def _make_prefix(self, chain, rule): prefix = ["chain:%s" % chain] _rule = rule.split(' ') while _rule: part = _rule.pop(0) if part.startswith('-'): part = part.lstrip('-') if prefix: prefix.append(';%s' % part) else: prefix.append('%s' % part) elif part == '!': prefix.append(';not') else: if (part == 'DROP' and prefix[-1] == ';j' or part == 'comment' and prefix[-1] == ';m'): prefix.pop(-1) return "".join(prefix) else: prefix.append('=%s' % part)