From f0640ada291df82394f02eb544d51c9320d111f6 Mon Sep 17 00:00:00 2001
From: Masato Ikeda <masato.ikeda@gmail.com>
Date: Fri, 27 Apr 2018 18:26:08 +0900
Subject: [PATCH] Improve regex

Match eather `-` or `.` but not both at the same time.
---
 src/nip.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/nip.py b/src/nip.py
index 7639adc..e096b30 100755
--- a/src/nip.py
+++ b/src/nip.py
@@ -131,7 +131,7 @@ class DynamicBackend:
 
     def handle_subdomains(self, qname):
         subdomain = qname[0:qname.find(self.domain) - 1]
-        match = re.findall('^(?:.+\.)?(\d{1,3}[-.]\d{1,3}[-.]\d{1,3}[-.]\d{1,3})$', subdomain)
+        match = re.findall('^(?:.+\.)?(\d{1,3}([-.])\d{1,3}\2\d{1,3}\2\d{1,3})$', subdomain)
 
         if not match:
             if DEBUG: