src/game/AddonHandler.cpp

   1 /*
   2  * Copyright (C) 2005-2008 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         while(AddOnPacked.rpos() < AddOnPacked.size())
  84         {
  85             std::string AddonNames;
  86             uint8 unk6;
  87             uint32 crc, unk7;
  88
  89             // check next addon data format correctness
  90             if(AddOnPacked.rpos()+1+4+4+1 > AddOnPacked.size())
  91                 return false;
  92
  93             AddOnPacked >> AddonNames;
  94
  95             // recheck next addon data format correctness
  96             if(AddOnPacked.rpos()+4+4+1 > AddOnPacked.size())
  97                 return false;
  98
  99             AddOnPacked >> crc >> unk7 >> unk6;
 100
 101             //sLog.outDebug("ADDON: Name:%s CRC:%x Unknown1 :%x Unknown2 :%x", AddonNames.c_str(), crc, unk7, unk6);
 102
 103             *Target << (uint8)2;
 104
 105             uint8 unk1 = 1;
 106             *Target << (uint8)unk1;
 107             if (unk1)
 108             {
 109                 uint8 unk2 = crc != 0x1c776d01LL;           //If addon is Standard addon CRC
 110                 *Target << (uint8)unk2;
 111                 if (unk2)
 112                     Target->append(tdata, sizeof(tdata));
 113
 114                 *Target << (uint32)0;
 115             }
 116
 117             uint8 unk3 = 0;
 118             *Target << (uint8)unk3;
 119             if (unk3)
 120             {
 121                 // String, 256
 122             }
 123         }
 124     }
 125     else
 126     {
 127         sLog.outError("Addon packet uncompress error :(");
 128         return false;
 129     }
 130     return true;
 131 }
 132
 133 /* 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
 134 void AddonHandler::BuildAddonPacket(WorldPacket* Source, WorldPacket* Target, uint32 Packetoffset)
 135 {
 136     ByteBuffer AddOnPacked;
 137     uLongf AddonRealSize;
 138     uint32 CurrentPosition;
 139     uint32 TempValue;
 140
 141     *Source >> TempValue;                                   //get real size of the packed structure
 142
 143     AddonRealSize = TempValue;                              //temp value becouse ZLIB only excepts uLongf
 144
 145     CurrentPosition = Source->rpos();                       //get the position of the pointer in the structure
 146
 147     AddOnPacked.resize(AddonRealSize);                      //resize target for zlib action
 148
 149     if (!uncompress((uint8*)AddOnPacked.contents(), &AddonRealSize, (uint8*)(*Source).contents() + CurrentPosition, (*Source).size() - CurrentPosition)!= Z_OK)
 150     {
 151         bool* AddonAllowed = new bool;                      //handle addon check and enable-ing
 152
 153         uint32 Unknown1;
 154         uint8 Unknown0;
 155
 156         AddOnPacked >> Unknown0;
 157         AddOnPacked >> Unknown1;
 158
 159         Target->Initialize(SMSG_ADDON_INFO);
 160
 161         uint32 i = 5;                                       //offset for addon extraction
 162         while(i != AddOnPacked.size())
 163         {
 164             std::string AddonNames;
 165             AddOns* Addonstr = new AddOns;
 166             uint8 unk6;
 167             uint64 CRCCHECK;
 168             AddOnPacked >> AddonNames >> CRCCHECK >> unk6;
 169
 170             //sLog.outDebug("ADDON:    Name:%s CRC:%x Unknown:%x",AddonNames.c_str(), CRCCHECK,unk6);
 171
 172             Addonstr->Name = AddonNames;
 173             Addonstr->CRC = CRCCHECK;
 174
 175             //if not allowed but unknown added to list
 176             if (GetAddonStatus(Addonstr, AddonAllowed))     // If addon is new
 177             {
 178                 Addonstr->Enabled = m_Addon_Default;        // by default new addons are set from Config file
 179                 *AddonAllowed = m_Addon_Default;            // Set addon allowed on default value
 180                 _AddAddon(Addonstr);
 181                 sLog.outDetail("Found new Addon, Name:%s CRC:%x Unknown:%x",AddonNames.c_str(), CRCCHECK, unk6);
 182             }
 183
 184             if (CRCCHECK == 0x4C1C776D01LL)                 //If addon is Standard addon CRC
 185             {
 186                                                             //value's standard Addons
 187                 *Target << uint8(0) << uint8(2) << uint8(1) << uint8(0) << uint32(0);
 188             }
 189             else if (*AddonAllowed)                         //if addon is Custom addons
 190                                                             //value's enable addon
 191                 *Target << uint8(0x00) << uint8(0x01) << uint8(0x00) << uint8(0x01);
 192             else
 193                                                             //value's disable addom
 194                 *Target << uint8(0x00) << uint8(0x0) << uint8(0x00) << uint8(0x0);
 195
 196             i += AddonNames.size() + 10;
 197         }
 198         *Target << uint8(0x0);
 199
 200         //delete mem allocation
 201         delete AddonAllowed;
 202     }
 203     else
 204     {
 205         //handle uncompress error
 206     }
 207 }
 208 */