public void dispatch_packet(ref RawCapture rawPacket)
{
byte[] src_mac = new byte[6];
byte[] dst_mac = new byte[6];
byte[] packet_data = rawPacket.Data;
// copy source and destination MAC addresses from sniffed packet
Buffer.BlockCopy(rawPacket.Data, 0, dst_mac, 0, 6);
PhysicalAddress dstMAC = new PhysicalAddress(dst_mac);
Buffer.BlockCopy(rawPacket.Data, 6, src_mac, 0, 6);
PhysicalAddress srcMAC = new PhysicalAddress(src_mac);
#if DEBUG
xbs_messages.addDebugMessage("s> " + srcMAC + "=>" + dstMAC + "Len:" + rawPacket.Data.Length, xbs_message_sender.SNIFFER);
Packet p = Packet.ParsePacket(rawPacket.LinkLayerType, rawPacket.Data);
xbs_messages.addDebugMessage("s> " + p, xbs_message_sender.SNIFFER);
#endif
// if sniffed packet has MAC of packet we injected, discard
bool is_injected_packet = false;
lock (injected_macs_hash)
is_injected_packet = injected_macs_hash.Contains(srcMAC.GetHashCode());
if (is_injected_packet)
{
return;
}
if (NAT.NAT_enabled)
{
#if DEBUG
System.Diagnostics.Stopwatch stopWatch = new System.Diagnostics.Stopwatch();
stopWatch.Start();
#endif
EthernetPacketType p_type = NAT.deNAT_outgoing_packet_PacketDotNet(ref packet_data, dstMAC, srcMAC);
#if DEBUG
stopWatch.Stop();
if (p_type == EthernetPacketType.IpV4)
{
xbs_sniffer_statistics.deNAT_callCount++;
if (xbs_sniffer_statistics.deNAT_callCount > 1)
{
xbs_sniffer_statistics.deNAT_timeInCode += (UInt64)stopWatch.ElapsedTicks;
UInt32 average = (UInt32)(xbs_sniffer_statistics.deNAT_timeInCode / (xbs_sniffer_statistics.deNAT_callCount - 1));
double average_ms = new TimeSpan(average).TotalMilliseconds;
xbs_messages.addDebugMessage("- deNAT time: " + stopWatch.ElapsedTicks + " deNAT count: " + (xbs_sniffer_statistics.deNAT_callCount - 1) + " Total Time: " + xbs_sniffer_statistics.deNAT_timeInCode + "=> " + average + " / " + average_ms + "ms", xbs_message_sender.SNIFFER);
}
}
p = Packet.ParsePacket(rawPacket.LinkLayerType, packet_data);
xbs_messages.addDebugMessage("s> " + p, xbs_message_sender.SNIFFER);
#endif
}
// count the sniffed packets from local xboxs
xbs_sniffer_statistics.packet_count++;
// find node with destination MAC Address in network and send packet
xbs_node node = node_list.distributeDataPacket(dstMAC, packet_data);
int srcMac_hash = srcMAC.GetHashCode();
bool pdevfilter_needs_change = false;
lock (sniffed_macs_hash)
{
if (!sniffed_macs_hash.Contains(srcMac_hash))
{
sniffed_macs_hash.Add(srcMac_hash);
lock (sniffed_macs)
sniffed_macs.Add(srcMAC);
pdevfilter_needs_change = true;
}
}
if (pdevfilter_needs_change)
{
setPdevFilter();
}
}
