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" "$option"
  27         [ "$_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 leasefile $cfg leasefile
  94         [ -e "$leasefile" ] || touch "$leasefile"
  95         config_get_bool cachelocal "$cfg" cachelocal 1
  96
  97         config_get hostsfile "$cfg" dhcphostsfile
  98         [ -e "$hostsfile" ] && append args "--dhcp-hostsfile=$hostsfile"
  99 }
 100
 101 dhcp_subscrid_add() {
 102         local cfg="$1"
 103
 104         config_get name "$cfg" name
 105         [ -n "$name" ] || return 0
 106
 107         config_get subscriberid "$cfg" subscriberid
 108         [ -n "$subscriberid" ] || return 0
 109
 110         append args "--dhcp-subscrid=$name,$subscriberid"
 111
 112         dhcp_option_add "$cfg" "$name"
 113 }
 114
 115 dhcp_remoteid_add() {
 116         local cfg="$1"
 117
 118         config_get name "$cfg" name
 119         [ -n "$name" ] || return 0
 120
 121         config_get remoteid "$cfg" remoteid
 122         [ -n "$remoteid" ] || return 0
 123
 124         append args "--dhcp-remoteid=$name,$remoteid"
 125
 126         dhcp_option_add "$cfg" "$name"
 127 }
 128
 129 dhcp_circuitid_add() {
 130         local cfg="$1"
 131
 132         config_get name "$cfg" name
 133         [ -n "$name" ] || return 0
 134
 135         config_get circuitid "$cfg" circuitid
 136         [ -n "$circuitid" ] || return 0
 137
 138         append args "--dhcp-circuitid=$name,$circuitid"
 139
 140         dhcp_option_add "$cfg" "$name"
 141 }
 142
 143 dhcp_userclass_add() {
 144         local cfg="$1"
 145
 146         config_get name "$cfg" name
 147         [ -n "$name" ] || return 0
 148
 149         config_get userclass "$cfg" userclass
 150         [ -n "$userclass" ] || return 0
 151
 152         append args "--dhcp-userclass=$name,$userclass"
 153
 154         dhcp_option_add "$cfg" "$name"
 155 }
 156
 157 dhcp_vendorclass_add() {
 158         local cfg="$1"
 159
 160         config_get name "$cfg" name
 161         [ -n "$name" ] || return 0
 162
 163         config_get vendorclass "$cfg" vendorclass
 164         [ -n "$vendorclass" ] || return 0
 165
 166         append args "--dhcp-vendorclass=$name,$vendorclass"
 167
 168         dhcp_option_add "$cfg" "$name"
 169 }
 170
 171 dhcp_host_add() {
 172         local cfg="$1"
 173
 174         config_get name "$cfg" name
 175         [ -n "$name" ] && dhcp_option_add "$cfg" "$name"
 176
 177         config_get mac "$cfg" mac
 178         [ -n "$mac" ] || return 0
 179
 180         config_get ip "$cfg" ip
 181         [ -n "$ip" ] || return 0
 182
 183         append args "--dhcp-host=$mac,${name:+net:$name,}$ip"
 184 }
 185
 186 dhcp_mac_add() {
 187         local cfg="$1"
 188
 189         config_get name "$cfg" name
 190         [ -n "$name" ] || return 0
 191
 192         config_get mac "$cfg" mac
 193         [ -n "$mac" ] || return 0
 194
 195         append args "--dhcp-mac=$name,$mac"
 196
 197         dhcp_option_add "$cfg" "$name"
 198 }
 199
 200 dhcp_boot_add() {
 201         local cfg="$1"
 202
 203         config_get name "$cfg" name
 204
 205         config_get filename "$cfg" filename
 206         [ -n "$filename" ] || return 0
 207
 208         config_get servername "$cfg" servername
 209         [ -n "$servername" ] || return 0
 210
 211         config_get serveraddress "$cfg" serveraddress
 212         [ -n "$serveraddress" ] || return 0
 213
 214         append args "--dhcp-boot=${name:+net:$name,}$filename,$servername,$serveraddress"
 215
 216         dhcp_option_add "$cfg" "$name"
 217 }
 218
 219
 220 dhcp_add() {
 221         local cfg="$1"
 222         config_get net "$cfg" interface
 223         [ -n "$net" ] || return 0
 224
 225         config_get name "$cfg" name
 226         [ -n "$name" ] || name="$net"
 227
 228         config_get ifname "$net" ifname
 229         [ -n "$ifname" ] || return 0
 230
 231         config_get dnsserver "$net" dns
 232         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
 233                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 234         }
 235
 236         append_bool "$cfg" ignore "-2 $ifname" && return 0
 237
 238         config_get proto "$net" proto
 239         [ static = "$proto" ] || return 0
 240
 241         config_get ipaddr "$net" ipaddr
 242         config_get netmask "$cfg" netmask
 243         [ -n "$netmask" ] || config_get netmask "$net" netmask
 244
 245         #check for an already active dhcp server on the interface, unless 'force' is set
 246         config_get_bool force "$cfg" force 0
 247         [ "$force" -gt 0 ] || {
 248                 udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && return 0
 249         }
 250
 251         config_get start "$cfg" start
 252         config_get limit "$cfg" limit
 253         config_get leasetime "$cfg" leasetime
 254         config_get options "$cfg" options
 255         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 256
 257         leasetime="${leasetime:-12h}"
 258         start="$(dhcp_calc "${start:-100}")"
 259         limit="$((${limit:-150} + 1))"
 260         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 261         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 262         append args "--dhcp-range=$name,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 263
 264         dhcp_option_add "$cfg" "$name"
 265 }
 266
 267 dhcp_option_add() {
 268         local cfg="$1"
 269         local name="$2"
 270
 271         config_get dhcp_option "$cfg" dhcp_option
 272         for o in $dhcp_option; do
 273                 append args "-O $name","$o"
 274         done
 275
 276 }
 277
 278 dhcp_domain_add() {
 279         local cfg="$1"
 280
 281         config_get name "$cfg" name
 282         [ -n "$name" ] || return 0
 283
 284         config_get ip "$cfg" ip
 285         [ -n "$ip" ] || return 0
 286
 287         local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
 288         append args "-A /$name${DOMAIN:+.$DOMAIN}/$ip"
 289         append args "--ptr-record=$4.$3.$2.$1.in-addr.arpa,$name${DOMAIN:+.$DOMAIN}"
 290 }
 291
 292 start() {
 293         include /lib/network
 294         scan_interfaces
 295         config_load dhcp
 296
 297         args=""
 298         config_foreach dnsmasq dnsmasq
 299         config_foreach dhcp_host_add host
 300         config_foreach dhcp_boot_add boot
 301         config_foreach dhcp_mac_add mac
 302         config_foreach dhcp_vendorclass_add vendorclass
 303         config_foreach dhcp_userclass_add userclass
 304         config_foreach dhcp_circuitid_add circuitid
 305         config_foreach dhcp_remoteid_add remoteid
 306         config_foreach dhcp_subscrid_add subscrid
 307         config_foreach dhcp_domain_add domain
 308         config_foreach dhcp_add dhcp
 309
 310         /usr/sbin/dnsmasq $args && {
 311                 rm -f /tmp/resolv.conf
 312                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 313                 for DNS_SERVER in $DNS_SERVERS ; do
 314                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 315                 done
 316         }
 317 }
 318
 319 stop() {
 320         [ -f /tmp/resolv.conf ] && {
 321                 rm -f /tmp/resolv.conf
 322                 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 323         }
 324         killall dnsmasq
 325         return 0
 326 }