Fix a bug in rdlen update while decompressing a name

0db0e0c2 · Giovanni Bajo · Simon Kelley · ec2962ea · 0db0e0c2
Commit 0db0e0c2 authored May 02, 2012 by Giovanni Bajo Committed by Simon Kelley Aug 20, 2013
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src/dnssec.c src/dnssec.c +3 -1

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--- a/src/dnssec.c
+++ b/src/dnssec.c
@@ -141,8 +141,10 @@ static int process_domain_name(struct dns_header *header, size_t pktlen,
      label_type = count & 0xC0;
      if (label_type == 0xC0)
        {
+          int l2;
          if (p >= end)
            return 0;
+          l2 = *p++;
          if (hops == 0)
            {
              if (p - *rdata > *rdlen)
@@ -152,7 +154,7 @@ static int process_domain_name(struct dns_header *header, size_t pktlen,
            }
          if (++hops == 256)
            return 0;
-          p = (unsigned char*)header + (count & 0x3F) * 256 + *p;
+          p = (unsigned char*)header + (count & 0x3F) * 256 + l2;
        }
      else if (label_type == 0x00)
        {