X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?a=blobdiff_plain;f=pkg%2Fcontrol%2Fcontrol.go;h=ef27530e14491858efea0884c01815d4d988f98b;hb=662f68d35c10fa67382235a20e1e08c50359989a;hp=9a5022fc885319623947d6cf8f75bd31676eb51b;hpb=fbc56f981b7bd3387f7326401ceccbf31893a2ed;p=ric-plt%2Fsubmgr.git diff --git a/pkg/control/control.go b/pkg/control/control.go old mode 100644 new mode 100755 index 9a5022f..ef27530 --- a/pkg/control/control.go +++ b/pkg/control/control.go @@ -19,105 +19,676 @@ package control -/* -#include - -#cgo CFLAGS: -I../ -#cgo LDFLAGS: -lrmr_nng -lnng -*/ -import "C" - import ( - "errors" + "fmt" + "gerrit.o-ran-sc.org/r/ric-plt/e2ap/pkg/e2ap" + 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" - "strconv" + "sync" "time" ) +//----------------------------------------------------------------------------- +// +//----------------------------------------------------------------------------- + +var subReqTime time.Duration = 5 * time.Second +var subDelReqTime time.Duration = 5 * time.Second +var maxSubReqTryCount uint64 = 2 // Initial try + retry +var maxSubDelReqTryCount uint64 = 2 // Initial try + retry + type Control struct { - e2ap *E2ap - registry *Registry + e2ap *E2ap + registry *Registry + tracker *Tracker + timerMap *TimerMap + rmrSendMutex sync.Mutex + msgCounter uint64 +} + +type RMRMeid struct { + PlmnID string + EnbID string + RanName string } -var SEEDSN uint16 +var seedSN uint16 + +const ( + CREATE Action = 0 + MERGE Action = 1 + NONE Action = 2 + DELETE Action = 3 +) func init() { + xapp.Logger.Info("SUBMGR") viper.AutomaticEnv() viper.SetEnvPrefix("submgr") viper.AllowEmptyEnv(true) - SEEDSN = uint16(viper.GetInt("seed_sn")) - if SEEDSN == 0 { + seedSN = uint16(viper.GetInt("seed_sn")) + if seedSN == 0 { rand.Seed(time.Now().UnixNano()) - SEEDSN = uint16(rand.Intn(65535)) + seedSN = uint16(rand.Intn(65535)) } - if SEEDSN > 65535 { - SEEDSN = 0 + if seedSN > 65535 { + seedSN = 0 } - xapp.Logger.Info("SUBMGR: Initial Sequence Number: %v", SEEDSN) + xapp.Logger.Info("SUBMGR: Initial Sequence Number: %v", seedSN) } -func NewControl() Control { +func NewControl() *Control { + + 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} + registry := new(Registry) - registry.Initialize(SEEDSN) - return Control{new(E2ap), registry} + registry.Initialize(seedSN) + registry.rtmgrClient = &rtmgrClient + + tracker := new(Tracker) + tracker.Init() + + timerMap := new(TimerMap) + timerMap.Init() + + return &Control{e2ap: new(E2ap), + registry: registry, + tracker: tracker, + timerMap: timerMap, + msgCounter: 0, + } } 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, uint16(sub_id), payload}) - case C.RIC_SUB_RESP: - err = c.handleSubscriptionResponse(&RmrDatagram{mtype, uint16(sub_id), payload}) +func (c *Control) rmrSendRaw(desc string, params *RMRParams) (err error) { + + xapp.Logger.Info("%s: %s", desc, params.String()) + status := false + i := 1 + for ; i <= 10 && status == false; i++ { + c.rmrSendMutex.Lock() + status = xapp.Rmr.Send(params.RMRParams, false) + c.rmrSendMutex.Unlock() + if status == false { + xapp.Logger.Info("rmr.Send() failed. Retry count %d, %s", i, params.String()) + time.Sleep(500 * time.Millisecond) + } + } + if status == false { + err = fmt.Errorf("rmr.Send() failed. Retry count %d, %s", i, params.String()) + xapp.Logger.Error("%s: %s", desc, err.Error()) + xapp.Rmr.Free(params.Mbuf) + } + return +} + +func (c *Control) rmrSend(desc string, subs *Subscription, trans *Transaction) (err error) { + params := &RMRParams{&xapp.RMRParams{}} + params.Mtype = trans.GetMtype() + params.SubId = int(subs.GetSubId()) + params.Xid = "" + params.Meid = subs.GetMeid() + params.Src = "" + params.PayloadLen = len(trans.Payload.Buf) + params.Payload = trans.Payload.Buf + params.Mbuf = nil + + return c.rmrSendRaw(desc, params) +} + +func (c *Control) rmrReplyToSender(desc string, subs *Subscription, trans *Transaction) (err error) { + params := &RMRParams{&xapp.RMRParams{}} + params.Mtype = trans.GetMtype() + params.SubId = int(subs.GetSubId()) + params.Xid = trans.GetXid() + params.Meid = trans.GetMeid() + params.Src = "" + params.PayloadLen = len(trans.Payload.Buf) + params.Payload = trans.Payload.Buf + params.Mbuf = nil + + return c.rmrSendRaw(desc, params) +} + +func (c *Control) Consume(params *xapp.RMRParams) (err error) { + xapp.Rmr.Free(params.Mbuf) + params.Mbuf = nil + msg := &RMRParams{params} + c.msgCounter++ + 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: - err = errors.New("Message Type " + strconv.Itoa(mtype) + " is discarded") + xapp.Logger.Info("Unknown Message Type '%d', discarding", msg.Mtype) + } + + return nil +} + +func (c *Control) handleSubscriptionRequest(params *RMRParams) { + xapp.Logger.Info("SubReq from xapp: %s", params.String()) + + // + // + // + trans, err := c.tracker.TrackTransaction(NewRmrEndpoint(params.Src), + params.Xid, + params.Meid, + false, + true) + + if err != nil { + xapp.Logger.Error("SubReq: %s, Dropping this msg. %s", err.Error(), params.String()) + return + } + + // + // + // + trans.SubReqMsg, err = c.e2ap.UnpackSubscriptionRequest(params.Payload) + if err != nil { + xapp.Logger.Error("SubReq: %s Dropping this msg. %s", err.Error(), trans) + trans.Release() + return + } + + // + // + // + subs, err := c.registry.ReserveSubscription(&trans.RmrEndpoint, trans.Meid) + if err != nil { + xapp.Logger.Error("SubReq: %s, Dropping this msg. %s", err.Error(), trans) + trans.Release() + return + } + + err = subs.SetTransaction(trans) + if err != nil { + xapp.Logger.Error("SubReq: %s, Dropping this msg. %s", err.Error(), trans) + subs.Release() + trans.Release() + return + } + + trans.SubReqMsg.RequestId.Seq = uint32(subs.GetSubId()) + + // + // TODO: subscription create is in fact owned by subscription and not transaction. + // Transaction is toward xapp while Subscription is toward ran. + // In merge several xapps may wake transactions, while only one subscription + // toward ran occurs -> subscription owns subscription creation toward ran + // + // This is intermediate solution while improving message handling + // + trans.Mtype, trans.Payload, err = c.e2ap.PackSubscriptionRequest(trans.SubReqMsg) + if err != nil { + xapp.Logger.Error("SubReq: %s for trans %s", err.Error(), trans) + subs.Release() + trans.Release() + return + } + + c.rmrSend("SubReq: SubReq to E2T", subs, trans) + + c.timerMap.StartTimer("RIC_SUB_REQ", int(subs.GetSubId()), subReqTime, FirstTry, c.handleSubscriptionRequestTimer) + xapp.Logger.Debug("SubReq: Debugging trans table = %v", c.tracker.transactionXappTable) + return +} + +func (c *Control) handleSubscriptionResponse(params *RMRParams) { + xapp.Logger.Info("SubResp from E2T: %s", params.String()) + + // + // + // + SubRespMsg, err := c.e2ap.UnpackSubscriptionResponse(params.Payload) + if err != nil { + xapp.Logger.Error("SubResp: %s Dropping this msg. %s", err.Error(), params.String()) + return + } + + // + // + // + subs := c.registry.GetSubscription(uint16(SubRespMsg.RequestId.Seq)) + if subs == nil && params.SubId > 0 { + subs = c.registry.GetSubscription(uint16(params.SubId)) + } + + if subs == nil { + xapp.Logger.Error("SubResp: Not valid subscription found payloadSeqNum: %d, SubId: %d. Dropping this msg. %s", SubRespMsg.RequestId.Seq, params.SubId, params.String()) + return + } + xapp.Logger.Info("SubResp: subscription found payloadSeqNum: %d, SubId: %d", SubRespMsg.RequestId.Seq, subs.GetSubId()) + + // + // + // + trans := subs.GetTransaction() + if trans == nil { + xapp.Logger.Error("SubResp: Unknown trans. Dropping this msg. SubId: %d", subs.GetSubId()) + return + } + + trans.SubRespMsg = SubRespMsg + + // + // + // + c.timerMap.StopTimer("RIC_SUB_REQ", int(subs.GetSubId())) + + responseReceived := trans.CheckResponseReceived() + if responseReceived == true { + // Subscription timer already received + return + } + + trans.Mtype, trans.Payload, err = c.e2ap.PackSubscriptionResponse(trans.SubRespMsg) + if err != nil { + xapp.Logger.Error("SubResp: %s for trans %s", err.Error(), trans) + trans.Release() + return + } + + subs.Confirmed() + trans.Release() + c.rmrReplyToSender("SubResp: SubResp to xapp", subs, trans) + return +} + +func (c *Control) handleSubscriptionFailure(params *RMRParams) { + xapp.Logger.Info("SubFail from E2T: %s", params.String()) + + // + // + // + SubFailMsg, err := c.e2ap.UnpackSubscriptionFailure(params.Payload) + if err != nil { + xapp.Logger.Error("SubFail: %s Dropping this msg. %s", err.Error(), params.String()) + return + } + + // + // + // + subs := c.registry.GetSubscription(uint16(SubFailMsg.RequestId.Seq)) + if subs == nil && params.SubId > 0 { + subs = c.registry.GetSubscription(uint16(params.SubId)) + } + + if subs == nil { + xapp.Logger.Error("SubFail: Not valid subscription found payloadSeqNum: %d, SubId: %d. Dropping this msg. %s", SubFailMsg.RequestId.Seq, params.SubId, params.String()) + return + } + xapp.Logger.Info("SubFail: subscription found payloadSeqNum: %d, SubId: %d", SubFailMsg.RequestId.Seq, subs.GetSubId()) + + // + // + // + trans := subs.GetTransaction() + if trans == nil { + xapp.Logger.Error("SubFail: Unknown trans. Dropping this msg. SubId: %d", subs.GetSubId()) + return + } + trans.SubFailMsg = SubFailMsg + + // + // + // + c.timerMap.StopTimer("RIC_SUB_REQ", int(subs.GetSubId())) + + responseReceived := trans.CheckResponseReceived() + if err != nil { + return + } + + if responseReceived == true { + // Subscription timer already received + return + } + + trans.Mtype, trans.Payload, err = c.e2ap.PackSubscriptionFailure(trans.SubFailMsg) + if err == nil { + c.rmrReplyToSender("SubFail: SubFail to xapp", subs, trans) + time.Sleep(3 * time.Second) + } else { + //TODO error handling improvement + xapp.Logger.Error("SubFail: %s for trans %s (continuing cleaning)", err.Error(), trans) } + + trans.Release() + subs.Release() return } -func (c *Control) rmrSend(datagram *RmrDatagram) (err error) { - if !xapp.Rmr.Send(datagram.MessageType, int(datagram.SubscriptionId), len(datagram.Payload), datagram.Payload) { - err = errors.New("rmr.Send() failed") +func (c *Control) handleSubscriptionRequestTimer(strId string, nbrId int, tryCount uint64) { + xapp.Logger.Info("SubReq timeout: subId: %v, tryCount: %v", nbrId, tryCount) + + subs := c.registry.GetSubscription(uint16(nbrId)) + if subs == nil { + xapp.Logger.Error("SubReq timeout: Unknown payloadSeqNum. Dropping this msg. SubId: %v", nbrId) + return + } + + trans := subs.GetTransaction() + if trans == nil { + xapp.Logger.Error("SubReq timeout: Unknown trans. Dropping this msg. SubId: %v", subs.GetSubId()) + return + } + + responseReceived := trans.CheckResponseReceived() + + if responseReceived == true { + // Subscription Response or Failure already received + return } + + if tryCount < maxSubReqTryCount { + xapp.Logger.Info("SubReq timeout: subs: %s trans: %s", subs, trans) + + trans.RetryTransaction() + + c.rmrSend("SubReq timeout: SubReq to E2T", subs, trans) + + tryCount++ + c.timerMap.StartTimer("RIC_SUB_REQ", int(subs.GetSubId()), subReqTime, tryCount, c.handleSubscriptionRequestTimer) + return + } + + // Release CREATE transaction + trans.Release() + + // Create DELETE transaction (internal and no messages toward xapp) + deltrans, err := c.tracker.TrackTransaction(&trans.RmrEndpoint, + trans.GetXid(), + trans.GetMeid(), + false, + false) + + if err != nil { + xapp.Logger.Error("SubReq timeout: %s, Dropping this msg.", err.Error()) + //TODO improve error handling. Important at least in merge + subs.Release() + return + } + + deltrans.SubDelReqMsg = &e2ap.E2APSubscriptionDeleteRequest{} + deltrans.SubDelReqMsg.RequestId.Id = trans.SubReqMsg.RequestId.Id + deltrans.SubDelReqMsg.RequestId.Seq = uint32(subs.GetSubId()) + deltrans.SubDelReqMsg.FunctionId = trans.SubReqMsg.FunctionId + deltrans.Mtype, deltrans.Payload, err = c.e2ap.PackSubscriptionDeleteRequest(deltrans.SubDelReqMsg) + if err != nil { + xapp.Logger.Error("SubReq timeout: Packing SubDelReq failed. Err: %v", err) + //TODO improve error handling. Important at least in merge + deltrans.Release() + subs.Release() + return + } + + err = subs.SetTransaction(deltrans) + if err != nil { + xapp.Logger.Error("SubReq timeout: %s, Dropping this msg.", err.Error()) + //TODO improve error handling. Important at least in merge + deltrans.Release() + return + } + + c.rmrSend("SubReq timer: SubDelReq to E2T", subs, deltrans) + c.timerMap.StartTimer("RIC_SUB_DEL_REQ", int(subs.GetSubId()), subDelReqTime, FirstTry, c.handleSubscriptionDeleteRequestTimer) return } -func (c *Control) handleSubscriptionRequest(datagram *RmrDatagram) (err error) { - payload_seq_num, err := c.e2ap.GetSubscriptionRequestSequenceNumber(datagram.Payload) +func (c *Control) handleSubscriptionDeleteRequest(params *RMRParams) { + xapp.Logger.Info("SubDelReq from xapp: %s", params.String()) + + // + // + // + trans, err := c.tracker.TrackTransaction(NewRmrEndpoint(params.Src), + params.Xid, + params.Meid, + false, + true) + + if err != nil { + xapp.Logger.Error("SubDelReq: %s, Dropping this msg. %s", err.Error(), params.String()) + return + } + + // + // + // + trans.SubDelReqMsg, err = c.e2ap.UnpackSubscriptionDeleteRequest(params.Payload) + if err != nil { + xapp.Logger.Error("SubDelReq: %s Dropping this msg. %s", err.Error(), trans) + trans.Release() + return + } + + // + // + // + subs := c.registry.GetSubscription(uint16(trans.SubDelReqMsg.RequestId.Seq)) + if subs == nil && params.SubId > 0 { + subs = c.registry.GetSubscription(uint16(params.SubId)) + } + + if subs == nil { + xapp.Logger.Error("SubDelReq: Not valid subscription found payloadSeqNum: %d, SubId: %d. Dropping this msg. %s", trans.SubDelReqMsg.RequestId.Seq, params.SubId, trans) + trans.Release() + return + } + xapp.Logger.Info("SubDelReq: subscription found payloadSeqNum: %d, SubId: %d. %s", trans.SubDelReqMsg.RequestId.Seq, params.SubId, trans) + + err = subs.SetTransaction(trans) if err != nil { - err = errors.New("Unable to get Subscription Sequence Number from Payload due to: " + err.Error()) + xapp.Logger.Error("SubDelReq: %s, Dropping this msg. %s", err.Error(), trans) + trans.Release() return } - xapp.Logger.Info("Subscription Request Received. RMR SUBSCRIPTION_ID: %v | PAYLOAD SEQUENCE_NUMBER: %v", datagram.SubscriptionId, payload_seq_num) - new_sub_id := c.registry.ReserveSequenceNumber() - payload, err := c.e2ap.SetSubscriptionRequestSequenceNumber(datagram.Payload, new_sub_id) + + // + // TODO: subscription delete is in fact owned by subscription and not transaction. + // Transaction is toward xapp while Subscription is toward ran. + // In merge several xapps may wake transactions, while only one subscription + // toward ran occurs -> subscription owns subscription creation toward ran + // + // This is intermediate solution while improving message handling + // + trans.Mtype, trans.Payload, err = c.e2ap.PackSubscriptionDeleteRequest(trans.SubDelReqMsg) if err != nil { - err = errors.New("Unable to set Subscription Sequence Number in Payload due to: " + err.Error()) + xapp.Logger.Error("SubDelReq: %s for trans %s", err.Error(), trans) + trans.Release() return } - xapp.Logger.Info("Generated ID: %v. Forwarding to E2 Termination...", int(new_sub_id)) - c.rmrSend(&RmrDatagram{C.RIC_SUB_REQ, new_sub_id, payload}) + + subs.UnConfirmed() + + c.rmrSend("SubDelReq: SubDelReq to E2T", subs, trans) + + c.timerMap.StartTimer("RIC_SUB_DEL_REQ", int(subs.GetSubId()), subDelReqTime, FirstTry, c.handleSubscriptionDeleteRequestTimer) return } -func (c *Control) handleSubscriptionResponse(datagram *RmrDatagram) (err error) { - payload_seq_num, err := c.e2ap.GetSubscriptionResponseSequenceNumber(datagram.Payload) +func (c *Control) handleSubscriptionDeleteResponse(params *RMRParams) (err error) { + xapp.Logger.Info("SubDelResp from E2T:%s", params.String()) + + // + // + // + SubDelRespMsg, err := c.e2ap.UnpackSubscriptionDeleteResponse(params.Payload) if err != nil { - err = errors.New("Unable to get Subscription Sequence Number from Payload due to: " + err.Error()) + xapp.Logger.Error("SubDelResp: %s Dropping this msg. %s", err.Error(), params.String()) return } - xapp.Logger.Info("Subscription Response Received. RMR SUBSCRIPTION_ID: %v | PAYLOAD SEQUENCE_NUMBER: %v", datagram.SubscriptionId, payload_seq_num) - if !c.registry.IsValidSequenceNumber(payload_seq_num) { - err = errors.New("Unknown Subscription ID: " + strconv.Itoa(int(payload_seq_num)) + " in Subscritpion Response. Message discarded.") + + // + // + // + subs := c.registry.GetSubscription(uint16(SubDelRespMsg.RequestId.Seq)) + if subs == nil && params.SubId > 0 { + subs = c.registry.GetSubscription(uint16(params.SubId)) + } + + if subs == nil { + xapp.Logger.Error("SubDelResp: Not valid subscription found payloadSeqNum: %d, SubId: %d. Dropping this msg. %s", SubDelRespMsg.RequestId.Seq, params.SubId, params.String()) + return + } + xapp.Logger.Info("SubDelResp: subscription found payloadSeqNum: %d, SubId: %d", SubDelRespMsg.RequestId.Seq, subs.GetSubId()) + + // + // + // + trans := subs.GetTransaction() + if trans == nil { + xapp.Logger.Error("SubDelResp: Unknown trans. Dropping this msg. SubId: %d", subs.GetSubId()) + return + } + + trans.SubDelRespMsg = SubDelRespMsg + + // + // + // + c.timerMap.StopTimer("RIC_SUB_DEL_REQ", int(subs.GetSubId())) + + responseReceived := trans.CheckResponseReceived() + if responseReceived == true { + // Subscription Delete timer already received + return + } + + c.sendSubscriptionDeleteResponse("SubDelResp", trans, subs) + return +} + +func (c *Control) handleSubscriptionDeleteFailure(params *RMRParams) { + xapp.Logger.Info("SubDelFail from E2T:%s", params.String()) + + // + // + // + SubDelFailMsg, err := c.e2ap.UnpackSubscriptionDeleteFailure(params.Payload) + if err != nil { + xapp.Logger.Error("SubDelFail: %s Dropping this msg. %s", err.Error(), params.String()) + return + } + + // + // + // + subs := c.registry.GetSubscription(uint16(SubDelFailMsg.RequestId.Seq)) + if subs == nil && params.SubId > 0 { + subs = c.registry.GetSubscription(uint16(params.SubId)) + } + + if subs == nil { + xapp.Logger.Error("SubDelFail: Not valid subscription found payloadSeqNum: %d, SubId: %d. Dropping this msg. %s", SubDelFailMsg.RequestId.Seq, params.SubId, params.String()) + return + } + xapp.Logger.Info("SubDelFail: subscription found payloadSeqNum: %d, SubId: %d", SubDelFailMsg.RequestId.Seq, subs.GetSubId()) + + // + // + // + trans := subs.GetTransaction() + if trans == nil { + xapp.Logger.Error("SubDelFail: Unknown trans. Dropping this msg. SubId: %d", subs.GetSubId()) + return + } + trans.SubDelFailMsg = SubDelFailMsg + + // + // + // + c.timerMap.StopTimer("RIC_SUB_DEL_REQ", int(subs.GetSubId())) + + responseReceived := trans.CheckResponseReceived() + if responseReceived == true { + // Subscription Delete timer already received + return + } + + c.sendSubscriptionDeleteResponse("SubDelFail", trans, subs) + return +} + +func (c *Control) handleSubscriptionDeleteRequestTimer(strId string, nbrId int, tryCount uint64) { + xapp.Logger.Info("SubDelReq timeout: subId: %v, tryCount: %v", nbrId, tryCount) + + subs := c.registry.GetSubscription(uint16(nbrId)) + if subs == nil { + xapp.Logger.Error("SubDelReq timeout: Unknown payloadSeqNum. Dropping this msg. SubId: %v", nbrId) + return + } + + trans := subs.GetTransaction() + if trans == nil { + xapp.Logger.Error("SubDelReq timeout: Unknown trans. Dropping this msg. SubId: %v", subs.GetSubId()) return } - c.registry.setSubscriptionToConfirmed(payload_seq_num) - xapp.Logger.Info("Subscription Response Registered. Forwarding to Requestor...") - c.rmrSend(&RmrDatagram{C.RIC_SUB_RESP, payload_seq_num, datagram.Payload}) + + responseReceived := trans.CheckResponseReceived() + if responseReceived == true { + // Subscription Delete Response or Failure already received + return + } + + if tryCount < maxSubDelReqTryCount { + // Set possible to handle new response for the subId + trans.RetryTransaction() + c.rmrSend("SubDelReq timeout: SubDelReq to E2T", subs, trans) + tryCount++ + c.timerMap.StartTimer("RIC_SUB_DEL_REQ", int(subs.GetSubId()), subReqTime, tryCount, c.handleSubscriptionDeleteRequestTimer) + return + } + + c.sendSubscriptionDeleteResponse("SubDelReq(timer)", trans, subs) return } + +func (c *Control) sendSubscriptionDeleteResponse(desc string, trans *Transaction, subs *Subscription) { + + if trans.ForwardRespToXapp == true { + //Always generate SubDelResp + trans.SubDelRespMsg = &e2ap.E2APSubscriptionDeleteResponse{} + trans.SubDelRespMsg.RequestId.Id = trans.SubDelReqMsg.RequestId.Id + trans.SubDelRespMsg.RequestId.Seq = uint32(subs.GetSubId()) + trans.SubDelRespMsg.FunctionId = trans.SubDelReqMsg.FunctionId + + var err error + trans.Mtype, trans.Payload, err = c.e2ap.PackSubscriptionDeleteResponse(trans.SubDelRespMsg) + if err == nil { + c.rmrReplyToSender(desc+": SubDelResp to xapp", subs, trans) + time.Sleep(3 * time.Second) + } else { + //TODO error handling improvement + xapp.Logger.Error("%s: %s for trans %s (continuing cleaning)", desc, err.Error(), trans) + } + } + + trans.Release() + subs.Release() +}