oexBOOL CDataPacket::VerifyPacket()
{
// Do we already know there is a valid packet?
if ( m_bValidPacket )
return oexTRUE;
oexUINT uAvailable = 0;
do
{
// Attempt to find a packet in the buffer
if ( !FindPacket( &m_ph, &uAvailable ) )
return oexFALSE;
// Verify the length of the packet is available
if ( m_ph.dwLength > uAvailable )
return oexFALSE;
// Enforce maximum packet size
if ( m_ph.dwLength <= GetMaxSize() )
{
oexUCHAR *pBuf = oexNULL;
oexUINT uSize = 0, uView = 0;
// Initialize the check sum
oexGUID csCur, csBuf;
oss::CMd5 md5;
// Calculate the md5 hash
while ( GetReadView( uView++, 0, m_ph.dwLength - sizeof( oexGUID ), &pBuf, &uSize ) )
// Update the md5 hash
md5.Update( pBuf, uSize );
// What is our calculated checksum?
md5.Final( &csCur );
// Read the checksum from the buffer
Peek( &csBuf, sizeof( csBuf ), oexNULL, m_ph.dwLength - sizeof( oexGUID ) );
// Do the checksums match?
if ( guid::CmpGuid( &csCur, &csBuf ) )
{ m_bValidPacket = oexTRUE;
return oexTRUE;
} // end if
} // end if
// Skip over the id
} while ( AdvanceReadPtr( 4 ) );
return oexFALSE;
}
void CServerKillCamForwarder::Update()
{
CTimeValue now=gEnv->pTimer->GetCurrTime();
const float k_timeout=2.0f;
if (!m_forwarding.empty())
{
int maxCycles=m_forwarding.size();
bool bSent=false;
do
{
SForwardingPacket &forward=m_forwarding.front();
CActor::KillCamFPData* packet=FindPacket(forward.iterator, forward.pActor, forward.packetID);
if (packet)
{
ForwardPacket(forward, packet);
bSent=true;
if (forward.m_sent>=forward.m_numPackets)
m_forwarding.pop_front();
}
else
{
if (forward.m_sent!=forward.m_numPackets)
{
CryLog("Underflowed forwarding packetID %d from actor %s after sending %d packets\n", forward.packetID, forward.pActor->GetEntity()->GetName(), forward.m_sent);
if (forward.m_lastPacketTime.GetDifferenceInSeconds(now)>=k_timeout)
{
CryLog("Underflowing packet timed out, did the client disconnect? Giving up :(\n");
}
else
{
// Re-add to the end of the list for trying later (forward packet can arrive before all source packets have arrived)
m_forwarding.push_back(forward);
}
}
m_forwarding.pop_front();
maxCycles--;
}
} while (!bSent && maxCycles>0);
}
}
