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authorMatus Fabian <matfabia@cisco.com>2018-09-24 04:41:28 -0700
committerDamjan Marion <dmarion@me.com>2018-09-24 21:38:05 +0000
commit8fdc015ddde7620d37d5a46cc66deb9791e634c1 (patch)
tree1640330d85793cccadcda386c6f1a1b08f5a8eaa /src/plugins/nat
parent3138d723091234a3534baa8b1bbaad31df6fb8d6 (diff)
NAT44: endpoint-dependent mode session timeout improvement (VPP-1423)
Change-Id: I630f3da1ea4e6e50a50f1352c097becef1efe3c0 Signed-off-by: Matus Fabian <matfabia@cisco.com>
Diffstat (limited to 'src/plugins/nat')
-rw-r--r--src/plugins/nat/in2out_ed.c4
-rwxr-xr-xsrc/plugins/nat/nat.c78
-rw-r--r--src/plugins/nat/nat.h2
-rw-r--r--src/plugins/nat/out2in_ed.c6
4 files changed, 63 insertions, 27 deletions
diff --git a/src/plugins/nat/in2out_ed.c b/src/plugins/nat/in2out_ed.c
index d4f70f5a12b..77630268047 100644
--- a/src/plugins/nat/in2out_ed.c
+++ b/src/plugins/nat/in2out_ed.c
@@ -315,7 +315,7 @@ slow_path_ed (snat_main_t * sm,
return NAT_IN2OUT_ED_NEXT_DROP;
}
- s = nat_ed_session_alloc (sm, u, thread_index);
+ s = nat_ed_session_alloc (sm, u, thread_index, now);
if (!s)
{
nat44_delete_user_with_no_session (sm, u, thread_index);
@@ -777,7 +777,7 @@ nat44_ed_in2out_unknown_proto (snat_main_t * sm,
}
create_ses:
- s = nat_ed_session_alloc (sm, u, thread_index);
+ s = nat_ed_session_alloc (sm, u, thread_index, now);
if (!s)
{
nat44_delete_user_with_no_session (sm, u, thread_index);
diff --git a/src/plugins/nat/nat.c b/src/plugins/nat/nat.c
index efca4404ddd..0818332eeb3 100755
--- a/src/plugins/nat/nat.c
+++ b/src/plugins/nat/nat.c
@@ -388,37 +388,73 @@ nat_session_alloc_or_recycle (snat_main_t * sm, snat_user_t * u,
}
snat_session_t *
-nat_ed_session_alloc (snat_main_t * sm, snat_user_t * u, u32 thread_index)
+nat_ed_session_alloc (snat_main_t * sm, snat_user_t * u, u32 thread_index,
+ f64 now)
{
snat_session_t *s;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- dlist_elt_t *per_user_translation_list_elt;
+ dlist_elt_t *per_user_translation_list_elt, *oldest_elt;
+ u32 oldest_index;
+ u64 sess_timeout_time;
if ((u->nsessions + u->nstaticsessions) >= sm->max_translations_per_user)
{
- nat_log_warn ("max translations per user %U", format_ip4_address,
- &u->addr);
- snat_ipfix_logging_max_entries_per_user (sm->max_translations_per_user,
- u->addr.as_u32);
- return 0;
+ oldest_index =
+ clib_dlist_remove_head (tsm->list_pool,
+ u->sessions_per_user_list_head_index);
+ oldest_elt = pool_elt_at_index (tsm->list_pool, oldest_index);
+ s = pool_elt_at_index (tsm->sessions, oldest_elt->value);
+ sess_timeout_time =
+ s->last_heard + (f64) nat44_session_get_timeout (sm, s);
+ if (now >= sess_timeout_time)
+ {
+ clib_dlist_addtail (tsm->list_pool,
+ u->sessions_per_user_list_head_index,
+ oldest_index);
+ nat_free_session_data (sm, s, thread_index);
+ 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;
+ }
+ else
+ {
+ clib_dlist_addhead (tsm->list_pool,
+ u->sessions_per_user_list_head_index,
+ oldest_index);
+ nat_log_warn ("max translations per user %U", format_ip4_address,
+ &u->addr);
+ snat_ipfix_logging_max_entries_per_user
+ (sm->max_translations_per_user, u->addr.as_u32);
+ return 0;
+ }
}
+ else
+ {
+ pool_get (tsm->sessions, s);
+ memset (s, 0, sizeof (*s));
- pool_get (tsm->sessions, s);
- memset (s, 0, sizeof (*s));
-
- /* Create list elts */
- pool_get (tsm->list_pool, per_user_translation_list_elt);
- clib_dlist_init (tsm->list_pool,
- per_user_translation_list_elt - tsm->list_pool);
-
- per_user_translation_list_elt->value = s - tsm->sessions;
- s->per_user_index = per_user_translation_list_elt - tsm->list_pool;
- s->per_user_list_head_index = u->sessions_per_user_list_head_index;
+ /* Create list elts */
+ pool_get (tsm->list_pool, per_user_translation_list_elt);
+ clib_dlist_init (tsm->list_pool,
+ per_user_translation_list_elt - tsm->list_pool);
- clib_dlist_addtail (tsm->list_pool,
- s->per_user_list_head_index,
- per_user_translation_list_elt - tsm->list_pool);
+ per_user_translation_list_elt->value = s - tsm->sessions;
+ s->per_user_index = per_user_translation_list_elt - tsm->list_pool;
+ s->per_user_list_head_index = u->sessions_per_user_list_head_index;
+ clib_dlist_addtail (tsm->list_pool,
+ s->per_user_list_head_index,
+ per_user_translation_list_elt - tsm->list_pool);
+ }
return s;
}
diff --git a/src/plugins/nat/nat.h b/src/plugins/nat/nat.h
index 865d27efb5a..1baf10ff43c 100644
--- a/src/plugins/nat/nat.h
+++ b/src/plugins/nat/nat.h
@@ -933,7 +933,7 @@ snat_session_t *nat_session_alloc_or_recycle (snat_main_t * sm,
* @return session data structure on success otherwise zero value
*/
snat_session_t *nat_ed_session_alloc (snat_main_t * sm, snat_user_t * u,
- u32 thread_index);
+ u32 thread_index, f64 now);
/**
* @brief Set address and port assignment algorithm for MAP-E CE
diff --git a/src/plugins/nat/out2in_ed.c b/src/plugins/nat/out2in_ed.c
index 4236285df8d..ef772334292 100644
--- a/src/plugins/nat/out2in_ed.c
+++ b/src/plugins/nat/out2in_ed.c
@@ -233,7 +233,7 @@ create_session_for_static_mapping_ed (snat_main_t * sm,
return 0;
}
- s = nat_ed_session_alloc (sm, u, thread_index);
+ s = nat_ed_session_alloc (sm, u, thread_index, now);
if (!s)
{
nat44_delete_user_with_no_session (sm, u, thread_index);
@@ -421,7 +421,7 @@ create_bypass_for_fwd (snat_main_t * sm, ip4_header_t * ip, u32 rx_fib_index,
return;
}
- s = nat_ed_session_alloc (sm, u, thread_index);
+ s = nat_ed_session_alloc (sm, u, thread_index, now);
if (!s)
{
nat44_delete_user_with_no_session (sm, u, thread_index);
@@ -623,7 +623,7 @@ nat44_ed_out2in_unknown_proto (snat_main_t * sm,
}
/* Create a new session */
- s = nat_ed_session_alloc (sm, u, thread_index);
+ s = nat_ed_session_alloc (sm, u, thread_index, now);
if (!s)
{
nat44_delete_user_with_no_session (sm, u, thread_index);