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