public void ProcessTCP(IpV4Datagram packet)
{
IpV4Datagram ip = packet;
TcpDatagram tcp = packet.Tcp;
uint TcpSessionHashCode = UtilityLib.GetTcpSessionHashCode(ip.CurrentDestination, tcp.DestinationPort, ip.Source, tcp.SourcePort);
ITcpSession session = (ITcpSession)_tcp_sessions[TcpSessionHashCode];
if (session != null)
{
session.ProcessTCP(packet);
}
}
public static uint GetTcpSessionHashCode(IpV4Address LocalIP, ushort LocalPort, IpV4Address RemoteIP, ushort RemotePort)
{
byte[] LocalAdress = UtilityLib.ByteArrayJoin(LocalIP.ToBytes(), BitConverter.GetBytes(LocalPort));
byte[] RemoteAdress = UtilityLib.ByteArrayJoin(RemoteIP.ToBytes(), BitConverter.GetBytes(RemotePort));
return(Hash(UtilityLib.ByteArrayJoin(LocalAdress, RemoteAdress)));
}
public static uint GetVirtualAdapterHashCode(MacAddress MAC, IpV4Address IP, ushort VLAN)
{
return(Hash(UtilityLib.ByteArrayJoin(UtilityLib.ByteArrayJoin(MAC.ToBytes(), IP.ToBytes()), BitConverter.GetBytes(VLAN))));
}
public static uint GetVirtualAdapterHashCode(string MAC, string IP, ushort VLAN)
{
return(Hash(UtilityLib.ByteArrayJoin(UtilityLib.ByteArrayJoin(new MacAddress(MAC).ToBytes(), new IpV4Address(IP).ToBytes()), BitConverter.GetBytes(VLAN))));
}
private void PacketProcess(Packet packet)
{
// Debug.WriteLine(packet.Ethernet.EtherType.ToString() + " : " + packet.Timestamp.ToString("yyyy-MM-dd hh:mm:ss.fff") + " length:" + packet.Length);
ushort VLAN = 1;
if (packet.Ethernet.EtherType == EthernetType.VLanTaggedFrame)
{
VLAN = packet.Ethernet.VLanTaggedFrame.VLanIdentifier;
}
if (packet.Ethernet.Destination.Equals(UtilityLib.BroadcastMac))
{
foreach (VirtualAdapter Adapter in _adapter_hashtable.Values)
{
if (Adapter.VLAN.Equals(VLAN)) // 若为广播包，则交给相应VLAN下所有虚拟适配器处理
{
Adapter.PacketProcess(packet);
}
}
}
else
{
if (VLAN != 1)
{
if (packet.Ethernet.VLanTaggedFrame.EtherType == EthernetType.Arp)
{
VirtualAdapter[] Adapters = GetAdapterByMac(packet.Ethernet.Destination);
foreach (VirtualAdapter Adapter in Adapters)
{
if (Adapter.VLAN.Equals(VLAN))
{
Adapter.PacketProcess(packet);
}
}
}
else if (packet.Ethernet.VLanTaggedFrame.EtherType == EthernetType.IpV4) // 处理IPv4包
{
uint AdapterHashCode = UtilityLib.GetVirtualAdapterHashCode(packet.Ethernet.Destination, packet.Ethernet.VLanTaggedFrame.IpV4.CurrentDestination, VLAN);
VirtualAdapter Adapter = (VirtualAdapter)_adapter_hashtable[AdapterHashCode];
if (Adapter != null)
{
Adapter.PacketProcess(packet);
}
}
}
else
{
if (packet.Ethernet.EtherType == EthernetType.Arp)
{
VirtualAdapter[] Adapters = GetAdapterByMac(packet.Ethernet.Destination);
foreach (VirtualAdapter Adapter in Adapters)
{
if (Adapter.VLAN.Equals(VLAN))
{
Adapter.PacketProcess(packet);
}
}
}
else if (packet.Ethernet.EtherType == EthernetType.IpV4) // 处理IPv4包
{
uint AdapterHashCode = UtilityLib.GetVirtualAdapterHashCode(packet.Ethernet.Destination, packet.Ethernet.IpV4.CurrentDestination, VLAN);
VirtualAdapter Adapter = (VirtualAdapter)_adapter_hashtable[AdapterHashCode];
if (Adapter != null)
{
Adapter.PacketProcess(packet);
}
}
}
}
}