NAT66 1:1 mapping (VPP-1108)

Support the 1:1 translation of source address for IPv6

Change-Id: I934d18e5ec508bf7422d796ee5f172b79c048011
Signed-off-by: Matus Fabian <matfabia@cisco.com>

1 files changed, 89 insertions, 0 deletions

diff --git a/src/plugins/nat/nat66.h b/src/plugins/nat/nat66.h
new file mode 100644
index 00000000000..d2ddd0c70e1
--- /dev/null
+++ b/src/plugins/nat/nat66.h
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * @file
+ * @brief NAT66 global declarations
+ */
+#ifndef __included_nat66_h__
+#define __included_nat66_h__
+
+#include <vppinfra/bihash_24_8.h>
+#include <nat/nat.h>
+
+typedef struct
+{
+  ip6_address_t l_addr;
+  ip6_address_t e_addr;
+  u32 fib_index;
+} nat66_static_mapping_t;
+
+typedef struct
+{
+  union
+  {
+    struct
+    {
+      ip6_address_t addr;
+      u32 fib_index;
+      u32 rsvd;
+    };
+    u64 as_u64[3];
+  };
+} nat66_sm_key_t;
+
+typedef struct
+{
+  /** Interface pool */
+  snat_interface_t *interfaces;
+  /** Static mapping pool */
+  nat66_static_mapping_t *sm;
+  /** Static mapping by local address lookup table */
+  clib_bihash_24_8_t sm_l;
+  /** Static mapping by external address lookup table */
+  clib_bihash_24_8_t sm_e;
+  /** Session counters */
+  vlib_combined_counter_main_t session_counters;
+} nat66_main_t;
+
+extern nat66_main_t nat66_main;
+extern vlib_node_registration_t nat66_in2out_node;
+extern vlib_node_registration_t nat66_out2in_node;
+
+void nat66_init (void);
+typedef int (*nat66_interface_walk_fn_t) (snat_interface_t * i, void *ctx);
+void nat66_interfaces_walk (nat66_interface_walk_fn_t fn, void *ctx);
+int nat66_interface_add_del (u32 sw_if_index, u8 is_inside, u8 is_add);
+typedef int (*nat66_static_mapping_walk_fn_t) (nat66_static_mapping_t * sm,
+					       void *ctx);
+void nat66_static_mappings_walk (nat66_static_mapping_walk_fn_t fn,
+				 void *ctx);
+nat66_static_mapping_t *nat66_static_mapping_get (ip6_address_t * addr,
+						  u32 fib_index, u8 is_local);
+int nat66_static_mapping_add_del (ip6_address_t * l_addr,
+				  ip6_address_t * e_addr, u32 vrf_id,
+				  u8 is_add);
+
+#define u8_ptr_add(ptr, index) (((u8 *)ptr) + index)
+#define u16_net_add(u, val) clib_host_to_net_u16(clib_net_to_host_u16(u) + (val))
+
+#endif /* __included_nat66_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */