void WorldSession::ReadAddonsInfo(ByteBuffer &data)
{
    if (data.rpos() + 4 > data.size())
        return;

    uint32 size;
    data >> size;

    if (!size)
        return;

    if (size > 0xFFFFF)
    {
        TC_LOG_DEBUG("addon", "WorldSession::ReadAddonsInfo: AddOnInfo too big, size %u", size);
        return;
    }

    uLongf uSize = size;

    uint32 pos = data.rpos();

    ByteBuffer addonInfo;
    addonInfo.resize(size);

    if (uncompress(addonInfo.contents(), &uSize, data.contents() + pos, data.size() - pos) == Z_OK)
    {
        uint32 addonsCount;
        addonInfo >> addonsCount;                         // addons count

        for (uint32 i = 0; i < addonsCount; ++i)
        {
            std::string addonName;
            uint8 enabled;
            uint32 crc, unk1;

            // check next addon data format correctness
            if (addonInfo.rpos() + 1 > addonInfo.size())
                return;

            addonInfo >> addonName;

            addonInfo >> enabled >> crc >> unk1;

            TC_LOG_DEBUG("addon", "AddOn: %s (CRC: 0x%x) - enabled: 0x%x - Unknown2: 0x%x", addonName.c_str(), crc, enabled, unk1);

            AddonInfo addon(addonName, enabled, crc, 2, true);

            SavedAddon const* savedAddon = AddonMgr::GetAddonInfo(addonName);
            if (savedAddon)
            {
                if (addon.CRC != savedAddon->CRC)
                    TC_LOG_WARN("addon", " Addon: %s: modified (CRC: 0x%x) - accountID %d)", addon.Name.c_str(), savedAddon->CRC, GetAccountId());
                else
                    TC_LOG_DEBUG("addon", "Addon: %s: validated (CRC: 0x%x) - accountID %d", addon.Name.c_str(), savedAddon->CRC, GetAccountId());
            }
            else
            {
                AddonMgr::SaveAddon(addon);
                TC_LOG_WARN("addon", "Addon: %s: unknown (CRC: 0x%x) - accountId %d (storing addon name and checksum to database)", addon.Name.c_str(), addon.CRC, GetAccountId());
            }

            /// @todo Find out when to not use CRC/pubkey, and other possible states.
            m_addonsList.push_back(addon);
        }

        uint32 currentTime;
        addonInfo >> currentTime;
        TC_LOG_DEBUG("addon", "AddOn: CurrentTime: %u", currentTime);
    }
    else
        TC_LOG_DEBUG("addon", "AddOn: Addon packet uncompress error!");
}