// Network Layer
public bool SendPacket(MAC adapter, IPv4Header data)
{
if (NetworkInterfaces.ContainsKey(adapter))
{
NetworkInterfaces[adapter].SendPacket(data.ToBytes());
return(true);
}
else
{
return(false);
}
}
public void ToBytesAndBack1()
{
Optionlist ol = new Optionlist();
ol.Add(new DHCPOption(Tag.dhcpServerID, IP.Broadcast.ToBytes()));
ol.Add(new DHCPOption(Tag.router, IP.Broadcast.ToBytes()));
ol.Add(new DHCPOption(Tag.subnetmask, IP.Zero.ToBytes()));
ol.Add(new DHCPOption(Tag.domainserver, IP.Broadcast.ToBytes()));
DHCPDatagram DHCP1 = new DHCPDatagram(1, 78974564, 1, 10, 0, 0, true, IP.Broadcast, null, null, null, MAC.Random(), ol);
UDPHeader UDP1 = new UDPHeader(100, 101, DHCP1.ToBytes());
IPv4Header ipv41 = new IPv4Header(1, false, false, 30, IPv4Header.ProtocolType.UDP, IP.Zero, IP.Broadcast, new byte[0], UDP1.ToBytes());
byte[] Bytes = ipv41.ToBytes();
IPv4Header ipv42 = new IPv4Header(Bytes);
UDPHeader UDP2 = new UDPHeader(ipv42.Datagram);
DHCPDatagram DHCP2 = new DHCPDatagram(UDP2.Datagram);
Assert.Equal(ipv41.ToBytes(), ipv42.ToBytes());
Assert.Equal(UDP1.ToBytes(), UDP2.ToBytes());
Assert.Equal(DHCP1.ToBytes(), DHCP2.ToBytes());
}
public void ToBytes()
{
byte[] expected, actual, tmp;
expected = new byte[20]
{
0x45, 0x00, 0x00, 0x28, 0x6e, 0x9c, 0x40, 0x00, 0x80, 0x06, 0x77, 0xd7, 0x0a, 0x90, 0xe3, 0x64, 0x28, 0x43, 0xfe, 0x24
};
IPv4Header ipv4 = new IPv4Header(0x6E9C, true, false, 128, IPv4Header.ProtocolType.TCP, IP.Parse("10.144.227.100"), IP.Parse("40.67.254.36"), new byte[0], new byte[20]);
tmp = ipv4.ToBytes();
actual = new byte[20];
Array.Copy(tmp, actual, 20);
Assert.Equal(expected, actual);
}
protected virtual void handleICMPPacket(IPv4Header datagram, NetworkInterface a)
{
switch (datagram.Datagram[0])
{
case 0: // Echo Replys
{
ICMPEchoRequestReply header = new ICMPEchoRequestReply(datagram.Datagram);
OnICMPPacket?.Invoke(datagram, header, header.Code, a);
}
break;
case 8: // Echo Request
if (respondToEcho)
{
ICMPEchoRequestReply header = new ICMPEchoRequestReply(datagram.Datagram);
ICMPEchoRequestReply icmp = new ICMPEchoRequestReply(0, header.Identifier, (UInt16)(header.SequenceNumber + 1));
IPv4Header ipv4 = new IPv4Header(datagram.Identification, false, false, 255, IPv4Header.ProtocolType.ICMP, a.LocalIP, datagram.SourceAddress, null, icmp.ToBytes());
a.SendPacket(ipv4.ToBytes());
}
break;
}
}
public void OnTick(uint tick)
{
switch (state)
{
case State.INIT:
if (failures <= 10)
{
offeredIP = null;
DHCPServerIP = null;
Offer = null;
RequestResponce = null;
// Create DHCP Options
Optionlist ol = new Optionlist();
ol.Add(new DHCPOption(Tag.dhcpMsgType, new byte[1] {
(byte)DHCPOption.MsgType.DHCPDISCOVER
}));
// Requesting Spesific IP
if (a.LocalIP != null)
{
ol.Add(new DHCPOption(Tag.addressRequest, a.LocalIP.ToBytes()));
}
// Asking for Spesific Params back
ol.Add(new DHCPOption(Tag.paramaterList, paramlist.ToArray()));
// create DHCP Datagram
DHCPDatagram DhcpDatagram = new DHCPDatagram(0, xid, ClientMAC: a.MyMACAddress, Broadcast: true, options: ol);
// UDP and IPv4 Headers
UDPHeader UDP = new UDPHeader(68, 67, DhcpDatagram.ToBytes());
IPv4Header IPv4 = IPv4Header.DefaultUDPWrapper(IP.Zero, IP.Broadcast, UDP.ToBytes(), 32);
state = State.SELECTING;
Client.Log("Sending Discover Packet");
// Send IPv4 Packet
a.SendPacket(IPv4.ToBytes());
T3 = 100;
}
break;
case State.SELECTING:
if (Offer != null)
{
if (Offer.yiaddr != null)
{
offeredIP = Offer.yiaddr;
DHCPServerIP = null;
foreach (DHCPOption o in Offer.options)
{
if (o.tag == Tag.dhcpServerID)
{
DHCPServerIP = new IP(o.data);
}
}
Optionlist ol = new Optionlist()
{
new DHCPOption(Tag.dhcpMsgType, new byte[1] {
(byte)DHCPOption.MsgType.DHCPREQUEST
}),
new DHCPOption(Tag.addressRequest, offeredIP.ToBytes())
};
if (DHCPServerIP != null)
{
ol.Add(new DHCPOption(Tag.dhcpServerID, DHCPServerIP.ToBytes()));
}
ol.Add(new DHCPOption(Tag.paramaterList, paramlist.ToArray()));
DHCPDatagram DhcpDatagram = new DHCPDatagram(0, xid, ClientMAC: a.MyMACAddress, options: ol);
UDPHeader UDP = new UDPHeader(68, 67, DhcpDatagram.ToBytes());
IP server = IP.Broadcast;
if (Offer.siaddr != null)
{
server = Offer.siaddr;
}
IPv4Header IPv4 = IPv4Header.DefaultUDPWrapper(IP.Zero, server, UDP.ToBytes(), 32);
a.SendPacket(IPv4.ToBytes());
Client.Log("Sending Request Packet");
state = State.REQUESTING;
}
}
else
if (T3-- <= 0)
{
failures++;
state = State.INIT;
}
break;
case State.REQUESTING:
if (RequestResponce != null)
{
foreach (DHCPOption o in RequestResponce.options)
{
if (o.tag == Tag.dhcpMsgType)
{
if (o.data[0] == (byte)DHCPOption.MsgType.DHCPNAK)
{
Offer = null;
RequestResponce = null;
state = State.INIT;
break;
}
else
if (o.data[0] == (byte)DHCPOption.MsgType.DHCPACK)
{
foreach (DHCPOption op in RequestResponce.options)
{
switch (op.tag)
{
case Tag.addressTime:
T1 = BitConverter.ToUInt32(op.data, 0);
T2 = T1 - 10;
break;
case Tag.subnetmask:
a.SubnetMask = new IP(op.data, 0);
break;
case Tag.router:
a.DefaultGateway = new IP(op.data, 0);
break;
case Tag.domainserver:
a.DNS = new IP(op.data, 0);
break;
}
}
a.LocalIP = RequestResponce.yiaddr;
state = State.BOUND;
break;
}
}
}
}
break;
case State.BOUND:
if (T2-- <= 0)
{
T1--;
Optionlist ol = new Optionlist()
{
new DHCPOption(Tag.dhcpMsgType, new byte[1] {
(byte)DHCPOption.MsgType.DHCPREQUEST
}),
new DHCPOption(Tag.addressRequest, a.LocalIP.ToBytes())
};
if (DHCPServerIP != null)
{
ol.Add(new DHCPOption(Tag.dhcpServerID, DHCPServerIP.ToBytes()));
}
ol.Add(new DHCPOption(Tag.paramaterList, paramlist.ToArray()));
DHCPDatagram DhcpDatagram = new DHCPDatagram(0, xid, ClientMAC: a.MyMACAddress, options: ol);
UDPHeader UDP = new UDPHeader(68, 67, DhcpDatagram.ToBytes());
IP server = IP.Broadcast;
if (Offer.siaddr != null)
{
server = Offer.siaddr;
}
IPv4Header IPv4 = IPv4Header.DefaultUDPWrapper(a.LocalIP, server, UDP.ToBytes(), 32);
RequestResponce = null;
a.SendPacket(IPv4.ToBytes());
state = State.RENEWING;
}
break;
case State.RENEWING:
if (RequestResponce != null)
{
foreach (DHCPOption o in RequestResponce.options)
{
if (o.tag == Tag.dhcpMsgType)
{
if (o.data[0] == (byte)DHCPOption.MsgType.DHCPNAK)
{
Offer = null;
state = State.INIT;
break;
}
else
if (o.data[0] == (byte)DHCPOption.MsgType.DHCPACK)
{
foreach (DHCPOption op in RequestResponce.options)
{
switch (op.tag)
{
case Tag.addressTime:
T1 = BitConverter.ToUInt32(op.data, 0);
T2 = T1 - 200;
break;
case Tag.subnetmask:
a.SubnetMask = new IP(op.data, 0);
break;
case Tag.router:
a.DefaultGateway = new IP(op.data, 0);
break;
case Tag.domainserver:
a.DNS = new IP(op.data, 0);
break;
}
}
a.LocalIP = RequestResponce.yiaddr;
state = State.BOUND;
break;
}
}
}
}
else
if (T1-- <= 0)
{
Optionlist ol = new Optionlist()
{
new DHCPOption(Tag.dhcpMsgType, new byte[1] {
(byte)DHCPOption.MsgType.DHCPREQUEST
}),
new DHCPOption(Tag.addressRequest, a.LocalIP.ToBytes())
};
if (DHCPServerIP != null)
{
ol.Add(new DHCPOption(Tag.dhcpServerID, DHCPServerIP.ToBytes()));
}
ol.Add(new DHCPOption(Tag.paramaterList, paramlist.ToArray()));
DHCPDatagram DhcpDatagram = new DHCPDatagram(0, xid, ClientMAC: a.MyMACAddress, options: ol);
UDPHeader UDP = new UDPHeader(68, 67, DhcpDatagram.ToBytes());
IP server = IP.Broadcast;
if (Offer.siaddr != null)
{
server = Offer.siaddr;
}
IPv4Header IPv4 = IPv4Header.DefaultUDPWrapper(a.LocalIP, server, UDP.ToBytes(), 32);
state = State.REBINDING;
T3 = 200;
a.SendPacket(IPv4.ToBytes());
}
break;
case State.REBINDING:
if (RequestResponce != null)
{
foreach (DHCPOption o in RequestResponce.options)
{
if (o.tag == Tag.dhcpMsgType)
{
if (o.data[0] == (byte)DHCPOption.MsgType.DHCPNAK)
{
Offer = null;
state = State.INIT;
break;
}
else
if (o.data[0] == (byte)DHCPOption.MsgType.DHCPACK)
{
foreach (DHCPOption op in RequestResponce.options)
{
switch (op.tag)
{
case Tag.addressTime:
T1 = BitConverter.ToUInt32(op.data, 0);
T2 = T1 - 200;
break;
case Tag.subnetmask:
a.SubnetMask = new IP(op.data, 0);
break;
case Tag.router:
a.DefaultGateway = new IP(op.data, 0);
break;
case Tag.domainserver:
a.DNS = new IP(op.data, 0);
break;
}
}
a.LocalIP = RequestResponce.yiaddr;
state = State.BOUND;
break;
}
}
}
}
else
if (T3-- <= 0)
{
state = State.INIT;
}
break;
case State.INITREBOOT:
state = State.INIT;
break;
case State.REBOOTING:
state = State.INIT;
break;
}
}
public void packet(IPv4Header ipv4, UDPHeader udp, UInt16 dest, NetworkInterface a)
{
if (dest == 67)
{
try
{
DHCPDatagram dHCP = new DHCPDatagram(udp.Datagram);
DHCPDatagram newdHCP = new DHCPDatagram(2, dHCP.xid, ClientMAC: dHCP.chaddr);
Optionlist ol = new Optionlist();
foreach (DHCPOption o in dHCP.options)
{
switch (o.tag)
{
case Tag.paramaterList:
foreach (byte b in o.data)
{
switch ((Tag)b)
{
case Tag.dhcpServerID:
ol.Add(new DHCPOption(Tag.dhcpServerID, a.LocalIP.ToBytes()));
break;
case Tag.router:
ol.Add(new DHCPOption(Tag.router, GatewayIP.ToBytes()));
break;
case Tag.subnetmask:
ol.Add(new DHCPOption(Tag.subnetmask, SubnetMask.ToBytes()));
break;
case Tag.domainserver:
ol.Add(new DHCPOption(Tag.domainserver, DNS.ToBytes()));
break;
}
}
break;
case Tag.dhcpMsgType:
switch ((DHCPOption.MsgType)o.data[0])
{
case DHCPOption.MsgType.DHCPDISCOVER:
Log("DHCPDescover recieved from " + dHCP.chaddr.ToString());
if (newdHCP == null)
{
break;
}
newdHCP.yiaddr = NewAddress(dHCP.chaddr);
Reserved.Add(newdHCP.yiaddr, new Lease(newdHCP.yiaddr, dHCP.chaddr, currentTick, 100));
ol.Add(new DHCPOption(Tag.dhcpMsgType, new byte[] { (byte)DHCPOption.MsgType.DHCPOFFER }));
Log("Offered IP " + newdHCP.yiaddr + " to " + newdHCP.chaddr);
break;
case DHCPOption.MsgType.DHCPREQUEST:
IP Request = new IP(dHCP.options.Find(match => match.tag == Tag.addressRequest).data, 0);
Log("DHCPRequest recieved from " + dHCP.chaddr.ToString());
if (isAvailable(Request, dHCP.chaddr))
{
lock (Leaseslock)
{
if (Reserved.ContainsKey(Request))
{
Reserved.Remove(Request);
}
if (Leases.ContainsKey(Request))
{
Leases.Remove(Request);
}
Lease l = new Lease(Request, dHCP.chaddr, currentTick, (uint)r.Next(40, 60));
Leases.Add(l.ciaddr, l);
ol.Add(new DHCPOption(Tag.dhcpMsgType, new byte[] { (byte)DHCPOption.MsgType.DHCPACK }));
newdHCP.yiaddr = Request;
Log("Leased IP " + l.ciaddr + " to " + l.chaddr + " for " + l.LeaseLength + " ticks");
}
}
else
{
ol.Add(new DHCPOption(Tag.dhcpMsgType, new byte[] { (byte)DHCPOption.MsgType.DHCPNAK }));
Log("denied lease of " + Request + " to " + dHCP.chaddr);
}
break;
}
break;
}
}
newdHCP.options = ol;
UDPHeader newupd = new UDPHeader(67, 68, newdHCP.ToBytes());
IPv4Header newipv4 = IPv4Header.DefaultUDPWrapper(a.LocalIP, IP.Broadcast, newupd.ToBytes(), 32);
a.SendPacket(newipv4.ToBytes());
Log("Packet Sent");
}
catch (Exception e)
{
Log(e.ToString());
}
}
}
static void Main(string[] args)
{
{
Console.WriteLine("NSHG.IP");
IP ip0 = new IP(new Byte[] { 0, 0, 0, 0 });
Output(ip0.Equals(ip0), "ip.Equals (Identical)");
Console.WriteLine("NSHG.IP");
IP ip1234 = new IP(new Byte[] { 1, 2, 3, 4, 5 }, 0);
IP ip12342 = new IP(new Byte[] { 1, 2, 3, 4 });
Output(ip12342.Equals(ip1234), "ip.from array size > 4");
IP ip255 = new IP(new Byte[] { 255, 255, 255, 255 });
IP ip2552 = new IP(new Byte[] { 255, 255, 255, 255 });
Output(ip255.Equals(ip2552), "ip.Equals (Non Identical)");
IP ip3 = new IP(new Byte[] { 0, 0, 0, 0 });
Output(ip0.Equals(ip3), "ip.Equals (Non Identical)");
IP ip4 = new IP(new Byte[] { 0, 0, 0, 1 });
Output(!ip0.Equals(ip4), "ip.Equals (Non Identical, Not Equal)");
// Parse
// Normal Parse's
IP ip5 = IP.Parse("192.168.1.1");
IP ip192 = new IP(new Byte[] { 192, 168, 1, 1 });
Output(ip5.Equals(ip192), "ip.Parse(\"192.168.1.1\")");
ip5 = IP.Parse("0.0.0.0");
Output(ip5.Equals(ip0), "ip.Parse(\"0.0.0.0\")");
ip5 = IP.Parse("255.255.255.255");
Output(ip5.Equals(ip255), "ip.Parse(\"255.255.255.255\")");
// Address Segments > 255
bool result = false;
try
{
IP ip = IP.Parse("256.256.256.256");
}
catch (OverflowException)
{
result = true;
}
finally
{
Output(result, "IP.Parse (Overflow)");
}
// Null Input
result = false;
try
{
IP ip = IP.Parse("");
}
catch (ArgumentNullException)
{
result = true;
}
finally
{
Output(result, "IP.Parse (Null)");
}
// Not Enough Segments
result = false;
try
{
IP ip = IP.Parse("1");
}
catch (ArgumentOutOfRangeException)
{
result = true;
}
finally
{
Output(result, "IP.Parse (1)");
}
result = false;
try
{
IP ip = IP.Parse("1.1");
}
catch (ArgumentOutOfRangeException)
{
result = true;
}
finally
{
Output(result, "IP.Parse (1.1)");
}
result = false;
try
{
IP ip = IP.Parse("1.1.1");
}
catch (ArgumentOutOfRangeException)
{
result = true;
}
finally
{
Output(result, "IP.Parse (1.1.1)");
}
}// IP
{
MAC m = new MAC(new Byte[] { 255, 255, 255, 255, 255, 255 });
m = MAC.Parse("FF:FF:FF:FF:FF:00");
Console.WriteLine(m.ToString());
foreach (Byte b in m.ToBytes())
{
Console.WriteLine(b);
}
}// MAC
{
Console.WriteLine();
Console.WriteLine();
Console.WriteLine();
byte[] expected, actual;
expected = new byte[]
{
0x45, 0x00, 0x00, 0x28, 0x6e, 0x9c, 0x40, 0x00, 0x80, 0x06, 0x77, 0xd7, 0x0a, 0x90, 0xe3, 0x64, 0x28, 0x43, 0xfe, 0x24
};
IPv4Header ipv4 = new IPv4Header(0x6E9C, true, false, 128, (IPv4Header.ProtocolType) 6, IP.Parse("10.144.227.100"), IP.Parse("40.67.254.36"), new byte[0], new byte[20]);
actual = ipv4.ToBytes();
foreach (byte b in expected)
{
Console.Write(b.ToString("X"));
Console.Write(" ");
}
Console.WriteLine();
foreach (byte b in actual)
{
Console.Write(b.ToString("X"));
Console.Write(" ");
}
Console.WriteLine();
}// IP Header
{
}// TCP Header
Console.ReadLine();
}