network: automatically pick an address on link when L2TP.Local= is not specified

This makes L2TP.Local= support an empty string, 'auto', 'static', and
'dynamic'. When one of the values are specified, a local address is
automatically picked from the local interface of the tunnel.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/network/netdev/l2tp-tunnel.h b/src/network/netdev/l2tp-tunnel.h
index e5fda4b973..a97c924c5d 100644
--- a/src/network/netdev/l2tp-tunnel.h
+++ b/src/network/netdev/l2tp-tunnel.h
@@ -21,6 +21,14 @@ typedef enum L2tpEncapType {
         _NETDEV_L2TP_ENCAPTYPE_INVALID = -1,
 } L2tpEncapType;
 
+typedef enum L2tpLocalAddressType {
+        NETDEV_L2TP_LOCAL_ADDRESS_AUTO,
+        NETDEV_L2TP_LOCAL_ADDRESS_STATIC,
+        NETDEV_L2TP_LOCAL_ADDRESS_DYNAMIC,
+        _NETDEV_L2TP_LOCAL_ADDRESS_MAX,
+        _NETDEV_L2TP_LOCAL_ADDRESS_INVALID = -1,
+} L2tpLocalAddressType;
+
 typedef struct L2tpTunnel L2tpTunnel;
 
 typedef struct L2tpSession {
@@ -49,6 +57,7 @@ struct L2tpTunnel {
         bool udp6_csum_rx;
         bool udp6_csum_tx;
 
+        L2tpLocalAddressType local_address_type;
         union in_addr_union local;
         union in_addr_union remote;