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 "$cfg" dbus "-1"
  53         append_bool "$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         config_get leasefile $cfg leasefile
  68         [ -e "$leasefile" ] || touch "$leasefile"
  69 }
  70
  71 dhcp_subscrid_add() {
  72         local cfg="$1"
  73
  74         config_get name "$cfg" name
  75         [ -n "$name" ] || return 0
  76
  77         config_get subscriberid "$cfg" subscriberid
  78         [ -n "$subscriberid" ] || return 0
  79
  80         append args "--dhcp-subscrid=$name,$subscriberid"
  81
  82         dhcp_option_add "$cfg" "$name"
  83 }
  84
  85 dhcp_remoteid_add() {
  86         local cfg="$1"
  87
  88         config_get name "$cfg" name
  89         [ -n "$name" ] || return 0
  90
  91         config_get remoteid "$cfg" remoteid
  92         [ -n "$remoteid" ] || return 0
  93
  94         append args "--dhcp-remoteid=$name,$remoteid"
  95
  96         dhcp_option_add "$cfg" "$name"
  97 }
  98
  99 dhcp_circuitid_add() {
 100         local cfg="$1"
 101
 102         config_get name "$cfg" name
 103         [ -n "$name" ] || return 0
 104
 105         config_get circuitid "$cfg" circuitid
 106         [ -n "$circuitid" ] || return 0
 107
 108         append args "--dhcp-circuitid=$name,$circuitid"
 109
 110         dhcp_option_add "$cfg" "$name"
 111 }
 112
 113 dhcp_userclass_add() {
 114         local cfg="$1"
 115
 116         config_get name "$cfg" name
 117         [ -n "$name" ] || return 0
 118
 119         config_get userclass "$cfg" userclass
 120         [ -n "$userclass" ] || return 0
 121
 122         append args "--dhcp-userclass=$name,$userclass"
 123
 124         dhcp_option_add "$cfg" "$name"
 125 }
 126
 127 dhcp_vendorclass_add() {
 128         local cfg="$1"
 129
 130         config_get name "$cfg" name
 131         [ -n "$name" ] || return 0
 132
 133         config_get vendorclass "$cfg" vendorclass
 134         [ -n "$vendorclass" ] || return 0
 135
 136         append args "--dhcp-vendorclass=$name,$vendorclass"
 137
 138         dhcp_option_add "$cfg" "$name"
 139 }
 140
 141 dhcp_host_add() {
 142         local cfg="$1"
 143
 144         config_get name "$cfg" name
 145         [ -n "$name" ] || return 0
 146
 147         config_get mac "$cfg" mac
 148         [ -n "$mac" ] || return 0
 149
 150         config_get ip "$cfg" ip
 151         [ -n "$ip" ] || return 0
 152
 153         append args "--dhcp-host=$mac,$ip"
 154
 155         dhcp_option_add "$cfg" "$name"
 156 }
 157
 158 dhcp_mac_add() {
 159         local cfg="$1"
 160
 161         config_get name "$cfg" name
 162         [ -n "$name" ] || return 0
 163
 164         config_get mac "$cfg" mac
 165         [ -n "$mac" ] || return 0
 166
 167         append args "--dhcp-mac=$name,$mac"
 168
 169         dhcp_option_add "$cfg" "$name"
 170 }
 171
 172 dhcp_boot_add() {
 173         local cfg="$1"
 174
 175         config_get name "$cfg" name
 176         [ -n "$name" ] || return 0
 177
 178         config_get filename "$cfg" filename
 179         [ -n "$filename" ] || return 0
 180
 181         config_get servername "$cfg" servername
 182         [ -n "$servername" ] || return 0
 183
 184         config_get serveraddress "$cfg" serveraddress
 185         [ -n "$serveraddress" ] || return 0
 186
 187         append args "--dhcp-boot=net:$name,$filename,$servername,$serveraddress"
 188
 189         dhcp_option_add "$cfg" "$name"
 190 }
 191
 192
 193 dhcp_add() {
 194         local cfg="$1"
 195         config_get net "$cfg" interface
 196         [ -n "$net" ] || return 0
 197
 198         config_get name "$cfg" name
 199         [ -n "$name" ] || name="$net"
 200
 201         config_get ifname "$net" ifname
 202         [ -n "$ifname" ] || return 0
 203
 204         config_get dnsserver "$net" dns
 205         [ -n "$dnsserver" ] && {
 206                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 207         }
 208
 209         append_bool "$cfg" ignore "-2 $ifname"
 210
 211         config_get proto "$net" proto
 212         [ static = "$proto" ] || return 0
 213
 214         config_get ipaddr "$net" ipaddr
 215         config_get netmask "$cfg" netmask
 216         [ -n "$netmask" ] || config_get netmask "$net" netmask
 217
 218         #check for an already active dhcp server on the interface, unless 'force' is set
 219         config_get_bool force "$cfg" force 0
 220         [ "$force" -gt 0 ] || {
 221                 udhcpc -n -q -R -s /bin/true -t 1 -i $ifname >&- && return 0
 222         }
 223
 224         config_get start "$cfg" start
 225         config_get limit "$cfg" limit
 226         config_get leasetime "$cfg" leasetime
 227         config_get options "$cfg" options
 228         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 229
 230         leasetime="${leasetime:-12h}"
 231         start="$(dhcp_calc "${start:-100}")"
 232         limit="$((${limit:-150} + 1))"
 233         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 234         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 235         append args "--dhcp-range=$name,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 236
 237         dhcp_option_add "$cfg" "$name"
 238 }
 239
 240 dhcp_option_add() {
 241         local cfg="$1"
 242         local name="$2"
 243
 244         for count in $(seq 0 100); do
 245                 eval current_value=\$CONFIG_"$cfg"_dhcp"$count"
 246                 if [ -z "$current_value" ]; then
 247                         let "count-=1"
 248                         break
 249                 fi
 250                 append args "-O $name","$current_value"
 251         done
 252
 253 }
 254
 255 start() {
 256         include /lib/network
 257         scan_interfaces
 258         config_load dhcp
 259
 260         args=""
 261         config_foreach dnsmasq dnsmasq
 262         config_foreach dhcp_host_add host
 263         config_foreach dhcp_boot_add boot
 264         config_foreach dhcp_mac_add mac
 265         config_foreach dhcp_vendorclass_add vendorclass
 266         config_foreach dhcp_userclass_add userclass
 267         config_foreach dhcp_circuitid_add circuitid
 268         config_foreach dhcp_remoteid_add remoteid
 269         config_foreach dhcp_subscrid_add subscrid
 270         config_foreach dhcp_add dhcp
 271
 272         /usr/sbin/dnsmasq $args && {
 273                 rm -f /tmp/resolv.conf
 274                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 275                 for DNS_SERVER in $DNS_SERVERS ; do
 276                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 277                 done
 278         }
 279 }
 280
 281 stop() {
 282         killall dnsmasq
 283 }