public static TreeViewItem EthernetTreeViewItem(EthernetDatagram ethernetDatagram)
{
var treeViewItem = new TreeViewItem
{
DataContext = ethernetDatagram,
HeaderTemplate = (Helpers.GetResourceItem()["EtherItem"] as DataTemplate)
};
treeViewItem.Items.Add(new TreeViewItem { Header = string.Format("Source : {0}", ethernetDatagram.Source) });
treeViewItem.Items.Add(new TreeViewItem { Header = string.Format("Destination : {0}", ethernetDatagram.Destination) });
treeViewItem.Items.Add(new TreeViewItem { Header = string.Format("Header Length : {0} byte(s)", ethernetDatagram.HeaderLength) });
treeViewItem.Items.Add(new TreeViewItem { Header = string.Format("Payload Length : {0} byte(s)", ethernetDatagram.PayloadLength) });
var payload = new TreeViewItem
{
Header = string.Format("Payload : {0}", "0x" + ethernetDatagram.Payload.ToHexadecimalString())
};
payload.MouseDoubleClick += delegate
{
Clipboard.SetText(ethernetDatagram.Payload.ToHexadecimalString());
};
treeViewItem.Items.Add(payload);
return treeViewItem;
}
public override void Write(byte[] buffer, int offset, int payloadLength, ILayer previousLayer, ILayer nextLayer)
{
EthernetType ethernetType = EthernetBaseLayer.GetEthernetType(this.EtherType, nextLayer);
MacAddress destination = this.Destination;
IEthernetNextLayer ethernetNextLayer = nextLayer as IEthernetNextLayer;
if (destination == MacAddress.Zero && ethernetNextLayer != null && ethernetNextLayer.PreviousLayerDefaultDestination.HasValue)
{
destination = ethernetNextLayer.PreviousLayerDefaultDestination.Value;
}
EthernetDatagram.WriteHeader(buffer, offset, this.Source, destination, ethernetType);
}
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);
}