From 86c7a00b5b7f45ca22906019b7de2e87ab354eb7 Mon Sep 17 00:00:00 2001
From: lare <lare@lare.cc>
Date: Sun, 12 Feb 2023 00:26:37 +0100
Subject: [PATCH] add support for /16,/8 + show critical error if 'dnspython'
 isn't installed

---
 validate-my-dns.py | 28 +++++++++++++++++++---------
 1 file changed, 19 insertions(+), 9 deletions(-)

diff --git a/validate-my-dns.py b/validate-my-dns.py
index 7ef5b8a..723c2a5 100644
--- a/validate-my-dns.py
+++ b/validate-my-dns.py
@@ -8,12 +8,18 @@ import os
 import subprocess
 import json
 
-import dns.name
-import dns.query
-import dns.dnssec
-import dns.message
-import dns.resolver
-import dns.rdatatype
+try:
+    import dns.name
+    import dns.query
+    import dns.dnssec
+    import dns.message
+    import dns.resolver
+    import dns.rdatatype
+except ImportError:
+    print()
+    print("CRITICAL: this script requires the 'dnspython' libary, please install it using `python3 -m pip install dnspython`")
+    print()
+    exit(1)
 
 # import errors so they could be try/catched
 import dns.exception
@@ -79,11 +85,15 @@ def get_domain_by_mntner(mntner):
                     line = line[20:]
                     _domain_name = ".".join(
                         line.split(".")[::-1]) + ".in-addr.arpa"
-                    if int(line.split("/")[1]) ==24:
-                        _domain_name.replace("/24", "")
+                    if int(line.split("/")[1]) == 24:
+                        _domain_name = _domain_name.replace("0/24.", "")
+                    elif int(line.split("/")[1]) == 16:
+                        _domain_name = _domain_name.replace("0/16.0.", "")
+                    elif int(line.split("/")[1]) == 8:
+                        _domain_name = _domain_name.replace("0/8.0.0.", "")
                     elif int(line.split("/")[1]) <=24:
                         # TODO: implement creation of multiple zones for every /24 within
-                        pass
+                        print(f"WARN: currently only ipv4 subnets with length >=24 or 16 or 8 are possible to be checked: relavent inetnum {line}")
                 elif line.startswith("nserver"):
                     nserver = line[20:].split(" ")
                     # handle edge case where