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="$3"
  24         local _loctmp
  25         config_get_bool _loctmp "$section" "$option"
  26         [ "$_loctmp" -gt 0 ] && append args "$3"
  27 }
  28
  29 append_parm() {
  30         local section="$1"
  31         local option="$2"
  32         local switch="$3"
  33         local _loctmp
  34         config_get _loctmp "$section" "$option"
  35         [ -z "$_loctmp" ] && return 0
  36         append args "$switch $_loctmp"
  37 }
  38
  39 dnsmasq() {
  40         local cfg="$1"
  41         append_bool "$cfg" authoritative "-K"
  42         append_bool "$cfg" nodaemon "-d"
  43         append_bool "$cfg" domainneeded "-D"
  44         append_bool "$cfg" filterwin2k "-f"
  45         append_bool "$cfg" nohosts "-h"
  46         append_bool "$cfg" nonegcache "-N"
  47         append_bool "$cfg" strictorder "-o"
  48         append_bool "$cfg" logqueries "-q"
  49         append_bool "$cfg" noresolv "-R"
  50         append_bool "$cfg" localise_queries "-y"
  51         append_bool "$cfg" readethers "-Z"
  52         append_bool "$cfg" dbus "-l"
  53
  54         append_parm "$cfg" dnsforwardmax "-0"
  55         append_parm "$cfg" port "-p"
  56         append_parm "$cfg" ednspacket_max "-P"
  57         append_parm "$cfg" dhcpleasemax "-X"
  58
  59         config_get addnhosts "$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         config_get dnsserver "$net" dns
 177         [ -n "$dnsserver" ] && {
 178                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 179         }
 180
 181         append_bool "$cfg" ignore "-I $ifname"
 182
 183         config_get proto "$net" proto
 184         [ static = "$proto" ] || return 0
 185
 186         config_get ipaddr "$net" ipaddr
 187         config_get netmask "$net" netmask
 188
 189         #check for an already active dhcp server on the interface, unless 'force' is set
 190         config_get_bool force "$cfg" force 0
 191         [ "$force" -gt 0 ] || {
 192                 udhcpc -n -q -R -s /bin/true -t 1 -i $ifname >&- && return 0
 193         }
 194
 195         config_get start "$cfg" start
 196         config_get limit "$cfg" limit
 197         config_get leasetime "$cfg" leasetime
 198         config_get options "$cfg" options
 199
 200         leasetime="${leasetime:-12h}"
 201         start="$(dhcp_calc "${start:-100}")"
 202         limit="$((${limit:-150} + 1))"
 203         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 204         append args "--dhcp-range=$name,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 205
 206         dhcp_option_add "$cfg" "$name"
 207 }
 208
 209 dhcp_option_add() {
 210         local cfg="$1"
 211         local name="$2"
 212
 213         for count in $(seq 0 100); do
 214                 eval current_value=\$CONFIG_"$cfg"_dhcp"$count"
 215                 if [ -z "$current_value" ]; then
 216                         let "count-=1"
 217                         break
 218                 fi
 219                 append args "-O $name","$current_value"
 220         done
 221
 222 }
 223
 224 start() {
 225         include /lib/network
 226         scan_interfaces
 227         config_load /var/state/network
 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 }