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authorMatus Fabian <matfabia@cisco.com>2018-11-16 04:41:31 -0800
committerDamjan Marion <dmarion@me.com>2018-11-19 09:15:48 +0000
commit6c01dceea5c612373453db7f1ccda589a2cd782e (patch)
tree9e105928cf0ede85eef9c87920a1bc8e65e83502 /src/plugins/nat/out2in_ed.c
parentd30bf015ad3f7fbf206f143ed5d47a9af25148e8 (diff)
NAT44: fix bug in TCP close with output-feature interface (VPP-1493)
Change-Id: If8c883d6b1ee58de9a03012d3567ec82211a0225 Signed-off-by: Matus Fabian <matfabia@cisco.com>
Diffstat (limited to 'src/plugins/nat/out2in_ed.c')
-rw-r--r--src/plugins/nat/out2in_ed.c31
1 files changed, 30 insertions, 1 deletions
diff --git a/src/plugins/nat/out2in_ed.c b/src/plugins/nat/out2in_ed.c
index 55b34f5c2e8..aa7f7e40117 100644
--- a/src/plugins/nat/out2in_ed.c
+++ b/src/plugins/nat/out2in_ed.c
@@ -39,7 +39,8 @@ _(NO_TRANSLATION, "No translation") \
_(MAX_SESSIONS_EXCEEDED, "Maximum sessions exceeded") \
_(DROP_FRAGMENT, "Drop fragment") \
_(MAX_REASS, "Maximum reassemblies exceeded") \
-_(MAX_FRAG, "Maximum fragments per reassembly exceeded")
+_(MAX_FRAG, "Maximum fragments per reassembly exceeded")\
+_(NON_SYN, "non-SYN packet try to create session")
typedef enum
{
@@ -875,6 +876,13 @@ nat44_ed_out2in_node_fn_inline (vlib_main_t * vm,
if (PREDICT_FALSE (identity_nat0))
goto trace00;
+ if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
+ {
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto trace00;
+ }
+
/* Create session initiated by host from external network */
s0 = create_session_for_static_mapping_ed (sm, b0, l_key0,
e_key0, node,
@@ -1097,6 +1105,13 @@ nat44_ed_out2in_node_fn_inline (vlib_main_t * vm,
if (PREDICT_FALSE (identity_nat1))
goto trace01;
+ if ((proto1 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp1))
+ {
+ b1->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
+ next1 = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto trace01;
+ }
+
/* Create session initiated by host from external network */
s1 = create_session_for_static_mapping_ed (sm, b1, l_key1,
e_key1, node,
@@ -1353,6 +1368,13 @@ nat44_ed_out2in_node_fn_inline (vlib_main_t * vm,
if (PREDICT_FALSE (identity_nat0))
goto trace0;
+ if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
+ {
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto trace0;
+ }
+
/* Create session initiated by host from external network */
s0 = create_session_for_static_mapping_ed (sm, b0, l_key0,
e_key0, node,
@@ -1702,6 +1724,13 @@ nat44_ed_out2in_reass_node_fn (vlib_main_t * vm,
goto trace0;
}
+ if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
+ {
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto trace0;
+ }
+
/* Create session initiated by host from external network */
s0 = create_session_for_static_mapping_ed (sm, b0, l_key0,
e_key0, node,