IP地址与十进制IP转换

#!/usr/bin/env python

#encoding=utf-8

import re

import sys

import os

def ten_to_two(ten_num):

two_str = ''

while ten_num != 1:

a = ten_num % 2

two_str = two_str + str(a)

ten_num = ten_num / 2

else:

two_str = two_str + str(1)

two_str = two_str[::-1]

if len(two_str) < 8:

cover = (8 - len(two_str)) * str(0)

two_str = cover + two_str

return two_str

def two_to_ten(two_num):

ten_int = 0

indexlist = range(len(two_num))

for i in indexlist:

ten_int += int(two_num[i]) * 2 ** indexlist[-(i+1)]

return str(ten_int)

def int_to_ipaddr(intnum):

int_addr = int(intnum)

twonum = ten_to_two(int_addr)

if len(twonum) < 32:

twonum = '0' * (32 - len(twonum)) + twonum

ipaddr = ''

for j in range(0, 32, 8):

k = j + 8

if j == 24:

ipaddr += two_to_ten(twonum[j:k])

else:

ipaddr += two_to_ten(twonum[j:k]) + '.'

return ipaddr

def ipaddr_to_int(ipaddress):

iplist = ipaddress.split('.')

ipstr = ''

for i in iplist:

ipstr += ten_to_two (int(i))

if ipstr.startswith('0'):

ipstr = re.sub('^0*', '', ipstr)

tennum = two_to_ten(ipstr)

return tennum

if len(sys.argv) < 2:

print 'No action specified.'

sys.exit()

elif len(sys.argv) == 2:

if sys.argv[1].startswith('--'):

option = sys.argv[1][2:]

if option == 'version':

print 'Version 1.1'

elif option == 'help':

print '''\

This program is used to convert the IP address.

\t-i ipaddress\n\t\tConvert the IP address.

\t\tlike ./iptrans.py 192.168.1.1

\t-if filename\n\t\tConvert the IP address's file.

\t\tlike ./iptrans.py ./ipfile

\t-t int ipaddress\n\t\tConvert the int IP address.

\t\tlike ./iptrans.py 3232235777

\t-tf filename\n\t\tConvert the IP address's file.

\t\tlike ./iptrans.py ./intipfile

\t--help\n\t\tDisplay this help.

\t--version\n\t\tPrints the version number.'''

else:

print 'Unknown option.'

sys.exit()

elif len(sys.argv) == 3:

if sys.argv[1].startswith('-'):

option = sys.argv[1][1:]

if option == 'i':

if sys.argv[2].count('.') == 3:

ipaddress = sys.argv[2]

intkey = ipaddr_to_int(ipaddress)

print '%s\t%s' % (ipaddress, intkey)

else:

print '%s is error.' % sys.argv[2]

sys.exit()

elif option == 'if':

if os.path.isfile(sys.argv[2]) == True:

filename = sys.argv[2]

f = open(filename, 'r')

for line in f:

ipaddress = line.replace('\n', '')

intkey = ipaddr_to_int(ipaddress)

print '%s\t%s' % (ipaddress, intkey)

else:

print 'The %s is not exist.' % sys.argv[2]

sys.exit()

elif option == 't':

intkey = sys.argv[2]

if int(intkey) < 16777217:

print '%s is error, must be great than 16777217' % sys.argv[2]

else:

ipaddress = int_to_ipaddr(intkey)

print '%s\t%s' % (intkey, ipaddress)

elif option == 'tf':

if os.path.isfile(sys.argv[2]) == True:

filename = sys.argv[2]

f = open(filename, 'r')

for line in f:

intkey = line.replace('\n', '')

ipaddress = int_to_ipaddr(intkey)

print '%s\t%s' % (intkey, ipaddress)

else:

print 'The %s is not exist.' % sys.argv[2]

sys.exit()

else:

print 'Unknown option.'

sys.exit()

else:

print 'Unknown option.'

sys.exit()