/**
* vim: set ts=4 sw=4 tw=99 noet :
* ======================================================
* Metamod:Source
* Copyright (C) 2004-2023 AlliedModders LLC and authors.
* All rights reserved.
* ======================================================
*
* This software is provided 'as-is', without any express or implied warranty.
* In no event will the authors be held liable for any damages arising from
* the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software in a
* product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#include <time.h>
#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <cstdint>
#include "loader.h"
#include "serverplugin.h"
#include "gamedll.h"
#include "utility.h"
#if defined __APPLE__
#include <crt_externs.h>
#endif
static HMODULE mm_library = NULL;
static char mm_fatal_logfile[PLATFORM_MAX_PATH] = "metamod-fatal.log";
MetamodBackend mm_backend = MMBackend_UNKNOWN;
extern void
mm_LogFatal(const char *message, ...)
{
FILE *fp;
time_t t;
va_list ap;
char header[256];
printf("MMS: Fatal error: ");
va_start(ap, message);
vprintf(message, ap);
va_end(ap);
printf("\n");
fp = fopen(mm_fatal_logfile, "at");
if (!fp && (fp = fopen("metamod-fatal.log", "at")) == NULL)
return;
t = time(NULL);
strftime(header, sizeof(header), "%m/%d/%Y - %H:%M:%S", localtime(&t));
fprintf(fp, "L %s: ", header);
va_start(ap, message);
vfprintf(fp, message, ap);
va_end(ap);
fprintf(fp, "\n");
fclose(fp);
}
static const char *backend_names[] =
{
"2.ep1",
"2.darkm",
"2.ep2",
"2.bgt",
"2.eye",
"2.css",
"2.ep2v",
"2.l4d",
"2.l4d2",
"2.swarm",
"2.portal2",
"2.csgo",
"2.dota",
"2.hl2dm",
"2.dods",
"2.tf2",
"2.nd",
"2.sdk2013",
"2.blade",
"2.insurgency",
"2.contagion",
"2.bms",
"2.doi",
"2.mock",
"2.pvkii",
"2.mcv",
"2.cs2",
};
#if defined _WIN32
#define LIBRARY_EXT ".dll"
#define LIBRARY_MINEXT ".dll"
#elif defined __APPLE__
#define LIBRARY_EXT ".dylib"
#define LIBRARY_MINEXT ".dylib"
#elif defined __linux__
#define LIBRARY_EXT LIB_SUFFIX
#define LIBRARY_MINEXT ".so"
#endif
bool
mm_LoadMetamodLibrary(MetamodBackend backend, char *buffer, size_t maxlength)
{
size_t len, temp_len;
char mm_path[PLATFORM_MAX_PATH * 2];
/* Get our path */
if (!mm_GetFileOfAddress((void*)mm_GetFileOfAddress, mm_path, sizeof(mm_path)))
return false;
len = strlen(mm_path);
const char *pLastSlash = strrchr(mm_path, PATH_SEP_CHAR);
if (!pLastSlash)
return false;
temp_len = strlen(&pLastSlash[1]);
if (len < temp_len)
return false;
/* Build log file name */
mm_path[len - temp_len] = '\0';
mm_Format(mm_fatal_logfile,
sizeof(mm_fatal_logfile),
"%smetamod-fatal.log",
mm_path);
/* Replace server.dll with the new binary we want */
mm_Format(&mm_path[len - temp_len],
sizeof(mm_path) - (len - temp_len),
"metamod.%s" LIBRARY_MINEXT,
backend_names[backend]);
mm_library = (HMODULE)mm_LoadLibrary(mm_path, buffer, maxlength);
return (mm_library != NULL);
}
void
mm_UnloadMetamodLibrary()
{
mm_UnloadLibrary(mm_library);
mm_library = NULL;
}
#if defined _WIN32
#define EXPORT extern "C" __declspec(dllexport)
#elif defined __GNUC__
#define EXPORT extern "C" __attribute__ ((visibility("default")))
#endif
EXPORT void *
CreateInterface(const char *name, int *ret)
{
/* If we've got a VSP bridge, do nothing. */
if (vsp_bridge != NULL)
{
if (ret != NULL)
*ret = 1;
return NULL;
}
void *ptr;
if (strncmp(name, "ISERVERPLUGINCALLBACKS", 22) == 0)
{
/* Either load as VSP or start VSP listener */
ptr = mm_GetVspCallbacks(atoi(&name[22]));
}
else if (gamedll_bridge == NULL)
{
/* Load as gamedll */
ptr = mm_GameDllRequest(name, ret);
}
else
{
/* If we've got a gamedll bridge, forward the request. */
return gamedll_bridge->QueryInterface(name, ret);
}
if (ret != NULL)
*ret = (ptr != NULL) ? 0 : 1;
return ptr;
}
void *
mm_GetProcAddress(const char *name)
{
return mm_GetLibAddress(mm_library, name);
}
typedef const char *(*GetGameInfoStringFn)(const char *pszKeyName, const char *pszDefaultValue, char *pszOut, uint64_t cbOut);
void
mm_GetGameName(char *buffer, size_t size)
{
if (!mm_GetCommandArgument("-game", buffer, size))
{
char tier0_path[PLATFORM_MAX_PATH];
#ifdef _WIN32
if (mm_ResolvePath("tier0.dll", tier0_path, sizeof(tier0_path), false))
#elif defined __linux__
if (mm_ResolvePath("libtier0.so", tier0_path, sizeof(tier0_path), false))
#elif defined __APPLE__
if (mm_ResolvePath("libtier0.dylib", tier0_path, sizeof(tier0_path), false))
#else
#error unsupported platform
#endif
{
char err[1024];
void* pTier0 = mm_LoadLibrary(tier0_path, err, sizeof(err));
if (pTier0)
{
#ifdef _WIN32
GetGameInfoStringFn func = (GetGameInfoStringFn)mm_GetLibAddress(pTier0, "?GetGameInfoString@@YAPEBDPEBD0PEAD_K@Z");
#else
GetGameInfoStringFn func = (GetGameInfoStringFn)mm_GetLibAddress(pTier0, "_Z17GetGameInfoStringPKcS0_Pcm");
#endif
if (func != nullptr)
{
static char szTmp[260];
strncpy(buffer, func("FileSystem/SearchPaths/Mod", "", szTmp, sizeof(szTmp)), size);
}
else
{
mm_LogFatal("Failed to resolve GetGameInfoString in fallback gamedir lookup.");
}
mm_UnloadLibrary(pTier0);
}
else
{
mm_LogFatal("Failed to load tier0 from \"%s\" in fallback gamedir lookup: %s", tier0_path, err);
}
}
else
{
mm_LogFatal("Failed to resolve tier0 path in fallback gamedir lookup.");
}
}
if (buffer[0] == 0)
{
strncpy(buffer, ".", size);
}
}
MetamodBackend
mm_DetermineBackendS1(QueryValveInterface engineFactory, QueryValveInterface serverFactory, const char *game_name)
{
if (engineFactory("VEngineServer023", NULL) != NULL)
{
if (engineFactory("EngineTraceServer004", NULL) == NULL)
{
goto TF2branch;
}
if (engineFactory("IEngineSoundServer004", NULL) != NULL)
{
void *lib = (void *)serverFactory;
void *addr;
if (strcmp(game_name, "doi") == 0
|| (addr = mm_FindPattern(lib, "doi_gamerules_data", sizeof("doi_gamerules_data") - 1)))
{
return MMBackend_DOI;
}
return MMBackend_Insurgency;
}
if (serverFactory("ServerGameDLL010", NULL) != NULL)
{
return MMBackend_BMS;
}
if (mm_FindPattern((void *)engineFactory, " Blade Symphony ", sizeof(" Blade Symphony ") - 1))
{
return MMBackend_Blade;
}
if (mm_FindPattern((void *)engineFactory, "Military Conflict: Vietnam", sizeof("Military Conflict: Vietnam") - 1))
{
return MMBackend_MCV;
}
return MMBackend_CSGO;
}
else if (engineFactory("VEngineServer022", NULL) != NULL &&
engineFactory("VEngineCvar007", NULL) != NULL)
{
if (engineFactory("EngineTraceServer004", NULL) != NULL)
{
if (engineFactory("XboxSystemInterface001", NULL) != NULL)
{
return MMBackend_AlienSwarm;
}
void *lib = (void *)serverFactory;
void *addr;
if (strcmp(game_name, "portal2") == 0
|| (addr = mm_FindPattern(lib, "baseportalcombatweapon", sizeof("baseportalcombatweapon") - 1)))
{
return MMBackend_Portal2;
}
return MMBackend_Blade; // Old Blade
}
else if (engineFactory("VPrecacheSystem001", NULL) != NULL)
{
if (serverFactory("ServerGameTags002", NULL) != NULL)
{
return MMBackend_NuclearDawn;
}
else
{
void *lib = (void *)serverFactory;
void *addr;
if (strcmp(game_name, "contagion") == 0
|| (addr = mm_FindPattern(lib, "Contagion_Chat_All", sizeof("Contagion_Chat_All") - 1)))
{
return MMBackend_Contagion;
}
else
{
return MMBackend_Left4Dead2;
}
}
}
return MMBackend_Left4Dead;
}
else if (engineFactory("VEngineServer021", NULL) != NULL)
{
/* Check for OB */
if (engineFactory("VEngineCvar004", NULL) != NULL)
{
if (engineFactory("VModelInfoServer002", NULL) != NULL)
{
/* BGT has same iface version numbers and libs as ep2 */
void *lib = (void *)serverFactory;
void *addr;
if (strcmp(game_name, "pm") == 0
|| (addr = mm_FindPattern(lib, "DT_PMPlayerResource", sizeof("DT_PMPlayerResource") - 1)))
{
return MMBackend_BloodyGoodTime;
}
else
{
return MMBackend_Episode2;
}
}
else if (engineFactory("VModelInfoServer003", NULL) != NULL)
{
if (engineFactory("VFileSystem017", NULL) != NULL)
{
return MMBackend_EYE;
}
else
{
TF2branch:
void *lib = (void *)serverFactory;
void *addr;
if (strcmp(game_name, "cstrike") == 0
|| (addr = mm_FindPattern(lib, "DT_CSPlayerResource", sizeof("DT_CSPlayerResource") - 1)))
{
return MMBackend_CSS;
}
else if (strcmp(game_name, "tf") == 0
|| (addr = mm_FindPattern(lib, "DT_TFPlayerResource", sizeof("DT_TFPlayerResource") - 1)))
{
return MMBackend_TF2;
}
else if (strcmp(game_name, "dod") == 0
|| (addr = mm_FindPattern(lib, "DT_DODPlayerResource", sizeof("DT_DODPlayerResource") - 1)))
{
return MMBackend_DODS;
}
else if (strcmp(game_name, "hl2mp") == 0)
{
return MMBackend_HL2DM;
}
else if (strcmp(game_name, "pvkii") == 0)
{
return MMBackend_PVKII;
}
else if (strcmp(game_name, ".") == 0 && engineFactory("MOCK_ENGINE", NULL))
{
return MMBackend_Mock;
}
else
{
return MMBackend_SDK2013;
}
}
}
}
/* Check for Episode One/Old Engine */
else if (engineFactory("VModelInfoServer001", NULL) != NULL &&
(engineFactory("VEngineCvar003", NULL) != NULL ||
engineFactory("VEngineCvar002", NULL) != NULL))
{
/* Check for Dark Messiah which has a weird directory structure */
if (strcmp(game_name, ".") == 0)
{
return MMBackend_DarkMessiah;
}
return MMBackend_Episode1;
}
}
return MMBackend_UNKNOWN;
}