示例#1
0
        /// <summary>
        /// See if the received packet can be processed and split it up into different ones.
        /// </summary>

        bool ProcessBuffer(int bytes)
        {
            if (mReceiveBuffer == null)
            {
                // Create a new packet buffer
                mReceiveBuffer = Buffer.Create();
                mReceiveBuffer.BeginWriting(false).Write(mTemp, 0, bytes);
                mExpected = 0;
                mOffset   = 0;
            }
            else
            {
                // Append this data to the end of the last used buffer
                mReceiveBuffer.BeginWriting(true).Write(mTemp, 0, bytes);
            }

            for (int available = mReceiveBuffer.size - mOffset; available >= 4;)
            {
                // Figure out the expected size of the packet
                if (mExpected == 0)
                {
                    mExpected = mReceiveBuffer.PeekInt(mOffset);

                    // "GET " -- HTTP GET request sent by a web browser
                    if (mExpected == 542393671)
                    {
                        if (httpGetSupport)
                        {
                            if (stage == Stage.Verifying || stage == Stage.WebBrowser)
                            {
                                stage = Stage.WebBrowser;
                                string request = Encoding.ASCII.GetString(mReceiveBuffer.buffer, mOffset, available);
                                mReceiveBuffer.BeginPacket(Packet.RequestHTTPGet).Write(request);
                                mReceiveBuffer.EndPacket();
                                mReceiveBuffer.BeginReading(4);
                                lock (mIn) mIn.Enqueue(mReceiveBuffer);
                                mReceiveBuffer = null;
                                mExpected      = 0;
                                mOffset        = 0;
                            }
                            return(true);
                        }

                        mReceiveBuffer.Recycle();
                        mReceiveBuffer = null;
                        mExpected      = 0;
                        mOffset        = 0;
                        Disconnect();
                        return(false);
                    }
                    else if (mExpected < 0 || mExpected > 16777216)
                    {
#if UNITY_EDITOR
                        UnityEngine.Debug.LogError("Malformed data packet: " + mOffset + ", " + available + " / " + mExpected);
#else
                        Tools.LogError("Malformed data packet: " + mOffset + ", " + available + " / " + mExpected);
#endif
                        mReceiveBuffer.Recycle();
                        mReceiveBuffer = null;
                        mExpected      = 0;
                        mOffset        = 0;
                        Disconnect();
                        return(false);
                    }
                }

                // The first 4 bytes of any packet always contain the number of bytes in that packet
                available -= 4;

                // If the entire packet is present
                if (available == mExpected)
                {
                    // Reset the position to the beginning of the packet
                    mReceiveBuffer.BeginReading(mOffset + 4);

                    // This packet is now ready to be processed
                    lock (mIn) mIn.Enqueue(mReceiveBuffer);

                    mReceiveBuffer = null;
                    mExpected      = 0;
                    mOffset        = 0;
                    break;
                }
                else if (available > mExpected)
                {
                    // There is more than one packet. Extract this packet fully.
                    int    realSize = mExpected + 4;
                    Buffer temp     = Buffer.Create();

                    // Extract the packet and move past its size component
                    BinaryWriter bw = temp.BeginWriting(false);
                    bw.Write(mReceiveBuffer.buffer, mOffset, realSize);
                    temp.BeginReading(4);

                    // This packet is now ready to be processed
                    lock (mIn) mIn.Enqueue(temp);

                    // Skip this packet
                    available -= mExpected;
                    mOffset   += realSize;
                    mExpected  = 0;
                }
                else
                {
                    break;
                }
            }
            return(true);
        }
示例#2
0
        /// <summary>
        /// See if the received packet can be processed and split it up into different ones.
        /// </summary>

        bool ProcessBuffer(int bytes)
        {
            if (mReceiveBuffer == null)
            {
                // Create a new packet buffer
                mReceiveBuffer = Buffer.Create();
                mReceiveBuffer.BeginWriting(false).Write(mTemp, 0, bytes);
            }
            else
            {
                // Append this data to the end of the last used buffer
                mReceiveBuffer.BeginWriting(true).Write(mTemp, 0, bytes);
            }

            for (int available = mReceiveBuffer.size - mOffset; available >= 4;)
            {
                // Figure out the expected size of the packet
                if (mExpected == 0)
                {
                    mExpected = mReceiveBuffer.PeekInt(mOffset);

                    if (mExpected < 0 || mExpected > 16777216)
                    {
                        Close(true);
                        return(false);
                    }
                }

                // The first 4 bytes of any packet always contain the number of bytes in that packet
                available -= 4;

                // If the entire packet is present
                if (available == mExpected)
                {
                    // Reset the position to the beginning of the packet
                    mReceiveBuffer.BeginReading(mOffset + 4);

                    // This packet is now ready to be processed
                    lock (mIn) mIn.Enqueue(mReceiveBuffer);

                    mReceiveBuffer = null;
                    mExpected      = 0;
                    mOffset        = 0;
                    break;
                }
                else if (available > mExpected)
                {
                    // There is more than one packet. Extract this packet fully.
                    int    realSize = mExpected + 4;
                    Buffer temp     = Buffer.Create();

                    // Extract the packet and move past its size component
                    temp.BeginWriting(false).Write(mReceiveBuffer.buffer, mOffset, realSize);
                    temp.BeginReading(4);

                    // This packet is now ready to be processed
                    lock (mIn) mIn.Enqueue(temp);

                    // Skip this packet
                    available -= mExpected;
                    mOffset   += realSize;
                    mExpected  = 0;
                }
                else
                {
                    break;
                }
            }
            return(true);
        }
示例#3
0
        /// <summary>
        /// See if the received packet can be processed and split it up into different ones.
        /// </summary>

        bool ProcessBuffer(byte[] bytes, int offset, int byteCount)
        {
            if (offset + byteCount > bytes.Length)
            {
                LogError("ProcessBuffer(" + bytes.Length + " bytes, offset " + offset + ", count " + byteCount);
                return(false);
            }

            if (mReceiveBuffer == null)
            {
                // Create a new packet buffer
                mReceiveBuffer = Buffer.Create();
                mReceiveBuffer.BeginWriting(false).Write(bytes, offset, byteCount);
                mExpected = 0;
                mOffset   = 0;
            }
            else
            {
                // Append this data to the end of the last used buffer
                mReceiveBuffer.BeginWriting(true).Write(bytes, offset, byteCount);
            }

            for (mAvailable = mReceiveBuffer.size - mOffset; mAvailable > 4;)
            {
                // Figure out the expected size of the packet
                if (mExpected == 0)
                {
                    mExpected = mReceiveBuffer.PeekInt(mOffset);

                    // "GET " -- HTTP GET request sent by a web browser
                    if (mExpected == 542393671)
                    {
                        if (httpGetSupport)
                        {
                            if (stage == Stage.Verifying || stage == Stage.WebBrowser)
                            {
                                stage = Stage.WebBrowser;
                                string request = Encoding.ASCII.GetString(mReceiveBuffer.buffer, mOffset, mAvailable);
                                mReceiveBuffer.BeginPacket(Packet.RequestHTTPGet).Write(request);
                                mReceiveBuffer.EndPacket();
                                mReceiveBuffer.BeginReading(4);

                                lock (mIn)
                                {
                                    mIn.Enqueue(mReceiveBuffer);
                                    mReceiveBuffer = null;
                                    mExpected      = 0;
                                    mOffset        = 0;
                                }
                            }
                            return(true);
                        }

                        mReceiveBuffer.Recycle();
                        mReceiveBuffer = null;
                        mExpected      = 0;
                        mOffset        = 0;
                        Disconnect();
                        return(false);
                    }
                    else if (mExpected < 0 || mExpected > 16777216)
                    {
#if UNITY_EDITOR
                        LogError("Malformed data packet: " + mOffset + ", " + mAvailable + " / " + mExpected);

                        var temp = new byte[mReceiveBuffer.size];
                        for (int i = 0; i < byteCount; ++i)
                        {
                            temp[i] = mReceiveBuffer.buffer[i];
                        }

                        var fn = "error_" + lastReceivedTime + ".full";
                        Tools.WriteFile(fn, temp);
                        Debug.Log("Packet saved as " + fn);
#else
                        LogError("Malformed data packet: " + mOffset + ", " + mAvailable + " / " + mExpected);
#endif
                        mReceiveBuffer.Recycle();
                        mReceiveBuffer = null;
                        mExpected      = 0;
                        mOffset        = 0;
                        Disconnect();
                        return(false);
                    }
                }

                // The first 4 bytes of any packet always contain the number of bytes in that packet
                mAvailable -= 4;

                // If the entire packet is present
                if (mAvailable == mExpected)
                {
                    // Reset the position to the beginning of the packet
                    mReceiveBuffer.BeginReading(mOffset + 4);

                    // This packet is now ready to be processed
                    lock (mIn)
                    {
                        mIn.Enqueue(mReceiveBuffer);
                        mReceiveBuffer = null;
                        mExpected      = 0;
                        mOffset        = 0;
                    }
                    break;
                }
                else if (mAvailable > mExpected)
                {
                    // There is more than one packet. Extract this packet fully.
                    int realSize = mExpected + 4;
                    var temp     = Buffer.Create();

                    // Extract the packet and move past its size component
                    var bw = temp.BeginWriting();
                    bw.Write(mReceiveBuffer.buffer, mOffset, realSize);
                    temp.BeginReading(4);

                    // This packet is now ready to be processed
                    lock (mIn)
                    {
                        mIn.Enqueue(temp);

                        // Skip this packet
                        mAvailable -= mExpected;
                        mOffset    += realSize;
                        mExpected   = 0;
                    }
                }
                else
                {
                    break;
                }
            }
            return(true);
        }