fix: port to KHook for Metamod 2.0 build 1461+

Metamod 1461+ removed SourceHook (plugin API 17 -> 18), so the MM plugin was rejected
and RayTraceImpl crashed on a null CRayTraceInterface002. Replace the two SourceHook
hooks with KHook, build against Metamod's bundled KHook headers, include ray.h
explicitly for the updated hl2sdk, and disambiguate TraceOptions/TraceResult from
CounterStrikeSharp 1.0.375's new types of the same name.

CMakeLists.txt

@@ -41,11 +41,6 @@ list(APPEND SOURCE_FILES
     ${SOURCESDK_DIR}/entity2/entityidentity.cpp
     ${SOURCESDK_DIR}/entity2/entitysystem.cpp
     ${SOURCESDK_DIR}/entity2/entitykeyvalues.cpp
-    ${METAMOD_DIR}/core/sourcehook/sourcehook.cpp
-    ${METAMOD_DIR}/core/sourcehook/sourcehook_impl_chookidman.cpp
-    ${METAMOD_DIR}/core/sourcehook/sourcehook_impl_chookmaninfo.cpp
-    ${METAMOD_DIR}/core/sourcehook/sourcehook_impl_cvfnptr.cpp
-    ${METAMOD_DIR}/core/sourcehook/sourcehook_impl_cproto.cpp
     vendor/dynlibutils/module.cpp
     vendor/dynlibutils/module.h
 )

makefiles/shared.cmake

@@ -59,8 +59,7 @@ include_directories(
     ${SOURCESDK}/public/game/server
     ${SOURCESDK}/public/schemasystem
     ${METAMOD_DIR}/core
-    ${METAMOD_DIR}/core/sourcehook
-    vendor/khook/include
+    ${METAMOD_DIR}/third_party/khook/include
     vendor/spdlog/include
     vendor/nlohmann
     vendor

managed/RayTrace/RayTraceImpl/RayTraceImpl.cs

@@ -21,6 +21,8 @@ using CounterStrikeSharp.API.Modules.Memory;
 using CounterStrikeSharp.API.Modules.Utils;
 using RayTraceAPI;
 using Vector = CounterStrikeSharp.API.Modules.Utils.Vector;
+using TraceOptions = RayTraceAPI.TraceOptions;
+using TraceResult = RayTraceAPI.TraceResult;
 
 namespace RayTraceImpl;
 

src/listeners/listeners.cpp

@@ -1,4 +1,4 @@
-//
+//
 // Created by Michal Přikryl on 10.07.2025.
 // Copyright (c) 2025 slynxcz. All rights reserved.
 //
@@ -6,32 +6,45 @@
 #include <raytrace.h>
 #include <shared.h>
 #include <dynlibutils/module.h>
+#include <khook.hpp>
 
 class GameSessionConfiguration_t
 {
 };
 
 namespace RayTracePlugin::Listeners {
-    SourceHooks sourceHooks;
+    // Metamod 2.0 build 1461+ dropped SourceHook for KHook; these replace the old SH_DECL_HOOK*s.
+    static KHook::Return<void> Hook_StartupServer(INetworkServerService*, const GameSessionConfiguration_t&,
+                                                  ISource2WorldSession*, const char*);
+    static KHook::Return<int> Hook_LoadEventsFromFile(IGameEventManager2* self, const char* filename, bool bSearchAll);
 
-    SH_DECL_HOOK3_void(INetworkServerService, StartupServer, SH_NOATTRIB, 0, const GameSessionConfiguration_t&, ISource2WorldSession*, const char*);
-    SH_DECL_HOOK2(IGameEventManager2, LoadEventsFromFile, SH_NOATTRIB, 0, int, const char*, bool);
+    static KHook::Virtual<INetworkServerService, void, const GameSessionConfiguration_t&, ISource2WorldSession*, const char*>
+        g_StartupServer(&INetworkServerService::StartupServer, nullptr, &Hook_StartupServer);
 
-    int g_iLoadEventsFromFileId = -1;
+    static KHook::Virtual<IGameEventManager2, int, const char*, bool>
+        g_LoadEventsFromFile(&IGameEventManager2::LoadEventsFromFile, &Hook_LoadEventsFromFile, nullptr);
+
+    // AddGlobal() reads the vtable from the first word of the "object" it is given, so hooking a raw
+    // vtable (the old SH_ADD_DVPHOOK) means passing a pointer to a slot that holds the vtable address.
+    static void* g_pGameEventManagerVTable = nullptr;
 
     void InitListeners() {
-        SH_ADD_HOOK(INetworkServerService, StartupServer, shared::g_pNetworkServerService, SH_MEMBER(&sourceHooks, &SourceHooks::Hook_StartupServer), true);
-        auto pCGameEventManagerVTable = DynLibUtils::CModule(shared::g_pServer).GetVirtualTableByName("CGameEventManager").RCast<IGameEventManager2*>();
-        g_iLoadEventsFromFileId = SH_ADD_DVPHOOK(IGameEventManager2, LoadEventsFromFile, pCGameEventManagerVTable, SH_MEMBER(&sourceHooks, &SourceHooks::Hook_LoadEventsFromFile), false);
+        g_StartupServer.Add(shared::g_pNetworkServerService);
+
+        g_pGameEventManagerVTable = DynLibUtils::CModule(shared::g_pServer).GetVirtualTableByName("CGameEventManager").RCast<void*>();
+        if (g_pGameEventManagerVTable)
+            g_LoadEventsFromFile.AddGlobal(reinterpret_cast<IGameEventManager2*>(&g_pGameEventManagerVTable));
     }
 
     void DestructListeners() {
-        SH_REMOVE_HOOK(INetworkServerService, StartupServer, shared::g_pNetworkServerService, SH_MEMBER(&sourceHooks, &SourceHooks::Hook_StartupServer), true);
-        SH_REMOVE_HOOK_ID(g_iLoadEventsFromFileId);
+        g_StartupServer.Remove(shared::g_pNetworkServerService);
+
+        if (g_pGameEventManagerVTable)
+            g_LoadEventsFromFile.RemoveGlobal(reinterpret_cast<IGameEventManager2*>(&g_pGameEventManagerVTable));
     }
 
-    void SourceHooks::Hook_StartupServer(const GameSessionConfiguration_t& config,
-                                            ISource2WorldSession*, const char*)
+    static KHook::Return<void> Hook_StartupServer(INetworkServerService*, const GameSessionConfiguration_t&,
+                                                  ISource2WorldSession*, const char*)
     {
         if (!shared::g_bDetoursLoaded)
         {
@@ -39,11 +52,12 @@ namespace RayTracePlugin::Listeners {
             RayTrace::g_CRayTrace.Initialize();
             shared::g_bDetoursLoaded = true;
         }
+        return { KHook::Action::Ignore };
     }
 
-    int SourceHooks::Hook_LoadEventsFromFile(const char* filename, bool bSearchAll)
+    static KHook::Return<int> Hook_LoadEventsFromFile(IGameEventManager2* self, const char* filename, bool bSearchAll)
     {
-        ExecuteOnce(shared::g_pGameEventManager = META_IFACEPTR(IGameEventManager2));
-        RETURN_META_VALUE(MRES_IGNORED, 0);
+        ExecuteOnce(shared::g_pGameEventManager = self);
+        return { KHook::Action::Ignore, 0 };
     }
 }

src/listeners/listeners.h

@@ -4,19 +4,10 @@
 //
 #pragma once
 #include <eiface.h>
-#include <sourcehook.h>
 #include <iserver.h>
 
 namespace RayTracePlugin::Listeners {
     void InitListeners();
 
     void DestructListeners();
-
-    class SourceHooks {
-    public:
-        void Hook_StartupServer(const GameSessionConfiguration_t& config, ISource2WorldSession*, const char*);
-        int Hook_LoadEventsFromFile(const char* filename, bool bSearchAll);
-    };
-
-    extern SourceHooks sourceHooks;
 }

src/schema/globaltypes.h

@@ -5,6 +5,7 @@
 #pragma once
 #include <platform.h>
 #include "soundflags.h"
+#include <ray.h>
 
 // struct TransmitInfo
 // {

src/shared.cpp

@@ -6,8 +6,6 @@
 #include <icvar.h>
 #include <iserver.h>
 #include <schemasystem.h>
-#include <sourcehook/sourcehook.h>
-#include <sourcehook/sourcehook_impl.h>
 
 namespace RayTracePlugin::shared
 {
@@ -27,11 +25,6 @@ namespace RayTracePlugin::shared
     CGameResourceService *g_pGameResourceServiceServer = nullptr;
     CGameConfig *g_pGameConfig = nullptr;
 
-    SourceHook::Impl::CSourceHookImpl source_hook_impl;
-    SourceHook::ISourceHook* source_hook = &source_hook_impl;
-
-    int source_hook_pluginid = 0;
-
     CGlobalVars *getGlobalVars() {
         INetworkGameServer *server = g_pNetworkServerService->GetIGameServer();
         if (!server) return nullptr;

src/shared.h

@@ -11,7 +11,6 @@
 #include <gameconfig.h>
 #include <igameeventsystem.h>
 #include "schema/cgameresourceserviceserver.h"
-#include <sourcehook/sourcehook.h>
 
 class CGameEntitySystem;
 
@@ -33,15 +32,8 @@ namespace RayTracePlugin::shared
     extern CGameResourceService* g_pGameResourceServiceServer;
     extern CGameConfig *g_pGameConfig;
 
-    extern SourceHook::ISourceHook *source_hook;
-    extern int source_hook_pluginid;
-
     CGlobalVars* getGlobalVars();
 
     extern bool g_bDetoursLoaded;
 }
 
-#undef SH_GLOB_SHPTR
-#define SH_GLOB_SHPTR RayTracePlugin::shared::source_hook
-#undef SH_GLOB_PLUGPTR
-#define SH_GLOB_PLUGPTR RayTracePlugin::shared::source_hook_pluginid