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 "$cfg" domain
  92
  93         config_get_bool readethers "$cfg" readethers
  94         [ "$readethers" = "1" ] && [ -e "/etc/ethers" ] || touch /etc/ethers
  95
  96         config_get leasefile $cfg leasefile
  97         [ -e "$leasefile" ] || touch "$leasefile"
  98         config_get_bool cachelocal "$cfg" cachelocal 1
  99
 100         config_get hostsfile "$cfg" dhcphostsfile
 101         [ -e "$hostsfile" ] && append args "--dhcp-hostsfile=$hostsfile"
 102 }
 103
 104 dhcp_subscrid_add() {
 105         local cfg="$1"
 106
 107         config_get networkid "$cfg" networkid
 108         [ -n "$networkid" ] || return 0
 109
 110         config_get subscriberid "$cfg" subscriberid
 111         [ -n "$subscriberid" ] || return 0
 112
 113         append args "--dhcp-subscrid=$networkid,$subscriberid"
 114
 115         dhcp_option_add "$cfg" "$networkid"
 116 }
 117
 118 dhcp_remoteid_add() {
 119         local cfg="$1"
 120
 121         config_get networkid "$cfg" networkid
 122         [ -n "$networkid" ] || return 0
 123
 124         config_get remoteid "$cfg" remoteid
 125         [ -n "$remoteid" ] || return 0
 126
 127         append args "--dhcp-remoteid=$networkid,$remoteid"
 128
 129         dhcp_option_add "$cfg" "$networkid"
 130 }
 131
 132 dhcp_circuitid_add() {
 133         local cfg="$1"
 134
 135         config_get networkid "$cfg" networkid
 136         [ -n "$networkid" ] || return 0
 137
 138         config_get circuitid "$cfg" circuitid
 139         [ -n "$circuitid" ] || return 0
 140
 141         append args "--dhcp-circuitid=$networkid,$circuitid"
 142
 143         dhcp_option_add "$cfg" "$networkid"
 144 }
 145
 146 dhcp_userclass_add() {
 147         local cfg="$1"
 148
 149         config_get networkid "$cfg" networkid
 150         [ -n "$networkid" ] || return 0
 151
 152         config_get userclass "$cfg" userclass
 153         [ -n "$userclass" ] || return 0
 154
 155         append args "--dhcp-userclass=$networkid,$userclass"
 156
 157         dhcp_option_add "$cfg" "$networkid"
 158 }
 159
 160 dhcp_vendorclass_add() {
 161         local cfg="$1"
 162
 163         config_get networkid "$cfg" networkid
 164         [ -n "$networkid" ] || return 0
 165
 166         config_get vendorclass "$cfg" vendorclass
 167         [ -n "$vendorclass" ] || return 0
 168
 169         append args "--dhcp-vendorclass=$networkid,$vendorclass"
 170
 171         dhcp_option_add "$cfg" "$networkid"
 172 }
 173
 174 dhcp_host_add() {
 175         local cfg="$1"
 176
 177         config_get name "$cfg" name
 178
 179         config_get networkid "$cfg" networkid
 180         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid"
 181
 182         config_get ip "$cfg" ip
 183         [ -n "$ip" ] || return 0
 184
 185         macs=""
 186         config_get mac "$cfg" mac
 187         for m in $mac; do append macs "$m" ","; done
 188         [ -n "$macs" ] || return 0
 189
 190         append args "--dhcp-host=$macs,${networkid:+net:$networkid,}$ip${name:+,$name}"
 191 }
 192
 193 dhcp_mac_add() {
 194         local cfg="$1"
 195
 196         config_get networkid "$cfg" networkid
 197         [ -n "$networkid" ] || return 0
 198
 199         config_get mac "$cfg" mac
 200         [ -n "$mac" ] || return 0
 201
 202         append args "--dhcp-mac=$networkid,$mac"
 203
 204         dhcp_option_add "$cfg" "$networkid"
 205 }
 206
 207 dhcp_boot_add() {
 208         local cfg="$1"
 209
 210         config_get networkid "$cfg" networkid
 211
 212         config_get filename "$cfg" filename
 213         [ -n "$filename" ] || return 0
 214
 215         config_get servername "$cfg" servername
 216         [ -n "$servername" ] || return 0
 217
 218         config_get serveraddress "$cfg" serveraddress
 219         [ -n "$serveraddress" ] || return 0
 220
 221         append args "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
 222
 223         dhcp_option_add "$cfg" "$networkid"
 224 }
 225
 226
 227 dhcp_add() {
 228         local cfg="$1"
 229         config_get net "$cfg" interface
 230         [ -n "$net" ] || return 0
 231
 232         config_get networkid "$cfg" networkid
 233         [ -n "$networkid" ] || networkid="$net"
 234
 235         config_get ifname "$net" ifname
 236         [ -n "$ifname" ] || return 0
 237
 238         config_get dnsserver "$net" dns
 239         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
 240                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 241         }
 242
 243         append_bool "$cfg" ignore "-2 '$ifname'" && return 0
 244
 245         config_get proto "$net" proto
 246         [ static = "$proto" ] || return 0
 247
 248         config_get ipaddr "$net" ipaddr
 249         config_get netmask "$cfg" netmask
 250         [ -n "$netmask" ] || config_get netmask "$net" netmask
 251
 252         #check for an already active dhcp server on the interface, unless 'force' is set
 253         config_get_bool force "$cfg" force 0
 254         [ "$force" -gt 0 ] || {
 255                 udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && return 0
 256         }
 257
 258         config_get start "$cfg" start
 259         config_get limit "$cfg" limit
 260         config_get leasetime "$cfg" leasetime
 261         config_get options "$cfg" options
 262         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 263
 264         leasetime="${leasetime:-12h}"
 265         start="$(dhcp_calc "${start:-100}")"
 266         limit="${limit:-150}"
 267         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 268         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 269         append args "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 270
 271         dhcp_option_add "$cfg" "$networkid"
 272 }
 273
 274 dhcp_option_add() {
 275         local cfg="$1"
 276         local networkid="$2"
 277
 278         config_get dhcp_option "$cfg" dhcp_option
 279         for o in $dhcp_option; do
 280                 append args "-O $networkid","$o"
 281         done
 282
 283 }
 284
 285 dhcp_domain_add() {
 286         local cfg="$1"
 287
 288         config_get name "$cfg" name
 289         [ -n "$name" ] || return 0
 290
 291         config_get ip "$cfg" ip
 292         [ -n "$ip" ] || return 0
 293
 294         local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
 295         append args "-A /$name${DOMAIN:+.$DOMAIN}/$ip"
 296         append args "--ptr-record=$4.$3.$2.$1.in-addr.arpa,$name${DOMAIN:+.$DOMAIN}"
 297 }
 298
 299 start() {
 300         include /lib/network
 301         scan_interfaces
 302         config_load dhcp
 303
 304         args=""
 305         config_foreach dnsmasq dnsmasq
 306         config_foreach dhcp_host_add host
 307         config_foreach dhcp_boot_add boot
 308         config_foreach dhcp_mac_add mac
 309         config_foreach dhcp_vendorclass_add vendorclass
 310         config_foreach dhcp_userclass_add userclass
 311         config_foreach dhcp_circuitid_add circuitid
 312         config_foreach dhcp_remoteid_add remoteid
 313         config_foreach dhcp_subscrid_add subscrid
 314         config_foreach dhcp_domain_add domain
 315         config_foreach dhcp_add dhcp
 316
 317         /usr/sbin/dnsmasq $args && {
 318                 rm -f /tmp/resolv.conf
 319                 [ -n "$DOMAIN" ] && echo "search $DOMAIN" >> /tmp/resolv.conf
 320                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 321                 for DNS_SERVER in $DNS_SERVERS ; do
 322                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 323                 done
 324         }
 325 }
 326
 327 stop() {
 328         [ -f /tmp/resolv.conf ] && {
 329                 rm -f /tmp/resolv.conf
 330                 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 331         }
 332         killall dnsmasq
 333         return 0
 334 }