NAT64: IPFix (VPP-1106)

Change-Id: Ib90dc5613c9fdac0344b3bd7f163e2f7163c64d8
Signed-off-by: Matus Fabian <matfabia@cisco.com>

1 files changed, 62 insertions, 1 deletions

diff --git a/src/plugins/nat/nat64_db.c b/src/plugins/nat/nat64_db.c
index 7ce28bc6c7f..3edc1a43006 100644
--- a/src/plugins/nat/nat64_db.c
+++ b/src/plugins/nat/nat64_db.c
@@ -17,6 +17,8 @@
  * @brief NAT64 DB
  */
 #include <nat/nat64_db.h>
+#include <nat/nat_ipfix_logging.h>
+#include <vnet/fib/fib_table.h>
 
 int
 nat64_db_init (nat64_db_t * db, u32 bib_buckets, u32 bib_memory_size,
@@ -36,6 +38,12 @@ nat64_db_init (nat64_db_t * db, u32 bib_buckets, u32 bib_memory_size,
 			 st_memory_size);
 
   db->free_addr_port_cb = free_addr_port_cb;
+  db->bib.limit = 10 * bib_buckets;
+  db->bib.bib_entries_num = 0;
+  db->st.limit = 10 * st_buckets;
+  db->st.st_entries_num = 0;
+  db->addr_free = 0;
+
   return 0;
 }
 
@@ -48,6 +56,14 @@ nat64_db_bib_entry_create (nat64_db_t * db, ip6_address_t * in_addr,
   nat64_db_bib_entry_t *bibe;
   nat64_db_bib_entry_key_t bibe_key;
   clib_bihash_kv_24_8_t kv;
+  fib_table_t *fib;
+
+  if (db->bib.bib_entries_num >= db->bib.limit)
+    {
+      db->free_addr_port_cb (db, out_addr, out_port, proto);
+      nat_ipfix_logging_max_bibs (db->bib.limit);
+      return 0;
+    }
 
   /* create pool entry */
   switch (ip_proto_to_snat_proto (proto))
@@ -66,6 +82,9 @@ nat64_db_bib_entry_create (nat64_db_t * db, ip6_address_t * in_addr,
       kv.value = bibe - db->bib._unk_proto_bib;
       break;
     }
+
+  db->bib.bib_entries_num++;
+
   memset (bibe, 0, sizeof (*bibe));
   bibe->in_addr.as_u64[0] = in_addr->as_u64[0];
   bibe->in_addr.as_u64[1] = in_addr->as_u64[1];
@@ -97,6 +116,9 @@ nat64_db_bib_entry_create (nat64_db_t * db, ip6_address_t * in_addr,
   kv.key[2] = bibe_key.as_u64[2];
   clib_bihash_add_del_24_8 (&db->bib.out2in, &kv, 1);
 
+  fib = fib_table_get (bibe->fib_index, FIB_PROTOCOL_IP6);
+  nat_ipfix_logging_nat64_bib (in_addr, out_addr, proto, in_port, out_port,
+			       fib->ft_table_id, 1);
   return bibe;
 }
 
@@ -108,6 +130,7 @@ nat64_db_bib_entry_free (nat64_db_t * db, nat64_db_bib_entry_t * bibe)
   nat64_db_bib_entry_t *bib;
   u32 *ste_to_be_free = 0, *ste_index, bibe_index;
   nat64_db_st_entry_t *st, *ste;
+  fib_table_t *fib;
 
   switch (ip_proto_to_snat_proto (bibe->proto))
     {
@@ -126,6 +149,8 @@ nat64_db_bib_entry_free (nat64_db_t * db, nat64_db_bib_entry_t * bibe)
       break;
     }
 
+  db->bib.bib_entries_num--;
+
   bibe_index = bibe - bib;
 
   /* delete ST entries for static BIB entry */
@@ -162,7 +187,14 @@ nat64_db_bib_entry_free (nat64_db_t * db, nat64_db_bib_entry_t * bibe)
   kv.key[2] = bibe_key.as_u64[2];
   clib_bihash_add_del_24_8 (&db->bib.out2in, &kv, 0);
 
-  db->free_addr_port_cb (db, &bibe->out_addr, bibe->out_port, bibe->proto);
+  if (!db->addr_free)
+    db->free_addr_port_cb (db, &bibe->out_addr, bibe->out_port, bibe->proto);
+
+  fib = fib_table_get (bibe->fib_index, FIB_PROTOCOL_IP6);
+  nat_ipfix_logging_nat64_bib (&bibe->in_addr, &bibe->out_addr, bibe->proto,
+			       bibe->in_port, bibe->out_port,
+			       fib->ft_table_id, 0);
+
   /* delete from pool */
   pool_put (bib, bibe);
 
@@ -344,6 +376,13 @@ nat64_db_st_entry_create (nat64_db_t * db, nat64_db_bib_entry_t * bibe,
   nat64_db_bib_entry_t *bib;
   nat64_db_st_entry_key_t ste_key;
   clib_bihash_kv_48_8_t kv;
+  fib_table_t *fib;
+
+  if (db->st.st_entries_num >= db->st.limit)
+    {
+      nat_ipfix_logging_max_sessions (db->st.limit);
+      return 0;
+    }
 
   /* create pool entry */
   switch (ip_proto_to_snat_proto (bibe->proto))
@@ -364,6 +403,9 @@ nat64_db_st_entry_create (nat64_db_t * db, nat64_db_bib_entry_t * bibe,
       bib = db->bib._unk_proto_bib;
       break;
     }
+
+  db->st.st_entries_num++;
+
   memset (ste, 0, sizeof (*ste));
   ste->in_r_addr.as_u64[0] = in_r_addr->as_u64[0];
   ste->in_r_addr.as_u64[1] = in_r_addr->as_u64[1];
@@ -407,6 +449,13 @@ nat64_db_st_entry_create (nat64_db_t * db, nat64_db_bib_entry_t * bibe,
   kv.key[5] = ste_key.as_u64[5];
   clib_bihash_add_del_48_8 (&db->st.out2in, &kv, 1);
 
+  fib = fib_table_get (bibe->fib_index, FIB_PROTOCOL_IP6);
+  nat_ipfix_logging_nat64_session (&bibe->in_addr, &bibe->out_addr,
+				   bibe->proto, bibe->in_port, bibe->out_port,
+				   &ste->in_r_addr, &ste->out_r_addr,
+				   ste->r_port, ste->r_port, fib->ft_table_id,
+				   1);
+
   return ste;
 }
 
@@ -417,6 +466,7 @@ nat64_db_st_entry_free (nat64_db_t * db, nat64_db_st_entry_t * ste)
   nat64_db_bib_entry_t *bib, *bibe;
   nat64_db_st_entry_key_t ste_key;
   clib_bihash_kv_48_8_t kv;
+  fib_table_t *fib;
 
   switch (ip_proto_to_snat_proto (ste->proto))
     {
@@ -437,6 +487,8 @@ nat64_db_st_entry_free (nat64_db_t * db, nat64_db_st_entry_t * ste)
 
   bibe = pool_elt_at_index (bib, ste->bibe_index);
 
+  db->st.st_entries_num--;
+
   /* delete hash lookup */
   memset (&ste_key, 0, sizeof (ste_key));
   ste_key.l_addr.as_u64[0] = bibe->in_addr.as_u64[0];
@@ -469,6 +521,13 @@ nat64_db_st_entry_free (nat64_db_t * db, nat64_db_st_entry_t * ste)
   kv.key[5] = ste_key.as_u64[5];
   clib_bihash_add_del_48_8 (&db->st.out2in, &kv, 0);
 
+  fib = fib_table_get (bibe->fib_index, FIB_PROTOCOL_IP6);
+  nat_ipfix_logging_nat64_session (&bibe->in_addr, &bibe->out_addr,
+				   bibe->proto, bibe->in_port, bibe->out_port,
+				   &ste->in_r_addr, &ste->out_r_addr,
+				   ste->r_port, ste->r_port, fib->ft_table_id,
+				   0);
+
   /* delete from pool */
   pool_put (st, ste);
 
@@ -613,6 +672,7 @@ nat64_db_free_out_addr (nat64_db_t * db, ip4_address_t * out_addr)
   nat64_db_st_entry_t *st, *ste;
   nat64_db_bib_entry_t *bibe;
 
+  db->addr_free = 1;
 /* *INDENT-OFF* */
 #define _(N, i, n, s) \
   st = db->st._##n##_st; \
@@ -636,6 +696,7 @@ nat64_db_free_out_addr (nat64_db_t * db, ip4_address_t * out_addr)
   vec_foreach (ste_index, ste_to_be_free)
     nat64_db_st_entry_free (db, pool_elt_at_index(st, ste_index[0]));
   vec_free (ste_to_be_free);
+  db->addr_free = 0;
 /* *INDENT-ON* */
 }