On Wed, Mar 18, 2015 at 3:25 PM, M. Dietrich <m...@emdete.de> wrote:
> Package: vpnc
> Version: 0.5.3r550-2
> Severity: important
>
> the vpn can't be established with the message:
>
> vpnc-connect: can't initialise tunnel interface: Inappropriate ioctl
> for device
>
> short investigation shows that in case /dev/net/tun does not exists vpnc
> creates it with
>
> open("/dev/net/tun", O_RDWR|O_CREAT, 0666) = 3
>
Agree that what you found is bad.
In vpnc code, file
http://svn.unix-ag.uni-kl.de/vpnc/trunk/sysdep.c
at line 439, there is
if ((fd = open("/dev/net/tun", O_RDWR)) < 0) {
that is correct. So the problem is somewhere else.
During compile & linking, the open() with 2 arguments got the second
changed to "O_RDWR|O_CREAT" and the third "0666" added.
Or the Debian package adds a wrong patch to vpnc source code?
I have tested on my Arch Linux box x86_64 with gcc-multilib 4.9.2-3
and glibc 2.21-2 the following code:
#include <fcntl.h>
int main()
{
return open("/dev/net/tun", O_RDWR);
}
Compiled then run with "strace" it correctly reports:
open("/dev/net/tun", O_RDWR) = 3
Can you run the same test on your system?
Antonio
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