python mac address calculation

The idea is 10/16 convert hex and string handling

Start-create the wheel

 

1, determines whether the address mac

Regular matches eligibility

1 import re
2 
3 def isMac(string):
4     preg = re.compile('^([a-fA-F0-9]{2}:){5}[a-fA-F0-9]{2}$')
5     ret = preg.match(string)
6     if ret is None:
7         return False
8     else:
9         return True

 

2, mac turn int

Replace the colon turn hex

1 def macToInt(mac):
2     mac = mac.replace(":", "")
3     return int(mac, 16)

 

3, int turn mac 

After hexadecimal be back to fill the seats and fill colon

. 1  DEF intToMac (intMac):
 2  　 # MAC address of each segment are less than two digits 0s example: F: 23 is: 54 is => 0F: 23 is: 54 is 
. 3      IF len (hex (intMac))% 2 =! 0 :
 . 4          hexStr = ' 0 {0: X-} ' .format (intMac)
 . 5      the else :
 . 6          hexStr = ' {0: X-} ' .format (intMac)
 . 7  
. 8      I = 0
 . 9      RET = "" 
10  
. 11      the while I < len = (hexStr) - 2 :
 12 is          IF RET == "" :
 13 is             ret = hexStr[i:(i + 2)]
14         else:
15             ret = "".join([ret, ":", hexStr[i:(i + 2)]])
16         i = i + 2
17     return ret

 

4, Get next n mac

After transfection into numerical calculation int

1  Def getNextMac (macAddr, n):
 2      return intToMac (macToInt (macAddr) + n)

 

5, obtaining the n mac

After transfection into numerical calculation int

1  Def backOldMac (macAddr, n):
 2      return intToMac (macToInt (macAddr) - n)

 

6, mac address comparison

Comparing a value converted to an int

1  DEF compareMac (macA, out):
 2      return macToInt (macA)> = macToInt (out)

 

7, mac address calculating the number of

After subtraction to int

1 def calcMacNum(mac_start, mac_end):
2     mac_start = mac_start.upper()
3 　　 mac_end = mac_end.upper()
4 　　 ret = macToInt(mac_end) - macToInt(mac_start) + 1 
5     if ret < 0: 
6        ret = 0 
7 return ret

 

8, reverse mac address

Reverse order of the mac address, after removal of the colon and then added back to the inverting string colon

1 def macReverse(mac):
2     info = mac.split(":")
3     info.reverse()
4     return ":".join(info)