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Articles indexed in March 2012

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• Animate screen while loading textures

  - by Omega

  My RPG-like game has random battles. When the player enters a random battle, it is necessary for my game to load the textures used within that battle (animated monsters, animations, etc). The textures are quite a lot, and rather big (the battles are very graphical intensive). Such process consumes significant time. And while it is loading, the whole screen freezes. The game's map freezes, and the wait time is significant - I personally find it annoying. I can't afford to preload the textures because, after doing some math, I realized: If I preload all the textures at the beginning of the game, the application will definitely crash. If I preload the textures that are used in a specific map when the player enters the map, the application is very likely to crash as well. I can only afford to load the textures when I need them, and dispose of them as soon as the battle ends. I'd prefer to not use a "loading screen" image because it affects my game's design and concept. I want to avoid this approach. If I could do some kind of animation while loading the textures, it would be great, which leads to my question: is that possible? What kind of animation, you ask? Well, how about... you remember when Final Fantasy used to distort the screen while apparently loading the textures? Something like that. But well, distorting is quite a time-consuming process as well, so maybe just a cool frame-by-frame animation or something. While writing this, I realized that I could make small pauses between textures (there are multiple textures), and during such pauses, I update the screen to represent the animation's state. However, this is very unlikely to happen, because each texture is 2048x2048, so the animation would be refreshed at a rather laggy (and annoying) rate. I'd prefer to avoid this as well.

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• Timeout Exceptions

  - by Raihan Jamal

  This is my below code, I am confuse why this thing is happening. In this code getLocationByIpTimeout is a method in which I am passing two things- one is the ip address and second is the timeout. So I will get the timeout exception if the response is not getting back in under 5 ms. So when I ran this below code, I am getting few timeout exceptions but the most important thing that I am confuse is if I am getting timeout exceptions (time taken to get the response is greater than 5 ms) then why the program is entering in that if loop in which I am having difference 5. What can be the possible reason for this? It is because of catch block?? Any suggestions will be appreciated. long runs =10000; long difference = 0; while(runs > 0) { String ipAddress = generateIPAddress(); long start_time = System.nanoTime(); try { resp = PersonalizationGeoLocationServiceClientHelper.getLocationByIpTimeout(ipAddress, 5); } catch (TimeoutException e) { System.out.println("Timeout Exception"); } long end_time = System.nanoTime(); if(resp == null || (resp.getLocation() == null)) { difference = 0; } else if(resp.getLocation() != null) { difference = (end_time - start_time)/1000000; } if(difference> 5) { System.out.println("Debug"); } }

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• mEncrypt/Decrypt binary mp3 with mcrypt, missing mimetype

  - by Jeremy Dicaire

  I have a script that read a mp3 file and encrypt it, I want to be able to decrypt this file and convert it to base64 so it can play in html5. Key 1 will be stored on the page and static, key2 will be unique for each file, for testing I used: $key1 = md5(time()); $key2 = md5($key1.time()); Here is my encode php code : //Get file content $file = file_get_contents('test.mp3'); //Encrypt file $Encrypt = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key1, $file, MCRYPT_MODE_CBC, $key2); $Encrypt = trim(base64_encode($Encrypt)); //Create new file $fileE = "test.mp3e"; $fileE = fopen($file64, 'w') or die("can't open file"); //Put crypted content fwrite($fileE, $Encrypt); //Close file fclose($fileE); Here is the code that doesnt work (decoded file is same size, but no mimetype): //Get file content $fileE = file_get_contents('test.mp3e'); //Decode $fileDecoded = base64_decode($fileE); //Decrypt file $Decrypt = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key1, $fileDecoded, MCRYPT_MODE_CBC, $key2); $Decrypt = trim($Decrypt); //Create new file $file = "test.mp3"; $file = fopen($file, 'w') or die("can't open file"); //Put crypted content fwrite($file, $Decrypt); //Close file fclose($file);

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• reverse proxy not rewriting to https

  - by polishpt

  I need your help. I'm having problems with reverse proxy rewriting to https: I have an alfresco app running on top of tomcat and as a front and an Apache server - it's site-enabled looks like that: <VirtualHost *:80> ServerName alfresco JkMount /* ajp13_worker <Directory /var/www/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> ErrorLog /var/log/apache2/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /var/log/apache2/access.log combined ServerSignature Off </VirtualHost> I also have a reverse proxy server running on second machine and i want it to rewrite queries to https. It's site-enabled looks like that: <VirtualHost 192.168.251.50:80> ServerName alfresco DocumentRoot /var/www/ RewriteEngine on RewriteRule (.*) https://alfresco/ [R] LogLevel warn ErrorLog /var/log/apache2/alfresco-80-error.log CustomLog /var/log/apache2/alfresco-80-access.log combined ServerSignature Off </VirtualHost> <VirtualHost 192.168.251.50:443> ServerName alfresco DocumentRoot /var/www/ SSLEngine On SSLProxyEngine On SSLCertificateFile /etc/ssl/certs/alfresco.pem SSLCertificateKeyFile /etc/ssl/private/alfresco.key SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unclean-shutdown \ downgrade-1.0 force-response-1.0 ProxyRequests Off ProxyPreserveHost On <Proxy *> Order deny,allow Allow from all </Proxy> ProxyPass /alfresco http://192.168.251.50:8080/alfresco ProxyPassReverse /alfresco http://192.168.251.50:8080/alfresco LogLevel warn ErrorLog /var/log/apache2/alfresco-443-error.log CustomLog /var/log/apache2/alfresco-443-access.log combined ServerSignature Off </VirtualHost> Now, ProxyPass works, when I go to alfresco/alfrsco in a browser application opens, but rewriting to https doesn't work. Plese help. Regards when I go to 192.168.251.50 Tomcat configuration page shows up. When I go to 192.268.251.50:8080 - the same as above when I go to 192.168.251.50:8080/alfresco - alfresco app page shows app when I go to alfresco/alfresco - same as above when i go to https://alfresco or https://alfresco i get an error connecting to a server

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• Juniper NetScreen NS-5GT traffic monitoring

  - by blah

  I've done casual research into the subject and am truly dismayed at the lack of compatible tools for such a simple task. Maybe someone can provide assistance. We have a NetScreen NS-5GT in the office. I need to be able to get a glance of current traffic per endpoint -- I think the equivalent of 'get sessions' with byte counts/rates. I don't care about bars, graphs, and reports. Something as simple as a classic software firewall display would be perfect. I can't shell out money on something real like SolarWinds products, so a free solution is essential. I'm willing to do a little work but refuse to program something from scratch. It's not prudent right now for me to install a hub or otherwise mess around physically. There must be something out there I can use, maybe in combination. I don't believe I'm asking too much. Specific answers only please, e.g. monitoring software you know will actually work with this antiquated device. I've read about general approaches to the broader problem dozens of times already.

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• Need help with yum,python and php in CentOS. (I made a complete mess!)

  - by pek

  a while back I wanted to install some plugins for Trac but it required python 2.5 I tried installing it (I don't remember how) and the only thing I managed was to have two versions of python (2.4 and 2.5). Trac still uses the old version but the console uses 2.5 (python -V = Python 2.5.2). Anyway, the problem is not python, the problem is yum (which uses python). I am trying to upgrade my PHP version from 5.1.x to 5.2.x. I tried following this tutorial but when I reach the step with yum I get this error: >[root@XXX]# yum update Loading "installonlyn" plugin Setting up Update Process Setting up repositories Reading repository metadata in from local files Traceback (most recent call last): File "/usr/bin/yum", line 29, in ? yummain.main(sys.argv[1:]) File "/usr/share/yum-cli/yummain.py", line 94, in main result, resultmsgs = base.doCommands() File "/usr/share/yum-cli/cli.py", line 381, in doCommands return self.yum_cli_commands[self.basecmd].doCommand(self, self.basecmd, self.extcmds) File "/usr/share/yum-cli/yumcommands.py", line 150, in doCommand return base.updatePkgs(extcmds) File "/usr/share/yum-cli/cli.py", line 672, in updatePkgs self.doRepoSetup() File "/usr/share/yum-cli/cli.py", line 109, in doRepoSetup self.doSackSetup(thisrepo=thisrepo) File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 338, in doSackSetup self.repos.populateSack(which=repos) File "/usr/lib/python2.4/site-packages/yum/repos.py", line 200, in populateSack sack.populate(repo, with, callback, cacheonly) File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 91, in populate dobj = repo.cacheHandler.getPrimary(xml, csum) File "/usr/lib/python2.4/site-packages/yum/sqlitecache.py", line 100, in getPrimary return self._getbase(location, checksum, 'primary') File "/usr/lib/python2.4/site-packages/yum/sqlitecache.py", line 86, in _getbase (db, dbchecksum) = self.getDatabase(location, metadatatype) File "/usr/lib/python2.4/site-packages/yum/sqlitecache.py", line 82, in getDatabase db = self.makeSqliteCacheFile(filename,cachetype) File "/usr/lib/python2.4/site-packages/yum/sqlitecache.py", line 245, in makeSqliteCacheFile self.createTablesPrimary(db) File "/usr/lib/python2.4/site-packages/yum/sqlitecache.py", line 165, in createTablesPrimary cur.execute(q) File "/usr/lib/python2.4/site-packages/sqlite/main.py", line 244, in execute self.rs = self.con.db.execute(SQL) _sqlite.DatabaseError: near "release": syntax error Any help? Thank you. Update OK, so I've managed to update yum hoping it would solve my problems but now I get a slightly different version of the same error: [root@XXX]# yum -y update Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * addons: mirror.skiplink.com * base: www.gtlib.gatech.edu * epel: mirrors.tummy.com * extras: yum.singlehop.com * updates: centos-distro.cavecreek.net (process:30840): GLib-CRITICAL **: g_timer_stop: assertion `timer != NULL' failed (process:30840): GLib-CRITICAL **: g_timer_destroy: assertion `timer != NULL' failed Traceback (most recent call last): File "/usr/bin/yum", line 29, in ? yummain.user_main(sys.argv[1:], exit_code=True) File "/usr/share/yum-cli/yummain.py", line 309, in user_main errcode = main(args) File "/usr/share/yum-cli/yummain.py", line 178, in main result, resultmsgs = base.doCommands() File "/usr/share/yum-cli/cli.py", line 345, in doCommands self._getTs(needTsRemove) File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 101, in _getTs self._getTsInfo(remove_only) File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 112, in _getTsInfo pkgSack = self.pkgSack File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 661, in <lambda> pkgSack = property(fget=lambda self: self._getSacks(), File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 501, in _getSacks self.repos.populateSack(which=repos) File "/usr/lib/python2.4/site-packages/yum/repos.py", line 260, in populateSack sack.populate(repo, mdtype, callback, cacheonly) File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 190, in populate dobj = repo_cache_function(xml, csum) File "/usr/lib/python2.4/site-packages/sqlitecachec.py", line 42, in getPrimary self.repoid)) TypeError: Can not create packages table: near "release": syntax error I'm guessing that this "release" thing has something to do with a repository, but I didn't find anything... I went to the sqlitecachec.py at line 42 which writes (line numbers added for convenience): 39: return self.open_database(_sqlitecache.update_primary(location, 40: checksum, 41: self.callback, 42: self.repoid)) Update 2 I think I found the problem. This post suggests that the problem is sqlite and not yum. The version of sqlite I have installed is 3.6.10 but I have no idea which version does python 2.4 uses. ld.so.config contains the following: include ld.so.conf.d/*.conf /usr/local/lib In folder /usr/local/lib I find a symbolic link named libsqlite3.so that points to libsqlite3.so.0.8.6 WHAT IS HAPPENING??????? :S

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• How to handle OpenVPN client as a service, when the laptop is physically on the network already?

  - by James

  The Setup I've gotten OpenVPN working on our Windows XP laptops. Users are limited, so I went ahead and set OpenVPN client to run as a service, which is great anyway because that means they are on the VPN before logging in, so login scripts work, plus we can do remote support even if the user can not log in (such as connecting via VNC or resetting passwords). It is also configured to send all traffic over the tunnel, so when, for example, they browse the internet it is just like browsing from our corporate network. The Qestion(s) So, I'm wondering how does the OpenVPN client act when the computer is already physically on the same network as the OpenVPN server? Right now, the client is configured to connect the the public dns name which will resolve to the public ip address which will NOT get reflected back to the OpenVPN server, so it is affectively blocked from connecting to the OpenVPN server while on the network. Is that a good thing? Or will it constantly try to connect, using up system resources and network resources? We will likely have hundreds of laptops regularly on the physical network with this, so it could contribute to a lot of unnecessary network chatter. Alternatively Would it be better to have the firewall reflect the port back to the OpenVPN server and let it connect? Or have our internal dns resolve the name to the private ip and allow them to connect directly? Would traffic then go over the vpn connection (which I do not want, when already on the physical network)? Or is it possible to tell it to ignore the connection when the client and server are already on the same network? TLDR What's a sane way of handling OpenVPN client running as an always-on service when the client and server will often be on the same network?

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• IMAP/POP won't send allow emails to outside- New Dell PowerEdge T310 running SBS 2011

  - by user779887

  I have a brand new out of the box Dell PowerEdge T310 running SBS 2011. Our employees at our remote offices can't send emails to recipients outside of our own domain. The workstations at the same location as the server aren't having any problem. I would at this time like to say "Thanks a lot" to the super-minds at Microsoft for protecting our email server from rogue computers attempting to send fake emails. (Silly me I thought proper login and password conventions would handle that.) I know this is something dealing with relaying but thus far nothing from any posts I've read have changed anything. Honestly, if someone is crafty enough to guess one of our login/password combos, let them send emails through our server I don't care!

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• Windows 7 - SBS - Why does copying a directory not include all subdirectories and files?

  - by indeed005

  Using Windows 7, fully updated... I have had some strange behaviour copying a whole user directory (e.g. "c:\users\bob" to "c:\backups\bob") I understand now that I should have used Easy Transfer or at least robocopy, but at the time all I wanted to do was backup the user's data before using the "Delete account" button. Unfortunately, I didn't check that my copy-paste had actually worked; all it had actually done was copied the appdata subdirectory of the user account. At the time of doing this backup I was logged in as the same user, bob (a local admin) in this example. When I discovered the missing files, I tried again using the domain admin account -- same story. Only appdata copied. No documents folders, nothing else. Then my boss tried, and it worked fine -- it copied all the files. Ctrl+C, Ctrl+V. I tried again... same profile... copied all the files. Same profile, same destination, same rights and permissions, same ownership, but different behaviour. Has anyone encountered this before and come up with a solution? BTW this was not using roaming profiles and the accounts are stored locally.

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• How to use the correct SSH private key?

  - by Dail

  I have a private key inside /home/myuser/.ssh/privateKey I have a problem connecting to the ssh server, because i always get: Permission denied (publickey). I tried to debug the problem and i find that ssh is reading wrong file, take a look at the output: [damiano@Damiano-PC .ssh]$ ssh -v root@vps1 OpenSSH_5.8p2, OpenSSL 1.0.0g-fips 18 Jan 2012 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for vps1 debug1: Applying options for * debug1: Connecting to 111.111.111.111 [111.111.111.111] port 2000. debug1: Connection established. debug1: identity file /home/damiano/.ssh/id_rsa type -1 debug1: identity file /home/damiano/.ssh/id_rsa-cert type -1 debug1: identity file /home/damiano/.ssh/id_dsa type -1 debug1: identity file /home/damiano/.ssh/id_dsa-cert type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.8p1 Debian-7ubuntu1 debug1: match: OpenSSH_5.8p1 Debian-7ubuntu1 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.8 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-ctr hmac-md5 none debug1: kex: client->server aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Server host key: RSA 74:8f:87:fe:b8:25:85:02:d4:b6:5e:03:08:d0:9f:4e debug1: Host '[111.111.111.111]:2000' is known and matches the RSA host key. debug1: Found key in /home/damiano/.ssh/known_hosts:1 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: Roaming not allowed by server debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey debug1: Next authentication method: publickey debug1: Trying private key: /home/damiano/.ssh/id_rsa debug1: Trying private key: /home/damiano/.ssh/id_dsa debug1: No more authentication methods to try. as you can see ssh is trying to read: /home/damiano/.ssh/id_rsa but i don't have this file, i named it differently. How could I tell to SSH to use the correct private key file? Thanks!

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• The OLE DB provider "SQLNCLI10.1" has not been registered.; 42000

  - by lankylad

  I have a SQL Server 2008 Analysis Services Project. In the Data Source View I have a Named Query which references a single Data Source containing three tables. The Project processes successfully and the cube can be browsed. I recently added a second Data Source to the Data Source View and linked a table to the original Named Query. When I try to process the project, I get the message: OLE DB error: OLE DB or ODBC error: The OLE DB provider "SQLNCLI10.1" has not been registered.; 42000. The Connection String for both Data Sources uses SQLNCLI10.1

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• forward mails from sendmail + mimedefang on two unix boxes

  - by SWKK

  I am not a unix expert, more like a novice. I have one user account replicated on two unix boxes receiving same mails on both boxes for fail over. Sendmail has mimedefang utility running to process these mails. After all the processing is complete, more like weeding the spam, viruses etc. I need to forward these mails coming to the same account on both boxes to goto a central mailbox on MS Exchange for this account. Problem is I am using .forward file hence both unix boxes forward the mail after processing. I just want to be able to ignore one of the two mails. Has anyone tried something similar? any directions? Please?

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• Apache2 Virtual Host with ScriptAlias returning 403

  - by sissonb

  I am trying to reference my libs directory which is a sibling directory to my DocumentRoot. I am using the following ScriptAlias to try to accomplish this. ScriptAlias /libs/ "../libs" But when I go to example.com/libs/ I get a the following error Forbidden You don't have permission to access /libs/ on this server I am able to view the libs directory using the following configuration so I don't think it's a file permission error. <VirtualHost *> ServerName example.com ServerAlias www.example.com DocumentRoot C:/www/libs <VirtualHost *> More relevant httpd.cong setting below <Directory /> Options FollowSymLinks AllowOverride None Order deny,allow Deny from all </Directory> <Directory "C:/www"> Options Indexes FollowSymLinks AllowOverride None Order Deny,Allow Deny from none Allow from all </Directory> NameVirtualHost * <VirtualHost *> ServerName example.com ServerAlias www.example.com DocumentRoot C:/www/example ScriptAlias /libs/ "../libs" <Directory "C:/www/libs"> Options Indexes FollowSymLinks AllowOverride None Options +ExecCGI Order Deny,Allow Deny from none Allow from all </Directory> </VirtualHost>

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• socket connection failed, telnet OK

  - by cf16

  my problem is that I can't connect two comps through socket (windows xp and windows7) although the server created with socket is listening and I can telnet it. It receives then information and does what should be done, but if I run the corresponding socket client I get error 10061. Moreover I am behind firewall - these two comps are running within my LAN, the windows firewalls are turned off, comp1: 192.168.1.2 port 12345 comp1: 192.168.1.6 port 12345 router: 192.168.1.1 Maybe port forwarding could help? But most important for me is to answer why Sockets fail if telnet works fine. client: int main(){ // Initialize Winsock. WSADATA wsaData; int iResult = WSAStartup(MAKEWORD(2,2), &wsaData); if (iResult != NO_ERROR) printf("Client: Error at WSAStartup().\n"); else printf("Client: WSAStartup() is OK.\n"); // Create a socket. SOCKET m_socket; m_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (m_socket == INVALID_SOCKET){ printf("Client: socket() - Error at socket(): %ld\n", WSAGetLastError()); WSACleanup(); return 7; }else printf("Client: socket() is OK.\n"); // Connect to a server. sockaddr_in clientService; clientService.sin_family = AF_INET; //clientService.sin_addr.s_addr = inet_addr("77.64.240.156"); clientService.sin_addr.s_addr = inet_addr("192.168.1.5"); //clientService.sin_addr.s_addr = inet_addr("87.207.222.5"); clientService.sin_port = htons(12345); if (connect(m_socket, (SOCKADDR*)&clientService, sizeof(clientService)) == SOCKET_ERROR){ printf("Client: connect() - Failed to connect.\n"); wprintf(L"connect function failed with error: %ld\n", WSAGetLastError()); iResult = closesocket(m_socket); if (iResult == SOCKET_ERROR) wprintf(L"closesocket function failed with error: %ld\n", WSAGetLastError()); WSACleanup(); return 6; } // Send and receive data int bytesSent; int bytesRecv = SOCKET_ERROR; // Be careful with the array bound, provide some checking mechanism char sendbuf[200] = "Client: Sending some test string to server..."; char recvbuf[200] = ""; bytesSent = send(m_socket, sendbuf, strlen(sendbuf), 0); printf("Client: send() - Bytes Sent: %ld\n", bytesSent); while(bytesRecv == SOCKET_ERROR){ bytesRecv = recv(m_socket, recvbuf, 32, 0); if (bytesRecv == 0 || bytesRecv == WSAECONNRESET){ printf("Client: Connection Closed.\n"); break; }else printf("Client: recv() is OK.\n"); if (bytesRecv < 0) return 0; else printf("Client: Bytes received - %ld.\n", bytesRecv); } system("pause"); return 0; } server: int main(){ WORD wVersionRequested; WSADATA wsaData={0}; int wsaerr; // Using MAKEWORD macro, Winsock version request 2.2 wVersionRequested = MAKEWORD(2, 2); wsaerr = WSAStartup(wVersionRequested, &wsaData); if (wsaerr != 0){ /* Tell the user that we could not find a usable WinSock DLL.*/ printf("Server: The Winsock dll not found!\n"); return 0; }else{ printf("Server: The Winsock dll found!\n"); printf("Server: The status: %s.\n", wsaData.szSystemStatus); } /* Confirm that the WinSock DLL supports 2.2.*/ /* Note that if the DLL supports versions greater */ /* than 2.2 in addition to 2.2, it will still return */ /* 2.2 in wVersion since that is the version we */ /* requested. */ if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2 ){ /* Tell the user that we could not find a usable WinSock DLL.*/ printf("Server: The dll do not support the Winsock version %u.%u!\n", LOBYTE(wsaData.wVersion), HIBYTE(wsaData.wVersion)); WSACleanup(); return 0; }else{ printf("Server: The dll supports the Winsock version %u.%u!\n", LOBYTE(wsaData.wVersion), HIBYTE(wsaData.wVersion)); printf("Server: The highest version this dll can support: %u.%u\n", LOBYTE(wsaData.wHighVersion), HIBYTE(wsaData.wHighVersion)); } //////////Create a socket//////////////////////// //Create a SOCKET object called m_socket. SOCKET m_socket; // Call the socket function and return its value to the m_socket variable. // For this application, use the Internet address family, streaming sockets, and the TCP/IP protocol. // using AF_INET family, TCP socket type and protocol of the AF_INET - IPv4 m_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); // Check for errors to ensure that the socket is a valid socket. if (m_socket == INVALID_SOCKET){ printf("Server: Error at socket(): %ld\n", WSAGetLastError()); WSACleanup(); //return 0; }else{ printf("Server: socket() is OK!\n"); } ////////////////bind////////////////////////////// // Create a sockaddr_in object and set its values. sockaddr_in service; // AF_INET is the Internet address family. service.sin_family = AF_INET; // "127.0.0.1" is the local IP address to which the socket will be bound. service.sin_addr.s_addr = htons(INADDR_ANY);//inet_addr("127.0.0.1");//htons(INADDR_ANY); //inet_addr("192.168.1.2"); // 55555 is the port number to which the socket will be bound. // using the htons for big-endian service.sin_port = htons(12345); // Call the bind function, passing the created socket and the sockaddr_in structure as parameters. // Check for general errors. if (bind(m_socket, (SOCKADDR*)&service, sizeof(service)) == SOCKET_ERROR){ printf("Server: bind() failed: %ld.\n", WSAGetLastError()); closesocket(m_socket); //return 0; }else{ printf("Server: bind() is OK!\n"); } // Call the listen function, passing the created socket and the maximum number of allowed // connections to accept as parameters. Check for general errors. if (listen(m_socket, 1) == SOCKET_ERROR) printf("Server: listen(): Error listening on socket %ld.\n", WSAGetLastError()); else{ printf("Server: listen() is OK, I'm waiting for connections...\n"); } // Create a temporary SOCKET object called AcceptSocket for accepting connections. SOCKET AcceptSocket; // Create a continuous loop that checks for connections requests. If a connection // request occurs, call the accept function to handle the request. printf("Server: Waiting for a client to connect...\n"); printf("***Hint: Server is ready...run your client program...***\n"); // Do some verification... while (1){ AcceptSocket = SOCKET_ERROR; while (AcceptSocket == SOCKET_ERROR){ AcceptSocket = accept(m_socket, NULL, NULL); } // else, accept the connection... note: now it is wrong implementation !!!!!!!! !! !! (only 1 char) // When the client connection has been accepted, transfer control from the // temporary socket to the original socket and stop checking for new connections. printf("Server: Client Connected! Mammamija. \n"); m_socket = AcceptSocket; char recvBuf[200]=""; char * rc=recvBuf; int bytesRecv=recv(m_socket,recvBuf,64,0); if(bytesRecv==0 || bytesRecv==WSAECONNRESET){ cout<<"server: connection closed.\n"; }else{ cout<<"server: recv() is OK.\n"; if(bytesRecv<0){ return 0; }else{ printf("server: bytes received: %ld.\n",recvBuf); } }

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• Replicate / SYNC / Copy thousands of files

  - by rihatum

  Windows 32BIT Box (Server OS) 4GB RAM a 800GB LUN Mapped to the above box as a local drive Around 700GB of text files (Yes text files and a few thousand word documents) nested in thousands of directories. I need to move this to a new storage and map another server to it. What would be the best way to go about it ? What I did was mapped the existing LUN to our new box and mapped a LUN from the New storage to the new box too, and tried copying (windows copy) but that wasn't good / fast enough considering the downtime. I am now looking for either a script which will do this or a utility (prefer opensource / free) to move this size of data at a good speed. 2 x 1GB Nics teamed ether channel 2GBPs Any suggestions or pointers would be off great help Thanks !

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• Any Recommendations for a Web Based Large File Transfer System?

  - by Glen Richards

  I'm looking for a server software product that: Allows my users to share large files with: The general public securely to 1 or more people (notification via email, optionally with a token that gives them x period of time to download) Allows anyone in the general public to share files with my users. Perhaps by invitation. Has to be user friendly enough to allow my users to use this with out having to bug me as the admin. It needs to be a system that we can install on our own server (we don't want shared data sitting on anyone else's server) A web based solution. Using some kind or secure comms channel would be good too, eg, ssh Files to share could be over 1 GB. I found the question below. WebDav does not sound user friendly enough: http://serverfault.com/questions/86878/recommendations-for-a-secure-and-simple-dropbox-system I've done a lot of searching, but I can't get the search terms right. There are too many services that provide this, but I want something we can install on our own server. A last resort would be to roll my own. Any ideas appreciated. Glen EDIT Sorry Tom and Jeff but Glen specifically says that he's looking for a 'product' so given that I specialise in this field thought that my expertise in this area may have been of use to him. I don't see how him writing services is going to be easy for him to maintain going forward (large IT admin overhead) or simple for his users and the general public to work with.

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• Sharing large (multi-Gb) files with clients

  - by Tim Long

  I wasn't sure if this was the best place for this question, but I think it is squarely in the realm of the IT admin so that's the reason I put it here. We need to share large files (several Gigabytes) with external clients. We need a simple way of reliably and automatically publishing these files so that clients can then download them. Our organization has Windows desktops and a Windows SBS 2011 server. Sharing from our server is probably suboptimal from the client's perspective, because of the low upstream bandwidth of typical ADSL (around 1 Mbps) - it would take all day (9 hours for a 4Gb file) for the client to download the file. Uploading to a 3rd party sever is good for the client but painful for us, because we then have to deal with a multi-hour upload. Uploading to a third-part server would be less problematic if it could be made reliable and automatic, e.g. something like a Groove/SharePoint Workspace, simply drop the file in and wait for it to synchronize - but Groove has a 2Gb limit which is not big enough. So ideally I'd like a service with the following attributes: Must work for files of at least 5Gb, preferably 10Gb Once the transfer is started, it must be reliable (i.e. not sensitive to disconnections and service outages) and completely automatic Ideally, the sender would get a notification when the transfer completes. Has to work with Windows based systems. Any suggestions?

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• DBan not working because disk has bad sectors? [migrated]

  - by canadiancreed

  Attempting to wipe the drive of a laptop that I have before it's sold, and normally use DBAN to do so. However this time it starts and then finishes instantly with the following message. "DBAN finished with non-fatal errors This is usually cause by disks with bad sectors" Have tried multiple flags such as noverify to force it to skip this check (it doesn't show bad sectors in the OS scan in windows). but the error always comes back. This is the only time that I've seen this message, as every other of the few drives I've used this software on usually take 3-5 hours to do their job.

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• How to completely disable Mysqli

  - by Boon

  It seems the new hacker tool refref has been launched, and apparently it abuses a bug in the mysqli extension. Now I do not use mysqli at all for my websites, so i thought the best way to fight off this refref tool was to completely disable mysqli. These are the settings i have set in my php.ini. Is there a way I can disable mysqli completely with having to recompile PHP? ;extension=php_mysqli.dll [MySQLi] mysqli.max_persistent = -1 ;mysqli.allow_local_infile = On mysqli.allow_persistent = On mysqli.max_links = -1 mysqli.cache_size = 2000 mysqli.default_port = 3306 mysqli.default_socket = mysqli.default_host = mysqli.default_user = mysqli.default_pw = mysqli.reconnect = Off

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• custom MAIL server -> Proxy Server -> Gmail Server

  - by Eugene

  So I have some custom VPS which route emails via MX record in DNS. And I need to setup gmail interface via Google Apps - this step and previous are clear. But how can I insert some middle layer, to check emails messages for special words/etc., so something like spam assasin proxy, but custom product. The question is: How could i setup proxy mail from my server = to proxy server(or application) = to gmail servers? Thank you, for any help!

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• Nginx Reverse proxy + SYN Flood

  - by Bradley

  We're running a nginx reverse proxy cluster, forwarding traffic to our main website, this enables us to filter out unwanted traffic/users etc, and send them off else where, now we have a few issues with SYN floods where the requests a second is overflowing the proxy + the main server causing them to become unavailable. Is there any ip tables magic that can A) Rate limit SYN packets / connections to HTTP B) Block it all together if packets a second is malicious or any advice how to use limit_rate_zone in nginx, I've googled and tried to apply a few new results and none of them work and the websites are still unavailable.

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• Server performance worsened after a hardware upgrade: how should I reconfigure the server?

  - by twick

  I'm running a site on an Ubuntu/Apache/Django/PostgreSQL stack. We upgraded our server recently from 1 processor with 2 Gb total RAM (with 0.5 Gb of that RAM assigned to memcached) to a new server that has 2 processors with 4 Gb total RAM (with 2 Gb of that RAM assigned to memcached). However, when I looked at Google Webmaster Tools, I found out that the average page speed has worsened from 5 seconds to 15 seconds. Why would performance get worse with a hardware upgrade? What should I check and tune? Is this more likely to be a problem with memcached, Apache, Django, or PostgreSQL?

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• Configure a wireless network that accepts any WPA2-PSK network key

  - by Michel

  I recently bought a UART WiFi module ( this one ) and configured it with right SSID but wrong password( and I don't know what it is ). The problem is that I can't reset this module to its manufacture settings and I can't connect to this module via serial port to configure it with some wire or cable. But I'm sure that my module is trying to connect my access point but with wrong network key ( because in logs of my access point I can see my module that trying to connect but it can't ) So, I wonder to know is there any way to create or configure a network (using some access point or something else) based on WPA2 Personal security that accepts any WPA2-PSK passwords ? Or is there any other solution for this problem ? If no, is there anyway to see what password this module using to connect to that network ? ( If yes, then I can change password of my network to that password and access to this module's admin panel ) I tried create an open network ( without any security key ) but my module just searches for WPA2 based networks ( I think ).

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• How can I quickly zoom in on the Mac OS X version of Word without having to use the menu?

  - by Lloyd

  (I'm using the Mac version MS Word 2011) I used to happily use the wheel mouse to zoom but, after upgrading to the Mac Magic mouse (using only finger slide movement to scroll and pan) I can no longer hold Ctrl and roll the mouse to zoom (driving me crazy) and I can't see a useful keyboard shortcut and the zoom slider bar in the lower right of the Word screen isn't practical (in my experience). Is there any way to zoom in on the Mac Version of Microsoft Word 2011 without resorting to using a menu?

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• How do I keep folders synced and backed up between two macs using a Linux NAS (rsync?)

  - by Hultner

  I've got two primary computers, one Mac Pro and one MacBook Pro for when I'm on the go. I've also got a Linux sever which also acts as NAS. Currently I backup the entire computers to an external drive with Time Machine which is rather useless and doesn't sync anything. What I really want to do is to keep my important files synced between both computers and my NAS (which is running RAID 5), that way I'm not backing up easily replaceable systemfiles and I've got all my important files in 3 places where two of them are running raid so at least 5 drives would have to crash at the same time before actual data loss occur. Folders I want to keep synced is basically my photo, documents, development, mamp and work folders and then I want to keep the user library folder backed up but not synced. I'm thinking that I'd have to use rsync but don't know how. Before suggesting Dropbox and similar suggestions I don't want to use them because of several reasons some of them being security (Dropbox obviously proved this), Speed (sometimes I'll sync gigabytes of data and that will be significantly faster locally and probably even through VPN as I have a Gigabit pipe), Space (space on my NAS is cheap and only practically limited by my needs), reliability (even if my internet were to go down I still need to be able to keep my files synced incase I'd need to go somewhere on the fly), price (I already have all the hardware and for the amount of gigabytes and bandwidth I'd need I doubt that there's any free or cheap service). Those are my main reason for wanting to keep it locally. I'm sorry for any spelling or grammatical mistakes that I've might have done. I'm writing this on my smartphone from a shaky train and English isn't my mother tongue. I gratefully appreciate any answers even if only partly solving my problem.

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