Description of problem: I have set loglevel of NetworkManager to DEBUG to exact more information why nm-openvpn-service-openvpn-helper is unable to accomplish network interface configuration. Actually the device (tap0) created and would be available for further operations (ifup, route table update etc.) but somehow it never happens. I cannot figure out actually the "call stack" among several external program calls, however I v found the particular error gets printed out from nm-udev-manager.c :: /sys/devices/virtual/net/tap0: couldn't determine device driver; ignoring..., which led me to the global function call, see beneath. Does any1 have idea why const gchar * g_udev_device_get_driver (GUdevDevice *device); routine call fails and in the end I am getting /sys/devices/virtual/net/tap0: couldn't determine device driver; ignoring... error message in the log, since *device is NULL? As far as I am concerned the device_creator () invokes somehow the global routine above and if it is so, the device_creator() does not succeed anything and hands over the NULL pointer. Has anyone idea ? Version-Release number of selected component (if applicable): NetworkManager-openvpn-0.8.999-1.fc15.i686 How reproducible: Steps to Reproduce: 1. Open NM GUI, enter gateway + certificates path + key + use LZO + use TAP 2. Save 3. VPN Conenctions -> Connect... Actual results: Here is the log : Jun 13 19:58:49 xfce nm-openvpn[1463]: TUN/TAP device tap0 opened Jun 13 19:58:49 xfce nm-openvpn[1463]: /usr/libexec/nm-openvpn-service-openvpn-helper tap0 1500 1574 init Jun 13 19:58:50 xfce NetworkManager[648]: <debug> [1307987930.5748] [nm-udev-manager.c:586] handle_uevent(): UDEV event: action 'add' subsys 'net' device 'tap0' Jun 13 19:58:50 xfce NetworkManager[648]: <warn> /sys/devices/virtual/net/tap0: couldn't determine device driver; ignoring... Jun 13 19:58:50 xfce NetworkManager[648]: <warn> VPN plugin failed: 2 Jun 13 19:58:50 xfce nm-openvpn[1463]: script failed: external program exited with error status: 1 Jun 13 19:58:50 xfce nm-openvpn[1463]: Exiting Expected results: Additional info: F15 runs as VM on a Windows 7
I see the same problem, on real hardware (a Thinkpad laptop) and with Fedora 14 However for me this is intermittent. I believe the crucial lines from your log (which I also see) are Jun 13 19:58:49 xfce nm-openvpn[1463]: /usr/libexec/nm-openvpn-service-openvpn-helper tap0 1500 1574 init Jun 13 19:58:50 xfce nm-openvpn[1463]: script failed: external program exited with error status: 1 It appears nm-openvpn attempts to execute nm-openvpn-service-openvpn-helper and this latter program gives exit code 1. The cause of THAT failure isn't logged and thus we can only speculate about it. One way forward may be to rename /usr/libexec/nm-openvpn-service-openvpn-helper and insert a shell script in its place which can run it under a debugger. If the helper emitted some more helpful message we could use ferror (frysk) to debug.
Hi Nick, Yeah that could be a workaround as well to get more information. As I wrote earlier I fetched the source code and found the error message in nm-udev-manager.c source file which is gets printed in our log just because an other function passes a NULL pointer to g_udev_device_get_driver() Here you can see my former post with a little more snippet. I did not debug through the entire call stack since I may not fix it after all. The helper of the NetworkManager is somehow miserable, since it should just invoke a dhcp client and insert a new entry in the route table. Try to export your OpenVPN configuration into a file and call openvpn <your_config> hopefully you get your tap device and you can get configured by dhclient. Sigmarsson http://forums.fedoraforum.org/showthread.php?t=265476 http://forums.fedoraforum.org/showthread.php?t=265021
Hello, Can anyone maybe explain what parameters nm-openvpn-service-openvpn-helper expects ? Is the entire interface configuration unsuccessful due lldpad ? I think some more parameters should be given for the helper tool yet. Kind regards, Sigmarsson Oct 2 01:01:18 xfce nm-openvpn[2647]: /usr/libexec/nm-openvpn-service-openvpn-helper tap0 1500 1574 init Oct 2 01:01:18 xfce NetworkManager[745]: <debug> [1317510078.961972] [nm-netlink-monitor.c:117] link_msg_handler(): netlink link message: iface idx 5 flags 0x1002 Oct 2 01:01:18 xfce lldpad[885]: evb_ifdown:port tap0 remove failed Oct 2 01:01:18 xfce lldpad[885]: vdp_ifdown:tap0 vdp data remove failed Oct 2 01:01:19 xfce NetworkManager[745]: <warn> VPN plugin failed: 2 Oct 2 01:01:19 xfce nm-openvpn[2647]: script failed: external program exited with error status: 1 Oct 2 01:01:19 xfce nm-openvpn[2647]: Exiting
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