Re: [gentoo-user] How can I force net.ath0 to use a certain channel?

[Daevid Vincent]

On Friday 30 March 2007 1:11 am, Neil Bothwick wrote:
> On Thu, 29 Mar 2007 22:20:21 -0700, Daevid Vincent wrote:
>
> > Please tell me there is some way to tweak my /etc/conf.d/wireless (or
> > anything for that matter), so that I can tell it, "hey, when connecting
> > to 'MATRIX', always use 802.11b and/or a certain channel range
> > (presumably in the 'b' range)".
>
> You can do this globally for the interface, with channel_ath0. You could
> probably use the preassociate() function to do it on a per-essid basis.
> See wireless.example.
>
> > Furthermore, it would REALLY be great if I could do something whereby,
> > if I have net.eth0 (i.e. CAT5 cable) then don't start net.ath0, else
> > try net.ath0. Right now I have net.ath0 disabled by default because I
> > hate when it starts up when I'm plugged in at work, as my traffic seems
> > to go over the "slower" ath0 rather than the faster eth0 port. ?! I
> > have ifplugd installed, but I don't think it can manage this kind of
> > (seemingly obvious and intelligent) decision.
>
> ifplugd's task is to signal when eth0's cable is connected or
> disconnected, not make decisions about other interfaces for you.
>
> Use the pre-up function in /etc/conf.d/net.
>
> preup() {
> 	if [ ${IFACE} == "ath0" ] && /etc/init.d/net.eth0 --quiet status
> 	then
> 		return 1
> 	fi
> }
>
> This will prevent ath0 starting if eth0 is connected.

Thanks Neil for the help, unfortunately it didn't seem to work for me...

locutus conf.d # /etc/init.d/net.ath0 start
 * Starting ath0
 *   Running preup function
/etc/conf.d/net: line 10:         if: command not found
/etc/conf.d/net: line 11:         then: command not found
/etc/conf.d/net: line 12:                 return: command not found
/etc/conf.d/net: line 13:         fi: command not found
 *     preup ath0 failed
                                                                                                                               [ !! ]
locutus conf.d # cat /etc/conf.d/net
# This blank configuration will automatically use DHCP for any net.*
# scripts in /etc/init.d.  To create a more complete configuration,
# please review /etc/conf.d/net.example and save your configuration
# in /etc/conf.d/net (this file :]!).
dhcpcd_eth0="-t 10"
dhcpcd_ath0="-t 30"
dhcpcd_wlan0="-t 20"

preup() {
        if [ ${IFACE} == "ath0" ] && /etc/init.d/net.eth0 --quiet status
        then
                return 1
        fi
}
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