netifd: on dhcp interfaces, store the dhcp server in interface data

Among other things, this can be used to auto-configure the DHCP server
address for wireless APs using FILS, if the bridged interface is
configured to DHCP

Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/package/network/config/netifd/files/lib/netifd/dhcp.script b/package/network/config/netifd/files/lib/netifd/dhcp.script
index e46005d84c634da2816740dc13ff685116903db6..6fcf139beba34b56266206373417cc6cba604366 100755 (executable)
--- a/package/network/config/netifd/files/lib/netifd/dhcp.script
+++ b/package/network/config/netifd/files/lib/netifd/dhcp.script
@@ -60,6 +60,7 @@ setup_interface () {
        [ -n "$message" ]  && json_add_string message "$message"
        [ -n "$timezone" ] && json_add_int timezone "$timezone"
        [ -n "$lease" ]    && json_add_int leasetime "$lease"
+       [ -n "$serverid" ] && json_add_string dhcpserver "$serverid"
        proto_close_data
 
        proto_send_update "$INTERFACE"