def test_should_build_IPv6Packet_with_ICMP_payload_from_well_know_values_when_to_bytes_method_is_called(self):
# GIVEN
ipv6_packet = IPv6Packet(IPv6Header(source_address="fd00:1234:4555::ff:fe00:1800",
destination_address="ff03::1"),
ICMPv6(ICMPv6Header(128, 0),
ICMPv6EchoBody(0, 2, bytearray([0x80, 0x00, 0xc7, 0xbf, 0x00, 0x00, 0x00, 0x01,
0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
0x41, 0x41]))),
[HopByHop(options=[
HopByHopOption(HopByHopOptionHeader(_type=0x6d),
MPLOption(S=1, M=0, V=0, sequence=2, seed_id=bytearray([0x00, 0x18])))
])])
# WHEN
ipv6_packet_bytes = ipv6_packet.to_bytes()
# THEN
expected_ipv6_packet_bytes = bytearray([0x60, 0x00, 0x00, 0x00, 0x00, 0x22, 0x00, 0x40,
0xfd, 0x00, 0x12, 0x34, 0x45, 0x55, 0x00, 0x00,
0x00, 0x00, 0x00, 0xff, 0xfe, 0x00, 0x18, 0x00,
0xff, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x3a, 0x00, 0x6d, 0x04, 0x40, 0x02, 0x00, 0x18,
0x80, 0x00, 0x87, 0x12, 0x00, 0x00, 0x00, 0x02,
0x80, 0x00, 0xc7, 0xbf, 0x00, 0x00, 0x00, 0x01,
0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
0x41, 0x41])
self.assertEqual(expected_ipv6_packet_bytes, ipv6_packet_bytes)
def test_should_return_proper_header_length_when_ICMPv6Header_object_is_called_in_len(self):
# GIVEN
icmpv6_header = ICMPv6Header(any_type(), any_code(), any_checksum())
# WHEN
icmpv6_header_length = len(icmpv6_header)
# THEN
self.assertEqual(4, icmpv6_header_length)
def test_should_create_ICMPv6Header_when_to_bytes_classmethod_is_called(self):
# GIVEN
_type = any_type()
code = any_code()
checksum = any_checksum()
data = bytearray([_type, code]) + struct.pack("!H", checksum)
# WHEN
icmpv6_header = ICMPv6Header.from_bytes(io.BytesIO(data))
# THEN
self.assertEqual(_type, icmpv6_header.type)
self.assertEqual(code, icmpv6_header.code)
self.assertEqual(checksum, icmpv6_header.checksum)
def test_should_create_ICMPv6Header_when_to_bytes_classmethod_is_called(self):
# GIVEN
_type = any_type()
code = any_code()
checksum = any_checksum()
data = bytearray([_type, code]) + struct.pack("!H", checksum)
# WHEN
icmpv6_header = ICMPv6Header.from_bytes(io.BytesIO(data))
# THEN
self.assertEqual(_type, icmpv6_header.type)
self.assertEqual(code, icmpv6_header.code)
self.assertEqual(checksum, icmpv6_header.checksum)
def test_should_convert_icmp_message_header_to_bytes_when_to_bytes_method_is_called(self):
# GIVEN
_type = any_type()
code = any_code()
checksum = any_checksum()
icmpv6_header = ICMPv6Header(_type, code, checksum)
# WHEN
data = icmpv6_header.to_bytes()
# THEN
self.assertEqual(_type, data[0])
self.assertEqual(code, data[1])
self.assertEqual(checksum, struct.unpack("!H", data[2:])[0])
def test_should_creates_bytes_from_ICMPv6Header_and_body_when_to_bytes_method_is_called(self):
# GIVEN
_type = any_type()
code = any_code()
checksum = any_checksum()
body = any_body()
icmpv6_header = ICMPv6Header(_type, code, checksum)
icmpv6_body = ICMPv6BytesBody(body)
icmpv6_msg = ICMPv6(icmpv6_header, icmpv6_body)
# WHEN
actual = icmpv6_msg.to_bytes()
# THEN
expected = bytearray([_type, code]) + struct.pack("!H", checksum) + body
self.assertEqual(expected, actual)
