def test_CAA_from_wire(self):
rdata = dns.rdata.from_text(dns.rdataclass.IN, dns.rdatatype.CAA, u'0 issue "ca.example.net"')
f = BytesIO()
rdata.to_wire(f)
wire = f.getvalue()
rdlen = len(wire)
wire += b"trailing garbage"
rdata2 = dns.rdata.from_wire(dns.rdataclass.IN, dns.rdatatype.CAA, wire, 0, rdlen)
self.failUnless(rdata == rdata2)
def test_CAA_from_wire(self):
rdata = dns.rdata.from_text(dns.rdataclass.IN, dns.rdatatype.CAA,
u'0 issue "ca.example.net"')
f = BytesIO()
rdata.to_wire(f)
wire = f.getvalue()
rdlen = len(wire)
wire += b"trailing garbage"
rdata2 = dns.rdata.from_wire(dns.rdataclass.IN, dns.rdatatype.CAA,
wire, 0, rdlen)
self.failUnless(rdata == rdata2)
def test_NSEC3_bad_bitmaps(self):
rdata = dns.rdata.from_text(
dns.rdataclass.IN, dns.rdatatype.NSEC3,
u"1 0 100 ABCD SCBCQHKU35969L2A68P3AD59LHF30715 A CAA")
with self.assertRaises(dns.exception.FormError):
copy = bytearray(rdata.to_wire())
copy[-3] = 0
dns.rdata.from_wire('IN', 'NSEC3', copy, 0, len(copy))
def chop_and_write_rr_response(rr):
name = dns.name.from_text(rr.rrname)
# print rr.rrname
wire = name.to_wire()
fp.write(pack('B', len(wire)))
fp.write(wire)
fp.write(pack('H', rr.type))
fp.write(pack('H', rr.rclass))
fp.write(pack('L', rr.ttl))
try:
rdata = dns.rdata.from_wire(rr.rclass, rr.type, rr.rdata, 0,
len(rr.rdata))
fp.write(pack('H', len(rr.rdata)))
# print "type ", rr.type, "length ", len(rr.rdata)
# OPT has length 0 - it should have no rdata
rdata.to_wire(fp)
except:
try:
# if rr.rdata[0] != '\#':
rdata = dns.rdata.from_text(rr.rclass, rr.type, rr.rdata)
try:
fp.write(pack('H', len(rdata)))
except:
# no length - no way to know wire length
try:
# print "unknown length for type", rr.type
# if rr.type == 2:
# fp.seek(1, 1)
# old = fp.tell()
# rdata.to_wire(fp)
# size = fp.tell() - old
# fp.seek(-(size + 1), 1)
# fp.write(pack('B', size))
# fp.seek(0, 2)
# else:
rdata.to_wire(fp)
except Exception as e:
print 'Error, exiting: ', e
sys.exit(-1)
except Exception as e:
print 'Error,', e
print 'could not parse rdata type: ', rr.type
print 'dumping directly (hopefully it is SOA)'
# i need to do some kind of rollback here...
fp.write(pack('H', len(rr.rdata)))
fp.write(rr.rdata)
if rr.type == 50:
f = open('nsec3debug', 'wb')
rdata.to_wire(f)
f.close()
def chop_and_write_rr_response(rr):
name = dns.name.from_text(rr.rrname)
# print rr.rrname
wire = name.to_wire()
fp.write(pack('B', len(wire)))
fp.write(wire)
fp.write(pack('H', rr.type))
fp.write(pack('H', rr.rclass))
fp.write(pack('L', rr.ttl))
try:
rdata = dns.rdata.from_wire(rr.rclass, rr.type, rr.rdata, 0, len(rr.rdata))
fp.write(pack('H', len(rr.rdata)))
# print "type ", rr.type, "length ", len(rr.rdata)
# OPT has length 0 - it should have no rdata
rdata.to_wire(fp)
except:
try:
# if rr.rdata[0] != '\#':
rdata = dns.rdata.from_text(rr.rclass, rr.type, rr.rdata)
try:
fp.write(pack('H', len(rdata)))
except:
# no length - no way to know wire length
try:
# print "unknown length for type", rr.type
# if rr.type == 2:
# fp.seek(1, 1)
# old = fp.tell()
# rdata.to_wire(fp)
# size = fp.tell() - old
# fp.seek(-(size + 1), 1)
# fp.write(pack('B', size))
# fp.seek(0, 2)
# else:
rdata.to_wire(fp)
except Exception as e:
print 'Error, exiting: ', e
sys.exit(-1)
except Exception as e:
print 'Error,', e
print 'could not parse rdata type: ', rr.type
print 'dumping directly (hopefully it is SOA)'
# i need to do some kind of rollback here...
fp.write(pack('H', len(rr.rdata)))
fp.write(rr.rdata)
if rr.type == 50:
f = open('nsec3debug', 'wb')
rdata.to_wire(f)
f.close()
def test_digestable_no_downcasing(self):
# Make sure that currently known types with domain names that
# are NOT supposed to be downcased when canonicalized are
# handled properly.
#
cases = [
('HIP', '2 200100107B1A74DF365639CC39F1D578 Ym9ndXM= NAME name'),
('IPSECKEY', '10 3 2 NAME Ym9ndXM='),
('NSEC', 'NAME A'),
]
for rdtype, text in cases:
origin = dns.name.from_text('example')
rdata = dns.rdata.from_text(dns.rdataclass.IN, rdtype, text,
origin=origin, relativize=False)
digestable_wire = rdata.to_digestable(origin)
expected_wire = rdata.to_wire(origin=origin)
self.assertEqual(digestable_wire, expected_wire)
