Date: Sun, 05 Sep 2004 01:13:10 +0200 From: Remko Lodder <remko@elvandar.org> To: FreeBSD Questions <freebsd-questions@FreeBSD.ORG> Subject: Re: Better way to get interface assigned to default route? Message-ID: <413A4C06.7070404@elvandar.org> In-Reply-To: <413A3F0E.3060508@elvandar.org> References: <001701c492a2$c806c2a0$f800000a@laptop> <413A3F0E.3060508@elvandar.org>
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Hi,
Markie forgot, and forwared this to the list, i forgot and didn't notice
it until now that it also had been sent to the list by Markie. So, i
will 'reply' this message to the Questions list as well just to keep you
guys and the archive updated.
Cheers!
Remko Lodder wrote:
> Markie wrote:
>
>> Suggesting I do `dhclient fxp1`? That's exactly my problem though :-)
>> That
>> uses /sbin/dhclient-script to do all of it's work, right? dhclient-script
>> tries to figure out the interface... or something to do with a default
>> route by doing that netstat -rn command.
>>
>> dhclient-script snippet...
>> ----
>> if [ x$alias_subnet_mask != x ]; then
>> alias_subnet_arg="netmask $alias_subnet_mask"
>> fi
>>
>> # Get the interface to which our default route is bound to.
>> if [ -x /usr/bin/netstat ]; then
>> if_defaultroute=`/usr/bin/netstat -rn \
>> | /usr/bin/grep "^default" \
>> | /usr/bin/awk '{print $6}'`
>> else
>> if_defaultroute="x"
>> fi
>>
>> if [ x$reason = xMEDIUM ]; then
>> eval "ifconfig $interface $medium"
>> eval "ifconfig $interface inet -alias 0.0.0.0 $medium" >/dev/null 2>&1
>> sleep 1
>> exit_with_hooks 0
>> fi
>> ---
>>
>> See it? Basically I am after some sort of command that might be able
>> to get
>> the interface with the default route assigned but quicker than netstat
>> -rn
>> since I have alot of routing table entries. Like I said, if there's no
>> other way I will just have to fix it so it's if_defaultroute = "fxp1".
>>
>> I've already had to make some changes to the script to get it to work
>> with
>> my modem anyway so it won't hurt me :-) I was just wondering if there was
>> any other nice way of doing it so that say if I changed the internet
>> interface to a vx card I wouldn't have to try and remember to change that
>> to vx0 (I _will_ forget I made the change :-)
>>
>
> Well, how come there is a default route if you use dhcp afterwards? my
> default route is delivered through dhcp.. so i cannot reside on a
> default entry because i dont have any... That's why i think that the
> default grep is a little bit weird actually, since most hosts dont have
> any routes at all at that point in time and then start dhclient <iface>
>
> And to be more exact:
>
> in /etc/rc.conf i have
> ifconfig_em0="DHCP" which starts ``dhclient em0'' for me... i never used
> dhclient-script, and didn't read it carefully yet to understand it.
>
> Perhaps this explains a bit...
>
> or i just dont get the question yet { have a long weekend, tired etc ;) }
>
> Cheers dude!
>
--
Kind regards,
Remko Lodder |remko@elvandar.org
Reporter DSINet |remko@dsinet.org
Projectleader Mostly-Harmless |remko@mostly-harmless.nl
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