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 dnsmasq() {
  53         local cfg="$1"
  54         append_bool "$cfg" authoritative "-K"
  55         append_bool "$cfg" nodaemon "-d"
  56         append_bool "$cfg" domainneeded "-D"
  57         append_bool "$cfg" filterwin2k "-f"
  58         append_bool "$cfg" nohosts "-h"
  59         append_bool "$cfg" nonegcache "-N"
  60         append_bool "$cfg" strictorder "-o"
  61         append_bool "$cfg" logqueries "-q"
  62         append_bool "$cfg" noresolv "-R"
  63         append_bool "$cfg" localise_queries "-y"
  64         append_bool "$cfg" readethers "-Z"
  65         append_bool "$cfg" dbus "-1"
  66         append_bool "$cfg" boguspriv "-b"
  67         append_bool "$cfg" expandhosts "-E"
  68         append_bool "$cfg" enable_tftp "--enable-tftp"
  69         append_bool "$cfg" nonwildcard "-z"
  70
  71         append_parm "$cfg" dnsforwardmax "-0"
  72         append_parm "$cfg" port "-p"
  73         append_parm "$cfg" ednspacket_max "-P"
  74         append_parm "$cfg" dhcpleasemax "-X"
  75         append_parm "$cfg" "addnhosts" "-H"
  76         append_parm "$cfg" "queryport" "-Q"
  77         append_parm "$cfg" "domain" "-s"
  78         append_parm "$cfg" "local" "-S"
  79         config_list_foreach "$cfg" "server" append_server
  80         config_list_foreach "$cfg" "interface" append_interface
  81         config_list_foreach "$cfg" "notinterface" append_notinterface
  82         append_parm "$cfg" "leasefile" "-l"
  83         append_parm "$cfg" "resolvfile" "-r"
  84         append_parm "$cfg" "tftp_root" "--tftp-root"
  85         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
  86
  87         config_get DOMAIN "$cfg" domain
  88
  89         config_get leasefile $cfg leasefile
  90         [ -e "$leasefile" ] || touch "$leasefile"
  91         config_get_bool cachelocal "$cfg" cachelocal 1
  92
  93         config_get hostsfile "$cfg" dhcphostsfile
  94         [ -e "$hostsfile" ] && append args "--dhcp-hostsfile=$hostsfile"
  95 }
  96
  97 dhcp_subscrid_add() {
  98         local cfg="$1"
  99
 100         config_get name "$cfg" name
 101         [ -n "$name" ] || return 0
 102
 103         config_get subscriberid "$cfg" subscriberid
 104         [ -n "$subscriberid" ] || return 0
 105
 106         append args "--dhcp-subscrid=$name,$subscriberid"
 107
 108         dhcp_option_add "$cfg" "$name"
 109 }
 110
 111 dhcp_remoteid_add() {
 112         local cfg="$1"
 113
 114         config_get name "$cfg" name
 115         [ -n "$name" ] || return 0
 116
 117         config_get remoteid "$cfg" remoteid
 118         [ -n "$remoteid" ] || return 0
 119
 120         append args "--dhcp-remoteid=$name,$remoteid"
 121
 122         dhcp_option_add "$cfg" "$name"
 123 }
 124
 125 dhcp_circuitid_add() {
 126         local cfg="$1"
 127
 128         config_get name "$cfg" name
 129         [ -n "$name" ] || return 0
 130
 131         config_get circuitid "$cfg" circuitid
 132         [ -n "$circuitid" ] || return 0
 133
 134         append args "--dhcp-circuitid=$name,$circuitid"
 135
 136         dhcp_option_add "$cfg" "$name"
 137 }
 138
 139 dhcp_userclass_add() {
 140         local cfg="$1"
 141
 142         config_get name "$cfg" name
 143         [ -n "$name" ] || return 0
 144
 145         config_get userclass "$cfg" userclass
 146         [ -n "$userclass" ] || return 0
 147
 148         append args "--dhcp-userclass=$name,$userclass"
 149
 150         dhcp_option_add "$cfg" "$name"
 151 }
 152
 153 dhcp_vendorclass_add() {
 154         local cfg="$1"
 155
 156         config_get name "$cfg" name
 157         [ -n "$name" ] || return 0
 158
 159         config_get vendorclass "$cfg" vendorclass
 160         [ -n "$vendorclass" ] || return 0
 161
 162         append args "--dhcp-vendorclass=$name,$vendorclass"
 163
 164         dhcp_option_add "$cfg" "$name"
 165 }
 166
 167 dhcp_host_add() {
 168         local cfg="$1"
 169
 170         config_get name "$cfg" name
 171         [ -n "$name" ] && dhcp_option_add "$cfg" "$name"
 172
 173         config_get mac "$cfg" mac
 174         [ -n "$mac" ] || return 0
 175
 176         config_get ip "$cfg" ip
 177         [ -n "$ip" ] || return 0
 178
 179         append args "--dhcp-host=$mac,$ip${name:+,$name}"
 180 }
 181
 182 dhcp_mac_add() {
 183         local cfg="$1"
 184
 185         config_get name "$cfg" name
 186         [ -n "$name" ] || return 0
 187
 188         config_get mac "$cfg" mac
 189         [ -n "$mac" ] || return 0
 190
 191         append args "--dhcp-mac=$name,$mac"
 192
 193         dhcp_option_add "$cfg" "$name"
 194 }
 195
 196 dhcp_boot_add() {
 197         local cfg="$1"
 198
 199         config_get name "$cfg" name
 200
 201         config_get filename "$cfg" filename
 202         [ -n "$filename" ] || return 0
 203
 204         config_get servername "$cfg" servername
 205         [ -n "$servername" ] || return 0
 206
 207         config_get serveraddress "$cfg" serveraddress
 208         [ -n "$serveraddress" ] || return 0
 209
 210         append args "--dhcp-boot=${name:+net:$name,}$filename,$servername,$serveraddress"
 211
 212         dhcp_option_add "$cfg" "$name"
 213 }
 214
 215
 216 dhcp_add() {
 217         local cfg="$1"
 218         config_get net "$cfg" interface
 219         [ -n "$net" ] || return 0
 220
 221         config_get name "$cfg" name
 222         [ -n "$name" ] || name="$net"
 223
 224         config_get ifname "$net" ifname
 225         [ -n "$ifname" ] || return 0
 226
 227         config_get dnsserver "$net" dns
 228         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
 229                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 230         }
 231
 232         append_bool "$cfg" ignore "-2 $ifname" && return 0
 233
 234         config_get proto "$net" proto
 235         [ static = "$proto" ] || return 0
 236
 237         config_get ipaddr "$net" ipaddr
 238         config_get netmask "$cfg" netmask
 239         [ -n "$netmask" ] || config_get netmask "$net" netmask
 240
 241         #check for an already active dhcp server on the interface, unless 'force' is set
 242         config_get_bool force "$cfg" force 0
 243         [ "$force" -gt 0 ] || {
 244                 udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && return 0
 245         }
 246
 247         config_get start "$cfg" start
 248         config_get limit "$cfg" limit
 249         config_get leasetime "$cfg" leasetime
 250         config_get options "$cfg" options
 251         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 252
 253         leasetime="${leasetime:-12h}"
 254         start="$(dhcp_calc "${start:-100}")"
 255         limit="$((${limit:-150} + 1))"
 256         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 257         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 258         append args "--dhcp-range=$name,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 259
 260         dhcp_option_add "$cfg" "$name"
 261 }
 262
 263 dhcp_option_add() {
 264         local cfg="$1"
 265         local name="$2"
 266
 267         config_get dhcp_option "$cfg" dhcp_option
 268         for o in $dhcp_option; do
 269                 append args "-O $name","$o"
 270         done
 271
 272 }
 273
 274 dhcp_domain_add() {
 275         local cfg="$1"
 276
 277         config_get name "$cfg" name
 278         [ -n "$name" ] || return 0
 279
 280         config_get ip "$cfg" ip
 281         [ -n "$ip" ] || return 0
 282
 283         local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
 284         append args "-A /$name${DOMAIN:+.$DOMAIN}/$ip"
 285         append args "--ptr-record=$4.$3.$2.$1.in-addr.arpa,$name${DOMAIN:+.$DOMAIN}"
 286 }
 287
 288 start() {
 289         include /lib/network
 290         scan_interfaces
 291         config_load dhcp
 292
 293         args=""
 294         config_foreach dnsmasq dnsmasq
 295         config_foreach dhcp_host_add host
 296         config_foreach dhcp_boot_add boot
 297         config_foreach dhcp_mac_add mac
 298         config_foreach dhcp_vendorclass_add vendorclass
 299         config_foreach dhcp_userclass_add userclass
 300         config_foreach dhcp_circuitid_add circuitid
 301         config_foreach dhcp_remoteid_add remoteid
 302         config_foreach dhcp_subscrid_add subscrid
 303         config_foreach dhcp_domain_add domain
 304         config_foreach dhcp_add dhcp
 305
 306         /usr/sbin/dnsmasq $args && {
 307                 rm -f /tmp/resolv.conf
 308                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 309                 for DNS_SERVER in $DNS_SERVERS ; do
 310                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 311                 done
 312         }
 313 }
 314
 315 stop() {
 316         [ -f /tmp/resolv.conf ] && {
 317                 rm -f /tmp/resolv.conf
 318                 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 319         }
 320         killall dnsmasq
 321         return 0
 322 }