Obfuscate the output of `ip route` when reporting bugs

obfuscate-iproute.py

import re
import random

# let's say your iproute contains this as the output of `ip route`
iproute = '''
default dev ppp0 scope link 
10.167.0.1 via 10.167.0.168 dev tun-alpha 
10.167.0.168 dev tun-alpha proto kernel scope link src 10.167.0.237 
10.100.159.0/24 dev wg-theta proto kernel scope link src 10.100.159.179 
10.193.230.0/24 via 10.100.159.1 dev wg-theta 
10.153.1.0/24 dev enp2s0f0 proto kernel scope link src 10.153.1.1 metric 100 
10.153.179.0/24 dev lxdbr0 proto kernel scope link src 10.153.179.1 
133.159.238.101 dev ppp0 proto kernel scope link src 133.159.203.189 
169.254.0.0/16 dev wg-theta scope link metric 1000 
'''

ips = re.findall(r'\d+\.\d+\.\d+\.\d+', iproute) 
octets = set()
for ip in ips:
    for octet in ip.split('.'):
        octets.add(octet)

mapping = {}
for octet in octets:
    mapping[octet] = '{}'.format(random.randint(100,253))

# overwrite the ones we want to preserve, like private IP ranges
fixedmapping = {
    '10': '10',
    '192': '192',
    '168': '168',
    '0': '0',
    '169': '169',
    '254': '254',
    '1': '1'
}
for octet in fixedmapping.keys():
    mapping[octet] = fixedmapping[octet]

# now do these substitutions of octets inside the IP address strings themselves
ipmapping = {}
for ip in ips:
    ipmapping[ip] = '.'.join([mapping[octet] for octet in ip.split('.')])

# contains a mapping of things we want to change, like interface names
globalmapping = {
    'tun-alpha': 'tun0',
    'wg-theta': 'wg0'
}

# replace the IPs back in the original iproute string
for ip in ips:
    iproute = iproute.replace(ip, ipmapping[ip])
    
# obfuscate the global mapping
for s in globalmapping.keys():
    iproute = iproute.replace(s, globalmapping[s])

print(iproute)