Establish DI. Refactor address structures.

.nyoki

@@ -0,0 +1,3 @@
+{
+  "instanceId": "792b8690-893e-4c08-af61-1dd602d96cd4"
+}

.vscode/settings.json

@@ -0,0 +1,6 @@
+{
+    "sonarlint.connectedMode.project": {
+        "connectionId": "",
+        "projectKey": ""
+    }
+}

src/IPMeow.Dhcp/IPMeow.Dhcp.csproj

@@ -4,6 +4,10 @@
     <ProjectReference Include="..\IPMeow.Lib\IPMeow.Lib.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="7.0.1" />
+  </ItemGroup>
+
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>net7.0</TargetFramework>

src/IPMeow.Dhcp/Program.cs

@@ -1,4 +1,6 @@
 using IPMeow.Dhcp.Server.Dhcp4;
+using IPMeow.Lib.Host;
+using Microsoft.Extensions.Hosting;
 
 namespace IPMeow.Dhcp
 {
@@ -6,10 +8,11 @@ namespace IPMeow.Dhcp
     {
         public static async Task Main(string[] args)
         {
-            Console.WriteLine("Listening on DHCP...");
-            var dhcp = new DhcpServer();
+            var app = Microsoft.Extensions.Hosting.Host.CreateDefaultBuilder(args).Build();
 
-            await dhcp.Run();
+            Console.WriteLine("Listening on DHCP...");
+
+            await app.RunAsync();
         }
     }
 }

src/IPMeow.Dhcp/Server/Dhcp4/DhcpServer.cs

@@ -1,17 +1,23 @@
 using System.Net;
 using System.Net.Sockets;
+using IPMeow.Lib.Address;
 
 namespace IPMeow.Dhcp.Server.Dhcp4;
 
-public class DhcpServer
+public class Dhcp4Server : IDhcpServer, IDisposable
 {
     public const int clientPort = 68, serverPort = 67;
 
-    public DhcpServer()
+    public Dhcp4Server(IAddressProvider addressProvider)
     {
+        _addrProvider = addressProvider;
         _udp = new UdpClient(serverPort, AddressFamily.InterNetwork);
     }
 
+    private readonly IAddressProvider _addrProvider;
+
+    public event EventHandler<DhcpRequestEvent> DhcpRequestedEvent;
+
     public async Task Run()
     {
         while (true)
@@ -61,9 +67,13 @@ public class DhcpServer
             return false;
         }
 
-
         return true;
     }
 
+    public void Dispose()
+    {
+        throw new NotImplementedException();
+    }
+
     private readonly UdpClient _udp;
 }

src/IPMeow.Dhcp/Server/Dhcp6/DhcpServer.cs

@@ -1,18 +1,24 @@
 using System.Net;
 using System.Net.Sockets;
+using IPMeow.Lib.Address;
 
 namespace IPMeow.Dhcp.Server.Dhcp6;
 
-public class DhcpServer : IDhcpServer, IDisposable
+public class Dhcp6Server : IDhcpServer, IDisposable
 {
     public const int clientPort = 546, serverPort = 547;
 
-    public DhcpServer()
+    public Dhcp6Server(IAddressProvider addressProvider)
     {
+        _addrProvider = addressProvider;
         _listener = new(new IPEndPoint(IPAddress.Parse("ff02::1:2"), serverPort));
         _sender = new(clientPort, AddressFamily.InterNetworkV6);
     }
-    private UdpClient _listener, _sender;
+
+    private readonly IAddressProvider _addrProvider;
+    private readonly UdpClient _listener, _sender;
+
+    public event EventHandler<DhcpRequestEvent> DhcpRequestedEvent;
 
     public void Dispose()
     {

src/IPMeow.Dhcp/Server/DhcpEvent.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Threading.Tasks;
+using IPMeow.Lib.Address;
+
+namespace IPMeow.Dhcp.Server;
+
+public class DhcpRequestEvent
+{
+    public bool IsV6 { get; init; }
+    public IPAddress? RequestOrigin { get; init; }
+    public MacAddress? MacAddress { get; init; }
+}

src/IPMeow.Dhcp/Server/IDhcpServer.cs

@@ -2,5 +2,7 @@ namespace IPMeow.Dhcp.Server;
 
 public interface IDhcpServer
 {
-    public Task Run();
+    Task Run();
+
+    event EventHandler<DhcpRequestEvent> DhcpRequestedEvent;
 }

src/IPMeow.Dhcp/Standalone/DecoupledAddressProvider.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Threading.Tasks;
+using IPMeow.Lib.Address;
+
+namespace IPMeow.Dhcp.Standalone;
+public class DecoupledIPv6AddressProvider : IPv6AddressProvider
+{
+    public DecoupledIPv6AddressProvider(HttpClient http)
+    {
+        _http = http;
+    }
+
+    private readonly HttpClient _http;
+
+    public IPv6Address GetAddress()
+    {
+        _http.GetAsync("/api/request/6/free");
+            throw new NotImplementedException();
+    }
+
+    public IPv6Address GetAddress(MacAddress mac)
+    {
+        throw new NotImplementedException();
+    }
+}
+
+public class DecoupledIPv4AddressProvider : IPv4AddressProvider
+{
+    public DecoupledIPv4AddressProvider(HttpClient http)
+    {
+        _http = http;
+    }
+
+    private readonly HttpClient _http;
+
+    public IPv4Address GetAddress()
+    {
+        _http.GetAsync("/api/request/4/free");
+        throw new NotImplementedException();
+    }
+
+    public IPv4Address GetAddress(MacAddress mac)
+    {
+        _http.GetAsync($"/api/request/4/mac/{mac}");
+        throw new NotImplementedException();
+    }
+}

src/IPMeow.Lib/Address/IAddressProvider.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Threading.Tasks;
+
+namespace IPMeow.Lib.Address;
+
+public interface IAddressProvider
+{
+    public IPAddress GetAddress();
+    public IPAddress GetAddress(MacAddress mac);
+}
+
+public interface IPv4AddressProvider
+{
+    public IPv4Address GetAddress();
+    public IPv4Address GetAddress(MacAddress mac);
+}
+
+public interface IPv6AddressProvider
+{
+    public IPv6Address GetAddress();
+    public IPv6Address GetAddress(MacAddress mac);
+}

src/IPMeow.Lib/Address/IPv4Address.cs

@@ -1,9 +1,10 @@
+using System.Diagnostics.CodeAnalysis;
 using System.Net;
 using System.Net.Sockets;
 
 namespace IPMeow.Lib.Address;
 
-public class IPv4Address
+public readonly struct IPv4Address
 {
     public IPv4Address(byte[] bytes)
     {
@@ -32,4 +33,24 @@ public class IPv4Address
 
     private readonly uint _addr;
     public static implicit operator IPAddress(IPv4Address addr) => new(addr._addr);
+
+    public override bool Equals([NotNullWhen(true)] object? obj)
+    {
+        return obj is IPv4Address addr && addr._addr == _addr;
+    }
+
+    public override int GetHashCode()
+    {
+        return Math.Abs((int)_addr);
+    }
+
+    public override string ToString()
+    {
+        byte o4 = (byte)(_addr & 0x000000ff),
+             o3 = (byte)(_addr & 0x0000ff00 >> 8),
+             o2 = (byte)(_addr & 0x00ff0000 >> 16),
+             o1 = (byte)(_addr & 0xff000000 >> 24);
+        
+        return $"{o1}.{o2}.{o3}.{o4}";
+    }
 }

src/IPMeow.Lib/Address/IPv6Address.cs

@@ -27,4 +27,19 @@ public class IPv6Address
 
     private readonly byte[] _addr;
     public static implicit operator IPAddress(IPv6Address addr) => new(addr._addr);
+
+    public override bool Equals(object? obj)
+    {
+        return obj is IPv6Address addr && _addr.SequenceEqual(addr._addr);
+    }
+
+    public override int GetHashCode()
+    {
+        return _addr.GetHashCode();
+    }
+
+    public override string? ToString()
+    {
+        return new IPAddress(_addr).ToString();
+    }
 }