From: Bob Halley <halley@dnspython.org>
Date: Fri, 14 Aug 2020 20:29:24 +0000 (-0700)
Subject: leading single colons are just as bad as trailing ones
X-Git-Tag: v2.1.0rc1~74
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=50051f68595b519caefbb5d2143bcc60124e7b2a;p=thirdparty%2Fdnspython.git

leading single colons are just as bad as trailing ones
---

diff --git a/dns/ipv6.py b/dns/ipv6.py
index faadb7c2..f0e522c0 100644
--- a/dns/ipv6.py
+++ b/dns/ipv6.py
@@ -125,6 +125,8 @@ def inet_aton(text, ignore_scope=False):
         raise dns.exception.SyntaxError
     elif text.endswith(b':') and not text.endswith(b'::'):
         raise dns.exception.SyntaxError
+    elif text.startswith(b':') and not text.startswith(b'::'):
+        raise dns.exception.SyntaxError
     elif text == b'::':
         text = b'0::'
     #