diff options
Diffstat (limited to 'src/plugins/nat/out2in.c')
| -rw-r--r-- | src/plugins/nat/out2in.c | 1334 |
1 files changed, 642 insertions, 692 deletions
diff --git a/src/plugins/nat/out2in.c b/src/plugins/nat/out2in.c index 071e16d4416..4e6ceb72f6a 100644 --- a/src/plugins/nat/out2in.c +++ b/src/plugins/nat/out2in.c @@ -724,8 +724,7 @@ VLIB_NODE_FN (snat_out2in_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { - u32 n_left_from, *from, *to_next; - snat_out2in_next_t next_index; + u32 n_left_from, *from; u32 pkts_processed = 0; snat_main_t *sm = &snat_main; f64 now = vlib_time_now (vm); @@ -736,658 +735,626 @@ VLIB_NODE_FN (snat_out2in_node) (vlib_main_t * vm, from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; - next_index = node->cached_next_index; - while (n_left_from > 0) + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; + u16 nexts[VLIB_FRAME_SIZE], *next = nexts; + vlib_get_buffers (vm, from, b, n_left_from); + + while (n_left_from >= 2) { - u32 n_left_to_next; + vlib_buffer_t *b0, *b1; + u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP; + u32 next1 = SNAT_OUT2IN_NEXT_LOOKUP; + u32 sw_if_index0, sw_if_index1; + ip4_header_t *ip0, *ip1; + ip_csum_t sum0, sum1; + u32 new_addr0, old_addr0; + u16 new_port0, old_port0; + u32 new_addr1, old_addr1; + u16 new_port1, old_port1; + udp_header_t *udp0, *udp1; + tcp_header_t *tcp0, *tcp1; + icmp46_header_t *icmp0, *icmp1; + u32 rx_fib_index0, rx_fib_index1; + u32 proto0, proto1; + snat_session_t *s0 = 0, *s1 = 0; + clib_bihash_kv_8_8_t kv0, kv1, value0, value1; + u8 identity_nat0, identity_nat1; + ip4_address_t sm_addr0, sm_addr1; + u16 sm_port0, sm_port1; + u32 sm_fib_index0, sm_fib_index1; + + b0 = *b; + b++; + b1 = *b; + b++; + + /* Prefetch next iteration. */ + if (PREDICT_TRUE (n_left_from >= 4)) + { + vlib_buffer_t *p2, *p3; + + p2 = *b; + p3 = *(b + 1); + + vlib_prefetch_buffer_header (p2, LOAD); + vlib_prefetch_buffer_header (p3, LOAD); + + CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, LOAD); + } - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + vnet_buffer (b0)->snat.flags = 0; + vnet_buffer (b1)->snat.flags = 0; - while (n_left_from >= 4 && n_left_to_next >= 2) + ip0 = vlib_buffer_get_current (b0); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, + sw_if_index0); + + if (PREDICT_FALSE (ip0->ttl == 1)) { - u32 bi0, bi1; - vlib_buffer_t *b0, *b1; - u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP; - u32 next1 = SNAT_OUT2IN_NEXT_LOOKUP; - u32 sw_if_index0, sw_if_index1; - ip4_header_t *ip0, *ip1; - ip_csum_t sum0, sum1; - u32 new_addr0, old_addr0; - u16 new_port0, old_port0; - u32 new_addr1, old_addr1; - u16 new_port1, old_port1; - udp_header_t *udp0, *udp1; - tcp_header_t *tcp0, *tcp1; - icmp46_header_t *icmp0, *icmp1; - u32 rx_fib_index0, rx_fib_index1; - u32 proto0, proto1; - snat_session_t *s0 = 0, *s1 = 0; - clib_bihash_kv_8_8_t kv0, kv1, value0, value1; - u8 identity_nat0, identity_nat1; - ip4_address_t sm_addr0, sm_addr1; - u16 sm_port0, sm_port1; - u32 sm_fib_index0, sm_fib_index1; - - /* 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, LOAD); - CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, LOAD); - } - - /* 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; - - b0 = vlib_get_buffer (vm, bi0); - b1 = vlib_get_buffer (vm, bi1); - - vnet_buffer (b0)->snat.flags = 0; - vnet_buffer (b1)->snat.flags = 0; - - ip0 = vlib_buffer_get_current (b0); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; - - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, - sw_if_index0); - - if (PREDICT_FALSE (ip0->ttl == 1)) - { - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; - goto trace0; - } + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + goto trace0; + } - proto0 = ip_proto_to_nat_proto (ip0->protocol); + proto0 = ip_proto_to_nat_proto (ip0->protocol); - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) + { + if (nat_out2in_sm_unknown_proto (sm, b0, ip0, rx_fib_index0)) { - if (nat_out2in_sm_unknown_proto (sm, b0, ip0, rx_fib_index0)) + if (!sm->forwarding_enabled) { - if (!sm->forwarding_enabled) - { - b0->error = - node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; - next0 = SNAT_OUT2IN_NEXT_DROP; - } + b0->error = + node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; + next0 = SNAT_OUT2IN_NEXT_DROP; } - other_packets++; - goto trace0; } + other_packets++; + goto trace0; + } - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) - { - next0 = icmp_out2in_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, thread_index, &s0); - icmp_packets++; - goto trace0; - } + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + { + next0 = icmp_out2in_slow_path + (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, + next0, now, thread_index, &s0); + icmp_packets++; + goto trace0; + } - init_nat_k (&kv0, ip0->dst_address, - vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, - proto0); - if (clib_bihash_search_8_8 - (&sm->per_thread_data[thread_index].out2in, &kv0, &value0)) + init_nat_k (&kv0, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, + proto0); + if (clib_bihash_search_8_8 + (&sm->per_thread_data[thread_index].out2in, &kv0, &value0)) + { + /* Try to match static mapping by external address and port, + destination address and port in packet */ + if (snat_static_mapping_match + (sm, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, + proto0, &sm_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0, + 0, &identity_nat0)) { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - if (snat_static_mapping_match - (sm, ip0->dst_address, - vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, - proto0, &sm_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0, - 0, &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 == NAT_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 == NAT_PROTOCOL_UDP - && (vnet_buffer (b0)->ip.reass.l4_dst_port == - clib_host_to_net_u16 - (UDP_DST_PORT_dhcp_to_client)))) - { - vnet_feature_next (&next0, b0); - goto trace0; - } - - if (!sm->forwarding_enabled) - { - b0->error = - node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next0 = SNAT_OUT2IN_NEXT_DROP; - } + vnet_feature_next (&next0, b0); goto trace0; } - if (PREDICT_FALSE (identity_nat0)) - goto trace0; - - /* Create session initiated by host from external network */ - s0 = create_session_for_static_mapping (sm, b0, - sm_addr0, sm_port0, - sm_fib_index0, - ip0->dst_address, - vnet_buffer (b0)-> - ip.reass.l4_dst_port, - rx_fib_index0, proto0, - node, thread_index, - now); - if (!s0) + if (!sm->forwarding_enabled) { + b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; next0 = SNAT_OUT2IN_NEXT_DROP; - goto trace0; } + goto trace0; } - else - s0 = pool_elt_at_index (tsm->sessions, value0.value); - old_addr0 = ip0->dst_address.as_u32; - ip0->dst_address = s0->in2out.addr; - new_addr0 = ip0->dst_address.as_u32; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; + if (PREDICT_FALSE (identity_nat0)) + goto trace0; + + /* Create session initiated by host from external network */ + s0 = create_session_for_static_mapping (sm, b0, + sm_addr0, sm_port0, + sm_fib_index0, + ip0->dst_address, + vnet_buffer (b0)->ip. + reass.l4_dst_port, + rx_fib_index0, proto0, node, + thread_index, now); + if (!s0) + { + next0 = SNAT_OUT2IN_NEXT_DROP; + goto trace0; + } + } + else + s0 = pool_elt_at_index (tsm->sessions, value0.value); + + old_addr0 = ip0->dst_address.as_u32; + ip0->dst_address = s0->in2out.addr; + new_addr0 = ip0->dst_address.as_u32; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */ ); - ip0->checksum = ip_csum_fold (sum0); + sum0 = ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, dst_address /* changed member */ ); + ip0->checksum = ip_csum_fold (sum0); - if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) + if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) - { - old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; - new_port0 = udp0->dst_port = s0->in2out.port; - sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */ ); - - sum0 = ip_csum_update (sum0, old_port0, new_port0, - ip4_header_t /* cheat */ , - length /* changed member */ ); - tcp0->checksum = ip_csum_fold (sum0); - } - tcp_packets++; + old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; + new_port0 = udp0->dst_port = s0->in2out.port; + sum0 = tcp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, + dst_address /* changed member */ ); + + sum0 = ip_csum_update (sum0, old_port0, new_port0, + ip4_header_t /* cheat */ , + length /* changed member */ ); + tcp0->checksum = ip_csum_fold (sum0); } - else + tcp_packets++; + } + else + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) + old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; + new_port0 = udp0->dst_port = s0->in2out.port; + if (PREDICT_FALSE (udp0->checksum)) { - old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; - new_port0 = udp0->dst_port = s0->in2out.port; - if (PREDICT_FALSE (udp0->checksum)) - { - sum0 = udp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, dst_address /* changed member */ - ); - sum0 = - ip_csum_update (sum0, old_port0, new_port0, - ip4_header_t /* cheat */ , - length /* changed member */ ); - udp0->checksum = ip_csum_fold (sum0); - } + sum0 = udp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, dst_address /* changed member */ + ); + sum0 = + ip_csum_update (sum0, old_port0, new_port0, + ip4_header_t /* cheat */ , + length /* changed member */ ); + udp0->checksum = ip_csum_fold (sum0); } - udp_packets++; } + udp_packets++; + } - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain (vm, b0), - thread_index); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s0, thread_index); - trace0: + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, b0), + thread_index); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s0, thread_index); + trace0: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - snat_out2in_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->session_index = ~0; - if (s0) - t->session_index = - s0 - sm->per_thread_data[thread_index].sessions; - } + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + snat_out2in_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + t->session_index = ~0; + if (s0) + t->session_index = + s0 - sm->per_thread_data[thread_index].sessions; + } - pkts_processed += next0 == SNAT_OUT2IN_NEXT_LOOKUP; + pkts_processed += next0 == SNAT_OUT2IN_NEXT_LOOKUP; - ip1 = vlib_buffer_get_current (b1); - udp1 = ip4_next_header (ip1); - tcp1 = (tcp_header_t *) udp1; - icmp1 = (icmp46_header_t *) udp1; + ip1 = vlib_buffer_get_current (b1); + udp1 = ip4_next_header (ip1); + tcp1 = (tcp_header_t *) udp1; + icmp1 = (icmp46_header_t *) udp1; - sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; - rx_fib_index1 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, - sw_if_index1); + sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; + rx_fib_index1 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, + 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 = SNAT_OUT2IN_NEXT_ICMP_ERROR; - goto trace1; - } + 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 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + goto trace1; + } - proto1 = ip_proto_to_nat_proto (ip1->protocol); + proto1 = ip_proto_to_nat_proto (ip1->protocol); - if (PREDICT_FALSE (proto1 == NAT_PROTOCOL_OTHER)) + if (PREDICT_FALSE (proto1 == NAT_PROTOCOL_OTHER)) + { + if (nat_out2in_sm_unknown_proto (sm, b1, ip1, rx_fib_index1)) { - if (nat_out2in_sm_unknown_proto (sm, b1, ip1, rx_fib_index1)) + if (!sm->forwarding_enabled) { - if (!sm->forwarding_enabled) - { - b1->error = - node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; - next1 = SNAT_OUT2IN_NEXT_DROP; - } + b1->error = + node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; + next1 = SNAT_OUT2IN_NEXT_DROP; } - other_packets++; - goto trace1; } + other_packets++; + goto trace1; + } - if (PREDICT_FALSE (proto1 == NAT_PROTOCOL_ICMP)) - { - next1 = icmp_out2in_slow_path - (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node, - next1, now, thread_index, &s1); - icmp_packets++; - goto trace1; - } + if (PREDICT_FALSE (proto1 == NAT_PROTOCOL_ICMP)) + { + next1 = icmp_out2in_slow_path + (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node, + next1, now, thread_index, &s1); + icmp_packets++; + goto trace1; + } - init_nat_k (&kv1, ip1->dst_address, - vnet_buffer (b1)->ip.reass.l4_dst_port, rx_fib_index1, - proto1); + init_nat_k (&kv1, ip1->dst_address, + vnet_buffer (b1)->ip.reass.l4_dst_port, rx_fib_index1, + proto1); - if (clib_bihash_search_8_8 - (&sm->per_thread_data[thread_index].out2in, &kv1, &value1)) + if (clib_bihash_search_8_8 + (&sm->per_thread_data[thread_index].out2in, &kv1, &value1)) + { + /* Try to match static mapping by external address and port, + destination address and port in packet */ + if (snat_static_mapping_match + (sm, ip1->dst_address, + vnet_buffer (b1)->ip.reass.l4_dst_port, proto1, + rx_fib_index1, &sm_addr1, &sm_port1, &sm_fib_index1, 1, 0, + 0, 0, 0, &identity_nat1)) { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - if (snat_static_mapping_match - (sm, ip1->dst_address, - vnet_buffer (b1)->ip.reass.l4_dst_port, proto1, - rx_fib_index1, &sm_addr1, &sm_port1, &sm_fib_index1, 1, 0, - 0, 0, 0, &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 == NAT_PROTOCOL_UDP + && (vnet_buffer (b1)->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 - (proto1 == NAT_PROTOCOL_UDP - && (vnet_buffer (b1)->ip.reass.l4_dst_port == - clib_host_to_net_u16 - (UDP_DST_PORT_dhcp_to_client)))) - { - vnet_feature_next (&next1, b1); - goto trace1; - } - - if (!sm->forwarding_enabled) - { - b1->error = - node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next1 = SNAT_OUT2IN_NEXT_DROP; - } + vnet_feature_next (&next1, b1); goto trace1; } - if (PREDICT_FALSE (identity_nat1)) - goto trace1; - - /* Create session initiated by host from external network */ - s1 = - create_session_for_static_mapping (sm, b1, sm_addr1, sm_port1, - sm_fib_index1, - ip1->dst_address, - vnet_buffer (b1)->ip. - reass.l4_dst_port, - rx_fib_index1, proto1, - node, thread_index, now); - if (!s1) + if (!sm->forwarding_enabled) { + b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; next1 = SNAT_OUT2IN_NEXT_DROP; - goto trace1; } + goto trace1; } - else - s1 = - pool_elt_at_index (sm->per_thread_data[thread_index].sessions, - value1.value); - - old_addr1 = ip1->dst_address.as_u32; - ip1->dst_address = s1->in2out.addr; - new_addr1 = ip1->dst_address.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 /* changed member */ ); - ip1->checksum = ip_csum_fold (sum1); - - if (PREDICT_TRUE (proto1 == NAT_PROTOCOL_TCP)) + + if (PREDICT_FALSE (identity_nat1)) + goto trace1; + + /* Create session initiated by host from external network */ + s1 = + create_session_for_static_mapping (sm, b1, sm_addr1, sm_port1, + sm_fib_index1, + ip1->dst_address, + vnet_buffer (b1)->ip. + reass.l4_dst_port, + rx_fib_index1, proto1, node, + thread_index, now); + if (!s1) { - if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment) - { - old_port1 = vnet_buffer (b1)->ip.reass.l4_dst_port; - new_port1 = udp1->dst_port = s1->in2out.port; - - sum1 = tcp1->checksum; - sum1 = ip_csum_update (sum1, old_addr1, new_addr1, - ip4_header_t, - dst_address /* changed member */ ); - - sum1 = ip_csum_update (sum1, old_port1, new_port1, - ip4_header_t /* cheat */ , - length /* changed member */ ); - tcp1->checksum = ip_csum_fold (sum1); - } - tcp_packets++; + next1 = SNAT_OUT2IN_NEXT_DROP; + goto trace1; } - else + } + else + s1 = + pool_elt_at_index (sm->per_thread_data[thread_index].sessions, + value1.value); + + old_addr1 = ip1->dst_address.as_u32; + ip1->dst_address = s1->in2out.addr; + new_addr1 = ip1->dst_address.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 /* changed member */ ); + ip1->checksum = ip_csum_fold (sum1); + + if (PREDICT_TRUE (proto1 == NAT_PROTOCOL_TCP)) + { + if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment) + { + old_port1 = vnet_buffer (b1)->ip.reass.l4_dst_port; + new_port1 = udp1->dst_port = s1->in2out.port; + + sum1 = tcp1->checksum; + sum1 = ip_csum_update (sum1, old_addr1, new_addr1, + ip4_header_t, + dst_address /* changed member */ ); + + sum1 = ip_csum_update (sum1, old_port1, new_port1, + ip4_header_t /* cheat */ , + length /* changed member */ ); + tcp1->checksum = ip_csum_fold (sum1); + } + tcp_packets++; + } + else + { + if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment) { - if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment) + old_port1 = vnet_buffer (b1)->ip.reass.l4_dst_port; + new_port1 = udp1->dst_port = s1->in2out.port; + if (PREDICT_FALSE (udp1->checksum)) { - old_port1 = vnet_buffer (b1)->ip.reass.l4_dst_port; - new_port1 = udp1->dst_port = s1->in2out.port; - if (PREDICT_FALSE (udp1->checksum)) - { - - sum1 = udp1->checksum; - sum1 = - ip_csum_update (sum1, old_addr1, new_addr1, - ip4_header_t, - dst_address /* changed member */ ); - sum1 = - ip_csum_update (sum1, old_port1, new_port1, - ip4_header_t /* cheat */ , - length /* changed member */ ); - udp1->checksum = ip_csum_fold (sum1); - } + + sum1 = udp1->checksum; + sum1 = + ip_csum_update (sum1, old_addr1, new_addr1, + ip4_header_t, + dst_address /* changed member */ ); + sum1 = + ip_csum_update (sum1, old_port1, new_port1, + ip4_header_t /* cheat */ , + length /* changed member */ ); + udp1->checksum = ip_csum_fold (sum1); } - udp_packets++; } + udp_packets++; + } - /* 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); - trace1: + /* 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); + trace1: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b1->flags & VLIB_BUFFER_IS_TRACED))) - { - snat_out2in_trace_t *t = - vlib_add_trace (vm, node, b1, sizeof (*t)); - t->sw_if_index = sw_if_index1; - t->next_index = next1; - t->session_index = ~0; - if (s1) - t->session_index = - s1 - sm->per_thread_data[thread_index].sessions; - } + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b1->flags & VLIB_BUFFER_IS_TRACED))) + { + snat_out2in_trace_t *t = vlib_add_trace (vm, node, b1, sizeof (*t)); + t->sw_if_index = sw_if_index1; + t->next_index = next1; + t->session_index = ~0; + if (s1) + t->session_index = + s1 - sm->per_thread_data[thread_index].sessions; + } - pkts_processed += next1 == SNAT_OUT2IN_NEXT_LOOKUP; + pkts_processed += next1 == SNAT_OUT2IN_NEXT_LOOKUP; - /* 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); - } + n_left_from -= 2; + next[0] = next0; + next[1] = next1; + next += 2; + } - while (n_left_from > 0 && n_left_to_next > 0) + while (n_left_from > 0) + { + vlib_buffer_t *b0; + u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP; + u32 sw_if_index0; + ip4_header_t *ip0; + ip_csum_t sum0; + u32 new_addr0, old_addr0; + u16 new_port0, old_port0; + udp_header_t *udp0; + tcp_header_t *tcp0; + icmp46_header_t *icmp0; + u32 rx_fib_index0; + u32 proto0; + snat_session_t *s0 = 0; + clib_bihash_kv_8_8_t kv0, value0; + u8 identity_nat0; + ip4_address_t sm_addr0; + u16 sm_port0; + u32 sm_fib_index0; + + b0 = *b; + ++b; + + vnet_buffer (b0)->snat.flags = 0; + + ip0 = vlib_buffer_get_current (b0); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, + sw_if_index0); + + proto0 = ip_proto_to_nat_proto (ip0->protocol); + + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) { - u32 bi0; - vlib_buffer_t *b0; - u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP; - u32 sw_if_index0; - ip4_header_t *ip0; - ip_csum_t sum0; - u32 new_addr0, old_addr0; - u16 new_port0, old_port0; - udp_header_t *udp0; - tcp_header_t *tcp0; - icmp46_header_t *icmp0; - u32 rx_fib_index0; - u32 proto0; - snat_session_t *s0 = 0; - clib_bihash_kv_8_8_t kv0, value0; - u8 identity_nat0; - ip4_address_t sm_addr0; - u16 sm_port0; - u32 sm_fib_index0; - - /* 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); - - vnet_buffer (b0)->snat.flags = 0; - - ip0 = vlib_buffer_get_current (b0); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; - - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, - sw_if_index0); - - proto0 = ip_proto_to_nat_proto (ip0->protocol); - - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) + if (nat_out2in_sm_unknown_proto (sm, b0, ip0, rx_fib_index0)) { - if (nat_out2in_sm_unknown_proto (sm, b0, ip0, rx_fib_index0)) + if (!sm->forwarding_enabled) { - if (!sm->forwarding_enabled) - { - b0->error = - node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; - next0 = SNAT_OUT2IN_NEXT_DROP; - } + b0->error = + node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; + next0 = SNAT_OUT2IN_NEXT_DROP; } - other_packets++; - goto trace00; } + other_packets++; + goto trace00; + } - if (PREDICT_FALSE (ip0->ttl == 1)) - { - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; - goto trace00; - } + if (PREDICT_FALSE (ip0->ttl == 1)) + { + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + goto trace00; + } - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) - { - next0 = icmp_out2in_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, thread_index, &s0); - icmp_packets++; - goto trace00; - } + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + { + next0 = icmp_out2in_slow_path + (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, + next0, now, thread_index, &s0); + icmp_packets++; + goto trace00; + } - init_nat_k (&kv0, ip0->dst_address, - vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, - proto0); + init_nat_k (&kv0, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, + proto0); - if (clib_bihash_search_8_8 - (&sm->per_thread_data[thread_index].out2in, &kv0, &value0)) + if (clib_bihash_search_8_8 + (&sm->per_thread_data[thread_index].out2in, &kv0, &value0)) + { + /* Try to match static mapping by external address and port, + destination address and port in packet */ + if (snat_static_mapping_match + (sm, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, + proto0, &sm_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0, + 0, &identity_nat0)) { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - if (snat_static_mapping_match - (sm, ip0->dst_address, - vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, - proto0, &sm_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0, - 0, &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 == NAT_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 == NAT_PROTOCOL_UDP - && (vnet_buffer (b0)->ip.reass.l4_dst_port == - clib_host_to_net_u16 - (UDP_DST_PORT_dhcp_to_client)))) - { - vnet_feature_next (&next0, b0); - goto trace00; - } - - if (!sm->forwarding_enabled) - { - b0->error = - node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next0 = SNAT_OUT2IN_NEXT_DROP; - } + vnet_feature_next (&next0, b0); goto trace00; } - if (PREDICT_FALSE (identity_nat0)) - goto trace00; - - /* Create session initiated by host from external network */ - s0 = create_session_for_static_mapping (sm, b0, - sm_addr0, sm_port0, - sm_fib_index0, - ip0->dst_address, - vnet_buffer (b0)-> - ip.reass.l4_dst_port, - rx_fib_index0, proto0, - node, thread_index, - now); - if (!s0) + if (!sm->forwarding_enabled) { + b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; next0 = SNAT_OUT2IN_NEXT_DROP; - goto trace00; } + goto trace00; } - else - s0 = - pool_elt_at_index (sm->per_thread_data[thread_index].sessions, - value0.value); - old_addr0 = ip0->dst_address.as_u32; - ip0->dst_address = s0->in2out.addr; - new_addr0 = ip0->dst_address.as_u32; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; + if (PREDICT_FALSE (identity_nat0)) + goto trace00; - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */ ); - ip0->checksum = ip_csum_fold (sum0); + /* Create session initiated by host from external network */ + s0 = create_session_for_static_mapping (sm, b0, + sm_addr0, sm_port0, + sm_fib_index0, + ip0->dst_address, + vnet_buffer (b0)->ip. + reass.l4_dst_port, + rx_fib_index0, proto0, node, + thread_index, now); + if (!s0) + { + next0 = SNAT_OUT2IN_NEXT_DROP; + goto trace00; + } + } + else + s0 = + pool_elt_at_index (sm->per_thread_data[thread_index].sessions, + value0.value); - if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) + old_addr0 = ip0->dst_address.as_u32; + ip0->dst_address = s0->in2out.addr; + new_addr0 = ip0->dst_address.as_u32; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; + + sum0 = ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, dst_address /* changed member */ ); + ip0->checksum = ip_csum_fold (sum0); + + if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) - { - old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; - new_port0 = udp0->dst_port = s0->in2out.port; - - sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */ ); - - sum0 = ip_csum_update (sum0, old_port0, new_port0, - ip4_header_t /* cheat */ , - length /* changed member */ ); - tcp0->checksum = ip_csum_fold (sum0); - } - tcp_packets++; + old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; + new_port0 = udp0->dst_port = s0->in2out.port; + + sum0 = tcp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, + dst_address /* changed member */ ); + + sum0 = ip_csum_update (sum0, old_port0, new_port0, + ip4_header_t /* cheat */ , + length /* changed member */ ); + tcp0->checksum = ip_csum_fold (sum0); } - else + tcp_packets++; + } + else + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) + old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; + new_port0 = udp0->dst_port = s0->in2out.port; + if (PREDICT_FALSE (udp0->checksum)) { - old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; - new_port0 = udp0->dst_port = s0->in2out.port; - if (PREDICT_FALSE (udp0->checksum)) - { - sum0 = udp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, dst_address /* changed member */ - ); - sum0 = - ip_csum_update (sum0, old_port0, new_port0, - ip4_header_t /* cheat */ , - length /* changed member */ ); - udp0->checksum = ip_csum_fold (sum0); - } + sum0 = udp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, dst_address /* changed member */ + ); + sum0 = + ip_csum_update (sum0, old_port0, new_port0, + ip4_header_t /* cheat */ , + length /* changed member */ ); + udp0->checksum = ip_csum_fold (sum0); } - udp_packets++; - } - - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain (vm, b0), - thread_index); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s0, thread_index); - trace00: - - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - snat_out2in_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->session_index = ~0; - if (s0) - t->session_index = - s0 - sm->per_thread_data[thread_index].sessions; } + udp_packets++; + } - pkts_processed += next0 == SNAT_OUT2IN_NEXT_LOOKUP; + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, b0), + thread_index); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s0, thread_index); + trace00: - /* 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_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + snat_out2in_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + t->session_index = ~0; + if (s0) + t->session_index = + s0 - sm->per_thread_data[thread_index].sessions; } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); + pkts_processed += next0 == SNAT_OUT2IN_NEXT_LOOKUP; + + n_left_from--; + next[0] = next0; + next++; } + vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, + frame->n_vectors); + vlib_node_increment_counter (vm, sm->out2in_node_index, SNAT_OUT2IN_ERROR_OUT2IN_PACKETS, pkts_processed); @@ -1433,173 +1400,156 @@ VLIB_NODE_FN (snat_out2in_fast_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { - u32 n_left_from, *from, *to_next; - snat_out2in_next_t next_index; + u32 n_left_from, *from; u32 pkts_processed = 0; snat_main_t *sm = &snat_main; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; - next_index = node->cached_next_index; + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; + u16 nexts[VLIB_FRAME_SIZE], *next = nexts; + vlib_get_buffers (vm, from, b, n_left_from); while (n_left_from > 0) { - u32 n_left_to_next; + vlib_buffer_t *b0; + u32 next0 = SNAT_OUT2IN_NEXT_DROP; + u32 sw_if_index0; + ip4_header_t *ip0; + ip_csum_t sum0; + u32 new_addr0, old_addr0; + u16 new_port0, old_port0; + udp_header_t *udp0; + tcp_header_t *tcp0; + icmp46_header_t *icmp0; + u32 proto0; + u32 rx_fib_index0; + ip4_address_t sm_addr0; + u16 sm_port0; + u32 sm_fib_index0; + + b0 = *b; + b++; + + ip0 = vlib_buffer_get_current (b0); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0); + + vnet_feature_next (&next0, b0); + + if (PREDICT_FALSE (ip0->ttl == 1)) + { + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + goto trace00; + } - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + proto0 = ip_proto_to_nat_proto (ip0->protocol); - while (n_left_from > 0 && n_left_to_next > 0) + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) + goto trace00; + + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) { - u32 bi0; - vlib_buffer_t *b0; - u32 next0 = SNAT_OUT2IN_NEXT_DROP; - u32 sw_if_index0; - ip4_header_t *ip0; - ip_csum_t sum0; - u32 new_addr0, old_addr0; - u16 new_port0, old_port0; - udp_header_t *udp0; - tcp_header_t *tcp0; - icmp46_header_t *icmp0; - u32 proto0; - u32 rx_fib_index0; - ip4_address_t sm_addr0; - u16 sm_port0; - u32 sm_fib_index0; - - /* 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); - - ip0 = vlib_buffer_get_current (b0); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; - - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = - ip4_fib_table_get_index_for_sw_if_index (sw_if_index0); - - vnet_feature_next (&next0, b0); - - if (PREDICT_FALSE (ip0->ttl == 1)) - { - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; - goto trace00; - } + next0 = icmp_out2in (sm, b0, ip0, icmp0, sw_if_index0, + rx_fib_index0, node, next0, ~0, 0, 0); + goto trace00; + } - proto0 = ip_proto_to_nat_proto (ip0->protocol); + if (snat_static_mapping_match + (sm, ip0->dst_address, udp0->dst_port, rx_fib_index0, proto0, + &sm_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0, 0, 0)) + { + b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + goto trace00; + } - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) - goto trace00; + new_addr0 = sm_addr0.as_u32; + new_port0 = sm_port0; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm_fib_index0; + old_addr0 = ip0->dst_address.as_u32; + ip0->dst_address.as_u32 = new_addr0; - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) - { - next0 = icmp_out2in (sm, b0, ip0, icmp0, sw_if_index0, - rx_fib_index0, node, next0, ~0, 0, 0); - goto trace00; - } + sum0 = ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, dst_address /* changed member */ ); + ip0->checksum = ip_csum_fold (sum0); - if (snat_static_mapping_match - (sm, ip0->dst_address, udp0->dst_port, rx_fib_index0, proto0, - &sm_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0, 0, 0)) + if (PREDICT_FALSE (new_port0 != udp0->dst_port)) + { + old_port0 = udp0->dst_port; + udp0->dst_port = new_port0; + + if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) { - b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - goto trace00; + sum0 = tcp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, + dst_address /* changed member */ ); + sum0 = ip_csum_update (sum0, old_port0, new_port0, + ip4_header_t /* cheat */ , + length /* changed member */ ); + tcp0->checksum = ip_csum_fold (sum0); } - - new_addr0 = sm_addr0.as_u32; - new_port0 = sm_port0; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm_fib_index0; - old_addr0 = ip0->dst_address.as_u32; - ip0->dst_address.as_u32 = new_addr0; - - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */ ); - ip0->checksum = ip_csum_fold (sum0); - - if (PREDICT_FALSE (new_port0 != udp0->dst_port)) + else if (udp0->checksum) { - old_port0 = udp0->dst_port; - udp0->dst_port = new_port0; - - if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) - { - sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */ ); - sum0 = ip_csum_update (sum0, old_port0, new_port0, - ip4_header_t /* cheat */ , - length /* changed member */ ); - tcp0->checksum = ip_csum_fold (sum0); - } - else if (udp0->checksum) - { - sum0 = udp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */ ); - sum0 = ip_csum_update (sum0, old_port0, new_port0, - ip4_header_t /* cheat */ , - length /* changed member */ ); - udp0->checksum = ip_csum_fold (sum0); - } + sum0 = udp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, + dst_address /* changed member */ ); + sum0 = ip_csum_update (sum0, old_port0, new_port0, + ip4_header_t /* cheat */ , + length /* changed member */ ); + udp0->checksum = ip_csum_fold (sum0); } - else + } + else + { + if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) { - if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) - { - sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */ ); - tcp0->checksum = ip_csum_fold (sum0); - } - else if (udp0->checksum) - { - sum0 = udp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */ ); - udp0->checksum = ip_csum_fold (sum0); - } + sum0 = tcp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, + dst_address /* changed member */ ); + tcp0->checksum = ip_csum_fold (sum0); } - - trace00: - - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) + else if (udp0->checksum) { - snat_out2in_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->next_index = next0; + sum0 = udp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, + dst_address /* changed member */ ); + udp0->checksum = ip_csum_fold (sum0); } + } - pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP; + trace00: - /* 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_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + snat_out2in_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next0; } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); + pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP; + + n_left_from--; + next[0] = next0; + next++; } + vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, + frame->n_vectors); + vlib_node_increment_counter (vm, sm->out2in_fast_node_index, SNAT_OUT2IN_ERROR_OUT2IN_PACKETS, pkts_processed); |