+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, Xid: %s, Payload %X", err, params.SubId, params.Xid, params.Payload)
+ 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))
+
+ transaction, responseReceived, err := c.tracker.CheckResponseReceived(payloadSeqNum, CREATE)
+ if err != nil {
+ xapp.Logger.Info("SubResp: Dropping this msg. Err: %v SubId: %v", err, payloadSeqNum)
+ return
+ }
+
+ if responseReceived == true {
+ // Subscription timer already received
+ return
+ }
+ xapp.Logger.Info("SubResp: SubId: %v, from address: %v:%v.", payloadSeqNum, transaction.Xappkey.Addr, transaction.Xappkey.Port)
+
+ c.registry.setSubscriptionToConfirmed(payloadSeqNum)
+
+ 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", payloadSeqNum, transaction.Xappkey.Addr, transaction.Xappkey.Port)
+ _, 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, Xid: %s, Payload %X", err, params.SubId, params.Xid, params.Payload)
+ return
+ }
+ xapp.Logger.Info("SubFail: Received payloadSeqNum: %v", payloadSeqNum)
+
+ c.timerMap.StopTimer("RIC_SUB_REQ", int(payloadSeqNum))
+
+ transaction, responseReceived, err := c.tracker.CheckResponseReceived(payloadSeqNum, CREATE)
+ if err != nil {
+ xapp.Logger.Info("SubFail: Dropping this msg. Err: %v SubId: %v", err, payloadSeqNum)
+ return
+ }
+
+ if responseReceived == true {
+ // Subscription timer already received
+ return
+ }
+ xapp.Logger.Info("SubFail: SubId: %v, from address: %v:%v. Forwarding response to xApp", payloadSeqNum, transaction.Xappkey.Addr, transaction.Xappkey.Port)
+
+ time.Sleep(3 * time.Second)
+
+ xapp.Logger.Info("SubFail: Starting routing manager update. SubId: %v, Xid: %s", params.SubId, params.Xid)
+ subRouteAction := transaction.SubRouteInfo()
+ 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) {
+ _, 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, tryCount uint64) {
+ subId := uint16(nbrId)
+ xapp.Logger.Info("handleSubTimer: SubReq timer expired. subId: %v, tryCount: %v", subId, tryCount)
+
+ transaction, responseReceived, err := c.tracker.CheckResponseReceived(subId, CREATE)
+ if err != nil {
+ xapp.Logger.Info("handleSubTimer: Dropping this timer action. Err: %v SubId: %v", err, subId)
+ return
+ }
+
+ if responseReceived == true {
+ // Subscription Response or Failure already received
+ return
+ }
+
+ if tryCount < maxSubReqTryCount {
+ xapp.Logger.Info("handleSubTimer: Resending SubReq to E2T: Mtype: %v, SubId: %v, Xid %s, Meid %v", transaction.OrigParams.Mtype, transaction.OrigParams.SubId, transaction.OrigParams.Xid, transaction.OrigParams.Meid)
+ // Set possible to handle new response for the subId
+ err = c.tracker.RetryTransaction(subId, CREATE)
+ if err != nil {
+ xapp.Logger.Error("handleSubDelTimer: Failed to retry transaction record. Dropping timer action. Err %v, SubId: %v", err, transaction.OrigParams.SubId)
+ return
+ }
+
+ err = c.rmrSend(transaction.OrigParams)
+ if err != nil {
+ xapp.Logger.Error("handleSubTimer: Failed to send request to E2T %v, SubId: %v, Xid: %s", err, transaction.OrigParams.SubId, transaction.OrigParams.Xid)
+ }
+
+ tryCount++
+ c.timerMap.StartTimer("RIC_SUB_REQ", int(subId), subReqTime, tryCount, c.handleSubscriptionRequestTimer)
+ return
+ }
+
+ var subDelReqPayload []byte
+ subDelReqPayload, err = c.e2ap.PackSubscriptionDeleteRequest(transaction.OrigParams.Payload, subId)
+ if err != nil {
+ xapp.Logger.Error("handleSubTimer: Packing SubDelReq failed. Err: %v", err)
+ return
+ }
+
+ // Cancel failed subscription
+ var params xapp.RMRParams
+ params.Mtype = 12020 // RIC SUBSCRIPTION DELETE
+ params.SubId = int(subId)
+ params.Xid = transaction.OrigParams.Xid
+ params.Meid = transaction.OrigParams.Meid
+ params.Src = transaction.OrigParams.Src
+ params.PayloadLen = len(subDelReqPayload)
+ params.Payload = subDelReqPayload
+ params.Mbuf = nil
+
+ // Delete CREATE transaction
+ _, err = c.tracker.completeTransaction(subId, CREATE)
+ if err != nil {
+ xapp.Logger.Error("handleSubTimer: Failed to delete create transaction record. Dropping this timer action. Err: %v, SubId: %v, Xid: %s", err, subId, params.Xid)
+ return
+ }
+
+ // Create DELETE transaction
+ var forwardRespToXapp bool = false
+ _, err = c.trackDeleteTransaction(¶ms, subId, forwardRespToXapp)
+ if err != nil {
+ xapp.Logger.Error("handleSubTimer: Failed to create delete transaction record. Dropping this timer action. Err: %v, SubId: %v, Xid: %s", err, subId, params.Xid)
+ return
+ }
+
+ xapp.Logger.Info("handleSubTimer: Sending SubDelReq to E2T: Mtype: %v, SubId: %v, Meid: %v", params.Mtype, params.SubId, params.Meid)
+ c.rmrSend(¶ms)
+ if err != nil {
+ xapp.Logger.Error("handleSubTimer: Failed to send request to E2T %v. SubId: %v, Xid: %s", err, params.SubId, params.Xid)
+ }
+ c.timerMap.StartTimer("RIC_SUB_DEL_REQ", int(subId), subDelReqTime, FirstTry, c.handleSubscriptionDeleteRequestTimer)
+ 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, Payload %X", err, params.SubId, params.Xid, params.Payload)
+ return
+ }
+ xapp.Logger.Info("SubDelReq: Received payloadSeqNum: %v", payloadSeqNum)
+
+ if c.registry.IsValidSequenceNumber(payloadSeqNum) {
+ var forwardRespToXapp bool = true
+ _, err = c.trackDeleteTransaction(params, payloadSeqNum, forwardRespToXapp)
+ 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
+ }
+ c.registry.setSubscriptionToUnConfirmed(payloadSeqNum)
+ } 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)
+ }
+ c.timerMap.StartTimer("RIC_SUB_DEL_REQ", int(payloadSeqNum), subDelReqTime, FirstTry, c.handleSubscriptionDeleteRequestTimer)
+ return
+}
+
+func (c *Control) trackDeleteTransaction(params *xapp.RMRParams, payloadSeqNum uint16, forwardRespToXapp bool) (transaction *Transaction, err error) {
+ srcAddr, srcPort, err := c.rtmgrClient.SplitSource(params.Src)
+ if err != nil {
+ xapp.Logger.Error("Failed to split source address. Err: %s, SubId: %v, Xid: %s", err, payloadSeqNum, params.Xid)
+ }
+ var respReceived bool = false
+ transaction, err = c.tracker.TrackTransaction(payloadSeqNum, DELETE, *srcAddr, *srcPort, params, respReceived, forwardRespToXapp)
+ 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: %v, SubId: %v, Xid: %s, Payload %X", err, params.SubId, params.Xid, params.Payload)
+ return
+ }
+ xapp.Logger.Info("SubDelResp: Received payloadSeqNum: %v", payloadSeqNum)
+
+ c.timerMap.StopTimer("RIC_SUB_DEL_REQ", int(payloadSeqNum))
+
+ transaction, responseReceived, err := c.tracker.CheckResponseReceived(payloadSeqNum, DELETE)
+ if err != nil {
+ xapp.Logger.Info("SubDelResp: Dropping this msg. Err: %v SubId: %v", err, payloadSeqNum)
+ return
+ }
+
+ if responseReceived == true {
+ // Subscription Delete timer already received
+ return
+ }
+ xapp.Logger.Info("SubDelResp: SubId: %v, from address: %v:%v. Forwarding response to xApp", payloadSeqNum, transaction.Xappkey.Addr, transaction.Xappkey.Port)
+
+ if transaction.ForwardRespToXapp == true {
+ 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)
+ }
+
+ 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.Xappkey.Addr, transaction.Xappkey.Port, 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) {
+ _, 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