decode

Documentation

Index

• Constants
• Variables
• type InformationElementIdentifier
• type SGsMessageType

Constants

const (
	LengthIEI             = 1
	LengthLengthIndicator = 1
	LengthRejectCause     = 3
)

length in number of bytes

const (
	IELengthMessageType                     = 1
	IELengthTMSI                            = 6
	IELengthIMSIMin                         = 6
	IELengthIMSIMax                         = 10
	IELengthMMEName                         = 57
	IELengthVLRNameMin                      = 3
	IELengthMMInformationMin                = 3
	IELengthLocationAreaIdentifier          = 7
	IELengthSGsCause                        = 3
	IELengthCLIMin                          = 3
	IELengthCLIMax                          = 14
	IELengthGlobalCNId                      = 7
	IELengthLCSIndicator                    = 3
	IELengthLCSClientIdentityMin            = 3
	IELengthSSCode                          = 3
	IELengthChannelNeeded                   = 3
	IELengthEMLPPPriority                   = 3
	IELengthServiceIndicator                = 3
	IELengthNASMessageContainerMin          = 4
	IELengthNASMessageContainerMax          = 253
	IELengthErroneousMessageMin             = 3
	IELengthIMSIDetachFromEPSServiceType    = 3
	IELengthIMSIDetachFromNonEPSServiceType = 3
	IELengthEPSLocationUpdateType           = 3
	IELengthTMSIStatus                      = 3
	IELengthIMEISV                          = 10
	IELengthTAI                             = 7
	IELengthEUTRANCellGlobalIdentity        = 9
	IELengthUETimeZone                      = 3
	IELengthMobileStationClassmark2         = 5
	IELengthUEEMMMode                       = 3
	IELengthMobileIdentityMin               = 6
	IELengthMobileIdentityMax               = 10
	IELengthRejectCause                     = 3
)

length of information element in number of bytes

const (
	MobileIdentityTypeMask      = 0x07
	MobileIdentityIMSI          = 0x01
	MobileIdentityTMSI          = 0x04
	MobileIdentityTMSIFirstByte = 0xF4
)

special encoding for fields

Variables

var IEINamesByCode = map[InformationElementIdentifier]string{
	IEIIMSI:                            "IMSI",
	IEIVLRName:                         "VLRName",
	IEITMSI:                            "TMSI",
	IEILocationAreaIdentifier:          "LocationAreaIdentifier",
	IEIChannelNeeded:                   "ChannelNeeded",
	IEIeMLPPPriority:                   "eMLPPPriority",
	IEITMSIStatus:                      "TMSIStatus",
	IEISGsCause:                        "SGsCause",
	IEIMMEName:                         "MMEName",
	IEIEPSLocationUpdateType:           "LocationUpdateType",
	IEIGlobalCNId:                      "GlobalCNId",
	IEIMobileIdentity:                  "MobileIdentity",
	IEIRejectCause:                     "RejectCause",
	IEIIMSIDetachFromEPSServiceType:    "IMSIDetachFromEPSServiceType",
	IEIIMSIDetachFromNonEPSServiceType: "IMSIDetachFromNonEPSServiceType",
	IEIIMEISV:                          "IMEISV",
	IEINASMessageContainer:             "NASMessageContainer",
	IEIMMInformation:                   "MMInformation",
	IEIErroneousMessage:                "ErroneousMessage",
	IEICLI:                             "CLI",
	IEILCSClientIdentity:               "LCSClientIdentity",
	IEILCSIndicator:                    "IEILCSIndicator",
	IEISSCode:                          "SSCode",
	IEIServiceIndicator:                "ServiceIndicator",
	IEIUETimeZone:                      "UETimeZone",
	IEIMobileStationClassmark2:         "MobileStationClassmark2",
	IEITAI:                             "TAI",
	IEIEUTRANCellGlobalIdentity:        "EUTRANCellGlobalIdentity",
	IEIUEEMMMode:                       "UEEMMMode",
}

var MsgTypeNameByCode = map[SGsMessageType]string{
	SGsAPLocationUpdateAccept: "SGsAPLocationUpdateAccept",
	SGsAPLocationUpdateReject: "SGsAPLocationUpdateReject",
	SGsAPIMSIDetachAck:        "SGsAPIMSIDetachAck",
	SGsAPPagingRequest:        "SGsAPPagingRequest",
	SGsAPEPSDetachAck:         "SGsAPEPSDetachAck",
	SGsAPAlertRequest:         "SGsAPAlertRequest",
	SGsAPDownlinkUnitdata:     "SGsAPDownlinkUnitdata",
	SGsAPMMInformationRequest: "SGsAPMMInformationRequest",
	SGsAPReleaseRequest:       "SGsAPReleaseRequest",
	SGsAPServiceAbortRequest:  "SGsAPServiceAbortRequest",
	SGsAPStatus:               "SGsAPStatus",
	SGsAPResetAck:             "SGsAPResetAck",
	SGsAPResetIndication:      "SGsAPResetIndication",
}

Types

type InformationElementIdentifier

type InformationElementIdentifier byte

InformationElementIdentifier is a byte for identifying an element in a message

const (
	IEIIMSI                            InformationElementIdentifier = 0x01
	IEIVLRName                         InformationElementIdentifier = 0x02
	IEITMSI                            InformationElementIdentifier = 0x03
	IEILocationAreaIdentifier          InformationElementIdentifier = 0x04
	IEIChannelNeeded                   InformationElementIdentifier = 0x05
	IEIeMLPPPriority                   InformationElementIdentifier = 0x06
	IEITMSIStatus                      InformationElementIdentifier = 0x07
	IEISGsCause                        InformationElementIdentifier = 0x08
	IEIMMEName                         InformationElementIdentifier = 0x09
	IEIEPSLocationUpdateType           InformationElementIdentifier = 0x0A
	IEIGlobalCNId                      InformationElementIdentifier = 0x0B
	IEIMobileIdentity                  InformationElementIdentifier = 0x0E
	IEIRejectCause                     InformationElementIdentifier = 0x0F
	IEIIMSIDetachFromEPSServiceType    InformationElementIdentifier = 0x10
	IEIIMSIDetachFromNonEPSServiceType InformationElementIdentifier = 0x11
	IEIIMEISV                          InformationElementIdentifier = 0x15
	IEINASMessageContainer             InformationElementIdentifier = 0x16
	IEIMMInformation                   InformationElementIdentifier = 0x17
	IEIErroneousMessage                InformationElementIdentifier = 0x1B
	IEICLI                             InformationElementIdentifier = 0x1C
	IEILCSClientIdentity               InformationElementIdentifier = 0x1D
	IEILCSIndicator                    InformationElementIdentifier = 0x1E
	IEISSCode                          InformationElementIdentifier = 0x1F
	IEIServiceIndicator                InformationElementIdentifier = 0x20
	IEIUETimeZone                      InformationElementIdentifier = 0x21
	IEIMobileStationClassmark2         InformationElementIdentifier = 0x22
	IEITAI                             InformationElementIdentifier = 0x23
	IEIEUTRANCellGlobalIdentity        InformationElementIdentifier = 0x24
	IEIUEEMMMode                       InformationElementIdentifier = 0x25
)

Information Element Identifier mapping

type SGsMessageType

type SGsMessageType byte

SGsMessageType is the first byte in the SGs message for identifying the type of a message

const (
	SGsAPPagingRequest            SGsMessageType = 0x01
	SGsAPPagingReject             SGsMessageType = 0x02
	SGsAPServiceRequest           SGsMessageType = 0x06
	SGsAPDownlinkUnitdata         SGsMessageType = 0x07
	SGsAPUplinkUnitdata           SGsMessageType = 0x08
	SGsAPLocationUpdateRequest    SGsMessageType = 0x09
	SGsAPLocationUpdateAccept     SGsMessageType = 0x0A
	SGsAPLocationUpdateReject     SGsMessageType = 0x0B
	SGsAPTMSIReallocationComplete SGsMessageType = 0x0C
	SGsAPAlertRequest             SGsMessageType = 0x0D
	SGsAPAlertAck                 SGsMessageType = 0x0E
	SGsAPAlertReject              SGsMessageType = 0x0F
	SGsAPUEActivityIndication     SGsMessageType = 0x10
	SGsAPEPSDetachIndication      SGsMessageType = 0x11
	SGsAPEPSDetachAck             SGsMessageType = 0x12
	SGsAPIMSIDetachIndication     SGsMessageType = 0x13
	SGsAPIMSIDetachAck            SGsMessageType = 0x14
	SGsAPResetIndication          SGsMessageType = 0x15
	SGsAPResetAck                 SGsMessageType = 0x16
	SGsAPServiceAbortRequest      SGsMessageType = 0x17
	SGsAPMMInformationRequest     SGsMessageType = 0x1A
	SGsAPReleaseRequest           SGsMessageType = 0x1B
	SGsAPStatus                   SGsMessageType = 0x1D
	SGsAPUEUnreachable            SGsMessageType = 0x1F
)

Message type mapping