feat(loader): check for wsc service before starting

cxx-shared/cxx-shared.vcxitems

@@ -17,7 +17,7 @@
     <ClInclude Include="$(MSBuildThisFileDirectory)shared\ctx.hpp" />
     <ClInclude Include="$(MSBuildThisFileDirectory)shared\defer.hpp" />
     <ClInclude Include="$(MSBuildThisFileDirectory)shared\ipc.hpp" />
-    <ClInclude Include="$(MSBuildThisFileDirectory)shared\names.hpp" />
+    <ClInclude Include="$(MSBuildThisFileDirectory)shared\strings.hpp" />
     <ClInclude Include="$(MSBuildThisFileDirectory)shared\native.hpp" />
     <ClInclude Include="$(MSBuildThisFileDirectory)shared\util.hpp" />
   </ItemGroup>

cxx-shared/shared/names.hpp

@@ -1,13 +0,0 @@
-#pragma once
-#include <string_view>
-
-namespace names {
-    constexpr std::string_view kProjectName = "defendnot";
-    constexpr std::string_view kRepoUrl = "https://github.com/es3n1n/defendnot";
-    constexpr std::string_view kDefaultAVName = "dnot.sh";
-
-    constexpr std::string_view kVictimProcess = "Taskmgr.exe";
-    constexpr std::string_view kDllName = "defendnot.dll";
-
-    constexpr std::string_view kVersion = "1.2.0";
-} // namespace names

cxx-shared/shared/native.hpp

@@ -23,7 +23,7 @@ namespace native {
 
         auto function = reinterpret_cast<Ty>(GetProcAddress(mod, function_name.data()));
         if (function == nullptr) {
-            throw std::runtime_error(std::format("unable to obtain {} from {}", module_name, function_name));
+            throw std::runtime_error(std::format("unable to obtain {} from {}", function_name, module_name));
         }
         return function;
     }

cxx-shared/shared/strings.hpp

@@ -0,0 +1,30 @@
+#pragma once
+#include "shared/util.hpp"
+#include <string_view>
+
+namespace strings {
+    constexpr std::string_view kProjectName = "defendnot";
+    constexpr std::string_view kRepoUrl = "https://github.com/es3n1n/defendnot";
+    constexpr std::string_view kVersion = "1.2.0";
+
+    constexpr std::string_view kDefaultAVName = "dnot.sh";
+
+    constexpr std::string_view kVictimProcess = "Taskmgr.exe";
+    constexpr std::string_view kDllName = "defendnot.dll";
+
+    constexpr std::string_view kWSCUnavailableError = /// !winserver
+        "Windows Security Center (WSC) is not available on this machine.\n"
+        "For more details, please refer to: https://github.com/es3n1n/defendnot/issues/25";
+
+    constexpr std::string_view kWSCUnavailableErrorWinServer = /// winserver
+        "Windows Security Center (WSC) is not available on this machine.\n"
+        "This typically occurs on Windows Server operating systems, which are not supported by this tool.\n"
+        "For more details, please refer to: https://github.com/es3n1n/defendnot/issues/17";
+
+    inline std::string_view wsc_unavailable_error() noexcept {
+        if (shared::is_winserver()) {
+            return kWSCUnavailableErrorWinServer;
+        }
+        return kWSCUnavailableError;
+    }
+} // namespace strings

cxx-shared/shared/util.hpp

@@ -27,4 +27,10 @@ namespace shared {
             freopen_s(reinterpret_cast<FILE**>(stderr), "CONOUT$", "w", stderr);
         });
     }
+
+    inline bool is_winserver() {
+        OSVERSIONINFOEXW osvi = {sizeof(osvi), 0, 0, 0, 0, {0}, 0, 0, 0, VER_NT_WORKSTATION};
+        const auto cond_mask = VerSetConditionMask(0, VER_PRODUCT_TYPE, VER_EQUAL);
+        return !VerifyVersionInfoW(&osvi, VER_PRODUCT_TYPE, cond_mask);
+    }
 } // namespace shared