580 lines
17 KiB
C#
580 lines
17 KiB
C#
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/*
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This file is part of PacketDotNet
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PacketDotNet is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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PacketDotNet is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PacketDotNet. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Copyright 2010 Chris Morgan <chmorgan@gmail.com>
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*/
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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namespace PacketDotNet
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{
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namespace Ieee80211
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{
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/// <summary>
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/// Every 802.11 frame has a control field that contains information about the frame including
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/// the 802.11 protocol version, frame type, and various indicators, such as whether WEP is on,
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/// power management is active.
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/// </summary>
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public class FrameControlField
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{
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/// <summary>
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/// Protocol version
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/// </summary>
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public byte ProtocolVersion
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{
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get
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{
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return (byte)((Field >> 0x8) & 0x3);
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}
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set
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{
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if ((value < 0) || (value > 3))
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{
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throw new ArgumentException("Invalid protocol version value. Value must be in the range 0-3.");
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}
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//unset the two bits before setting them to the value
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Field &= unchecked((UInt16)~(0x0300));
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Field |= (UInt16)(value << 0x8);
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}
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}
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/// <summary>
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/// Specifies the main frame type: Control, Management or Data.
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/// </summary>
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public enum FrameTypes
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{
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/// <summary>
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/// Management frame.
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/// </summary>
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Management = 0,
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/// <summary>
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/// Control frame.
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/// </summary>
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Control = 1,
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/// <summary>
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/// Data frame.
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/// </summary>
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Data = 2
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}
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/// <summary>
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/// Sepcifies the frame types down to the sub type level.
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/// </summary>
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public enum FrameSubTypes
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{
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/// <summary>
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/// Association request
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/// </summary>
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ManagementAssociationRequest = 0x00,
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/// <summary>
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/// Association response
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/// </summary>
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ManagementAssociationResponse = 0x01,
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/// <summary>
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/// Reassociation request
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/// </summary>
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ManagementReassociationRequest = 0x02,
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/// <summary>
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/// Reassociation response
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/// </summary>
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ManagementReassociationResponse = 0x03,
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/// <summary>
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/// Probe request
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/// </summary>
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ManagementProbeRequest = 0x04,
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/// <summary>
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/// Probe response
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/// </summary>
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ManagementProbeResponse = 0x5,
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/// <summary>
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/// Reserved 0
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/// </summary>
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ManagementReserved0 = 0x6,
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/// <summary>
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/// Reserved 1
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/// </summary>
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ManagementReserved1 = 0x7,
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/// <summary>
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/// Beacon
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/// </summary>
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ManagementBeacon = 0x8,
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/// <summary>
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/// ATIM
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/// </summary>
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ManagementATIM = 0x9,
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/// <summary>
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/// Disassociation
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/// </summary>
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ManagementDisassociation = 0xA,
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/// <summary>
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/// Authentication
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/// </summary>
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ManagementAuthentication = 0xB,
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/// <summary>
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/// Deauthentication
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/// </summary>
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ManagementDeauthentication = 0xC,
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/// <summary>
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/// Reserved 2
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/// </summary>
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ManagementAction = 0xD,
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/// <summary>
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/// Reserved 3
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/// </summary>
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ManagementReserved3 = 0xE,
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/// <summary>
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/// Blck Acknowledgment Request (QOS)
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/// </summary>
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ControlBlockAcknowledgmentRequest = 0x18,
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/// <summary>
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/// Blck Acknowledgment (QOS)
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/// </summary>
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ControlBlockAcknowledgment = 0x19,
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/// <summary>
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/// PS poll
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/// </summary>
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ControlPSPoll = 0x1A,
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/// <summary>
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/// RTS
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/// </summary>
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ControlRTS = 0x1B,
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/// <summary>
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/// CTS
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/// </summary>
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ControlCTS = 0x1C,
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/// <summary>
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/// ACK
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/// </summary>
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ControlACK = 0x1D,
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/// <summary>
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/// CF-End
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/// </summary>
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ControlCFEnd = 0x1E,
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/// <summary>
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/// CF-End CF-Ack
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/// </summary>
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ControlCFEndCFACK = 0x1F,
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/// <summary>
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/// Data
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/// </summary>
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Data = 0x20,
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/// <summary>
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/// CF-ACK
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/// </summary>
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DataCFACK = 0x21,
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/// <summary>
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/// CF-Poll
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/// </summary>
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DataCFPoll = 0x22,
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/// <summary>
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/// CF-Ack CF-Poll
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/// </summary>
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DataCFAckCFPoll = 0x23,
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/// <summary>
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/// Null function no data
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/// </summary>
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DataNullFunctionNoData = 0x24,
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/// <summary>
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/// CF-Ack No data
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/// </summary>
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DataCFAckNoData = 0x25,
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/// <summary>
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/// CF-Poll no data
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/// </summary>
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DataCFPollNoData = 0x26,
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/// <summary>
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/// CF-Ack CF-Poll no data
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/// </summary>
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DataCFAckCFPollNoData = 0x27,
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/// <summary>
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/// Constant qos data.
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/// </summary>
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QosData = 0x28,
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/// <summary>
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/// Constant qos data and CF ack.
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/// </summary>
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QosDataAndCFAck = 0x29,
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/// <summary>
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/// Constant qos data and CF poll.
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/// </summary>
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QosDataAndCFPoll = 0x2A,
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/// <summary>
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/// Constant qos data and CF ack and CF poll.
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/// </summary>
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QosDataAndCFAckAndCFPoll = 0x2B,
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/// <summary>
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/// Constant qos null data.
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/// </summary>
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QosNullData = 0x2C,
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/// <summary>
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/// Constant qos CF ack.
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/// </summary>
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QosCFAck = 0x2D,
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/// <summary>
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/// Constant qos CF poll.
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/// </summary>
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QosCFPoll = 0x2E,
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/// <summary>
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/// Constant qos CF ack and CF poll.
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/// </summary>
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QosCFAckAndCFPoll = 0x2F
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};
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/// <summary>
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/// Gets the type of the frame.
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/// </summary>
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/// <value>
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/// The type.
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/// </value>
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public FrameTypes Type
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{
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get
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{
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int typeAndSubtype = (Field >> 8); //get rid of the flags
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int type = ((typeAndSubtype & 0xC) >> 2);
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return (FrameTypes)type;
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}
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}
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/// <summary>
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/// Helps to identify the type of WLAN frame, control data and management are
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/// the various frame types defined in IEEE 802.11
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/// </summary>
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public FrameSubTypes SubType
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{
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get
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{
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int typeAndSubtype = (Field >> 8); //get rid of the flags
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int type = (((typeAndSubtype & 0x0C) << 2) | (typeAndSubtype >> 4));
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return (FrameSubTypes)type;
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}
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set
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{
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uint val = (uint)value;
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uint typeAndSubtype = ((val & 0x0F) << 4) | ((val >> 4) << 2);
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//shift it into the right position in the field
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typeAndSubtype = typeAndSubtype << 0x8;
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//Unset all the bits related to the type and subtype
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Field &= 0x03FF;
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//Set the type bits
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Field |= (UInt16)typeAndSubtype;
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}
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}
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/// <summary>
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/// Is set to 1 when the frame is sent to Distribution System (DS)
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/// </summary>
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public bool ToDS
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{
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get
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{
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return ((Field & 0x1) == 1) ? true : false;
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}
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set
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{
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if (value)
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{
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Field |= 0x1;
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}
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else
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{
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Field &= unchecked((UInt16)~(0x1));
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}
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}
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}
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/// <summary>
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/// Is set to 1 when the frame is received from the Distribution System (DS)
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/// </summary>
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public bool FromDS
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{
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get
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{
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return (((Field >> 1) & 0x1) == 1) ? true : false;
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}
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set
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{
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if (value)
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{
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Field |= (1 << 0x1);
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}
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else
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{
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Field &= unchecked((UInt16)~(1 << 0x1));
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}
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}
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}
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/// <summary>
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/// More Fragment is set to 1 when there are more fragments belonging to the same
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/// frame following the current fragment
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/// </summary>
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public bool MoreFragments
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{
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get
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{
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return (((Field >> 2) & 0x1) == 1) ? true : false;
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}
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set
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{
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if (value)
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{
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Field |= (1 << 0x2);
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}
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else
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{
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Field &= unchecked((UInt16)~(1 << 0x2));
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}
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}
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}
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/// <summary>
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/// Indicates that this fragment is a retransmission of a previously transmitted fragment.
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/// (For receiver to recognize duplicate transmissions of frames)
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/// </summary>
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public bool Retry
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{
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get
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{
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return (((Field >> 3) & 0x1) == 1) ? true : false;
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|||
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}
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|||
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|||
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set
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|||
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{
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|||
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if (value)
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|||
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{
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Field |= (1 << 0x3);
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}
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else
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{
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Field &= unchecked((UInt16)~(1 << 0x3));
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|||
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}
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|||
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}
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}
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/// <summary>
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|||
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/// Indicates the power management mode that the station will be in after the transmission of the frame
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|||
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/// </summary>
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|||
|
|
public bool PowerManagement
|
|||
|
|
{
|
|||
|
|
get
|
|||
|
|
{
|
|||
|
|
return (((Field >> 4) & 0x1) == 1) ? true : false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
set
|
|||
|
|
{
|
|||
|
|
if (value)
|
|||
|
|
{
|
|||
|
|
Field |= (1 << 0x4);
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
Field &= unchecked((UInt16)~(1 << 0x4));
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Indicates that there are more frames buffered for this station
|
|||
|
|
/// </summary>
|
|||
|
|
public bool MoreData
|
|||
|
|
{
|
|||
|
|
get
|
|||
|
|
{
|
|||
|
|
return (((Field >> 5) & 0x1) == 1) ? true : false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
set
|
|||
|
|
{
|
|||
|
|
if (value)
|
|||
|
|
{
|
|||
|
|
Field |= (1 << 0x5);
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
Field &= unchecked((UInt16)~(1 << 0x5));
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Indicates that the frame body is encrypted according to the WEP (wired equivalent privacy) algorithm
|
|||
|
|
/// </summary>
|
|||
|
|
public bool Wep
|
|||
|
|
{
|
|||
|
|
get
|
|||
|
|
{
|
|||
|
|
return (((Field >> 6) & 0x1) == 1) ? true : false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
set
|
|||
|
|
{
|
|||
|
|
if (value)
|
|||
|
|
{
|
|||
|
|
Field |= (1 << 0x6);
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
Field &= unchecked((UInt16)~(1 << 0x6));
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Bit is set when the "strict ordering" delivery method is employed. Frames and
|
|||
|
|
/// fragments are not always sent in order as it causes a transmission performance penalty.
|
|||
|
|
/// </summary>
|
|||
|
|
public bool Order
|
|||
|
|
{
|
|||
|
|
get
|
|||
|
|
{
|
|||
|
|
return (((Field >> 0x7) & 0x1) == 1) ? true : false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
set
|
|||
|
|
{
|
|||
|
|
if (value)
|
|||
|
|
{
|
|||
|
|
Field |= (1 << 0x7);
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
Field &= unchecked((UInt16)~(1 << 0x7));
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Gets or sets the field.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <value>
|
|||
|
|
/// The field.
|
|||
|
|
/// </value>
|
|||
|
|
public UInt16 Field { get; set; }
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Initializes a new instance of the <see cref="PacketDotNet.Ieee80211.FrameControlField"/> class.
|
|||
|
|
/// </summary>
|
|||
|
|
public FrameControlField()
|
|||
|
|
{
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Constructor
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="field">
|
|||
|
|
/// A <see cref="UInt16"/>
|
|||
|
|
/// </param>
|
|||
|
|
public FrameControlField(UInt16 field)
|
|||
|
|
{
|
|||
|
|
this.Field = field;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Returns a <see cref="System.String"/> that represents the current <see cref="PacketDotNet.Ieee80211.FrameControlField"/>.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <returns>
|
|||
|
|
/// A <see cref="System.String"/> that represents the current <see cref="PacketDotNet.Ieee80211.FrameControlField"/>.
|
|||
|
|
/// </returns>
|
|||
|
|
public override string ToString ()
|
|||
|
|
{
|
|||
|
|
var flags = new List<String>();
|
|||
|
|
|
|||
|
|
flags.Add(SubType.ToString());
|
|||
|
|
|
|||
|
|
if (ToDS)
|
|||
|
|
{
|
|||
|
|
flags.Add("ToDS");
|
|||
|
|
}
|
|||
|
|
if (FromDS)
|
|||
|
|
{
|
|||
|
|
flags.Add("FromDS");
|
|||
|
|
}
|
|||
|
|
if (Retry)
|
|||
|
|
{
|
|||
|
|
flags.Add("Retry");
|
|||
|
|
}
|
|||
|
|
if (PowerManagement)
|
|||
|
|
{
|
|||
|
|
flags.Add("PowerManagement");
|
|||
|
|
}
|
|||
|
|
if (MoreData)
|
|||
|
|
{
|
|||
|
|
flags.Add("MoreData");
|
|||
|
|
}
|
|||
|
|
if (Wep)
|
|||
|
|
{
|
|||
|
|
flags.Add("Wep");
|
|||
|
|
}
|
|||
|
|
if (Order)
|
|||
|
|
{
|
|||
|
|
flags.Add("Order");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return String.Join(" ", flags.ToArray());
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|