get_spf_ip.py

#!/usr/bin/env python3

import ipaddress

from SPF2IP import SPF2IP

ignore_list = set({'127.0.0.1/32'})

ignore_list.update({  # Microsoft O365
    '40.92.0.0/15',
    '40.107.0.0/16',
    '52.100.0.0/14',
    '104.47.0.0/17'
})


add_list = {
    '127.0.0.2/32'
}

result = set()

for item in add_list:
    result.add(item)


with open('domains.csv', 'r') as f:
    lines = f.read().splitlines()

for line in lines:
    try:
        lookup = SPF2IP(line)
        for r in lookup.IPArray('4'):
            if r not in ignore_list:                
                result.add(r)

    # TODO(frennkie) this is pretty "broad"
    except Exception as e:
        print(f"[WARN] {line}: {e}")

total = 0
for item in result:
    ia = ipaddress.IPv4Network(item)
    total += ia.num_addresses

        
print("[INFO] ===")
print(f"[INFO] Total number of Ranges: {len(result)}")
print(f"[INFO] Total number of IPs: {total}")