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-rw-r--r--src/plugins/nat/in2out_ed.c51
-rwxr-xr-xsrc/plugins/nat/nat.c93
-rw-r--r--test/test_nat.py19
3 files changed, 67 insertions, 96 deletions
diff --git a/src/plugins/nat/in2out_ed.c b/src/plugins/nat/in2out_ed.c
index f3999f00129..c42d4e79f9e 100644
--- a/src/plugins/nat/in2out_ed.c
+++ b/src/plugins/nat/in2out_ed.c
@@ -255,7 +255,8 @@ slow_path_ed (snat_main_t * sm,
u32 rx_fib_index,
clib_bihash_kv_16_8_t * kv,
snat_session_t ** sessionp,
- vlib_node_runtime_t * node, u32 next, u32 thread_index, f64 now)
+ vlib_node_runtime_t * node, u32 next, u32 thread_index, f64 now,
+ tcp_header_t * tcp)
{
snat_session_t *s = 0;
snat_user_t *u;
@@ -315,6 +316,15 @@ slow_path_ed (snat_main_t * sm,
is_sm = 1;
}
+ if (proto == SNAT_PROTOCOL_TCP)
+ {
+ if (!tcp_is_init (tcp))
+ {
+ b->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
+ return NAT_IN2OUT_ED_NEXT_DROP;
+ }
+ }
+
u = nat_user_get_or_create (sm, &key->l_addr, rx_fib_index, thread_index);
if (!u)
{
@@ -626,7 +636,7 @@ icmp_match_in2out_ed (snat_main_t * sm, vlib_node_runtime_t * node,
}
next = slow_path_ed (sm, b, rx_fib_index, &kv, &s, node, next,
- thread_index, vlib_time_now (sm->vlib_main));
+ thread_index, vlib_time_now (sm->vlib_main), 0);
if (PREDICT_FALSE (next == NAT_IN2OUT_ED_NEXT_DROP))
goto out;
@@ -1034,16 +1044,9 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm,
goto trace00;
}
- if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
- {
- b0->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
- next0 = NAT_IN2OUT_ED_NEXT_DROP;
- goto trace00;
- }
-
next0 =
slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node,
- next0, thread_index, now);
+ next0, thread_index, now, tcp0);
if (PREDICT_FALSE (next0 == NAT_IN2OUT_ED_NEXT_DROP))
goto trace00;
@@ -1245,16 +1248,9 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm,
goto trace01;
}
- if ((proto1 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp1))
- {
- b1->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
- next1 = NAT_IN2OUT_ED_NEXT_DROP;
- goto trace01;
- }
-
next1 =
slow_path_ed (sm, b1, rx_fib_index1, &kv1, &s1, node,
- next1, thread_index, now);
+ next1, thread_index, now, tcp1);
if (PREDICT_FALSE (next1 == NAT_IN2OUT_ED_NEXT_DROP))
goto trace01;
@@ -1485,16 +1481,9 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm,
goto trace0;
}
- if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
- {
- b0->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
- next0 = NAT_IN2OUT_ED_NEXT_DROP;
- goto trace0;
- }
-
next0 =
slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node,
- next0, thread_index, now);
+ next0, thread_index, now, tcp0);
if (PREDICT_FALSE (next0 == NAT_IN2OUT_ED_NEXT_DROP))
goto trace0;
@@ -1892,15 +1881,9 @@ nat44_ed_in2out_reass_node_fn_inline (vlib_main_t * vm,
}
}
- if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
- {
- b0->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
- next0 = NAT_IN2OUT_ED_NEXT_DROP;
- goto trace0;
- }
-
next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0,
- &s0, node, next0, thread_index, now);
+ &s0, node, next0, thread_index, now,
+ tcp0);
if (PREDICT_FALSE (next0 == NAT_IN2OUT_ED_NEXT_DROP))
goto trace0;
diff --git a/src/plugins/nat/nat.c b/src/plugins/nat/nat.c
index e7d59f78d08..b7ade881c3f 100755
--- a/src/plugins/nat/nat.c
+++ b/src/plugins/nat/nat.c
@@ -397,64 +397,67 @@ nat_ed_session_alloc (snat_main_t * sm, snat_user_t * u, u32 thread_index,
u32 oldest_index;
u64 sess_timeout_time;
- if ((u->nsessions + u->nstaticsessions) >= sm->max_translations_per_user)
+ if (PREDICT_FALSE (!(u->nsessions) && !(u->nstaticsessions)))
+ goto alloc_new;
+
+ 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)
{
- 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;
- }
+ 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);
+ if ((u->nsessions + u->nstaticsessions) >=
+ sm->max_translations_per_user)
{
- 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);
- clib_memset (s, 0, sizeof (*s));
+ else
+ {
+ alloc_new:
+ pool_get (tsm->sessions, s);
+ clib_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);
+ /* 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;
+ 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);
+ 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/test/test_nat.py b/test/test_nat.py
index 524301f302d..cf5cc63cc50 100644
--- a/test/test_nat.py
+++ b/test/test_nat.py
@@ -5658,7 +5658,7 @@ class TestNAT44EndpointDependent(MethodHolder):
pkts = []
for i in range(0, max_sessions):
- src = "10.10.%u.%u" % ((i & 0xFF00) >> 8, i & 0xFF)
+ src = "10.11.%u.%u" % ((i & 0xFF00) >> 8, i & 0xFF)
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IP(src=src, dst=self.pg1.remote_ip4) /
ICMP(id=1026, type='echo-request'))
@@ -5683,8 +5683,6 @@ class TestNAT44EndpointDependent(MethodHolder):
is_inside=0)
self.vapi.nat_set_timeouts(tcp_transitory=5)
- nat44_config = self.vapi.nat_show_config()
-
self.initiate_tcp_session(self.pg0, self.pg1)
p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
@@ -5695,18 +5693,6 @@ class TestNAT44EndpointDependent(MethodHolder):
self.pg_start()
self.pg1.get_capture(1)
- pkts_num = nat44_config.max_translations_per_user - 1
- pkts = []
- for i in range(0, pkts_num):
- p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
- IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
- UDP(sport=1025 + i, dport=53))
- pkts.append(p)
- self.pg0.add_stream(pkts)
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- self.pg1.get_capture(pkts_num)
-
sleep(6)
p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
@@ -5722,8 +5708,7 @@ class TestNAT44EndpointDependent(MethodHolder):
users = self.vapi.nat44_user_dump()
self.assertEqual(len(users), 1)
self.assertEqual(users[0].ip_address, self.pg0.remote_ip4n)
- self.assertEqual(users[0].nsessions,
- nat44_config.max_translations_per_user)
+ self.assertEqual(users[0].nsessions, 1)
@unittest.skipUnless(running_extended_tests(), "part of extended tests")
def test_session_limit_per_user(self):