set IPv6Address type class to struct

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

@@ -62,8 +62,7 @@ public class Dhcp6Server : IDhcpServer, IDisposable
             MacAddress = null
         };
 
-
-        _addrProvider.GetAddress(ctx);
+        await _addrProvider.GetAddress(ctx);
 
         //TODO
     }

src/IPMeow.Dhcp/Standalone/DecoupledAddressProvider.cs

@@ -12,9 +12,9 @@ public class DecoupledIPAddressProvider : IAddressProvider<AddressRequestContext
 
     private readonly HttpClient _http;
 
-    public IPAddress GetAddress(AddressRequestContext ctx)
+    public async Task<IPAddress> GetAddress(AddressRequestContext ctx)
     {
-        _http.GetAsync($"/api/request/{(ctx.IsV6 ? "6" : "4")}/free");
+        var resp = await _http.GetAsync($"/api/request/{(ctx.IsV6 ? "6" : "4")}/free");
         throw new NotImplementedException();
     }
 }

src/IPMeow.Lib/Address/IPv6Address.cs

@@ -3,7 +3,7 @@ using System.Net.Sockets;
 
 namespace IPMeow.Lib.Address;
 
-public class IPv6Address
+public readonly struct IPv6Address
 {
     public IPv6Address(byte[] address)
     {

src/IPMeow.Lib/Address/Prefix.cs

@@ -2,9 +2,9 @@ using System.Net;
 
 namespace IPMeow.Lib.Address;
 
-public abstract class Network
+public abstract class Prefix
 {
     public abstract bool IsInNetwork(IPAddress addr);
 
-    public abstract bool IsSubnetOf(Network n);
+    public abstract bool IsSubnetOf(Prefix n);
 };

src/IPMeow.Lib/Request/IAddressProvider.cs

@@ -4,5 +4,5 @@ namespace IPMeow.Lib.Request;
 
 public interface IAddressProvider<T> where T : AddressRequestContext
 {
-    public IPAddress GetAddress(T ctx);
+    public Task<IPAddress> GetAddress(T ctx);
 }

src/IPMeow.Lib/Site/Network.cs

@@ -9,5 +9,5 @@ public class Network
     [Key]
     public required string Name { get; set; }
     public virtual ICollection<DnsServer> DnsServers { get; set; }
-    public virtual ICollection<Address.Network> Networks { get; set; }
+    public virtual ICollection<Prefix> Networks { get; set; }
 }