Ugly Function to flip ACE statements. (Usable to see if outbound has properly inverted statements.

aclFLip.py

import re


def flipACE(ace: str) -> list:
    search = r'(?:host \d+\.\d+\.\d+\.\d+|\d+\.\d+\.\d+\.\d+ \d+\.\d+\.\d+\.\d+|any)'
    endofline = r'(?:established|log-input|log|$)'
    remark = r'^ ?remark'
    if re.search(remark, ace):
        return ace.split()
    if re.search(' reflect ', ace):
        return '! should not be flipped reflexive'.split()
    end = re.search(endofline, ace)
    srcthendest = re.finditer(search, ace)
    source = srcthendest.__next__()
    destination = srcthendest.__next__()
    aceAction = slice(0, source.start())
    sourceAndPorts = slice(source.start(), destination.start())
    destinationAndPorts = slice(destination.start(), end.start())
    # sourceports = slice(source.end(), destination.start())
    # destinationports = slice(destination.end(), end.end())
    return [ace[aceAction].strip(),
            ace[destinationAndPorts].strip(),
            ace[sourceAndPorts].strip()
            ]