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-rwxr-xr-xpython/vyos/ifconfig/interface.py23
1 files changed, 16 insertions, 7 deletions
diff --git a/python/vyos/ifconfig/interface.py b/python/vyos/ifconfig/interface.py
index 4e881ad66..9b9d982d1 100755
--- a/python/vyos/ifconfig/interface.py
+++ b/python/vyos/ifconfig/interface.py
@@ -27,8 +27,6 @@ from netifaces import ifaddresses
# this is not the same as socket.AF_INET/INET6
from netifaces import AF_INET
from netifaces import AF_INET6
-from uuid import uuid3
-from uuid import NAMESPACE_DNS
from vyos import ConfigError
from vyos.configdict import list_diff
@@ -459,11 +457,22 @@ class Interface(Control):
>>> Interface('eth0').get_mac()
'00:50:ab:cd:ef:00'
"""
- # calculate a UUID based on the interface name - this is as predictable
- # as an interface MAC address and thus can be used in the same way
- tmp = uuid3(NAMESPACE_DNS, self.ifname)
- # take the last 48 bits from the UUID string
- tmp = str(tmp).split('-')[-1]
+ from hashlib import sha256
+
+ # Get processor ID number
+ cpu_id = self._cmd('sudo dmidecode -t 4 | grep ID | head -n1 | sed "s/.*ID://;s/ //g"')
+ # Get system eth0 base MAC address - every system has eth0
+ eth0_mac = Interface('eth0').get_mac()
+
+ sha = sha256()
+ # Calculate SHA256 sum based on the CPU ID number, eth0 mac address and
+ # this interface identifier - this is as predictable as an interface
+ # MAC address and thus can be used in the same way
+ sha.update(cpu_id.encode())
+ sha.update(eth0_mac.encode())
+ sha.update(self.ifname.encode())
+ # take the most significant 48 bits from the SHA256 string
+ tmp = sha.hexdigest()[:12]
# Convert pseudo random string into EUI format which now represents a
# MAC address
tmp = EUI(tmp).value