public void TestInform_RootScopeAcceptInforms()
{
Random random = new Random();
IPv4Address start = random.GetIPv4Address();
IPv4Address end = random.GetIPv4AddressGreaterThan(start);
IPv4Address sourceAddress = random.GetIPv4AddressBetween(start, end);
DHCPv4Packet input = GetInformPacket(random, sourceAddress);
DHCPv4RootScope rootScope = GetRootScope();
Guid scopeId = Guid.NewGuid();
rootScope.Load(new List <DomainEvent> {
new DHCPv4ScopeAddedEvent(new DHCPv4ScopeCreateInstruction
{
AddressProperties = new DHCPv4ScopeAddressProperties(start, end, new List <IPv4Address>(), informsAreAllowd: true),
Id = scopeId,
})
});
DHCPv4Packet result = rootScope.HandleInform(input);
DHCPv4InformHandledEvent domainEvent = TestResult <DHCPv4InformHandledEvent>(
input, result, false, true, scopeId, rootScope);
Assert.Equal(InformErros.NoError, domainEvent.Error);
}
public DHCPv4RequestHandledEvent(Guid scopeId, DHCPv4Packet request, RequestErros error) : this(scopeId, request, DHCPv4Packet.Empty, error)
{
if (error == RequestErros.NoError)
{
throw new ArgumentException("if a request has no error, a response packet is needed");
}
}
private void receiveCallback(Packet packet)
{
try
{
IpV4Datagram ipPacket = packet.Ethernet.IpV4;
UdpDatagram udpDatagram = ipPacket.Udp;
Datagram datagram = udpDatagram.Payload;
if (udpDatagram.SourcePort.Equals(68) & udpDatagram.DestinationPort.Equals(67))
{
DHCPv4Packet dhcpv4Packet = new DHCPv4Packet();
if (dhcpv4Packet.parsePacket(datagram.ToArray()))
{
List <DHCPv4Option> list = new DHCPv4Option().parseDhcpOptions(dhcpv4Packet.dhcpOptions);
foreach (DHCPv4Option dhcpMessageTypeOption in list)
{
if (dhcpMessageTypeOption.optionIdBytes.Equals(0x35))
{
switch (dhcpMessageTypeOption.optionValue[0])
{
//--Packet is a Discover
case 0x01:
Console.WriteLine("Service received:\t" + packet.Ethernet.Destination + "\tDISCOVER\txid: " + BitConverter.ToString(dhcpv4Packet.xid));
sendDhcpOffer(new MacAddress(inter.getMacAddress()), packet.Ethernet.Source, dhcpv4Packet.xid, dhcpv4Packet.secs);
break;
//--Packet is an Request
case 0x03:
foreach (DHCPv4Option dhcpServerIdentifierOption in list)
{
//--DHCP contains Server-Identifier-Option.
if (dhcpServerIdentifierOption.optionIdBytes.Equals(0x36))
{
//--DHCP-Server-Identifier equals IP-Address of DHCP-Server.
if (BitConverter.ToInt32(dhcpServerIdentifierOption.optionValue, 0).Equals(BitConverter.ToInt32(inter.getIPAddress().GetAddressBytes(), 0)))
{
Console.WriteLine("Service received:\t" + packet.Ethernet.Destination + "\tREQUEST\t\txid: " + BitConverter.ToString(dhcpv4Packet.xid) + "\tSID: " + BitConverter.ToString(dhcpServerIdentifierOption.optionValue, 0));
sendDhcpAck(new MacAddress(inter.getMacAddress()), packet.Ethernet.Source, dhcpv4Packet.xid, dhcpv4Packet.secs);
}
else
{
Console.WriteLine("Client preferes other DHCP-Server!");
}
}
}
break;
}
}
}
}
else
{
Console.WriteLine("The DHCP-Message could not be parsed...");
}
}
}
catch (Exception) { }
}
public void HandleInform_InformsAreAllowed()
{
Random random = new Random();
IPv4Address clientAddress = IPv4Address.FromString("192.168.178.10");
IPv4HeaderInformation headerInformation =
new IPv4HeaderInformation(clientAddress, IPv4Address.FromString("192.168.178.1"));
Byte[] clientMacAdress = random.NextBytes(6);
DHCPv4Packet requestPacket = new DHCPv4Packet(
headerInformation, clientMacAdress, (UInt32)random.Next(),
IPv4Address.Empty, IPv4Address.Empty, clientAddress,
DHCPv4PacketFlags.Unicast,
new DHCPv4PacketMessageTypeOption(DHCPv4MessagesTypes.Inform)
);
Mock <IScopeResolverManager <DHCPv4Packet, IPv4Address> > scopeResolverMock =
new Mock <IScopeResolverManager <DHCPv4Packet, IPv4Address> >(MockBehavior.Strict);
var resolverInformations = new CreateScopeResolverInformation
{
Typename = nameof(DHCPv4RelayAgentSubnetResolver),
};
Mock <IScopeResolver <DHCPv4Packet, IPv4Address> > resolverMock = new Mock <IScopeResolver <DHCPv4Packet, IPv4Address> >(MockBehavior.Strict);
scopeResolverMock.Setup(x => x.InitializeResolver(resolverInformations)).Returns(resolverMock.Object);
Guid scopeId = random.NextGuid();
DHCPv4RootScope rootScope = GetRootScope(scopeResolverMock);
rootScope.Load(new List <DomainEvent> {
new DHCPv4ScopeEvents.DHCPv4ScopeAddedEvent(
new DHCPv4ScopeCreateInstruction
{
AddressProperties = new DHCPv4ScopeAddressProperties(
IPv4Address.FromString("192.168.178.1"),
IPv4Address.FromString("192.168.178.255"),
new List <IPv4Address> {
IPv4Address.FromString("192.168.178.1")
},
informsAreAllowd: true
),
ResolverInformation = resolverInformations,
Name = "Testscope",
Id = scopeId,
})
});
DHCPv4Packet result = rootScope.HandleInform(requestPacket);
CheckAcknowledgePacket(clientAddress, result);
CheckEventAmount(1, rootScope);
CheckHandeledEvent(0, InformErros.NoError, requestPacket, result, rootScope);
}
public DHCPv4RequestHandledEvent(DHCPv4Packet request, DHCPv4Packet response, RequestErros error) : base(request, response, error == RequestErros.NoError)
{
if (error != RequestErros.ScopeNotFound)
{
throw new ArgumentException("a scope id has to be specified if an error different from 'ScopeNotFound' is used");
}
Error = error;
}
public DHCPv4DeclineHandledEvent(DHCPv4Packet request, DeclineErros error) : base(request, DHCPv4Packet.Empty, false)
{
if (error != DeclineErros.ScopeNotFound)
{
throw new ArgumentException("a scope id has to be specified if an error different from 'ScopeNotFound' is used");
}
Error = error;
}
public void DHCPv4RelayAgentSubnetResolver_PacketMeetsConditions()
{
Random random = new Random();
Int32 maskIdentifier = random.Next(20, 24);
IPv4SubnetMask mask = new IPv4SubnetMask(new IPv4SubnetMaskIdentifier(maskIdentifier));
IPv4Address addresses = random.GetIPv4NetworkAddress(mask);
Mock <ISerializer> serializer = new Mock <ISerializer>(MockBehavior.Strict);
serializer.Setup(x => x.Deserialze <String>(mask.GetSlashNotation().ToString())).Returns(mask.GetSlashNotation().ToString());
serializer.Setup(x => x.Deserialze <String>(addresses.ToString())).Returns(addresses.ToString());
DHCPv4RelayAgentSubnetResolver resolver = new DHCPv4RelayAgentSubnetResolver();
Dictionary <String, String> values = new Dictionary <String, String>()
{
{ nameof(DHCPv4RelayAgentSubnetResolver.NetworkAddress), addresses.ToString() },
{ nameof(DHCPv4RelayAgentSubnetResolver.Mask), mask.GetSlashNotation().ToString() },
};
resolver.ApplyValues(values, serializer.Object);
Int32 trys = random.Next(20, 30);
for (int i = 0; i < trys; i++)
{
Boolean shouldPass = false;
IPv4Address gwAddress = IPv4Address.Empty;
if (random.NextDouble() > 0.5)
{
gwAddress = random.GetIPv4AddressWithinSubnet(mask, addresses);
shouldPass = true;
}
else
{
if (random.NextDouble() > 0.5)
{
gwAddress = random.GetIPv4AddressOutWithSubnet(mask, addresses);
}
}
DHCPv4Packet packet = new DHCPv4Packet(
new IPv4HeaderInformation(random.GetIPv4Address(), random.GetIPv4Address()),
random.NextBytes(6),
(UInt32)random.Next(),
IPv4Address.Empty,
gwAddress,
IPv4Address.Empty
);
Boolean actual = resolver.PacketMeetsCondition(packet);
Assert.Equal(shouldPass, actual);
}
}
public DHCPv4Packet GetPacket()
{
if (_packet == null)
{
_packet = DHCPv4Packet.FromByteArray(Content,
new IPv4HeaderInformation(IPv4Address.FromString(Header.Source), IPv4Address.FromString(Header.Destination)));
}
return(_packet);
}
public void Blub()
{
String input = "0101060115430d42062c0000000000000000000000000000c2229c0202a0574ff12f00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000638253633501013d070102a0574ff12f390205003204c23763440c13524f555445524c414e434f4d313739335641573c0e4c414e434f4d20313739335641573707017903060f2bd4520d0103312f320206082697683201ff0000000000000000";
Byte[] content = StringToByteArray(input);
DHCPv4Packet packet = DHCPv4Packet.FromByteArray(content, new IPv4HeaderInformation(IPv4Address.FromString("192.168.10.0"), IPv4Address.FromString("192.168.10.10")));
Assert.True(packet.IsValid);
}
public void TestInform_RandomScopeAcceptInforms()
{
Random random = new Random();
IPv4Address start = random.GetIPv4Address();
IPv4Address end = random.GetIPv4AddressGreaterThan(start);
IPv4Address sourceAddress = random.GetIPv4AddressBetween(start, end);
List <Tuple <IPv4Address, IPv4Address> > existingRanges = new List <Tuple <IPv4Address, IPv4Address> >
{
new Tuple <IPv4Address, IPv4Address>(start, end),
};
DHCPv4Packet input = GetInformPacket(random, sourceAddress);
Int32 rootScopeAmount = random.Next(3, 10);
List <DomainEvent> events = new List <DomainEvent>();
for (int i = 0; i < rootScopeAmount; i++)
{
Guid rootScopeId = Guid.NewGuid();
Tuple <IPv4Address, IPv4Address> addressRange = random.GenerateUniqueAddressRange(existingRanges);
events.Add(new DHCPv4ScopeAddedEvent(new DHCPv4ScopeCreateInstruction
{
Id = rootScopeId,
AddressProperties = new DHCPv4ScopeAddressProperties
(addressRange.Item1, addressRange.Item2, Array.Empty <IPv4Address>(), informsAreAllowd: true)
}));
GenerateScopeTree(
random.NextDouble(), random,
rootScopeId, existingRanges, events);
}
Int32 randomScopeIndex = random.Next(0, events.Count);
DHCPv4ScopeAddedEvent corelatedScopeEvent = (DHCPv4ScopeAddedEvent)events[randomScopeIndex];
corelatedScopeEvent.Instructions.AddressProperties = new DHCPv4ScopeAddressProperties
(start, end, Array.Empty <IPv4Address>(), informsAreAllowd: true);
Guid scopeId = corelatedScopeEvent.Instructions.Id;
DHCPv4RootScope rootScope = GetRootScope();
rootScope.Load(events);
DHCPv4Packet result = rootScope.HandleInform(input);
DHCPv4InformHandledEvent domainEvent = TestResult <DHCPv4InformHandledEvent>(
input, result, false, true, scopeId, rootScope);
Assert.Equal(InformErros.NoError, domainEvent.Error);
}
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
DHCPv4Packet packet = (DHCPv4Packet)value;
Byte[] bytes = packet.GetAsStream();
serializer.Serialize(writer, new DHCPv4PacketSerializerInfo
{
Header = (IPv4HeaderInformation)packet.Header,
Stream = bytes,
});
}
public static bool IsOptionPresentend(DHCPv4Packet result, Byte optionType)
{
foreach (var item in result.Options)
{
if (item.OptionType == optionType)
{
return true;
}
}
return false;
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
var info = serializer.Deserialize <DHCPv4PacketSerializerInfo>(reader);
if (info == null)
{
return(DHCPv4Packet.Empty);
}
DHCPv4Packet packet = DHCPv4Packet.FromByteArray(info.Stream, info.Header);
return(packet);
}
public override Boolean PacketMeetsCondition(DHCPv4Packet packet)
{
foreach (var resolver in InnerResolvers)
{
Boolean resolverResult = resolver.PacketMeetsCondition(packet);
if (resolverResult == false)
{
return(false);
}
}
return(true);
}
private static void CheckAcknowledgePacket(IPv4Address clientAddress, DHCPv4Packet result)
{
Assert.NotNull(result);
Assert.NotEqual(DHCPv4Packet.Empty, result);
Assert.True(result.IsValid);
Assert.Equal(IPv4Address.Empty, result.YourIPAdress);
Assert.Equal(clientAddress, result.Header.Destionation);
Assert.Equal(clientAddress, result.ClientIPAdress);
Assert.Equal(DHCPv4MessagesTypes.Acknowledge, result.MessageType);
}
public void DHCPv4RelayAgentResolver_PacketMeetsConditions()
{
Random random = new Random();
List <IPv4Address> addresses = random.GetIPv4Addresses();
String serializedValues = System.Text.Json.JsonSerializer.Serialize(addresses.Select(x => x.ToString()));
Mock <ISerializer> serializer = new Mock <ISerializer>(MockBehavior.Strict);
serializer.Setup(x => x.Deserialze <IEnumerable <String> >(serializedValues)).Returns(addresses.Select(x => x.ToString()));
DHCPv4RelayAgentResolver resolver = new DHCPv4RelayAgentResolver();
Dictionary <String, String> values = new Dictionary <String, String>()
{
{ nameof(DHCPv4RelayAgentResolver.AgentAddresses), serializedValues }
};
resolver.ApplyValues(values, serializer.Object);
foreach (IPv4Address item in addresses)
{
Boolean shouldPass = false;
IPv4Address gwAddress = IPv4Address.Empty;
if (random.NextDouble() > 0.5)
{
gwAddress = item;
shouldPass = true;
}
else
{
if (random.NextDouble() > 0.5)
{
gwAddress = random.GetIPv4Address();
}
}
DHCPv4Packet packet = new DHCPv4Packet(
new IPv4HeaderInformation(random.GetIPv4Address(), random.GetIPv4Address()),
random.NextBytes(6),
(UInt32)random.Next(),
IPv4Address.Empty,
gwAddress,
IPv4Address.Empty
);
Boolean actual = resolver.PacketMeetsCondition(packet);
Assert.Equal(shouldPass, actual);
}
}
public static bool HasOptionThisIPv4Adress(DHCPv4Packet result, DHCPv4OptionTypes optionType, IPv4Address address)
{
foreach (var item in result.Options)
{
if (item.OptionType == (Byte)optionType)
{
Assert.IsAssignableFrom<DHCPv4PacketAddressOption>(item);
DHCPv4PacketAddressOption castedItem = (DHCPv4PacketAddressOption)item;
return castedItem.Address == address;
}
}
return false;
}
public void TestInform_ScopeNotFound()
{
Random random = new Random();
IPv4Address sourceAddress = random.GetIPv4Address();
DHCPv4Packet input = GetInformPacket(random, sourceAddress);
DHCPv4RootScope rootScope = GetRootScope();
DHCPv4Packet result = rootScope.HandleInform(input);
DHCPv4InformHandledEvent domainEvent = TestResult <DHCPv4InformHandledEvent>(
input, result, true, false, new Guid?(), rootScope);
Assert.Equal(InformErros.ScopeNotFound, domainEvent.Error);
}
public static T TestResult<T>(
DHCPv4Packet input,
DHCPv4Packet result,
Boolean emptyResponseExpected,
Boolean expectedSuccessfullHandling,
Guid? scopeId,
DHCPv4RootScope rootScope) where T : DHCPv4PacketHandledEvent
{
var changes = rootScope.GetChanges();
Assert.Single(changes);
DomainEvent domainEvent = changes.First();
Assert.IsAssignableFrom<T>(domainEvent);
T castedDomainEvents = (T)domainEvent;
if (scopeId.HasValue == false)
{
Assert.False(castedDomainEvents.ScopeId.HasValue);
}
else
{
Assert.True(castedDomainEvents.ScopeId.HasValue);
Assert.Equal(scopeId.Value, castedDomainEvents.ScopeId.Value);
}
Assert.Equal(input, castedDomainEvents.Request);
if (emptyResponseExpected == true)
{
Assert.Equal(DHCPv4Packet.Empty, result);
Assert.Equal(DHCPv4Packet.Empty, castedDomainEvents.Response);
}
else
{
Assert.NotEqual(DHCPv4Packet.Empty, result);
Assert.NotEqual(DHCPv4Packet.Empty, castedDomainEvents.Response);
Assert.Equal(result, castedDomainEvents.Response);
}
if (expectedSuccessfullHandling == false)
{
Assert.False(castedDomainEvents.WasSuccessfullHandled);
}
else
{
Assert.True(castedDomainEvents.WasSuccessfullHandled);
}
return castedDomainEvents;
}
private DHCPv4Packet GetDeclinePacket(Random random, IPv4Address address)
{
IPv4HeaderInformation headerInformation =
new IPv4HeaderInformation(IPv4Address.Empty, IPv4Address.Broadcast);
Byte[] clientMacAdress = random.NextBytes(6);
DHCPv4Packet declinePacket = new DHCPv4Packet(
headerInformation, clientMacAdress, (UInt32)random.Next(),
IPv4Address.Empty, IPv4Address.Empty, IPv4Address.Empty,
DHCPv4PacketFlags.Unicast,
new DHCPv4PacketMessageTypeOption(DHCPv4MessagesTypes.Decline),
new DHCPv4PacketAddressOption(DHCPv4OptionTypes.RequestedIPAddress, address)
);
return(declinePacket);
}
public async Task Handle(ValidDHCPv4PacketArrivedMessage notification, CancellationToken cancellationToken)
{
_logger.LogDebug("CURRENT STEP: Handling of packet");
_logger.LogDebug("packet: {packetType}", notification.Packet.MessageType);
DHCPv4Packet response = await _engine.HandlePacket(notification.Packet);
if (response == DHCPv4Packet.Empty)
{
_logger.LogInformation("unable to get a repsonse for packet {packetType}", notification.Packet.MessageType);
return;
}
_logger.LogDebug("STEP RESULT: Packet handled and response packet generated");
_logger.LogDebug("NEXT STEP: Interface Engine");
await _serviceBus.Publish(new DHCPv4PacketReadyToSendMessage(response));
}
public void DHCPv4RelayAgentSubnetResolver_PacketMeetsConditions2(
String networkAddressInput,
String maskInput,
String relayAgentAddressInput,
Boolean shouldPass
)
{
Random random = new Random();
IPv4SubnetMask mask = IPv4SubnetMask.FromString(maskInput);
IPv4Address networkAddress = IPv4Address.FromString(networkAddressInput);
String inputAddressValue = random.GetAlphanumericString(10);
String inputMaskValue = random.GetAlphanumericString(10);
Mock <ISerializer> serializer = new Mock <ISerializer>(MockBehavior.Strict);
serializer.Setup(x => x.Deserialze <String>(mask.GetSlashNotation().ToString())).Returns(mask.GetSlashNotation().ToString());
serializer.Setup(x => x.Deserialze <String>(networkAddress.ToString())).Returns(networkAddress.ToString());
DHCPv4RelayAgentSubnetResolver resolver = new DHCPv4RelayAgentSubnetResolver();
Dictionary <String, String> values = new Dictionary <String, String>()
{
{ nameof(DHCPv4RelayAgentSubnetResolver.NetworkAddress), networkAddress.ToString() },
{ nameof(DHCPv4RelayAgentSubnetResolver.Mask), mask.GetSlashNotation().ToString() },
};
resolver.ApplyValues(values, serializer.Object);
IPv4Address gwAddress = IPv4Address.FromString(relayAgentAddressInput);
DHCPv4Packet packet = new DHCPv4Packet(
new IPv4HeaderInformation(random.GetIPv4Address(), random.GetIPv4Address()),
random.NextBytes(6),
(UInt32)random.Next(),
IPv4Address.Empty,
gwAddress,
IPv4Address.Empty
);
Boolean actual = resolver.PacketMeetsCondition(packet);
Assert.Equal(shouldPass, actual);
}
public override Boolean PacketMeetsCondition(DHCPv4Packet packet)
{
Boolean positiveResultFound = false;
foreach (var resolver in InnerResolvers)
{
Boolean resolverResult = resolver.PacketMeetsCondition(packet);
if (resolverResult == true)
{
if (positiveResultFound == true)
{
return(false);
}
else
{
positiveResultFound = true;
}
}
}
return(positiveResultFound);
}
private void CheckHandeledEvent(
Int32 index, ReleaseError error,
DHCPv4Packet requestPacket,
DHCPv4RootScope rootScope)
{
IEnumerable <DomainEvent> changes = rootScope.GetChanges();
Assert.IsAssignableFrom <DHCPv4ReleaseHandledEvent>(changes.ElementAt(index));
DHCPv4ReleaseHandledEvent handeledEvent = (DHCPv4ReleaseHandledEvent)changes.ElementAt(index);
Assert.Equal(requestPacket, handeledEvent.Request);
Assert.Equal(DHCPv4Packet.Empty, handeledEvent.Response);
Assert.Equal(error, handeledEvent.Error);
if (error == ReleaseError.NoError)
{
Assert.True(handeledEvent.WasSuccessfullHandled);
}
else
{
Assert.False(handeledEvent.WasSuccessfullHandled);
}
}
protected void CheckPacketOptions(Guid scopeId, DHCPv4RootScope rootScope, DHCPv4Packet result)
{
var scope = rootScope.GetScopeById(scopeId);
if (scope.Properties != null)
{
foreach (var item in scope.Properties.Properties)
{
}
}
var subnetOption = result.GetOptionByIdentifier((Byte)DHCPv4OptionTypes.SubnetMask) as DHCPv4PacketAddressOption;
if (result.YourIPAdress == IPv4Address.Empty)
{
Assert.Null(subnetOption);
}
else
{
Assert.NotNull(subnetOption);
Assert.True(ByteHelper.AreEqual(subnetOption.Address.GetBytes(), scope.AddressRelatedProperties.Mask.GetBytes()));
}
}
public Packet buildDhcpOffer(MacAddress pSourceMacAddress, MacAddress pDestinationMacAddress, byte[] pTransactionId, byte[] pSecs)
{
IPAddress newClientIPAddress = IPAddress.Parse("0.0.0.0");
bool clientFound = false;
if (clientList.Count != 0)
{
foreach (Client item in clientList)
{
if (StructuralComparisons.StructuralEqualityComparer.Equals(item.macAddress, pDestinationMacAddress))
{
newClientIPAddress = item.ipaddress;
clientFound = true;
Debug.WriteLine("Listed Client has been found with IP-Binding: " + newClientIPAddress.ToString());
}
}
}
if (!clientFound)
{
newClientIPAddress = addressPool.getFreeIPAddress();
Client client = new Client(newClientIPAddress.ToString(), newClientIPAddress, pTransactionId, pDestinationMacAddress);
clientList.Add(client);
Debug.WriteLine("Listed Client has been generated with IP-Binding: " + newClientIPAddress.ToString() + " and xid: " + BitConverter.ToString(pTransactionId) + " and MacAddress: " + pDestinationMacAddress.ToString());
}
IPAddress ipaddress = inter.getIPAddress();
DHCPv4Option dhcpMessageTypeOption = new DHCPv4Option
{
optionId = DHCPv4OptionIds.DhcpMessageType,
optionLength = 0x01,
optionValue = new byte[] { 0x02 },
};
DHCPv4Option dhcpServerIdentifierOption = new DHCPv4Option
{
optionId = DHCPv4OptionIds.ServerIdentifier,
optionLength = 0x04,
optionValue = ipaddress.GetAddressBytes(),
};
DHCPv4Packet dhcpPacket = new DHCPv4Packet
{
op = 0x02,
htype = 0x01,
hlen = 0x06,
xid = pTransactionId,
secs = pSecs,
ciaddr = new byte[] { 0x00, 0x00, 0x00, 0x00 },
yiaddr = newClientIPAddress.GetAddressBytes(),
siaddr = ipaddress.GetAddressBytes(),
chaddr = PhysicalAddress.Parse(pDestinationMacAddress.ToString().Replace(":", "-")).GetAddressBytes(),
dhcpOptions = dhcpMessageTypeOption.buildDhcpOption().Concat(dhcpServerIdentifierOption.buildDhcpOption()).ToArray(),
};
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = pSourceMacAddress,
Destination = pDestinationMacAddress
};
IpV4Layer ipV4Layer = new IpV4Layer
{
Source = new IpV4Address(ipaddress.ToString()),
CurrentDestination = new IpV4Address(newClientIPAddress.ToString()),
Ttl = 128,
};
UdpLayer udpLayer = new UdpLayer
{
SourcePort = (ushort)67,
DestinationPort = (ushort)68,
};
PayloadLayer payloadLayer = new PayloadLayer
{
Data = new Datagram(dhcpPacket.buildPacket()),
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, udpLayer, payloadLayer);
return(builder.Build(DateTime.Now));
}
public Packet buildDhcpAck(MacAddress pSourceMacAddress, MacAddress pDestinationMacAddress, byte[] pTransactionId, byte[] pSecs)
{
IPAddress newClientIPAddress = IPAddress.Parse("0.0.0.0");
bool clientFound = false;
if (clientList.Count != 0)
{
foreach (Client item in clientList)
{
if (StructuralComparisons.StructuralEqualityComparer.Equals(item.macAddress, pDestinationMacAddress))
{
newClientIPAddress = item.ipaddress;
clientFound = true;
Debug.WriteLine("Listed Client has been found with IP-Binding: " + newClientIPAddress.ToString());
}
}
}
if (!clientFound)
{
Debug.WriteLine("Server sends a NAK. There is no TransactionId paired to a leased IP-Address! The Server did not received a DISCOVER from the Client");
}
IPAddress ipaddress = inter.getIPAddress();
IPAddress subnetmask = inter.getNetmask();
DHCPv4Option dhcpMessageTypeOption = new DHCPv4Option
{
optionId = DHCPv4OptionIds.DhcpMessageType,
optionLength = 0x01,
optionValue = new byte[] { 0x05 },
};
DHCPv4Option dhcpServerIdentifierOption = new DHCPv4Option
{
optionId = DHCPv4OptionIds.ServerIdentifier,
optionLength = 0x04,
optionValue = ipaddress.GetAddressBytes(),
};
DHCPv4Option ipAddressLeaseTimeOption = new DHCPv4Option
{
optionId = DHCPv4OptionIds.IpAddressLeaseTime,
optionLength = 0x04,
optionValue = new byte[] { 0x00, 0x0d, 0x2f, 0x00 },
};
DHCPv4Option renewalTimeValueOption = new DHCPv4Option
{
optionId = DHCPv4OptionIds.RenewalTimeValue,
optionLength = 0x04,
optionValue = new byte[] { 0x00, 0x06, 0x97, 0x80 },
};
DHCPv4Option rebindTimeValueOption = new DHCPv4Option
{
optionId = DHCPv4OptionIds.RebindingTimeValue,
optionLength = 0x04,
optionValue = new byte[] { 0x00, 0x0b, 0x89, 0x20 },
};
DHCPv4Option subnetMaskOption = new DHCPv4Option
{
optionId = DHCPv4OptionIds.Subnetmask,
optionLength = 0x04,
optionValue = subnetmask.GetAddressBytes(),
};
DHCPv4Option routerOption = new DHCPv4Option
{
optionId = DHCPv4OptionIds.Router,
optionLength = 0x04,
optionValue = addressPool.getGatewayIpAddress().GetAddressBytes(),
};
DHCPv4Option domainNameServerOption = new DHCPv4Option
{
optionId = DHCPv4OptionIds.DomainNameServer,
optionLength = 0x04,
optionValue = ipaddress.GetAddressBytes(),
};
DHCPv4Option domainNameOption = new DHCPv4Option
{
optionId = DHCPv4OptionIds.DomainName,
optionLength = (byte)addressPool.getDomainName().Length,
optionValue = Encoding.ASCII.GetBytes(addressPool.getDomainName()),
};
DHCPv4Packet dhcpPacket = new DHCPv4Packet
{
op = 0x02,
htype = 0x01,
hlen = 0x06,
xid = pTransactionId,
secs = pSecs,
ciaddr = new byte[] { 0x00, 0x00, 0x00, 0x00 },
yiaddr = newClientIPAddress.GetAddressBytes(),
siaddr = ipaddress.GetAddressBytes(),
chaddr = PhysicalAddress.Parse(pDestinationMacAddress.ToString().Replace(":", "-")).GetAddressBytes(),
dhcpOptions = dhcpMessageTypeOption.buildDhcpOption().Concat(dhcpServerIdentifierOption.buildDhcpOption()).Concat(ipAddressLeaseTimeOption.buildDhcpOption()).Concat(renewalTimeValueOption.buildDhcpOption()).Concat(rebindTimeValueOption.buildDhcpOption()).Concat(subnetMaskOption.buildDhcpOption()).Concat(routerOption.buildDhcpOption()).Concat(domainNameServerOption.buildDhcpOption()).Concat(domainNameOption.buildDhcpOption()).ToArray(),
};
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = pSourceMacAddress,
Destination = pDestinationMacAddress
};
IpV4Layer ipV4Layer = new IpV4Layer
{
Source = new IpV4Address(ipaddress.ToString()),
CurrentDestination = new IpV4Address(newClientIPAddress.ToString()),
Ttl = 128,
};
UdpLayer udpLayer = new UdpLayer
{
SourcePort = (ushort)67,
DestinationPort = (ushort)68,
};
PayloadLayer payloadLayer = new PayloadLayer
{
Data = new Datagram(dhcpPacket.buildPacket()),
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, udpLayer, payloadLayer);
return(builder.Build(DateTime.Now));
}
public void HandleRelease_LeaseExists_AddressIsActive()
{
Random random = new Random();
IPv4Address leasedAddress = IPv4Address.FromString("192.168.178.10");
IPv4HeaderInformation headerInformation =
new IPv4HeaderInformation(leasedAddress, IPv4Address.FromString("192.168.178.1"));
Byte[] clientMacAdress = random.NextBytes(6);
DHCPv4Packet requestPacket = new DHCPv4Packet(
headerInformation, clientMacAdress, (UInt32)random.Next(),
IPv4Address.Empty, IPv4Address.Empty, IPv4Address.Empty,
DHCPv4PacketFlags.Unicast,
new DHCPv4PacketMessageTypeOption(DHCPv4MessagesTypes.Release)
);
Mock <IScopeResolverManager <DHCPv4Packet, IPv4Address> > scopeResolverMock =
new Mock <IScopeResolverManager <DHCPv4Packet, IPv4Address> >(MockBehavior.Strict);
var resolverInformations = new CreateScopeResolverInformation
{
Typename = nameof(DHCPv4RelayAgentSubnetResolver),
};
Mock <IScopeResolver <DHCPv4Packet, IPv4Address> > resolverMock = new Mock <IScopeResolver <DHCPv4Packet, IPv4Address> >(MockBehavior.Strict);
scopeResolverMock.Setup(x => x.InitializeResolver(resolverInformations)).Returns(resolverMock.Object);
Guid scopeId = random.NextGuid();
Guid leaseId = random.NextGuid();
DateTime leaseCreatedAt = DateTime.UtcNow.AddHours(-1);
DHCPv4RootScope rootScope = GetRootScope(scopeResolverMock);
rootScope.Load(new List <DomainEvent> {
new DHCPv4ScopeEvents.DHCPv4ScopeAddedEvent(
new DHCPv4ScopeCreateInstruction
{
AddressProperties = new DHCPv4ScopeAddressProperties(
IPv4Address.FromString("192.168.178.1"),
IPv4Address.FromString("192.168.178.255"),
new List <IPv4Address> {
IPv4Address.FromString("192.168.178.1")
},
leaseTime: TimeSpan.FromDays(1)
),
ResolverInformation = resolverInformations,
Name = "Testscope",
Id = scopeId,
}),
new DHCPv4LeaseCreatedEvent
{
EntityId = leaseId,
Address = leasedAddress,
ClientIdenfier = DHCPv4ClientIdentifier.FromHwAddress(clientMacAdress).GetBytes(),
ScopeId = scopeId,
UniqueIdentifier = null,
StartedAt = leaseCreatedAt,
ValidUntil = DateTime.UtcNow.AddDays(1),
},
new DHCPv4LeaseActivatedEvent
{
EntityId = leaseId,
ScopeId = scopeId,
},
});
DHCPv4Lease lease = rootScope.GetScopeById(scopeId).Leases.GetLeaseById(leaseId);
DHCPv4Packet result = rootScope.HandleRelease(requestPacket);
Assert.Equal(DHCPv4Packet.Empty, result);
CheckIfLeaseIsRelease(lease);
CheckEventAmount(2, rootScope);
CheckLeaseReleasedEvent(0, scopeId, rootScope, leaseId);
CheckHandeledEvent(1, ReleaseError.NoError, requestPacket, rootScope);
}
public void HandleRelease_LeaseExists_AddressIsActive_NotSentDiscover()
{
Random random = new Random();
IPv4Address leasedAddress = IPv4Address.FromString("192.168.178.10");
IPv4HeaderInformation headerInformation =
new IPv4HeaderInformation(leasedAddress, IPv4Address.FromString("192.168.178.1"));
Byte[] clientMacAdress = random.NextBytes(6);
DHCPv4Packet requestPacket = new DHCPv4Packet(
headerInformation, clientMacAdress, (UInt32)random.Next(),
IPv4Address.Empty, IPv4Address.Empty, IPv4Address.Empty,
DHCPv4PacketFlags.Unicast,
new DHCPv4PacketMessageTypeOption(DHCPv4MessagesTypes.Release)
);
DHCPv4Packet discoverPacket = new DHCPv4Packet(
headerInformation, clientMacAdress, (UInt32)random.Next(),
IPv4Address.Empty, IPv4Address.Empty, IPv4Address.Empty,
DHCPv4PacketFlags.Broadcast,
new DHCPv4PacketMessageTypeOption(DHCPv4MessagesTypes.Discover),
new DHCPv4PacketClientIdentifierOption(DHCPv4ClientIdentifier.FromIdentifierValue("random test client"))
);
Mock <IScopeResolver <DHCPv4Packet, IPv4Address> > resolverMock = new Mock <IScopeResolver <DHCPv4Packet, IPv4Address> >(MockBehavior.Strict);
resolverMock.Setup(x => x.PacketMeetsCondition(discoverPacket)).Returns(true);
resolverMock.SetupGet(x => x.HasUniqueIdentifier).Returns(false);
Mock <IScopeResolverManager <DHCPv4Packet, IPv4Address> > scopeResolverMock =
new Mock <IScopeResolverManager <DHCPv4Packet, IPv4Address> >(MockBehavior.Strict);
var resolverInformations = new CreateScopeResolverInformation
{
Typename = nameof(DHCPv4RelayAgentSubnetResolver),
};
scopeResolverMock.Setup(x => x.InitializeResolver(resolverInformations)).Returns(resolverMock.Object);
Guid scopeId = random.NextGuid();
Guid leaseId = random.NextGuid();
DateTime leaseCreatedAt = DateTime.UtcNow.AddHours(-1);
DHCPv4RootScope rootScope = GetRootScope(scopeResolverMock);
rootScope.Load(new List <DomainEvent> {
new DHCPv4ScopeEvents.DHCPv4ScopeAddedEvent(
new DHCPv4ScopeCreateInstruction
{
AddressProperties = new DHCPv4ScopeAddressProperties(
IPv4Address.FromString("192.168.178.1"),
IPv4Address.FromString("192.168.178.255"),
new List <IPv4Address> {
IPv4Address.FromString("192.168.178.1")
},
leaseTime: TimeSpan.FromDays(1),
renewalTime: TimeSpan.FromHours(12),
preferredLifetime: TimeSpan.FromHours(18),
reuseAddressIfPossible: true,
acceptDecline: true,
addressAllocationStrategy: DHCPv4ScopeAddressProperties.AddressAllocationStrategies.Next,
supportDirectUnicast: true,
maskLength: 24
),
ResolverInformation = resolverInformations,
Name = "Testscope",
Id = scopeId,
}),
new DHCPv4LeaseCreatedEvent
{
EntityId = leaseId,
Address = leasedAddress,
ClientIdenfier = DHCPv4ClientIdentifier.FromIdentifierValue("random test client").GetBytes(),
ScopeId = scopeId,
UniqueIdentifier = null,
StartedAt = leaseCreatedAt,
ValidUntil = DateTime.UtcNow.AddDays(1),
},
new DHCPv4LeaseActivatedEvent
{
EntityId = leaseId,
ScopeId = scopeId,
},
});
DHCPv4Lease existingLease = rootScope.GetScopeById(scopeId).Leases.GetLeaseById(leaseId);
DHCPv4Packet releaseResult = rootScope.HandleRelease(requestPacket);
Assert.Equal(DHCPv4Packet.Empty, releaseResult);
CheckIfLeaseIsRelease(existingLease);
CheckEventAmount(2, rootScope);
CheckLeaseReleasedEvent(0, scopeId, rootScope, leaseId);
CheckHandeledEvent(1, ReleaseError.NoError, requestPacket, rootScope);
DHCPv4Packet discoveryResult = rootScope.HandleDiscover(discoverPacket);
IPv4Address newAssignedAddress = IPv4Address.FromString("192.168.178.2");
Assert.Equal(newAssignedAddress, discoveryResult.YourIPAdress);
}
public DHCPv4DeclineHandledEvent(DHCPv4Packet request) : this(request, DeclineErros.ScopeNotFound)
{
}
