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 append_server() {
  40         append args "-S $1"
  41 }
  42
  43 dnsmasq() {
  44         local cfg="$1"
  45         append_bool "$cfg" authoritative "-K"
  46         append_bool "$cfg" nodaemon "-d"
  47         append_bool "$cfg" domainneeded "-D"
  48         append_bool "$cfg" filterwin2k "-f"
  49         append_bool "$cfg" nohosts "-h"
  50         append_bool "$cfg" nonegcache "-N"
  51         append_bool "$cfg" strictorder "-o"
  52         append_bool "$cfg" logqueries "-q"
  53         append_bool "$cfg" noresolv "-R"
  54         append_bool "$cfg" localise_queries "-y"
  55         append_bool "$cfg" readethers "-Z"
  56         append_bool "$cfg" dbus "-1"
  57         append_bool "$cfg" boguspriv "-b"
  58         append_bool "$cfg" expandhosts "-E"
  59         append_bool "$cfg" enable_tftp "--enable-tftp"
  60         append_bool "$cfg" nonwildcard "-z"
  61
  62         append_parm "$cfg" dnsforwardmax "-0"
  63         append_parm "$cfg" port "-p"
  64         append_parm "$cfg" ednspacket_max "-P"
  65         append_parm "$cfg" dhcpleasemax "-X"
  66         append_parm "$cfg" "addnhosts" "-H"
  67         append_parm "$cfg" "queryport" "-Q"
  68         append_parm "$cfg" "domain" "-s"
  69         append_parm "$cfg" "local" "-S"
  70         config_list_foreach "$cfg" "server" append_server
  71         append_parm "$cfg" "leasefile" "-l"
  72         append_parm "$cfg" "resolvfile" "-r"
  73         append_parm "$cfg" "tftp_root" "--tftp-root"
  74         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
  75         append_parm "$cfg" "interfaces" "-i"
  76
  77         config_get leasefile $cfg leasefile
  78         [ -e "$leasefile" ] || touch "$leasefile"
  79         config_get_bool cachelocal "$cfg" cachelocal 1
  80 }
  81
  82 dhcp_subscrid_add() {
  83         local cfg="$1"
  84
  85         config_get name "$cfg" name
  86         [ -n "$name" ] || return 0
  87
  88         config_get subscriberid "$cfg" subscriberid
  89         [ -n "$subscriberid" ] || return 0
  90
  91         append args "--dhcp-subscrid=$name,$subscriberid"
  92
  93         dhcp_option_add "$cfg" "$name"
  94 }
  95
  96 dhcp_remoteid_add() {
  97         local cfg="$1"
  98
  99         config_get name "$cfg" name
 100         [ -n "$name" ] || return 0
 101
 102         config_get remoteid "$cfg" remoteid
 103         [ -n "$remoteid" ] || return 0
 104
 105         append args "--dhcp-remoteid=$name,$remoteid"
 106
 107         dhcp_option_add "$cfg" "$name"
 108 }
 109
 110 dhcp_circuitid_add() {
 111         local cfg="$1"
 112
 113         config_get name "$cfg" name
 114         [ -n "$name" ] || return 0
 115
 116         config_get circuitid "$cfg" circuitid
 117         [ -n "$circuitid" ] || return 0
 118
 119         append args "--dhcp-circuitid=$name,$circuitid"
 120
 121         dhcp_option_add "$cfg" "$name"
 122 }
 123
 124 dhcp_userclass_add() {
 125         local cfg="$1"
 126
 127         config_get name "$cfg" name
 128         [ -n "$name" ] || return 0
 129
 130         config_get userclass "$cfg" userclass
 131         [ -n "$userclass" ] || return 0
 132
 133         append args "--dhcp-userclass=$name,$userclass"
 134
 135         dhcp_option_add "$cfg" "$name"
 136 }
 137
 138 dhcp_vendorclass_add() {
 139         local cfg="$1"
 140
 141         config_get name "$cfg" name
 142         [ -n "$name" ] || return 0
 143
 144         config_get vendorclass "$cfg" vendorclass
 145         [ -n "$vendorclass" ] || return 0
 146
 147         append args "--dhcp-vendorclass=$name,$vendorclass"
 148
 149         dhcp_option_add "$cfg" "$name"
 150 }
 151
 152 dhcp_host_add() {
 153         local cfg="$1"
 154
 155         config_get name "$cfg" name
 156         [ -n "$name" ] || return 0
 157
 158         config_get mac "$cfg" mac
 159         [ -n "$mac" ] || return 0
 160
 161         config_get ip "$cfg" ip
 162         [ -n "$ip" ] || return 0
 163
 164         append args "--dhcp-host=$mac,$ip"
 165
 166         dhcp_option_add "$cfg" "$name"
 167 }
 168
 169 dhcp_mac_add() {
 170         local cfg="$1"
 171
 172         config_get name "$cfg" name
 173         [ -n "$name" ] || return 0
 174
 175         config_get mac "$cfg" mac
 176         [ -n "$mac" ] || return 0
 177
 178         append args "--dhcp-mac=$name,$mac"
 179
 180         dhcp_option_add "$cfg" "$name"
 181 }
 182
 183 dhcp_boot_add() {
 184         local cfg="$1"
 185
 186         config_get name "$cfg" name
 187
 188         config_get filename "$cfg" filename
 189         [ -n "$filename" ] || return 0
 190
 191         config_get servername "$cfg" servername
 192         [ -n "$servername" ] || return 0
 193
 194         config_get serveraddress "$cfg" serveraddress
 195         [ -n "$serveraddress" ] || return 0
 196
 197         append args "--dhcp-boot=${name:+net:$name,}$filename,$servername,$serveraddress"
 198
 199         dhcp_option_add "$cfg" "$name"
 200 }
 201
 202
 203 dhcp_add() {
 204         local cfg="$1"
 205         config_get net "$cfg" interface
 206         [ -n "$net" ] || return 0
 207
 208         config_get name "$cfg" name
 209         [ -n "$name" ] || name="$net"
 210
 211         config_get ifname "$net" ifname
 212         [ -n "$ifname" ] || return 0
 213
 214         config_get dnsserver "$net" dns
 215         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
 216                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 217         }
 218
 219         append_bool "$cfg" ignore "-2 $ifname"
 220
 221         config_get proto "$net" proto
 222         [ static = "$proto" ] || return 0
 223
 224         config_get ipaddr "$net" ipaddr
 225         config_get netmask "$cfg" netmask
 226         [ -n "$netmask" ] || config_get netmask "$net" netmask
 227
 228         #check for an already active dhcp server on the interface, unless 'force' is set
 229         config_get_bool force "$cfg" force 0
 230         [ "$force" -gt 0 ] || {
 231                 udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && return 0
 232         }
 233
 234         config_get start "$cfg" start
 235         config_get limit "$cfg" limit
 236         config_get leasetime "$cfg" leasetime
 237         config_get options "$cfg" options
 238         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 239
 240         leasetime="${leasetime:-12h}"
 241         start="$(dhcp_calc "${start:-100}")"
 242         limit="$((${limit:-150} + 1))"
 243         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 244         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 245         append args "--dhcp-range=$name,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 246
 247         dhcp_option_add "$cfg" "$name"
 248 }
 249
 250 dhcp_option_add() {
 251         local cfg="$1"
 252         local name="$2"
 253
 254         config_get dhcp_option "$cfg" dhcp_option
 255         for o in $dhcp_option; do
 256                 append args "-O $name","$o"
 257         done
 258
 259 }
 260
 261 start() {
 262         include /lib/network
 263         scan_interfaces
 264         config_load dhcp
 265
 266         args=""
 267         config_foreach dnsmasq dnsmasq
 268         config_foreach dhcp_host_add host
 269         config_foreach dhcp_boot_add boot
 270         config_foreach dhcp_mac_add mac
 271         config_foreach dhcp_vendorclass_add vendorclass
 272         config_foreach dhcp_userclass_add userclass
 273         config_foreach dhcp_circuitid_add circuitid
 274         config_foreach dhcp_remoteid_add remoteid
 275         config_foreach dhcp_subscrid_add subscrid
 276         config_foreach dhcp_add dhcp
 277
 278         /usr/sbin/dnsmasq $args && {
 279                 rm -f /tmp/resolv.conf
 280                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 281                 for DNS_SERVER in $DNS_SERVERS ; do
 282                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 283                 done
 284         }
 285 }
 286
 287 stop() {
 288         [ -f /tmp/resolv.conf ] && {
 289                 rm -f /tmp/resolv.conf
 290                 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 291         }
 292         killall dnsmasq
 293         return 0
 294 }