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" dhcpscript "-6"
  82         append_parm "$cfg" cachesize "-c"
  83         append_parm "$cfg" dnsforwardmax "-0"
  84         append_parm "$cfg" port "-p"
  85         append_parm "$cfg" ednspacket_max "-P"
  86         append_parm "$cfg" dhcpleasemax "-X"
  87         append_parm "$cfg" "queryport" "-Q"
  88         append_parm "$cfg" "domain" "-s"
  89         append_parm "$cfg" "local" "-S"
  90         config_list_foreach "$cfg" "server" append_server
  91         config_list_foreach "$cfg" "interface" append_interface
  92         config_list_foreach "$cfg" "notinterface" append_notinterface
  93         config_list_foreach "$cfg" "addnhosts" append_addnhosts
  94         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
  95         append_parm "$cfg" "leasefile" "-l"
  96         append_parm "$cfg" "resolvfile" "-r"
  97         append_parm "$cfg" "tftp_root" "--tftp-root"
  98         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
  99
 100         config_get DOMAIN "$cfg" domain
 101
 102         config_get_bool readethers "$cfg" readethers
 103         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 104
 105         config_get leasefile $cfg leasefile
 106         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 107         config_get_bool cachelocal "$cfg" cachelocal 1
 108
 109         config_get hostsfile "$cfg" dhcphostsfile
 110         [ -e "$hostsfile" ] && append args "--dhcp-hostsfile=$hostsfile"
 111
 112         local rebind
 113         config_get_bool rebind "$cfg" rebind_protection 1
 114         [ $rebind -gt 0 ] && {
 115                 logger -t dnsmasq \
 116                         "DNS rebinding protection is active," \
 117                         "will discard upstream RFC1918 responses!"
 118                 append args "--stop-dns-rebind"
 119
 120                 local rebind_localhost
 121                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 122                 [ $rebind_localhost -gt 0 ] && {
 123                         logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
 124                         append args "--rebind-localhost-ok"
 125                 }
 126
 127                 append_rebind_domain() {
 128                         logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
 129                         append args "--rebind-domain-ok=$1"
 130                 }
 131
 132                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 133         }
 134 }
 135
 136 dhcp_subscrid_add() {
 137         local cfg="$1"
 138
 139         config_get networkid "$cfg" networkid
 140         [ -n "$networkid" ] || return 0
 141
 142         config_get subscriberid "$cfg" subscriberid
 143         [ -n "$subscriberid" ] || return 0
 144
 145         append args "--dhcp-subscrid=$networkid,$subscriberid"
 146
 147         dhcp_option_add "$cfg" "$networkid"
 148 }
 149
 150 dhcp_remoteid_add() {
 151         local cfg="$1"
 152
 153         config_get networkid "$cfg" networkid
 154         [ -n "$networkid" ] || return 0
 155
 156         config_get remoteid "$cfg" remoteid
 157         [ -n "$remoteid" ] || return 0
 158
 159         append args "--dhcp-remoteid=$networkid,$remoteid"
 160
 161         dhcp_option_add "$cfg" "$networkid"
 162 }
 163
 164 dhcp_circuitid_add() {
 165         local cfg="$1"
 166
 167         config_get networkid "$cfg" networkid
 168         [ -n "$networkid" ] || return 0
 169
 170         config_get circuitid "$cfg" circuitid
 171         [ -n "$circuitid" ] || return 0
 172
 173         append args "--dhcp-circuitid=$networkid,$circuitid"
 174
 175         dhcp_option_add "$cfg" "$networkid"
 176 }
 177
 178 dhcp_userclass_add() {
 179         local cfg="$1"
 180
 181         config_get networkid "$cfg" networkid
 182         [ -n "$networkid" ] || return 0
 183
 184         config_get userclass "$cfg" userclass
 185         [ -n "$userclass" ] || return 0
 186
 187         append args "--dhcp-userclass=$networkid,$userclass"
 188
 189         dhcp_option_add "$cfg" "$networkid"
 190 }
 191
 192 dhcp_vendorclass_add() {
 193         local cfg="$1"
 194
 195         config_get networkid "$cfg" networkid
 196         [ -n "$networkid" ] || return 0
 197
 198         config_get vendorclass "$cfg" vendorclass
 199         [ -n "$vendorclass" ] || return 0
 200
 201         append args "--dhcp-vendorclass=$networkid,$vendorclass"
 202
 203         dhcp_option_add "$cfg" "$networkid"
 204 }
 205
 206 dhcp_host_add() {
 207         local cfg="$1"
 208
 209         config_get networkid "$cfg" networkid
 210         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid"
 211
 212         config_get name "$cfg" name
 213         config_get ip "$cfg" ip
 214         [ -n "$ip" ] || [ -n "$name" ] || return 0
 215
 216         macs=""
 217         config_get mac "$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}${ip:+,$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="${limit:-150}"
 303         [ "$limit" -gt 0 ] && limit=$((limit-1))
 304         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 305         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 306         append args "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 307
 308         dhcp_option_add "$cfg" "$networkid"
 309 }
 310
 311 dhcp_option_add() {
 312         local cfg="$1"
 313         local networkid="$2"
 314
 315         config_get dhcp_option "$cfg" dhcp_option
 316         for o in $dhcp_option; do
 317                 append args "-O $networkid","$o"
 318         done
 319
 320 }
 321
 322 dhcp_domain_add() {
 323         local cfg="$1"
 324         local ip name names
 325
 326         config_get names "$cfg" name
 327         [ -n "$names" ] || return 0
 328
 329         config_get ip "$cfg" ip
 330         [ -n "$ip" ] || return 0
 331
 332         local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
 333         local raddr="${4:+$4.$3.$2.$1.in-addr.arpa}"
 334
 335         for name in $names; do
 336                 local fqdn="$name"
 337
 338                 [ "${fqdn%.*}" == "$fqdn" ] && \
 339                         fqdn="$fqdn${DOMAIN:+.$DOMAIN}"
 340
 341                 append args "-A /$fqdn/$ip"
 342
 343                 [ -n "$raddr" ] && {
 344                         append args "--ptr-record=$raddr,$fqdn"
 345                         raddr=""
 346                 }
 347         done
 348 }
 349
 350 dhcp_srv_add() {
 351         local cfg="$1"
 352
 353         config_get srv "$cfg" srv
 354         [ -n "$srv" ] || return 0
 355
 356         config_get target "$cfg" target
 357         [ -n "$target" ] || return 0
 358
 359         config_get port "$cfg" port
 360
 361         local service="$srv,$target"
 362         [ -n "$port" ] && service="$service,$port"
 363
 364         append args "-W $service"
 365 }
 366
 367 dhcp_cname_add() {
 368         local cfg="$1"
 369         local cname target
 370
 371         config_get cname "$cfg" cname
 372         [ -n "$cname" ] || return 0
 373
 374         config_get target "$cfg" target
 375         [ -n "$target" ] || return 0
 376
 377         append args "--cname=${cname},${target}"
 378 }
 379
 380 start() {
 381         include /lib/network
 382         scan_interfaces
 383         config_load dhcp
 384
 385         args=""
 386         config_foreach dnsmasq dnsmasq
 387         config_foreach dhcp_host_add host
 388         config_foreach dhcp_boot_add boot
 389         config_foreach dhcp_mac_add mac
 390         config_foreach dhcp_vendorclass_add vendorclass
 391         config_foreach dhcp_userclass_add userclass
 392         config_foreach dhcp_circuitid_add circuitid
 393         config_foreach dhcp_remoteid_add remoteid
 394         config_foreach dhcp_subscrid_add subscrid
 395         config_foreach dhcp_domain_add domain
 396         config_foreach dhcp_srv_add srvhost
 397         config_foreach dhcp_add dhcp
 398         config_foreach dhcp_cname_add cname
 399
 400         /usr/sbin/dnsmasq $args && {
 401                 rm -f /tmp/resolv.conf
 402                 [ -n "$DOMAIN" ] && echo "search $DOMAIN" >> /tmp/resolv.conf
 403                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 404                 for DNS_SERVER in $DNS_SERVERS ; do
 405                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 406                 done
 407         }
 408 }
 409
 410 stop() {
 411         [ -f /tmp/resolv.conf ] && {
 412                 rm -f /tmp/resolv.conf
 413                 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 414         }
 415         service_kill dnsmasq /var/run/dnsmasq.pid
 416         return 0
 417 }