def test_pack_tsresol():
assert pack_timestamp_resolution(10, 0b00000000) == bytes((0b00000000, ))
assert pack_timestamp_resolution(10, 0b00000011) == bytes((0b00000011, ))
assert pack_timestamp_resolution(10, 0b00000100) == bytes((0b00000100, ))
assert pack_timestamp_resolution(10, 0b00111100) == bytes((0b00111100, ))
assert pack_timestamp_resolution(2, 0b00000000) == bytes((0b10000000, ))
assert pack_timestamp_resolution(2, 0b00000011) == bytes((0b10000011, ))
assert pack_timestamp_resolution(2, 0b00000100) == bytes((0b10000100, ))
assert pack_timestamp_resolution(2, 0b00111100) == bytes((0b10111100, ))
def test_pack_tsresol():
assert pack_timestamp_resolution(10, 0b00000000) == int2byte(0b00000000)
assert pack_timestamp_resolution(10, 0b00000011) == int2byte(0b00000011)
assert pack_timestamp_resolution(10, 0b00000100) == int2byte(0b00000100)
assert pack_timestamp_resolution(10, 0b00111100) == int2byte(0b00111100)
assert pack_timestamp_resolution(2, 0b00000000) == int2byte(0b10000000)
assert pack_timestamp_resolution(2, 0b00000011) == int2byte(0b10000011)
assert pack_timestamp_resolution(2, 0b00000100) == int2byte(0b10000100)
assert pack_timestamp_resolution(2, 0b00111100) == int2byte(0b10111100)
def test_pack_tsresol():
assert pack_timestamp_resolution(10, 0b00000000) == int2byte(0b00000000)
assert pack_timestamp_resolution(10, 0b00000011) == int2byte(0b00000011)
assert pack_timestamp_resolution(10, 0b00000100) == int2byte(0b00000100)
assert pack_timestamp_resolution(10, 0b00111100) == int2byte(0b00111100)
assert pack_timestamp_resolution(2, 0b00000000) == int2byte(0b10000000)
assert pack_timestamp_resolution(2, 0b00000011) == int2byte(0b10000011)
assert pack_timestamp_resolution(2, 0b00000100) == int2byte(0b10000100)
assert pack_timestamp_resolution(2, 0b00111100) == int2byte(0b10111100)
def _generate_file_with_tsresol(base, exponent):
tsresol = pack_timestamp_resolution(base, exponent)
base_timestamp = 1420070400.0 # 2015-01-01 00:00 UTC
timestamp = base_timestamp / (base**exponent)
stream = io.BytesIO()
# ---------- Section header
stream.write(b"\x0a\x0d\x0d\x0a") # Magic number
stream.write(b"\x00\x00\x00\x20") # Block size (32 bytes)
stream.write(b"\x1a\x2b\x3c\x4d") # Magic number
stream.write(b"\x00\x01\x00\x00") # Version
stream.write(b"\xff\xff\xff\xff\xff\xff\xff\xff") # Undefined length
stream.write(b"\x00\x00\x00\x00") # Empty options
stream.write(b"\x00\x00\x00\x20") # Block size (32 bytes)
# ---------- Interface description
stream.write(b"\x00\x00\x00\x01") # block magic
stream.write(b"\x00\x00\x00\x20") # block syze
stream.write(b"\x00\x01") # link type
stream.write(b"\x00\x00") # reserved block
stream.write(b"\x00\x00\xff\xff") # size limit
stream.write(b"\x00\x09\x00\x01")
stream.write(tsresol)
stream.write(b"\x00\x00\x00") # if_tsresol (+padding)
stream.write(b"\x00\x00\x00\x00") # end of options
stream.write(b"\x00\x00\x00\x20") # block syze
# ---------- Enhanced packet
stream.write(b"\x00\x00\x00\x06") # block magic
stream.write(b"\x00\x00\x00\x24") # block syze
stream.write(b"\x00\x00\x00\x00") # interface id (first one, eth0)
stream.write(struct.pack(">Q", int(timestamp))) # timestamp
stream.write(b"\x00\x00\x00\x00") # Captured length
stream.write(b"\x00\x00\x00\x00") # Original length
# no packet data
stream.write(b"\x00\x00\x00\x00") # Empty options
stream.write(b"\x00\x00\x00\x24") # block syze
return stream.getvalue()
def _generate_file_with_tsresol(base, exponent):
tsresol = pack_timestamp_resolution(base, exponent)
base_timestamp = 1420070400.0 # 2015-01-01 00:00 UTC
timestamp = base_timestamp / (base ** exponent)
stream = io.BytesIO()
# ---------- Section header
stream.write(b"\x0a\x0d\x0d\x0a") # Magic number
stream.write(b"\x00\x00\x00\x20") # Block size (32 bytes)
stream.write(b"\x1a\x2b\x3c\x4d") # Magic number
stream.write(b"\x00\x01\x00\x00") # Version
stream.write(b"\xff\xff\xff\xff\xff\xff\xff\xff") # Undefined length
stream.write(b"\x00\x00\x00\x00") # Empty options
stream.write(b"\x00\x00\x00\x20") # Block size (32 bytes)
# ---------- Interface description
stream.write(b'\x00\x00\x00\x01') # block magic
stream.write(b'\x00\x00\x00\x20') # block syze
stream.write(b'\x00\x01') # link type
stream.write(b'\x00\x00') # reserved block
stream.write(b'\x00\x00\xff\xff') # size limit
stream.write(b'\x00\x09\x00\x01')
stream.write(tsresol)
stream.write(b'\x00\x00\x00') # if_tsresol (+padding)
stream.write(b'\x00\x00\x00\x00') # end of options
stream.write(b'\x00\x00\x00\x20') # block syze
# ---------- Enhanced packet
stream.write(b'\x00\x00\x00\x06') # block magic
stream.write(b'\x00\x00\x00\x24') # block syze
stream.write(b'\x00\x00\x00\x00') # interface id (first one, eth0)
stream.write(struct.pack('>Q', int(timestamp))) # timestamp
stream.write(b'\x00\x00\x00\x00') # Captured length
stream.write(b'\x00\x00\x00\x00') # Original length
# no packet data
stream.write(b'\x00\x00\x00\x00') # Empty options
stream.write(b'\x00\x00\x00\x24') # block syze
return stream.getvalue()
def _generate_file_with_tsresol(base, exponent):
tsresol = pack_timestamp_resolution(base, exponent)
base_timestamp = 1420070400.0 # 2015-01-01 00:00 UTC
timestamp = base_timestamp / (base**exponent)
data = (
# ---------- Section header
"\x0a\x0d\x0d\x0a" # Magic number
"\x00\x00\x00\x20" # Block size (32 bytes)
"\x1a\x2b\x3c\x4d" # Magic number
"\x00\x01\x00\x00" # Version
"\xff\xff\xff\xff\xff\xff\xff\xff" # Undefined section length
"\x00\x00\x00\x00" # Empty options
"\x00\x00\x00\x20" # Block size (32 bytes)
# ---------- Interface description
'\x00\x00\x00\x01' # block magic
'\x00\x00\x00\x20' # block syze
'\x00\x01' # link type
'\x00\x00' # reserved block
'\x00\x00\xff\xff' # size limit
'\x00\x09\x00\x01'
'{tsresol}\x00\x00\x00' # if_tsresol (+padding)
'\x00\x00\x00\x00' # end of options
'\x00\x00\x00\x20' # block syze
# ---------- Enhanced packet
'\x00\x00\x00\x06' # block magic
'\x00\x00\x00\x24' # block syze
'\x00\x00\x00\x00' # interface id (first one, eth0)
'{timestamp}' # timestamp
'\x00\x00\x00\x00' # Captured length
'\x00\x00\x00\x00' # Original length
# no packet data
'\x00\x00\x00\x00' # Empty options
'\x00\x00\x00\x24' # block syze
).format(timestamp=struct.pack('>Q', timestamp), tsresol=tsresol)
return data
def _generate_file_with_tsresol(base, exponent):
tsresol = pack_timestamp_resolution(base, exponent)
base_timestamp = 1420070400.0 # 2015-01-01 00:00 UTC
timestamp = base_timestamp / (base ** exponent)
data = (
# ---------- Section header
"\x0a\x0d\x0d\x0a" # Magic number
"\x00\x00\x00\x20" # Block size (32 bytes)
"\x1a\x2b\x3c\x4d" # Magic number
"\x00\x01\x00\x00" # Version
"\xff\xff\xff\xff\xff\xff\xff\xff" # Undefined section length
"\x00\x00\x00\x00" # Empty options
"\x00\x00\x00\x20" # Block size (32 bytes)
# ---------- Interface description
'\x00\x00\x00\x01' # block magic
'\x00\x00\x00\x20' # block syze
'\x00\x01' # link type
'\x00\x00' # reserved block
'\x00\x00\xff\xff' # size limit
'\x00\x09\x00\x01''{tsresol}\x00\x00\x00' # if_tsresol (+padding)
'\x00\x00\x00\x00' # end of options
'\x00\x00\x00\x20' # block syze
# ---------- Enhanced packet
'\x00\x00\x00\x06' # block magic
'\x00\x00\x00\x24' # block syze
'\x00\x00\x00\x00' # interface id (first one, eth0)
'{timestamp}' # timestamp
'\x00\x00\x00\x00' # Captured length
'\x00\x00\x00\x00' # Original length
# no packet data
'\x00\x00\x00\x00' # Empty options
'\x00\x00\x00\x24' # block syze
).format(timestamp=struct.pack('>Q', timestamp), tsresol=tsresol)
return data
def test_read_block_enhanced_packet_tsresol_bigendian(tsr_base, tsr_exp):
data = _generate_file_with_tsresol(tsr_base, tsr_exp)
scanner = FileScanner(io.BytesIO(data))
blocks = list(scanner)
assert len(blocks) == 3
assert isinstance(blocks[0], SectionHeader)
assert blocks[0].endianness == ">"
assert blocks[0].interfaces == {0: blocks[1]}
assert isinstance(blocks[1], InterfaceDescription)
assert len(blocks[1].options) == 1 # Just if_tsresol
assert blocks[1].options["if_tsresol"] == pack_timestamp_resolution(
tsr_base, tsr_exp)
assert isinstance(blocks[2], EnhancedPacket)
assert blocks[2].section == blocks[0]
assert blocks[2].interface_id == 0
assert blocks[2].interface == blocks[1]
resol = tsr_base**tsr_exp
assert blocks[2].timestamp_resolution == resol
assert blocks[2].timestamp == 1420070400.0
def test_read_block_enhanced_packet_tsresol_bigendian(tsr_base, tsr_exp):
data = _generate_file_with_tsresol(tsr_base, tsr_exp)
scanner = FileScanner(io.BytesIO(data))
blocks = list(scanner)
assert len(blocks) == 3
assert isinstance(blocks[0], SectionHeader)
assert blocks[0].endianness == '>'
assert blocks[0].interfaces == {0: blocks[1]}
assert isinstance(blocks[1], InterfaceDescription)
assert len(blocks[1].options) == 1 # Just if_tsresol
assert blocks[1].options['if_tsresol'] == \
pack_timestamp_resolution(tsr_base, tsr_exp)
assert isinstance(blocks[2], EnhancedPacket)
assert blocks[2].section == blocks[0]
assert blocks[2].interface_id == 0
assert blocks[2].interface == blocks[1]
resol = tsr_base ** tsr_exp
assert blocks[2].timestamp_resolution == resol
assert blocks[2].timestamp == 1420070400.0