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 append_server() {
  40         append args "-S $1"
  41 }
  42
  43 append_interface() {
  44         append args "-i $1"
  45 }
  46
  47 append_notinterface() {
  48         append args "-I $1"
  49 }
  50
  51 dnsmasq() {
  52         local cfg="$1"
  53         append_bool "$cfg" authoritative "-K"
  54         append_bool "$cfg" nodaemon "-d"
  55         append_bool "$cfg" domainneeded "-D"
  56         append_bool "$cfg" filterwin2k "-f"
  57         append_bool "$cfg" nohosts "-h"
  58         append_bool "$cfg" nonegcache "-N"
  59         append_bool "$cfg" strictorder "-o"
  60         append_bool "$cfg" logqueries "-q"
  61         append_bool "$cfg" noresolv "-R"
  62         append_bool "$cfg" localise_queries "-y"
  63         append_bool "$cfg" readethers "-Z"
  64         append_bool "$cfg" dbus "-1"
  65         append_bool "$cfg" boguspriv "-b"
  66         append_bool "$cfg" expandhosts "-E"
  67         append_bool "$cfg" enable_tftp "--enable-tftp"
  68         append_bool "$cfg" nonwildcard "-z"
  69
  70         append_parm "$cfg" dnsforwardmax "-0"
  71         append_parm "$cfg" port "-p"
  72         append_parm "$cfg" ednspacket_max "-P"
  73         append_parm "$cfg" dhcpleasemax "-X"
  74         append_parm "$cfg" "addnhosts" "-H"
  75         append_parm "$cfg" "queryport" "-Q"
  76         append_parm "$cfg" "domain" "-s"
  77         append_parm "$cfg" "local" "-S"
  78         config_list_foreach "$cfg" "server" append_server
  79         config_list_foreach "$cfg" "interface" append_interface
  80         config_list_foreach "$cfg" "notinterface" append_notinterface
  81         append_parm "$cfg" "leasefile" "-l"
  82         append_parm "$cfg" "resolvfile" "-r"
  83         append_parm "$cfg" "tftp_root" "--tftp-root"
  84         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
  85
  86         config_get leasefile $cfg leasefile
  87         [ -e "$leasefile" ] || touch "$leasefile"
  88         config_get_bool cachelocal "$cfg" cachelocal 1
  89
  90         config_get hostsfile "$cfg" dhcphostsfile
  91         [ -e "$hostsfile" ] && append args "--dhcp-hostsfile=$hostsfile"
  92 }
  93
  94 dhcp_subscrid_add() {
  95         local cfg="$1"
  96
  97         config_get name "$cfg" name
  98         [ -n "$name" ] || return 0
  99
 100         config_get subscriberid "$cfg" subscriberid
 101         [ -n "$subscriberid" ] || return 0
 102
 103         append args "--dhcp-subscrid=$name,$subscriberid"
 104
 105         dhcp_option_add "$cfg" "$name"
 106 }
 107
 108 dhcp_remoteid_add() {
 109         local cfg="$1"
 110
 111         config_get name "$cfg" name
 112         [ -n "$name" ] || return 0
 113
 114         config_get remoteid "$cfg" remoteid
 115         [ -n "$remoteid" ] || return 0
 116
 117         append args "--dhcp-remoteid=$name,$remoteid"
 118
 119         dhcp_option_add "$cfg" "$name"
 120 }
 121
 122 dhcp_circuitid_add() {
 123         local cfg="$1"
 124
 125         config_get name "$cfg" name
 126         [ -n "$name" ] || return 0
 127
 128         config_get circuitid "$cfg" circuitid
 129         [ -n "$circuitid" ] || return 0
 130
 131         append args "--dhcp-circuitid=$name,$circuitid"
 132
 133         dhcp_option_add "$cfg" "$name"
 134 }
 135
 136 dhcp_userclass_add() {
 137         local cfg="$1"
 138
 139         config_get name "$cfg" name
 140         [ -n "$name" ] || return 0
 141
 142         config_get userclass "$cfg" userclass
 143         [ -n "$userclass" ] || return 0
 144
 145         append args "--dhcp-userclass=$name,$userclass"
 146
 147         dhcp_option_add "$cfg" "$name"
 148 }
 149
 150 dhcp_vendorclass_add() {
 151         local cfg="$1"
 152
 153         config_get name "$cfg" name
 154         [ -n "$name" ] || return 0
 155
 156         config_get vendorclass "$cfg" vendorclass
 157         [ -n "$vendorclass" ] || return 0
 158
 159         append args "--dhcp-vendorclass=$name,$vendorclass"
 160
 161         dhcp_option_add "$cfg" "$name"
 162 }
 163
 164 dhcp_host_add() {
 165         local cfg="$1"
 166
 167         config_get name "$cfg" name
 168         [ -n "$name" ] || return 0
 169
 170         config_get mac "$cfg" mac
 171         [ -n "$mac" ] || return 0
 172
 173         config_get ip "$cfg" ip
 174         [ -n "$ip" ] || return 0
 175
 176         append args "--dhcp-host=$mac,$ip"
 177
 178         dhcp_option_add "$cfg" "$name"
 179 }
 180
 181 dhcp_mac_add() {
 182         local cfg="$1"
 183
 184         config_get name "$cfg" name
 185         [ -n "$name" ] || return 0
 186
 187         config_get mac "$cfg" mac
 188         [ -n "$mac" ] || return 0
 189
 190         append args "--dhcp-mac=$name,$mac"
 191
 192         dhcp_option_add "$cfg" "$name"
 193 }
 194
 195 dhcp_boot_add() {
 196         local cfg="$1"
 197
 198         config_get name "$cfg" name
 199
 200         config_get filename "$cfg" filename
 201         [ -n "$filename" ] || return 0
 202
 203         config_get servername "$cfg" servername
 204         [ -n "$servername" ] || return 0
 205
 206         config_get serveraddress "$cfg" serveraddress
 207         [ -n "$serveraddress" ] || return 0
 208
 209         append args "--dhcp-boot=${name:+net:$name,}$filename,$servername,$serveraddress"
 210
 211         dhcp_option_add "$cfg" "$name"
 212 }
 213
 214
 215 dhcp_add() {
 216         local cfg="$1"
 217         config_get net "$cfg" interface
 218         [ -n "$net" ] || return 0
 219
 220         config_get name "$cfg" name
 221         [ -n "$name" ] || name="$net"
 222
 223         config_get ifname "$net" ifname
 224         [ -n "$ifname" ] || return 0
 225
 226         config_get dnsserver "$net" dns
 227         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
 228                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 229         }
 230
 231         append_bool "$cfg" ignore "-2 $ifname" && return 0
 232
 233         config_get proto "$net" proto
 234         [ static = "$proto" ] || return 0
 235
 236         config_get ipaddr "$net" ipaddr
 237         config_get netmask "$cfg" netmask
 238         [ -n "$netmask" ] || config_get netmask "$net" netmask
 239
 240         #check for an already active dhcp server on the interface, unless 'force' is set
 241         config_get_bool force "$cfg" force 0
 242         [ "$force" -gt 0 ] || {
 243                 udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && return 0
 244         }
 245
 246         config_get start "$cfg" start
 247         config_get limit "$cfg" limit
 248         config_get leasetime "$cfg" leasetime
 249         config_get options "$cfg" options
 250         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 251
 252         leasetime="${leasetime:-12h}"
 253         start="$(dhcp_calc "${start:-100}")"
 254         limit="$((${limit:-150} + 1))"
 255         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 256         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 257         append args "--dhcp-range=$name,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 258
 259         dhcp_option_add "$cfg" "$name"
 260 }
 261
 262 dhcp_option_add() {
 263         local cfg="$1"
 264         local name="$2"
 265
 266         config_get dhcp_option "$cfg" dhcp_option
 267         for o in $dhcp_option; do
 268                 append args "-O $name","$o"
 269         done
 270
 271 }
 272
 273 start() {
 274         include /lib/network
 275         scan_interfaces
 276         config_load dhcp
 277
 278         args=""
 279         config_foreach dnsmasq dnsmasq
 280         config_foreach dhcp_host_add host
 281         config_foreach dhcp_boot_add boot
 282         config_foreach dhcp_mac_add mac
 283         config_foreach dhcp_vendorclass_add vendorclass
 284         config_foreach dhcp_userclass_add userclass
 285         config_foreach dhcp_circuitid_add circuitid
 286         config_foreach dhcp_remoteid_add remoteid
 287         config_foreach dhcp_subscrid_add subscrid
 288         config_foreach dhcp_add dhcp
 289
 290         /usr/sbin/dnsmasq $args && {
 291                 rm -f /tmp/resolv.conf
 292                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 293                 for DNS_SERVER in $DNS_SERVERS ; do
 294                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 295                 done
 296         }
 297 }
 298
 299 stop() {
 300         [ -f /tmp/resolv.conf ] && {
 301                 rm -f /tmp/resolv.conf
 302                 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 303         }
 304         killall dnsmasq
 305         return 0
 306 }