package/dnsmasq/files/dnsmasq.init

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