Charge each listed TLV occurrence against the reassembly cap, and file the unknown-tag gap

src/reassembly.ts

@@ -73,6 +73,9 @@ function detach(pduObj: PduObject): PduObject {
 	return { ...pduObj, params, shortMessageOctets: octets, tlvs };
 }
 
+// Roughly the heap a listed occurrence costs beyond its value, so a PDU of empty repeats is not free.
+const listedTlvOverhead = 200;
+
 // A cstring param arrives as a string, and source_addr alone can carry most of a 1 MiB PDU.
 function sizeOf(value: ParamValue): number {
 	if (Buffer.isBuffer(value)) return value.length;
@@ -88,7 +91,9 @@ function octetsOf(pduObj: PduObject): number {
 	}
 
 	for (const tlv of Object.values(pduObj.tlvs)) {
-		octets += tlvOctets(tlv.tagValue);
+		const listed = Array.isArray(tlv.tagValue) ? tlv.tagValue.length : 0;
+
+		octets += tlvOctets(tlv.tagValue) + listed * listedTlvOverhead;
 	}
 
 	return octets;