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_local.h>
26 #include <vppinfra/error.h>
28 #include <nat/lib/ipfix_logging.h>
29 #include <nat/nat_inlines.h>
30 #include <nat/nat44/inlines.h>
31 #include <nat/lib/nat_syslog.h>
32 #include <nat/nat44/ed_inlines.h>
33 #include <nat/lib/nat_inlines.h>
35 /* number of attempts to get a port for ED overloading algorithm, if rolling
36 * a dice this many times doesn't produce a free port, it's treated
37 * as if there were no free ports available to conserve resources */
38 #define ED_PORT_ALLOC_ATTEMPTS (10)
40 static char *nat_in2out_ed_error_strings[] = {
41 #define _(sym,string) string,
42 foreach_nat_in2out_ed_error
52 } nat_in2out_ed_trace_t;
55 format_nat_in2out_ed_trace (u8 * s, va_list * args)
57 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
58 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
59 nat_in2out_ed_trace_t *t = va_arg (*args, nat_in2out_ed_trace_t *);
63 t->is_slow_path ? "NAT44_IN2OUT_ED_SLOW_PATH" :
64 "NAT44_IN2OUT_ED_FAST_PATH";
66 s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag,
67 t->sw_if_index, t->next_index, t->session_index);
72 #ifndef CLIB_MARCH_VARIANT
74 nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg)
76 snat_main_t *sm = &snat_main;
77 nat44_is_idle_session_ctx_t *ctx = arg;
79 u64 sess_timeout_time;
82 ip4_address_t *l_addr, *r_addr;
84 clib_bihash_kv_16_8_t ed_kv;
87 snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
90 ASSERT (ctx->thread_index == ed_value_get_thread_index (kv));
91 s = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (kv));
92 sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s);
93 if (ctx->now >= sess_timeout_time)
95 if (is_fwd_bypass_session (s))
98 l_addr = &s->out2in.addr;
99 r_addr = &s->ext_host_addr;
100 fib_index = s->out2in.fib_index;
101 if (snat_is_unk_proto_session (s))
103 proto = s->in2out.port;
109 proto = nat_proto_to_ip_proto (s->nat_proto);
110 l_port = s->out2in.port;
111 r_port = s->ext_host_port;
113 init_ed_k (&ed_kv, *l_addr, l_port, *r_addr, r_port, fib_index, proto);
114 if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &ed_kv, 0))
115 nat_elog_warn ("out2in_ed key del failed");
117 if (snat_is_unk_proto_session (s))
120 nat_ipfix_logging_nat44_ses_delete (ctx->thread_index,
121 s->in2out.addr.as_u32,
122 s->out2in.addr.as_u32,
126 s->in2out.fib_index);
128 nat_syslog_nat44_sdel (s->user_index, s->in2out.fib_index,
129 &s->in2out.addr, s->in2out.port,
130 &s->ext_host_nat_addr, s->ext_host_nat_port,
131 &s->out2in.addr, s->out2in.port,
132 &s->ext_host_addr, s->ext_host_port,
133 s->nat_proto, is_twice_nat_session (s));
135 if (is_twice_nat_session (s))
137 for (i = 0; i < vec_len (sm->twice_nat_addresses); i++)
139 // TODO FIXME this is obviously broken - which address should be
141 a = sm->twice_nat_addresses + i;
142 if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32)
144 snat_free_outside_address_and_port (sm->twice_nat_addresses,
146 &s->ext_host_nat_addr,
147 s->ext_host_nat_port,
154 if (snat_is_session_static (s))
157 snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
158 &s->out2in.addr, s->out2in.port,
161 nat_ed_session_delete (sm, s, ctx->thread_index, 1);
170 icmp_in2out_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0,
171 ip4_header_t * ip0, icmp46_header_t * icmp0,
172 u32 sw_if_index0, u32 rx_fib_index0,
173 vlib_node_runtime_t * node, u32 next0, f64 now,
174 u32 thread_index, snat_session_t ** p_s0)
176 vlib_main_t *vm = vlib_get_main ();
178 next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
179 next0, thread_index, p_s0, 0);
180 snat_session_t *s0 = *p_s0;
181 if (PREDICT_TRUE (next0 != NAT_NEXT_DROP && s0))
184 nat44_session_update_counters (s0, now,
185 vlib_buffer_length_in_chain
186 (vm, b0), thread_index);
187 /* Per-user LRU list maintenance */
188 nat44_session_update_lru (sm, s0, thread_index);
194 nat_ed_alloc_addr_and_port (snat_main_t * sm, u32 rx_fib_index,
195 u32 nat_proto, u32 thread_index,
196 ip4_address_t r_addr, u16 r_port, u8 proto,
197 u16 port_per_thread, u32 snat_thread_index,
199 ip4_address_t * outside_addr,
201 clib_bihash_kv_16_8_t * out2in_ed_kv)
204 snat_address_t *a, *ga = 0;
205 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
207 const u16 port_thread_offset = (port_per_thread * snat_thread_index) + 1024;
209 for (i = 0; i < vec_len (sm->addresses); i++)
211 a = sm->addresses + i;
214 #define _(N, j, n, unused) \
215 case NAT_PROTOCOL_##N: \
216 if (a->fib_index == rx_fib_index) \
218 /* first try port suggested by caller */ \
219 u16 port = clib_net_to_host_u16 (*outside_port); \
220 u16 port_offset = port - port_thread_offset; \
221 if (port <= port_thread_offset || \
222 port > port_thread_offset + port_per_thread) \
224 /* need to pick a different port, suggested port doesn't fit in \
225 * this thread's port range */ \
226 port_offset = snat_random_port (0, port_per_thread - 1); \
227 port = port_thread_offset + port_offset; \
229 u16 attempts = ED_PORT_ALLOC_ATTEMPTS; \
232 init_ed_kv (out2in_ed_kv, a->addr, clib_host_to_net_u16 (port), \
233 r_addr, r_port, s->out2in.fib_index, proto, \
234 thread_index, s - tsm->sessions); \
235 int rv = clib_bihash_add_del_16_8 (&sm->out2in_ed, out2in_ed_kv, \
239 ++a->busy_##n##_port_refcounts[port]; \
240 a->busy_##n##_ports_per_thread[thread_index]++; \
241 a->busy_##n##_ports++; \
242 *outside_addr = a->addr; \
243 *outside_port = clib_host_to_net_u16 (port); \
246 port_offset = snat_random_port (0, port_per_thread - 1); \
247 port = port_thread_offset + port_offset; \
250 while (attempts > 0); \
252 else if (a->fib_index == ~0) \
258 foreach_nat_protocol;
260 nat_elog_info ("unknown protocol");
267 /* fake fib_index to reuse macro */
272 foreach_nat_protocol;
274 nat_elog_info ("unknown protocol");
281 /* Totally out of translations to use... */
282 nat_ipfix_logging_addresses_exhausted (thread_index, 0);
286 static_always_inline u32
287 nat_outside_fib_index_lookup (snat_main_t * sm, ip4_address_t addr)
289 fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
290 nat_outside_fib_t *outside_fib;
292 .fp_proto = FIB_PROTOCOL_IP4,
294 .fp_addr = {.ip4.as_u32 = addr.as_u32,}
297 // TODO: multiple vrfs none can resolve addr
299 vec_foreach (outside_fib, sm->outside_fibs)
301 fei = fib_table_lookup (outside_fib->fib_index, &pfx);
302 if (FIB_NODE_INDEX_INVALID != fei)
304 if (fib_entry_get_resolving_interface (fei) != ~0)
306 return outside_fib->fib_index;
315 slow_path_ed (snat_main_t * sm,
317 ip4_address_t l_addr,
318 ip4_address_t r_addr,
323 snat_session_t ** sessionp,
324 vlib_node_runtime_t * node, u32 next, u32 thread_index, f64 now)
326 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
327 clib_bihash_kv_16_8_t out2in_ed_kv;
328 nat44_is_idle_session_ctx_t ctx;
329 ip4_address_t outside_addr;
333 u32 nat_proto = ip_proto_to_nat_proto (proto);
334 snat_session_t *s = NULL;
335 lb_nat_type_t lb = 0;
337 if (PREDICT_TRUE (nat_proto == NAT_PROTOCOL_TCP))
341 (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
343 b->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
344 return NAT_NEXT_DROP;
349 (nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index)))
351 if (!nat_lru_free_one (sm, thread_index, now))
353 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
354 nat_ipfix_logging_max_sessions (thread_index,
355 sm->max_translations_per_thread);
356 nat_elog_notice ("maximum sessions exceeded");
357 return NAT_NEXT_DROP;
361 ip4_address_t sm_addr;
364 /* First try to match static mapping by local address and port */
365 if (snat_static_mapping_match
366 (sm, l_addr, l_port, rx_fib_index, nat_proto, &sm_addr, &sm_port,
367 &sm_fib_index, 0, 0, 0, &lb, 0, &identity_nat, 0))
369 s = nat_ed_session_alloc (sm, thread_index, now, proto);
371 s->in2out.addr = l_addr;
372 s->in2out.port = l_port;
373 s->nat_proto = nat_proto;
374 s->in2out.fib_index = rx_fib_index;
375 s->out2in.fib_index = sm->outside_fib_index;
377 switch (vec_len (sm->outside_fibs))
380 s->out2in.fib_index = sm->outside_fib_index;
383 s->out2in.fib_index = sm->outside_fibs[0].fib_index;
386 s->out2in.fib_index = nat_outside_fib_index_lookup (sm, r_addr);
390 /* Try to create dynamic translation */
391 outside_port = l_port; // suggest using local port to allocation function
392 if (nat_ed_alloc_addr_and_port (sm, rx_fib_index, nat_proto,
393 thread_index, r_addr, r_port, proto,
395 tsm->snat_thread_index, s,
397 &outside_port, &out2in_ed_kv))
399 nat_elog_notice ("addresses exhausted");
400 b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS];
401 nat_ed_session_delete (sm, s, thread_index, 1);
402 return NAT_NEXT_DROP;
404 s->out2in.addr = outside_addr;
405 s->out2in.port = outside_port;
409 if (PREDICT_FALSE (identity_nat))
414 s = nat_ed_session_alloc (sm, thread_index, now, proto);
416 s->out2in.addr = sm_addr;
417 s->out2in.port = sm_port;
418 s->in2out.addr = l_addr;
419 s->in2out.port = l_port;
420 s->nat_proto = nat_proto;
421 s->in2out.fib_index = rx_fib_index;
422 s->out2in.fib_index = sm->outside_fib_index;
423 switch (vec_len (sm->outside_fibs))
426 s->out2in.fib_index = sm->outside_fib_index;
429 s->out2in.fib_index = sm->outside_fibs[0].fib_index;
432 s->out2in.fib_index = nat_outside_fib_index_lookup (sm, r_addr);
436 s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
438 init_ed_kv (&out2in_ed_kv, sm_addr, sm_port, r_addr, r_port,
439 s->out2in.fib_index, proto, thread_index,
441 if (clib_bihash_add_or_overwrite_stale_16_8
442 (&sm->out2in_ed, &out2in_ed_kv, nat44_o2i_ed_is_idle_session_cb,
444 nat_elog_notice ("out2in-ed key add failed");
448 s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING;
449 s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
450 s->ext_host_addr = r_addr;
451 s->ext_host_port = r_port;
453 clib_bihash_kv_16_8_t in2out_ed_kv;
454 init_ed_kv (&in2out_ed_kv, l_addr, l_port, r_addr, r_port, rx_fib_index,
455 proto, thread_index, s - tsm->sessions);
457 ctx.thread_index = thread_index;
458 if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, &in2out_ed_kv,
459 nat44_i2o_ed_is_idle_session_cb,
461 nat_elog_notice ("in2out-ed key add failed");
466 nat_ipfix_logging_nat44_ses_create (thread_index,
467 s->in2out.addr.as_u32,
468 s->out2in.addr.as_u32,
471 s->out2in.port, s->in2out.fib_index);
473 nat_syslog_nat44_sadd (s->user_index, s->in2out.fib_index,
474 &s->in2out.addr, s->in2out.port,
475 &s->ext_host_nat_addr, s->ext_host_nat_port,
476 &s->out2in.addr, s->out2in.port,
477 &s->ext_host_addr, s->ext_host_port, s->nat_proto,
480 per_vrf_sessions_register_session (s, thread_index);
485 static_always_inline int
486 nat44_ed_not_translate (snat_main_t * sm, vlib_node_runtime_t * node,
487 u32 sw_if_index, ip4_header_t * ip, u32 proto,
488 u32 rx_fib_index, u32 thread_index)
490 udp_header_t *udp = ip4_next_header (ip);
491 clib_bihash_kv_16_8_t kv, value;
493 init_ed_k (&kv, ip->dst_address, udp->dst_port, ip->src_address,
494 udp->src_port, sm->outside_fib_index, ip->protocol);
496 /* NAT packet aimed at external address if has active sessions */
497 if (clib_bihash_search_16_8 (&sm->out2in_ed, &kv, &value))
499 /* or is static mappings */
500 ip4_address_t placeholder_addr;
501 u16 placeholder_port;
502 u32 placeholder_fib_index;
503 if (!snat_static_mapping_match
504 (sm, ip->dst_address, udp->dst_port, sm->outside_fib_index, proto,
505 &placeholder_addr, &placeholder_port, &placeholder_fib_index, 1, 0,
512 if (sm->forwarding_enabled)
515 return snat_not_translate_fast (sm, node, sw_if_index, ip, proto,
519 static_always_inline int
520 nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip,
521 u32 thread_index, f64 now,
522 vlib_main_t * vm, vlib_buffer_t * b)
524 clib_bihash_kv_16_8_t kv, value;
525 snat_session_t *s = 0;
526 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
528 if (!sm->forwarding_enabled)
531 if (ip->protocol == IP_PROTOCOL_ICMP)
533 if (get_icmp_i2o_ed_key (b, ip, 0, ~0, ~0, 0, 0, 0, &kv))
536 else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
538 init_ed_k (&kv, ip->src_address, vnet_buffer (b)->ip.reass.l4_src_port,
539 ip->dst_address, vnet_buffer (b)->ip.reass.l4_dst_port, 0,
544 init_ed_k (&kv, ip->src_address, 0, ip->dst_address, 0, 0,
548 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
550 ASSERT (thread_index == ed_value_get_thread_index (&value));
552 pool_elt_at_index (tsm->sessions,
553 ed_value_get_session_index (&value));
554 if (is_fwd_bypass_session (s))
556 if (ip->protocol == IP_PROTOCOL_TCP)
558 nat44_set_tcp_session_state_i2o (sm, now, s, b, thread_index);
561 nat44_session_update_counters (s, now,
562 vlib_buffer_length_in_chain (vm, b),
564 /* Per-user LRU list maintenance */
565 nat44_session_update_lru (sm, s, thread_index);
575 static_always_inline int
576 nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip,
577 u16 src_port, u16 dst_port,
578 u32 thread_index, u32 rx_sw_if_index,
579 u32 tx_sw_if_index, f64 now)
581 clib_bihash_kv_16_8_t kv, value;
582 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
585 u32 rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (rx_sw_if_index);
586 u32 tx_fib_index = ip4_fib_table_get_index_for_sw_if_index (tx_sw_if_index);
589 init_ed_k (&kv, ip->src_address, src_port, ip->dst_address, dst_port,
590 tx_fib_index, ip->protocol);
591 if (!clib_bihash_search_16_8 (&sm->out2in_ed, &kv, &value))
593 ASSERT (thread_index == ed_value_get_thread_index (&value));
595 pool_elt_at_index (tsm->sessions,
596 ed_value_get_session_index (&value));
597 if (nat44_is_ses_closed (s)
598 && (!s->tcp_closed_timestamp || now >= s->tcp_closed_timestamp))
600 nat_free_session_data (sm, s, thread_index, 0);
601 nat_ed_session_delete (sm, s, thread_index, 1);
607 init_ed_k (&kv, ip->dst_address, dst_port, ip->src_address, src_port,
608 rx_fib_index, ip->protocol);
609 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
611 ASSERT (thread_index == ed_value_get_thread_index (&value));
613 pool_elt_at_index (tsm->sessions,
614 ed_value_get_session_index (&value));
615 if (is_fwd_bypass_session (s))
620 pool_foreach (i, sm->output_feature_interfaces)
622 if ((nat_interface_is_inside (i)) && (rx_sw_if_index == i->sw_if_index))
632 #ifndef CLIB_MARCH_VARIANT
634 icmp_match_in2out_ed (snat_main_t * sm, vlib_node_runtime_t * node,
635 u32 thread_index, vlib_buffer_t * b,
636 ip4_header_t * ip, ip4_address_t * addr,
637 u16 * port, u32 * fib_index, nat_protocol_t * proto,
638 void *d, void *e, u8 * dont_translate)
642 clib_bihash_kv_16_8_t kv, value;
645 snat_session_t *s = NULL;
646 u16 l_port = 0, r_port = 0; // initialize to workaround gcc warning
647 vlib_main_t *vm = vlib_get_main ();
648 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
650 f64 now = vlib_time_now (vm);
652 sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
653 rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
656 get_icmp_i2o_ed_key (b, ip, rx_fib_index, ~0, ~0, proto, &l_port,
660 b->error = node->errors[err];
661 next = NAT_NEXT_DROP;
665 if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
667 if (vnet_buffer (b)->sw_if_index[VLIB_TX] != ~0)
670 (nat44_ed_not_translate_output_feature
671 (sm, ip, l_port, r_port, thread_index,
672 sw_if_index, vnet_buffer (b)->sw_if_index[VLIB_TX], now)))
680 if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, sw_if_index,
681 ip, NAT_PROTOCOL_ICMP,
691 (icmp_type_is_error_message
692 (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
694 b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
695 next = NAT_NEXT_DROP;
700 slow_path_ed (sm, b, ip->src_address, ip->dst_address, l_port, r_port,
701 ip->protocol, rx_fib_index, &s, node, next,
702 thread_index, vlib_time_now (vm));
704 if (PREDICT_FALSE (next == NAT_NEXT_DROP))
716 (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
718 && vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
720 && !icmp_type_is_error_message (vnet_buffer (b)->ip.
721 reass.icmp_type_or_tcp_flags)))
723 b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
724 next = NAT_NEXT_DROP;
728 ASSERT (thread_index == ed_value_get_thread_index (&value));
730 pool_elt_at_index (tsm->sessions,
731 ed_value_get_session_index (&value));
736 *addr = s->out2in.addr;
737 *port = s->out2in.port;
738 *fib_index = s->out2in.fib_index;
742 *(snat_session_t **) d = s;
748 static snat_session_t *
749 nat44_ed_in2out_unknown_proto (snat_main_t * sm,
755 vlib_main_t * vm, vlib_node_runtime_t * node)
757 clib_bihash_kv_8_8_t kv, value;
758 clib_bihash_kv_16_8_t s_kv, s_value;
759 snat_static_mapping_t *m;
760 u32 old_addr, new_addr = 0;
762 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
764 u32 outside_fib_index = sm->outside_fib_index;
768 switch (vec_len (sm->outside_fibs))
771 outside_fib_index = sm->outside_fib_index;
774 outside_fib_index = sm->outside_fibs[0].fib_index;
777 outside_fib_index = nat_outside_fib_index_lookup (sm, ip->dst_address);
780 old_addr = ip->src_address.as_u32;
782 init_ed_k (&s_kv, ip->src_address, 0, ip->dst_address, 0, rx_fib_index,
785 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &s_kv, &s_value))
787 ASSERT (thread_index == ed_value_get_thread_index (&s_value));
789 pool_elt_at_index (tsm->sessions,
790 ed_value_get_session_index (&s_value));
791 new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
796 (nat44_ed_maximum_sessions_exceeded
797 (sm, rx_fib_index, thread_index)))
799 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
800 nat_ipfix_logging_max_sessions (thread_index,
801 sm->max_translations_per_thread);
802 nat_elog_notice ("maximum sessions exceeded");
806 init_nat_k (&kv, ip->src_address, 0, rx_fib_index, 0);
808 /* Try to find static mapping first */
809 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value))
811 m = pool_elt_at_index (sm->static_mappings, value.value);
812 new_addr = ip->src_address.as_u32 = m->external_addr.as_u32;
819 pool_foreach (s, tsm->sessions) {
820 if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32)
822 new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
824 init_ed_k(&s_kv, s->out2in.addr, 0, ip->dst_address, 0, outside_fib_index, ip->protocol);
825 if (clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value))
833 for (i = 0; i < vec_len (sm->addresses); i++)
835 init_ed_k (&s_kv, sm->addresses[i].addr, 0, ip->dst_address, 0,
836 outside_fib_index, ip->protocol);
837 if (clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value))
839 new_addr = ip->src_address.as_u32 =
840 sm->addresses[i].addr.as_u32;
848 s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol);
851 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
852 nat_elog_warn ("create NAT session failed");
856 s->ext_host_addr.as_u32 = ip->dst_address.as_u32;
857 s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
858 s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
859 s->out2in.addr.as_u32 = new_addr;
860 s->out2in.fib_index = outside_fib_index;
861 s->in2out.addr.as_u32 = old_addr;
862 s->in2out.fib_index = rx_fib_index;
863 s->in2out.port = s->out2in.port = ip->protocol;
865 s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
867 /* Add to lookup tables */
868 init_ed_kv (&s_kv, s->in2out.addr, 0, ip->dst_address, 0, rx_fib_index,
869 ip->protocol, thread_index, s - tsm->sessions);
870 if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1))
871 nat_elog_notice ("in2out key add failed");
873 init_ed_kv (&s_kv, s->out2in.addr, 0, ip->dst_address, 0,
874 outside_fib_index, ip->protocol, thread_index,
876 if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &s_kv, 1))
877 nat_elog_notice ("out2in key add failed");
879 per_vrf_sessions_register_session (s, thread_index);
882 /* Update IP checksum */
884 sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address);
885 ip->checksum = ip_csum_fold (sum);
888 nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b),
890 /* Per-user LRU list maintenance */
891 nat44_session_update_lru (sm, s, thread_index);
894 if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
895 nat44_ed_hairpinning_unknown_proto (sm, b, ip);
897 if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
898 vnet_buffer (b)->sw_if_index[VLIB_TX] = outside_fib_index;
904 nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm,
905 vlib_node_runtime_t * node,
906 vlib_frame_t * frame,
907 int is_output_feature)
909 u32 n_left_from, *from;
910 snat_main_t *sm = &snat_main;
911 f64 now = vlib_time_now (vm);
912 u32 thread_index = vm->thread_index;
913 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
914 u32 def_slow = is_output_feature ? NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH
915 : NAT_NEXT_IN2OUT_ED_SLOW_PATH;
917 from = vlib_frame_vector_args (frame);
918 n_left_from = frame->n_vectors;
920 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
921 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
922 vlib_get_buffers (vm, from, b, n_left_from);
924 while (n_left_from > 0)
927 u32 sw_if_index0, rx_fib_index0, proto0, new_addr0, old_addr0,
929 u16 old_port0, new_port0;
933 snat_session_t *s0 = 0;
934 clib_bihash_kv_16_8_t kv0, value0;
940 /* Prefetch next iteration. */
941 if (PREDICT_TRUE (n_left_from >= 2))
947 vlib_prefetch_buffer_header (p2, LOAD);
949 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
952 if (is_output_feature)
954 iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
957 next[0] = vnet_buffer2 (b0)->nat.arc_next;
960 (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + iph_offset0);
962 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
964 fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0);
966 if (PREDICT_FALSE (ip0->ttl == 1))
968 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
969 icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
970 ICMP4_time_exceeded_ttl_exceeded_in_transit,
972 next[0] = NAT_NEXT_ICMP_ERROR;
976 udp0 = ip4_next_header (ip0);
977 tcp0 = (tcp_header_t *) udp0;
978 proto0 = ip_proto_to_nat_proto (ip0->protocol);
980 if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
986 if (is_output_feature)
989 (nat_not_translate_output_feature_fwd
990 (sm, ip0, thread_index, now, vm, b0)))
994 if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
1000 init_ed_k (&kv0, ip0->src_address,
1001 vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address,
1002 vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
1005 // lookup for session
1006 if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
1008 // session does not exist go slow path
1012 ASSERT (thread_index == ed_value_get_thread_index (&value0));
1014 pool_elt_at_index (tsm->sessions,
1015 ed_value_get_session_index (&value0));
1017 if (PREDICT_FALSE (per_vrf_sessions_is_expired (s0, thread_index)))
1019 // session is closed, go slow path
1020 nat_free_session_data (sm, s0, thread_index, 0);
1021 nat_ed_session_delete (sm, s0, thread_index, 1);
1022 next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
1026 if (s0->tcp_closed_timestamp)
1028 if (now >= s0->tcp_closed_timestamp)
1030 // session is closed, go slow path, freed in slow path
1035 // session in transitory timeout, drop
1036 b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TCP_CLOSED];
1037 next[0] = NAT_NEXT_DROP;
1042 // drop if session expired
1043 u64 sess_timeout_time;
1045 s0->last_heard + (f64) nat44_session_get_timeout (sm, s0);
1046 if (now >= sess_timeout_time)
1048 nat_free_session_data (sm, s0, thread_index, 0);
1049 nat_ed_session_delete (sm, s0, thread_index, 1);
1050 // session is closed, go slow path
1055 b0->flags |= VNET_BUFFER_F_IS_NATED;
1057 if (!is_output_feature)
1058 vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
1060 old_addr0 = ip0->src_address.as_u32;
1061 new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
1062 sum0 = ip0->checksum;
1064 ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1066 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1068 ip_csum_update (sum0, ip0->dst_address.as_u32,
1069 s0->ext_host_addr.as_u32, ip4_header_t,
1071 ip0->checksum = ip_csum_fold (sum0);
1073 old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
1075 if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
1077 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1079 new_port0 = udp0->src_port = s0->out2in.port;
1080 sum0 = tcp0->checksum;
1082 ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1085 ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
1087 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1090 ip_csum_update (sum0, ip0->dst_address.as_u32,
1091 s0->ext_host_addr.as_u32, ip4_header_t,
1094 ip_csum_update (sum0,
1095 vnet_buffer (b0)->ip.reass.l4_dst_port,
1096 s0->ext_host_port, ip4_header_t, length);
1097 tcp0->dst_port = s0->ext_host_port;
1098 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1100 mss_clamping (sm->mss_clamping, tcp0, &sum0);
1101 tcp0->checksum = ip_csum_fold (sum0);
1103 vlib_increment_simple_counter (&sm->counters.fastpath.in2out_ed.tcp,
1104 thread_index, sw_if_index0, 1);
1105 nat44_set_tcp_session_state_i2o (sm, now, s0, b0, thread_index);
1107 else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
1110 new_port0 = udp0->src_port = s0->out2in.port;
1111 sum0 = udp0->checksum;
1113 ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1116 ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, length);
1117 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1120 ip_csum_update (sum0, ip0->dst_address.as_u32,
1121 s0->ext_host_addr.as_u32, ip4_header_t,
1124 ip_csum_update (sum0, vnet_buffer (b0)->ip.reass.l4_dst_port,
1125 s0->ext_host_port, ip4_header_t, length);
1126 udp0->dst_port = s0->ext_host_port;
1127 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1129 udp0->checksum = ip_csum_fold (sum0);
1130 vlib_increment_simple_counter (&sm->counters.fastpath.in2out_ed.udp,
1131 thread_index, sw_if_index0, 1);
1135 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1137 new_port0 = udp0->src_port = s0->out2in.port;
1138 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1140 udp0->dst_port = s0->ext_host_port;
1141 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1143 vlib_increment_simple_counter (&sm->counters.fastpath.
1144 in2out_ed.udp, thread_index,
1150 nat44_session_update_counters (s0, now,
1151 vlib_buffer_length_in_chain (vm, b0),
1153 /* Per-user LRU list maintenance */
1154 nat44_session_update_lru (sm, s0, thread_index);
1158 ((node->flags & VLIB_NODE_FLAG_TRACE)
1159 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
1161 nat_in2out_ed_trace_t *t =
1162 vlib_add_trace (vm, node, b0, sizeof (*t));
1163 t->sw_if_index = sw_if_index0;
1164 t->next_index = next[0];
1165 t->is_slow_path = 0;
1168 t->session_index = s0 - tsm->sessions;
1170 t->session_index = ~0;
1173 if (next[0] == NAT_NEXT_DROP)
1175 vlib_increment_simple_counter (&sm->counters.fastpath.
1176 in2out_ed.drops, thread_index,
1184 vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
1186 return frame->n_vectors;
1190 nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm,
1191 vlib_node_runtime_t * node,
1192 vlib_frame_t * frame,
1193 int is_output_feature)
1195 u32 n_left_from, *from;
1196 snat_main_t *sm = &snat_main;
1197 f64 now = vlib_time_now (vm);
1198 u32 thread_index = vm->thread_index;
1199 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
1201 from = vlib_frame_vector_args (frame);
1202 n_left_from = frame->n_vectors;
1204 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1205 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
1206 vlib_get_buffers (vm, from, b, n_left_from);
1208 while (n_left_from > 0)
1211 u32 sw_if_index0, rx_fib_index0, proto0, new_addr0, old_addr0,
1213 u16 old_port0, new_port0;
1217 icmp46_header_t *icmp0;
1218 snat_session_t *s0 = 0;
1219 clib_bihash_kv_16_8_t kv0, value0;
1224 if (is_output_feature)
1225 iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
1227 next[0] = vnet_buffer2 (b0)->nat.arc_next;
1229 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
1232 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1234 fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0);
1236 if (PREDICT_FALSE (ip0->ttl == 1))
1238 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1239 icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
1240 ICMP4_time_exceeded_ttl_exceeded_in_transit,
1242 next[0] = NAT_NEXT_ICMP_ERROR;
1246 udp0 = ip4_next_header (ip0);
1247 tcp0 = (tcp_header_t *) udp0;
1248 icmp0 = (icmp46_header_t *) udp0;
1249 proto0 = ip_proto_to_nat_proto (ip0->protocol);
1251 if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
1253 s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0,
1255 thread_index, now, vm, node);
1257 next[0] = NAT_NEXT_DROP;
1259 vlib_increment_simple_counter (&sm->counters.slowpath.
1260 in2out_ed.other, thread_index,
1265 if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
1268 icmp_in2out_ed_slow_path (sm, b0, ip0, icmp0, sw_if_index0,
1269 rx_fib_index0, node, next[0], now,
1271 vlib_increment_simple_counter (&sm->counters.slowpath.
1272 in2out_ed.icmp, thread_index,
1277 init_ed_k (&kv0, ip0->src_address,
1278 vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address,
1279 vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
1281 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
1283 ASSERT (thread_index == ed_value_get_thread_index (&value0));
1285 pool_elt_at_index (tsm->sessions,
1286 ed_value_get_session_index (&value0));
1288 if (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp)
1290 nat_free_session_data (sm, s0, thread_index, 0);
1291 nat_ed_session_delete (sm, s0, thread_index, 1);
1298 if (is_output_feature)
1301 (nat44_ed_not_translate_output_feature
1302 (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port,
1303 vnet_buffer (b0)->ip.reass.l4_dst_port, thread_index,
1304 sw_if_index0, vnet_buffer (b0)->sw_if_index[VLIB_TX],
1309 * Send DHCP packets to the ipv4 stack, or we won't
1310 * be able to use dhcp client on the outside interface
1313 (proto0 == NAT_PROTOCOL_UDP
1314 && (vnet_buffer (b0)->ip.reass.l4_dst_port ==
1315 clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_server))
1316 && ip0->dst_address.as_u32 == 0xffffffff))
1322 (nat44_ed_not_translate
1323 (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0,
1329 slow_path_ed (sm, b0, ip0->src_address, ip0->dst_address,
1330 vnet_buffer (b0)->ip.reass.l4_src_port,
1331 vnet_buffer (b0)->ip.reass.l4_dst_port,
1332 ip0->protocol, rx_fib_index0, &s0, node, next[0],
1335 if (PREDICT_FALSE (next[0] == NAT_NEXT_DROP))
1338 if (PREDICT_FALSE (!s0))
1343 b0->flags |= VNET_BUFFER_F_IS_NATED;
1345 if (!is_output_feature)
1346 vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
1348 old_addr0 = ip0->src_address.as_u32;
1349 new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
1350 sum0 = ip0->checksum;
1351 sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1353 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1354 sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
1355 s0->ext_host_addr.as_u32, ip4_header_t,
1357 ip0->checksum = ip_csum_fold (sum0);
1359 old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
1361 if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
1363 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1365 new_port0 = udp0->src_port = s0->out2in.port;
1366 sum0 = tcp0->checksum;
1368 ip_csum_update (sum0, old_addr0, new_addr0,
1369 ip4_header_t, dst_address);
1371 ip_csum_update (sum0, old_port0, new_port0,
1372 ip4_header_t, length);
1373 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1376 ip_csum_update (sum0, ip0->dst_address.as_u32,
1377 s0->ext_host_addr.as_u32,
1378 ip4_header_t, dst_address);
1380 ip_csum_update (sum0,
1381 vnet_buffer (b0)->ip.reass.l4_dst_port,
1382 s0->ext_host_port, ip4_header_t, length);
1383 tcp0->dst_port = s0->ext_host_port;
1384 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1386 mss_clamping (sm->mss_clamping, tcp0, &sum0);
1387 tcp0->checksum = ip_csum_fold (sum0);
1389 vlib_increment_simple_counter (&sm->counters.slowpath.in2out_ed.tcp,
1390 thread_index, sw_if_index0, 1);
1391 nat44_set_tcp_session_state_i2o (sm, now, s0, b0, thread_index);
1393 else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
1396 new_port0 = udp0->src_port = s0->out2in.port;
1397 sum0 = udp0->checksum;
1399 ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1402 ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, length);
1403 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1405 sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
1406 s0->ext_host_addr.as_u32,
1407 ip4_header_t, dst_address);
1409 ip_csum_update (sum0,
1410 vnet_buffer (b0)->ip.reass.l4_dst_port,
1411 s0->ext_host_port, ip4_header_t, length);
1412 udp0->dst_port = s0->ext_host_port;
1413 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1415 udp0->checksum = ip_csum_fold (sum0);
1416 vlib_increment_simple_counter (&sm->counters.slowpath.in2out_ed.udp,
1417 thread_index, sw_if_index0, 1);
1421 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1423 new_port0 = udp0->src_port = s0->out2in.port;
1424 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1426 udp0->dst_port = s0->ext_host_port;
1427 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1429 vlib_increment_simple_counter (&sm->counters.slowpath.
1430 in2out_ed.udp, thread_index,
1436 nat44_session_update_counters (s0, now,
1437 vlib_buffer_length_in_chain
1438 (vm, b0), thread_index);
1439 /* Per-user LRU list maintenance */
1440 nat44_session_update_lru (sm, s0, thread_index);
1443 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
1444 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
1446 nat_in2out_ed_trace_t *t =
1447 vlib_add_trace (vm, node, b0, sizeof (*t));
1448 t->sw_if_index = sw_if_index0;
1449 t->next_index = next[0];
1450 t->is_slow_path = 1;
1453 t->session_index = s0 - tsm->sessions;
1455 t->session_index = ~0;
1458 if (next[0] == NAT_NEXT_DROP)
1460 vlib_increment_simple_counter (&sm->counters.slowpath.
1461 in2out_ed.drops, thread_index,
1470 vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
1473 return frame->n_vectors;
1476 VLIB_NODE_FN (nat44_ed_in2out_node) (vlib_main_t * vm,
1477 vlib_node_runtime_t * node,
1478 vlib_frame_t * frame)
1480 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 0);
1484 VLIB_REGISTER_NODE (nat44_ed_in2out_node) = {
1485 .name = "nat44-ed-in2out",
1486 .vector_size = sizeof (u32),
1487 .sibling_of = "nat-default",
1488 .format_trace = format_nat_in2out_ed_trace,
1489 .type = VLIB_NODE_TYPE_INTERNAL,
1490 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1491 .error_strings = nat_in2out_ed_error_strings,
1492 .runtime_data_bytes = sizeof (snat_runtime_t),
1496 VLIB_NODE_FN (nat44_ed_in2out_output_node) (vlib_main_t * vm,
1497 vlib_node_runtime_t * node,
1498 vlib_frame_t * frame)
1500 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 1);
1504 VLIB_REGISTER_NODE (nat44_ed_in2out_output_node) = {
1505 .name = "nat44-ed-in2out-output",
1506 .vector_size = sizeof (u32),
1507 .sibling_of = "nat-default",
1508 .format_trace = format_nat_in2out_ed_trace,
1509 .type = VLIB_NODE_TYPE_INTERNAL,
1510 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1511 .error_strings = nat_in2out_ed_error_strings,
1512 .runtime_data_bytes = sizeof (snat_runtime_t),
1516 VLIB_NODE_FN (nat44_ed_in2out_slowpath_node) (vlib_main_t * vm,
1517 vlib_node_runtime_t *
1518 node, vlib_frame_t * frame)
1520 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 0);
1524 VLIB_REGISTER_NODE (nat44_ed_in2out_slowpath_node) = {
1525 .name = "nat44-ed-in2out-slowpath",
1526 .vector_size = sizeof (u32),
1527 .sibling_of = "nat-default",
1528 .format_trace = format_nat_in2out_ed_trace,
1529 .type = VLIB_NODE_TYPE_INTERNAL,
1530 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1531 .error_strings = nat_in2out_ed_error_strings,
1532 .runtime_data_bytes = sizeof (snat_runtime_t),
1536 VLIB_NODE_FN (nat44_ed_in2out_output_slowpath_node) (vlib_main_t * vm,
1539 vlib_frame_t * frame)
1541 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 1);
1545 VLIB_REGISTER_NODE (nat44_ed_in2out_output_slowpath_node) = {
1546 .name = "nat44-ed-in2out-output-slowpath",
1547 .vector_size = sizeof (u32),
1548 .sibling_of = "nat-default",
1549 .format_trace = format_nat_in2out_ed_trace,
1550 .type = VLIB_NODE_TYPE_INTERNAL,
1551 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1552 .error_strings = nat_in2out_ed_error_strings,
1553 .runtime_data_bytes = sizeof (snat_runtime_t),
1558 format_nat_pre_trace (u8 * s, va_list * args)
1560 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1561 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1562 nat_pre_trace_t *t = va_arg (*args, nat_pre_trace_t *);
1563 return format (s, "in2out next_index %d arc_next_index %d", t->next_index,
1567 VLIB_NODE_FN (nat_pre_in2out_node)
1568 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1570 return nat_pre_node_fn_inline (vm, node, frame,
1571 NAT_NEXT_IN2OUT_ED_FAST_PATH);
1574 VLIB_NODE_FN (nat_pre_in2out_output_node)
1575 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1577 return nat_pre_node_fn_inline (vm, node, frame,
1578 NAT_NEXT_IN2OUT_ED_OUTPUT_FAST_PATH);
1582 VLIB_REGISTER_NODE (nat_pre_in2out_node) = {
1583 .name = "nat-pre-in2out",
1584 .vector_size = sizeof (u32),
1585 .sibling_of = "nat-default",
1586 .format_trace = format_nat_pre_trace,
1587 .type = VLIB_NODE_TYPE_INTERNAL,
1591 VLIB_REGISTER_NODE (nat_pre_in2out_output_node) = {
1592 .name = "nat-pre-in2out-output",
1593 .vector_size = sizeof (u32),
1594 .sibling_of = "nat-default",
1595 .format_trace = format_nat_pre_trace,
1596 .type = VLIB_NODE_TYPE_INTERNAL,
1602 * fd.io coding-style-patch-verification: ON
1605 * eval: (c-set-style "gnu")