[package] base-files:
[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 ifconfig "br-$config" 2>/dev/null >/dev/null && {
168 local newdevs devices
169 config_get devices "$config" device
170 for dev in $(sort_list "$devices" "$iface"); do
171 append newdevs "$dev"
172 done
173 uci_set_state network "$config" device "$newdevs"
174 $DEBUG ifconfig "$iface" 0.0.0.0
175 $DEBUG brctl addif "br-$config" "$iface"
176 # Bridge existed already. No further processing necesary
177 } || {
178 local stp
179 config_get_bool stp "$config" stp 0
180 $DEBUG brctl addbr "br-$config"
181 $DEBUG brctl setfd "br-$config" 0
182 $DEBUG ifconfig "br-$config" up
183 $DEBUG ifconfig "$iface" 0.0.0.0
184 $DEBUG brctl addif "br-$config" "$iface"
185 $DEBUG brctl stp "br-$config" $stp
186 # Creating the bridge here will have triggered a hotplug event, which will
187 # result in another setup_interface() call, so we simply stop processing
188 # the current event at this point.
189 }
190 ifconfig "$iface" ${macaddr:+hw ether "${macaddr}"} up 2>/dev/null >/dev/null
191 return 1
192 }
193 ;;
194 esac
195 return 0
196 }
197
198 set_interface_ifname() {
199 local config="$1"
200 local ifname="$2"
201
202 local device
203 config_get device "$1" device
204 uci_set_state network "$config" ifname "$ifname"
205 uci_set_state network "$config" device "$device"
206 }
207
208 setup_interface_none() {
209 env -i ACTION="ifup" INTERFACE="$2" DEVICE="$1" PROTO=none /sbin/hotplug-call "iface" &
210 }
211
212 setup_interface_static() {
213 local iface="$1"
214 local config="$2"
215
216 local ipaddr netmask ip6addr
217 config_get ipaddr "$config" ipaddr
218 config_get netmask "$config" netmask
219 config_get ip6addr "$config" ip6addr
220 [ -z "$ipaddr" -o -z "$netmask" ] && [ -z "$ip6addr" ] && return 1
221
222 local gateway ip6gw dns bcast
223 config_get gateway "$config" gateway
224 config_get ip6gw "$config" ip6gw
225 config_get dns "$config" dns
226 config_get bcast "$config" broadcast
227
228 [ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask" broadcast "${bcast:-+}"
229 [ -z "$ip6addr" ] || $DEBUG ifconfig "$iface" add "$ip6addr"
230 [ -z "$gateway" ] || $DEBUG route add default gw "$gateway" dev "$iface"
231 [ -z "$ip6gw" ] || $DEBUG route -A inet6 add default gw "$ip6gw" dev "$iface"
232 [ -z "$dns" ] || add_dns "$config" $dns
233
234 config_get type "$config" TYPE
235 [ "$type" = "alias" ] && return 0
236
237 env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
238 }
239
240 setup_interface_alias() {
241 local config="$1"
242 local parent="$2"
243 local iface="$3"
244
245 local cfg
246 config_get cfg "$config" interface
247 [ "$parent" == "$cfg" ] || return 0
248
249 # alias counter
250 local ctr
251 config_get ctr "$parent" alias_count 0
252 ctr="$(($ctr + 1))"
253 config_set "$parent" alias_count "$ctr"
254
255 # alias list
256 local list
257 config_get list "$parent" aliases
258 append list "$config"
259 config_set "$parent" aliases "$list"
260
261 iface="$iface:$ctr"
262 set_interface_ifname "$config" "$iface"
263
264 local proto
265 config_get proto "$config" proto "static"
266 case "${proto}" in
267 static)
268 setup_interface_static "$iface" "$config"
269 ;;
270 *)
271 echo "Unsupported type '$proto' for alias config '$config'"
272 return 1
273 ;;
274 esac
275 }
276
277 setup_interface() {
278 local iface_main="$1"
279 local config="$2"
280 local proto="$3"
281 local vifmac="$4"
282 local ip6addr_main=
283
284 [ -n "$config" ] || {
285 config=$(find_config "$iface_main")
286 [ "$?" = 0 ] || return 1
287 }
288
289 prepare_interface "$iface_main" "$config" "$vifmac" || return 0
290
291 [ "$iface_main" = "br-$config" ] && {
292 # need to bring up the bridge and wait a second for
293 # it to switch to the 'forwarding' state, otherwise
294 # it will lose its routes...
295 ifconfig "$iface_main" up
296 sleep 1
297 }
298
299 # Interface settings
300 grep "$iface_main:" /proc/net/dev > /dev/null && {
301 local mtu macaddr
302 config_get mtu "$config" mtu
303 config_get macaddr "$config" macaddr
304 [ -n "$macaddr" ] && $DEBUG ifconfig "$iface_main" down
305 $DEBUG ifconfig "$iface_main" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} up
306 }
307 set_interface_ifname "$config" "$iface_main"
308
309 [ -n "$proto" ] || config_get proto "$config" proto
310 case "$proto" in
311 static)
312 config_get ip6addr_main "$config" ip6addr
313 setup_interface_static "$iface_main" "$config"
314 ;;
315 dhcp)
316 local lockfile="/var/lock/dhcp-$iface_main"
317 lock "$lockfile"
318
319 # prevent udhcpc from starting more than once
320 local pidfile="/var/run/dhcp-${iface_main}.pid"
321 local pid="$(cat "$pidfile" 2>/dev/null)"
322 if [ -d "/proc/$pid" ] && grep -qs udhcpc "/proc/${pid}/cmdline"; then
323 lock -u "$lockfile"
324 else
325 local ipaddr netmask hostname proto1 clientid
326 config_get ipaddr "$config" ipaddr
327 config_get netmask "$config" netmask
328 config_get hostname "$config" hostname
329 config_get proto1 "$config" proto
330 config_get clientid "$config" clientid
331
332 [ -z "$ipaddr" ] || \
333 $DEBUG ifconfig "$iface_main" "$ipaddr" ${netmask:+netmask "$netmask"}
334
335 # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
336 local dhcpopts
337 [ ."$proto1" != ."$proto" ] && dhcpopts="-n -q"
338 $DEBUG eval udhcpc -t 0 -i "$iface_main" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} ${clientid:+-c $clientid} -b -p "$pidfile" ${dhcpopts:- -O rootpath -R &}
339 lock -u "$lockfile"
340 fi
341 ;;
342 none)
343 setup_interface_none "$iface_main" "$config"
344 ;;
345 *)
346 if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
347 eval "setup_interface_$proto '$iface_main' '$config' '$proto'"
348 else
349 echo "Interface type $proto not supported."
350 return 1
351 fi
352 ;;
353 esac
354 [ "$proto" = none ] || {
355 for ifn in `ifconfig | grep "^$iface_main:" | awk '{print $1}'`; do
356 ifconfig "$ifn" down
357 done
358 }
359
360 local aliases
361 config_set "$config" aliases ""
362 config_set "$config" alias_count 0
363 config_foreach setup_interface_alias alias "$config" "$iface_main"
364 config_get aliases "$config" aliases
365 [ -z "$aliases" ] || uci_set_state network "$config" aliases "$aliases"
366
367 # put the ip6addr back to the beginning to become the main ip again
368 [ -z "$ip6addr_main" ] || {
369 $DEBUG ifconfig "$iface_main" del "$ip6addr_main"
370 $DEBUG ifconfig "$iface_main" add "$ip6addr_main"
371 }
372 }
373
374 stop_interface_dhcp() {
375 local config="$1"
376
377 local ifname
378 config_get ifname "$config" ifname
379
380 local lock="/var/lock/dhcp-${ifname}"
381 [ -f "$lock" ] && lock -u "$lock"
382
383 remove_dns "$config"
384
385 local pidfile="/var/run/dhcp-${ifname}.pid"
386 local pid="$(cat "$pidfile" 2>/dev/null)"
387 [ -d "/proc/$pid" ] && {
388 grep -qs udhcpc "/proc/$pid/cmdline" && kill -TERM $pid && \
389 while grep -qs udhcpc "/proc/$pid/cmdline"; do sleep 1; done
390 rm -f "$pidfile"
391 }
392
393 uci -P /var/state revert "network.$config"
394 }
395
396 unbridge() {
397 local dev="$1"
398 local brdev
399
400 [ -x /usr/sbin/brctl ] || return 0
401 brctl show 2>/dev/null | grep "$dev" >/dev/null && {
402 # interface is still part of a bridge, correct that
403
404 for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
405 brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
406 done
407 }
408 }