python子网拆分IP段

# 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|1dd|[1-9]d|d).(25[0-5]|2[0-4]d|1dd|[1-9]d|d).(25[0-5]|2[0-4]d|1dd|[1-9]d|d).(25[0-5]|2[0-4]d|1dd|[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",)