base-files: bring bridge port iface down before changing the mac (#7111)
[openwrt/staging/chunkeey.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="$1"; shift
72
73 local dns
74 local add
75 for dns in "$@"; do
76 grep -qsF "nameserver $dns" /tmp/resolv.conf.auto || {
77 add="${add:+$add }$dns"
78 echo "nameserver $dns" >> /tmp/resolv.conf.auto
79 }
80 done
81
82 uci_set_state network "$cfg" dns "$add"
83 }
84
85 # remove dns entries of the given iface
86 remove_dns() {
87 local cfg="$1"
88
89 local dns
90 config_get dns "$cfg" dns
91 for dns in $dns; do
92 sed -i -e "/^nameserver $dns$/d" /tmp/resolv.conf.auto
93 done
94
95 uci_revert_state network "$cfg" dns
96 }
97
98 # sort the device list, drop duplicates
99 sort_list() {
100 local arg="$*"
101 (
102 for item in $arg; do
103 echo "$item"
104 done
105 ) | sort -u
106 }
107
108 # Create the interface, if necessary.
109 # Return status 0 indicates that the setup_interface() call should continue
110 # Return status 1 means that everything is set up already.
111
112 prepare_interface() {
113 local iface="$1"
114 local config="$2"
115 local vifmac="$3"
116
117 # if we're called for the bridge interface itself, don't bother trying
118 # to create any interfaces here. The scripts have already done that, otherwise
119 # the bridge interface wouldn't exist.
120 [ "br-$config" = "$iface" -o -e "$iface" ] && return 0;
121
122 ifconfig "$iface" 2>/dev/null >/dev/null && {
123 local proto
124 config_get proto "$config" proto
125
126 # make sure the interface is removed from any existing bridge and deconfigured,
127 # (deconfigured only if the interface is not set to proto=none)
128 unbridge "$iface"
129 [ "$proto" = none ] || ifconfig "$iface" 0.0.0.0
130
131 # Change interface MAC address if requested
132 [ -n "$vifmac" ] && {
133 ifconfig "$iface" down
134 ifconfig "$iface" hw ether "$vifmac" up
135 }
136 }
137
138 # Setup VLAN interfaces
139 add_vlan "$iface" && return 1
140 ifconfig "$iface" 2>/dev/null >/dev/null || return 0
141
142 # Setup bridging
143 local iftype
144 config_get iftype "$config" type
145 case "$iftype" in
146 bridge)
147 local macaddr
148 config_get macaddr "$config" macaddr
149 [ -x /usr/sbin/brctl ] && {
150 ifconfig "br-$config" 2>/dev/null >/dev/null && {
151 local newdevs devices
152 config_get devices "$config" device
153 for dev in $(sort_list "$devices" "$iface"); do
154 append newdevs "$dev"
155 done
156 uci_set_state network "$config" device "$newdevs"
157 $DEBUG ifconfig "$iface" 0.0.0.0
158 $DEBUG brctl addif "br-$config" "$iface"
159 # Bridge existed already. No further processing necesary
160 } || {
161 local stp
162 config_get_bool stp "$config" stp 0
163 $DEBUG brctl addbr "br-$config"
164 $DEBUG brctl setfd "br-$config" 0
165 $DEBUG ifconfig "br-$config" up
166 $DEBUG ifconfig "$iface" 0.0.0.0
167 $DEBUG brctl addif "br-$config" "$iface"
168 $DEBUG brctl stp "br-$config" $stp
169 # Creating the bridge here will have triggered a hotplug event, which will
170 # result in another setup_interface() call, so we simply stop processing
171 # the current event at this point.
172 }
173
174 [ -n "$macaddr" ] && ifconfig "$iface" down 2>/dev/null >/dev/null
175 ifconfig "$iface" ${macaddr:+hw ether "${macaddr}"} up 2>/dev/null >/dev/null
176 return 1
177 }
178 ;;
179 esac
180 return 0
181 }
182
183 set_interface_ifname() {
184 local config="$1"
185 local ifname="$2"
186
187 local device
188 config_get device "$1" device
189 uci_set_state network "$config" ifname "$ifname"
190 uci_set_state network "$config" device "$device"
191 }
192
193 setup_interface_none() {
194 env -i ACTION="ifup" INTERFACE="$2" DEVICE="$1" PROTO=none /sbin/hotplug-call "iface" &
195 }
196
197 setup_interface_static() {
198 local iface="$1"
199 local config="$2"
200
201 local ipaddr netmask ip6addr
202 config_get ipaddr "$config" ipaddr
203 config_get netmask "$config" netmask
204 config_get ip6addr "$config" ip6addr
205 [ -z "$ipaddr" -o -z "$netmask" ] && [ -z "$ip6addr" ] && return 1
206
207 local gateway ip6gw dns bcast
208 config_get gateway "$config" gateway
209 config_get ip6gw "$config" ip6gw
210 config_get dns "$config" dns
211 config_get bcast "$config" broadcast
212
213 [ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask" broadcast "${bcast:-+}"
214 [ -z "$ip6addr" ] || $DEBUG ifconfig "$iface" add "$ip6addr"
215 [ -z "$gateway" ] || $DEBUG route add default gw "$gateway" dev "$iface"
216 [ -z "$ip6gw" ] || $DEBUG route -A inet6 add default gw "$ip6gw" dev "$iface"
217 [ -z "$dns" ] || {
218 for ns in $dns; do
219 grep "$ns" /tmp/resolv.conf.auto 2>/dev/null >/dev/null || {
220 echo "nameserver $ns" >> /tmp/resolv.conf.auto
221 }
222 done
223 }
224
225 config_get type "$config" TYPE
226 [ "$type" = "alias" ] && return 0
227
228 env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
229 }
230
231 setup_interface_alias() {
232 local config="$1"
233 local parent="$2"
234 local iface="$3"
235
236 local cfg
237 config_get cfg "$config" interface
238 [ "$parent" == "$cfg" ] || return 0
239
240 # alias counter
241 local ctr
242 config_get ctr "$parent" alias_count 0
243 ctr="$(($ctr + 1))"
244 config_set "$parent" alias_count "$ctr"
245
246 # alias list
247 local list
248 config_get list "$parent" aliases
249 append list "$config"
250 config_set "$parent" aliases "$list"
251
252 iface="$iface:$ctr"
253 set_interface_ifname "$config" "$iface"
254
255 local proto
256 config_get proto "$config" proto "static"
257 case "${proto}" in
258 static)
259 setup_interface_static "$iface" "$config"
260 ;;
261 *)
262 echo "Unsupported type '$proto' for alias config '$config'"
263 return 1
264 ;;
265 esac
266 }
267
268 setup_interface() {
269 local iface_main="$1"
270 local config="$2"
271 local proto="$3"
272 local vifmac="$4"
273 local ip6addr_main=
274
275 [ -n "$config" ] || {
276 config=$(find_config "$iface_main")
277 [ "$?" = 0 ] || return 1
278 }
279
280 prepare_interface "$iface_main" "$config" "$vifmac" || return 0
281
282 [ "$iface_main" = "br-$config" ] && {
283 # need to bring up the bridge and wait a second for
284 # it to switch to the 'forwarding' state, otherwise
285 # it will lose its routes...
286 ifconfig "$iface_main" up
287 sleep 1
288 }
289
290 # Interface settings
291 grep "$iface_main:" /proc/net/dev > /dev/null && {
292 local mtu macaddr
293 config_get mtu "$config" mtu
294 config_get macaddr "$config" macaddr
295 [ -n "$macaddr" ] && $DEBUG ifconfig "$iface_main" down
296 $DEBUG ifconfig "$iface_main" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} up
297 }
298 set_interface_ifname "$config" "$iface_main"
299
300 [ -n "$proto" ] || config_get proto "$config" proto
301 case "$proto" in
302 static)
303 config_get ip6addr_main "$config" ip6addr
304 setup_interface_static "$iface_main" "$config"
305 ;;
306 dhcp)
307 local lockfile="/var/lock/dhcp-$iface_main"
308 lock "$lockfile"
309
310 # prevent udhcpc from starting more than once
311 local pidfile="/var/run/dhcp-${iface_main}.pid"
312 local pid="$(cat "$pidfile" 2>/dev/null)"
313 if [ -d "/proc/$pid" ] && grep -qs udhcpc "/proc/${pid}/cmdline"; then
314 lock -u "$lockfile"
315 else
316 local ipaddr netmask hostname proto1 clientid
317 config_get ipaddr "$config" ipaddr
318 config_get netmask "$config" netmask
319 config_get hostname "$config" hostname
320 config_get proto1 "$config" proto
321 config_get clientid "$config" clientid
322
323 [ -z "$ipaddr" ] || \
324 $DEBUG ifconfig "$iface_main" "$ipaddr" ${netmask:+netmask "$netmask"}
325
326 # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
327 local dhcpopts
328 [ ."$proto1" != ."$proto" ] && dhcpopts="-n -q"
329 $DEBUG eval udhcpc -t 0 -i "$iface_main" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} ${clientid:+-c $clientid} -b -p "$pidfile" ${dhcpopts:- -O rootpath -R &}
330 lock -u "$lockfile"
331 fi
332 ;;
333 none)
334 setup_interface_none "$iface_main" "$config"
335 ;;
336 *)
337 if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
338 eval "setup_interface_$proto '$iface_main' '$config' '$proto'"
339 else
340 echo "Interface type $proto not supported."
341 return 1
342 fi
343 ;;
344 esac
345 [ "$proto" = none ] || {
346 for ifn in `ifconfig | grep "^$iface_main:" | awk '{print $1}'`; do
347 ifconfig "$ifn" down
348 done
349 }
350
351 local aliases
352 config_set "$config" aliases ""
353 config_set "$config" alias_count 0
354 config_foreach setup_interface_alias alias "$config" "$iface_main"
355 config_get aliases "$config" aliases
356 [ -z "$aliases" ] || uci_set_state network "$config" aliases "$aliases"
357
358 # put the ip6addr back to the beginning to become the main ip again
359 [ -z "$ip6addr_main" ] || {
360 $DEBUG ifconfig "$iface_main" del "$ip6addr_main"
361 $DEBUG ifconfig "$iface_main" add "$ip6addr_main"
362 }
363 }
364
365 stop_interface_dhcp() {
366 local config="$1"
367
368 local iface
369 config_get ifname "$config" ifname
370
371 local lock="/var/lock/dhcp-${ifname}"
372 [ -f "$lock" ] && lock -u "$lock"
373
374 local pidfile="/var/run/dhcp-${ifname}.pid"
375 local pid="$(cat "$pidfile" 2>/dev/null)"
376 [ -d "/proc/$pid" ] && {
377 grep -qs udhcpc "/proc/$pid/cmdline" && kill -TERM $pid && \
378 while grep -qs udhcpc "/proc/$pid/cmdline"; do sleep 1; done
379 rm -f "$pidfile"
380 }
381
382 uci -P /var/state revert "network.$config"
383 }
384
385 unbridge() {
386 local dev="$1"
387 local brdev
388
389 [ -x /usr/sbin/brctl ] || return 0
390 brctl show 2>/dev/null | grep "$dev" >/dev/null && {
391 # interface is still part of a bridge, correct that
392
393 for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
394 brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
395 done
396 }
397 }