rename default/ to files/
[openwrt-10.03/.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 setup_interface() {
66         local iface="$1"
67         local config="$2"
68         local proto
69
70         [ -n "$config" ] || {
71                 config=$(find_config "$iface")
72                 [ "$?" = 0 ] || return 1
73         }
74
75         proto="${3:-$(config_get "$config" proto)}"
76         config_get iftype "$config" type
77         
78         ifconfig "$iface" 2>/dev/null >/dev/null && {
79                 # make sure the interface is removed from any existing bridge
80                 unbridge "$iface"
81         }
82
83         # Setup VLAN interfaces
84         add_vlan "$iface"
85
86         # Setup bridging
87         case "$iftype" in
88                 bridge)
89                         ifconfig "$iface" up 2>/dev/null >/dev/null
90                         ifconfig "br-$config" 2>/dev/null >/dev/null && {
91                                 $DEBUG brctl addif "br-$config" "$iface"
92                                 return 0
93                         } || {
94                                 $DEBUG brctl addbr "br-$config"
95                                 $DEBUG brctl setfd "br-$config" 0
96                                 $DEBUG brctl addif "br-$config" "$iface"
97                                 iface="br-$config"
98                         }
99                 ;;
100         esac
101         
102         # Interface settings
103         config_get mtu "$config" mtu
104         $DEBUG ifconfig "$iface" ${mtu:+mtu $mtu} up
105
106         pidfile="/var/run/$iface.pid"
107         case "$proto" in
108                 static)
109                         config_get ipaddr "$config" ipaddr
110                         config_get netmask "$config" netmask
111                         [ -z "$ipaddr" -o -z "$netmask" ] && return 1
112                         
113                         config_get ip6addr "$config" ip6addr
114                         config_get gateway "$config" gateway
115                         config_get dns "$config" dns
116                         
117                         $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask"
118                         [ -z "$gateway" ] || route add default gw "$gateway"
119                         [ -z "$dns" -o -f /tmp/resolv.conf ] || {
120                                 for ns in $dns; do
121                                         echo "nameserver $ns" >> /tmp/resolv.conf
122                                 done
123                         }
124
125                         env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug "iface" &
126                 ;;
127                 dhcp)
128                         # prevent udhcpc from starting more than once
129                         lock "/var/lock/dhcp-$iface"
130                         pid="$(cat "$pidfile" 2>/dev/null)"
131                         [ -d "/proc/$pid" ] && grep udhcpc "/proc/${pid}/cmdline" >/dev/null 2>/dev/null && {
132                                 lock -u "/var/lock/dhcp-$iface"
133                                 return 0
134                         }
135
136                         config_get ipaddr "$config" ipaddr
137                         config_get netmask "$config" netmask
138                         config_get hostname "$config" hostname
139                         config_get proto1 "$config" proto
140
141                         [ -z "$ipaddr" ] || \
142                                 $DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
143
144                         # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
145                         [ "$proto1" != "$proto" ] && dhcpopts="-n -q"
146                         $DEBUG eval udhcpc -t 0 -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} -b -p "$pidfile" ${dhcpopts:- -R &}
147                         lock -u "/var/lock/dhcp-$iface"
148                 ;;
149                 *)
150                         if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
151                                 eval "setup_interface_$proto '$iface' '$config' '$proto'" 
152                         else
153                                 echo "Interface type $proto not supported."
154                                 return 1
155                         fi
156                 ;;
157         esac
158 }
159
160 unbridge() {
161         local dev="$1"
162         local brdev
163
164         brctl show | grep "$dev" >/dev/null && {
165                 # interface is still part of a bridge, correct that
166
167                 for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
168                         brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
169                 done
170         }
171 }