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