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
   7 dhcp_calc() {
   8         local ip="$1"
   9         local res=0
  10
  11         while [ -n "$ip" ]; do
  12                 part="${ip%%.*}"
  13                 res="$(($res * 256))"
  14                 res="$(($res + $part))"
  15                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
  16         done
  17         echo "$res"
  18 }
  19
  20 append_bool() {
  21         local section="$1"
  22         local option="$2"
  23         local value="$3"
  24         local _loctmp
  25         config_get_bool _loctmp "$section" "$option"
  26         [ "$_loctmp" -gt 0 ] && append args "$value"
  27 }
  28
  29 append_parm() {
  30         local section="$1"
  31         local option="$2"
  32         local switch="$3"
  33         local _loctmp
  34         config_get _loctmp "$section" "$option"
  35         [ -z "$_loctmp" ] && return 0
  36         append args "$switch $_loctmp"
  37 }
  38
  39 dnsmasq() {
  40         local cfg="$1"
  41         append_bool "$cfg" authoritative "-K"
  42         append_bool "$cfg" nodaemon "-d"
  43         append_bool "$cfg" domainneeded "-D"
  44         append_bool "$cfg" filterwin2k "-f"
  45         append_bool "$cfg" nohosts "-h"
  46         append_bool "$cfg" nonegcache "-N"
  47         append_bool "$cfg" strictorder "-o"
  48         append_bool "$cfg" logqueries "-q"
  49         append_bool "$cfg" noresolv "-R"
  50         append_bool "$cfg" localise_queries "-y"
  51         append_bool "$cfg" readethers "-Z"
  52         append_bool "$cfg" dbus "-1"
  53         append_bool "$cfg" boguspriv "-b"
  54         append_bool "$cfg" expandhosts "-E"
  55
  56         append_parm "$cfg" dnsforwardmax "-0"
  57         append_parm "$cfg" port "-p"
  58         append_parm "$cfg" ednspacket_max "-P"
  59         append_parm "$cfg" dhcpleasemax "-X"
  60         append_parm "$cfg" "addnhosts" "-H"
  61         append_parm "$cfg" "queryport" "-Q"
  62         append_parm "$cfg" "domain" "-s"
  63         append_parm "$cfg" "local" "-S"
  64         append_parm "$cfg" "leasefile" "-l"
  65         append_parm "$cfg" "resolvfile" "-r"
  66
  67         config_get leasefile $cfg leasefile
  68         [ -e "$leasefile" ] || touch "$leasefile"
  69         config_get_bool cachelocal "$cfg" cachelocal 1
  70 }
  71
  72 dhcp_subscrid_add() {
  73         local cfg="$1"
  74
  75         config_get name "$cfg" name
  76         [ -n "$name" ] || return 0
  77
  78         config_get subscriberid "$cfg" subscriberid
  79         [ -n "$subscriberid" ] || return 0
  80
  81         append args "--dhcp-subscrid=$name,$subscriberid"
  82
  83         dhcp_option_add "$cfg" "$name"
  84 }
  85
  86 dhcp_remoteid_add() {
  87         local cfg="$1"
  88
  89         config_get name "$cfg" name
  90         [ -n "$name" ] || return 0
  91
  92         config_get remoteid "$cfg" remoteid
  93         [ -n "$remoteid" ] || return 0
  94
  95         append args "--dhcp-remoteid=$name,$remoteid"
  96
  97         dhcp_option_add "$cfg" "$name"
  98 }
  99
 100 dhcp_circuitid_add() {
 101         local cfg="$1"
 102
 103         config_get name "$cfg" name
 104         [ -n "$name" ] || return 0
 105
 106         config_get circuitid "$cfg" circuitid
 107         [ -n "$circuitid" ] || return 0
 108
 109         append args "--dhcp-circuitid=$name,$circuitid"
 110
 111         dhcp_option_add "$cfg" "$name"
 112 }
 113
 114 dhcp_userclass_add() {
 115         local cfg="$1"
 116
 117         config_get name "$cfg" name
 118         [ -n "$name" ] || return 0
 119
 120         config_get userclass "$cfg" userclass
 121         [ -n "$userclass" ] || return 0
 122
 123         append args "--dhcp-userclass=$name,$userclass"
 124
 125         dhcp_option_add "$cfg" "$name"
 126 }
 127
 128 dhcp_vendorclass_add() {
 129         local cfg="$1"
 130
 131         config_get name "$cfg" name
 132         [ -n "$name" ] || return 0
 133
 134         config_get vendorclass "$cfg" vendorclass
 135         [ -n "$vendorclass" ] || return 0
 136
 137         append args "--dhcp-vendorclass=$name,$vendorclass"
 138
 139         dhcp_option_add "$cfg" "$name"
 140 }
 141
 142 dhcp_host_add() {
 143         local cfg="$1"
 144
 145         config_get name "$cfg" name
 146         [ -n "$name" ] || return 0
 147
 148         config_get mac "$cfg" mac
 149         [ -n "$mac" ] || return 0
 150
 151         config_get ip "$cfg" ip
 152         [ -n "$ip" ] || return 0
 153
 154         append args "--dhcp-host=$mac,$ip"
 155
 156         dhcp_option_add "$cfg" "$name"
 157 }
 158
 159 dhcp_mac_add() {
 160         local cfg="$1"
 161
 162         config_get name "$cfg" name
 163         [ -n "$name" ] || return 0
 164
 165         config_get mac "$cfg" mac
 166         [ -n "$mac" ] || return 0
 167
 168         append args "--dhcp-mac=$name,$mac"
 169
 170         dhcp_option_add "$cfg" "$name"
 171 }
 172
 173 dhcp_boot_add() {
 174         local cfg="$1"
 175
 176         config_get name "$cfg" name
 177         [ -n "$name" ] || return 0
 178
 179         config_get filename "$cfg" filename
 180         [ -n "$filename" ] || return 0
 181
 182         config_get servername "$cfg" servername
 183         [ -n "$servername" ] || return 0
 184
 185         config_get serveraddress "$cfg" serveraddress
 186         [ -n "$serveraddress" ] || return 0
 187
 188         append args "--dhcp-boot=net:$name,$filename,$servername,$serveraddress"
 189
 190         dhcp_option_add "$cfg" "$name"
 191 }
 192
 193
 194 dhcp_add() {
 195         local cfg="$1"
 196         config_get net "$cfg" interface
 197         [ -n "$net" ] || return 0
 198
 199         config_get name "$cfg" name
 200         [ -n "$name" ] || name="$net"
 201
 202         config_get ifname "$net" ifname
 203         [ -n "$ifname" ] || return 0
 204
 205         config_get dnsserver "$net" dns
 206         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
 207                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 208         }
 209
 210         append_bool "$cfg" ignore "-2 $ifname"
 211
 212         config_get proto "$net" proto
 213         [ static = "$proto" ] || return 0
 214
 215         config_get ipaddr "$net" ipaddr
 216         config_get netmask "$cfg" netmask
 217         [ -n "$netmask" ] || config_get netmask "$net" netmask
 218
 219         #check for an already active dhcp server on the interface, unless 'force' is set
 220         config_get_bool force "$cfg" force 0
 221         [ "$force" -gt 0 ] || {
 222                 udhcpc -n -q -R -s /bin/true -t 1 -i $ifname >&- && return 0
 223         }
 224
 225         config_get start "$cfg" start
 226         config_get limit "$cfg" limit
 227         config_get leasetime "$cfg" leasetime
 228         config_get options "$cfg" options
 229         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 230
 231         leasetime="${leasetime:-12h}"
 232         start="$(dhcp_calc "${start:-100}")"
 233         limit="$((${limit:-150} + 1))"
 234         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 235         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 236         append args "--dhcp-range=$name,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 237
 238         dhcp_option_add "$cfg" "$name"
 239 }
 240
 241 dhcp_option_add() {
 242         local cfg="$1"
 243         local name="$2"
 244
 245         config_get dhcp_option "$cfg" dhcp_option
 246         for o in $dhcp_option; do
 247                 append args "-O $name","$o"
 248         done
 249
 250 }
 251
 252 start() {
 253         include /lib/network
 254         scan_interfaces
 255         config_load dhcp
 256
 257         args=""
 258         config_foreach dnsmasq dnsmasq
 259         config_foreach dhcp_host_add host
 260         config_foreach dhcp_boot_add boot
 261         config_foreach dhcp_mac_add mac
 262         config_foreach dhcp_vendorclass_add vendorclass
 263         config_foreach dhcp_userclass_add userclass
 264         config_foreach dhcp_circuitid_add circuitid
 265         config_foreach dhcp_remoteid_add remoteid
 266         config_foreach dhcp_subscrid_add subscrid
 267         config_foreach dhcp_add dhcp
 268
 269         /usr/sbin/dnsmasq $args && {
 270                 rm -f /tmp/resolv.conf
 271                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 272                 for DNS_SERVER in $DNS_SERVERS ; do
 273                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 274                 done
 275         }
 276 }
 277
 278 stop() {
 279         [ -f /tmp/resolv.conf ] && {
 280                 rm -f /tmp/resolv.conf
 281                 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 282         }
 283         killall dnsmasq
 284         return 0
 285 }