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