2 * Copyright (c) 2018 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
17 * @brief NAT44 endpoint-dependent inside to outside network translation
20 #include <vlib/vlib.h>
21 #include <vnet/vnet.h>
22 #include <vnet/ip/ip.h>
23 #include <vnet/ethernet/ethernet.h>
24 #include <vnet/fib/ip4_fib.h>
25 #include <vnet/udp/udp.h>
26 #include <vppinfra/error.h>
28 #include <nat/nat_ipfix_logging.h>
29 #include <nat/nat_inlines.h>
30 #include <nat/nat44/inlines.h>
31 #include <nat/nat_syslog.h>
32 #include <nat/nat_ha.h>
33 #include <nat/nat44/ed_inlines.h>
34 #include <nat/lib/nat_inlines.h>
36 /* number of attempts to get a port for ED overloading algorithm, if rolling
37 * a dice this many times doesn't produce a free port, it's treated
38 * as if there were no free ports available to conserve resources */
39 #define ED_PORT_ALLOC_ATTEMPTS (10)
41 static char *nat_in2out_ed_error_strings[] = {
42 #define _(sym,string) string,
43 foreach_nat_in2out_ed_error
53 } nat_in2out_ed_trace_t;
56 format_nat_in2out_ed_trace (u8 * s, va_list * args)
58 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
59 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
60 nat_in2out_ed_trace_t *t = va_arg (*args, nat_in2out_ed_trace_t *);
64 t->is_slow_path ? "NAT44_IN2OUT_ED_SLOW_PATH" :
65 "NAT44_IN2OUT_ED_FAST_PATH";
67 s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag,
68 t->sw_if_index, t->next_index, t->session_index);
73 #ifndef CLIB_MARCH_VARIANT
75 nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg)
77 snat_main_t *sm = &snat_main;
78 nat44_is_idle_session_ctx_t *ctx = arg;
80 u64 sess_timeout_time;
83 ip4_address_t *l_addr, *r_addr;
85 clib_bihash_kv_16_8_t ed_kv;
88 snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
91 ASSERT (ctx->thread_index == ed_value_get_thread_index (kv));
92 s = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (kv));
93 sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s);
94 if (ctx->now >= sess_timeout_time)
96 if (is_fwd_bypass_session (s))
99 l_addr = &s->out2in.addr;
100 r_addr = &s->ext_host_addr;
101 fib_index = s->out2in.fib_index;
102 if (snat_is_unk_proto_session (s))
104 proto = s->in2out.port;
110 proto = nat_proto_to_ip_proto (s->nat_proto);
111 l_port = s->out2in.port;
112 r_port = s->ext_host_port;
114 init_ed_k (&ed_kv, *l_addr, l_port, *r_addr, r_port, fib_index, proto);
115 if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &ed_kv, 0))
116 nat_elog_warn ("out2in_ed key del failed");
118 if (snat_is_unk_proto_session (s))
121 snat_ipfix_logging_nat44_ses_delete (ctx->thread_index,
122 s->in2out.addr.as_u32,
123 s->out2in.addr.as_u32,
127 s->in2out.fib_index);
129 nat_syslog_nat44_sdel (s->user_index, s->in2out.fib_index,
130 &s->in2out.addr, s->in2out.port,
131 &s->ext_host_nat_addr, s->ext_host_nat_port,
132 &s->out2in.addr, s->out2in.port,
133 &s->ext_host_addr, s->ext_host_port,
134 s->nat_proto, is_twice_nat_session (s));
136 nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
137 s->ext_host_port, s->nat_proto, s->out2in.fib_index,
140 if (is_twice_nat_session (s))
142 for (i = 0; i < vec_len (sm->twice_nat_addresses); i++)
144 // TODO FIXME this is obviously broken - which address should be
146 a = sm->twice_nat_addresses + i;
147 if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32)
149 snat_free_outside_address_and_port (sm->twice_nat_addresses,
151 &s->ext_host_nat_addr,
152 s->ext_host_nat_port,
159 if (snat_is_session_static (s))
162 snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
163 &s->out2in.addr, s->out2in.port,
166 nat_ed_session_delete (sm, s, ctx->thread_index, 1);
175 icmp_in2out_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0,
176 ip4_header_t * ip0, icmp46_header_t * icmp0,
177 u32 sw_if_index0, u32 rx_fib_index0,
178 vlib_node_runtime_t * node, u32 next0, f64 now,
179 u32 thread_index, snat_session_t ** p_s0)
181 vlib_main_t *vm = vlib_get_main ();
183 next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
184 next0, thread_index, p_s0, 0);
185 snat_session_t *s0 = *p_s0;
186 if (PREDICT_TRUE (next0 != NAT_NEXT_DROP && s0))
189 nat44_session_update_counters (s0, now,
190 vlib_buffer_length_in_chain
191 (vm, b0), thread_index);
192 /* Per-user LRU list maintenance */
193 nat44_session_update_lru (sm, s0, thread_index);
199 nat_ed_alloc_addr_and_port (snat_main_t * sm, u32 rx_fib_index,
200 u32 nat_proto, u32 thread_index,
201 ip4_address_t r_addr, u16 r_port, u8 proto,
202 u16 port_per_thread, u32 snat_thread_index,
204 ip4_address_t * outside_addr,
206 clib_bihash_kv_16_8_t * out2in_ed_kv)
209 snat_address_t *a, *ga = 0;
210 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
212 const u16 port_thread_offset = (port_per_thread * snat_thread_index) + 1024;
214 for (i = 0; i < vec_len (sm->addresses); i++)
216 a = sm->addresses + i;
219 #define _(N, j, n, unused) \
220 case NAT_PROTOCOL_##N: \
221 if (a->fib_index == rx_fib_index) \
223 /* first try port suggested by caller */ \
224 u16 port = clib_net_to_host_u16 (*outside_port); \
225 u16 port_offset = port - port_thread_offset; \
226 if (port <= port_thread_offset || \
227 port > port_thread_offset + port_per_thread) \
229 /* need to pick a different port, suggested port doesn't fit in \
230 * this thread's port range */ \
231 port_offset = snat_random_port (0, port_per_thread - 1); \
232 port = port_thread_offset + port_offset; \
234 u16 attempts = ED_PORT_ALLOC_ATTEMPTS; \
237 init_ed_kv (out2in_ed_kv, a->addr, clib_host_to_net_u16 (port), \
238 r_addr, r_port, s->out2in.fib_index, proto, \
239 thread_index, s - tsm->sessions); \
240 int rv = clib_bihash_add_del_16_8 (&sm->out2in_ed, out2in_ed_kv, \
244 ++a->busy_##n##_port_refcounts[port]; \
245 a->busy_##n##_ports_per_thread[thread_index]++; \
246 a->busy_##n##_ports++; \
247 *outside_addr = a->addr; \
248 *outside_port = clib_host_to_net_u16 (port); \
251 port_offset = snat_random_port (0, port_per_thread - 1); \
252 port = port_thread_offset + port_offset; \
255 while (attempts > 0); \
257 else if (a->fib_index == ~0) \
263 foreach_nat_protocol;
265 nat_elog_info ("unknown protocol");
272 /* fake fib_index to reuse macro */
277 foreach_nat_protocol;
279 nat_elog_info ("unknown protocol");
286 /* Totally out of translations to use... */
287 snat_ipfix_logging_addresses_exhausted (thread_index, 0);
291 static_always_inline u32
292 nat_outside_fib_index_lookup (snat_main_t * sm, ip4_address_t addr)
294 fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
295 nat_outside_fib_t *outside_fib;
297 .fp_proto = FIB_PROTOCOL_IP4,
299 .fp_addr = {.ip4.as_u32 = addr.as_u32,}
302 // TODO: multiple vrfs none can resolve addr
304 vec_foreach (outside_fib, sm->outside_fibs)
306 fei = fib_table_lookup (outside_fib->fib_index, &pfx);
307 if (FIB_NODE_INDEX_INVALID != fei)
309 if (fib_entry_get_resolving_interface (fei) != ~0)
311 return outside_fib->fib_index;
320 slow_path_ed (snat_main_t * sm,
322 ip4_address_t l_addr,
323 ip4_address_t r_addr,
328 snat_session_t ** sessionp,
329 vlib_node_runtime_t * node, u32 next, u32 thread_index, f64 now)
331 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
332 clib_bihash_kv_16_8_t out2in_ed_kv;
333 nat44_is_idle_session_ctx_t ctx;
334 ip4_address_t outside_addr;
338 u32 nat_proto = ip_proto_to_nat_proto (proto);
339 snat_session_t *s = NULL;
340 lb_nat_type_t lb = 0;
342 if (PREDICT_TRUE (nat_proto == NAT_PROTOCOL_TCP))
346 (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
348 b->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
349 return NAT_NEXT_DROP;
354 (nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index)))
356 if (!nat_lru_free_one (sm, thread_index, now))
358 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
359 nat_ipfix_logging_max_sessions (thread_index,
360 sm->max_translations_per_thread);
361 nat_elog_notice ("maximum sessions exceeded");
362 return NAT_NEXT_DROP;
366 ip4_address_t sm_addr;
369 /* First try to match static mapping by local address and port */
370 if (snat_static_mapping_match
371 (sm, l_addr, l_port, rx_fib_index, nat_proto, &sm_addr, &sm_port,
372 &sm_fib_index, 0, 0, 0, &lb, 0, &identity_nat, 0))
374 s = nat_ed_session_alloc (sm, thread_index, now, proto);
376 s->in2out.addr = l_addr;
377 s->in2out.port = l_port;
378 s->nat_proto = nat_proto;
379 s->in2out.fib_index = rx_fib_index;
380 s->out2in.fib_index = sm->outside_fib_index;
382 switch (vec_len (sm->outside_fibs))
385 s->out2in.fib_index = sm->outside_fib_index;
388 s->out2in.fib_index = sm->outside_fibs[0].fib_index;
391 s->out2in.fib_index = nat_outside_fib_index_lookup (sm, r_addr);
395 /* Try to create dynamic translation */
396 outside_port = l_port; // suggest using local port to allocation function
397 if (nat_ed_alloc_addr_and_port (sm, rx_fib_index, nat_proto,
398 thread_index, r_addr, r_port, proto,
400 tsm->snat_thread_index, s,
402 &outside_port, &out2in_ed_kv))
404 nat_elog_notice ("addresses exhausted");
405 b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS];
406 nat_ed_session_delete (sm, s, thread_index, 1);
407 return NAT_NEXT_DROP;
409 s->out2in.addr = outside_addr;
410 s->out2in.port = outside_port;
414 if (PREDICT_FALSE (identity_nat))
419 s = nat_ed_session_alloc (sm, thread_index, now, proto);
421 s->out2in.addr = sm_addr;
422 s->out2in.port = sm_port;
423 s->in2out.addr = l_addr;
424 s->in2out.port = l_port;
425 s->nat_proto = nat_proto;
426 s->in2out.fib_index = rx_fib_index;
427 s->out2in.fib_index = sm->outside_fib_index;
428 switch (vec_len (sm->outside_fibs))
431 s->out2in.fib_index = sm->outside_fib_index;
434 s->out2in.fib_index = sm->outside_fibs[0].fib_index;
437 s->out2in.fib_index = nat_outside_fib_index_lookup (sm, r_addr);
441 s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
443 init_ed_kv (&out2in_ed_kv, sm_addr, sm_port, r_addr, r_port,
444 s->out2in.fib_index, proto, thread_index,
446 if (clib_bihash_add_or_overwrite_stale_16_8
447 (&sm->out2in_ed, &out2in_ed_kv, nat44_o2i_ed_is_idle_session_cb,
449 nat_elog_notice ("out2in-ed key add failed");
453 s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING;
454 s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
455 s->ext_host_addr = r_addr;
456 s->ext_host_port = r_port;
458 clib_bihash_kv_16_8_t in2out_ed_kv;
459 init_ed_kv (&in2out_ed_kv, l_addr, l_port, r_addr, r_port, rx_fib_index,
460 proto, thread_index, s - tsm->sessions);
462 ctx.thread_index = thread_index;
463 if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, &in2out_ed_kv,
464 nat44_i2o_ed_is_idle_session_cb,
466 nat_elog_notice ("in2out-ed key add failed");
471 snat_ipfix_logging_nat44_ses_create (thread_index,
472 s->in2out.addr.as_u32,
473 s->out2in.addr.as_u32,
476 s->out2in.port, s->in2out.fib_index);
478 nat_syslog_nat44_sadd (s->user_index, s->in2out.fib_index,
479 &s->in2out.addr, s->in2out.port,
480 &s->ext_host_nat_addr, s->ext_host_nat_port,
481 &s->out2in.addr, s->out2in.port,
482 &s->ext_host_addr, s->ext_host_port, s->nat_proto,
485 nat_ha_sadd (&s->in2out.addr, s->in2out.port, &s->out2in.addr,
486 s->out2in.port, &s->ext_host_addr, s->ext_host_port,
487 &s->ext_host_nat_addr, s->ext_host_nat_port,
488 s->nat_proto, s->in2out.fib_index, s->flags, thread_index, 0);
490 per_vrf_sessions_register_session (s, thread_index);
495 static_always_inline int
496 nat44_ed_not_translate (snat_main_t * sm, vlib_node_runtime_t * node,
497 u32 sw_if_index, ip4_header_t * ip, u32 proto,
498 u32 rx_fib_index, u32 thread_index)
500 udp_header_t *udp = ip4_next_header (ip);
501 clib_bihash_kv_16_8_t kv, value;
503 init_ed_k (&kv, ip->dst_address, udp->dst_port, ip->src_address,
504 udp->src_port, sm->outside_fib_index, ip->protocol);
506 /* NAT packet aimed at external address if has active sessions */
507 if (clib_bihash_search_16_8 (&sm->out2in_ed, &kv, &value))
509 /* or is static mappings */
510 ip4_address_t placeholder_addr;
511 u16 placeholder_port;
512 u32 placeholder_fib_index;
513 if (!snat_static_mapping_match
514 (sm, ip->dst_address, udp->dst_port, sm->outside_fib_index, proto,
515 &placeholder_addr, &placeholder_port, &placeholder_fib_index, 1, 0,
522 if (sm->forwarding_enabled)
525 return snat_not_translate_fast (sm, node, sw_if_index, ip, proto,
529 static_always_inline int
530 nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip,
531 u32 thread_index, f64 now,
532 vlib_main_t * vm, vlib_buffer_t * b)
534 clib_bihash_kv_16_8_t kv, value;
535 snat_session_t *s = 0;
536 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
538 if (!sm->forwarding_enabled)
541 if (ip->protocol == IP_PROTOCOL_ICMP)
543 if (get_icmp_i2o_ed_key (b, ip, 0, ~0, ~0, 0, 0, 0, &kv))
546 else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
548 init_ed_k (&kv, ip->src_address, vnet_buffer (b)->ip.reass.l4_src_port,
549 ip->dst_address, vnet_buffer (b)->ip.reass.l4_dst_port, 0,
554 init_ed_k (&kv, ip->src_address, 0, ip->dst_address, 0, 0,
558 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
560 ASSERT (thread_index == ed_value_get_thread_index (&value));
562 pool_elt_at_index (tsm->sessions,
563 ed_value_get_session_index (&value));
564 if (is_fwd_bypass_session (s))
566 if (ip->protocol == IP_PROTOCOL_TCP)
568 if (nat44_set_tcp_session_state_i2o
569 (sm, now, s, b, thread_index))
573 nat44_session_update_counters (s, now,
574 vlib_buffer_length_in_chain (vm, b),
576 /* Per-user LRU list maintenance */
577 nat44_session_update_lru (sm, s, thread_index);
587 static_always_inline int
588 nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip,
589 u16 src_port, u16 dst_port,
590 u32 thread_index, u32 rx_sw_if_index,
593 clib_bihash_kv_16_8_t kv, value;
594 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
597 u32 rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (rx_sw_if_index);
598 u32 tx_fib_index = ip4_fib_table_get_index_for_sw_if_index (tx_sw_if_index);
601 init_ed_k (&kv, ip->src_address, src_port, ip->dst_address, dst_port,
602 tx_fib_index, ip->protocol);
603 if (!clib_bihash_search_16_8 (&sm->out2in_ed, &kv, &value))
605 ASSERT (thread_index == ed_value_get_thread_index (&value));
607 pool_elt_at_index (tsm->sessions,
608 ed_value_get_session_index (&value));
609 if (nat44_is_ses_closed (s))
611 nat_free_session_data (sm, s, thread_index, 0);
612 nat_ed_session_delete (sm, s, thread_index, 1);
615 s->flags |= SNAT_SESSION_FLAG_OUTPUT_FEATURE;
620 init_ed_k (&kv, ip->dst_address, dst_port, ip->src_address, src_port,
621 rx_fib_index, ip->protocol);
622 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
624 ASSERT (thread_index == ed_value_get_thread_index (&value));
626 pool_elt_at_index (tsm->sessions,
627 ed_value_get_session_index (&value));
628 if (is_fwd_bypass_session (s))
633 pool_foreach (i, sm->output_feature_interfaces,
635 if ((nat_interface_is_inside (i)) && (rx_sw_if_index == i->sw_if_index))
645 #ifndef CLIB_MARCH_VARIANT
647 icmp_match_in2out_ed (snat_main_t * sm, vlib_node_runtime_t * node,
648 u32 thread_index, vlib_buffer_t * b,
649 ip4_header_t * ip, ip4_address_t * addr,
650 u16 * port, u32 * fib_index, nat_protocol_t * proto,
651 void *d, void *e, u8 * dont_translate)
655 clib_bihash_kv_16_8_t kv, value;
658 snat_session_t *s = NULL;
659 u16 l_port = 0, r_port = 0; // initialize to workaround gcc warning
660 vlib_main_t *vm = vlib_get_main ();
661 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
664 sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
665 rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
668 get_icmp_i2o_ed_key (b, ip, rx_fib_index, ~0, ~0, proto, &l_port,
672 b->error = node->errors[err];
673 next = NAT_NEXT_DROP;
677 if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
679 if (vnet_buffer (b)->sw_if_index[VLIB_TX] != ~0)
682 (nat44_ed_not_translate_output_feature
683 (sm, ip, l_port, r_port, thread_index,
684 sw_if_index, vnet_buffer (b)->sw_if_index[VLIB_TX])))
692 if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, sw_if_index,
693 ip, NAT_PROTOCOL_ICMP,
703 (icmp_type_is_error_message
704 (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
706 b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
707 next = NAT_NEXT_DROP;
712 slow_path_ed (sm, b, ip->src_address, ip->dst_address, l_port, r_port,
713 ip->protocol, rx_fib_index, &s, node, next,
714 thread_index, vlib_time_now (vm));
716 if (PREDICT_FALSE (next == NAT_NEXT_DROP))
728 (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
730 && vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
732 && !icmp_type_is_error_message (vnet_buffer (b)->ip.
733 reass.icmp_type_or_tcp_flags)))
735 b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
736 next = NAT_NEXT_DROP;
740 ASSERT (thread_index == ed_value_get_thread_index (&value));
742 pool_elt_at_index (tsm->sessions,
743 ed_value_get_session_index (&value));
748 *addr = s->out2in.addr;
749 *port = s->out2in.port;
750 *fib_index = s->out2in.fib_index;
754 *(snat_session_t **) d = s;
760 static snat_session_t *
761 nat44_ed_in2out_unknown_proto (snat_main_t * sm,
767 vlib_main_t * vm, vlib_node_runtime_t * node)
769 clib_bihash_kv_8_8_t kv, value;
770 clib_bihash_kv_16_8_t s_kv, s_value;
771 snat_static_mapping_t *m;
772 u32 old_addr, new_addr = 0;
774 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
776 u32 outside_fib_index = sm->outside_fib_index;
780 switch (vec_len (sm->outside_fibs))
783 outside_fib_index = sm->outside_fib_index;
786 outside_fib_index = sm->outside_fibs[0].fib_index;
789 outside_fib_index = nat_outside_fib_index_lookup (sm, ip->dst_address);
792 old_addr = ip->src_address.as_u32;
794 init_ed_k (&s_kv, ip->src_address, 0, ip->dst_address, 0, rx_fib_index,
797 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &s_kv, &s_value))
799 ASSERT (thread_index == ed_value_get_thread_index (&s_value));
801 pool_elt_at_index (tsm->sessions,
802 ed_value_get_session_index (&s_value));
803 new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
808 (nat44_ed_maximum_sessions_exceeded
809 (sm, rx_fib_index, thread_index)))
811 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
812 nat_ipfix_logging_max_sessions (thread_index,
813 sm->max_translations_per_thread);
814 nat_elog_notice ("maximum sessions exceeded");
818 init_nat_k (&kv, ip->src_address, 0, rx_fib_index, 0);
820 /* Try to find static mapping first */
821 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value))
823 m = pool_elt_at_index (sm->static_mappings, value.value);
824 new_addr = ip->src_address.as_u32 = m->external_addr.as_u32;
831 pool_foreach (s, tsm->sessions, {
832 if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32)
834 new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
836 init_ed_k(&s_kv, s->out2in.addr, 0, ip->dst_address, 0, outside_fib_index, ip->protocol);
837 if (clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value))
845 for (i = 0; i < vec_len (sm->addresses); i++)
847 init_ed_k (&s_kv, sm->addresses[i].addr, 0, ip->dst_address, 0,
848 outside_fib_index, ip->protocol);
849 if (clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value))
851 new_addr = ip->src_address.as_u32 =
852 sm->addresses[i].addr.as_u32;
860 s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol);
863 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
864 nat_elog_warn ("create NAT session failed");
868 s->ext_host_addr.as_u32 = ip->dst_address.as_u32;
869 s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
870 s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
871 s->out2in.addr.as_u32 = new_addr;
872 s->out2in.fib_index = outside_fib_index;
873 s->in2out.addr.as_u32 = old_addr;
874 s->in2out.fib_index = rx_fib_index;
875 s->in2out.port = s->out2in.port = ip->protocol;
877 s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
879 /* Add to lookup tables */
880 init_ed_kv (&s_kv, s->in2out.addr, 0, ip->dst_address, 0, rx_fib_index,
881 ip->protocol, thread_index, s - tsm->sessions);
882 if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1))
883 nat_elog_notice ("in2out key add failed");
885 init_ed_kv (&s_kv, s->out2in.addr, 0, ip->dst_address, 0,
886 outside_fib_index, ip->protocol, thread_index,
888 if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &s_kv, 1))
889 nat_elog_notice ("out2in key add failed");
891 per_vrf_sessions_register_session (s, thread_index);
894 /* Update IP checksum */
896 sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address);
897 ip->checksum = ip_csum_fold (sum);
900 nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b),
902 /* Per-user LRU list maintenance */
903 nat44_session_update_lru (sm, s, thread_index);
906 if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
907 nat44_ed_hairpinning_unknown_proto (sm, b, ip);
909 if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
910 vnet_buffer (b)->sw_if_index[VLIB_TX] = outside_fib_index;
916 nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm,
917 vlib_node_runtime_t * node,
918 vlib_frame_t * frame,
919 int is_output_feature)
921 u32 n_left_from, *from;
922 snat_main_t *sm = &snat_main;
923 f64 now = vlib_time_now (vm);
924 u32 thread_index = vm->thread_index;
925 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
926 u32 def_slow = is_output_feature ? NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH
927 : NAT_NEXT_IN2OUT_ED_SLOW_PATH;
929 from = vlib_frame_vector_args (frame);
930 n_left_from = frame->n_vectors;
932 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
933 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
934 vlib_get_buffers (vm, from, b, n_left_from);
936 while (n_left_from > 0)
939 u32 sw_if_index0, rx_fib_index0, proto0, new_addr0, old_addr0,
941 u16 old_port0, new_port0;
945 snat_session_t *s0 = 0;
946 clib_bihash_kv_16_8_t kv0, value0;
952 /* Prefetch next iteration. */
953 if (PREDICT_TRUE (n_left_from >= 2))
959 vlib_prefetch_buffer_header (p2, LOAD);
961 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
964 if (is_output_feature)
966 iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
969 next[0] = vnet_buffer2 (b0)->nat.arc_next;
972 (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + iph_offset0);
974 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
976 fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0);
978 if (PREDICT_FALSE (ip0->ttl == 1))
980 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
981 icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
982 ICMP4_time_exceeded_ttl_exceeded_in_transit,
984 next[0] = NAT_NEXT_ICMP_ERROR;
988 udp0 = ip4_next_header (ip0);
989 tcp0 = (tcp_header_t *) udp0;
990 proto0 = ip_proto_to_nat_proto (ip0->protocol);
992 if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
998 if (is_output_feature)
1001 (nat_not_translate_output_feature_fwd
1002 (sm, ip0, thread_index, now, vm, b0)))
1006 if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
1012 init_ed_k (&kv0, ip0->src_address,
1013 vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address,
1014 vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
1017 // lookup for session
1018 if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
1020 // session does not exist go slow path
1024 ASSERT (thread_index == ed_value_get_thread_index (&value0));
1026 pool_elt_at_index (tsm->sessions,
1027 ed_value_get_session_index (&value0));
1029 if (PREDICT_FALSE (per_vrf_sessions_is_expired (s0, thread_index)))
1031 // session is closed, go slow path
1032 nat_free_session_data (sm, s0, thread_index, 0);
1033 nat_ed_session_delete (sm, s0, thread_index, 1);
1034 next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
1038 if (s0->tcp_closed_timestamp)
1040 if (now >= s0->tcp_closed_timestamp)
1042 // session is closed, go slow path, freed in slow path
1047 // session in transitory timeout, drop
1048 b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TCP_CLOSED];
1049 next[0] = NAT_NEXT_DROP;
1054 // drop if session expired
1055 u64 sess_timeout_time;
1057 s0->last_heard + (f64) nat44_session_get_timeout (sm, s0);
1058 if (now >= sess_timeout_time)
1060 nat_free_session_data (sm, s0, thread_index, 0);
1061 nat_ed_session_delete (sm, s0, thread_index, 1);
1062 // session is closed, go slow path
1067 b0->flags |= VNET_BUFFER_F_IS_NATED;
1069 if (!is_output_feature)
1070 vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
1072 old_addr0 = ip0->src_address.as_u32;
1073 new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
1074 sum0 = ip0->checksum;
1076 ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1078 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1080 ip_csum_update (sum0, ip0->dst_address.as_u32,
1081 s0->ext_host_addr.as_u32, ip4_header_t,
1083 ip0->checksum = ip_csum_fold (sum0);
1085 old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
1087 if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
1089 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1091 new_port0 = udp0->src_port = s0->out2in.port;
1092 sum0 = tcp0->checksum;
1094 ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1097 ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
1099 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1102 ip_csum_update (sum0, ip0->dst_address.as_u32,
1103 s0->ext_host_addr.as_u32, ip4_header_t,
1106 ip_csum_update (sum0,
1107 vnet_buffer (b0)->ip.reass.l4_dst_port,
1108 s0->ext_host_port, ip4_header_t, length);
1109 tcp0->dst_port = s0->ext_host_port;
1110 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1112 mss_clamping (sm->mss_clamping, tcp0, &sum0);
1113 tcp0->checksum = ip_csum_fold (sum0);
1115 vlib_increment_simple_counter (&sm->counters.fastpath.in2out_ed.tcp,
1116 thread_index, sw_if_index0, 1);
1117 if (nat44_set_tcp_session_state_i2o (sm, now, s0, b0, thread_index))
1120 else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
1123 new_port0 = udp0->src_port = s0->out2in.port;
1124 sum0 = udp0->checksum;
1126 ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1129 ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, length);
1130 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1133 ip_csum_update (sum0, ip0->dst_address.as_u32,
1134 s0->ext_host_addr.as_u32, ip4_header_t,
1137 ip_csum_update (sum0, vnet_buffer (b0)->ip.reass.l4_dst_port,
1138 s0->ext_host_port, ip4_header_t, length);
1139 udp0->dst_port = s0->ext_host_port;
1140 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1142 udp0->checksum = ip_csum_fold (sum0);
1143 vlib_increment_simple_counter (&sm->counters.fastpath.in2out_ed.udp,
1144 thread_index, sw_if_index0, 1);
1148 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1150 new_port0 = udp0->src_port = s0->out2in.port;
1151 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1153 udp0->dst_port = s0->ext_host_port;
1154 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1156 vlib_increment_simple_counter (&sm->counters.fastpath.
1157 in2out_ed.udp, thread_index,
1163 nat44_session_update_counters (s0, now,
1164 vlib_buffer_length_in_chain (vm, b0),
1166 /* Per-user LRU list maintenance */
1167 nat44_session_update_lru (sm, s0, thread_index);
1171 ((node->flags & VLIB_NODE_FLAG_TRACE)
1172 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
1174 nat_in2out_ed_trace_t *t =
1175 vlib_add_trace (vm, node, b0, sizeof (*t));
1176 t->sw_if_index = sw_if_index0;
1177 t->next_index = next[0];
1178 t->is_slow_path = 0;
1181 t->session_index = s0 - tsm->sessions;
1183 t->session_index = ~0;
1186 if (next[0] == NAT_NEXT_DROP)
1188 vlib_increment_simple_counter (&sm->counters.fastpath.
1189 in2out_ed.drops, thread_index,
1197 vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
1199 return frame->n_vectors;
1203 nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm,
1204 vlib_node_runtime_t * node,
1205 vlib_frame_t * frame,
1206 int is_output_feature)
1208 u32 n_left_from, *from;
1209 snat_main_t *sm = &snat_main;
1210 f64 now = vlib_time_now (vm);
1211 u32 thread_index = vm->thread_index;
1212 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
1214 from = vlib_frame_vector_args (frame);
1215 n_left_from = frame->n_vectors;
1217 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1218 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
1219 vlib_get_buffers (vm, from, b, n_left_from);
1221 while (n_left_from > 0)
1224 u32 sw_if_index0, rx_fib_index0, proto0, new_addr0, old_addr0,
1226 u16 old_port0, new_port0;
1230 icmp46_header_t *icmp0;
1231 snat_session_t *s0 = 0;
1232 clib_bihash_kv_16_8_t kv0, value0;
1237 if (is_output_feature)
1238 iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
1240 next[0] = vnet_buffer2 (b0)->nat.arc_next;
1242 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
1245 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1247 fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0);
1249 if (PREDICT_FALSE (ip0->ttl == 1))
1251 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1252 icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
1253 ICMP4_time_exceeded_ttl_exceeded_in_transit,
1255 next[0] = NAT_NEXT_ICMP_ERROR;
1259 udp0 = ip4_next_header (ip0);
1260 tcp0 = (tcp_header_t *) udp0;
1261 icmp0 = (icmp46_header_t *) udp0;
1262 proto0 = ip_proto_to_nat_proto (ip0->protocol);
1264 if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
1266 s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0,
1268 thread_index, now, vm, node);
1270 next[0] = NAT_NEXT_DROP;
1272 vlib_increment_simple_counter (&sm->counters.slowpath.
1273 in2out_ed.other, thread_index,
1278 if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
1281 icmp_in2out_ed_slow_path (sm, b0, ip0, icmp0, sw_if_index0,
1282 rx_fib_index0, node, next[0], now,
1284 vlib_increment_simple_counter (&sm->counters.slowpath.
1285 in2out_ed.icmp, thread_index,
1290 init_ed_k (&kv0, ip0->src_address,
1291 vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address,
1292 vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
1294 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
1296 ASSERT (thread_index == ed_value_get_thread_index (&value0));
1298 pool_elt_at_index (tsm->sessions,
1299 ed_value_get_session_index (&value0));
1301 if (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp)
1303 nat_free_session_data (sm, s0, thread_index, 0);
1304 nat_ed_session_delete (sm, s0, thread_index, 1);
1311 if (is_output_feature)
1314 (nat44_ed_not_translate_output_feature
1315 (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port,
1316 vnet_buffer (b0)->ip.reass.l4_dst_port, thread_index,
1317 sw_if_index0, vnet_buffer (b0)->sw_if_index[VLIB_TX])))
1321 * Send DHCP packets to the ipv4 stack, or we won't
1322 * be able to use dhcp client on the outside interface
1325 (proto0 == NAT_PROTOCOL_UDP
1326 && (vnet_buffer (b0)->ip.reass.l4_dst_port ==
1327 clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_server))
1328 && ip0->dst_address.as_u32 == 0xffffffff))
1334 (nat44_ed_not_translate
1335 (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0,
1341 slow_path_ed (sm, b0, ip0->src_address, ip0->dst_address,
1342 vnet_buffer (b0)->ip.reass.l4_src_port,
1343 vnet_buffer (b0)->ip.reass.l4_dst_port,
1344 ip0->protocol, rx_fib_index0, &s0, node, next[0],
1347 if (PREDICT_FALSE (next[0] == NAT_NEXT_DROP))
1350 if (PREDICT_FALSE (!s0))
1355 b0->flags |= VNET_BUFFER_F_IS_NATED;
1357 if (!is_output_feature)
1358 vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
1360 old_addr0 = ip0->src_address.as_u32;
1361 new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
1362 sum0 = ip0->checksum;
1363 sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1365 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1366 sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
1367 s0->ext_host_addr.as_u32, ip4_header_t,
1369 ip0->checksum = ip_csum_fold (sum0);
1371 old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
1373 if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
1375 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1377 new_port0 = udp0->src_port = s0->out2in.port;
1378 sum0 = tcp0->checksum;
1380 ip_csum_update (sum0, old_addr0, new_addr0,
1381 ip4_header_t, dst_address);
1383 ip_csum_update (sum0, old_port0, new_port0,
1384 ip4_header_t, length);
1385 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1388 ip_csum_update (sum0, ip0->dst_address.as_u32,
1389 s0->ext_host_addr.as_u32,
1390 ip4_header_t, dst_address);
1392 ip_csum_update (sum0,
1393 vnet_buffer (b0)->ip.reass.l4_dst_port,
1394 s0->ext_host_port, ip4_header_t, length);
1395 tcp0->dst_port = s0->ext_host_port;
1396 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1398 mss_clamping (sm->mss_clamping, tcp0, &sum0);
1399 tcp0->checksum = ip_csum_fold (sum0);
1401 vlib_increment_simple_counter (&sm->counters.slowpath.in2out_ed.tcp,
1402 thread_index, sw_if_index0, 1);
1403 if (nat44_set_tcp_session_state_i2o (sm, now, s0, b0, thread_index))
1406 else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
1409 new_port0 = udp0->src_port = s0->out2in.port;
1410 sum0 = udp0->checksum;
1412 ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1415 ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, length);
1416 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1418 sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
1419 s0->ext_host_addr.as_u32,
1420 ip4_header_t, dst_address);
1422 ip_csum_update (sum0,
1423 vnet_buffer (b0)->ip.reass.l4_dst_port,
1424 s0->ext_host_port, ip4_header_t, length);
1425 udp0->dst_port = s0->ext_host_port;
1426 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1428 udp0->checksum = ip_csum_fold (sum0);
1429 vlib_increment_simple_counter (&sm->counters.slowpath.in2out_ed.udp,
1430 thread_index, sw_if_index0, 1);
1434 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1436 new_port0 = udp0->src_port = s0->out2in.port;
1437 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1439 udp0->dst_port = s0->ext_host_port;
1440 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1442 vlib_increment_simple_counter (&sm->counters.slowpath.
1443 in2out_ed.udp, thread_index,
1449 nat44_session_update_counters (s0, now,
1450 vlib_buffer_length_in_chain
1451 (vm, b0), thread_index);
1452 /* Per-user LRU list maintenance */
1453 nat44_session_update_lru (sm, s0, thread_index);
1456 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
1457 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
1459 nat_in2out_ed_trace_t *t =
1460 vlib_add_trace (vm, node, b0, sizeof (*t));
1461 t->sw_if_index = sw_if_index0;
1462 t->next_index = next[0];
1463 t->is_slow_path = 1;
1466 t->session_index = s0 - tsm->sessions;
1468 t->session_index = ~0;
1471 if (next[0] == NAT_NEXT_DROP)
1473 vlib_increment_simple_counter (&sm->counters.slowpath.
1474 in2out_ed.drops, thread_index,
1483 vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
1486 return frame->n_vectors;
1489 VLIB_NODE_FN (nat44_ed_in2out_node) (vlib_main_t * vm,
1490 vlib_node_runtime_t * node,
1491 vlib_frame_t * frame)
1493 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 0);
1497 VLIB_REGISTER_NODE (nat44_ed_in2out_node) = {
1498 .name = "nat44-ed-in2out",
1499 .vector_size = sizeof (u32),
1500 .sibling_of = "nat-default",
1501 .format_trace = format_nat_in2out_ed_trace,
1502 .type = VLIB_NODE_TYPE_INTERNAL,
1503 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1504 .error_strings = nat_in2out_ed_error_strings,
1505 .runtime_data_bytes = sizeof (snat_runtime_t),
1509 VLIB_NODE_FN (nat44_ed_in2out_output_node) (vlib_main_t * vm,
1510 vlib_node_runtime_t * node,
1511 vlib_frame_t * frame)
1513 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 1);
1517 VLIB_REGISTER_NODE (nat44_ed_in2out_output_node) = {
1518 .name = "nat44-ed-in2out-output",
1519 .vector_size = sizeof (u32),
1520 .sibling_of = "nat-default",
1521 .format_trace = format_nat_in2out_ed_trace,
1522 .type = VLIB_NODE_TYPE_INTERNAL,
1523 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1524 .error_strings = nat_in2out_ed_error_strings,
1525 .runtime_data_bytes = sizeof (snat_runtime_t),
1529 VLIB_NODE_FN (nat44_ed_in2out_slowpath_node) (vlib_main_t * vm,
1530 vlib_node_runtime_t *
1531 node, vlib_frame_t * frame)
1533 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 0);
1537 VLIB_REGISTER_NODE (nat44_ed_in2out_slowpath_node) = {
1538 .name = "nat44-ed-in2out-slowpath",
1539 .vector_size = sizeof (u32),
1540 .sibling_of = "nat-default",
1541 .format_trace = format_nat_in2out_ed_trace,
1542 .type = VLIB_NODE_TYPE_INTERNAL,
1543 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1544 .error_strings = nat_in2out_ed_error_strings,
1545 .runtime_data_bytes = sizeof (snat_runtime_t),
1549 VLIB_NODE_FN (nat44_ed_in2out_output_slowpath_node) (vlib_main_t * vm,
1552 vlib_frame_t * frame)
1554 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 1);
1558 VLIB_REGISTER_NODE (nat44_ed_in2out_output_slowpath_node) = {
1559 .name = "nat44-ed-in2out-output-slowpath",
1560 .vector_size = sizeof (u32),
1561 .sibling_of = "nat-default",
1562 .format_trace = format_nat_in2out_ed_trace,
1563 .type = VLIB_NODE_TYPE_INTERNAL,
1564 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1565 .error_strings = nat_in2out_ed_error_strings,
1566 .runtime_data_bytes = sizeof (snat_runtime_t),
1571 format_nat_pre_trace (u8 * s, va_list * args)
1573 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1574 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1575 nat_pre_trace_t *t = va_arg (*args, nat_pre_trace_t *);
1576 return format (s, "in2out next_index %d arc_next_index %d", t->next_index,
1580 VLIB_NODE_FN (nat_pre_in2out_node)
1581 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1583 return nat_pre_node_fn_inline (vm, node, frame,
1584 NAT_NEXT_IN2OUT_ED_FAST_PATH);
1587 VLIB_NODE_FN (nat_pre_in2out_output_node)
1588 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1590 return nat_pre_node_fn_inline (vm, node, frame,
1591 NAT_NEXT_IN2OUT_ED_OUTPUT_FAST_PATH);
1595 VLIB_REGISTER_NODE (nat_pre_in2out_node) = {
1596 .name = "nat-pre-in2out",
1597 .vector_size = sizeof (u32),
1598 .sibling_of = "nat-default",
1599 .format_trace = format_nat_pre_trace,
1600 .type = VLIB_NODE_TYPE_INTERNAL,
1604 VLIB_REGISTER_NODE (nat_pre_in2out_output_node) = {
1605 .name = "nat-pre-in2out-output",
1606 .vector_size = sizeof (u32),
1607 .sibling_of = "nat-default",
1608 .format_trace = format_nat_pre_trace,
1609 .type = VLIB_NODE_TYPE_INTERNAL,
1615 * fd.io coding-style-patch-verification: ON
1618 * eval: (c-set-style "gnu")