public void SendLayer3Packet(OSI.Layer3Packet packet, PacketSentHandler callback)
{
IpV4Layer ipV4Layer = new IpV4Layer
{
Source = new IpV4Address(packet.SourceIP.AsString),
Ttl = packet.Ttl,
// The rest of the important parameters will be set for each packet
};
Common.IPv4Address ip = null;
try
{
System.Net.IPAddress.Parse(packet.Destination);
ip = new Common.IPv4Address(packet.Destination);
}
catch
{
ip = Dns.ResolveHost(packet.Destination).IPs[0];
}
ipV4Layer.CurrentDestination = new IpV4Address(ip.AsString);
OSI.Layer2Packet l2 = new OSI.Layer2Packet();
l2.SourceMac = Configuration.MacAddress;
l2.DestinationMac = Arp.ResolveIP(ip);
foreach (ILayer layer in packet.NextLayers)
{
l2.NextLayers.Add(layer);
}
l2.NextLayers.Insert(0, ipV4Layer);
SendLayer2Packet(l2, callback);
}
public void SendLayer2Packet(OSI.Layer2Packet packet, PacketSentHandler callback)
{
EthernetLayer ethernetLayer =
new EthernetLayer
{
Source = new MacAddress(packet.SourceMac.AsString),
Destination = new MacAddress(packet.DestinationMac.AsString),
EtherType = EthernetType.None, // Will be filled automatically.
};
List <ILayer> layers = new List <ILayer>(packet.NextLayers);
layers.Insert(0, ethernetLayer);
Packet pack = PacketBuilder.Build(DateTime.Now, layers.ToArray());
SendPacket(pack, callback);
}
public void SendGratuitousArpRequest()
{
PcapDotNet.Packets.Arp.ArpLayer arpLayer =
new PcapDotNet.Packets.Arp.ArpLayer
{
ProtocolType = PcapDotNet.Packets.Ethernet.EthernetType.IpV4,
Operation = ArpOperation.Request,
SenderHardwareAddress = _client.Configuration.MacAddress.AsBytes.AsReadOnly(),
SenderProtocolAddress = _client.Configuration.IpAddress.AsBytes.AsReadOnly(),
TargetHardwareAddress = Common.MacAddress.Broadcast.AsBytes.AsReadOnly(),
TargetProtocolAddress = _client.Configuration.IpAddress.AsBytes.AsReadOnly(),
};
OSI.Layer2Packet packet = new OSI.Layer2Packet();
packet.DestinationMac = Common.MacAddress.Broadcast;
packet.SourceMac = _client.Configuration.MacAddress;
packet.NextLayers.Add(arpLayer);
SendPacket(packet);
}
private void SendArpReplyPacket(Common.IPv4Address ip)
{
PcapDotNet.Packets.Arp.ArpLayer arpLayer =
new PcapDotNet.Packets.Arp.ArpLayer
{
ProtocolType = PcapDotNet.Packets.Ethernet.EthernetType.IpV4,
Operation = ArpOperation.Reply,
SenderHardwareAddress = _client.Configuration.MacAddress.AsBytes.AsReadOnly(),
SenderProtocolAddress = _client.Configuration.IpAddress.AsBytes.AsReadOnly(),
TargetHardwareAddress = ArpCache[ip.AsString].Mac.AsBytes.AsReadOnly(),
TargetProtocolAddress = ip.AsBytes.AsReadOnly(),
};
OSI.Layer2Packet packet = new OSI.Layer2Packet();
packet.DestinationMac = ArpCache[ip.AsString].Mac;
packet.SourceMac = _client.Configuration.MacAddress;
packet.NextLayers.Add(arpLayer);
SendPacket(packet);
}