package/dnsmasq/files/dnsmasq.init

   1 #!/bin/sh /etc/rc.common
   2 # Copyright (C) 2007 OpenWrt.org
   3
   4 START=60
   5
   6 SERVICE_USE_PID=1
   7
   8 DNS_SERVERS=""
   9 DOMAIN=""
  10
  11 dhcp_calc() {
  12         local ip="$1"
  13         local res=0
  14
  15         while [ -n "$ip" ]; do
  16                 part="${ip%%.*}"
  17                 res="$(($res * 256))"
  18                 res="$(($res + $part))"
  19                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
  20         done
  21         echo "$res"
  22 }
  23
  24 append_bool() {
  25         local section="$1"
  26         local option="$2"
  27         local value="$3"
  28         local _loctmp
  29         config_get_bool _loctmp "$section" "$option" 0
  30         [ $_loctmp -gt 0 ] && append args "$value"
  31 }
  32
  33 append_parm() {
  34         local section="$1"
  35         local option="$2"
  36         local switch="$3"
  37         local _loctmp
  38         config_get _loctmp "$section" "$option"
  39         [ -z "$_loctmp" ] && return 0
  40         append args "$switch $_loctmp"
  41 }
  42
  43 append_server() {
  44         append args "-S $1"
  45 }
  46
  47 append_interface() {
  48         local ifname=$(uci_get_state network "$1" ifname "$1")
  49         append args "-i $ifname"
  50 }
  51
  52 append_notinterface() {
  53         local ifname=$(uci_get_state network "$1" ifname "$1")
  54         append args "-I $ifname"
  55 }
  56
  57 append_addnhosts() {
  58         append args "-H $1"
  59 }
  60
  61 append_bogusnxdomain() {
  62        append args "-B $1"
  63 }
  64
  65 dnsmasq() {
  66         local cfg="$1"
  67         append_bool "$cfg" authoritative "-K"
  68         append_bool "$cfg" nodaemon "-d"
  69         append_bool "$cfg" domainneeded "-D"
  70         append_bool "$cfg" filterwin2k "-f"
  71         append_bool "$cfg" nohosts "-h"
  72         append_bool "$cfg" nonegcache "-N"
  73         append_bool "$cfg" strictorder "-o"
  74         append_bool "$cfg" logqueries "-q"
  75         append_bool "$cfg" noresolv "-R"
  76         append_bool "$cfg" localise_queries "-y"
  77         append_bool "$cfg" readethers "-Z"
  78         append_bool "$cfg" dbus "-1"
  79         append_bool "$cfg" boguspriv "-b"
  80         append_bool "$cfg" expandhosts "-E"
  81         append_bool "$cfg" enable_tftp "--enable-tftp"
  82         append_bool "$cfg" nonwildcard "-z"
  83
  84         append_parm "$cfg" dhcpscript "-6"
  85         append_parm "$cfg" cachesize "-c"
  86         append_parm "$cfg" dnsforwardmax "-0"
  87         append_parm "$cfg" port "-p"
  88         append_parm "$cfg" ednspacket_max "-P"
  89         append_parm "$cfg" dhcpleasemax "-X"
  90         append_parm "$cfg" "queryport" "-Q"
  91         append_parm "$cfg" "domain" "-s"
  92         append_parm "$cfg" "local" "-S"
  93         config_list_foreach "$cfg" "server" append_server
  94         config_list_foreach "$cfg" "interface" append_interface
  95         config_list_foreach "$cfg" "notinterface" append_notinterface
  96         config_list_foreach "$cfg" "addnhosts" append_addnhosts
  97         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
  98         append_parm "$cfg" "leasefile" "-l"
  99         append_parm "$cfg" "resolvfile" "-r"
 100         append_parm "$cfg" "tftp_root" "--tftp-root"
 101         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 102
 103         config_get DOMAIN "$cfg" domain
 104
 105         config_get_bool readethers "$cfg" readethers
 106         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 107
 108         config_get leasefile $cfg leasefile
 109         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 110         config_get_bool cachelocal "$cfg" cachelocal 1
 111
 112         config_get hostsfile "$cfg" dhcphostsfile
 113         [ -e "$hostsfile" ] && append args "--dhcp-hostsfile=$hostsfile"
 114
 115         local rebind
 116         config_get_bool rebind "$cfg" rebind_protection 1
 117         [ $rebind -gt 0 ] && {
 118                 logger -t dnsmasq \
 119                         "DNS rebinding protection is active," \
 120                         "will discard upstream RFC1918 responses!"
 121                 append args "--stop-dns-rebind"
 122
 123                 local rebind_localhost
 124                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 125                 [ $rebind_localhost -gt 0 ] && {
 126                         logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
 127                         append args "--rebind-localhost-ok"
 128                 }
 129
 130                 append_rebind_domain() {
 131                         logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
 132                         append args "--rebind-domain-ok=$1"
 133                 }
 134
 135                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 136         }
 137 }
 138
 139 dhcp_subscrid_add() {
 140         local cfg="$1"
 141
 142         config_get networkid "$cfg" networkid
 143         [ -n "$networkid" ] || return 0
 144
 145         config_get subscriberid "$cfg" subscriberid
 146         [ -n "$subscriberid" ] || return 0
 147
 148         append args "--dhcp-subscrid=$networkid,$subscriberid"
 149
 150         dhcp_option_add "$cfg" "$networkid"
 151 }
 152
 153 dhcp_remoteid_add() {
 154         local cfg="$1"
 155
 156         config_get networkid "$cfg" networkid
 157         [ -n "$networkid" ] || return 0
 158
 159         config_get remoteid "$cfg" remoteid
 160         [ -n "$remoteid" ] || return 0
 161
 162         append args "--dhcp-remoteid=$networkid,$remoteid"
 163
 164         dhcp_option_add "$cfg" "$networkid"
 165 }
 166
 167 dhcp_circuitid_add() {
 168         local cfg="$1"
 169
 170         config_get networkid "$cfg" networkid
 171         [ -n "$networkid" ] || return 0
 172
 173         config_get circuitid "$cfg" circuitid
 174         [ -n "$circuitid" ] || return 0
 175
 176         append args "--dhcp-circuitid=$networkid,$circuitid"
 177
 178         dhcp_option_add "$cfg" "$networkid"
 179 }
 180
 181 dhcp_userclass_add() {
 182         local cfg="$1"
 183
 184         config_get networkid "$cfg" networkid
 185         [ -n "$networkid" ] || return 0
 186
 187         config_get userclass "$cfg" userclass
 188         [ -n "$userclass" ] || return 0
 189
 190         append args "--dhcp-userclass=$networkid,$userclass"
 191
 192         dhcp_option_add "$cfg" "$networkid"
 193 }
 194
 195 dhcp_vendorclass_add() {
 196         local cfg="$1"
 197
 198         config_get networkid "$cfg" networkid
 199         [ -n "$networkid" ] || return 0
 200
 201         config_get vendorclass "$cfg" vendorclass
 202         [ -n "$vendorclass" ] || return 0
 203
 204         append args "--dhcp-vendorclass=$networkid,$vendorclass"
 205
 206         dhcp_option_add "$cfg" "$networkid"
 207 }
 208
 209 dhcp_host_add() {
 210         local cfg="$1"
 211
 212         config_get networkid "$cfg" networkid
 213         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid"
 214
 215         config_get name "$cfg" name
 216         config_get ip "$cfg" ip
 217         [ -n "$ip" ] || [ -n "$name" ] || return 0
 218
 219         macs=""
 220         config_get mac "$cfg" mac
 221         for m in $mac; do append macs "$m" ","; done
 222         [ -n "$macs" ] || return 0
 223
 224         append args "--dhcp-host=$macs${networkid:+,net:$networkid}${ip:+,$ip}${name:+,$name}"
 225 }
 226
 227 dhcp_mac_add() {
 228         local cfg="$1"
 229
 230         config_get networkid "$cfg" networkid
 231         [ -n "$networkid" ] || return 0
 232
 233         config_get mac "$cfg" mac
 234         [ -n "$mac" ] || return 0
 235
 236         append args "--dhcp-mac=$networkid,$mac"
 237
 238         dhcp_option_add "$cfg" "$networkid"
 239 }
 240
 241 dhcp_boot_add() {
 242         local cfg="$1"
 243
 244         config_get networkid "$cfg" networkid
 245
 246         config_get filename "$cfg" filename
 247         [ -n "$filename" ] || return 0
 248
 249         config_get servername "$cfg" servername
 250         [ -n "$servername" ] || return 0
 251
 252         config_get serveraddress "$cfg" serveraddress
 253         [ -n "$serveraddress" ] || return 0
 254
 255         append args "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
 256
 257         dhcp_option_add "$cfg" "$networkid"
 258 }
 259
 260
 261 dhcp_add() {
 262         local cfg="$1"
 263         config_get net "$cfg" interface
 264         [ -n "$net" ] || return 0
 265
 266         config_get networkid "$cfg" networkid
 267         [ -n "$networkid" ] || networkid="$net"
 268
 269         config_get ifname "$net" ifname
 270         [ -n "$ifname" ] || return 0
 271
 272         config_get dnsserver "$net" dns
 273         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
 274                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 275         }
 276
 277         append_bool "$cfg" ignore "-2 $ifname" && return 0
 278
 279         config_get proto "$net" proto
 280         [ static = "$proto" ] || return 0
 281
 282         config_get ipaddr "$net" ipaddr
 283         config_get netmask "$cfg" netmask
 284         [ -n "$netmask" ] || config_get netmask "$net" netmask
 285
 286         #check for an already active dhcp server on the interface, unless 'force' is set
 287         config_get_bool force "$cfg" force 0
 288         [ $force -gt 0 ] || {
 289                 udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && {
 290                         logger -t dnsmasq \
 291                                 "found already running DHCP-server on interface '$ifname'" \
 292                                 "refusing to start, use 'option force 1' to override"
 293                         return 0
 294                 }
 295         }
 296
 297         config_get start "$cfg" start
 298         config_get limit "$cfg" limit
 299         config_get leasetime "$cfg" leasetime
 300         config_get options "$cfg" options
 301         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 302
 303         leasetime="${leasetime:-12h}"
 304         start="$(dhcp_calc "${start:-100}")"
 305         limit="${limit:-150}"
 306         [ "$limit" -gt 0 ] && limit=$((limit-1))
 307         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 308         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 309         append args "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 310
 311         dhcp_option_add "$cfg" "$networkid"
 312 }
 313
 314 dhcp_option_add() {
 315         local cfg="$1"
 316         local networkid="$2"
 317
 318         config_get dhcp_option "$cfg" dhcp_option
 319         for o in $dhcp_option; do
 320                 append args "-O $networkid","$o"
 321         done
 322
 323 }
 324
 325 dhcp_domain_add() {
 326         local cfg="$1"
 327         local ip name names
 328
 329         config_get names "$cfg" name
 330         [ -n "$names" ] || return 0
 331
 332         config_get ip "$cfg" ip
 333         [ -n "$ip" ] || return 0
 334
 335         local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
 336         local raddr="${4:+$4.$3.$2.$1.in-addr.arpa}"
 337
 338         for name in $names; do
 339                 local fqdn="$name"
 340
 341                 [ "${fqdn%.*}" == "$fqdn" ] && \
 342                         fqdn="$fqdn${DOMAIN:+.$DOMAIN}"
 343
 344                 append args "-A /$fqdn/$ip"
 345
 346                 [ -n "$raddr" ] && {
 347                         append args "--ptr-record=$raddr,$fqdn"
 348                         raddr=""
 349                 }
 350         done
 351 }
 352
 353 dhcp_srv_add() {
 354         local cfg="$1"
 355
 356         config_get srv "$cfg" srv
 357         [ -n "$srv" ] || return 0
 358
 359         config_get target "$cfg" target
 360         [ -n "$target" ] || return 0
 361
 362         config_get port "$cfg" port
 363
 364         local service="$srv,$target"
 365         [ -n "$port" ] && service="$service,$port"
 366
 367         append args "-W $service"
 368 }
 369
 370 dhcp_cname_add() {
 371         local cfg="$1"
 372         local cname target
 373
 374         config_get cname "$cfg" cname
 375         [ -n "$cname" ] || return 0
 376
 377         config_get target "$cfg" target
 378         [ -n "$target" ] || return 0
 379
 380         append args "--cname=${cname},${target}"
 381 }
 382
 383 start() {
 384         include /lib/network
 385         scan_interfaces
 386         config_load dhcp
 387
 388         args=""
 389         config_foreach dnsmasq dnsmasq
 390         config_foreach dhcp_host_add host
 391         config_foreach dhcp_boot_add boot
 392         config_foreach dhcp_mac_add mac
 393         config_foreach dhcp_vendorclass_add vendorclass
 394         config_foreach dhcp_userclass_add userclass
 395         config_foreach dhcp_circuitid_add circuitid
 396         config_foreach dhcp_remoteid_add remoteid
 397         config_foreach dhcp_subscrid_add subscrid
 398         config_foreach dhcp_domain_add domain
 399         config_foreach dhcp_srv_add srvhost
 400         config_foreach dhcp_add dhcp
 401         config_foreach dhcp_cname_add cname
 402
 403         service_start /usr/sbin/dnsmasq $args && {
 404                 rm -f /tmp/resolv.conf
 405                 [ -n "$DOMAIN" ] && echo "search $DOMAIN" >> /tmp/resolv.conf
 406                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 407                 for DNS_SERVER in $DNS_SERVERS ; do
 408                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 409                 done
 410         }
 411 }
 412
 413 stop() {
 414         service_stop /usr/sbin/dnsmasq && {
 415                 [ -f /tmp/resolv.conf ] && {
 416                         rm -f /tmp/resolv.conf
 417                         ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 418                 }
 419         }
 420 }