def __init__(self, data, tcp_total_length):
'''
data be the part of tcp
tcp_total_length = ip.total_length - ip_header_length
'''
self.source_port = int(data[:4], 16)
self.destination_port = int(data[4:8], 16)
self.sequence_number = int(data[8:16], 16)
self.acknowledgement_number = int(data[16:24], 16)
self.header_length = int(data[24], 16) * 4 # bytes
self.reserved = byte2bin(data[25:28])[:3]
self.flags = byte2bin(data[25:28])[3:]
# self.nonce = self.flags[0]
# self.cwr = self.flags[1]
# self.ecn = self.flags[2]
# self.urgent = self.flags[3]
# self.reset = self.flags[6]
# self.syn = self.flags[7]
# self.ack = self.flags[4]
# self.push = self.flags[5]
# self.fin = self.flags[8]
self.window_size_value = int(data[28:32], 16)
self.checksum = data[32:36]
self.urgent_pointer = data[36:40]
self.options = data[40:self.header_length * 2]
self.kind = []
self.segment_data_length = tcp_total_length - self.header_length
self.actual_data = b''
self.stream_index = self.source_port + self.destination_port
self.get_data(data)
if self.options:
self.get_options(self.options)
def __init__(self, header):
self.version = header[0]
self.traffic_class = '0x' + header[1:3]
self.differentiated_service_codepoint = int(
byte2bin(header[1:3])[:6], 2)
self.explicit_congestion_notification = int(
byte2bin(header[1:3])[6:], 2)
self.flow_label = '0x' + header[3:8]
self.payload_length = int(header[8:12], 16)
self.next_proto = Ipv6.next_proto_map[header[12:14]]
self.hop_limit = int(header[14:16], 16)
self.source = get_ipv6(header[16:48])
self.destination = get_ipv6(header[48:80])
def __init__(self, header):
self.version = header[0]
self.header_length = int(header[1], 16) * 4 # bytes
self.dsf = header[2:4]
self.total_length = int(header[4:8], 16) # bytes
self.identification = header[8:12]
self.flags = byte2bin(header[12:14])[:3]
self.fragment_offset = byte2bin(header[12:16])[3:]
self.time_to_live = header[16:18] # ttl
self.next_proto = Ipv4.next_proto_map[header[18:20]]
self.checksum = header[20:24]
self.source = get_ipv4(header[24:32])
self.destination = get_ipv4(header[32:40])
def __init__(self, header):
self.type = int(header[:2], 16)
self.code = int(header[2:4], 16)
self.checksum = header[4:8]
self.cur_hop_limit = int(header[8:10], 16)
self.flags = byte2bin(header[10:12])
self.router_lifetime = int(header[12:16], 16)
self.reachable_time = int(header[16:24], 16)
self.retrans_time = int(header[24:32], 16)
self.icmpv6_options = header[32:]
def __init__(self, header):
self.transaction_id = header[:4]
self.flags = byte2bin(header[4:8])
self.response = Dns.message_type[self.flags[0]]
self.questions = int(header[8:12], 16)
self.answer_rrs = int(header[12:16], 16)
self.authority_rrs = int(header[16:20], 16)
self.additional_rrs = int(header[20:24], 16)
if self.response == 'query':
self.query_name = hexstr2bytes(header[24:-8])
self.query_type = header[-8:-4]
self.query_class = header[-4:]
else:
self.answer_data = hexstr2bytes(header[24:])
def __init__(self, data, tcp_total_length):
'''
data be the part of tcp
tcp_total_length = ip.total_length - ip_header_length
'''
self.source_port = int(data[:4], 16)
self.destination_port = int(data[4:8], 16)
self.sequence_number = int(data[8:16], 16)
self.acknowledgement_number = int(data[16:24], 16)
self.header_length = int(data[24], 16) * 4 # bytes
self.flags = byte2bin(data[25:28])[3:]
self.syn = self.flags[7]
self.ack = self.flags[4]
self.push = self.flags[5]
self.fin = self.flags[8]
self.window_size_value = int(data[28:32], 16)
self.checksum = data[32:36]
self.urgent_pointer = data[36:40]
self.options = data[40:self.header_length * 2]
self.segment_data_length = tcp_total_length - self.header_length
self.actual_data = None
self.next_proto = None
self.stream_index = self.get_stream()
self.get_proto(data)