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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
#!/bin/sh /etc/rc.common
# Copyright (C) 2007 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"
}
append_bool() {
local section="$1"
local option="$2"
local value="$3"
local _tmp
config_get_bool _tmp "$section" "$option"
[ "$_tmp" -gt 0 ] && append args "$3"
}
dnsmasq() {
local cfg="$1"
append_bool "$cfg" authoritative "-K"
append_bool "$cfg" nodaemon "-d"
append_bool "$cfg" domainneeded "-D"
append_bool "$cfg" filterwin2k "-f"
append_bool "$cfg" nohosts "-h"
append_bool "$cfg" nonegcache "-N"
append_bool "$cfg" strictorder "-o"
append_bool "$cfg" logqueries "-q"
append_bool "$cfg" noresolv "-R"
append_bool "$cfg" localise_queries "-y"
append_bool "$cfg" readethers "-Z"
append_bool "$cfg" dbus "-l"
config_get dnsforwardmax "$cfg" dnsforwardmax
dnsforwardmax="${dnsforwardmax:-150}"
append args "-0 $dnsforwardmax"
config_get port "$cfg" port
port="${port:-53}"
append args "-p $port"
config_get ednspacket_max "$cfg" ednspacket_max
ednspacket_max="${ednspacket_max:-1280}"
append args "-P $ednspacket_max"
config_get dhcpleasemax "$cfg" dhcpleasemax
dhcpleasemax="${dhcpleasemax:-150}"
append args "-X $dhcpleasemax"
config_get addnhosts "$cfg" addnhosts
config_get interface "$cfg" interface
config_get exceptinterface "$cfg" exceptinterface
config_get queryport "$cfg" queryport
config_get domain "$cfg" domain
}
dhcp_subscrid_add() {
local cfg="$1"
config_get name "$cfg" name
[ -n "$name" ] || return 0
config_get subscriberid "$cfg" subscriberid
[ -n "$subscriberid" ] || return 0
append args "--dhcp-subscrid=$name,$subscriberid"
dhcp_option_add "$cfg" "$name"
}
dhcp_remoteid_add() {
local cfg="$1"
config_get name "$cfg" name
[ -n "$name" ] || return 0
config_get remoteid "$cfg" remoteid
[ -n "$remoteid" ] || return 0
append args "--dhcp-remoteid=$name,$remoteid"
dhcp_option_add "$cfg" "$name"
}
dhcp_circuitid_add() {
local cfg="$1"
config_get name "$cfg" name
[ -n "$name" ] || return 0
config_get circuitid "$cfg" circuitid
[ -n "$circuitid" ] || return 0
append args "--dhcp-circuitid=$name,$circuitid"
dhcp_option_add "$cfg" "$name"
}
dhcp_userclass_add() {
local cfg="$1"
config_get name "$cfg" name
[ -n "$name" ] || return 0
config_get userclass "$cfg" userclass
[ -n "$userclass" ] || return 0
append args "--dhcp-userclass=$name,$userclass"
dhcp_option_add "$cfg" "$name"
}
dhcp_vendorclass_add() {
local cfg="$1"
config_get name "$cfg" name
[ -n "$name" ] || return 0
config_get vendorclass "$cfg" vendorclass
[ -n "$vendorclass" ] || return 0
append args "--dhcp-vendorclass=$name,$vendorclass"
dhcp_option_add "$cfg" "$name"
}
dhcp_host_add() {
local cfg="$1"
config_get name "$cfg" name
[ -n "$name" ] || return 0
config_get mac "$cfg" mac
[ -n "$mac" ] || return 0
append args "--dhcp-host=$mac,$ip"
dhcp_option_add "$cfg" "$name"
}
dhcp_mac_add() {
local cfg="$1"
config_get name "$cfg" name
[ -n "$name" ] || return 0
config_get mac "$cfg" mac
[ -n "$mac" ] || return 0
append args "--dhcp-mac=$name,$mac"
dhcp_option_add "$cfg" "$name"
}
dhcp_add() {
local cfg="$1"
config_get net "$cfg" interface
[ -n "$net" ] || return 0
config_get name "$cfg" name
[ -n "$name" ] || name="$net"
config_get ifname "$net" ifname
[ -n "$ifname" ] || return 0
append_bool "$cfg" ignore "-I $ifname"
config_get proto "$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 limit "$cfg" limit
config_get leasetime "$cfg" leasetime
config_get options "$cfg" options
leasetime="${leasetime:-12h}"
start="$(dhcp_calc "${start:-100}")"
limit="$((${limit:-150} + 1))"
eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
append args "--dhcp-range=$name,$START,$END,$NETMASK,$leasetime${options:+ $options}"
dhcp_option_add "$cfg" "$name"
}
dhcp_option_add () {
local cfg="$1"
local name="$2"
for count in $(seq 0 100); do
eval current_value=\$CONFIG_"$cfg"_dhcp"$count"
if [ -z "$current_value" ]; then
let "count-=1"
break
fi
append args "-O $name","$current_value"
done
}
start() {
include /lib/network
scan_interfaces
config_load dhcp
args=""
config_foreach dnsmasq dnsmasq
config_foreach dhcp_host_add host
config_foreach dhcp_mac_add mac
config_foreach dhcp_vendorclass_add vendorclass
config_foreach dhcp_userclass_add userclass
config_foreach dhcp_circuitid_add circuitid
config_foreach dhcp_remoteid_add remoteid
config_foreach dhcp_subscrid_add subscrid
config_foreach dhcp_add dhcp
/usr/sbin/dnsmasq $args && {
rm -f /tmp/resolv.conf
cat > /tmp/resolv.conf <<EOF
nameserver 127.0.0.1
search lan
EOF
}
}
stop() {
killall dnsmasq
}
|
