internal static AbstractPacket GetPacketForType(ushort etherType, Frame parentFrame, int newPacketStartIndex, int newPacketEndIndex) { AbstractPacket packet; try { //if(this.ParentFrame.Data[PacketStartIndex+12]==0x08 && this.ParentFrame.Data[PacketStartIndex+13]==0x00) { if (etherType == (ushort)Ethernet2Packet.EtherTypes.IPv4 && IPv4Packet.TryParse(parentFrame, newPacketStartIndex, newPacketEndIndex, out packet)) { //IPv4 packet //packet = new IPv4Packet(parentFrame, newPacketStartIndex, newPacketEndIndex); } else if (etherType == (ushort)Ethernet2Packet.EtherTypes.IPv6) { //IPv6 packet packet = new IPv6Packet(parentFrame, newPacketStartIndex, newPacketEndIndex); } //else if(this.ParentFrame.Data[PacketStartIndex+12]==0x08 && this.ParentFrame.Data[PacketStartIndex+13]==0x06) { else if (etherType == (ushort)Ethernet2Packet.EtherTypes.ARP) { packet = new ArpPacket(parentFrame, newPacketStartIndex, newPacketEndIndex); //ARP-packet } else if (etherType == (ushort)Ethernet2Packet.EtherTypes.IEEE802_1Q) { //VLAN packet = new IEEE_802_1Q_VlanPacket(parentFrame, newPacketStartIndex, newPacketEndIndex); } else if (etherType == (ushort)Ethernet2Packet.EtherTypes.MPLS) { packet = new Mpls(parentFrame, newPacketStartIndex, newPacketEndIndex); } else if (etherType == (ushort)Ethernet2Packet.EtherTypes.PPPoE) { packet = new PointToPointOverEthernetPacket(parentFrame, newPacketStartIndex, newPacketEndIndex); } else if (etherType == (ushort)Ethernet2Packet.EtherTypes.xHayesTunnel) { packet = new Ethernet2Packet(parentFrame, newPacketStartIndex + 4, newPacketEndIndex); } //etherType might actually be a content length if it is an IEEE 802.3 packet else if (etherType < 0x0600) { //the etherType showed to actually be a length value packet = new LogicalLinkControlPacket(parentFrame, newPacketStartIndex, newPacketEndIndex); } else { //something else packet = new RawPacket(parentFrame, newPacketStartIndex, newPacketEndIndex); } } catch (Exception) { packet = new RawPacket(parentFrame, newPacketStartIndex, newPacketEndIndex); } return(packet); }
public override IEnumerable <AbstractPacket> GetSubPackets(bool includeSelfReference) { if (includeSelfReference) { yield return(this); } AbstractPacket packet; if (this.bottomOfStack) { /** * EoMPLS = Ethernet over MPLS * http://www.faqs.org/rfcs/rfc4448.html * 0 1 2 3 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * |0 0 0 0| Reserved | Sequence Number | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * * In the above diagram, the first 4 bits MUST be set to 0 to indicate * PW data. The rest of the first 16 bits are reserved for future use. * They MUST be set to 0 when transmitting, and MUST be ignored upon * receipt. **/ if (ParentFrame.Data[PacketStartIndex + PAYLOAD_OFFSET] < 0x10) { packet = new Ethernet2Packet(this.ParentFrame, PacketStartIndex + PAYLOAD_OFFSET + 4, PacketEndIndex); } else if (IPv4Packet.TryParse(this.ParentFrame, PacketStartIndex + PAYLOAD_OFFSET, PacketEndIndex, out packet)) { //packet = new IPv4Packet(this.ParentFrame, PacketStartIndex + PAYLOAD_OFFSET, PacketEndIndex); } else { yield break; } } else { packet = new Mpls(this.ParentFrame, PacketStartIndex + PAYLOAD_OFFSET, PacketEndIndex); } yield return(packet); foreach (AbstractPacket subPacket in packet.GetSubPackets(false)) { yield return(subPacket); } }