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#!/bin/sh
# Copyright (C) 2006 OpenWrt.org
# DEBUG="echo"
find_config() {
local iftype device iface ifaces ifn
for ifn in $interfaces; do
config_get iftype "$ifn" type
config_get iface "$ifn" ifname
case "$iftype" in
bridge) config_get ifaces "$ifn" ifnames;;
esac
config_get device "$ifn" device
for ifc in $device $iface $ifaces; do
[ ."$ifc" = ."$1" ] && {
echo "$ifn"
return 0
}
done
done
return 1;
}
scan_interfaces() {
local cfgfile="$1"
local mode iftype iface ifname device
interfaces=
config_cb() {
case "$1" in
interface)
config_set "$2" auto 1
;;
esac
config_get iftype "$CONFIG_SECTION" TYPE
case "$iftype" in
interface)
config_get proto "$CONFIG_SECTION" proto
append interfaces "$CONFIG_SECTION"
config_get iftype "$CONFIG_SECTION" type
config_get ifname "$CONFIG_SECTION" ifname
config_set "$CONFIG_SECTION" device "$ifname"
case "$iftype" in
bridge)
config_set "$CONFIG_SECTION" ifnames "$ifname"
config_set "$CONFIG_SECTION" ifname br-"$CONFIG_SECTION"
;;
esac
( type "scan_$proto" ) >/dev/null 2>/dev/null && eval "scan_$proto '$CONFIG_SECTION'"
;;
esac
}
config_load "${cfgfile:-network}"
}
add_vlan() {
local vif="${1%\.*}"
[ "$1" = "$vif" ] || ifconfig "$1" >/dev/null 2>/dev/null || {
ifconfig "$vif" up 2>/dev/null >/dev/null || add_vlan "$vif"
$DEBUG vconfig add "$vif" "${1##*\.}"
}
}
# Create the interface, if necessary.
# Return status 0 indicates that the setup_interface() call should continue
# Return status 1 means that everything is set up already.
prepare_interface() {
local iface="$1"
local config="$2"
# if we're called for the bridge interface itself, don't bother trying
# to create any interfaces here. The scripts have already done that, otherwise
# the bridge interface wouldn't exist.
[ "br-$config" = "$iface" ] && return 0;
[ -f "$iface" ] && return 0;
ifconfig "$iface" 2>/dev/null >/dev/null && {
# make sure the interface is removed from any existing bridge and brought down
ifconfig "$iface" down
unbridge "$iface"
}
# Setup VLAN interfaces
add_vlan "$iface"
ifconfig "$iface" 2>/dev/null >/dev/null || return 0
# Setup bridging
config_get iftype "$config" type
case "$iftype" in
bridge)
[ -x /usr/sbin/brctl ] && {
ifconfig "$iface" up 2>/dev/null >/dev/null
ifconfig "br-$config" 2>/dev/null >/dev/null && {
$DEBUG brctl addif "br-$config" "$iface"
# Bridge existed already. No further processing necesary
} || {
$DEBUG brctl addbr "br-$config"
$DEBUG brctl setfd "br-$config" 0
$DEBUG brctl addif "br-$config" "$iface"
# Creating the bridge here will have triggered a hotplug event, which will
# result in another setup_interface() call, so we simply stop processing
# the current event at this point.
}
return 1
}
;;
esac
return 0
}
setup_interface() {
local iface="$1"
local config="$2"
local proto
local macaddr
[ -n "$config" ] || {
config=$(find_config "$iface")
[ "$?" = 0 ] || return 1
}
proto="${3:-$(config_get "$config" proto)}"
prepare_interface "$iface" "$config" || return 0
[ "$iface" = "br-$config" ] && {
# need to bring up the bridge and wait a second for
# it to switch to the 'forwarding' state, otherwise
# it will lose its routes...
ifconfig "$iface" up
sleep 1
}
# Interface settings
config_get mtu "$config" mtu
config_get macaddr "$config" macaddr
$DEBUG ifconfig "$iface" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} up
pidfile="/var/run/$iface.pid"
case "$proto" in
static)
config_get ipaddr "$config" ipaddr
config_get netmask "$config" netmask
[ -z "$ipaddr" -o -z "$netmask" ] && return 1
config_get ip6addr "$config" ip6addr
config_get gateway "$config" gateway
config_get dns "$config" dns
config_get bcast "$config" broadcast
[ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask"
[ -z "$ip6addr" ] || $DEBUG ifconfig "$iface" add "$ip6addr"
[ -z "$gateway" ] || $DEBUG route add default gw "$gateway"
[ -z "$bcast" ] || $DEBUG ifconfig "$iface" broadcast "$bcast"
[ -z "$dns" -o -f /tmp/resolv.conf.auto ] || {
for ns in $dns; do
echo "nameserver $ns" >> /tmp/resolv.conf.auto
done
}
env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
;;
dhcp)
# prevent udhcpc from starting more than once
lock "/var/lock/dhcp-$iface"
pid="$(cat "$pidfile" 2>/dev/null)"
[ -d "/proc/$pid" ] && grep udhcpc "/proc/${pid}/cmdline" >/dev/null 2>/dev/null && {
lock -u "/var/lock/dhcp-$iface"
return 0
}
config_get ipaddr "$config" ipaddr
config_get netmask "$config" netmask
config_get hostname "$config" hostname
config_get proto1 "$config" proto
[ -z "$ipaddr" ] || \
$DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
# don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
[ ."$proto1" != ."$proto" ] && dhcpopts="-n -q"
$DEBUG eval udhcpc -t 0 -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} -b -p "$pidfile" ${dhcpopts:- -R &}
lock -u "/var/lock/dhcp-$iface"
;;
*)
if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
eval "setup_interface_$proto '$iface' '$config' '$proto'"
else
echo "Interface type $proto not supported."
return 1
fi
;;
esac
}
unbridge() {
local dev="$1"
local brdev
[ -x /usr/sbin/brctl ] || return 0
brctl show | grep "$dev" >/dev/null && {
# interface is still part of a bridge, correct that
for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
done
}
}
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