From: Peter van Dijk <peter.van.dijk@netherlabs.nl>
Date: Tue, 21 Apr 2015 09:58:27 +0000 (+0200)
Subject: allow referencing of compressed label directly before another compressed label, thank... 
X-Git-Tag: dnsdist-1.0.0-alpha1~248^2~98^2~9
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f72d855550e629d7477e12c7d04a1f99d53683c6;p=thirdparty%2Fpdns.git

allow referencing of compressed label directly before another compressed label, thanks @giganteous
---

diff --git a/pdns/dnsparser.cc b/pdns/dnsparser.cc
index 880d37f0a1..b335ae763f 100644
--- a/pdns/dnsparser.cc
+++ b/pdns/dnsparser.cc
@@ -475,7 +475,7 @@ void PacketReader::getLabelFromContent(const vector<uint8_t>& content, uint16_t&
       uint16_t offset=256*(labellen & ~0xc0) + (unsigned int)content.at(frompos++) - sizeof(dnsheader);
       //        cout<<"This is an offset, need to go to: "<<offset<<endl;
 
-      if(offset >= pos-2)
+      if(offset >= pos)
         throw MOADNSException("forward reference during label decompression");
       return getLabelFromContent(content, offset, ret, ++recurs);
     }