'busybox'에 해당되는 글 1

  1. 2009.01.16 [BugFix] Continually renews IP regardless of nothing to change (modified) (2)
Few days ago, I wrote  how to fix udhcpc's bug. It worked very well before I recognized some problems. 

My busybox's version is 1.4.2-2.  I think that the bugfix doesn't match current version. 

So I restored it to my own version. 

#!/bin/sh
[ -z "$1" ] && echo "Error: should be run by udhcpc" && exit 1
. /etc/functions.sh
include /lib/network

RESOLV_CONF="/tmp/resolv.conf.auto"

hotplug_event() {
scan_interfaces
config_load /var/state/network
for ifc in $interfaces; do
config_get ifname $ifc ifname
[ "$ifname" = "$interface" ] || continue

config_get proto $ifc proto
[ "$proto" = "dhcp" ] || continue
[ ifup = "$1" ] && {
uci set "/var/state/network.$ifc.ipaddr=$ip"
uci set "/var/state/network.$ifc.netmask=${subnet:-255.255.255.0}"
uci set "/var/state/network.$ifc.dnsdomain=$domain"
uci set "/var/state/network.$ifc.dns=$dns"
uci set "/var/state/network.$ifc.gateway=$router"
}
env -i ACTION="$1" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
done
}

case "$1" in
deconfig)
#ifconfig $interface 0.0.0.0
#hotplug_event ifdown
;;
renew|bound)
#echo `date` >> /tmp/test
#old_ip="$(cat /tmp/state/network | grep ipaddr | sed "s/'//g" | awk '{print $4}')"
#echo $old_ip >> /tmp/test
#echo $ip >> /tmp/test
if [ "$old_ip" = "$ip" ]; then
#echo "same" >> /tmp/test
exit 0
else
ifconfig $interface 0.0.0.0
hotplug_event ifdown
ifconfig $interface $ip \
netmask ${subnet:-255.255.255.0} \
broadcast ${broadcast:-+}

[ -n "$router" ] && {
for i in $router ; do
echo "adding router $i"
route add default gw $i dev $interface
valid="$valid|$i"
done
echo "deleting old routes"
$(route -n | awk '/^0.0.0.0\W{9}('$valid')\W/ {next} /^0.0.0.0/ {print "route del -net "$1" gw "$2";"}')
}
[ -n "$dns" ] && {
echo -n > "${RESOLV_CONF}.tmp"
${domain:+echo search $domain} >> "${RESOLV_CONF}.tmp"
for i in $dns ; do
echo "adding dns $i"
echo "nameserver $i" >> "${RESOLV_CONF}.tmp"
done
mv "${RESOLV_CONF}.tmp" "$RESOLV_CONF"
}
hotplug_event ifup
# user rules
[ -f /etc/udhcpc.user ] && . /etc/udhcpc.user
fi
;;
esac

exit 0

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