# author: 阿辉枫情

import re

import struct

import socket

def IPSplitBlocks(minip, maxip):

    result = []

    JudgeIp = re.compile(r'^(25[0-5]|2[0-4]\d|1\d\d|[1-9]\d|\d)\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]\d|\d)\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]\d|\d)\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]\d|\d)$')

    Flage_min = JudgeIp.match(minip)

    Flage_max = JudgeIp.match(maxip)

    if Flage_min and Flage_max:

        minip_num = socket.ntohl(struct.unpack(

            "I", socket.inet_aton(str(minip)))[0])

        maxip_num = socket.ntohl(struct.unpack(

            "I", socket.inet_aton(str(maxip)))[0])

        if minip_num > maxip_num:

            print "Error:[%s,%s] IP address size is not legitimate" % (minip, maxip)

            exit()

        else:

            step = 2**(32 - subnet) - 1

            min_num = minip_num

            while True:

                max_num = min_num & (~step & 0xFFFFFFFF)

                max_num |= step & 0xFFFFFFFF

                if max_num >= maxip_num:

                    minip = socket.inet_ntoa(

                        struct.pack('I', socket.htonl(min_num)))

                    maxip = socket.inet_ntoa(

                        struct.pack('I', socket.htonl(maxip_num)))

                    result.append((minip, maxip))

                    break

                minip = socket.inet_ntoa(

                    struct.pack('I', socket.htonl(min_num)))

                maxip = socket.inet_ntoa(

                    struct.pack('I', socket.htonl(max_num)))

                result.append((minip, maxip))

                min_num = max_num + 1

    else:

        print "Error:[%s,%s] IP addresses are not legitimate!!!" % (minip, maxip)

        exit()

    return result

if __name__ == '__main__':

    subnet = 24

    print IPSplitBlocks("192.168.1.1","192.168.2.1",)