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nas.go
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nas.go
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// Copyright 2019 free5GC.org
//
// SPDX-License-Identifier: Apache-2.0
//
package nas
import (
"bytes"
"encoding/binary"
"fmt"
"github.com/omec-project/nas/nasMessage"
)
// Message TODO：description
type Message struct {
SecurityHeader
*GmmMessage
*GsmMessage
}
// SecurityHeader TODO：description
type SecurityHeader struct {
ProtocolDiscriminator uint8
SecurityHeaderType uint8
MessageAuthenticationCode uint32
SequenceNumber uint8
}
const (
SecurityHeaderTypePlainNas uint8 = 0x00
SecurityHeaderTypeIntegrityProtected uint8 = 0x01
SecurityHeaderTypeIntegrityProtectedAndCiphered uint8 = 0x02
SecurityHeaderTypeIntegrityProtectedWithNew5gNasSecurityContext uint8 = 0x03
SecurityHeaderTypeIntegrityProtectedAndCipheredWithNew5gNasSecurityContext uint8 = 0x04
)
// NewMessage TODO:desc
func NewMessage() *Message {
Message := &Message{}
return Message
}
// NewGmmMessage TODO:desc
func NewGmmMessage() *GmmMessage {
GmmMessage := &GmmMessage{}
return GmmMessage
}
// NewGmmMessage TODO:desc
func NewGsmMessage() *GsmMessage {
GsmMessage := &GsmMessage{}
return GsmMessage
}
// GmmHeader Octet1 protocolDiscriminator securityHeaderType
// Octet2 MessageType
type GmmHeader struct {
Octet [3]uint8
}
type GsmHeader struct {
Octet [4]uint8
}
// GetMessageType 9.8
func (a *GmmHeader) GetMessageType() (messageType uint8) {
messageType = a.Octet[2]
return messageType
}
// GetMessageType 9.8
func (a *GmmHeader) SetMessageType(messageType uint8) {
a.Octet[2] = messageType
}
func (a *GmmHeader) GetExtendedProtocolDiscriminator() uint8 {
return a.Octet[0]
}
func (a *GmmHeader) SetExtendedProtocolDiscriminator(epd uint8) {
a.Octet[0] = epd
}
func (a *GsmHeader) GetExtendedProtocolDiscriminator() uint8 {
return a.Octet[0]
}
func (a *GsmHeader) SetExtendedProtocolDiscriminator(epd uint8) {
a.Octet[0] = epd
}
// GetMessageType 9.8
func (a *GsmHeader) GetMessageType() (messageType uint8) {
messageType = a.Octet[3]
return messageType
}
// GetMessageType 9.8
func (a *GsmHeader) SetMessageType(messageType uint8) {
a.Octet[3] = messageType
}
func GetEPD(byteArray []byte) uint8 {
return byteArray[0]
}
func GetSecurityHeaderType(byteArray []byte) uint8 {
return byteArray[1]
}
type GmmMessage struct {
GmmHeader
*nasMessage.AuthenticationRequest // 8.2.1
*nasMessage.AuthenticationResponse // 8.2.2
*nasMessage.AuthenticationResult // 8.2.3
*nasMessage.AuthenticationFailure // 8.2.4
*nasMessage.AuthenticationReject // 8.2.5
*nasMessage.RegistrationRequest // 8.2.6
*nasMessage.RegistrationAccept // 8.2.7
*nasMessage.RegistrationComplete // 8.2.8
*nasMessage.RegistrationReject // 8.2.9
*nasMessage.ULNASTransport // 8.2.10
*nasMessage.DLNASTransport // 8.2.11
*nasMessage.DeregistrationRequestUEOriginatingDeregistration // 8.2.12
*nasMessage.DeregistrationAcceptUEOriginatingDeregistration // 8.2.13
*nasMessage.DeregistrationRequestUETerminatedDeregistration // 8.2.14
*nasMessage.DeregistrationAcceptUETerminatedDeregistration // 8.2.15
*nasMessage.ServiceRequest // 8.2.16
*nasMessage.ServiceAccept // 8.2.17
*nasMessage.ServiceReject // 8.2.18
*nasMessage.ConfigurationUpdateCommand // 8.2.19
*nasMessage.ConfigurationUpdateComplete // 8.2.20
*nasMessage.IdentityRequest // 8.2.21
*nasMessage.IdentityResponse // 8.2.22
*nasMessage.Notification // 8.2.23
*nasMessage.NotificationResponse // 8.2.24
*nasMessage.SecurityModeCommand // 8.2.25
*nasMessage.SecurityModeComplete // 8.2.26
*nasMessage.SecurityModeReject // 8.2.27
*nasMessage.SecurityProtected5GSNASMessage // 8.2.28
*nasMessage.Status5GMM // 8.2.29
}
const (
MsgTypeRegistrationRequest uint8 = 65
MsgTypeRegistrationAccept uint8 = 66
MsgTypeRegistrationComplete uint8 = 67
MsgTypeRegistrationReject uint8 = 68
MsgTypeDeregistrationRequestUEOriginatingDeregistration uint8 = 69
MsgTypeDeregistrationAcceptUEOriginatingDeregistration uint8 = 70
MsgTypeDeregistrationRequestUETerminatedDeregistration uint8 = 71
MsgTypeDeregistrationAcceptUETerminatedDeregistration uint8 = 72
MsgTypeServiceRequest uint8 = 76
MsgTypeServiceReject uint8 = 77
MsgTypeServiceAccept uint8 = 78
MsgTypeConfigurationUpdateCommand uint8 = 84
MsgTypeConfigurationUpdateComplete uint8 = 85
MsgTypeAuthenticationRequest uint8 = 86
MsgTypeAuthenticationResponse uint8 = 87
MsgTypeAuthenticationReject uint8 = 88
MsgTypeAuthenticationFailure uint8 = 89
MsgTypeAuthenticationResult uint8 = 90
MsgTypeIdentityRequest uint8 = 91
MsgTypeIdentityResponse uint8 = 92
MsgTypeSecurityModeCommand uint8 = 93
MsgTypeSecurityModeComplete uint8 = 94
MsgTypeSecurityModeReject uint8 = 95
MsgTypeStatus5GMM uint8 = 100
MsgTypeNotification uint8 = 101
MsgTypeNotificationResponse uint8 = 102
MsgTypeULNASTransport uint8 = 103
MsgTypeDLNASTransport uint8 = 104
)
func (a *Message) PlainNasDecode(byteArray *[]byte) error {
epd := GetEPD(*byteArray)
switch epd {
case nasMessage.Epd5GSMobilityManagementMessage:
return a.GmmMessageDecode(byteArray)
case nasMessage.Epd5GSSessionManagementMessage:
return a.GsmMessageDecode(byteArray)
}
return fmt.Errorf("extended Protocol Discriminator[%d] is not allowed in Nas Message Deocde", epd)
}
func (a *Message) PlainNasEncode() ([]byte, error) {
data := new(bytes.Buffer)
if a.GmmMessage != nil {
err := a.GmmMessageEncode(data)
return data.Bytes(), err
} else if a.GsmMessage != nil {
err := a.GsmMessageEncode(data)
return data.Bytes(), err
}
return nil, fmt.Errorf("Gmm/Gsm Message are both empty in Nas Message Encode")
}
func (a *Message) GmmMessageDecode(byteArray *[]byte) error {
buffer := bytes.NewBuffer(*byteArray)
a.GmmMessage = NewGmmMessage()
binary.Read(buffer, binary.BigEndian, &a.GmmMessage.GmmHeader)
switch a.GmmMessage.GmmHeader.GetMessageType() {
case MsgTypeRegistrationRequest:
a.GmmMessage.RegistrationRequest = nasMessage.NewRegistrationRequest(MsgTypeRegistrationRequest)
a.GmmMessage.DecodeRegistrationRequest(byteArray)
case MsgTypeRegistrationAccept:
a.GmmMessage.RegistrationAccept = nasMessage.NewRegistrationAccept(MsgTypeRegistrationAccept)
a.GmmMessage.DecodeRegistrationAccept(byteArray)
case MsgTypeRegistrationComplete:
a.GmmMessage.RegistrationComplete = nasMessage.NewRegistrationComplete(MsgTypeRegistrationComplete)
a.GmmMessage.DecodeRegistrationComplete(byteArray)
case MsgTypeRegistrationReject:
a.GmmMessage.RegistrationReject = nasMessage.NewRegistrationReject(MsgTypeRegistrationReject)
a.GmmMessage.DecodeRegistrationReject(byteArray)
case MsgTypeDeregistrationRequestUEOriginatingDeregistration:
a.GmmMessage.DeregistrationRequestUEOriginatingDeregistration = nasMessage.NewDeregistrationRequestUEOriginatingDeregistration(MsgTypeDeregistrationRequestUEOriginatingDeregistration)
a.GmmMessage.DecodeDeregistrationRequestUEOriginatingDeregistration(byteArray)
case MsgTypeDeregistrationAcceptUEOriginatingDeregistration:
a.GmmMessage.DeregistrationAcceptUEOriginatingDeregistration = nasMessage.NewDeregistrationAcceptUEOriginatingDeregistration(MsgTypeDeregistrationAcceptUEOriginatingDeregistration)
a.GmmMessage.DecodeDeregistrationAcceptUEOriginatingDeregistration(byteArray)
case MsgTypeDeregistrationRequestUETerminatedDeregistration:
a.GmmMessage.DeregistrationRequestUETerminatedDeregistration = nasMessage.NewDeregistrationRequestUETerminatedDeregistration(MsgTypeDeregistrationRequestUETerminatedDeregistration)
a.GmmMessage.DecodeDeregistrationRequestUETerminatedDeregistration(byteArray)
case MsgTypeDeregistrationAcceptUETerminatedDeregistration:
a.GmmMessage.DeregistrationAcceptUETerminatedDeregistration = nasMessage.NewDeregistrationAcceptUETerminatedDeregistration(MsgTypeDeregistrationAcceptUETerminatedDeregistration)
a.GmmMessage.DecodeDeregistrationAcceptUETerminatedDeregistration(byteArray)
case MsgTypeServiceRequest:
a.GmmMessage.ServiceRequest = nasMessage.NewServiceRequest(MsgTypeServiceRequest)
a.GmmMessage.DecodeServiceRequest(byteArray)
case MsgTypeServiceReject:
a.GmmMessage.ServiceReject = nasMessage.NewServiceReject(MsgTypeServiceReject)
a.GmmMessage.DecodeServiceReject(byteArray)
case MsgTypeServiceAccept:
a.GmmMessage.ServiceAccept = nasMessage.NewServiceAccept(MsgTypeServiceAccept)
a.GmmMessage.DecodeServiceAccept(byteArray)
case MsgTypeConfigurationUpdateCommand:
a.GmmMessage.ConfigurationUpdateCommand = nasMessage.NewConfigurationUpdateCommand(MsgTypeConfigurationUpdateCommand)
a.GmmMessage.DecodeConfigurationUpdateCommand(byteArray)
case MsgTypeConfigurationUpdateComplete:
a.GmmMessage.ConfigurationUpdateComplete = nasMessage.NewConfigurationUpdateComplete(MsgTypeConfigurationUpdateComplete)
a.GmmMessage.DecodeConfigurationUpdateComplete(byteArray)
case MsgTypeAuthenticationRequest:
a.GmmMessage.AuthenticationRequest = nasMessage.NewAuthenticationRequest(MsgTypeAuthenticationRequest)
a.GmmMessage.DecodeAuthenticationRequest(byteArray)
case MsgTypeAuthenticationResponse:
a.GmmMessage.AuthenticationResponse = nasMessage.NewAuthenticationResponse(MsgTypeAuthenticationResponse)
a.GmmMessage.DecodeAuthenticationResponse(byteArray)
case MsgTypeAuthenticationReject:
a.GmmMessage.AuthenticationReject = nasMessage.NewAuthenticationReject(MsgTypeAuthenticationReject)
a.GmmMessage.DecodeAuthenticationReject(byteArray)
case MsgTypeAuthenticationFailure:
a.GmmMessage.AuthenticationFailure = nasMessage.NewAuthenticationFailure(MsgTypeAuthenticationFailure)
a.GmmMessage.DecodeAuthenticationFailure(byteArray)
case MsgTypeAuthenticationResult:
a.GmmMessage.AuthenticationResult = nasMessage.NewAuthenticationResult(MsgTypeAuthenticationResult)
a.GmmMessage.DecodeAuthenticationResult(byteArray)
case MsgTypeIdentityRequest:
a.GmmMessage.IdentityRequest = nasMessage.NewIdentityRequest(MsgTypeIdentityRequest)
a.GmmMessage.DecodeIdentityRequest(byteArray)
case MsgTypeIdentityResponse:
a.GmmMessage.IdentityResponse = nasMessage.NewIdentityResponse(MsgTypeIdentityResponse)
a.GmmMessage.DecodeIdentityResponse(byteArray)
case MsgTypeSecurityModeCommand:
a.GmmMessage.SecurityModeCommand = nasMessage.NewSecurityModeCommand(MsgTypeSecurityModeCommand)
a.GmmMessage.DecodeSecurityModeCommand(byteArray)
case MsgTypeSecurityModeComplete:
a.GmmMessage.SecurityModeComplete = nasMessage.NewSecurityModeComplete(MsgTypeSecurityModeComplete)
a.GmmMessage.DecodeSecurityModeComplete(byteArray)
case MsgTypeSecurityModeReject:
a.GmmMessage.SecurityModeReject = nasMessage.NewSecurityModeReject(MsgTypeSecurityModeReject)
a.GmmMessage.DecodeSecurityModeReject(byteArray)
case MsgTypeStatus5GMM:
a.GmmMessage.Status5GMM = nasMessage.NewStatus5GMM(MsgTypeStatus5GMM)
a.GmmMessage.DecodeStatus5GMM(byteArray)
case MsgTypeNotification:
a.GmmMessage.Notification = nasMessage.NewNotification(MsgTypeNotification)
a.GmmMessage.DecodeNotification(byteArray)
case MsgTypeNotificationResponse:
a.GmmMessage.NotificationResponse = nasMessage.NewNotificationResponse(MsgTypeNotificationResponse)
a.GmmMessage.DecodeNotificationResponse(byteArray)
case MsgTypeULNASTransport:
a.GmmMessage.ULNASTransport = nasMessage.NewULNASTransport(MsgTypeULNASTransport)
a.GmmMessage.DecodeULNASTransport(byteArray)
case MsgTypeDLNASTransport:
a.GmmMessage.DLNASTransport = nasMessage.NewDLNASTransport(MsgTypeDLNASTransport)
a.GmmMessage.DecodeDLNASTransport(byteArray)
default:
return fmt.Errorf("NAS decode Fail: MsgType[%d] doesn't exist in GMM Message", a.GmmMessage.GmmHeader.GetMessageType())
}
return nil
}
func (a *Message) GmmMessageEncode(buffer *bytes.Buffer) error {
switch a.GmmMessage.GmmHeader.GetMessageType() {
case MsgTypeRegistrationRequest:
a.GmmMessage.EncodeRegistrationRequest(buffer)
case MsgTypeRegistrationAccept:
a.GmmMessage.EncodeRegistrationAccept(buffer)
case MsgTypeRegistrationComplete:
a.GmmMessage.EncodeRegistrationComplete(buffer)
case MsgTypeRegistrationReject:
a.GmmMessage.EncodeRegistrationReject(buffer)
case MsgTypeDeregistrationRequestUEOriginatingDeregistration:
a.GmmMessage.EncodeDeregistrationRequestUEOriginatingDeregistration(buffer)
case MsgTypeDeregistrationAcceptUEOriginatingDeregistration:
a.GmmMessage.EncodeDeregistrationAcceptUEOriginatingDeregistration(buffer)
case MsgTypeDeregistrationRequestUETerminatedDeregistration:
a.GmmMessage.EncodeDeregistrationRequestUETerminatedDeregistration(buffer)
case MsgTypeDeregistrationAcceptUETerminatedDeregistration:
a.GmmMessage.EncodeDeregistrationAcceptUETerminatedDeregistration(buffer)
case MsgTypeServiceRequest:
a.GmmMessage.EncodeServiceRequest(buffer)
case MsgTypeServiceReject:
a.GmmMessage.EncodeServiceReject(buffer)
case MsgTypeServiceAccept:
a.GmmMessage.EncodeServiceAccept(buffer)
case MsgTypeConfigurationUpdateCommand:
a.GmmMessage.EncodeConfigurationUpdateCommand(buffer)
case MsgTypeConfigurationUpdateComplete:
a.GmmMessage.EncodeConfigurationUpdateComplete(buffer)
case MsgTypeAuthenticationRequest:
a.GmmMessage.EncodeAuthenticationRequest(buffer)
case MsgTypeAuthenticationResponse:
a.GmmMessage.EncodeAuthenticationResponse(buffer)
case MsgTypeAuthenticationReject:
a.GmmMessage.EncodeAuthenticationReject(buffer)
case MsgTypeAuthenticationFailure:
a.GmmMessage.EncodeAuthenticationFailure(buffer)
case MsgTypeAuthenticationResult:
a.GmmMessage.EncodeAuthenticationResult(buffer)
case MsgTypeIdentityRequest:
a.GmmMessage.EncodeIdentityRequest(buffer)
case MsgTypeIdentityResponse:
a.GmmMessage.EncodeIdentityResponse(buffer)
case MsgTypeSecurityModeCommand:
a.GmmMessage.EncodeSecurityModeCommand(buffer)
case MsgTypeSecurityModeComplete:
a.GmmMessage.EncodeSecurityModeComplete(buffer)
case MsgTypeSecurityModeReject:
a.GmmMessage.EncodeSecurityModeReject(buffer)
case MsgTypeStatus5GMM:
a.GmmMessage.EncodeStatus5GMM(buffer)
case MsgTypeNotification:
a.GmmMessage.EncodeNotification(buffer)
case MsgTypeNotificationResponse:
a.GmmMessage.EncodeNotificationResponse(buffer)
case MsgTypeULNASTransport:
a.GmmMessage.EncodeULNASTransport(buffer)
case MsgTypeDLNASTransport:
a.GmmMessage.EncodeDLNASTransport(buffer)
default:
return fmt.Errorf("NAS Encode Fail: MsgType[%d] doesn't exist in GMM Message", a.GmmMessage.GmmHeader.GetMessageType())
}
return nil
}
type GsmMessage struct {
GsmHeader
*nasMessage.PDUSessionEstablishmentRequest // 8.3.1
*nasMessage.PDUSessionEstablishmentAccept // 8.3.2
*nasMessage.PDUSessionEstablishmentReject // 8.3.3
*nasMessage.PDUSessionAuthenticationCommand // 8.3.4
*nasMessage.PDUSessionAuthenticationComplete // 8.3.5
*nasMessage.PDUSessionAuthenticationResult // 8.3.6
*nasMessage.PDUSessionModificationRequest // 8.3.7
*nasMessage.PDUSessionModificationReject // 8.3.8
*nasMessage.PDUSessionModificationCommand // 8.3.9
*nasMessage.PDUSessionModificationComplete // 8.3.10
*nasMessage.PDUSessionModificationCommandReject // 8.3.11
*nasMessage.PDUSessionReleaseRequest // 8.3.12
*nasMessage.PDUSessionReleaseReject // 8.3.13
*nasMessage.PDUSessionReleaseCommand // 8.3.14
*nasMessage.PDUSessionReleaseComplete // 8.3.15
*nasMessage.Status5GSM // 8.3.16
}
const (
MsgTypePDUSessionEstablishmentRequest uint8 = 193
MsgTypePDUSessionEstablishmentAccept uint8 = 194
MsgTypePDUSessionEstablishmentReject uint8 = 195
MsgTypePDUSessionAuthenticationCommand uint8 = 197
MsgTypePDUSessionAuthenticationComplete uint8 = 198
MsgTypePDUSessionAuthenticationResult uint8 = 199
MsgTypePDUSessionModificationRequest uint8 = 201
MsgTypePDUSessionModificationReject uint8 = 202
MsgTypePDUSessionModificationCommand uint8 = 203
MsgTypePDUSessionModificationComplete uint8 = 204
MsgTypePDUSessionModificationCommandReject uint8 = 205
MsgTypePDUSessionReleaseRequest uint8 = 209
MsgTypePDUSessionReleaseReject uint8 = 210
MsgTypePDUSessionReleaseCommand uint8 = 211
MsgTypePDUSessionReleaseComplete uint8 = 212
MsgTypeStatus5GSM uint8 = 214
)
func (a *Message) GsmMessageDecode(byteArray *[]byte) error {
buffer := bytes.NewBuffer(*byteArray)
a.GsmMessage = NewGsmMessage()
binary.Read(buffer, binary.BigEndian, &a.GsmMessage.GsmHeader)
switch a.GsmMessage.GsmHeader.GetMessageType() {
case MsgTypePDUSessionEstablishmentRequest:
a.GsmMessage.PDUSessionEstablishmentRequest = nasMessage.NewPDUSessionEstablishmentRequest(MsgTypePDUSessionEstablishmentRequest)
a.GsmMessage.DecodePDUSessionEstablishmentRequest(byteArray)
case MsgTypePDUSessionEstablishmentAccept:
a.GsmMessage.PDUSessionEstablishmentAccept = nasMessage.NewPDUSessionEstablishmentAccept(MsgTypePDUSessionEstablishmentAccept)
a.GsmMessage.DecodePDUSessionEstablishmentAccept(byteArray)
case MsgTypePDUSessionEstablishmentReject:
a.GsmMessage.PDUSessionEstablishmentReject = nasMessage.NewPDUSessionEstablishmentReject(MsgTypePDUSessionEstablishmentReject)
a.GsmMessage.DecodePDUSessionEstablishmentReject(byteArray)
case MsgTypePDUSessionAuthenticationCommand:
a.GsmMessage.PDUSessionAuthenticationCommand = nasMessage.NewPDUSessionAuthenticationCommand(MsgTypePDUSessionAuthenticationCommand)
a.GsmMessage.DecodePDUSessionAuthenticationCommand(byteArray)
case MsgTypePDUSessionAuthenticationComplete:
a.GsmMessage.PDUSessionAuthenticationComplete = nasMessage.NewPDUSessionAuthenticationComplete(MsgTypePDUSessionAuthenticationComplete)
a.GsmMessage.DecodePDUSessionAuthenticationComplete(byteArray)
case MsgTypePDUSessionAuthenticationResult:
a.GsmMessage.PDUSessionAuthenticationResult = nasMessage.NewPDUSessionAuthenticationResult(MsgTypePDUSessionAuthenticationResult)
a.GsmMessage.DecodePDUSessionAuthenticationResult(byteArray)
case MsgTypePDUSessionModificationRequest:
a.GsmMessage.PDUSessionModificationRequest = nasMessage.NewPDUSessionModificationRequest(MsgTypePDUSessionModificationRequest)
a.GsmMessage.DecodePDUSessionModificationRequest(byteArray)
case MsgTypePDUSessionModificationReject:
a.GsmMessage.PDUSessionModificationReject = nasMessage.NewPDUSessionModificationReject(MsgTypePDUSessionModificationReject)
a.GsmMessage.DecodePDUSessionModificationReject(byteArray)
case MsgTypePDUSessionModificationCommand:
a.GsmMessage.PDUSessionModificationCommand = nasMessage.NewPDUSessionModificationCommand(MsgTypePDUSessionModificationCommand)
a.GsmMessage.DecodePDUSessionModificationCommand(byteArray)
case MsgTypePDUSessionModificationComplete:
a.GsmMessage.PDUSessionModificationComplete = nasMessage.NewPDUSessionModificationComplete(MsgTypePDUSessionModificationComplete)
a.GsmMessage.DecodePDUSessionModificationComplete(byteArray)
case MsgTypePDUSessionModificationCommandReject:
a.GsmMessage.PDUSessionModificationCommandReject = nasMessage.NewPDUSessionModificationCommandReject(MsgTypePDUSessionModificationCommandReject)
a.GsmMessage.DecodePDUSessionModificationCommandReject(byteArray)
case MsgTypePDUSessionReleaseRequest:
a.GsmMessage.PDUSessionReleaseRequest = nasMessage.NewPDUSessionReleaseRequest(MsgTypePDUSessionReleaseRequest)
a.GsmMessage.DecodePDUSessionReleaseRequest(byteArray)
case MsgTypePDUSessionReleaseReject:
a.GsmMessage.PDUSessionReleaseReject = nasMessage.NewPDUSessionReleaseReject(MsgTypePDUSessionReleaseReject)
a.GsmMessage.DecodePDUSessionReleaseReject(byteArray)
case MsgTypePDUSessionReleaseCommand:
a.GsmMessage.PDUSessionReleaseCommand = nasMessage.NewPDUSessionReleaseCommand(MsgTypePDUSessionReleaseCommand)
a.GsmMessage.DecodePDUSessionReleaseCommand(byteArray)
case MsgTypePDUSessionReleaseComplete:
a.GsmMessage.PDUSessionReleaseComplete = nasMessage.NewPDUSessionReleaseComplete(MsgTypePDUSessionReleaseComplete)
a.GsmMessage.DecodePDUSessionReleaseComplete(byteArray)
case MsgTypeStatus5GSM:
a.GsmMessage.Status5GSM = nasMessage.NewStatus5GSM(MsgTypeStatus5GSM)
a.GsmMessage.DecodeStatus5GSM(byteArray)
default:
return fmt.Errorf("NAS Decode Fail: MsgType[%d] doesn't exist in GSM Message", a.GsmMessage.GsmHeader.GetMessageType())
}
return nil
}
func (a *Message) GsmMessageEncode(buffer *bytes.Buffer) error {
switch a.GsmMessage.GsmHeader.GetMessageType() {
case MsgTypePDUSessionEstablishmentRequest:
a.GsmMessage.EncodePDUSessionEstablishmentRequest(buffer)
case MsgTypePDUSessionEstablishmentAccept:
a.GsmMessage.EncodePDUSessionEstablishmentAccept(buffer)
case MsgTypePDUSessionEstablishmentReject:
a.GsmMessage.EncodePDUSessionEstablishmentReject(buffer)
case MsgTypePDUSessionAuthenticationCommand:
a.GsmMessage.EncodePDUSessionAuthenticationCommand(buffer)
case MsgTypePDUSessionAuthenticationComplete:
a.GsmMessage.EncodePDUSessionAuthenticationComplete(buffer)
case MsgTypePDUSessionAuthenticationResult:
a.GsmMessage.EncodePDUSessionAuthenticationResult(buffer)
case MsgTypePDUSessionModificationRequest:
a.GsmMessage.EncodePDUSessionModificationRequest(buffer)
case MsgTypePDUSessionModificationReject:
a.GsmMessage.EncodePDUSessionModificationReject(buffer)
case MsgTypePDUSessionModificationCommand:
a.GsmMessage.EncodePDUSessionModificationCommand(buffer)
case MsgTypePDUSessionModificationComplete:
a.GsmMessage.EncodePDUSessionModificationComplete(buffer)
case MsgTypePDUSessionModificationCommandReject:
a.GsmMessage.EncodePDUSessionModificationCommandReject(buffer)
case MsgTypePDUSessionReleaseRequest:
a.GsmMessage.EncodePDUSessionReleaseRequest(buffer)
case MsgTypePDUSessionReleaseReject:
a.GsmMessage.EncodePDUSessionReleaseReject(buffer)
case MsgTypePDUSessionReleaseCommand:
a.GsmMessage.EncodePDUSessionReleaseCommand(buffer)
case MsgTypePDUSessionReleaseComplete:
a.GsmMessage.EncodePDUSessionReleaseComplete(buffer)
case MsgTypeStatus5GSM:
a.GsmMessage.EncodeStatus5GSM(buffer)
default:
return fmt.Errorf("NAS Encode Fail: MsgType[%d] doesn't exist in GSM Message", a.GsmMessage.GsmHeader.GetMessageType())
}
return nil
}