X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?a=blobdiff_plain;f=pkg%2Fcontrol%2Fcontrol.go;h=9ce34a07dc51596b3b07d56f6e09d2423e5db9fc;hb=4dd78f715b6ce0d4ea65ad73c3c5771f1599cbef;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..9ce34a0 --- a/pkg/control/control.go +++ b/pkg/control/control.go @@ -19,105 +19,652 @@ package control -/* -#include - -#cgo CFLAGS: -I../ -#cgo LDFLAGS: -lrmr_nng -lnng -*/ -import "C" - import ( "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" - "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 + rtmgrClient *RtmgrClient + 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 { registry := new(Registry) - registry.Initialize(SEEDSN) - return Control{new(E2ap), registry} + registry.Initialize(seedSN) + + tracker := new(Tracker) + tracker.Init() + + timerMap := new(TimerMap) + timerMap.Init() + + 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{e2ap: new(E2ap), + registry: registry, + rtmgrClient: &rtmgrClient, + 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) 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) { + 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 *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 */ + subs := c.registry.ReserveSubscription() + if subs == nil { + xapp.Logger.Error("SubReq: Failed to reserve sequence number. Dropping this msg. SubId: %v, Xid: %s", params.SubId, params.Xid) + return + } + + params.SubId = int(subs.Seq) + err := c.e2ap.SetSubscriptionRequestSequenceNumber(params.Payload, subs.Seq) + if err != nil { + xapp.Logger.Error("SubReq: 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) + c.registry.releaseSequenceNumber(subs.Seq) + 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) + c.registry.releaseSequenceNumber(subs.Seq) + return + } + + // Create transatcion record for every subscription request + var forwardRespToXapp bool = true + var responseReceived bool = false + transaction, err := c.tracker.TrackTransaction(subs.Seq, CREATE, *srcAddr, *srcPort, params, responseReceived, forwardRespToXapp) + 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) + c.registry.releaseSequenceNumber(subs.Seq) + return + } + + // Update routing manager about the new subscription + subRouteAction := transaction.SubRouteInfo() + 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 msg. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid) + c.registry.releaseSequenceNumber(subs.Seq) + return + } + + // Setting new subscription ID in the RMR header + xapp.Logger.Info("SubReq: 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) + } + c.timerMap.StartTimer("RIC_SUB_REQ", int(subs.Seq), subReqTime, FirstTry, c.handleSubscriptionRequestTimer) + xapp.Logger.Debug("SubReq: Debugging transaction table = %v", c.tracker.transactionTable) 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) 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 } return } -func (c *Control) handleSubscriptionRequest(datagram *RmrDatagram) (err error) { - payload_seq_num, err := c.e2ap.GetSubscriptionRequestSequenceNumber(datagram.Payload) +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 { - err = errors.New("Unable to get Subscription Sequence Number from Payload due to: " + err.Error()) + xapp.Logger.Error("SubDelFail: 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("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) + xapp.Logger.Info("SubDelFail: Received payloadSeqNum: %v", payloadSeqNum) + + c.timerMap.StopTimer("RIC_SUB_DEL_REQ", int(payloadSeqNum)) + + transaction, responseReceived, err := c.tracker.CheckResponseReceived(payloadSeqNum, DELETE) if err != nil { - err = errors.New("Unable to set Subscription Sequence Number in Payload due to: " + err.Error()) + xapp.Logger.Info("SubDelFail: Dropping this msg. Err: %v SubId: %v", err, payloadSeqNum) + return + } + + if responseReceived == true { + // Subscription Delete timer already received + return + } + xapp.Logger.Info("SubDelFail: SubId: %v, from address: %v:%v. Forwarding response to xApp", payloadSeqNum, transaction.Xappkey.Addr, transaction.Xappkey.Port) + + if transaction.ForwardRespToXapp == true { + var subDelRespPayload []byte + subDelRespPayload, err = c.e2ap.PackSubscriptionDeleteResponse(transaction.OrigParams.Payload, payloadSeqNum) + if err != nil { + xapp.Logger.Error("SubDelFail:Packing SubDelResp failed. Err: %v", err) + return + } + + params.Mtype = 12021 // RIC SUBSCRIPTION DELETE RESPONSE + params.SubId = int(payloadSeqNum) + params.Xid = transaction.OrigParams.Xid + params.Meid = transaction.OrigParams.Meid + params.Src = transaction.OrigParams.Src + params.PayloadLen = len(subDelRespPayload) + params.Payload = subDelRespPayload + params.Mbuf = nil + xapp.Logger.Info("SubDelFail: 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("SubDelFail: Failed to send SubDelFail to xApp. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid) + } + + 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.Xappkey.Addr, transaction.Xappkey.Port, payloadSeqNum} + err = 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) { + _, 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. Err: %v, SubId: %v, Xid: %s", err, params.SubId, params.Xid) 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}) return } -func (c *Control) handleSubscriptionResponse(datagram *RmrDatagram) (err error) { - payload_seq_num, err := c.e2ap.GetSubscriptionResponseSequenceNumber(datagram.Payload) +func (c *Control) handleSubscriptionDeleteRequestTimer(strId string, nbrId int, tryCount uint64) { + subId := uint16(nbrId) + xapp.Logger.Info("handleSubDelTimer: SubDelReq timer expired. subId: %v, tryCount: %v", subId, tryCount) + + transaction, responseReceived, err := c.tracker.CheckResponseReceived(subId, DELETE) if err != nil { - err = errors.New("Unable to get Subscription Sequence Number from Payload due to: " + err.Error()) + xapp.Logger.Info("handleSubTimer: Dropping this timer action. Err: %v SubId: %v", err, subId) + return + } + + if responseReceived == true { + // Subscription Delete Response or Failure already received + return + } + + if tryCount < maxSubDelReqTryCount { + xapp.Logger.Info("handleSubDelTimer: Resending SubDelReq 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, DELETE) + 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("handleSubDelTimer: Failed to send request to E2T %v, SubId: %v, Xid: %s", err, transaction.OrigParams.SubId, transaction.OrigParams.Xid) + } + + tryCount++ + c.timerMap.StartTimer("RIC_SUB_DEL_REQ", int(subId), subReqTime, tryCount, c.handleSubscriptionDeleteRequestTimer) 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.") + + var params xapp.RMRParams + if transaction.ForwardRespToXapp == true { + var subDelRespPayload []byte + subDelRespPayload, err = c.e2ap.PackSubscriptionDeleteResponse(transaction.OrigParams.Payload, subId) + if err != nil { + xapp.Logger.Error("handleSubDelTimer: Unable to pack payload. Dropping this timer action. Err: %v, SubId: %v, Xid: %s, Payload %x", err, subId, transaction.OrigParams.Xid, transaction.OrigParams.Payload) + return + } + + params.Mtype = 12021 // RIC SUBSCRIPTION DELETE RESPONSE + params.SubId = int(subId) + params.Meid = transaction.OrigParams.Meid + params.Xid = transaction.OrigParams.Xid + params.Src = transaction.OrigParams.Src + params.PayloadLen = len(subDelRespPayload) + params.Payload = subDelRespPayload + params.Mbuf = nil + + xapp.Logger.Info("handleSubDelTimer: Sending SubDelResp to xApp: 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("handleSubDelTimer: 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("handleSubDelTimer: Starting routing manager update. SubId: %v, Xid: %s", subId, params.Xid) + subRouteAction := SubRouteInfo{DELETE, transaction.Xappkey.Addr, transaction.Xappkey.Port, subId} + err = c.rtmgrClient.SubscriptionRequestUpdate(subRouteAction) + if err != nil { + xapp.Logger.Error("handleSubDelTimer: Failed to update routing manager. Err: %v, SubId: %v, Xid: %s", err, subId, params.Xid) 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}) + + xapp.Logger.Info("handleSubDelTimer: Deleting transaction record. SubId: %v, Xid: %s", subId, params.Xid) + if c.registry.releaseSequenceNumber(subId) { + _, err = c.tracker.completeTransaction(subId, DELETE) + if err != nil { + xapp.Logger.Error("handleSubDelTimer: Failed to delete transaction record. Err: %v, SubId: %v, Xid: %s", err, subId, params.Xid) + return + } + } else { + xapp.Logger.Error("handleSubDelTimer: Failed to release sequency number. SubId: %v, Xid: %s", subId, params.Xid) + } return }