net/djbdns/files/dnscache.init

   1 #!/bin/sh /etc/rc.common
   2 # Copyright (C) 2007 OpenWrt.org
   3
   4 # Preferably start dnscache after udhcpd/dnsmasq, to be sure /etc/resolv.conf is set correctly. dnsmasq is at S60, so dnscache is put at S65 as seen below. If /etc/resolv.conf is not used, then dnscache may be started at S47, just after the firewall has been set up.
   5 START=65
   6 PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
   7 DAEMON=/usr/bin/dnscache
   8 NAME=dnscache
   9 DESC="Caching name server"
  10
  11 ROOT="/tmp/dnscache"
  12 resolvfile="/etc/resolv.conf"
  13
  14 start() {
  15     echo "Starting $DESC: $NAME"
  16     config_load djbdns
  17     config_foreach get_userids global
  18     mkdir -p $ROOT
  19     cp -fa /etc/dnscache/* $ROOT
  20     rm -f $ROOT/resolvers
  21     rm -f $ROOT/ignoreip
  22     chown -R $UID:$GID $ROOT
  23     config_foreach start_dnscache dnscache
  24 }
  25
  26 get_userids() {
  27     local cfg="$1"
  28     config_get UID "$cfg" runasuser
  29     config_get GID "$cfg" runasgroup
  30     UID=`id -u $UID`
  31     GID=`id -g $GID`
  32 }
  33
  34 append_server() {
  35     echo $1 >> $ROOT/resolvers
  36 }
  37
  38 append_ignore() {
  39     echo $1 >> $ROOT/ignoreip
  40 }
  41
  42 start_dnscache() {
  43     local cfg="$1"
  44     config_get logging        "$cfg" logging
  45     config_get useresolvconf  "$cfg" useresolvconf
  46     config_get iface          "$cfg" interface
  47     config_get ifacesend      "$cfg" interfacesend
  48     config_get defaultallowif "$cfg" defaultallowif
  49     config_get CACHESIZE      "$cfg" cachesize
  50     config_get FORWARDONLY    "$cfg" forwardonly
  51     config_get HIDETTL        "$cfg" hidettl
  52     config_list_foreach       "$cfg" "resolver" append_server
  53     config_get useignore      "$cfg" useignore
  54     if [ "$useignore" == "1" ] ; then
  55         config_list_foreach   "$cfg" "ignoreip" append_ignore
  56     fi
  57 # Add some interface network addresses to list of allowed IP addresses (assumes /24 networks)
  58     include /lib/network
  59     scan_interfaces
  60     if [ -n "$defaultallowif" ] ; then
  61         for myinterface in `echo $defaultallowif`; do
  62             config_get addr $myinterface ipaddr
  63             # the next line strips the last octet from the ip address
  64             addr=`echo $addr|sed 's/.[0-9]\+$//'`
  65             touch $ROOT/ip/$addr
  66             echo Adding $ROOT/ip/$addr
  67         done
  68     fi
  69 # Translate listen interface names to IP addresses
  70     config_get IP "$iface" ipaddr
  71 # Translante send interface name to an IP address
  72     config_get IPSEND "$ifacesend" ipaddr
  73 # Unset HIDETTL if equal to 0
  74     if [ "$HIDETTL" == "0" ] ; then
  75         export -n HIDETTL
  76     fi
  77 # If forwardingonly set then activate list of resolvers
  78     if [ "$FORWARDONLY" == "0" ] ; then
  79         # Unset FORWARDONLY if equal to '0'
  80         export -n FORWARDONLY
  81     else
  82 # Use either fixed list of dnsservers or resolv.conf data
  83         if [ "$useresolvconf" == "1" ] ; then
  84             if [ -s "$resolvfile" ] ; then
  85                cat $resolvfile|grep nameserver|sed 's/nameserver //g' > $ROOT/resolvers
  86             else
  87                echo Error: $resolvfile does not exist.
  88                exit 1
  89             fi
  90         fi
  91         if [ ! "`cat $ROOT/resolvers|wc -L`" == "0" ] ; then
  92             cp -f $ROOT/resolvers $ROOT/servers/@ > /dev/null 2>&1
  93         else
  94             echo Error: No resolvers are defined.
  95             exit 1
  96         fi
  97      fi
  98     export IP
  99     export ROOT
 100 # dnscache likes to receive a 128 byte random seed
 101     dd if=/dev/urandom of=$ROOT/randomseed bs=128 count=1  > /dev/null 2>&1
 102     if [ "$DEBUG" == 1 ] ; then
 103         $DAEMON < /$ROOT/randomseed
 104     elif [ "$logging" == '1' ] ; then
 105         $DAEMON 2>&1 < /$ROOT/randomseed | logger -p local1.info -t $NAME &
 106     else
 107         $DAEMON > /dev/null 2>&1 < /$ROOT/randomseed &
 108     fi
 109 }
 110
 111 stop() {
 112     echo -n "Stopping $DESC: $NAME"
 113     kill `pidof $NAME|sed "s/$$//g"` > /dev/null 2>&1
 114     echo " ."
 115 }
 116
 117 restart() {
 118     echo "Restarting $DESC: $NAME... "
 119     stop
 120     sleep 2
 121     start
 122 }
 123