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	** @param   p_msg Ipv6 packet

	** @return  payload length in bytes

	*/

	external function fx_payloadLength( Ipv6Packet p_msg ) 

	external function fx_payloadLength( in template Ipv6Packet p_msg ) 

	return UInt16;

	/* @desc   This external function calculates the checksum for any

	** @param  p_packet ICMPv6 packet 

	** @return checksum value 

	*/

	external function fx_icmpv6Checksum( in Ipv6Packet p_packet) 

	external function fx_icmpv6Checksum( in template Ipv6Packet p_packet) 

	return Oct2;

	external function fx_encodeMessage (in Ipv6Packet p_msg)

	external function fx_encodeMessage (in template Ipv6Packet p_msg)

	return octetstring;

	template Ipv6Packet mw_ipPkt := ? ;

	template Ipv6Packet m_ipPkt_echoRequest (EchoRequest p_echoRequest) := {

	template Ipv6Packet m_ipPkt_echoRequest (in template EchoRequest p_echoRequest) := {

		echoRequest := p_echoRequest

	}