[WLANware] proper location of resolv.conf

[Dan Flett]

If you'd prefer me to write this as a patch I will. :)

>I've noticed what looks like a few inconsistencies in FFF as to where
>resolv.conf actually resides.
>
>Currently /etc/resolv.conf symlinks to /var/etc/resolv.conf (via
>/rom/etc/resolv.conf)
>
>/sbin/ifup, which uses "INTERFACE_dns" nvram var to statically set a
>nameserver points at /etc/resolv.conf
>
>/usr/share/udhcpc/default.script puts dhcp-learned nameservers in
>/tmp/resolv.conf
>
>I believe the following changes should be made:
>/sbin/ifup should be changed so it writes nameservers directly to
>/tmp/resolv.conf
>
>/var/etc/resolv.conf should always symlink to /tmp/resolv.conf as a default
>in base-files - this achieves compatibility with openwrt and backwards
>compatibility with freifunk firmware
>
>S50dnsmasq should do this:
>if ff_dnsmasq != 0
>*then*
>delete /var/etc/resolv.conf -> /tmp/resolv.conf symlink
>/var/etc/resolv.conf should = "nameserver 127.0.0.1"
>and /var/etc/dnsmasq.conf should contain
>"resolv-file=/tmp/resolv.conf"
>
>Basically this achieves the following:
>
>upstream nameservers should always be stored in /tmp/resolv.conf
>
>if dnsmasq is not installed, the follwoing symlinks would be in place:
>/etc/resolv.conf -> /rom/etc/resolv.conf -> /var/etc/resolv.conf ->
>/tmp/resolv.conf
>
>if dnsmasq is installed and ff_dnsmasq != 0 the symlinks would work this
>way:
>/etc/resolv.conf -> /rom/etc/resolv.conf -> /var/etc/resolv.conf =
>"nameserver 127.0.0.1"
>
>this points local name resolution at dnsmasq - useful for logging, pinging
>hostnames
>
>dnsmasq gets it's upstream nameservers from /tmp/resolv.conf
>
>S50udhcpcd should
>
>
>Cheers,
>
>Dan
>
>
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