PacketLog.cpp

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/*
 * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * 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/>.
 */
 
#include "PacketLog.h"
#include "Config.h"
#include "GameTime.h"
#include "IpAddress.h"
#include "Realm.h"
#include "Timer.h"
#include "World.h"
#include "WorldPacket.h"
 
#pragma pack(push, 1)
 
// Packet logging structures in PKT 3.1 format
struct LogHeader
{
 char Signature[3];
 uint16 FormatVersion;
 uint8 SnifferId;
 uint32 Build;
 char Locale[4];
 uint8 SessionKey[40];
 uint32 SniffStartUnixtime;
 uint32 SniffStartTicks;
 uint32 OptionalDataSize;
};
 
struct PacketHeader
{
 // used to uniquely identify a connection
 struct OptionalData
 {
 uint8 SocketIPBytes[16];
 uint32 SocketPort;
 };
 
 uint32 Direction;
 uint32 ConnectionId;
 uint32 ArrivalTicks;
 uint32 OptionalDataSize;
 uint32 Length;
 OptionalData OptionalData;
 uint32 Opcode;
};
 
#pragma pack(pop)
 
PacketLog::PacketLog() : _file(nullptr)
{
 std::call_once(_initializeFlag, &PacketLog::Initialize, this);
}
 
PacketLog::~PacketLog()
{
 if (_file)
 fclose(_file);
 
 _file = nullptr;
}
 
PacketLog* PacketLog::instance()
{
 static PacketLog instance;
 return &instance;
}
 
void PacketLog::Initialize()
{
 std::string logsDir = sConfigMgr->GetStringDefault("LogsDir", "");
 
 if (!logsDir.empty())
 if ((logsDir.at(logsDir.length() - 1) != '/') && (logsDir.at(logsDir.length() - 1) != '\\'))
 logsDir.push_back('/');
 
 std::string logname = sConfigMgr->GetStringDefault("PacketLogFile", "");
 if (!logname.empty())
 {
 _file = fopen((logsDir + logname).c_str(), "wb");
 
 if (CanLogPacket())
 {
 LogHeader header;
 header.Signature[0] = 'P'; header.Signature[1] = 'K'; header.Signature[2] = 'T';
 header.FormatVersion = 0x0301;
 header.SnifferId = 'T';
 header.Build = realm.Build;
 header.Locale[0] = 'e'; header.Locale[1] = 'n'; header.Locale[2] = 'U'; header.Locale[3] = 'S';
 std::memset(header.SessionKey, 0, sizeof(header.SessionKey));
 header.SniffStartUnixtime = GameTime::GetGameTime();
 header.SniffStartTicks = getMSTime();
 header.OptionalDataSize = 0;
 
 fwrite(&header, sizeof(header), 1, _file);
 }
 }
}
 
void PacketLog::LogPacket(WorldPacket const& packet, Direction direction, boost::asio::ip::address const& addr, uint16 port, ConnectionType connectionType)
{
 std::lock_guard<std::mutex> lock(_logPacketLock);
 
 PacketHeader header;
 header.Direction = direction == CLIENT_TO_SERVER ? 0x47534d43 : 0x47534d53;
 header.ConnectionId = connectionType;
 header.ArrivalTicks = getMSTime();
 
 header.OptionalDataSize = sizeof(header.OptionalData);
 memset(header.OptionalData.SocketIPBytes, 0, sizeof(header.OptionalData.SocketIPBytes));
 if (addr.is_v4())
 {
 auto bytes = addr.to_v4().to_bytes();
 memcpy(header.OptionalData.SocketIPBytes, bytes.data(), bytes.size());
 }
 else if (addr.is_v6())
 {
 auto bytes = addr.to_v6().to_bytes();
 memcpy(header.OptionalData.SocketIPBytes, bytes.data(), bytes.size());
 }
 
 header.OptionalData.SocketPort = port;
 std::size_t size = packet.size();
 if (direction == CLIENT_TO_SERVER)
 size -= 2;
 
 header.Length = size + sizeof(header.Opcode);
 header.Opcode = packet.GetOpcode();
 
 fwrite(&header, sizeof(header), 1, _file);
 if (size)
 {
 uint8 const* data = packet.contents();
 if (direction == CLIENT_TO_SERVER)
 data += 2;
 fwrite(data, 1, size, _file);
 }
 
 fflush(_file);
}