src/game/AddonHandler.cpp

   1 /*
   2  * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include "AddonHandler.h"
  20 #include "Database/DatabaseEnv.h"
  21 #include "Opcodes.h"
  22 #include "Log.h"
  23 #include "Policies/SingletonImp.h"
  24 #include "zlib/zlib.h"
  25
  26 INSTANTIATE_SINGLETON_1( AddonHandler );
  27
  28 AddonHandler::AddonHandler()
  29 {
  30 }
  31
  32 AddonHandler::~AddonHandler()
  33 {
  34 }
  35
  36 bool AddonHandler::BuildAddonPacket(WorldPacket *Source, WorldPacket *Target)
  37 {
  38     ByteBuffer AddOnPacked;
  39     uLongf AddonRealSize;
  40     uint32 CurrentPosition;
  41     uint32 TempValue;
  42
  43     unsigned char tdata[256] =
  44     {
  45         0xC3, 0x5B, 0x50, 0x84, 0xB9, 0x3E, 0x32, 0x42, 0x8C, 0xD0, 0xC7, 0x48, 0xFA, 0x0E, 0x5D, 0x54,
  46         0x5A, 0xA3, 0x0E, 0x14, 0xBA, 0x9E, 0x0D, 0xB9, 0x5D, 0x8B, 0xEE, 0xB6, 0x84, 0x93, 0x45, 0x75,
  47         0xFF, 0x31, 0xFE, 0x2F, 0x64, 0x3F, 0x3D, 0x6D, 0x07, 0xD9, 0x44, 0x9B, 0x40, 0x85, 0x59, 0x34,
  48         0x4E, 0x10, 0xE1, 0xE7, 0x43, 0x69, 0xEF, 0x7C, 0x16, 0xFC, 0xB4, 0xED, 0x1B, 0x95, 0x28, 0xA8,
  49         0x23, 0x76, 0x51, 0x31, 0x57, 0x30, 0x2B, 0x79, 0x08, 0x50, 0x10, 0x1C, 0x4A, 0x1A, 0x2C, 0xC8,
  50         0x8B, 0x8F, 0x05, 0x2D, 0x22, 0x3D, 0xDB, 0x5A, 0x24, 0x7A, 0x0F, 0x13, 0x50, 0x37, 0x8F, 0x5A,
  51         0xCC, 0x9E, 0x04, 0x44, 0x0E, 0x87, 0x01, 0xD4, 0xA3, 0x15, 0x94, 0x16, 0x34, 0xC6, 0xC2, 0xC3,
  52         0xFB, 0x49, 0xFE, 0xE1, 0xF9, 0xDA, 0x8C, 0x50, 0x3C, 0xBE, 0x2C, 0xBB, 0x57, 0xED, 0x46, 0xB9,
  53         0xAD, 0x8B, 0xC6, 0xDF, 0x0E, 0xD6, 0x0F, 0xBE, 0x80, 0xB3, 0x8B, 0x1E, 0x77, 0xCF, 0xAD, 0x22,
  54         0xCF, 0xB7, 0x4B, 0xCF, 0xFB, 0xF0, 0x6B, 0x11, 0x45, 0x2D, 0x7A, 0x81, 0x18, 0xF2, 0x92, 0x7E,
  55         0x98, 0x56, 0x5D, 0x5E, 0x69, 0x72, 0x0A, 0x0D, 0x03, 0x0A, 0x85, 0xA2, 0x85, 0x9C, 0xCB, 0xFB,
  56         0x56, 0x6E, 0x8F, 0x44, 0xBB, 0x8F, 0x02, 0x22, 0x68, 0x63, 0x97, 0xBC, 0x85, 0xBA, 0xA8, 0xF7,
  57         0xB5, 0x40, 0x68, 0x3C, 0x77, 0x86, 0x6F, 0x4B, 0xD7, 0x88, 0xCA, 0x8A, 0xD7, 0xCE, 0x36, 0xF0,
  58         0x45, 0x6E, 0xD5, 0x64, 0x79, 0x0F, 0x17, 0xFC, 0x64, 0xDD, 0x10, 0x6F, 0xF3, 0xF5, 0xE0, 0xA6,
  59         0xC3, 0xFB, 0x1B, 0x8C, 0x29, 0xEF, 0x8E, 0xE5, 0x34, 0xCB, 0xD1, 0x2A, 0xCE, 0x79, 0xC3, 0x9A,
  60         0x0D, 0x36, 0xEA, 0x01, 0xE0, 0xAA, 0x91, 0x20, 0x54, 0xF0, 0x72, 0xD8, 0x1E, 0xC7, 0x89, 0xD2
  61     };
  62
  63     // broken addon packet, can't be received from real client
  64     if (Source->rpos() + 4 > Source->size())
  65         return false;
  66
  67     *Source >> TempValue;                                   // get real size of the packed structure
  68
  69     // empty addon packet, nothing process, can't be received from real client
  70     if(!TempValue)
  71         return false;
  72
  73     AddonRealSize = TempValue;                              // temp value because ZLIB only excepts uLongf
  74
  75     CurrentPosition = Source->rpos();                       // get the position of the pointer in the structure
  76
  77     AddOnPacked.resize(AddonRealSize);                      // resize target for zlib action
  78
  79     if (!uncompress(const_cast<uint8*>(AddOnPacked.contents()), &AddonRealSize, const_cast<uint8*>((*Source).contents() + CurrentPosition), (*Source).size() - CurrentPosition)!= Z_OK)
  80     {
  81         Target->Initialize(SMSG_ADDON_INFO);
  82
  83         uint32 addonsCount;
  84         AddOnPacked >> addonsCount;                         // addons count?
  85
  86         for(uint32 i = 0; i < addonsCount; ++i)
  87         {
  88             std::string addonName;
  89             uint8 enabled;
  90             uint32 crc, unk2;
  91
  92             // check next addon data format correctness
  93             if(AddOnPacked.rpos()+1 > AddOnPacked.size())
  94                 return false;
  95
  96             AddOnPacked >> addonName;
  97
  98             // recheck next addon data format correctness
  99             if(AddOnPacked.rpos()+1+4+4 > AddOnPacked.size())
 100                 return false;
 101
 102             AddOnPacked >> enabled >> crc >> unk2;
 103
 104             sLog.outDebug("ADDON: Name: %s, Enabled: 0x%x, CRC: 0x%x, Unknown2: 0x%x", addonName.c_str(), enabled, crc, unk2);
 105
 106             uint8 state = (enabled ? 2 : 1);
 107             *Target << uint8(state);
 108
 109             uint8 unk1 = (enabled ? 1 : 0);
 110             *Target << uint8(unk1);
 111             if (unk1)
 112             {
 113                 uint8 unk2 = (crc != 0x4c1c776d);           // If addon is Standard addon CRC
 114                 *Target << uint8(unk2);
 115                 if (unk2)
 116                     Target->append(tdata, sizeof(tdata));
 117
 118                 *Target << uint32(0);
 119             }
 120
 121             uint8 unk3 = (enabled ? 0 : 1);
 122             *Target << uint8(unk3);
 123             if (unk3)
 124             {
 125                 // String, 256 (null terminated?)
 126                 *Target << uint8(0);
 127             }
 128         }
 129
 130         uint32 unk4;
 131         AddOnPacked >> unk4;
 132
 133         uint32 count = 0;
 134         *Target << uint32(count);
 135         /*for(uint32 i = 0; i < count; ++i)
 136         {
 137             uint32
 138             string (16 bytes)
 139             string (16 bytes)
 140             uint32
 141         }*/
 142
 143         if(AddOnPacked.rpos() != AddOnPacked.size())
 144             sLog.outDebug("packet under read!");
 145     }
 146     else
 147     {
 148         sLog.outError("Addon packet uncompress error :(");
 149         return false;
 150     }
 151     return true;
 152 }
 153
 154 /* Code use in 1.10.2 when client not ignore ban state sended for addons. Saved for reference if client switch to use server ban state information
 155 void AddonHandler::BuildAddonPacket(WorldPacket* Source, WorldPacket* Target, uint32 Packetoffset)
 156 {
 157     ByteBuffer AddOnPacked;
 158     uLongf AddonRealSize;
 159     uint32 CurrentPosition;
 160     uint32 TempValue;
 161
 162     *Source >> TempValue;                                   //get real size of the packed structure
 163
 164     AddonRealSize = TempValue;                              //temp value becouse ZLIB only excepts uLongf
 165
 166     CurrentPosition = Source->rpos();                       //get the position of the pointer in the structure
 167
 168     AddOnPacked.resize(AddonRealSize);                      //resize target for zlib action
 169
 170     if (!uncompress((uint8*)AddOnPacked.contents(), &AddonRealSize, (uint8*)(*Source).contents() + CurrentPosition, (*Source).size() - CurrentPosition)!= Z_OK)
 171     {
 172         bool* AddonAllowed = new bool;                      //handle addon check and enable-ing
 173
 174         uint32 Unknown1;
 175         uint8 Unknown0;
 176
 177         AddOnPacked >> Unknown0;
 178         AddOnPacked >> Unknown1;
 179
 180         Target->Initialize(SMSG_ADDON_INFO);
 181
 182         uint32 i = 5;                                       //offset for addon extraction
 183         while(i != AddOnPacked.size())
 184         {
 185             std::string AddonNames;
 186             AddOns* Addonstr = new AddOns;
 187             uint8 unk6;
 188             uint64 CRCCHECK;
 189             AddOnPacked >> AddonNames >> CRCCHECK >> unk6;
 190
 191             //sLog.outDebug("ADDON:    Name:%s CRC:%x Unknown:%x",AddonNames.c_str(), CRCCHECK,unk6);
 192
 193             Addonstr->Name = AddonNames;
 194             Addonstr->CRC = CRCCHECK;
 195
 196             //if not allowed but unknown added to list
 197             if (GetAddonStatus(Addonstr, AddonAllowed))     // If addon is new
 198             {
 199                 Addonstr->Enabled = m_Addon_Default;        // by default new addons are set from Config file
 200                 *AddonAllowed = m_Addon_Default;            // Set addon allowed on default value
 201                 _AddAddon(Addonstr);
 202                 sLog.outDetail("Found new Addon, Name:%s CRC:%x Unknown:%x",AddonNames.c_str(), CRCCHECK, unk6);
 203             }
 204
 205             if (CRCCHECK == 0x4C1C776D01LL)                 //If addon is Standard addon CRC
 206             {
 207                                                             //value's standard Addons
 208                 *Target << uint8(0) << uint8(2) << uint8(1) << uint8(0) << uint32(0);
 209             }
 210             else if (*AddonAllowed)                         //if addon is Custom addons
 211                                                             //value's enable addon
 212                 *Target << uint8(0x00) << uint8(0x01) << uint8(0x00) << uint8(0x01);
 213             else
 214                                                             //value's disable addom
 215                 *Target << uint8(0x00) << uint8(0x0) << uint8(0x00) << uint8(0x0);
 216
 217             i += AddonNames.size() + 10;
 218         }
 219         *Target << uint8(0x0);
 220
 221         //delete mem allocation
 222         delete AddonAllowed;
 223     }
 224     else
 225     {
 226         //handle uncompress error
 227     }
 228 }
 229 */