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gsm_handler.go
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// SPDX-FileCopyrightText: 2022-present Intel Corporation
// SPDX-FileCopyrightText: 2021 Open Networking Foundation <[email protected]>
// Copyright 2019 free5GC.org
//
// SPDX-License-Identifier: Apache-2.0
package context
import (
"github.com/omec-project/nas/nasConvert"
"github.com/omec-project/nas/nasMessage"
)
func (smContext *SMContext) HandlePDUSessionEstablishmentRequest(req *nasMessage.PDUSessionEstablishmentRequest) {
// Retrieve PDUSessionID
smContext.PDUSessionID = int32(req.PDUSessionID.GetPDUSessionID())
// Retrieve PTI (Procedure transaction identity)
smContext.Pti = req.GetPTI()
// Handle PDUSessionType
if req.PDUSessionType != nil {
requestedPDUSessionType := req.PDUSessionType.GetPDUSessionTypeValue()
if err := smContext.isAllowedPDUSessionType(requestedPDUSessionType); err != nil {
smContext.SubCtxLog.Errorf("%s", err)
return
}
} else {
// Set to default supported PDU Session Type
switch SMF_Self().SupportedPDUSessionType {
case "IPv4":
smContext.SelectedPDUSessionType = nasMessage.PDUSessionTypeIPv4
case "IPv6":
smContext.SelectedPDUSessionType = nasMessage.PDUSessionTypeIPv6
case "IPv4v6":
smContext.SelectedPDUSessionType = nasMessage.PDUSessionTypeIPv4IPv6
case "Ethernet":
smContext.SelectedPDUSessionType = nasMessage.PDUSessionTypeEthernet
default:
smContext.SelectedPDUSessionType = nasMessage.PDUSessionTypeIPv4
}
}
if req.ExtendedProtocolConfigurationOptions != nil {
EPCOContents := req.ExtendedProtocolConfigurationOptions.GetExtendedProtocolConfigurationOptionsContents()
protocolConfigurationOptions := nasConvert.NewProtocolConfigurationOptions()
unmarshalErr := protocolConfigurationOptions.UnMarshal(EPCOContents)
if unmarshalErr != nil {
smContext.SubGsmLog.Errorf("parsing PCO failed: %s", unmarshalErr)
}
smContext.SubGsmLog.Infoln("protocol Configuration Options")
smContext.SubGsmLog.Infoln(protocolConfigurationOptions)
// Send MTU to UE always even if UE does not request it.
// Preconfiguring MTU request flag.
smContext.ProtocolConfigurationOptions.IPv4LinkMTURequest = true
for _, container := range protocolConfigurationOptions.ProtocolOrContainerList {
smContext.SubGsmLog.Debugln("Container ID:", container.ProtocolOrContainerID)
smContext.SubGsmLog.Debugln("Container Length:", container.LengthOfContents)
switch container.ProtocolOrContainerID {
case nasMessage.PCSCFIPv6AddressRequestUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type PCSCFIPv6AddressRequestUL")
case nasMessage.IMCNSubsystemSignalingFlagUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type IMCNSubsystemSignalingFlagUL")
case nasMessage.DNSServerIPv6AddressRequestUL:
smContext.ProtocolConfigurationOptions.DNSIPv6Request = true
case nasMessage.NotSupportedUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type NotSupportedUL")
case nasMessage.MSSupportOfNetworkRequestedBearerControlIndicatorUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type MSSupportOfNetworkRequestedBearerControlIndicatorUL")
case nasMessage.DSMIPv6HomeAgentAddressRequestUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type DSMIPv6HomeAgentAddressRequestUL")
case nasMessage.DSMIPv6HomeNetworkPrefixRequestUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type DSMIPv6HomeNetworkPrefixRequestUL")
case nasMessage.DSMIPv6IPv4HomeAgentAddressRequestUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type DSMIPv6IPv4HomeAgentAddressRequestUL")
case nasMessage.IPAddressAllocationViaNASSignallingUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type IPAddressAllocationViaNASSignallingUL")
case nasMessage.IPv4AddressAllocationViaDHCPv4UL:
smContext.SubGsmLog.Infoln("Didn't Implement container type IPv4AddressAllocationViaDHCPv4UL")
case nasMessage.PCSCFIPv4AddressRequestUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type PCSCFIPv4AddressRequestUL")
case nasMessage.DNSServerIPv4AddressRequestUL:
smContext.ProtocolConfigurationOptions.DNSIPv4Request = true
case nasMessage.MSISDNRequestUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type MSISDNRequestUL")
case nasMessage.IFOMSupportRequestUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type IFOMSupportRequestUL")
case nasMessage.MSSupportOfLocalAddressInTFTIndicatorUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type MSSupportOfLocalAddressInTFTIndicatorUL")
case nasMessage.PCSCFReSelectionSupportUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type PCSCFReSelectionSupportUL")
case nasMessage.NBIFOMRequestIndicatorUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type NBIFOMRequestIndicatorUL")
case nasMessage.NBIFOMModeUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type NBIFOMModeUL")
case nasMessage.NonIPLinkMTURequestUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type NonIPLinkMTURequestUL")
case nasMessage.APNRateControlSupportIndicatorUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type APNRateControlSupportIndicatorUL")
case nasMessage.UEStatus3GPPPSDataOffUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type UEStatus3GPPPSDataOffUL")
case nasMessage.ReliableDataServiceRequestIndicatorUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type ReliableDataServiceRequestIndicatorUL")
case nasMessage.AdditionalAPNRateControlForExceptionDataSupportIndicatorUL:
smContext.SubGsmLog.Infoln(
"Didn't Implement container type AdditionalAPNRateControlForExceptionDataSupportIndicatorUL",
)
case nasMessage.PDUSessionIDUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type PDUSessionIDUL")
case nasMessage.EthernetFramePayloadMTURequestUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type EthernetFramePayloadMTURequestUL")
case nasMessage.UnstructuredLinkMTURequestUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type UnstructuredLinkMTURequestUL")
case nasMessage.I5GSMCauseValueUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type 5GSMCauseValueUL")
case nasMessage.QoSRulesWithTheLengthOfTwoOctetsSupportIndicatorUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type QoSRulesWithTheLengthOfTwoOctetsSupportIndicatorUL")
case nasMessage.QoSFlowDescriptionsWithTheLengthOfTwoOctetsSupportIndicatorUL:
smContext.SubGsmLog.Infoln(
"Didn't Implement container type QoSFlowDescriptionsWithTheLengthOfTwoOctetsSupportIndicatorUL",
)
case nasMessage.LinkControlProtocolUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type LinkControlProtocolUL")
case nasMessage.PushAccessControlProtocolUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type PushAccessControlProtocolUL")
case nasMessage.ChallengeHandshakeAuthenticationProtocolUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type ChallengeHandshakeAuthenticationProtocolUL")
case nasMessage.InternetProtocolControlProtocolUL:
smContext.SubGsmLog.Infoln("Didn't Implement container type InternetProtocolControlProtocolUL")
default:
smContext.SubGsmLog.Infof("Unknown Container ID [%d]", container.ProtocolOrContainerID)
}
}
}
}
func (smContext *SMContext) HandlePDUSessionReleaseRequest(req *nasMessage.PDUSessionReleaseRequest) {
smContext.SubGsmLog.Infof("Handle Pdu Session Release Request")
// Retrieve PTI (Procedure transaction identity)
smContext.Pti = req.GetPTI()
// Release UE IP Addr
err := smContext.ReleaseUeIpAddr()
if err != nil {
smContext.SubGsmLog.Errorf("release UE IP Addr failed: %s", err)
}
}