summaryrefslogtreecommitdiffstats
path: root/package/dnsmasq/files/dnsmasq.init
blob: 14c77fb013217f541762c43b0fc602a7490da2c5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
#!/bin/sh /etc/rc.common
# Copyright (C) 2006 OpenWrt.org

START=60

dhcp_calc() {
	local ip="$1"
	local res=0
	
	while [ -n "$ip" ]; do
		part="${ip%%.*}"
		res="$(($res * 256))"
		res="$(($res + $part))"
		[ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
	done
	echo "$res"
}

dhcp_add() {
	local cfg="$1"

	config_get net "$cfg" interface
	[ -n "$net" ] || return 0
	
	config_get ifname "$net" ifname
	[ -n "$ifname" ] || return 0
	
	config_get_bool ignore "$cfg" ignore
	[ "$ignore" -gt 0 ] && {
		append args "-I $ifname"
		return 0
	}
	
	config_get proto "$net" proto
	[ static = "$proto" ] || return 0
	
	config_get ipaddr "$net" ipaddr
	config_get netmask "$net" netmask

	# check for an already active dhcp server on the interface, unless 'force' is set
	config_get_bool force "$cfg" force 0
	[ "$force" -gt 0 ] || {
		udhcpc -n -q -R -s /bin/true -t 1 -i $ifname >&- && return 0
	}
	
	config_get start "$cfg" start
	config_get end "$cfg" end
	config_get leasetime "$cfg" leasetime
	config_get options "$cfg" options

	leasetime="${leasetime:-12h}"
	start="$(dhcp_calc "${start:-100}")"
	end="$((${end:-150} + 1))"
	eval "$(ipcalc.sh $ipaddr $netmask $start $end)"
	append args "-F $START,$END,$NETMASK,$leasetime${options:+ $options}"
}

start() {
	include /lib/network
	scan_interfaces
	config_load /var/state/network
	config_load dhcp

	args=""
	config_foreach dhcp_add dhcp
	
	dnsmasq $args && {
		rm -f /tmp/resolv.conf
		cat > /tmp/resolv.conf <<EOF
nameserver 127.0.0.1
search lan
EOF
	}
}

stop() {
	killall dnsmasq
}