1 files changed, 97 insertions, 0 deletions
diff --git a/src/Ryujinx.HLE/HOS/Services/Sockets/Nsd/Manager/FqdnResolver.cs b/src/Ryujinx.HLE/HOS/Services/Sockets/Nsd/Manager/FqdnResolver.cs
new file mode 100644
index 00000000..4096e431
--- /dev/null
+++ b/src/Ryujinx.HLE/HOS/Services/Sockets/Nsd/Manager/FqdnResolver.cs
@@ -0,0 +1,97 @@
+using System.Text;
+
+namespace Ryujinx.HLE.HOS.Services.Sockets.Nsd.Manager
+{
+    class FqdnResolver
+    {
+        private const string _dummyAddress = "unknown.dummy.nintendo.net";
+
+        public ResultCode GetEnvironmentIdentifier(out string identifier)
+        {
+            if (IManager.NsdSettings.TestMode)
+            {
+                identifier = "err";
+
+                return ResultCode.InvalidSettingsValue;
+            }
+            else
+            {
+                identifier = IManager.NsdSettings.Environment;
+            }
+
+            return ResultCode.Success;
+        }
+
+        public static ResultCode Resolve(string address, out string resolvedAddress)
+        {
+            if (address == "api.sect.srv.nintendo.net"     ||
+                address == "ctest.cdn.nintendo.net"        ||
+                address == "ctest.cdn.n.nintendoswitch.cn" ||
+                address == "unknown.dummy.nintendo.net")
+            {
+                resolvedAddress = address;
+            }
+            else
+            {
+                // TODO: Load Environment from the savedata.
+                address = address.Replace("%", IManager.NsdSettings.Environment);
+
+                resolvedAddress = "";
+
+                if (IManager.NsdSettings == null)
+                {
+                    return ResultCode.SettingsNotInitialized;
+                }
+
+                if (!IManager.NsdSettings.Initialized)
+                {
+                    return ResultCode.SettingsNotLoaded;
+                }
+
+                resolvedAddress = address switch
+                {
+                    "e97b8a9d672e4ce4845ec6947cd66ef6-sb-api.accounts.nintendo.com" => "e97b8a9d672e4ce4845ec6947cd66ef6-sb.baas.nintendo.com", // dp1 environment
+                    "api.accounts.nintendo.com"                                     => "e0d67c509fb203858ebcb2fe3f88c2aa.baas.nintendo.com",    // dp1 environment
+                    "e97b8a9d672e4ce4845ec6947cd66ef6-sb.accounts.nintendo.com"     => "e97b8a9d672e4ce4845ec6947cd66ef6-sb.baas.nintendo.com", // lp1 environment
+                    "accounts.nintendo.com"                                         => "e0d67c509fb203858ebcb2fe3f88c2aa.baas.nintendo.com",    // lp1 environment
+                    /*
+                        // TODO: Determine fields of the struct.
+                        this + 0xEB8  => this + 0xEB8 + 0x300
+                        this + 0x2BE8 => this + 0x2BE8 + 0x300
+                    */
+                    _ => address,
+                };
+            }
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode ResolveEx(ServiceCtx context, out ResultCode resultCode, out string resolvedAddress)
+        {
+            ulong inputPosition = context.Request.SendBuff[0].Position;
+            ulong inputSize     = context.Request.SendBuff[0].Size;
+
+            byte[] addressBuffer = new byte[inputSize];
+
+            context.Memory.Read(inputPosition, addressBuffer);
+
+            string address = Encoding.UTF8.GetString(addressBuffer).TrimEnd('\0');
+
+            resultCode = Resolve(address, out resolvedAddress);
+
+            if (resultCode != ResultCode.Success)
+            {
+                resolvedAddress = _dummyAddress;
+            }
+
+            if (IManager.NsdSettings.TestMode)
+            {
+                return ResultCode.Success;
+            }
+            else
+            {
+                return resultCode;
+            }
+        }
+    }
+}
+\ No newline at end of file