def unpack (cls, data): datalen = len(data) rd = RouteDistinguisher.unpack(data[:8]) esi = ESI.unpack(data[8:18]) etag = EthernetTag.unpack(data[18:22]) maclength = ord(data[22]) if (maclength > 48 or maclength < 0): raise Notify(3,5,'invalid MAC Address length in %s' % cls.NAME) end = 23 + 6 # MAC length MUST be 6 mac = MACQUAL.unpack(data[23:end]) length = ord(data[end]) iplen = length / 8 if datalen in [36,39]: # No IP information (1 or 2 labels) iplenUnpack = 0 if iplen != 0: raise Notify(3,5,"IP length is given as %d, but current MAC route has no IP information" % iplen) elif datalen in [40, 43]: # Using IPv4 addresses (1 or 2 labels) iplenUnpack = 4 if (iplen > 32 or iplen < 0): raise Notify(3,5,"IP field length is given as %d, but current MAC route is IPv4 and valus is out of range" % iplen) elif datalen in [52, 55]: # Using IPv6 addresses (1 or 2 labels) iplenUnpack = 16 if (iplen > 128 or iplen < 0): raise Notify(3,5,"IP field length is given as %d, but current MAC route is IPv6 and valus is out of range" % iplen) else: raise Notify(3,5,"Data field length is given as %d, but does not match one of the expected lengths" % datalen) ip = IP.unpack(data[end+1:end+1+iplenUnpack]) label = Labels.unpack(data[end+1+iplenUnpack:end+1+iplenUnpack+3]) return cls(rd,esi,etag,mac,maclength,label,ip,data)
def unpack(cls, data):
datalen = len(data)
rd = RouteDistinguisher.unpack(data[:8])
esi = ESI.unpack(data[8:18])
etag = EthernetTag.unpack(data[18:22])
maclength = ord(data[22])
if (maclength > 48 or maclength < 0):
raise Notify(3, 5, 'invalid MAC Address length in %s' % cls.NAME)
end = 23 + 6 # MAC length MUST be 6
mac = MACQUAL.unpack(data[23:end])
length = ord(data[end])
iplen = length / 8
if datalen in [36, 39]: # No IP information (1 or 2 labels)
iplenUnpack = 0
if iplen != 0:
raise Notify(
3, 5,
"IP length is given as %d, but current MAC route has no IP information"
% iplen)
elif datalen in [40, 43]: # Using IPv4 addresses (1 or 2 labels)
iplenUnpack = 4
if (iplen > 32 or iplen < 0):
raise Notify(
3, 5,
"IP field length is given as %d, but current MAC route is IPv4 and valus is out of range"
% iplen)
elif datalen in [52, 55]: # Using IPv6 addresses (1 or 2 labels)
iplenUnpack = 16
if (iplen > 128 or iplen < 0):
raise Notify(
3, 5,
"IP field length is given as %d, but current MAC route is IPv6 and valus is out of range"
% iplen)
else:
raise Notify(
3, 5,
"Data field length is given as %d, but does not match one of the expected lengths"
% datalen)
ip = IP.unpack(data[end + 1:end + 1 + iplenUnpack])
label = Labels.unpack(data[end + 1 + iplenUnpack:])
return cls(rd, esi, etag, mac, maclength, label, ip, data)
def unpack (cls, data):
rd = RouteDistinguisher.unpack(data[:8])
esi = ESI.unpack(data[8:18])
etag = EthernetTag.unpack(data[18:22])
maclength = ord(data[22])
if maclength % 8 != 0:
raise Exception('invalid MAC Address length in %s' % cls.NAME)
end = 23 + maclength/8
mac = MACQUAL.unpack(data[23:end])
length = ord(data[end])
if length % 8 != 0:
raise Exception('invalid IP Address length in %s' % cls.NAME)
iplen = length / 8
ip = IP.unpack(data[end+1:end+1+iplen])
label = Labels.unpack(data[end+1+iplen:])
return cls(rd,esi,etag,mac,maclength,label,ip,data)