def split_subnet(network: IPv4Network, netmask: IPv4Address) -> list:
"""Splits an IPv4 network into a list of subnets according to given netmask.
Args:
network: IPv4 network that will be splitted.
netmask: Netmask that resulted subnets will have.
Returns:
Resulted subnets listing.
Raises:
ValueError: When netmask given is invalid or smaller than the source network.
"""
if network.netmask > netmask:
raise ValueError(
'Impossible splitting to a invalid netmask ou smaller than itself')
if network.netmask == netmask:
return [network]
else:
branches = list(network.subnets())
return split_subnet(branches[0], netmask) + split_subnet(
branches[1], netmask)
async def get_subnet_chunks(size: int,
network: ipaddress.IPv4Network) -> list:
"""Class coroutine to break a large subnet into smaller chunks for processing"""
return list(network.subnets(prefixlen_diff=size))
