add an optional parameter to scan_interfaces() that can override the network config...
[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 "$CONFIG_SECTION" ifname
43 config_set "$CONFIG_SECTION" device "$ifname"
44 case "$iftype" in
45 bridge)
46 config_set "$CONFIG_SECTION" ifnames "$ifname"
47 config_set "$CONFIG_SECTION" ifname br-"$CONFIG_SECTION"
48 ;;
49 esac
50 ( type "scan_$proto" ) >/dev/null 2>/dev/null && eval "scan_$proto '$CONFIG_SECTION'"
51 ;;
52 esac
53 }
54 config_load "${cfgfile:-network}"
55 }
56
57 add_vlan() {
58 local vif="${1%\.*}"
59
60 [ "$1" = "$vif" ] || ifconfig "$1" >/dev/null 2>/dev/null || {
61 ifconfig "$vif" up 2>/dev/null >/dev/null || add_vlan "$vif"
62 $DEBUG vconfig add "$vif" "${1##*\.}"
63 }
64 }
65
66 # Create the interface, if necessary.
67 # Return status 0 indicates that the setup_interface() call should continue
68 # Return status 1 means that everything is set up already.
69
70 prepare_interface() {
71 local iface="$1"
72 local config="$2"
73
74 # if we're called for the bridge interface itself, don't bother trying
75 # to create any interfaces here. The scripts have already done that, otherwise
76 # the bridge interface wouldn't exist.
77 [ "$iface" = "br-$config" ] && return 0;
78
79 ifconfig "$iface" 2>/dev/null >/dev/null && {
80 # make sure the interface is removed from any existing bridge and brought down
81 ifconfig "$iface" down
82 unbridge "$iface"
83 }
84
85 # Setup VLAN interfaces
86 add_vlan "$iface"
87
88 # Setup bridging
89 config_get iftype "$config" type
90 case "$iftype" in
91 bridge)
92 [ -x /usr/sbin/brctl ] && {
93 ifconfig "$iface" up 2>/dev/null >/dev/null
94 ifconfig "br-$config" 2>/dev/null >/dev/null && {
95 $DEBUG brctl addif "br-$config" "$iface"
96 # Bridge existed already. No further processing necesary
97 } || {
98 $DEBUG brctl addbr "br-$config"
99 $DEBUG brctl setfd "br-$config" 0
100 $DEBUG brctl addif "br-$config" "$iface"
101 # Creating the bridge here will have triggered a hotplug event, which will
102 # result in another setup_interface() call, so we simply stop processing
103 # the current event at this point.
104 }
105 return 1
106 }
107 ;;
108 esac
109 return 0
110 }
111
112 setup_interface() {
113 local iface="$1"
114 local config="$2"
115 local proto
116 local macaddr
117
118 [ -n "$config" ] || {
119 config=$(find_config "$iface")
120 [ "$?" = 0 ] || return 1
121 }
122 proto="${3:-$(config_get "$config" proto)}"
123
124 prepare_interface "$iface" "$config" || return 0
125
126 [ "$iface" = "br-$config" ] && {
127 # need to bring up the bridge and wait a second for
128 # it to switch to the 'forwarding' state, otherwise
129 # it will lose its routes...
130 ifconfig "$iface" up
131 sleep 1
132 }
133
134 # Interface settings
135 config_get mtu "$config" mtu
136 config_get macaddr "$config" macaddr
137 $DEBUG ifconfig "$iface" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} up
138
139 pidfile="/var/run/$iface.pid"
140 case "$proto" in
141 static)
142 config_get ipaddr "$config" ipaddr
143 config_get netmask "$config" netmask
144 [ -z "$ipaddr" -o -z "$netmask" ] && return 1
145
146 config_get ip6addr "$config" ip6addr
147 config_get gateway "$config" gateway
148 config_get dns "$config" dns
149 config_get bcast "$config" broadcast
150
151 [ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask"
152 [ -z "$ip6addr" ] || $DEBUG ifconfig "$iface" inet6 add "$ip6addr"
153 [ -z "$gateway" ] || $DEBUG route add default gw "$gateway"
154 [ -z "$bcast" ] || $DEBUG ifconfig "$iface" broadcast "$bcast"
155 [ -z "$dns" -o -f /tmp/resolv.conf.auto ] || {
156 for ns in $dns; do
157 echo "nameserver $ns" >> /tmp/resolv.conf.auto
158 done
159 }
160
161 env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
162 ;;
163 dhcp)
164 # prevent udhcpc from starting more than once
165 lock "/var/lock/dhcp-$iface"
166 pid="$(cat "$pidfile" 2>/dev/null)"
167 [ -d "/proc/$pid" ] && grep udhcpc "/proc/${pid}/cmdline" >/dev/null 2>/dev/null && {
168 lock -u "/var/lock/dhcp-$iface"
169 return 0
170 }
171
172 config_get ipaddr "$config" ipaddr
173 config_get netmask "$config" netmask
174 config_get hostname "$config" hostname
175 config_get proto1 "$config" proto
176
177 [ -z "$ipaddr" ] || \
178 $DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
179
180 # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
181 [ "$proto1" != "$proto" ] && dhcpopts="-n -q"
182 $DEBUG eval udhcpc -t 0 -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} -b -p "$pidfile" ${dhcpopts:- -R &}
183 lock -u "/var/lock/dhcp-$iface"
184 ;;
185 *)
186 if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
187 eval "setup_interface_$proto '$iface' '$config' '$proto'"
188 else
189 echo "Interface type $proto not supported."
190 return 1
191 fi
192 ;;
193 esac
194 }
195
196 unbridge() {
197 local dev="$1"
198 local brdev
199
200 [ -x /usr/sbin/brctl ] || return 0
201 brctl show | grep "$dev" >/dev/null && {
202 # interface is still part of a bridge, correct that
203
204 for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
205 brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
206 done
207 }
208 }