ }
+ 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("Subscription Delete Response 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 {
+ err = errors.New("Unable to get Subscription Sequence Number from Payload due to: " + err.Error())
+ return
+ }
+ xapp.Logger.Info("Received payloadSeqNum: %v", payloadSeqNum)
+
+ // should here be IsValidSequenceNumber check?
+// c.timerMap.StopTimer(payloadSeqNum)
+
+ var transaction Transaction
+ transaction, err = c.tracker.RetriveTransaction(payloadSeqNum, DELETE)
+ if err != nil {
+ xapp.Logger.Error("Failed to retrive transaction record. Err %v", err)
+ xapp.Logger.Info("Further processing of this Subscription Delete Response stopped. SubId: %v, Xid: %s",params.SubId, params.Xid)
+ return
+ }
+ xapp.Logger.Info("Subscription ID: %v, from address: %v:%v. Forwarding response to requestor...", int(payloadSeqNum), transaction.XappInstanceAddress, transaction.XappPort)
+
+ params.SubId = int(payloadSeqNum)
+ params.Xid = transaction.OrigParams.Xid
+ xapp.Logger.Info("Forwarding Subscription Delete Response to UEEC: 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 requestor %v. SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+// return
+ }
+
+ time.Sleep(3 * time.Second)
+
+ xapp.Logger.Info("Starting routing manager update")
+ subRouteAction := SubRouteInfo{DELETE, transaction.XappInstanceAddress, transaction.XappPort, payloadSeqNum}
+ c.rtmgrClient.SubscriptionRequestUpdate(subRouteAction)
+
+ xapp.Logger.Info("Deleting trancaction record")
+ if c.registry.releaseSequenceNumber(payloadSeqNum) {
+ transaction, err = c.tracker.completeTransaction(payloadSeqNum, DELETE)
+ if err != nil {
+ xapp.Logger.Error("Failed to delete a Subscription Delete Request transaction record due to %v", err)
+ return
+ }
+ }
+ return
+}
+
+func (c *Control) handleSubscriptionDeleteFailure(params *xapp.RMRParams) (err error) {
+ xapp.Logger.Info("Subscription Delete Failure 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 {
+ err = errors.New("Unable to get Subscription Sequence Number from Payload due to: " + err.Error())
+ return
+ }
+ xapp.Logger.Info("Received payloadSeqNum: %v", payloadSeqNum)
+
+ // should here be IsValidSequenceNumber check?
+// c.timerMap.StopTimer(payloadSeqNum)
+
+ var transaction Transaction
+ transaction, err = c.tracker.RetriveTransaction(payloadSeqNum, DELETE)
+ if err != nil {
+ xapp.Logger.Error("Failed to retrive transaction record. Err %v", err)
+ xapp.Logger.Info("Further processing of this Subscription Delete Failure stopped. SubId: %v, Xid: %s",params.SubId, params.Xid)
+ return
+ }
+ xapp.Logger.Info("Subscription ID: %v, from address: %v:%v. Forwarding response to requestor...", int(payloadSeqNum), transaction.XappInstanceAddress, transaction.XappPort)
+
+ params.SubId = int(payloadSeqNum)
+ params.Xid = transaction.OrigParams.Xid
+ xapp.Logger.Info("Forwarding Subscription Delete Failure to UEEC: 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 requestor %v. SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+// return
+ }
+
+ time.Sleep(3 * time.Second)
+
+ xapp.Logger.Info("Starting routing manager update")
+ subRouteAction := SubRouteInfo{DELETE, transaction.XappInstanceAddress, transaction.XappPort, payloadSeqNum}
+ c.rtmgrClient.SubscriptionRequestUpdate(subRouteAction)
+
+ xapp.Logger.Info("Deleting trancaction record")
+ if c.registry.releaseSequenceNumber(payloadSeqNum) {
+ transaction, err = c.tracker.completeTransaction(payloadSeqNum, DELETE)
+ if err != nil {
+ xapp.Logger.Error("Failed to delete a Subscription Delete Request transaction record due to %v", err)
+ return
+ }
+ }
+ return
+}
+
+func (c *Control) handleSubscriptionDeleteRequestTimer(subId uint16) {
+ xapp.Logger.Info("Subscription Delete Request timer expired. SubId: %v",subId)
+/*
+ transaction, err := c.tracker.completeTransaction(subId, DELETE)
+ if err != nil {
+ xapp.Logger.Error("Failed to delete a Subscription Delete Request transaction record due to %v", err)
+ return
+ }
+ xapp.Logger.Info("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
+ payload := []byte("40CA4018000003EA7E00050000010016EA6300020021EA74000200C0")
+ params.PayloadLen = len(payload)
+ params.Payload = payload
+
+ xapp.Logger.Info("Forwarding Subscription Delete Failure to UEEC: Mtype: %v, SubId: %v, Xid: %s, Meid: %v",params.Mtype, params.SubId, params.Xid, params.Meid)
+ err = c.rmrReplyToSender(¶ms)
+ if err != nil {
+ xapp.Logger.Error("Failed to send response to requestor %v. SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+ }
+*/
+/*
+ time.Sleep(3 * time.Second)
+ xapp.Logger.Info("Subscription ID: %v, from address: %v:%v. Deleting transaction record", int(subId), transaction.XappInstanceAddress, transaction.XappPort)
+
+ xapp.Logger.Info("Starting routing manager update")
+ subRouteAction := SubRouteInfo{DELETE, transaction.XappInstanceAddress, transaction.XappPort, payloadSeqNum}
+ c.rtmgrClient.SubscriptionRequestUpdate(subRouteAction)
+
+ xapp.Logger.Info("Deleting trancaction record")
+ if c.registry.releaseSequenceNumber(payloadSeqNum) {
+ transaction, err = c.tracker.completeTransaction(payloadSeqNum, DELETE)
+ if err != nil {
+ xapp.Logger.Error("Failed to delete a Subscription Delete Request transaction record due to %v", err)
+ return
+ }
+ }
+*/
+ return
+ }