netbsd: named tap devices not auto-created

[Gert Döring]

running OpenVPN --dev tap3 on NetBSD 7.0.1 only works if that device has been manually created by ifconfig tap3 create before - and then, it still isn't behaving "properly" because ifconfig/route changes are not cleaned up on exit.

Mainly recording this so someone can look into it.

Code in question is in tun.c around line 1600

      if (!dynamic_opened)
        {
          /* has named device existed before? if so, don't destroy at end */
          if ( if_nametoindex( dev ) > 0 )
            {
              msg (M_INFO, "TUN/TAP device %s exists previously, keep at program
 end", dev );
              tt->persistent_if = true;
            }

          if ((tt->fd = open (tunname, O_RDWR)) < 0)
            msg (M_ERR, "Cannot open TUN/TAP dev %s", tunname);
        }

adding an #ifdef TARGET_NETBSD .. else if strncmp(dev, tap) == 0 ... exec("ifconfig $dev create") would work, but not make the code much prettier... (plus, it needs destroy at tun_close).

[Gert Döring]

this is not high prio (nobody on the NetBSD side has ever asked for it), and will not make the imminent 2.4 release - bumping to 2.5

[Gert Döring]

I forgot to actually take it (well, I hoped someone else would just do the work, I think...) - but now I do.

Too late for 2.5, but, again, nobody else complained about -> so, 2.6

[Gert Döring]

Still an open issue, but no complaints, so not fixed for 2.6 -> bump to 2.7