keep track of the network interface states (stored in uci format in /var/state/network, overlay over /etc/config/network)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7643 3c298f89-4303-0410-b956-a3cf2f4a3e73

5 files changed, 25 insertions, 6 deletions

diff --git a/package/base-files/files/etc/hotplug.d/iface/00-netstate b/package/base-files/files/etc/hotplug.d/iface/00-netstate
new file mode 100644
index 000000000..fce5472cf
--- /dev/null
+++ b/package/base-files/files/etc/hotplug.d/iface/00-netstate
@@ -0,0 +1,6 @@
+[ ifup = "$ACTION" ] && {
+	uci set "/var/state/network.$INTERFACE.up=1"
+	[ -z "$DEVICE" ] || {
+		uci set "/var/state/network.$INTERFACE.ifname=$DEVICE"
+	}
+}
diff --git a/package/base-files/files/etc/init.d/boot b/package/base-files/files/etc/init.d/boot
index 7181f8b00..02519fbbc 100755
--- a/package/base-files/files/etc/init.d/boot
+++ b/package/base-files/files/etc/init.d/boot
@@ -35,6 +35,7 @@ start() {
 	mkdir -p /var/run
 	mkdir -p /var/log
 	mkdir -p /var/lock
+	mkdir -p /var/state
 	touch /var/log/wtmp
 	touch /var/log/lastlog
 	ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
diff --git a/package/base-files/files/lib/network/config.sh b/package/base-files/files/lib/network/config.sh
index 8e19a6e99..c6d909fd0 100755
--- a/package/base-files/files/lib/network/config.sh
+++ b/package/base-files/files/lib/network/config.sh
@@ -74,9 +74,7 @@ prepare_interface() {
 	# if we're called for the bridge interface itself, don't bother trying
 	# to create any interfaces here. The scripts have already done that, otherwise
 	# the bridge interface wouldn't exist.
-	[ "br-$config" = "$iface" ] && return 0;
-
-	[ -f "$iface" ] && return 0;
+	[ "br-$config" = "$iface" -o -f "$iface" ] && return 0;
 	
 	ifconfig "$iface" 2>/dev/null >/dev/null && {
 		# make sure the interface is removed from any existing bridge and brought down
@@ -155,9 +153,11 @@ setup_interface() {
 			[ -z "$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 ] || {
+			[ -z "$dns" ] || {
 				for ns in $dns; do
-					echo "nameserver $ns" >> /tmp/resolv.conf.auto
+					grep "$ns" /tmp/resolv.conf.auto 2>/dev/null >/dev/null || {
+						echo "nameserver $ns" >> /tmp/resolv.conf.auto
+					}
 				done
 			}
 
diff --git a/package/base-files/files/sbin/ifdown b/package/base-files/files/sbin/ifdown
index 8ec568ff6..f8ce81bcb 100755
--- a/package/base-files/files/sbin/ifdown
+++ b/package/base-files/files/sbin/ifdown
@@ -10,6 +10,12 @@
 	config_load network
 	exit
 }
+
+# remove the interface's network state
+FILE=/var/state/network.$$
+grep -v "^config_set '$1' " /var/state/network > "$FILE"
+mv "$FILE" /var/state/network
+
 include /lib/network
 scan_interfaces
 
diff --git a/package/base-files/files/usr/share/udhcpc/default.script b/package/base-files/files/usr/share/udhcpc/default.script
index 53bb6999f..a3a696be7 100755
--- a/package/base-files/files/usr/share/udhcpc/default.script
+++ b/package/base-files/files/usr/share/udhcpc/default.script
@@ -13,7 +13,13 @@ hotplug_event() {
 
 		config_get proto $ifc proto
 		[ "$proto" = "dhcp" ] || continue
-
+		[ ifup = "$1" ] && {
+			uci set "/var/state/network.$ifc.ipaddr=$ip"
+			uci set "/var/state/network.$ifc.netmask=${subnet:-255.255.255.0}"
+			uci set "/var/state/network.$ifc.dnsdomain=$domain"
+			uci set "/var/state/network.$ifc.dns=$dns"
+			uci set "/var/state/network.$ifc.gateway=$router"
+		}
 		env -i ACTION="$1" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
 	done
 }