added CRC32 checking capability to gamedata files

--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%401313

core/GameConfigs.cpp

@@ -43,6 +43,7 @@
 #include "MemoryUtils.h"
 #include "LibrarySys.h"
 #include "HandleSys.h"
+#include "sm_crc32.h"
 
 #if defined PLATFORM_LINUX
 #include <dlfcn.h>
@@ -62,11 +63,15 @@ char g_GameDesc[256] = {'!', '\0'};
 #define PSTATE_GAMEDEFS_SUPPORTED		6
 #define PSTATE_GAMEDEFS_SIGNATURES		7
 #define PSTATE_GAMEDEFS_SIGNATURES_SIG	8
+#define PSTATE_GAMEDEFS_CRC				9
+#define PSTATE_GAMEDEFS_CRC_BINARY		10
 
 #if defined PLATFORM_WINDOWS
-#define PLATFORM_NAME	"windows"
+#define PLATFORM_NAME				"windows"
+#define PLATFORM_SERVER_BINARY		"server.dll"
 #elif defined PLATFORM_LINUX
-#define PLATFORM_NAME	"linux"
+#define PLATFORM_NAME				"linux"
+#define PLATFORM_SERVER_BINARY		"server_i486.so"
 #endif
 
 struct TempSigInfo
@@ -79,6 +84,8 @@ struct TempSigInfo
 	char sig[512];
 	char library[64];
 } s_TempSig;
+unsigned int s_ServerBinCRC;
+bool s_ServerBinCRC_Ok = false;
 
 CGameConfig::CGameConfig(const char *file)
 {
@@ -128,6 +135,7 @@ SMCParseResult CGameConfig::ReadSMC_NewSection(const char *name, bool opt_quotes
 				|| (strcasecmp(name, g_Game) == 0)
 				|| (strcasecmp(name, g_GameDesc) == 0))
 			{
+				bShouldBeReadingDefault = true;
 				m_ParseState = PSTATE_GAMEDEFS;
 				strncopy(m_Game, name, sizeof(m_Game));
 			} else {
@@ -156,6 +164,11 @@ SMCParseResult CGameConfig::ReadSMC_NewSection(const char *name, bool opt_quotes
 			{
 				m_ParseState = PSTATE_GAMEDEFS_SIGNATURES;
 			}
+			else if (strcmp(name, "CRC") == 0)
+			{
+				m_ParseState = PSTATE_GAMEDEFS_CRC;
+				bShouldBeReadingDefault = false;
+			}
 			else
 			{
 				m_IgnoreLevel++;
@@ -177,11 +190,54 @@ SMCParseResult CGameConfig::ReadSMC_NewSection(const char *name, bool opt_quotes
 			m_ParseState = PSTATE_GAMEDEFS_SIGNATURES_SIG;
 			break;
 		}
+	case PSTATE_GAMEDEFS_CRC:
+		{
+			char error[255];
+			error[0] = '\0';
+			if (strcmp(name, "server") != 0)
+			{
+				UTIL_Format(error, sizeof(error), "Unrecognized library \"%s\"", name);
+			} 
+			else if (!s_ServerBinCRC_Ok)
+			{
+				FILE *fp;
+				char path[PLATFORM_MAX_PATH];
+
+				g_SourceMod.BuildPath(Path_Game, path, sizeof(path), "bin/" PLATFORM_SERVER_BINARY);
+				if ((fp = fopen(path, "rb")) == NULL)
+				{
+					UTIL_Format(error, sizeof(error), "Could not open binary: %s", path);
+				} else {
+					size_t size;
+					void *buffer;
+
+					fseek(fp, 0, SEEK_END);
+					size = ftell(fp);
+					fseek(fp, 0, SEEK_SET);
+
+					buffer = malloc(size);
+					fread(buffer, size, 1, fp);
+					s_ServerBinCRC = UTIL_CRC32(buffer, size);
+					free(buffer);
+					s_ServerBinCRC_Ok = true;
+				}
+			}
+			if (error[0] != '\0')
+			{
+				m_IgnoreLevel = 1;
+				g_Logger.LogError("[SM] Error while parsing CRC section for \"%s\" (%s):", m_Game, m_pFile);
+				g_Logger.LogError("[SM] %s", error);
+			} else {
+				m_ParseState = PSTATE_GAMEDEFS_CRC_BINARY;
+			}
+			break;
+		}
 	/* No sub-sections allowed:
 	 case PSTATE_GAMEDEFS_OFFSETS_OFFSET:
 	 case PSTATE_GAMEDEFS_KEYS:
 	 case PSTATE_GAMEDEFS_SUPPORTED:
 	 case PSTATE_GAMEDEFS_SIGNATURES_SIG:
+	 case PSTATE_GAMEDEFS_CRC_BINARY:
 	 */
 	default:
 		{
@@ -228,6 +284,18 @@ SMCParseResult CGameConfig::ReadSMC_KeyValue(const char *key, const char *value,
 		} else if (strcmp(key, "library") == 0) {
 			strncopy(s_TempSig.library, value, sizeof(s_TempSig.library));
 		}
+	} else if (m_ParseState == PSTATE_GAMEDEFS_CRC_BINARY) {
+		if (strcmp(key, PLATFORM_NAME) == 0 
+			&& s_ServerBinCRC_Ok
+			&& !bShouldBeReadingDefault)
+		{
+			unsigned int crc = 0;
+			sscanf(value, "%08X", &crc);
+			if (s_ServerBinCRC == crc)
+			{
+				bShouldBeReadingDefault = true;
+			}
+		}
 	}
 
 	return SMCParse_Continue;
@@ -287,6 +355,7 @@ SMCParseResult CGameConfig::ReadSMC_LeavingSection()
 			m_ParseState = PSTATE_GAMEDEFS_OFFSETS;
 			break;
 		}
+	case PSTATE_GAMEDEFS_CRC:
 	case PSTATE_GAMEDEFS_SUPPORTED:
 		{
 			if (!bShouldBeReadingDefault)
@@ -299,6 +368,11 @@ SMCParseResult CGameConfig::ReadSMC_LeavingSection()
 			}
 			break;
 		}
+	case PSTATE_GAMEDEFS_CRC_BINARY:
+		{
+			m_ParseState = PSTATE_GAMEDEFS_CRC;
+			break;
+		}
 	case PSTATE_GAMEDEFS_SIGNATURES:
 		{
 			m_ParseState = PSTATE_GAMEDEFS;

core/Makefile

@@ -24,7 +24,7 @@ OBJECTS = AdminCache.cpp CDataPack.cpp ConCmdManager.cpp ConVarManager.cpp CoreC
 	MemoryUtils.cpp PlayerManager.cpp TextParsers.cpp TimerSys.cpp Translator.cpp UserMessages.cpp \
 	sm_autonatives.cpp sm_memtable.cpp sm_srvcmds.cpp sm_stringutil.cpp sm_trie.cpp \
 	sourcemm_api.cpp sourcemod.cpp MenuStyle_Base.cpp MenuStyle_Valve.cpp MenuManager.cpp \
-	MenuStyle_Radio.cpp ChatTriggers.cpp ADTFactory.cpp MenuVoting.cpp
+	MenuStyle_Radio.cpp ChatTriggers.cpp ADTFactory.cpp MenuVoting.cpp sm_crc32.cpp
 OBJECTS += smn_admin.cpp smn_bitbuffer.cpp smn_console.cpp smn_core.cpp \
 	smn_datapacks.cpp smn_entities.cpp smn_events.cpp smn_fakenatives.cpp \
 	smn_filesystem.cpp smn_float.cpp smn_functions.cpp smn_gameconfigs.cpp smn_halflife.cpp smn_handles.cpp smn_keyvalues.cpp \

core/sm_crc32.cpp

@@ -0,0 +1,65 @@
+#include "sm_crc32.h"
+
+/**
+ * Polynomial: 0x04C11DB7
+ */
+const unsigned int CRCTable[256] = {
+  0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
+  0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
+  0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
+  0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
+  0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
+  0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
+  0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
+  0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
+  0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
+  0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+  0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
+  0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
+  0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
+  0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
+  0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
+  0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
+  0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
+  0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
+  0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
+  0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+  0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
+  0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
+  0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
+  0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
+  0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
+  0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
+  0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
+  0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
+  0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
+  0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+  0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
+  0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
+  0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
+  0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
+  0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
+  0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
+  0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
+  0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
+  0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
+  0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+  0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
+  0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
+  0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d};
+
+unsigned int UTIL_CRC32(const void *pdata, size_t data_length)
+{
+	unsigned char *data = (unsigned char *)pdata;
+	unsigned int crc = 0xFFFFFFFF;
+	unsigned char c;
+
+	for (size_t i=0; i<data_length; i++, data++)
+	{
+		c = (unsigned char)((crc ^ *data) & 0xFF);
+		crc = CRCTable[c] ^ (crc >> 8);
+	}
+
+	return crc;
+}
+

core/sm_crc32.h

@@ -0,0 +1,41 @@
+/**
+ * vim: set ts=4 :
+ * ================================================================
+ * SourceMod
+ * Copyright (C) 2004-2007 AlliedModders LLC.  All rights reserved.
+ * ================================================================
+ *
+ * This program is free software; you can redistribute it and/or 
+ * modify it under the terms of the GNU General Public License, 
+ * version 3.0, as published by the Free Software Foundation.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * As a special exception, AlliedModders LLC gives you permission to 
+ * link the code of this program (as well as its derivative works) to 
+ * "Half-Life 2," the "Source Engine," the "SourcePawn JIT," and any 
+ * Game MODs that run on software by the Valve Corporation.  You must 
+ * obey the GNU General Public License in all respects for all other 
+ * code used. Additionally, AlliedModders LLC grants this exception 
+ * to all derivative works. AlliedModders LLC defines further 
+ * exceptions, found in LICENSE.txt (as of this writing, version 
+ * JULY-31-2007), or <http://www.sourcemod.net/license.php>.
+ *
+ * Version: $Id: AdminCache.cpp 1311 2007-08-11 18:03:55Z dvander $
+ */
+
+#ifndef _INCLUDE_SOURCEMOD_CRC32_H_
+#define _INCLUDE_SOURCEMOD_CRC32_H_
+
+#include <stddef.h>
+
+unsigned int UTIL_CRC32(const void *data, size_t data_length);
+
+#endif //_INCLUDE_SOURCEMOD_CRC32_H_
+