| 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" 0 |
| 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 $1" |
| 42 | } |
| 43 | |
| 44 | append_interface() { |
| 45 | local ifname=$(uci_get_state network "$1" ifname "$1") |
| 46 | append args "-i $ifname" |
| 47 | } |
| 48 | |
| 49 | append_notinterface() { |
| 50 | local ifname=$(uci_get_state network "$1" ifname "$1") |
| 51 | append args "-I $ifname" |
| 52 | } |
| 53 | |
| 54 | append_addnhosts() { |
| 55 | append args "-H $1" |
| 56 | } |
| 57 | |
| 58 | append_bogusnxdomain() { |
| 59 | append args "-B $1" |
| 60 | } |
| 61 | |
| 62 | dnsmasq() { |
| 63 | local cfg="$1" |
| 64 | append_bool "$cfg" authoritative "-K" |
| 65 | append_bool "$cfg" nodaemon "-d" |
| 66 | append_bool "$cfg" domainneeded "-D" |
| 67 | append_bool "$cfg" filterwin2k "-f" |
| 68 | append_bool "$cfg" nohosts "-h" |
| 69 | append_bool "$cfg" nonegcache "-N" |
| 70 | append_bool "$cfg" strictorder "-o" |
| 71 | append_bool "$cfg" logqueries "-q" |
| 72 | append_bool "$cfg" noresolv "-R" |
| 73 | append_bool "$cfg" localise_queries "-y" |
| 74 | append_bool "$cfg" readethers "-Z" |
| 75 | append_bool "$cfg" dbus "-1" |
| 76 | append_bool "$cfg" boguspriv "-b" |
| 77 | append_bool "$cfg" expandhosts "-E" |
| 78 | append_bool "$cfg" enable_tftp "--enable-tftp" |
| 79 | append_bool "$cfg" nonwildcard "-z" |
| 80 | |
| 81 | append_parm "$cfg" dhcpscript "-6" |
| 82 | append_parm "$cfg" cachesize "-c" |
| 83 | append_parm "$cfg" dnsforwardmax "-0" |
| 84 | append_parm "$cfg" port "-p" |
| 85 | append_parm "$cfg" ednspacket_max "-P" |
| 86 | append_parm "$cfg" dhcpleasemax "-X" |
| 87 | append_parm "$cfg" "queryport" "-Q" |
| 88 | append_parm "$cfg" "domain" "-s" |
| 89 | append_parm "$cfg" "local" "-S" |
| 90 | config_list_foreach "$cfg" "server" append_server |
| 91 | config_list_foreach "$cfg" "interface" append_interface |
| 92 | config_list_foreach "$cfg" "notinterface" append_notinterface |
| 93 | config_list_foreach "$cfg" "addnhosts" append_addnhosts |
| 94 | config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain |
| 95 | append_parm "$cfg" "leasefile" "-l" |
| 96 | append_parm "$cfg" "resolvfile" "-r" |
| 97 | append_parm "$cfg" "tftp_root" "--tftp-root" |
| 98 | append_parm "$cfg" "dhcp_boot" "--dhcp-boot" |
| 99 | |
| 100 | config_get DOMAIN "$cfg" domain |
| 101 | |
| 102 | config_get_bool readethers "$cfg" readethers |
| 103 | [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers |
| 104 | |
| 105 | config_get leasefile $cfg leasefile |
| 106 | [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile" |
| 107 | config_get_bool cachelocal "$cfg" cachelocal 1 |
| 108 | |
| 109 | config_get hostsfile "$cfg" dhcphostsfile |
| 110 | [ -e "$hostsfile" ] && append args "--dhcp-hostsfile=$hostsfile" |
| 111 | |
| 112 | local rebind |
| 113 | config_get_bool rebind "$cfg" rebind_protection 1 |
| 114 | [ $rebind -gt 0 ] && { |
| 115 | logger -t dnsmasq \ |
| 116 | "DNS rebinding protection is active," \ |
| 117 | "will discard upstream RFC1918 responses!" |
| 118 | append args "--stop-dns-rebind" |
| 119 | |
| 120 | local rebind_localhost |
| 121 | config_get_bool rebind_localhost "$cfg" rebind_localhost 0 |
| 122 | [ $rebind_localhost -gt 0 ] && { |
| 123 | logger -t dnsmasq "Allowing 127.0.0.0/8 responses" |
| 124 | append args "--rebind-localhost-ok" |
| 125 | } |
| 126 | |
| 127 | append_rebind_domain() { |
| 128 | logger -t dnsmasq "Allowing RFC1918 responses for domain $1" |
| 129 | append args "--rebind-domain-ok=$1" |
| 130 | } |
| 131 | |
| 132 | config_list_foreach "$cfg" rebind_domain append_rebind_domain |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | dhcp_subscrid_add() { |
| 137 | local cfg="$1" |
| 138 | |
| 139 | config_get networkid "$cfg" networkid |
| 140 | [ -n "$networkid" ] || return 0 |
| 141 | |
| 142 | config_get subscriberid "$cfg" subscriberid |
| 143 | [ -n "$subscriberid" ] || return 0 |
| 144 | |
| 145 | append args "--dhcp-subscrid=$networkid,$subscriberid" |
| 146 | |
| 147 | dhcp_option_add "$cfg" "$networkid" |
| 148 | } |
| 149 | |
| 150 | dhcp_remoteid_add() { |
| 151 | local cfg="$1" |
| 152 | |
| 153 | config_get networkid "$cfg" networkid |
| 154 | [ -n "$networkid" ] || return 0 |
| 155 | |
| 156 | config_get remoteid "$cfg" remoteid |
| 157 | [ -n "$remoteid" ] || return 0 |
| 158 | |
| 159 | append args "--dhcp-remoteid=$networkid,$remoteid" |
| 160 | |
| 161 | dhcp_option_add "$cfg" "$networkid" |
| 162 | } |
| 163 | |
| 164 | dhcp_circuitid_add() { |
| 165 | local cfg="$1" |
| 166 | |
| 167 | config_get networkid "$cfg" networkid |
| 168 | [ -n "$networkid" ] || return 0 |
| 169 | |
| 170 | config_get circuitid "$cfg" circuitid |
| 171 | [ -n "$circuitid" ] || return 0 |
| 172 | |
| 173 | append args "--dhcp-circuitid=$networkid,$circuitid" |
| 174 | |
| 175 | dhcp_option_add "$cfg" "$networkid" |
| 176 | } |
| 177 | |
| 178 | dhcp_userclass_add() { |
| 179 | local cfg="$1" |
| 180 | |
| 181 | config_get networkid "$cfg" networkid |
| 182 | [ -n "$networkid" ] || return 0 |
| 183 | |
| 184 | config_get userclass "$cfg" userclass |
| 185 | [ -n "$userclass" ] || return 0 |
| 186 | |
| 187 | append args "--dhcp-userclass=$networkid,$userclass" |
| 188 | |
| 189 | dhcp_option_add "$cfg" "$networkid" |
| 190 | } |
| 191 | |
| 192 | dhcp_vendorclass_add() { |
| 193 | local cfg="$1" |
| 194 | |
| 195 | config_get networkid "$cfg" networkid |
| 196 | [ -n "$networkid" ] || return 0 |
| 197 | |
| 198 | config_get vendorclass "$cfg" vendorclass |
| 199 | [ -n "$vendorclass" ] || return 0 |
| 200 | |
| 201 | append args "--dhcp-vendorclass=$networkid,$vendorclass" |
| 202 | |
| 203 | dhcp_option_add "$cfg" "$networkid" |
| 204 | } |
| 205 | |
| 206 | dhcp_host_add() { |
| 207 | local cfg="$1" |
| 208 | |
| 209 | config_get networkid "$cfg" networkid |
| 210 | [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" |
| 211 | |
| 212 | config_get name "$cfg" name |
| 213 | config_get ip "$cfg" ip |
| 214 | [ -n "$ip" ] || [ -n "$name" ] || return 0 |
| 215 | |
| 216 | macs="" |
| 217 | config_get mac "$cfg" mac |
| 218 | for m in $mac; do append macs "$m" ","; done |
| 219 | [ -n "$macs" ] || return 0 |
| 220 | |
| 221 | append args "--dhcp-host=$macs${networkid:+,net:$networkid}${ip:+,$ip}${name:+,$name}" |
| 222 | } |
| 223 | |
| 224 | dhcp_mac_add() { |
| 225 | local cfg="$1" |
| 226 | |
| 227 | config_get networkid "$cfg" networkid |
| 228 | [ -n "$networkid" ] || return 0 |
| 229 | |
| 230 | config_get mac "$cfg" mac |
| 231 | [ -n "$mac" ] || return 0 |
| 232 | |
| 233 | append args "--dhcp-mac=$networkid,$mac" |
| 234 | |
| 235 | dhcp_option_add "$cfg" "$networkid" |
| 236 | } |
| 237 | |
| 238 | dhcp_boot_add() { |
| 239 | local cfg="$1" |
| 240 | |
| 241 | config_get networkid "$cfg" networkid |
| 242 | |
| 243 | config_get filename "$cfg" filename |
| 244 | [ -n "$filename" ] || return 0 |
| 245 | |
| 246 | config_get servername "$cfg" servername |
| 247 | [ -n "$servername" ] || return 0 |
| 248 | |
| 249 | config_get serveraddress "$cfg" serveraddress |
| 250 | [ -n "$serveraddress" ] || return 0 |
| 251 | |
| 252 | append args "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress" |
| 253 | |
| 254 | dhcp_option_add "$cfg" "$networkid" |
| 255 | } |
| 256 | |
| 257 | |
| 258 | dhcp_add() { |
| 259 | local cfg="$1" |
| 260 | config_get net "$cfg" interface |
| 261 | [ -n "$net" ] || return 0 |
| 262 | |
| 263 | config_get networkid "$cfg" networkid |
| 264 | [ -n "$networkid" ] || networkid="$net" |
| 265 | |
| 266 | config_get ifname "$net" ifname |
| 267 | [ -n "$ifname" ] || return 0 |
| 268 | |
| 269 | config_get dnsserver "$net" dns |
| 270 | [ "$cachelocal" = "0" -a -n "$dnsserver" ] && { |
| 271 | DNS_SERVERS="$DNS_SERVERS $dnsserver" |
| 272 | } |
| 273 | |
| 274 | append_bool "$cfg" ignore "-2 $ifname" && return 0 |
| 275 | |
| 276 | config_get proto "$net" proto |
| 277 | [ static = "$proto" ] || return 0 |
| 278 | |
| 279 | config_get ipaddr "$net" ipaddr |
| 280 | config_get netmask "$cfg" netmask |
| 281 | [ -n "$netmask" ] || config_get netmask "$net" netmask |
| 282 | |
| 283 | #check for an already active dhcp server on the interface, unless 'force' is set |
| 284 | config_get_bool force "$cfg" force 0 |
| 285 | [ $force -gt 0 ] || { |
| 286 | udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && { |
| 287 | logger -t dnsmasq \ |
| 288 | "found already running DHCP-server on interface '$ifname'" \ |
| 289 | "refusing to start, use 'option force 1' to override" |
| 290 | return 0 |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | config_get start "$cfg" start |
| 295 | config_get limit "$cfg" limit |
| 296 | config_get leasetime "$cfg" leasetime |
| 297 | config_get options "$cfg" options |
| 298 | config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1 |
| 299 | |
| 300 | leasetime="${leasetime:-12h}" |
| 301 | start="$(dhcp_calc "${start:-100}")" |
| 302 | limit="${limit:-150}" |
| 303 | [ "$limit" -gt 0 ] && limit=$((limit-1)) |
| 304 | eval "$(ipcalc.sh $ipaddr $netmask $start $limit)" |
| 305 | if [ "$dynamicdhcp" = "0" ]; then END="static"; fi |
| 306 | append args "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}" |
| 307 | |
| 308 | dhcp_option_add "$cfg" "$networkid" |
| 309 | } |
| 310 | |
| 311 | dhcp_option_add() { |
| 312 | local cfg="$1" |
| 313 | local networkid="$2" |
| 314 | |
| 315 | config_get dhcp_option "$cfg" dhcp_option |
| 316 | for o in $dhcp_option; do |
| 317 | append args "-O $networkid","$o" |
| 318 | done |
| 319 | |
| 320 | } |
| 321 | |
| 322 | dhcp_domain_add() { |
| 323 | local cfg="$1" |
| 324 | local ip name names |
| 325 | |
| 326 | config_get names "$cfg" name |
| 327 | [ -n "$names" ] || return 0 |
| 328 | |
| 329 | config_get ip "$cfg" ip |
| 330 | [ -n "$ip" ] || return 0 |
| 331 | |
| 332 | local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS" |
| 333 | local raddr="${4:+$4.$3.$2.$1.in-addr.arpa}" |
| 334 | |
| 335 | for name in $names; do |
| 336 | local fqdn="$name" |
| 337 | |
| 338 | [ "${fqdn%.*}" == "$fqdn" ] && \ |
| 339 | fqdn="$fqdn${DOMAIN:+.$DOMAIN}" |
| 340 | |
| 341 | append args "-A /$fqdn/$ip" |
| 342 | |
| 343 | [ -n "$raddr" ] && { |
| 344 | append args "--ptr-record=$raddr,$fqdn" |
| 345 | raddr="" |
| 346 | } |
| 347 | done |
| 348 | } |
| 349 | |
| 350 | dhcp_srv_add() { |
| 351 | local cfg="$1" |
| 352 | |
| 353 | config_get srv "$cfg" srv |
| 354 | [ -n "$srv" ] || return 0 |
| 355 | |
| 356 | config_get target "$cfg" target |
| 357 | [ -n "$target" ] || return 0 |
| 358 | |
| 359 | config_get port "$cfg" port |
| 360 | |
| 361 | local service="$srv,$target" |
| 362 | [ -n "$port" ] && service="$service,$port" |
| 363 | |
| 364 | append args "-W $service" |
| 365 | } |
| 366 | |
| 367 | start() { |
| 368 | include /lib/network |
| 369 | scan_interfaces |
| 370 | config_load dhcp |
| 371 | |
| 372 | args="" |
| 373 | config_foreach dnsmasq dnsmasq |
| 374 | config_foreach dhcp_host_add host |
| 375 | config_foreach dhcp_boot_add boot |
| 376 | config_foreach dhcp_mac_add mac |
| 377 | config_foreach dhcp_vendorclass_add vendorclass |
| 378 | config_foreach dhcp_userclass_add userclass |
| 379 | config_foreach dhcp_circuitid_add circuitid |
| 380 | config_foreach dhcp_remoteid_add remoteid |
| 381 | config_foreach dhcp_subscrid_add subscrid |
| 382 | config_foreach dhcp_domain_add domain |
| 383 | config_foreach dhcp_srv_add srvhost |
| 384 | config_foreach dhcp_add dhcp |
| 385 | |
| 386 | /usr/sbin/dnsmasq $args && { |
| 387 | rm -f /tmp/resolv.conf |
| 388 | [ -n "$DOMAIN" ] && echo "search $DOMAIN" >> /tmp/resolv.conf |
| 389 | DNS_SERVERS="$DNS_SERVERS 127.0.0.1" |
| 390 | for DNS_SERVER in $DNS_SERVERS ; do |
| 391 | echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf |
| 392 | done |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | stop() { |
| 397 | [ -f /tmp/resolv.conf ] && { |
| 398 | rm -f /tmp/resolv.conf |
| 399 | ln -s /tmp/resolv.conf.auto /tmp/resolv.conf |
| 400 | } |
| 401 | service_kill dnsmasq /var/run/dnsmasq.pid |
| 402 | return 0 |
| 403 | } |
| 404 | |
