package/dnsmasq/files/dnsmasq.init

   1 #!/bin/sh /etc/rc.common
   2 # Copyright (C) 2007 OpenWrt.org
   3
   4 START=60
   5 DNS_SERVERS=""
   6
   7 dhcp_calc() {
   8         local ip="$1"
   9         local res=0
  10
  11         while [ -n "$ip" ]; do
  12                 part="${ip%%.*}"
  13                 res="$(($res * 256))"
  14                 res="$(($res + $part))"
  15                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
  16         done
  17         echo "$res"
  18 }
  19
  20 append_bool() {
  21         local section="$1"
  22         local option="$2"
  23         local value="$3"
  24         local _tmp
  25         config_get_bool _tmp "$section" "$option"
  26         [ "$_tmp" -gt 0 ] && append args "$3"
  27 }
  28
  29 dnsmasq() {
  30         local cfg="$1"
  31         append_bool "$cfg" authoritative "-K"
  32         append_bool "$cfg" nodaemon "-d"
  33         append_bool "$cfg" domainneeded "-D"
  34         append_bool "$cfg" filterwin2k "-f"
  35         append_bool "$cfg" nohosts "-h"
  36         append_bool "$cfg" nonegcache "-N"
  37         append_bool "$cfg" strictorder "-o"
  38         append_bool "$cfg" logqueries "-q"
  39         append_bool "$cfg" noresolv "-R"
  40         append_bool "$cfg" localise_queries "-y"
  41         append_bool "$cfg" readethers "-Z"
  42         append_bool "$cfg" dbus "-l"
  43
  44         config_get dnsforwardmax "$cfg" dnsforwardmax
  45         dnsforwardmax="${dnsforwardmax:-150}"
  46         append args "-0 $dnsforwardmax"
  47
  48         config_get port "$cfg" port
  49         port="${port:-53}"
  50         append args "-p $port"
  51
  52         config_get ednspacket_max "$cfg" ednspacket_max
  53         ednspacket_max="${ednspacket_max:-1280}"
  54         append args "-P $ednspacket_max"
  55
  56         config_get dhcpleasemax "$cfg" dhcpleasemax
  57         dhcpleasemax="${dhcpleasemax:-150}"
  58         append args "-X $dhcpleasemax"
  59
  60         config_get addnhosts "$cfg" addnhosts
  61         config_get interface "$cfg" interface
  62         config_get exceptinterface "$cfg" exceptinterface
  63         config_get queryport "$cfg" queryport
  64         config_get domain "$cfg" domain
  65 }
  66
  67 dhcp_subscrid_add() {
  68         local cfg="$1"
  69
  70         config_get name "$cfg" name
  71         [ -n "$name" ] || return 0
  72
  73         config_get subscriberid "$cfg" subscriberid
  74         [ -n "$subscriberid" ] || return 0
  75
  76         append args "--dhcp-subscrid=$name,$subscriberid"
  77
  78         dhcp_option_add "$cfg" "$name"
  79 }
  80
  81 dhcp_remoteid_add() {
  82         local cfg="$1"
  83
  84         config_get name "$cfg" name
  85         [ -n "$name" ] || return 0
  86
  87         config_get remoteid "$cfg" remoteid
  88         [ -n "$remoteid" ] || return 0
  89
  90         append args "--dhcp-remoteid=$name,$remoteid"
  91
  92         dhcp_option_add "$cfg" "$name"
  93 }
  94
  95 dhcp_circuitid_add() {
  96         local cfg="$1"
  97
  98         config_get name "$cfg" name
  99         [ -n "$name" ] || return 0
 100
 101         config_get circuitid "$cfg" circuitid
 102         [ -n "$circuitid" ] || return 0
 103
 104         append args "--dhcp-circuitid=$name,$circuitid"
 105
 106         dhcp_option_add "$cfg" "$name"
 107 }
 108
 109 dhcp_userclass_add() {
 110         local cfg="$1"
 111
 112         config_get name "$cfg" name
 113         [ -n "$name" ] || return 0
 114
 115         config_get userclass "$cfg" userclass
 116         [ -n "$userclass" ] || return 0
 117
 118         append args "--dhcp-userclass=$name,$userclass"
 119
 120         dhcp_option_add "$cfg" "$name"
 121 }
 122
 123 dhcp_vendorclass_add() {
 124         local cfg="$1"
 125
 126         config_get name "$cfg" name
 127         [ -n "$name" ] || return 0
 128
 129         config_get vendorclass "$cfg" vendorclass
 130         [ -n "$vendorclass" ] || return 0
 131
 132         append args "--dhcp-vendorclass=$name,$vendorclass"
 133
 134         dhcp_option_add "$cfg" "$name"
 135 }
 136
 137 dhcp_host_add() {
 138         local cfg="$1"
 139
 140         config_get name "$cfg" name
 141         [ -n "$name" ] || return 0
 142
 143         config_get mac "$cfg" mac
 144         [ -n "$mac" ] || return 0
 145
 146
 147         append args "--dhcp-host=$mac,$ip"
 148
 149         dhcp_option_add "$cfg" "$name"
 150 }
 151
 152 dhcp_mac_add() {
 153         local cfg="$1"
 154
 155         config_get name "$cfg" name
 156         [ -n "$name" ] || return 0
 157
 158         config_get mac "$cfg" mac
 159         [ -n "$mac" ] || return 0
 160
 161         append args "--dhcp-mac=$name,$mac"
 162
 163         dhcp_option_add "$cfg" "$name"
 164 }
 165
 166 dhcp_add() {
 167         local cfg="$1"
 168         config_get net "$cfg" interface
 169         [ -n "$net" ] || return 0
 170
 171         config_get name "$cfg" name
 172         [ -n "$name" ] || name="$net"
 173
 174         config_get ifname "$net" ifname
 175         [ -n "$ifname" ] || return 0
 176
 177         config_get dnsserver "$net" dns
 178         [ -n "$dnsserver" ] && {
 179                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 180         }
 181
 182         append_bool "$cfg" ignore "-I $ifname"
 183
 184         config_get proto "$net" proto
 185         [ static = "$proto" ] || return 0
 186
 187         config_get ipaddr "$net" ipaddr
 188         config_get netmask "$net" netmask
 189
 190         #check for an already active dhcp server on the interface, unless 'force' is set
 191         config_get_bool force "$cfg" force 0
 192         [ "$force" -gt 0 ] || {
 193                 udhcpc -n -q -R -s /bin/true -t 1 -i $ifname >&- && return 0
 194         }
 195
 196         config_get start "$cfg" start
 197         config_get limit "$cfg" limit
 198         config_get leasetime "$cfg" leasetime
 199         config_get options "$cfg" options
 200
 201         leasetime="${leasetime:-12h}"
 202         start="$(dhcp_calc "${start:-100}")"
 203         limit="$((${limit:-150} + 1))"
 204         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 205         append args "--dhcp-range=$name,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 206
 207         dhcp_option_add "$cfg" "$name"
 208 }
 209
 210 dhcp_option_add () {
 211         local cfg="$1"
 212         local name="$2"
 213
 214         for count in $(seq 0 100); do
 215                 eval current_value=\$CONFIG_"$cfg"_dhcp"$count"
 216                 if [ -z "$current_value" ]; then
 217                         let "count-=1"
 218                         break
 219                 fi
 220                 append args "-O $name","$current_value"
 221         done
 222
 223 }
 224
 225 start() {
 226         include /lib/network
 227         scan_interfaces
 228         config_load dhcp
 229
 230         args=""
 231         config_foreach dnsmasq dnsmasq
 232         config_foreach dhcp_host_add host
 233         config_foreach dhcp_mac_add mac
 234         config_foreach dhcp_vendorclass_add vendorclass
 235         config_foreach dhcp_userclass_add userclass
 236         config_foreach dhcp_circuitid_add circuitid
 237         config_foreach dhcp_remoteid_add remoteid
 238         config_foreach dhcp_subscrid_add subscrid
 239         config_foreach dhcp_add dhcp
 240
 241         /usr/sbin/dnsmasq $args && {
 242                 rm -f /tmp/resolv.conf
 243                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 244                 for DNS_SERVER in $DNS_SERVERS ; do
 245                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 246                 done
 247         }
 248 }
 249
 250 stop() {
 251         killall dnsmasq
 252 }