if(Flags&NET_CHUNKFLAG_VITAL && !(Flags&NET_CHUNKFLAG_RESEND))
    {
        // save packet if we need to resend
        CNetChunkResend *pResend = m_Buffer.Allocate(sizeof(CNetChunkResend)+DataSize);
        if(pResend)
        {
            pResend->m_Sequence = Sequence;
            pResend->m_Flags = Flags;
            pResend->m_DataSize = DataSize;
            pResend->m_pData = (unsigned char *)(pResend+1);
            pResend->m_FirstSendTime = time_get();
            pResend->m_LastSendTime = pResend->m_FirstSendTime;
            mem_copy(pResend->m_pData, pData, DataSize);
        }
        else
        {
            // out of buffer
            Disconnect("too weak connection (out of buffer)");
            return -1;
        }

        m_Buffer.PopFirst();
    }