diff options
Diffstat (limited to 'src/plugins/nat/in2out_ed.c')
| -rw-r--r-- | src/plugins/nat/in2out_ed.c | 45 |
1 files changed, 43 insertions, 2 deletions
diff --git a/src/plugins/nat/in2out_ed.c b/src/plugins/nat/in2out_ed.c index f9f8d776eb4..8c62949b07d 100644 --- a/src/plugins/nat/in2out_ed.c +++ b/src/plugins/nat/in2out_ed.c @@ -37,7 +37,8 @@ _(BAD_ICMP_TYPE, "unsupported ICMP type") \ _(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 { @@ -513,7 +514,19 @@ nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip, make_ed_kv (&kv, &ip->src_address, &ip->dst_address, proto, tx_fib_index, src_port, dst_port); if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value)) - return 1; + { + s = pool_elt_at_index (tsm->sessions, value.value); + if (nat44_is_ses_closed (s)) + { + nat_log_debug ("TCP close connection %U", format_snat_session, + &sm->per_thread_data[thread_index], s); + nat_free_session_data (sm, s, thread_index); + nat44_delete_session (sm, s, thread_index); + } + else + s->flags |= SNAT_SESSION_FLAG_OUTPUT_FEATURE; + return 1; + } /* dst NAT check */ make_ed_kv (&kv, &ip->dst_address, &ip->src_address, proto, rx_fib_index, @@ -1021,6 +1034,13 @@ 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); @@ -1225,6 +1245,13 @@ 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); @@ -1458,6 +1485,13 @@ 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); @@ -1858,6 +1892,13 @@ 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); |