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