Incompatible with Python3

[OmriBaso]

This part of code, basicly the struct parts and not functioning correctly, if you help me with that i will share with you also a private project of mine, i mannged to use your code to make reverse Socks5 proxy server using ICMP.

BUT i need to work in python3 since my code is in python3, im not able to figure out the logic of what you did there i port it my self, please help :)

Thanks in advance

    def create(self):
        pack_str = "!BBHHH4sH"
        pack_args = [self.type, self.code, 0, self.id, self.sequence,
                     socket.inet_aton(self.dest[0]), self.dest[1]]

        if self.length:
            pack_str += "{}s".format(self.length)
            pack_args.append(self.data)

        self.checksum = self._checksum(struct.pack(pack_str, *pack_args)) 
        pack_args[2] = self.checksum
        return struct.pack(pack_str, *pack_args)