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#!/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"
}
set_classless_routes() {
local max=128
local type
while [ -n "$1" -a -n "$2" -a $max -gt 0 ]; do
[ ${1##*/} -eq 32 ] && type=host || type=net
echo "udhcpc: adding route for $type $1 via $2"
route add -$type "$1" gw "$2" dev "$interface"
max=$(($max-1))
shift 2
done
}
setup_interface () {
local old_ip
local old_broadcast
local old_subnet
local old_router
local old_dns
local user_dns
local user_router
local user_metric
[ -n "$ifc" ] && {
old_ip="$(uci_get_state network "$ifc" ipaddr)"
old_broadcast="$(uci_get_state network "$ifc" broadcast)"
old_subnet="$(uci_get_state network "$ifc" netmask)"
}
[ "$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"
old_router="$(uci_get_state network "$ifc" gateway)"
user_router="$(uci_get network "$ifc" gateway)"
user_metric="$(uci_get network "$ifc" metric)"
[ -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 ${user_metric:+metric $user_metric} 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 "$router"
}
# CIDR STATIC ROUTES (rfc3442)
[ -n "$staticroutes" ] && set_classless_routes $staticroutes
[ -n "$msstaticroutes" ] && set_classless_routes $msstaticroutes
# DNS
old_dns=$(uci_get_state network "$ifc" dns)
old_domain=$(uci_get_state network "$ifc" dnsdomain)
user_dns=$(uci_get "network.$ifc.dns")
[ -n "$user_dns" ] && dns="$user_dns"
[ -n "$dns" ] && [ "$dns" != "$old_dns" -o -n "$user_dns" ] && {
echo "udhcpc: setting dns servers: $dns"
add_dns "$ifc" $dns
[ -n "$domain" ] && [ "$domain" != "$old_domain" ] && {
echo "udhcpc: setting dns domain: $domain"
sed -i -e "${old_domain:+/^search $old_domain$/d; }/^search $domain$/d" "${RESOLV_CONF}"
echo "search $domain" >> "${RESOLV_CONF}"
change_state network "$ifc" dnsdomain "$domain"
}
}
[ -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
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