diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/plugins/nat/in2out_ed.c | 683 | ||||
| -rw-r--r-- | src/plugins/nat/out2in_ed.c | 736 |
2 files changed, 339 insertions, 1080 deletions
diff --git a/src/plugins/nat/in2out_ed.c b/src/plugins/nat/in2out_ed.c index e52411094c2..581d7b4ef60 100644 --- a/src/plugins/nat/in2out_ed.c +++ b/src/plugins/nat/in2out_ed.c @@ -818,10 +818,10 @@ nat44_ed_in2out_unknown_proto (snat_main_t * sm, } static inline uword -nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame, int is_slow_path, - int is_output_feature) +nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, + int is_output_feature) { u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index; nat_next_t next_index; @@ -835,8 +835,7 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, def_slow = is_output_feature ? NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH : NAT_NEXT_IN2OUT_ED_SLOW_PATH; - stats_node_index = is_slow_path ? sm->ed_in2out_slowpath_node_index : - sm->ed_in2out_node_index; + stats_node_index = sm->ed_in2out_node_index; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; @@ -848,64 +847,37 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - while (n_left_from >= 4 && n_left_to_next >= 2) + while (n_left_from > 0 && n_left_to_next > 0) { - u32 bi0, bi1; - vlib_buffer_t *b0, *b1; + u32 bi0; + vlib_buffer_t *b0; u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0, new_addr0, old_addr0; - u32 next1, sw_if_index1, rx_fib_index1, iph_offset1 = 0, proto1, - new_addr1, old_addr1; - u16 old_port0, new_port0, old_port1, new_port1; - ip4_header_t *ip0, *ip1; - udp_header_t *udp0, *udp1; - tcp_header_t *tcp0, *tcp1; - icmp46_header_t *icmp0, *icmp1; - snat_session_t *s0 = 0, *s1 = 0; - clib_bihash_kv_16_8_t kv0, value0, kv1, value1; - ip_csum_t sum0, sum1; - - /* Prefetch next iteration. */ - { - vlib_buffer_t *p2, *p3; - - p2 = vlib_get_buffer (vm, from[2]); - p3 = vlib_get_buffer (vm, from[3]); - - vlib_prefetch_buffer_header (p2, LOAD); - vlib_prefetch_buffer_header (p3, LOAD); - - CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE); - CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE); - } - - /* speculatively enqueue b0 and b1 to the current next frame */ - to_next[0] = bi0 = from[0]; - to_next[1] = bi1 = from[1]; - from += 2; - to_next += 2; - n_left_from -= 2; - n_left_to_next -= 2; + u16 old_port0, new_port0; + ip4_header_t *ip0; + udp_header_t *udp0; + tcp_header_t *tcp0; + snat_session_t *s0 = 0; + clib_bihash_kv_16_8_t kv0, value0; + ip_csum_t sum0; + + /* speculatively enqueue b0 to the current next frame */ + bi0 = from[0]; + to_next[0] = bi0; + from += 1; + to_next += 1; + n_left_from -= 1; + n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); - b1 = vlib_get_buffer (vm, bi1); if (is_output_feature) { - // output feature fast path is enabled on the arc - // we need new arc_next feature - if (PREDICT_TRUE (!is_slow_path)) - { - vnet_feature_next (&nat_buffer_opaque (b0)->arc_next, b0); - vnet_feature_next (&nat_buffer_opaque (b1)->arc_next, b1); - } - + vnet_feature_next (&nat_buffer_opaque (b0)->arc_next, b0); iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length; - iph_offset1 = vnet_buffer (b1)->ip.reass.save_rewrite_length; } next0 = nat_buffer_opaque (b0)->arc_next; - next1 = nat_buffer_opaque (b1)->arc_next; ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + iph_offset0); @@ -922,58 +894,30 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, ICMP4_time_exceeded_ttl_exceeded_in_transit, 0); next0 = NAT_NEXT_ICMP_ERROR; - goto trace00; + goto trace0; } udp0 = ip4_next_header (ip0); tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; proto0 = ip_proto_to_snat_proto (ip0->protocol); - if (is_slow_path) + if (PREDICT_FALSE (proto0 == ~0)) { - if (PREDICT_FALSE (proto0 == ~0)) - { - s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0, - rx_fib_index0, - thread_index, now, vm, - node); - if (!s0) - next0 = NAT_NEXT_DROP; - other_packets++; - goto trace00; - } - - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = icmp_in2out_ed_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, thread_index, &s0); - icmp_packets++; - goto trace00; - } + next0 = def_slow; + goto trace0; } - else - { - if (PREDICT_FALSE (proto0 == ~0)) - { - next0 = def_slow; - goto trace00; - } - if (is_output_feature) - { - if (PREDICT_FALSE - (nat_not_translate_output_feature_fwd - (sm, ip0, thread_index, now, vm, b0))) - goto trace00; - } + if (is_output_feature) + { + if (PREDICT_FALSE (nat_not_translate_output_feature_fwd + (sm, ip0, thread_index, now, vm, b0))) + goto trace0; + } - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = def_slow; - goto trace00; - } + if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + { + next0 = def_slow; + goto trace0; } make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address, @@ -981,64 +925,16 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, vnet_buffer (b0)->ip.reass.l4_src_port, vnet_buffer (b0)->ip.reass.l4_dst_port); + // lookup for session if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0)) { - if (is_slow_path) - { - if (is_output_feature) - { - if (PREDICT_FALSE - (nat44_ed_not_translate_output_feature - (sm, ip0, ip0->protocol, - vnet_buffer (b0)->ip.reass.l4_src_port, - vnet_buffer (b0)->ip.reass.l4_dst_port, - thread_index, sw_if_index0, - vnet_buffer (b0)->sw_if_index[VLIB_TX]))) - goto trace00; - - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ - if (PREDICT_FALSE - (proto0 == SNAT_PROTOCOL_UDP - && (vnet_buffer (b0)->ip.reass.l4_dst_port == - clib_host_to_net_u16 - (UDP_DST_PORT_dhcp_to_server)) - && ip0->dst_address.as_u32 == 0xffffffff)) - goto trace00; - } - else - { - if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, - sw_if_index0, - ip0, proto0, - rx_fib_index0, - thread_index))) - goto trace00; - } - - next0 = - slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node, - next0, thread_index, now); - - if (PREDICT_FALSE (next0 == NAT_NEXT_DROP)) - goto trace00; - - if (PREDICT_FALSE (!s0)) - goto trace00; - } - else - { - next0 = def_slow; - goto trace00; - } - } - else - { - s0 = pool_elt_at_index (tsm->sessions, value0.value); + // session does not exist go slow path + next0 = def_slow; + goto trace0; } + s0 = pool_elt_at_index (tsm->sessions, value0.value); + b0->flags |= VNET_BUFFER_F_IS_NATED; if (!is_output_feature) @@ -1064,16 +960,17 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, new_port0 = udp0->src_port = s0->out2in.port; sum0 = tcp0->checksum; sum0 = - ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); + ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, dst_address); sum0 = - ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, - length); + ip_csum_update (sum0, old_port0, new_port0, + ip4_header_t, length); if (PREDICT_FALSE (is_twice_nat_session (s0))) { - sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, - s0->ext_host_addr.as_u32, - ip4_header_t, dst_address); + sum0 = + ip_csum_update (sum0, ip0->dst_address.as_u32, + s0->ext_host_addr.as_u32, + ip4_header_t, dst_address); sum0 = ip_csum_update (sum0, vnet_buffer (b0)->ip. @@ -1087,17 +984,19 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, } tcp_packets++; if (nat44_set_tcp_session_state_i2o (sm, s0, b0, thread_index)) - goto trace00; + goto trace0; } else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment && udp0->checksum) { new_port0 = udp0->src_port = s0->out2in.port; sum0 = udp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, - length); + sum0 = + ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + dst_address); + sum0 = + ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, + length); if (PREDICT_FALSE (is_twice_nat_session (s0))) { sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, @@ -1129,283 +1028,78 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, /* Accounting */ nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain (vm, - b0), - thread_index); + vlib_buffer_length_in_chain + (vm, b0), thread_index); /* Per-user LRU list maintenance */ nat44_session_update_lru (sm, s0, thread_index); - trace00: + trace0: if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED))) { nat_in2out_ed_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); - t->is_slow_path = is_slow_path; t->sw_if_index = sw_if_index0; t->next_index = next0; - t->session_index = ~0; + t->is_slow_path = 0; + if (s0) t->session_index = s0 - tsm->sessions; - } - - pkts_processed += next0 == nat_buffer_opaque (b0)->arc_next; - - ip1 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b1) + - iph_offset1); - - sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; - rx_fib_index1 = - fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, - sw_if_index1); - - if (PREDICT_FALSE (ip1->ttl == 1)) - { - vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next1 = NAT_NEXT_ICMP_ERROR; - goto trace01; - } - - udp1 = ip4_next_header (ip1); - tcp1 = (tcp_header_t *) udp1; - icmp1 = (icmp46_header_t *) udp1; - proto1 = ip_proto_to_snat_proto (ip1->protocol); - - if (is_slow_path) - { - if (PREDICT_FALSE (proto1 == ~0)) - { - s1 = nat44_ed_in2out_unknown_proto (sm, b1, ip1, - rx_fib_index1, - thread_index, now, - vm, node); - if (!s1) - next1 = NAT_NEXT_DROP; - other_packets++; - goto trace01; - } - - if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP)) - { - next1 = icmp_in2out_ed_slow_path - (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, - node, next1, now, thread_index, &s1); - icmp_packets++; - goto trace01; - } - } - else - { - if (PREDICT_FALSE (proto1 == ~0)) - { - next1 = def_slow; - goto trace01; - } - - if (is_output_feature) - { - if (PREDICT_FALSE - (nat_not_translate_output_feature_fwd - (sm, ip1, thread_index, now, vm, b1))) - goto trace01; - } - - if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP)) - { - next1 = def_slow; - goto trace01; - } - } - - make_ed_kv (&kv1, &ip1->src_address, &ip1->dst_address, - ip1->protocol, rx_fib_index1, - vnet_buffer (b1)->ip.reass.l4_src_port, - vnet_buffer (b1)->ip.reass.l4_dst_port); - - if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv1, &value1)) - { - if (is_slow_path) - { - if (is_output_feature) - { - if (PREDICT_FALSE - (nat44_ed_not_translate_output_feature - (sm, ip1, ip1->protocol, - vnet_buffer (b1)->ip.reass.l4_src_port, - vnet_buffer (b1)->ip.reass.l4_dst_port, - thread_index, sw_if_index1, - vnet_buffer (b1)->sw_if_index[VLIB_TX]))) - goto trace01; - - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ - if (PREDICT_FALSE - (proto1 == SNAT_PROTOCOL_UDP - && (vnet_buffer (b1)->ip.reass.l4_dst_port == - clib_host_to_net_u16 - (UDP_DST_PORT_dhcp_to_server)) - && ip1->dst_address.as_u32 == 0xffffffff)) - goto trace01; - } - else - { - if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, - sw_if_index1, - ip1, - proto1, - rx_fib_index1, - thread_index))) - goto trace01; - } - - next1 = - slow_path_ed (sm, b1, rx_fib_index1, &kv1, &s1, node, - next1, thread_index, now); - - if (PREDICT_FALSE (next1 == NAT_NEXT_DROP)) - goto trace01; - - if (PREDICT_FALSE (!s1)) - goto trace01; - } else - { - next1 = def_slow; - goto trace01; - } + t->session_index = ~0; } - else - { - s1 = pool_elt_at_index (tsm->sessions, value1.value); - } - - b1->flags |= VNET_BUFFER_F_IS_NATED; - - if (!is_output_feature) - vnet_buffer (b1)->sw_if_index[VLIB_TX] = s1->out2in.fib_index; - - old_addr1 = ip1->src_address.as_u32; - new_addr1 = ip1->src_address.as_u32 = s1->out2in.addr.as_u32; - sum1 = ip1->checksum; - sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t, - src_address); - if (PREDICT_FALSE (is_twice_nat_session (s1))) - sum1 = ip_csum_update (sum1, ip1->dst_address.as_u32, - s1->ext_host_addr.as_u32, ip4_header_t, - dst_address); - ip1->checksum = ip_csum_fold (sum1); - old_port1 = vnet_buffer (b1)->ip.reass.l4_src_port; + pkts_processed += next0 == nat_buffer_opaque (b0)->arc_next; + /* verify speculative enqueue, maybe switch current next frame */ + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, + to_next, n_left_to_next, + bi0, next0); + } - if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP)) - { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) - { - new_port1 = udp1->src_port = s1->out2in.port; - sum1 = tcp1->checksum; - sum1 = - ip_csum_update (sum1, old_addr1, new_addr1, - ip4_header_t, dst_address); - sum1 = - ip_csum_update (sum1, old_port1, new_port1, - ip4_header_t, length); - if (PREDICT_FALSE (is_twice_nat_session (s1))) - { - sum1 = - ip_csum_update (sum1, ip1->dst_address.as_u32, - s1->ext_host_addr.as_u32, - ip4_header_t, dst_address); - sum1 = - ip_csum_update (sum1, - vnet_buffer (b1)->ip. - reass.l4_dst_port, s1->ext_host_port, - ip4_header_t, length); - tcp1->dst_port = s1->ext_host_port; - ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32; - } - tcp1->checksum = ip_csum_fold (sum1); - mss_clamping (sm, tcp1, &sum1); - } - tcp_packets++; - if (nat44_set_tcp_session_state_i2o (sm, s1, b1, thread_index)) - goto trace01; - } - else if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment - && udp1->checksum) - { - new_port1 = udp1->src_port = s1->out2in.port; - sum1 = udp1->checksum; - sum1 = - ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t, - dst_address); - sum1 = - ip_csum_update (sum1, old_port1, new_port1, ip4_header_t, - length); + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } - if (PREDICT_FALSE (is_twice_nat_session (s1))) - { - sum1 = ip_csum_update (sum1, ip1->dst_address.as_u32, - s1->ext_host_addr.as_u32, - ip4_header_t, dst_address); - sum1 = - ip_csum_update (sum1, - vnet_buffer (b1)->ip.reass.l4_dst_port, - s1->ext_host_port, ip4_header_t, length); - udp1->dst_port = s1->ext_host_port; - ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32; - } - udp1->checksum = ip_csum_fold (sum1); - udp_packets++; - } - else - { - if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment) - { - new_port1 = udp1->src_port = s1->out2in.port; - if (PREDICT_FALSE (is_twice_nat_session (s1))) - { - udp1->dst_port = s1->ext_host_port; - ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32; - } - } - udp_packets++; - } + vlib_node_increment_counter (vm, stats_node_index, + NAT_IN2OUT_ED_ERROR_IN2OUT_PACKETS, + pkts_processed); + vlib_node_increment_counter (vm, stats_node_index, + NAT_IN2OUT_ED_ERROR_TCP_PACKETS, tcp_packets); + vlib_node_increment_counter (vm, stats_node_index, + NAT_IN2OUT_ED_ERROR_UDP_PACKETS, udp_packets); + vlib_node_increment_counter (vm, stats_node_index, + NAT_IN2OUT_ED_ERROR_ICMP_PACKETS, + icmp_packets); + vlib_node_increment_counter (vm, stats_node_index, + NAT_IN2OUT_ED_ERROR_OTHER_PACKETS, + other_packets); + return frame->n_vectors; +} - /* Accounting */ - nat44_session_update_counters (s1, now, - vlib_buffer_length_in_chain (vm, - b1), - thread_index); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s1, thread_index); +static inline uword +nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, + int is_output_feature) +{ + u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index; + nat_next_t next_index; + snat_main_t *sm = &snat_main; + f64 now = vlib_time_now (vm); + u32 thread_index = vm->thread_index; + snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; + u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets = 0; - trace01: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b1->flags & VLIB_BUFFER_IS_TRACED))) - { - nat_in2out_ed_trace_t *t = - vlib_add_trace (vm, node, b1, sizeof (*t)); - t->is_slow_path = is_slow_path; - t->sw_if_index = sw_if_index1; - t->next_index = next1; - t->session_index = ~0; - if (s1) - t->session_index = s1 - tsm->sessions; - } + stats_node_index = sm->ed_in2out_slowpath_node_index; - pkts_processed += next1 == nat_buffer_opaque (b1)->arc_next; + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; + while (n_left_from > 0) + { + u32 n_left_to_next; - /* verify speculative enqueues, maybe switch current next frame */ - vlib_validate_buffer_enqueue_x2 (vm, node, next_index, - to_next, n_left_to_next, - bi0, bi1, next0, next1); - } + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from > 0 && n_left_to_next > 0) { @@ -1433,14 +1127,7 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, b0 = vlib_get_buffer (vm, bi0); if (is_output_feature) - { - // output feature fast path is enabled on the arc - // we need new arc_next feature - if (PREDICT_TRUE (!is_slow_path)) - vnet_feature_next (&nat_buffer_opaque (b0)->arc_next, b0); - - iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length; - } + iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length; next0 = nat_buffer_opaque (b0)->arc_next; @@ -1467,52 +1154,29 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, icmp0 = (icmp46_header_t *) udp0; proto0 = ip_proto_to_snat_proto (ip0->protocol); - if (is_slow_path) + if (PREDICT_FALSE (proto0 == ~0)) { - if (PREDICT_FALSE (proto0 == ~0)) - { - s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0, - rx_fib_index0, - thread_index, now, - vm, node); - if (!s0) - next0 = NAT_NEXT_DROP; - other_packets++; - goto trace0; - } - - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = icmp_in2out_ed_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, - node, next0, now, thread_index, &s0); - icmp_packets++; - goto trace0; - } + s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0, + rx_fib_index0, + thread_index, now, + vm, node); + if (!s0) + next0 = NAT_NEXT_DROP; + + other_packets++; + goto trace0; } - else - { - if (PREDICT_FALSE (proto0 == ~0)) - { - next0 = def_slow; - goto trace0; - } - - if (is_output_feature) - { - if (PREDICT_FALSE - (nat_not_translate_output_feature_fwd - (sm, ip0, thread_index, now, vm, b0))) - goto trace0; - } - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = def_slow; - goto trace0; - } + if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + { + next0 = icmp_in2out_ed_slow_path + (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, + node, next0, now, thread_index, &s0); + icmp_packets++; + goto trace0; } + // move down make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address, ip0->protocol, rx_fib_index0, vnet_buffer (b0)->ip.reass.l4_src_port, @@ -1520,63 +1184,54 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0)) { - if (is_slow_path) - { - if (is_output_feature) - { - if (PREDICT_FALSE - (nat44_ed_not_translate_output_feature - (sm, ip0, ip0->protocol, - vnet_buffer (b0)->ip.reass.l4_src_port, - vnet_buffer (b0)->ip.reass.l4_dst_port, - thread_index, sw_if_index0, - vnet_buffer (b0)->sw_if_index[VLIB_TX]))) - goto trace0; - - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ - if (PREDICT_FALSE - (proto0 == SNAT_PROTOCOL_UDP - && (vnet_buffer (b0)->ip.reass.l4_dst_port == - clib_host_to_net_u16 - (UDP_DST_PORT_dhcp_to_server)) - && ip0->dst_address.as_u32 == 0xffffffff)) - goto trace0; - } - else - { - if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, - sw_if_index0, - ip0, - proto0, - rx_fib_index0, - thread_index))) - goto trace0; - } - next0 = - slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node, - next0, thread_index, now); - - if (PREDICT_FALSE (next0 == NAT_NEXT_DROP)) + if (is_output_feature) + { + if (PREDICT_FALSE + (nat44_ed_not_translate_output_feature + (sm, ip0, ip0->protocol, + vnet_buffer (b0)->ip.reass.l4_src_port, + vnet_buffer (b0)->ip.reass.l4_dst_port, + thread_index, sw_if_index0, + vnet_buffer (b0)->sw_if_index[VLIB_TX]))) goto trace0; - if (PREDICT_FALSE (!s0)) + /* + * Send DHCP packets to the ipv4 stack, or we won't + * be able to use dhcp client on the outside interface + */ + if (PREDICT_FALSE + (proto0 == SNAT_PROTOCOL_UDP + && (vnet_buffer (b0)->ip.reass.l4_dst_port == + clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_server)) + && ip0->dst_address.as_u32 == 0xffffffff)) goto trace0; } else { - next0 = def_slow; - goto trace0; + if (PREDICT_FALSE + (nat44_ed_not_translate + (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0, + thread_index))) + goto trace0; } + + next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node, + next0, thread_index, now); + + if (PREDICT_FALSE (next0 == NAT_NEXT_DROP)) + goto trace0; + + if (PREDICT_FALSE (!s0)) + goto trace0; + } else { s0 = pool_elt_at_index (tsm->sessions, value0.value); } + b0->flags |= VNET_BUFFER_F_IS_NATED; if (!is_output_feature) @@ -1681,12 +1336,14 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, { nat_in2out_ed_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); - t->is_slow_path = is_slow_path; t->sw_if_index = sw_if_index0; t->next_index = next0; - t->session_index = ~0; + t->is_slow_path = 1; + if (s0) t->session_index = s0 - tsm->sessions; + else + t->session_index = ~0; } pkts_processed += next0 == nat_buffer_opaque (b0)->arc_next; @@ -1720,7 +1377,7 @@ VLIB_NODE_FN (nat44_ed_in2out_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { - return nat44_ed_in2out_node_fn_inline (vm, node, frame, 0, 0); + return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 0); } /* *INDENT-OFF* */ @@ -1740,7 +1397,7 @@ VLIB_NODE_FN (nat44_ed_in2out_output_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { - return nat44_ed_in2out_node_fn_inline (vm, node, frame, 0, 1); + return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 1); } /* *INDENT-OFF* */ @@ -1760,7 +1417,7 @@ VLIB_NODE_FN (nat44_ed_in2out_slowpath_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { - return nat44_ed_in2out_node_fn_inline (vm, node, frame, 1, 0); + return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 0); } /* *INDENT-OFF* */ @@ -1781,7 +1438,7 @@ VLIB_NODE_FN (nat44_ed_in2out_output_slowpath_node) (vlib_main_t * vm, * node, vlib_frame_t * frame) { - return nat44_ed_in2out_node_fn_inline (vm, node, frame, 1, 1); + return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 1); } /* *INDENT-OFF* */ diff --git a/src/plugins/nat/out2in_ed.c b/src/plugins/nat/out2in_ed.c index 7cb205f6d6f..91b8d5a8aae 100644 --- a/src/plugins/nat/out2in_ed.c +++ b/src/plugins/nat/out2in_ed.c @@ -668,9 +668,9 @@ nat44_ed_out2in_unknown_proto (snat_main_t * sm, } static inline uword -nat44_ed_out2in_node_fn_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame, int is_slow_path) +nat44_ed_out2in_fast_path_node_fn_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) { u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index; nat_next_t next_index; @@ -681,8 +681,7 @@ nat44_ed_out2in_node_fn_inline (vlib_main_t * vm, u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets = 0, fragments = 0; - stats_node_index = is_slow_path ? sm->ed_out2in_slowpath_node_index : - sm->ed_out2in_node_index; + stats_node_index = sm->ed_out2in_node_index; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; @@ -694,54 +693,30 @@ nat44_ed_out2in_node_fn_inline (vlib_main_t * vm, vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - while (n_left_from >= 4 && n_left_to_next >= 2) + while (n_left_from > 0 && n_left_to_next > 0) { - u32 bi0, bi1; - vlib_buffer_t *b0, *b1; + u32 bi0; + vlib_buffer_t *b0; u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0, new_addr0; - u32 next1, sw_if_index1, rx_fib_index1, proto1, old_addr1, - new_addr1; - u16 old_port0, new_port0, old_port1, new_port1; - ip4_header_t *ip0, *ip1; - udp_header_t *udp0, *udp1; - tcp_header_t *tcp0, *tcp1; - icmp46_header_t *icmp0, *icmp1; - snat_session_t *s0 = 0, *s1 = 0; - clib_bihash_kv_16_8_t kv0, value0, kv1, value1; - ip_csum_t sum0, sum1; - snat_session_key_t e_key0, l_key0, e_key1, l_key1; - lb_nat_type_t lb_nat0, lb_nat1; - twice_nat_type_t twice_nat0, twice_nat1; - u8 identity_nat0, identity_nat1; - - /* Prefetch next iteration. */ - { - vlib_buffer_t *p2, *p3; - - p2 = vlib_get_buffer (vm, from[2]); - p3 = vlib_get_buffer (vm, from[3]); - - vlib_prefetch_buffer_header (p2, LOAD); - vlib_prefetch_buffer_header (p3, LOAD); - - CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE); - CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE); - } - - /* speculatively enqueue b0 and b1 to the current next frame */ - to_next[0] = bi0 = from[0]; - to_next[1] = bi1 = from[1]; - from += 2; - to_next += 2; - n_left_from -= 2; - n_left_to_next -= 2; + u16 old_port0, new_port0; + ip4_header_t *ip0; + udp_header_t *udp0; + tcp_header_t *tcp0; + snat_session_t *s0 = 0; + clib_bihash_kv_16_8_t kv0, value0; + ip_csum_t sum0; - b0 = vlib_get_buffer (vm, bi0); - b1 = vlib_get_buffer (vm, bi1); + /* speculatively enqueue b0 to the current next frame */ + bi0 = from[0]; + to_next[0] = bi0; + from += 1; + to_next += 1; + n_left_from -= 1; + n_left_to_next -= 1; + b0 = vlib_get_buffer (vm, bi0); next0 = nat_buffer_opaque (b0)->arc_next; - next1 = nat_buffer_opaque (b1)->arc_next; vnet_buffer (b0)->snat.flags = 0; ip0 = vlib_buffer_get_current (b0); @@ -758,53 +733,23 @@ nat44_ed_out2in_node_fn_inline (vlib_main_t * vm, ICMP4_time_exceeded_ttl_exceeded_in_transit, 0); next0 = NAT_NEXT_ICMP_ERROR; - goto trace00; + goto trace0; } udp0 = ip4_next_header (ip0); tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; proto0 = ip_proto_to_snat_proto (ip0->protocol); - if (is_slow_path) + if (PREDICT_FALSE (proto0 == ~0)) { - if (PREDICT_FALSE (proto0 == ~0)) - { - s0 = - nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0, - thread_index, now, vm, - node); - other_packets++; - if (!sm->forwarding_enabled) - { - if (!s0) - next0 = NAT_NEXT_DROP; - goto trace00; - } - } - - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = icmp_out2in_ed_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, thread_index, &s0); - icmp_packets++; - goto trace00; - } + next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + goto trace0; } - else - { - if (PREDICT_FALSE (proto0 == ~0)) - { - next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; - goto trace00; - } - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; - goto trace00; - } + if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + { + next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + goto trace0; } make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address, @@ -814,94 +759,10 @@ nat44_ed_out2in_node_fn_inline (vlib_main_t * vm, if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0)) { - if (is_slow_path) - { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - e_key0.addr = ip0->dst_address; - e_key0.port = vnet_buffer (b0)->ip.reass.l4_dst_port; - e_key0.protocol = proto0; - e_key0.fib_index = rx_fib_index0; - if (snat_static_mapping_match (sm, e_key0, &l_key0, 1, 0, - &twice_nat0, &lb_nat0, - &ip0->src_address, - &identity_nat0)) - { - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ - if (PREDICT_FALSE - (proto0 == SNAT_PROTOCOL_UDP - && (vnet_buffer (b0)->ip.reass.l4_dst_port == - clib_host_to_net_u16 - (UDP_DST_PORT_dhcp_to_client)))) - { - goto trace00; - } - - if (!sm->forwarding_enabled) - { - b0->error = - node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; - next0 = NAT_NEXT_DROP; - } - else - { - if (next_src_nat - (sm, ip0, ip0->protocol, - vnet_buffer (b0)->ip.reass.l4_src_port, - vnet_buffer (b0)->ip.reass.l4_dst_port, - thread_index, rx_fib_index0)) - { - next0 = NAT_NEXT_IN2OUT_ED_FAST_PATH; - goto trace00; - } - if (sm->num_workers > 1) - create_bypass_for_fwd_worker (sm, b0, ip0, - rx_fib_index0); - else - create_bypass_for_fwd (sm, b0, ip0, rx_fib_index0, - thread_index); - } - goto trace00; - } - - if (PREDICT_FALSE (identity_nat0)) - goto trace00; - - if ((proto0 == SNAT_PROTOCOL_TCP) - && !tcp_flags_is_init (vnet_buffer (b0)->ip. - reass.icmp_type_or_tcp_flags)) - { - b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN]; - next0 = NAT_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, - thread_index, - twice_nat0, - lb_nat0, now); - - if (!s0) - { - next0 = NAT_NEXT_DROP; - goto trace00; - } - } - else - { - next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; - goto trace00; - } - } - else - { - s0 = pool_elt_at_index (tsm->sessions, value0.value); + next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + goto trace0; } + s0 = pool_elt_at_index (tsm->sessions, value0.value); old_addr0 = ip0->dst_address.as_u32; new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32; @@ -951,7 +812,7 @@ nat44_ed_out2in_node_fn_inline (vlib_main_t * vm, (sm, s0, vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags, vnet_buffer (b0)->ip.reass.tcp_ack_number, vnet_buffer (b0)->ip.reass.tcp_seq_number, thread_index)) - goto trace00; + goto trace0; } else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment && udp0->checksum) @@ -985,14 +846,8 @@ nat44_ed_out2in_node_fn_inline (vlib_main_t * vm, new_port0 = udp0->dst_port = s0->in2out.port; if (PREDICT_FALSE (is_twice_nat_session (s0))) { - udp0->dst_port = s0->in2out.port; - if (is_twice_nat_session (s0)) - { - udp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = - s0->ext_host_nat_addr.as_u32; - } - udp0->checksum = 0; + udp0->src_port = s0->ext_host_nat_port; + ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; } } udp_packets++; @@ -1005,305 +860,75 @@ nat44_ed_out2in_node_fn_inline (vlib_main_t * vm, /* Per-user LRU list maintenance */ nat44_session_update_lru (sm, s0, thread_index); - trace00: + trace0: if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED))) { nat44_ed_out2in_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); - t->is_slow_path = is_slow_path; t->sw_if_index = sw_if_index0; t->next_index = next0; - t->session_index = ~0; + t->is_slow_path = 0; + if (s0) t->session_index = s0 - tsm->sessions; - } - - pkts_processed += next0 == nat_buffer_opaque (b0)->arc_next; - - vnet_buffer (b1)->snat.flags = 0; - ip1 = vlib_buffer_get_current (b1); - - sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; - rx_fib_index1 = - fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, - sw_if_index1); - - if (PREDICT_FALSE (ip1->ttl == 1)) - { - vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next1 = NAT_NEXT_ICMP_ERROR; - goto trace01; - } - - udp1 = ip4_next_header (ip1); - tcp1 = (tcp_header_t *) udp1; - icmp1 = (icmp46_header_t *) udp1; - proto1 = ip_proto_to_snat_proto (ip1->protocol); - - if (is_slow_path) - { - if (PREDICT_FALSE (proto1 == ~0)) - { - s1 = - nat44_ed_out2in_unknown_proto (sm, b1, ip1, rx_fib_index1, - thread_index, now, vm, - node); - other_packets++; - if (!sm->forwarding_enabled) - { - if (!s1) - next1 = NAT_NEXT_DROP; - goto trace01; - } - } - - if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP)) - { - next1 = icmp_out2in_ed_slow_path - (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node, - next1, now, thread_index, &s1); - icmp_packets++; - goto trace01; - } - } - else - { - if (PREDICT_FALSE (proto1 == ~0)) - { - next1 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; - goto trace01; - } - - if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP)) - { - next1 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; - goto trace01; - } - } - - make_ed_kv (&kv1, &ip1->dst_address, &ip1->src_address, - ip1->protocol, rx_fib_index1, - vnet_buffer (b1)->ip.reass.l4_dst_port, - vnet_buffer (b1)->ip.reass.l4_src_port); - - if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv1, &value1)) - { - if (is_slow_path) - { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - e_key1.addr = ip1->dst_address; - e_key1.port = vnet_buffer (b1)->ip.reass.l4_dst_port; - e_key1.protocol = proto1; - e_key1.fib_index = rx_fib_index1; - if (snat_static_mapping_match (sm, e_key1, &l_key1, 1, 0, - &twice_nat1, &lb_nat1, - &ip1->src_address, - &identity_nat1)) - { - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ - if (PREDICT_FALSE - (proto1 == SNAT_PROTOCOL_UDP - && (vnet_buffer (b1)->ip.reass.l4_dst_port == - clib_host_to_net_u16 - (UDP_DST_PORT_dhcp_to_client)))) - { - goto trace01; - } - - if (!sm->forwarding_enabled) - { - b1->error = - node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; - next1 = NAT_NEXT_DROP; - } - else - { - if (next_src_nat - (sm, ip1, ip1->protocol, - vnet_buffer (b1)->ip.reass.l4_src_port, - vnet_buffer (b1)->ip.reass.l4_dst_port, - thread_index, rx_fib_index1)) - { - next1 = NAT_NEXT_IN2OUT_ED_FAST_PATH; - goto trace01; - } - if (sm->num_workers > 1) - create_bypass_for_fwd_worker (sm, b1, ip1, - rx_fib_index1); - else - create_bypass_for_fwd (sm, b1, ip1, rx_fib_index1, - thread_index); - } - goto trace01; - } - - if (PREDICT_FALSE (identity_nat1)) - goto trace01; - - if ((proto1 == SNAT_PROTOCOL_TCP) - && !tcp_flags_is_init (vnet_buffer (b1)->ip. - reass.icmp_type_or_tcp_flags)) - { - b1->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN]; - next1 = NAT_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, - thread_index, - twice_nat1, - lb_nat1, now); - - if (!s1) - { - next1 = NAT_NEXT_DROP; - goto trace01; - } - } else - { - next1 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; - goto trace01; - } - } - else - { - s1 = pool_elt_at_index (tsm->sessions, value1.value); + t->session_index = ~0; } - old_addr1 = ip1->dst_address.as_u32; - new_addr1 = ip1->dst_address.as_u32 = s1->in2out.addr.as_u32; - vnet_buffer (b1)->sw_if_index[VLIB_TX] = s1->in2out.fib_index; - - sum1 = ip1->checksum; - sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t, - dst_address); - if (PREDICT_FALSE (is_twice_nat_session (s1))) - sum1 = ip_csum_update (sum1, ip1->src_address.as_u32, - s1->ext_host_nat_addr.as_u32, ip4_header_t, - src_address); - ip1->checksum = ip_csum_fold (sum1); + pkts_processed += next0 == nat_buffer_opaque (b0)->arc_next; + /* verify speculative enqueue, maybe switch current next frame */ + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, + to_next, n_left_to_next, + bi0, next0); + } - old_port1 = vnet_buffer (b1)->ip.reass.l4_dst_port; + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } - if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP)) - { - if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment) - { - new_port1 = udp1->dst_port = s1->in2out.port; + vlib_node_increment_counter (vm, stats_node_index, + NAT_OUT2IN_ED_ERROR_OUT2IN_PACKETS, + pkts_processed); + vlib_node_increment_counter (vm, stats_node_index, + NAT_OUT2IN_ED_ERROR_TCP_PACKETS, tcp_packets); + vlib_node_increment_counter (vm, stats_node_index, + NAT_OUT2IN_ED_ERROR_UDP_PACKETS, udp_packets); + vlib_node_increment_counter (vm, stats_node_index, + NAT_OUT2IN_ED_ERROR_ICMP_PACKETS, + icmp_packets); + vlib_node_increment_counter (vm, stats_node_index, + NAT_OUT2IN_ED_ERROR_OTHER_PACKETS, + other_packets); + vlib_node_increment_counter (vm, stats_node_index, + NAT_OUT2IN_ED_ERROR_FRAGMENTS, fragments); + return frame->n_vectors; +} - sum1 = tcp1->checksum; - sum1 = - ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t, - dst_address); - sum1 = - ip_csum_update (sum1, old_port1, new_port1, ip4_header_t, - length); - if (is_twice_nat_session (s1)) - { - sum1 = ip_csum_update (sum1, ip1->src_address.as_u32, - s1->ext_host_nat_addr.as_u32, - ip4_header_t, dst_address); - sum1 = - ip_csum_update (sum1, - vnet_buffer (b1)->ip. - reass.l4_src_port, - s1->ext_host_nat_port, ip4_header_t, - length); - tcp1->src_port = s1->ext_host_nat_port; - ip1->src_address.as_u32 = s1->ext_host_nat_addr.as_u32; - } - tcp1->checksum = ip_csum_fold (sum1); - } - tcp_packets++; - if (nat44_set_tcp_session_state_o2i - (sm, s1, vnet_buffer (b1)->ip.reass.icmp_type_or_tcp_flags, - vnet_buffer (b1)->ip.reass.tcp_ack_number, - vnet_buffer (b1)->ip.reass.tcp_seq_number, thread_index)) - goto trace01; - } - else if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment - && udp1->checksum) - { - new_port1 = udp1->dst_port = s1->in2out.port; - sum1 = udp1->checksum; - sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t, - dst_address); - sum1 = ip_csum_update (sum1, old_port1, new_port1, ip4_header_t, - length); - if (PREDICT_FALSE (is_twice_nat_session (s1))) - { - sum1 = ip_csum_update (sum1, ip1->src_address.as_u32, - s1->ext_host_nat_addr.as_u32, - ip4_header_t, dst_address); - sum1 = - ip_csum_update (sum1, - vnet_buffer (b1)->ip.reass.l4_src_port, - s1->ext_host_nat_port, ip4_header_t, - length); - udp1->src_port = s1->ext_host_nat_port; - ip1->src_address.as_u32 = s1->ext_host_nat_addr.as_u32; - } - udp1->checksum = ip_csum_fold (sum1); - udp_packets++; - } - else - { - if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment) - { - if (PREDICT_FALSE (is_twice_nat_session (s1))) - { - udp1->dst_port = s1->in2out.port; - if (is_twice_nat_session (s1)) - { - udp1->src_port = s1->ext_host_nat_port; - ip1->src_address.as_u32 = - s1->ext_host_nat_addr.as_u32; - } - udp1->checksum = 0; - } - } - udp_packets++; - } +static inline uword +nat44_ed_out2in_slow_path_node_fn_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index; + nat_next_t next_index; + snat_main_t *sm = &snat_main; + f64 now = vlib_time_now (vm); + u32 thread_index = vm->thread_index; + snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; + u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets = + 0, fragments = 0; - /* Accounting */ - nat44_session_update_counters (s1, now, - vlib_buffer_length_in_chain (vm, b1), - thread_index); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s1, thread_index); + stats_node_index = sm->ed_out2in_slowpath_node_index; - trace01: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b1->flags & VLIB_BUFFER_IS_TRACED))) - { - nat44_ed_out2in_trace_t *t = - vlib_add_trace (vm, node, b1, sizeof (*t)); - t->is_slow_path = is_slow_path; - t->sw_if_index = sw_if_index1; - t->next_index = next1; - t->session_index = ~0; - if (s1) - t->session_index = s1 - tsm->sessions; - } + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; - pkts_processed += next1 == nat_buffer_opaque (b1)->arc_next; + while (n_left_from > 0) + { + u32 n_left_to_next; - /* verify speculative enqueues, maybe switch current next frame */ - vlib_validate_buffer_enqueue_x2 (vm, node, next_index, - to_next, n_left_to_next, - bi0, bi1, next0, next1); - } + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from > 0 && n_left_to_next > 0) { @@ -1358,45 +983,27 @@ nat44_ed_out2in_node_fn_inline (vlib_main_t * vm, icmp0 = (icmp46_header_t *) udp0; proto0 = ip_proto_to_snat_proto (ip0->protocol); - if (is_slow_path) + if (PREDICT_FALSE (proto0 == ~0)) { - if (PREDICT_FALSE (proto0 == ~0)) - { - s0 = - nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0, - thread_index, now, vm, - node); - other_packets++; - if (!sm->forwarding_enabled) - { - if (!s0) - next0 = NAT_NEXT_DROP; - goto trace0; - } - } - - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + s0 = + nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0, + thread_index, now, vm, node); + other_packets++; + if (!sm->forwarding_enabled) { - next0 = icmp_out2in_ed_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, thread_index, &s0); - icmp_packets++; + if (!s0) + next0 = NAT_NEXT_DROP; goto trace0; } } - else - { - if (PREDICT_FALSE (proto0 == ~0)) - { - next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; - goto trace0; - } - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; - goto trace0; - } + if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + { + next0 = icmp_out2in_ed_slow_path + (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, + next0, now, thread_index, &s0); + icmp_packets++; + goto trace0; } make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address, @@ -1406,87 +1013,80 @@ nat44_ed_out2in_node_fn_inline (vlib_main_t * vm, if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0)) { - if (is_slow_path) + /* Try to match static mapping by external address and port, + destination address and port in packet */ + e_key0.addr = ip0->dst_address; + e_key0.port = vnet_buffer (b0)->ip.reass.l4_dst_port; + e_key0.protocol = proto0; + e_key0.fib_index = rx_fib_index0; + + if (snat_static_mapping_match (sm, e_key0, &l_key0, 1, 0, + &twice_nat0, &lb_nat0, + &ip0->src_address, + &identity_nat0)) { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - e_key0.addr = ip0->dst_address; - e_key0.port = vnet_buffer (b0)->ip.reass.l4_dst_port; - e_key0.protocol = proto0; - e_key0.fib_index = rx_fib_index0; - if (snat_static_mapping_match (sm, e_key0, &l_key0, 1, 0, - &twice_nat0, &lb_nat0, - &ip0->src_address, - &identity_nat0)) + /* + * Send DHCP packets to the ipv4 stack, or we won't + * be able to use dhcp client on the outside interface + */ + if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP + && (vnet_buffer (b0)->ip. + reass.l4_dst_port == + clib_host_to_net_u16 + (UDP_DST_PORT_dhcp_to_client)))) { - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ - if (PREDICT_FALSE - (proto0 == SNAT_PROTOCOL_UDP - && (vnet_buffer (b0)->ip.reass.l4_dst_port == - clib_host_to_net_u16 - (UDP_DST_PORT_dhcp_to_client)))) - { - goto trace0; - } - - if (!sm->forwarding_enabled) - { - b0->error = - node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; - next0 = NAT_NEXT_DROP; - } - else - { - if (next_src_nat - (sm, ip0, ip0->protocol, - vnet_buffer (b0)->ip.reass.l4_src_port, - vnet_buffer (b0)->ip.reass.l4_dst_port, - thread_index, rx_fib_index0)) - { - next0 = NAT_NEXT_IN2OUT_ED_FAST_PATH; - goto trace0; - } - if (sm->num_workers > 1) - create_bypass_for_fwd_worker (sm, b0, ip0, - rx_fib_index0); - else - create_bypass_for_fwd (sm, b0, ip0, rx_fib_index0, - thread_index); - } goto trace0; } - if (PREDICT_FALSE (identity_nat0)) - goto trace0; - - if ((proto0 == SNAT_PROTOCOL_TCP) - && !tcp_flags_is_init (vnet_buffer (b0)->ip. - reass.icmp_type_or_tcp_flags)) + if (!sm->forwarding_enabled) { - b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN]; + b0->error = + node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; next0 = NAT_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, - thread_index, - twice_nat0, - lb_nat0, now); - - if (!s0) + else { - next0 = NAT_NEXT_DROP; - goto trace0; + if (next_src_nat (sm, ip0, ip0->protocol, + vnet_buffer (b0)->ip. + reass.l4_src_port, + vnet_buffer (b0)->ip. + reass.l4_dst_port, thread_index, + rx_fib_index0)) + { + next0 = NAT_NEXT_IN2OUT_ED_FAST_PATH; + goto trace0; + } + if (sm->num_workers > 1) + create_bypass_for_fwd_worker (sm, b0, ip0, + rx_fib_index0); + else + create_bypass_for_fwd (sm, b0, ip0, rx_fib_index0, + thread_index); } + goto trace0; } - else + + if (PREDICT_FALSE (identity_nat0)) + goto trace0; + + if ((proto0 == SNAT_PROTOCOL_TCP) + && !tcp_flags_is_init (vnet_buffer (b0)->ip. + reass.icmp_type_or_tcp_flags)) + { + b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN]; + next0 = NAT_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, + thread_index, + twice_nat0, + lb_nat0, now); + if (!s0) { - next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + next0 = NAT_NEXT_DROP; goto trace0; } } @@ -1597,12 +1197,14 @@ nat44_ed_out2in_node_fn_inline (vlib_main_t * vm, { nat44_ed_out2in_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); - t->is_slow_path = is_slow_path; t->sw_if_index = sw_if_index0; t->next_index = next0; - t->session_index = ~0; + t->is_slow_path = 1; + if (s0) t->session_index = s0 - tsm->sessions; + else + t->session_index = ~0; } pkts_processed += next0 == nat_buffer_opaque (b0)->arc_next; @@ -1637,7 +1239,7 @@ VLIB_NODE_FN (nat44_ed_out2in_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { - return nat44_ed_out2in_node_fn_inline (vm, node, frame, 0); + return nat44_ed_out2in_fast_path_node_fn_inline (vm, node, frame); } /* *INDENT-OFF* */ @@ -1657,7 +1259,7 @@ VLIB_NODE_FN (nat44_ed_out2in_slowpath_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { - return nat44_ed_out2in_node_fn_inline (vm, node, frame, 1); + return nat44_ed_out2in_slow_path_node_fn_inline (vm, node, frame); } /* *INDENT-OFF* */ |