diff options
Diffstat (limited to 'src/plugins/nat/out2in.c')
| -rwxr-xr-x | src/plugins/nat/out2in.c | 77 |
1 files changed, 56 insertions, 21 deletions
diff --git a/src/plugins/nat/out2in.c b/src/plugins/nat/out2in.c index 6472e7ff50c..e5426c1a80e 100755 --- a/src/plugins/nat/out2in.c +++ b/src/plugins/nat/out2in.c @@ -87,7 +87,8 @@ vlib_node_registration_t snat_det_out2in_node; _(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \ _(OUT2IN_PACKETS, "Good out2in packets processed") \ _(BAD_ICMP_TYPE, "unsupported ICMP type") \ -_(NO_TRANSLATION, "No translation") +_(NO_TRANSLATION, "No translation") \ +_(MAX_SESSIONS_EXCEEDED, "Maximum sessions exceeded") typedef enum { #define _(sym,str) SNAT_OUT2IN_ERROR_##sym, @@ -139,6 +140,12 @@ create_session_for_static_mapping (snat_main_t *sm, dlist_elt_t * per_user_list_head_elt; ip4_header_t *ip0; + if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index))) + { + b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_SESSIONS_EXCEEDED]; + return 0; + } + ip0 = vlib_buffer_get_current (b0); user_key.addr = in2out.addr; @@ -620,14 +627,15 @@ static inline u32 icmp_out2in_slow_path (snat_main_t *sm, return next0; } -static void +static snat_session_t * snat_out2in_unknown_proto (snat_main_t *sm, vlib_buffer_t * b, ip4_header_t * ip, u32 rx_fib_index, u32 thread_index, f64 now, - vlib_main_t * vm) + vlib_main_t * vm, + vlib_node_runtime_t * node) { clib_bihash_kv_8_8_t kv, value; clib_bihash_kv_16_8_t s_kv, s_value; @@ -660,13 +668,22 @@ snat_out2in_unknown_proto (snat_main_t *sm, } else { + if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index))) + { + b->error = node->errors[SNAT_OUT2IN_ERROR_MAX_SESSIONS_EXCEEDED]; + return 0; + } + m_key.addr = ip->dst_address; m_key.port = 0; m_key.protocol = 0; m_key.fib_index = rx_fib_index; kv.key = m_key.as_u64; if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) - return; + { + b->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + return 0; + } m = pool_elt_at_index (sm->static_mappings, value.value); @@ -753,6 +770,8 @@ snat_out2in_unknown_proto (snat_main_t *sm, clib_dlist_remove (tsm->list_pool, s->per_user_index); clib_dlist_addtail (tsm->list_pool, s->per_user_list_head_index, s->per_user_index); + + return s; } static snat_session_t * @@ -762,7 +781,8 @@ snat_out2in_lb (snat_main_t *sm, u32 rx_fib_index, u32 thread_index, f64 now, - vlib_main_t * vm) + vlib_main_t * vm, + vlib_node_runtime_t * node) { nat_ed_ses_key_t key; clib_bihash_kv_16_8_t s_kv, s_value; @@ -797,6 +817,12 @@ snat_out2in_lb (snat_main_t *sm, } else { + if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index))) + { + b->error = node->errors[SNAT_OUT2IN_ERROR_MAX_SESSIONS_EXCEEDED]; + return 0; + } + e_key.addr = ip->dst_address; e_key.port = udp->dst_port; e_key.protocol = proto; @@ -998,8 +1024,10 @@ snat_out2in_node_fn (vlib_main_t * vm, if (PREDICT_FALSE (proto0 == ~0)) { - snat_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0, - thread_index, now, vm); + s0 = snat_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0, + thread_index, now, vm, node); + if (!s0) + next0 = SNAT_OUT2IN_NEXT_DROP; goto trace0; } @@ -1042,7 +1070,6 @@ snat_out2in_node_fn (vlib_main_t * vm, thread_index); if (!s0) { - b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; next0 = SNAT_OUT2IN_NEXT_DROP; goto trace0; } @@ -1051,8 +1078,10 @@ snat_out2in_node_fn (vlib_main_t * vm, { if (PREDICT_FALSE (value0.value == ~0ULL)) { - s0 = snat_out2in_lb(sm, b0, ip0, rx_fib_index0, thread_index, now, - vm); + s0 = snat_out2in_lb(sm, b0, ip0, rx_fib_index0, thread_index, + now, vm, node); + if (!s0) + next0 = SNAT_OUT2IN_NEXT_DROP; goto trace0; } else @@ -1150,8 +1179,10 @@ snat_out2in_node_fn (vlib_main_t * vm, if (PREDICT_FALSE (proto1 == ~0)) { - snat_out2in_unknown_proto(sm, b1, ip1, rx_fib_index1, - thread_index, now, vm); + s1 = snat_out2in_unknown_proto(sm, b1, ip1, rx_fib_index1, + thread_index, now, vm, node); + if (!s1) + next1 = SNAT_OUT2IN_NEXT_DROP; goto trace1; } @@ -1194,7 +1225,6 @@ snat_out2in_node_fn (vlib_main_t * vm, thread_index); if (!s1) { - b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; next1 = SNAT_OUT2IN_NEXT_DROP; goto trace1; } @@ -1203,8 +1233,10 @@ snat_out2in_node_fn (vlib_main_t * vm, { if (PREDICT_FALSE (value1.value == ~0ULL)) { - s1 = snat_out2in_lb(sm, b1, ip1, rx_fib_index1, thread_index, now, - vm); + s1 = snat_out2in_lb(sm, b1, ip1, rx_fib_index1, thread_index, + now, vm, node); + if (!s1) + next1 = SNAT_OUT2IN_NEXT_DROP; goto trace1; } else @@ -1328,8 +1360,10 @@ snat_out2in_node_fn (vlib_main_t * vm, if (PREDICT_FALSE (proto0 == ~0)) { - snat_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0, - thread_index, now, vm); + s0 = snat_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0, + thread_index, now, vm, node); + if (!s0) + next0 = SNAT_OUT2IN_NEXT_DROP; goto trace00; } @@ -1383,8 +1417,7 @@ snat_out2in_node_fn (vlib_main_t * vm, thread_index); if (!s0) { - b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next0 = SNAT_OUT2IN_NEXT_DROP; + next0 = SNAT_OUT2IN_NEXT_DROP; goto trace00; } } @@ -1392,8 +1425,10 @@ snat_out2in_node_fn (vlib_main_t * vm, { if (PREDICT_FALSE (value0.value == ~0ULL)) { - s0 = snat_out2in_lb(sm, b0, ip0, rx_fib_index0, thread_index, now, - vm); + s0 = snat_out2in_lb(sm, b0, ip0, rx_fib_index0, thread_index, + now, vm, node); + if (!s0) + next0 = SNAT_OUT2IN_NEXT_DROP; goto trace00; } else |