Translate matching packets using NAT (VPP-1069)

Add API function which enables forwarding of packets not matching
existing translation or static mapping instead of dropping them.

When forwarding is enabled matching packets will be translated
while non-matching packets will be forwarded without translation.

Change-Id: Ic13040cbad16d3a1ecdc3e02a497171bef6aa413
Signed-off-by: Juraj Sloboda <jsloboda@cisco.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/src/plugins/nat/nat.api b/src/plugins/nat/nat.api
index 2a8eeb9489f..d6a912b72d0 100644
--- a/src/plugins/nat/nat.api
+++ b/src/plugins/nat/nat.api
@@ -606,6 +606,37 @@ autoreply define nat44_del_session {
   u32 vrf_id;
 };
 
+/** \brief Enable/disable forwarding for NAT44
+    Forward packets which don't match existing translation
+    or static mapping instead of dropping them.
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param enable - 0 for enable, 1 for disable
+*/
+autoreply define nat44_forwarding_enable_disable {
+  u32 client_index;
+  u32 context;
+  u8 enable;
+};
+
+/** \brief Check if forwarding is enabled or disabled
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+*/
+define nat44_forwarding_is_enabled {
+  u32 client_index;
+  u32 context;
+};
+
+/** \brief Response to check if forwarding is enabled or disabled
+    @param context - sender context, to match reply w/ request
+    @param enabled - 1 if enabled, 0 if disabled
+*/
+define nat44_forwarding_is_enabled_reply {
+  u32 context;
+  u8 enabled;
+};
+
 
 /*
  * Deterministic NAT (CGN) APIs