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Check expected size properly on DNS::extract_metadata

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Thanks @shshzi for finding this one
This commit is contained in:
Matias Fontanini
2017-01-15 09:04:19 -08:00
parent 84cb686928
commit 94e5ac2109
1 changed files with 1 additions and 1 deletions
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2
src/dns.cpp
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@@ -52,7 +52,7 @@ using Tins::Memory::OutputMemoryStream;
namespace Tins {
PDU::metadata DNS::extract_metadata(const uint8_t *buffer, uint32_t total_sz) {
if (TINS_UNLIKELY(sizeof(dns_header))) {
if (TINS_UNLIKELY(total_sz < sizeof(dns_header))) {
throw malformed_packet();
}
return metadata(total_sz, pdu_flag, PDU::UNKNOWN);