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• With Slick, how to change the resolution during gameplay?

  - by TheLima

  I am developing a tile-based strategy game using Java and the Slick API. So far so good, but I've come to a standstill on my options menu. I have plans for the user to be able to change the resolution during gameplay (it is pretty common, after all). I can already change to fullscreen and back to windowed, this was pretty simple... //"fullScreenOption" is a checkbox-like button. if (fullScreenOption.isMouseOver(mouseX, mouseY)) { if (input.isMouseButtonDown(Input.MOUSE_LEFT_BUTTON)) { fullScreenOption.state = !fullScreenOption.state; container.setFullscreen(fullScreenOption.state); } } But the container class (Implemented by Slick, not me), contrary to my previous beliefs, does not seem to have any resolution-change functions! And that's pretty much the situation...I know it's possible, but i don't know how to do it, nor what is the class responsible! The AppGameContainer class, used on the very start of the game's initialization, is the only place with any functions for changing the display-mode that I've found so far, but it's only used at the very start, and i haven't found a way to travel back to it from my options menu. //This is my implementation of it... public static void main(String[] args) throws SlickException { AppGameContainer app = new AppGameContainer(new Main()); // app.setTargetFrameRate(60); app.setVSync(true); app.setDisplayMode(800, 600, false); app.start(); } I can define it as a static global on the Main, but it's probably a (very) bad way to do it...

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• How to install Ubuntu 12.04.1 in EFI mode with Encrypted LVM?

  - by g0lem

  I'm trying to properly install Ubuntu 12.04.1 LTS 64-bit PC (AMD64) with the alternate install CD ".iso" on a lenovo Thinkpad X220. Default Hard Disk (with a pre-installed version of Windows 7) has been replaced with a brand new SSD. The UEFI BIOS of the lenovo Thinkpad X220 is set to "UEFI Boot only" & "USB UEFI BIOS Support" is enabled (I'm using an external USB DVD reader to perform Ubuntu installation). The BIOS is a Phoenix SecureCore Tiano, BIOS version is 8DET56WW (1.26). The attempts below are made with the UEFI BIOS settings described above. Here's what I've tried so far: Boot on a live GParted CD Create a GPT partition table Create a FAT32 partition for UEFI System, set the partition to "EF00" type ("boot" flag) Leave remaining space unformated Boot on Ubuntu 12.04.1 LTS 64-bit PC (AMD64) with alternate CD: Perform the install with network updates enabled Use manual partitioning FAT32 partition created with GParted is used as "EFI System partition" Remaining space is set to be used as "Physical volume for LVM" Then "Configure encrypted volumes" using the previous "Physical volume for LVM" as the encrypted container, passphrase is setup. "Configure the Logical Volume Manager" creating a volume Group using the encrypted container /dev/mapper/sda2_crypt Creation of the Logical Volumes "Create logical volume", choosing the previously created volume Group Assign a mount point and file system to the Logical volumes : LV-root for / LV-var for /var LV-usr for /usr LV-usr-local for /usr/local LV-swap for swap LV-home for /home NOTE: /tmp would be in RAM only using TMPFS Bootloader step: neither my ESP partition (/dev/sda1, /dev/sda or MBR) seems to be the right place for GRUB, I get the following message (X suffix is for demonstration only): unable to install grub in /dev/sdaX Executing 'grub-install /dev/sdaX' failed This is a fatal error. Finish installation without the Bootloader & Reboot The system doesn't start, there's no EFI/GRUB menu at startup. What are the steps to perform a clean and working installation of Ubuntu 12.04.1 Precise Pangolin, 64bit version in U(EFI) mode using the encrypted LUKS + LVM scheme described above?

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• background in JAVA [closed]

  - by leen.zd

  how can i put a background image in my java code? this is my code... what's error? import java.awt.Container; import java.awt.Dimension; import java.awt.Graphics; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import javax.imageio.ImageIO; import javax.swing.JFrame; import javax.swing.JPanel; public class background extends JFrame { private Container c; private JPanel imagePanel; public background() { initialize(); } private void initialize() { setDefaultCloseOperation(EXIT_ON_CLOSE); c = getContentPane(); imagePanel = new JPanel() { public void paint(Graphics g) { try { BufferedImage image = ImageIO.read(new File("http://www.signe-zodiaque.com/images/signes/balance.jpg")); g.drawImage(image, 1000, 2000, null); } catch (IOException e) { e.printStackTrace(); } } }; imagePanel.setPreferredSize(new Dimension(640, 480)); c.add(imagePanel); }

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• How to setup my texture cordinates correctly in GLSL 150 and OpenGL 3.3?

  - by RubyKing

  I'm trying to do texture mapping in GLSL 150 and OpenGL 3.3 Here are my shaders I've tried my best to get this correct as possible hopefully this is :) I'm guessing you want to know what the problem is well my texture shows but not in its fullest form just one section of it not the full texture on the quad. All I can think of is its the texture cordinates in the main.cpp which is at the bottom of this post. FRAGMENT SHADER #version 150 in vec2 Texcoord_VSPS; out vec4 color; // Values that stay constant for the whole mesh. uniform sampler2D myTextureSampler; //Main Entry Point void main() { // Output color = color of the texture at the specified UV color = texture2D( myTextureSampler, Texcoord_VSPS ); } VERTEX SHADER #version 150 //Position Container in vec3 position; //Container for TexCoords attribute vec2 Texcoord0; out vec2 Texcoord_VSPS; //out vec2 ex_texcoord; //TO USE A DIFFERENT COORDINATE SYSTEM JUST MULTIPLY THE MATRIX YOU WANT //Main Entry Point void main() { //Translations and w Cordinates stuff gl_Position = vec4(position.xyz, 1.0); Texcoord_VSPS = Texcoord0; } LINK TO MAIN.CPP http://pastebin.com/t7Vg9L0k

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• If an entity is composed, is it still a god object?

  - by Telastyn

  I am working on a system to configure hardware. Unfortunately, there is tons of variety in the hardware, which means there's a wide variety of capabilities and configurations depending on what specific hardware the software connects to. To deal with this, we're using a Component Based Entity design where the "hardware" class itself is a very thin container for components that are composed at runtime based on what capabilities/configuration are available. This works great, and the design itself has worked well elsewhere (particularly in games). The problem is that all this software does is configure the hardware. As such, almost all of the code is a component of the hardware instance. While the consumer only ever works against the strongly typed interfaces for the components, it could be argued that the class that represents an instance of the hardware is a God Object. If you want to do anything to/with the hardware, you query an interface and work with it. So, even if the components of an object are modular and decoupled well, is their container a God Object and the downsides associated with the anti-pattern?

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• jQuery DataTables is messing op my CSS grids in IE8, how to fix?

  - by Brendan Vogt

  I am using ASP.NET MVC3 with the jQuery Datatable plug in. I am having an issues with my CSS layout when the datatable is on a page. If there is no datatable then everything displays fine. When the datatable is on the screen then it overlaps the footer of my website. I can't seem to get this to display correctly. I have a grid layout using the YUI3, and this is what I all use from YUI3 (in this order): cssreset-min cssfonts-min cssgrids-min cssbase-min This works fine in the latest version of FireFox. I am only testing on IE8, this is a requirement and most of the people at my work uses IE8. I have minified my HTML so that only the bare minimum is available. This is my HTML: <!DOCTYPE html> <html> <head> <title>My Website</title> <meta charset="utf-8" /> <meta http-equiv="X-UA-Compatible" content="IE=Edge" /> <link href="/Assets/Stylesheets/hef2.css" rel="stylesheet" /> <link href="/Assets/Stylesheets/jQuery-DataTables/css/jquery.dataTables.css" rel="stylesheet" /> </head> <body> <div id="hd">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Maecenas sit amet metus. Nunc quam elit, posuere nec, auctor in, rhoncus quis, dui. Aliquam erat volutpat. Ut dignissim, massa sit amet dignissim cursus, quam lacus feugiat.</div> <div id="bd"> <div class="yui3-g"> <div class="yui3-u" id="nav"> <div id="nav-container"> <div class="content"> <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Maecenas sit amet metus. Nunc quam elit, posuere nec, auctor in, rhoncus quis, dui. Aliquam erat volutpat. Ut dignissim, massa sit amet dignissim cursus, quam lacus feugiat.</p> </div> <div class="content"> <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Maecenas sit amet metus. Nunc quam elit, posuere nec, auctor in, rhoncus quis, dui. Aliquam erat volutpat. Ut dignissim, massa sit amet dignissim cursus, quam lacus feugiat.</p> </div> <div class="content"> <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Maecenas sit amet metus. Nunc quam elit, posuere nec, auctor in, rhoncus quis, dui. Aliquam erat volutpat. Ut dignissim, massa sit amet dignissim cursus, quam lacus feugiat.</p> </div> <div class="content"> <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Maecenas sit amet metus. Nunc quam elit, posuere nec, auctor in, rhoncus quis, dui. Aliquam erat volutpat. Ut dignissim, massa sit amet dignissim cursus, quam lacus feugiat.</p> </div> </div> </div> <div class="yui3-u" id="main"> <div id="main-container"> <div class="content"> <h1>Banks Dashboard</h1> <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Maecenas sit amet metus. Nunc quam elit, posuere nec, auctor in, rhoncus quis, dui. Aliquam erat volutpat. Ut dignissim, massa sit amet dignissim cursus, quam lacus feugiat.</p> </div> <div class="content"> <div id="banks-datatable-wrapper"> <div id="banks-datatable-container"></div> <div style="clear:both;"></div> </div> </div> <div class="content"> <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Maecenas sit amet metus. Nunc quam elit, posuere nec, auctor in, rhoncus quis, dui. Aliquam erat volutpat. Ut dignissim, massa sit amet dignissim cursus, quam lacus feugiat.</p> </div> <div class="content"> <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Maecenas sit amet metus. Nunc quam elit, posuere nec, auctor in, rhoncus quis, dui. Aliquam erat volutpat. Ut dignissim, massa sit amet dignissim cursus, quam lacus feugiat.</p> </div> <div class="content"> <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Maecenas sit amet metus. Nunc quam elit, posuere nec, auctor in, rhoncus quis, dui. Aliquam erat volutpat. Ut dignissim, massa sit amet dignissim cursus, quam lacus feugiat.</p> </div> </div> </div> </div> </div> <div id="ft">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Maecenas sit amet metus. Nunc quam elit, posuere nec, auctor in, rhoncus quis, dui. Aliquam erat volutpat. Ut dignissim, massa sit amet dignissim cursus, quam lacus feugiat.</div> <script src="/Assets/JavaScripts/jQuery/jquery-1.7.2.min.js"></script> <script src="/Assets/JavaScripts/jQuery-DataTables/jquery.dataTables.min.js"></script> <script type="text/javascript"> $(document).ready(function () { $('#banks-datatable-container').html('<table class="display" id="banks-datatable"></table>'); $('#banks-datatable').dataTable({ "aoColumns": [ { "sTitle": "Engine" }, { "sTitle": "Browser" }, { "sTitle": "Platform" }, { "sTitle": "Version", "sClass": "center" }, { "sTitle": "Grade" } ], "bAutoWidth": false, "bFilter": false, "bLengthChange": false, "bProcessing": true, //"bServerSide": true, "bSort": false, "iDisplayLength": 11, "sAjaxSource": '/Administration/Bank/List2' }); }); </script> </body> </html> This is the only CSS that I currently use together with the CSS of YUI3: body { margin: auto; width: 1025px; } #nav { width: 300px; } #main { width: 725px; } Can someone please help me get this sorted out? I have tried tried adding clear:both but it didn't work. Is the an online service like jsbin where I can paste/upload my HTML/CSS code/files? Code can viewed at: http://live.datatables.net/efosuj/3/edit. It displays correctly in the available viewer but when run separate in IE8 then it gives issues. UPDATE 2012-06-12 I managed to add the following and it works, but I would like to add it in a style, tried it but it didn't work: if (navigator.userAgent.toString().indexOf('MSIE') >= 0) { jQuery('#main-container').css('overflow', 'auto'); } This was added after the grid was loaded. Is this the only way to do this?

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• How to retrive message list from p2p

  - by cre-johnny07

  Hello friends I have a messaging system that uses p2p. Each peer has a incoming message list and a outgoing message list. What I need to do is whenever a new peer will join the mesh he will get the all the incoming messages from other peers and add those into it's own incoming message list. Now I know when I get the other peer info from I can ask them to give their own list to me. But I'm not finding the way how..? Any suggestion on this or help would be highly appreciated. I'm giving my code below. Thanking in Advance Johnny #region Instance Fields private string strOrigin = ""; //the chat member name private string m_Member; //the channel instance where we execute our service methods against private IServerChannel m_participant; //the instance context which in this case is our window since it is the service host private InstanceContext m_site; //our binding transport for the p2p mesh private NetPeerTcpBinding m_binding; //the factory to create our chat channel private ChannelFactory<IServerChannel> m_channelFactory; //an interface provided by the channel exposing events to indicate //when we have connected or disconnected from the mesh private IOnlineStatus o_statusHandler; //a generic delegate to execute a thread against that accepts no args private delegate void NoArgDelegate(); //an object to hold user details private IUserService userService; //an Observable Collection of object to get all the Application Instance Details in databas ObservableCollection<AppLoginInstance> appLoginInstances; // an Observable Collection of object to get all Incoming Messages types ObservableCollection<MessageType> inComingMessageTypes; // an Observable Collection of object to get all Outgoing Messages ObservableCollection<PDCL.ERP.DataModels.Message> outGoingMessages; // an Observable Collection of object to get all Incoming Messages ObservableCollection<PDCL.ERP.DataModels.Message> inComingMessages; //an Event Aggregator to publish event for other modules to subscribe private readonly IEventAggregator eventAggregator; /// <summary> /// an IUnityCOntainer to get the container /// </summary> private IUnityContainer container; private RefreshConnectionStatus refreshConnectionStatus; private RefreshConnectionStatusEventArgs args; private ReplyRequestMessage replyMessageRequest; private ReplyRequestMessageEventArgs eventsArgs; #endregion public P2pMessageService(IUserService UserService, IEventAggregator EventAggregator, IUnityContainer container) { userService = UserService; this.container = container; appLoginInstances = new ObservableCollection<AppLoginInstance>(); inComingMessageTypes = new ObservableCollection<MessageType>(); inComingMessages = new ObservableCollection<PDCL.ERP.DataModels.Message>(); outGoingMessages = new ObservableCollection<PDCL.ERP.DataModels.Message>(); this.args = new RefreshConnectionStatusEventArgs(); this.eventsArgs = new ReplyRequestMessageEventArgs(); this.eventAggregator = EventAggregator; this.refreshConnectionStatus = this.eventAggregator.GetEvent<RefreshConnectionStatus>(); this.replyMessageRequest = this.eventAggregator.GetEvent<ReplyRequestMessage>(); } #region IOnlineStatus Event Handlers void ostat_Offline(object sender, EventArgs e) { // we could update a status bar or animate an icon to //indicate to the user they have disconnected from the mesh //currently i don't have a "disconnect" button but adding it //should be trivial if you understand the rest of this code } void ostat_Online(object sender, EventArgs e) { try { m_participant.Join(userService.AppInstance); } catch (Exception Ex) { Logger.Exception(Ex, Ex.TargetSite.Name + ": " + Ex.TargetSite + ": " + Ex.Message); } } #endregion #region IServer Members //this method gets called from a background thread to //connect the service client to the p2p mesh specified //by the binding info in the app.config public void ConnectToMesh() { try { m_site = new InstanceContext(this); //use the binding from the app.config with default settings m_binding = new NetPeerTcpBinding("P2PMessageBinding"); m_channelFactory = new DuplexChannelFactory<IServerChannel>(m_site, "P2PMessageEndPoint"); m_participant = m_channelFactory.CreateChannel(); o_statusHandler = m_participant.GetProperty<IOnlineStatus>(); o_statusHandler.Online += new EventHandler(ostat_Online); o_statusHandler.Offline += new EventHandler(ostat_Offline); //m_participant.InitializeMesh(); //this.appLoginInstances.Add(this.userService.AppInstance); BackgroundWorkerHelper.DoWork<object>(() => { //this is an empty unhandled method on the service interface. //why? because for some reason p2p clients don't try to connect to the mesh //until the first service method call. so to facilitate connecting i call this method //to get the ball rolling. m_participant.InitializeMesh(); //SynchronizeMessage(this.inComingMessages); return new object(); }, arg => { }); this.appLoginInstances.Add(this.userService.AppInstance); } catch (Exception Ex) { Logger.Exception(Ex, Ex.TargetSite.Name + ": " + Ex.TargetSite + ": " + Ex.Message); } } public void Join(AppLoginInstance obj) { try { // Adding Instance to the PeerList if (appLoginInstances.SingleOrDefault(a => a.InstanceId == obj.InstanceId)==null) { appLoginInstances.Add(obj); this.refreshConnectionStatus.Publish(new RefreshConnectionStatusEventArgs() { Status = m_channelFactory.State }); } //this will retrieve any new members that have joined before the current user m_participant.SynchronizeMemberList(userService.AppInstance); } catch(Exception Ex) { Logger.Exception(Ex,Ex.TargetSite.Name + ": " + Ex.TargetSite + ": " + Ex.Message); } } /// <summary> /// Synchronizes member list /// </summary> /// <param name="obj">The AppLoginInstance Param</param> public void SynchronizeMemberList(AppLoginInstance obj) { //as member names come in we simply disregard duplicates and //add them to the member list, this way we can retrieve a list //of members already in the chatroom when we enter at any time. //again, since this is just an example this is the simplified //way to do things. the correct way would be to retrieve a list //of peernames and retrieve the metadata from each one which would //tell us what the member name is and add it. we would want to check //this list when we join the mesh to make sure our member name doesn't //conflict with someone else try { if (appLoginInstances.SingleOrDefault(a => a.InstanceId == obj.InstanceId) == null) { appLoginInstances.Add(obj); } } catch (Exception Ex) { Logger.Exception(Ex, Ex.TargetSite.Name + ": " + Ex.TargetSite + ": " + Ex.Message); } } /// <summary> /// This methos broadcasts the mesasge to all peers. /// </summary> /// <param name="msg">The whole message which is to be broadcasted</param> /// <param name="securityLevels"> Level of security</param> public void BroadCastMsg(PDCL.ERP.DataModels.Message msg, List<string> securityLevels) { try { foreach (string s in securityLevels) { if (this.userService.IsInRole(s)) { if (this.inComingMessages.Count == 0 && msg.CreatedByApp != this.userService.AppInstanceId) { this.inComingMessages.Add(msg); } else if (this.inComingMessages.SingleOrDefault(a => a.MessageId == msg.MessageId) == null && msg.CreatedByApp != this.userService.AppInstanceId) { this.inComingMessages.Add(msg); } } } } catch (Exception Ex) { Logger.Exception(Ex, Ex.TargetSite.Name + ": " + Ex.TargetSite + ": " + Ex.Message); } } /// <summary> /// /// </summary> /// <param name="msg">The Message to denyed</param> public void BroadCastReplyMsg(PDCL.ERP.DataModels.Message msg) { try { //if (this.inComingMessages.SingleOrDefault(a => a.MessageId == msg.MessageId) != null) //{ this.replyMessageRequest.Publish(new ReplyRequestMessageEventArgs() { Message = msg }); this.inComingMessages.Remove(this.inComingMessages.SingleOrDefault(o => o.MessageId == msg.MessageId)); //} } catch (Exception ex) { Logger.Exception(ex, ex.TargetSite.Name + ": " + ex.TargetSite + ": " + ex.Message); } } //again we need to sync the worker thread with the UI thread via Dispatcher public void Whisper(string Member, string MemberTo, string Message) { } public void InitializeMesh() { //do nothing } public void Leave(AppLoginInstance obj) { if (this.appLoginInstances.SingleOrDefault(a => a.InstanceId == obj.InstanceId) != null) { this.appLoginInstances.Remove(this.appLoginInstances.Single(a => a.InstanceId == obj.InstanceId)); } } //public void SynchronizeRemoveMemberList(AppLoginInstance obj) //{ // if (appLoginInstances.SingleOrDefault(a => a.InstanceId == obj.InstanceId) != null) // { // appLoginInstances.Remove(obj); // } //} #endregion

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• Rotating images makes ui slow

  - by 5w4rley

  i'm trying to implement kind of speedometer. i'm getting informations about rounds per minute, boost and load of an engine over bluetooth and i try to display them on the screen witch 3 arrows witch should point in the right direktion. i tried to use a rotate animation evry time i get data(10-100ms) to setup the arrows. but that makes my ui extremly slow. 500ms to react on a buttonclick. Doese someone know how to make it work better? source code: public void setTacho() { //rotate Tachonadel Rpmcurrentdegree=Rpmcurrentdegree+Rpmdegree; Rpmdegree=((rpms-lastrpm)*RPMtoDegree); RpmAnim=new RotateAnimation((float)Rpmcurrentdegree, (float)Rpmdegree, ivNadel.getWidth()/2, ivNadel.getHeight()/2); RpmAnim.setFillEnabled(true); RpmAnim.setFillAfter(true); ivNadel.setAnimation(RpmAnim); RpmAnim.start(); //rotate Boostbalken currentBoostDegree=currentBoostDegree+BoostDegree; BoostDegree=(boost-lastBoost)*BOOSTtoDegree; //rotate Loadbalken currentLoadDegree=currentLoadDegree+LoadDegree; LoadDegree=(load-lastLoad)*LOADtoDegree; BoostAnim=new RotateAnimation((float)-currentBoostDegree, (float)-BoostDegree, ivBoost.getWidth()/2, ivBoost.getHeight()/2); BoostAnim.setFillEnabled(true); BoostAnim.setFillAfter(true); ivBoost.setAnimation(BoostAnim); BoostAnim.start(); LoadAnim=new RotateAnimation((float)currentLoadDegree, (float)LoadDegree, ivLoad.getWidth()/2, ivLoad.getHeight()/2); LoadAnim.setFillEnabled(true); LoadAnim.setFillAfter(true); ivLoad.setAnimation(LoadAnim); LoadAnim.start(); } when i try to make the rotation only if the values have changed then it works only while they are changing but if they aren't the arrows jump back to the zero position. isnt setfillafter to tell the image that it should hold the new position? code: public void setTacho() { //rotate Tachonadel Rpmcurrentdegree=Rpmcurrentdegree+Rpmdegree; Rpmdegree=((rpms-lastrpm)*RPMtoDegree); if(Rpmdegree!=0) { RpmAnim=new RotateAnimation((float)Rpmcurrentdegree, (float)Rpmdegree, ivNadel.getWidth()/2, ivNadel.getHeight()/2); RpmAnim.setFillEnabled(true); RpmAnim.setFillAfter(true); ivNadel.setAnimation(RpmAnim); RpmAnim.start(); } //rotate Boostbalken currentBoostDegree=currentBoostDegree+BoostDegree; BoostDegree=(boost-lastBoost)*BOOSTtoDegree; //rotate Loadbalken currentLoadDegree=currentLoadDegree+LoadDegree; LoadDegree=(load-lastLoad)*LOADtoDegree; if(BoostDegree!=0) { BoostAnim=new RotateAnimation((float)-currentBoostDegree, (float)-BoostDegree, ivBoost.getWidth()/2, ivBoost.getHeight()/2); BoostAnim.setFillEnabled(true); BoostAnim.setFillAfter(true); ivBoost.setAnimation(BoostAnim); BoostAnim.start(); } if(LoadDegree!=0) { LoadAnim=new RotateAnimation((float)currentLoadDegree, (float)LoadDegree, ivLoad.getWidth()/2, ivLoad.getHeight()/2); LoadAnim.setFillEnabled(true); LoadAnim.setFillAfter(true); ivLoad.setAnimation(LoadAnim); LoadAnim.start(); } } i don't get it =( thx 4 help EDIT: part of the bluetooth Thread that calls the callback while (run) { try { bytes = mmInStream.read(buffer); if (connection.btCallback != null) { connection.btCallback.getData(buffer,bytes); } } catch (IOException e) { break; } the callback methode of the bluetooth thread: public void getData(byte[] bytes, int len) { setTacho(); }

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• Linux - Only first virtual interface can ping external gateway

  - by husvar

  I created 3 virtual interfaces with different mac addresses all linked to the same physical interface. I see that they successfully arp for the gw and they can ping (the request is coming in the packet capture in wireshark). However the ping utility does not count the responses. Does anyone knows the issue? I am running Ubuntu 14.04 in a VmWare. root@ubuntu:~# ip link sh 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000 link/ether 00:0c:29:bc:fc:8b brd ff:ff:ff:ff:ff:ff root@ubuntu:~# ip addr sh 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:bc:fc:8b brd ff:ff:ff:ff:ff:ff inet6 fe80::20c:29ff:febc:fc8b/64 scope link valid_lft forever preferred_lft forever root@ubuntu:~# ip route sh root@ubuntu:~# ip link add link eth0 eth0.1 addr 00:00:00:00:00:11 type macvlan root@ubuntu:~# ip link add link eth0 eth0.2 addr 00:00:00:00:00:22 type macvlan root@ubuntu:~# ip link add link eth0 eth0.3 addr 00:00:00:00:00:33 type macvlan root@ubuntu:~# ip -4 link sh 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000 link/ether 00:0c:29:bc:fc:8b brd ff:ff:ff:ff:ff:ff 18: eth0.1@eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default link/ether 00:00:00:00:00:11 brd ff:ff:ff:ff:ff:ff 19: eth0.2@eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default link/ether 00:00:00:00:00:22 brd ff:ff:ff:ff:ff:ff 20: eth0.3@eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default link/ether 00:00:00:00:00:33 brd ff:ff:ff:ff:ff:ff root@ubuntu:~# ip -4 addr sh 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever root@ubuntu:~# ip -4 route sh root@ubuntu:~# dhclient -v eth0.1 Internet Systems Consortium DHCP Client 4.2.4 Copyright 2004-2012 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/ Listening on LPF/eth0.1/00:00:00:00:00:11 Sending on LPF/eth0.1/00:00:00:00:00:11 Sending on Socket/fallback DHCPDISCOVER on eth0.1 to 255.255.255.255 port 67 interval 3 (xid=0x568eac05) DHCPREQUEST of 192.168.1.145 on eth0.1 to 255.255.255.255 port 67 (xid=0x568eac05) DHCPOFFER of 192.168.1.145 from 192.168.1.254 DHCPACK of 192.168.1.145 from 192.168.1.254 bound to 192.168.1.145 -- renewal in 1473 seconds. root@ubuntu:~# dhclient -v eth0.2 Internet Systems Consortium DHCP Client 4.2.4 Copyright 2004-2012 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/ Listening on LPF/eth0.2/00:00:00:00:00:22 Sending on LPF/eth0.2/00:00:00:00:00:22 Sending on Socket/fallback DHCPDISCOVER on eth0.2 to 255.255.255.255 port 67 interval 3 (xid=0x21e3114e) DHCPREQUEST of 192.168.1.146 on eth0.2 to 255.255.255.255 port 67 (xid=0x21e3114e) DHCPOFFER of 192.168.1.146 from 192.168.1.254 DHCPACK of 192.168.1.146 from 192.168.1.254 bound to 192.168.1.146 -- renewal in 1366 seconds. root@ubuntu:~# dhclient -v eth0.3 Internet Systems Consortium DHCP Client 4.2.4 Copyright 2004-2012 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/ Listening on LPF/eth0.3/00:00:00:00:00:33 Sending on LPF/eth0.3/00:00:00:00:00:33 Sending on Socket/fallback DHCPDISCOVER on eth0.3 to 255.255.255.255 port 67 interval 3 (xid=0x11dc5f03) DHCPREQUEST of 192.168.1.147 on eth0.3 to 255.255.255.255 port 67 (xid=0x11dc5f03) DHCPOFFER of 192.168.1.147 from 192.168.1.254 DHCPACK of 192.168.1.147 from 192.168.1.254 bound to 192.168.1.147 -- renewal in 1657 seconds. root@ubuntu:~# ip -4 link sh 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000 link/ether 00:0c:29:bc:fc:8b brd ff:ff:ff:ff:ff:ff 18: eth0.1@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default link/ether 00:00:00:00:00:11 brd ff:ff:ff:ff:ff:ff 19: eth0.2@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default link/ether 00:00:00:00:00:22 brd ff:ff:ff:ff:ff:ff 20: eth0.3@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default link/ether 00:00:00:00:00:33 brd ff:ff:ff:ff:ff:ff root@ubuntu:~# ip -4 addr sh 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever 18: eth0.1@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default inet 192.168.1.145/24 brd 192.168.1.255 scope global eth0.1 valid_lft forever preferred_lft forever 19: eth0.2@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default inet 192.168.1.146/24 brd 192.168.1.255 scope global eth0.2 valid_lft forever preferred_lft forever 20: eth0.3@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default inet 192.168.1.147/24 brd 192.168.1.255 scope global eth0.3 valid_lft forever preferred_lft forever root@ubuntu:~# ip -4 route sh default via 192.168.1.254 dev eth0.1 192.168.1.0/24 dev eth0.1 proto kernel scope link src 192.168.1.145 192.168.1.0/24 dev eth0.2 proto kernel scope link src 192.168.1.146 192.168.1.0/24 dev eth0.3 proto kernel scope link src 192.168.1.147 root@ubuntu:~# arping -c 5 -I eth0.1 192.168.1.254 ARPING 192.168.1.254 from 192.168.1.145 eth0.1 Unicast reply from 192.168.1.254 [58:98:35:57:a0:70] 6.936ms Unicast reply from 192.168.1.254 [58:98:35:57:a0:70] 2.986ms Unicast reply from 192.168.1.254 [58:98:35:57:a0:70] 0.654ms Unicast reply from 192.168.1.254 [58:98:35:57:a0:70] 5.137ms Unicast reply from 192.168.1.254 [58:98:35:57:a0:70] 2.426ms Sent 5 probes (1 broadcast(s)) Received 5 response(s) root@ubuntu:~# arping -c 5 -I eth0.2 192.168.1.254 ARPING 192.168.1.254 from 192.168.1.146 eth0.2 Unicast reply from 192.168.1.254 [58:98:35:57:a0:70] 5.665ms Unicast reply from 192.168.1.254 [58:98:35:57:a0:70] 3.753ms Unicast reply from 192.168.1.254 [58:98:35:57:a0:70] 16.500ms Unicast reply from 192.168.1.254 [58:98:35:57:a0:70] 3.287ms Unicast reply from 192.168.1.254 [58:98:35:57:a0:70] 32.438ms Sent 5 probes (1 broadcast(s)) Received 5 response(s) root@ubuntu:~# arping -c 5 -I eth0.3 192.168.1.254 ARPING 192.168.1.254 from 192.168.1.147 eth0.3 Unicast reply from 192.168.1.254 [58:98:35:57:a0:70] 4.422ms Unicast reply from 192.168.1.254 [58:98:35:57:a0:70] 2.429ms Unicast reply from 192.168.1.254 [58:98:35:57:a0:70] 2.321ms Unicast reply from 192.168.1.254 [58:98:35:57:a0:70] 40.423ms Unicast reply from 192.168.1.254 [58:98:35:57:a0:70] 2.268ms Sent 5 probes (1 broadcast(s)) Received 5 response(s) root@ubuntu:~# tcpdump -n -i eth0.1 -v & [1] 5317 root@ubuntu:~# ping -c5 -q -I eth0.1 192.168.1.254 PING 192.168.1.254 (192.168.1.254) from 192.168.1.145 eth0.1: 56(84) bytes of data. tcpdump: listening on eth0.1, link-type EN10MB (Ethernet), capture size 65535 bytes 13:18:37.612558 IP (tos 0x0, ttl 64, id 2595, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.1.145 > 192.168.1.254: ICMP echo request, id 5318, seq 2, length 64 13:18:37.618864 IP (tos 0x68, ttl 64, id 14493, offset 0, flags [none], proto ICMP (1), length 84) 192.168.1.254 > 192.168.1.145: ICMP echo reply, id 5318, seq 2, length 64 13:18:37.743650 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 192.168.1.87 tell 192.168.1.86, length 46 13:18:38.134997 IP (tos 0x0, ttl 128, id 23547, offset 0, flags [none], proto UDP (17), length 229) 192.168.1.86.138 > 192.168.1.255.138: NBT UDP PACKET(138) 13:18:38.614580 IP (tos 0x0, ttl 64, id 2596, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.1.145 > 192.168.1.254: ICMP echo request, id 5318, seq 3, length 64 13:18:38.793479 IP (tos 0x68, ttl 64, id 14495, offset 0, flags [none], proto ICMP (1), length 84) 192.168.1.254 > 192.168.1.145: ICMP echo reply, id 5318, seq 3, length 64 13:18:39.151282 IP6 (class 0x68, hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::5a98:35ff:fe57:e070 > ff02::1:ff6b:e9b4: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2001:818:d812:da00:8ae3:abff:fe6b:e9b4 source link-address option (1), length 8 (1): 58:98:35:57:a0:70 13:18:39.615612 IP (tos 0x0, ttl 64, id 2597, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.1.145 > 192.168.1.254: ICMP echo request, id 5318, seq 4, length 64 13:18:39.746981 IP (tos 0x68, ttl 64, id 14496, offset 0, flags [none], proto ICMP (1), length 84) 192.168.1.254 > 192.168.1.145: ICMP echo reply, id 5318, seq 4, length 64 --- 192.168.1.254 ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4008ms rtt min/avg/max/mdev = 2.793/67.810/178.934/73.108 ms root@ubuntu:~# killall tcpdump >> /dev/null 2>&1 9 packets captured 12 packets received by filter 0 packets dropped by kernel [1]+ Done tcpdump -n -i eth0.1 -v root@ubuntu:~# tcpdump -n -i eth0.2 -v & [1] 5320 root@ubuntu:~# ping -c5 -q -I eth0.2 192.168.1.254 PING 192.168.1.254 (192.168.1.254) from 192.168.1.146 eth0.2: 56(84) bytes of data. tcpdump: listening on eth0.2, link-type EN10MB (Ethernet), capture size 65535 bytes 13:18:41.536874 ARP, Ethernet (len 6), IPv4 (len 4), Reply 192.168.1.254 is-at 58:98:35:57:a0:70, length 46 13:18:41.536933 IP (tos 0x0, ttl 64, id 2599, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.1.146 > 192.168.1.254: ICMP echo request, id 5321, seq 1, length 64 13:18:41.539255 IP (tos 0x68, ttl 64, id 14507, offset 0, flags [none], proto ICMP (1), length 84) 192.168.1.254 > 192.168.1.146: ICMP echo reply, id 5321, seq 1, length 64 13:18:42.127715 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 192.168.1.87 tell 192.168.1.86, length 46 13:18:42.511725 IP (tos 0x0, ttl 64, id 2600, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.1.146 > 192.168.1.254: ICMP echo request, id 5321, seq 2, length 64 13:18:42.514385 IP (tos 0x68, ttl 64, id 14527, offset 0, flags [none], proto ICMP (1), length 84) 192.168.1.254 > 192.168.1.146: ICMP echo reply, id 5321, seq 2, length 64 13:18:42.743856 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 192.168.1.87 tell 192.168.1.86, length 46 13:18:43.511727 IP (tos 0x0, ttl 64, id 2601, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.1.146 > 192.168.1.254: ICMP echo request, id 5321, seq 3, length 64 13:18:43.513768 IP (tos 0x68, ttl 64, id 14528, offset 0, flags [none], proto ICMP (1), length 84) 192.168.1.254 > 192.168.1.146: ICMP echo reply, id 5321, seq 3, length 64 13:18:43.637598 IP (tos 0x0, ttl 128, id 23551, offset 0, flags [none], proto UDP (17), length 225) 192.168.1.86.17500 > 255.255.255.255.17500: UDP, length 197 13:18:43.641185 IP (tos 0x0, ttl 128, id 23552, offset 0, flags [none], proto UDP (17), length 225) 192.168.1.86.17500 > 192.168.1.255.17500: UDP, length 197 13:18:43.641201 IP (tos 0x0, ttl 128, id 23553, offset 0, flags [none], proto UDP (17), length 225) 192.168.1.86.17500 > 255.255.255.255.17500: UDP, length 197 13:18:43.743890 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 192.168.1.87 tell 192.168.1.86, length 46 13:18:44.510758 IP (tos 0x0, ttl 64, id 2602, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.1.146 > 192.168.1.254: ICMP echo request, id 5321, seq 4, length 64 13:18:44.512892 IP (tos 0x68, ttl 64, id 14538, offset 0, flags [none], proto ICMP (1), length 84) 192.168.1.254 > 192.168.1.146: ICMP echo reply, id 5321, seq 4, length 64 13:18:45.510794 IP (tos 0x0, ttl 64, id 2603, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.1.146 > 192.168.1.254: ICMP echo request, id 5321, seq 5, length 64 13:18:45.519701 IP (tos 0x68, ttl 64, id 14539, offset 0, flags [none], proto ICMP (1), length 84) 192.168.1.254 > 192.168.1.146: ICMP echo reply, id 5321, seq 5, length 64 13:18:49.287554 IP6 (class 0x68, hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::5a98:35ff:fe57:e070 > ff02::1:ff6b:e9b4: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2001:818:d812:da00:8ae3:abff:fe6b:e9b4 source link-address option (1), length 8 (1): 58:98:35:57:a0:70 13:18:50.013463 IP (tos 0x0, ttl 255, id 50737, offset 0, flags [DF], proto UDP (17), length 73) 192.168.1.146.5353 > 224.0.0.251.5353: 0 [2q] PTR (QM)? _ipps._tcp.local. PTR (QM)? _ipp._tcp.local. (45) 13:18:50.218874 IP6 (class 0x68, hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::5a98:35ff:fe57:e070 > ff02::1:ff6b:e9b4: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2001:818:d812:da00:8ae3:abff:fe6b:e9b4 source link-address option (1), length 8 (1): 58:98:35:57:a0:70 13:18:51.129961 IP6 (class 0x68, hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::5a98:35ff:fe57:e070 > ff02::1:ff6b:e9b4: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2001:818:d812:da00:8ae3:abff:fe6b:e9b4 source link-address option (1), length 8 (1): 58:98:35:57:a0:70 13:18:52.197074 IP6 (hlim 255, next-header UDP (17) payload length: 53) 2001:818:d812:da00:200:ff:fe00:22.5353 > ff02::fb.5353: [udp sum ok] 0 [2q] PTR (QM)? _ipps._tcp.local. PTR (QM)? _ipp._tcp.local. (45) 13:18:54.128240 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 192.168.1.87 tell 192.168.1.86, length 46 --- 192.168.1.254 ping statistics --- 5 packets transmitted, 0 received, 100% packet loss, time 4000ms root@ubuntu:~# killall tcpdump >> /dev/null 2>&1 13:18:54.657731 IP6 (class 0x68, hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::5a98:35ff:fe57:e070 > ff02::1:ff6b:e9b4: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2001:818:d812:da00:8ae3:abff:fe6b:e9b4 source link-address option (1), length 8 (1): 58:98:35:57:a0:70 13:18:54.743174 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 192.168.1.87 tell 192.168.1.86, length 46 25 packets captured 26 packets received by filter 0 packets dropped by kernel [1]+ Done tcpdump -n -i eth0.2 -v root@ubuntu:~# tcpdump -n -i eth0.3 icmp & [1] 5324 root@ubuntu:~# ping -c5 -q -I eth0.3 192.168.1.254 PING 192.168.1.254 (192.168.1.254) from 192.168.1.147 eth0.3: 56(84) bytes of data. tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0.3, link-type EN10MB (Ethernet), capture size 65535 bytes 13:18:56.373434 IP 192.168.1.147 > 192.168.1.254: ICMP echo request, id 5325, seq 1, length 64 13:18:57.372116 IP 192.168.1.147 > 192.168.1.254: ICMP echo request, id 5325, seq 2, length 64 13:18:57.381263 IP 192.168.1.254 > 192.168.1.147: ICMP echo reply, id 5325, seq 2, length 64 13:18:58.371141 IP 192.168.1.147 > 192.168.1.254: ICMP echo request, id 5325, seq 3, length 64 13:18:58.373275 IP 192.168.1.254 > 192.168.1.147: ICMP echo reply, id 5325, seq 3, length 64 13:18:59.371165 IP 192.168.1.147 > 192.168.1.254: ICMP echo request, id 5325, seq 4, length 64 13:18:59.373259 IP 192.168.1.254 > 192.168.1.147: ICMP echo reply, id 5325, seq 4, length 64 13:19:00.371211 IP 192.168.1.147 > 192.168.1.254: ICMP echo request, id 5325, seq 5, length 64 13:19:00.373278 IP 192.168.1.254 > 192.168.1.147: ICMP echo reply, id 5325, seq 5, length 64 --- 192.168.1.254 ping statistics --- 5 packets transmitted, 1 received, 80% packet loss, time 4001ms rtt min/avg/max/mdev = 13.666/13.666/13.666/0.000 ms root@ubuntu:~# killall tcpdump >> /dev/null 2>&1 9 packets captured 10 packets received by filter 0 packets dropped by kernel [1]+ Done tcpdump -n -i eth0.3 icmp root@ubuntu:~# arp -n Address HWtype HWaddress Flags Mask Iface 192.168.1.254 ether 58:98:35:57:a0:70 C eth0.1 192.168.1.254 ether 58:98:35:57:a0:70 C eth0.2 192.168.1.254 ether 58:98:35:57:a0:70 C eth0.3

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• Windows 8.1 IRQL_NOT_LESS_OR_EQUAL with Asus PCE-n53

  - by JArsenault89

  I saw the following question, and it is the exact same problem on my machine, I have tracked it to the ASUS PCE-n53 wireless card in my desktop. Does anyone know of a workaround? Windows 8.1 RTM installation crashes The adapter worked fine in windows 8... any ideas? EDIT: Crash Dump Analysis * Bugcheck Analysis * * IRQL_NOT_LESS_OR_EQUAL (a) An attempt was made to access a pageable (or completely invalid) address at an interrupt request level (IRQL) that is too high. This is usually caused by drivers using improper addresses. If a kernel debugger is available get the stack backtrace. Arguments: Arg1: 0000000000000000, memory referenced Arg2: 0000000000000002, IRQL Arg3: 0000000000000001, bitfield : bit 0 : value 0 = read operation, 1 = write operation bit 3 : value 0 = not an execute operation, 1 = execute operation (only on chips which support this level of status) Arg4: fffff801ef4f1316, address which referenced memory Debugging Details: WRITE_ADDRESS: 0000000000000000 CURRENT_IRQL: 2 FAULTING_IP: nt!KeReleaseSpinLock+16 fffff801`ef4f1316 f048832100 lock and qword ptr [rcx],0 DEFAULT_BUCKET_ID: WIN8_DRIVER_FAULT BUGCHECK_STR: AV PROCESS_NAME: System ANALYSIS_VERSION: 6.3.9600.16384 (debuggers(dbg).130821-1623) amd64fre TRAP_FRAME: ffffd00020d45550 -- (.trap 0xffffd00020d45550) NOTE: The trap frame does not contain all registers. Some register values may be zeroed or incorrect. rax=0000000000000001 rbx=0000000000000000 rcx=0000000000000000 rdx=0000000055920200 rsi=0000000000000000 rdi=0000000000000000 rip=fffff801ef4f1316 rsp=ffffd00020d456e0 rbp=ffffd00020d45768 r8=0000000055920222 r9=0000000035930000 r10=0000000055920222 r11=ffffd00020d456a8 r12=0000000000000000 r13=0000000000000000 r14=0000000000000000 r15=0000000000000000 iopl=0 nv up ei pl zr na po nc nt!KeReleaseSpinLock+0x16: fffff801ef4f1316 f048832100 lock and qword ptr [rcx],0 ds:0000000000000000=???????????????? Resetting default scope LOCK_ADDRESS: fffff801ef6da360 -- (!locks fffff801ef6da360) Resource @ nt!PiEngineLock (0xfffff801ef6da360) Exclusively owned Contention Count = 6 Threads: ffffe000010ff040-01<* 1 total locks, 1 locks currently held PNP_TRIAGE: Lock address : 0xfffff801ef6da360 Thread Count : 1 Thread address: 0xffffe000010ff040 Thread wait : 0x1fbe LAST_CONTROL_TRANSFER: from fffff801ef5647e9 to fffff801ef558ca0 STACK_TEXT: ffffd00020d45408 fffff801ef5647e9 : 000000000000000a 0000000000000000 0000000000000002 0000000000000001 : nt!KeBugCheckEx ffffd00020d45410 fffff801ef56303a : 0000000000000001 0000000000000000 ffff0c83e3e25300 ffffd00020d45550 : nt!KiBugCheckDispatch+0x69 ffffd00020d45550 fffff801ef4f1316 : 00000000000a5890 0000000000000001 0000000000000000 ffffe00004c00000 : nt!KiPageFault+0x23a ffffd00020d456e0 fffff80003b430ad : 00000000000afe80 ffffe00004c00000 00000000000a2f80 0000000035720000 : nt!KeReleaseSpinLock+0x16 ffffd00020d45710 fffff80003ac249f : ffffe00004c00000 00000000000000a8 ffffe00004c85050 0000000000000800 : netr28x+0x840ad ffffd00020d457b0 fffff80000b76475 : ffffd00020d459e8 ffffd00020d459f0 ffffe00004ac2006 ffffe00004ac21a0 : netr28x+0x349f ffffd00020d459a0 fffff80000baa248 : ffffe00004ac2eb8 0000000000000000 ffffe00000000000 ffffe00004ac21a0 : ndis!ndisMInvokeInitialize+0x39 ffffd00020d459e0 fffff80000b74784 : 0000000000000050 ffffe00004907ba0 0000000000000000 01cecbbc328e6cde : ndis!ndisMInitializeAdapter+0x4dc ffffd00020d46050 fffff80000b74d3d : 0000000000000050 ffffe0000443e770 ffffc00000951480 ffffe00004ac21a0 : ndis!ndisInitializeAdapter+0x60 ffffd00020d460a0 fffff80000b74c14 : ffffe00004ac21a0 ffffe00004ac2050 ffffe000047ec2a0 0000000000000000 : ndis!ndisPnPStartDevice+0x89 ffffd00020d460f0 fffff80000b87695 : ffffe00004ac21a0 ffffe00004ac21a0 ffffd00020d461b0 ffffe000047ec2a0 : ndis!ndisStartDeviceSynchronous+0x58 ffffd00020d46140 fffff80000b6a760 : ffffe000047ec2a0 ffffe00004ac21a0 0000000000000000 0000000000000000 : ndis!ndisPnPIrpStartDevice+0x13471 ffffd00020d46170 fffff8000032576c : ffffe00004b11501 ffffe00004b11570 0000000000000001 fffff80000325880 : ndis!ndisPnPDispatch+0x140 ffffd00020d461e0 fffff8000030b40a : ffffe000047ec2a0 0000000000000106 ffffd00020d462f0 ffffe00004b116c0 : Wdf01000!FxPkgFdo::PnpSendStartDeviceDownTheStackOverload+0xe8 ffffd00020d46250 fffff80000305942 : 0000000000000106 ffffd00020d462f0 0000000000000105 ffffd00020d464d0 : Wdf01000!FxPkgPnp::PnpEventInitStarting+0xa ffffd00020d46280 fffff80000305a5a : ffffe00004b116c8 0000000000000002 ffffe00004b11570 ffffe00004b11600 : Wdf01000!FxPkgPnp::PnpEnterNewState+0x102 ffffd00020d46310 fffff80000305bc4 : 0000000000000000 ffffd00020d46400 ffffe00004b116a0 0000000000000000 : Wdf01000!FxPkgPnp::PnpProcessEventInner+0xc2 ffffd00020d46390 fffff8000030c27a : 0000000000000000 ffffe00004b11570 0000000000000000 ffffe00004b11570 : Wdf01000!FxPkgPnp::PnpProcessEvent+0xe4 ffffd00020d46430 fffff80000300936 : ffffe00004b11570 ffffd00020d464c0 0000000000000000 ffffe00004a0e630 : Wdf01000!FxPkgPnp::_PnpStartDevice+0x1e ffffd00020d46460 fffff800002fba18 : ffffe000047ec2a0 ffffe000047ec2a0 0000000000000000 ffffe0000486f020 : Wdf01000!FxPkgPnp::Dispatch+0xd2 ffffd00020d464d0 fffff801ef838796 : 0000000000000000 fffff801ef6aa101 0000000000000000 ffffd000208aa180 : Wdf01000!FxDevice::DispatchWithLock+0x7d8 ffffd00020d465b0 fffff801ef4d5bad : ffffe000011dc3a0 ffffd00020d46659 0000000000000000 fffff801ef7f5ba4 : nt!PnpAsynchronousCall+0x102 ffffd00020d465f0 fffff801ef838e57 : ffffe000011db8d0 ffffe000011db8d0 ffffe00004a8d060 ffffc00002b11200 : nt!PnpStartDevice+0xc5 ffffd00020d466c0 fffff801ef838fe7 : ffffe000011db8d0 ffffe000011db8d0 0000000000000000 ffffe000011db8d0 : nt!PnpStartDeviceNode+0x147 ffffd00020d46790 fffff801ef7fd19e : ffffe000011db8d0 0000000000000001 0000000000000001 ffffe00000000001 : nt!PipProcessStartPhase1+0x53 ffffd00020d467d0 fffff801ef897b17 : ffffe000011db8d0 0000000000000001 0000000000000000 fffff801ef7ef7b2 : nt!PipProcessDevNodeTree+0x3ce ffffd00020d46a50 fffff801ef4f5033 : 0000000100000003 0000000000000000 0000000000000000 0000000000000000 : nt!PiRestartDevice+0xaf ffffd00020d46aa0 fffff801ef44565d : fffff801ef4f4c90 ffffd00020d46bd0 0000000000000000 ffffe00004a10170 : nt!PnpDeviceActionWorker+0x3a3 ffffd00020d46b50 fffff801ef4eec80 : 0000000000000000 ffffe000010ff040 ffffe000010ff040 ffffe0000035c900 : nt!ExpWorkerThread+0x2b5 ffffd00020d46c00 fffff801ef55f2c6 : ffffd00020472180 ffffe000010ff040 ffffe00000608040 ffffc00000002710 : nt!PspSystemThreadStartup+0x58 ffffd00020d46c60 0000000000000000 : ffffd00020d47000 ffffd00020d41000 0000000000000000 0000000000000000 : nt!KiStartSystemThread+0x16 STACK_COMMAND: kb FOLLOWUP_IP: netr28x+840ad fffff800`03b430ad 4533e4 xor r12d,r12d SYMBOL_STACK_INDEX: 4 SYMBOL_NAME: netr28x+840ad FOLLOWUP_NAME: MachineOwner MODULE_NAME: netr28x IMAGE_NAME: netr28x.sys DEBUG_FLR_IMAGE_TIMESTAMP: 51de7a8d FAILURE_BUCKET_ID: AV_netr28x+840ad BUCKET_ID: AV_netr28x+840ad ANALYSIS_SOURCE: KM FAILURE_ID_HASH_STRING: km:av_netr28x+840ad FAILURE_ID_HASH: {a1f86ced-f566-ac23-afeb-1aa88ea5ab8f} Followup: MachineOwner

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• Excessive CPU Utilization for Bind 9.8.1 `named` processes

  - by justinzane

  I just noticed that named is eating vast amounts of CPU time for a very small network with only a few domains. Can someone help me determine what is misconfigured, please? Or how to debug this. top top - 14:13:08 up 25 days, 14:16, 1 user, load average: 1.04, 1.04, 1.05 Tasks: 149 total, 1 running, 148 sleeping, 0 stopped, 0 zombie %Cpu(s): 17.3 us, 4.3 sy, 0.0 ni, 78.2 id, 0.1 wa, 0.0 hi, 0.0 si, 0.0 st KiB Mem: 2042776 total, 1347916 used, 694860 free, 249396 buffers KiB Swap: 3976080 total, 30552 used, 3945528 free, 574164 cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 17445 bind 20 0 244m 42m 3124 S 99.4 2.2 2345:03 named rndc stats +++ Statistics Dump +++ (1352931389) ++ Incoming Requests ++ 65869 QUERY ++ Incoming Queries ++ 31809 A 241 NS 3 CNAME 27455 SOA 276 PTR 123 MX 462 TXT 5400 AAAA 7 A6 1 DS 14 DNSKEY 15 SPF 55 AXFR 8 ANY ++ Outgoing Queries ++ [View: internal] 22206 A 509 NS 10 SOA 25 PTR 12 MX 524 TXT 4851 AAAA 62 DNSKEY 19 SPF 3157 DLV [View: external] 87 A 2 NS 80 AAAA 120 DNSKEY 7 DLV [View: _bind] ++ Name Server Statistics ++ 65869 IPv4 requests received 27670 requests with EDNS(0) received 112 TCP requests received 65652 responses sent 20 truncated responses sent 27670 responses with EDNS(0) sent 62920 queries resulted in successful answer 37117 queries resulted in authoritative answer 28482 queries resulted in non authoritative answer 7 queries resulted in referral answer 591 queries resulted in nxrrset 53 queries resulted in SERVFAIL 2081 queries resulted in NXDOMAIN 14530 queries caused recursion 162 duplicate queries received 55 requested transfers completed ++ Zone Maintenance Statistics ++ 109536 IPv4 notifies sent ++ Resolver Statistics ++ [Common] [View: internal] 29362 IPv4 queries sent 2013 IPv6 queries sent 28531 IPv4 responses received 4209 NXDOMAIN received 6 SERVFAIL received 31 FORMERR received 32 EDNS(0) query failures 3359 query retries 836 query timeouts 5348 IPv4 NS address fetches 3271 IPv6 NS address fetches 83 IPv4 NS address fetch failed 2779 IPv6 NS address fetch failed 17421 DNSSEC validation attempted 12731 DNSSEC validation succeeded 4690 DNSSEC NX validation succeeded 21104 queries with RTT 10-100ms 7418 queries with RTT 100-500ms 3 queries with RTT 500-800ms 1 queries with RTT 800-1600ms [View: external] 192 IPv4 queries sent 104 IPv6 queries sent 192 IPv4 responses received 2 NXDOMAIN received 104 query retries 44 IPv4 NS address fetches 44 IPv6 NS address fetches 1 IPv4 NS address fetch failed 1 IPv6 NS address fetch failed 4 DNSSEC validation attempted 3 DNSSEC validation succeeded 1 DNSSEC NX validation succeeded 152 queries with RTT 10-100ms 40 queries with RTT 100-500ms [View: _bind] ++ Cache DB RRsets ++ [View: internal (Cache: internal)] 2007 A 652 NS 131 CNAME 1 MX 32 TXT 421 AAAA 28 DS 244 RRSIG 110 NSEC 3 DNSKEY 2 !A 2 !TXT 89 !AAAA 2 !SPF 14 !DLV 148 NXDOMAIN [View: external (Cache: external)] 55 A 12 NS 34 AAAA 2 DS 10 RRSIG 1 DNSKEY [View: _bind (Cache: _bind)] ++ Socket I/O Statistics ++ 82958 UDP/IPv4 sockets opened 2118 UDP/IPv6 sockets opened 4 TCP/IPv4 sockets opened 1 TCP/IPv6 sockets opened 82956 UDP/IPv4 sockets closed 2117 UDP/IPv6 sockets closed 58 TCP/IPv4 sockets closed 15 UDP/IPv4 socket bind failures 2117 UDP/IPv6 socket connect failures 29554 UDP/IPv4 connections established 59 TCP/IPv4 connections accepted 2117 UDP/IPv6 send errors 5 UDP/IPv4 recv errors ++ Per Zone Query Statistics ++ --- Statistics Dump --- (1352931389)

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• Mail server configuration

  - by Rashid Iqbal

  I want to configure mail server at my office. for this purpose I purchase on live IP and ask the ISP to set a ptr against that Live IP. in response I get the email from ISP in which three entries listed. as shown below: Live IP: xxx.xxx.xx.xxx ns1.xxx.net.xx ns2.xxx.net.xx now please help to setup at my end.

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• OpenLDAP with StartTLS broken on Debian Lenny

  - by mr.zog

  I'm trying to get OpenLDAP on Lenny to work with StartTLS. I have a Fedora 13 machine which I'm using as a client for testing. So far the Fedora client is ignoring the 'host' directive in /etc/ldap.conf when I try to connect using ldapsearch. The client wants to connect to 127.0.0.1:389 even if I specify -H ldaps://server.name on when using ldapsearch. /etc/ldap.conf on the client machine is in mode 444. But even when I try connecting locally from an ssh session, I see errors like this: ldap_sasl_interactive_bind_s: Can't contact LDAP server (-1) Someone hit me with a cluebat, plz. Update: you must use ~/.ldaprc for settings such as 'host'. Also, I just used nmap against the ldap server and it showed 636 and 389 in an open state. Here's what prints to screen when I try to connect with, ldapsearch -ZZ –x '(objectclass=*)'+ -d -1 ldap_create ldap_extended_operation_s ldap_extended_operation ldap_send_initial_request ldap_new_connection 1 1 0 ldap_int_open_connection ldap_connect_to_host: TCP 192.168.10.41:636 ldap_new_socket: 3 ldap_prepare_socket: 3 ldap_connect_to_host: Trying 192.168.10.41:636 ldap_pvt_connect: fd: 3 tm: -1 async: 0 ldap_open_defconn: successful ldap_send_server_request ber_scanf fmt ({it) ber: ber_dump: buf=0x9bdbdb8 ptr=0x9bdbdb8 end=0x9bdbdd7 len=31 0000: 30 1d 02 01 01 77 18 80 16 31 2e 33 2e 36 2e 31 0....w...1.3.6.1 0010: 2e 34 2e 31 2e 31 34 36 36 2e 32 30 30 33 37 .4.1.1466.20037 ber_scanf fmt ({) ber: ber_dump: buf=0x9bdbdb8 ptr=0x9bdbdbd end=0x9bdbdd7 len=26 0000: 77 18 80 16 31 2e 33 2e 36 2e 31 2e 34 2e 31 2e w...1.3.6.1.4.1. 0010: 31 34 36 36 2e 32 30 30 33 37 1466.20037 ber_flush2: 31 bytes to sd 3 0000: 30 1d 02 01 01 77 18 80 16 31 2e 33 2e 36 2e 31 0....w...1.3.6.1 0010: 2e 34 2e 31 2e 31 34 36 36 2e 32 30 30 33 37 .4.1.1466.20037 ldap_write: want=31, written=31 0000: 30 1d 02 01 01 77 18 80 16 31 2e 33 2e 36 2e 31 0....w...1.3.6.1 0010: 2e 34 2e 31 2e 31 34 36 36 2e 32 30 30 33 37 .4.1.1466.20037 ldap_result ld 0x9bd3050 msgid 1 wait4msg ld 0x9bd3050 msgid 1 (infinite timeout) wait4msg continue ld 0x9bd3050 msgid 1 all 1 ** ld 0x9bd3050 Connections: * host: 192.168.10.41 port: 636 (default) refcnt: 2 status: Connected last used: Sun Jun 6 12:54:05 2010 ** ld 0x9bd3050 Outstanding Requests: * msgid 1, origid 1, status InProgress outstanding referrals 0, parent count 0 ld 0x9bd3050 request count 1 (abandoned 0) ** ld 0x9bd3050 Response Queue: Empty ld 0x9bd3050 response count 0 ldap_chkResponseList ld 0x9bd3050 msgid 1 all 1 ldap_chkResponseList returns ld 0x9bd3050 NULL ldap_int_select read1msg: ld 0x9bd3050 msgid 1 all 1 ber_get_next ldap_read: want=8, got=0 ber_get_next failed. ldap_err2string ldap_start_tls: Can't contact LDAP server (-1)

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• Why can host and nslookup resolve a name but dig cannot?

  - by musashiXXX

  Can anyone tell me why this is happening? I can resolve a hostname using host and/or nslookup but forward lookups do not work with dig; reverse lookups do: musashixxx@box:~$ host someserver someserver.somenet.internal has address 192.168.0.252 musashixxx@box:~$ host 192.168.0.252 252.0.168.192.in-addr.arpa domain name pointer someserver.somenet.internal. musashixxx@box:~$ nslookup someserver Server: 192.168.0.253 Address: 192.168.0.253#53 Name: someserver.somenet.internal Address: 192.168.0.252 musashixxx@box:~$ nslookup 192.168.0.252 Server: 192.168.0.253 Address: 192.168.0.253#53 252.0.168.192.in-addr.arpa name = someserver.somenet.internal. musashixxx@box:~$ dig someserver ; <<>> DiG 9.8.1-P1 <<>> someserver ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 55306 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;someserver. IN A ;; Query time: 0 msec ;; SERVER: 192.168.0.253#53(192.168.0.253) ;; WHEN: Wed Oct 3 15:47:38 2012 ;; MSG SIZE rcvd: 27 musashixxx@box:~$ dig -x 192.168.0.252 ; <<>> DiG 9.8.1-P1 <<>> -x 192.168.0.252 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 28126 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;252.0.168.192.in-addr.arpa. IN PTR ;; ANSWER SECTION: 252.0.168.192.in-addr.arpa. 3600 IN PTR someserver.somenet.internal. ;; Query time: 0 msec ;; SERVER: 192.168.0.253#53(192.168.0.253) ;; WHEN: Wed Oct 3 15:49:11 2012 ;; MSG SIZE rcvd: 86 Here's what my resolv.conf looks like: nameserver 192.168.0.253 search somenet.internal Is this behavior normal? Any thoughts?

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• DNS works only with ip but does not work with NS CentOS + Bind9

  - by Borislav Yordanov

  I am having a headache with DNS. Lets say my public IP is 1.2.3.4, my local IP is 192.168.0.10 and my domain is example.com I am running CentOS on a virtual machine (Parallels Desktop for Mac) with a LAN card reserved for it, so it gets Ip directly from the router. I have ports 80,443,53 forwarded to 192.168.0.10. Both Mac OS and CentOs firewalls are Off. The strange is when I type dig @1.2.3.4 example.com from my other PC I get: ; <<>> DiG 9.8.3-P1 <<>> @1.2.3.4 example.com ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 16941 ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2 ;; WARNING: recursion requested but not available ;; QUESTION SECTION: ;example.com. IN A ;; ANSWER SECTION: example.com. 86400 IN A 1.2.3.4 ;; AUTHORITY SECTION: example.com. 86400 IN NS ns2.example.com. example.com. 86400 IN NS ns1.example.com. ;; ADDITIONAL SECTION: ns1.example.com. 86400 IN A 1.2.3.4 ns2.example.com. 86400 IN A 1.2.3.4 ;; Query time: 8 msec ;; SERVER: 1.2.3.4#53(1.2.3.4) ;; WHEN: Sat Nov 2 09:37:36 2013 ;; MSG SIZE rcvd: 109 but when i type: dig @ns1.example.com example.com it waits a few seconds and returns dig: couldn't get address for 'ns1.dsht.in': not found This is my config file: /etc/named.conf options { listen-on-v6 { none; }; directory"/var/named"; dump-file"/var/named/data/cache_dump.db"; statistics-file"/var/named/data/named_stats.txt"; memstatistics-file"/var/named/data/named_mem_stats.txt"; allow-query{ localhost; 192.168.0.0/24; }; allow-transfer { localhost; 192.168.0.0/24; }; recursion yes; dnssec-enable yes; dnssec-validation yes; dnssec-lookaside auto; bindkeys-file "/etc/named.iscdlv.key"; managed-keys-directory "/var/named/dynamic"; }; logging { channel default_debug { file "data/named.run"; severity dynamic; }; }; # change all from here view "internal" { match-clients { localhost; 192.168.0.0/24; }; zone "." IN { type hint; file "named.ca"; }; zone "example.com" IN { type master; file "example.com.zone"; allow-update { none; }; }; zone "0.168.192.in-addr.arpa" IN { type master; file "0.168.192.in-addr.arpa"; allow-update { none; }; }; include "/etc/named.rfc1912.zones"; include "/etc/named.root.key"; }; view "external" { match-clients { any; }; allow-query { any; }; recursion no; zone "example.com" IN { type master; file "example.com.zone"; allow-update { none; }; }; zone "4.3.2.1.in-addr.arpa" IN { type master; file "4.3.2.1.in-addr.arpa"; allow-update { none; }; }; }; /var/named/exmaple.com.zone $TTL 86400 @ IN SOA ns1.example.com. host.example.com. ( 2013042201 ;Serial 3600 ;Refresh 1800 ;Retry 604800 ;Expire 86400 ;Minimum TTL ) ; Specify our two nameservers IN NS ns1.example.com. IN NS ns2.example.com. ; Resolve nameserver hostnames to IP, replace with your two droplet IP addresses. ns1 IN A 1.2.3.4 ns2 IN A 1.2.3.4 ; Define hostname -> IP pairs which you wish to resolve @ IN A 1.2.3.4 IN A 1.2.3.4 www IN A 1.2.3.4 server2 IN A 192.168.0.2 * IN A 1.2.3.4 /var/named/4.3.2.1.in-addr.arpa $TTL 2d ; 172800 seconds $ORIGIN 4.3.2.1.IN-ADDR.ARPA. @ IN SOA ns1.example.com. host.example.com. ( 2013010304 ; serial number 3h ; refresh 15m ; update retry 3w ; expiry 3h ; nx = nxdomain ttl ) IN NS ns1.example.com. IN NS ns2.example.com. IN PTR example.com. ; etc /var/named/0.168.192.in-addr.arpa $TTL 2d ; 172800 seconds $ORIGIN 0.168.192.IN-ADDR.ARPA. @ IN SOA ns1.example.com. host.example.com. ( 2013010304 ; serial number 3h ; refresh 15m ; update retry 3w ; expiry 3h ; nx = nxdomain ttl ) IN NS ns1.example.com. IN NS ns2.example.com. 10 IN PTR example.com. 2 IN PTR server2.example.com ; etc I will be very glad if someone can help me. Thank you in advance

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• 220 **** smtp banner while telnet mail server on a Windows XP , hmail server linksys WRT120 n router

  - by panindra

  we have setup server ,mail server using HMail server and oyr RDNS / PTr is also solved but when do smtp test from mxtoolbox.com we are getting 220 *** kind of message. our server configuration : OS : windows XP Mail Server : Hmail Server IP : Staic IP Router : Cisco LInksys WRT12N is this some thing related to router or what .. becouse if telnet the smtp in the same PC where hmailerver installed we are getting 220 domain.com as message . which is fine for us but when test fromoutside the rotuer we are getting 220 * how to fix this

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• ASP.NET MVC 3: Razor’s @: and <text> syntax

  - by ScottGu

  This is another in a series of posts I’m doing that cover some of the new ASP.NET MVC 3 features: New @model keyword in Razor (Oct 19th) Layouts with Razor (Oct 22nd) Server-Side Comments with Razor (Nov 12th) Razor’s @: and <text> syntax (today) In today’s post I’m going to discuss two useful syntactical features of the new Razor view-engine – the @: and <text> syntax support. Fluid Coding with Razor ASP.NET MVC 3 ships with a new view-engine option called “Razor” (in addition to the existing .aspx view engine).  You can learn more about Razor, why we are introducing it, and the syntax it supports from my Introducing Razor blog post.  Razor minimizes the number of characters and keystrokes required when writing a view template, and enables a fast, fluid coding workflow. Unlike most template syntaxes, you do not need to interrupt your coding to explicitly denote the start and end of server blocks within your HTML. The Razor parser is smart enough to infer this from your code. This enables a compact and expressive syntax which is clean, fast and fun to type. For example, the Razor snippet below can be used to iterate a list of products: When run, it generates output like:   One of the techniques that Razor uses to implicitly identify when a code block ends is to look for tag/element content to denote the beginning of a content region.  For example, in the code snippet above Razor automatically treated the inner <li></li> block within our foreach loop as an HTML content block because it saw the opening <li> tag sequence and knew that it couldn’t be valid C#.  This particular technique – using tags to identify content blocks within code – is one of the key ingredients that makes Razor so clean and productive with scenarios involving HTML creation. Using @: to explicitly indicate the start of content Not all content container blocks start with a tag element tag, though, and there are scenarios where the Razor parser can’t implicitly detect a content block. Razor addresses this by enabling you to explicitly indicate the beginning of a line of content by using the @: character sequence within a code block.  The @: sequence indicates that the line of content that follows should be treated as a content block: As a more practical example, the below snippet demonstrates how we could output a “(Out of Stock!)” message next to our product name if the product is out of stock: Because I am not wrapping the (Out of Stock!) message in an HTML tag element, Razor can’t implicitly determine that the content within the @if block is the start of a content block.  We are using the @: character sequence to explicitly indicate that this line within our code block should be treated as content. Using Code Nuggets within @: content blocks In addition to outputting static content, you can also have code nuggets embedded within a content block that is initiated using a @: character sequence.  For example, we have two @: sequences in the code snippet below: Notice how within the second @: sequence we are emitting the number of units left within the content block (e.g. - “(Only 3 left!”). We are doing this by embedding a @p.UnitsInStock code nugget within the line of content. Multiple Lines of Content Razor makes it easy to have multiple lines of content wrapped in an HTML element.  For example, below the inner content of our @if container is wrapped in an HTML <p> element – which will cause Razor to treat it as content: For scenarios where the multiple lines of content are not wrapped by an outer HTML element, you can use multiple @: sequences: Alternatively, Razor also allows you to use a <text> element to explicitly identify content: The <text> tag is an element that is treated specially by Razor. It causes Razor to interpret the inner contents of the <text> block as content, and to not render the containing <text> tag element (meaning only the inner contents of the <text> element will be rendered – the tag itself will not).  This makes it convenient when you want to render multi-line content blocks that are not wrapped by an HTML element.  The <text> element can also optionally be used to denote single-lines of content, if you prefer it to the more concise @: sequence: The above code will render the same output as the @: version we looked at earlier.  Razor will automatically omit the <text> wrapping element from the output and just render the content within it.  Summary Razor enables a clean and concise templating syntax that enables a very fluid coding workflow.  Razor’s smart detection of <tag> elements to identify the beginning of content regions is one of the reasons that the Razor approach works so well with HTML generation scenarios, and it enables you to avoid having to explicitly mark the beginning/ending of content regions in about 95% of if/else and foreach scenarios. Razor’s @: and <text> syntax can then be used for scenarios where you want to avoid using an HTML element within a code container block, and need to more explicitly denote a content region. Hope this helps, Scott P.S. In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu

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• Geocaching - World wide treasure hunt

  I'm not quite sure how I came across this topic but actually I find it absolutely interesting, challenging and most of all a great fun for the family and friends. The interesting part is for sure that you can follow other peoples treasures and their preferred locations where a cache might be hidden. Of course, it wont be easy to find a cache after all. Sometimes there are even 'mystery caches' which have either riddles, further instructions or little brain games for you in order to find the actual cache - that's the challenge. And last but not least, those caches are hidden outdoor. A great experience to explore nature either on your own, or your family especially with children, or as a treasure hunting pack with a couple of friends. What is geocaching? It's a high-tech outdoor treasure hunting game that's a great way to explore the world with friends, family or on your own. Participants use GPS-enabled devices to locate hidden containers called geocaches. There are over one million geocaches hidden around the world today, waiting for you to find them. Visit Geocaching.com to search for geocaches near you.(Source: Referral Email of geocaching.com) Checkout the Geocaching 101 for further details and information. They also provide a video channel on YouTube. Which equipment do I need? Any GPS-enabled device is sufficient to go onto the hunt. I'm going to start our geocaching experience equipped with my Samsung Galaxy Tab. Additionally, I installed a geocaching.com client called c:geo that hopefully assists me soon. Combined with a map app like Google Maps and a nice Compass app you should be fully equipped and ready to go. I guess, that even a car navigation system is perfect for that task. Later on, with more experience and demand for technology (or precision) it might be interesting to opt-in for a pure GPS device, like a Garmin or any other brand on the market. {loadposition content_adsense} What is a geocache and what does it contain? In its simplest form, a cache always contains a logbook or logsheet for you to log your find. Larger caches may contain a logbook and any number of items. These items turn the adventure into a true treasure hunt. You never know what the cache owner or visitors to the cache may have left for you to enjoy. Remember, if you take something, leave something of equal or greater value in return. It is recommended that items in a cache be individually packaged in a clear, zipped plastic bag to protect them from the elements. Finding your first geocache Well, first you have to have interest to pick up the challenge. Then you have to check out the Geocache directory on geocaching.com. They have recommendations for beginner's caches but you are free to choose any. Actually, we have a Mystery Cache very close to our base, and I guess that we are going for that one on our first trip. Anyway, there is a very informative guide on the website which should answer all your questions about starting your new outdoor adventure. For sure, it's going to be rewarding. Team up with friends and family Especially as a beginner there might be misunderstandings in handling the GPS coordinates, the compass, or the map, and even finding the container at the documented position isn't easy in the first place. Luckily, there are logbook reports online from other hunters, and most of the time there are even 'spoiler' images available. But also bear in mind, that a geocache might have been removed or is lost due to unconscious people or whatever other reasons. Don't be disappointed in case that you can't find anything... There be nothing anymore. A general recommendation in this case would be to replace the missing container with a new one, and give feedback to the original owner about the state of that particular location. After all, it's about fun and active participation in a world-wide community. Geocaches in Mauritius? Yes, there are currently about 45 geocaches spread all over the island, and even a single in Rodriguez - that's gonna be a tough one. Hopefully, we will get increasing numbers as Geocaching.com allows, no better, even encourages you to hide new containers at your locations of choice. I think this is going to be real fun for us during the upcoming weeks and months. Especially, when we are travelling to other countries and transfer so-called trackable items between geocaches. On my first impression, Geocaching.com seems to be very mature, open and community-oriented. There are literally hundreds of thousands geocache 'hunters' all over the world. And usually finding a container remote from your home is very rewarding. I'll keep you updated in these matters during the next months to come...

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• [Windows 8] Application bar popup button

  - by Benjamin Roux

  Here is a small control to create an application bar button which will display a content in a popup when the button is clicked. Visually it gives this So how to create this? First you have to use the AppBarPopupButton control below.   namespace Indeed.Controls { public class AppBarPopupButton : Button { public FrameworkElement PopupContent { get { return (FrameworkElement)GetValue(PopupContentProperty); } set { SetValue(PopupContentProperty, value); } } public static readonly DependencyProperty PopupContentProperty = DependencyProperty.Register("PopupContent", typeof(FrameworkElement), typeof(AppBarPopupButton), new PropertyMetadata(null, (o, e) => (o as AppBarPopupButton).CreatePopup())); private Popup popup; private SerialDisposable sizeChanged = new SerialDisposable(); protected override void OnTapped(Windows.UI.Xaml.Input.TappedRoutedEventArgs e) { base.OnTapped(e); if (popup != null) { var transform = this.TransformToVisual(Window.Current.Content); var offset = transform.TransformPoint(default(Point)); sizeChanged.Disposable = PopupContent.ObserveSizeChanged().Do(_ => popup.VerticalOffset = offset.Y - (PopupContent.ActualHeight + 20)).Subscribe(); popup.HorizontalOffset = offset.X + 24; popup.DataContext = this.DataContext; popup.IsOpen = true; } } private void CreatePopup() { popup = new Popup { IsLightDismissEnabled = true }; popup.Closed += (o, e) => this.GetParentOfType<AppBar>().IsOpen = false; popup.ChildTransitions = new Windows.UI.Xaml.Media.Animation.TransitionCollection(); popup.ChildTransitions.Add(new Windows.UI.Xaml.Media.Animation.PopupThemeTransition()); var container = new Grid(); container.Children.Add(PopupContent); popup.Child = container; } } } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } The ObserveSizeChanged method is just an extension method which observe the SizeChanged event (using Reactive Extensions - Rx-Metro package in Nuget). If you’re not familiar with Rx, you can replace this line (and the SerialDisposable stuff) by a simple subscription to the SizeChanged event (using +=) but don’t forget to unsubscribe to it ! public static IObservable<Unit> ObserveSizeChanged(this FrameworkElement element) { return Observable.FromEventPattern<SizeChangedEventHandler, SizeChangedEventArgs>( o => element.SizeChanged += o, o => element.SizeChanged -= o) .Select(_ => Unit.Default); } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } The GetParentOfType extension method just retrieve the first parent of type (it’s a common extension method that every Windows 8 developer should have created !). You can of course tweak to control (for example if you want to center the content to the button or anything else) to fit your needs. How to use this control? It’s very simple, in an AppBar control just add it and define the PopupContent property. <ic:AppBarPopupButton Style="{StaticResource RefreshAppBarButtonStyle}" HorizontalAlignment="Left"> <ic:AppBarPopupButton.PopupContent> <Grid> [...] </Grid> </ic:AppBarPopupButton.PopupContent> </ic:AppBarPopupButton> .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } When the button is clicked the popup is displayed. When the popup is closed, the app bar is closed too. I hope this will help you !

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• Navigation in a #WP7 application with MVVM Light

  - by Laurent Bugnion

  In MVVM applications, it can be a bit of a challenge to send instructions to the view (for example a page) from a viewmodel. Thankfully, we have good tools at our disposal to help with that. In his excellent series “MVVM Light Toolkit soup to nuts”, Jesse Liberty proposes one approach using the MVVM Light messaging infrastructure. While this works fine, I would like to show here another approach using what I call a “view service”, i.e. an abstracted service that is invoked from the viewmodel, and implemented on the view. Multiple kinds of view services In fact, I use view services quite often, and even started standardizing them for the Windows Phone 7 applications I work on. If there is interest, I will be happy to show other such view services, for example Animation services, responsible to start/stop animations on the view. Dialog service, in charge of displaying messages to the user and gathering feedback. Navigation service, in charge of navigating to a given page directly from the viewmodel. In this article, I will concentrate on the navigation service. The INavigationService interface In most WP7 apps, the navigation service is used in quite a straightforward way. We want to: Navigate to a given URI. Go back. Be notified when a navigation is taking place, and be able to cancel. The INavigationService interface is quite simple indeed: public interface INavigationService { event NavigatingCancelEventHandler Navigating; void NavigateTo(Uri pageUri); void GoBack(); } Obviously, this interface can be extended if necessary, but in most of the apps I worked on, I found that this covers my needs. The NavigationService class It is possible to nicely pack the navigation service into its own class. To do this, we need to remember that all the PhoneApplicationPage instances use the same instance of the navigation service, exposed through their NavigationService property. In fact, in a WP7 application, it is the main frame (RootFrame, of type PhoneApplicationFrame) that is responsible for this task. So, our implementation of the NavigationService class can leverage this. First the class will grab the PhoneApplicationFrame and store a reference to it. Also, it registers a handler for the Navigating event, and forwards the event to the listening viewmodels (if any). Then, the NavigateTo and the GoBack methods are implemented. They are quite simple, because they are in fact just a gateway to the PhoneApplicationFrame. The whole class is as follows: public class NavigationService : INavigationService { private PhoneApplicationFrame _mainFrame; public event NavigatingCancelEventHandler Navigating; public void NavigateTo(Uri pageUri) { if (EnsureMainFrame()) { _mainFrame.Navigate(pageUri); } } public void GoBack() { if (EnsureMainFrame() && _mainFrame.CanGoBack) { _mainFrame.GoBack(); } } private bool EnsureMainFrame() { if (_mainFrame != null) { return true; } _mainFrame = Application.Current.RootVisual as PhoneApplicationFrame; if (_mainFrame != null) { // Could be null if the app runs inside a design tool _mainFrame.Navigating += (s, e) => { if (Navigating != null) { Navigating(s, e); } }; return true; } return false; } } Exposing URIs I find that it is a good practice to expose each page’s URI as a constant. In MVVM Light applications, a good place to do that is the ViewModelLocator, which already acts like a central point of setup for the views and their viewmodels. Note that in some cases, it is necessary to expose the URL as a string, for instance when a query string needs to be passed to the view. So for example we could have: public static readonly Uri MainPageUri = new Uri("/MainPage.xaml", UriKind.Relative); public const string AnotherPageUrl = "/AnotherPage.xaml?param1={0}&param2={1}"; Creating and using the NavigationService Normally, we only need one instance of the NavigationService class. In cases where you use an IOC container, it is easy to simply register a singleton instance. For example, I am using a modified version of a super simple IOC container, and so I can register the navigation service as follows: SimpleIoc.Register<INavigationService, NavigationService>(); Then, it can be resolved where needed with: SimpleIoc.Resolve<INavigationService>(); Or (more frequently), I simply declare a parameter on the viewmodel constructor of type INavigationService and let the IOC container do its magic and inject the instance of the NavigationService when the viewmodel is created. On supported platforms (for example Silverlight 4), it is also possible to use MEF. Or, of course, we can simply instantiate the NavigationService in the ViewModelLocator, and pass this instance as a parameter of the viewmodels’ constructor, injected as a property, etc… Once the instance has been passed to the viewmodel, it can be used, for example with: NavigationService.NavigateTo(ViewModelLocator.ComparisonPageUri); Testing Thanks to the INavigationService interface, navigation can be mocked and tested when the viewmodel is put under unit test. Simply implement and inject a mock class, and assert that the methods are called as they should by the viewmodel. Conclusion As usual, there are multiple ways to code a solution answering your needs. I find that view services are a really neat way to delegate view-specific responsibilities such as animation, dialogs and of course navigation to other classes through an abstracted interface. In some cases, such as the NavigationService class exposed here, it is even possible to standardize the implementation and pack it in a class library for reuse. I hope that this sample is useful! Happy coding. Laurent   Laurent Bugnion (GalaSoft) Subscribe | Twitter | Facebook | Flickr | LinkedIn

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• C++ property system interface for game editors (reflection system)

  - by Cristopher Ismael Sosa Abarca

  I have designed an reusable game engine for an project, and their functionality is like this: Is a completely scripted game engine instead of the usual scripting languages as Lua or Python, this uses Runtime-Compiled C++, and an modified version of Cistron (an component-based programming framework).to be compatible with Runtime-Compiled C++ and so on. Using the typical GameObject and Component classes of the Component-based design pattern, is serializable via JSON, BSON or Binary useful for selecting which objects will be loaded the next time. The main problem: We want to use our custom GameObjects and their components properties in our level editor, before used hardcoded functions to access GameObject base class virtual functions from the derived ones, if do you want to modify an property specifically from that class you need inside into the code, this situation happens too with the derived classes of Component class, in little projects there's no problem but for larger projects becomes tedious, lengthy and error-prone. I've researched a lot to find a solution without luck, i tried with the Ogitor's property system (since our engine is Ogre-based) but we find it inappropiate for the component-based design and it's limited only for the Ogre classes and can lead to performance overhead, and we tried some code we find in the Internet we tested it and worked a little but we considered the macro and lambda abuse too horrible take a look (some code omitted): IWE_IMPLEMENT_PROP_BEGIN(CBaseEntity) IWE_PROP_LEVEL_BEGIN("Editor"); IWE_PROP_INT_S("Id", "Internal id", m_nEntID, [](int n) {}, true); IWE_PROP_LEVEL_END(); IWE_PROP_LEVEL_BEGIN("Entity"); IWE_PROP_STRING_S("Mesh", "Mesh used for this entity", m_pModelName, [pInst](const std::string& sModelName) { pInst->m_stackMemUndoType.push(ENT_MEM_MESH); pInst->m_stackMemUndoStr.push(pInst->getModelName()); pInst->setModel(sModelName, false); pInst->saveState(); }, false); IWE_PROP_VECTOR3_S("Position", m_vecPosition, [pInst](float fX, float fY, float fZ) { pInst->m_stackMemUndoType.push(ENT_MEM_POSITION); pInst->m_stackMemUndoVec3.push(pInst->getPosition()); pInst->saveState(); pInst->m_vecPosition.Get()[0] = fX; pInst->m_vecPosition.Get()[1] = fY; pInst->m_vecPosition.Get()[2] = fZ; pInst->setPosition(pInst->m_vecPosition); }, false); IWE_PROP_QUATERNION_S("Orientation (Quat)", m_quatOrientation, [pInst](float fW, float fX, float fY, float fZ) { pInst->m_stackMemUndoType.push(ENT_MEM_ROTATE); pInst->m_stackMemUndoQuat.push(pInst->getOrientation()); pInst->saveState(); pInst->m_quatOrientation.Get()[0] = fW; pInst->m_quatOrientation.Get()[1] = fX; pInst->m_quatOrientation.Get()[2] = fY; pInst->m_quatOrientation.Get()[3] = fZ; pInst->setOrientation(pInst->m_quatOrientation); }, false); IWE_PROP_LEVEL_END(); IWE_IMPLEMENT_PROP_END() We are finding an simplified way to this, without leading confusing the programmers, (will be released to the public) i find ways to achieve this but they are only available for the common scripting as Lua or editors using C#. also too portable, we can write "wrappers" for different GUI toolkits as Qt or GTK, also i'm thinking to using Boost.Wave to get additional macro functionality without creating my own compiler. The properties designed to use in the editor they are removed in the game since the save file contains their data and loads it using an simple 'load' function to reduce unnecessary code bloat may will be useful if some GameObject property wants to be hidden instead. In summary, there's a way to implement an reflection(property) system for a level editor based in properties from derived classes? Also we can use C++11 and Boost (restricted only to Wave and PropertyTree)

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• Meet Matthijs, Dutch Inside Sales Representative for Oracle Direct

  - by Maria Sandu

  Today we would like to share some information around the Dutch Core Technology team in Malaga. Matthijs is one of the team members who decided to relocate from the Netherlands to Malaga to join Oracle Direct two years ago. Matthijs: “For the past two years I have been working as an Oracle Direct Core Technology Inside Sales representative for Named Accounts in the Netherlands, based in Malaga, Spain. In my case, working for the Dutch OD Core Technology team means that I am responsible for the Account Management of Larger companies in the Travel & Transportation and the Manufacturing, Retail & Distribution sector. I work together with the Oracle Field Account Managers and our Field Sales Management in the Netherlands where I am often the main point of contact for customers. This means that I deal with their requests and I manage their various issues, provide solutions and suggestions based on the Oracle Core Technology portfolio. I work on interesting projects with end-customers, making financial proposals and building business cases. It is a very interesting sales environment and for the last two years I improved my skills substantially. This month I will finish my Inside Sales career in Malaga to move to a position within Field Sales in the Netherlands. Oracle Direct has proven to be a great stepping stone for my career. Boost your personal development One of the reasons for joining Oracle was to boost my personal & career development. You can choose from various different trainings to follow all over Europe which enable you to reach both your personal and professional goals. Furthermore, you can decide your own career path and plan the steps necessary to achieve your goal. Many people aim to grow into Field Sales in their native countries, Business Development or Sales Management, but there are many possibilities once you decide to join Oracle. Overall, working at Oracle means working for an international company and one of the worldwide leaders in Enterprise Hardware & Software. Here you get all the tools necessary to develop yourself personally & professionally. Another great advantage of working for Oracle Direct is working from our office in Malaga, Southern Spain where we have over 400 employees from many countries across EMEA. It is a truly international environment! Working and living in Spain gives you an excellent opportunity to learn Spanish and of course enjoy the Spanish lifestyle, cuisine, beaches and much, much more!” Interview day Utrecht If you are inspired by the story of Matthijs and would like to explore the opportunity to join the Technology Sales team for the Dutch market in Malaga, let us know! We will organise an Interview day in the Oracle office in Utrecht on the 18th and 19th of September. We currently have multiple openings in the Core Technology team that focus on selling our Database portfolio in the Dutch market. We are looking for native Dutch speakers with a Bachelors degree, 2-5 years sales experience (ideally in IT) who are willing to relocate to Malaga for at least 2 years! For more information please contact [email protected] or [email protected].

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• Creating a voxel world with 3D arrays using threads

  - by Sean M.

  I am making a voxel game (a bit like Minecraft) in C++(11), and I've come across an issue with creating a world efficiently. In my program, I have a World class, which holds a 3D array of Region class pointers. When I initialize the world, I give it a width, height, and depth so it knows how large of a world to create. Each Region is split up into a 32x32x32 area of blocks, so as you may guess, it takes a while to initialize the world once the world gets to be above 8x4x8 Regions. In order to alleviate this issue, I thought that using threads to generate different levels of the world concurrently would make it go faster. Having not used threads much before this, and being still relatively new to C++, I'm not entirely sure how to go about implementing one thread per level (level being a xz plane with a height of 1), when there is a variable number of levels. I tried this: for(int i = 0; i < height; i++) { std::thread th(std::bind(&World::load, this, width, height, depth)); th.join(); } Where load() just loads all Regions at height "height". But that executes the threads one at a time (which makes sense, looking back), and that of course takes as long as generating all Regions in one loop. I then tried: std::thread t1(std::bind(&World::load, this, w, h1, h2 - 1, d)); std::thread t2(std::bind(&World::load, this, w, h2, h3 - 1, d)); std::thread t3(std::bind(&World::load, this, w, h3, h4 - 1, d)); std::thread t4(std::bind(&World::load, this, w, h4, h - 1, d)); t1.join(); t2.join(); t3.join(); t4.join(); This works in that the world loads about 3-3.5 times faster, but this forces the height to be a multiple of 4, and it also gives the same exact VAO object to every single Region, which need individual VAOs in order to render properly. The VAO of each Region is set in the constructor, so I'm assuming that somehow the VAO number is not thread safe or something (again, unfamiliar with threads). So basically, my question is two one-part: How to I implement a variable number of threads that all execute at the same time, and force the main thread to wait for them using join() without stopping the other threads? How do I make the VAO objects thread safe, so when a bunch of Regions are being created at the same time across multiple threads, they don't all get the exact same VAO? Turns out it has to do with GL contexts not working across multiple threads. I moved the VAO/VBO creation back to the main thread. Fixed! Here is the code for block.h/.cpp, region.h/.cpp, and CVBObject.h/.cpp which controls VBOs and VAOs, in case you need it. If you need to see anything else just ask. EDIT: Also, I'd prefer not to have answers that are like "you should have used boost". I'm trying to do this without boost to get used to threads before moving onto other libraries.

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• Using Oracle Proxy Authentication with JPA (eclipselink-Style)

  - by olaf.heimburger

  Security is a very intriguing topic. You will find it everywhere and you need to implement it everywhere. Yes, you need. Unfortunately, one can easily forget it while implementing the last mile. The Last Mile In a multi-tier application it is a common practice to use connection pools between the business layer and the database layer. Connection pools are quite useful to speed database connection creation and to split the load. Another very common practice is to use a specific, often called technical, user to connect to the database. This user has authentication and authorization rules that apply to all application users. Imagine you've put every effort to define roles for different types of users that use your application. These roles are necessary to differentiate between normal users, premium users, and administrators (I bet you will find or already have more roles in your application). While these user roles are pretty well used within your application, once the flow of execution enters the database everything is gone. Each and every user just has one role and is the same database user. Issues? What Issues? As long as things go well, this is not a real issue. However, things do not go well all the time. Once your application becomes famous performance decreases in certain situations or, more importantly, current and upcoming regulations and laws require that your application must be able to apply different security measures on a per user role basis at every stage of your application. If you only have a bunch of users with the same name and role you are not able to find the application usage profile that causes the performance issue, or which user has accessed data that he/she is not allowed to. Another thread to your role concept is that databases tend to be used by different applications and tools. These tools can be developer tools like SQL*Plus, SQL Developer, etc. or end user applications like BI Publisher, Oracle Forms and so on. These tools have no idea of your applications role concept and access the database the way they think is appropriate. A big oversight for your perfect role model and a big nightmare for your Chief Security Officer. Speaking of the CSO, brings up another issue: Password management. Once your technical user account is compromised, every user is able to do things that he/she is not expected to do from the design of your application. Counter Measures In the Oracle world a common counter measure is to use Virtual Private Database (VPD). This restricts the values a database user can see to the allowed minimum. However, it doesn't help in regard of a connection pool user, because this one is still not the real user. Oracle Proxy Authentication Another feature of the Oracle database is Proxy Authentication. First introduced with version 9i it is a quite useful feature for nearly every situation. The main idea behind Proxy Authentication is, to create a crippled database user who has only connect rights. Even if this user is compromised the risks are well understood and fairly limited. This user can be used in every situation in which you need to connect to the database, no matter which tool or application (see above) you use.The proxy user is perfect for multi-tier connection pools. CREATE USER app_user IDENTIFIED BY abcd1234; GRANT CREATE SESSION TO app_user; But what if you need to access real data? Well, this is the primary use case, isn't it? Now is the time to bring the application's role concept into play. You define database roles that define the grants for your identified user groups. Once you have these groups you grant access through the proxy user with the application role to the specific user. CREATE ROLE app_role_a; GRANT app_role_a TO scott; ALTER USER scott GRANT CONNECT THROUGH app_user WITH ROLE app_role_a; Now, hr has permission to connect to the database through the proxy user. Through the role you can restrict the hr's rights the are needed for the application only. If hr connects to the database directly all assigned role and permissions apply. Testing the Setup To test the setup you can use SQL*Plus and connect to your database: $ sqlplus app_user[hr]/abcd1234 Java Persistence API The Java Persistence API (JPA) is a fairly easy means to build applications that retrieve data from the database and put it into Java objects. You use plain old Java objects (POJOs) and mixin some Java annotations that define how the attributes of the object are used for storing data from the database into the Java object. Here is a sample for objects from the HR sample schema EMPLOYEES table. When using Java annotations you only specify what can not be deduced from the code. If your Java class name is Employee but the table name is EMPLOYEES, you need to specify the table name, otherwise it will fail. package demo.proxy.ejb; import java.io.Serializable; import java.sql.Timestamp; import java.util.List; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.JoinColumn; import javax.persistence.ManyToOne; import javax.persistence.NamedQueries; import javax.persistence.NamedQuery; import javax.persistence.OneToMany; import javax.persistence.Table; @Entity @NamedQueries({ @NamedQuery(name = "Employee.findAll", query = "select o from Employee o") }) @Table(name = "EMPLOYEES") public class Employee implements Serializable { @Column(name="COMMISSION_PCT") private Double commissionPct; @Column(name="DEPARTMENT_ID") private Long departmentId; @Column(nullable = false, unique = true, length = 25) private String email; @Id @Column(name="EMPLOYEE_ID", nullable = false) private Long employeeId; @Column(name="FIRST_NAME", length = 20) private String firstName; @Column(name="HIRE_DATE", nullable = false) private Timestamp hireDate; @Column(name="JOB_ID", nullable = false, length = 10) private String jobId; @Column(name="LAST_NAME", nullable = false, length = 25) private String lastName; @Column(name="PHONE_NUMBER", length = 20) private String phoneNumber; private Double salary; @ManyToOne @JoinColumn(name = "MANAGER_ID") private Employee employee; @OneToMany(mappedBy = "employee") private List employeeList; public Employee() { } public Employee(Double commissionPct, Long departmentId, String email, Long employeeId, String firstName, Timestamp hireDate, String jobId, String lastName, Employee employee, String phoneNumber, Double salary) { this.commissionPct = commissionPct; this.departmentId = departmentId; this.email = email; this.employeeId = employeeId; this.firstName = firstName; this.hireDate = hireDate; this.jobId = jobId; this.lastName = lastName; this.employee = employee; this.phoneNumber = phoneNumber; this.salary = salary; } public Double getCommissionPct() { return commissionPct; } public void setCommissionPct(Double commissionPct) { this.commissionPct = commissionPct; } public Long getDepartmentId() { return departmentId; } public void setDepartmentId(Long departmentId) { this.departmentId = departmentId; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public Long getEmployeeId() { return employeeId; } public void setEmployeeId(Long employeeId) { this.employeeId = employeeId; } public String getFirstName() { return firstName; } public void setFirstName(String firstName) { this.firstName = firstName; } public Timestamp getHireDate() { return hireDate; } public void setHireDate(Timestamp hireDate) { this.hireDate = hireDate; } public String getJobId() { return jobId; } public void setJobId(String jobId) { this.jobId = jobId; } public String getLastName() { return lastName; } public void setLastName(String lastName) { this.lastName = lastName; } public String getPhoneNumber() { return phoneNumber; } public void setPhoneNumber(String phoneNumber) { this.phoneNumber = phoneNumber; } public Double getSalary() { return salary; } public void setSalary(Double salary) { this.salary = salary; } public Employee getEmployee() { return employee; } public void setEmployee(Employee employee) { this.employee = employee; } public List getEmployeeList() { return employeeList; } public void setEmployeeList(List employeeList) { this.employeeList = employeeList; } public Employee addEmployee(Employee employee) { getEmployeeList().add(employee); employee.setEmployee(this); return employee; } public Employee removeEmployee(Employee employee) { getEmployeeList().remove(employee); employee.setEmployee(null); return employee; } } JPA could be used in standalone applications and Java EE containers. In both worlds you normally create a Facade to retrieve or store the values of the Entities to or from the database. The Facade does this via an EntityManager which will be injected by the Java EE container. Here is sample Facade Session Bean for a Java EE container. package demo.proxy.ejb; import java.util.HashMap; import java.util.List; import javax.ejb.Local; import javax.ejb.Remote; import javax.ejb.Stateless; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import javax.persistence.Query; import javax.interceptor.AroundInvoke; import javax.interceptor.InvocationContext; import oracle.jdbc.driver.OracleConnection; import org.eclipse.persistence.config.EntityManagerProperties; import org.eclipse.persistence.internal.jpa.EntityManagerImpl; @Stateless(name = "DataFacade", mappedName = "ProxyUser-TestEJB-DataFacade") @Remote @Local public class DataFacadeBean implements DataFacade, DataFacadeLocal { @PersistenceContext(unitName = "TestEJB") private EntityManager em; private String username; public Object queryByRange(String jpqlStmt, int firstResult, int maxResults) { // setSessionUser(); Query query = em.createQuery(jpqlStmt); if (firstResult 0) { query = query.setFirstResult(firstResult); } if (maxResults 0) { query = query.setMaxResults(maxResults); } return query.getResultList(); } public Employee persistEmployee(Employee employee) { // setSessionUser(); em.persist(employee); return employee; } public Employee mergeEmployee(Employee employee) { // setSessionUser(); return em.merge(employee); } public void removeEmployee(Employee employee) { // setSessionUser(); employee = em.find(Employee.class, employee.getEmployeeId()); em.remove(employee); } /** select o from Employee o */ public List getEmployeeFindAll() { Query q = em.createNamedQuery("Employee.findAll"); return q.getResultList(); } Putting Both Together To use Proxy Authentication with JPA and within a Java EE container you have to take care of the additional requirements: Use an OCI JDBC driver Provide the user name that connects through the proxy user Use an OCI JDBC driver To use the OCI JDBC driver you need to set up your JDBC data source file to use the correct JDBC URL. hr jdbc:oracle:oci8:@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521))(CONNECT_DATA=(SID=XE))) oracle.jdbc.OracleDriver user app_user 62C32F70E98297522AD97E15439FAC0E SQL SELECT 1 FROM DUAL jdbc/hrDS Application Additionally you need to make sure that the version of the shared libraries of the OCI driver match the version of the JDBC driver in your Java EE container or Java application and are within your PATH (on Windows) or LD_LIBRARY_PATH (on most Unix-based systems). Installing the Oracle Database Instance Client software works perfectly. Provide the user name that connects through the proxy user This part needs some modification of your application software and session facade. Session Facade Changes In the Session Facade we must ensure that every call that goes through the EntityManager must be prepared correctly and uniquely assigned to this session. The second is really important, as the EntityManager works with a connection pool and can not guarantee that we set the proxy user on the connection that will be used for the database activities. To avoid changing every method call of the Session Facade we provide a method to set the username of the user that connects through the proxy user. This method needs to be called by the Facade client bfore doing anything else. public void setUsername(String name) { username = name; } Next we provide a means to instruct the TopLink EntityManager Delegate to use Oracle Proxy Authentication. (I love small helper methods to hide the nitty-gritty details and avoid repeating myself.) private void setSessionUser() { setSessionUser(username); } private void setSessionUser(String user) { if (user != null && !user.isEmpty()) { EntityManagerImpl emDelegate = ((EntityManagerImpl)em.getDelegate()); emDelegate.setProperty(EntityManagerProperties.ORACLE_PROXY_TYPE, OracleConnection.PROXYTYPE_USER_NAME); emDelegate.setProperty(OracleConnection.PROXY_USER_NAME, user); emDelegate.setProperty(EntityManagerProperties.EXCLUSIVE_CONNECTION_MODE, "Always"); } } The final step is use the EJB 3.0 AroundInvoke interceptor. This interceptor will be called around every method invocation. We therefore check whether the Facade methods will be called or not. If so, we set the user for proxy authentication and the normal method flow continues. @AroundInvoke public Object proxyInterceptor(InvocationContext invocationCtx) throws Exception { if (invocationCtx.getTarget() instanceof DataFacadeBean) { setSessionUser(); } return invocationCtx.proceed(); } Benefits Using Oracle Proxy Authentification has a number of additional benefits appart from implementing the role model of your application: Fine grained access control for temporary users of the account, without compromising the original password. Enabling database auditing and logging. Better identification of performance bottlenecks. References Effective Oracle Database 10g Security by Design, David Knox TopLink Developer's Guide, Chapter 98

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• CodePlex Daily Summary for Sunday, March 04, 2012

  CodePlex Daily Summary for Sunday, March 04, 2012Popular ReleasesWDTVHubGen - Adds Metadata, thumbnails and subtitles to WDTV Live Hubs: v2.1.2 (Maintenance Release): This release was added to add a quick feature to allow renaming the processed video file back to its original name as a "just in case" when you process all and it screws up the directory. This is a "right click" option in the menu over the file that is screwed up. I wouldn't download this unless you need this fix, or you just want the latest latest latest version. I am in the process of adding a lot of fixes and changes to the existing system and releasing it with an alternate interface, s...People's Note: People's Note 0.38: Version 0.38 allows you to choose "All Notebooks" to browse, search, and sync all your notebooks together. To install: copy the appropriate CAB file onto your WM device and run it.ASP.NET MVC Framework - Abstracting Data Annotations, HTML5, Knockout JS techs: Version 1.0: Please download the source code. I am not associating any dll for release.ExtAspNet: ExtAspNet v3.1.0: ExtAspNet - ?? ExtJS ??? ASP.NET 2.0 ???，????? AJAX ?????????? ExtAspNet ????? ExtJS ??? ASP.NET 2.0 ???，????? AJAX ??????????。 ExtAspNet ??????? JavaScript，?? CSS，?? UpdatePanel，?? ViewState，?? WebServices ???????。 ??????: IE 7.0, Firefox 3.6, Chrome 3.0, Opera 10.5, Safari 3.0+ ????：Apache License 2.0 (Apache) ??：http://extasp.net/ ??：http://bbs.extasp.net/ ??：http://extaspnet.codeplex.com/ ??：http://sanshi.cnblogs.com/ ????： +2012-03-04 v3.1.0 -??Hidden???????（〓?〓）。 -?PageManager??...AcDown????? - Anime&Comic Downloader: AcDown????? v3.9.1: ?? ●AcDown??????????、??、??????，????1M，????，????，?????????????????????????。???????????Acfun、????(Bilibili)、??、??、YouTube、??、???、??????、SF????、????????????。??????AcPlay?????，??????、????????????????。 ● AcDown???????????????????????????，???，???????????????????。 ● AcDown???????C#??，????.NET Framework 2.0??。?????"Acfun?????"。 ????32??64? Windows XP/Vista/7/8 ????????????? ??：????????Windows XP???,?????????.NET Framework 2.0???(x86)，?????"?????????"??? ??????????????，??????????： ??"AcDo...Windows Phone Commands for VS2010: Version 1.0: Initial Release Version 1.0 Connect from device or emulator (Monitors the connection) Show Device information (Plataform, build , version, avaliable memory, total memory, architeture Manager installed applications (Launch, uninstall and explorer isolate storage files) Manager core applications (Launch blocked applications from emulator (Office, Calculator, alarm, calendar , etc) Manager blocked settings from emulator (Airplane Mode, Celullar Network, Wifi, etc) Deploy and update ap...DNN Metro7 style Skin package: Metro7 style Skin for DotNetNuke 06.01.00: Changes on Version 06.01.00 Fixed issue on GraySmallTitle container, that breaks the layout Fixed issue on Blue Metro7 Skin where the Search, Login, Register, Date is missing Fixed issue with the Version numbers on the target file Fixed issue where the jQuery and jQuery-UI files not deleted on upgrade from Version 01.00.00 Added a internal page where the Image Slider would be replaces with a BannerPaneMedia Companion: MC 3.433b Release: General More GUI tweaks (mostly imperceptible!) Updates for mc_com.exe TV The 'Watched' button has been re-instigated Added TV Menu sub-option to search ALL for new Episodes (includes locked shows) Movies Added 'Source' field (eg DVD, Bluray, HDTV), customisable in Advanced Preferences (try it out, let us know how it works!) Added HTML <<format>> tag with optional parameters for video container, source, and resolution (updated HTML tags to be added to Documentation shortly) Known Issu...Picturethrill: Version 2.3.2.0: Release includes Self-Update feature for Picturethrill. What that means for users is that they are always guaranteed to have a fresh copy of Picturethrill on their computers with all latest fixes. When Picturethrill adds a new website to get pictures from, you will get it too!Simple MVVM Toolkit for Silverlight, WPF and Windows Phone: Simple MVVM Toolkit v3.0.0.0: Added support for Silverlight 5.0 and Windows Phone 7.1. Upgraded project templates and samples. Upgraded installer. There are some new prerequisites required for this version, namely Silverlight 5 Tools, Expression Blend Preview for Silverlight 5 (until the SDK is released), Windows Phone 7.1 SDK. Because it is in the experimental band, I have also removed the dependency on the Silverlight Testing Framework. You can use it if you wish, but the Ria Services project template no longer uses ...CODE Framework: 4.0.20301: The latest version adds a number of new features to the WPF system (such as stylable and testable messagebox support) as well as various new features throughout the system (especially in the Utilities namespace).MyRouter (Virtual WiFi Router): MyRouter 1.0.1 (Beta): A friendlier User Interface. A logger file to catch exceptions so you may send it to use to improve and fix any bugs that may occur. A feedback form because we always love hearing what you guy's think of MyRouter. Check for update menu item for you to stay up to date will the latest changes. Facebook fan page so you may spread the word and share MyRouter with friends and family And Many other exciting features were sure your going to love!WPF Sound Visualization Library: WPF SVL 0.3 (Source, Binaries, Examples, Help): Version 0.3 of WPFSVL. This includes three new controls: an equalizer, a digital clock, and a time editor.Orchard Project: Orchard 1.4: Please read our release notes for Orchard 1.4: http://docs.orchardproject.net/Documentation/Orchard-1-4-Release-NotesFluentData -Micro ORM with a fluent API that makes it simple to query a database: FluentData version 1.2: New features: - QueryValues method - Added support for automapping to enumerations (both int and string are supported). Fixed 2 reported issues.NetSqlAzMan - .NET SQL Authorization Manager: 3.6.0.15: 3.6.0.15 28-Feb-2012 • Fix: The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communication because it is in the Faulted state. Work Item 10435: http://netsqlazman.codeplex.com/workitem/10435 • Fix: Made StorageCache thread safe. Thanks to tangrl. • Fix: Members property of SqlAzManApplicationGroup is not functioning. Thanks to tangrl. Work Item 10267: http://netsqlazman.codeplex.com/workitem/10267 • Fix: Indexer are making database calls. Thanks to t...SCCM Client Actions Tool: Client Actions Tool v1.1: SCCM Client Actions Tool v1.1 is the latest version. It comes with following changes since last version: Added stop button to stop the ongoing process. Added action "Query update status". Added option "saveOnlineComputers" in config.ini to enable saving list of online computers from last session. Default value for "LatestClientVersion" set to SP2 R3 (4.00.6487.2157). Wuauserv service manual startup mode is considered healthy on Windows 7. Errors are now suppressed in checkReleases...SharpCompress - a fully native C# library for RAR, 7Zip, Zip, Tar, GZip, BZip2: SharpCompress 0.8: API Updates: SOLID Extract Method for Archives (7Zip and RAR). ExtractAllEntries method on Archive classes will extract archives as a streaming file. This can offer better 7Zip extraction performance if any of the entries are solid. The IsSolid method on 7Zip archives will return true if any are solid. Removed IExtractionListener was removed in favor of events. Unit tests show example. Bug fixes: PPMd passes tests plus other fixes (Thanks Pavel) Zip used to always write a Post Descri...SQL Live Monitor: SQL Live Monitor 1.31: A quick fix to make it this version work with SQL 2012. Version 2 already has 2012 working, but am still developing the UI in version 2, so this is just an interim fix to allow user to monitor SQL 2012.DotNet.Highcharts: DotNet.Highcharts 1.1 with Examples: Fixed small bug in JsonSerializer about the numbers represented as string. Fixed Issue 310: decimal values don't work Fixed Issue 345: Disable Animation Refactored Highcharts class. Implemented Issue 341: More charts on one page. Added new class Container which can combine and display multiple charts. Usage: new Container(new[] { chart1, chart2, chart3, chart4 }) Implemented Feature 302: Inside an UpdatePanel - Added method (InFunction) which create the Highchart inside JavaScript f...New ProjectsAddress Manager: Projet pour ma mémoireAkumuLogger: AkumuLogger is a configurable C++ logger for windows. Developed for educational purposes in association with the GoDevMental blog.ASP.NET MVC Framework - Abstracting Data Annotations, HTML5, Knockout JS techs: ASP.NET MVC Framework that abstracts Data Annotations, HTML5, Knockout JS technologies and gives super power to front end developer.BabySmash! Html5: HTML5 port of http://babysmash.codeplex.com/ using canvas, svg and audio.Business Solutions On SharePoint: A series of seed solutions for business solutions based on SharePoint 2010. First solution is an HR On-boarding solution.C# Psp Emulator: A C# Psp EmulatorClear Mine: The classic minesweeper game that implemented by WPF, trying to demonstrate a few practices in WPF programming to make application localized decoupled, extensible and support skin. DancingSite: It's time to dance.DynamicMVVM: Dynamic MVVM enables you to quickly build a functional MVVM application, based on WPF without ICommand and XAML and viewmodel Validation.flickerwin8: flicker client sample for windows 8Form and List Plus: Form and List plus 5.1.3 with more data typesHappyFunTimes :): wtf nigga ?Kavand WPF Kit: Kavand.WpfKit makes it easier for WPF developers to develop MVVM-based applications. It also contains some useful controls. It's developed in C#.NET 4Library Management System: ??????—??????MPTrackWP7: First attempt at Converting the ModPlug application written by Olivier Lapicue for Windows Phone 7 in C#My Note Pal: MyNotePal is a personal financial management tool on your Phone.Nhom: demolam nhomPrabor jQuery Plugins: Little but helpful jQuery plugins from Prabor teamReSharper GammaXaml Plugin: A plugin for JetBrains ReSharper 6.1 that enhances XAML editing and working with WPF and Silverlight in general.Road Trip 2012: Just my code for appharborSharePoint Optimizer: Tool to optimize SharePointYALV! - Yet Another Log4Net Viewer: YALV! is a log viewer for Log4Net that allow to compare multiple logs file simultaneously; include features like merging, filtering, open most recently used files, items sorting. It is a WPF Application based on .NET Framework 4.0 and written with C# language.

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