adds the option to have no proto for a interface, usefull if the uci states need...
[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="$2"
86
87 # if we're called for the bridge interface itself, don't bother trying
88 # to create any interfaces here. The scripts have already done that, otherwise
89 # the bridge interface wouldn't exist.
90 [ "br-$config" = "$iface" -o -e "$iface" ] && return 0;
91
92 ifconfig "$iface" 2>/dev/null >/dev/null && {
93 # make sure the interface is removed from any existing bridge and brought down
94 ifconfig "$iface" down
95 unbridge "$iface"
96 }
97
98 # Setup VLAN interfaces
99 add_vlan "$iface" && return 1
100 ifconfig "$iface" 2>/dev/null >/dev/null || return 0
101
102 # Setup bridging
103 config_get iftype "$config" type
104 config_get stp "$config" stp
105 case "$iftype" in
106 bridge)
107 [ -x /usr/sbin/brctl ] && {
108 ifconfig "br-$config" 2>/dev/null >/dev/null && {
109 local newdevs=
110
111 config_get devices "$config" device
112 for dev in $(sort_list "$devices" "$iface"); do
113 append newdevs "$dev"
114 done
115 uci_set_state network "$config" device "$newdevs"
116 $DEBUG brctl addif "br-$config" "$iface"
117 # Bridge existed already. No further processing necesary
118 } || {
119 $DEBUG brctl addbr "br-$config"
120 $DEBUG brctl setfd "br-$config" 0
121 $DEBUG ifconfig "br-$config" up
122 $DEBUG brctl addif "br-$config" "$iface"
123 $DEBUG brctl stp "br-$config" ${stp:-off}
124 # Creating the bridge here will have triggered a hotplug event, which will
125 # result in another setup_interface() call, so we simply stop processing
126 # the current event at this point.
127 }
128 ifconfig "$iface" up 2>/dev/null >/dev/null
129 return 1
130 }
131 ;;
132 esac
133 return 0
134 }
135
136 set_interface_ifname() {
137 local config="$1"
138 local ifname="$2"
139
140 config_get device "$1" device
141 uci_set_state network "$config" ifname "$ifname"
142 uci_set_state network "$config" device "$device"
143 }
144
145 setup_interface_none() {
146 env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=none /sbin/hotplug-call "iface" &
147 }
148
149 setup_interface_static() {
150 local iface="$1"
151 local config="$2"
152
153 config_get ipaddr "$config" ipaddr
154 config_get netmask "$config" netmask
155 config_get ip6addr "$config" ip6addr
156 [ -z "$ipaddr" -o -z "$netmask" ] && [ -z "$ip6addr" ] && return 1
157
158 config_get gateway "$config" gateway
159 config_get ip6gw "$config" ip6gw
160 config_get dns "$config" dns
161 config_get bcast "$config" broadcast
162
163 [ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask" broadcast "${bcast:-+}"
164 [ -z "$ip6addr" ] || $DEBUG ifconfig "$iface" add "$ip6addr"
165 [ -z "$gateway" ] || $DEBUG route add default gw "$gateway" dev "$iface"
166 [ -z "$ip6gw" ] || $DEBUG route -A inet6 add default gw "$ip6gw" dev "$iface"
167 [ -z "$dns" ] || {
168 for ns in $dns; do
169 grep "$ns" /tmp/resolv.conf.auto 2>/dev/null >/dev/null || {
170 echo "nameserver $ns" >> /tmp/resolv.conf.auto
171 }
172 done
173 }
174
175 env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
176 }
177
178 setup_interface_alias() {
179 local config="$1"
180 local parent="$2"
181 local iface="$3"
182
183 config_get cfg "$config" interface
184 [ "$parent" == "$cfg" ] || return 0
185
186 # alias counter
187 config_get ctr "$parent" alias_count
188 ctr="$(($ctr + 1))"
189 config_set "$parent" alias_count "$ctr"
190
191 # alias list
192 config_get list "$parent" aliases
193 append list "$config"
194 config_set "$parent" aliases "$list"
195
196 set_interface_ifname "$config" "$iface:$ctr"
197 config_get proto "$config" proto
198 case "${proto:-static}" in
199 static)
200 setup_interface_static "$iface:$ctr" "$config"
201 ;;
202 *)
203 echo "Unsupported type '$proto' for alias config '$config'"
204 return 1
205 ;;
206 esac
207 }
208
209 setup_interface() {
210 local iface="$1"
211 local config="$2"
212 local proto
213 local macaddr
214
215 [ -n "$config" ] || {
216 config=$(find_config "$iface")
217 [ "$?" = 0 ] || return 1
218 }
219 proto="${3:-$(config_get "$config" proto)}"
220
221 prepare_interface "$iface" "$config" || return 0
222
223 [ "$iface" = "br-$config" ] && {
224 # need to bring up the bridge and wait a second for
225 # it to switch to the 'forwarding' state, otherwise
226 # it will lose its routes...
227 ifconfig "$iface" up
228 sleep 1
229 }
230
231 # Interface settings
232 config_get mtu "$config" mtu
233 config_get macaddr "$config" macaddr
234 grep "$iface:" /proc/net/dev > /dev/null && \
235 $DEBUG ifconfig "$iface" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} up
236 set_interface_ifname "$config" "$iface"
237
238 pidfile="/var/run/$iface.pid"
239 case "$proto" in
240 static)
241 setup_interface_static "$iface" "$config"
242 ;;
243 dhcp)
244 # prevent udhcpc from starting more than once
245 lock "/var/lock/dhcp-$iface"
246 pid="$(cat "$pidfile" 2>/dev/null)"
247 if [ -d "/proc/$pid" ] && grep udhcpc "/proc/${pid}/cmdline" >/dev/null 2>/dev/null; then
248 lock -u "/var/lock/dhcp-$iface"
249 else
250
251 config_get ipaddr "$config" ipaddr
252 config_get netmask "$config" netmask
253 config_get hostname "$config" hostname
254 config_get proto1 "$config" proto
255 config_get clientid "$config" clientid
256
257 [ -z "$ipaddr" ] || \
258 $DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
259
260 # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
261 [ ."$proto1" != ."$proto" ] && dhcpopts="-n -q"
262 $DEBUG eval udhcpc -t 0 -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} ${clientid:+-c $clientid} -b -p "$pidfile" ${dhcpopts:- -R &}
263 lock -u "/var/lock/dhcp-$iface"
264 fi
265 ;;
266 none)
267 setup_interface_none "$iface" "$config"
268 ;;
269 *)
270 if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
271 eval "setup_interface_$proto '$iface' '$config' '$proto'"
272 else
273 echo "Interface type $proto not supported."
274 return 1
275 fi
276 ;;
277 esac
278 config_set "$config" aliases ""
279 config_set "$config" alias_count 0
280 config_foreach setup_interface_alias alias "$config" "$iface"
281 config_get aliases "$config" aliases
282 [ -z "$aliases" ] || uci_set_state network "$config" aliases "$aliases"
283 }
284
285 unbridge() {
286 local dev="$1"
287 local brdev
288
289 [ -x /usr/sbin/brctl ] || return 0
290 brctl show | grep "$dev" >/dev/null && {
291 # interface is still part of a bridge, correct that
292
293 for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
294 brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
295 done
296 }
297 }