mirror of
https://github.com/alliedmodders/metamod-source.git
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306 lines
7.5 KiB
C++
306 lines
7.5 KiB
C++
/**
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* vim: set ts=4 sw=4 tw=99 noet :
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* ======================================================
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* Metamod:Source
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* Copyright (C) 2004-2009 AlliedModders LLC and authors.
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* All rights reserved.
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* ======================================================
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*
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* This software is provided 'as-is', without any express or implied warranty.
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* In no event will the authors be held liable for any damages arising from
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* the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software in a
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* product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include <stddef.h>
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#include "loader.h"
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#include <sh_memfuncinfo.h>
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#include <sh_memory.h>
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#include "serverplugin.h"
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#include "gamedll.h"
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typedef enum
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{
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PLUGIN_CONTINUE = 0,
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PLUGIN_OVERRIDE,
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PLUGIN_STOP,
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} PLUGIN_RESULT;
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typedef enum
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{
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eQueryCvarValueStatus_ValueIntact=0,
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eQueryCvarValueStatus_CvarNotFound=1,
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eQueryCvarValueStatus_NotACvar=2,
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eQueryCvarValueStatus_CvarProtected=3
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} EQueryCvarValueStatus;
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typedef int QueryCvarCookie_t;
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class CCommand;
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class IServerPluginCallbacks;
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struct edict_t;
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class IRandomThings
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{
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public:
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virtual PLUGIN_RESULT ClientCommand(edict_t *pEntity, const CCommand& args)
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{
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return PLUGIN_CONTINUE;
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}
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};
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IVspBridge *vsp_bridge = NULL;
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/**
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* The vtable must match the general layout for ISPC. We modify the vtable
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* based on what we get back.
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*/
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class ServerPlugin
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{
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char game_name[128];
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unsigned int vsp_version;
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bool load_allowed;
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public:
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ServerPlugin()
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{
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load_allowed = false;
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}
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virtual bool Load(QueryValveInterface engineFactory, QueryValveInterface gsFactory)
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{
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if (!load_allowed)
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return false;
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load_allowed = false;
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/* Backend should already filled in if loaded as gamedll */
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if (gamedll_bridge == NULL)
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{
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mm_GetGameName(game_name, sizeof(game_name));
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mm_backend = mm_DetermineBackend(engineFactory, gsFactory, game_name);
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}
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if (mm_backend == MMBackend_UNKNOWN)
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{
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mm_LogFatal("Could not detect engine version");
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return false;
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}
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void **this_vtable;
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this_vtable = (void **)*(void **)this;
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if (mm_backend != MMBackend_Episode1
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&& mm_backend != MMBackend_DarkMessiah)
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{
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/* We need to insert the right type of call into this vtable */
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void **vtable_src;
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IRandomThings sample;
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SourceHook::MemFuncInfo mfp_dest, mfp_src;
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mfp_dest.isVirtual = false;
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mfp_src.isVirtual = false;
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SourceHook::GetFuncInfo(&ServerPlugin::ClientCommand, mfp_dest);
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SourceHook::GetFuncInfo(&IRandomThings::ClientCommand, mfp_src);
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assert(mfp_dest.isVirtual);
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assert(mfp_dest.thisptroffs == 0);
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assert(mfp_dest.vtbloffs == 0);
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assert(mfp_src.isVirtual);
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assert(mfp_src.thisptroffs == 0);
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assert(mfp_src.vtbloffs == 0);
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vtable_src = (void **)*(void **)&sample;
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SourceHook::SetMemAccess(&this_vtable[mfp_dest.vtblindex],
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sizeof(void*),
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SH_MEM_READ|SH_MEM_WRITE|SH_MEM_EXEC);
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this_vtable[mfp_dest.vtblindex] = vtable_src[mfp_src.vtblindex];
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}
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/* AS inserted ClientFullyConnect into vtable, so move entries up on older engines */
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if (mm_backend != MMBackend_AlienSwarm
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&& mm_backend != MMBackend_Portal2
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&& mm_backend != MMBackend_Blade
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&& mm_backend != MMBackend_Insurgency
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&& mm_backend != MMBackend_CSGO
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&& mm_backend != MMBackend_DOTA)
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{
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SourceHook::MemFuncInfo mfp_fconnect;
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mfp_fconnect.isVirtual = false;
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SourceHook::GetFuncInfo(&ServerPlugin::ClientFullyConnect, mfp_fconnect);
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assert(mfp_fconnect.isVirtual);
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assert(mfp_fconnect.thisptroffs == 0);
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assert(mfp_fconnect.vtbloffs == 0);
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/* Shifting ClientDisconnect through OnQueryCvarValueFinished up into slot for
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* ClientFullyConnect (8 entries)
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*/
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SourceHook::SetMemAccess(&this_vtable[mfp_fconnect.vtblindex],
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sizeof(void *) * 8,
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SH_MEM_READ|SH_MEM_WRITE|SH_MEM_EXEC);
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memmove(&this_vtable[mfp_fconnect.vtblindex],
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&this_vtable[mfp_fconnect.vtblindex + 1],
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sizeof(void *) * 8);
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}
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char error[255];
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if (gamedll_bridge == NULL)
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{
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if (!mm_LoadMetamodLibrary(mm_backend, error, sizeof(error)))
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{
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mm_LogFatal("Detected engine %d but could not load: %s", mm_backend, error);
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return false;
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}
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}
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typedef IVspBridge *(*GetVspBridge)();
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GetVspBridge get_bridge = (GetVspBridge)mm_GetProcAddress("GetVspBridge");
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if (get_bridge == NULL)
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{
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if (gamedll_bridge == NULL)
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{
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mm_UnloadMetamodLibrary();
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}
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mm_LogFatal("Detected engine %d but could not find GetVspBridge callback", mm_backend);
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return false;
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}
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vsp_bridge = get_bridge();
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vsp_bridge_info info;
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info.engineFactory = engineFactory;
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info.gsFactory = gsFactory;
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info.vsp_callbacks = (IServerPluginCallbacks*)this;
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info.vsp_version = vsp_version;
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strcpy(error, "Unknown error");
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if (!vsp_bridge->Load(&info, error, sizeof(error)))
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{
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vsp_bridge = NULL;
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if (gamedll_bridge == NULL)
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{
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mm_UnloadMetamodLibrary();
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}
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mm_LogFatal("Unknown error loading Metamod for engine %d: %s", mm_backend, error);
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return false;
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}
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return true;
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}
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virtual void Unload()
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{
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if (vsp_bridge == NULL)
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return;
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vsp_bridge->Unload();
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if (gamedll_bridge == NULL)
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{
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mm_UnloadMetamodLibrary();
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}
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}
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virtual void Pause()
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{
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}
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virtual void UnPause()
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{
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}
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virtual const char *GetPluginDescription()
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{
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if (vsp_bridge == NULL)
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return "Metamod:Source Loader Shim";
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return vsp_bridge->GetDescription();
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}
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virtual void LevelInit(char const *pMapName)
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{
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}
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virtual void ServerActivate(edict_t *pEdictList, int edictCount, int clientMax)
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{
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}
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virtual void GameFrame(bool simulating)
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{
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}
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virtual void LevelShutdown()
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{
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}
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virtual void ClientActive(edict_t *pEntity)
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{
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}
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virtual void ClientFullyConnect(edict_t *pEntity)
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{
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}
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virtual void ClientDisconnect(edict_t *pEntity)
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{
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}
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virtual void ClientPutInServer(edict_t *pEntity, char const *playername)
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{
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}
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virtual void SetCommandClient(int index)
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{
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}
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virtual void ClientSettingsChanged(edict_t *pEdict)
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{
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}
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virtual PLUGIN_RESULT ClientConnect(bool *bAllowConnect,
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edict_t *pEntity,
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const char *pszName,
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const char *pszAddress,
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char *reject,
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int maxrejectlen)
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{
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return PLUGIN_CONTINUE;
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}
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virtual PLUGIN_RESULT ClientCommand(edict_t *pEntity)
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{
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return PLUGIN_CONTINUE;
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}
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virtual PLUGIN_RESULT NetworkIDValidated(const char *pszUserName, const char *pszNetworkID)
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{
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return PLUGIN_CONTINUE;
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}
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virtual void OnQueryCvarValueFinished(QueryCvarCookie_t iCookie,
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edict_t *pPlayerEntity,
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EQueryCvarValueStatus eStatus,
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const char *pCvarName,
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const char *pCvarValue)
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{
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}
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void PrepForLoad(unsigned int version)
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{
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vsp_version = version;
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load_allowed = true;
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}
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};
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ServerPlugin mm_vsp_callbacks;
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void *mm_GetVspCallbacks(unsigned int version)
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{
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if (vsp_bridge != NULL)
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return NULL;
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/* Only support versions 1 or 2 right now */
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if (version > 2)
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return NULL;
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mm_vsp_callbacks.PrepForLoad(version);
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return &mm_vsp_callbacks;
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}
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