/// <summary>
/// Returns the embedded Wake-On-LAN packet
/// or null if there is none
/// </summary>
/// <returns>
/// A Wake-On-LAN packet
/// </returns>
public static WakeOnLanPacket GetEncapsulated(Packet p)
{
if (p is EthernetPacket)
{
var payload = EthernetPacket.GetInnerPayload((InternetLinkLayerPacket)p);
if (((EthernetPacket)p).Type == EthernetPacketType.WakeOnLan)
{
var payloadBas = new ByteArraySegment(p.PayloadData);
if (WakeOnLanPacket.IsValid(payloadBas))
{
return(new WakeOnLanPacket(payloadBas));
}
}
if (payload != null && payload is IpPacket)
{
var innerPayload = payload.PayloadPacket;
if ((innerPayload != null) &&
(innerPayload.PayloadData != null) &&
(innerPayload is UdpPacket))
{
var innerPayloadBas = new ByteArraySegment(innerPayload.PayloadData);
if (WakeOnLanPacket.IsValid(innerPayloadBas))
{
return(new WakeOnLanPacket(innerPayloadBas));
}
}
}
}
return(null);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="byteArraySegment">
/// A <see cref="ByteArraySegment" />
/// </param>
public UdpPacket(ByteArraySegment byteArraySegment)
{
Log.DebugFormat("ByteArraySegment {0}", byteArraySegment);
// set the header field, header field values are retrieved from this byte array
Header = new ByteArraySegment(byteArraySegment)
{
Length = UdpFields.HeaderLength
};
PayloadPacketOrData = new Lazy <PacketOrByteArraySegment>(() =>
{
const int wakeOnLanPort0 = 0;
const int wakeOnLanPort7 = 7;
const int wakeOnLanPort9 = 9;
const int l2TpPort = 1701;
const int teredoPort = 3544;
var result = new PacketOrByteArraySegment();
var destinationPort = DestinationPort;
var sourcePort = SourcePort;
var payload = Header.NextSegment();
// If this packet is going to port 0, 7 or 9, then it might be a WakeOnLan packet.
if ((destinationPort == wakeOnLanPort0) || (destinationPort == wakeOnLanPort7) || (destinationPort == wakeOnLanPort9))
{
if (WakeOnLanPacket.IsValid(payload))
{
result.Packet = new WakeOnLanPacket(payload);
return(result);
}
}
if ((destinationPort == l2TpPort) || (sourcePort == l2TpPort))
{
result.Packet = new L2tpPacket(payload, this);
return(result);
}
// Teredo encapsulates IPv6 traffic into UDP packets, parse out the bytes in the payload into packets.
// If it contains a IPV6 packet, it to this current packet as a payload.
// https://tools.ietf.org/html/rfc4380#section-5.1.1
if ((destinationPort == teredoPort) || (sourcePort == teredoPort))
{
if (ContainsIPv6Packet(payload))
{
result.Packet = new IPv6Packet(payload);
return(result);
}
}
// store the payload bytes
result.ByteArraySegment = payload;
return(result);
},
LazyThreadSafetyMode.PublicationOnly);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="bas">
/// A <see cref="ByteArraySegment"/>
/// </param>
public WakeOnLanPacket(ByteArraySegment bas)
{
if (WakeOnLanPacket.IsValid(bas))
{
// set the header field, header field values are retrieved from this byte array
header = new ByteArraySegment(bas);
header.Length = Bytes.Length;
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="bas">
/// A <see cref="ByteArraySegment"/>
/// </param>
public WakeOnLanPacket(ByteArraySegment bas)
{
log.Debug("");
RandomUtils.EnsurePacketLength(this, packetLength, bas.Length);
if (WakeOnLanPacket.IsValid(bas))
{
// set the header field, header field values are retrieved from this byte array
header = new ByteArraySegment(bas);
header.Length = Bytes.Length;
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="byteArraySegment">
/// A <see cref="ByteArraySegment" />
/// </param>
public UdpPacket(ByteArraySegment byteArraySegment)
{
Log.DebugFormat("ByteArraySegment {0}", byteArraySegment);
// set the header field, header field values are retrieved from this byte array
Header = new ByteArraySegment(byteArraySegment)
{
Length = UdpFields.HeaderLength
};
PayloadPacketOrData = new LazySlim <PacketOrByteArraySegment>(() =>
{
const int wakeOnLanPort0 = 0;
const int wakeOnLanPort7 = 7;
const int wakeOnLanPort9 = 9;
var result = new PacketOrByteArraySegment();
var destinationPort = DestinationPort;
var sourcePort = SourcePort;
var payload = Header.NextSegment();
// If this packet is going to port 0, 7 or 9, then it might be a WakeOnLan packet.
if (destinationPort == wakeOnLanPort0 || destinationPort == wakeOnLanPort7 || destinationPort == wakeOnLanPort9)
{
if (WakeOnLanPacket.IsValid(payload))
{
result.Packet = new WakeOnLanPacket(payload);
return(result);
}
}
if (destinationPort == L2tpFields.Port || sourcePort == L2tpFields.Port)
{
result.Packet = new L2tpPacket(payload, this);
return(result);
}
if ((sourcePort == DhcpV4Fields.ClientPort || sourcePort == DhcpV4Fields.ServerPort) &&
(destinationPort == DhcpV4Fields.ClientPort || destinationPort == DhcpV4Fields.ServerPort))
{
var nextSegmentLength = byteArraySegment.Length - Header.Length;
if (nextSegmentLength >= DhcpV4Fields.MinimumSize)
{
var nextSegment = new ByteArraySegment(byteArraySegment.Bytes, byteArraySegment.Offset + Header.Length, nextSegmentLength);
var magicNumber = EndianBitConverter.Big.ToUInt32(nextSegment.Bytes, nextSegment.Offset + DhcpV4Fields.MagicNumberPosition);
if (magicNumber == DhcpV4Fields.MagicNumber)
{
result.Packet = new DhcpV4Packet(nextSegment, this);
return(result);
}
}
}
// Teredo encapsulates IPv6 traffic into UDP packets, parse out the bytes in the payload into packets.
// If it contains a IPV6 packet, it to this current packet as a payload.
// https://tools.ietf.org/html/rfc4380#section-5.1.1
if (destinationPort == IPv6Fields.TeredoPort || sourcePort == IPv6Fields.TeredoPort)
{
if (ContainsIPv6Packet(payload))
{
result.Packet = new IPv6Packet(payload);
return(result);
}
}
// store the payload bytes
result.ByteArraySegment = payload;
return(result);
});
}
