public void SendPing()
{
m_Ping = (int)m_PingStopwatch.ElapsedMilliseconds;
OutputMessage message = new OutputMessage();
message.AddU8(ClientServerOpCodes.Ping);
WriteToOutput(message);
m_PingSent++;
m_PingStopwatch.Restart();
}
void AddChecksum(OutputMessage message)
{
if (ChecksumEnabled)
{
uint checksum = Adler32(message.GetBuffer().ToArray(), (uint)message.GetBufferLength());
int pos = message.Tell();
message.Seek(0);
message.AddU32(checksum);
message.IncreaseHeaderLength(sizeof(uint));
message.Seek(pos + sizeof(uint));
}
}
public void SendSetTactics()
{
var optionStorage = OpenTibiaUnity.OptionStorage;
OutputMessage message = new OutputMessage();
message.AddU8(ClientServerOpCodes.SetTactics);
message.AddU8((byte)optionStorage.CombatAttackMode);
message.AddU8((byte)optionStorage.CombatChaseMode);
message.AddU8(optionStorage.CombatSecureMode ? (byte)1 : (byte)0);
message.AddU8((byte)optionStorage.CombatPvPMode);
WriteToOutput(message);
}
private void XteaEncrypt(OutputMessage message)
{
AddMessageLength(message);
int encryptedSize = message.GetBufferLength();
if ((encryptedSize % 8) != 0)
{
int n = 8 - (encryptedSize % 8);
message.AddPaddingBytes(n);
encryptedSize += n;
}
int indexedSize = message.GetBufferLength();
byte[] buffer = message.GetIndexedBuffer(indexedSize);
int readPos = 0;
while (readPos < encryptedSize / 4)
{
uint v0 = BitConverter.ToUInt32(buffer, readPos * 4);
uint v1 = BitConverter.ToUInt32(buffer, (readPos + 1) * 4);
uint delta = 0x61C88647;
uint sum = 0;
for (int i = 0; i < 32; i++)
{
v0 += ((v1 << 4 ^ v1 >> 5) + v1) ^ (sum + m_XteaKey[sum & 3]);
sum -= delta;
v1 += ((v0 << 4 ^ v0 >> 5) + v0) ^ (sum + m_XteaKey[sum >> 11 & 3]);
}
int tmpReadPos = 0;
byte[] v0Array = BitConverter.GetBytes(v0);
byte[] v1Array = BitConverter.GetBytes(v1);
foreach (byte v in v0Array)
{
buffer[readPos * 4 + tmpReadPos++] = v;
}
foreach (byte v in v1Array)
{
buffer[readPos * 4 + tmpReadPos++] = v;
}
readPos += 2;
}
message.ReplaceIndexedBuffer(buffer);
}
public void SendFollow(uint creatureID)
{
if (creatureID != 0)
{
m_Player.StopAutowalk(false);
}
OutputMessage message = new OutputMessage();
message.AddU8(ClientServerOpCodes.Follow);
message.AddU32(creatureID);
message.AddU32(creatureID); // Sequence
WriteToOutput(message);
}
public void SendGo(List <int> pathSteps)
{
if (pathSteps == null)
{
return;
}
m_CreatureStorage.ClearTargets();
OutputMessage message = new OutputMessage();
if (pathSteps.Count == 1)
{
switch ((PathDirection)(pathSteps[0] & 65535))
{
case PathDirection.East: message.AddU8(ClientServerOpCodes.GoEast); break;
case PathDirection.NorthEast: message.AddU8(ClientServerOpCodes.GoNorthEast); break;
case PathDirection.North: message.AddU8(ClientServerOpCodes.GoNorth); break;
case PathDirection.NorthWest: message.AddU8(ClientServerOpCodes.GoNorthWest); break;
case PathDirection.West: message.AddU8(ClientServerOpCodes.GoWest); break;
case PathDirection.SouthWest: message.AddU8(ClientServerOpCodes.GoSouthWest); break;
case PathDirection.South: message.AddU8(ClientServerOpCodes.GoSouth); break;
case PathDirection.SouthEast: message.AddU8(ClientServerOpCodes.GoSouthEast); break;
default: return;
}
}
else
{
int pathMaxSteps = (byte)System.Math.Min(byte.MaxValue, pathSteps.Count);
message.AddU8(ClientServerOpCodes.GoPath);
message.AddU8((byte)pathMaxSteps);
int i = 0;
while (i < pathMaxSteps)
{
message.AddU8((byte)(pathSteps[i] & 65535));
i++;
}
}
WriteToOutput(message);
}
public void Send(OutputMessage message)
{
if (m_Socket?.Connected != true)
{
return;
}
bool empty = m_MessageQueue.Count == 0;
m_MessageQueue.Enqueue(message);
if (empty)
{
publicSend(message);
}
}
public void SendUseOnCreature(UnityEngine.Vector3Int position, uint typeID, int positionOrData, uint creatureID)
{
if (position.x != 65535)
{
m_Player.StopAutowalk(false);
}
OutputMessage message = new OutputMessage();
message.AddU8(ClientServerOpCodes.UseObject);
message.AddPosition(position);
message.AddU16((ushort)typeID);
message.AddU8((byte)positionOrData);
message.AddU32(creatureID);
WriteToOutput(message);
}
public void SendUseTwoObjects(UnityEngine.Vector3Int firstPosition, uint firstID, int firstData, UnityEngine.Vector3Int secondPosition, uint secondID, int secondData)
{
if (firstPosition.x != 65535 || secondPosition.x != 65535)
{
m_Player.StopAutowalk(false);
}
OutputMessage message = new OutputMessage();
message.AddU8(ClientServerOpCodes.UseTwoObject);
message.AddPosition(firstPosition);
message.AddU16((ushort)firstID);
message.AddU8((byte)firstData);
message.AddPosition(secondPosition);
message.AddU16((ushort)secondID);
message.AddU8((byte)secondData);
WriteToOutput(message);
}
private void SendWorldName()
{
var index = WorldName.IndexOf("\n");
if (index > 0 && index != WorldName.Length - 1)
{
throw new Exception(@"ProtocolGame.SendWorldName: World name can't contain \n or \r\n.");
}
if (!WorldName.EndsWith("\n"))
{
WorldName += "\n";
}
OutputMessage message = new OutputMessage();
message.AddString(WorldName, true);
WriteToOutput(message, true);
}
public void WriteToOutput(OutputMessage message, bool raw = false)
{
// TODO: move this to the message pool
if (!raw)
{
if (XteaEnabled)
{
XteaEncrypt(message);
}
if (OpenTibiaUnity.GameManager.GetFeature(GameFeatures.GameProtocolChecksum))
{
AddChecksum(message);
}
else if (OpenTibiaUnity.GameManager.GetFeature(GameFeatures.GameProtocolSequenceNumber))
{
AddSequenceNumber(message);
}
AddMessageLength(message);
}
m_Connection?.Send(message);
}
protected void SendLogin()
{
OutputMessage message = new OutputMessage();
message.AddU8(ClientLoginOpCodes.EnterAccount);
message.AddU16(Utility.OperatingSystem.GetCurrentOs());
var gameManager = OpenTibiaUnity.GameManager;
message.AddU16((ushort)gameManager.ProtocolVersion);
if (gameManager.GetFeature(GameFeatures.GameClientVersion))
{
message.AddU32((uint)gameManager.ClientVersion);
}
if (gameManager.GetFeature(GameFeatures.GameContentRevision))
{
message.AddU16(Constants.ContentRevision);
message.AddU16(0);
}
else
{
message.AddU32(Constants.DatSignature);
}
message.AddU32(Constants.SprSignature);
message.AddU32(Constants.PicSignature);
if (gameManager.GetFeature(GameFeatures.GamePreviewState))
{
message.AddU8(0x00);
}
int offset = message.Tell();
var random = new System.Random();
if (gameManager.GetFeature(GameFeatures.GameLoginPacketEncryption))
{
message.AddU8(0); // first byte must be zero
GenerateXteaKey(random);
AddXteaKey(message);
}
if (gameManager.GetFeature(GameFeatures.GameAccountNames))
{
message.AddString(AccountName);
}
else
{
message.AddU32(uint.Parse(AccountName));
}
message.AddString(Password);
int paddingBytes = Crypto.RSA.GetRsaSize() - (message.Tell() - offset);
for (int i = 0; i < paddingBytes; i++)
{
message.AddU8((byte)random.Next(0xFF));
}
if (gameManager.GetFeature(GameFeatures.GameLoginPacketEncryption))
{
Crypto.RSA.EncryptMessage(message);
}
if (gameManager.GetFeature(GameFeatures.GameOGLInformation))
{
message.AddU8(1);
message.AddU8(1);
if (gameManager.ClientVersion >= 1072)
{
message.AddString(string.Format("{0} {1}", OpenTibiaUnity.GraphicsVendor, OpenTibiaUnity.GraphicsDevice));
}
else
{
message.AddString(OpenTibiaUnity.GraphicsDevice);
}
message.AddString(OpenTibiaUnity.GraphicsVersion);
}
if (gameManager.GetFeature(GameFeatures.GameAuthenticator))
{
offset = message.Tell();
message.AddU8(0);
message.AddString(string.Empty); // no auth-token
message.AddU8(0); // stay logged-in for a while
paddingBytes = Crypto.RSA.GetRsaSize() - (message.Tell() - offset);
for (int i = 0; i < paddingBytes; i++)
{
message.AddU8((byte)random.Next(0xFF));
}
Crypto.RSA.EncryptMessage(message);
}
if (gameManager.GetFeature(GameFeatures.GameProtocolChecksum))
{
ChecksumEnabled = true;
}
WriteToOutput(message);
if (gameManager.GetFeature(GameFeatures.GameLoginPacketEncryption))
{
XteaEnabled = true;
}
}
// TODO: use a pool instead
// and confirm the encryption of the packet ONLY on a successful sent
// This is working, but using a pool is more of a robust
public void SendLoginPacket(uint challengeTimestamp, byte challengeRandom)
{
OutputMessage message = new OutputMessage();
message.AddU8(ClientServerOpCodes.PendingGame);
message.AddU16(Utility.OperatingSystem.GetCurrentOs());
var gameManager = OpenTibiaUnity.GameManager;
message.AddU16((ushort)gameManager.ProtocolVersion);
if (gameManager.GetFeature(GameFeatures.GameClientVersion))
{
message.AddU32((uint)gameManager.ClientVersion);
}
if (gameManager.GetFeature(GameFeatures.GameContentRevision))
{
message.AddU16(Constants.ContentRevision);
}
if (gameManager.GetFeature(GameFeatures.GamePreviewState))
{
message.AddU8(0);
}
int offset = message.Tell();
message.AddU8(0); // first byte must be zero;
var random = new System.Random();
if (gameManager.GetFeature(GameFeatures.GameLoginPacketEncryption))
{
GenerateXteaKey(random);
AddXteaKey(message);
message.AddU8(0x00); // gm
}
if (gameManager.GetFeature(GameFeatures.GameSessionKey))
{
message.AddString(SessionKey);
message.AddString(CharacterName);
}
else
{
if (gameManager.GetFeature(GameFeatures.GameAccountNames))
{
message.AddString(AccountName);
}
else
{
message.AddU32(uint.Parse(AccountName));
}
message.AddString(CharacterName);
message.AddString(Password);
if (gameManager.GetFeature(GameFeatures.GameAuthenticator))
{
message.AddString(AuthenticatorToken);
}
}
if (gameManager.GetFeature(GameFeatures.GameChallengeOnLogin))
{
message.AddU32(challengeTimestamp);
message.AddU8(challengeRandom);
}
int paddingBytes = Crypto.RSA.GetRsaSize() - (message.Tell() - offset);
for (int i = 0; i < paddingBytes; i++)
{
message.AddU8((byte)random.Next(0xFF));
}
if (gameManager.GetFeature(GameFeatures.GameLoginPacketEncryption))
{
Crypto.RSA.EncryptMessage(message);
}
if (gameManager.GetFeature(GameFeatures.GameProtocolChecksum))
{
ChecksumEnabled = true;
}
WriteToOutput(message);
if (gameManager.GetFeature(GameFeatures.GameLoginPacketEncryption))
{
XteaEnabled = true;
}
}