diff options
| -rw-r--r-- | tun/tun_linux.go | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/tun/tun_linux.go b/tun/tun_linux.go index e0c9878..46eb171 100644 --- a/tun/tun_linux.go +++ b/tun/tun_linux.go @@ -55,6 +55,11 @@ func (tun *NativeTun) routineHackListener() { /* This is needed for the detection to work across network namespaces * If you are reading this and know a better method, please get in touch. */ + last := 0 + const ( + up = 1 + down = 2 + ) for { sysconn, err := tun.tunFile.SyscallConn() if err != nil { @@ -68,13 +73,19 @@ func (tun *NativeTun) routineHackListener() { } switch err { case unix.EINVAL: - // If the tunnel is up, it reports that write() is - // allowed but we provided invalid data. - tun.events <- EventUp + if last != up { + // If the tunnel is up, it reports that write() is + // allowed but we provided invalid data. + tun.events <- EventUp + last = up + } case unix.EIO: - // If the tunnel is down, it reports that no I/O - // is possible, without checking our provided data. - tun.events <- EventDown + if last != down { + // If the tunnel is down, it reports that no I/O + // is possible, without checking our provided data. + tun.events <- EventDown + last = down + } default: return } |