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simpacket.py
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simpacket.py
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from struct import unpack_from, pack
class SimPacket():
def __init__(self, packed_buffer, offset=0):
self.direct, self.ts_nano, self.iplen = unpack_from('cdH', packed_buffer, offset=offset)
self.packed_buffer = packed_buffer
self.offset = offset
self.lookup_key = None
self.update_key = None
def buf_slice(self, start, length):
# type: () -> string
return self.packed_buffer[self.offset + 18 + start:self.offset + 18 + start + length]
def ipsrc(self):
# type: () -> string
return self.buf_slice(0, 4)
def ipsrc8(self):
# type: () -> string
return self.buf_slice(0, 1)
def ipsrc16(self):
# type: () -> string
return self.buf_slice(0, 2)
def ipsrc24(self):
# type: () -> string
return self.buf_slice(0, 3)
def ipdst(self):
# type: () -> string
return self.buf_slice(4, 4)
def ipdst8(self):
# type: () -> string
return self.buf_slice(4, 1)
def ipdst16(self):
# type: () -> string
return self.buf_slice(4, 2)
def ipdst24(self):
# type: () -> string
return self.buf_slice(4, 3)
def proto(self):
# type: () -> string
return self.buf_slice(8, 2)
def sport(self):
# type: () -> string
return self.buf_slice(10, 2)
def dport(self):
# type: () -> string
return self.buf_slice(12, 2)