Made for WANT 2019.
This is server-only. GUI can be found here.
- ARP (proxy ARP)
- C, S Routing
- Dynamic Routing using RIP
- LLDP
- Snniffing packets
- DHCP server
Router in C# for demonstrational purposes.
Made for WANT 2019.
This is server-only. GUI can be found here.
Max 25 sieti, ak viac, poslat viacero updates.
Chceck this validity.
Posle sa triggered update aj po exspirovani invalid timeru? Po exspirovani holddownu (urcite nie).
On an RIP Packet arrival, Packet.cs went out of index.
protected byte[] Slice(int o, int len)
{
var Value = new Byte[len];
for (var i = 0; i < len && i < Length; i++)
{
Value[i] = RawData[o + i];
}
return Value;
}
at Router.Helpers.Packet.Slice(Int32 o, Int32 len) in C:\Users\m1k1o\source\repos\Router\Router\Helpers\Packet.cs:line 119
at Router.Protocols.RIPPacket.get_RouteCollection() in C:\Users\m1k1o\source\repos\Router\Router\Protocols\RIPPacket.cs:line 32
at Router.RIP.RIPService.OnPacketArrival(Handler Handler) in C:\Users\m1k1o\source\repos\Router\Router\RIP\RIPService.cs:line 98
at Router.PacketArrival.Invoke(Handler Handler)
at Router.Interface.<.ctor>b__28_0(RawCapture Packet) in C:\Users\m1k1o\source\repos\Router\Router\Interface.cs:line 30
at Router.Helpers.Device.<Start>b__26_0(Object sender, CaptureEventArgs e) in C:\Users\m1k1o\source\repos\Router\Router\Helpers\Device.cs:line 94
at SharpPcap.LibPcap.PcapDevice.SendPacketArrivalEvent(RawCapture p)
at SharpPcap.WinPcap.WinPcapDevice.SendPacketArrivalEvent(RawCapture p)
at SharpPcap.LibPcap.PcapDevice.PacketHandler(IntPtr param, IntPtr header, IntPtr data)
at SharpPcap.LibPcap.LibPcapSafeNativeMethods.pcap_dispatch(IntPtr adaptHandle, Int32 count, pcap_handler callback, IntPtr ptr)
at SharpPcap.LibPcap.PcapDevice.CaptureThread()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
do RT sa dostanu tie RIP zaznamy, ktore sa nezhoduju s C a S ?
Po vymazani statickej adresy sa vymaze z poolu, ak tam nahodou je.
This should be one structure. Generator should be able to:
Generator is already able to:
IP a Maska sa dá meniť počas behu. Tieto zmeny sa musia odraziť aj v Routing a RIP tabuľke.
Spraviť mutovať IP a Network je časť riešenia, pre RT je to v pohode, avšak pri RIP môžu nastať konflikty, ak by sa už nachádzala taká sieť v tabuľke od toho interface-u.
Data:
0000 08 00 4b bd 00 9b 03 bb 54 45 53 54 53 K½»TESTS
Tree:
Internet Control Message Protocol
Type: 8 (Echo (ping) request)
Code: 0
Checksum: 0x4bbd incorrect, should be 0xf90f
[Expert Info (Warning/Checksum): Bad checksum [should be 0xf90f]]
[Bad checksum [should be 0xf90f]]
[Severity level: Warning]
[Group: Checksum]
[Checksum Status: Bad]
Identifier (BE): 155 (0x009b)
Identifier (LE): 39680 (0x9b00)
Sequence number (BE): 955 (0x03bb)
Sequence number (LE): 47875 (0xbb03)
Data (5 bytes)
Data: 5445535453
[Length: 5]
Keď smerovač prijme cestu s metrikou 16, odstráni ju zo smerovacej tabuľky, ale zostáva v databáze ako possibly down, pošle triggered update o tejto sieti s metrikou 16.
Neposielat pakety na rozhranie z ktoreho prislo.
Append payload to any packets.
Extend existing GeneratorPacket class to payload. Existing payload cases can overrite default method. => Get rid of Generator Payload.
Auto add END at the end of collection if not present.
Po expirovani Flush Timeru treba ihned vymazat, nie pasivne.
Thrown Exceptions from converters are not being catched.
Ked sa prijme siet s metrikou 16 a uz sa nachadza v RIP Tabulke nejaka siet, prepne sa do stavu Holddown. Avsak ked ten stav vyprsi, tak potom zostane ta povodna siet v tabulke aktivna? Alebo sa stane rovno inactive?
int newSize = 4 + (value.Count * 20);
if(newSize != Data.Length)
{
Array.Resize(ref Data, 4 + (value.Count * 20));
}
var ms = new MemoryStream();
foreach (RTE item in value)
{
var itemBytes = item.Bytes;
ms.Write(itemBytes, 0, itemBytes.Length);
}
var Dst = ms.ToArray();
Array.Copy(Data, 4, Dst, 0, Dst.Length);
Sniffinng packets should be independent for each vonnection. But I could not unsubscribe event.
Samotný routing by mal byť synchrónny - v akom poradí sa prijmú paktety v takom poradí sa odošlú.
ARP musí byť asynchrónny - ak čaká paket na spracovanie, pošle ARP request, nikdy by ho nedočkal lebo sám blokuje príjmanie.
RIP môže / nemusí byť asynchrónny.
Moze byt rovnaka C siet aj S?
Co ak je C, moze vzniknut S?
Co ak je S, moze vzniknut C?
not removing from RT at all.
Fetch ARP on Proxy ARP request and andswer only 100% valid IPs.
Dva interfaces nemozu mat rovnaku siet. Treba overovat pri ulozeni.
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