def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
if rdlen < 3:
raise exception.FormError
header = struct.unpack('!BBB', wire[current:current + 3])
gateway_type = header[1]
current += 3
rdlen -= 3
if gateway_type == 0:
gateway = None
elif gateway_type == 1:
gateway = inet.inet_ntop(inet.AF_INET, wire[current:current + 4])
current += 4
rdlen -= 4
elif gateway_type == 2:
gateway = inet.inet_ntop(inet.AF_INET6, wire[current:current + 16])
current += 16
rdlen -= 16
elif gateway_type == 3:
(gateway, cused) = name.from_wire(wire[:current + rdlen], current)
current += cused
rdlen -= cused
else:
raise exception.FormError('invalid IPSECKEY gateway type')
key = wire[current:current + rdlen].unwrap()
return cls(rdclass, rdtype, header[0], gateway_type, header[2],
gateway, key)
def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
if rdlen < 3:
raise exception.FormError
header = struct.unpack("!BBB", wire[current : current + 3])
gateway_type = header[1]
current += 3
rdlen -= 3
if gateway_type == 0:
gateway = None
elif gateway_type == 1:
gateway = inet.inet_ntop(inet.AF_INET, wire[current : current + 4])
current += 4
rdlen -= 4
elif gateway_type == 2:
gateway = inet.inet_ntop(inet.AF_INET6, wire[current : current + 16])
current += 16
rdlen -= 16
elif gateway_type == 3:
(gateway, cused) = name.from_wire(wire[: current + rdlen], current)
current += cused
rdlen -= cused
else:
raise exception.FormError("invalid IPSECKEY gateway type")
key = wire[current : current + rdlen].unwrap()
return cls(rdclass, rdtype, header[0], gateway_type, header[2], gateway, key)
def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
items = []
while 1:
if rdlen == 0:
break
if rdlen < 4:
raise exception.FormError
header = struct.unpack('!HBB', wire[current:current + 4])
afdlen = header[2]
if afdlen > 127:
negation = True
afdlen -= 128
else:
negation = False
current += 4
rdlen -= 4
if rdlen < afdlen:
raise exception.FormError
address = wire[current:current + afdlen].unwrap()
l = len(address)
if header[0] == 1:
if l < 4:
address += '\x00' * (4 - l)
address = inet.inet_ntop(inet.AF_INET, address)
elif header[0] == 2:
if l < 16:
address += '\x00' * (16 - l)
address = inet.inet_ntop(inet.AF_INET6, address)
else:
#
# This isn't really right according to the RFC, but it
# seems better than throwing an exception
#
address = address.encode('hex_codec')
current += afdlen
rdlen -= afdlen
item = APLItem(header[0], negation, address, header[1])
items.append(item)
return cls(rdclass, rdtype, items)
def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None):
items = []
while 1:
if rdlen == 0:
break
if rdlen < 4:
raise exception.FormError
header = struct.unpack('!HBB', wire[current : current + 4])
afdlen = header[2]
if afdlen > 127:
negation = True
afdlen -= 128
else:
negation = False
current += 4
rdlen -= 4
if rdlen < afdlen:
raise exception.FormError
address = wire[current : current + afdlen].unwrap()
l = len(address)
if header[0] == 1:
if l < 4:
address += '\x00' * (4 - l)
address = inet.inet_ntop(inet.AF_INET, address)
elif header[0] == 2:
if l < 16:
address += '\x00' * (16 - l)
address = inet.inet_ntop(inet.AF_INET6, address)
else:
#
# This isn't really right according to the RFC, but it
# seems better than throwing an exception
#
address = address.encode('hex_codec')
current += afdlen
rdlen -= afdlen
item = APLItem(header[0], negation, address, header[1])
items.append(item)
return cls(rdclass, rdtype, items)
def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
address = inet.inet_ntop(inet.AF_INET6, wire[current:current + rdlen])
return cls(rdclass, rdtype, address)
def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None):
address = inet.inet_ntop(inet.AF_INET6,
wire[current : current + rdlen])
return cls(rdclass, rdtype, address)
