Hi, I've noticed that stat/open call on /dev/tun always creates new interface, despite the fact that existing spare interfaces may be available. I believe that it's a bug, since the whole purpose of auto-cloning is to create new instance only when no existing one could be allocated. At least that's my reading of the manual page for the tun(4). <quote> If the sysctl(8) variable net.link.tun.devfs_cloning is non-zero, the tun interface permits opens on the special control device /dev/tun. When this device is opened, tun will return a handle for the lowest unused tun device (use devname(3) to determine which). </quote> -Maxim [root_at_sp1 /usr/home/sobomax]# ifconfig -a tun0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500 [root_at_sp1 /usr/home/sobomax]# stat /dev/tun 67174144 96 crw------- 1 uucp dialer 96 0 "May 2 22:21:28 2008" "May 2 22:21:28 2008" "May 2 22:21:28 2008" "Dec 31 23:59:59 1969" 4096 0 0 /dev/tun [root_at_sp1 /usr/home/sobomax]# ifconfig -a tun0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500 tun1: flags=8010<POINTOPOINT,MULTICAST> mtu 1500 [root_at_sp1 /usr/home/sobomax]# stat /dev/tun 67174144 99 crw------- 1 uucp dialer 99 0 "May 2 22:21:28 2008" "May 2 22:21:28 2008" "May 2 22:21:28 2008" "Dec 31 23:59:59 1969" 4096 0 0 /dev/tun [root_at_sp1 /usr/home/sobomax]# ifconfig -a tun0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500 tun1: flags=8010<POINTOPOINT,MULTICAST> mtu 1500 tun2: flags=8010<POINTOPOINT,MULTICAST> mtu 1500 [root_at_sp1 /usr/home/sobomax]# stat /dev/tun 67174144 105 crw------- 1 uucp dialer 105 0 "May 2 22:21:28 2008" "May 2 22:21:28 2008" "May 2 22:21:28 2008" "Dec 31 23:59:59 1969" 4096 0 0 /dev/tun [root_at_sp1 /usr/home/sobomax]# ifconfig -a tun0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500 tun1: flags=8010<POINTOPOINT,MULTICAST> mtu 1500 tun2: flags=8010<POINTOPOINT,MULTICAST> mtu 1500 tun3: flags=8010<POINTOPOINT,MULTICAST> mtu 1500Received on Thu Sep 18 2008 - 22:58:42 UTC
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