1bbe6232e4c77826abb12f201cb77bb5035091d5
[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"
28 local mode iftype iface ifname device
29 interfaces=
30 config_cb() {
31 case "$1" in
32 interface)
33 config_set "$2" auto 1
34 ;;
35 esac
36 config_get iftype "$CONFIG_SECTION" TYPE
37 case "$iftype" in
38 interface)
39 config_get proto "$CONFIG_SECTION" proto
40 append interfaces "$CONFIG_SECTION"
41 config_get iftype "$CONFIG_SECTION" type
42 config_get ifname "$CONFIG_SECTION" ifname
43 config_get device "$CONFIG_SECTION" device
44 config_set "$CONFIG_SECTION" device "${device:-$ifname}"
45 case "$iftype" in
46 bridge)
47 config_set "$CONFIG_SECTION" ifnames "${device:-$ifname}"
48 config_set "$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 "${cfgfile:-network}"
56 }
57
58 add_vlan() {
59 local vif="${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="$3"
87 local proto
88
89 # if we're called for the bridge interface itself, don't bother trying
90 # to create any interfaces here. The scripts have already done that, otherwise
91 # the bridge interface wouldn't exist.
92 [ "br-$config" = "$iface" -o -e "$iface" ] && return 0;
93
94 ifconfig "$iface" 2>/dev/null >/dev/null && {
95 config_get proto "$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 "$iface" 2>/dev/null >/dev/null || return 0
112
113 # Setup bridging
114 config_get iftype "$config" type
115 config_get stp "$config" stp
116 case "$iftype" in
117 bridge)
118 [ -x /usr/sbin/brctl ] && {
119 ifconfig "br-$config" 2>/dev/null >/dev/null && {
120 local newdevs=
121
122 config_get devices "$config" device
123 for dev in $(sort_list "$devices" "$iface"); do
124 append newdevs "$dev"
125 done
126 uci_set_state network "$config" device "$newdevs"
127 $DEBUG brctl addif "br-$config" "$iface"
128 # Bridge existed already. No further processing necesary
129 } || {
130 $DEBUG brctl addbr "br-$config"
131 $DEBUG brctl setfd "br-$config" 0
132 $DEBUG ifconfig "br-$config" up
133 $DEBUG brctl addif "br-$config" "$iface"
134 $DEBUG brctl stp "br-$config" ${stp:-0}
135 # Creating the bridge here will have triggered a hotplug event, which will
136 # result in another setup_interface() call, so we simply stop processing
137 # the current event at this point.
138 }
139 ifconfig "$iface" up 2>/dev/null >/dev/null
140 return 1
141 }
142 ;;
143 esac
144 return 0
145 }
146
147 set_interface_ifname() {
148 local config="$1"
149 local ifname="$2"
150
151 config_get device "$1" device
152 uci_set_state network "$config" ifname "$ifname"
153 uci_set_state network "$config" device "$device"
154 }
155
156 setup_interface_none() {
157 env -i ACTION="ifup" INTERFACE="$2" DEVICE="$1" PROTO=none /sbin/hotplug-call "iface" &
158 }
159
160 setup_interface_static() {
161 local iface="$1"
162 local config="$2"
163
164 config_get ipaddr "$config" ipaddr
165 config_get netmask "$config" netmask
166 config_get ip6addr "$config" ip6addr
167 [ -z "$ipaddr" -o -z "$netmask" ] && [ -z "$ip6addr" ] && return 1
168
169 config_get gateway "$config" gateway
170 config_get ip6gw "$config" ip6gw
171 config_get dns "$config" dns
172 config_get bcast "$config" broadcast
173
174 [ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask" broadcast "${bcast:-+}"
175 [ -z "$ip6addr" ] || $DEBUG ifconfig "$iface" add "$ip6addr"
176 [ -z "$gateway" ] || $DEBUG route add default gw "$gateway" dev "$iface"
177 [ -z "$ip6gw" ] || $DEBUG route -A inet6 add default gw "$ip6gw" dev "$iface"
178 [ -z "$dns" ] || {
179 for ns in $dns; do
180 grep "$ns" /tmp/resolv.conf.auto 2>/dev/null >/dev/null || {
181 echo "nameserver $ns" >> /tmp/resolv.conf.auto
182 }
183 done
184 }
185
186 config_get type "$config" TYPE
187 [ "$type" = "alias" ] && return 0
188
189 env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
190 }
191
192 setup_interface_alias() {
193 local config="$1"
194 local parent="$2"
195 local iface="$3"
196
197 config_get cfg "$config" interface
198 [ "$parent" == "$cfg" ] || return 0
199
200 # alias counter
201 config_get ctr "$parent" alias_count
202 ctr="$(($ctr + 1))"
203 config_set "$parent" alias_count "$ctr"
204
205 # alias list
206 config_get list "$parent" aliases
207 append list "$config"
208 config_set "$parent" aliases "$list"
209
210 set_interface_ifname "$config" "$iface:$ctr"
211 config_get proto "$config" proto
212 case "${proto:-static}" in
213 static)
214 setup_interface_static "$iface:$ctr" "$config"
215 ;;
216 *)
217 echo "Unsupported type '$proto' for alias config '$config'"
218 return 1
219 ;;
220 esac
221 }
222
223 setup_interface() {
224 local iface="$1"
225 local config="$2"
226 local vifmac="$4"
227 local proto
228 local macaddr
229 local hasipv6
230
231 [ -n "$config" ] || {
232 config=$(find_config "$iface")
233 [ "$?" = 0 ] || return 1
234 }
235 proto="${3:-$(config_get "$config" proto)}"
236
237 prepare_interface "$iface" "$config" "$vifmac" || return 0
238
239 [ "$iface" = "br-$config" ] && {
240 # need to bring up the bridge and wait a second for
241 # it to switch to the 'forwarding' state, otherwise
242 # it will lose its routes...
243 ifconfig "$iface" up
244 sleep 1
245 }
246
247 # Check whether this interface has an IPv6 address
248 # defined and ensure that the kmod is loaded since
249 # ifup could be triggered before modules are loaded.
250 config_get hasipv6 "$config" ip6addr
251 [ -n "$hasipv6" ] && [ ! -d /proc/sys/net/ipv6 ] && {
252 grep -q '^ipv6' /etc/modules.d/* && insmod ipv6
253 }
254
255 # Interface settings
256 config_get mtu "$config" mtu
257 config_get macaddr "$config" macaddr
258 grep "$iface:" /proc/net/dev > /dev/null && {
259 [ -n "$macaddr" ] && $DEBUG ifconfig "$iface" down
260 $DEBUG ifconfig "$iface" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} up
261 }
262 set_interface_ifname "$config" "$iface"
263
264 pidfile="/var/run/$iface.pid"
265 case "$proto" in
266 static)
267 setup_interface_static "$iface" "$config"
268 ;;
269 dhcp)
270 # prevent udhcpc from starting more than once
271 lock "/var/lock/dhcp-$iface"
272 pid="$(cat "$pidfile" 2>/dev/null)"
273 if [ -d "/proc/$pid" ] && grep udhcpc "/proc/${pid}/cmdline" >/dev/null 2>/dev/null; then
274 lock -u "/var/lock/dhcp-$iface"
275 else
276
277 config_get ipaddr "$config" ipaddr
278 config_get netmask "$config" netmask
279 config_get hostname "$config" hostname
280 config_get proto1 "$config" proto
281 config_get clientid "$config" clientid
282
283 [ -z "$ipaddr" ] || \
284 $DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
285
286 # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
287 [ ."$proto1" != ."$proto" ] && dhcpopts="-n -q"
288 $DEBUG eval udhcpc -t 0 -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} ${clientid:+-c $clientid} -b -p "$pidfile" ${dhcpopts:- -R &}
289 lock -u "/var/lock/dhcp-$iface"
290 fi
291 ;;
292 none)
293 setup_interface_none "$iface" "$config"
294 ;;
295 *)
296 if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
297 eval "setup_interface_$proto '$iface' '$config' '$proto'"
298 else
299 echo "Interface type $proto not supported."
300 return 1
301 fi
302 ;;
303 esac
304 [ "$proto" = none ] || {
305 for ifn in `ifconfig | grep "^$iface:" | awk '{print $1}'`; do
306 ifconfig "$ifn" down
307 done
308 }
309 config_set "$config" aliases ""
310 config_set "$config" alias_count 0
311 config_foreach setup_interface_alias alias "$config" "$iface"
312 config_get aliases "$config" aliases
313 [ -z "$aliases" ] || uci_set_state network "$config" aliases "$aliases"
314 }
315
316 unbridge() {
317 local dev="$1"
318 local brdev
319
320 [ -x /usr/sbin/brctl ] || return 0
321 brctl show | grep "$dev" >/dev/null && {
322 # interface is still part of a bridge, correct that
323
324 for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
325 brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
326 done
327 }
328 }