public Task <Boolean> ShouldPacketBeFiltered(DHCPv6Packet packet)
{
_logger.LogDebug("ShouldPacketBeFilterd");
if (packet.GetInnerPacket().IsClientRequest() == false)
{
return(Task.FromResult(true));
}
Boolean result = packet.IsConsistent();
return(Task.FromResult(!result));
}
public Task <Boolean> ShouldPacketBeFiltered(DHCPv6Packet packet)
{
_logger.LogDebug("ShouldPacketBeFiltered");
DHCPv6Packet innerPacket = packet.GetInnerPacket();
Boolean couldHaveDuid = innerPacket.CouldHaveDuid();
if (couldHaveDuid == false && innerPacket.ShouldHaveDuid() == false)
{
return(Task.FromResult(false));
}
DUID packetServerDuid = innerPacket.GetIdentifier(DHCPv6PacketOptionTypes.ServerIdentifer);
if (couldHaveDuid == true && packetServerDuid == DUID.Empty)
{
return(Task.FromResult(false));
}
Boolean result = packetServerDuid != _serverDuid;
return(Task.FromResult(result));
}
//[Fact]
public async Task SendAndReceive()
{
Random random = new Random();
String dbName = $"mydb-{random.Next()}";
String prefix = random.GetAlphanumericString();
try
{
UInt32 enterpriseNumber = (UInt32)random.Next();
StorageContext initicalContext = DatabaseTestingUtility.GetTestDatabaseContext(dbName);
await initicalContext.Database.MigrateAsync();
await initicalContext.SaveInitialServerConfiguration(new DHCPv6ServerProperties { ServerDuid = new UUIDDUID(new Guid()) });
initicalContext.Dispose();
IPv6Address expectedAdress = IPv6Address.FromString("fe80::0");
var services = new ServiceCollection();
services.AddScoped <ServiceFactory>(p => p.GetService);
services.AddSingleton <DHCPv6RootScope>(sp =>
{
var storageEngine = sp.GetRequiredService <IDHCPv6StorageEngine>();
var scope = storageEngine.GetRootScope().GetAwaiter().GetResult();
return(scope);
});
services.AddTransient <IDHCPv6ServerPropertiesResolver, DatabaseDHCPv6ServerPropertiesResolver>();
services.AddSingleton <ISerializer, JSONBasedSerializer>();
services.AddSingleton <IScopeResolverManager <DHCPv6Packet, IPv6Address>, DHCPv6ScopeResolverManager>();
services.AddSingleton <IServiceBus, MediaRBasedServiceBus>();
services.AddSingleton <IDHCPv6PacketFilterEngine, SimpleDHCPv6PacketFilterEngine>();
services.AddSingleton <IDHCPv6InterfaceEngine, DHCPv6InterfaceEngine>();
services.AddSingleton <IDHCPv6LeaseEngine, DHCPv6LeaseEngine>();
services.AddSingleton <IDHCPv6StorageEngine, DHCPv6StorageEngine>();
services.AddSingleton <IDHCPv6ReadStore, StorageContext>();
services.AddSingleton(new EventStoreBasedStoreConnenctionOptions(new EventStoreClient(EventStoreClientSettings.Create("esdb://127.0.0.1:2113?tls=false")), prefix));
services.AddSingleton <IDHCPv6EventStore, EventStoreBasedStore>();
services.AddSingleton(DatabaseTestingUtility.GetTestDbContextOptions(dbName));
services.AddTransient <INotificationHandler <DHCPv6PacketArrivedMessage> >(sp => new DHCPv6PacketArrivedMessageHandler(
sp.GetRequiredService <IServiceBus>(), sp.GetRequiredService <IDHCPv6PacketFilterEngine>(), sp.GetService <ILogger <DHCPv6PacketArrivedMessageHandler> >()));
services.AddTransient <INotificationHandler <ValidDHCPv6PacketArrivedMessage> >(sp => new ValidDHCPv6PacketArrivedMessageHandler(
sp.GetRequiredService <IServiceBus>(), sp.GetRequiredService <IDHCPv6LeaseEngine>(), sp.GetService <ILogger <ValidDHCPv6PacketArrivedMessageHandler> >()));
services.AddTransient <INotificationHandler <DHCPv6PacketReadyToSendMessage> >(sp => new DHCPv6PacketReadyToSendMessageHandler(
sp.GetRequiredService <IDHCPv6InterfaceEngine>(), sp.GetService <ILogger <DHCPv6PacketReadyToSendMessageHandler> >()));
services.AddTransient <DHCPv6RateLimitBasedFilter>();
services.AddTransient <DHCPv6PacketConsistencyFilter>();
services.AddTransient <DHCPv6PacketServerIdentifierFilter>((sp) => new DHCPv6PacketServerIdentifierFilter(
new UUIDDUID(new Guid()), sp.GetService <ILogger <DHCPv6PacketServerIdentifierFilter> >()));
services.AddLogging();
var provider = services.BuildServiceProvider();
DHCPv6RootScope initialRootScope = provider.GetService <DHCPv6RootScope>();
initialRootScope.AddScope(new DHCPv6ScopeCreateInstruction
{
AddressProperties = new DHCPv6ScopeAddressProperties(
IPv6Address.FromString("fe80::0"),
IPv6Address.FromString("fe80::ff"),
new List <IPv6Address> {
IPv6Address.FromString("fe80::1")
},
preferredLifeTime: TimeSpan.FromDays(0.5),
validLifeTime: TimeSpan.FromDays(1),
rapitCommitEnabled: true,
informsAreAllowd: true,
supportDirectUnicast: true,
reuseAddressIfPossible: false,
acceptDecline: true,
t1: DHCPv6TimeScale.FromDouble(0.6),
t2: DHCPv6TimeScale.FromDouble(0.8),
addressAllocationStrategy: DHCPv6ScopeAddressProperties.AddressAllocationStrategies.Next),
ScopeProperties = DHCPv6ScopeProperties.Empty,
ResolverInformation = new CreateScopeResolverInformation
{
Typename = nameof(DHCPv6RemoteIdentifierEnterpriseNumberResolver),
PropertiesAndValues = new Dictionary <String, String>
{
{ nameof(DHCPv6RemoteIdentifierEnterpriseNumberResolver.EnterpriseNumber), enterpriseNumber.ToString() },
{ nameof(DHCPv6RemoteIdentifierEnterpriseNumberResolver.RelayAgentIndex), 0.ToString() },
}
},
Name = "Testscope",
Id = Guid.NewGuid(),
});
IDHCPv6PacketFilterEngine packetFilterEngine = provider.GetService <IDHCPv6PacketFilterEngine>();
packetFilterEngine.AddFilter(provider.GetService <DHCPv6RateLimitBasedFilter>());
packetFilterEngine.AddFilter(provider.GetService <DHCPv6PacketConsistencyFilter>());
packetFilterEngine.AddFilter(provider.GetService <DHCPv6PacketServerIdentifierFilter>());
IDHCPv6InterfaceEngine interfaceEngine = provider.GetService <IDHCPv6InterfaceEngine>();
var possibleListener = interfaceEngine.GetPossibleListeners();
var listener = possibleListener.First();
interfaceEngine.OpenListener(listener);
IPAddress address = new IPAddress(listener.Address.GetBytes());
IPEndPoint ownEndPoint = new IPEndPoint(address, 546);
IPEndPoint serverEndPoint = new IPEndPoint(address, 547);
UdpClient client = new UdpClient(ownEndPoint);
DHCPv6Packet packet = DHCPv6Packet.AsInner(14, DHCPv6PacketTypes.Solicit, new List <DHCPv6PacketOption>
{
new DHCPv6PacketTrueOption(DHCPv6PacketOptionTypes.RapitCommit),
new DHCPv6PacketIdentifierOption(DHCPv6PacketOptionTypes.ClientIdentifier, new UUIDDUID(Guid.NewGuid())),
new DHCPv6PacketIdentityAssociationNonTemporaryAddressesOption(15, TimeSpan.Zero, TimeSpan.Zero, new List <DHCPv6PacketSuboption>()),
});
DHCPv6RelayPacket outerPacket = DHCPv6RelayPacket.AsOuterRelay(new IPv6HeaderInformation(listener.Address, listener.Address),
true, 0, IPv6Address.FromString("fe80::2"), IPv6Address.FromString("fe80::2"), new DHCPv6PacketOption[]
{
new DHCPv6PacketRemoteIdentifierOption(enterpriseNumber, new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 }),
}, packet);
byte[] packetStream = outerPacket.GetAsStream();
await client.SendAsync(packetStream, packetStream.Length, serverEndPoint);
await Task.Delay(2000);
var content = await client.ReceiveAsync();
Byte[] receivedBytes = content.Buffer;
DHCPv6Packet response = DHCPv6Packet.FromByteArray(receivedBytes, new IPv6HeaderInformation(listener.Address, listener.Address));
var iaOption = response.GetInnerPacket().GetNonTemporaryIdentiyAssocation(15);
Assert.NotNull(iaOption);
Assert.Single(iaOption.Suboptions);
Assert.IsAssignableFrom <DHCPv6PacketIdentityAssociationAddressSuboption>(iaOption.Suboptions.First());
Assert.Equal(expectedAdress, ((DHCPv6PacketIdentityAssociationAddressSuboption)iaOption.Suboptions.First()).Address);
}
finally
{
await DatabaseTestingUtility.DeleteDatabase(dbName);
await EventStoreClientDisposer.CleanUp(prefix, null);
}
}
protected static void CheckErrorPacket(DHCPv6Packet request,
IPv6Address expectedAdress, UInt32 iaId, DHCPv6Packet response, DHCPv6PrefixDelegation prefixDelegation, DHCPv6StatusCodes expectedStatusCode)
{
Assert.NotNull(response);
Assert.NotEqual(DHCPv6Packet.Empty, response);
Assert.True(response.IsValid);
Assert.Equal(DHCPv6PacketTypes.REPLY, response.GetInnerPacket().PacketType);
CheckIfPacketIsCorrectReply(request, response);
if (iaId != 0)
{
var iaOption = response.GetInnerPacket().GetNonTemporaryIdentiyAssocation(iaId);
Assert.NotNull(iaOption);
Assert.Equal(TimeSpan.Zero, iaOption.T1);
Assert.Equal(TimeSpan.Zero, iaOption.T2);
var uncastedSuboption = iaOption.Suboptions.First();
Assert.NotNull(uncastedSuboption);
Assert.IsAssignableFrom <DHCPv6PacketIdentityAssociationAddressSuboption>(uncastedSuboption);
var addressSubOption = (DHCPv6PacketIdentityAssociationAddressSuboption)uncastedSuboption;
Assert.Equal(expectedAdress, addressSubOption.Address);
Assert.Equal(TimeSpan.Zero, addressSubOption.PreferredLifetime);
Assert.Equal(TimeSpan.Zero, addressSubOption.ValidLifetime);
Assert.NotEmpty(addressSubOption.Suboptions);
Assert.Single(addressSubOption.Suboptions);
var uncastedSubSuboption = addressSubOption.Suboptions.First();
Assert.NotNull(uncastedSubSuboption);
Assert.IsAssignableFrom <DHCPv6PacketStatusCodeSuboption>(uncastedSubSuboption);
var statusSubOption = (DHCPv6PacketStatusCodeSuboption)uncastedSubSuboption;
Assert.Equal((UInt16)expectedStatusCode, statusSubOption.StatusCode);
//Assert.False(String.IsNullOrEmpty(statusSubOption.Message));
}
if (prefixDelegation != DHCPv6PrefixDelegation.None)
{
var iaOption = response.GetInnerPacket().GetPrefixDelegationIdentiyAssocation(prefixDelegation.IdentityAssociation);
Assert.NotNull(iaOption);
Assert.Equal(prefixDelegation.IdentityAssociation, iaOption.Id);
Assert.Equal(TimeSpan.Zero, iaOption.T1);
Assert.Equal(TimeSpan.Zero, iaOption.T2);
Assert.NotEmpty(iaOption.Suboptions);
Assert.Single(iaOption.Suboptions);
var uncastedSuboption = iaOption.Suboptions.First();
Assert.NotNull(uncastedSuboption);
Assert.IsAssignableFrom <DHCPv6PacketIdentityAssociationPrefixDelegationSuboption>(uncastedSuboption);
var addressSubOption = (DHCPv6PacketIdentityAssociationPrefixDelegationSuboption)uncastedSuboption;
Assert.Equal(prefixDelegation.Mask.Identifier, addressSubOption.PrefixLength);
Assert.NotEmpty(addressSubOption.Suboptions);
Assert.Single(addressSubOption.Suboptions);
Assert.Equal(TimeSpan.Zero, addressSubOption.PreferredLifetime);
Assert.Equal(TimeSpan.Zero, addressSubOption.ValidLifetime);
var uncastedSubSuboption = addressSubOption.Suboptions.First();
Assert.NotNull(uncastedSubSuboption);
Assert.IsAssignableFrom <DHCPv6PacketStatusCodeSuboption>(uncastedSubSuboption);
var statusSubOption = (DHCPv6PacketStatusCodeSuboption)uncastedSubSuboption;
Assert.Equal((UInt16)(expectedStatusCode == DHCPv6StatusCodes.NoAddrsAvail ? DHCPv6StatusCodes.NoPrefixAvail : expectedStatusCode), statusSubOption.StatusCode);
//Assert.False(String.IsNullOrEmpty(statusSubOption.Message));
}
}
