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