SIGTRAN MTP2 User Peer-to-Peer Adaptation Layer. More...

#include <yatesig.h>

Inheritance diagram for SS7M2PA:

Public Types
enum	m2paState { Alignment = 1 , ProvingNormal = 2 , ProvingEmergency = 3 , Ready = 4 , ProcessorOutage = 5 , ProcessorRecovered = 6 , Busy = 7 , BusyEnded = 8 , OutOfService = 9 }

enum	msgType { UserData = 1 , LinkStatus = 2 }

enum	sctpState { Idle , Associating , Established }

enum	M2PAOperations { Pause = SS7Layer2::Pause , Resume = SS7Layer2::Resume , Align = SS7Layer2::Align , Status = SS7Layer2::Status , TransRestart = 0x500 }

Public Types inherited from SS7Layer2
enum	LinkStatus { OutOfAlignment = 0 , NormalAlignment = 1 , EmergencyAlignment = 2 , OutOfService = 3 , ProcessorOutage = 4 , Busy = 5 , O = OutOfAlignment , N = NormalAlignment , E = EmergencyAlignment , OS = OutOfService , PO = ProcessorOutage , B = Busy }

enum	Operation { Pause = 0x100 , Resume = 0x200 , Align = 0x300 , Status = 0x400 }

enum	Inhibitions { Unchecked = 0x01 , Inactive = 0x02 , Local = 0x04 , Remote = 0x08 }

Public Types inherited from SIGTRAN
enum	MsgClass { MGMT = 0 , TRAN = 1 , SSNM = 2 , ASPSM = 3 , ASPTM = 4 , QPTM = 5 , MAUP = 6 , CLMSG = 7 , COMSG = 8 , RKM = 9 , IIM = 10 , M2PA = 11 }

enum	MsgMGMT { MgmtERR = 0 , MgmtNTFY = 1 }

enum	MsgSSNM { SsnmDUNA = 1 , SsnmDAVA = 2 , SsnmDAUD = 3 , SsnmSCON = 4 , SsnmDUPU = 5 , SsnmDRST = 6 }

enum	MsgASPSM { AspsmUP = 1 , AspsmDOWN = 2 , AspsmBEAT = 3 , AspsmUP_ACK = 4 , AspsmDOWN_ACK = 5 , AspsmBEAT_ACK = 6 }

enum	MsgASPTM { AsptmACTIVE = 1 , AsptmINACTIVE = 2 , AsptmACTIVE_ACK = 3 , AsptmINACTIVE_ACK = 4 }

enum	MsgRKM { RkmREG_REQ = 1 , RkmREG_RSP = 2 , RkmDEREG_REQ = 3 , RkmDEREG_RSP = 4 }

enum	MsgIIM { IimREG_REQ = 1 , IimREG_RSP = 2 , IimDEREG_REQ = 3 , IimDEREG_RSP = 4 }

Public Member Functions
	SS7M2PA (const NamedList &params)

	~SS7M2PA ()

virtual bool	initialize (const NamedList *config)

virtual bool	control (NamedList &params)

virtual bool	control (M2PAOperations oper, NamedList *params=0)

virtual bool	control (SS7Layer2::Operation oper, NamedList *params=0)

virtual unsigned int	status () const

virtual bool	transmitMSU (const SS7MSU &msu)

virtual void	notifyLayer (SignallingInterface::Notification status)

virtual void	recoverMSU (int sequence)

bool	decodeSeq (const DataBlock &data, u_int8_t msgType)

void	abortAlignment (const char *info=0)

void	transmitLS (int streamId=0)

void	setHeader (DataBlock &data)

bool	processLinkStatus (DataBlock &data, int streamId)

bool	processSLinkStatus (DataBlock &data, int streamId)

void	sendAck ()

bool	removeFrame (u_int32_t bsn)

bool	nextBsn (u_int32_t bsn) const

Public Member Functions inherited from SS7Layer2
virtual const char *	statusName (unsigned int status, bool brief) const

const char *	statusName (bool brief=false) const

unsigned int	upTime () const

void	attach (SS7L2User *l2user)

SS7L2User *	user () const

int	sls () const

void	sls (int linkSel)

int	inhibited () const

bool	inhibited (int flags) const

virtual unsigned int	congestion ()

virtual int	getSequence ()

Public Member Functions inherited from SignallingComponent
virtual	~SignallingComponent ()

virtual const String &	toString () const

virtual NamedList *	controlCreate (const char *oper=0)

virtual bool	controlExecute (NamedList *params)

virtual void	engine (SignallingEngine *eng)

SignallingEngine *	engine () const

int	debugLevel (int level)

const String &	componentType () const

Public Member Functions inherited from RefObject
	RefObject ()

virtual	~RefObject ()

virtual void *	getObject (const String &name) const

virtual bool	alive () const

bool	ref ()

bool	deref ()

int	refcount () const

virtual void	destruct ()

Public Member Functions inherited from GenObject
	GenObject ()

virtual	~GenObject ()

virtual const String &	traceId () const

NamedCounter *	getObjCounter () const

NamedCounter *	setObjCounter (NamedCounter *counter)

Public Member Functions inherited from DebugEnabler
	DebugEnabler (int level=TelEngine::debugLevel(), bool enabled=true)

int	debugLevel () const

int	debugLevel (int level)

bool	debugEnabled () const

void	debugEnabled (bool enable)

const char *	debugName () const

bool	debugAt (int level) const

bool	debugChained () const

void	debugChain (const DebugEnabler *chain=0)

void	debugCopy (const DebugEnabler *original=0)

Public Member Functions inherited from SIGTRAN
	SIGTRAN (u_int32_t payload=0, u_int16_t port=0)

virtual	~SIGTRAN ()

virtual void	attach (SIGTransport *trans)

SIGTransport *	transport () const

u_int32_t	payload () const

u_int16_t	defPort () const

bool	connected (int streamId=0) const

bool	transmitMSG (unsigned char msgVersion, unsigned char msgClass, unsigned char msgType, const DataBlock &msg, int streamId=0) const

bool	transmitMSG (unsigned char msgClass, unsigned char msgType, const DataBlock &msg, int streamId=0) const

bool	restart (bool force)

bool	getSocketParams (const String &params, NamedList &result)

virtual bool	transportNotify (SIGTransport *newTransport, const SocketAddr &addr)

bool	hasTransportThread ()

void	stopTransportThread ()

Static Public Member Functions
static u_int32_t	increment (u_int32_t &nr)

static u_int32_t	getNext (u_int32_t nr)

Static Public Member Functions inherited from SignallingComponent
static bool	resolveConfig (const String &cmpName, NamedList &params, const NamedList *config)

Static Public Member Functions inherited from RefObject
static bool	alive (const RefObject *obj)

static bool	efficientIncDec ()

Static Public Member Functions inherited from GenObject
static void *	getObject (const String &name, const GenObject *obj)

static bool	getObjCounting ()

static void	setObjCounting (bool enable)

static NamedCounter *	getObjCounter (const String &name, bool create=true)

static ObjList &	getObjCounters ()

Static Public Member Functions inherited from SIGTRAN
static const TokenDict *	classNames ()

static const char *	typeName (unsigned char msgClass, unsigned char msgType, const char *defValue=0)

Protected Member Functions
virtual void	timerTick (const Time &when)

virtual bool	aligned () const

virtual bool	operational () const

virtual bool	processMSG (unsigned char msgVersion, unsigned char msgClass, unsigned char msgType, const DataBlock &msg, int streamId)

void	startAlignment (bool emergency=false)

void	retransData ()

virtual void	destroyed ()

Protected Member Functions inherited from SS7Layer2
	SS7Layer2 ()

bool	receivedMSU (const SS7MSU &msu)

bool	recoveredMSU (const SS7MSU &msu)

void	notify ()

bool	inhibit (int setFlags, int clrFlags=0)

bool	getEmergency (NamedList *params=0, bool emg=false) const

Protected Member Functions inherited from SignallingComponent
	SignallingComponent (const char name=0, const NamedList params=0, const char *type="unknown")

void	insert (SignallingComponent *component)

virtual void	detach ()

void	setName (const char *name)

void	setCompType (const char *type)

unsigned long	tickSleep (unsigned long usec=1000000) const

Protected Member Functions inherited from RefObject
virtual void	zeroRefs ()

bool	resurrect ()

Protected Member Functions inherited from DebugEnabler
void	debugName (const char *name)

Additional Inherited Members
Protected Attributes inherited from SS7Layer2
bool	m_autoEmergency

int	m_lastSeqRx

unsigned int	m_congestion

Detailed Description

SIGTRAN MTP2 User Peer-to-Peer Adaptation Layer.

RFC4165 SS7 Layer 2 implementation over SCTP/IP. M2PA is intended to be used as a symmetrical Peer-to-Peer replacement of a hardware based SS7 data link.

Constructor & Destructor Documentation

◆ SS7M2PA()

SS7M2PA ( const NamedList & params )

Constructor

◆ ~SS7M2PA()

~SS7M2PA ( )

Destructor

Member Function Documentation

◆ abortAlignment()

void abortAlignment ( const char * info = 0 )

Helper method called when an error was detected Change state to OutOfService and notifys upper layer

Parameters

info	Debuging purpose, Information about detected error

◆ aligned()

virtual bool aligned ( ) const

protectedvirtual

Check if the link is aligned. The link may not be operational, the other side may be still proving.

Returns: True if the link is aligned

◆ control() [1/3]

virtual bool control	(	M2PAOperations	oper,
		NamedList *	params = 0 )

virtual

Execute a control operation. Operations can change the link status or can query the aligned status.

Parameters

oper	Operation to execute
params	Optional parameters for the operation

Returns: True if the command completed successfully, for query operations also indicates the data link is aligned and operational

◆ control() [2/3]

virtual bool control ( NamedList & params )

virtual

Query or modify layer's settings or operational parameters

Parameters

params The list of parameters to query or change

Returns: True if the control operation was executed

Reimplemented from SS7Layer2.

Referenced by control().

◆ control() [3/3]

virtual bool control	(	SS7Layer2::Operation	oper,
		NamedList *	params = 0 )

inlinevirtual

Execute a control operation. Operations can change the link status or can query the aligned status.

Parameters

oper	Operation to execute
params	Optional parameters for the operation

Returns: True if the command completed successfully, for query operations also indicates the data link is aligned and operational

Reimplemented from SS7Layer2.

References control().

◆ decodeSeq()

bool decodeSeq	(	const DataBlock &	data,
		u_int8_t	msgType )

Decode sequence numbers from message and process them

Parameters

data	The message
msgType	The message type

Returns: True if sequence numbers ar as we expected to be

◆ destroyed()

virtual void destroyed ( )

protectedvirtual

This method is called to clean up and destroy the object after the reference counter becomes zero

Reimplemented from SignallingComponent.

References status().

◆ getNext()

static u_int32_t getNext ( u_int32_t nr )

inlinestatic

Obtain next sequence number

Parameters

nr	The current sequence number

Returns: The next number in sequence

◆ increment()

static u_int32_t increment ( u_int32_t & nr )

inlinestatic

Increment the given sequence number

Parameters

nr	Reference of the number to increment

Returns: The incremented number

◆ initialize()

virtual bool initialize ( const NamedList * config )

virtual

Configure and initialize M2PA and its transport

Parameters

config Optional configuration parameters override

Returns: True if M2PA and the transport were initialized properly

Reimplemented from SignallingComponent.

◆ nextBsn()

bool nextBsn ( u_int32_t bsn ) const

Check if a sequence number may be a valid next BSN

Parameters

bsn	Backward Sequence Number to check

Returns: True if the provided BSN is in the valid range

◆ notifyLayer()

virtual void notifyLayer ( SignallingInterface::Notification status )

virtual

Method called when the transport status has been changed

Parameters

status Up or down

Reimplemented from SIGTRAN.

References status().

◆ operational()

virtual bool operational ( ) const

protectedvirtual

Check if the link is aligned and operational

Returns: True if the link is operational

Implements SS7Layer2.

◆ processLinkStatus()

bool processLinkStatus	(	DataBlock &	data,
		int	streamId )

Decode and process link status message

Parameters

data	The message
streamId	The stream id witch received the message

Returns: True if the message was procesed

◆ processMSG()

virtual bool processMSG	(	unsigned char	msgVersion,
		unsigned char	msgClass,
		unsigned char	msgType,
		const DataBlock &	msg,
		int	streamId )

protectedvirtual

Process a complete message

Parameters

msgVersion	Version of the protocol
msgClass	Class of the message
msgType	Type of the message, depends on the class
msg	Message data, may be empty
streamId	Identifier of the stream the message was received on

Returns: True if the message was handled

Implements SIGTRAN.

◆ processSLinkStatus()

bool processSLinkStatus	(	DataBlock &	data,
		int	streamId )

Decode and process link status message in more strict manner

Parameters

data	The message
streamId	The stream id witch received the message

Returns: True if the message was procesed

◆ recoverMSU()

virtual void recoverMSU ( int sequence )

virtual

Remove the MSUs waiting in the transmit queue and return them

Parameters

sequence First sequence number to recover, flush earlier packets

Reimplemented from SS7Layer2.

◆ removeFrame()

bool removeFrame ( u_int32_t bsn )

Remove a frame from acknowledgement list

Parameters

bsn	The sequence number of the frame to be removed

Returns: True if the frame was found and removed.

◆ retransData()

void retransData ( )

protected

Retransmit unacknowledged data

◆ sendAck()

void sendAck ( )

Helper method used to acknowledge the last received message when no data are to transmit

◆ setHeader()

void setHeader ( DataBlock & data )

Create M2PA header (sequence numbers)

Parameters

data	The data where the header will be stored

◆ startAlignment()

void startAlignment ( bool emergency = false )

protected

Initiates alignment and proving procedure

Parameters

emergency True if emergency alignment is desired

◆ status()

virtual unsigned int status ( ) const

virtual

Retrieve the current link status indications

Returns: Link status indication bits

Reimplemented from SS7Layer2.

Referenced by destroyed(), and notifyLayer().

◆ timerTick()

virtual void timerTick ( const Time & when )

protectedvirtual

Periodical timer tick used to perform alignment and housekeeping

Parameters

when	Time to use as computing base for events and timeouts

Reimplemented from SS7Layer2.

◆ transmitLS()

void transmitLS ( int streamId = 0 )

Send link status message to inform the peer about ouer curent state

Parameters

streamId The id of the stream who should send the message

◆ transmitMSU()

virtual bool transmitMSU ( const SS7MSU & msu )

virtual

Push a Message Signal Unit down the protocol stack

Parameters

msu	MSU data to transmit

Returns: True if message was successfully queued

Implements SS7Layer2.

The documentation for this class was generated from the following file:

yatesig.h

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ SS7M2PA()

◆ ~SS7M2PA()

Member Function Documentation

◆ abortAlignment()

◆ aligned()

◆ control() [1/3]

◆ control() [2/3]

◆ control() [3/3]

◆ decodeSeq()

◆ destroyed()

◆ getNext()

◆ increment()

◆ initialize()

◆ nextBsn()

◆ notifyLayer()

◆ operational()

◆ processLinkStatus()

◆ processMSG()

◆ processSLinkStatus()

◆ recoverMSU()

◆ removeFrame()

◆ retransData()

◆ sendAck()

◆ setHeader()

◆ startAlignment()

◆ status()

◆ timerTick()

◆ transmitLS()

◆ transmitMSU()