//Create a base packet to use as parent for the other classes
public virtual void GetBase(string MACsrc, string MACdst, string IPsrc, string IPdst,
string IpId, string TTL)
{
// Ethernet Layer
ethernetLayer = new EthernetLayer
{
Source = new MacAddress(MACsrc),
Destination = new MacAddress(MACdst),
// Set ethernet type
EtherType = EthernetType.None
};
// IpV4 Layer
ipV4Layer = new IpV4Layer
{
Source = new IpV4Address(IPsrc),
CurrentDestination = new IpV4Address(IPdst),
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null, // Will be filled automatically.
Identification = StringToUShort(IpId),
Options = IpV4Options.None,
Protocol = null, // Will be filled automatically.
Ttl = StringToByte(TTL),
TypeOfService = 0,
};
}
/// <summary>
/// True iff the two IPv4 layers have the same TypeOfService, Identification, Fragmentation, Ttl, Protocol, HeaderChecksum, Source, Destination and Options.
/// </summary>
public bool Equals(IpV4Layer other)
{
return(other != null &&
TypeOfService == other.TypeOfService && Identification == other.Identification &&
Fragmentation == other.Fragmentation && Ttl == other.Ttl &&
Protocol == other.Protocol &&
HeaderChecksum == other.HeaderChecksum &&
Source == other.Source && CurrentDestination == other.CurrentDestination &&
Options.Equals(other.Options));
}
public bool Equals(IpV4Layer other)
{
if (other != null && (int)this.TypeOfService == (int)other.TypeOfService && ((int)this.Identification == (int)other.Identification && this.Fragmentation == other.Fragmentation) && (int)this.Ttl == (int)other.Ttl)
{
IpV4Protocol?protocol1 = this.Protocol;
IpV4Protocol?protocol2 = other.Protocol;
if ((protocol1.GetValueOrDefault() != protocol2.GetValueOrDefault() ? 0 : (protocol1.HasValue == protocol2.HasValue ? 1 : 0)) != 0)
{
ushort?headerChecksum1 = this.HeaderChecksum;
ushort?headerChecksum2 = other.HeaderChecksum;
if (((int)headerChecksum1.GetValueOrDefault() != (int)headerChecksum2.GetValueOrDefault() ? 0 : (headerChecksum1.HasValue == headerChecksum2.HasValue ? 1 : 0)) != 0 && this.Source == other.Source && this.CurrentDestination == other.CurrentDestination)
{
return(this.Options.Equals((PcapDotNet.Packets.Options <IpV4Option>)other.Options));
}
}
}
return(false);
}
public OwnPacketBuilder(PacketType packetType)
{
GetLocalInformation.LocalMacAndIPAddress( out _ownIpAddress, out _ownMacAddress );
ethernetLayer = null;
ipV4Layer = null;
tcpLayer = null;
arpLayer = null;
switch(packetType)
{
case PacketType.ARP :
BuildingArpPacket();
break;
case PacketType.TCP :
BuildingTcpPacket();
break;
case PacketType.Unknown :
break;
default :
break;
}
}
public void SendSynAck(Guid guid)
{
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = ownHardwareAddress,
Destination = ifHardwareAddress,
EtherType = EthernetType.None,
};
IpV4Layer ipV4Layer = new IpV4Layer
{
Source = RoutingTable.connParams[guid].remoteIp,
CurrentDestination = ifProtocolAddress,
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null, // Will be filled automatically.
Identification = ipID,
Options = IpV4Options.None,
Protocol = IpV4Protocol.Tcp,
Ttl = 128,
TypeOfService = 0,
};
TcpLayer tcpLayer = new TcpLayer
{
SourcePort = RoutingTable.connParams[guid].remotePort,
DestinationPort = RoutingTable.connParams[guid].localPort,
Checksum = null, // Will be filled automatically.
SequenceNumber = RoutingTable.connParams[guid].seq,
AcknowledgmentNumber = RoutingTable.connParams[guid].ack,
ControlBits = TcpControlBits.Synchronize | TcpControlBits.Acknowledgment,
Window = RoutingTable.connParams[guid].GetWindow(),
UrgentPointer = 0,
Options = new TcpOptions(new TcpOptionMaximumSegmentSize((ushort)MSS), new TcpOptionWindowScale(RoutingTable.connParams[guid].windowScale)),
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, tcpLayer);
SendPacket(builder.Build(DateTime.Now));
}
public void IpV4Handler(Packet packet, IList<Packet> packetList = null)
{
if (packet.Ethernet.IpV4.Length > MTU)
{
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = ownHardwareAddress,
Destination = packet.Ethernet.Source,
EtherType = EthernetType.None,
};
IpV4Layer ipV4Layer = new IpV4Layer
{
Source = packet.Ethernet.IpV4.Destination,
CurrentDestination = packet.Ethernet.IpV4.Source,
Fragmentation = packet.Ethernet.IpV4.Fragmentation,
HeaderChecksum = null, // Will be filled automatically.
Identification = 123,
Options = packet.Ethernet.IpV4.Options,
Protocol = packet.Ethernet.IpV4.Protocol,
Ttl = packet.Ethernet.IpV4.Ttl,
TypeOfService = packet.Ethernet.IpV4.TypeOfService,
};
IcmpDestinationUnreachableLayer icmpLayer = new IcmpDestinationUnreachableLayer
{
Code = IcmpCodeDestinationUnreachable.FragmentationNeededAndDoNotFragmentSet,
NextHopMaximumTransmissionUnit = (ushort)MTU,
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, icmpLayer);
SendPacket(builder.Build(DateTime.Now));
// TODO: fix warning spam
if (Global.Config.LoadBalancer.ShowTrayTipsWarnings)
Global.ShowTrayTip("Load Balancer", "IP packet larger than the MTU detected on " + Name + ".\n\nIP fragmentation is not supported.", ToolTipIcon.Warning);
Global.WriteLog("Load Balancer: IP packet larger than the MTU detected on " + Name);
return;
}
if (packet.Ethernet.IpV4.Ttl < 2)
{
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = ownHardwareAddress,
Destination = packet.Ethernet.Source,
EtherType = EthernetType.None,
};
IpV4Layer ipV4Layer = new IpV4Layer
{
Source = ownProtocolAddress,
CurrentDestination = packet.Ethernet.IpV4.Source,
Fragmentation = packet.Ethernet.IpV4.Fragmentation,
HeaderChecksum = null, // Will be filled automatically.
Identification = 123,
Options = packet.Ethernet.IpV4.Options,
Protocol = packet.Ethernet.IpV4.Protocol,
Ttl = packet.Ethernet.IpV4.Ttl,
TypeOfService = packet.Ethernet.IpV4.TypeOfService,
};
IcmpTimeExceededLayer icmpLayer = new IcmpTimeExceededLayer
{
Code = 0,
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, icmpLayer, packet.Ethernet.IpV4.ExtractLayer(), packet.Ethernet.IpV4.Payload.ExtractLayer());
SendPacket(builder.Build(DateTime.Now));
return;
}
if (packet.Ethernet.IpV4.Protocol == IpV4Protocol.InternetControlMessageProtocol)
{
if (packet.Ethernet.IpV4.Destination == ownProtocolAddress)
{
if ((packet.Ethernet.IpV4.Icmp.MessageType == IcmpMessageType.Echo || packet.Ethernet.IpV4.Fragmentation.Offset > 0))
{
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = ownHardwareAddress,
Destination = packet.Ethernet.Source,
EtherType = EthernetType.None,
};
IpV4Layer ipV4Layer = new IpV4Layer
{
Source = packet.Ethernet.IpV4.Destination,
CurrentDestination = packet.Ethernet.IpV4.Source,
Fragmentation = packet.Ethernet.IpV4.Fragmentation,
HeaderChecksum = null, // Will be filled automatically.
Identification = 123,
Options = packet.Ethernet.IpV4.Options,
Protocol = packet.Ethernet.IpV4.Protocol,
Ttl = packet.Ethernet.IpV4.Ttl,
TypeOfService = packet.Ethernet.IpV4.TypeOfService,
};
if (packet.Ethernet.IpV4.Fragmentation.Options == IpV4FragmentationOptions.DoNotFragment ||
packet.Ethernet.IpV4.Fragmentation.Options == IpV4FragmentationOptions.None && packet.Ethernet.IpV4.Fragmentation.Offset == 0)
{
byte[] icmpPacket = packet.Ethernet.IpV4.Payload.ToArray();
icmpPacket[0] = 0;
icmpPacket[2] = 0;
icmpPacket[3] = 0;
ushort checksum = IpFunctions.ComputeIpChecksum(icmpPacket);
icmpPacket[2] = (byte)(checksum >> 8);
icmpPacket[3] = (byte)(checksum & 0xff);
PayloadLayer payloadLayer = new PayloadLayer
{
Data = new Datagram(icmpPacket),
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, payloadLayer);
SendPacket(builder.Build(DateTime.Now));
}
else if (packet.Ethernet.IpV4.Fragmentation.Offset == 0 && packet.Ethernet.IpV4.Fragmentation.Options == IpV4FragmentationOptions.MoreFragments)
{
byte[] icmpHeader = packet.Ethernet.IpV4.Payload.ToArray();
icmpHeader[0] = 0;
icmpHeader[2] = 0;
icmpHeader[3] = 0;
int icmpPacketLength = icmpHeader.Length;
for (int i = 1; i < packetList.Count; i++)
{
icmpPacketLength += packetList[i].Ethernet.IpV4.Payload.ToArray().Length;
}
byte[] icmpPacket = new byte[icmpPacketLength];
Buffer.BlockCopy(icmpHeader, 0, icmpPacket, 0, icmpHeader.Length);
icmpPacketLength = icmpHeader.Length;
for (int i = 1; i < packetList.Count; i++)
{
Buffer.BlockCopy(packetList[i].Ethernet.IpV4.Payload.ToArray(), 0, icmpPacket, icmpPacketLength, packetList[i].Ethernet.IpV4.Payload.ToArray().Length);
icmpPacketLength += packetList[i].Ethernet.IpV4.Payload.ToArray().Length;
}
ushort checksum = IpFunctions.ComputeIpChecksum(icmpPacket);
icmpHeader[2] = (byte)(checksum >> 8);
icmpHeader[3] = (byte)(checksum & 0xff);
PayloadLayer payloadLayer = new PayloadLayer
{
Data = new Datagram(icmpHeader),
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, payloadLayer);
SendPacket(builder.Build(DateTime.Now));
}
else
{
PayloadLayer payloadLayer = new PayloadLayer
{
Data = new Datagram(packet.Ethernet.IpV4.Payload.ToArray()),
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, payloadLayer);
SendPacket(builder.Build(DateTime.Now));
}
}
}
else if (packet.Ethernet.IpV4.Source == ifProtocolAddress)
if ((packet.Ethernet.IpV4.Icmp.MessageType == IcmpMessageType.Echo || packet.Ethernet.IpV4.Fragmentation.Offset > 0))
{
{
tapRoutingObject = RoutingTable.GetInterface(packet);
if (tapRoutingObject.response == -1)
return;
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = physicalWorkers[tapRoutingObject.ifIndex].ifHardwareAddress,
Destination = physicalWorkers[tapRoutingObject.ifIndex].gatewayHardwareAddress,
EtherType = EthernetType.None,
};
IpV4Layer ipV4Layer = new IpV4Layer
{
Source = physicalWorkers[tapRoutingObject.ifIndex].ifProtocolAddress,
CurrentDestination = packet.Ethernet.IpV4.Destination,
Fragmentation = packet.Ethernet.IpV4.Fragmentation,
HeaderChecksum = null, // Will be filled automatically.
Identification = packet.Ethernet.IpV4.Identification,
Options = packet.Ethernet.IpV4.Options,
Protocol = packet.Ethernet.IpV4.Protocol,
Ttl = (byte)(packet.Ethernet.IpV4.Ttl - 1),
TypeOfService = packet.Ethernet.IpV4.TypeOfService,
};
PayloadLayer payloadLayer = new PayloadLayer
{
Data = new Datagram(packet.Ethernet.IpV4.Payload.ToArray()),
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, payloadLayer);
physicalWorkers[tapRoutingObject.ifIndex].SendPacket(builder.Build(DateTime.Now));
}
}
}
else if (packet.Ethernet.IpV4.Protocol == IpV4Protocol.Tcp)
{
if (packet.Ethernet.IpV4.Source == ifProtocolAddress)
{
tapRoutingObject = RoutingTable.GetInterface(packet);
if (tapRoutingObject.response == -1)
return;
if (tapRoutingObject.response == -3)
{
lock (RoutingTable.connParams[tapRoutingObject.guid])
SendAck(tapRoutingObject.guid);
return;
}
lock (RoutingTable.connParams[tapRoutingObject.guid])
{
RoutingTable.connParams[tapRoutingObject.guid].freeWindow = (int)((packet.Ethernet.IpV4.Tcp.Window << RoutingTable.connParams[tapRoutingObject.guid].windowScale) - (RoutingTable.connParams[tapRoutingObject.guid].seq - packet.Ethernet.IpV4.Tcp.AcknowledgmentNumber));
if (RoutingTable.connParams[tapRoutingObject.guid].windowFull)
{
if (RoutingTable.connParams[tapRoutingObject.guid].freeWindow > RoutingTable.connParams[tapRoutingObject.guid].bytesReceived)
{
SendData(tapRoutingObject.guid, RoutingTable.connParams[tapRoutingObject.guid].bytesReceived);
RoutingTable.connParams[tapRoutingObject.guid].freeWindow -= RoutingTable.connParams[tapRoutingObject.guid].bytesReceived;
RoutingTable.connParams[tapRoutingObject.guid].windowFull = false;
RoutingTable.connParams[tapRoutingObject.guid].UpdateSeq(RoutingTable.connParams[tapRoutingObject.guid].bytesReceived);
try
{
RoutingTable.connParams[tapRoutingObject.guid].socket.BeginReceive(RoutingTable.connParams[tapRoutingObject.guid].receivingBuffer, 0, RoutingTable.connParams[tapRoutingObject.guid].receivingBuffer.Count(), 0, new AsyncCallback(physicalWorkers[tapRoutingObject.ifIndex].ReceiveCallback), tapRoutingObject.guid);
}
catch (Exception)
{
RoutingTable.RequestAccess();
if (!RoutingTable.connStatus[tapRoutingObject.guid].remoteEPFin)
tapWorker.SendRst(tapRoutingObject.guid);
RoutingTable.connStatus[tapRoutingObject.guid].remoteEPFin = true;
RoutingTable.connStatus[tapRoutingObject.guid].localEPFin = true;
RoutingTable.ReleaseAccess();
}
}
}
}
if (packet.Ethernet.IpV4.Tcp.PayloadLength > 0 || tapRoutingObject.response == -2)
physicalWorkers[tapRoutingObject.ifIndex].SendData(packet, tapRoutingObject.guid);
}
}
else if (packet.Ethernet.IpV4.Protocol == IpV4Protocol.Udp)
{
if (packet.Ethernet.IpV4.Source == ifProtocolAddress)
{
tapRoutingObject = RoutingTable.GetInterface(packet);
if (tapRoutingObject.response == -1)
return;
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = physicalWorkers[tapRoutingObject.ifIndex].ifHardwareAddress,
Destination = physicalWorkers[tapRoutingObject.ifIndex].gatewayHardwareAddress,
EtherType = packet.Ethernet.EtherType,
};
IpV4Layer ipV4Layer = new IpV4Layer
{
Source = physicalWorkers[tapRoutingObject.ifIndex].ifProtocolAddress,
CurrentDestination = packet.Ethernet.IpV4.Destination,
Fragmentation = packet.Ethernet.IpV4.Fragmentation,
HeaderChecksum = null, // Will be filled automatically.
Identification = packet.Ethernet.IpV4.Identification,
Options = packet.Ethernet.IpV4.Options,
Protocol = packet.Ethernet.IpV4.Protocol,
Ttl = (byte)(packet.Ethernet.IpV4.Ttl - 1),
TypeOfService = packet.Ethernet.IpV4.TypeOfService,
};
UdpLayer udpLayer = new UdpLayer
{
SourcePort = packet.Ethernet.IpV4.Udp.SourcePort,
DestinationPort = packet.Ethernet.IpV4.Udp.DestinationPort,
Checksum = null, // Will be filled automatically.
CalculateChecksumValue = packet.Ethernet.IpV4.Udp.IsChecksumOptional,
};
PayloadLayer payloadLayer = new PayloadLayer
{
Data = new Datagram(packet.Ethernet.IpV4.Udp.Payload.ToArray()),
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, udpLayer, payloadLayer);
physicalWorkers[tapRoutingObject.ifIndex].SendPacket(builder.Build(DateTime.Now));
}
}
}
/// <summary>
/// This function build an TCP over IPv4 over Ethernet with payload packet.
/// </summary>
private static Packet BuildTcpPacket(MacAddress SourceMac, MacAddress DestinationMac, IpV4Layer ipV4Layer, TcpLayer tcpLayer, PayloadLayer payloadLayer)
{
EthernetLayer ethernetLayer =
new EthernetLayer
{
Source = SourceMac,
Destination = DestinationMac,
EtherType = EthernetType.None, // Will be filled automatically.
};
//IpV4Layer ipV4Layer =
// new IpV4Layer
// {
// Source = SourceIp,
// CurrentDestination = DestinatinIp,
// Fragmentation = IpV4Fragmentation.None,
// HeaderChecksum = null, // Will be filled automatically.
// Identification = 123,
// Options = IpV4Options.None,
// Protocol = null, // Will be filled automatically.
// Ttl = 100,
// TypeOfService = 0,
// };
//TcpLayer tcpLayer =
// new TcpLayer
// {
// SourcePort = 4050,
// DestinationPort = 25,
// Checksum = null, // Will be filled automatically.
// SequenceNumber = 100,
// AcknowledgmentNumber = 50,
// ControlBits = TcpControlBits.Acknowledgment,
// Window = 100,
// UrgentPointer = 0,
// Options = TcpOptions.None,
// };
//PayloadLayer payloadLayer =
// new PayloadLayer
// {
// Data = new Datagram(Encoding.ASCII.GetBytes("hello world")),
// };
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, tcpLayer, payloadLayer);
return builder.Build(DateTime.Now);
}
static void Main(string[] args)
{
// Send anonymous statistics about the usage of Pcap.Net
PcapDotNet.Analysis.PcapDotNetAnalysis.OptIn = true;
// Retrieve the device list from the local machine
IList<LivePacketDevice> allDevices = LivePacketDevice.AllLocalMachine;
if (allDevices.Count == 0)
{
Console.WriteLine("No interfaces found! Make sure WinPcap is installed.");
return;
}
// Print the list
for (int i = 0; i != allDevices.Count; ++i)
{
LivePacketDevice device = allDevices[i];
Console.Write((i + 1) + ". " + device.Name);
if (device.Description != null)
Console.WriteLine(" (" + device.Description + ")");
else
Console.WriteLine(" (No description available)");
}
int deviceIndex = 0;
do
{
Console.WriteLine("Enter the interface number (1-" + allDevices.Count + "):");
string deviceIndexString = Console.ReadLine();
if (!int.TryParse(deviceIndexString, out deviceIndex) ||
deviceIndex < 1 || deviceIndex > allDevices.Count)
{
deviceIndex = 0;
}
} while (deviceIndex == 0);
// Take the selected adapter
PacketDevice selectedDevice = allDevices[deviceIndex - 1];
// Open the output device
using (PacketCommunicator communicator = selectedDevice.Open(100, // name of the device
PacketDeviceOpenAttributes.Promiscuous, // promiscuous mode
1000)) // read timeout
{
// Supposing to be on ethernet, set mac source to 1:1:1:1:1:1
MacAddress source = new MacAddress("1:1:1:1:1:1");
// set mac destination to 2:2:2:2:2:2
MacAddress destination = new MacAddress("2:2:2:2:2:2");
// Create the packets layers
// Ethernet Layer
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = source,
Destination = destination
};
// IPv4 Layer
IpV4Layer ipV4Layer = new IpV4Layer
{
Source = new IpV4Address("1.2.3.4"),
Ttl = 128,
// The rest of the important parameters will be set for each packet
};
// ICMP Layer
IcmpEchoLayer icmpLayer = new IcmpEchoLayer();
// Create the builder that will build our packets
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, icmpLayer);
// Send 100 Pings to different destination with different parameters
for (int i = 0; i != 100; ++i)
{
// Set IPv4 parameters
ipV4Layer.Destination = new IpV4Address("2.3.4." + i);
ipV4Layer.Identification = (ushort)i;
// Set ICMP parameters
icmpLayer.SequenceNumber = (ushort)i;
icmpLayer.Identifier = (ushort)i;
// Build the packet
Packet packet = builder.Build(DateTime.Now);
// Send down the packet
communicator.SendPacket(packet);
}
}
}
private void buttonSend00_Click(object sender, EventArgs e)
{
PacketDevice senderDevice = LivePacketDevice.AllLocalMachine[comboInterface.SelectedIndex];
using (PacketCommunicator communicator = senderDevice.Open(100, PacketDeviceOpenAttributes.Promiscuous, 1000))
{
for (int j = 0; j < 1; j++)
{
MacAddress sourceMac = new MacAddress(textSourceMac.Text);
MacAddress destinationMac = new MacAddress(textDestinationMac.Text);
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = sourceMac,
Destination = destinationMac
};
IpV4Layer ipv4Layer = new IpV4Layer
{
Source = new IpV4Address(textSourceIP.Text),
CurrentDestination = new IpV4Address(textDestinationIP.Text),
HeaderChecksum = null,
Identification = 123,
Options = IpV4Options.None,
Protocol = null,
Ttl = 100,
TypeOfService = 0,
};
UdpLayer udpLayer = new UdpLayer
{
SourcePort = (ushort)Convert.ToUInt16(textSourcePort.Text),
DestinationPort = (ushort)Convert.ToUInt16(textDestinationPort.Text),
Checksum = null,
CalculateChecksumValue = true,
};
byte[] buff = new byte[128];
// goo size
//byte[] buff = new byte[192];
// monlist
buff[0] = 0x17;
buff[1] = 0x00;
buff[2] = 0x03;
// monlist
buff[3] = 0x2a;
// memstats
// buff[3] = 0x07;
PayloadLayer payloadLayer = new PayloadLayer
{
Data = new Datagram(buff),
// Data = new Datagram(Encoding.ASCII.GetBytes("hello world")),
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipv4Layer, udpLayer, payloadLayer);
communicator.SendPacket(builder.Build(DateTime.Now));
}
}
}
/// <summary>
/// True iff the two IPv4 layers have the same TypeOfService, Identification, Fragmentation, Ttl, Protocol, HeaderChecksum, Source, Destination and Options.
/// </summary>
public bool Equals(IpV4Layer other)
{
return other != null &&
TypeOfService == other.TypeOfService && Identification == other.Identification &&
Fragmentation == other.Fragmentation && Ttl == other.Ttl &&
Protocol == other.Protocol &&
HeaderChecksum == other.HeaderChecksum &&
Source == other.Source && CurrentDestination == other.CurrentDestination &&
Options.Equals(other.Options);
}
private void InitializePackets()
{
//Fill with dummy data
_ethernetLayer =
new EthernetLayer
{
Source = new MacAddress("01:01:01:01:01:01"),
Destination = new MacAddress("02:02:02:02:02:02"),
EtherType = EthernetType.None, // Will be filled automatically.
};
_ipV4Layer =
new IpV4Layer
{
Source = new IpV4Address("1.2.3.4"),
CurrentDestination = new IpV4Address("11.22.33.44"),
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null, // Will be filled automatically.
Identification = 123,
Options = IpV4Options.None,
Protocol = null, // Will be filled automatically.
Ttl = 100,
TypeOfService = 0,
};
_tcpLayer =
new TcpLayer
{
SourcePort = 4050,
DestinationPort = 25,
Checksum = null, // Will be filled automatically.
SequenceNumber = 100,
AcknowledgmentNumber = 50,
ControlBits = TcpControlBits.Acknowledgment,
Window = 100,
UrgentPointer = 0,
Options = TcpOptions.None,
};
_payloadLayer =
new PayloadLayer
{
Data = new Datagram(Encoding.ASCII.GetBytes("CAM Flooding Packet")),
};
}
public static void WakeDestination(string macAddress)
{
IList<LivePacketDevice> allDevices = LivePacketDevice.AllLocalMachine;
if (allDevices.Count == 0)
{
throw new Exception("No interfaces found! Make sure WinPcap is installed.");
}
foreach (var selectedDevice in allDevices)
{
using (var communicator = selectedDevice.Open(100,
PacketDeviceOpenAttributes.Promiscuous,
1000))
{
var ipV4SocketAddresses = from d in selectedDevice.Addresses
where d.Address is IpV4SocketAddress
select
new
{
((IpV4SocketAddress)d.Address).Address,
Broadcast = ((IpV4SocketAddress)d.Broadcast).Address
};
foreach (var deviceAddress in ipV4SocketAddresses)
{
var ethernetLayer =
new EthernetLayer
{
Source = selectedDevice.GetMacAddress(),
Destination = new MacAddress(macAddress),
EtherType = EthernetType.None // Will be filled automatically.
};
var ipV4Layer =
new IpV4Layer
{
Source = deviceAddress.Address,
CurrentDestination = deviceAddress.Broadcast,
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null, // Will be filled automatically.
Identification = 123,
Options = IpV4Options.None,
Protocol = null, // Will be filled automatically.
Ttl = 100,
TypeOfService = 0
};
var udpLayer =
new UdpLayer
{
DestinationPort = 7,
Checksum = null, // Will be filled automatically.
CalculateChecksumValue = true
};
var payloadLayer =
new PayloadLayer
{
Data = new Datagram(BuildWolPacketBody(macAddress))
};
var builder = new PacketBuilder(ethernetLayer, ipV4Layer, udpLayer, payloadLayer);
var packet = builder.Build(DateTime.Now);
communicator.SendPacket(packet);
}
}
}
}
private static void CreateRandomIpV4Payload(Random random, IpV4Layer ipV4Layer, List<ILayer> layers)
{
if (random.NextBool(20))
{
// Finish with payload.
PayloadLayer payloadLayer = random.NextPayloadLayer(random.Next(100));
layers.Add(payloadLayer);
return;
}
ipV4Layer.Protocol = null;
if (random.NextBool())
ipV4Layer.Fragmentation = IpV4Fragmentation.None;
switch (random.Next(0, 9))
{
case 0: // IpV4.
case 1:
IpV4Layer innerIpV4Layer = random.NextIpV4Layer();
layers.Add(innerIpV4Layer);
CreateRandomIpV4Payload(random, innerIpV4Layer, layers);
return;
case 2: // Igmp.
layers.Add(random.NextIgmpLayer());
return;
case 3: // Icmp.
IcmpLayer icmpLayer = random.NextIcmpLayer();
layers.Add(icmpLayer);
layers.AddRange(random.NextIcmpPayloadLayers(icmpLayer));
return;
case 4: // Gre.
GreLayer greLayer = random.NextGreLayer();
layers.Add(greLayer);
CreateRandomEthernetPayload(random, greLayer, layers);
return;
case 5: // Udp.
case 6:
UdpLayer udpLayer = random.NextUdpLayer();
layers.Add(udpLayer);
CreateRandomUdpPayload(random, udpLayer, layers);
return;
case 7: // Tcp.
case 8:
TcpLayer tcpLayer = random.NextTcpLayer();
layers.Add(tcpLayer);
CreateRandomTcpPayload(random, tcpLayer, layers);
return;
default:
throw new InvalidOperationException("Invalid value.");
}
}
//# Método de pcapDotNet, construcción de paquete IP, UDP, Ethernet y finalmente payload:
private Packet BuildUdpPacket(byte[] bytes_a_enviar)
{
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = new MacAddress(this.mac_origen),
Destination = new MacAddress(this.mac_destino),
EtherType = EthernetType.IpV4,
};
IpV4Layer ipV4Layer = new IpV4Layer
{
Source = new IpV4Address(this.ip_origen),
CurrentDestination = new IpV4Address(this.ip_destino),
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null,
Identification = 123,
Options = IpV4Options.None,
Protocol = null,
Ttl = 100,
TypeOfService = 0,
};
UdpLayer udpLayer = new UdpLayer
{
SourcePort = (ushort)this.puerto_origen,
DestinationPort = (ushort)this.puerto_destino,
Checksum = null,
CalculateChecksumValue = true,
};
PayloadLayer payloadLayer = new PayloadLayer
{
Data = new Datagram(bytes_a_enviar),
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, udpLayer, payloadLayer);
return builder.Build(DateTime.Now);
}
private void CreateRequestReply()
{
if (_streamReply != null)
{
_streamReply.Close();
byte[] data = _streamReply.ToArray();
_streamReply = null;
EthernetLayer ethernetLayer = new EthernetLayer { Source = _tcpConnection.Destination.MacAddress, Destination = _tcpConnection.Source.MacAddress };
IpV4Layer ipV4Layer = new IpV4Layer
{
Source = _tcpConnection.Destination.IpAddress,
CurrentDestination = _tcpConnection.Source.IpAddress,
Fragmentation = IpV4Fragmentation.None,
//HeaderChecksum = null, // Will be filled automatically.
Identification = 123,
Options = IpV4Options.None,
//Protocol = null, // Will be filled automatically.
Ttl = 100,
TypeOfService = 0
};
TcpLayer tcpLayer = new TcpLayer()
{
SourcePort = _tcpConnection.Destination.Port,
DestinationPort = _tcpConnection.Source.Port,
//Checksum = null, // Will be filled automatically.
SequenceNumber = 100,
AcknowledgmentNumber = 50,
ControlBits = TcpControlBits.Acknowledgment,
Window = 100,
UrgentPointer = 0,
Options = TcpOptions.None
};
PayloadLayer payloadLayer = new PayloadLayer { Data = new Datagram(data) };
PacketBuilder packetBuilder = new PacketBuilder(ethernetLayer, ipV4Layer, tcpLayer, payloadLayer);
if (PacketHandle != null)
PacketHandle(TcpDirection.DestinationToSource, packetBuilder.Build(_replyTimestamp));
_replyTimestamp = DateTime.MinValue;
}
}
public static void Test_SendPacket_01(string deviceName = null)
{
//// Retrieve the device list from the local machine
//IList<LivePacketDevice> allDevices = LivePacketDevice.AllLocalMachine;
//if (allDevices.Count == 0)
//{
// Console.WriteLine("No interfaces found! Make sure WinPcap is installed.");
// return;
//}
//// Print the list
//for (int i = 0; i != allDevices.Count; ++i)
//{
// LivePacketDevice device = allDevices[i];
// Console.Write((i + 1) + ". " + device.Name);
// if (device.Description != null)
// Console.WriteLine(" (" + device.Description + ")");
// else
// Console.WriteLine(" (No description available)");
//}
//int deviceIndex = 0;
//do
//{
// Console.WriteLine("Enter the interface number (1-" + allDevices.Count + "):");
// string deviceIndexString = Console.ReadLine();
// if (!int.TryParse(deviceIndexString, out deviceIndex) ||
// deviceIndex < 1 || deviceIndex > allDevices.Count)
// {
// deviceIndex = 0;
// }
//} while (deviceIndex == 0);
//// Take the selected adapter
//PacketDevice selectedDevice = allDevices[deviceIndex - 1];
PacketDevice device = SelectDevice(deviceName);
// Open the output device, promiscuous mode
using (PacketCommunicator communicator = device.Open(100, PacketDeviceOpenAttributes.Promiscuous, 1000))
{
// Supposing to be on ethernet, set mac source to 01:01:01:01:01:01
MacAddress source = new MacAddress("01:01:01:01:01:01");
// set mac destination to 02:02:02:02:02:02
MacAddress destination = new MacAddress("02:02:02:02:02:02");
// Create the packets layers
// Ethernet Layer
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = source,
Destination = destination
};
// IPv4 Layer
IpV4Layer ipV4Layer = new IpV4Layer
{
Source = new IpV4Address("1.2.3.4"),
Ttl = 128,
// The rest of the important parameters will be set for each packet
};
// ICMP Layer
IcmpEchoLayer icmpLayer = new IcmpEchoLayer();
// Create the builder that will build our packets
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, icmpLayer);
// Send 100 Pings to different destination with different parameters
for (int i = 0; i != 100; ++i)
{
// Set IPv4 parameters
ipV4Layer.CurrentDestination = new IpV4Address("2.3.4." + i);
ipV4Layer.Identification = (ushort)i;
// Set ICMP parameters
icmpLayer.SequenceNumber = (ushort)i;
icmpLayer.Identifier = (ushort)i;
// Build the packet
Packet packet = builder.Build(DateTime.Now);
// Send down the packet
communicator.SendPacket(packet);
}
communicator.SendPacket(BuildEthernetPacket());
communicator.SendPacket(BuildArpPacket());
communicator.SendPacket(BuildVLanTaggedFramePacket());
communicator.SendPacket(BuildIpV4Packet());
communicator.SendPacket(BuildIcmpPacket());
communicator.SendPacket(BuildIgmpPacket());
communicator.SendPacket(BuildGrePacket());
communicator.SendPacket(BuildUdpPacket());
communicator.SendPacket(BuildTcpPacket());
communicator.SendPacket(BuildDnsPacket());
communicator.SendPacket(BuildHttpPacket());
communicator.SendPacket(BuildComplexPacket());
}
}
static void msearch_spoof(PacketDevice selectedDevice, String source_ip, UInt16 port)
{
String msearch_string = "M-SEARCH * HTTP/1.1\r\nHOST:239.255.255.250:1900\r\nST: ssdp:all\r\nMAN: \"ssdp:discover\"\r\nMX:2\r\n\r\n";
byte[] temp = System.Text.Encoding.ASCII.GetBytes(msearch_string);
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = new MacAddress(),
Destination = new MacAddress("01:00:5E:7F:FF:FA"),
EtherType = EthernetType.None,
};
IpV4Layer ipV4Layer = new IpV4Layer
{
Source = new IpV4Address(source_ip),
CurrentDestination = new IpV4Address("239.255.255.250"),
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null,
Identification = 1,
Options = IpV4Options.None,
Protocol = null,
Ttl = 64,
TypeOfService = 0,
};
UdpLayer udpLayer = new UdpLayer
{
SourcePort = port,
DestinationPort = 1900,
Checksum = null,
CalculateChecksumValue = true,
};
PayloadLayer payloadLayer = new PayloadLayer
{
Data = new Datagram(temp),
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, udpLayer, payloadLayer);
using (PacketCommunicator communicator = selectedDevice.Open(69559, PacketDeviceOpenAttributes.Promiscuous, 1000)) // read timeout
{
communicator.SendPacket(builder.Build(DateTime.Now));
}
}
/// <summary>
/// This function build an IGMP over IPv4 over Ethernet packet.
/// </summary>
private static Packet BuildIgmpPacket()
{
EthernetLayer ethernetLayer =
new EthernetLayer
{
Source = new MacAddress("01:01:01:01:01:01"),
Destination = new MacAddress("02:02:02:02:02:02"),
EtherType = EthernetType.None, // Will be filled automatically.
};
IpV4Layer ipV4Layer =
new IpV4Layer
{
Source = new IpV4Address("1.2.3.4"),
CurrentDestination = new IpV4Address("11.22.33.44"),
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null, // Will be filled automatically.
Identification = 123,
Options = IpV4Options.None,
Protocol = null, // Will be filled automatically.
Ttl = 100,
TypeOfService = 0,
};
IgmpQueryVersion1Layer igmpLayer =
new IgmpQueryVersion1Layer
{
GroupAddress = new IpV4Address("1.2.3.4"),
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, igmpLayer);
return builder.Build(DateTime.Now);
}
private static void preparePcap()
{
var source = new MacAddress(getClientMAC());
var dest = new MacAddress(getRouterMAC());
device = LivePacketDevice.AllLocalMachine[0];
communicator = device.Open(100, PacketDeviceOpenAttributes.Promiscuous, 1000);
EthernetLayer ethLayer = new EthernetLayer { Source = source, Destination = dest };
ipLayer = new IpV4Layer { Source = new IpV4Address(LocalIPAddress()), Ttl = 128 };
icmpLayer = new IcmpEchoLayer();
icmpBuilder = new PacketBuilder(ethLayer, ipLayer, icmpLayer);
TCPLayer = new TcpLayer();
TCPBuilder = new PacketBuilder(ethLayer, ipLayer, TCPLayer);
if (!TCPMode)
{
communicator.SetFilter("icmp[0] = 0");
}
else
{
//tcp[13] = 18
communicator.SetFilter("tcp[13] = 18 and port " + TCPPort);
}
}
/// <summary>
/// This function build an IPv4 over GRE over IPv4 over Ethernet packet.
/// </summary>
private static Packet BuildGrePacket()
{
EthernetLayer ethernetLayer =
new EthernetLayer
{
Source = new MacAddress("01:01:01:01:01:01"),
Destination = new MacAddress("02:02:02:02:02:02"),
EtherType = EthernetType.None, // Will be filled automatically.
};
IpV4Layer ipV4Layer =
new IpV4Layer
{
Source = new IpV4Address("1.2.3.4"),
CurrentDestination = new IpV4Address("11.22.33.44"),
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null, // Will be filled automatically.
Identification = 123,
Options = IpV4Options.None,
Protocol = null, // Will be filled automatically.
Ttl = 100,
TypeOfService = 0,
};
GreLayer greLayer =
new GreLayer
{
Version = GreVersion.Gre,
ProtocolType = EthernetType.None, // Will be filled automatically.
RecursionControl = 0,
FutureUseBits = 0,
ChecksumPresent = true,
Checksum = null, // Will be filled automatically.
Key = null,
SequenceNumber = 123,
AcknowledgmentSequenceNumber = null,
RoutingOffset = null,
Routing = null,
StrictSourceRoute = false,
};
IpV4Layer innerIpV4Layer =
new IpV4Layer
{
Source = new IpV4Address("100.200.201.202"),
CurrentDestination = new IpV4Address("123.254.132.40"),
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null, // Will be filled automatically.
Identification = 123,
Options = IpV4Options.None,
Protocol = IpV4Protocol.Udp,
Ttl = 120,
TypeOfService = 0,
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, greLayer, innerIpV4Layer);
return builder.Build(DateTime.Now);
}
public void IpV4LayerNullChecksumAndProtocolGetHashCodeTest()
{
IpV4Layer layer = new IpV4Layer
{
HeaderChecksum = null,
Protocol = null,
};
Assert.IsNotNull(layer.GetHashCode());
}
/// <summary>
/// This function build an UDP over IPv4 over Ethernet with payload packet.
/// </summary>
private static Packet BuildUdpPacket()
{
EthernetLayer ethernetLayer =
new EthernetLayer
{
Source = new MacAddress("01:01:01:01:01:01"),
Destination = new MacAddress("02:02:02:02:02:02"),
EtherType = EthernetType.None, // Will be filled automatically.
};
IpV4Layer ipV4Layer =
new IpV4Layer
{
Source = new IpV4Address("1.2.3.4"),
CurrentDestination = new IpV4Address("11.22.33.44"),
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null, // Will be filled automatically.
Identification = 123,
Options = IpV4Options.None,
Protocol = null, // Will be filled automatically.
Ttl = 100,
TypeOfService = 0,
};
UdpLayer udpLayer =
new UdpLayer
{
SourcePort = 4050,
DestinationPort = 25,
Checksum = null, // Will be filled automatically.
CalculateChecksumValue = true,
};
PayloadLayer payloadLayer =
new PayloadLayer
{
Data = new Datagram(Encoding.ASCII.GetBytes("hello world")),
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, udpLayer, payloadLayer);
return builder.Build(DateTime.Now);
}
private static Packet BuildIcmpPacket(MacAddress SourceMac, MacAddress DestinationMac, IpV4Address SourceIp, IpV4Address CurrentDestination, string packetType)
{
EthernetLayer ethernetLayer =
new EthernetLayer
{
Source = SourceMac,
Destination = DestinationMac,
EtherType = EthernetType.None, // Will be filled automatically.
};
IpV4Layer ipV4Layer =
new IpV4Layer
{
//Source = new IpV4Address("1.2.3.4"),
//CurrentDestination = new IpV4Address("11.22.33.44"),
Source = SourceIp,
CurrentDestination = CurrentDestination,
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null, // Will be filled automatically.
Identification = 123,
Options = IpV4Options.None,
Protocol = null, // Will be filled automatically.
Ttl = 100,
TypeOfService = 0,
};
IcmpEchoLayer icmpLayer = null;
IcmpEchoReplyLayer icmpRLayer = null;
PacketBuilder builder = null;
if (packetType.Equals("REQUEST"))
{
Console.WriteLine("Request");
icmpLayer =
new IcmpEchoLayer
{
Checksum = null, // Will be filled automatically.
Identifier = 456,
SequenceNumber = 800,
};
builder = new PacketBuilder(ethernetLayer, ipV4Layer, icmpLayer);
}
else
{
Console.WriteLine("Reply");
icmpRLayer =
new IcmpEchoReplyLayer
{
Checksum = null, // Will be filled automatically.
Identifier = 456,
SequenceNumber = 800,
};
builder = new PacketBuilder(ethernetLayer, ipV4Layer, icmpRLayer);
}
return builder.Build(DateTime.Now);
}
/// <summary>
/// This function build an TCP over IPv4 over Ethernet with payload packet.
/// </summary>
private static Packet BuildTcpPacket()
{
EthernetLayer ethernetLayer =
new EthernetLayer
{
Source = new MacAddress("01:01:01:01:01:01"),
Destination = new MacAddress("02:02:02:02:02:02"),
EtherType = EthernetType.None, // Will be filled automatically.
};
IpV4Layer ipV4Layer =
new IpV4Layer
{
Source = new IpV4Address("1.2.3.4"),
CurrentDestination = new IpV4Address("11.22.33.44"),
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null, // Will be filled automatically.
Identification = 123,
Options = IpV4Options.None,
Protocol = null, // Will be filled automatically.
Ttl = 100,
TypeOfService = 0,
};
TcpLayer tcpLayer =
new TcpLayer
{
SourcePort = 4050,
DestinationPort = 25,
Checksum = null, // Will be filled automatically.
SequenceNumber = 100,
AcknowledgmentNumber = 50,
ControlBits = TcpControlBits.Acknowledgment,
Window = 100,
UrgentPointer = 0,
Options = TcpOptions.None,
};
PayloadLayer payloadLayer =
new PayloadLayer
{
Data = new Datagram(Encoding.ASCII.GetBytes("hello world")),
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, tcpLayer, payloadLayer);
return builder.Build(DateTime.Now);
}
private static void DiscoverNetworkBroadcast(PacketCommunicator communicator, MyDevice device)
{
// Supposing to be on ethernet, set mac source
MacAddress source = new MacAddress(device.MacAddressWithDots());
// set mac destination to broadcast
MacAddress destination = new MacAddress("FF:FF:FF:FF:FF:FF");
// Create the packets layers
// Ethernet Layer
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = source,
Destination = destination
};
// IPv4 Layer
IpV4Layer ipV4Layer = new IpV4Layer
{
Source = new IpV4Address(device.IPAddress),
Ttl = 128,
// The rest of the important parameters will be set for each packet
};
// ICMP Layer
IcmpEchoLayer icmpLayer = new IcmpEchoLayer();
// Create the builder that will build our packets
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, icmpLayer);
string ipBeg = device.IpWithoutEnd();
//Send 100 Pings to different destination with different parameters
for (int i = 0; i < 256; i++)
{
// Set IPv4 parameters
ipV4Layer.CurrentDestination = new IpV4Address(ipBeg + i);
ipV4Layer.Identification = (ushort)i;
// Set ICMP parameters
icmpLayer.SequenceNumber = (ushort)i;
icmpLayer.Identifier = (ushort)i;
// Build the packet
Packet packet = builder.Build(DateTime.Now);
// Send down the packet
communicator.SendPacket(packet);
//Console.WriteLine("172.16.1." + i);
}
}
/// <summary>
/// This function build a DNS over UDP over IPv4 over Ethernet packet.
/// </summary>
private static Packet BuildDnsPacket()
{
EthernetLayer ethernetLayer =
new EthernetLayer
{
Source = new MacAddress("01:01:01:01:01:01"),
Destination = new MacAddress("02:02:02:02:02:02"),
EtherType = EthernetType.None, // Will be filled automatically.
};
IpV4Layer ipV4Layer =
new IpV4Layer
{
Source = new IpV4Address("1.2.3.4"),
CurrentDestination = new IpV4Address("11.22.33.44"),
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null, // Will be filled automatically.
Identification = 123,
Options = IpV4Options.None,
Protocol = null, // Will be filled automatically.
Ttl = 100,
TypeOfService = 0,
};
UdpLayer udpLayer =
new UdpLayer
{
SourcePort = 4050,
DestinationPort = 53,
Checksum = null, // Will be filled automatically.
CalculateChecksumValue = true,
};
DnsLayer dnsLayer =
new DnsLayer
{
Id = 100,
IsResponse = false,
OpCode = DnsOpCode.Query,
IsAuthoritativeAnswer = false,
IsTruncated = false,
IsRecursionDesired = true,
IsRecursionAvailable = false,
FutureUse = false,
IsAuthenticData = false,
IsCheckingDisabled = false,
ResponseCode = DnsResponseCode.NoError,
Queries = new[]
{
new DnsQueryResourceRecord(new DnsDomainName("pcapdot.net"),
DnsType.A,
DnsClass.Internet),
},
Answers = null,
Authorities = null,
Additionals = null,
DomainNameCompressionMode = DnsDomainNameCompressionMode.All,
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, udpLayer, dnsLayer);
return builder.Build(DateTime.Now);
}
public void SendData(Guid guid, int payloadLength)
{
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = ownHardwareAddress,
Destination = ifHardwareAddress,
EtherType = EthernetType.None,
};
IpV4Layer ipV4Layer = new IpV4Layer
{
Source = RoutingTable.connParams[guid].remoteIp,
CurrentDestination = ifProtocolAddress,
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null, // Will be filled automatically.
Identification = ipID,
Options = IpV4Options.None,
Protocol = IpV4Protocol.Tcp,
Ttl = 128,
TypeOfService = 0,
};
TcpLayer tcpLayer = new TcpLayer
{
SourcePort = RoutingTable.connParams[guid].remotePort,
DestinationPort = RoutingTable.connParams[guid].localPort,
Checksum = null, // Will be filled automatically.
SequenceNumber = RoutingTable.connParams[guid].seq,
AcknowledgmentNumber = RoutingTable.connParams[guid].ack,
ControlBits = TcpControlBits.Acknowledgment,
Window = RoutingTable.connParams[guid].GetWindow(),
UrgentPointer = 0,
Options = TcpOptions.None,
};
PayloadLayer payloadLayer = new PayloadLayer
{
Data = new Datagram(RoutingTable.connParams[guid].receivingBuffer.Take(payloadLength).ToArray()),
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, tcpLayer, payloadLayer);
SendPacket(builder.Build(DateTime.Now));
}
/// <summary>
/// This function build an HTTP over TCP over IPv4 over Ethernet packet.
/// </summary>
private static Packet BuildHttpPacket()
{
EthernetLayer ethernetLayer =
new EthernetLayer
{
Source = new MacAddress("01:01:01:01:01:01"),
Destination = new MacAddress("02:02:02:02:02:02"),
EtherType = EthernetType.None, // Will be filled automatically.
};
IpV4Layer ipV4Layer =
new IpV4Layer
{
Source = new IpV4Address("1.2.3.4"),
CurrentDestination = new IpV4Address("11.22.33.44"),
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null, // Will be filled automatically.
Identification = 123,
Options = IpV4Options.None,
Protocol = null, // Will be filled automatically.
Ttl = 100,
TypeOfService = 0,
};
TcpLayer tcpLayer =
new TcpLayer
{
SourcePort = 4050,
DestinationPort = 80,
Checksum = null, // Will be filled automatically.
SequenceNumber = 100,
AcknowledgmentNumber = 50,
ControlBits = TcpControlBits.Acknowledgment,
Window = 100,
UrgentPointer = 0,
Options = TcpOptions.None,
};
HttpRequestLayer httpLayer =
new HttpRequestLayer
{
Version = HttpVersion.Version11,
Header = new HttpHeader(new HttpContentLengthField(11)),
Body = new Datagram(Encoding.ASCII.GetBytes("hello world")),
Method = new HttpRequestMethod(HttpRequestKnownMethod.Get),
Uri = @"http://pcapdot.net/",
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, tcpLayer, httpLayer);
return builder.Build(DateTime.Now);
}
void BuildingTcpPacket()
{
ethernetLayer = new EthernetLayer
{
Source = new MacAddress( ToMac( _ownMacAddress.ToString() ) ),
EtherType = EthernetType.None, // Will be filled automatically.
};
ipV4Layer = new IpV4Layer
{
Source = new IpV4Address( new IPAddress( _ownIpAddress ).ToString() ),
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null, // Will be filled automatically.
Identification = 0,
Options = IpV4Options.None,
Protocol = null, // Will be filled automatically.
Ttl = 100,
TypeOfService = 0,
};
tcpLayer = new TcpLayer
{
SourcePort = 62000,
Checksum = null, // Will be filled automatically.
SequenceNumber = 100,
AcknowledgmentNumber = 0,
ControlBits = TcpControlBits.Synchronize,
Window = 8192,
UrgentPointer = 0,
Options = new TcpOptions( new TcpOptionMaximumSegmentSize( 1460 ), TcpOption.Nop, new TcpOptionWindowScale( 2 ), new TcpOptionSelectiveAcknowledgmentPermitted(), new TcpOptionTimestamp( (uint)DateTime.Now.Ticks, 0 ) ),
};
}
static void msearch_response_spoof(LivePacketDevice selectedDevice, string msearch_string, string sourceIP, ushort sourcePort, string destIP, ushort destPort, string destMac)
{
byte[] temp = System.Text.Encoding.ASCII.GetBytes(msearch_string);
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = LivePacketDeviceExtensions.GetMacAddress(selectedDevice),
Destination = new MacAddress(destMac),
EtherType = EthernetType.None,
};
var options = IpV4FragmentationOptions.DoNotFragment;
IpV4Layer ipV4Layer = new IpV4Layer
{
Source = new IpV4Address(sourceIP),
CurrentDestination = new IpV4Address(destIP),
Fragmentation = new IpV4Fragmentation(options,0),
HeaderChecksum = null,
Identification = 0,
Options = IpV4Options.None,
Protocol = null,
Ttl = 64,
TypeOfService = 0,
};
UdpLayer udpLayer = new UdpLayer
{
SourcePort = sourcePort,
DestinationPort = destPort,
Checksum = null,
CalculateChecksumValue = true,
};
PayloadLayer payloadLayer = new PayloadLayer
{
Data = new Datagram(temp),
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, udpLayer, payloadLayer);
using (PacketCommunicator communicator = selectedDevice.Open(69559, PacketDeviceOpenAttributes.Promiscuous, 1000)) // read timeout
{
communicator.SendPacket(builder.Build(DateTime.Now));
}
}
/// <summary>
/// This function build an ICMP over IPv4 over Ethernet packet.
/// </summary>
public Packet BuildIcmpPacket( string TargetIpAddress, string RouterMacAddress )
{
EthernetLayer ethernetLayer =
new EthernetLayer
{
Source = new MacAddress( ToMac( _ownMacAddress.ToString() ) ),
Destination = new MacAddress( ToMac( RouterMacAddress.ToString() ) ),
EtherType = EthernetType.None, // Will be filled automatically.
};
IpV4Layer ipV4Layer =
new IpV4Layer
{
Source = new IpV4Address( new IPAddress( _ownIpAddress ).ToString() ),
CurrentDestination = new IpV4Address( TargetIpAddress ),
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null, // Will be filled automatically.
Identification = 123,
Options = IpV4Options.None,
Protocol = null, // Will be filled automatically.
Ttl = 100,
TypeOfService = 0,
};
IcmpEchoLayer icmpLayer =
new IcmpEchoLayer
{
Checksum = null, // Will be filled automatically.
Identifier = 456,
SequenceNumber = 800,
};
PacketBuilder builder = new PacketBuilder( ethernetLayer, ipV4Layer, icmpLayer );
return builder.Build( DateTime.Now );
}
public Packet CreateDnsReply(EthernetDatagram etherpacket, IpV4Address newAddress)
{
var ipPacket = etherpacket.IpV4;
var udpPacket = ipPacket.Udp;
var dnsPacket = udpPacket.Dns;
if (!dnsPacket.IsQuery)
throw new Exception("Packet should be a dns query!");
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = etherpacket.Destination,
Destination = etherpacket.Source,
};
IpV4Layer ipLayer = new IpV4Layer
{
Source = ipPacket.Destination,
CurrentDestination = ipPacket.Source,
};
UdpLayer udpLayer = new UdpLayer
{
SourcePort = udpPacket.DestinationPort,
DestinationPort = udpPacket.SourcePort
};
DnsResourceData resourceData = new DnsResourceDataIpV4(newAddress);
DnsDataResourceRecord resourceRecord = new DnsDataResourceRecord(dnsPacket.Queries[0].DomainName,
dnsPacket.Queries[0].DnsType,
dnsPacket.Queries[0].DnsClass,
60,
resourceData);
DnsLayer dnsLayer = new DnsLayer
{
Queries = dnsPacket.Queries,
IsQuery = false,
IsResponse = true,
Id = dnsPacket.Id,
Answers = new[] { resourceRecord }
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipLayer, udpLayer, dnsLayer);
return builder.Build(DateTime.Now);
}