add support for -t 0 (infinite retry) in busybox udhcpc and use it in the network...
[openwrt/openwrt.git] / package / base-files / default / 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 $DEBUG udhcpc -t 0 -i "$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 }