return 0;
}
+static_always_inline u8
+nat44_ed_maximum_sessions_exceeded (snat_main_t * sm,
+ u32 fib_index, u32 thread_index)
+{
+ 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];
+}
+
+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_close_timestamp = 0;
+ s->ha_last_refreshed = now;
+ return s;
+}
+
+static_always_inline void
+nat44_global_lru_insert (snat_main_per_thread_data_t * tsm,
+ snat_session_t * s, f64 now)
+{
+ dlist_elt_t *lru_list_elt;
+ pool_get (tsm->global_lru_pool, lru_list_elt);
+ s->global_lru_index = lru_list_elt - tsm->global_lru_pool;
+ clib_dlist_addtail (tsm->global_lru_pool, tsm->global_lru_head_index,
+ s->global_lru_index);
+ lru_list_elt->value = s - tsm->sessions;
+ s->last_lru_update = now;
+}
+
static_always_inline void
-nat44_session_cleanup (snat_session_t * s, u32 thread_index)
+nat44_sessions_clear ()
{
snat_main_t *sm = &snat_main;
+ snat_main_per_thread_data_t *tsm;
+
+ /* *INDENT-OFF* */
+ vec_foreach (tsm, sm->per_thread_data)
+ {
+ u32 ti;
- nat_free_session_data (sm, s, thread_index, 0);
- nat44_delete_session (sm, s, thread_index);
+ nat44_db_free (tsm);
+ nat44_db_init (tsm);
+
+ ti = tsm->snat_thread_index;
+ // clear per thread session counters
+ vlib_set_simple_counter (&sm->total_users, ti, 0, 0);
+ vlib_set_simple_counter (&sm->total_sessions, ti, 0, 0);
+ }
+ /* *INDENT-ON* */
}
static_always_inline void
{
s = pool_elt_at_index (tsm->sessions, elt->value);
elt = pool_elt_at_index (tsm->list_pool, elt->next);
- nat44_session_cleanup (s, thread_index);
+
+ nat44_free_session_data (sm, s, thread_index, 0);
+ nat44_delete_session (sm, s, thread_index);
}
}
snat_user_key_t user_key;
clib_bihash_kv_8_8_t kv, value;
+ if (sm->deterministic || 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;
return rv;
}
-static_always_inline void
-nat44_user_try_cleanup (snat_user_t * u, u32 thread_index, f64 now)
-{
- 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];
-
- // get head
- elt = pool_elt_at_index (tsm->list_pool,
- u->sessions_per_user_list_head_index);
- // get first element
- elt = pool_elt_at_index (tsm->list_pool, elt->next);
-
- while (elt->value != ~0)
- {
- 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);
- }
-}
-
-static_always_inline void
-nat44_session_try_cleanup (ip4_address_t * addr,
- u32 fib_index, u32 thread_index, f64 now)
-{
- snat_user_t *u = 0;
- 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];
-
- 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);
- }));
- }
- /* *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* */
- }
-}
-
#endif /* included_nat44_inlines_h__ */
/*
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