| Zack Williams | 3dfe6af | 2016-04-30 11:37:09 -0700 | [diff] [blame] | 1 | import hashlib |
| 2 | import netaddr |
| 3 | |
| 4 | def genmac(value, prefix='', length=12): |
| 5 | ''' |
| 6 | deterministically generates a "random" MAC with a configurable prefix |
| 7 | ''' |
| 8 | |
| 9 | # from: http://serverfault.com/questions/40712/what-range-of-mac-addresses-can-i-safely-use-for-my-virtual-machines |
| Zack Williams | 05c2172 | 2016-04-30 11:42:58 -0700 | [diff] [blame] | 10 | if prefix == '' : |
| Zack Williams | 3dfe6af | 2016-04-30 11:37:09 -0700 | [diff] [blame] | 11 | mac_prefix = "0ac04d" # random "cord"-esque |
| 12 | |
| 13 | # deterministically generate a value |
| 14 | h = hashlib.new('sha1') |
| 15 | h.update(value) |
| 16 | |
| 17 | # build/trim MAC |
| 18 | mac_string = (mac_prefix + h.hexdigest())[0:length] |
| 19 | |
| 20 | return netaddr.EUI(mac_string) |
| 21 | |
| 22 | class FilterModule(object): |
| 23 | ''' MAC generation filter ''' |
| 24 | filter_map = { |
| 25 | 'genmac': genmac, |
| 26 | } |
| 27 | |
| 28 | def filters(self): |
| 29 | return self.filter_map |