auth_chain.py 文件源码

def rnd_data_len(self, buf_size, last_hash, random):
        if buf_size >= 1440:
            return 0
        random.init_from_bin_len(last_hash, buf_size)
        pos = bisect.bisect_left(self.data_size_list, buf_size + self.server_info.overhead)
        final_pos = pos + random.next() % (len(self.data_size_list))
        if final_pos < len(self.data_size_list):
            return self.data_size_list[final_pos] - buf_size - self.server_info.overhead

        pos = bisect.bisect_left(self.data_size_list2, buf_size + self.server_info.overhead)
        final_pos = pos + random.next() % (len(self.data_size_list2))
        if final_pos < len(self.data_size_list2):
            return self.data_size_list2[final_pos] - buf_size - self.server_info.overhead
        if final_pos < pos + len(self.data_size_list2) - 1:
            return 0

        if buf_size > 1300:
            return random.next() % 31
        if buf_size > 900:
            return random.next() % 127
        if buf_size > 400:
            return random.next() % 521
        return random.next() % 1021