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)
-{
- snat_main_t *sm = &snat_main;
-
- nat_free_session_data (sm, s, thread_index, 0);
- nat44_delete_session (sm, s, thread_index);
-}
-
-static_always_inline void
-nat44_user_del_sessions (snat_user_t * u, u32 thread_index)
-{
- dlist_elt_t *elt;
- snat_session_t *s;
-
- 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);
- nat44_session_cleanup (s, thread_index);
- }
-}
-
-static_always_inline int
-nat44_user_del (ip4_address_t * addr, u32 fib_index)
-{
- 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;
-
- user_key.addr.as_u32 = addr->as_u32;
- user_key.fib_index = fib_index;
- kv.key = user_key.as_u64;
-
- if (sm->num_workers > 1)
- {
- /* *INDENT-OFF* */
- vec_foreach (tsm, sm->per_thread_data)
- {
- 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);
- 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;
-}
-
-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)
+static_always_inline u8
+nat44_ed_maximum_sessions_exceeded (snat_main_t * sm,
+ u32 fib_index, u32 thread_index)
{
- 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* */
- }
+ 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];
}
#endif /* included_nat44_inlines_h__ */
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