Is checking if an IP is in a subnet doing network requests or local computing?

Question

I have a list of client IPs and a list of subnetworks like so:

ips = ['firstIP','secondIP',....]
subnets = ['subnet1', 'subnet2',.....]

My ultimate goal is to find which subnetwork has at least one client who belongs to it.
Using what I saw here I created this function:

def ip_in_network(ips, network):
    for ip in ips:
        if ipaddress.ip_address(ip) in ipaddress.ip_network(network):
            return True
    return False

lst = []
for network in subnets:
    if ip_in_network(ips, network):
        lst.append(network)

where ips is the list of ips that I have and network is an element from the list subnets.
Both my lists are very large and I would like to make this more efficient using parallel programing. I am contemplating between using the threading module and the multiprocessing module because I understand that one more suited for network bound problems and the other for CPU computations.

So my question is, is the line ipaddress.ip_address(ip) in ipaddress.ip_network(network) preforming some network requests or is it all running locally? I couldn't find out from the documatation. Thanks in advance!

Any recommendations to make this code more efficient are welcome — Ofek Glick, Sep 13 '21 at 13:40
ipaddress module does not need any network connection. Comparing adresses and subnet is just bit to bit comparaison. — Ptit Xav, Sep 13 '21 at 14:12
Thanks for the answer, How did you come to this conclusion? I could not find anything in the documentation about it — Ofek Glick, Sep 14 '21 at 06:50
In the source code there is no reference to socket or other network module. — Ptit Xav, Sep 14 '21 at 07:10

Is checking if an IP is in a subnet doing network requests or local computing?

0 Answers0