def test_encode(self):
mac = parse('''
Frame(
Header(
preamble = 0b10101010*7,
start = 0b10101011,
destn = 010203040506x0,
source = 0708090a0b0cx0,
ethertype = 0800x0
),
Data(1/8,2/8,3/8,4/8),
CRC(234d0/4.)
)
''')
serial = simple_serialiser(mac, dispatch_table())
bs = serial.bytes()
for _index in range(7):
b = next(bs)
assert b == BitString.from_int('0b10101010').to_int(), b
b = next(bs)
assert b == BitString.from_int('0b10101011').to_int(), b
def test_match(self):
#basicConfig(level=DEBUG)
# first, define some test data - we'll use a simple definition
# language, but you could also construct this directly in Python
# (Frame, Header etc are auto-generated subclasses of Node).
mac = parse('''
Frame(
Header(
preamble = 0b10101010*7,
start = 0b10101011,
destn = 010203040506x0,
source = 0708090a0b0cx0,
ethertype = 0800x0
),
Data(1/8,2/8,3/8,4/8),
CRC(234d0/4.)
)
''')
# next, define a parser for the header structure
# this is mainly literal values, but we make the two addresses
# big-endian integers, which will be read from the data
# this looks very like "normal" lepl because it is - there's
# nothing in lepl that forces the data being parsed to be text.
preamble = ~Const('0b10101010')[7]
start = ~Const('0b10101011')
destn = BEnd(6.0) > 'destn'
source = BEnd(6.0) > 'source'
ethertype = ~Const('0800x0')
header = preamble & start & destn & source & ethertype > Node
# so, what do the test data look like?
# print(mac)
# Frame
# +- Header
# | +- preamble BitString(b'\xaa\xaa\xaa\xaa\xaa\xaa\xaa', 56, 0)
# | +- start BitString(b'\xab', 8, 0)
# | +- destn BitString(b'\x01\x02\x03\x04\x05\x06', 48, 0)
# | +- source BitString(b'\x07\x08\t\n\x0b\x0c', 48, 0)
# | `- ethertype BitString(b'\x08\x00', 16, 0)
# +- Data
# | +- BitString(b'\x01', 8, 0)
# | +- BitString(b'\x02', 8, 0)
# | +- BitString(b'\x03', 8, 0)
# | `- BitString(b'\x04', 8, 0)
# `- CRC
# `- BitString(b'\x00\x00\x00\xea', 32, 0)
# we can serialize that to a BitString
b = simple_serialiser(mac, dispatch_table())
assert str(b) == 'aaaaaaaaaaaaaaab123456789abc801234000eax0/240'
# and then we can parse it
header.config.no_full_first_match()
p = header.parse(b)[0]
# print(p)
# Node
# +- destn Int(1108152157446,48)
# `- source Int(7731092785932,48)
# the destination address
assert hex(p.destn[0]) == '0x10203040506'
# the source address
assert hex(p.source[0]) == '0x708090a0b0c'
def test_match(self):
#basicConfig(level=DEBUG)
# first, define some test data - we'll use a simple definition
# language, but you could also construct this directly in Python
# (Frame, Header etc are auto-generated subclasses of Node).
mac = parse('''
Frame(
Header(
preamble = 0b10101010*7,
start = 0b10101011,
destn = 010203040506x0,
source = 0708090a0b0cx0,
ethertype = 0800x0
),
Data(1/8,2/8,3/8,4/8),
CRC(234d0/4.)
)
''')
# next, define a parser for the header structure
# this is mainly literal values, but we make the two addresses
# big-endian integers, which will be read from the data
# this looks very like "normal" lepl because it is - there's
# nothing in lepl that forces the data being parsed to be text.
preamble = ~Const('0b10101010')[7]
start = ~Const('0b10101011')
destn = BEnd(6.0) > 'destn'
source = BEnd(6.0) > 'source'
ethertype = ~Const('0800x0')
header = preamble & start & destn & source & ethertype > Node
# so, what do the test data look like?
# print(mac)
# Frame
# +- Header
# | +- preamble BitString(b'\xaa\xaa\xaa\xaa\xaa\xaa\xaa', 56, 0)
# | +- start BitString(b'\xab', 8, 0)
# | +- destn BitString(b'\x01\x02\x03\x04\x05\x06', 48, 0)
# | +- source BitString(b'\x07\x08\t\n\x0b\x0c', 48, 0)
# | `- ethertype BitString(b'\x08\x00', 16, 0)
# +- Data
# | +- BitString(b'\x01', 8, 0)
# | +- BitString(b'\x02', 8, 0)
# | +- BitString(b'\x03', 8, 0)
# | `- BitString(b'\x04', 8, 0)
# `- CRC
# `- BitString(b'\x00\x00\x00\xea', 32, 0)
# we can serialize that to a BitString
b = simple_serialiser(mac, dispatch_table())
assert str(b) == 'aaaaaaaaaaaaaaab123456789abc801234000eax0/240'
# and then we can parse it
header.config.no_full_first_match()
p = header.parse(b)[0]
# print(p)
# Node
# +- destn Int(1108152157446,48)
# `- source Int(7731092785932,48)
# the destination address
assert hex(p.destn[0]) == '0x10203040506'
# the source address
assert hex(p.source[0]) == '0x708090a0b0c'