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/pg/pg.h>
23 #include <vnet/ip/ip.h>
24 #include <vnet/ethernet/ethernet.h>
25 #include <vnet/fib/ip4_fib.h>
26 #include <vnet/udp/udp.h>
27 #include <vppinfra/error.h>
29 #include <nat/nat_ipfix_logging.h>
30 #include <nat/nat_inlines.h>
31 #include <nat/nat44/inlines.h>
32 #include <nat/nat_syslog.h>
33 #include <nat/nat_ha.h>
35 static char *nat_in2out_ed_error_strings[] = {
36 #define _(sym,string) string,
37 foreach_nat_in2out_ed_error
47 } nat_in2out_ed_trace_t;
50 format_nat_in2out_ed_trace (u8 * s, va_list * args)
52 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
53 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
54 nat_in2out_ed_trace_t *t = va_arg (*args, nat_in2out_ed_trace_t *);
58 t->is_slow_path ? "NAT44_IN2OUT_ED_SLOW_PATH" :
59 "NAT44_IN2OUT_ED_FAST_PATH";
61 s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag,
62 t->sw_if_index, t->next_index, t->session_index);
67 #ifndef CLIB_MARCH_VARIANT
69 nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg)
71 snat_main_t *sm = &snat_main;
72 nat44_is_idle_session_ctx_t *ctx = arg;
74 u64 sess_timeout_time;
77 ip4_address_t *l_addr, *r_addr;
79 clib_bihash_kv_16_8_t ed_kv;
82 snat_session_key_t key;
83 snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
86 s = pool_elt_at_index (tsm->sessions, kv->value);
87 sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s);
88 if (ctx->now >= sess_timeout_time)
90 if (is_fwd_bypass_session (s))
93 l_addr = &s->out2in.addr;
94 r_addr = &s->ext_host_addr;
95 fib_index = s->out2in.fib_index;
96 if (snat_is_unk_proto_session (s))
98 proto = s->in2out.port;
104 proto = snat_proto_to_ip_proto (s->in2out.protocol);
105 l_port = s->out2in.port;
106 r_port = s->ext_host_port;
108 make_ed_kv (l_addr, r_addr, proto, fib_index, l_port, r_port, ~0ULL,
110 if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &ed_kv, 0))
111 nat_elog_warn ("out2in_ed key del failed");
113 if (snat_is_unk_proto_session (s))
116 snat_ipfix_logging_nat44_ses_delete (ctx->thread_index,
117 s->in2out.addr.as_u32,
118 s->out2in.addr.as_u32,
122 s->in2out.fib_index);
124 nat_syslog_nat44_sdel (s->user_index, s->in2out.fib_index,
125 &s->in2out.addr, s->in2out.port,
126 &s->ext_host_nat_addr, s->ext_host_nat_port,
127 &s->out2in.addr, s->out2in.port,
128 &s->ext_host_addr, s->ext_host_port,
129 s->in2out.protocol, is_twice_nat_session (s));
131 nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
132 s->ext_host_port, s->out2in.protocol, s->out2in.fib_index,
135 if (is_twice_nat_session (s))
137 for (i = 0; i < vec_len (sm->twice_nat_addresses); i++)
139 key.protocol = s->in2out.protocol;
140 key.port = s->ext_host_nat_port;
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,
152 if (snat_is_session_static (s))
155 snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
158 nat44_ed_delete_session (sm, s, ctx->thread_index, 1);
167 icmp_in2out_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0,
168 ip4_header_t * ip0, icmp46_header_t * icmp0,
169 u32 sw_if_index0, u32 rx_fib_index0,
170 vlib_node_runtime_t * node, u32 next0, f64 now,
171 u32 thread_index, snat_session_t ** p_s0)
173 vlib_main_t *vm = vlib_get_main ();
175 next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
176 next0, thread_index, p_s0, 0);
177 snat_session_t *s0 = *p_s0;
178 if (PREDICT_TRUE (next0 != NAT_NEXT_DROP && s0))
181 nat44_session_update_counters (s0, now,
182 vlib_buffer_length_in_chain
183 (vm, b0), thread_index);
184 /* Per-user LRU list maintenance */
185 nat44_session_update_lru (sm, s0, thread_index);
190 static_always_inline u16
191 snat_random_port (u16 min, u16 max)
193 snat_main_t *sm = &snat_main;
194 return min + random_u32 (&sm->random_seed) /
195 (random_u32_max () / (max - min + 1) + 1);
199 nat_ed_alloc_addr_and_port (snat_main_t * sm, u32 rx_fib_index,
200 u32 snat_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 * allocated_addr,
205 u16 * allocated_port,
206 clib_bihash_kv_16_8_t * out2in_ed_kv)
209 snat_address_t *a, *ga = 0;
211 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
213 const u16 port_thread_offset = (port_per_thread * snat_thread_index) + 1024;
215 for (i = 0; i < vec_len (sm->addresses); i++)
217 a = sm->addresses + i;
220 #define _(N, j, n, unused) \
221 case SNAT_PROTOCOL_##N: \
222 if (a->fib_index == rx_fib_index) \
224 u16 port = snat_random_port (1, port_per_thread); \
225 u16 attempts = port_per_thread; \
226 while (attempts > 0) \
229 portnum = port_thread_offset + port; \
230 make_ed_kv (&a->addr, &r_addr, proto, s->out2in.fib_index, \
231 clib_host_to_net_u16 (portnum), r_port, \
232 s - tsm->sessions, out2in_ed_kv); \
233 int rv = clib_bihash_add_del_16_8 (&tsm->out2in_ed, out2in_ed_kv, \
237 ++a->busy_##n##_port_refcounts[portnum]; \
238 a->busy_##n##_ports_per_thread[thread_index]++; \
239 a->busy_##n##_ports++; \
240 *allocated_addr = a->addr; \
241 *allocated_port = clib_host_to_net_u16 (portnum); \
244 port = (port + 1) % port_per_thread; \
247 else if (a->fib_index == ~0) \
253 foreach_snat_protocol;
255 nat_elog_info ("unknown protocol");
262 /* fake fib_index to reuse macro */
267 foreach_snat_protocol;
269 nat_elog_info ("unknown protocol");
276 /* Totally out of translations to use... */
277 snat_ipfix_logging_addresses_exhausted (thread_index, 0);
282 slow_path_ed (snat_main_t * sm,
284 ip4_address_t l_addr,
285 ip4_address_t r_addr,
290 snat_session_t ** sessionp,
291 vlib_node_runtime_t * node, u32 next, u32 thread_index, f64 now)
293 snat_session_t *s = NULL;
294 snat_session_key_t key0, key1;
295 lb_nat_type_t lb = 0;
296 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
297 u32 snat_proto = ip_proto_to_snat_proto (proto);
298 nat_outside_fib_t *outside_fib;
299 fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
300 clib_bihash_kv_16_8_t out2in_ed_kv;
301 ip4_address_t allocated_addr;
305 .fp_proto = FIB_PROTOCOL_IP4,
307 .fp_addr = {.ip4.as_u32 = r_addr.as_u32,},
309 nat44_is_idle_session_ctx_t ctx;
311 if (PREDICT_TRUE (snat_proto == SNAT_PROTOCOL_TCP))
315 (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
317 b->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
318 return NAT_NEXT_DROP;
322 // TODO: based on fib index do a lookup
324 (nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index)))
326 if (!nat_global_lru_free_one (sm, thread_index, now))
328 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
329 nat_ipfix_logging_max_sessions (thread_index, sm->max_translations);
330 nat_elog_notice ("maximum sessions exceeded");
331 return NAT_NEXT_DROP;
337 key1.protocol = key0.protocol = snat_proto;
338 key0.fib_index = rx_fib_index;
339 key1.fib_index = sm->outside_fib_index;
341 /* First try to match static mapping by local address and port */
342 if (snat_static_mapping_match
343 (sm, key0, &key1, 0, 0, 0, &lb, 0, &identity_nat))
345 s = nat_ed_session_alloc (sm, thread_index, now);
348 nat_elog_warn ("create NAT session failed");
349 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
350 return NAT_NEXT_DROP;
352 switch (vec_len (sm->outside_fibs))
355 s->out2in.fib_index = sm->outside_fib_index;
358 s->out2in.fib_index = sm->outside_fibs[0].fib_index;
362 vec_foreach (outside_fib, sm->outside_fibs)
364 fei = fib_table_lookup (outside_fib->fib_index, &pfx);
365 if (FIB_NODE_INDEX_INVALID != fei)
367 if (fib_entry_get_resolving_interface (fei) != ~0)
369 s->out2in.fib_index = outside_fib->fib_index;
378 /* Try to create dynamic translation */
379 if (nat_ed_alloc_addr_and_port (sm, rx_fib_index, snat_proto,
380 thread_index, r_addr, r_port, proto,
382 tsm->snat_thread_index, s,
384 &allocated_port, &out2in_ed_kv))
386 nat_elog_notice ("addresses exhausted");
387 b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS];
388 nat_free_session_data (sm, s, thread_index, 0);
389 nat44_ed_delete_session (sm, s, thread_index, 1);
390 return NAT_NEXT_DROP;
392 key1.addr = allocated_addr;
393 key1.port = allocated_port;
397 if (PREDICT_FALSE (identity_nat))
402 s = nat_ed_session_alloc (sm, thread_index, now);
405 nat_elog_warn ("create NAT session failed");
406 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
407 return NAT_NEXT_DROP;
409 switch (vec_len (sm->outside_fibs))
412 s->out2in.fib_index = sm->outside_fib_index;
415 s->out2in.fib_index = sm->outside_fibs[0].fib_index;
419 vec_foreach (outside_fib, sm->outside_fibs)
421 fei = fib_table_lookup (outside_fib->fib_index, &pfx);
422 if (FIB_NODE_INDEX_INVALID != fei)
424 if (fib_entry_get_resolving_interface (fei) != ~0)
426 s->out2in.fib_index = outside_fib->fib_index;
435 s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
438 make_ed_kv (&key1.addr, &r_addr, proto,
439 s->out2in.fib_index, key1.port, r_port, s - tsm->sessions,
441 if (clib_bihash_add_or_overwrite_stale_16_8
442 (&tsm->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;
454 s->out2in.protocol = key0.protocol;
456 clib_bihash_kv_16_8_t in2out_ed_kv;
457 make_ed_kv (&l_addr, &r_addr, proto, rx_fib_index, l_port, r_port,
458 s - tsm->sessions, &in2out_ed_kv);
460 ctx.thread_index = thread_index;
461 if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, &in2out_ed_kv,
462 nat44_i2o_ed_is_idle_session_cb,
464 nat_elog_notice ("in2out-ed key add failed");
469 snat_ipfix_logging_nat44_ses_create (thread_index,
470 s->in2out.addr.as_u32,
471 s->out2in.addr.as_u32,
474 s->out2in.port, s->in2out.fib_index);
476 nat_syslog_nat44_sadd (s->user_index, s->in2out.fib_index,
477 &s->in2out.addr, s->in2out.port,
478 &s->ext_host_nat_addr, s->ext_host_nat_port,
479 &s->out2in.addr, s->out2in.port,
480 &s->ext_host_addr, s->ext_host_port,
481 s->in2out.protocol, 0);
483 nat_ha_sadd (&s->in2out.addr, s->in2out.port, &s->out2in.addr,
484 s->out2in.port, &s->ext_host_addr, s->ext_host_port,
485 &s->ext_host_nat_addr, s->ext_host_nat_port,
486 s->in2out.protocol, s->in2out.fib_index, s->flags,
492 static_always_inline int
493 nat44_ed_not_translate (snat_main_t * sm, vlib_node_runtime_t * node,
494 u32 sw_if_index, ip4_header_t * ip, u32 proto,
495 u32 rx_fib_index, u32 thread_index)
497 udp_header_t *udp = ip4_next_header (ip);
498 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
499 clib_bihash_kv_16_8_t kv, value;
500 snat_session_key_t key0, key1;
502 make_ed_kv (&ip->dst_address, &ip->src_address, ip->protocol,
503 sm->outside_fib_index, udp->dst_port, udp->src_port, ~0ULL,
506 /* NAT packet aimed at external address if has active sessions */
507 if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
509 key0.addr = ip->dst_address;
510 key0.port = udp->dst_port;
511 key0.protocol = proto;
512 key0.fib_index = sm->outside_fib_index;
513 /* or is static mappings */
514 if (!snat_static_mapping_match (sm, key0, &key1, 1, 0, 0, 0, 0, 0))
520 if (sm->forwarding_enabled)
523 return snat_not_translate_fast (sm, node, sw_if_index, ip, proto,
527 static_always_inline int
528 nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip,
529 u32 thread_index, f64 now,
530 vlib_main_t * vm, vlib_buffer_t * b)
532 clib_bihash_kv_16_8_t kv, value;
533 snat_session_t *s = 0;
534 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
536 if (!sm->forwarding_enabled)
539 if (ip->protocol == IP_PROTOCOL_ICMP)
541 if (get_icmp_i2o_ed_key (b, ip, 0, ~0ULL, 0, 0, 0, &kv))
544 else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
546 make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol, 0,
547 vnet_buffer (b)->ip.reass.l4_src_port,
548 vnet_buffer (b)->ip.reass.l4_dst_port, ~0ULL, &kv);
552 make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol, 0, 0,
556 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
558 s = pool_elt_at_index (tsm->sessions, value.value);
559 if (is_fwd_bypass_session (s))
561 if (ip->protocol == IP_PROTOCOL_TCP)
563 if (nat44_set_tcp_session_state_i2o
564 (sm, now, s, b, thread_index))
568 nat44_session_update_counters (s, now,
569 vlib_buffer_length_in_chain (vm, b),
571 /* Per-user LRU list maintenance */
572 nat44_session_update_lru (sm, s, thread_index);
582 static_always_inline int
583 nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip,
584 u16 src_port, u16 dst_port,
585 u32 thread_index, u32 rx_sw_if_index,
588 clib_bihash_kv_16_8_t kv, value;
589 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
592 u32 rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (rx_sw_if_index);
593 u32 tx_fib_index = ip4_fib_table_get_index_for_sw_if_index (tx_sw_if_index);
596 make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol,
597 tx_fib_index, src_port, dst_port, ~0ULL, &kv);
598 if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
600 s = pool_elt_at_index (tsm->sessions, value.value);
601 if (nat44_is_ses_closed (s))
603 nat_free_session_data (sm, s, thread_index, 0);
604 nat44_ed_delete_session (sm, s, thread_index, 1);
607 s->flags |= SNAT_SESSION_FLAG_OUTPUT_FEATURE;
612 make_ed_kv (&ip->dst_address, &ip->src_address, ip->protocol,
613 rx_fib_index, dst_port, src_port, ~0ULL, &kv);
614 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
616 s = pool_elt_at_index (tsm->sessions, value.value);
617 if (is_fwd_bypass_session (s))
622 pool_foreach (i, sm->output_feature_interfaces,
624 if ((nat_interface_is_inside (i)) && (rx_sw_if_index == i->sw_if_index))
634 #ifndef CLIB_MARCH_VARIANT
636 icmp_match_in2out_ed (snat_main_t * sm, vlib_node_runtime_t * node,
637 u32 thread_index, vlib_buffer_t * b, ip4_header_t * ip,
638 u8 * p_proto, snat_session_key_t * p_value,
639 u8 * p_dont_translate, void *d, void *e)
643 snat_session_t *s = 0;
644 u8 dont_translate = 0;
645 clib_bihash_kv_16_8_t kv, value;
648 u16 l_port = 0, r_port = 0; // initialize to workaround gcc warning
649 vlib_main_t *vm = vlib_get_main ();
650 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
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, ~0ULL, p_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])))
680 if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, sw_if_index,
681 ip, SNAT_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 s = pool_elt_at_index (tsm->sessions, value.value);
732 *p_value = s->out2in;
733 *p_dont_translate = dont_translate;
735 *(snat_session_t **) d = s;
740 static snat_session_t *
741 nat44_ed_in2out_unknown_proto (snat_main_t * sm,
747 vlib_main_t * vm, vlib_node_runtime_t * node)
749 clib_bihash_kv_8_8_t kv, value;
750 clib_bihash_kv_16_8_t s_kv, s_value;
751 snat_static_mapping_t *m;
752 u32 old_addr, new_addr = 0;
754 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
756 u32 outside_fib_index = sm->outside_fib_index;
759 nat_outside_fib_t *outside_fib;
760 fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
762 .fp_proto = FIB_PROTOCOL_IP4,
765 .ip4.as_u32 = ip->dst_address.as_u32,
769 switch (vec_len (sm->outside_fibs))
772 outside_fib_index = sm->outside_fib_index;
775 outside_fib_index = sm->outside_fibs[0].fib_index;
779 vec_foreach (outside_fib, sm->outside_fibs)
781 fei = fib_table_lookup (outside_fib->fib_index, &pfx);
782 if (FIB_NODE_INDEX_INVALID != fei)
784 if (fib_entry_get_resolving_interface (fei) != ~0)
786 outside_fib_index = outside_fib->fib_index;
794 old_addr = ip->src_address.as_u32;
796 make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol,
797 rx_fib_index, 0, 0, ~0ULL, &s_kv);
799 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &s_kv, &s_value))
801 s = pool_elt_at_index (tsm->sessions, s_value.value);
802 new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
807 (nat44_ed_maximum_sessions_exceeded
808 (sm, rx_fib_index, thread_index)))
810 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
811 nat_ipfix_logging_max_sessions (thread_index, sm->max_translations);
812 nat_elog_notice ("maximum sessions exceeded");
816 make_sm_kv (&kv, &ip->src_address, 0, rx_fib_index, 0);
818 /* Try to find static mapping first */
819 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value))
821 m = pool_elt_at_index (sm->static_mappings, value.value);
822 new_addr = ip->src_address.as_u32 = m->external_addr.as_u32;
829 pool_foreach (s, tsm->sessions, {
830 if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32)
832 new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
834 make_ed_kv (&s->out2in.addr, &ip->dst_address, ip->protocol,
835 outside_fib_index, 0, 0, ~0ULL, &s_kv);
836 if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
844 for (i = 0; i < vec_len (sm->addresses); i++)
846 make_ed_kv (&sm->addresses[i].addr, &ip->dst_address,
847 ip->protocol, outside_fib_index, 0, 0, ~0ULL,
849 if (clib_bihash_search_16_8 (&tsm->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);
863 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_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 make_ed_kv (&s->in2out.addr, &ip->dst_address, ip->protocol,
881 rx_fib_index, 0, 0, s - tsm->sessions, &s_kv);
882 if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1))
883 nat_elog_notice ("in2out key add failed");
885 make_ed_kv (&s->out2in.addr, &ip->dst_address, ip->protocol,
886 outside_fib_index, 0, 0, s - tsm->sessions, &s_kv);
887 if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &s_kv, 1))
888 nat_elog_notice ("out2in key add failed");
891 /* Update IP checksum */
893 sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address);
894 ip->checksum = ip_csum_fold (sum);
897 nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b),
899 /* Per-user LRU list maintenance */
900 nat44_session_update_lru (sm, s, thread_index);
903 if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
904 nat44_ed_hairpinning_unknown_proto (sm, b, ip);
906 if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
907 vnet_buffer (b)->sw_if_index[VLIB_TX] = outside_fib_index;
913 nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm,
914 vlib_node_runtime_t * node,
915 vlib_frame_t * frame,
916 int is_output_feature)
918 u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
919 nat_next_t next_index;
920 snat_main_t *sm = &snat_main;
921 f64 now = vlib_time_now (vm);
922 u32 thread_index = vm->thread_index;
923 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
924 u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets =
927 def_slow = is_output_feature ? NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH :
928 NAT_NEXT_IN2OUT_ED_SLOW_PATH;
930 stats_node_index = sm->ed_in2out_node_index;
932 from = vlib_frame_vector_args (frame);
933 n_left_from = frame->n_vectors;
934 next_index = node->cached_next_index;
936 while (n_left_from > 0)
940 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
942 while (n_left_from > 0 && n_left_to_next > 0)
946 u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0,
947 new_addr0, old_addr0;
948 u16 old_port0, new_port0;
952 snat_session_t *s0 = 0;
953 clib_bihash_kv_16_8_t kv0, value0;
956 /* speculatively enqueue b0 to the current next frame */
964 b0 = vlib_get_buffer (vm, bi0);
966 if (is_output_feature)
968 vnet_feature_next (&vnet_buffer2 (b0)->nat.arc_next, b0);
969 iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
972 next0 = vnet_buffer2 (b0)->nat.arc_next;
974 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
977 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
979 fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
982 if (PREDICT_FALSE (ip0->ttl == 1))
984 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
985 icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
986 ICMP4_time_exceeded_ttl_exceeded_in_transit,
988 next0 = NAT_NEXT_ICMP_ERROR;
992 udp0 = ip4_next_header (ip0);
993 tcp0 = (tcp_header_t *) udp0;
994 proto0 = ip_proto_to_snat_proto (ip0->protocol);
996 if (PREDICT_FALSE (proto0 == ~0))
1002 if (is_output_feature)
1004 if (PREDICT_FALSE (nat_not_translate_output_feature_fwd
1005 (sm, ip0, thread_index, now, vm, b0)))
1009 if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
1015 make_ed_kv (&ip0->src_address, &ip0->dst_address,
1016 ip0->protocol, rx_fib_index0,
1017 vnet_buffer (b0)->ip.reass.l4_src_port,
1018 vnet_buffer (b0)->ip.reass.l4_dst_port, ~0ULL, &kv0);
1020 // lookup for session
1021 if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
1023 // session does not exist go slow path
1027 s0 = pool_elt_at_index (tsm->sessions, value0.value);
1029 if (s0->tcp_close_timestamp)
1031 if (now >= s0->tcp_close_timestamp)
1033 // session is closed, go slow path
1038 // session in transitory timeout, drop
1039 b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TCP_CLOSED];
1040 next0 = NAT_NEXT_DROP;
1045 // drop if session expired
1046 u64 sess_timeout_time;
1047 sess_timeout_time = s0->last_heard +
1048 (f64) nat44_session_get_timeout (sm, s0);
1049 if (now >= sess_timeout_time)
1051 nat_free_session_data (sm, s0, thread_index, 0);
1052 nat44_ed_delete_session (sm, s0, thread_index, 1);
1053 // session is closed, go slow path
1058 b0->flags |= VNET_BUFFER_F_IS_NATED;
1060 if (!is_output_feature)
1061 vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
1063 old_addr0 = ip0->src_address.as_u32;
1064 new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
1065 sum0 = ip0->checksum;
1066 sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1068 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1069 sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
1070 s0->ext_host_addr.as_u32, ip4_header_t,
1072 ip0->checksum = ip_csum_fold (sum0);
1074 old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
1076 if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
1078 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1080 new_port0 = udp0->src_port = s0->out2in.port;
1081 sum0 = tcp0->checksum;
1083 ip_csum_update (sum0, old_addr0, new_addr0,
1084 ip4_header_t, dst_address);
1086 ip_csum_update (sum0, old_port0, new_port0,
1087 ip4_header_t, length);
1088 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1091 ip_csum_update (sum0, ip0->dst_address.as_u32,
1092 s0->ext_host_addr.as_u32,
1093 ip4_header_t, dst_address);
1095 ip_csum_update (sum0,
1096 vnet_buffer (b0)->ip.
1097 reass.l4_dst_port, s0->ext_host_port,
1098 ip4_header_t, length);
1099 tcp0->dst_port = s0->ext_host_port;
1100 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1102 mss_clamping (sm, tcp0, &sum0);
1103 tcp0->checksum = ip_csum_fold (sum0);
1106 if (nat44_set_tcp_session_state_i2o
1107 (sm, now, s0, b0, thread_index))
1110 else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
1113 new_port0 = udp0->src_port = s0->out2in.port;
1114 sum0 = udp0->checksum;
1116 ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1119 ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
1121 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1123 sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
1124 s0->ext_host_addr.as_u32,
1125 ip4_header_t, dst_address);
1127 ip_csum_update (sum0,
1128 vnet_buffer (b0)->ip.reass.l4_dst_port,
1129 s0->ext_host_port, ip4_header_t, length);
1130 udp0->dst_port = s0->ext_host_port;
1131 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1133 udp0->checksum = ip_csum_fold (sum0);
1138 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1140 new_port0 = udp0->src_port = s0->out2in.port;
1141 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1143 udp0->dst_port = s0->ext_host_port;
1144 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1151 nat44_session_update_counters (s0, now,
1152 vlib_buffer_length_in_chain
1153 (vm, b0), thread_index);
1154 /* Per-user LRU list maintenance */
1155 nat44_session_update_lru (sm, s0, thread_index);
1158 if (PREDICT_FALSE ((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 = next0;
1165 t->is_slow_path = 0;
1168 t->session_index = s0 - tsm->sessions;
1170 t->session_index = ~0;
1173 pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next;
1174 /* verify speculative enqueue, maybe switch current next frame */
1175 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1176 to_next, n_left_to_next,
1180 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1183 vlib_node_increment_counter (vm, stats_node_index,
1184 NAT_IN2OUT_ED_ERROR_IN2OUT_PACKETS,
1186 vlib_node_increment_counter (vm, stats_node_index,
1187 NAT_IN2OUT_ED_ERROR_TCP_PACKETS, tcp_packets);
1188 vlib_node_increment_counter (vm, stats_node_index,
1189 NAT_IN2OUT_ED_ERROR_UDP_PACKETS, udp_packets);
1190 vlib_node_increment_counter (vm, stats_node_index,
1191 NAT_IN2OUT_ED_ERROR_ICMP_PACKETS,
1193 vlib_node_increment_counter (vm, stats_node_index,
1194 NAT_IN2OUT_ED_ERROR_OTHER_PACKETS,
1196 return frame->n_vectors;
1200 nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm,
1201 vlib_node_runtime_t * node,
1202 vlib_frame_t * frame,
1203 int is_output_feature)
1205 u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
1206 nat_next_t next_index;
1207 snat_main_t *sm = &snat_main;
1208 f64 now = vlib_time_now (vm);
1209 u32 thread_index = vm->thread_index;
1210 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
1211 u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets = 0;
1213 stats_node_index = sm->ed_in2out_slowpath_node_index;
1215 from = vlib_frame_vector_args (frame);
1216 n_left_from = frame->n_vectors;
1217 next_index = node->cached_next_index;
1219 while (n_left_from > 0)
1223 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1225 while (n_left_from > 0 && n_left_to_next > 0)
1229 u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0,
1230 new_addr0, old_addr0;
1231 u16 old_port0, new_port0;
1235 icmp46_header_t *icmp0;
1236 snat_session_t *s0 = 0;
1237 clib_bihash_kv_16_8_t kv0, value0;
1240 /* speculatively enqueue b0 to the current next frame */
1246 n_left_to_next -= 1;
1248 b0 = vlib_get_buffer (vm, bi0);
1250 if (is_output_feature)
1251 iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
1253 next0 = vnet_buffer2 (b0)->nat.arc_next;
1255 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
1258 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1260 fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
1263 if (PREDICT_FALSE (ip0->ttl == 1))
1265 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1266 icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
1267 ICMP4_time_exceeded_ttl_exceeded_in_transit,
1269 next0 = NAT_NEXT_ICMP_ERROR;
1273 udp0 = ip4_next_header (ip0);
1274 tcp0 = (tcp_header_t *) udp0;
1275 icmp0 = (icmp46_header_t *) udp0;
1276 proto0 = ip_proto_to_snat_proto (ip0->protocol);
1278 if (PREDICT_FALSE (proto0 == ~0))
1280 s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0,
1285 next0 = NAT_NEXT_DROP;
1291 if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
1293 next0 = icmp_in2out_ed_slow_path
1294 (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0,
1295 node, next0, now, thread_index, &s0);
1301 make_ed_kv (&ip0->src_address, &ip0->dst_address,
1302 ip0->protocol, rx_fib_index0,
1303 vnet_buffer (b0)->ip.reass.l4_src_port,
1304 vnet_buffer (b0)->ip.reass.l4_dst_port, ~0ULL, &kv0);
1306 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
1308 s0 = pool_elt_at_index (tsm->sessions, value0.value);
1310 if (s0->tcp_close_timestamp && now >= s0->tcp_close_timestamp)
1312 nat_free_session_data (sm, s0, thread_index, 0);
1313 nat44_ed_delete_session (sm, s0, thread_index, 1);
1320 if (is_output_feature)
1323 (nat44_ed_not_translate_output_feature
1324 (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port,
1325 vnet_buffer (b0)->ip.reass.l4_dst_port, thread_index,
1327 vnet_buffer (b0)->sw_if_index[VLIB_TX])))
1331 * Send DHCP packets to the ipv4 stack, or we won't
1332 * be able to use dhcp client on the outside interface
1335 (proto0 == SNAT_PROTOCOL_UDP
1336 && (vnet_buffer (b0)->ip.reass.l4_dst_port ==
1337 clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_server))
1338 && ip0->dst_address.as_u32 == 0xffffffff))
1344 (nat44_ed_not_translate
1345 (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0,
1351 slow_path_ed (sm, b0, ip0->src_address, ip0->dst_address,
1352 vnet_buffer (b0)->ip.reass.l4_src_port,
1353 vnet_buffer (b0)->ip.reass.l4_dst_port,
1354 ip0->protocol, rx_fib_index0, &s0, node, next0,
1357 if (PREDICT_FALSE (next0 == NAT_NEXT_DROP))
1360 if (PREDICT_FALSE (!s0))
1365 b0->flags |= VNET_BUFFER_F_IS_NATED;
1367 if (!is_output_feature)
1368 vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
1370 old_addr0 = ip0->src_address.as_u32;
1371 new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
1372 sum0 = ip0->checksum;
1373 sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1375 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1376 sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
1377 s0->ext_host_addr.as_u32, ip4_header_t,
1379 ip0->checksum = ip_csum_fold (sum0);
1381 old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
1383 if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
1385 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1387 new_port0 = udp0->src_port = s0->out2in.port;
1388 sum0 = tcp0->checksum;
1390 ip_csum_update (sum0, old_addr0, new_addr0,
1391 ip4_header_t, dst_address);
1393 ip_csum_update (sum0, old_port0, new_port0,
1394 ip4_header_t, length);
1395 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1398 ip_csum_update (sum0, ip0->dst_address.as_u32,
1399 s0->ext_host_addr.as_u32,
1400 ip4_header_t, dst_address);
1402 ip_csum_update (sum0,
1403 vnet_buffer (b0)->ip.
1404 reass.l4_dst_port, s0->ext_host_port,
1405 ip4_header_t, length);
1406 tcp0->dst_port = s0->ext_host_port;
1407 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1409 mss_clamping (sm, tcp0, &sum0);
1410 tcp0->checksum = ip_csum_fold (sum0);
1413 if (nat44_set_tcp_session_state_i2o
1414 (sm, now, s0, b0, thread_index))
1417 else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
1420 new_port0 = udp0->src_port = s0->out2in.port;
1421 sum0 = udp0->checksum;
1423 ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1426 ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
1428 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1430 sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
1431 s0->ext_host_addr.as_u32,
1432 ip4_header_t, dst_address);
1434 ip_csum_update (sum0,
1435 vnet_buffer (b0)->ip.reass.l4_dst_port,
1436 s0->ext_host_port, ip4_header_t, length);
1437 udp0->dst_port = s0->ext_host_port;
1438 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1440 udp0->checksum = ip_csum_fold (sum0);
1445 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1447 new_port0 = udp0->src_port = s0->out2in.port;
1448 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1450 udp0->dst_port = s0->ext_host_port;
1451 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1458 nat44_session_update_counters (s0, now,
1459 vlib_buffer_length_in_chain
1460 (vm, b0), thread_index);
1461 /* Per-user LRU list maintenance */
1462 nat44_session_update_lru (sm, s0, thread_index);
1465 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
1466 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
1468 nat_in2out_ed_trace_t *t =
1469 vlib_add_trace (vm, node, b0, sizeof (*t));
1470 t->sw_if_index = sw_if_index0;
1471 t->next_index = next0;
1472 t->is_slow_path = 1;
1475 t->session_index = s0 - tsm->sessions;
1477 t->session_index = ~0;
1480 pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next;
1482 /* verify speculative enqueue, maybe switch current next frame */
1483 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1484 to_next, n_left_to_next,
1488 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1491 vlib_node_increment_counter (vm, stats_node_index,
1492 NAT_IN2OUT_ED_ERROR_IN2OUT_PACKETS,
1494 vlib_node_increment_counter (vm, stats_node_index,
1495 NAT_IN2OUT_ED_ERROR_TCP_PACKETS, tcp_packets);
1496 vlib_node_increment_counter (vm, stats_node_index,
1497 NAT_IN2OUT_ED_ERROR_UDP_PACKETS, udp_packets);
1498 vlib_node_increment_counter (vm, stats_node_index,
1499 NAT_IN2OUT_ED_ERROR_ICMP_PACKETS,
1501 vlib_node_increment_counter (vm, stats_node_index,
1502 NAT_IN2OUT_ED_ERROR_OTHER_PACKETS,
1504 return frame->n_vectors;
1507 VLIB_NODE_FN (nat44_ed_in2out_node) (vlib_main_t * vm,
1508 vlib_node_runtime_t * node,
1509 vlib_frame_t * frame)
1511 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 0);
1515 VLIB_REGISTER_NODE (nat44_ed_in2out_node) = {
1516 .name = "nat44-ed-in2out",
1517 .vector_size = sizeof (u32),
1518 .sibling_of = "nat-default",
1519 .format_trace = format_nat_in2out_ed_trace,
1520 .type = VLIB_NODE_TYPE_INTERNAL,
1521 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1522 .error_strings = nat_in2out_ed_error_strings,
1523 .runtime_data_bytes = sizeof (snat_runtime_t),
1527 VLIB_NODE_FN (nat44_ed_in2out_output_node) (vlib_main_t * vm,
1528 vlib_node_runtime_t * node,
1529 vlib_frame_t * frame)
1531 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 1);
1535 VLIB_REGISTER_NODE (nat44_ed_in2out_output_node) = {
1536 .name = "nat44-ed-in2out-output",
1537 .vector_size = sizeof (u32),
1538 .sibling_of = "nat-default",
1539 .format_trace = format_nat_in2out_ed_trace,
1540 .type = VLIB_NODE_TYPE_INTERNAL,
1541 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1542 .error_strings = nat_in2out_ed_error_strings,
1543 .runtime_data_bytes = sizeof (snat_runtime_t),
1547 VLIB_NODE_FN (nat44_ed_in2out_slowpath_node) (vlib_main_t * vm,
1548 vlib_node_runtime_t *
1549 node, vlib_frame_t * frame)
1551 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 0);
1555 VLIB_REGISTER_NODE (nat44_ed_in2out_slowpath_node) = {
1556 .name = "nat44-ed-in2out-slowpath",
1557 .vector_size = sizeof (u32),
1558 .sibling_of = "nat-default",
1559 .format_trace = format_nat_in2out_ed_trace,
1560 .type = VLIB_NODE_TYPE_INTERNAL,
1561 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1562 .error_strings = nat_in2out_ed_error_strings,
1563 .runtime_data_bytes = sizeof (snat_runtime_t),
1567 VLIB_NODE_FN (nat44_ed_in2out_output_slowpath_node) (vlib_main_t * vm,
1570 vlib_frame_t * frame)
1572 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 1);
1576 VLIB_REGISTER_NODE (nat44_ed_in2out_output_slowpath_node) = {
1577 .name = "nat44-ed-in2out-output-slowpath",
1578 .vector_size = sizeof (u32),
1579 .sibling_of = "nat-default",
1580 .format_trace = format_nat_in2out_ed_trace,
1581 .type = VLIB_NODE_TYPE_INTERNAL,
1582 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1583 .error_strings = nat_in2out_ed_error_strings,
1584 .runtime_data_bytes = sizeof (snat_runtime_t),
1589 format_nat_pre_trace (u8 * s, va_list * args)
1591 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1592 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1593 nat_pre_trace_t *t = va_arg (*args, nat_pre_trace_t *);
1594 return format (s, "in2out next_index %d arc_next_index %d", t->next_index,
1598 VLIB_NODE_FN (nat_pre_in2out_node)
1599 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1601 return nat_pre_node_fn_inline (vm, node, frame,
1602 NAT_NEXT_IN2OUT_ED_FAST_PATH);
1606 VLIB_REGISTER_NODE (nat_pre_in2out_node) = {
1607 .name = "nat-pre-in2out",
1608 .vector_size = sizeof (u32),
1609 .sibling_of = "nat-default",
1610 .format_trace = format_nat_pre_trace,
1611 .type = VLIB_NODE_TYPE_INTERNAL,
1617 * fd.io coding-style-patch-verification: ON
1620 * eval: (c-set-style "gnu")