#!/bin/sh [ -z "$1" ] && echo "Error: should be run by udhcpc" && exit 1 . /etc/functions.sh include /lib/network RESOLV_CONF="/tmp/resolv.conf.auto" change_state () { [ -n "$ifc" ] || return uci_revert_state "$1" "$2" "$3" "$4" uci_set_state "$1" "$2" "$3" "$4" } uci_get() { [ -n "$ifc" ] || return uci -P /dev/null get "$1" 2>/dev/null } setup_interface () { local old_ip local old_broadcast local old_subnet local old_router local old_dns local user_dns local user_router [ -n "$ifc" ] && { config_get old_ip "$ifc" ipaddr config_get old_broadcast "$ifc" broadcast config_get old_subnet "$ifc" netmask } [ "$1" = "ifup" ] \ || [ "$ip" != "$old_ip" ] \ || [ "${broadcast:-+}" != "$old_broadcast" ] \ || [ "${subnet:-255.255.255.0}" != "$old_subnet" ] && { echo "udhcpc: ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+}" ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+} change_state network "$ifc" ipaddr "$ip" change_state network "$ifc" broadcast "${broadcast:-+}" change_state network "$ifc" netmask "${subnet:-255.255.255.0}" } # Default Route [ -n "$ifc" ] && { change_state network "$ifc" lease_gateway "$router" config_get old_router "$ifc" gateway user_router=$(uci_get "network.$ifc.gateway") [ -n "$user_router" ] && router="$user_router" } [ -n "$router" ] && [ "$router" != "0.0.0.0" ] && [ "$router" != "255.255.255.255" ] && [ "$router" != "$old_router" ] && { echo "udhcpc: setting default routers: $router" local valid_gw="" for i in $router ; do route add default gw $i dev $interface valid_gw="${valid_gw:+$valid_gw|}$i" done eval $(route -n | awk ' /^0.0.0.0\W{9}('$valid_gw')\W/ {next} /^0.0.0.0/ {print "route del -net "$1" gw "$2";"} ') change_state network "$ifc" gateway "$router" } # CIDR STATIC ROUTES (rfc3442) [ -n "$cidrroute" ] && { # This defines how many CIDR Routes can be assigned so that we do not enter # an endless loop on malformed data MAXCIDRROUTES=24; while [ ${MAXCIDRROUTES} -gt "0" ]; do # Format is # $MASK $NW $GW # $NW == AAA.BBB.CCC.DDD # $GW == EEE.FFF.CCC.DDD # $MASK AAA.[BBB].[CCC].[DDD] EEE.FFF.GGG.HHH # 1 2 3 4 5 6 7 8 9 MASK=$(echo $cidrroute | awk '{ print $1 }') if [ ${MASK} = "0" ] ; then # $MASK EEE.FFF.GGG.HHH # 1 2 3 5 6 NW="0" GW=$(echo $cidrroute | awk '{ print $2"."$3"."$4"."$5 }' ) elif [ ${MASK} -le "8" ] ; then # $MASK AAA EEE.FFF.GGG.HHH # 1 2 3 5 6 7 NW=$(echo $cidrroute | awk '{ print $2 }' ) GW=$(echo $cidrroute | awk '{ print $3"."$4"."$5"."$6 }' ) elif [ ${MASK} -le "16" ] ; then # $MASK AAA.BBB EEE.FFF.GGG.HHH # 1 2 3 5 6 7 8 NW=$(echo $cidrroute | awk '{ print $2"."$3 }' ) GW=$(echo $cidrroute | awk '{ print $4"."$5"."$6"."$7 }' ) elif [ ${MASK} -le "24" ] ; then # $MASK AAA.BBB.CCC EEE.FFF.GGG.HHH # 1 2 3 4 5 6 7 8 NW=$(echo $cidrroute | awk '{ print $2"."$3"."$4 }' ) GW=$(echo $cidrroute | awk '{ print $5"."$6"."$7"."$8 }' ) else # $MASK AAA.BBB.CCC.DDD EEE.FFF.GGG.HHH # 1 2 3 4 5 6 7 8 9 NW=$(echo $cidrroute | awk '{ print $2"."$3"."$4"."$5 }' ) GW=$(echo $cidrroute | awk '{ print $6"."$7"."$8"."$9 }' ) fi echo [$ROUTECOUNTER] Route Network: $NW/$MASK Gateway: $GW on $interface # TODO: Check for malformed data here to eliminate counter workaround # Malformed data is: ... or xxx... or xxx.yyy.. or xxx.yyy.zzz. [ -n "$NW" ] && [ -n "$GW" ] && { route add $NW gw $GW dev $interface } # Clear the strings incase they don't get set next time around if [ ${NW} = "0" ]; then NW="" fi TMP="$MASK $NW $GW " NW="" GW="" # Remove the '.' so that we can delete them from the input with sed TMP=$(echo $TMP | sed "s/\./ /g") # Remove the previous entry from cidrroute cidrroute=$(echo $cidrroute | sed "s/$TMP//g") # Add to counter let ROUTECOUNTER=$ROUTECOUNTER+1; let MAXCIDRROUTES=$MAXCIDRROUTES-1; # Leave the loop if cidrroutes is empty (we've parsed everything) [ ! -n "$cidrroute" ] && break done echo "done." } # DNS config_get old_dns "$ifc" dns user_dns=$(uci_get "network.$ifc.dns") [ -n "$user_dns" ] && dns="$user_dns" [ -n "$dns" ] && [ ! -s "${RESOLV_CONF}" -o "$dns" != "$old_dns" ] && { echo "udhcpc: setting dns servers: $dns" echo -n > "${RESOLV_CONF}.tmp" for i in $dns ; do echo "nameserver $i" >> "${RESOLV_CONF}.tmp" done ${domain:+echo search $domain} >> "${RESOLV_CONF}.tmp" mv "${RESOLV_CONF}.tmp" "$RESOLV_CONF" change_state network "$ifc" dnsdomain "$domain" change_state network "$ifc" dns "$dns" } [ -n "$ifc" ] || return # UCI State change_state network "$ifc" lease_server "$serverid" change_state network "$ifc" lease_acquired "$(date '+%s')" change_state network "$ifc" lease_lifetime "$lease" [ -n "$ntpsrv" ] && change_state network "$ifc" lease_ntpsrv "$ntpsrv" [ -n "$timesvr" ] && change_state network "$ifc" lease_timesrv "$timesvr" [ -n "$hostname" ] && change_state network "$ifc" lease_hostname "$hostname" [ -n "$timezone" ] && change_state network "$ifc" lease_timezone "$timezone" # Hotplug env -i ACTION="$1" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface } scan_interfaces applied= for ifc in $interfaces __default; do if [ "$ifc" = __default ]; then ifc="" [ -n "$applied" ] && continue else config_get ifname "$ifc" ifname [ "$ifname" = "$interface" ] || continue config_get proto "$ifc" proto [ "$proto" = "dhcp" ] || continue applied=true fi case "$1" in deconfig) ifconfig "$interface" 0.0.0.0 [ -n "$ifc" ] && { env -i ACTION="ifdown" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface config_get device "$ifc" device config_get ifname "$ifc" ifname config_get aliases "$ifc" aliases uci_revert_state network "$ifc" [ -n "$device" ] && uci_set_state network "$ifc" device "$device" [ -n "$ifname" ] && uci_set_state network "$ifc" ifname "$ifname" [ -n "$aliases" ] && uci_set_state network "$ifc" aliases "$aliases" } ;; renew) setup_interface update ;; bound) setup_interface ifup ;; esac done # user rules [ -f /etc/udhcpc.user ] && . /etc/udhcpc.user exit 0