diff options
Diffstat (limited to 'src/plugins/nat/out2in_ed.c')
| -rw-r--r-- | src/plugins/nat/out2in_ed.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/src/plugins/nat/out2in_ed.c b/src/plugins/nat/out2in_ed.c index b2dbc513df6..b4ae6502e0d 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, |