LibIpv6_Rfc2463Icmpv6_Functions.ttcn

/*
 *	@author 	STF 276
 *  @version 	$Id$
 *	@desc		This module specifies common ICMP messages 
 *              interchanges (= operations) for an Ipv6 test component
 *              Functions do not set a test component verdict but instead
 *              use the function return value instead to notify the function
 *              caller about the success of the operation.
 *  
 */
 module LibIpv6_Rfc2463Icmpv6_Functions {

	//LibCommon
	import from LibCommon_BasicTypesAndValues all;
	import from LibCommon_DataStrings all;
	import from LibCommon_VerdictControl { type FncRetCode };
	//LibIpv6
	import from LibIpv6_Interface_TypesAndValues all ;
	import from LibIpv6_Interface_Functions all;
	import from LibIpv6_Interface_Templates all;
	import from LibIpv6_CommonRfcs_TypesAndValues all;
	import from LibIpv6_CommonRfcs_Functions all;
	import from LibIpv6_ModuleParameters all ;
	import from LibIpv6_ExternalFunctions all;
	import from LibIpv6_Rfc2463Icmpv6_Templates all;
	import from LibIpv6_Rfc2463Icmpv6_TypesAndValues all;
	
	/*
	 * @desc  	This sends an ICMPv6 echo request from an IPv6 node to 
	 *          any NUT. Prior it modifies IPv6 packet payload length 
	 *			and ICMPv6 checksum to their correct values using external 
	 *          functions.
	 * @remark  The template passed in must NOT contain any matching expressions!
	 * @param 	p_echoRequest Ipv6 packet value or template with echo request to be sent
	 * @return 	execution status
	*/
	function f_sendEchoRequest (in template EchoRequest p_echoRequest) 
	runs on LibIpv6Node
	return FncRetCode {
		var EchoRequest v_ipPkt;
		v_ipPkt := valueof(p_echoRequest);

		if(f_setExtensionHeaders(	v_ipPkt ) != e_success) {
			log(" **** f_sendEchoRequest: Error when calculating length of extension headers ****");
			return e_error;
		}
		
		//send
		ipPort.send(v_ipPkt);
	
		return e_success;
	
	}//end f_sendEchoRequest

	/*
	 * @desc  	This sends an ICMPv6 echo request from an IPv6 node to any NUT. 
	 *			Prior it modifies IPv6 packet payload length and ICMPv6 checksum 
	 *			to their correct values using external functions
	 * @remark  The template passed in must NOT contain any matching expressions!
	 * @param 	p_echoReply Ipv6 packet value or template with echo reply to be sent
	 * @return 	execution status
	*/
	function f_sendEchoReply (in template EchoReply p_echoReply) 
	runs on LibIpv6Node
	return FncRetCode {
		var EchoReply v_ipPkt;
		v_ipPkt := valueof(p_echoReply);

		if(f_setExtensionHeaders(	v_ipPkt ) != e_success) {
			log(" **** f_sendEchoReply: Error when calculating length of extension headers ****");
			return e_error;
		}

		//send
		ipPort.send(v_ipPkt);
	
		return e_success;
	
	}//end f_sendEchoReply


	/*
	 * @desc 	This sends an ICMPv6 echo request from an IPv6 node to any NUT,
	 *			and waits for any ICMP packet for a fixed amount of time. 
	 * @remark  Time limit is defined by module parameter PX_TAC (see comp type)
	 * @param 	p_hops Number of hops to be used in IPv6 header 
	 * @param 	p_llaAddrTn Local link address of testing node which calls this function 
	 * @param 	p_llaAddrNut Local link address of node under test 
	 * @param 	p_ipPkt ICMPv6 packet which has been received 
	 * @return 	execution status
	*/
	function f_getIpPktAfterEchoReq( 	in  UInt8 			p_hops,
							  		   	in  template Ipv6Address 	p_llaAddrTn,
										in  template Ipv6Address 	p_llaAddrNut,
							  		   	out Ipv6Packet		p_ipPkt)
	runs on LibIpv6Node
	return FncRetCode {

		var FncRetCode v_ret;

		v_ret := f_sendEchoRequest (
			m_echoRequest_noExtHdr_noData_hop (
				p_llaAddrTn,
				p_llaAddrNut,
				p_hops,
				c_defId,
				c_defSeqNo ) );
		if ( v_ret != e_success ) {return v_ret;}
		tc_ac.start;
		alt {
			[]	ipPort.receive(mw_ipPkt) -> value p_ipPkt {
					tc_ac.stop;	
					return e_success;
				}
			[]	tc_ac.timeout{
					return e_timeout;
				}		
		} // end alt
	} // end f_getIcmpAfterEchoReq
	
	/*
	 * @desc 	This sends an ICMPv6 echo request from an IPv6 node to any NUT,
	 *			and waits for a Time Exceeded message for a fixed amount of time. 
	 * @remark  Time limit is defined by module parameter PX_TAC (see comp type)
	 * @param 	p_hops Number of hops to be used in IPv6 header 
	 * @param 	p_llaAddrTn Local link address of testing node which calls this function 
	 * @param 	p_llaAddrNut Local link address of node under test 
	 * @param 	p_llaAddrRut Local link address of router under test 
	 * @return 	execution status
	*/
	function f_getTimeExceededAfterEchoReq( 	in  UInt8 			p_hops,
											in  template Ipv6Address 	p_llaAddrTn,
											in  template Ipv6Address 	p_llaAddrNut,
											in  template Ipv6Address 	p_llaAddrRut)
		runs on LibIpv6Node
		return FncRetCode {

			var FncRetCode v_ret;

			v_ret := f_sendEchoRequest (
				m_echoRequest_noExtHdr_noData_hop (
					p_llaAddrTn,
					p_llaAddrNut,
					p_hops,
					c_defId,
					c_defSeqNo ) );
			if ( v_ret != e_success ) {return v_ret;}
			tc_ac.start;
			alt {
				[]	ipPort.receive(mw_timeExceeded_noExtHdr (	p_llaAddrRut,
																p_llaAddrTn,
																c_icmpCode0 ))  {
						tc_ac.stop;	
						return e_success;
					}
				[]	tc_ac.timeout{
						return e_timeout;
					}		
			} // end alt

		} // end f_getTimeExceedAfterEchoReq

	/*
	 * @desc 	This sends an ICMPv6 echo request from an IPv6 node to any NUT,
	 *			and waits for a Packet Too Big message for a fixed amount of time. 
	 * @remark  Time limit is defined by module parameter PX_TAC (see comp type)
	 * @param 	p_echoRequest Template of the Echo Request to be sent
	 * @param 	p_packetTooBig Template of the Packet Too Big message that is expected
	 * @return 	execution status
	*/
	function f_getPacketTooBigAfterEchoReq (
		template EchoRequest p_echoRequest,
		template PacketTooBig p_packetTooBig )
		runs on LibIpv6Node
		return FncRetCode {

			var FncRetCode v_ret;

			v_ret := f_sendEchoRequest ( p_echoRequest );

			if ( v_ret != e_success ) {return v_ret;}
			tc_ac.start;
			alt {
				[]	ipPort.receive ( p_packetTooBig )  {
						tc_ac.stop;	
						return e_success;
					}
				[]	tc_ac.timeout{
						return e_timeout;
					}		
			} // end alt

		} // end f_getPacketTooBigAfterEchoReq

	/*
	 * @desc 	This sends an ICMPv6 echo request from an IPv6 node to any NUT,
	 *			and waits for a Destination Unreachable message for a fixed amount of time. 
	 * @remark  Time limit is defined by module parameter PX_TAC (see comp type)
	 * @param 	p_echoRequest Template of the Echo Request to be sent
	 * @param 	p_destUnreachable Template of the Packet Too Big message that is expected
	 * @return 	execution status
	*/
	function f_getDestinationUnreachableAfterEchoReq (
		template EchoRequest p_echoRequest,
		template DestinationUnreachable p_destUnreachable )
		runs on LibIpv6Node
		return FncRetCode {

			var FncRetCode v_ret;

			v_ret := f_sendEchoRequest ( p_echoRequest );

			if ( v_ret != e_success ) {return v_ret;}
			tc_ac.start;
			alt {
				[]	ipPort.receive ( p_destUnreachable )  {
						tc_ac.stop;	
						return e_success;
					}
				[]	tc_ac.timeout{
						return e_timeout;
					}		
			} // end alt

		} // end f_getDestinationUnreachableAfterEchoReq


	/*
	 * @desc 	This sends an ICMPv6 echo request from an IPv6 node to any
	 *			NUT, and waits for a echo reply for a fixed amount of time. 
     *          This function can be used to verify that the NUT is 
	 *			up and running.
	 * @remark  Time limit is defined by module parameter PX_TAC (see comp type)
	 * @param 	p_llaAddrTn Local link address of testing node which calls this function 
	 * @param 	p_llaAddrNut Local link address of node under test
	 * @param 	p_identifier Idenitifier to be used in ICMPv6 echo request 
	 * @param 	p_seqNo Sequence number to be used in ICMPv6 echo request 
	 * @param 	p_icmpPkt IPv6 packet which has been received 
	 * @return 	execution status
	*/
	function f_echoProcUp(  in  template Ipv6Address p_llaAddrTn,
							in  template Ipv6Address p_llaAddrNut,
							in  UInt16 		p_identifier,
							in  UInt16 		p_seqNo,
							out EchoReply	p_icmpPkt)
	runs on LibIpv6Node
	return FncRetCode {

		var EchoReply v_echoRep;
		var FncRetCode v_ret;

		v_ret := f_sendEchoRequest( m_echoRequest_noExtHdr_noData( p_llaAddrTn,
															p_llaAddrNut,
															p_identifier,
															p_seqNo ));
		if ( v_ret != e_success ) {return v_ret;}
		tc_ac.start;
		alt {
			[]	ipPort.receive(mw_echoReply ( 	p_llaAddrNut,
												p_llaAddrTn )) -> value v_echoRep {
					p_icmpPkt := v_echoRep ;
					tc_ac.stop;	
					return e_success;
				}
			[]	tc_ac.timeout{
					return e_timeout;
				}		
		} // end alt
	} // end f_echoProcUp

	/*
	 * @desc 	This sends an ICMPv6 echo request from an IPv6 node to any NUT,
	 *			and waits for a echo reply for a fixed amount of time. 
	 * @remark  Time limit is defined by module parameter PX_TAC (see comp type)
	 * @param 	p_llaAddrTn Local link address of testing node which calls this function 
	 * @param 	p_llaAddrNut Local link address of node under test
	 * @param 	p_identifier Idenitifier to be used in ICMPv6 echo request 
	 * @param 	p_seqNo Sequence number to be used in ICMPv6 echo request 
	 * @return 	execution status
	*/
	function f_replyToEchoRequest(in  template Ipv6Address 	p_llaAddrTn,
								  in  template Ipv6Address 	p_llaAddrNut,
								  in  UInt16 		p_identifier,
								  in  UInt16		p_seqNo,
								  out EchoRequest 	p_echoRequest)
	runs on LibIpv6Node
	return FncRetCode {

		var FncRetCode v_ret := e_error;
		
		tc_ac.start;
		alt {
			[]	ipPort.receive(mw_echoRequest ( 	p_llaAddrNut,
												p_llaAddrTn )) -> value p_echoRequest {
					tc_ac.stop;	
					v_ret := e_success;
				}
			[]	tc_ac.timeout{
					return e_timeout;
				}		
		} // end alt

		v_ret := f_sendEchoReply( m_echoReply_noExtHdr_data( p_llaAddrTn,
															p_llaAddrNut,
															p_identifier,
															p_seqNo,
															p_echoRequest.ipv6Payload.echoRequestMsg.data ));
		return v_ret ;

	} // end f_replyToEchoRequest
	
	/*
	 * @desc 	This sends an ICMPv6 echo request from an IPv6 node to any 
	 *			NUT, and does not a reply wihtin a given time limit. 
	 *			This function can be used to verify that the NUT is NOT 
	 *			up and running.
	 * @remark  Time limit is defined by module parameter PX_TNOAC (see comp type)
	 * @param 	p_llaAddrTn Local link address of testing node which calls this function 
	 * @param 	p_llaAddrNut Local link address of node under test
	 * @return 	execution status
	*/
	function f_echoProcDown( template Ipv6Address p_llaAddrTn, template Ipv6Address p_llaAddrNut)
	runs on LibIpv6Node
	return FncRetCode {
		
//		var EchoReply v_echoReply;
//		if ( f_echoProcUp( p_llaAddrTn, p_llaAddrNut, c_defId, c_defSeqNo, v_echoReply) == e_timeout ) {
//			// that means no echo reply was received - this is what we want here
//			return e_success;
//		} else {
//			return e_error;
//		}
		
		var EchoReply v_echoRep;
		var FncRetCode v_ret;

		v_ret := f_sendEchoRequest( m_echoRequest_noExtHdr_noData( 	p_llaAddrTn,
																	p_llaAddrNut,
																	c_defId,
																	c_defSeqNo ));
		if ( v_ret != e_success ) {return v_ret;}
		tc_noAc.start;
		alt {
			[]	ipPort.receive(mw_echoReply ( 	p_llaAddrNut,
												p_llaAddrTn )) -> value v_echoRep {
					tc_noAc.stop;	
					return e_error;
				}
			[]	tc_noAc.timeout{
					return e_success;
				}		
		} // end alt
	}//end f_echoProcDown

	/*
	 * @desc  	This sends an ICMPv6 echo request from an IPv6 node to 
	 *          any NUT. Prior it modifies IPv6 packet payload length 
	 *			and ICMPv6 checksum to their correct values using external 
	 *          functions.
	 * @remark  The template passed in must NOT contain any matching expressions!
	 * @param 	p_echoRequest Ipv6 packet value or template with echo request to be sent
	 * @param 	p_payloadLength Length of the IPv6 payload to be sent
	 * @return 	execution status
	*/
	function f_sendEchoRequest_noCalcPayloadLength (in template EchoRequest p_echoRequest,
		UInt16 p_payloadLength ) 
	runs on LibIpv6Node
	return FncRetCode {
		var EchoRequest v_ipPkt;
		v_ipPkt := valueof(p_echoRequest);

		//set payload length
		v_ipPkt.ipv6Hdr.payloadLength := p_payloadLength;

		if(f_setExtensionHeaders(	v_ipPkt ) != e_success) {
			log(" **** f_sendEchoRequest_noCalcPayloadLength: Error when calculating length of extension headers ****");
			return e_error;
		}

		//send
		ipPort.send(v_ipPkt);

		return e_success;

	}//end f_sendEchoRequest_noCalcPayloadLength

	/*
	 * @desc  	This sends an ICMPv6 echo request from an IPv6 node to 
	 *          any NUT. Prior it modifies IPv6 packet payload length 
	 *			and ICMPv6 checksum to their correct values using external 
	 *          functions. Waits for a Parameter Problem message.
	 * @param 	p_echoRequest Ipv6 packet value or template with echo request to be sent (must not contains wildcards)
	 * @param 	p_parameterProblem Parameter Problem message we are waiting for.
	 * @return 	execution status
	*/
	function f_getParameterProblemAfterEchoReq_ignoreEchoReply (
		in template EchoRequest p_echoRequest,
		in template ParameterProblem p_parameterProblem )
	runs on LibIpv6Node
	return FncRetCode {
		var FncRetCode v_ret;
		var boolean v_ppReceived := false;

		v_ret := f_sendEchoRequest ( p_echoRequest );

		if ( v_ret != e_success ) {
			return v_ret;
		}

		tc_ac.start;
		alt {
			[]	ipPort.receive ( p_parameterProblem ) {
					v_ppReceived := true;
					repeat;
				}
			[]	ipPort.receive ( ParameterProblem:? ) {
					log("**** f_getParameterProblemAfterEchoReq_ignoreEchoReply: ERROR: Template mismatch **** ");
					v_ret := e_error;
				}
			[]	ipPort.receive(mw_echoReply ( 	p_echoRequest.ipv6Hdr.destinationAddress,
												p_echoRequest.ipv6Hdr.sourceAddress ) ) {
					tc_ac.stop;	
					log("**** f_getParameterProblemAfterEchoReq_ignoreEchoReply: ERROR: An Echo Reply was received, HUT did not discard our Echo Request **** ");
					v_ret := e_error;
				}
			[v_ppReceived==false]	tc_ac.timeout{
					v_ret := e_timeout;
				}		
			[v_ppReceived==true]	tc_ac.timeout{
					v_ret := e_success;
				}		
		} // end alt

		return v_ret;

	}//end f_getParameterProblemAfterEchoReq_ignoreEchoReply

	

	/*
	 * @desc 	This sends an ICMPv6 echo request from an IPv6 node to any
	 *			NUT, and waits for a echo reply for a fixed amount of time.
	 *          This function can be used to verify that the NUT is
	 *			up and running. Neighbor detection is handled here, rather than in
	 *			a default. Might be useful if NUT must perform neighbor detection.
	 * @remark  Time limit is defined by module parameter PX_TAC (see comp type)
	 * @param 	p_llaAddrTn Local link address of testing node which calls this function
	 * @param 	p_llaAddrNut Local link address of node under test
	 * @return 	execution status
	*/
	function f_echoProcUp_withHopL255Len1280(
							in  template Ipv6Address p_llaAddrTn,
							in  template Ipv6Address p_llaAddrNut)
	runs on LibIpv6Node	return FncRetCode {

	var FncRetCode v_ret;
	v_ret := f_sendEchoRequest (
		m_echoRequest_noExtHdr_data_hop (
			p_llaAddrTn,
			p_llaAddrNut,
			c_hopLimit255,
			c_defId,
			c_defSeqNo,
			c_1280ZeroBytes ) );

	if ( v_ret == e_success ) {
		tc_ac.start;
			alt {
				[]	ipPort.receive (
						mw_echoReply_noExtHdr_data_hop (
							p_llaAddrNut,
							p_llaAddrTn,
							c_hopLimit255,
							c_1280ZeroBytes ) ) {
						tc_ac.stop;
						return e_success;
					}
				[]	tc_ac.timeout{
						return e_timeout;
					}
			} // end alt
		} // End If
    return v_ret;
	} // End function f_echoProcUp_withHopL255Len1280

	/*
	 * @desc  	This sends other ICMPv6 packet from an IPv6 node to 
	 *          any IUT. Prior it modifies IPv6 packet payload length 
	 *			and ICMPv6 checksum to their correct values using external 
	 *          functions.
	 * @remark  The template passed in must NOT contain any matching expressions!
	 * @param 	p_otherIcmpv6 Ipv6 packet value or template with the ICMPv6 packet to be sent
	 * @return 	execution status
	*/
	function f_sendOtherIcmpv6 (in template OtherIcmpv6 p_otherIcmpv6) 
	runs on LibIpv6Node
	return FncRetCode {
		var OtherIcmpv6 v_ipPkt;
		v_ipPkt := valueof(p_otherIcmpv6);

		//set Extension Header
		if(f_setExtensionHeaders(	v_ipPkt ) != e_success) {
			log(" **** f_sendOtherIcmpv6: Error when calculating length of extension headers ****");
			return e_error;
		}

		//send
		ipPort.send(v_ipPkt);
		
		return e_success;
		
	} // end f_sendOtherIcmpv6

	/*
	 * @desc  	This sends an ICMPv6 Destination Unreachable message to 
	 *          any IUT. Prior it modifies IPv6 packet payload length 
	 *			and ICMPv6 checksum to their correct values using external 
	 *          functions.
	 * @remark  The template passed in must NOT contain any matching expressions!
	 * @param 	p_destUnreachable Ipv6 packet value or template with the Destination
	 *			Unreachable message to be sent
	 * @return 	execution status
	*/
	function f_sendDestUnreachable (in template DestinationUnreachable p_destUnreachable ) 
	runs on LibIpv6Node
	return FncRetCode {
		var DestinationUnreachable v_ipPkt;
		v_ipPkt := valueof(p_destUnreachable);

		//set Extension Header
		if(f_setExtensionHeaders(	v_ipPkt ) != e_success) {
			log(" **** f_sendDestUnreachable: Error when calculating length of extension headers ****");
			return e_error;
		}

		//send
		ipPort.send(v_ipPkt);
		
		return e_success;
		
	} // end f_sendDestUnreachable

	/*
	 * @desc  	This sends an ICMPv6 Packet Too Big message to 
	 *          any IUT. Prior it modifies IPv6 packet payload length 
	 *			and ICMPv6 checksum to their correct values using external 
	 *          functions.
	 * @remark  The template passed in must NOT contain any matching expressions!
	 * @param 	p_packetTooBig Ipv6 packet value or template with the Packet
	 *			Too Big message to be sent
	 * @return 	execution status
	*/
	function f_sendPacketTooBig (in template PacketTooBig p_packetTooBig ) 
	runs on LibIpv6Node
	return FncRetCode {
		var PacketTooBig v_ipPkt;
		v_ipPkt := valueof(p_packetTooBig);


		//set Extension Header
		if(f_setExtensionHeaders(	v_ipPkt ) != e_success) {
			log(" **** f_sendPacketTooBig: Error when calculating length of extension headers ****");
			return e_error;
		}

		//send
		ipPort.send(v_ipPkt);
		
		return e_success;
		
	} // end f_sendPacketTooBig

	/*
	 * @desc  	This sends an ICMPv6 Packet Too Big message to 
	 *          any IUT. Prior it modifies IPv6 packet payload length 
	 *			and ICMPv6 checksum to their correct values using external 
	 *          functions.
	 * @remark  The template passed in must NOT contain any matching expressions!
	 * @param 	p_timeExceeded Ipv6 packet value or template with the Time
	 *			Exceeded message to be sent
	 * @return 	execution status
	*/
	function f_sendTimeExceeded (in template TimeExceeded p_timeExceeded ) 
	runs on LibIpv6Node
	return FncRetCode {
		var TimeExceeded v_ipPkt;
		v_ipPkt := valueof(p_timeExceeded);

		//set Extension Header
		if(f_setExtensionHeaders(	v_ipPkt ) != e_success) {
			log(" **** f_sendTimeExceeded: Error when calculating length of extension headers ****");
			return e_error;
		}

		//send
		ipPort.send(v_ipPkt);
		
		return e_success;
		
	} // end f_sendTimeExceeded

	/*
	 * @desc  	This sends an ICMPv6 Packet Too Big message to 
	 *          any IUT. Prior it modifies IPv6 packet payload length 
	 *			and ICMPv6 checksum to their correct values using external 
	 *          functions.
	 * @remark  The template passed in must NOT contain any matching expressions!
	 * @param 	p_parameterProblem Ipv6 packet value or template with the Parameter
	 *			Problem message to be sent
	 * @return 	execution status
	*/
	function f_sendParameterProblem (in template ParameterProblem p_parameterProblem ) 
	runs on LibIpv6Node
	return FncRetCode {
		var ParameterProblem v_ipPkt;
		v_ipPkt := valueof(p_parameterProblem);

		//set Extension Header
		if(f_setExtensionHeaders(	v_ipPkt ) != e_success) {
			log(" **** f_sendParameterProblem: Error when calculating length of extension headers ****");
			return e_error;
		}

		//send
		ipPort.send(v_ipPkt);
		
		return e_success;
		
	} // end f_sendParameterProblem

	/*
	 * @desc 	This sends an ICMPv6 echo request from an IPv6 node to any
	 *			NUT, and waits for a echo reply for a fixed amount of time. 
     *          This function can be used to verify that the NUT is 
	 *			up and running.
	 * @remark  Time limit is defined by module parameter PX_TAC (see comp type)
	 * @param 	p_glaA Global address of tunnel entry point ( testing node 1)
	 * @param 	p_glaB Global address of tunnel exit point (IUT)
	 * @param 	p_glaC Src Global address of tunneled packet ( MN Home Address)
	 * @param 	p_glaD Dst Global address of tunneled packet ( testing node 2)
	 * @param 	p_identifier Idenitifier to be used in ICMPv6 echo request 
	 * @param 	p_seqNo Sequence number to be used in ICMPv6 echo request 
	 * @param 	p_icmpPkt IPv6 packet which has been received 
	 * @return 	execution status
	*/
	function f_echoProc_tunneled(  	in template Ipv6Address p_glaA,
									in template Ipv6Address p_glaB,
									in template Ipv6Address p_glaC,
									in template Ipv6Address p_glaD,
									in  UInt16 		p_identifier,
									in  UInt16 		p_seqNo,
									out EchoReply	p_icmpPkt)
	runs on LibIpv6Node
	return FncRetCode {

		var EchoReply v_echoRep;
		var FncRetCode v_ret;

		v_ret := f_sendEchoRequest(
					m_echoRequest_extHdr_data (
							c_tunneledIpHdr,
							m_extHdrList_1Elem (
								m_extHdr_tunneledHeader (
									c_icmpHdr,
									p_glaC,
									p_glaD)),
							p_glaA,
							p_glaB,
							c_defId,
							c_defSeqNo,
							c_8ZeroBytes ));

		if ( v_ret != e_success ) {return v_ret;}
		tc_ac.start;
		alt {
			[]	ipPort.receive(mw_echoReply_extHdr_data (
									p_glaB,
									p_glaA,
									c_tunneledIpHdr,
									m_extHdrList_1Elem (
										mw_extHdr_tunneledHeader (
											c_icmpHdr,
											p_glaD,
											p_glaC )),
									c_defId,
									c_defSeqNo,
									c_8ZeroBytes)) -> value v_echoRep {
					p_icmpPkt := v_echoRep ;
					tc_ac.stop;	
					return e_success;
				}
			[]	tc_ac.timeout{
					return e_timeout;
				}		
		} // end alt
		
	} // end f_echoProc_tunneled

} // end module LibIpv6_Rfc2463Icmpv6_Functions