base-files: some /lib/network/config.sh refactoring
[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" "${1##*\.}"
64 return 0
65 }
66 return 1
67 }
68
69 # sort the device list, drop duplicates
70 sort_list() {
71 local arg="$*"
72 (
73 for item in $arg; do
74 echo "$item"
75 done
76 ) | sort -u
77 }
78
79 # Create the interface, if necessary.
80 # Return status 0 indicates that the setup_interface() call should continue
81 # Return status 1 means that everything is set up already.
82
83 prepare_interface() {
84 local iface="$1"
85 local config="$2"
86 local vifmac="$3"
87
88 # if we're called for the bridge interface itself, don't bother trying
89 # to create any interfaces here. The scripts have already done that, otherwise
90 # the bridge interface wouldn't exist.
91 [ "br-$config" = "$iface" -o -e "$iface" ] && return 0;
92
93 ifconfig "$iface" 2>/dev/null >/dev/null && {
94 local proto
95 config_get proto "$config" proto
96
97 # make sure the interface is removed from any existing bridge and deconfigured,
98 # (deconfigured only if the interface is not set to proto=none)
99 unbridge "$iface"
100 [ "$proto" = none ] || ifconfig "$iface" 0.0.0.0
101
102 # Change interface MAC address if requested
103 [ -n "$vifmac" ] && {
104 ifconfig "$iface" down
105 ifconfig "$iface" hw ether "$vifmac" up
106 }
107 }
108
109 # Setup VLAN interfaces
110 add_vlan "$iface" && return 1
111 ifconfig "$iface" 2>/dev/null >/dev/null || return 0
112
113 # Setup bridging
114 local iftype
115 config_get iftype "$config" type
116 case "$iftype" in
117 bridge)
118 [ -x /usr/sbin/brctl ] && {
119 ifconfig "br-$config" 2>/dev/null >/dev/null && {
120 local newdevs devices
121 config_get devices "$config" device
122 for dev in $(sort_list "$devices" "$iface"); do
123 append newdevs "$dev"
124 done
125 uci_set_state network "$config" device "$newdevs"
126 $DEBUG brctl addif "br-$config" "$iface"
127 # Bridge existed already. No further processing necesary
128 } || {
129 local stp
130 config_get_bool stp "$config" stp 0
131 $DEBUG brctl addbr "br-$config"
132 $DEBUG brctl setfd "br-$config" 0
133 $DEBUG ifconfig "br-$config" up
134 $DEBUG brctl addif "br-$config" "$iface"
135 $DEBUG brctl stp "br-$config" $stp
136 # Creating the bridge here will have triggered a hotplug event, which will
137 # result in another setup_interface() call, so we simply stop processing
138 # the current event at this point.
139 }
140 ifconfig "$iface" up 2>/dev/null >/dev/null
141 return 1
142 }
143 ;;
144 esac
145 return 0
146 }
147
148 set_interface_ifname() {
149 local config="$1"
150 local ifname="$2"
151
152 local device
153 config_get device "$1" device
154 uci_set_state network "$config" ifname "$ifname"
155 uci_set_state network "$config" device "$device"
156 }
157
158 setup_interface_none() {
159 env -i ACTION="ifup" INTERFACE="$2" DEVICE="$1" PROTO=none /sbin/hotplug-call "iface" &
160 }
161
162 setup_interface_static() {
163 local iface="$1"
164 local config="$2"
165
166 local ipaddr netmask ip6addr
167 config_get ipaddr "$config" ipaddr
168 config_get netmask "$config" netmask
169 config_get ip6addr "$config" ip6addr
170 [ -z "$ipaddr" -o -z "$netmask" ] && [ -z "$ip6addr" ] && return 1
171
172 local gateway ip6gw dns bcast
173 config_get gateway "$config" gateway
174 config_get ip6gw "$config" ip6gw
175 config_get dns "$config" dns
176 config_get bcast "$config" broadcast
177
178 [ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask" broadcast "${bcast:-+}"
179 [ -z "$ip6addr" ] || $DEBUG ifconfig "$iface" add "$ip6addr"
180 [ -z "$gateway" ] || $DEBUG route add default gw "$gateway" dev "$iface"
181 [ -z "$ip6gw" ] || $DEBUG route -A inet6 add default gw "$ip6gw" dev "$iface"
182 [ -z "$dns" ] || {
183 for ns in $dns; do
184 grep "$ns" /tmp/resolv.conf.auto 2>/dev/null >/dev/null || {
185 echo "nameserver $ns" >> /tmp/resolv.conf.auto
186 }
187 done
188 }
189
190 config_get type "$config" TYPE
191 [ "$type" = "alias" ] && return 0
192
193 env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
194 }
195
196 setup_interface_alias() {
197 local config="$1"
198 local parent="$2"
199 local iface="$3"
200
201 local cfg
202 config_get cfg "$config" interface
203 [ "$parent" == "$cfg" ] || return 0
204
205 # alias counter
206 local ctr
207 config_get ctr "$parent" alias_count 0
208 ctr="$(($ctr + 1))"
209 config_set "$parent" alias_count "$ctr"
210
211 # alias list
212 local list
213 config_get list "$parent" aliases
214 append list "$config"
215 config_set "$parent" aliases "$list"
216
217 iface="$iface:$ctr"
218 set_interface_ifname "$config" "$iface"
219
220 local proto
221 config_get proto "$config" proto "static"
222 case "${proto}" in
223 static)
224 setup_interface_static "$iface" "$config"
225 ;;
226 *)
227 echo "Unsupported type '$proto' for alias config '$config'"
228 return 1
229 ;;
230 esac
231 }
232
233 setup_interface() {
234 local iface="$1"
235 local config="$2"
236 local proto="$3"
237 local vifmac="$4"
238
239 [ -n "$config" ] || {
240 config=$(find_config "$iface")
241 [ "$?" = 0 ] || return 1
242 }
243
244 prepare_interface "$iface" "$config" "$vifmac" || return 0
245
246 [ "$iface" = "br-$config" ] && {
247 # need to bring up the bridge and wait a second for
248 # it to switch to the 'forwarding' state, otherwise
249 # it will lose its routes...
250 ifconfig "$iface" up
251 sleep 1
252 }
253
254 # Check whether this interface has an IPv6 address
255 # defined and ensure that the kmod is loaded since
256 # ifup could be triggered before modules are loaded.
257 local hasipv6
258 config_get hasipv6 "$config" ip6addr
259 [ -n "$hasipv6" ] && [ ! -d /proc/sys/net/ipv6 ] && {
260 grep -q '^ipv6' /etc/modules.d/* && insmod ipv6
261 }
262
263 # Interface settings
264 grep "$iface:" /proc/net/dev > /dev/null && {
265 local mtu macaddr
266 config_get mtu "$config" mtu
267 config_get macaddr "$config" macaddr
268 [ -n "$macaddr" ] && $DEBUG ifconfig "$iface" down
269 $DEBUG ifconfig "$iface" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} up
270 }
271 set_interface_ifname "$config" "$iface"
272
273 pidfile="/var/run/$iface.pid"
274 [ -n "$proto" ] || config_get proto "$config" proto
275 case "$proto" in
276 static)
277 setup_interface_static "$iface" "$config"
278 ;;
279 dhcp)
280 # prevent udhcpc from starting more than once
281 lock "/var/lock/dhcp-$iface"
282 local pid="$(cat "$pidfile" 2>/dev/null)"
283 if [ -d "/proc/$pid" ] && grep udhcpc "/proc/${pid}/cmdline" >/dev/null 2>/dev/null; then
284 lock -u "/var/lock/dhcp-$iface"
285 else
286 local ipaddr netmask hostname proto1 clientid
287 config_get ipaddr "$config" ipaddr
288 config_get netmask "$config" netmask
289 config_get hostname "$config" hostname
290 config_get proto1 "$config" proto
291 config_get clientid "$config" clientid
292
293 [ -z "$ipaddr" ] || \
294 $DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
295
296 # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
297 local dhcpopts
298 [ ."$proto1" != ."$proto" ] && dhcpopts="-n -q"
299 $DEBUG eval udhcpc -t 0 -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} ${clientid:+-c $clientid} -b -p "$pidfile" ${dhcpopts:- -R &}
300 lock -u "/var/lock/dhcp-$iface"
301 fi
302 ;;
303 none)
304 setup_interface_none "$iface" "$config"
305 ;;
306 *)
307 if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
308 eval "setup_interface_$proto '$iface' '$config' '$proto'"
309 else
310 echo "Interface type $proto not supported."
311 return 1
312 fi
313 ;;
314 esac
315 [ "$proto" = none ] || {
316 for ifn in `ifconfig | grep "^$iface:" | awk '{print $1}'`; do
317 ifconfig "$ifn" down
318 done
319 }
320
321 local aliases
322 config_set "$config" aliases ""
323 config_set "$config" alias_count 0
324 config_foreach setup_interface_alias alias "$config" "$iface"
325 config_get aliases "$config" aliases
326 [ -z "$aliases" ] || uci_set_state network "$config" aliases "$aliases"
327 }
328
329 unbridge() {
330 local dev="$1"
331 local brdev
332
333 [ -x /usr/sbin/brctl ] || return 0
334 brctl show | grep "$dev" >/dev/null && {
335 # interface is still part of a bridge, correct that
336
337 for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
338 brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
339 done
340 }
341 }