Method _fix

scapy/layers/inet.py:367–394

(self)

        self.size = size

    def _fix(self):
        # Pseudo-Random amount of options
        # Random ("NAME", fmt)
        rand_patterns = [
            random.choice(list(
                (opt, fmt) for opt, fmt in TCPOptions[0].values()
                if opt != 'EOL'
            ))
            for _ in range(self.size)
        ]
        rand_vals = []
        for oname, fmt in rand_patterns:
            if fmt is None:
                rand_vals.append((oname, b''))
            else:
                # Process the fmt arguments 1 by 1
                structs = re.findall(r"!?([bBhHiIlLqQfdpP]|\d+[spx])", fmt)
                rval = []
                for stru in structs:
                    stru = "!" + stru
                    if "s" in stru or "p" in stru:  # str / chr
                        v = bytes(RandBin(struct.calcsize(stru)))
                    else:  # int
                        _size = struct.calcsize(stru)
                        v = random.randint(0, 2 ** (8 * _size) - 1)
                    rval.append(v)
                rand_vals.append((oname, tuple(rval)))
        return rand_vals

    def __bytes__(self):
        return TCPOptionsField.i2m(None, None, self._fix())