def decode(self, rtid, packet, offset, dlen):
rtype = rtypebyid(rtid)
origoff = offset
rdata = {}
if rtype is None:
rtype = (rtid, "Unknown", [("s", "unknown", "strc", dlen)])
for e in rtype[2]:
if e[2] == "strc":
d = packet[offset:offset + e[3]]
offset += e[3]
if e[2] == "cmdn":
d, offset = proto.decodename(packet, offset)
if e[2] == "lstr":
dl = ord(packet[offset])
offset += 1
d = packet[offset:offset + dl]
offset += dl
if e[2] == "llstr":
(dl,) = struct.unpack(">H", packet[offset:offset + struct.calcsize(">H")])
offset += struct.calcsize(">H")
d = packet[offset:offset + dl]
offset += dl
if e[2] == "short":
(d,) = struct.unpack(">H", packet[offset:offset + struct.calcsize(">H")])
offset += struct.calcsize(">H")
if e[2] == "long":
(d,) = struct.unpack(">L", packet[offset:offset + struct.calcsize(">L")])
offset += struct.calcsize(">L")
if e[2] == "int6":
(d,) = struct.unpack(">Q", ("\0" * (struct.calcsize(">Q") - 6)) + packet[offset:offset + 6])
offset += 6
rdata[e[1]] = d
if origoff + dlen != offset:
raise malformedrr(rtype[1] + " RR data length mismatch")
return rrdata(rtype, rdata)
def decode(self, packet, offset):
name, offset = proto.decodename(packet, offset)
rtype, rclass = struct.unpack(">HH", packet[offset:offset + struct.calcsize(">HH")])
offset += struct.calcsize(">HH")
ret = rrhead(name, rtype, rclass)
return ret, offset
