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