def load_from(self,
buffer: bytes,
offset: int = 0,
length: int = None) -> int:
"""
Load the internal state of this object from the given buffer. The buffer may contain more data after the
structured element is parsed. This data is ignored.
:param buffer: The buffer to read data from
:param offset: The offset in the buffer where to start reading
:param length: The amount of data we are allowed to read from the buffer
:return: The number of bytes used from the buffer
"""
my_offset, option_len = self.parse_option_header(buffer,
offset,
length,
min_length=4)
header_offset = my_offset
# Parse the domain label
max_offset = option_len + header_offset # The option_len field counts bytes *after* the header fields
name_len, self.fqdn = parse_domain_bytes(buffer,
offset=offset + my_offset,
length=option_len)
my_offset += name_len
if my_offset != max_offset:
raise ValueError(
'Option length does not match the length of the included fqdn')
return my_offset
def load_from(self, buffer: bytes, offset: int = 0, length: int = None) -> int:
"""
Load the internal state of this object from the given buffer. The buffer may contain more data after the
structured element is parsed. This data is ignored.
:param buffer: The buffer to read data from
:param offset: The offset in the buffer where to start reading
:param length: The amount of data we are allowed to read from the buffer
:return: The number of bytes used from the buffer
"""
my_offset, suboption_len = self.parse_suboption_header(buffer, offset, length)
header_offset = my_offset
# Parse the domain labels
max_offset = suboption_len + header_offset # The option_len field counts bytes *after* the header fields
domain_name_len, self.fqdn = parse_domain_bytes(buffer, offset=offset + my_offset, length=suboption_len)
my_offset += domain_name_len
if my_offset != max_offset:
raise ValueError('Option length does not match the length of the included fqdn')
return my_offset
def test_parse_idn(self):
offset, domain_name = parse_domain_bytes(self.idn_domain_bytes)
self.assertEqual(offset, len(self.idn_domain_bytes))
self.assertEqual(domain_name, self.idn_domain_name)
def test_parse_relative(self):
offset, domain_name = parse_domain_bytes(self.good_relative_domain_bytes, allow_relative=True)
self.assertEqual(offset, len(self.good_relative_domain_bytes))
self.assertEqual(domain_name, self.good_relative_domain_name)
def test_parse_relative(self):
offset, domain_name = parse_domain_bytes(self.good_relative_domain_bytes, allow_relative=True)
self.assertEqual(offset, len(self.good_relative_domain_bytes))
self.assertEqual(domain_name, self.good_domain_name)
def test_parse_good(self):
offset, domain_name = parse_domain_bytes(self.good_domain_bytes)
self.assertEqual(offset, len(self.good_domain_bytes))
self.assertEqual(domain_name, self.good_domain_name)
