382 lines
8.8 KiB
C++
382 lines
8.8 KiB
C++
/**
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* vim: set ts=4 :
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* =============================================================================
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* SourceMod SDKTools Extension
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* Copyright (C) 2004-2008 AlliedModders LLC. All rights reserved.
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* =============================================================================
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License, version 3.0, as published by the
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* Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* As a special exception, AlliedModders LLC gives you permission to link the
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* code of this program (as well as its derivative works) to "Half-Life 2," the
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* "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
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* by the Valve Corporation. You must obey the GNU General Public License in
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* all respects for all other code used. Additionally, AlliedModders LLC grants
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* this exception to all derivative works. AlliedModders LLC defines further
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* exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
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* or <http://www.sourcemod.net/license.php>.
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*
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* Version: $Id$
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*/
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#include "extension.h"
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#include "vhelpers.h"
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static void *s_pGameRules = nullptr;
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static void **g_ppGameRules = nullptr;
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void *g_EntList = nullptr;
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CBaseHandle g_ResourceEntity;
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void *GameRules()
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{
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return g_ppGameRules ? *g_ppGameRules : s_pGameRules;
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}
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void InitializeValveGlobals()
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{
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g_EntList = gamehelpers->GetGlobalEntityList();
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/*
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* g_pGameRules
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*
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* First try to lookup pointer directly for platforms with symbols.
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* If symbols aren't present (Windows or stripped Linux/Mac),
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* attempt find via CreateGameRulesObject + offset
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*/
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char *addr;
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if (g_pGameConf->GetMemSig("g_pGameRules", (void **)&addr) && addr)
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{
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g_ppGameRules = reinterpret_cast<void **>(addr);
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}
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else if (g_pGameConf->GetMemSig("CreateGameRulesObject", (void **)&addr) && addr)
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{
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int offset;
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if (!g_pGameConf->GetOffset("g_pGameRules", &offset) || !offset)
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{
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return;
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}
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g_ppGameRules = *reinterpret_cast<void ***>(addr + offset);
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}
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}
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static bool UTIL_FindDataTable(SendTable *pTable,
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const char *name,
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sm_sendprop_info_t *info,
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unsigned int offset = 0)
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{
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const char *pname;
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int props = pTable->GetNumProps();
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SendProp *prop;
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SendTable *table;
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for (int i = 0; i<props; i++)
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{
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prop = pTable->GetProp(i);
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if ((table = prop->GetDataTable()) != NULL)
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{
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pname = prop->GetName();
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if (pname && strcmp(name, pname) == 0)
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{
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info->prop = prop;
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info->actual_offset = offset + info->prop->GetOffset();
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return true;
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}
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if (UTIL_FindDataTable(table,
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name,
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info,
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offset + prop->GetOffset())
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)
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{
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return true;
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}
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}
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}
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return false;
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}
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static ServerClass *UTIL_FindServerClass(const char *classname)
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{
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ServerClass *sc = gamedll->GetAllServerClasses();
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while (sc)
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{
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if (strcmp(classname, sc->GetName()) == 0)
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{
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return sc;
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}
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sc = sc->m_pNext;
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}
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return nullptr;
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}
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void UpdateValveGlobals()
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{
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s_pGameRules = nullptr;
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const char *pszNetClass = g_pGameConf->GetKeyValue("GameRulesProxy");
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const char *pszDTName = g_pGameConf->GetKeyValue("GameRulesDataTable");
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if (pszNetClass && pszDTName)
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{
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sm_sendprop_info_t info;
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ServerClass *sc = UTIL_FindServerClass(pszNetClass);
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if (sc && UTIL_FindDataTable(sc->m_pTable, pszDTName, &info))
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{
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auto proxyFn = info.prop->GetDataTableProxyFn();
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if (proxyFn)
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{
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CSendProxyRecipients recp;
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s_pGameRules = proxyFn(nullptr, nullptr, nullptr, &recp, 0);
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}
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}
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}
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}
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size_t UTIL_StringToSignature(const char *str, char buffer[], size_t maxlength)
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{
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size_t real_bytes = 0;
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size_t length = strlen(str);
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for (size_t i=0; i<length; i++)
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{
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if (real_bytes >= maxlength)
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{
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break;
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}
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buffer[real_bytes++] = (unsigned char)str[i];
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if (str[i] == '\\'
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&& str[i+1] == 'x')
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{
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if (i + 3 >= length)
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{
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continue;
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}
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/* Get the hex part */
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char s_byte[3];
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int r_byte;
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s_byte[0] = str[i+2];
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s_byte[1] = str[i+3];
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s_byte[2] = '\n';
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/* Read it as an integer */
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sscanf(s_byte, "%x", &r_byte);
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/* Save the value */
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buffer[real_bytes-1] = (unsigned char)r_byte;
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/* Adjust index */
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i += 3;
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}
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}
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return real_bytes;
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}
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bool UTIL_VerifySignature(const void *addr, const char *sig, size_t len)
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{
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unsigned char *addr1 = (unsigned char *) addr;
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unsigned char *addr2 = (unsigned char *) sig;
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for (size_t i = 0; i < len; i++)
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{
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if (addr2[i] == '*')
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continue;
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if (addr1[i] != addr2[i])
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return false;
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}
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return true;
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}
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#if defined PLATFORM_WINDOWS
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#define FAKECLIENT_KEY "CreateFakeClient_Windows"
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#elif defined PLATFORM_LINUX
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#define FAKECLIENT_KEY "CreateFakeClient_Linux"
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#elif defined PLATFORM_APPLE
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#define FAKECLIENT_KEY "CreateFakeClient_Mac"
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#else
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#error "Unsupported platform"
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#endif
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void GetIServer()
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{
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#if SOURCE_ENGINE == SE_TF2 \
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|| SOURCE_ENGINE == SE_DODS \
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|| SOURCE_ENGINE == SE_HL2DM \
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|| SOURCE_ENGINE == SE_CSS \
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|| SOURCE_ENGINE == SE_SDK2013 \
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|| SOURCE_ENGINE == SE_INSURGENCY
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#if SOURCE_ENGINE != SE_INSURGENCY
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if (g_SMAPI->GetEngineFactory(false)("VEngineServer022", nullptr))
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#endif // !SE_INSURGENCY
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{
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iserver = engine->GetIServer();
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return;
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}
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#endif
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void *addr;
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const char *sigstr;
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char sig[32];
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size_t siglen;
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int offset;
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void *vfunc = NULL;
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/* Use the symbol if it exists */
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if (g_pGameConf->GetMemSig("sv", &addr) && addr)
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{
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iserver = reinterpret_cast<IServer *>(addr);
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return;
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}
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#if defined METAMOD_PLAPI_VERSION || PLAPI_VERSION >= 11
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/* Get the CreateFakeClient function pointer */
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if (!(vfunc=SH_GET_ORIG_VFNPTR_ENTRY(engine, &IVEngineServer::CreateFakeClient)))
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{
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return;
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}
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#else
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/* Get the interface manually */
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SourceHook::MemFuncInfo info = {true, -1, 0, 0};
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SourceHook::GetFuncInfo(&IVEngineServer::CreateFakeClient, info);
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vfunc = enginePatch->GetOrigFunc(info.vtbloffs, info.vtblindex);
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if (!vfunc)
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{
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void **vtable = *reinterpret_cast<void ***>(enginePatch->GetThisPtr() + info.thisptroffs + info.vtbloffs);
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vfunc = vtable[info.vtblindex];
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}
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#endif
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/* Get signature string for IVEngineServer::CreateFakeClient() */
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sigstr = g_pGameConf->GetKeyValue(FAKECLIENT_KEY);
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if (!sigstr)
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{
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return;
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}
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/* Convert signature string to signature bytes */
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siglen = UTIL_StringToSignature(sigstr, sig, sizeof(sig));
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/* Check if we're on the expected function */
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if (!UTIL_VerifySignature(vfunc, sig, siglen))
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{
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return;
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}
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/* Get the offset into CreateFakeClient */
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if (!g_pGameConf->GetOffset("sv", &offset))
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{
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return;
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}
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/* Finally we have the interface we were looking for */
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iserver = *reinterpret_cast<IServer **>(reinterpret_cast<unsigned char *>(vfunc) + offset);
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}
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void GetResourceEntity()
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{
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g_ResourceEntity.Term();
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#if SOURCE_ENGINE >= SE_ORANGEBOX
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const char *classname = g_pGameConf->GetKeyValue("ResourceEntityClassname");
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if (classname != NULL)
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{
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for (CBaseEntity *pEntity = (CBaseEntity *)servertools->FirstEntity(); pEntity; pEntity = (CBaseEntity *)servertools->NextEntity(pEntity))
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{
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if (!strcmp(gamehelpers->GetEntityClassname(pEntity), classname))
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{
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g_ResourceEntity = ((IHandleEntity *)pEntity)->GetRefEHandle();
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break;
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}
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}
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}
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else
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#endif
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{
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int edictCount = gpGlobals->maxEntities;
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for (int i=0; i<edictCount; i++)
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{
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edict_t *pEdict = PEntityOfEntIndex(i);
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if (!pEdict || pEdict->IsFree())
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{
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continue;
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}
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if (!pEdict->GetNetworkable())
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{
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continue;
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}
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IHandleEntity *pHandleEnt = pEdict->GetNetworkable()->GetEntityHandle();
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if (!pHandleEnt)
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{
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continue;
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}
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ServerClass *pClass = pEdict->GetNetworkable()->GetServerClass();
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if (FindNestedDataTable(pClass->m_pTable, "DT_PlayerResource"))
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{
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g_ResourceEntity = pHandleEnt->GetRefEHandle();
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break;
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}
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}
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}
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}
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const char *GetDTTypeName(int type)
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{
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switch (type)
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{
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case DPT_Int:
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{
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return "integer";
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}
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case DPT_Float:
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{
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return "float";
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}
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case DPT_Vector:
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{
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return "vector";
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}
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case DPT_String:
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{
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return "string";
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}
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case DPT_Array:
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{
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return "array";
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}
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case DPT_DataTable:
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{
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return "datatable";
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}
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#if SOURCE_ENGINE >= SE_ALIENSWARM
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case DPT_Int64:
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{
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return "int64";
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}
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#endif
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default:
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{
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return NULL;
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}
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}
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return NULL;
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}
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