仿真平台内核初版 -tlib库 包含<sparc arm riscv powerPC>

lib/Packet.Net/PacketDotNet/Ieee80211/AckFrame.cs

@@ -0,0 +1,116 @@
+/*
+This file is part of PacketDotNet
+
+PacketDotNet is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+PacketDotNet is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with PacketDotNet.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/*
+ * Copyright 2012 Alan Rushforth <alan.rushforth@gmail.com>
+ */
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using PacketDotNet.Utils;
+using System.Net.NetworkInformation;
+
+namespace PacketDotNet
+{
+    namespace Ieee80211
+    {
+        /// <summary>
+        /// Format of an ACK frame
+        /// </summary>
+        public class AckFrame : MacFrame
+        {
+            /// <summary>
+            /// Receiver address
+            /// </summary>
+            public PhysicalAddress ReceiverAddress {get; set;}
+
+            /// <summary>
+            /// Length of the frame
+            /// </summary>
+            override public int FrameSize
+            {
+                get
+                {
+                    return (MacFields.FrameControlLength +
+                        MacFields.DurationIDLength +
+                        MacFields.AddressLength);
+                }
+            }
+
+            /// <summary>
+            /// Constructor
+            /// </summary>
+            /// <param name="bas">
+            /// A <see cref="ByteArraySegment"/>
+            /// </param>
+            public AckFrame (ByteArraySegment bas)
+            {
+                header = new ByteArraySegment (bas);
+
+                FrameControl = new FrameControlField (FrameControlBytes);
+                Duration = new DurationField (DurationBytes);
+                ReceiverAddress = GetAddress(0);
+				
+				header.Length = FrameSize;
+            }
+			
+			/// <summary>
+			/// Initializes a new instance of the <see cref="PacketDotNet.Ieee80211.AckFrame"/> class.
+			/// </summary>
+			/// <param name='ReceiverAddress'>
+			/// Receiver address.
+			/// </param>
+			public AckFrame (PhysicalAddress ReceiverAddress)
+			{
+				this.FrameControl = new FrameControlField ();
+                this.Duration = new DurationField ();
+				this.ReceiverAddress = ReceiverAddress;
+				
+                this.FrameControl.SubType = FrameControlField.FrameSubTypes.ControlACK;
+			}
+			
+			/// <summary>
+            /// Writes the current packet properties to the backing ByteArraySegment.
+            /// </summary>
+            public override void UpdateCalculatedValues ()
+            {
+                if ((header == null) || (header.Length > (header.BytesLength - header.Offset)) || (header.Length < FrameSize))
+                {
+                    header = new ByteArraySegment (new Byte[FrameSize]);
+                }
+                
+                this.FrameControlBytes = this.FrameControl.Field;
+                this.DurationBytes = this.Duration.Field;
+                SetAddress (0, ReceiverAddress);
+            }
+			
+            /// <summary>
+            /// Returns a string with a description of the addresses used in the packet.
+            /// This is used as a compoent of the string returned by ToString().
+            /// </summary>
+            /// <returns>
+            /// The address string.
+            /// </returns>
+            protected override String GetAddressString()
+            {
+                return String.Format("RA {0}", ReceiverAddress);
+            }
+        } 
+    }
+
+}