def __init__ (self,data):
self.type = PeerType(ord(data[2]))
self.flag = PeerFlag(ord(data[3]))
self.distinguisher = unpack('!L',data[4:8])[0]
self.asn = unpack('!L',data[28:32])[0]
self.id = IPv4.unpack(data[32:36])
if self.flag.ipv4(): self.peer_address = IPv4.unpack(data[24:28])
if self.flag.ipv6(): self.peer_address = IPv6.unpack(data[12:28])
def __init__(self, data):
self.type = PeerType(ord(data[2]))
self.flag = PeerFlag(ord(data[3]))
self.distinguisher = unpack('!L', data[4:8])[0]
self.asn = unpack('!L', data[28:32])[0]
self.id = IPv4.unpack(data[32:36])
if self.flag.ipv4(): self.peer_address = IPv4.unpack(data[24:28])
if self.flag.ipv6(): self.peer_address = IPv6.unpack(data[12:28])
def unpack(cls, data, length):
sid = IPv6.unpack(data[1:17])
behavior = unpack("!H", data[18:20])[0]
subsubtlvs = []
data = data[21:]
while data:
code = data[0]
length = unpack("!H", data[1:3])[0]
if code in cls.registered_subsubtlvs:
subsubtlv = klass = cls.registered_subsubtlvs[code].unpack(
data[3:length + 3], length)
else:
subsubtlv = GenericSrv6ServiceDataSubSubTlv(
code, data[3:length + 3])
subsubtlvs.append(subsubtlv)
data = data[length + 3:]
return cls(sid=sid, behavior=behavior, subsubtlvs=subsubtlvs)
def unpack(data):
ip, bit = unpack('!16sH', data[2:20])
return TrafficNextHopIPv6IETF(IPv6.ntop(ip), bool(bit & 0x01),
data[:20])
def prefix_sid_srv6(tokeniser):
value = tokeniser()
if value != "(":
raise Exception("expect '(', but received '%s'" % value)
service_type = tokeniser()
if service_type not in ["l3-service", "l2-service"]:
raise Exception(
"expect 'l3-service' or 'l2-service', but received '%s'" % value)
sid = IPv6.unpack(IPv6.pton(tokeniser()))
behavior = 0xFFFF
subtlvs = []
subsubtlvs = []
value = tokeniser()
if value != ")":
base = 10 if not value.startswith("0x") else 16
behavior = int(value, base)
value = tokeniser()
if value == "[":
values = []
for i in range(6):
if i != 0:
value = tokeniser()
if value != ",":
raise Exception("expect ',', but received '%s'" %
value)
value = tokeniser()
base = 10 if not value.startswith("0x") else 16
values.append(int(value, base))
value = tokeniser()
if value != "]":
raise Exception("expect ']', but received '%s'" % value)
value = tokeniser()
subsubtlvs.append(
Srv6SidStructure(
loc_block_len=values[0],
loc_node_len=values[1],
func_len=values[2],
arg_len=values[3],
tpose_len=values[4],
tpose_offset=values[5],
))
subtlvs.append(
Srv6SidInformation(
sid=sid,
behavior=behavior,
subsubtlvs=subsubtlvs,
))
if value != ")":
raise Exception("expect ')', but received '%s'" % value)
if service_type == "l3-service":
return PrefixSid([Srv6L3Service(subtlvs=subtlvs)])
elif service_type == "l2-service":
return PrefixSid([Srv6L2Service(subtlvs=subtlvs)])