From b98f7715193be85454cbfe4eed7a3282788cef6e Mon Sep 17 00:00:00 2001
From: Giovanni Bajo <rasky@develer.com>
Date: Sun, 22 Apr 2012 15:59:27 +0200
Subject: [PATCH] Filter out invalid characters in domain names.

---
 src/dnssec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/dnssec.c b/src/dnssec.c
index 4cf9503..c5ba5f4 100644
--- a/src/dnssec.c
+++ b/src/dnssec.c
@@ -93,6 +93,8 @@ static int extract_name_no_compression(unsigned char *rr, int maxlen, char *buf)
       while (count-- >= 0 && rr < end)
         {
           *buf = *rr++;
+          if (!isascii(*buf) || iscntrl(*buf) || *buf == '.')
+            return 0;
           if (*buf >= 'A' && *buf <= 'Z')
             *buf += 'a' - 'A';
           buf++;