business rules - Page 551

Winform radiobutton data binding

- by Rajarshi

I am following the "Presentation Model" design pattern suggested by Martin Fowler for my GUI architecture in a Windows Forms project. "The essence of a Presentation Model is of a fully self-contained class that represents all the data and behavior of the UI window, but without any of the controls used to render that UI on the screen. A view then simply projects the state of the presentation model onto the glass...." - Martin Fowler Read more about this pattern at www.martinfowler.com/eaaDev/PresentationModel.html I am finding the concept very fluid and easy to understand except this one issue of data binding RadioButtons to properties on the Data/Domain object. Suposing I have a Windows Form with 3 radio buttons to depict some "Mode" options as - Auto Manual Import How can I use boolean properties on Data/Domain Objects to DataBind to these buttons? I have tried many ways but to no avail. For example I would like to code like - rbtnAutoMode.DataBindings.Add("Text", myBusinessObject, "IsAutoMode"); rbtnManualMode.DataBindings.Add("Text", myBusinessObject, "IsManualMode"); rbtnImportMode.DataBindings.Add("Text", myBusinessObject, "IsImportMode"); There should be a fourth property like "SelectedMode" on the data/domain object which at the end should depict a single value like "SelectedMode = Auto". I am trying to update this property when any of the "IsAutoMode", "IsManualMode" or "IsImportMode" is changed, e.g. through the property setters. I have INotifyPropertyChanged implemented on my data/domain object so, updating any data/domain object property automatically updates my UI controls, that's not an issue. There is a good example of binding 2 radio buttons here - http://stackoverflow.com/questions/344964/how-do-i-use-databinding-with-windows-forms-radio-buttons but I am missing the link while implementing the same with 3 buttons. I am having very erratic behaviors for the Radio Buttons. I hope I was able to explain reasonably. I am actually in a hurry and could not put a detailed code on post, but any help in this regard is appreciated. There is a simple solution to this issue by exposing a method like - public void SetMode(Modes mode) { this._selectedMode = mode; } which could be called from the "CheckedChanged" event of the Radio Buttons from the UI and would perfectly set the "SelectedMode" on the business object, but I need to stretch the limits to verify whether this can be done by DataBinding.

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Find optimal strategy and AI for the game 'Proximity'?

- by smci

'Proximity' is a strategy game of territorial domination similar to Othello, Go and Risk. Two players, uses a 10x12 hex grid. Game invented by Brian Cable in 2007. Seems to be a worthy game for discussing a) optimal algorithm then b) how to build an AI. Strategies are going to be probabilistic or heuristic-based, due to the randomness factor, and the insane branching factor (20^120). So it will be kind of hard to compare objectively. A compute time limit of 5s per turn seems reasonable. Game: Flash version here and many copies elsewhere on the web Rules: here Object: to have control of the most armies after all tiles have been placed. Each turn you received a randomly numbered tile (value between 1 and 20 armies) to place on any vacant board space. If this tile is adjacent to any ally tiles, it will strengthen each tile's defenses +1 (up to a max value of 20). If it is adjacent to any enemy tiles, it will take control over them if its number is higher than the number on the enemy tile. Thoughts on strategy: Here are some initial thoughts; setting the computer AI to Expert will probably teach a lot: minimizing your perimeter seems to be a good strategy, to prevent flips and minimize worst-case damage like in Go, leaving holes inside your formation is lethal, only more so with the hex grid because you can lose armies on up to 6 squares in one move low-numbered tiles are a liability, so place them away from your main territory, near the board edges and scattered. You can also use low-numbered tiles to plug holes in your formation, or make small gains along the perimeter which the opponent will not tend to bother attacking. a triangle formation of three pieces is strong since they mutually reinforce, and also reduce the perimeter Each tile can be flipped at most 6 times, i.e. when its neighbor tiles are occupied. Control of a formation can flow back and forth. Sometimes you lose part of a formation and plug any holes to render that part of the board 'dead' and lock in your territory/ prevent further losses. Low-numbered tiles are obvious-but-low-valued liabilities, but high-numbered tiles can be bigger liabilities if they get flipped (which is harder). One lucky play with a 20-army tile can cause a swing of 200 (from +100 to -100 armies). So tile placement will have both offensive and defensive considerations. Comment 1,2,4 seem to resemble a minimax strategy where we minimize the maximum expected possible loss (modified by some probabilistic consideration of the value ß the opponent can get from 1..20 i.e. a structure which can only be flipped by a ß=20 tile is 'nearly impregnable'.) I'm not clear what the implications of comments 3,5,6 are for optimal strategy. Interested in comments from Go, Chess or Othello players. (The sequel ProximityHD for XBox Live, allows 4-player -cooperative or -competitive local multiplayer increases the branching factor since you now have 5 tiles in your hand at any given time, of which you can only play one. Reinforcement of ally tiles is increased to +2 per ally.)

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How do I configure OpenVPN for accessing the internet with one NIC?

- by Lekensteyn

I've been trying to get OpenVPN to work for three days. After reading many questions, the HOWTO, the FAQ and even parts of a guide to Linux networking, I cannot get my an Internet connection to the Internet. I'm trying to set up a OpenVPN server on a VPS, which will be used for: secure access to the Internet bypassing port restrictions (directadmin/2222 for example) an IPv6 connection (my client does only have IPv4 connectivity, while the VPS has both IPv4 and native IPv6 connectivity) (if possible) I can connect to my server and access the machine (HTTP), but Internet connectivity fails completely. I'm using ping 8.8.8.8 for testing whether my connection works or not. Using tcpdump and iptables -t nat -A POSTROUTING -j LOG, I can confirm that the packets reach my server. If I ping to 8.8.8.8 on the VPS, I get an echo-reply from 8.8.8.8 as expected. When pinging from the client, I do not get an echo-reply. The VPS has only one NIC: etho. It runs on Xen. Summary: I want to have a secure connection between my laptop and the Internet using OpenVPN. If that works, I want to have IPv6 connectivity as well. Network setup and software: Home laptop (eth0: 192.168.2.10) (tap0: 10.8.0.2) | | (running Kubuntu 10.10; OpenVPN 2.1.0-3ubuntu1) | wifi | router/gateway (gateway 192.168.2.1) | INTERNET | VPS (eth0:1.2.3.4) (gateway, tap0: 10.8.0.1) (running Debian 6; OpenVPN 2.1.3-2) wifi and my home router should not cause problems since all traffic goes encrypted over UDP port 1194. I've turned IP forwarding on: # echo 1 > /proc/sys/net/ipv4/ip_forward iptables has been configured to allow forwarding traffic as well: iptables -F FORWARD iptables -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT iptables -A FORWARD -s 10.8.0.0/24 -j ACCEPT iptables -A FORWARD -j DROP I've tried each of these rules separately without luck (flushing the chains before executing): iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j SNAT --to 1.2.3.4 iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j MASQUERADE route -n before (server): 1.2.3.4 0.0.0.0 255.255.255.0 U 0 0 0 eth0 0.0.0.0 1.2.3.4 0.0.0.0 UG 0 0 0 eth0 route -n after (server): 1.2.3.4 0.0.0.0 255.255.255.0 U 0 0 0 eth0 10.8.0.0 0.0.0.0 255.255.255.0 U 0 0 0 tap0 0.0.0.0 1.2.3.4 0.0.0.0 UG 0 0 0 eth0 route -n before (client): 192.168.2.0 0.0.0.0 255.255.255.0 U 2 0 0 wlan0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlan0 0.0.0.0 192.168.2.1 0.0.0.0 UG 0 0 0 wlan0 route -n after (client): 1.2.3.4 192.168.2.1 255.255.255.255 UGH 0 0 0 wlan0 10.8.0.0 0.0.0.0 255.255.255.0 U 0 0 0 tap0 192.168.2.0 0.0.0.0 255.255.255.0 U 2 0 0 wlan0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlan0 0.0.0.0 10.8.0.1 128.0.0.0 UG 0 0 0 tap0 128.0.0.0 10.8.0.1 128.0.0.0 UG 0 0 0 tap0 0.0.0.0 192.168.2.1 0.0.0.0 UG 0 0 0 wlan0 SERVER config proto udp dev tap ca ca.crt cert server.crt key server.key dh dh1024.pem server 10.8.0.0 255.255.255.0 push "redirect-gateway def1" ifconfig-pool-persist ipp.txt keepalive 10 120 tls-auth ta.key 0 comp-lzo user nobody group nobody persist-key persist-tun log-append openvpn-log verb 3 mute 10 CLIENT config dev tap proto udp remote 1.2.3.4 1194 resolv-retry infinite nobind persist-key persist-tun ca ca.crt cert client.crt key client.key ns-cert-type server tls-auth ta.key 1 comp-lzo verb 3 mute 20 traceroute 8.8.8.8 works as expected (similar output without OpenVPN activated): 1 10.8.0.1 (10.8.0.1) 24.276 ms 26.891 ms 29.454 ms 2 gw03.sbp.directvps.nl (178.21.112.1) 31.161 ms 31.890 ms 34.458 ms 3 ge0-v0652.cr0.nik-ams.nl.as8312.net (195.210.57.105) 35.353 ms 36.874 ms 38.403 ms 4 ge0-v3900.cr0.nik-ams.nl.as8312.net (195.210.57.53) 41.311 ms 41.561 ms 43.006 ms 5 * * * 6 209.85.248.88 (209.85.248.88) 147.061 ms 36.931 ms 28.063 ms 7 216.239.49.36 (216.239.49.36) 31.109 ms 33.292 ms 216.239.49.28 (216.239.49.28) 64.723 ms 8 209.85.255.130 (209.85.255.130) 49.350 ms 209.85.255.126 (209.85.255.126) 49.619 ms 209.85.255.122 (209.85.255.122) 52.416 ms 9 google-public-dns-a.google.com (8.8.8.8) 41.266 ms 44.054 ms 44.730 ms If you have any suggestions, please comment or answer. Thanks in advance.

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How to implement an offline reader writer lock

- by Peter Morris

Some context for the question All objects in this question are persistent. All requests will be from a Silverlight client talking to an app server via a binary protocol (Hessian) and not WCF. Each user will have a session key (not an ASP.NET session) which will be a string, integer, or GUID (undecided so far). Some objects might take a long time to edit (30 or more minutes) so we have decided to use pessimistic offline locking. Pessimistic because having to reconcile conflicts would be far too annoying for users, offline because the client is not permanently connected to the server. Rather than storing session/object locking information in the object itself I have decided that any aggregate root that may have its instances locked should implement an interface ILockable public interface ILockable { Guid LockID { get; } } This LockID will be the identity of a "Lock" object which holds the information of which session is locking it. Now, if this were simple pessimistic locking I'd be able to achieve this very simply (using an incrementing version number on Lock to identify update conflicts), but what I actually need is ReaderWriter pessimistic offline locking. The reason is that some parts of the application will perform actions that read these complex structures. These include things like Reading a single structure to clone it. Reading multiple structures in order to create a binary file to "publish" the data to an external source. Read locks will be held for a very short period of time, typically less than a second, although in some circumstances they could be held for about 5 seconds at a guess. Write locks will mostly be held for a long time as they are mostly held by humans. There is a high probability of two users trying to edit the same aggregate at the same time, and a high probability of many users needing to temporarily read-lock at the same time too. I'm looking for suggestions as to how I might implement this. One additional point to make is that if I want to place a write lock and there are some read locks, I would like to "queue" the write lock so that no new read locks are placed. If the read locks are removed withing X seconds then the write lock is obtained, if not then the write lock backs off; no new read-locks would be placed while a write lock is queued. So far I have this idea The Lock object will have a version number (int) so I can detect multi-update conflicts, reload, try again. It will have a string[] for read locks A string to hold the session ID that has a write lock A string to hold the queued write lock Possibly a recursion counter to allow the same session to lock multiple times (for both read and write locks), but not sure about this yet. Rules: Can't place a read lock if there is a write lock or queued write lock. Can't place a write lock if there is a write lock or queued write lock. If there are no locks at all then a write lock may be placed. If there are read locks then a write lock will be queued instead of a full write lock placed. (If after X time the read locks are not gone the lock backs off, otherwise it is upgraded). Can't queue a write lock for a session that has a read lock. Can anyone see any problems? Suggest alternatives? Anything? I'd appreciate feedback before deciding on what approach to take.

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Two network interfaces and two IP addresses on the same subnet in Linux

- by Scott Duckworth

I recently ran into a situation where I needed two IP addresses on the same subnet assigned to one Linux host so that we could run two SSL/TLS sites. My first approach was to use IP aliasing, e.g. using eth0:0, eth0:1, etc, but our network admins have some fairly strict settings in place for security that squashed this idea: They use DHCP snooping and normally don't allow static IP addresses. Static addressing is accomplished by using static DHCP entries, so the same MAC address always gets the same IP assignment. This feature can be disabled per switchport if you ask and you have a reason for it (thankfully I have a good relationship with the network guys and this isn't hard to do). With the DHCP snooping disabled on the switchport, they had to put in a rule on the switch that said MAC address X is allowed to have IP address Y. Unfortunately this had the side effect of also saying that MAC address X is ONLY allowed to have IP address Y. IP aliasing required that MAC address X was assigned two IP addresses, so this didn't work. There may have been a way around these issues on the switch configuration, but in an attempt to preserve good relations with the network admins I tried to find another way. Having two network interfaces seemed like the next logical step. Thankfully this Linux system is a virtual machine, so I was able to easily add a second network interface (without rebooting, I might add - pretty cool). A few keystrokes later I had two network interfaces up and running and both pulled IP addresses from DHCP. But then the problem came in: the network admins could see (on the switch) the ARP entry for both interfaces, but only the first network interface that I brought up would respond to pings or any sort of TCP or UDP traffic. After lots of digging and poking, here's what I came up with. It seems to work, but it also seems to be a lot of work for something that seems like it should be simple. Any alternate ideas out there? Step 1: Enable ARP filtering on all interfaces: # sysctl -w net.ipv4.conf.all.arp_filter=1 # echo "net.ipv4.conf.all.arp_filter = 1" >> /etc/sysctl.conf From the file networking/ip-sysctl.txt in the Linux kernel docs: arp_filter - BOOLEAN 1 - Allows you to have multiple network interfaces on the same subnet, and have the ARPs for each interface be answered based on whether or not the kernel would route a packet from the ARP'd IP out that interface (therefore you must use source based routing for this to work). In other words it allows control of which cards (usually 1) will respond to an arp request. 0 - (default) The kernel can respond to arp requests with addresses from other interfaces. This may seem wrong but it usually makes sense, because it increases the chance of successful communication. IP addresses are owned by the complete host on Linux, not by particular interfaces. Only for more complex setups like load- balancing, does this behaviour cause problems. arp_filter for the interface will be enabled if at least one of conf/{all,interface}/arp_filter is set to TRUE, it will be disabled otherwise Step 2: Implement source-based routing I basically just followed directions from http://lartc.org/howto/lartc.rpdb.multiple-links.html, although that page was written with a different goal in mind (dealing with two ISPs). Assume that the subnet is 10.0.0.0/24, the gateway is 10.0.0.1, the IP address for eth0 is 10.0.0.100, and the IP address for eth1 is 10.0.0.101. Define two new routing tables named eth0 and eth1 in /etc/iproute2/rt_tables: ... top of file omitted ... 1 eth0 2 eth1 Define the routes for these two tables: # ip route add default via 10.0.0.1 table eth0 # ip route add default via 10.0.0.1 table eth1 # ip route add 10.0.0.0/24 dev eth0 src 10.0.0.100 table eth0 # ip route add 10.0.0.0/24 dev eth1 src 10.0.0.101 table eth1 Define the rules for when to use the new routing tables: # ip rule add from 10.0.0.100 table eth0 # ip rule add from 10.0.0.101 table eth1 The main routing table was already taken care of by DHCP (and it's not even clear that its strictly necessary in this case), but it basically equates to this: # ip route add default via 10.0.0.1 dev eth0 # ip route add 130.127.48.0/23 dev eth0 src 10.0.0.100 # ip route add 130.127.48.0/23 dev eth1 src 10.0.0.101 And voila! Everything seems to work just fine. Sending pings to both IP addresses works fine. Sending pings from this system to other systems and forcing the ping to use a specific interface works fine (ping -I eth0 10.0.0.1, ping -I eth1 10.0.0.1). And most importantly, all TCP and UDP traffic to/from either IP address works as expected. So again, my question is: is there a better way to do this? This seems like a lot of work for a seemingly simple problem.

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Code Golf: Finite-state machine!

- by Adam Matan

Finite state machine A deterministic finite state machine is a simple computation model, widely used as an introduction to automata theory in basic CS courses. It is a simple model, equivalent to regular expression, which determines of a certain input string is Accepted or Rejected. Leaving some formalities aside, A run of a finite state machine is composed of: alphabet, a set of characters. states, usually visualized as circles. One of the states must be the start state. Some of the states might be accepting, usually visualized as double circles. transitions, usually visualized as directed arches between states, are directed links between states associated with an alphabet letter. input string, a list of alphabet characters. A run on the machine begins at the starting state. Each letter of the input string is read; If there is a transition between the current state and another state which corresponds to the letter, the current state is changed to the new state. After the last letter was read, if the current state is an accepting state, the input string is accepted. If the last state was not an accepting state, or a letter had no corresponding arch from a state during the run, the input string is rejected. Note: This short descruption is far from being a full, formal definition of a FSM; Wikipedia's fine article is a great introduction to the subject. Example For example, the following machine tells if a binary number, read from left to right, has an even number of 0s: The alphabet is the set {0,1}. The states are S1 and S2. The transitions are (S1, 0) -> S2, (S1, 1) -> S1, (S2, 0) -> S1 and (S2, 1) -> S2. The input string is any binary number, including an empty string. The rules: Implement a FSM in a language of your choice. Input The FSM should accept the following input: <States> List of state, separated by space mark. The first state in the list is the start state. Accepting states begin with a capital letter. <transitions> One or more lines. Each line is a three-tuple: origin state, letter, destination state) <input word> Zero or more characters, followed by a newline. For example, the aforementioned machine with 1001010 as an input string, would be written as: S1 s2 S1 0 s2 S1 1 S1 s2 0 S1 s2 1 s2 1001010 Output The FSM's run, written as <State> <letter> -> <state>, followed by the final state. The output for the example input would be: S1 1 -> S1 S1 0 -> s2 s2 0 -> S1 S1 1 -> S1 S1 0 -> s2 s2 1 -> s2 s2 0 -> S1 ACCEPT For the empty input '': S1 ACCEPT For 101: S1 1 -> S1 S1 0 -> s2 s2 1 -> s2 REJECT For '10X': S1 1 -> S1 S1 0 -> s2 s2 X REJECT Prize A nice bounty will be given to the most elegant and short solution. Reference implementation A reference Python implementation will be published soon.

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Gathering Staff anyone interested?

- by kasene

Thread Title - Gathering Staff Rush-Soft Game Design is currently looking for staff of a moderate skill level. Team Name - RushSoft Game Design Project Name - N/A We are gathering staff so that we can begin working on a new game. Target Aim - Freeware / Free Version - Paid Version With our first project our aim is to simply get our name out there. Generally we will be targeting a freeware distribution platform or a Free and Paid version. Compensation - Prehaps in the future but don't rely on it If in the future we start developing a game we intend to make any sort of sizable profit from then yes, there will be compensation however currently our low, low funding comes from generous donations. Any money that we make for now will go to the teams funding for things like engine licenses and company registration. Technology - C/C++ RSETech Our primary functional language will be C/C++ as most games are. We will be using a custom built library built on Direct3D called RSETech or RushSoft Engine Technology. Currently its is fully capable of being used for developing a game. The final version is made up of almost entirely C (No C++ or OOP). There is a C++ version currently in the works. Programming: - Microsoft Visual C++ 2008 / 2010 2D Art - Photoshop CS2 - GIMP Talent Needed - We currently are in need of x2 Programmers - With understanding of the following C/C ++ and game programming aspects: -If/Else Conditions -Functions/Methods -Arrays -Pointers (You don't need to fully understand these. Just know when they need to be used.) -Enums -Loops (For and While) -Structs (and How to use . and - syntax) -Classes (and how to call methods and access variables from a class) -State Machines -Switches -Include Guards -Understanding of how game loops work in general. (Init, Update, Render, Deinit) x2 Artists - As long as you have the means to and are able to draw 2D sprites and collab with a game designer to get a good result. 1 or more Game Designers - You can design levels (for platformers) as well as write game scripts and you can come up with good ideas and game mechanics. As long as you can do these things and are able to work well with artists and programmers you're golden. Business Consultant - Someone who knows the industry and how it works. Will inquire about possible distribution platforms as well as contact other developers, websites, and publishers on RushSofts behalf. Team Structure - Kasene Clark - Co-Founder/Lead Programmer/Game Designer Casey W - Co-Founder/Artist(GC/Animation)/Game Designer Nathan Mayworm - Game Designer. Website - RushSoft Websitek Contact - Kasene Clark [email protected] - [email protected] Phone - 12075181967 Feedback - Any Thank You! -Kasene

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How do you handle EF Data Contexts combined with asp.net custom membership/role providers

- by KallDrexx

I can't seem to get my head around how to implement a custom membership provider with Entity Framework data contexts into my asp.net MVC application. I understand how to create a custom membership/role provider by itself (using this as a reference). Here's my current setup: As of now I have a repository factory interface that allows different repository factories to be created (right now I only have a factory for EF repositories and and in memory repositories). The repository factory looks like this: public class EFRepositoryFactory : IRepositoryFactory { private EntitiesContainer _entitiesContext; /// <summary> /// Constructor that generates the necessary object contexts /// </summary> public EFRepositoryFactory() { _entitiesContext = new EntitiesContainer(); } /// <summary> /// Generates a new entity framework repository for the specified entity type /// </summary> /// <typeparam name="T">Type of entity to generate a repository for </typeparam> /// <returns>Returns an EFRepository</returns> public IRepository<T> GenerateRepository<T>() where T : class { return new EFRepository<T>(_entitiesContext); } } Controllers are passed an EF repository factory via castle Windsor. The controller then creates all the service/business layer objects it requires and passes in the repository factory into it. This means that all service objects are using the same EF data contexts and I do not have to worry about objects being used in more than one data context (which of course is not allowed and causes an exception). As of right now I am trying to decide how to generate my user and authorization service layers, and have run against a design roadblock. The User/Authization service will be a central class that handles the logic for logging in, changing user details, managing roles and determining what users have access to what. The problem is, using the current methodology the asp.net mvc controllers will initialize it's own EF repository factory via Windsor and the asp.net membership/role provider will have to initialize it's own EF repository factory. This means that each part of the site will then have it's own data context. This seems to mean that if asp.net authenticates a user, that user's object will be in the membership provider's data context and thus if I try to retrieve that user object in the service layer (say to change the user's name) I will get a duplication exception. I thought of making the repository factory class a singleton, but I don't see a way for that to work with castle Windsor. How do other people handle asp.net custom providers in a MVC (or any n-tier) architecture without having object duplication issues?

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Linux policy routing - packets not coming back

- by Bugsik

i am trying to set up policy routing on my home server. My network looks like this: Host routed VPN gateway Internet link through VPN 192.168.0.35/24 ---> 192.168.0.5/24 ---> 192.168.0.1 DSL router 10.200.2.235/22 .... .... 10.200.0.1 VPN server The traffic from 192.168.0.32/27 should be and is routed through VPN. I wanted to define some routing policies to route some traffic from 192.168.0.5 through VPN as well - for start - from user with uid 2000. Policy routing is done using iptables mark target and ip rule fwmark. The problem: When connecting using user 2000 from 192.168.0.5 tcpdump shows outgoing packets, but nothing comes back. Traffic from 192.168.0.35 works fine (here I am not using fwmark but src policy). Here is my VPN gateway setup: # uname -a Linux placebo 3.2.0-34-generic #53-Ubuntu SMP Thu Nov 15 10:49:02 UTC 2012 i686 i686 i386 GNU/Linux # iptables -V iptables v1.4.12 # ip -V ip utility, iproute2-ss111117 IPtables rules (all policies in table filter are ACCEPT) # iptables -t mangle -nvL Chain PREROUTING (policy ACCEPT 770K packets, 314M bytes) pkts bytes target prot opt in out source destination Chain INPUT (policy ACCEPT 767K packets, 312M bytes) pkts bytes target prot opt in out source destination Chain FORWARD (policy ACCEPT 5520 packets, 1920K bytes) pkts bytes target prot opt in out source destination Chain OUTPUT (policy ACCEPT 782K packets, 901M bytes) pkts bytes target prot opt in out source destination 74 4707 MARK all -- * * 0.0.0.0/0 0.0.0.0/0 owner UID match 2000 MARK set 0x3 Chain POSTROUTING (policy ACCEPT 788K packets, 903M bytes) pkts bytes target prot opt in out source destination # iptables -t nat -nvL Chain PREROUTING (policy ACCEPT 996 packets, 51172 bytes) pkts bytes target prot opt in out source destination Chain INPUT (policy ACCEPT 7 packets, 432 bytes) pkts bytes target prot opt in out source destination Chain OUTPUT (policy ACCEPT 1364 packets, 112K bytes) pkts bytes target prot opt in out source destination Chain POSTROUTING (policy ACCEPT 2302 packets, 160K bytes) pkts bytes target prot opt in out source destination 119 7588 MASQUERADE all -- * vpn 0.0.0.0/0 0.0.0.0/0 Routing: # ip addr show 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master lan state UNKNOWN qlen 1000 link/ether 00:40:63:f9:c3:8f brd ff:ff:ff:ff:ff:ff valid_lft forever preferred_lft forever 3: lan: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP link/ether 00:40:63:f9:c3:8f brd ff:ff:ff:ff:ff:ff inet 192.168.0.5/24 brd 192.168.0.255 scope global lan inet6 fe80::240:63ff:fef9:c38f/64 scope link valid_lft forever preferred_lft forever 4: vpn: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 100 link/none inet 10.200.2.235/22 brd 10.200.3.255 scope global vpn # ip rule show 0: from all lookup local 32764: from all fwmark 0x3 lookup VPN 32765: from 192.168.0.32/27 lookup VPN 32766: from all lookup main 32767: from all lookup default # ip route show table VPN default via 10.200.0.1 dev vpn 10.200.0.0/22 dev vpn proto kernel scope link src 10.200.2.235 192.168.0.0/24 dev lan proto kernel scope link src 192.168.0.5 # ip route show default via 192.168.0.1 dev lan metric 100 10.200.0.0/22 dev vpn proto kernel scope link src 10.200.2.235 192.168.0.0/24 dev lan proto kernel scope link src 192.168.0.5 TCP dump showing no traffic coming back when connection is made from 192.168.0.5 user 2000 # tcpdump -i vpn tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on vpn, link-type RAW (Raw IP), capture size 65535 bytes ### Traffic from user 2000 on 192.168.0.5 ### 10:19:05.629985 IP 10.200.2.235.37291 > 10.100-78-194.akamai.com.http: Flags [S], seq 2868799562, win 14600, options [mss 1460,sackOK,TS val 6887764 ecr 0,nop,wscale 4], length 0 10:19:21.678001 IP 10.200.2.235.37291 > 10.100-78-194.akamai.com.http: Flags [S], seq 2868799562, win 14600, options [mss 1460,sackOK,TS val 6891776 ecr 0,nop,wscale 4], length 0 ### Traffic from 192.168.0.35 ### 10:23:12.066174 IP 10.200.2.235.49247 > 10.100-78-194.akamai.com.http: Flags [S], seq 2294159276, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 557451322 ecr 0,sackOK,eol], length 0 10:23:12.265640 IP 10.100-78-194.akamai.com.http > 10.200.2.235.49247: Flags [S.], seq 2521908813, ack 2294159277, win 14480, options [mss 1367,sackOK,TS val 388565772 ecr 557451322,nop,wscale 1], length 0 10:23:12.276573 IP 10.200.2.235.49247 > 10.100-78-194.akamai.com.http: Flags [.], ack 1, win 8214, options [nop,nop,TS val 557451534 ecr 388565772], length 0 10:23:12.293030 IP 10.200.2.235.49247 > 10.100-78-194.akamai.com.http: Flags [P.], seq 1:480, ack 1, win 8214, options [nop,nop,TS val 557451552 ecr 388565772], length 479 10:23:12.574773 IP 10.100-78-194.akamai.com.http > 10.200.2.235.49247: Flags [.], ack 480, win 7776, options [nop,nop,TS val 388566081 ecr 557451552], length 0

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Eclipse Helios on OS X Snow Leopard crashes frequently when editing certain PHP files

- by William

I use Eclipse Helios (Eclipse Platform: 3.6.0.I20100608-0911, Eclipse IDE for PHP Developers: 1.3.0.20100617-0520) all the time on OS X (Snow Leopard), and it seems I only run into trouble whenever I'm editing a PHP file that's part of the WordPress blogging framework. When I move my cursor to a variable or function name, that often triggers the beach ball of death. I suspect Eclipse is trying to look up that variable/function and for some reason that causes an endless loop. Sometimes it's not just variables or functions. Just today I was trying to replace all occurrences of a quoted string. Every time I clicked "Replace All", the program would freeze immediately after the string was replaced and the text cursor was moved to the replaced position. I think the moving of the text cursor is important, because I got the same result when I searched for the string (thus moving the cursor), but NOT when I searched for a nonexistent string. I tried disabling everything in my preferences related to marked occurrences, hovering, code assistance, etc. Nothing helps. I use Eclipse for all my projects, and I find that it's only WordPress projects where this happens. Here's my eclipse.ini file: -startup ../../../plugins/org.eclipse.equinox.launcher_1.1.0.v20100507.jar --launcher.library ../../../plugins/org.eclipse.equinox.launcher.cocoa.macosx_1.1.0.v20100503 -product org.eclipse.epp.package.php.product --launcher.defaultAction openFile -showsplash org.eclipse.platform --launcher.XXMaxPermSize 512m --launcher.defaultAction openFile -vmargs -Dosgi.requiredJavaVersion=1.5 -XstartOnFirstThread -Dorg.eclipse.swt.internal.carbon.smallFonts -XX:PermSize=128m -XX:MaxPermSize=128m -XX:MaxGCPauseMillis=10 -XX:MaxHeapFreeRatio=70 -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:+CMSIncrementalPacing -XX:CompileThreshold=5 -Xms128m -Xmx512m -Xss2m -Xdock:icon=../Resources/Eclipse.icns -XstartOnFirstThread -Dorg.eclipse.swt.internal.carbon.smallFonts -framework ../../../plugins/org.eclipse.osgi.services_3.2.100.v20100503.jar I have 4GB of RAM, so I don't know if the problem is I'm underutilizing my resources. Here's what I see over and over in the error log: !ENTRY org.eclipse.jface 2 0 2011-01-16 16:26:21.533 !MESSAGE Keybinding conflicts occurred. They may interfere with normal accelerator operation. !SUBENTRY 1 org.eclipse.jface 2 0 2011-01-16 16:26:21.533 !MESSAGE A conflict occurred for ALT+COMMAND+Q P: Binding(ALT+COMMAND+Q P, ParameterizedCommand(Command(org.eclipse.ui.views.showView,Show View, Shows a particular view, Category(org.eclipse.ui.category.views,Views,Commands for opening views,true), org.eclipse.ui.handlers.ShowViewHandler@2a46d1, [Lorg.eclipse.ui.internal.commands.Parameter;@18f50c2,,true), [Lorg.eclipse.core.commands.Parameterization;@1ff1855), org.eclipse.ui.defaultAcceleratorConfiguration, org.eclipse.ui.contexts.window,,cocoa,system) Binding(ALT+COMMAND+Q P, ParameterizedCommand(Command(org.eclipse.ui.views.showView,Show View, Shows a particular view, Category(org.eclipse.ui.category.views,Views,Commands for opening views,true), org.eclipse.ui.handlers.ShowViewHandler@2a46d1, [Lorg.eclipse.ui.internal.commands.Parameter;@18f50c2,,true), [Lorg.eclipse.core.commands.Parameterization;@96b40c), org.eclipse.ui.defaultAcceleratorConfiguration, org.eclipse.ui.contexts.window,,cocoa,system) !ENTRY org.eclipse.core.net 1 0 2011-01-16 16:26:22.217 !MESSAGE System property http.proxyHost has been set to 127.0.0.1 by an external source. This value will be overwritten using the values from the preferences !ENTRY org.eclipse.core.net 1 0 2011-01-16 16:26:22.217 !MESSAGE System property http.proxyPort has been set to 8888 by an external source. This value will be overwritten using the values from the preferences !ENTRY org.eclipse.core.net 1 0 2011-01-16 16:26:22.218 !MESSAGE System property https.proxyHost has been set to 127.0.0.1 by an external source. This value will be overwritten using the values from the preferences !ENTRY org.eclipse.core.net 1 0 2011-01-16 16:26:22.219 !MESSAGE System property https.proxyPort has been set to 8888 by an external source. This value will be overwritten using the values from the preferences I did some experimenting with the particular script that's giving me trouble. It's a hybrid of HTML and PHP, so Eclipse has to do both HTML and PHP validation. I wondered if the HTML validation had something to do with it, so I created a new file, copied the contents over, and messed with the doctype element. I found that if I replaced the well-formed XHTML 1.0 Strict doctype element with a generic doctype (as such: <!DOCTYPE html>), then I did not crash the program just by moving the cursor around. I set all HTML validation rules to "Ignore", but it still didn't solve my problems. For now, I'm just going to echo the doctype using PHP instead of entering it literally. That seems to prevent crashes. I notice that when I move the cursor around the document, Eclipse displays the "xpath" to my current location at the bottom of the screen. Sometimes there's a delay while it figures out my current path. Perhaps when it's validating against the Strict doctype, it has problems quickly calculating the xpath as I move the cursor around? Maybe it has a stack overflow that causes it to crash.

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paypal ipn case is not calling in paypal "pay now"

- by Ipsita Rout

paypal ipn case is not calling in paypal "pay now". In paypal button the following is set. return : "http://localhost/paypal.php?ch=return" cancel_return : "cancel_return" value="http://localhost/paypal.php?ch=cancel" notify_url : value="http://localhost/paypal.php?ch=ipn" paypal_form.php <form name="paypal" action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post"> <input type="hidden" name="cmd" value="_xclick"> <input type="hidden" name="rm" value="2"> <input type="hidden" name="no_notes" value="1"> <input type="hidden" name="custom" value="1"> <input type="hidden" name="business" value="[email protected]"> <input type="hidden" name="return" id="return" value="http://localhost/paypal.php?ch=return"> <input type="hidden" name="cancel_return" id="cancel_return" value="http://localhost/paypal.php?ch=cancel"> <input type="hidden" name="notify_url" id="notify_url" value="http://localhost/paypal.php?ch=ipn"> <input type="image" src="https://www.sandbox.paypal.com/WEBSCR-640-20110429-1/en_GB/i/btn/btn_paynow_SM.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online."> <img alt="" border="0" src="https://www.sandbox.paypal.com/WEBSCR-640-20110429-1/en_GB/i/scr/pixel.gif" width="1" height="1"> paypal.php <? include('db_connect.php'); $choice=isset($_GET['ch'])?$_GET['ch']:''; switch($choice){ case 'return': print "Thank You For Buying this product,Please Visit Again,If is there any complements Then suggest us.."; break; case 'ipn': $sql="INSERT INTO paypal(add_date) VALUES(now())"; mysql_query($sql); $x = fopen('test1.txt','w+'); $str2 = 'post data:dfydfhgfhjg'; foreach($_POST as $k=>$v){ $str2 .= $k.'--'.$v; } fwrite($x,$str2); fclose($x); break; case 'cancel': print "Thank You for visiting this site,Please inform your friend to buy products through paypal which is easy service... "; break; } ?>

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Solving Combinatory Problems with LINQ /.NET4

- by slf

I saw this article pop-up in my MSDN RSS feed, and after reading through it, and the sourced article here I began to wonder about the solution. The rules are simple: Find a number consisting of 9 digits in which each of the digits from 1 to 9 appears only once. This number must also satisfy these divisibility requirements: The number should be divisible by 9. If the rightmost digit is removed, the remaining number should be divisible by 8. If the rightmost digit of the new number is removed, the remaining number should be divisible by 7. And so on, until there's only one digit (which will necessarily be divisible by 1). This is his proposed monster LINQ query: // C# and LINQ solution to the numeric problem presented in: // http://software.intel.com/en-us/blogs/2009/12/07/intel-parallel-studio-great-for-serial-code-too-episode-1/ int[] oneToNine = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 }; // the query var query = from i1 in oneToNine from i2 in oneToNine where i2 != i1 && (i1 * 10 + i2) % 2 == 0 from i3 in oneToNine where i3 != i2 && i3 != i1 && (i1 * 100 + i2 * 10 + i3) % 3 == 0 from i4 in oneToNine where i4 != i3 && i4 != i2 && i4 != i1 && (i1 * 1000 + i2 * 100 + i3 * 10 + i4) % 4 == 0 from i5 in oneToNine where i5 != i4 && i5 != i3 && i5 != i2 && i5 != i1 && (i1 * 10000 + i2 * 1000 + i3 * 100 + i4 * 10 + i5) % 5 == 0 from i6 in oneToNine where i6 != i5 && i6 != i4 && i6 != i3 && i6 != i2 && i6 != i1 && (i1 * 100000 + i2 * 10000 + i3 * 1000 + i4 * 100 + i5 * 10 + i6) % 6 == 0 from i7 in oneToNine where i7 != i6 && i7 != i5 && i7 != i4 && i7 != i3 && i7 != i2 && i7 != i1 && (i1 * 1000000 + i2 * 100000 + i3 * 10000 + i4 * 1000 + i5 * 100 + i6 * 10 + i7) % 7 == 0 from i8 in oneToNine where i8 != i7 && i8 != i6 && i8 != i5 && i8 != i4 && i8 != i3 && i8 != i2 && i8 != i1 && (i1 * 10000000 + i2 * 1000000 + i3 * 100000 + i4 * 10000 + i5 * 1000 + i6 * 100 + i7 * 10 + i8) % 8 == 0 from i9 in oneToNine where i9 != i8 && i9 != i7 && i9 != i6 && i9 != i5 && i9 != i4 && i9 != i3 && i9 != i2 && i9 != i1 let number = i1 * 100000000 + i2 * 10000000 + i3 * 1000000 + i4 * 100000 + i5 * 10000 + i6 * 1000 + i7 * 100 + i8 * 10 + i9 * 1 where number % 9 == 0 select number; // run it! foreach (int n in query) Console.WriteLine(n); Octavio states "Note that no attempt at all has been made to optimize the code", what I'd like to know is what if we DID attempt to optimize this code. Is this really the best this code can get? I'd like to know how we can do this best with .NET4, in particular doing as much in parallel as we possibly can. I'm not necessarily looking for an answer in pure LINQ, assume .NET4 in any form (managed c++, c#, etc all acceptable).

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Amusing or Sad? Network Solutions

- by dbasnett

When I got sick my email ended up in every drug sellers email list. Some days I get over 200 emails selling everything from Viagra to Xanax. Either they don't know what my condition is or they are telling me you are a goner, might as well chill-ax and have a good time. In order to cut down on the mail being downloaded I thought I would add all of the Junk email senders from Outlook to my Network Solution mail server. Much to my amazement I could not find that import Spammers button, so I submitted a tech support request. Here is the response: Thank you for contacting Network Solutions Customer Service Department. We are committed to creating the best Customer experience possible. One of the first ways we can demonstrate our commitment to this goal is to quickly and efficiently handle your recent request. We apologize for any inconvenience this might have caused you. With regard to your concern, please be advised that we cannot import blocked senders in to you e-mail servers. An alternative option is for you to create a Custom Filter that filters unwanted e-mails. To create a Custom Filter: Open a Web browser (e.g., Netscape, Microsoft Internet Explorer, etc.). Type mail.[domain name].[ext] in the address line. Login to your Network Solutions email account. Click on the Configuration left menu tab. Click on the Custom Filter link. Type the rule name. blah, blah, blah Basically add them one at a time. "We are committed to creating the best Customer experience possible." No you are not. You are trying to squeeze every nickle you can out of me. "With regard to your concern, please be advised that we cannot import blocked senders in to you e-mail servers." Maybe I should apply for a job to write those ten complicated lines of code... Maybe I should question my choice of vendors, because if they truly "cannot" then they are to stupid to have my business. It is both amusing and sad. I'll be posting this in every forum I am a member of.

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jQuery Validation hiding or tearing down jquery Modal Dialog on submit

- by Programmin Tool

Basically when clicking the modal created submit button, and calling jQuery('#FormName').submit(), it will run the validation and then call the method assigned in the submitHandler. After that it is either creating a new modal div or hiding the form, and I don't get why. I have debugged it and noticed that after the method call in the submitHandler, the form .is(':hidden') = true and this is true for the modal div also. I'm positive I've done this before but can't seem to figure out what I've done wrong this time. The odd this is a modal div is showing up on the screen, but it's completely devoid of content. (Even after putting in random text outside of the form. It's like it's a whole new modal div) Here are the set up methods: function setUpdateTaskDiv() { jQuery("#UpdateTaskForm").validate({ errorLabelContainer: "#ErrorDiv", wrapper: "div", rules: { TaskSubject: { required: true } }, messages: { TaskSubject: { required: 'Subject is required.' } }, onfocusout: false, onkeyup: false, submitHandler: function(label) { updateTaskSubject(null); } } ); jQuery('#UpdateDiv').dialog({ autoOpen: false, bgiframe: true, height: 400, width: 500, modal: true, beforeclose: function() { }, buttons: { Submit: function() { jQuery('#UpdateTaskForm').submit(); }, Cancel: function() { ... } } }); where: function updateTaskSubject(task) { //does nothing, it's just a shell right now } Doesn't really do anything right now. Here's the html: <div id="UpdateDiv"> <div id="ErrorDiv"> </div> <form method="post" id="UpdateTaskForm" action="Calendar.html"> <div> <div class="floatLeft"> Date: </div> <div class="floatLeft"> </div> <div class="clear"> </div> </div> <div> <div class="floatLeft"> Start Time: </div> <div class="floatLeft"> <select id="TaskStartDate" name="TaskStartDate"> </select> </div> <div class="clear"> </div> </div> <div> <div class="floatLeft"> End Time: </div> <div class="floatLeft"> <select id="TaskEndDate" name="TaskEndDate"> </select> </div> <div class="clear"> </div> </div> <div> <div class="floatLeft"> Subject: </div> <div class="floatLeft"> <textarea id="TaskSubject" name="TaskSubject" cols="30" rows="10"></textarea> </div> <div class="clear"> </div> </div> <div> <input type="hidden" id="TaskId" value="" /> </div> <div class="clear"></div> </form> </div> Odd Discovery Turns out that the examples that I got this to work all had the focus being put back on the modal itself. For example, using the validator to add messages to the error div. (Success or not) Without doing this, the modal dialog apparently thinks that it's done with what it needs to do and just hides everything. Not sure exactly why, but to stop this behavior some kind of focus has to be assigned to something within the div itself.

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MVC Page not showing up, 404 not found

- by mwright

I have a very simple MVC site that is returning a 404 not found error when trying to load a page at the very beginning. I'm looking for some direction to troubleshoot this problem since there is really nothing to go on from the error message. The error I'm getting is: Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly. Requested URL: /Views/Other/Index.aspx Below I have included the code for the various pieces, routing rules are default: routes.MapRoute( "Default", // Route name "{controller}/{action}/{id}", // URL with parameters new { controller = "Home", action = "Index", id = UrlParameter.Optional} // Parameter defaults ); The site is using nested MasterPages, not sure if this is involved with the problem but trying to include as much detail as possible. I have: Controllers OtherController Views: Shared Folder: Site.Master Other Folder: Other.Master Index.aspx Site.Master Code: <%@ Master Language="C#" Inherits="System.Web.Mvc.ViewMasterPage" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title> <asp:ContentPlaceHolder ID="TitleContent" runat="server" /> </title> </head> <body> <div> <asp:ContentPlaceHolder ID="MainContent" runat="server"> </asp:ContentPlaceHolder> </div> </body> </html> Other.Master Code: <%@ Master Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewMasterPage" %> <asp:Content ID="OtherTitle" ContentPlaceHolderID="TitleContent" runat="server"> OTHER PAGE - MASTER TITLE <asp:ContentPlaceHolder ID="OtherPageTitle" runat="server"> </asp:ContentPlaceHolder> </asp:Content> <asp:Content ID="OtherContent" ContentPlaceHolderID="MainContent" runat="server"> Some other content. <asp:ContentPlaceHolder ID="PageContent" runat="server"> </asp:ContentPlaceHolder> </asp:Content> Index.aspx Code: <%@ Page Title="" Language="C#" MasterPageFile="~/Views/Other/Other.Master" Inherits="System.Web.Mvc.ViewPage" %> <asp:Content ID="IndexTitle" ContentPlaceHolderID="OtherTitle" runat="server"> Home </asp:Content> <asp:Content ID="IndexContent" ContentPlaceHolderID="OtherContent" runat="server"> Index content </asp:Content> OtherController Code namespace MVCProject.Controllers { public class OtherController : Controller { // // GET: /Member/ public ActionResult Index() { // Have also tried: // return View("Index", "Other.Master"); return View(); } } }

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Find optimal/good-enough strategy and AI for the game 'Proximity'?

- by smci

'Proximity' is a strategy game of territorial domination similar to Othello, Go and Risk. Two players, uses a 10x12 hex grid. Game invented by Brian Cable in 2007. Seems to be a worthy game for discussing a) optimal algorithm then b) how to build an AI. Strategies are going to be probabilistic or heuristic-based, due to the randomness factor, and the insane branching factor (20^120). So it will be kind of hard to compare objectively. A compute time limit of 5s per turn seems reasonable. Game: Flash version here and many copies elsewhere on the web Rules: here Object: to have control of the most armies after all tiles have been placed. Each turn you received a randomly numbered tile (value between 1 and 20 armies) to place on any vacant board space. If this tile is adjacent to any ally tiles, it will strengthen each tile's defenses +1 (up to a max value of 20). If it is adjacent to any enemy tiles, it will take control over them if its number is higher than the number on the enemy tile. Thoughts on strategy: Here are some initial thoughts; setting the computer AI to Expert will probably teach a lot: minimizing your perimeter seems to be a good strategy, to prevent flips and minimize worst-case damage like in Go, leaving holes inside your formation is lethal, only more so with the hex grid because you can lose armies on up to 6 squares in one move low-numbered tiles are a liability, so place them away from your main territory, near the board edges and scattered. You can also use low-numbered tiles to plug holes in your formation, or make small gains along the perimeter which the opponent will not tend to bother attacking. a triangle formation of three pieces is strong since they mutually reinforce, and also reduce the perimeter Each tile can be flipped at most 6 times, i.e. when its neighbor tiles are occupied. Control of a formation can flow back and forth. Sometimes you lose part of a formation and plug any holes to render that part of the board 'dead' and lock in your territory/ prevent further losses. Low-numbered tiles are obvious-but-low-valued liabilities, but high-numbered tiles can be bigger liabilities if they get flipped (which is harder). One lucky play with a 20-army tile can cause a swing of 200 (from +100 to -100 armies). So tile placement will have both offensive and defensive considerations. Comment 1,2,4 seem to resemble a minimax strategy where we minimize the maximum expected possible loss (modified by some probabilistic consideration of the value ß the opponent can get from 1..20 i.e. a structure which can only be flipped by a ß=20 tile is 'nearly impregnable'.) I'm not clear what the implications of comments 3,5,6 are for optimal strategy. Interested in comments from Go, Chess or Othello players. (The sequel ProximityHD for XBox Live, allows 4-player -cooperative or -competitive local multiplayer increases the branching factor since you now have 5 tiles in your hand at any given time, of which you can only play one. Reinforcement of ally tiles is increased to +2 per ally.)

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How do I handle calls to AudioTrack from jni without crashing?

- by icecream

I was trying to write to an AudioTrack from a jni callback, and I get a signal 7 (SIGBUS), fault addr 00000000. I have looked at the Wolf3D example for odroid and they seem to use a android.os.Handler to post a Runnable that will do an update in the correct thread context. I have also tried AttachCurrentThread, but I fail in this case also. It works to play the sound when running from the constructor even if I wrap it in a thread and then post it to the handler. When I do the "same" via a callback from jni it fails. I assume I am braeaking some rules, but I haven't been able to figure out what they are. So far, I haven't found the answer here on SO. So I wonder if anyone knows how this should be done. EDIT: Answered below. The following code is to illustrate the problem. Java: package com.example.jniaudiotrack; import android.app.Activity; import android.media.AudioFormat; import android.media.AudioManager; import android.media.AudioTrack; import android.os.Bundle; import android.os.Handler; import android.util.Log; public class JniAudioTrackActivity extends Activity { AudioTrack mAudioTrack; byte[] mArr; public static final Handler mHandler = new Handler(); /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mArr = new byte[2048]; for (int i = 0; i < 2048; i++) { mArr[i] = (byte) (Math.sin(i) * 128); } mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, 11025, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_8BIT, 2048, AudioTrack.MODE_STREAM); mAudioTrack.play(); new Thread(new Runnable() { public void run() { mHandler.post(new Runnable() { public void run() { mAudioTrack.write(mArr, 0, 2048); Log.i(TAG, "*** Handler from constructor ***"); } }); } }).start(); new Thread(new Runnable() { public void run() { audioFunc(); } }).start(); } public native void audioFunc(); @SuppressWarnings("unused") private void audioCB() { mHandler.post(new Runnable() { public void run() { mAudioTrack.write(mArr, 0, 2048); Log.i(TAG, "*** audioCB called ***"); } }); } private static final String TAG = "JniAudioTrackActivity"; static { System.loadLibrary("jni_audiotrack"); } } cpp: #include <jni.h> extern "C" { JNIEXPORT void Java_com_example_jniaudiotrack_JniAudioTrackActivity_audioFunc(JNIEnv* env, jobject obj); } JNIEXPORT void Java_com_example_jniaudiotrack_JniAudioTrackActivity_audioFunc(JNIEnv* env, jobject obj) { JNIEnv* jniEnv; JavaVM* vm; env->GetJavaVM(&vm); vm->AttachCurrentThread(&jniEnv, 0); jclass cls = env->GetObjectClass(obj); jmethodID audioCBID = env->GetMethodID(cls, "audioCB", "()V"); if (!audioCBID) { return; } env->CallVoidMethod(cls, audioCBID); } Trace snippet: I/DEBUG ( 1653): pid: 9811, tid: 9811 >>> com.example.jniaudiotrack <<< I/DEBUG ( 1653): signal 7 (SIGBUS), fault addr 00000000 I/DEBUG ( 1653): r0 00000800 r1 00000026 r2 00000001 r3 00000000 I/DEBUG ( 1653): r4 42385726 r5 41049e54 r6 bee25570 r7 ad00e540 I/DEBUG ( 1653): r8 000040f8 r9 41048200 10 41049e44 fp 00000000 I/DEBUG ( 1653): ip 000000f8 sp bee25530 lr ad02dbb5 pc ad012358 cpsr 20000010 I/DEBUG ( 1653): #00 pc 00012358 /system/lib/libdvm.so

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IIS7 FTP Setup - An error occured during the authentication process. 530 End Login failed

- by robmzd

I'm having a problem very similar to IIS 7.5 FTP IIS Manager Users Login Fail (530) on Windows Server 2008 R2 Standard. I have created an FTP site and IIS Manager user but am having trouble logging in. I could really do with getting this working with the IIS Manager user rather than by creating a new system user since I'm fairly restricted with those accounts. Here is the output when connecting locally through command prompt: C:\Windows\system32>ftp localhost Connected to MYSERVER. 220 Microsoft FTP Service User (MYSERVER:(none)): MyFtpLogin 331 Password required for MyFtpLogin. Password: *** 530-User cannot log in. Win32 error: Logon failure: unknown user name or bad password. Error details: An error occured during the authentication process. 530 End Login failed. I have followed the guide to configure ftp with iis manager authentication in iis 7 and Adding FTP Publishing to a Web Site in IIS 7 Things I have done and checked: The FTP Service is installed (along with FTP Extensibility). Local Service and Network Service have been given access to the site folder Permission has been given to the config files Granted read/write permissions to the FTP Root folder The Management Service is installed and running Enable remote connections is ticked with 'Windows credentials or IIS manager credentials' selected The IIS Manager User has been added to the server (root connection in the IIS connections branch) The new FTP site has been added IIS Manager Authentication has been added to the FTP authentication providers The IIS Manager user has been added to the IIS Manager Permissions list for the site Added Read/Write permissions for the user in the FTP Authorization Rules Here's a section of the applicationHost config file associated with the FTP site <site name="MySite" id="8"> <application path="/" applicationPool="MyAppPool"> <virtualDirectory path="/" physicalPath="D:\Websites\MySite" /> </application> <bindings> <binding protocol="http" bindingInformation="*:80:www.mydomain.co.uk" /> <binding protocol="ftp" bindingInformation="*:21:www.mydomain.co.uk" /> </bindings> <ftpServer> <security> <ssl controlChannelPolicy="SslAllow" dataChannelPolicy="SslAllow" /> <authentication> <basicAuthentication enabled="true" /> <customAuthentication> <providers> <add name="IisManagerAuth" enabled="true" /> </providers> </customAuthentication> </authentication> </security> </ftpServer> </site> ... <location path="MySite"> <system.ftpServer> <security> <authorization> <add accessType="Allow" users="MyFtpLogin" permissions="Read, Write" /> </authorization> </security> </system.ftpServer> </location> If I connect to the Site (not FTP) from my local IIS Manager using the same IIS Manager account details then it connects fine, I can browse files and change settings as I would locally (though I don't seem to have an option to upload files). Trying to connect via FTP though either through the browser or FileZilla etc... gives me: Status: Resolving address of www.mydomain.co.uk Status: Connecting to 123.456.12.123:21... Status: Connection established, waiting for welcome message... Response: 220 Microsoft FTP Service Command: USER MyFtpLogin Response: 331 Password required for MyFtpLogin. Command: PASS ********* Response: 530 User cannot log in. Error: Critical error Error: Could not connect to server I have tried collecting etw traces for ftp sessions, in the logs I get a FailBasicLogon followed by a FailCustomLogon, but no other info: FailBasicLogon SessionId={cad26a97-225d-45ba-ab1f-f6acd9046e55} | ErrorCode=0x8007052E StartCustomLogon SessionId={cad26a97-225d-45ba-ab1f-f6acd9046e55} | LogonProvider=IisManagerAuth StartCallProvider SessionId={cad26a97-225d-45ba-ab1f-f6acd9046e55} | provider=IisManagerAuth EndCallProvider SessionId={cad26a97-225d-45ba-ab1f-f6acd9046e55} EndCustomLogon SessionId={cad26a97-225d-45ba-ab1f-f6acd9046e55} FailCustomLogon SessionId={cad26a97-225d-45ba-ab1f-f6acd9046e55} | ErrorCode=0x8007052E FailFtpCommand SessionId={cad26a97-225d-45ba-ab1f-f6acd9046e55} | ReturnValue=0x8007052E | SubStatus=ERROR_DURING_AUTHENTICATION In the normal FTP logs I just get: 2012-10-23 16:13:11 123.456.12.123 - 123.456.12.123 21 ControlChannelOpened - - 0 0 e2d4e935-fb31-4f2c-af79-78d75d47c18e - 2012-10-23 16:13:11 123.456.12.123 - 123.456.12.123 21 USER MyFtpLogin 331 0 0 e2d4e935-fb31-4f2c-af79-78d75d47c18e - 2012-10-23 16:13:11 123.456.12.123 - 123.456.12.123 21 PASS *** 530 1326 41 e2d4e935-fb31-4f2c-af79-78d75d47c18e - 2012-10-23 16:13:11 123.456.12.123 - 123.456.12.123 21 ControlChannelClosed - - 0 0 e2d4e935-fb31-4f2c-af79-78d75d47c18e - If anyone has any ideas than I would be very grateful to hear them. Many thanks.

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creating executable jar file for my java application

- by Manu

public class createExcel { public void write() throws IOException, WriteException { WorkbookSettings wbSettings = new WorkbookSettings(); wbSettings.setLocale(new Locale("en", "EN")); WritableWorkbook workbook1 =Workbook.createWorkbook(new File(file), wbSettings); workbook1.createSheet("Niru ", 0); WritableSheet excelSheet = workbook1.getSheet(0); createLabel(excelSheet); createContent(excelSheet,list); workbook1.write(); workbook1.close(); } public void createLabel(WritableSheet sheet)throws WriteException { WritableFont times10pt = new WritableFont(WritableFont.createFont("D:\font\trebuct"),8); // Define the cell format times = new WritableCellFormat(times10pt); // Lets automatically wrap the cells times.setWrap(false); WritableFont times10ptBoldUnderline = new WritableFont( WritableFont.createFont("D:\font\trebuct"), 9, WritableFont.BOLD, false, UnderlineStyle.NO_UNDERLINE); timesBoldUnderline = new WritableCellFormat(times10ptBoldUnderline); sheet.setColumnView(0,15); sheet.setColumnView(1,13); // Write a few headers addCaption(sheet, 0, 0, "Business Date"); addCaption(sheet, 1, 0, "Dealer ID"); } private void createContent(WritableSheet sheet, ArrayList list) throws WriteException,RowsExceededException { // Write a few number for (int i = 1; i < 11; i++) { for(int j=0;j<11;j++){ // First column addNumber(sheet, i, j,1); // Second column addNumber(sheet, 1, i, i * i); } } } private void addCaption(WritableSheet sheet, int column, int row, String s) throws RowsExceededException, WriteException { Label label; label = new Label(column, row, s, timesBoldUnderline); sheet.addCell(label); } private void addNumber(WritableSheet sheet, int row,int column, Integer integer) throws WriteException, RowsExceededException { Number number; number = new Number(column,row, integer, times); sheet.addCell(number); } public static void main(String[] args) { JButton myButton0 = new JButton("Advice_Report"); JButton myButton1 = new JButton("Position_Report"); JPanel bottomPanel = new JPanel(); bottomPanel.add(myButton0); bottomPanel.add(myButton1); myButton0.addActionListener(this); myButton1.addActionListener(this); createExcel obj=new createExcel(); obj.setOutputFile("c;\\temp\\swings\\jack.xls"); try{ obj.write(); }catch(Exception e){} } and so on. it working fine. i have jxl.jar and ojdbc14.jar files(need this jar file for Excelsheet creation and DB connection )and createExcel.class(.class file) file. how to make this code as executable jar file.

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PayPal sandbox Buy Now Problem

- by Tushar Ahirrao

Hi , I have paypal sandbox test account. I want to create a 'buy Now' button. I am trying it with GWT. But its even not working with simple HTML form. It displays a 'Buy Now' button on HTML page and after clicking on it redirects to PayPal site. Where it ask to login to buy product but after that it goes on displying message: The email address or password you have entered does not match our records. Please try again. I am using buyer user to purchase product. I am pretty sure about the username and password. Providing here the simple HTML form which I am trying: <form action="https://www.paypal.com/cgi-bin/webscr" method="post" id="payPalForm"> <input type="hidden" name="item_number" value="1"> <input type="hidden" name="cmd" value="_xclick"> <input type="hidden" name="no_note" value="1"> <input type="hidden" name="business" value="[email protected]"> <input type="hidden" name="lc" value="US"> <input type="hidden" name="button_subtype" value="services"> <input type="hidden" name="cn" value="Add special instructions to the seller"> <input type="hidden" name="no_shipping" value="2"> <input type="hidden" name="rm" value="1"> <input type="hidden" name="bn" value="PP-BuyNowBF:btn_paynow_SM.gif:NonHosted"> <input type="hidden" name="variables" value="http://google.com"> <input type="hidden" name="cancel_return" value="http://google.com"> <input type="hidden" name="notify_url" value="http://google.com"> <input type="hidden" name="return" value="http://freelanceswitch.com/payment-complete /"> <input type="hidden" name="currency_code" value="USD"> <input name="item_name" type="hidden" value="Deal Name"> <input name="amount" type="hidden" value="500"> <input type="submit" name="Submit" value="Submit"> </form> Please advice. Thank you.

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Is there any way that an export-to-Excel function can be scalable?

- by MusiGenesis

Summary: ASP.Net website with a couple hundred users. Data is exported to Excel files which can be relatively large (~5 MB). In the pilot phase (just a few users), we are already seeing occasional errors on the server in the exporting method. Here's the stack trace: System.Web.HttpUnhandledException: Exception of type 'System.Web.HttpUnhandledException' was thrown. --- System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown. at System.IO.MemoryStream.set_Capacity(Int32 value) at System.IO.MemoryStream.EnsureCapacity(Int32 value) at System.IO.MemoryStream.Write(Byte[] buffer, Int32 offset, Int32 count) at MS.Internal.IO.Packaging.TrackingMemoryStream.Write(Byte[] buffer, Int32 offset, Int32 count) at MS.Internal.IO.Packaging.SparseMemoryStream.WriteAndCollapseBlocks(Byte[ ] buffer, Int32 offset, Int32 count) at MS.Internal.IO.Packaging.SparseMemoryStream.Write(Byte[] buffer, Int32 offset, Int32 count) at MS.Internal.IO.Packaging.CompressEmulationStream.Write(Byte[] buffer, Int32 offset, Int32 count) at MS.Internal.IO.Packaging.CompressStream.Write(Byte[] buffer, Int32 offset, Int32 count) at MS.Internal.IO.Zip.ProgressiveCrcCalculatingStream.Write(Byte[] buffer, Int32 offset, Int32 count) at MS.Internal.IO.Zip.ZipIOModeEnforcingStream.Write(Byte[] buffer, Int32 offset, Int32 count) at System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder) at System.IO.StreamWriter.Write(String value) at System.Xml.XmlTextEncoder.Write(String text) at System.Xml.XmlTextWriter.WriteString(String text) at System.Xml.XmlText.WriteTo(XmlWriter w) at System.Xml.XmlAttribute.WriteContentTo(XmlWriter w) at System.Xml.XmlAttribute.WriteTo(XmlWriter w) at System.Xml.XmlElement.WriteTo(XmlWriter w) at System.Xml.XmlElement.WriteContentTo(XmlWriter w) at System.Xml.XmlElement.WriteTo(XmlWriter w) at System.Xml.XmlElement.WriteContentTo(XmlWriter w) at System.Xml.XmlElement.WriteTo(XmlWriter w) at System.Xml.XmlElement.WriteContentTo(XmlWriter w) at System.Xml.XmlElement.WriteTo(XmlWriter w) at System.Xml.XmlDocument.WriteContentTo(XmlWriter xw) at System.Xml.XmlDocument.WriteTo(XmlWriter w) at System.Xml.XmlDocument.Save(Stream outStream) at OfficeOpenXml.ExcelWorksheet.Save() in C:\temp\XXXXXXXXXX\ExcelPackage\ExcelWorksheet.cs:line 605 at OfficeOpenXml.ExcelWorkbook.Save() in C:\temp\XXXXXXXXXX\ExcelPackage\ExcelWorkbook.cs:line 439 at OfficeOpenXml.ExcelPackage.Save() in C:\temp\XXXXXXXXXX\ExcelPackage\ExcelPackage.cs:line 348 at Framework.Exporting.Business.ExcelExport.BuildReport(HttpContext context) at WebUserControl.BtnXLS_Click(Object sender, EventArgs e) in C:\TEMP\XXXXXXXXXX\XXXXXXXXXX\OneList\UserControls\TicketReportExporter. ascx.cs:line 108 at System.Web.UI.WebControls.Button.OnClick(EventArgs e) at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) at System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.Rai sePostBackEvent(String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) --- End of inner exception stack trace --- at System.Web.UI.Page.HandleError(Exception e) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest() at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) at System.Web.UI.Page.ProcessRequest(HttpContext context) at ASP.XXXXXXXXXXX_aspx.ProcessRequest(HttpContext context) in c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\XXXX\cdf32a52\d1a5eabd\App_Web_enxdwlks.1.cs:line 0 at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpAppli cation.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) Even aside from this particular problem, in general exporting to Excel requires the instantiation of huge Excel objects on the server for each request, which I've always assumed to mean disqualifies Excel for "serious" work on a highly-loaded server. Is there any general way to export to Excel in a "light-weight" manner? Would simply streaming the data into a CSV file work for this?

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.NET C# Filestream writing to file and reading the bfile

- by pythonrg7

I have a web service that checks a dictionary to see if a file exists and then if it does exist it reads the file, otherwise it saves to the file. This is from a web app. I wonder what is the best way to do this because I occasionally get a FileNotFoundException exception if the same file is accessed at the same time. Here's the relevant parts of the code: String signature; signature = "FILE," + value1 + "," + value2 + "," + value3 + "," + value4; // this is going to be the filename string result; MultipleRecordset mrSummary = new MultipleRecordset(); // MultipleRecordset is an object that retrieves data from a sql server database if (mrSummary.existsFile(signature)) { result = mrSummary.retrieveFile(signature); } else { result = mrSummary.getMultipleRecordsets(System.Configuration.ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString.ToString(), value1, value2, value3, value4); mrSummary.saveFile(signature, result); } Here's the code to see if the file already exists: private static Dictionary dict = new Dictionary(); public bool existsFile(string signature) { if (dict.ContainsKey(signature)) { return true; } else { return false; } } Here's what I use to retrieve if it already exists: try { byte[] buffer; FileStream fileStream = new FileStream(@System.Configuration.ConfigurationManager.AppSettings["CACHEPATH"] + filename, FileMode.Open, FileAccess.Read, FileShare.Read); try { int length = 0x8000; // get file length buffer = new byte[length]; // create buffer int count; // actual number of bytes read JSONstring = ""; while ((count = fileStream.Read(buffer, 0, length)) > 0) { JSONstring += System.Text.ASCIIEncoding.ASCII.GetString(buffer, 0, count); } } finally { fileStream.Close(); } } catch (Exception e) { JSONstring = "{\"error\":\"" + e.ToString() + "\"}"; } If the file doesn't previously exist it saves the JSON to the file: try { if (dict.ContainsKey(filename) == false) { dict.Add(filename, true); } else { this.retrieveFile(filename, ipaddress); } } catch { } try { TextWriter tw = new StreamWriter(@System.Configuration.ConfigurationManager.AppSettings["CACHEPATH"] + filename); tw.WriteLine(JSONstring); tw.Close(); } catch { } Here are the details to the exception I sometimes get from running the above code: System.IO.FileNotFoundException: Could not find file 'E:\inetpub\wwwroot\cache\FILE,36,36.25,14.5,14.75'. File name: 'E:\inetpub\wwwroot\cache\FILE,36,36.25,14.5,14.75' at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy) at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share) at com.myname.business.MultipleRecordset.retrieveFile(String filename, String ipaddress)

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Debugging site written mainly in JScript with AJAX code injection

- by blumidoo

Hello, I have a legacy code to maintain and while trying to understand the logic behind the code, I have run into lots of annoying issues. The application is written mainly in Java Script, with extensive usage of jQuery + different plugins, especially Accordion. It creates a wizard-like flow, where client code for the next step is downloaded in the background by injecting a result of a remote AJAX request. It also uses callbacks a lot and pretty complicated "by convention" programming style (lots of events handlers are created on the fly based on certain object names - e.g. current page name, current step name). Adding to that, the code is very messy and there is no obvious inner structure - the functions are scattered in the code, file names do not reflect the business role of the code, lots of functions and code snippets are most likely not used at all etc. PROBLEM: How to approach this code base, so that the inner flow of the code can be sort-of "reverse engineered" using a suite of smart debugging tools. Ideally, I would like to be able to attach to the running application and step through the code, breaking on each new function call. Also, it would be nice to be able to create a "diagram of calls" in the application (i.e. in order to run a particular page logic, this particular flow of function calls was executed in a particular order). Not to mention to be able to run a coverage analysis, identifying potentially orphaned code fragments. I would like to stress out once more, that it is impossible to understand the inner logic of the application just by looking at the code itself, unless you have LOTS of spare time and beer crates, which I unfortunately do not have :/ (shame...) An IDE of some sort that would aid in extending that code would be also great, but I am currently looking into possibility to use Visual Studio 2010 to do the job, as the site itself is a mix of Classic ASP and ASP.NET (I'd say - 70% Java Script with jQuery, 30% ASP). I have obviously tried FireBug, but I was unable to find a way to define a breakpoint or step into the code, which is "injected" into the client JS using AJAX calls (i.e. the application retrieves the code by invoking an URL and injects it to the client local code). Venkman debugger had similar issues. Any hints would be welcome. Feel free to ask additional questions.

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One entityManger finds entity , the other does not.

- by Pitelk

Hi all, I have a very strange behavior in my program. I have 2 classes (class LogIn and CreateGame) where i have injected an EntityManager in each using the annotation @PersistenceContext(unitName="myUnitPU") EntityManager entitymanger; In some point i remove an object called "user" from the database using entitymanger.remove(user) from a method in LogIn class. The business logic is that a user can host and join games ( in the same time) so removing the user all the entries in database about the games the user has created are removed and all the entries showing in which games the user has joined are removed also. After that, i call another function which checks if the user exists using a method in the LogIn class entitymanager.find(user) which surprisingly enough, finds the user. After that I call a method in CreateGame class which tries to find the user by using again entitymanger.find(user) the entitymanger in that class fails to find the user (which is the expected result as the user is removed and it's not in the database) So the question is : Why the entitymanager in one class finds the user (which is wrong) where the other doesn't find it? Does anyone has ever the same problem? PS : This "bug" occurs when the user has hosted a game which is joined by another user (lets call him Buser) and the Buser has made a game which is joined by the current user. GAME | HOST | CLIENTS game1 | user | userB game2 | userB | user where in this case by removing the user, the game1 is deleted and the user is removed from game2 so the result is GAME | HOST | CLIENTS game2 | userB | PS2 : The Beans are EJB3.0. The methods are called from a delegate class. The beans in the delegate class are instantiated using the InitialContext.lookup() method. Note that for logging in ,creating , joining games the appropriate delegate class calls the correspondent EJB which does the transactions. In the case of logOut, the delegate calls an EJB to logout the user but becuase other stuff must be done (as said above) this EJB calls other EJB (again using lookup() ) which has methods like removegame(), removeUserFromGame() etc. After those methods are executed the user is then logged out. Maybe it has something to do with the fact the the first entity manager is called by a delegate but the second from inside an EJb and thats why the one entitymanger can see the non-existent user while the other cannot? Also all the methods have TRANSACTIONTYPE.REQUIRED Thank you in advance

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OSX Server 3, Mac clients binding to OD and Profile Manager failing

- by dbf

I've made a setup containing a Mac Mini with OSX Server 3 (Mavericks 10.9.2) using Open Directory and Profile Manager (Mail, etc all set up and working). Now the thing is, internally on the local network, everything works great. Clients can bind to the OD and the users are able to login. I can install trust and settings profiles (either custom or group profiles) and all services in the profiles mentioned are being configured correctly. I can log in and out, hump around and do it a 100 times on different macs with different users, it works. My goal is to make this service publicly. The domain is with a FQDN which I own, for simplicity let's say server.domain.com. Now the only way for me to bind the clients to the OD is using LDAP mapping RCF2307 (without SSL) and a DN suffix of dc=server,dc=domain,dc=com using the Directory Utility. The options from server, or open directory will throw several errors like Connection failed to node '/LDAPv3/server.domain.com (2100). First of all I don't really understand the problem why clients can't bind to the OD like it does locally, with and without SSL (all ports are open, literally all ports are open, not just 389,636 and 1640, wasn't sure if I was missing any). When the clients are using LDAP mapping RFC2307 to bind (without SSL only), clients are able to authenticate, login and even load the Trust profile. But every Settings profile will fail with a Debug Message: Unable to find GUID in user record OD or fail to install saying missing user identification. Is there any way to get this to work without RFC2307? Because there is quite some stuff missing when using RFC2307 and not pull the mapping from the server or use open directory. Is this setup even possible? Or should I use VPN to authenticate with the OD? The network setup is a Modem/Router (DHCP off) with WAN NATted to an Airport Extreme (Using DHCP+NAT). The AE does notify with a double NAT message but I haven't had any problems with it on any other service. So WAN - 192.168.2.220 (static), AE - 10.0.1.* (dhcp) Output of DIG from the outside using dig server.domain.com ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;server.domain.com. IN A ;; ANSWER SECTION: server.domain.com. 77 IN A 91.50.*.* (valid WAN IP) ;; SERVER 172.*.*.1#53(172.*.*.1) (iPhone) DIG locally from a client and server (same output) ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 0 ;; QUESTION SECTION: ;server.domain.com. IN A ;; ANSWER SECTION: server.domain.com. 10800 IN A 10.0.1.11 ;; AUTHORITY SECTION: server.domain.com. 10800 IN NS domain.com. (used for email send in relay) server.domain.com. 10800 IN NS server.domain.com. ;; SERVER 10.0.1.11#53(10.0.1.11) Are there any things I should check? Only have OSX. -- double NAT issue, plugged in the server directly on the Modem/Router with a static IP and issue remains. Guess that rules out the double NAT thing. -- changeip -checkhostname comes with There is nothing to change, e.g. success. Primary address = 10.0.1.11 Current HostName = server.domain.com DNS HostName = server.domain.com For now, I've made a workaround by using an admin account that forces a permanent VPN connection on boot. That means before it comes to the login, a connection is already made or underway. I will continue this post when I have more time, also locating all the necessary .log files of each application involved. I have some suspicions but have to debug a bit more when I have more time on my hands .. Unless, of course, I get sidetracked with having a life. Which is arguably not very likely. krypted.com

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