Ejemplo n.º 1
0
        /// <summary>
        /// 解析请求的数据
        /// 返回请求数据包
        /// </summary>
        /// <param name="buffer">所有收到的数据</param>
        /// <returns></returns>
        public unsafe static FrameRequest From(ReceiveBuffer buffer)
        {
            if (buffer.Length < 2)
            {
                return(null);
            }

            ByteBits byte0     = buffer[0];
            var      fin       = byte0[0];
            var      frameCode = (FrameCodes)(byte)byte0.Take(4, 4);

            if (fin == false || frameCode == FrameCodes.Continuation)
            {
                return(null);
            }

            var      rsv   = byte0.Take(1, 3);
            ByteBits byte1 = buffer[1];
            var      mask  = byte1[0];

            if (mask == false || Enum.IsDefined(typeof(FrameCodes), frameCode) == false || rsv != 0)
            {
                return(null);
            }

            var contentLength = (int)byte1.Take(1, 7);

            buffer.Position = 2;

            if (contentLength == 127)
            {
                contentLength = (int)buffer.ReadUInt64();
            }
            else if (contentLength == 126)
            {
                contentLength = (int)buffer.ReadUInt16();
            }

            var packetLength = 6 + contentLength;

            if (buffer.Length < packetLength)
            {
                return(null);
            }

            var maskingKey = buffer.ReadArray(4);
            var content    = buffer.ReadArray(contentLength);

            buffer.Clear(packetLength);

            if (contentLength > 0)
            {
                fixed(byte *pcontent = &content[0], pmask = &maskingKey[0])
                {
                    for (var i = 0; i < contentLength; i++)
                    {
                        *(pcontent + i) = (byte)(*(pcontent + i) ^ *(pmask + i % 4));
                    }
                }
            }

            return(new FrameRequest
            {
                Fin = fin,
                Rsv = rsv,
                Mask = mask,
                Frame = frameCode,
                ContentLength = contentLength,
                MaskingKey = maskingKey,
                Content = content
            });
        }
Ejemplo n.º 2
0
        /// <summary>
        /// 解析请求的数据
        /// 返回请求数据包
        /// </summary>
        /// <param name="buffer">所有收到的数据</param>  
        /// <returns></returns>
        public static unsafe FrameRequest From(ReceiveBuffer buffer)
        {
            if (buffer.Length < 2)
            {
                return null;
            }

            ByteBits byte0 = buffer[0];
            var fin = byte0[0];
            var frameCode = (FrameCodes)(byte)byte0.Take(4, 4);

            if (fin == false || frameCode == FrameCodes.Continuation)
            {
                return null;
            }

            var rsv = byte0.Take(1, 3);
            ByteBits byte1 = buffer[1];
            var mask = byte1[0];

            if (mask == false || Enum.IsDefined(typeof(FrameCodes), frameCode) == false || rsv != 0)
            {
                return null;
            }

            var contentLength = (int)byte1.Take(1, 7);
            buffer.Position = 2;

            if (contentLength == 127)
            {
                contentLength = (int)buffer.ReadUInt64();
            }
            else if (contentLength == 126)
            {
                contentLength = (int)buffer.ReadUInt16();
            }

            var packetLength = 6 + contentLength;
            if (buffer.Length < packetLength)
            {
                return null;
            }

            var maskingKey = buffer.ReadArray(4);
            var content = buffer.ReadArray(contentLength);
            buffer.Clear(packetLength);

            if (contentLength > 0)
            {
                fixed (byte* pcontent = &content[0], pmask = &maskingKey[0])
                {
                    for (var i = 0; i < contentLength; i++)
                    {
                        *(pcontent + i) = (byte)(*(pcontent + i) ^ *(pmask + i % 4));
                    }
                }
            }

            return new FrameRequest
            {
                Fin = fin,
                Rsv = rsv,
                Mask = mask,
                Frame = frameCode,
                ContentLength = contentLength,
                MaskingKey = maskingKey,
                Content = content
            };
        }