Re: [Openvpn-users] BUG in DNS resolving..... + ZEBRA/OSPF and OPENVPN

[Erich Titl <erich.titl@xxxxxxxx>]

Bartlomiej Solarz-Niesluchowski wrote:

> At 23:01 2005-05-11, you wrote:
>
> > Bartlomiej Solarz-Niesluchowski wrote:
> >
> > > Good Morning!
> > > I want to CONFIRM the BUG in openvpn and DNS resolving:
> > > http://openvpn.net/archive/openvpn-users/2005-04/msg00229.html - on 
> > > my router ADSL connection needs some time to be up, when openvpn 
> > > starts BEFORE internet connection (I have /etc/resolv.conf be made 
> > > from DHCP ADSL connection) it try to resolve hostname of the other 
> > > end of the OPENVPN tunnel infinite try to resolv DNS name without 
> > > success.....
> > > (naturally after succesfully established ADSL connection resolving 
> > > thu system work, but openvpn tries infinite without success).
> >
> >
> > Is this typical for OpenVPN or for anything that uses the resolver 
> > library?
>
>
> resolver library works - command host resolves FQDN - it is only OpenVPN

The host command is of course a single instance which is terminated and 
reloads the resolver code at each invocation.

I looked in socket.c I believe it will retry for quite some time, 
possibly configurable.

     /*
      * Resolve hostname
      */
      while (true)
       {
         /* try hostname lookup */
         h = gethostbyname (hostname);

         if (signal_received)
           {
             get_signal (signal_received);
             if (*signal_received) /* were we interrupted by a signal? */
               {
                 h = NULL;
                 if (*signal_received == SIGUSR1) /* ignore SIGUSR1 */
                   {
                     msg (level, "RESOLVE: Ignored SIGUSR1 signal 
received during DNS resolution attempt");
                     *signal_received = 0;
                   }
                 else
                   goto done;
               }
           }
         /* success? */
         if (h)
           break;

         /* resolve lookup failed, should we
            continue or fail? */

         level = msglevel;
         if (resolve_retries > 0)
           level = D_RESOLVE_ERRORS;

         msg (level,
              fmt,
              hostname,
              h_errno_msg (h_errno));

         if (--resolve_retries <= 0)
           goto done;

         openvpn_sleep (fail_wait_interval);
       }

cheers

Erich

____________________________________________
Openvpn-users mailing list
Openvpn-users@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/openvpn-users