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strict check of bounds

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This commit is contained in:
Jeff Becker 2020-03-31 09:26:39 -04:00 committed by Jason Rhinelander
parent dd9c8c91a3
commit 8c84eac718
1 changed files with 5 additions and 3 deletions
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8
llarp/iwp/session.cpp
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@ -716,8 +716,10 @@ namespace llarp
void
Session::HandleXMIT(Packet_t data)
{
if(data.size() < (CommandOverhead + PacketOverhead + sizeof(uint16_t)
+ sizeof(uint64_t) + ShortHash::SIZE))
static constexpr size_t XMITOverhead =
(CommandOverhead + PacketOverhead + sizeof(uint16_t)
+ sizeof(uint64_t) + ShortHash::SIZE);
if(data.size() < XMITOverhead)
{
LogError("short XMIT from ", m_RemoteAddr);
return;
@ -750,7 +752,7 @@ namespace llarp
InboundMessage{rxid, sz, std::move(h), m_Parent->Now()})
.first;
sz = std::min(sz, uint16_t{FragmentSize});
if(data.size() > sz)
if((data.size() - XMITOverhead) == sz)
{
{
const llarp_buffer_t buf(data.data() + (data.size() - sz), sz);