netifd: Send DHCP release when client exits

Let DHCP client send a release when it exists so the DHCP server is
informed the IP address is released and allowing to clean up IP/mac
state info in intermediate devices.

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@49321 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/network/config/netifd/files/lib/netifd/proto/dhcp.sh b/package/network/config/netifd/files/lib/netifd/proto/dhcp.sh
index 0e88af9..546e1d6 100755 (executable)
--- a/package/network/config/netifd/files/lib/netifd/proto/dhcp.sh
+++ b/package/network/config/netifd/files/lib/netifd/proto/dhcp.sh
@@ -52,7 +52,7 @@ proto_dhcp_setup() {
        proto_run_command "$config" udhcpc \
                -p /var/run/udhcpc-$iface.pid \
                -s /lib/netifd/dhcp.script \
-               -f -t 0 -i "$iface" \
+               -f -R -t 0 -i "$iface" \
                ${ipaddr:+-r $ipaddr} \
                ${hostname:+-H $hostname} \
                ${vendorid:+-V $vendorid} \