def _find_network_ip(network_name, reserved_ip_addresses, device=None):
"""Find the network and IP address to be used for deployment.
If ``device`` is specified, re-use an IP of that device that matches
the specified network. If no network is specified, any IP matches.
If no suitable network is found, ``Network.DoesNotExist`` is raised.
If no suitable IP address is found, "" is returned for the IP.
Never uses an IP that is in ``reserved_ip_addresses``. When an IP is
found, it is added to ``reserved_ip_addresses``.
"""
if network_name:
network = Network.objects.get(name=network_name)
if device:
for ipaddress in device.ipaddress_set.filter(
is_management=False,
network=network,
).order_by('hostname', 'address'):
ip = ipaddress.address
if ip in reserved_ip_addresses:
continue
reserved_ip_addresses.append(ip)
return network, ip
ip = get_first_free_ip(network.name, reserved_ip_addresses) or ''
if ip:
reserved_ip_addresses.append(ip)
return network, ip
if device:
for ipaddress in device.ipaddress_set.filter(
is_management=False, ).order_by('hostname', 'address'):
ip = ipaddress.address
if ip in reserved_ip_addresses:
continue
try:
network = Network.from_ip(ip)
except IndexError:
continue
reserved_ip_addresses.append(ip)
return network, ip
raise Network.DoesNotExist("No default network for this device")
