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 "$cfg" expandhosts "-E"
  55         append_bool "$cfg" enable_tftp "--enable-tftp"
  56
  57         append_parm "$cfg" dnsforwardmax "-0"
  58         append_parm "$cfg" port "-p"
  59         append_parm "$cfg" ednspacket_max "-P"
  60         append_parm "$cfg" dhcpleasemax "-X"
  61         append_parm "$cfg" "addnhosts" "-H"
  62         append_parm "$cfg" "queryport" "-Q"
  63         append_parm "$cfg" "domain" "-s"
  64         append_parm "$cfg" "local" "-S"
  65         append_parm "$cfg" "leasefile" "-l"
  66         append_parm "$cfg" "resolvfile" "-r"
  67         append_parm "$cfg" "tftp_root" "--tftp-root"
  68         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
  69
  70         config_get leasefile $cfg leasefile
  71         [ -e "$leasefile" ] || touch "$leasefile"
  72         config_get_bool cachelocal "$cfg" cachelocal 1
  73 }
  74
  75 dhcp_subscrid_add() {
  76         local cfg="$1"
  77
  78         config_get name "$cfg" name
  79         [ -n "$name" ] || return 0
  80
  81         config_get subscriberid "$cfg" subscriberid
  82         [ -n "$subscriberid" ] || return 0
  83
  84         append args "--dhcp-subscrid=$name,$subscriberid"
  85
  86         dhcp_option_add "$cfg" "$name"
  87 }
  88
  89 dhcp_remoteid_add() {
  90         local cfg="$1"
  91
  92         config_get name "$cfg" name
  93         [ -n "$name" ] || return 0
  94
  95         config_get remoteid "$cfg" remoteid
  96         [ -n "$remoteid" ] || return 0
  97
  98         append args "--dhcp-remoteid=$name,$remoteid"
  99
 100         dhcp_option_add "$cfg" "$name"
 101 }
 102
 103 dhcp_circuitid_add() {
 104         local cfg="$1"
 105
 106         config_get name "$cfg" name
 107         [ -n "$name" ] || return 0
 108
 109         config_get circuitid "$cfg" circuitid
 110         [ -n "$circuitid" ] || return 0
 111
 112         append args "--dhcp-circuitid=$name,$circuitid"
 113
 114         dhcp_option_add "$cfg" "$name"
 115 }
 116
 117 dhcp_userclass_add() {
 118         local cfg="$1"
 119
 120         config_get name "$cfg" name
 121         [ -n "$name" ] || return 0
 122
 123         config_get userclass "$cfg" userclass
 124         [ -n "$userclass" ] || return 0
 125
 126         append args "--dhcp-userclass=$name,$userclass"
 127
 128         dhcp_option_add "$cfg" "$name"
 129 }
 130
 131 dhcp_vendorclass_add() {
 132         local cfg="$1"
 133
 134         config_get name "$cfg" name
 135         [ -n "$name" ] || return 0
 136
 137         config_get vendorclass "$cfg" vendorclass
 138         [ -n "$vendorclass" ] || return 0
 139
 140         append args "--dhcp-vendorclass=$name,$vendorclass"
 141
 142         dhcp_option_add "$cfg" "$name"
 143 }
 144
 145 dhcp_host_add() {
 146         local cfg="$1"
 147
 148         config_get name "$cfg" name
 149         [ -n "$name" ] || return 0
 150
 151         config_get mac "$cfg" mac
 152         [ -n "$mac" ] || return 0
 153
 154         config_get ip "$cfg" ip
 155         [ -n "$ip" ] || return 0
 156
 157         append args "--dhcp-host=$mac,$ip"
 158
 159         dhcp_option_add "$cfg" "$name"
 160 }
 161
 162 dhcp_mac_add() {
 163         local cfg="$1"
 164
 165         config_get name "$cfg" name
 166         [ -n "$name" ] || return 0
 167
 168         config_get mac "$cfg" mac
 169         [ -n "$mac" ] || return 0
 170
 171         append args "--dhcp-mac=$name,$mac"
 172
 173         dhcp_option_add "$cfg" "$name"
 174 }
 175
 176 dhcp_boot_add() {
 177         local cfg="$1"
 178
 179         config_get name "$cfg" name
 180         [ -n "$name" ] || return 0
 181
 182         config_get filename "$cfg" filename
 183         [ -n "$filename" ] || return 0
 184
 185         config_get servername "$cfg" servername
 186         [ -n "$servername" ] || return 0
 187
 188         config_get serveraddress "$cfg" serveraddress
 189         [ -n "$serveraddress" ] || return 0
 190
 191         append args "--dhcp-boot=net:$name,$filename,$servername,$serveraddress"
 192
 193         dhcp_option_add "$cfg" "$name"
 194 }
 195
 196
 197 dhcp_add() {
 198         local cfg="$1"
 199         config_get net "$cfg" interface
 200         [ -n "$net" ] || return 0
 201
 202         config_get name "$cfg" name
 203         [ -n "$name" ] || name="$net"
 204
 205         config_get ifname "$net" ifname
 206         [ -n "$ifname" ] || return 0
 207
 208         config_get dnsserver "$net" dns
 209         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
 210                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 211         }
 212
 213         append_bool "$cfg" ignore "-2 $ifname"
 214
 215         config_get proto "$net" proto
 216         [ static = "$proto" ] || return 0
 217
 218         config_get ipaddr "$net" ipaddr
 219         config_get netmask "$cfg" netmask
 220         [ -n "$netmask" ] || config_get netmask "$net" netmask
 221
 222         #check for an already active dhcp server on the interface, unless 'force' is set
 223         config_get_bool force "$cfg" force 0
 224         [ "$force" -gt 0 ] || {
 225                 udhcpc -n -q -R -s /bin/true -t 1 -i $ifname >&- && return 0
 226         }
 227
 228         config_get start "$cfg" start
 229         config_get limit "$cfg" limit
 230         config_get leasetime "$cfg" leasetime
 231         config_get options "$cfg" options
 232         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 233
 234         leasetime="${leasetime:-12h}"
 235         start="$(dhcp_calc "${start:-100}")"
 236         limit="$((${limit:-150} + 1))"
 237         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 238         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 239         append args "--dhcp-range=$name,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 240
 241         dhcp_option_add "$cfg" "$name"
 242 }
 243
 244 dhcp_option_add() {
 245         local cfg="$1"
 246         local name="$2"
 247
 248         config_get dhcp_option "$cfg" dhcp_option
 249         for o in $dhcp_option; do
 250                 append args "-O $name","$o"
 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         [ -f /tmp/resolv.conf ] && {
 283                 rm -f /tmp/resolv.conf
 284                 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 285         }
 286         killall dnsmasq
 287         return 0
 288 }