extend ASN.1 schema for requesting load information

contributes to #71

FediChord.asn1

@@ -6,7 +6,7 @@ Domain ::= VisibleString
 
 Partnum ::= INTEGER (0..150)
 
-Action ::= ENUMERATED {queryID, join, leave, stabilise, ping}
+Action ::= ENUMERATED {queryID, join, leave, stabilise, ping, queryLoad}
 
 Request ::= SEQUENCE {
 	action			Action,
@@ -17,9 +17,10 @@ Request ::= SEQUENCE {
 	actionPayload	CHOICE {
 		queryIDRequestPayload		QueryIDRequestPayload,
 		joinRequestPayload			JoinRequestPayload,
-		leaveRequestPayload		LeaveRequestPayload,
-		stabiliseRequestPayload	StabiliseRequestPayload,
-		pingRequestPayload			PingRequestPayload
+		leaveRequestPayload			LeaveRequestPayload,
+		stabiliseRequestPayload		StabiliseRequestPayload,
+		pingRequestPayload			PingRequestPayload,
+		loadRequestPayload			LoadRequestPayload
 		}			OPTIONAL			-- just for symmetry reasons with response, requests without a payload have no meaning
 	}
 
@@ -34,11 +35,12 @@ Response ::= SEQUENCE {
 	finalPart		BOOLEAN,	-- flag indicating this `part` to be the last of this response
 	action			Action,
 	actionPayload	CHOICE {
-		queryIDResponsePayload	QueryIDResponsePayload,
-		joinResponsePayload		JoinResponsePayload,
+		queryIDResponsePayload		QueryIDResponsePayload,
+		joinResponsePayload			JoinResponsePayload,
 		leaveResponsePayload		LeaveResponsePayload,
 		stabiliseResponsePayload	StabiliseResponsePayload,
-		pingResponsePayload		PingResponsePayload
+		pingResponsePayload			PingResponsePayload,
+		loadResponsePayload			LoadResponsePayload
 		}			OPTIONAL			-- no payload when just ACKing a previous request
 	}
 
@@ -101,5 +103,14 @@ PingRequestPayload ::= NULL		-- do not include a node/ vserver ID, so that
 -- learning all active vserver IDs handled by the server at once
 PingResponsePayload ::= SEQUENCE OF NodeState
 
+LoadRequestPayload ::= SEQUENCE {
+	lowerBound		NodeID,
+	upperBound		NodeID
+	}
+
+LoadResponsePayload ::= SEQUENCE {
+	loadSum					REAL,
+	remainingLoadTarget		REAL
+	}
 
 END