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#!/bin/sh # Sample udhcpc renew script RESOLV_CONF="/etc/udhcpc/resolv.conf" [ -n "$broadcast" ] && BROADCAST="broadcast $broadcast" [ -n "$subnet" ] && NETMASK="netmask $subnet" /sbin/ifconfig $interface $ip $BROADCAST $NETMASK if [ -n "$router" ] then echo "deleting routers" while /sbin/route del default gw 0.0.0.0 dev $interface do : done metric=0 for i in $router do if [ "$subnet" = "255.255.255.255" ]; then # special case for /32 subnets: # /32 instructs kernel to always use routing for all outgoing packets # (they can never be sent to local subnet - there is no local subnet for /32). # Used in datacenters, avoids the need for private ip-addresses between two hops. /sbin/ip route add $i dev $interface fi /sbin/route add default gw $i dev $interface metric $((metric++)) done fi # Only replace resolv.conf if we have at least one DNS server if [ -n "$dns" ] then echo -n > $RESOLV_CONF [ -n "$domain" ] && echo domain $domain >> $RESOLV_CONF for i in $dns do echo adding dns $i echo nameserver $i >> $RESOLV_CONF done fi