ntp.ry

ftam等标准协议服务器和客户端的源代码。

-- NTP definitions for ROS specification
--
-- Julian Onions, Nottingham University, UK.
--
-- Mon Jun  5 10:07:07 1989
--

NTP DEFINITIONS ::=

BEGIN

update OPERATION
	ARGUMENT Packet
	::= 0

query OPERATION
	ARGUMENT NULL
	RESULT ClockInfoList
	::= 1

-- Data Structures

BindArgument ::=
	SEQUENCE {
		psap[0] IA5String OPTIONAL,
		version[1] BITSTRING {
			version-0(0),
			version-1(1),
			version-2(2)
		} DEFAULT version-2,
		authentication[2] Authentication OPTIONAL,
		mode[3] BindMode
	}

Authentication ::= ANY

BindMode ::= ENUMERATED {
		normal(0),	-- standard NTP
		query(1)	-- queries only
	}

BindResult ::= 
	SEQUENCE {
		version[1] INTEGER DEFAULT 2,
		authentication[2] Authentication OPTIONAL,
		mode[3] BindMode
	}
			
BindError ::=
	SEQUENCE {
		reason[0] INTEGER {
			refused(0),
			validation(1),
			version(2),	-- version not supported
			badarg(3),	-- bad bind argument
			congested(4)	-- catch all!
		},
		supplementary[1] IA5String OPTIONAL
	}

Packet ::= SEQUENCE {
	leap			Leap,
	mode			Mode,
	stratum[1]		INTEGER,
	pollInterval[2]		INTEGER,
	precision[3]		INTEGER,
	synchDistance		SmallFixed,
	synchDispersion		SmallFixed,
	referenceClockIdentifier ClockIdentifier,
	referenceTimestamp	TimeStamp,
	originateTimestamp	TimeStamp,
	receiveTimestamp	TimeStamp,
	transmitTimestamp	TimeStamp
}


ClockInfoList ::= SET OF ClockInfo

ClockInfo ::= SEQUENCE {
	remoteAddress		Address,
	localAddress		Address,
	flags[0] 		BIT STRING {
			configured(0),
			authentable(1),
			sane(2),
			candidate(3),
			sync(4),
			broadcast(5),
			referenceClock(6),
			selected(7),
			inactive(8)
	},
	packetsSent[1]		INTEGER,
	packetsReceived[2]	INTEGER,
	packetsDropped[3]	INTEGER,
	timer[4]		INTEGER,
	leap 			Leap,
	stratum[5]		INTEGER,
	ppoll[6]		INTEGER,
	hpoll[7]		INTEGER,
	precision[8]		INTEGER,
	reachability[9]		INTEGER,
	estdisp[10]		INTEGER,
	estdelay[11]		INTEGER,
	estoffset[12]		INTEGER,
	reference[13]		ClockIdentifier OPTIONAL,
	reftime			TimeStamp,
	filters			SEQUENCE OF Filter
}

Leap ::= [APPLICATION 0] ENUMERATED {
		nowarning(0),
		plussecond(1),
		minussecond(2),
		alarm(3)
	}

SmallFixed ::= [APPLICATION 1] IMPLICIT SEQUENCE {
		integer INTEGER,
		fraction INTEGER
	}

ClockIdentifier ::= CHOICE {
			referenceClock[0] PrintableString,
			inetaddr[1] OCTET STRING,
			psapaddr[2] OCTET STRING
	}

TimeStamp ::= [APPLICATION 2] IMPLICIT SEQUENCE {
		integer INTEGER,
		fraction INTEGER
	}

KeyId ::= [APPLICATION 4] INTEGER

Mode ::= [APPLICATION 4] ENUMERATED {
		unspecified (0),
		symmetricActive (1),
		symmetricPassive (2),
		client (3),
		server (4),
		broadcast (5),
		reservered (6),
		private (7)
	}

Filter ::= SEQUENCE {
		offset INTEGER,
		delay INTEGER
	}

Address ::= OCTET STRING -- for now
END