void HandleMoveSetModMovementForceMagnitudeAck(MovementSpeedAck setModMovementForceMagnitudeAck)
{
Unit mover = _player.m_unitMovedByMe;
Cypher.Assert(mover != null); // there must always be a mover
_player.ValidateMovementInfo(setModMovementForceMagnitudeAck.Ack.Status);
// prevent tampered movement data
if (setModMovementForceMagnitudeAck.Ack.Status.Guid != mover.GetGUID())
{
Log.outError(LogFilter.Network, $"HandleSetModMovementForceMagnitudeAck: guid error, expected {mover.GetGUID()}, got {setModMovementForceMagnitudeAck.Ack.Status.Guid}");
return;
}
// skip all except last
if (_player.m_movementForceModMagnitudeChanges > 0)
{
--_player.m_movementForceModMagnitudeChanges;
if (_player.m_movementForceModMagnitudeChanges == 0)
{
float expectedModMagnitude = 1.0f;
MovementForces movementForces = mover.GetMovementForces();
if (movementForces != null)
{
expectedModMagnitude = movementForces.GetModMagnitude();
}
if (Math.Abs(expectedModMagnitude - setModMovementForceMagnitudeAck.Speed) > 0.01f)
{
Log.outDebug(LogFilter.Misc, $"Player {_player.GetName()} from account id {_player.GetSession().GetAccountId()} kicked for incorrect movement force magnitude (must be {expectedModMagnitude} instead {setModMovementForceMagnitudeAck.Speed})");
_player.GetSession().KickPlayer();
return;
}
}
}
setModMovementForceMagnitudeAck.Ack.Status.Time += m_clientTimeDelay;
MoveUpdateSpeed updateModMovementForceMagnitude = new MoveUpdateSpeed(ServerOpcodes.MoveUpdateModMovementForceMagnitude);
updateModMovementForceMagnitude.Status = setModMovementForceMagnitudeAck.Ack.Status;
updateModMovementForceMagnitude.Speed = setModMovementForceMagnitudeAck.Speed;
mover.SendMessageToSet(updateModMovementForceMagnitude, false);
}
void HandleForceSpeedChangeAck(MovementSpeedAck packet)
{
GetPlayer().ValidateMovementInfo(packet.Ack.Status);
// now can skip not our packet
if (GetPlayer().GetGUID() != packet.Ack.Status.Guid)
{
return;
}
/*----------------*/
// client ACK send one packet for mounted/run case and need skip all except last from its
// in other cases anti-cheat check can be fail in false case
UnitMoveType move_type;
ClientOpcodes opcode = packet.GetOpcode();
switch (opcode)
{
case ClientOpcodes.MoveForceWalkSpeedChangeAck:
move_type = UnitMoveType.Walk;
break;
case ClientOpcodes.MoveForceRunSpeedChangeAck:
move_type = UnitMoveType.Run;
break;
case ClientOpcodes.MoveForceRunBackSpeedChangeAck:
move_type = UnitMoveType.RunBack;
break;
case ClientOpcodes.MoveForceSwimSpeedChangeAck:
move_type = UnitMoveType.Swim;
break;
case ClientOpcodes.MoveForceSwimBackSpeedChangeAck:
move_type = UnitMoveType.SwimBack;
break;
case ClientOpcodes.MoveForceTurnRateChangeAck:
move_type = UnitMoveType.TurnRate;
break;
case ClientOpcodes.MoveForceFlightSpeedChangeAck:
move_type = UnitMoveType.Flight;
break;
case ClientOpcodes.MoveForceFlightBackSpeedChangeAck:
move_type = UnitMoveType.FlightBack;
break;
case ClientOpcodes.MoveForcePitchRateChangeAck:
move_type = UnitMoveType.PitchRate;
break;
default:
Log.outError(LogFilter.Network, "WorldSession.HandleForceSpeedChangeAck: Unknown move type opcode: {0}", opcode);
return;
}
// skip all forced speed changes except last and unexpected
// in run/mounted case used one ACK and it must be skipped. m_forced_speed_changes[MOVE_RUN] store both.
if (GetPlayer().m_forced_speed_changes[(int)move_type] > 0)
{
--GetPlayer().m_forced_speed_changes[(int)move_type];
if (GetPlayer().m_forced_speed_changes[(int)move_type] > 0)
{
return;
}
}
if (!GetPlayer().GetTransport() && Math.Abs(GetPlayer().GetSpeed(move_type) - packet.Speed) > 0.01f)
{
if (GetPlayer().GetSpeed(move_type) > packet.Speed) // must be greater - just correct
{
Log.outError(LogFilter.Network, "{0}SpeedChange player {1} is NOT correct (must be {2} instead {3}), force set to correct value",
move_type, GetPlayer().GetName(), GetPlayer().GetSpeed(move_type), packet.Speed);
GetPlayer().SetSpeedRate(move_type, GetPlayer().GetSpeedRate(move_type));
}
else // must be lesser - cheating
{
Log.outDebug(LogFilter.Server, "Player {0} from account id {1} kicked for incorrect speed (must be {2} instead {3})",
GetPlayer().GetName(), GetPlayer().GetSession().GetAccountId(), GetPlayer().GetSpeed(move_type), packet.Speed);
GetPlayer().GetSession().KickPlayer();
}
}
}
