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