public void handleChat(Packet3Chat par1Packet3Chat) {
    ModLoader.serverChat(this, par1Packet3Chat.message);

    if (playerEntity.getChatVisibility() == 2) {
      sendPacketToPlayer(new Packet3Chat("Cannot send chat message."));
      return;
    }

    String s = par1Packet3Chat.message;

    if (s.length() > 100) {
      kickPlayerFromServer("Chat message too long");
      return;
    }

    s = s.trim();

    for (int i = 0; i < s.length(); i++) {
      if (!ChatAllowedCharacters.isAllowedCharacter(s.charAt(i))) {
        kickPlayerFromServer("Illegal characters in chat");
        return;
      }
    }

    if (s.startsWith("/")) {
      func_72566_d(s);
    } else {
      if (playerEntity.getChatVisibility() == 1) {
        sendPacketToPlayer(new Packet3Chat("Cannot send chat message."));
        return;
      }

      s =
          (new StringBuilder())
              .append("<")
              .append(playerEntity.username)
              .append("> ")
              .append(s)
              .toString();
      logger.info(s);
      mcServer.getConfigurationManager().sendPacketToAllPlayers(new Packet3Chat(s, false));
    }

    chatSpamThresholdCount += 20;

    if (chatSpamThresholdCount > 200
        && !mcServer.getConfigurationManager().areCommandsAllowed(playerEntity.username)) {
      kickPlayerFromServer("disconnect.spam");
    }
  }
 public void registerPacket(Packet par1Packet) {
   logger.warning(
       (new StringBuilder())
           .append(getClass())
           .append(" wasn't prepared to deal with a ")
           .append(par1Packet.getClass())
           .toString());
   kickPlayerFromServer("Protocol error, unexpected packet");
 }
  public void handleFlying(Packet10Flying par1Packet10Flying) {
    WorldServer worldserver = mcServer.worldServerForDimension(playerEntity.dimension);
    field_72584_h = true;

    if (playerEntity.playerHasConqueredTheEnd) {
      return;
    }

    if (!field_72587_r) {
      double d = par1Packet10Flying.yPosition - lastPosY;

      if (par1Packet10Flying.xPosition == lastPosX
          && d * d < 0.01D
          && par1Packet10Flying.zPosition == lastPosZ) {
        field_72587_r = true;
      }
    }

    if (field_72587_r) {
      if (playerEntity.ridingEntity != null) {
        float f = playerEntity.rotationYaw;
        float f1 = playerEntity.rotationPitch;
        playerEntity.ridingEntity.updateRiderPosition();
        double d2 = playerEntity.posX;
        double d4 = playerEntity.posY;
        double d6 = playerEntity.posZ;
        double d8 = 0.0D;
        double d9 = 0.0D;

        if (par1Packet10Flying.rotating) {
          f = par1Packet10Flying.yaw;
          f1 = par1Packet10Flying.pitch;
        }

        if (par1Packet10Flying.moving
            && par1Packet10Flying.yPosition == -999D
            && par1Packet10Flying.stance == -999D) {
          if (par1Packet10Flying.xPosition > 1.0D || par1Packet10Flying.zPosition > 1.0D) {
            System.err.println(
                (new StringBuilder())
                    .append(playerEntity.username)
                    .append(" was caught trying to crash the server with an invalid position.")
                    .toString());
            kickPlayerFromServer("Nope!");
            return;
          }

          d8 = par1Packet10Flying.xPosition;
          d9 = par1Packet10Flying.zPosition;
        }

        playerEntity.onGround = par1Packet10Flying.onGround;
        playerEntity.onUpdateEntity();
        playerEntity.moveEntity(d8, 0.0D, d9);
        playerEntity.setPositionAndRotation(d2, d4, d6, f, f1);
        playerEntity.motionX = d8;
        playerEntity.motionZ = d9;

        if (playerEntity.ridingEntity != null) {
          worldserver.uncheckedUpdateEntity(playerEntity.ridingEntity, true);
        }

        if (playerEntity.ridingEntity != null) {
          playerEntity.ridingEntity.updateRiderPosition();
        }

        mcServer.getConfigurationManager().func_72358_d(playerEntity);
        lastPosX = playerEntity.posX;
        lastPosY = playerEntity.posY;
        lastPosZ = playerEntity.posZ;
        worldserver.updateEntity(playerEntity);
        return;
      }

      if (playerEntity.isPlayerSleeping()) {
        playerEntity.onUpdateEntity();
        playerEntity.setPositionAndRotation(
            lastPosX, lastPosY, lastPosZ, playerEntity.rotationYaw, playerEntity.rotationPitch);
        worldserver.updateEntity(playerEntity);
        return;
      }

      double d1 = playerEntity.posY;
      lastPosX = playerEntity.posX;
      lastPosY = playerEntity.posY;
      lastPosZ = playerEntity.posZ;
      double d3 = playerEntity.posX;
      double d5 = playerEntity.posY;
      double d7 = playerEntity.posZ;
      float f2 = playerEntity.rotationYaw;
      float f3 = playerEntity.rotationPitch;

      if (par1Packet10Flying.moving
          && par1Packet10Flying.yPosition == -999D
          && par1Packet10Flying.stance == -999D) {
        par1Packet10Flying.moving = false;
      }

      if (par1Packet10Flying.moving) {
        d3 = par1Packet10Flying.xPosition;
        d5 = par1Packet10Flying.yPosition;
        d7 = par1Packet10Flying.zPosition;
        double d10 = par1Packet10Flying.stance - par1Packet10Flying.yPosition;

        if (!playerEntity.isPlayerSleeping()
            && (d10 > 1.6499999999999999D || d10 < 0.10000000000000001D)) {
          kickPlayerFromServer("Illegal stance");
          logger.warning(
              (new StringBuilder())
                  .append(playerEntity.username)
                  .append(" had an illegal stance: ")
                  .append(d10)
                  .toString());
          return;
        }

        if (Math.abs(par1Packet10Flying.xPosition) > 32000000D
            || Math.abs(par1Packet10Flying.zPosition) > 32000000D) {
          kickPlayerFromServer("Illegal position");
          return;
        }
      }

      if (par1Packet10Flying.rotating) {
        f2 = par1Packet10Flying.yaw;
        f3 = par1Packet10Flying.pitch;
      }

      playerEntity.onUpdateEntity();
      playerEntity.ySize = 0.0F;
      playerEntity.setPositionAndRotation(lastPosX, lastPosY, lastPosZ, f2, f3);

      if (!field_72587_r) {
        return;
      }

      double d11 = d3 - playerEntity.posX;
      double d12 = d5 - playerEntity.posY;
      double d13 = d7 - playerEntity.posZ;
      double d14 = Math.min(Math.abs(d11), Math.abs(playerEntity.motionX));
      double d15 = Math.min(Math.abs(d12), Math.abs(playerEntity.motionY));
      double d16 = Math.min(Math.abs(d13), Math.abs(playerEntity.motionZ));
      double d17 = d14 * d14 + d15 * d15 + d16 * d16;

      if (d17 > 100D
          && (!mcServer.isSinglePlayer()
              || !mcServer.getServerOwner().equals(playerEntity.username))) {
        logger.warning(
            (new StringBuilder())
                .append(playerEntity.username)
                .append(" moved too quickly! ")
                .append(d11)
                .append(",")
                .append(d12)
                .append(",")
                .append(d13)
                .append(" (")
                .append(d14)
                .append(", ")
                .append(d15)
                .append(", ")
                .append(d16)
                .append(")")
                .toString());
        setPlayerLocation(
            lastPosX, lastPosY, lastPosZ, playerEntity.rotationYaw, playerEntity.rotationPitch);
        return;
      }

      float f4 = 0.0625F;
      boolean flag =
          worldserver
              .getCollidingBoundingBoxes(
                  playerEntity, playerEntity.boundingBox.copy().contract(f4, f4, f4))
              .isEmpty();

      if (playerEntity.onGround && !par1Packet10Flying.onGround && d12 > 0.0D) {
        playerEntity.addExhaustion(0.2F);
      }

      playerEntity.moveEntity(d11, d12, d13);
      playerEntity.onGround = par1Packet10Flying.onGround;
      playerEntity.addMovementStat(d11, d12, d13);
      double d18 = d12;
      d11 = d3 - playerEntity.posX;
      d12 = d5 - playerEntity.posY;

      if (d12 > -0.5D || d12 < 0.5D) {
        d12 = 0.0D;
      }

      d13 = d7 - playerEntity.posZ;
      d17 = d11 * d11 + d12 * d12 + d13 * d13;
      boolean flag1 = false;

      if (d17 > 0.0625D
          && !playerEntity.isPlayerSleeping()
          && !playerEntity.theItemInWorldManager.isCreative()) {
        flag1 = true;
        logger.warning(
            (new StringBuilder())
                .append(playerEntity.username)
                .append(" moved wrongly!")
                .toString());
      }

      playerEntity.setPositionAndRotation(d3, d5, d7, f2, f3);
      boolean flag2 =
          worldserver
              .getCollidingBoundingBoxes(
                  playerEntity, playerEntity.boundingBox.copy().contract(f4, f4, f4))
              .isEmpty();

      if (flag && (flag1 || !flag2) && !playerEntity.isPlayerSleeping()) {
        setPlayerLocation(lastPosX, lastPosY, lastPosZ, f2, f3);
        return;
      }

      AxisAlignedBB axisalignedbb =
          playerEntity
              .boundingBox
              .copy()
              .expand(f4, f4, f4)
              .addCoord(0.0D, -0.55000000000000004D, 0.0D);

      if (!mcServer.isFlightAllowed()
          && !playerEntity.theItemInWorldManager.isCreative()
          && !worldserver.isAABBNonEmpty(axisalignedbb)) {
        if (d18 >= -0.03125D) {
          ticksForFloatKick++;

          if (ticksForFloatKick > 80) {
            logger.warning(
                (new StringBuilder())
                    .append(playerEntity.username)
                    .append(" was kicked for floating too long!")
                    .toString());
            kickPlayerFromServer("Flying is not enabled on this server");
            return;
          }
        }
      } else {
        ticksForFloatKick = 0;
      }

      playerEntity.onGround = par1Packet10Flying.onGround;
      mcServer.getConfigurationManager().func_72358_d(playerEntity);
      playerEntity.updateFlyingState(playerEntity.posY - d1, par1Packet10Flying.onGround);
    }
  }