X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fnat%2Fin2out_ed.c;h=448e967b8ae3cfcda764a983ad6515a865e4fd23;hb=6484f4b9c;hp=e5f29e4b445708214dc9ee870b56146e16b2c678;hpb=1523c347d8f9e2a628d733e97f76d39b879861f0;p=vpp.git diff --git a/src/plugins/nat/in2out_ed.c b/src/plugins/nat/in2out_ed.c index e5f29e4b445..448e967b8ae 100644 --- a/src/plugins/nat/in2out_ed.c +++ b/src/plugins/nat/in2out_ed.c @@ -34,6 +34,11 @@ #include #include +/* number of attempts to get a port for ED overloading algorithm, if rolling + * a dice this many times doesn't produce a free port, it's treated + * as if there were no free ports available to conserve resources */ +#define ED_PORT_ALLOC_ATTEMPTS (10) + static char *nat_in2out_ed_error_strings[] = { #define _(sym,string) string, foreach_nat_in2out_ed_error @@ -217,17 +222,17 @@ nat_ed_alloc_addr_and_port (snat_main_t * sm, u32 rx_fib_index, if (a->fib_index == rx_fib_index) \ { \ /* first try port suggested by caller */ \ - u16 port = clib_net_to_host_u16 (*outside_port); \ + u16 port = clib_net_to_host_u16 (*outside_port); \ u16 port_offset = port - port_thread_offset; \ if (port <= port_thread_offset || \ port > port_thread_offset + port_per_thread) \ { \ /* need to pick a different port, suggested port doesn't fit in \ * this thread's port range */ \ - port_offset = snat_random_port (1, port_per_thread); \ + port_offset = snat_random_port (0, port_per_thread - 1); \ port = port_thread_offset + port_offset; \ } \ - u16 attempts = port_per_thread; \ + u16 attempts = ED_PORT_ALLOC_ATTEMPTS; \ do \ { \ init_ed_kv (out2in_ed_kv, a->addr, clib_host_to_net_u16 (port), \ @@ -240,11 +245,11 @@ nat_ed_alloc_addr_and_port (snat_main_t * sm, u32 rx_fib_index, ++a->busy_##n##_port_refcounts[port]; \ a->busy_##n##_ports_per_thread[thread_index]++; \ a->busy_##n##_ports++; \ - *outside_addr = a->addr; \ - *outside_port = clib_host_to_net_u16 (port); \ + *outside_addr = a->addr; \ + *outside_port = clib_host_to_net_u16 (port); \ return 0; \ } \ - port_offset = (port_offset + 1) % port_per_thread; \ + port_offset = snat_random_port (0, port_per_thread - 1); \ port = port_thread_offset + port_offset; \ --attempts; \ } \ @@ -365,7 +370,7 @@ slow_path_ed (snat_main_t * sm, /* First try to match static mapping by local address and port */ if (snat_static_mapping_match (sm, l_addr, l_port, rx_fib_index, nat_proto, &sm_addr, &sm_port, - &sm_fib_index, 0, 0, 0, &lb, 0, &identity_nat)) + &sm_fib_index, 0, 0, 0, &lb, 0, &identity_nat, 0)) { s = nat_ed_session_alloc (sm, thread_index, now, proto); ASSERT (s); @@ -483,6 +488,8 @@ slow_path_ed (snat_main_t * sm, &s->ext_host_nat_addr, s->ext_host_nat_port, s->nat_proto, s->in2out.fib_index, s->flags, thread_index, 0); + per_vrf_sessions_register_session (s, thread_index); + return next; } @@ -501,12 +508,13 @@ nat44_ed_not_translate (snat_main_t * sm, vlib_node_runtime_t * node, if (clib_bihash_search_16_8 (&sm->out2in_ed, &kv, &value)) { /* or is static mappings */ - ip4_address_t dummy_addr; - u16 dummy_port; - u32 dummy_fib_index; + ip4_address_t placeholder_addr; + u16 placeholder_port; + u32 placeholder_fib_index; if (!snat_static_mapping_match (sm, ip->dst_address, udp->dst_port, sm->outside_fib_index, proto, - &dummy_addr, &dummy_port, &dummy_fib_index, 1, 0, 0, 0, 0, 0)) + &placeholder_addr, &placeholder_port, &placeholder_fib_index, 1, 0, + 0, 0, 0, 0, 0)) return 0; } else @@ -880,6 +888,8 @@ nat44_ed_in2out_unknown_proto (snat_main_t * sm, s - tsm->sessions); if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &s_kv, 1)) nat_elog_notice ("out2in key add failed"); + + per_vrf_sessions_register_session (s, thread_index); } /* Update IP checksum */ @@ -909,206 +919,179 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm, 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; + u32 n_left_from, *from; 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, def_slow; - - def_slow = is_output_feature ? NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH : - NAT_NEXT_IN2OUT_ED_SLOW_PATH; - - stats_node_index = sm->ed_in2out_node_index; + u32 def_slow = is_output_feature ? NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH + : NAT_NEXT_IN2OUT_ED_SLOW_PATH; 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 sw_if_index0, rx_fib_index0, proto0, new_addr0, old_addr0, + iph_offset0 = 0; + 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 = *b; + b++; + + /* Prefetch next iteration. */ + if (PREDICT_TRUE (n_left_from >= 2)) + { + vlib_buffer_t *p2; - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + p2 = *b; - while (n_left_from > 0 && n_left_to_next > 0) + vlib_prefetch_buffer_header (p2, LOAD); + + CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD); + } + + if (is_output_feature) { - u32 bi0; - vlib_buffer_t *b0; - u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0, - new_addr0, old_addr0; - 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); + vnet_feature_next (&vnet_buffer2 (b0)->nat.arc_next, b0); + iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length; + } - if (is_output_feature) - { - vnet_feature_next (&vnet_buffer2 (b0)->nat.arc_next, b0); - iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length; - } + next[0] = vnet_buffer2 (b0)->nat.arc_next; - next0 = vnet_buffer2 (b0)->nat.arc_next; + ip0 = + (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + iph_offset0); - ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + - iph_offset0); + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = + fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0); - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = - fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, - 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); + next[0] = NAT_NEXT_ICMP_ERROR; + goto trace0; + } - 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 = NAT_NEXT_ICMP_ERROR; - goto trace0; - } + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + proto0 = ip_proto_to_nat_proto (ip0->protocol); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - proto0 = ip_proto_to_nat_proto (ip0->protocol); + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) + { + next[0] = def_slow; + goto trace0; + } - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) - { - 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 (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 == NAT_PROTOCOL_ICMP)) + { + next[0] = def_slow; + goto trace0; + } - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) - { - next0 = def_slow; - goto trace0; - } + init_ed_k (&kv0, ip0->src_address, + vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, + ip0->protocol); - init_ed_k (&kv0, ip0->src_address, - vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address, - vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, - ip0->protocol); + // lookup for session + if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0)) + { + // session does not exist go slow path + next[0] = def_slow; + goto trace0; + } + ASSERT (thread_index == ed_value_get_thread_index (&value0)); + s0 = + pool_elt_at_index (tsm->sessions, + ed_value_get_session_index (&value0)); - // lookup for session - if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0)) - { - // session does not exist go slow path - next0 = def_slow; - goto trace0; - } - ASSERT (thread_index == ed_value_get_thread_index (&value0)); - s0 = - pool_elt_at_index (tsm->sessions, - ed_value_get_session_index (&value0)); + if (PREDICT_FALSE (per_vrf_sessions_is_expired (s0, thread_index))) + { + // session is closed, go slow path + nat_free_session_data (sm, s0, thread_index, 0); + nat_ed_session_delete (sm, s0, thread_index, 1); + next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + goto trace0; + } - if (s0->tcp_closed_timestamp) + if (s0->tcp_closed_timestamp) + { + if (now >= s0->tcp_closed_timestamp) { - if (now >= s0->tcp_closed_timestamp) - { - // session is closed, go slow path - next0 = def_slow; - } - else - { - // session in transitory timeout, drop - b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TCP_CLOSED]; - next0 = NAT_NEXT_DROP; - } - goto trace0; + // session is closed, go slow path, freed in slow path + next[0] = def_slow; } - - // drop if session expired - u64 sess_timeout_time; - sess_timeout_time = s0->last_heard + - (f64) nat44_session_get_timeout (sm, s0); - if (now >= sess_timeout_time) + else { - nat_free_session_data (sm, s0, thread_index, 0); - nat_ed_session_delete (sm, s0, thread_index, 1); - // session is closed, go slow path - next0 = def_slow; - goto trace0; + // session in transitory timeout, drop + b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TCP_CLOSED]; + next[0] = NAT_NEXT_DROP; } + goto trace0; + } - b0->flags |= VNET_BUFFER_F_IS_NATED; + // drop if session expired + u64 sess_timeout_time; + sess_timeout_time = + s0->last_heard + (f64) nat44_session_get_timeout (sm, s0); + if (now >= sess_timeout_time) + { + nat_free_session_data (sm, s0, thread_index, 0); + nat_ed_session_delete (sm, s0, thread_index, 1); + // session is closed, go slow path + next[0] = def_slow; + goto trace0; + } - if (!is_output_feature) - vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; + b0->flags |= VNET_BUFFER_F_IS_NATED; - old_addr0 = ip0->src_address.as_u32; - new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32; - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - src_address); - 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); - ip0->checksum = ip_csum_fold (sum0); + if (!is_output_feature) + vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; - old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port; + old_addr0 = ip0->src_address.as_u32; + new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32; + sum0 = ip0->checksum; + sum0 = + ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + src_address); + 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); + ip0->checksum = ip_csum_fold (sum0); - if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) - { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) - { - 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); - 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, - s0->ext_host_addr.as_u32, - ip4_header_t, dst_address); - sum0 = - ip_csum_update (sum0, - vnet_buffer (b0)->ip. - reass.l4_dst_port, s0->ext_host_port, - ip4_header_t, length); - tcp0->dst_port = s0->ext_host_port; - ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; - } - mss_clamping (sm->mss_clamping, tcp0, &sum0); - tcp0->checksum = ip_csum_fold (sum0); - } - tcp_packets++; - if (nat44_set_tcp_session_state_i2o - (sm, now, s0, b0, thread_index)) - goto trace0; - } - else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment - && udp0->checksum) + old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port; + + if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { new_port0 = udp0->src_port = s0->out2in.port; - sum0 = udp0->checksum; + sum0 = tcp0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, dst_address); @@ -1117,79 +1100,104 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm, 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.reass.l4_dst_port, s0->ext_host_port, ip4_header_t, length); - udp0->dst_port = s0->ext_host_port; + tcp0->dst_port = s0->ext_host_port; ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; } - udp0->checksum = ip_csum_fold (sum0); - udp_packets++; + mss_clamping (sm->mss_clamping, tcp0, &sum0); + tcp0->checksum = ip_csum_fold (sum0); } - else + vlib_increment_simple_counter (&sm->counters.fastpath.in2out_ed.tcp, + thread_index, sw_if_index0, 1); + if (nat44_set_tcp_session_state_i2o (sm, now, s0, b0, thread_index)) + 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); + 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, vnet_buffer (b0)->ip.reass.l4_dst_port, + s0->ext_host_port, ip4_header_t, length); + udp0->dst_port = s0->ext_host_port; + ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; + } + udp0->checksum = ip_csum_fold (sum0); + vlib_increment_simple_counter (&sm->counters.fastpath.in2out_ed.udp, + thread_index, sw_if_index0, 1); + } + else + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) + new_port0 = udp0->src_port = s0->out2in.port; + if (PREDICT_FALSE (is_twice_nat_session (s0))) { - new_port0 = udp0->src_port = s0->out2in.port; - if (PREDICT_FALSE (is_twice_nat_session (s0))) - { - udp0->dst_port = s0->ext_host_port; - ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; - } - udp_packets++; + udp0->dst_port = s0->ext_host_port; + ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; } + vlib_increment_simple_counter (&sm->counters.fastpath. + in2out_ed.udp, thread_index, + sw_if_index0, 1); } + } - /* 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); + /* 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))) - { - nat_in2out_ed_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->is_slow_path = 0; - - if (s0) - t->session_index = s0 - tsm->sessions; - else - t->session_index = ~0; - } + 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->sw_if_index = sw_if_index0; + t->next_index = next[0]; + t->is_slow_path = 0; + + if (s0) + t->session_index = s0 - tsm->sessions; + else + t->session_index = ~0; + } - pkts_processed += next0 == vnet_buffer2 (b0)->nat.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 (next[0] == NAT_NEXT_DROP) + { + vlib_increment_simple_counter (&sm->counters.fastpath. + in2out_ed.drops, thread_index, + sw_if_index0, 1); } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); + n_left_from--; + next++; } - 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); + vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, + frame->n_vectors); return frame->n_vectors; } @@ -1199,306 +1207,284 @@ nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm, 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; + u32 n_left_from, *from; 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; - - stats_node_index = sm->ed_in2out_slowpath_node_index; 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 sw_if_index0, rx_fib_index0, proto0, new_addr0, old_addr0, + iph_offset0 = 0; + u16 old_port0, new_port0; + ip4_header_t *ip0; + udp_header_t *udp0; + tcp_header_t *tcp0; + icmp46_header_t *icmp0; + snat_session_t *s0 = 0; + clib_bihash_kv_16_8_t kv0, value0; + ip_csum_t sum0; - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + b0 = *b; - while (n_left_from > 0 && n_left_to_next > 0) - { - u32 bi0; - vlib_buffer_t *b0; - u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0, - new_addr0, old_addr0; - u16 old_port0, new_port0; - ip4_header_t *ip0; - udp_header_t *udp0; - tcp_header_t *tcp0; - icmp46_header_t *icmp0; - 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); + if (is_output_feature) + iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length; - if (is_output_feature) - iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length; + next[0] = vnet_buffer2 (b0)->nat.arc_next; + + ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + + iph_offset0); - next0 = vnet_buffer2 (b0)->nat.arc_next; + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = + fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0); - ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + - iph_offset0); + 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); + next[0] = NAT_NEXT_ICMP_ERROR; + goto trace0; + } - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = - fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, - sw_if_index0); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; + proto0 = ip_proto_to_nat_proto (ip0->protocol); - 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 = NAT_NEXT_ICMP_ERROR; - goto trace0; - } + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) + { + s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0, + rx_fib_index0, + thread_index, now, vm, node); + if (!s0) + next[0] = NAT_NEXT_DROP; - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; - proto0 = ip_proto_to_nat_proto (ip0->protocol); + vlib_increment_simple_counter (&sm->counters.slowpath. + in2out_ed.other, thread_index, + sw_if_index0, 1); + goto trace0; + } - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) - { - 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 == NAT_PROTOCOL_ICMP)) + { + next[0] = + icmp_in2out_ed_slow_path (sm, b0, ip0, icmp0, sw_if_index0, + rx_fib_index0, node, next[0], now, + thread_index, &s0); + vlib_increment_simple_counter (&sm->counters.slowpath. + in2out_ed.icmp, thread_index, + sw_if_index0, 1); + goto trace0; + } + + init_ed_k (&kv0, ip0->src_address, + vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, + ip0->protocol); + if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0)) + { + ASSERT (thread_index == ed_value_get_thread_index (&value0)); + s0 = + pool_elt_at_index (tsm->sessions, + ed_value_get_session_index (&value0)); - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + if (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp) { - 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; + nat_free_session_data (sm, s0, thread_index, 0); + nat_ed_session_delete (sm, s0, thread_index, 1); + s0 = NULL; } + } - init_ed_k (&kv0, ip0->src_address, - vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address, - vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, - ip0->protocol); - if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0)) + if (!s0) + { + if (is_output_feature) { - ASSERT (thread_index == ed_value_get_thread_index (&value0)); - s0 = - pool_elt_at_index (tsm->sessions, - ed_value_get_session_index (&value0)); + if (PREDICT_FALSE + (nat44_ed_not_translate_output_feature + (sm, ip0, 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 (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp) - { - nat_free_session_data (sm, s0, thread_index, 0); - nat_ed_session_delete (sm, s0, thread_index, 1); - s0 = NULL; - } + /* + * 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_server)) + && ip0->dst_address.as_u32 == 0xffffffff)) + goto trace0; } - - if (!s0) + else { - if (is_output_feature) - { - if (PREDICT_FALSE - (nat44_ed_not_translate_output_feature - (sm, ip0, 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 == NAT_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; - } + 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, ip0->src_address, ip0->dst_address, - vnet_buffer (b0)->ip.reass.l4_src_port, - vnet_buffer (b0)->ip.reass.l4_dst_port, - ip0->protocol, rx_fib_index0, &s0, node, next0, - thread_index, now); + next[0] = + slow_path_ed (sm, b0, ip0->src_address, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_src_port, + vnet_buffer (b0)->ip.reass.l4_dst_port, + ip0->protocol, rx_fib_index0, &s0, node, next[0], + thread_index, now); - if (PREDICT_FALSE (next0 == NAT_NEXT_DROP)) - goto trace0; + if (PREDICT_FALSE (next[0] == NAT_NEXT_DROP)) + goto trace0; - if (PREDICT_FALSE (!s0)) - goto trace0; + if (PREDICT_FALSE (!s0)) + goto trace0; - } + } - b0->flags |= VNET_BUFFER_F_IS_NATED; + b0->flags |= VNET_BUFFER_F_IS_NATED; - if (!is_output_feature) - vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; + if (!is_output_feature) + vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; - old_addr0 = ip0->src_address.as_u32; - new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32; - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - src_address); - 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); - ip0->checksum = ip_csum_fold (sum0); + old_addr0 = ip0->src_address.as_u32; + new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32; + sum0 = ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + src_address); + 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); + ip0->checksum = ip_csum_fold (sum0); - old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port; + old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port; - if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) - { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) - { - 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); - 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, - s0->ext_host_addr.as_u32, - ip4_header_t, dst_address); - sum0 = - ip_csum_update (sum0, - vnet_buffer (b0)->ip. - reass.l4_dst_port, s0->ext_host_port, - ip4_header_t, length); - tcp0->dst_port = s0->ext_host_port; - ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; - } - mss_clamping (sm->mss_clamping, tcp0, &sum0); - tcp0->checksum = ip_csum_fold (sum0); - } - tcp_packets++; - if (nat44_set_tcp_session_state_i2o - (sm, now, s0, b0, thread_index)) - goto trace0; - } - else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment - && udp0->checksum) + if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { new_port0 = udp0->src_port = s0->out2in.port; - sum0 = udp0->checksum; + 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.reass.l4_dst_port, s0->ext_host_port, ip4_header_t, length); - udp0->dst_port = s0->ext_host_port; + tcp0->dst_port = s0->ext_host_port; ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; } - udp0->checksum = ip_csum_fold (sum0); - udp_packets++; + mss_clamping (sm->mss_clamping, tcp0, &sum0); + tcp0->checksum = ip_csum_fold (sum0); } - else + vlib_increment_simple_counter (&sm->counters.slowpath.in2out_ed.tcp, + thread_index, sw_if_index0, 1); + if (nat44_set_tcp_session_state_i2o (sm, now, s0, b0, thread_index)) + 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); + 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, + vnet_buffer (b0)->ip.reass.l4_dst_port, + s0->ext_host_port, ip4_header_t, length); + udp0->dst_port = s0->ext_host_port; + ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; + } + udp0->checksum = ip_csum_fold (sum0); + vlib_increment_simple_counter (&sm->counters.slowpath.in2out_ed.udp, + thread_index, sw_if_index0, 1); + } + else + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) + new_port0 = udp0->src_port = s0->out2in.port; + if (PREDICT_FALSE (is_twice_nat_session (s0))) { - new_port0 = udp0->src_port = s0->out2in.port; - if (PREDICT_FALSE (is_twice_nat_session (s0))) - { - udp0->dst_port = s0->ext_host_port; - ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; - } - udp_packets++; + udp0->dst_port = s0->ext_host_port; + ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; } + vlib_increment_simple_counter (&sm->counters.slowpath. + in2out_ed.udp, thread_index, + sw_if_index0, 1); } + } - /* 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))) - { - nat_in2out_ed_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->is_slow_path = 1; - - if (s0) - t->session_index = s0 - tsm->sessions; - else - t->session_index = ~0; - } + /* 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); - pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next; + 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->sw_if_index = sw_if_index0; + t->next_index = next[0]; + t->is_slow_path = 1; + + if (s0) + t->session_index = s0 - tsm->sessions; + else + t->session_index = ~0; + } - /* 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 (next[0] == NAT_NEXT_DROP) + { + vlib_increment_simple_counter (&sm->counters.slowpath. + in2out_ed.drops, thread_index, + sw_if_index0, 1); } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); + n_left_from--; + next++; + b++; } - 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); + vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, + frame->n_vectors); + return frame->n_vectors; }