/// <summary>
/// IPv4 handler.
/// </summary>
/// <param name="packetData">Packet data.</param>
/// <exception cref="sys.ArgumentOutOfRangeException">Thrown on fatal error (contact support).</exception>
/// <exception cref="sys.IO.IOException">Thrown on IO error.</exception>
/// <exception cref="sys.ArgumentException">Thrown on fatal error (contact support).</exception>
/// <exception cref="sys.OverflowException">Thrown if packetData array length is greater than Int32.MaxValue.</exception>
internal static void IPv4Handler(byte[] packetData)
{
var ip_packet = new IPPacket(packetData);
if (ip_packet.SourceIP == null)
{
Global.mDebugger.Send("SourceIP null in IPv4Handler!");
}
ARPCache.Update(ip_packet.SourceIP, ip_packet.SourceMAC);
if ((NetworkStack.AddressMap.ContainsKey(ip_packet.DestinationIP.Hash) == true) ||
(ip_packet.DestinationIP.address[3] == 255))
{
switch (ip_packet.Protocol)
{
case 1:
ICMPPacket.ICMPHandler(packetData);
break;
case 6:
TCPPacket.TCPHandler(packetData);
break;
case 17:
UDPPacket.UDPHandler(packetData);
break;
}
}
else if (NetworkStack.MACMap.ContainsKey(ip_packet.DestinationMAC.Hash))
{
DHCPPacket.DHCPHandler(packetData);
}
}
internal static void IPv4Handler(byte[] packetData)
{
IPPacket ip_packet = new IPPacket(packetData);
//[Received] " + ip_packet.ToString()
if (ip_packet.SourceIP == null)
{
//SourceIP null in IPv4Handler!
}
ARPCache.Update(ip_packet.SourceIP, ip_packet.SourceMAC);
if ((NetworkStack.AddressMap.ContainsKey(ip_packet.DestinationIP.Hash) == true) ||
(ip_packet.DestinationIP.address[3] == 255))
{
switch (ip_packet.Protocol)
{
case 1:
ICMPPacket.ICMPHandler(packetData);
break;
case 6:
TCPPacket.TCPHandler(packetData);
break;
case 17:
UDPPacket.UDPHandler(packetData);
break;
}
}
else if (NetworkStack.MACMap.ContainsKey(ip_packet.DestinationMAC.Hash))
{
DHCP.DHCPPacket.DHCPHandler(packetData);
}
}
internal static void IPv4Handler(byte[] packetData)
{
IPPacket ip_packet = new IPPacket(packetData);
//Sys.Console.WriteLine("Received IP Packet");
//Sys.Console.WriteLine(ip_packet.ToString());
ARPCache.Update(ip_packet.SourceIP, ip_packet.SourceMAC);
if ((NetworkStack.AddressMap.ContainsKey(ip_packet.DestinationIP.Hash) == true) ||
(ip_packet.DestinationIP.address[3] == 255))
{
switch (ip_packet.Protocol)
{
case 1:
ICMPPacket.ICMPHandler(packetData);
break;
//case 6:
// IPv4_TCPHandler(packetData);
// break;
case 17:
UDPPacket.UDPHandler(packetData);
break;
}
}
}
internal static void Send()
{
bool wasenabled = false;
if (Uszka.Kernel.debugger.enabled)
{
Uszka.Kernel.debugger.enabled = false;
wasenabled = true;
}
ensureQueueExists();
int _deltaT = 0;
int second = 0;
while (!(queue.Count < 1))
{
if (_deltaT != Cosmos.HAL.RTC.Second)
{
second++;
_deltaT = Cosmos.HAL.RTC.Second;
}
if (second >= 4)
{
debugger.Send("No response in 4 secondes...");
break;
}
//foreach (BufferEntry entry in queue)
for (int e = 0; e < queue.Count; e++)
{
BufferEntry entry = queue[e];
if (entry.Status == BufferEntry.EntryStatus.ADDED)
{
//Need to figure how this is working
if (Config.IsLocalAddress(entry.Packet.DestinationIP) == false)
{
entry.nextHop = Config.FindRoute(entry.Packet.DestinationIP);
if (entry.nextHop == null)
{
entry.Status = BufferEntry.EntryStatus.DONE;
continue;
}
if (ARPCache.Contains(entry.nextHop) == true)
{
entry.Packet.DestinationMAC = ARPCache.Resolve(entry.nextHop);
entry.NIC.QueueBytes(entry.Packet.RawData);
entry.Status = BufferEntry.EntryStatus.DONE;
}
else
{
ARPRequest_Ethernet arp_request = new ARPRequest_Ethernet(entry.NIC.MACAddress, entry.Packet.SourceIP,
MACAddress.Broadcast, entry.nextHop, MACAddress.None);
entry.NIC.QueueBytes(arp_request.RawData);
entry.Status = BufferEntry.EntryStatus.ROUTE_ARP_SENT;
}
continue;
}
if (ARPCache.Contains(entry.Packet.DestinationIP) == true)
{
entry.Packet.DestinationMAC = ARPCache.Resolve(entry.Packet.DestinationIP);
entry.NIC.QueueBytes(entry.Packet.RawData);
entry.Status = BufferEntry.EntryStatus.DONE;
}
else
{
ARPRequest_Ethernet arp_request = new ARPRequest_Ethernet(entry.NIC.MACAddress, entry.Packet.SourceIP,
MACAddress.Broadcast, entry.Packet.DestinationIP, MACAddress.None);
entry.NIC.QueueBytes(arp_request.RawData);
entry.Status = BufferEntry.EntryStatus.ARP_SENT;
}
}
else if (entry.Status == BufferEntry.EntryStatus.DHCP_REQUEST)
{
entry.NIC.QueueBytes(entry.Packet.RawData);
entry.Status = BufferEntry.EntryStatus.DONE;
}
else if (entry.Status == BufferEntry.EntryStatus.JUST_SEND)
{
entry.NIC.QueueBytes(entry.Packet.RawData);
entry.Status = BufferEntry.EntryStatus.DONE;
}
}
int i = 0;
while (i < queue.Count)
{
if (queue[i].Status == BufferEntry.EntryStatus.DONE)
{
queue.RemoveAt(i);
}
else
{
i++;
}
}
}
if (wasenabled)
{
Uszka.Kernel.debugger.enabled = true;
}
}
internal static void Send()
{
ensureQueueExists();
if (queue.Count < 1)
{
return;
}
//foreach (BufferEntry entry in queue)
for (int e = 0; e < queue.Count; e++)
{
BufferEntry entry = queue[e];
if (entry.Status == BufferEntry.EntryStatus.ADDED)
{
if (Config.IsLocalAddress(entry.Packet.DestinationIP) == false)
{
entry.nextHop = Config.FindRoute(entry.Packet.DestinationIP);
if (entry.nextHop == null)
{
entry.Status = BufferEntry.EntryStatus.DONE;
continue;
}
if (ARPCache.Contains(entry.nextHop) == true)
{
entry.Packet.DestinationMAC = ARPCache.Resolve(entry.nextHop);
entry.NIC.QueueBytes(entry.Packet.RawData);
entry.Status = BufferEntry.EntryStatus.DONE;
}
else
{
ARPRequest_Ethernet arp_request = new ARPRequest_Ethernet(entry.NIC.MACAddress, entry.Packet.SourceIP,
MACAddress.Broadcast, entry.nextHop, MACAddress.None);
entry.NIC.QueueBytes(arp_request.RawData);
entry.Status = BufferEntry.EntryStatus.ROUTE_ARP_SENT;
}
continue;
}
if (ARPCache.Contains(entry.Packet.DestinationIP) == true)
{
entry.Packet.DestinationMAC = ARPCache.Resolve(entry.Packet.DestinationIP);
entry.NIC.QueueBytes(entry.Packet.RawData);
entry.Status = BufferEntry.EntryStatus.DONE;
}
else
{
ARPRequest_Ethernet arp_request = new ARPRequest_Ethernet(entry.NIC.MACAddress, entry.Packet.SourceIP,
MACAddress.Broadcast, entry.Packet.DestinationIP, MACAddress.None);
entry.NIC.QueueBytes(arp_request.RawData);
entry.Status = BufferEntry.EntryStatus.ARP_SENT;
}
}
else if (entry.Status == BufferEntry.EntryStatus.JUST_SEND)
{
entry.NIC.QueueBytes(entry.Packet.RawData);
entry.Status = BufferEntry.EntryStatus.DONE;
}
}
int i = 0;
while (i < queue.Count)
{
if (queue[i].Status == BufferEntry.EntryStatus.DONE)
{
queue.RemoveAt(i);
}
else
{
i++;
}
}
mDebugger.SendInternal($"Number of packages in queue: {i}");
}
