62 lines
1.6 KiB
Python
62 lines
1.6 KiB
Python
import subprocess as sp
|
|
import random
|
|
import logging
|
|
import socket
|
|
from contextlib import closing
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
def random_bytes(num=6):
|
|
return [random.randrange(256) for _ in range(num)]
|
|
|
|
|
|
def generate_mac(uaa=False, multicast=False, oui=None, separator=':', byte_fmt='%02x'):
|
|
mac = random_bytes()
|
|
if oui:
|
|
if type(oui) == str:
|
|
oui = [int(chunk) for chunk in oui.split(separator)]
|
|
mac = oui + random_bytes(num=6 - len(oui))
|
|
else:
|
|
if multicast:
|
|
mac[0] |= 1 # set bit 0
|
|
else:
|
|
mac[0] &= ~1 # clear bit 0
|
|
if uaa:
|
|
mac[0] &= ~(1 << 1) # clear bit 1
|
|
else:
|
|
mac[0] |= 1 << 1 # set bit 1
|
|
return separator.join(byte_fmt % b for b in mac)
|
|
|
|
|
|
def create_dev(script, _id, dev, ip=None):
|
|
command = [script, str(_id), dev]
|
|
if ip:
|
|
command.append(ip)
|
|
try:
|
|
output = sp.check_output(command, stderr=sp.PIPE)
|
|
except Exception as e:
|
|
logger.exception('Creation of interface %s failed.', dev)
|
|
print(e)
|
|
return None
|
|
else:
|
|
return output.decode('utf-8').strip()
|
|
|
|
|
|
def delete_network_interface(iface):
|
|
try:
|
|
sp.check_output(['ip', 'link', 'del', iface])
|
|
except Exception:
|
|
logger.exception('Interface Deletion failed')
|
|
|
|
|
|
def find_free_port():
|
|
with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s:
|
|
try:
|
|
s.bind(('', 0))
|
|
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
|
|
except Exception:
|
|
return None
|
|
else:
|
|
return s.getsockname()[1]
|