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 DOMAIN=""
   7
   8 dhcp_calc() {
   9         local ip="$1"
  10         local res=0
  11
  12         while [ -n "$ip" ]; do
  13                 part="${ip%%.*}"
  14                 res="$(($res * 256))"
  15                 res="$(($res + $part))"
  16                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
  17         done
  18         echo "$res"
  19 }
  20
  21 append_bool() {
  22         local section="$1"
  23         local option="$2"
  24         local value="$3"
  25         local _loctmp
  26         config_get_bool _loctmp "$section" "$option" 0
  27         [ $_loctmp -gt 0 ] && append args "$value"
  28 }
  29
  30 append_parm() {
  31         local section="$1"
  32         local option="$2"
  33         local switch="$3"
  34         local _loctmp
  35         config_get _loctmp "$section" "$option"
  36         [ -z "$_loctmp" ] && return 0
  37         append args "$switch $_loctmp"
  38 }
  39
  40 append_server() {
  41         append args "-S $1"
  42 }
  43
  44 append_interface() {
  45         local ifname=$(uci_get_state network "$1" ifname "$1")
  46         append args "-i $ifname"
  47 }
  48
  49 append_notinterface() {
  50         local ifname=$(uci_get_state network "$1" ifname "$1")
  51         append args "-I $ifname"
  52 }
  53
  54 append_addnhosts() {
  55         append args "-H $1"
  56 }
  57
  58 append_bogusnxdomain() {
  59        append args "-B $1"
  60 }
  61
  62 dnsmasq() {
  63         local cfg="$1"
  64         append_bool "$cfg" authoritative "-K"
  65         append_bool "$cfg" nodaemon "-d"
  66         append_bool "$cfg" domainneeded "-D"
  67         append_bool "$cfg" filterwin2k "-f"
  68         append_bool "$cfg" nohosts "-h"
  69         append_bool "$cfg" nonegcache "-N"
  70         append_bool "$cfg" strictorder "-o"
  71         append_bool "$cfg" logqueries "-q"
  72         append_bool "$cfg" noresolv "-R"
  73         append_bool "$cfg" localise_queries "-y"
  74         append_bool "$cfg" readethers "-Z"
  75         append_bool "$cfg" dbus "-1"
  76         append_bool "$cfg" boguspriv "-b"
  77         append_bool "$cfg" expandhosts "-E"
  78         append_bool "$cfg" enable_tftp "--enable-tftp"
  79         append_bool "$cfg" nonwildcard "-z"
  80
  81         append_parm "$cfg" cachesize "-c"
  82         append_parm "$cfg" dnsforwardmax "-0"
  83         append_parm "$cfg" port "-p"
  84         append_parm "$cfg" ednspacket_max "-P"
  85         append_parm "$cfg" dhcpleasemax "-X"
  86         append_parm "$cfg" "queryport" "-Q"
  87         append_parm "$cfg" "domain" "-s"
  88         append_parm "$cfg" "local" "-S"
  89         config_list_foreach "$cfg" "server" append_server
  90         config_list_foreach "$cfg" "interface" append_interface
  91         config_list_foreach "$cfg" "notinterface" append_notinterface
  92         config_list_foreach "$cfg" "addnhosts" append_addnhosts
  93         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
  94         append_parm "$cfg" "leasefile" "-l"
  95         append_parm "$cfg" "resolvfile" "-r"
  96         append_parm "$cfg" "tftp_root" "--tftp-root"
  97         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
  98
  99         config_get DOMAIN "$cfg" domain
 100
 101         config_get_bool readethers "$cfg" readethers
 102         [ "$readethers" = "1" ] && [ -e "/etc/ethers" ] || touch /etc/ethers
 103
 104         config_get leasefile $cfg leasefile
 105         [ -n "$leasefile" ] && [ -e "$leasefile" ] || touch "$leasefile"
 106         config_get_bool cachelocal "$cfg" cachelocal 1
 107
 108         config_get hostsfile "$cfg" dhcphostsfile
 109         [ -e "$hostsfile" ] && append args "--dhcp-hostsfile=$hostsfile"
 110
 111         local rebind
 112         config_get_bool rebind "$cfg" rebind_protection 1
 113         [ $rebind -gt 0 ] && {
 114                 logger -t dnsmasq \
 115                         "DNS rebinding protection is active," \
 116                         "will discard upstream RFC1918 responses!"
 117                 append args "--stop-dns-rebind"
 118
 119                 local rebind_localhost
 120                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 121                 [ $rebind_localhost -gt 0 ] && {
 122                         logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
 123                         append args "--rebind-localhost-ok"
 124                 }
 125
 126                 append_rebind_domain() {
 127                         logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
 128                         append args "--rebind-domain-ok=$1"
 129                 }
 130
 131                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 132         }
 133 }
 134
 135 dhcp_subscrid_add() {
 136         local cfg="$1"
 137
 138         config_get networkid "$cfg" networkid
 139         [ -n "$networkid" ] || return 0
 140
 141         config_get subscriberid "$cfg" subscriberid
 142         [ -n "$subscriberid" ] || return 0
 143
 144         append args "--dhcp-subscrid=$networkid,$subscriberid"
 145
 146         dhcp_option_add "$cfg" "$networkid"
 147 }
 148
 149 dhcp_remoteid_add() {
 150         local cfg="$1"
 151
 152         config_get networkid "$cfg" networkid
 153         [ -n "$networkid" ] || return 0
 154
 155         config_get remoteid "$cfg" remoteid
 156         [ -n "$remoteid" ] || return 0
 157
 158         append args "--dhcp-remoteid=$networkid,$remoteid"
 159
 160         dhcp_option_add "$cfg" "$networkid"
 161 }
 162
 163 dhcp_circuitid_add() {
 164         local cfg="$1"
 165
 166         config_get networkid "$cfg" networkid
 167         [ -n "$networkid" ] || return 0
 168
 169         config_get circuitid "$cfg" circuitid
 170         [ -n "$circuitid" ] || return 0
 171
 172         append args "--dhcp-circuitid=$networkid,$circuitid"
 173
 174         dhcp_option_add "$cfg" "$networkid"
 175 }
 176
 177 dhcp_userclass_add() {
 178         local cfg="$1"
 179
 180         config_get networkid "$cfg" networkid
 181         [ -n "$networkid" ] || return 0
 182
 183         config_get userclass "$cfg" userclass
 184         [ -n "$userclass" ] || return 0
 185
 186         append args "--dhcp-userclass=$networkid,$userclass"
 187
 188         dhcp_option_add "$cfg" "$networkid"
 189 }
 190
 191 dhcp_vendorclass_add() {
 192         local cfg="$1"
 193
 194         config_get networkid "$cfg" networkid
 195         [ -n "$networkid" ] || return 0
 196
 197         config_get vendorclass "$cfg" vendorclass
 198         [ -n "$vendorclass" ] || return 0
 199
 200         append args "--dhcp-vendorclass=$networkid,$vendorclass"
 201
 202         dhcp_option_add "$cfg" "$networkid"
 203 }
 204
 205 dhcp_host_add() {
 206         local cfg="$1"
 207
 208         config_get name "$cfg" name
 209
 210         config_get networkid "$cfg" networkid
 211         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid"
 212
 213         config_get ip "$cfg" ip
 214         [ -n "$ip" ] || return 0
 215
 216         macs=""
 217         config_get mac "$cfg" mac
 218         for m in $mac; do append macs "$m" ","; done
 219         [ -n "$macs" ] || return 0
 220
 221         append args "--dhcp-host=$macs,${networkid:+net:$networkid,}$ip${name:+,$name}"
 222 }
 223
 224 dhcp_mac_add() {
 225         local cfg="$1"
 226
 227         config_get networkid "$cfg" networkid
 228         [ -n "$networkid" ] || return 0
 229
 230         config_get mac "$cfg" mac
 231         [ -n "$mac" ] || return 0
 232
 233         append args "--dhcp-mac=$networkid,$mac"
 234
 235         dhcp_option_add "$cfg" "$networkid"
 236 }
 237
 238 dhcp_boot_add() {
 239         local cfg="$1"
 240
 241         config_get networkid "$cfg" networkid
 242
 243         config_get filename "$cfg" filename
 244         [ -n "$filename" ] || return 0
 245
 246         config_get servername "$cfg" servername
 247         [ -n "$servername" ] || return 0
 248
 249         config_get serveraddress "$cfg" serveraddress
 250         [ -n "$serveraddress" ] || return 0
 251
 252         append args "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
 253
 254         dhcp_option_add "$cfg" "$networkid"
 255 }
 256
 257
 258 dhcp_add() {
 259         local cfg="$1"
 260         config_get net "$cfg" interface
 261         [ -n "$net" ] || return 0
 262
 263         config_get networkid "$cfg" networkid
 264         [ -n "$networkid" ] || networkid="$net"
 265
 266         config_get ifname "$net" ifname
 267         [ -n "$ifname" ] || return 0
 268
 269         config_get dnsserver "$net" dns
 270         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
 271                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 272         }
 273
 274         append_bool "$cfg" ignore "-2 $ifname" && return 0
 275
 276         config_get proto "$net" proto
 277         [ static = "$proto" ] || return 0
 278
 279         config_get ipaddr "$net" ipaddr
 280         config_get netmask "$cfg" netmask
 281         [ -n "$netmask" ] || config_get netmask "$net" netmask
 282
 283         #check for an already active dhcp server on the interface, unless 'force' is set
 284         config_get_bool force "$cfg" force 0
 285         [ $force -gt 0 ] || {
 286                 udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && {
 287                         logger -t dnsmasq \
 288                                 "found already running DHCP-server on interface '$ifname'" \
 289                                 "refusing to start, use 'option force 1' to override"
 290                         return 0
 291                 }
 292         }
 293
 294         config_get start "$cfg" start
 295         config_get limit "$cfg" limit
 296         config_get leasetime "$cfg" leasetime
 297         config_get options "$cfg" options
 298         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 299
 300         leasetime="${leasetime:-12h}"
 301         start="$(dhcp_calc "${start:-100}")"
 302         limit="${limit:-150}"
 303         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 304         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 305         append args "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 306
 307         dhcp_option_add "$cfg" "$networkid"
 308 }
 309
 310 dhcp_option_add() {
 311         local cfg="$1"
 312         local networkid="$2"
 313
 314         config_get dhcp_option "$cfg" dhcp_option
 315         for o in $dhcp_option; do
 316                 append args "-O $networkid","$o"
 317         done
 318
 319 }
 320
 321 dhcp_domain_add() {
 322         local cfg="$1"
 323         local ip name names
 324
 325         config_get names "$cfg" name
 326         [ -n "$names" ] || return 0
 327
 328         config_get ip "$cfg" ip
 329         [ -n "$ip" ] || return 0
 330
 331         local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
 332         local raddr="${4:+$4.$3.$2.$1.in-addr.arpa}"
 333
 334         for name in $names; do
 335                 local fqdn="$name"
 336
 337                 [ "${fqdn%.*}" == "$fqdn" ] && \
 338                         fqdn="$fqdn${DOMAIN:+.$DOMAIN}"
 339
 340                 append args "-A /$fqdn/$ip"
 341
 342                 [ -n "$raddr" ] && {
 343                         append args "--ptr-record=$raddr,$fqdn"
 344                         raddr=""
 345                 }
 346         done
 347 }
 348
 349 dhcp_srv_add() {
 350         local cfg="$1"
 351
 352         config_get srv "$cfg" srv
 353         [ -n "$srv" ] || return 0
 354
 355         config_get target "$cfg" target
 356         [ -n "$target" ] || return 0
 357
 358         config_get port "$cfg" port
 359
 360         local service="$srv,$target"
 361         [ -n "$port" ] && service="$service,$port"
 362
 363         append args "-W $service"
 364 }
 365
 366 start() {
 367         include /lib/network
 368         scan_interfaces
 369         config_load dhcp
 370
 371         args=""
 372         config_foreach dnsmasq dnsmasq
 373         config_foreach dhcp_host_add host
 374         config_foreach dhcp_boot_add boot
 375         config_foreach dhcp_mac_add mac
 376         config_foreach dhcp_vendorclass_add vendorclass
 377         config_foreach dhcp_userclass_add userclass
 378         config_foreach dhcp_circuitid_add circuitid
 379         config_foreach dhcp_remoteid_add remoteid
 380         config_foreach dhcp_subscrid_add subscrid
 381         config_foreach dhcp_domain_add domain
 382         config_foreach dhcp_srv_add srvhost
 383         config_foreach dhcp_add dhcp
 384
 385         /usr/sbin/dnsmasq $args && {
 386                 rm -f /tmp/resolv.conf
 387                 [ -n "$DOMAIN" ] && echo "search $DOMAIN" >> /tmp/resolv.conf
 388                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 389                 for DNS_SERVER in $DNS_SERVERS ; do
 390                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 391                 done
 392         }
 393 }
 394
 395 stop() {
 396         [ -f /tmp/resolv.conf ] && {
 397                 rm -f /tmp/resolv.conf
 398                 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 399         }
 400         killall dnsmasq
 401         return 0
 402 }