is there a way to know whether tun/tap interface is opened?

Asked Feb 19 '13 at 15:01

Active Feb 19 '13 at 15:06

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I am making an application using tun interface tun0. I have been successfully able to send and receive packets through the interface. Is there any way to know when the tun interface is opened as in ifconfig tun0 up?

I want do some part of my underlying device initialization only when the interface is active. (added later) I am following the examples from http://backreference.org/2010/03/26/tuntap-interface-tutorial/

edited Feb 19 '13 at 15:06

asked Feb 19 '13 at 15:01

hiteshradia

http://stackoverflow.com/questions/12101919/how-do-i-open-a-tun-device-created-with-ip-tuntap – Satish Feb 19 '13 at 15:08
its not a duplicate. one way i thought of is that we can know that interface has been opened(using `ifconfig` or `ip link set`) is when the first packet is read. – hiteshradia Feb 24 '13 at 15:33

is there a way to know whether tun/tap interface is opened?

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