[package] base-files: remove IPv6 LL addr from interfaces before adding them to a...
[openwrt/svn-archive/archive.git] / package / base-files / files / lib / network / config.sh
1 #!/bin/sh
2 # Copyright (C) 2006 OpenWrt.org
3
4 # DEBUG="echo"
5
6 find_config() {
7 local iftype device iface ifaces ifn
8 for ifn in $interfaces; do
9 config_get iftype "$ifn" type
10 config_get iface "$ifn" ifname
11 case "$iftype" in
12 bridge) config_get ifaces "$ifn" ifnames;;
13 esac
14 config_get device "$ifn" device
15 for ifc in $device $iface $ifaces; do
16 [ ."$ifc" = ."$1" ] && {
17 echo "$ifn"
18 return 0
19 }
20 done
21 done
22
23 return 1;
24 }
25
26 scan_interfaces() {
27 local cfgfile="${1:-network}"
28 interfaces=
29 config_cb() {
30 case "$1" in
31 interface)
32 config_set "$2" auto 1
33 ;;
34 esac
35 local iftype ifname device proto
36 config_get iftype "$CONFIG_SECTION" TYPE
37 case "$iftype" in
38 interface)
39 append interfaces "$CONFIG_SECTION"
40 config_get proto "$CONFIG_SECTION" proto
41 config_get iftype "$CONFIG_SECTION" type
42 config_get ifname "$CONFIG_SECTION" ifname
43 config_get device "$CONFIG_SECTION" device "$ifname"
44 config_set "$CONFIG_SECTION" device "$device"
45 case "$iftype" in
46 bridge)
47 config_set "$CONFIG_SECTION" ifnames "$device"
48 config_set "$CONFIG_SECTION" ifname br-"$CONFIG_SECTION"
49 ;;
50 esac
51 ( type "scan_$proto" ) >/dev/null 2>/dev/null && eval "scan_$proto '$CONFIG_SECTION'"
52 ;;
53 esac
54 }
55 config_load "${cfgfile}"
56 }
57
58 add_vlan() {
59 local vif="${1%\.*}"
60
61 [ "$1" = "$vif" ] || ifconfig "$1" >/dev/null 2>/dev/null || {
62 ifconfig "$vif" up 2>/dev/null >/dev/null || add_vlan "$vif"
63 $DEBUG vconfig add "$vif" "${1##*\.}"
64 return 0
65 }
66 return 1
67 }
68
69 # add dns entries if they are not in resolv.conf yet
70 add_dns() {
71 local cfg="$1"; shift
72
73 remove_dns "$cfg"
74
75 # We may be called by pppd's ip-up which has a nonstandard umask set.
76 # Create an empty file here and force its permission to 0644, otherwise
77 # dnsmasq will not be able to re-read the resolv.conf.auto .
78 [ ! -f /tmp/resolv.conf.auto ] && {
79 touch /tmp/resolv.conf.auto
80 chmod 0644 /tmp/resolv.conf.auto
81 }
82
83 local dns
84 local add
85 for dns in "$@"; do
86 grep -qsF "nameserver $dns" /tmp/resolv.conf.auto || {
87 add="${add:+$add }$dns"
88 echo "nameserver $dns" >> /tmp/resolv.conf.auto
89 }
90 done
91
92 [ -n "$cfg" ] && {
93 uci_set_state network "$cfg" dns "$add"
94 uci_set_state network "$cfg" resolv_dns "$add"
95 }
96 }
97
98 # remove dns entries of the given iface
99 remove_dns() {
100 local cfg="$1"
101
102 [ -n "$cfg" ] && {
103 [ -f /tmp/resolv.conf.auto ] && {
104 local dns=$(uci_get_state network "$cfg" resolv_dns)
105 for dns in $dns; do
106 sed -i -e "/^nameserver $dns$/d" /tmp/resolv.conf.auto
107 done
108 }
109
110 uci_revert_state network "$cfg" dns
111 uci_revert_state network "$cfg" resolv_dns
112 }
113 }
114
115 # sort the device list, drop duplicates
116 sort_list() {
117 local arg="$*"
118 (
119 for item in $arg; do
120 echo "$item"
121 done
122 ) | sort -u
123 }
124
125 # Create the interface, if necessary.
126 # Return status 0 indicates that the setup_interface() call should continue
127 # Return status 1 means that everything is set up already.
128
129 prepare_interface() {
130 local iface="$1"
131 local config="$2"
132 local vifmac="$3"
133
134 # if we're called for the bridge interface itself, don't bother trying
135 # to create any interfaces here. The scripts have already done that, otherwise
136 # the bridge interface wouldn't exist.
137 [ "br-$config" = "$iface" -o -e "$iface" ] && return 0;
138
139 ifconfig "$iface" 2>/dev/null >/dev/null && {
140 local proto
141 config_get proto "$config" proto
142
143 # make sure the interface is removed from any existing bridge and deconfigured,
144 # (deconfigured only if the interface is not set to proto=none)
145 unbridge "$iface"
146 [ "$proto" = none ] || ifconfig "$iface" 0.0.0.0
147
148 # Change interface MAC address if requested
149 [ -n "$vifmac" ] && {
150 ifconfig "$iface" down
151 ifconfig "$iface" hw ether "$vifmac" up
152 }
153 }
154
155 # Setup VLAN interfaces
156 add_vlan "$iface" && return 1
157 ifconfig "$iface" 2>/dev/null >/dev/null || return 0
158
159 # Setup bridging
160 local iftype
161 config_get iftype "$config" type
162 case "$iftype" in
163 bridge)
164 local macaddr
165 config_get macaddr "$config" macaddr
166 [ -x /usr/sbin/brctl ] && {
167 # Remove IPv6 link local addr before adding the iface to the bridge
168 local llv6="$(ifconfig "$iface")"
169 case "$llv6" in
170 *fe80:*/64*)
171 llv6="${llv6#* fe80:}"
172 ifconfig "$iface" del "fe80:${llv6%% *}"
173 ;;
174 esac
175
176 ifconfig "br-$config" 2>/dev/null >/dev/null && {
177 local newdevs devices
178 config_get devices "$config" device
179 for dev in $(sort_list "$devices" "$iface"); do
180 append newdevs "$dev"
181 done
182 uci_set_state network "$config" device "$newdevs"
183 $DEBUG ifconfig "$iface" 0.0.0.0
184 $DEBUG brctl addif "br-$config" "$iface"
185 # Bridge existed already. No further processing necesary
186 } || {
187 local stp
188 config_get_bool stp "$config" stp 0
189 $DEBUG brctl addbr "br-$config"
190 $DEBUG brctl setfd "br-$config" 0
191 $DEBUG ifconfig "br-$config" up
192 $DEBUG ifconfig "$iface" 0.0.0.0
193 $DEBUG brctl addif "br-$config" "$iface"
194 $DEBUG brctl stp "br-$config" $stp
195 # Creating the bridge here will have triggered a hotplug event, which will
196 # result in another setup_interface() call, so we simply stop processing
197 # the current event at this point.
198 }
199 ifconfig "$iface" ${macaddr:+hw ether "${macaddr}"} up 2>/dev/null >/dev/null
200 return 1
201 }
202 ;;
203 esac
204 return 0
205 }
206
207 set_interface_ifname() {
208 local config="$1"
209 local ifname="$2"
210
211 local device
212 config_get device "$1" device
213 uci_set_state network "$config" ifname "$ifname"
214 uci_set_state network "$config" device "$device"
215 }
216
217 setup_interface_none() {
218 env -i ACTION="ifup" INTERFACE="$2" DEVICE="$1" PROTO=none /sbin/hotplug-call "iface" &
219 }
220
221 setup_interface_static() {
222 local iface="$1"
223 local config="$2"
224
225 local ipaddr netmask ip6addr
226 config_get ipaddr "$config" ipaddr
227 config_get netmask "$config" netmask
228 config_get ip6addr "$config" ip6addr
229 [ -z "$ipaddr" -o -z "$netmask" ] && [ -z "$ip6addr" ] && return 1
230
231 local gateway ip6gw dns bcast
232 config_get gateway "$config" gateway
233 config_get ip6gw "$config" ip6gw
234 config_get dns "$config" dns
235 config_get bcast "$config" broadcast
236
237 [ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask" broadcast "${bcast:-+}"
238 [ -z "$ip6addr" ] || $DEBUG ifconfig "$iface" add "$ip6addr"
239 [ -z "$gateway" ] || $DEBUG route add default gw "$gateway" dev "$iface"
240 [ -z "$ip6gw" ] || $DEBUG route -A inet6 add default gw "$ip6gw" dev "$iface"
241 [ -z "$dns" ] || add_dns "$config" $dns
242
243 config_get type "$config" TYPE
244 [ "$type" = "alias" ] && return 0
245
246 env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
247 }
248
249 setup_interface_alias() {
250 local config="$1"
251 local parent="$2"
252 local iface="$3"
253
254 local cfg
255 config_get cfg "$config" interface
256 [ "$parent" == "$cfg" ] || return 0
257
258 # parent device and ifname
259 local p_device p_type
260 config_get p_device "$cfg" device
261 config_get p_type "$cfg" type
262
263 # select alias ifname
264 local layer use_iface
265 config_get layer "$config" layer 2
266 case "$layer:$p_type" in
267 # layer 3: e.g. pppoe-wan or pptp-vpn
268 3:*) use_iface="$iface" ;;
269
270 # layer 2 and parent is bridge: e.g. br-wan
271 2:bridge) use_iface="br-$cfg" ;;
272
273 # layer 1: e.g. eth0 or ath0
274 *) use_iface="$p_device" ;;
275 esac
276
277 # alias counter
278 local ctr
279 config_get ctr "$parent" alias_count 0
280 ctr="$(($ctr + 1))"
281 config_set "$parent" alias_count "$ctr"
282
283 # alias list
284 local list
285 config_get list "$parent" aliases
286 append list "$config"
287 config_set "$parent" aliases "$list"
288
289 use_iface="$use_iface:$ctr"
290 set_interface_ifname "$config" "$use_iface"
291
292 local proto
293 config_get proto "$config" proto "static"
294 case "${proto}" in
295 static)
296 setup_interface_static "$use_iface" "$config"
297 ;;
298 *)
299 echo "Unsupported type '$proto' for alias config '$config'"
300 return 1
301 ;;
302 esac
303 }
304
305 setup_interface() {
306 local iface="$1"
307 local config="$2"
308 local proto="$3"
309 local vifmac="$4"
310
311 [ -n "$config" ] || {
312 config=$(find_config "$iface")
313 [ "$?" = 0 ] || return 1
314 }
315
316 prepare_interface "$iface" "$config" "$vifmac" || return 0
317
318 [ "$iface" = "br-$config" ] && {
319 # need to bring up the bridge and wait a second for
320 # it to switch to the 'forwarding' state, otherwise
321 # it will lose its routes...
322 ifconfig "$iface" up
323 sleep 1
324 }
325
326 # Interface settings
327 grep "$iface:" /proc/net/dev > /dev/null && {
328 local mtu macaddr
329 config_get mtu "$config" mtu
330 config_get macaddr "$config" macaddr
331 [ -n "$macaddr" ] && $DEBUG ifconfig "$iface" down
332 $DEBUG ifconfig "$iface" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} up
333 }
334 set_interface_ifname "$config" "$iface"
335
336 [ -n "$proto" ] || config_get proto "$config" proto
337 case "$proto" in
338 static)
339 setup_interface_static "$iface" "$config"
340 ;;
341 dhcp)
342 local lockfile="/var/lock/dhcp-$iface"
343 lock "$lockfile"
344
345 # prevent udhcpc from starting more than once
346 local pidfile="/var/run/dhcp-${iface}.pid"
347 local pid="$(cat "$pidfile" 2>/dev/null)"
348 if [ -d "/proc/$pid" ] && grep -qs udhcpc "/proc/${pid}/cmdline"; then
349 lock -u "$lockfile"
350 else
351 local ipaddr netmask hostname proto1 clientid
352 config_get ipaddr "$config" ipaddr
353 config_get netmask "$config" netmask
354 config_get hostname "$config" hostname
355 config_get proto1 "$config" proto
356 config_get clientid "$config" clientid
357
358 [ -z "$ipaddr" ] || \
359 $DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
360
361 # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
362 local dhcpopts
363 [ ."$proto1" != ."$proto" ] && dhcpopts="-n -q"
364 $DEBUG eval udhcpc -t 0 -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} ${clientid:+-c $clientid} -b -p "$pidfile" ${dhcpopts:- -O rootpath -R &}
365 lock -u "$lockfile"
366 fi
367 ;;
368 none)
369 setup_interface_none "$iface" "$config"
370 ;;
371 *)
372 if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
373 eval "setup_interface_$proto '$iface' '$config' '$proto'"
374 else
375 echo "Interface type $proto not supported."
376 return 1
377 fi
378 ;;
379 esac
380 }
381
382 stop_interface_dhcp() {
383 local config="$1"
384
385 local ifname
386 config_get ifname "$config" ifname
387
388 local lock="/var/lock/dhcp-${ifname}"
389 [ -f "$lock" ] && lock -u "$lock"
390
391 remove_dns "$config"
392
393 local pidfile="/var/run/dhcp-${ifname}.pid"
394 local pid="$(cat "$pidfile" 2>/dev/null)"
395 [ -d "/proc/$pid" ] && {
396 grep -qs udhcpc "/proc/$pid/cmdline" && kill -TERM $pid && \
397 while grep -qs udhcpc "/proc/$pid/cmdline"; do sleep 1; done
398 rm -f "$pidfile"
399 }
400
401 uci -P /var/state revert "network.$config"
402 }
403
404 unbridge() {
405 local dev="$1"
406 local brdev
407
408 [ -x /usr/sbin/brctl ] || return 0
409 brctl show 2>/dev/null | grep "$dev" >/dev/null && {
410 # interface is still part of a bridge, correct that
411
412 for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
413 brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
414 done
415 }
416 }