nat: refactor and split fo EI/ED features p.2

Patch n. 2 aimed at moving EI features out of
NAT44 plugin & split of EI/ED functions.

Type: refactor

Change-Id: Ida20c1c084449b146344b6c3d8442f49efb6f3fa
Signed-off-by: Filip Varga <fivarga@cisco.com>

1 files changed, 96 insertions, 2 deletions

diff --git a/src/plugins/nat/nat44-ei/nat44_ei.h b/src/plugins/nat/nat44-ei/nat44_ei.h
index ac430bee5c3..510e73de59a 100644
--- a/src/plugins/nat/nat44-ei/nat44_ei.h
+++ b/src/plugins/nat/nat44-ei/nat44_ei.h
@@ -19,9 +19,38 @@
 #ifndef __included_nat44_ei_h__
 #define __included_nat44_ei_h__
 
-int nat44_ei_plugin_enable ();
+typedef struct
+{
+  /* maximum number of users */
+  u32 users;
+  /* maximum number of sessions */
+  u32 sessions;
+  /* maximum number of ssessions per user */
+  u32 user_sessions;
 
-void nat44_ei_plugin_disable ();
+  /* plugin features */
+  u8 static_mapping_only;
+  u8 connection_tracking;
+  u8 out2in_dpo;
+
+  u32 inside_vrf;
+  u32 outside_vrf;
+
+} nat44_ei_config_t;
+
+typedef struct
+{
+  u32 translations;
+  u32 translation_buckets;
+  u32 user_buckets;
+
+  nat44_ei_config_t rconfig;
+
+} nat44_ei_main_t;
+
+int nat44_ei_plugin_enable (nat44_ei_config_t c);
+
+int nat44_ei_plugin_disable ();
 
 /**
  * @brief Delete specific NAT44 EI user and his sessions
@@ -71,6 +100,71 @@ void nat44_ei_set_alloc_mape (u16 psid, u16 psid_offset, u16 psid_length);
  */
 void nat44_ei_set_alloc_range (u16 start_port, u16 end_port);
 
+/**
+ * @brief Add/delete NAT44-EI static mapping
+ *
+ * @param l_addr       local IPv4 address
+ * @param e_addr       external IPv4 address
+ * @param l_port       local port number
+ * @param e_port       external port number
+ * @param proto        L4 protocol
+ * @param sw_if_index  use interface address as external IPv4 address
+ * @param vrf_id       local VRF ID
+ * @param addr_only    1 = 1:1NAT, 0 = 1:1NAPT
+ * @param identity_nat identity NAT
+ * @param tag opaque   string tag
+ * @param is_add       1 = add, 0 = delete
+ *
+ * @return 0 on success, non-zero value otherwise
+
+ */
+int nat44_ei_add_del_static_mapping (ip4_address_t l_addr,
+				     ip4_address_t e_addr, u16 l_port,
+				     u16 e_port, nat_protocol_t proto,
+				     u32 sw_if_index, u32 vrf_id, u8 addr_only,
+				     u8 identity_nat, u8 *tag, u8 is_add);
+
+/**
+ * @brief Delete NAT44-EI session
+ *
+ * @param addr   IPv4 address
+ * @param port   L4 port number
+ * @param proto  L4 protocol
+ * @param vrf_id VRF ID
+ * @param is_in  1 = inside network address and port pair, 0 = outside
+ *
+ * @return 0 on success, non-zero value otherwise
+ */
+int nat44_ei_del_session (snat_main_t *sm, ip4_address_t *addr, u16 port,
+			  nat_protocol_t proto, u32 vrf_id, int is_in);
+
+/**
+ * @brief Match NAT44-EI static mapping.
+ *
+ * @param key             address and port to match
+ * @param addr            external/local address of the matched mapping
+ * @param port            port of the matched mapping
+ * @param fib_index       fib index of the matched mapping
+ * @param by_external     if 0 match by local address otherwise match by
+ * external address
+ * @param is_addr_only    1 if matched mapping is address only
+ * @param is_identity_nat 1 if indentity mapping
+ *
+ * @returns 0 if match found otherwise 1.
+ */
+int nat44_ei_static_mapping_match (ip4_address_t match_addr, u16 match_port,
+				   u32 match_fib_index,
+				   nat_protocol_t match_protocol,
+				   ip4_address_t *mapping_addr,
+				   u16 *mapping_port, u32 *mapping_fib_index,
+				   u8 by_external, u8 *is_addr_only,
+				   u8 *is_identity_nat);
+
+/**
+ * @brief Clear all active NAT44-EI sessions.
+ */
+void nat44_ei_sessions_clear ();
+
 #endif /* __included_nat44_ei_h__ */
 /*
  * fd.io coding-style-patch-verification: ON