nat: move deterministic nat to det44 sub feature

[vpp.git] / src / plugins / nat / nat44 / inlines.h

diff --git a/src/plugins/nat/nat44/inlines.h b/src/plugins/nat/nat44/inlines.h
index 52dd37c..459bada 100644 (file)
--- a/src/plugins/nat/nat44/inlines.h
+++ b/src/plugins/nat/nat44/inlines.h
@@ -26,26 +26,49 @@ static_always_inline u8
 nat44_maximum_sessions_exceeded (snat_main_t * sm, u32 thread_index)
 {
   if (pool_elts (sm->per_thread_data[thread_index].sessions) >=
-      sm->max_translations)
+      sm->max_translations_per_thread)
     return 1;
   return 0;
 }
 
-static_always_inline void
-nat44_session_cleanup (snat_session_t * s, u32 thread_index)
+static_always_inline u8
+nat44_ed_maximum_sessions_exceeded (snat_main_t * sm,
+                                   u32 fib_index, u32 thread_index)
 {
-  snat_main_t *sm = &snat_main;
+  u32 translations;
+  translations = pool_elts (sm->per_thread_data[thread_index].sessions);
+  if (vec_len (sm->max_translations_per_fib) <= fib_index)
+    fib_index = 0;
+  return translations >= sm->max_translations_per_fib[fib_index];
+}
 
-  nat_free_session_data (sm, s, thread_index, 0);
-  nat44_delete_session (sm, s, thread_index);
+static_always_inline snat_session_t *
+nat44_session_reuse_old (snat_main_t * sm, snat_user_t * u,
+                        snat_session_t * s, u32 thread_index, f64 now)
+{
+  nat44_free_session_data (sm, s, thread_index, 0);
+  if (snat_is_session_static (s))
+    u->nstaticsessions--;
+  else
+    u->nsessions--;
+  s->flags = 0;
+  s->total_bytes = 0;
+  s->total_pkts = 0;
+  s->state = 0;
+  s->ext_host_addr.as_u32 = 0;
+  s->ext_host_port = 0;
+  s->ext_host_nat_addr.as_u32 = 0;
+  s->ext_host_nat_port = 0;
+  s->tcp_closed_timestamp = 0;
+  s->ha_last_refreshed = now;
+  return s;
 }
 
 static_always_inline void
-nat44_user_try_cleanup (snat_user_t * u, u32 thread_index, f64 now)
+nat44_user_del_sessions (snat_user_t * u, u32 thread_index)
 {
   dlist_elt_t *elt;
   snat_session_t *s;
-  u64 sess_timeout_time;
 
   snat_main_t *sm = &snat_main;
   snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
@@ -61,106 +84,57 @@ nat44_user_try_cleanup (snat_user_t * u, u32 thread_index, f64 now)
       s = pool_elt_at_index (tsm->sessions, elt->value);
       elt = pool_elt_at_index (tsm->list_pool, elt->next);
 
-      sess_timeout_time = s->last_heard +
-       (f64) nat44_session_get_timeout (sm, s);
-
-      if (now < sess_timeout_time)
-       {
-         tsm->min_session_timeout =
-           clib_min (sess_timeout_time, tsm->min_session_timeout);
-         continue;
-       }
-
-      nat44_session_cleanup (s, thread_index);
+      nat44_free_session_data (sm, s, thread_index, 0);
+      nat44_delete_session (sm, s, thread_index);
     }
 }
 
-static_always_inline void
-nat44_session_try_cleanup (ip4_address_t * addr,
-                          u32 fib_index, u32 thread_index, f64 now)
+static_always_inline int
+nat44_user_del (ip4_address_t * addr, u32 fib_index)
 {
-  snat_user_t *u = 0;
+  int rv = 1;
+
+  snat_main_t *sm = &snat_main;
+  snat_main_per_thread_data_t *tsm;
+
   snat_user_key_t user_key;
   clib_bihash_kv_8_8_t kv, value;
 
-  snat_main_t *sm = &snat_main;
-  snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+  if (sm->endpoint_dependent)
+    return rv;
 
   user_key.addr.as_u32 = addr->as_u32;
   user_key.fib_index = fib_index;
   kv.key = user_key.as_u64;
 
-  // lookup user for this traffic
-  if (PREDICT_FALSE (clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value)))
-    {
-      // there is still place and a new user can be created
-      if (PREDICT_TRUE (pool_elts (tsm->sessions) < sm->max_translations))
-       return;
-
-      if (now >= tsm->min_session_timeout)
-       {
-         tsm->min_session_timeout = ~0;
-         // there is no place so we try to cleanup all users in this thread
-          /* *INDENT-OFF* */
-          pool_foreach (u, tsm->users,
-                        ({ nat44_user_try_cleanup (u, thread_index, now); }));
-          /* *INDENT-ON* */
-         if (~0 == tsm->min_session_timeout)
-           {
-             tsm->min_session_timeout = 0;
-           }
-       }
-      return;
-    }
-
-  if (now >= tsm->min_session_timeout)
-    {
-      tsm->min_session_timeout = ~0;
-      // each time user creates a new session we try to cleanup expired sessions
-      nat44_user_try_cleanup (pool_elt_at_index (tsm->users, value.value),
-                             thread_index, now);
-      if (~0 == tsm->min_session_timeout)
-       {
-         tsm->min_session_timeout = 0;
-       }
-    }
-}
-
-static_always_inline void
-nat44_force_session_cleanup (void)
-{
-  snat_user_t *u = 0;
-
-  snat_main_t *sm = &snat_main;
-  snat_main_per_thread_data_t *tsm;
-
-  vlib_main_t *vm = vlib_get_main ();
-  f64 now = vlib_time_now (vm);
-
-  // TODO: consider own timeouts
-
   if (sm->num_workers > 1)
     {
       /* *INDENT-OFF* */
       vec_foreach (tsm, sm->per_thread_data)
         {
-          pool_foreach (u, tsm->users,
-          ({
-            nat44_user_try_cleanup (u, tsm->thread_index, now);
-          }));
+          if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
+            {
+              nat44_user_del_sessions (
+                  pool_elt_at_index (tsm->users, value.value),
+                  tsm->thread_index);
+              rv = 0;
+              break;
+            }
         }
       /* *INDENT-ON* */
     }
   else
     {
       tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
-      /* *INDENT-OFF* */
-      pool_foreach (u, tsm->users,
-      ({
-        nat44_user_try_cleanup (u, tsm->thread_index, now);
-      }));
-      /* *INDENT-ON* */
+      if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
+       {
+         nat44_user_del_sessions (pool_elt_at_index
+                                  (tsm->users, value.value),
+                                  tsm->thread_index);
+         rv = 0;
+       }
     }
+  return rv;
 }
 
 #endif /* included_nat44_inlines_h__ */