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Fix a bug in rdlen update while decompressing a name

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This commit is contained in:
Giovanni Bajo
2012-05-02 00:16:08 +02:00
committed by Simon Kelley
parent ec2962eacb
commit 0db0e0c216
1 changed files with 3 additions and 1 deletions
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4
src/dnssec.c
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@@ -141,8 +141,10 @@ static int process_domain_name(struct dns_header *header, size_t pktlen,
label_type = count & 0xC0; label_type = count & 0xC0;
if (label_type == 0xC0) if (label_type == 0xC0)
{ {
int l2;
if (p >= end) if (p >= end)
return 0; return 0;
l2 = *p++;
if (hops == 0) if (hops == 0)
{ {
if (p - *rdata > *rdlen) if (p - *rdata > *rdlen)
@@ -152,7 +154,7 @@ static int process_domain_name(struct dns_header *header, size_t pktlen,
} }
if (++hops == 256) if (++hops == 256)
return 0; return 0;
p = (unsigned char*)header + (count & 0x3F) * 256 + *p; p = (unsigned char*)header + (count & 0x3F) * 256 + l2;
} }
else if (label_type == 0x00) else if (label_type == 0x00)
{ {