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  • Using one key for Encryption and HMAC

    - by Vladimir
    Hello, I am wondering whether I can use a shared secret key established between two clients as the HMAC key too. I saw that there is a problem when it is used as a CBC-MAC but I haven't found any evidence it is bad practice for HMACs. Thanks, Vladimir

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  • Linq-to-sql Compiled Query is caching result from disposed DataContext

    - by Vladimir Kojic
    Compiled query: public static Func<OperationalDataContext, short, Machine> QueryMachineById = CompiledQuery.Compile((OperationalDataContext db, short machineID) => db.Machines.Where(m => m.MachineID == machineID).SingleOrDefault()); It looks like compiled query is caching Machine object and returning the same object even if query is called from new DataContext (I’m disposing DataContext in the service but I’m getting Machine from previous DataContext). I use POCOs and XML mapping. Getting cached object from the same datacontext is ok, but when I call query with new DataContext I don’t want to get object from old datacontext. Is there something that I don’t do right ? Thanks, Vladimir

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  • OpenVPN on Ubuntu 11.10 - unable to redirect default gateway

    - by Vladimir Kadalashvili
    I'm trying to connect to connect to OpenVPN server from my Ubuntu 11.10 machine. I use the following command to do it (under root user): openvpn --config /home/vladimir/client.ovpn Everything seems to be OK, it connects normally without any warnings and errors, but when I try to browse the internet I see that I still use my own IP address, so VPN connection doesn't work. When I run openvpn command, it displays the following message among others: NOTE: unable to redirect default gateway -- Cannot read current default gateway from system I think it's the cause of this problem, but unfortunately I don't know how to fix it. Below is full output of openvpn command: Sat Jun 9 23:51:36 2012 OpenVPN 2.2.0 x86_64-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] [eurephia] [MH] [PF_INET6] [IPv6 payload 20110424-2 (2.2RC2)] built on Jul 4 2011 Sat Jun 9 23:51:36 2012 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables Sat Jun 9 23:51:36 2012 Control Channel Authentication: tls-auth using INLINE static key file Sat Jun 9 23:51:36 2012 Outgoing Control Channel Authentication: Using 160 bit message hash 'SHA1' for HMAC authentication Sat Jun 9 23:51:36 2012 Incoming Control Channel Authentication: Using 160 bit message hash 'SHA1' for HMAC authentication Sat Jun 9 23:51:36 2012 LZO compression initialized Sat Jun 9 23:51:36 2012 Control Channel MTU parms [ L:1542 D:166 EF:66 EB:0 ET:0 EL:0 ] Sat Jun 9 23:51:36 2012 Socket Buffers: R=[126976->200000] S=[126976->200000] Sat Jun 9 23:51:36 2012 Data Channel MTU parms [ L:1542 D:1450 EF:42 EB:135 ET:0 EL:0 AF:3/1 ] Sat Jun 9 23:51:36 2012 Local Options hash (VER=V4): '504e774e' Sat Jun 9 23:51:36 2012 Expected Remote Options hash (VER=V4): '14168603' Sat Jun 9 23:51:36 2012 UDPv4 link local: [undef] Sat Jun 9 23:51:36 2012 UDPv4 link remote: [AF_INET]94.229.78.130:1194 Sat Jun 9 23:51:37 2012 TLS: Initial packet from [AF_INET]94.229.78.130:1194, sid=13fd921b b42072ab Sat Jun 9 23:51:37 2012 VERIFY OK: depth=1, /CN=OpenVPN_CA Sat Jun 9 23:51:37 2012 VERIFY OK: nsCertType=SERVER Sat Jun 9 23:51:37 2012 VERIFY OK: depth=0, /CN=OpenVPN_Server Sat Jun 9 23:51:38 2012 Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key Sat Jun 9 23:51:38 2012 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication Sat Jun 9 23:51:38 2012 Data Channel Decrypt: Cipher 'BF-CBC' initialized with 128 bit key Sat Jun 9 23:51:38 2012 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication Sat Jun 9 23:51:38 2012 Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 1024 bit RSA Sat Jun 9 23:51:38 2012 [OpenVPN_Server] Peer Connection Initiated with [AF_INET]94.229.78.130:1194 Sat Jun 9 23:51:40 2012 SENT CONTROL [OpenVPN_Server]: 'PUSH_REQUEST' (status=1) Sat Jun 9 23:51:40 2012 PUSH: Received control message: 'PUSH_REPLY,explicit-exit-notify,topology subnet,route-delay 5 30,dhcp-pre-release,dhcp-renew,dhcp-release,route-metric 101,ping 5,ping-restart 40,redirect-gateway def1,redirect-gateway bypass-dhcp,redirect-gateway autolocal,route-gateway 5.5.0.1,dhcp-option DNS 8.8.8.8,dhcp-option DNS 8.8.4.4,register-dns,comp-lzo yes,ifconfig 5.5.117.43 255.255.0.0' Sat Jun 9 23:51:40 2012 Unrecognized option or missing parameter(s) in [PUSH-OPTIONS]:4: dhcp-pre-release (2.2.0) Sat Jun 9 23:51:40 2012 Unrecognized option or missing parameter(s) in [PUSH-OPTIONS]:5: dhcp-renew (2.2.0) Sat Jun 9 23:51:40 2012 Unrecognized option or missing parameter(s) in [PUSH-OPTIONS]:6: dhcp-release (2.2.0) Sat Jun 9 23:51:40 2012 Unrecognized option or missing parameter(s) in [PUSH-OPTIONS]:16: register-dns (2.2.0) Sat Jun 9 23:51:40 2012 OPTIONS IMPORT: timers and/or timeouts modified Sat Jun 9 23:51:40 2012 OPTIONS IMPORT: explicit notify parm(s) modified Sat Jun 9 23:51:40 2012 OPTIONS IMPORT: LZO parms modified Sat Jun 9 23:51:40 2012 OPTIONS IMPORT: --ifconfig/up options modified Sat Jun 9 23:51:40 2012 OPTIONS IMPORT: route options modified Sat Jun 9 23:51:40 2012 OPTIONS IMPORT: route-related options modified Sat Jun 9 23:51:40 2012 OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified Sat Jun 9 23:51:40 2012 ROUTE: default_gateway=UNDEF Sat Jun 9 23:51:40 2012 TUN/TAP device tun0 opened Sat Jun 9 23:51:40 2012 TUN/TAP TX queue length set to 100 Sat Jun 9 23:51:40 2012 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0 Sat Jun 9 23:51:40 2012 /sbin/ifconfig tun0 5.5.117.43 netmask 255.255.0.0 mtu 1500 broadcast 5.5.255.255 Sat Jun 9 23:51:45 2012 NOTE: unable to redirect default gateway -- Cannot read current default gateway from system Sat Jun 9 23:51:45 2012 Initialization Sequence Completed Output of route command: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface default * 0.0.0.0 U 0 0 0 ppp0 5.5.0.0 * 255.255.0.0 U 0 0 0 tun0 link-local * 255.255.0.0 U 1000 0 0 wlan0 192.168.0.0 * 255.255.255.0 U 0 0 0 wlan0 stream-ts1.net. * 255.255.255.255 UH 0 0 0 ppp0 Output of ifconfig command: eth0 Link encap:Ethernet HWaddr 6c:62:6d:44:0d:12 inet6 addr: fe80::6e62:6dff:fe44:d12/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:54594 errors:0 dropped:0 overruns:0 frame:0 TX packets:59897 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:44922107 (44.9 MB) TX bytes:8839969 (8.8 MB) Interrupt:41 Base address:0x8000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:4561 errors:0 dropped:0 overruns:0 frame:0 TX packets:4561 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:685425 (685.4 KB) TX bytes:685425 (685.4 KB) ppp0 Link encap:Point-to-Point Protocol inet addr:213.206.63.44 P-t-P:213.206.34.4 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1 RX packets:53577 errors:0 dropped:0 overruns:0 frame:0 TX packets:58892 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:43667387 (43.6 MB) TX bytes:7504776 (7.5 MB) tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:5.5.117.43 P-t-P:5.5.117.43 Mask:255.255.0.0 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) wlan0 Link encap:Ethernet HWaddr 00:27:19:f6:b5:cf inet addr:192.168.0.1 Bcast:0.0.0.0 Mask:255.255.255.0 inet6 addr: fe80::227:19ff:fef6:b5cf/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:12079 errors:0 dropped:0 overruns:0 frame:0 TX packets:11178 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1483691 (1.4 MB) TX bytes:4307899 (4.3 MB) So my question is - how to make OpenVPN redirect default gateway? Thanks!

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  • PPTP connection disconnect

    - by Vladimir Franciz S. Blando
    My pptp connection wont stay connected, it will disconnect in less than a minute here are some relevant log entries May 31 13:32:31 localhost NetworkManager[931]: <info> Starting VPN service 'pptp'... May 31 13:32:31 localhost NetworkManager[931]: <info> VPN service 'pptp' started (org.freedesktop.NetworkManager.pptp), PID 15216 May 31 13:32:31 localhost NetworkManager[931]: <info> VPN service 'pptp' appeared; activating connections May 31 13:32:31 localhost NetworkManager[931]: <info> VPN plugin state changed: init (1) May 31 13:32:31 localhost NetworkManager[931]: <info> VPN plugin state changed: starting (3) May 31 13:32:31 localhost NetworkManager[931]: <info> VPN connection 'Dynalabs' (Connect) reply received. May 31 13:32:31 localhost pppd[15221]: Plugin /usr/lib/pppd/2.4.5/nm-pptp-pppd-plugin.so loaded. May 31 13:32:31 localhost pppd[15221]: pppd 2.4.5 started by root, uid 0 May 31 13:32:31 localhost pptp[15224]: nm-pptp-service-15216 log[main:pptp.c:314]: The synchronous pptp option is NOT activated May 31 13:32:31 localhost pppd[15221]: Using interface ppp0 May 31 13:32:31 localhost pppd[15221]: Connect: ppp0 <--> /dev/pts/5 May 31 13:32:31 localhost NetworkManager[931]: SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0) May 31 13:32:31 localhost NetworkManager[931]: SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found. May 31 13:32:32 localhost pptp[15235]: nm-pptp-service-15216 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 1 'Start-Control-Connection-Request' May 31 13:32:32 localhost pptp[15235]: nm-pptp-service-15216 log[ctrlp_disp:pptp_ctrl.c:739]: Received Start Control Connection Reply May 31 13:32:32 localhost pptp[15235]: nm-pptp-service-15216 log[ctrlp_disp:pptp_ctrl.c:773]: Client connection established. May 31 13:32:33 localhost pptp[15235]: nm-pptp-service-15216 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 7 'Outgoing-Call-Request' May 31 13:32:34 localhost pptp[15235]: nm-pptp-service-15216 log[ctrlp_disp:pptp_ctrl.c:858]: Received Outgoing Call Reply. May 31 13:32:34 localhost pptp[15235]: nm-pptp-service-15216 log[ctrlp_disp:pptp_ctrl.c:897]: Outgoing call established (call ID 0, peer's call ID 1536). May 31 13:32:37 localhost pppd[15221]: CHAP authentication succeeded May 31 13:32:37 localhost kernel: [54007.078553] PPP MPPE Compression module registered May 31 13:32:40 localhost pppd[15221]: MPPE 128-bit stateless compression enabled May 31 13:32:42 localhost pppd[15221]: local IP address 10.100.0.52 May 31 13:32:42 localhost pppd[15221]: remote IP address 10.100.0.1 May 31 13:32:42 localhost pppd[15221]: primary DNS address 4.2.2.1 May 31 13:32:42 localhost pppd[15221]: secondary DNS address 255.255.255.255 May 31 13:32:42 localhost NetworkManager[931]: <info> VPN connection 'Dynalabs' (IP Config Get) reply received. May 31 13:32:42 localhost NetworkManager[931]: <info> VPN Gateway: 103.28.219.2 May 31 13:32:42 localhost NetworkManager[931]: <info> Tunnel Device: ppp0 May 31 13:32:42 localhost NetworkManager[931]: <info> Internal IP4 Address: 10.100.0.52 May 31 13:32:42 localhost NetworkManager[931]: <info> Internal IP4 Prefix: 32 May 31 13:32:42 localhost NetworkManager[931]: <info> Internal IP4 Point-to-Point Address: 10.100.0.1 May 31 13:32:42 localhost NetworkManager[931]: <info> Maximum Segment Size (MSS): 0 May 31 13:32:42 localhost NetworkManager[931]: <info> Forbid Default Route: no May 31 13:32:42 localhost NetworkManager[931]: <info> Internal IP4 DNS: 4.2.2.1 May 31 13:32:42 localhost NetworkManager[931]: <info> Internal IP4 DNS: 255.255.255.255 May 31 13:32:42 localhost NetworkManager[931]: <info> DNS Domain: '(none)' May 31 13:32:43 localhost dnsmasq[2127]: exiting on receipt of SIGTERM May 31 13:32:43 localhost NetworkManager[931]: <info> DNS: starting dnsmasq... May 31 13:32:43 localhost NetworkManager[931]: <info> (ppp0): writing resolv.conf to /sbin/resolvconf May 31 13:32:43 localhost dnsmasq[15290]: error at line 2 of /var/run/nm-dns-dnsmasq.conf May 31 13:32:43 localhost dnsmasq[15290]: FAILED to start up May 31 13:32:43 localhost NetworkManager[931]: <info> VPN connection 'Dynalabs' (IP Config Get) complete. May 31 13:32:43 localhost NetworkManager[931]: <info> Policy set 'Dynalabs' (ppp0) as default for IPv4 routing and DNS. May 31 13:32:43 localhost NetworkManager[931]: <info> VPN plugin state changed: started (4) May 31 13:32:43 localhost NetworkManager[931]: <warn> dnsmasq exited with error: Configuration problem (1) May 31 13:32:43 localhost NetworkManager[931]: <info> (ppp0): writing resolv.conf to /sbin/resolvconf May 31 13:32:43 localhost dbus[872]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper) May 31 13:32:43 localhost dbus[872]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher' May 31 13:33:00 localhost ntpdate[15370]: step time server 91.189.94.4 offset -1.110301 sec May 31 13:33:21 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xd6d6 May 31 13:33:21 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x93aa May 31 13:33:21 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xcc83 May 31 13:33:21 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x2031 May 31 13:33:21 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x13d4 May 31 13:33:22 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x5b11 May 31 13:33:22 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x414b May 31 13:33:22 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x2f5f May 31 13:33:22 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xe9ff May 31 13:33:23 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x8e20 May 31 13:33:23 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x8f0 May 31 13:33:23 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xf166 May 31 13:33:23 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x36e6 May 31 13:33:23 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xdd19 May 31 13:33:23 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xda26 May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xac5 May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x53a5 May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x507e May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x1dc5 May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xf87b May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x2f27 May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xd10c May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x66ef May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xa294 May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xb15 May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x52a2 May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xd863 May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x8a96 May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xde19 May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x9763 May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xb23 May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x83ca May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x964e May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xe8ae May 31 13:33:24 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xf614 May 31 13:33:25 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x9b1 May 31 13:33:25 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xf086 May 31 13:33:25 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xbff4 May 31 13:33:25 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x66c5 May 31 13:33:25 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xe42 May 31 13:33:25 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xf295 May 31 13:33:25 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x86fe May 31 13:33:26 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x3bc1 May 31 13:33:26 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xbaad May 31 13:33:26 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x88b5 May 31 13:33:26 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xd7a May 31 13:33:26 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x30d5 May 31 13:33:26 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x2d8f May 31 13:33:26 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x3933 May 31 13:33:26 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x8d42 May 31 13:33:26 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x4b4 May 31 13:33:26 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xa205 May 31 13:33:26 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x7cc5 May 31 13:33:26 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x1b6a May 31 13:33:26 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0xf004 May 31 13:33:26 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x21b6 May 31 13:33:26 localhost pppd[15221]: Protocol-Reject for unsupported protocol 0x51eb

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  • Java Spotlight Episode 35: JVM Performance and Quality

    - by Roger Brinkley
    Tweet Interview with Vladimir Ivanov, Ivan Krylov, Sergey Kuksenko on the JDK 7 Java Virtual Machine performance and quality. Joining us this week on the Java All Star Developer Panel are Dalibor Topic, Java Free and Open Source Software Ambassador, and Alexis Moussine-Pouchkine, Java EE Developer Advocate. Right-click or Control-click to download this MP3 file. You can also subscribe to the Java Spotlight Podcast Feed to get the latest podcast automatically. If you use iTunes you can open iTunes and subscribe with this link: Java Spotlight Podcast in iTunes. Show Notes News Java 7 Launch Event GlassFish 3.1.1 re-planning done, first RC on July 7th, lots of component updates following customer and community feedback Mojarra 2.1.2 is here, just a little ahead of the GlassFish 3.1.1 release. In other JSF-related news, JSF 2.0 has a first expert draft New OpenJDK Project proposed: JDK 7 Update Events June 20-23 JAX, San Jose, CA June 21 Java + MySQL Webinar at 9:00 AM PDT June 21-23 JaZoon, Zurich, Switzerland June 22nd and 28th GlassFish Webinars (one in Portuguese) June 29-July 2 12th Forum Internatioal Software Livre, Porto Alegre, Brazil July 3, Sao Jose do Rio Preto, Brazil July 5, Brasilia, Brazil (DFJUG) July 6, Goiania, Brazil (GOJava) July 6-10 The Developers Conference, Sao Paulo, Brazil July 7 Java 7 Launch Event live in Redwood Shores, CA; Sao Paulo, BR; London, England. July 9, Joao Pessoa, Brazil (PBJUG) July 11, Natal, Brazil (JavaRN) July 14, Fortaleza, Brazil (CEJUG) July 16, Salvador, Brazil (JavaBahia) July 19, Toledo, Brazil (UNIPAR) July 21, Maringa, Brazil (RedFoot) Feature interview This weeks feature interview is with Vladimir Ivanov, HotSpot JVM Quality Engingeer;  Ivan Krylov, Licensee Engineering;  and Sergey Kuksenko, Java SE Performance Team on the JDK 7 Java Virtual Machine peformance and quality. What's Cool Ongoing OpenJDK Bylaws ratification results Show Transcripts Transcript for this show is available here when available

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  • Ubuntu backlight problem with Nvidia graphics

    - by Vladimir
    I have a laptop mySN QMG6 / Chiligreen Mobilitas NW which is Quanta TW9 barebone with intel i3 and nvidia 335m GT onboard. On ubuntu distros 10.04, 10.10, 11.04 and 11.10 i had problem with changing screen backlight with nouveau and nvidia drivers. FN+F4/F5 buttons did not change my brightness. I tried to edit xorg.conf, adding Option “RegistryDwords” “EnableBrightnessControl=1? Also tried to add some lines to grug acpi_osi="Linux" acpi_backlight=vendor Neither worked for me. Today I installed Ubuntu 12.04 beta2 and... With nouveau driver my FN key works, and changes the brightness (is it a new 3.0.22 linux kernel, or patched nouveau driver, i don't know). This is a big step forward. But, when installing proprietary nvidia driver (295.33) FN button stops working and i can't change brightness. I also tried workaround with xorg and grub with no result. Tried to install acpi from apt - no result. Is there anything left to try? I really need that nvidia driver working with FN keys, as i would like to have a working 3D acceleration. P.S. Does the nouveau driver has 3d acceleration like nvidia drivers??? If there is need to provide some log data, please write what should i print, as i'm a bit new to Ubuntu. P.P.S. Same problems i had with other Linux distros (Mint, Fedora and others) P.P.P.S. Other FN buttons work with both drivers (Mute, VOL UP/DOWN, WiFi on/off, Bluetooth, Sleep, Start/Pause, Stop, Next/Prev song)

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  • How can I store spell & items using a std::vector implementation?

    - by Vladimir Marenus
    I'm following along with a book from GameInstitute right now, and it's asking me to: Allow the player to buy and carry healing potions and potions of fireball. You can add an Item array (after you define the item class) to the Player class for storing them, or use a std::vector to store them. I think I would like to use the std::vector implementation, because that seems to confuse me less than making an item class, but I am unsure how to do so. I've heard from many people that vectors are great ways to store dynamic values (such as items, weapons, etc), but I've not seen it used.

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  • Upgrading in java web development

    - by Vladimir Ivanov
    I'm a java web developer for nearly 3 years. Always trying to learn more and be better but still I feel that the amount of knowledge is not that good as I want. The knowledge in some places still seems to be non-systematic and don't provide a very strong base to solve the problems as good as I want to do it. The example I have is my senior developer, whose solutions are always more efficient and beautiful. So, the question is rather simple and hard the same time. What is the right way to get my knowlege be more systematic and therefore improve it's quality. I understand that there is no practically good answer for the all java programming, so let's focus on the modern java web or nearly web technologies: JSF 2.0 JPA2 and Hibernate as persistence provider Web services and Java SE as a core. What methodologies or books or learning technics lead to the strong knowledge base within the given knowledge area?

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  • Can't adjust backlight on an Nvidia 335m GT

    - by Vladimir
    I have a laptop mySN QMG6 / Chiligreen Mobilitas NW which is Quanta TW9 barebone with intel i3 and nvidia 335m GT onboard. On ubuntu distros 10.04, 10.10, 11.04 and 11.10 i had problem with changing screen backlight with nouveau and nvidia drivers. FN+F4/F5 buttons did not change my brightness. I tried to edit xorg.conf, adding Option “RegistryDwords” “EnableBrightnessControl=1? Also tried to add some lines to grub acpi_osi="Linux" acpi_backlight=vendor Neither worked for me. Today I installed Ubuntu 12.04 beta2 and... With nouveau driver my FN key works, and changes the brightness (is it a new 3.0.22 linux kernel, or patched nouveau driver, i don't know). This is a big step forward. But, when installing proprietary nvidia driver (295.33) FN button stops working and i can't change brightness. I also tried workaround with xorg and grub with no result. Tried to install acpi from apt - no result. Is there anything left to try? I really need that nvidia driver working with FN keys, as i would like to have a working 3D acceleration. P.S. Does the nouveau driver has 3d acceleration like nvidia drivers??? If there is need to provide some log data, please write what should i print, as i'm a bit new to Ubuntu. P.P.S. Same problems i had with other Linux distros (Mint, Fedora and others) P.P.P.S. Other FN buttons work with both drivers (Mute, VOL UP/DOWN, WiFi on/off, Bluetooth, Sleep, Start/Pause, Stop, Next/Prev song) Some new thoughts... CONFIG_BACKLIGHT_GENERIC=m could this be an issue? Made this by grep BACKLIGHT /boot/config-3.2.0-22-generic-pae Full grep output can be viewed here: http://pastebin.com/sMRd2Z4k

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  • Recursion VS memory allocation

    - by Vladimir Kishlaly
    Which approach is most popular in real-world examples: recursion or iteration? For example, simple tree preorder traversal with recursion: void preorderTraversal( Node root ){ if( root == null ) return; root.printValue(); preorderTraversal( root.getLeft() ); preorderTraversal( root.getRight() ); } and with iteration (using stack): Push the root node on the stack While the stack is not empty Pop a node Print its value If right child exists, push the node's right child If left child exists, push the node's left child In the first example we have recursive method calls, but in the second - new ancillary data structure. Complexity is similar in both cases - O(n). So, the main question is memory footprint requirement?

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  • Asus Eee PC 1000HE wireless woes

    - by Vladimir Noobokov
    Ever since I have upgraded my Asus Eee PC 1000HE from Lucid 10.04 to Precise 12.04 I have been having issues with my wireless connections. At first I had wireless dropouts: I would be able to start using wireless, but then after a few minutes the wireless would stop working even though I was still connected to the network. Lately things turned worse: while I connect to my wireless network, it just never works. I tried all sorts of solutions on offer here and in other forums but none worked. At best I got the wireless to work up until I rebooted, at which point I would get the same symptoms again: the wireless network is there, but it's not really working. By now I tried so many different "solutions" I don't know where to start describing them; I have also reinstalled 12.04 several times, enough to make me lose faith in Ubuntu. Help here looks like my last resort. For the record, my Asus Eee PC 1000HE is equipped with an Atheros wireless card. I have reinstalled 12.04, ran all the suggested updates, and receive the following response when I type iwconfig in the terminal: lo no wireless extensions. wlan0 IEEE 802.11bgn ESSID:"Arsenal" Mode:Managed Frequency:2.452 GHz Access Point: 00:04:ED:48:67:89 Bit Rate=1 Mb/s Tx-Power=16 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off Link Quality=70/70 Signal level=-29 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:27 Invalid misc:57 Missed beacon:0 eth0 no wireless extensions. Thanks in advance for any help that might be offered.

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  • How Do I Search For Struct Items In A Vector? [migrated]

    - by Vladimir Marenus
    I'm attempting to create an inventory system using a vector implementation, but I seem to be having some troubles. I'm running into issues using a struct I made. NOTE: This isn't actually in a game code, this is a separate Solution I am using to test my knowledge of vectors and structs! struct aItem { string itemName; int damage; }; int main() { aItem healingPotion; healingPotion.itemName = "Healing Potion"; healingPotion.damage= 6; aItem fireballPotion; fireballPotion.itemName = "Potion of Fiery Balls"; fireballPotion.damage = -2; vector<aItem> inventory; inventory.push_back(healingPotion); inventory.push_back(healingPotion); inventory.push_back(healingPotion); inventory.push_back(fireballPotion); if(find(inventory.begin(), inventory.end(), fireballPotion) != inventory.end()) { cout << "Found"; } system("PAUSE"); return 0; } The preceeding code gives me the following error: 1c:\program files (x86)\microsoft visual studio 11.0\vc\include\xutility(3186): error C2678: binary '==' : no operator found which takes a left-hand operand of type 'aItem' (or there is no acceptable conversion) There is more to the error, if you need it please let me know. I bet it's something small and silly, but I've been thumping at it for over two hours. Thanks in advance!

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  • UniversalConnectionPoolManagerMBean already registered.

    - by Vladimir Bezugliy
    I have two web applications. Both of yhem use oracle.ucp.UniversalConnectionPool. When I deploy these applications on JBoss I get following exception: java.sql.SQLException: Unable to start the Universal Connection Pool: java.sql.SQLException: Unable to start the Universal Connection Pool: oracle.ucp.UniversalConnectionPoolException: MBean exception occurred while registering or unregistering the MBean at oracle.ucp.util.UCPErrorHandler.newSQLException(UCPErrorHandler.java:541) at oracle.ucp.jdbc.PoolDataSourceImpl.throwSQLException(PoolDataSourceImpl.java:588) at oracle.ucp.jdbc.PoolDataSourceImpl.startPool(PoolDataSourceImpl.java:277) at oracle.ucp.jdbc.PoolDataSourceImpl.getConnection(PoolDataSourceImpl.java:647) at oracle.ucp.jdbc.PoolDataSourceImpl.getConnection(PoolDataSourceImpl.java:614) at oracle.ucp.jdbc.PoolDataSourceImpl.getConnection(PoolDataSourceImpl.java:608) at org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy.afterPropertiesSet(LazyConnectionDataSourceProxy.java:163) ... Caused by: java.sql.SQLException: Unable to start the Universal Connection Pool: oracle.ucp.UniversalConnectionPoolException: MBean exception occurred while registering or unregistering the MBean at oracle.ucp.util.UCPErrorHandler.newSQLException(UCPErrorHandler.java:541) at oracle.ucp.jdbc.PoolDataSourceImpl.throwSQLException(PoolDataSourceImpl.java:588) at oracle.ucp.jdbc.PoolDataSourceImpl.startPool(PoolDataSourceImpl.java:248) ... 212 more Caused by: oracle.ucp.UniversalConnectionPoolException: MBean exception occurred while registering or unregistering the MBean at oracle.ucp.util.UCPErrorHandler.newUniversalConnectionPoolException(UCPErrorHandler.java:421) at oracle.ucp.util.UCPErrorHandler.newUniversalConnectionPoolException(UCPErrorHandler.java:389) at oracle.ucp.admin.UniversalConnectionPoolManagerMBeanImpl.getUniversalConnectionPoolManagerMBean(UniversalConnectionPoolManagerMBeanImpl.java:148) at oracle.ucp.jdbc.PoolDataSourceImpl.startPool(PoolDataSourceImpl.java:243) ... 212 more Caused by: java.security.PrivilegedActionException: javax.management.InstanceAlreadyExistsException: oracle.ucp.admin:name=UniversalConnectionPoolManagerMBean already registered. at java.security.AccessController.doPrivileged(Native Method) at oracle.ucp.admin.UniversalConnectionPoolManagerMBeanImpl.getUniversalConnectionPoolManagerMBean(UniversalConnectionPoolManagerMBeanImpl.java:135) ... 213 more Caused by: javax.management.InstanceAlreadyExistsException: oracle.ucp.admin:name=UniversalConnectionPoolManagerMBean already registered. at org.jboss.mx.server.registry.BasicMBeanRegistry.add(BasicMBeanRegistry.java:756) at org.jboss.mx.server.registry.BasicMBeanRegistry.registerMBean(BasicMBeanRegistry.java:233) at sun.reflect.GeneratedMethodAccessor75.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:157) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:96) at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:138) at org.jboss.mx.server.Invocation.invoke(Invocation.java:90) at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:140) at org.jboss.mx.server.Invocation.invoke(Invocation.java:90) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:668) at org.jboss.mx.server.MBeanServerImpl$3.run(MBeanServerImpl.java:1431) at java.security.AccessController.doPrivileged(Native Method) at org.jboss.mx.server.MBeanServerImpl.registerMBean(MBeanServerImpl.java:1426) at org.jboss.mx.server.MBeanServerImpl.registerMBean(MBeanServerImpl.java:376) at oracle.ucp.admin.UniversalConnectionPoolManagerMBeanImpl$2.run(UniversalConnectionPoolManagerMBeanImpl.java:141) ... 215 more Definition of data source bean: <bean id="oracleDataSource" class="oracle.ucp.jdbc.PoolDataSourceFactory" factory-method="getPoolDataSource"> <!-- hard coded properties --> <property name="connectionFactoryClassName" value="oracle.jdbc.pool.OracleDataSource" /> <property name="validateConnectionOnBorrow" value="true" /> <property name="connectionPoolName" value="ORACLE_CONNECTION_POOL" /> ... </bean> Does anyone know how to fix this problem?

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  • Cannot open xls file in IE

    - by Vladimir Bezugliy
    We have JSF web application that generates XLS file and gives user link to thes file. All works fine if access this file via HTTP. But IE(8) cannot open/save this xls file via HTTPS. There is following error message: Internet Explorer cannot download ...466088C5C313F92808BDB0AFF3447 from testhost. Internet Explorer was not able to open this Internet site. The requested site is either unavailable or cannot be found. Please try again later. I can open the same document via HTTPS in Firefox and in Chrome. What can be the problem with IE? Headers: HTTP/1.1 200 OK Date: Fri, 18 Jun 2010 14:45:42 GMT Server: Apache-Coyote/1.1 X-Powered-By: Servlet 2.5; JBoss-5.0/JBossWeb-2.1 X-UA-Compatible: IE=EmulateIE7 Last-Modified: Fri, 18 Jun 2010 14:45:11 GMT Cache-control: max-age=0, no-store, no-cache Pragma: no-cache Expires: 0 Content-Type: application/vnd.ms-excel Content-Length: 6656 Keep-Alive: timeout=5, max=100 Connection: Keep-Alive

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  • How to turn on gzip compression in JBoss 5 ?

    - by Vladimir Bezugliy
    I added following file deployers\jbossweb.deployer\server.xml <Connector compression="force" compressionMinSize="512" noCompressionUserAgents="gozilla, traviata" compressableMimeType="text/html,text/xml,image/png,text/css,text/javascript"> </Connector> But fiddler shows that jboss does not compress responses. How to ensure that gzip compression in JBoss is turned on? Is it possible to check it in jmx-console?

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  • "svn: Delta source ended unexpectedly" and proxy server

    - by Vladimir Bezugliy
    I cannot checkout working copy if I use proxy server. SVN starting to checkout files but, checkout several files but then stops and shows following error: svn: Delta source ended unexpectedly I can checkout working copy if I work without proxy server. But I constantly have problems if I work via proxy. Is this problem with proxy server or with svn? UPDATED: I tried to access other svn repositories located on different servers via proxy and it seems to me that I have problem only with one svn server. Other svn servers are accessible via proxy server.

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  • Different versions of JBoss on the same host

    - by Vladimir Bezugliy
    I have JBoss 4 installed on my PC to directory C:\JBoss4 And environment variable JBOSS_HOME set to this directory: JBOSS_HOME=C:\JBoss4 I need to install JBoss 5.1 on the same PC. I installed it into C:\JBoss51 In order to start JBoss 5.1 on the same host where JBoss 4 was already started, I need to redefine properties jboss.home.dir, jboss.home.url, jboss.service.binding.set: C:\JBoss51\bin\run.sh -Djboss.home.dir=C:/JBoss51 \ -Djboss.home.url=file:/C:/JBoss51 \ -Djboss.service.binding.set=ports-01 But in C:\JBoss51\bin\run.sh I can see following code: … if [ "x$JBOSS_HOME" = "x" ]; then # get the full path (without any relative bits) JBOSS_HOME=`cd $DIRNAME/..; pwd` fi export JBOSS_HOME … runjar="$JBOSS_HOME/bin/run.jar" JBOSS_BOOT_CLASSPATH="$runjar" And this code does not depend either on jboss.home.dir or on jboss.home.dir. So when I start JBoss 5.1 script will use jar files from JBoss 4.3? Is it correct? Should I redefine environment variable JAVA_HOME when I start JBoss 5.1? In this case script will use correct jar files. Or if I redefined properties jboss.home.dir, jboss.home.url then JBoss will not use any variables set in run.sh? How does it works?

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  • Cannot stop Oracle Queue - Could not find program unit being called: "SYS.DBMS_ASSERT"

    - by Vladimir Bezugliy
    Cannot stop and drop oracle Queue. Following code BEGIN DBMS_AQADM.STOP_QUEUE ( queue_name => 'TEST_QUEUE'); DBMS_AQADM.DROP_QUEUE( queue_name => 'TEST_QUEUE'); END; / produces following errors: ERROR at line 1: ORA-04068: existing state of packages has been discarded ORA-04065: not executed, altered or dropped stored procedure "SYS.DBMS_ASSERT" ORA-06508: PL/SQL: could not find program unit being called: "SYS.DBMS_ASSERT" ORA-06512: at "SYS.DBMS_AQADM_SYS", line 3365 ORA-06512: at "SYS.DBMS_AQADM", line 167 ORA-06512: at line 5 What can be the root cause of this problem?

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  • CONSOLE appender was turned off. But JBoss still writes some traces to STDOUT

    - by Vladimir Bezugliy
    CONSOLE appender was turned off. But JBoss still writes some traces to STDOUT during startup. Why? C:\as\jboss-5.1.0.GA\bin>start.cmd Calling C:\as\jboss-5.1.0.GA\bin\run.conf.bat =============================================================================== JBoss Bootstrap Environment JBOSS_HOME: C:\as\jboss-5.1.0.GA JAVA: C:\as\jdk1.6.0_07\bin\java JAVA_OPTS: -Dprogram.name=run.bat -Xms512M -Xmx758M -XX:MaxPermSize=256M -server CLASSPATH: C:\as\jboss-5.1.0.GA\bin\run.jar =============================================================================== 13:11:25,080 INFO [ServerImpl] Starting JBoss (Microcontainer)... 13:11:25,080 INFO [ServerImpl] Release ID: JBoss [The Oracle] 5.1.0.GA (build: SVNTag=JBoss_5_1_0_GA date=200905221053) 13:11:25,080 INFO [ServerImpl] Bootstrap URL: null 13:11:25,080 INFO [ServerImpl] Home Dir: C:\as\jboss-5.1.0.GA 13:11:25,080 INFO [ServerImpl] Home URL: file:/C:/as/jboss-5.1.0.GA/ 13:11:25,080 INFO [ServerImpl] Library URL: file:/C:/as/jboss-5.1.0.GA/lib/ 13:11:25,080 INFO [ServerImpl] Patch URL: null 13:11:25,080 INFO [ServerImpl] Common Base URL: file:/C:/as/jboss-5.1.0.GA/common/ 13:11:25,080 INFO [ServerImpl] Common Library URL: file:/C:/as/jboss-5.1.0.GA/common/lib/ 13:11:25,080 INFO [ServerImpl] Server Name: web 13:11:25,080 INFO [ServerImpl] Server Base Dir: C:\as\jboss-5.1.0.GA\server 13:11:25,080 INFO [ServerImpl] Server Base URL: file:/C:/as/jboss-5.1.0.GA/server/ 13:11:25,080 INFO [ServerImpl] Server Config URL: file:/C:/as/jboss-5.1.0.GA/server/web/conf/ 13:11:25,080 INFO [ServerImpl] Server Home Dir: C:\as\jboss-5.1.0.GA\server\web 13:11:25,080 INFO [ServerImpl] Server Home URL: file:/C:/as/jboss-5.1.0.GA/server/web/ 13:11:25,080 INFO [ServerImpl] Server Data Dir: C:\as\jboss-5.1.0.GA\server\web\data ...

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