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 "$value"
  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 "$cfg" dbus "-l"
  53         append_bool "$cfg" boguspriv "-b"
  54         append_bool "$cfg" expandhosts "-E"
  55
  56         append_parm "$cfg" dnsforwardmax "-0"
  57         append_parm "$cfg" port "-p"
  58         append_parm "$cfg" ednspacket_max "-P"
  59         append_parm "$cfg" dhcpleasemax "-X"
  60         append_parm "$cfg" "addnhosts" "-H"
  61         append_parm "$cfg" "queryport" "-Q"
  62         append_parm "$cfg" "domain" "-s"
  63         append_parm "$cfg" "local" "-S"
  64         append_parm "$cfg" "leasefile" "-l"
  65         append_parm "$cfg" "resolvfile" "-r"
  66 }
  67
  68 dhcp_subscrid_add() {
  69         local cfg="$1"
  70
  71         config_get name "$cfg" name
  72         [ -n "$name" ] || return 0
  73
  74         config_get subscriberid "$cfg" subscriberid
  75         [ -n "$subscriberid" ] || return 0
  76
  77         append args "--dhcp-subscrid=$name,$subscriberid"
  78
  79         dhcp_option_add "$cfg" "$name"
  80 }
  81
  82 dhcp_remoteid_add() {
  83         local cfg="$1"
  84
  85         config_get name "$cfg" name
  86         [ -n "$name" ] || return 0
  87
  88         config_get remoteid "$cfg" remoteid
  89         [ -n "$remoteid" ] || return 0
  90
  91         append args "--dhcp-remoteid=$name,$remoteid"
  92
  93         dhcp_option_add "$cfg" "$name"
  94 }
  95
  96 dhcp_circuitid_add() {
  97         local cfg="$1"
  98
  99         config_get name "$cfg" name
 100         [ -n "$name" ] || return 0
 101
 102         config_get circuitid "$cfg" circuitid
 103         [ -n "$circuitid" ] || return 0
 104
 105         append args "--dhcp-circuitid=$name,$circuitid"
 106
 107         dhcp_option_add "$cfg" "$name"
 108 }
 109
 110 dhcp_userclass_add() {
 111         local cfg="$1"
 112
 113         config_get name "$cfg" name
 114         [ -n "$name" ] || return 0
 115
 116         config_get userclass "$cfg" userclass
 117         [ -n "$userclass" ] || return 0
 118
 119         append args "--dhcp-userclass=$name,$userclass"
 120
 121         dhcp_option_add "$cfg" "$name"
 122 }
 123
 124 dhcp_vendorclass_add() {
 125         local cfg="$1"
 126
 127         config_get name "$cfg" name
 128         [ -n "$name" ] || return 0
 129
 130         config_get vendorclass "$cfg" vendorclass
 131         [ -n "$vendorclass" ] || return 0
 132
 133         append args "--dhcp-vendorclass=$name,$vendorclass"
 134
 135         dhcp_option_add "$cfg" "$name"
 136 }
 137
 138 dhcp_host_add() {
 139         local cfg="$1"
 140
 141         config_get name "$cfg" name
 142         [ -n "$name" ] || return 0
 143
 144         config_get mac "$cfg" mac
 145         [ -n "$mac" ] || return 0
 146
 147         config_get ip "$cfg" ip
 148         [ -n "$ip" ] || return 0
 149
 150         append args "--dhcp-host=$mac,$ip"
 151
 152         dhcp_option_add "$cfg" "$name"
 153 }
 154
 155 dhcp_mac_add() {
 156         local cfg="$1"
 157
 158         config_get name "$cfg" name
 159         [ -n "$name" ] || return 0
 160
 161         config_get mac "$cfg" mac
 162         [ -n "$mac" ] || return 0
 163
 164         append args "--dhcp-mac=$name,$mac"
 165
 166         dhcp_option_add "$cfg" "$name"
 167 }
 168
 169 dhcp_add() {
 170         local cfg="$1"
 171         config_get net "$cfg" interface
 172         [ -n "$net" ] || return 0
 173
 174         config_get name "$cfg" name
 175         [ -n "$name" ] || name="$net"
 176
 177         config_get ifname "$net" ifname
 178         [ -n "$ifname" ] || return 0
 179
 180         config_get dnsserver "$net" dns
 181         [ -n "$dnsserver" ] && {
 182                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 183         }
 184
 185         append_bool "$cfg" ignore "-I $ifname"
 186
 187         config_get proto "$net" proto
 188         [ static = "$proto" ] || return 0
 189
 190         config_get ipaddr "$net" ipaddr
 191         config_get netmask "$cfg" netmask
 192         [ -n "$netmask" ] || config_get netmask "$net" netmask
 193
 194         #check for an already active dhcp server on the interface, unless 'force' is set
 195         config_get_bool force "$cfg" force 0
 196         [ "$force" -gt 0 ] || {
 197                 udhcpc -n -q -R -s /bin/true -t 1 -i $ifname >&- && return 0
 198         }
 199
 200         config_get start "$cfg" start
 201         config_get limit "$cfg" limit
 202         config_get leasetime "$cfg" leasetime
 203         config_get options "$cfg" options
 204         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 205
 206         leasetime="${leasetime:-12h}"
 207         start="$(dhcp_calc "${start:-100}")"
 208         limit="$((${limit:-150} + 1))"
 209         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 210         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 211         append args "--dhcp-range=$name,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 212
 213         dhcp_option_add "$cfg" "$name"
 214 }
 215
 216 dhcp_option_add() {
 217         local cfg="$1"
 218         local name="$2"
 219
 220         for count in $(seq 0 100); do
 221                 eval current_value=\$CONFIG_"$cfg"_dhcp"$count"
 222                 if [ -z "$current_value" ]; then
 223                         let "count-=1"
 224                         break
 225                 fi
 226                 append args "-O $name","$current_value"
 227         done
 228
 229 }
 230
 231 start() {
 232         include /lib/network
 233         scan_interfaces
 234         config_load /var/state/network
 235         config_load dhcp
 236
 237         args=""
 238         config_foreach dnsmasq dnsmasq
 239         config_foreach dhcp_host_add host
 240         config_foreach dhcp_mac_add mac
 241         config_foreach dhcp_vendorclass_add vendorclass
 242         config_foreach dhcp_userclass_add userclass
 243         config_foreach dhcp_circuitid_add circuitid
 244         config_foreach dhcp_remoteid_add remoteid
 245         config_foreach dhcp_subscrid_add subscrid
 246         config_foreach dhcp_add dhcp
 247
 248         /usr/sbin/dnsmasq $args && {
 249                 rm -f /tmp/resolv.conf
 250                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 251                 for DNS_SERVER in $DNS_SERVERS ; do
 252                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 253                 done
 254         }
 255 }
 256
 257 stop() {
 258         killall dnsmasq
 259 }