diff options
Diffstat (limited to 'src/plugins/nat/in2out.c')
| -rwxr-xr-x | src/plugins/nat/in2out.c | 217 |
1 files changed, 184 insertions, 33 deletions
diff --git a/src/plugins/nat/in2out.c b/src/plugins/nat/in2out.c index ac0490f36e9..9c8b2c6c5e5 100755 --- a/src/plugins/nat/in2out.c +++ b/src/plugins/nat/in2out.c @@ -311,6 +311,43 @@ nat_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip0, return 0; } +int +nat44_i2o_is_idle_session_cb (clib_bihash_kv_8_8_t * kv, void * arg) +{ + snat_main_t *sm = &snat_main; + nat44_is_idle_session_ctx_t *ctx = arg; + snat_session_t *s; + u64 sess_timeout_time; + snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data, + ctx->thread_index); + clib_bihash_kv_8_8_t s_kv; + + s = pool_elt_at_index (tsm->sessions, kv->value); + sess_timeout_time = s->last_heard + (f64)nat44_session_get_timeout(sm, s); + if (ctx->now >= sess_timeout_time) + { + s_kv.key = s->out2in.as_u64; + if (clib_bihash_add_del_8_8 (&tsm->out2in, &s_kv, 0)) + nat_log_warn ("out2in key del failed"); + + snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32, + s->out2in.addr.as_u32, + s->in2out.protocol, + s->in2out.port, + s->out2in.port, + s->in2out.fib_index); + + if (!snat_is_session_static (s)) + snat_free_outside_address_and_port (sm->addresses, ctx->thread_index, + &s->out2in); + + nat44_delete_session (sm, s, ctx->thread_index); + return 1; + } + + return 0; +} + static u32 slow_path (snat_main_t *sm, vlib_buffer_t *b0, ip4_header_t * ip0, u32 rx_fib_index0, @@ -318,7 +355,8 @@ static u32 slow_path (snat_main_t *sm, vlib_buffer_t *b0, snat_session_t ** sessionp, vlib_node_runtime_t * node, u32 next0, - u32 thread_index) + u32 thread_index, + f64 now) { snat_user_t *u; snat_session_t *s; @@ -336,6 +374,7 @@ static u32 slow_path (snat_main_t *sm, vlib_buffer_t *b0, .ip4.as_u32 = ip0->dst_address.as_u32, }, }; + nat44_is_idle_session_ctx_t ctx0; if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index))) { @@ -416,17 +455,21 @@ static u32 slow_path (snat_main_t *sm, vlib_buffer_t *b0, *sessionp = s; /* Add to translation hashes */ + ctx0.now = now; + ctx0.thread_index = thread_index; kv0.key = s->in2out.as_u64; kv0.value = s - sm->per_thread_data[thread_index].sessions; - if (clib_bihash_add_del_8_8 (&sm->per_thread_data[thread_index].in2out, &kv0, - 1 /* is_add */)) + if (clib_bihash_add_or_overwrite_stale_8_8 ( + &sm->per_thread_data[thread_index].in2out, &kv0, + nat44_i2o_is_idle_session_cb, &ctx0)) nat_log_notice ("in2out key add failed"); kv0.key = s->out2in.as_u64; kv0.value = s - sm->per_thread_data[thread_index].sessions; - if (clib_bihash_add_del_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0, - 1 /* is_add */)) + if (clib_bihash_add_or_overwrite_stale_8_8 ( + &sm->per_thread_data[thread_index].out2in, &kv0, + nat44_o2i_is_idle_session_cb, &ctx0)) nat_log_notice ("out2in key add failed"); /* log NAT event */ @@ -558,8 +601,8 @@ u32 icmp_match_in2out_slow(snat_main_t *sm, vlib_node_runtime_t *node, goto out; } - next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0, - &s0, node, next0, thread_index); + next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0, &s0, node, next0, + thread_index, vlib_time_now (sm->vlib_main)); if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP)) goto out; @@ -1252,7 +1295,7 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, } next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0, - &s0, node, next0, thread_index); + &s0, node, next0, thread_index, now); if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP)) goto trace00; } @@ -1412,7 +1455,7 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, } next1 = slow_path (sm, b1, ip1, rx_fib_index1, &key1, - &s1, node, next1, thread_index); + &s1, node, next1, thread_index, now); if (PREDICT_FALSE (next1 == SNAT_IN2OUT_NEXT_DROP)) goto trace01; } @@ -1608,7 +1651,7 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, } next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0, - &s0, node, next0, thread_index); + &s0, node, next0, thread_index, now); if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP)) goto trace0; @@ -2156,7 +2199,7 @@ nat44_in2out_reass_node_fn (vlib_main_t * vm, goto trace0; next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0, - &s0, node, next0, thread_index); + &s0, node, next0, thread_index, now); if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP)) goto trace0; @@ -2374,6 +2417,110 @@ icmp_get_ed_key(ip4_header_t *ip0, nat_ed_ses_key_t *p_key0) return 0; } +int +nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void * arg) +{ + snat_main_t *sm = &snat_main; + nat44_is_idle_session_ctx_t *ctx = arg; + snat_session_t *s; + u64 sess_timeout_time; + nat_ed_ses_key_t ed_key; + clib_bihash_kv_16_8_t ed_kv; + int i; + snat_address_t *a; + snat_session_key_t key; + snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data, + ctx->thread_index); + + s = pool_elt_at_index (tsm->sessions, kv->value); + sess_timeout_time = s->last_heard + (f64)nat44_session_get_timeout(sm, s); + if (ctx->now >= sess_timeout_time) + { + if (is_fwd_bypass_session (s)) + goto delete; + + ed_key.l_addr = s->out2in.addr; + ed_key.r_addr = s->ext_host_addr; + ed_key.fib_index = s->out2in.fib_index; + if (snat_is_unk_proto_session (s)) + { + ed_key.proto = s->in2out.port; + ed_key.r_port = 0; + ed_key.l_port = 0; + } + else + { + ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol); + ed_key.l_port = s->out2in.port; + ed_key.r_port = s->ext_host_port; + } + ed_kv.key[0] = ed_key.as_u64[0]; + ed_kv.key[1] = ed_key.as_u64[1]; + if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &ed_kv, 0)) + nat_log_warn ("out2in_ed key del failed"); + + if (snat_is_unk_proto_session (s)) + goto delete; + + snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32, + s->out2in.addr.as_u32, + s->in2out.protocol, + s->in2out.port, + s->out2in.port, + s->in2out.fib_index); + + if (is_twice_nat_session (s)) + { + for (i = 0; i < vec_len (sm->twice_nat_addresses); i++) + { + key.protocol = s->in2out.protocol; + key.port = s->ext_host_nat_port; + a = sm->twice_nat_addresses + i; + if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32) + { + snat_free_outside_address_and_port (sm->twice_nat_addresses, + ctx->thread_index, &key); + break; + } + } + } + + if (snat_is_session_static (s)) + goto delete; + + if (s->outside_address_index != ~0) + snat_free_outside_address_and_port (sm->addresses, ctx->thread_index, + &s->out2in); + delete: + nat44_delete_session (sm, s, ctx->thread_index); + return 1; + } + + return 0; +} + +static inline u32 +icmp_in2out_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0, + ip4_header_t * ip0, icmp46_header_t * icmp0, + u32 sw_if_index0, u32 rx_fib_index0, + vlib_node_runtime_t * node, u32 next0, f64 now, + u32 thread_index, snat_session_t ** p_s0) +{ + next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, + next0, thread_index, p_s0, 0); + snat_session_t * s0 = *p_s0; + if (PREDICT_TRUE(next0 != SNAT_IN2OUT_NEXT_DROP && s0)) + { + /* Hairpinning */ + if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0) + snat_icmp_hairpinning(sm, b0, ip0, icmp0, sm->endpoint_dependent); + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (sm->vlib_main, b0)); + } + return next0; +} + static u32 slow_path_ed (snat_main_t *sm, vlib_buffer_t *b, @@ -2382,7 +2529,8 @@ slow_path_ed (snat_main_t *sm, snat_session_t ** sessionp, vlib_node_runtime_t * node, u32 next, - u32 thread_index) + u32 thread_index, + f64 now) { snat_session_t *s; snat_user_t *u; @@ -2401,6 +2549,7 @@ slow_path_ed (snat_main_t *sm, .ip4.as_u32 = key->r_addr.as_u32, }, }; + nat44_is_idle_session_ctx_t ctx; if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index))) { @@ -2437,14 +2586,20 @@ slow_path_ed (snat_main_t *sm, if (!u) { nat_log_warn ("create NAT user failed"); + if (!is_sm) + snat_free_outside_address_and_port (sm->addresses, + thread_index, &key1); return SNAT_IN2OUT_NEXT_DROP; } - s = nat_session_alloc_or_recycle (sm, u, thread_index); + s = nat_ed_session_alloc (sm, u, thread_index); if (!s) { nat44_delete_user_with_no_session (sm, u, thread_index); nat_log_warn ("create NAT session failed"); + if (!is_sm) + snat_free_outside_address_and_port (sm->addresses, + thread_index, &key1); return SNAT_IN2OUT_NEXT_DROP; } @@ -2487,13 +2642,19 @@ slow_path_ed (snat_main_t *sm, /* Add to lookup tables */ kv->value = s - tsm->sessions; - if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, kv, 1)) + ctx.now = now; + ctx.thread_index = thread_index; + if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, kv, + nat44_i2o_ed_is_idle_session_cb, + &ctx)) nat_log_notice ("in2out-ed key add failed"); make_ed_kv (kv, &key1.addr, &key->r_addr, key->proto, s->out2in.fib_index, key1.port, key->r_port); kv->value = s - tsm->sessions; - if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, kv, 1)) + if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->out2in_ed, kv, + nat44_o2i_ed_is_idle_session_cb, + &ctx)) nat_log_notice ("out2in-ed key add failed"); *sessionp = s; @@ -2588,8 +2749,6 @@ nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip, if (nat44_set_tcp_session_state_i2o (sm, s, tcp, thread_index)) return 1; } - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s, thread_index); /* Accounting */ nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b)); @@ -2703,7 +2862,7 @@ 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); + thread_index, vlib_time_now (sm->vlib_main)); if (PREDICT_FALSE (next == SNAT_IN2OUT_NEXT_DROP)) goto out; @@ -2923,7 +3082,7 @@ nat44_ed_in2out_unknown_proto (snat_main_t *sm, } create_ses: - s = nat_session_alloc_or_recycle (sm, u, thread_index); + s = nat_ed_session_alloc (sm, u, thread_index); if (!s) { nat44_delete_user_with_no_session (sm, u, thread_index); @@ -2965,8 +3124,6 @@ create_ses: /* Accounting */ nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b)); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s, thread_index); /* Hairpinning */ if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0) @@ -3088,7 +3245,7 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) { - next0 = icmp_in2out_slow_path + next0 = icmp_in2out_ed_slow_path (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, next0, now, thread_index, &s0); goto trace00; @@ -3140,7 +3297,7 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, } next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node, - next0, thread_index); + next0, thread_index, now); if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP)) goto trace00; @@ -3211,8 +3368,6 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, /* Accounting */ nat44_session_update_counters (s0, now, vlib_buffer_length_in_chain (vm, b0)); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s0, thread_index); trace00: if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) @@ -3273,7 +3428,7 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP)) { - next1 = icmp_in2out_slow_path + next1 = icmp_in2out_ed_slow_path (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node, next1, now, thread_index, &s1); goto trace01; @@ -3325,7 +3480,7 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, } next1 = slow_path_ed (sm, b1, rx_fib_index1, &kv1, &s1, node, - next1, thread_index); + next1, thread_index, now); if (PREDICT_FALSE (next1 == SNAT_IN2OUT_NEXT_DROP)) goto trace01; @@ -3396,8 +3551,6 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, /* Accounting */ nat44_session_update_counters (s1, now, vlib_buffer_length_in_chain (vm, b1)); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s1, thread_index); trace01: if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) @@ -3487,7 +3640,7 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) { - next0 = icmp_in2out_slow_path + next0 = icmp_in2out_ed_slow_path (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, next0, now, thread_index, &s0); goto trace0; @@ -3539,7 +3692,7 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, } next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node, - next0, thread_index); + next0, thread_index, now); if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP)) goto trace0; @@ -3610,8 +3763,6 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, /* Accounting */ nat44_session_update_counters (s0, now, vlib_buffer_length_in_chain (vm, b0)); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s0, thread_index); trace0: if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) |