def test(self, in_cksum):
inst = SCIONUDPHeader()
inst._dst = create_mock_full(
{
"isd_as": create_mock_full({"pack()": b"dsIA"}),
"host": create_mock_full({"pack()": b"dstH"}),
},
class_=SCIONAddr)
inst._src = create_mock_full(
{
"isd_as": create_mock_full({"pack()": b"srIA"}),
"host": create_mock_full({"pack()": b"srcH"}),
},
class_=SCIONAddr)
inst.pack = create_mock_full(return_value=b"packed with null checksum")
payload = b"payload"
expected_call = b"".join([
b"dsIA",
b"srIA",
b"dstH",
b"srcH",
b"\x00",
bytes([L4Proto.UDP]),
b"packed with null checksum",
payload,
])
in_cksum.return_value = 0x3412
# Call
ntools.eq_(inst._calc_checksum(payload), bytes.fromhex("3412"))
# Tests
in_cksum.assert_called_once_with(expected_call)
def test_bad_checksum(self, raw):
inst = SCIONUDPHeader()
inst.total_len = 10 + inst.LEN
inst._calc_checksum = create_mock()
inst._calc_checksum.return_value = bytes.fromhex("8888")
inst._checksum = bytes.fromhex("9999")
# Call
ntools.assert_raises(SCIONChecksumFailed, inst.validate, range(10))
def parse_l4_hdr(proto, data, dst=None, src=None):
if proto == L4Proto.UDP:
raw_hdr = data.pop(SCIONUDPHeader.LEN)
assert src
assert dst
return SCIONUDPHeader((src, dst, raw_hdr))
if proto == L4Proto.SCMP:
raw_hdr = data.pop(SCMPHeader.LEN)
return SCMPHeader((src, dst, raw_hdr))
if proto in L4Proto.L4:
return None
raise SCIONParseError("Unsupported L4 protocol type: %s" % proto)
def test(self):
inst = SCIONUDPHeader()
inst._src = "src addr"
inst._dst = "dst addr"
inst.src_port = "src port"
inst.dst_port = "dst port"
# Call
inst.reverse()
# Tests
ntools.eq_(inst._src, "dst addr")
ntools.eq_(inst._dst, "src addr")
ntools.eq_(inst.src_port, "dst port")
ntools.eq_(inst.dst_port, "src port")
def test(self, raw):
inst = SCIONUDPHeader()
data = create_mock(["pop"])
data.pop.return_value = bytes.fromhex("11112222000f9999")
raw.return_value = data
# Call
inst._parse("src", "dst", "raw")
# Tests
raw.assert_called_once_with("raw", inst.NAME, inst.LEN)
ntools.eq_(inst._src, "src")
ntools.eq_(inst._dst, "dst")
ntools.eq_(inst.src_port, 0x1111)
ntools.eq_(inst.dst_port, 0x2222)
ntools.eq_(inst.total_len, 0x000F)
ntools.eq_(inst._checksum, bytes.fromhex("9999"))
def test(self, scapy_checksum):
inst = SCIONUDPHeader()
inst._src = create_mock(["pack"], class_=SCIONAddr)
inst._src.pack.return_value = b"source address"
inst._dst = create_mock(["pack"], class_=SCIONAddr)
inst._dst.pack.return_value = b"destination address"
inst.pack = create_mock()
inst.pack.return_value = b"packed with null checksum"
payload = b"payload"
expected_call = b"".join([
b"source address", b"destination address", bytes([L4Proto.UDP]),
b"packed with null checksum", payload,
])
scapy_checksum.return_value = 0x3412
# Call
ntools.eq_(inst._calc_checksum(payload), bytes.fromhex("1234"))
# Tests
scapy_checksum.assert_called_once_with(expected_call)
def test_bad_length(self, raw):
inst = SCIONUDPHeader()
inst.total_len = 10
# Call
ntools.assert_raises(SCMPBadPktLen, inst.validate, range(9))
