You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
375 lines
8.2 KiB
375 lines
8.2 KiB
#!/bin/sh /etc/rc.common
|
|
|
|
START=19
|
|
USE_PROCD=1
|
|
PROG=/usr/sbin/dhcpd
|
|
|
|
lease_file=/tmp/dhcpd.leases
|
|
config_file=/tmp/run/dhcpd.conf
|
|
|
|
time2seconds() {
|
|
local timestring=$1
|
|
local multiplier number suffix
|
|
|
|
suffix="${timestring//[0-9 ]}"
|
|
number="${timestring%%$suffix}"
|
|
[ "$number$suffix" != "$timestring" ] && return 1
|
|
case "$suffix" in
|
|
"" | s)
|
|
multiplier=1
|
|
;;
|
|
m)
|
|
multiplier=60
|
|
;;
|
|
h)
|
|
multiplier=3600
|
|
;;
|
|
d)
|
|
multiplier=86400
|
|
;;
|
|
w)
|
|
multiplier=604800
|
|
;;
|
|
*)
|
|
return 1
|
|
;;
|
|
esac
|
|
echo $(( number * multiplier ))
|
|
}
|
|
|
|
# duplicated from dnsmasq init script
|
|
hex_to_hostid() {
|
|
local var="$1"
|
|
local hex="${2#0x}" # strip optional "0x" prefix
|
|
|
|
if [ -n "${hex//[0-9a-fA-F]/}" ]; then
|
|
# is invalid hex literal
|
|
return 1
|
|
fi
|
|
|
|
# convert into host id
|
|
export "$var=$(
|
|
printf "%0x:%0x" \
|
|
$(((0x$hex >> 16) % 65536)) \
|
|
$(( 0x$hex % 65536))
|
|
)"
|
|
|
|
return 0
|
|
}
|
|
|
|
typeof() {
|
|
echo "$1" | awk '
|
|
/^\d+\.\d+\.\d+\.\d+$/ { print "ip\n"; next; }
|
|
/^(true|false)$/ { print "bool\n"; next; }
|
|
/^\d+$/ { print "integer\n"; next; }
|
|
/^"[^"]*"$/ { print "string\n"; next; }
|
|
{ print "other\n"; next; }
|
|
'
|
|
}
|
|
|
|
explode() {
|
|
local arg="$1"
|
|
|
|
echo "$arg" | sed -e 's/\./, /g'
|
|
}
|
|
|
|
append_routes() {
|
|
local tuple tuples="$1"
|
|
local string=
|
|
|
|
local IFS=','
|
|
for tuple in $tuples; do
|
|
local network prefix router save octets compacted
|
|
|
|
save="${tuple% *}"
|
|
router="${tuple#${save} }"
|
|
|
|
network="${save%/[0-9]*}"
|
|
prefix="${save##${network}}"
|
|
prefix="${prefix:1}"
|
|
|
|
octets=$((($prefix + 7) / 8))
|
|
compacted="$(echo "$network" | cut -d. -f1-$octets)"
|
|
|
|
string="${string:+, }$(explode "$prefix.$compacted.$router")"
|
|
done
|
|
|
|
echo " option classless-ipv4-route $string;"
|
|
}
|
|
|
|
append_dhcp_options() {
|
|
local tuple="$1"
|
|
|
|
# strip redundant "option:" prefix
|
|
tuple="${tuple#option:}"
|
|
|
|
local tag="${tuple%%,*}"
|
|
local values="${tuple#$tag,}"
|
|
|
|
local formatted value
|
|
local IFS=$', \n'
|
|
for value in $values; do
|
|
# detect type of $value and quote if necessary
|
|
case $(typeof "$value") in
|
|
ip|bool|integer|string)
|
|
;;
|
|
other)
|
|
value="\"$value\""
|
|
;;
|
|
esac
|
|
formatted="$formatted${formatted:+, }$value"
|
|
done
|
|
echo " option $tag $formatted;"
|
|
}
|
|
|
|
static_host_add() {
|
|
local cfg="$1"
|
|
local broadcast hostid macn macs mac name ip leasetime
|
|
|
|
config_get macs "$cfg" "mac"
|
|
[ -n "$macs" ] || return 0
|
|
config_get name "$cfg" "name"
|
|
[ -n "$name" ] || return 0
|
|
config_get ip "$cfg" "ip"
|
|
[ -n "$ip" ] || return 0
|
|
|
|
config_get_bool broadcast "$cfg" "broadcast" 0
|
|
config_get dns "$cfg" "dns"
|
|
config_get gateway "$cfg" "gateway"
|
|
config_get leasetime "$cfg" "leasetime"
|
|
if [ -n "$leasetime" ] ; then
|
|
leasetime="$(time2seconds "$leasetime")"
|
|
[ "$?" -ne 0 ] && return 1
|
|
fi
|
|
|
|
config_get hostid "$cfg" "hostid"
|
|
if [ -n "$hostid" ] ; then
|
|
hex_to_hostid hostid "$hostid" || return 1
|
|
fi
|
|
|
|
macn=0
|
|
for mac in $macs; do
|
|
macn=$(( macn + 1 ))
|
|
done
|
|
|
|
for mac in $macs; do
|
|
local secname="$name"
|
|
if [ $macn -gt 1 ] ; then
|
|
secname="${name}-${mac//:}"
|
|
fi
|
|
echo "host $secname {"
|
|
echo " hardware ethernet $mac;"
|
|
echo " fixed-address $ip;"
|
|
echo " option host-name \"$name\";"
|
|
if [ "$broadcast" -eq 1 ] ; then
|
|
echo " always-broadcast true;"
|
|
fi
|
|
if [ -n "$leasetime" ] ; then
|
|
echo " default-lease-time $leasetime;"
|
|
echo " max-lease-time $leasetime;"
|
|
fi
|
|
if [ -n "$hostid" ] ; then
|
|
echo " option dhcp-client-identifier $hostid;"
|
|
fi
|
|
if [ -n "$dns" ] ; then
|
|
echo " option domain-name-servers $dns;"
|
|
fi
|
|
if [ -n "$gateway" ] ; then
|
|
echo " option routers $gateway;"
|
|
fi
|
|
config_list_foreach "$cfg" "routes" append_routes
|
|
config_list_foreach "$cfg" "dhcp_option" append_dhcp_options
|
|
echo "}"
|
|
done
|
|
}
|
|
|
|
static_hosts() {
|
|
config_foreach static_host_add host "$@"
|
|
}
|
|
|
|
gen_dhcp_subnet() {
|
|
local cfg="$1"
|
|
|
|
echo "subnet $NETWORK netmask $NETMASK {"
|
|
echo " range $START $END;"
|
|
echo " option subnet-mask $netmask;"
|
|
if [ "$BROADCAST" != "0.0.0.0" ] ; then
|
|
echo " option broadcast-address $BROADCAST;"
|
|
fi
|
|
if [ "$dynamicdhcp" -eq 0 ] ; then
|
|
if [ "$authoritative" -eq 1 ] ; then
|
|
echo " deny unknown-clients;"
|
|
else
|
|
echo " ignore unknown-clients;"
|
|
fi
|
|
fi
|
|
if [ -n "$leasetime" ] ; then
|
|
echo " default-lease-time $leasetime;"
|
|
echo " max-lease-time $leasetime;"
|
|
fi
|
|
echo " option routers $gateway;"
|
|
echo " option domain-name-servers $DNS;"
|
|
config_list_foreach "$cfg" "routes" append_routes
|
|
config_list_foreach "$cfg" "dhcp_option" append_dhcp_options
|
|
echo "}"
|
|
}
|
|
|
|
dhcpd_add() {
|
|
local cfg="$1"
|
|
local dhcp6range="::"
|
|
local dynamicdhcp end gateway ifname ignore leasetime limit net netmask
|
|
local proto networkid start subnet
|
|
local IP NETMASK BROADCAST NETWORK PREFIX DNS START END
|
|
|
|
config_get_bool ignore "$cfg" "ignore" 0
|
|
[ "$ignore" = "0" ] || return 0
|
|
|
|
config_get net "$cfg" "interface"
|
|
[ -n "$net" ] || return 0
|
|
|
|
config_get start "$cfg" "start"
|
|
[ -n "$start" ] || return 0
|
|
|
|
config_get limit "$cfg" "limit"
|
|
[ -n "$limit" ] || return 0
|
|
|
|
network_get_subnet subnet "$net" || return 0
|
|
network_get_device ifname "$net" || return 0
|
|
network_get_protocol proto "$net" || return 0
|
|
|
|
[ static = "$proto" ] || return 0
|
|
|
|
config_get_bool dynamicdhcp "$cfg" "dynamicdhcp" 1
|
|
|
|
dhcp_ifs="$dhcp_ifs $ifname"
|
|
|
|
eval "$(ipcalc.sh $subnet $start $limit)"
|
|
|
|
config_get netmask "$cfg" "netmask" "$NETMASK"
|
|
config_get leasetime "$cfg" "leasetime"
|
|
if [ -n "$leasetime" ] ; then
|
|
leasetime="$(time2seconds "$leasetime")"
|
|
[ "$?" -ne 0 ] && return 1
|
|
fi
|
|
|
|
if network_get_dnsserver dnsserver "$net" ; then
|
|
for dnsserv in $dnsserver ; do
|
|
DNS="$DNS${DNS:+, }$dnsserv"
|
|
done
|
|
else
|
|
DNS="$IP"
|
|
fi
|
|
|
|
if ! network_get_gateway gateway "$net" ; then
|
|
gateway="$IP"
|
|
fi
|
|
|
|
gen_dhcp_subnet "$cfg" >> $config_file
|
|
}
|
|
|
|
general_config() {
|
|
local always_broadcast boot_unknown_clients log_facility
|
|
local default_lease_time max_lease_time
|
|
config_get_bool always_broadcast "isc_dhcpd" "always_broadcast" 0
|
|
config_get_bool authoritative "isc_dhcpd" "authoritative" 1
|
|
config_get_bool boot_unknown_clients "isc_dhcpd" "boot_unknown_clients" 1
|
|
config_get default_lease_time "isc_dhcpd" "default_lease_time" 3600
|
|
config_get max_lease_time "isc_dhcpd" "max_lease_time" 86400
|
|
config_get log_facility "isc_dhcpd" "log_facility"
|
|
|
|
config_get domain "isc_dhcpd" "domain"
|
|
|
|
[ $always_broadcast -eq 1 ] && echo "always-broadcast true;"
|
|
[ $authoritative -eq 1 ] && echo "authoritative;"
|
|
[ $boot_unknown_clients -eq 0 ] && echo "boot-unknown-clients false;"
|
|
|
|
default_lease_time="$(time2seconds "$default_lease_time")"
|
|
[ "$?" -ne 0 ] && return 1
|
|
max_lease_time="$(time2seconds "$max_lease_time")"
|
|
[ "$?" -ne 0 ] && return 1
|
|
|
|
if [ -n "$log_facility" ] ; then
|
|
echo "log-facility $log_facility;"
|
|
fi
|
|
echo "default-lease-time $default_lease_time;"
|
|
echo "max-lease-time $max_lease_time;"
|
|
|
|
[ -n "$domain" ] && echo "option domain-name \"$domain\";"
|
|
|
|
echo -e "\n# additional codes\noption classless-ipv4-route code 121 = array of { unsigned integer 8 };\n"
|
|
|
|
rm -f /tmp/resolv.conf
|
|
echo "# This file is generated by the DHCPD service" > /tmp/resolv.conf
|
|
[ -n "$domain" ] && echo "domain $domain" >> /tmp/resolv.conf
|
|
echo "nameserver 127.0.0.1" >> /tmp/resolv.conf
|
|
}
|
|
|
|
# base procd hooks
|
|
|
|
boot() {
|
|
DHCPD_BOOT=1
|
|
start "$@"
|
|
}
|
|
|
|
start_service() {
|
|
local domain dhcp_ifs authoritative
|
|
|
|
if [ -n "$DHCPD_BOOT" ] ; then
|
|
return 0
|
|
fi
|
|
|
|
if [ ! -e $lease_file ] ; then
|
|
touch $lease_file
|
|
fi
|
|
|
|
if [ -e "/etc/dhcpd.conf" ] ; then
|
|
config_file="/etc/dhcpd.conf"
|
|
else
|
|
. /lib/functions/network.sh
|
|
|
|
config_load dhcp
|
|
|
|
general_config > $config_file
|
|
|
|
config_foreach dhcpd_add dhcp
|
|
|
|
static_hosts >> $config_file
|
|
|
|
[ -z "$dhcp_ifs" ] && return 0
|
|
fi
|
|
|
|
procd_open_instance
|
|
procd_set_param command $PROG -q -f -cf $config_file -lf $lease_file $dhcp_ifs
|
|
procd_close_instance
|
|
}
|
|
|
|
reload_service() {
|
|
rc_procd start_service "$@"
|
|
prodcd_send_signal dhcpd "$@"
|
|
}
|
|
|
|
add_interface_trigger() {
|
|
local cfg=$1
|
|
local trigger ignore
|
|
|
|
config_get trigger "$cfg" interface
|
|
config_get_bool ignore "$cfg" ignore 0
|
|
|
|
if [ -n "$trigger" -a $ignore -eq 0 ] ; then
|
|
procd_add_reload_interface_trigger "$trigger"
|
|
fi
|
|
}
|
|
|
|
service_triggers() {
|
|
if [ -n "$DHCPD_BOOT" ] ; then
|
|
# Make the first start robust to slow interfaces; wait a while
|
|
procd_add_raw_trigger "interface.*.up" 5000 /etc/init.d/dhcpd restart
|
|
|
|
else
|
|
# reload with normal parameters
|
|
procd_add_reload_trigger "network" "dhcp"
|
|
config_load dhcp
|
|
config_foreach add_interface_trigger dhcp
|
|
fi
|
|
}
|
|
|