nuke mdev and replace it with hotplug2 :)
[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 mode iftype iface ifname device
28 interfaces=
29 config_cb() {
30 case "$1" in
31 interface)
32 config_set "$2" auto 1
33 ;;
34 esac
35 config_get iftype "$CONFIG_SECTION" TYPE
36 case "$iftype" in
37 interface)
38 config_get proto "$CONFIG_SECTION" proto
39 append interfaces "$CONFIG_SECTION"
40 config_get iftype "$CONFIG_SECTION" type
41 config_get ifname "$CONFIG_SECTION" ifname
42 config_set "$CONFIG_SECTION" device "$ifname"
43 case "$iftype" in
44 bridge)
45 config_set "$CONFIG_SECTION" ifnames "$ifname"
46 config_set "$CONFIG_SECTION" ifname br-"$CONFIG_SECTION"
47 ;;
48 esac
49 ( type "scan_$proto" ) >/dev/null 2>/dev/null && eval "scan_$proto '$CONFIG_SECTION'"
50 ;;
51 esac
52 }
53 config_load network
54 }
55
56 add_vlan() {
57 local vif="${1%\.*}"
58
59 [ "$1" = "$vif" ] || ifconfig "$1" >/dev/null 2>/dev/null || {
60 ifconfig "$vif" up 2>/dev/null >/dev/null || add_vlan "$vif"
61 $DEBUG vconfig add "$vif" "${1##*\.}"
62 }
63 }
64
65 # Create the interface, if necessary.
66 # Return status 0 indicates that the setup_interface() call should continue
67 # Return status 1 means that everything is set up already.
68
69 prepare_interface() {
70 local iface="$1"
71 local config="$2"
72
73 # if we're called for the bridge interface itself, don't bother trying
74 # to create any interfaces here. The scripts have already done that, otherwise
75 # the bridge interface wouldn't exist.
76 [ "$iface" = "br-$config" ] && return 0;
77
78 ifconfig "$iface" 2>/dev/null >/dev/null && {
79 # make sure the interface is removed from any existing bridge and brought down
80 ifconfig "$iface" down
81 unbridge "$iface"
82 }
83
84 # Setup VLAN interfaces
85 add_vlan "$iface"
86
87 # Setup bridging
88 config_get iftype "$config" type
89 case "$iftype" in
90 bridge)
91 [ -x /usr/sbin/brctl ] && {
92 ifconfig "$iface" up 2>/dev/null >/dev/null
93 ifconfig "br-$config" 2>/dev/null >/dev/null && {
94 $DEBUG brctl addif "br-$config" "$iface"
95 # Bridge existed already. No further processing necesary
96 } || {
97 $DEBUG brctl addbr "br-$config"
98 $DEBUG brctl setfd "br-$config" 0
99 $DEBUG brctl addif "br-$config" "$iface"
100 # Creating the bridge here will have triggered a hotplug event, which will
101 # result in another setup_interface() call, so we simply stop processing
102 # the current event at this point.
103 }
104 return 1
105 }
106 ;;
107 esac
108 return 0
109 }
110
111 setup_interface() {
112 local iface="$1"
113 local config="$2"
114 local proto
115 local macaddr
116
117 [ -n "$config" ] || {
118 config=$(find_config "$iface")
119 [ "$?" = 0 ] || return 1
120 }
121 proto="${3:-$(config_get "$config" proto)}"
122
123 prepare_interface "$iface" "$config" || return 0
124
125 [ "$iface" = "br-$config" ] && {
126 # need to bring up the bridge and wait a second for
127 # it to switch to the 'forwarding' state, otherwise
128 # it will lose its routes...
129 ifconfig "$iface" up
130 sleep 1
131 }
132
133 # Interface settings
134 config_get mtu "$config" mtu
135 config_get macaddr "$config" macaddr
136 $DEBUG ifconfig "$iface" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} up
137
138 pidfile="/var/run/$iface.pid"
139 case "$proto" in
140 static)
141 config_get ipaddr "$config" ipaddr
142 config_get netmask "$config" netmask
143 [ -z "$ipaddr" -o -z "$netmask" ] && return 1
144
145 config_get ip6addr "$config" ip6addr
146 config_get gateway "$config" gateway
147 config_get dns "$config" dns
148 config_get bcast "$config" broadcast
149
150 [ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask"
151 [ -z "$ip6addr" ] || $DEBUG ifconfig "$iface" inet6 add "$ip6addr"
152 [ -z "$gateway" ] || $DEBUG route add default gw "$gateway"
153 [ -z "$bcast" ] || $DEBUG ifconfig "$iface" broadcast "$bcast"
154 [ -z "$dns" -o -f /tmp/resolv.conf.auto ] || {
155 for ns in $dns; do
156 echo "nameserver $ns" >> /tmp/resolv.conf.auto
157 done
158 }
159
160 env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
161 ;;
162 dhcp)
163 # prevent udhcpc from starting more than once
164 lock "/var/lock/dhcp-$iface"
165 pid="$(cat "$pidfile" 2>/dev/null)"
166 [ -d "/proc/$pid" ] && grep udhcpc "/proc/${pid}/cmdline" >/dev/null 2>/dev/null && {
167 lock -u "/var/lock/dhcp-$iface"
168 return 0
169 }
170
171 config_get ipaddr "$config" ipaddr
172 config_get netmask "$config" netmask
173 config_get hostname "$config" hostname
174 config_get proto1 "$config" proto
175
176 [ -z "$ipaddr" ] || \
177 $DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
178
179 # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
180 [ "$proto1" != "$proto" ] && dhcpopts="-n -q"
181 $DEBUG eval udhcpc -t 0 -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} -b -p "$pidfile" ${dhcpopts:- -R &}
182 lock -u "/var/lock/dhcp-$iface"
183 ;;
184 *)
185 if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
186 eval "setup_interface_$proto '$iface' '$config' '$proto'"
187 else
188 echo "Interface type $proto not supported."
189 return 1
190 fi
191 ;;
192 esac
193 }
194
195 unbridge() {
196 local dev="$1"
197 local brdev
198
199 [ -x /usr/sbin/brctl ] || return 0
200 brctl show | grep "$dev" >/dev/null && {
201 # interface is still part of a bridge, correct that
202
203 for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
204 brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
205 done
206 }
207 }