/// <summary>
/// Look for the innermost payload. This method is useful because
/// while some packets are LinuxSSL->IpPacket or
/// EthernetPacket->IpPacket, there are some packets that are
/// EthernetPacket->PPPoEPacket->PPPPacket->IpPacket, and for these cases
/// we really want to get to the IpPacket
/// </summary>
/// <returns>
/// A <see cref="Packet"/>
/// </returns>
public static Packet GetInnerPayload(InternetLinkLayerPacket packet)
{
// is this an ethernet packet?
if (packet is EthernetPacket)
{
log.Debug("packet is EthernetPacket");
var thePayload = packet.PayloadPacket;
// is this packets payload a PPPoEPacket? If so,
// the PPPoEPacket payload should be a PPPPacket and we want
// the payload of the PPPPpacket
if (thePayload is PPPoEPacket)
{
log.Debug("thePayload is PPPoEPacket");
return(thePayload.PayloadPacket.PayloadPacket);
}
return(thePayload);
}
else
{
log.Debug("else");
return(packet.PayloadPacket);
}
}
public static LLDPPacket GetType(Packet p)
{
if (p is InternetLinkLayerPacket)
{
Packet innerPayload = InternetLinkLayerPacket.GetInnerPayload((InternetLinkLayerPacket)p);
if (innerPayload is LLDPPacket)
{
return((LLDPPacket)innerPayload);
}
}
return(null);
}
public static ARPPacket GetEncapsulated(Packet p)
{
if (p is InternetLinkLayerPacket)
{
Packet innerPayload = InternetLinkLayerPacket.GetInnerPayload((InternetLinkLayerPacket)p);
if (innerPayload is ARPPacket)
{
return((ARPPacket)innerPayload);
}
}
return(null);
}
/// <summary>
/// Returns the IpPacket inside of the Packet p or null if
/// there is no encapsulated packet
/// </summary>
/// <param name="p">
/// A <see cref="Packet"/>
/// </param>
/// <returns>
/// A <see cref="IpPacket"/>
/// </returns>
public static IpPacket GetEncapsulated(Packet p)
{
if (p is InternetLinkLayerPacket)
{
var payload = InternetLinkLayerPacket.GetInnerPayload((InternetLinkLayerPacket)p);
if (payload is IpPacket)
{
return((IpPacket)payload);
}
}
return(null);
}
public static Packet GetInnerPayload(InternetLinkLayerPacket packet)
{
if (!(packet is EthernetPacket))
{
return packet.PayloadPacket;
}
Packet payloadPacket = packet.PayloadPacket;
if (payloadPacket is PPPoEPacket)
{
return payloadPacket.PayloadPacket.PayloadPacket;
}
return payloadPacket;
}
public static Packet GetInnerPayload(InternetLinkLayerPacket packet)
{
if (!(packet is EthernetPacket))
{
return(packet.PayloadPacket);
}
Packet payloadPacket = packet.PayloadPacket;
if (payloadPacket is PPPoEPacket)
{
return(payloadPacket.PayloadPacket.PayloadPacket);
}
return(payloadPacket);
}
public static LLDPPacket GetEncapsulated(Packet p)
{
log.Debug("");
if (p is InternetLinkLayerPacket)
{
var payload = InternetLinkLayerPacket.GetInnerPayload((InternetLinkLayerPacket)p);
if (payload is LLDPPacket)
{
return((LLDPPacket)payload);
}
}
return(null);
}
public static ICMPv4Packet GetEncapsulated(Packet p)
{
if (p is InternetLinkLayerPacket)
{
Packet innerPayload = InternetLinkLayerPacket.GetInnerPayload((InternetLinkLayerPacket)p);
if (innerPayload is IpPacket)
{
Packet payloadPacket = innerPayload.PayloadPacket;
if (payloadPacket is ICMPv4Packet)
{
return((ICMPv4Packet)payloadPacket);
}
}
}
return(null);
}
/// <summary>
/// Returns the encapsulated IGMPv2Packet of the Packet p or null if
/// there is no encapsulated packet
/// </summary>
/// <param name="p">
/// A <see cref="Packet"/>
/// </param>
/// <returns>
/// A <see cref="IGMPv2Packet"/>
/// </returns>
public static IGMPv2Packet GetEncapsulated(Packet p)
{
if (p is InternetLinkLayerPacket)
{
var payload = InternetLinkLayerPacket.GetInnerPayload((InternetLinkLayerPacket)p);
if (payload is IpPacket)
{
Console.WriteLine("Is an IP packet");
var innerPayload = payload.PayloadPacket;
if (innerPayload is IGMPv2Packet)
{
return((IGMPv2Packet)innerPayload);
}
}
}
return(null);
}
public static ICMPv4Packet GetEncapsulated(Packet p)
{
log.Debug("");
if (p is InternetLinkLayerPacket)
{
var payload = InternetLinkLayerPacket.GetInnerPayload((InternetLinkLayerPacket)p);
if (payload is IpPacket)
{
var payload2 = payload.PayloadPacket;
if (payload2 is ICMPv4Packet)
{
return((ICMPv4Packet)payload2);
}
}
}
return(null);
}
