private static void ARPHandler(byte[] packetData)
{
ARP.ARPPacket arp_packet = new ARP.ARPPacket(packetData);
if (arp_packet.Operation == 0x01)
{
if ((arp_packet.HardwareType == 1) && (arp_packet.ProtocolType == 0x0800))
{
ARP.ARPRequest_EthernetIPv4 arp_request = new ARP.ARPRequest_EthernetIPv4(packetData);
ARP.ARPCache.Update(arp_request.SenderIP, arp_request.SenderMAC);
if (addressMap.ContainsKey(arp_request.TargetIP.To32BitNumber()) == true)
{
//Console.WriteLine("ARP Request Recvd from " + arp_request.SenderIP.ToString());
HW.Network.NetworkDevice nic = addressMap[arp_request.TargetIP.To32BitNumber()];
ARP.ARPReply_EthernetIPv4 reply =
new ARP.ARPReply_EthernetIPv4(nic.MACAddress, arp_request.TargetIP, arp_request.SenderMAC, arp_request.SenderIP);
nic.QueueBytes(reply.RawData);
}
}
}
else if (arp_packet.Operation == 0x02)
{
if ((arp_packet.HardwareType == 1) && (arp_packet.ProtocolType == 0x0800))
{
ARP.ARPReply_EthernetIPv4 arp_reply = new ARP.ARPReply_EthernetIPv4(packetData);
ARP.ARPCache.Update(arp_reply.SenderIP, arp_reply.SenderMAC);
//Console.WriteLine("ARP Reply Recvd for IP=" + arp_reply.SenderIP.ToString());
TCPIP.IPv4OutgoingBuffer.ARPCache_Update(arp_reply);
}
}
}
internal static void ARPCache_Update(ARP.ARPReply_EthernetIPv4 arp_reply)
{
ensureQueueExists();
//foreach (BufferEntry entry in queue)
for (int e = 0; e < queue.Count; e++)
{
BufferEntry entry = queue[e];
if (entry.Status == BufferEntry.EntryStatus.ARP_SENT)
{
if (entry.Packet.DestinationIP.CompareTo(arp_reply.SenderIP) == 0)
{
entry.Packet.DestinationMAC = arp_reply.SenderMAC;
entry.Status = BufferEntry.EntryStatus.JUST_SEND;
}
}
else if (entry.Status == BufferEntry.EntryStatus.ROUTE_ARP_SENT)
{
if (entry.nextHop.CompareTo(arp_reply.SenderIP) == 0)
{
entry.Packet.DestinationMAC = arp_reply.SenderMAC;
entry.Status = BufferEntry.EntryStatus.JUST_SEND;
}
}
}
}
private static void ARPHandler(byte[] packetData)
{
ARP.ARPPacket arp_packet = new ARP.ARPPacket(packetData);
if (arp_packet.Operation == 0x01)
{
if ((arp_packet.HardwareType == 1) && (arp_packet.ProtocolType == 0x0800))
{
ARP.ARPRequest_EthernetIPv4 arp_request = new ARP.ARPRequest_EthernetIPv4(packetData);
ARP.ARPCache.Update(arp_request.SenderIP, arp_request.SenderMAC);
if (addressMap.ContainsKey(arp_request.TargetIP.To32BitNumber()) == true)
{
//Console.WriteLine("ARP Request Recvd from " + arp_request.SenderIP.ToString());
HW.Network.NetworkDevice nic = addressMap[arp_request.TargetIP.To32BitNumber()];
ARP.ARPReply_EthernetIPv4 reply =
new ARP.ARPReply_EthernetIPv4(nic.MACAddress, arp_request.TargetIP, arp_request.SenderMAC, arp_request.SenderIP);
nic.QueueBytes(reply.RawData);
}
}
}
else if (arp_packet.Operation == 0x02)
{
if ((arp_packet.HardwareType == 1) && (arp_packet.ProtocolType == 0x0800))
{
ARP.ARPReply_EthernetIPv4 arp_reply = new ARP.ARPReply_EthernetIPv4(packetData);
ARP.ARPCache.Update(arp_reply.SenderIP, arp_reply.SenderMAC);
//Console.WriteLine("ARP Reply Recvd for IP=" + arp_reply.SenderIP.ToString());
TCPIP.IPv4OutgoingBuffer.ARPCache_Update(arp_reply);
}
}
}
