base-files: split service related functions off to /lib/functions/service.sh
[openwrt/openwrt.git] / package / base-files-network / files / lib / network / config.sh
1 #!/bin/sh
2 # Copyright (C) 2006-2011 OpenWrt.org
3
4 # DEBUG="echo"
5
6 . /lib/functions/service.sh
7
8 do_sysctl() {
9 [ -n "$2" ] && \
10 sysctl -n -e -w "$1=$2" >/dev/null || \
11 sysctl -n -e "$1"
12 }
13
14 map_sysctls() {
15 local cfg="$1"
16 local ifn="$2"
17
18 local fam
19 for fam in ipv4 ipv6; do
20 if [ -d /proc/sys/net/$fam ]; then
21 local key
22 for key in /proc/sys/net/$fam/*/$ifn/*; do
23 local val
24 config_get val "$cfg" "${fam}_${key##*/}"
25 [ -n "$val" ] && echo -n "$val" > "$key"
26 done
27 fi
28 done
29 }
30
31 find_config() {
32 local iftype device iface ifaces ifn
33 for ifn in $interfaces; do
34 config_get iftype "$ifn" type
35 config_get iface "$ifn" ifname
36 case "$iftype" in
37 bridge) config_get ifaces "$ifn" ifnames;;
38 esac
39 config_get device "$ifn" device
40 for ifc in $device $iface $ifaces; do
41 [ ."$ifc" = ."$1" ] && {
42 echo "$ifn"
43 return 0
44 }
45 done
46 done
47
48 return 1;
49 }
50
51 scan_interfaces() {
52 local cfgfile="${1:-network}"
53 interfaces=
54 config_cb() {
55 case "$1" in
56 interface)
57 config_set "$2" auto 1
58 ;;
59 esac
60 local iftype ifname device proto
61 config_get iftype "$CONFIG_SECTION" TYPE
62 case "$iftype" in
63 interface)
64 append interfaces "$CONFIG_SECTION"
65 config_get proto "$CONFIG_SECTION" proto
66 config_get iftype "$CONFIG_SECTION" type
67 config_get ifname "$CONFIG_SECTION" ifname
68 config_get device "$CONFIG_SECTION" device "$ifname"
69 config_set "$CONFIG_SECTION" device "$device"
70 case "$iftype" in
71 bridge)
72 config_set "$CONFIG_SECTION" ifnames "$device"
73 config_set "$CONFIG_SECTION" ifname br-"$CONFIG_SECTION"
74 ;;
75 esac
76 ( type "scan_$proto" ) >/dev/null 2>/dev/null && eval "scan_$proto '$CONFIG_SECTION'"
77 ;;
78 esac
79 }
80 config_load "${cfgfile}"
81 }
82
83 add_vlan() {
84 local vif="${1%\.*}"
85
86 [ "$1" = "$vif" ] || ifconfig "$1" >/dev/null 2>/dev/null || {
87 ifconfig "$vif" up 2>/dev/null >/dev/null || add_vlan "$vif"
88 $DEBUG vconfig set_name_type DEV_PLUS_VID_NO_PAD
89 $DEBUG vconfig add "$vif" "${1##*\.}"
90 return 0
91 }
92 return 1
93 }
94
95 # add dns entries if they are not in resolv.conf yet
96 add_dns() {
97 local cfg="$1"; shift
98
99 remove_dns "$cfg"
100
101 # We may be called by pppd's ip-up which has a nonstandard umask set.
102 # Create an empty file here and force its permission to 0644, otherwise
103 # dnsmasq will not be able to re-read the resolv.conf.auto .
104 [ ! -f /tmp/resolv.conf.auto ] && {
105 touch /tmp/resolv.conf.auto
106 chmod 0644 /tmp/resolv.conf.auto
107 }
108
109 local dns
110 local add
111 for dns in "$@"; do
112 grep -qsE "^nameserver ${dns//./\\.}$" /tmp/resolv.conf.auto || {
113 add="${add:+$add }$dns"
114 echo "nameserver $dns" >> /tmp/resolv.conf.auto
115 }
116 done
117
118 [ -n "$cfg" ] && {
119 uci_toggle_state network "$cfg" dns "$add"
120 uci_toggle_state network "$cfg" resolv_dns "$add"
121 }
122 }
123
124 # remove dns entries of the given iface
125 remove_dns() {
126 local cfg="$1"
127
128 [ -n "$cfg" ] && {
129 [ -f /tmp/resolv.conf.auto ] && {
130 local dns=$(uci_get_state network "$cfg" resolv_dns)
131 for dns in $dns; do
132 sed -i -e "/^nameserver ${dns//./\\.}$/d" /tmp/resolv.conf.auto
133 done
134 }
135
136 uci_revert_state network "$cfg" dns
137 uci_revert_state network "$cfg" resolv_dns
138 }
139 }
140
141 # sort the device list, drop duplicates
142 sort_list() {
143 local arg="$*"
144 (
145 for item in $arg; do
146 echo "$item"
147 done
148 ) | sort -u
149 }
150
151 prepare_interface_bridge() {
152 return 0
153 }
154
155 # Create the interface, if necessary.
156 # Return status 0 indicates that the setup_interface() call should continue
157 # Return status 1 means that everything is set up already.
158
159 prepare_interface() {
160 local iface="$1"
161 local config="$2"
162 local macaddr="$3"
163
164 # if we're called for the bridge interface itself, don't bother trying
165 # to create any interfaces here. The scripts have already done that, otherwise
166 # the bridge interface wouldn't exist.
167 [ "br-$config" = "$iface" -o -e "$iface" ] && return 0;
168
169 ifconfig "$iface" 2>/dev/null >/dev/null && {
170 local proto
171 config_get proto "$config" proto
172
173 # make sure the interface is removed from any existing bridge and deconfigured,
174 # (deconfigured only if the interface is not set to proto=none)
175 unbridge "$iface"
176
177 local mtu macaddr txqueuelen
178 config_get mtu "$config" mtu
179 [ -n "$macaddr" ] || config_get macaddr "$config" macaddr
180 config_get txqueuelen "$config" txqueuelen
181 [ -n "$macaddr" ] && $DEBUG ifconfig "$iface" down
182 $DEBUG ifconfig "$iface" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} ${txqueuelen:+txqueuelen $txqueuelen} up
183
184 [ "$proto" = none ] || ifconfig "$iface" 0.0.0.0
185
186 # Apply sysctl settings
187 map_sysctls "$config" "$iface"
188 }
189
190 # Setup VLAN interfaces
191 add_vlan "$iface" && return 1
192 ifconfig "$iface" 2>/dev/null >/dev/null || return 0
193
194 # Setup bridging
195 local iftype
196 config_get iftype "$config" type
197 case "$iftype" in
198 bridge)
199 local macaddr
200 config_get macaddr "$config" macaddr
201 [ -x /usr/sbin/brctl ] && {
202 ifconfig "br-$config" 2>/dev/null >/dev/null && {
203 local newdevs devices
204 config_get devices "$config" device
205 for dev in $(sort_list "$devices" "$iface"); do
206 append newdevs "$dev"
207 done
208 uci_toggle_state network "$config" device "$newdevs"
209 $DEBUG ifconfig "$iface" 0.0.0.0
210 $DEBUG do_sysctl "net.ipv6.conf.$iface.disable_ipv6" 1
211 $DEBUG brctl addif "br-$config" "$iface"
212 # Bridge existed already. No further processing necesary
213 } || {
214 local stp igmp_snooping
215 config_get_bool stp "$config" stp 0
216 config_get_bool igmp_snooping "$config" igmp_snooping 1
217 $DEBUG brctl addbr "br-$config"
218 $DEBUG brctl setfd "br-$config" 0
219 $DEBUG ifconfig "$iface" 0.0.0.0
220 $DEBUG do_sysctl "net.ipv6.conf.$iface.disable_ipv6" 1
221 $DEBUG brctl addif "br-$config" "$iface"
222 $DEBUG brctl stp "br-$config" $stp
223 [ -z "$macaddr" ] && macaddr="$(cat /sys/class/net/$iface/address)"
224 [ -e /sys/devices/virtual/net/br-$config/bridge/multicast_snooping ] && \
225 echo $igmp_snooping > /sys/devices/virtual/net/br-$config/bridge/multicast_snooping
226 $DEBUG ifconfig "br-$config" hw ether $macaddr up
227 # Creating the bridge here will have triggered a hotplug event, which will
228 # result in another setup_interface() call, so we simply stop processing
229 # the current event at this point.
230 }
231 ifconfig "$iface" ${macaddr:+hw ether "${macaddr}"} up 2>/dev/null >/dev/null
232 return 1
233 }
234 ;;
235 esac
236 return 0
237 }
238
239 set_interface_ifname() {
240 local config="$1"
241 local ifname="$2"
242
243 local device
244 config_get device "$1" device
245 uci_toggle_state network "$config" ifname "$ifname"
246 uci_toggle_state network "$config" device "$device"
247 }
248
249 setup_interface_none() {
250 env -i ACTION="ifup" INTERFACE="$2" DEVICE="$1" PROTO=none /sbin/hotplug-call "iface" &
251 }
252
253 setup_interface_static() {
254 local iface="$1"
255 local config="$2"
256
257 local ipaddr netmask ip6addr
258 config_get ipaddr "$config" ipaddr
259 config_get netmask "$config" netmask
260 config_get ip6addr "$config" ip6addr
261 [ -z "$ipaddr" -o -z "$netmask" ] && [ -z "$ip6addr" ] && return 1
262
263 local gateway ip6gw dns bcast metric
264 config_get gateway "$config" gateway
265 config_get ip6gw "$config" ip6gw
266 config_get dns "$config" dns
267 config_get bcast "$config" broadcast
268 config_get metric "$config" metric
269
270 case "$ip6addr" in
271 */*) ;;
272 *:*) ip6addr="$ip6addr/64" ;;
273 esac
274
275 [ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask" broadcast "${bcast:-+}"
276 [ -z "$ip6addr" ] || $DEBUG ifconfig "${iface%:*}" add "$ip6addr"
277 [ -z "$gateway" ] || $DEBUG route add default gw "$gateway" ${metric:+metric $metric} dev "$iface"
278 [ -z "$ip6gw" ] || $DEBUG route -A inet6 add default gw "$ip6gw" ${metric:+metric $metric} dev "${iface%:*}"
279 [ -z "$dns" ] || add_dns "$config" $dns
280
281 config_get type "$config" TYPE
282 [ "$type" = "alias" ] && return 0
283
284 env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
285 }
286
287 setup_interface_alias() {
288 local config="$1"
289 local parent="$2"
290 local iface="$3"
291
292 local cfg
293 config_get cfg "$config" interface
294 [ "$parent" == "$cfg" ] || return 0
295
296 # parent device and ifname
297 local p_device p_type
298 config_get p_device "$cfg" device
299 config_get p_type "$cfg" type
300
301 # select alias ifname
302 local layer use_iface
303 config_get layer "$config" layer 2
304 case "$layer:$p_type" in
305 # layer 3: e.g. pppoe-wan or pptp-vpn
306 3:*) use_iface="$iface" ;;
307
308 # layer 2 and parent is bridge: e.g. br-wan
309 2:bridge) use_iface="br-$cfg" ;;
310
311 # layer 1: e.g. eth0 or ath0
312 *) use_iface="$p_device" ;;
313 esac
314
315 # alias counter
316 local ctr
317 config_get ctr "$parent" alias_count 0
318 ctr="$(($ctr + 1))"
319 config_set "$parent" alias_count "$ctr"
320
321 # alias list
322 local list
323 config_get list "$parent" aliases
324 append list "$config"
325 config_set "$parent" aliases "$list"
326
327 use_iface="$use_iface:$ctr"
328 set_interface_ifname "$config" "$use_iface"
329
330 local proto
331 config_get proto "$config" proto "static"
332 case "${proto}" in
333 static)
334 setup_interface_static "$use_iface" "$config"
335 ;;
336 *)
337 echo "Unsupported type '$proto' for alias config '$config'"
338 return 1
339 ;;
340 esac
341 }
342
343 setup_interface() {
344 local iface="$1"
345 local config="$2"
346 local proto="$3"
347 local vifmac="$4"
348
349 [ -n "$config" ] || {
350 config=$(find_config "$iface")
351 [ "$?" = 0 ] || return 1
352 }
353
354 prepare_interface "$iface" "$config" "$vifmac" || return 0
355
356 [ "$iface" = "br-$config" ] && {
357 # need to bring up the bridge and wait a second for
358 # it to switch to the 'forwarding' state, otherwise
359 # it will lose its routes...
360 ifconfig "$iface" up
361 sleep 1
362 }
363
364 # Interface settings
365 set_interface_ifname "$config" "$iface"
366
367 [ -n "$proto" ] || config_get proto "$config" proto
368 case "$proto" in
369 static)
370 setup_interface_static "$iface" "$config"
371 ;;
372 dhcp)
373 # kill running udhcpc instance
374 local pidfile="/var/run/dhcp-${iface}.pid"
375
376 SERVICE_PID_FILE="$pidfile" \
377 service_stop /sbin/udhcpc
378
379 local ipaddr netmask hostname proto1 clientid vendorid broadcast reqopts
380 config_get ipaddr "$config" ipaddr
381 config_get netmask "$config" netmask
382 config_get hostname "$config" hostname
383 config_get proto1 "$config" proto
384 config_get clientid "$config" clientid
385 config_get vendorid "$config" vendorid
386 config_get_bool broadcast "$config" broadcast 0
387 config_get reqopts "$config" reqopts
388
389 [ -z "$ipaddr" ] || \
390 $DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
391
392 # additional request options
393 local opt dhcpopts daemonize
394 for opt in $reqopts; do
395 append dhcpopts "-O $opt"
396 done
397
398 # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
399 [ "$proto1" != "$proto" ] && {
400 append dhcpopts "-n -q"
401 } || {
402 append dhcpopts "-O rootpath -R"
403 daemonize=1
404 }
405 [ "$broadcast" = 1 ] && broadcast="-O broadcast" || broadcast=
406
407 SERVICE_DAEMONIZE=$daemonize \
408 SERVICE_PID_FILE="$pidfile" \
409 service_start /sbin/udhcpc -t 0 -i "$iface" \
410 ${ipaddr:+-r $ipaddr} \
411 ${hostname:+-H $hostname} \
412 ${clientid:+-c $clientid} \
413 ${vendorid:+-V $vendorid} \
414 -b -p "$pidfile" $broadcast \
415 ${dhcpopts}
416 ;;
417 none)
418 setup_interface_none "$iface" "$config"
419 ;;
420 *)
421 if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
422 eval "setup_interface_$proto '$iface' '$config' '$proto'"
423 else
424 echo "Interface type $proto not supported."
425 return 1
426 fi
427 ;;
428 esac
429 }
430
431 stop_interface_dhcp() {
432 local config="$1"
433
434 local ifname
435 config_get ifname "$config" ifname
436
437 local lock="/var/lock/dhcp-${ifname}"
438 [ -f "$lock" ] && lock -u "$lock"
439
440 remove_dns "$config"
441
442 SERVICE_PID_FILE="/var/run/dhcp-${ifname}.pid" \
443 service_stop /sbin/udhcpc
444
445 uci -P /var/state revert "network.$config"
446 }
447
448 unbridge() {
449 local dev="$1"
450 local brdev
451
452 [ -x /usr/sbin/brctl ] || return 0
453 brctl show 2>/dev/null | grep "$dev" >/dev/null && {
454 # interface is still part of a bridge, correct that
455
456 for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
457 brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
458 do_sysctl "net.ipv6.conf.$dev.disable_ipv6" 0
459 done
460 }
461 }