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 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
174 next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
175 next0, thread_index, p_s0, 0);
176 snat_session_t *s0 = *p_s0;
177 if (PREDICT_TRUE (next0 != NAT_NEXT_DROP && s0))
180 nat44_session_update_counters (s0, now,
181 vlib_buffer_length_in_chain
182 (tsm->vlib_main, b0), thread_index);
183 /* Per-user LRU list maintenance */
184 nat44_session_update_lru (sm, s0, thread_index);
189 static_always_inline u16
190 snat_random_port (u16 min, u16 max)
192 snat_main_t *sm = &snat_main;
193 return min + random_u32 (&sm->random_seed) /
194 (random_u32_max () / (max - min + 1) + 1);
198 nat_ed_alloc_addr_and_port (snat_main_t * sm, u32 rx_fib_index,
199 u32 snat_proto, u32 thread_index,
200 ip4_address_t r_addr, u16 r_port, u8 proto,
201 u16 port_per_thread, u32 snat_thread_index,
203 ip4_address_t * allocated_addr,
204 u16 * allocated_port,
205 clib_bihash_kv_16_8_t * out2in_ed_kv)
208 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 SNAT_PROTOCOL_##N: \
221 if (a->fib_index == rx_fib_index) \
223 u16 port = snat_random_port (1, port_per_thread); \
224 u16 attempts = port_per_thread; \
225 while (attempts > 0) \
228 portnum = port_thread_offset + port; \
229 make_ed_kv (&a->addr, &r_addr, proto, s->out2in.fib_index, \
230 clib_host_to_net_u16 (portnum), r_port, \
231 s - tsm->sessions, out2in_ed_kv); \
232 int rv = clib_bihash_add_del_16_8 (&tsm->out2in_ed, out2in_ed_kv, \
236 ++a->busy_##n##_port_refcounts[portnum]; \
237 a->busy_##n##_ports_per_thread[thread_index]++; \
238 a->busy_##n##_ports++; \
239 *allocated_addr = a->addr; \
240 *allocated_port = clib_host_to_net_u16 (portnum); \
243 port = (port + 1) % port_per_thread; \
246 else if (a->fib_index == ~0) \
252 foreach_snat_protocol;
254 nat_elog_info ("unknown protocol");
261 /* fake fib_index to reuse macro */
266 foreach_snat_protocol;
268 nat_elog_info ("unknown protocol");
275 /* Totally out of translations to use... */
276 snat_ipfix_logging_addresses_exhausted (thread_index, 0);
281 slow_path_ed (snat_main_t * sm,
283 ip4_address_t l_addr,
284 ip4_address_t r_addr,
289 snat_session_t ** sessionp,
290 vlib_node_runtime_t * node, u32 next, u32 thread_index, f64 now)
292 snat_session_t *s = NULL;
293 snat_session_key_t key0, key1;
294 lb_nat_type_t lb = 0;
295 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
296 u32 snat_proto = ip_proto_to_snat_proto (proto);
297 nat_outside_fib_t *outside_fib;
298 fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
299 clib_bihash_kv_16_8_t out2in_ed_kv;
300 ip4_address_t allocated_addr;
304 .fp_proto = FIB_PROTOCOL_IP4,
306 .fp_addr = {.ip4.as_u32 = r_addr.as_u32,},
308 nat44_is_idle_session_ctx_t ctx;
310 if (PREDICT_TRUE (snat_proto == SNAT_PROTOCOL_TCP))
314 (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
316 b->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
317 return NAT_NEXT_DROP;
321 // TODO: based on fib index do a lookup
323 (nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index)))
325 if (!nat_global_lru_free_one (sm, thread_index, now))
327 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
328 nat_ipfix_logging_max_sessions (thread_index, sm->max_translations);
329 nat_elog_notice ("maximum sessions exceeded");
330 return NAT_NEXT_DROP;
336 key1.protocol = key0.protocol = snat_proto;
337 key0.fib_index = rx_fib_index;
338 key1.fib_index = sm->outside_fib_index;
340 /* First try to match static mapping by local address and port */
341 if (snat_static_mapping_match
342 (sm, key0, &key1, 0, 0, 0, &lb, 0, &identity_nat))
344 s = nat_ed_session_alloc (sm, thread_index, now);
347 nat_elog_warn ("create NAT session failed");
348 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
349 return NAT_NEXT_DROP;
351 switch (vec_len (sm->outside_fibs))
354 s->out2in.fib_index = sm->outside_fib_index;
357 s->out2in.fib_index = sm->outside_fibs[0].fib_index;
361 vec_foreach (outside_fib, sm->outside_fibs)
363 fei = fib_table_lookup (outside_fib->fib_index, &pfx);
364 if (FIB_NODE_INDEX_INVALID != fei)
366 if (fib_entry_get_resolving_interface (fei) != ~0)
368 s->out2in.fib_index = outside_fib->fib_index;
377 /* Try to create dynamic translation */
378 if (nat_ed_alloc_addr_and_port (sm, rx_fib_index, snat_proto,
379 thread_index, r_addr, r_port, proto,
381 tsm->snat_thread_index, s,
383 &allocated_port, &out2in_ed_kv))
385 nat_elog_notice ("addresses exhausted");
386 b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS];
387 nat_free_session_data (sm, s, thread_index, 0);
388 nat44_ed_delete_session (sm, s, thread_index, 1);
389 return NAT_NEXT_DROP;
391 key1.addr = allocated_addr;
392 key1.port = allocated_port;
396 if (PREDICT_FALSE (identity_nat))
401 s = nat_ed_session_alloc (sm, thread_index, now);
404 nat_elog_warn ("create NAT session failed");
405 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
406 return NAT_NEXT_DROP;
408 switch (vec_len (sm->outside_fibs))
411 s->out2in.fib_index = sm->outside_fib_index;
414 s->out2in.fib_index = sm->outside_fibs[0].fib_index;
418 vec_foreach (outside_fib, sm->outside_fibs)
420 fei = fib_table_lookup (outside_fib->fib_index, &pfx);
421 if (FIB_NODE_INDEX_INVALID != fei)
423 if (fib_entry_get_resolving_interface (fei) != ~0)
425 s->out2in.fib_index = outside_fib->fib_index;
434 s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
437 make_ed_kv (&key1.addr, &r_addr, proto,
438 s->out2in.fib_index, key1.port, r_port, s - tsm->sessions,
440 if (clib_bihash_add_or_overwrite_stale_16_8
441 (&tsm->out2in_ed, &out2in_ed_kv, nat44_o2i_ed_is_idle_session_cb,
443 nat_elog_notice ("out2in-ed key add failed");
447 s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING;
448 s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
449 s->ext_host_addr = r_addr;
450 s->ext_host_port = r_port;
453 s->out2in.protocol = key0.protocol;
455 clib_bihash_kv_16_8_t in2out_ed_kv;
456 make_ed_kv (&l_addr, &r_addr, proto, rx_fib_index, l_port, r_port,
457 s - tsm->sessions, &in2out_ed_kv);
459 ctx.thread_index = thread_index;
460 if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, &in2out_ed_kv,
461 nat44_i2o_ed_is_idle_session_cb,
463 nat_elog_notice ("in2out-ed key add failed");
468 snat_ipfix_logging_nat44_ses_create (thread_index,
469 s->in2out.addr.as_u32,
470 s->out2in.addr.as_u32,
473 s->out2in.port, s->in2out.fib_index);
475 nat_syslog_nat44_sadd (s->user_index, s->in2out.fib_index,
476 &s->in2out.addr, s->in2out.port,
477 &s->ext_host_nat_addr, s->ext_host_nat_port,
478 &s->out2in.addr, s->out2in.port,
479 &s->ext_host_addr, s->ext_host_port,
480 s->in2out.protocol, 0);
482 nat_ha_sadd (&s->in2out.addr, s->in2out.port, &s->out2in.addr,
483 s->out2in.port, &s->ext_host_addr, s->ext_host_port,
484 &s->ext_host_nat_addr, s->ext_host_nat_port,
485 s->in2out.protocol, s->in2out.fib_index, s->flags,
491 static_always_inline int
492 nat44_ed_not_translate (snat_main_t * sm, vlib_node_runtime_t * node,
493 u32 sw_if_index, ip4_header_t * ip, u32 proto,
494 u32 rx_fib_index, u32 thread_index)
496 udp_header_t *udp = ip4_next_header (ip);
497 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
498 clib_bihash_kv_16_8_t kv, value;
499 snat_session_key_t key0, key1;
501 make_ed_kv (&ip->dst_address, &ip->src_address, ip->protocol,
502 sm->outside_fib_index, udp->dst_port, udp->src_port, ~0ULL,
505 /* NAT packet aimed at external address if has active sessions */
506 if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
508 key0.addr = ip->dst_address;
509 key0.port = udp->dst_port;
510 key0.protocol = proto;
511 key0.fib_index = sm->outside_fib_index;
512 /* or is static mappings */
513 if (!snat_static_mapping_match (sm, key0, &key1, 1, 0, 0, 0, 0, 0))
519 if (sm->forwarding_enabled)
522 return snat_not_translate_fast (sm, node, sw_if_index, ip, proto,
526 static_always_inline int
527 nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip,
528 u32 thread_index, f64 now,
529 vlib_main_t * vm, vlib_buffer_t * b)
531 clib_bihash_kv_16_8_t kv, value;
532 snat_session_t *s = 0;
533 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
535 if (!sm->forwarding_enabled)
538 if (ip->protocol == IP_PROTOCOL_ICMP)
540 if (get_icmp_i2o_ed_key (b, ip, 0, ~0ULL, 0, 0, 0, &kv))
543 else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
545 make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol, 0,
546 vnet_buffer (b)->ip.reass.l4_src_port,
547 vnet_buffer (b)->ip.reass.l4_dst_port, ~0ULL, &kv);
551 make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol, 0, 0,
555 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
557 s = pool_elt_at_index (tsm->sessions, value.value);
558 if (is_fwd_bypass_session (s))
560 if (ip->protocol == IP_PROTOCOL_TCP)
562 if (nat44_set_tcp_session_state_i2o
563 (sm, now, s, b, thread_index))
567 nat44_session_update_counters (s, now,
568 vlib_buffer_length_in_chain (vm, b),
570 /* Per-user LRU list maintenance */
571 nat44_session_update_lru (sm, s, thread_index);
581 static_always_inline int
582 nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip,
583 u16 src_port, u16 dst_port,
584 u32 thread_index, u32 rx_sw_if_index,
587 clib_bihash_kv_16_8_t kv, value;
588 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
591 u32 rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (rx_sw_if_index);
592 u32 tx_fib_index = ip4_fib_table_get_index_for_sw_if_index (tx_sw_if_index);
595 make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol,
596 tx_fib_index, src_port, dst_port, ~0ULL, &kv);
597 if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
599 s = pool_elt_at_index (tsm->sessions, value.value);
600 if (nat44_is_ses_closed (s))
602 nat_free_session_data (sm, s, thread_index, 0);
603 nat44_ed_delete_session (sm, s, thread_index, 1);
606 s->flags |= SNAT_SESSION_FLAG_OUTPUT_FEATURE;
611 make_ed_kv (&ip->dst_address, &ip->src_address, ip->protocol,
612 rx_fib_index, dst_port, src_port, ~0ULL, &kv);
613 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
615 s = pool_elt_at_index (tsm->sessions, value.value);
616 if (is_fwd_bypass_session (s))
621 pool_foreach (i, sm->output_feature_interfaces,
623 if ((nat_interface_is_inside (i)) && (rx_sw_if_index == i->sw_if_index))
633 #ifndef CLIB_MARCH_VARIANT
635 icmp_match_in2out_ed (snat_main_t * sm, vlib_node_runtime_t * node,
636 u32 thread_index, vlib_buffer_t * b, ip4_header_t * ip,
637 u8 * p_proto, snat_session_key_t * p_value,
638 u8 * p_dont_translate, void *d, void *e)
642 snat_session_t *s = 0;
643 u8 dont_translate = 0;
644 clib_bihash_kv_16_8_t kv, value;
647 u16 l_port = 0, r_port = 0; // initialize to workaround gcc warning
648 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
650 sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
651 rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
654 get_icmp_i2o_ed_key (b, ip, rx_fib_index, ~0ULL, p_proto, &l_port,
658 b->error = node->errors[err];
659 next = NAT_NEXT_DROP;
663 if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
665 if (vnet_buffer (b)->sw_if_index[VLIB_TX] != ~0)
668 (nat44_ed_not_translate_output_feature
669 (sm, ip, l_port, r_port, thread_index,
670 sw_if_index, vnet_buffer (b)->sw_if_index[VLIB_TX])))
678 if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, sw_if_index,
679 ip, SNAT_PROTOCOL_ICMP,
689 (icmp_type_is_error_message
690 (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
692 b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
693 next = NAT_NEXT_DROP;
698 slow_path_ed (sm, b, ip->src_address, ip->dst_address, l_port, r_port,
699 ip->protocol, rx_fib_index, &s, node, next,
700 thread_index, vlib_time_now (tsm->vlib_main));
702 if (PREDICT_FALSE (next == NAT_NEXT_DROP))
714 (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
716 && vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
718 && !icmp_type_is_error_message (vnet_buffer (b)->ip.
719 reass.icmp_type_or_tcp_flags)))
721 b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
722 next = NAT_NEXT_DROP;
726 s = pool_elt_at_index (tsm->sessions, value.value);
730 *p_value = s->out2in;
731 *p_dont_translate = dont_translate;
733 *(snat_session_t **) d = s;
738 static snat_session_t *
739 nat44_ed_in2out_unknown_proto (snat_main_t * sm,
745 vlib_main_t * vm, vlib_node_runtime_t * node)
747 clib_bihash_kv_8_8_t kv, value;
748 clib_bihash_kv_16_8_t s_kv, s_value;
749 snat_static_mapping_t *m;
750 u32 old_addr, new_addr = 0;
752 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
754 u32 outside_fib_index = sm->outside_fib_index;
757 nat_outside_fib_t *outside_fib;
758 fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
760 .fp_proto = FIB_PROTOCOL_IP4,
763 .ip4.as_u32 = ip->dst_address.as_u32,
767 switch (vec_len (sm->outside_fibs))
770 outside_fib_index = sm->outside_fib_index;
773 outside_fib_index = sm->outside_fibs[0].fib_index;
777 vec_foreach (outside_fib, sm->outside_fibs)
779 fei = fib_table_lookup (outside_fib->fib_index, &pfx);
780 if (FIB_NODE_INDEX_INVALID != fei)
782 if (fib_entry_get_resolving_interface (fei) != ~0)
784 outside_fib_index = outside_fib->fib_index;
792 old_addr = ip->src_address.as_u32;
794 make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol,
795 rx_fib_index, 0, 0, ~0ULL, &s_kv);
797 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &s_kv, &s_value))
799 s = pool_elt_at_index (tsm->sessions, s_value.value);
800 new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
805 (nat44_ed_maximum_sessions_exceeded
806 (sm, rx_fib_index, thread_index)))
808 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
809 nat_ipfix_logging_max_sessions (thread_index, sm->max_translations);
810 nat_elog_notice ("maximum sessions exceeded");
814 make_sm_kv (&kv, &ip->src_address, 0, rx_fib_index, 0);
816 /* Try to find static mapping first */
817 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value))
819 m = pool_elt_at_index (sm->static_mappings, value.value);
820 new_addr = ip->src_address.as_u32 = m->external_addr.as_u32;
827 pool_foreach (s, tsm->sessions, {
828 if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32)
830 new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
832 make_ed_kv (&s->out2in.addr, &ip->dst_address, ip->protocol,
833 outside_fib_index, 0, 0, ~0ULL, &s_kv);
834 if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
842 for (i = 0; i < vec_len (sm->addresses); i++)
844 make_ed_kv (&sm->addresses[i].addr, &ip->dst_address,
845 ip->protocol, outside_fib_index, 0, 0, ~0ULL,
847 if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
849 new_addr = ip->src_address.as_u32 =
850 sm->addresses[i].addr.as_u32;
858 s = nat_ed_session_alloc (sm, thread_index, now);
861 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
862 nat_elog_warn ("create NAT session failed");
866 s->ext_host_addr.as_u32 = ip->dst_address.as_u32;
867 s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
868 s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
869 s->out2in.addr.as_u32 = new_addr;
870 s->out2in.fib_index = outside_fib_index;
871 s->in2out.addr.as_u32 = old_addr;
872 s->in2out.fib_index = rx_fib_index;
873 s->in2out.port = s->out2in.port = ip->protocol;
875 s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
877 /* Add to lookup tables */
878 make_ed_kv (&s->in2out.addr, &ip->dst_address, ip->protocol,
879 rx_fib_index, 0, 0, s - tsm->sessions, &s_kv);
880 if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1))
881 nat_elog_notice ("in2out key add failed");
883 make_ed_kv (&s->out2in.addr, &ip->dst_address, ip->protocol,
884 outside_fib_index, 0, 0, s - tsm->sessions, &s_kv);
885 if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &s_kv, 1))
886 nat_elog_notice ("out2in key add failed");
889 /* Update IP checksum */
891 sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address);
892 ip->checksum = ip_csum_fold (sum);
895 nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b),
897 /* Per-user LRU list maintenance */
898 nat44_session_update_lru (sm, s, thread_index);
901 if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
902 nat44_ed_hairpinning_unknown_proto (sm, b, ip);
904 if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
905 vnet_buffer (b)->sw_if_index[VLIB_TX] = outside_fib_index;
911 nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm,
912 vlib_node_runtime_t * node,
913 vlib_frame_t * frame,
914 int is_output_feature)
916 u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
917 nat_next_t next_index;
918 snat_main_t *sm = &snat_main;
919 f64 now = vlib_time_now (vm);
920 u32 thread_index = vm->thread_index;
921 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
922 u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets =
925 def_slow = is_output_feature ? NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH :
926 NAT_NEXT_IN2OUT_ED_SLOW_PATH;
928 stats_node_index = sm->ed_in2out_node_index;
930 from = vlib_frame_vector_args (frame);
931 n_left_from = frame->n_vectors;
932 next_index = node->cached_next_index;
934 while (n_left_from > 0)
938 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
940 while (n_left_from > 0 && n_left_to_next > 0)
944 u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0,
945 new_addr0, old_addr0;
946 u16 old_port0, new_port0;
950 snat_session_t *s0 = 0;
951 clib_bihash_kv_16_8_t kv0, value0;
954 /* speculatively enqueue b0 to the current next frame */
962 b0 = vlib_get_buffer (vm, bi0);
964 if (is_output_feature)
966 vnet_feature_next (&vnet_buffer2 (b0)->nat.arc_next, b0);
967 iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
970 next0 = vnet_buffer2 (b0)->nat.arc_next;
972 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
975 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
977 fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
980 if (PREDICT_FALSE (ip0->ttl == 1))
982 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
983 icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
984 ICMP4_time_exceeded_ttl_exceeded_in_transit,
986 next0 = NAT_NEXT_ICMP_ERROR;
990 udp0 = ip4_next_header (ip0);
991 tcp0 = (tcp_header_t *) udp0;
992 proto0 = ip_proto_to_snat_proto (ip0->protocol);
994 if (PREDICT_FALSE (proto0 == ~0))
1000 if (is_output_feature)
1002 if (PREDICT_FALSE (nat_not_translate_output_feature_fwd
1003 (sm, ip0, thread_index, now, vm, b0)))
1007 if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
1013 make_ed_kv (&ip0->src_address, &ip0->dst_address,
1014 ip0->protocol, rx_fib_index0,
1015 vnet_buffer (b0)->ip.reass.l4_src_port,
1016 vnet_buffer (b0)->ip.reass.l4_dst_port, ~0ULL, &kv0);
1018 // lookup for session
1019 if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
1021 // session does not exist go slow path
1025 s0 = pool_elt_at_index (tsm->sessions, value0.value);
1027 if (s0->tcp_close_timestamp)
1029 if (now >= s0->tcp_close_timestamp)
1031 // session is closed, go slow path
1036 // session in transitory timeout, drop
1037 b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TCP_CLOSED];
1038 next0 = NAT_NEXT_DROP;
1043 // drop if session expired
1044 u64 sess_timeout_time;
1045 sess_timeout_time = s0->last_heard +
1046 (f64) nat44_session_get_timeout (sm, s0);
1047 if (now >= sess_timeout_time)
1049 nat_free_session_data (sm, s0, thread_index, 0);
1050 nat44_ed_delete_session (sm, s0, thread_index, 1);
1051 // session is closed, go slow path
1056 b0->flags |= VNET_BUFFER_F_IS_NATED;
1058 if (!is_output_feature)
1059 vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
1061 old_addr0 = ip0->src_address.as_u32;
1062 new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
1063 sum0 = ip0->checksum;
1064 sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1066 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1067 sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
1068 s0->ext_host_addr.as_u32, ip4_header_t,
1070 ip0->checksum = ip_csum_fold (sum0);
1072 old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
1074 if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
1076 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1078 new_port0 = udp0->src_port = s0->out2in.port;
1079 sum0 = tcp0->checksum;
1081 ip_csum_update (sum0, old_addr0, new_addr0,
1082 ip4_header_t, dst_address);
1084 ip_csum_update (sum0, old_port0, new_port0,
1085 ip4_header_t, length);
1086 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1089 ip_csum_update (sum0, ip0->dst_address.as_u32,
1090 s0->ext_host_addr.as_u32,
1091 ip4_header_t, dst_address);
1093 ip_csum_update (sum0,
1094 vnet_buffer (b0)->ip.
1095 reass.l4_dst_port, s0->ext_host_port,
1096 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, tcp0, &sum0);
1101 tcp0->checksum = ip_csum_fold (sum0);
1104 if (nat44_set_tcp_session_state_i2o
1105 (sm, now, s0, b0, thread_index))
1108 else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
1111 new_port0 = udp0->src_port = s0->out2in.port;
1112 sum0 = udp0->checksum;
1114 ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1117 ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
1119 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1121 sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
1122 s0->ext_host_addr.as_u32,
1123 ip4_header_t, dst_address);
1125 ip_csum_update (sum0,
1126 vnet_buffer (b0)->ip.reass.l4_dst_port,
1127 s0->ext_host_port, ip4_header_t, length);
1128 udp0->dst_port = s0->ext_host_port;
1129 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1131 udp0->checksum = ip_csum_fold (sum0);
1136 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1138 new_port0 = udp0->src_port = s0->out2in.port;
1139 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1141 udp0->dst_port = s0->ext_host_port;
1142 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1149 nat44_session_update_counters (s0, now,
1150 vlib_buffer_length_in_chain
1151 (vm, b0), thread_index);
1152 /* Per-user LRU list maintenance */
1153 nat44_session_update_lru (sm, s0, thread_index);
1156 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
1157 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
1159 nat_in2out_ed_trace_t *t =
1160 vlib_add_trace (vm, node, b0, sizeof (*t));
1161 t->sw_if_index = sw_if_index0;
1162 t->next_index = next0;
1163 t->is_slow_path = 0;
1166 t->session_index = s0 - tsm->sessions;
1168 t->session_index = ~0;
1171 pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next;
1172 /* verify speculative enqueue, maybe switch current next frame */
1173 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1174 to_next, n_left_to_next,
1178 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1181 vlib_node_increment_counter (vm, stats_node_index,
1182 NAT_IN2OUT_ED_ERROR_IN2OUT_PACKETS,
1184 vlib_node_increment_counter (vm, stats_node_index,
1185 NAT_IN2OUT_ED_ERROR_TCP_PACKETS, tcp_packets);
1186 vlib_node_increment_counter (vm, stats_node_index,
1187 NAT_IN2OUT_ED_ERROR_UDP_PACKETS, udp_packets);
1188 vlib_node_increment_counter (vm, stats_node_index,
1189 NAT_IN2OUT_ED_ERROR_ICMP_PACKETS,
1191 vlib_node_increment_counter (vm, stats_node_index,
1192 NAT_IN2OUT_ED_ERROR_OTHER_PACKETS,
1194 return frame->n_vectors;
1198 nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm,
1199 vlib_node_runtime_t * node,
1200 vlib_frame_t * frame,
1201 int is_output_feature)
1203 u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
1204 nat_next_t next_index;
1205 snat_main_t *sm = &snat_main;
1206 f64 now = vlib_time_now (vm);
1207 u32 thread_index = vm->thread_index;
1208 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
1209 u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets = 0;
1211 stats_node_index = sm->ed_in2out_slowpath_node_index;
1213 from = vlib_frame_vector_args (frame);
1214 n_left_from = frame->n_vectors;
1215 next_index = node->cached_next_index;
1217 while (n_left_from > 0)
1221 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1223 while (n_left_from > 0 && n_left_to_next > 0)
1227 u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0,
1228 new_addr0, old_addr0;
1229 u16 old_port0, new_port0;
1233 icmp46_header_t *icmp0;
1234 snat_session_t *s0 = 0;
1235 clib_bihash_kv_16_8_t kv0, value0;
1238 /* speculatively enqueue b0 to the current next frame */
1244 n_left_to_next -= 1;
1246 b0 = vlib_get_buffer (vm, bi0);
1248 if (is_output_feature)
1249 iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
1251 next0 = vnet_buffer2 (b0)->nat.arc_next;
1253 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
1256 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1258 fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
1261 if (PREDICT_FALSE (ip0->ttl == 1))
1263 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1264 icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
1265 ICMP4_time_exceeded_ttl_exceeded_in_transit,
1267 next0 = NAT_NEXT_ICMP_ERROR;
1271 udp0 = ip4_next_header (ip0);
1272 tcp0 = (tcp_header_t *) udp0;
1273 icmp0 = (icmp46_header_t *) udp0;
1274 proto0 = ip_proto_to_snat_proto (ip0->protocol);
1276 if (PREDICT_FALSE (proto0 == ~0))
1278 s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0,
1283 next0 = NAT_NEXT_DROP;
1289 if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
1291 next0 = icmp_in2out_ed_slow_path
1292 (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0,
1293 node, next0, now, thread_index, &s0);
1299 make_ed_kv (&ip0->src_address, &ip0->dst_address,
1300 ip0->protocol, rx_fib_index0,
1301 vnet_buffer (b0)->ip.reass.l4_src_port,
1302 vnet_buffer (b0)->ip.reass.l4_dst_port, ~0ULL, &kv0);
1304 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
1306 s0 = pool_elt_at_index (tsm->sessions, value0.value);
1308 if (s0->tcp_close_timestamp && now >= s0->tcp_close_timestamp)
1310 nat_free_session_data (sm, s0, thread_index, 0);
1311 nat44_ed_delete_session (sm, s0, thread_index, 1);
1318 if (is_output_feature)
1321 (nat44_ed_not_translate_output_feature
1322 (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port,
1323 vnet_buffer (b0)->ip.reass.l4_dst_port, thread_index,
1325 vnet_buffer (b0)->sw_if_index[VLIB_TX])))
1329 * Send DHCP packets to the ipv4 stack, or we won't
1330 * be able to use dhcp client on the outside interface
1333 (proto0 == SNAT_PROTOCOL_UDP
1334 && (vnet_buffer (b0)->ip.reass.l4_dst_port ==
1335 clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_server))
1336 && ip0->dst_address.as_u32 == 0xffffffff))
1342 (nat44_ed_not_translate
1343 (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0,
1349 slow_path_ed (sm, b0, ip0->src_address, ip0->dst_address,
1350 vnet_buffer (b0)->ip.reass.l4_src_port,
1351 vnet_buffer (b0)->ip.reass.l4_dst_port,
1352 ip0->protocol, rx_fib_index0, &s0, node, next0,
1355 if (PREDICT_FALSE (next0 == NAT_NEXT_DROP))
1358 if (PREDICT_FALSE (!s0))
1363 b0->flags |= VNET_BUFFER_F_IS_NATED;
1365 if (!is_output_feature)
1366 vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
1368 old_addr0 = ip0->src_address.as_u32;
1369 new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
1370 sum0 = ip0->checksum;
1371 sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1373 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1374 sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
1375 s0->ext_host_addr.as_u32, ip4_header_t,
1377 ip0->checksum = ip_csum_fold (sum0);
1379 old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
1381 if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
1383 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1385 new_port0 = udp0->src_port = s0->out2in.port;
1386 sum0 = tcp0->checksum;
1388 ip_csum_update (sum0, old_addr0, new_addr0,
1389 ip4_header_t, dst_address);
1391 ip_csum_update (sum0, old_port0, new_port0,
1392 ip4_header_t, length);
1393 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1396 ip_csum_update (sum0, ip0->dst_address.as_u32,
1397 s0->ext_host_addr.as_u32,
1398 ip4_header_t, dst_address);
1400 ip_csum_update (sum0,
1401 vnet_buffer (b0)->ip.
1402 reass.l4_dst_port, s0->ext_host_port,
1403 ip4_header_t, length);
1404 tcp0->dst_port = s0->ext_host_port;
1405 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1407 mss_clamping (sm, tcp0, &sum0);
1408 tcp0->checksum = ip_csum_fold (sum0);
1411 if (nat44_set_tcp_session_state_i2o
1412 (sm, now, s0, b0, thread_index))
1415 else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
1418 new_port0 = udp0->src_port = s0->out2in.port;
1419 sum0 = udp0->checksum;
1421 ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1424 ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
1426 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1428 sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
1429 s0->ext_host_addr.as_u32,
1430 ip4_header_t, dst_address);
1432 ip_csum_update (sum0,
1433 vnet_buffer (b0)->ip.reass.l4_dst_port,
1434 s0->ext_host_port, ip4_header_t, length);
1435 udp0->dst_port = s0->ext_host_port;
1436 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1438 udp0->checksum = ip_csum_fold (sum0);
1443 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1445 new_port0 = udp0->src_port = s0->out2in.port;
1446 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1448 udp0->dst_port = s0->ext_host_port;
1449 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1456 nat44_session_update_counters (s0, now,
1457 vlib_buffer_length_in_chain
1458 (vm, b0), thread_index);
1459 /* Per-user LRU list maintenance */
1460 nat44_session_update_lru (sm, s0, thread_index);
1463 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
1464 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
1466 nat_in2out_ed_trace_t *t =
1467 vlib_add_trace (vm, node, b0, sizeof (*t));
1468 t->sw_if_index = sw_if_index0;
1469 t->next_index = next0;
1470 t->is_slow_path = 1;
1473 t->session_index = s0 - tsm->sessions;
1475 t->session_index = ~0;
1478 pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next;
1480 /* verify speculative enqueue, maybe switch current next frame */
1481 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1482 to_next, n_left_to_next,
1486 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1489 vlib_node_increment_counter (vm, stats_node_index,
1490 NAT_IN2OUT_ED_ERROR_IN2OUT_PACKETS,
1492 vlib_node_increment_counter (vm, stats_node_index,
1493 NAT_IN2OUT_ED_ERROR_TCP_PACKETS, tcp_packets);
1494 vlib_node_increment_counter (vm, stats_node_index,
1495 NAT_IN2OUT_ED_ERROR_UDP_PACKETS, udp_packets);
1496 vlib_node_increment_counter (vm, stats_node_index,
1497 NAT_IN2OUT_ED_ERROR_ICMP_PACKETS,
1499 vlib_node_increment_counter (vm, stats_node_index,
1500 NAT_IN2OUT_ED_ERROR_OTHER_PACKETS,
1502 return frame->n_vectors;
1505 VLIB_NODE_FN (nat44_ed_in2out_node) (vlib_main_t * vm,
1506 vlib_node_runtime_t * node,
1507 vlib_frame_t * frame)
1509 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 0);
1513 VLIB_REGISTER_NODE (nat44_ed_in2out_node) = {
1514 .name = "nat44-ed-in2out",
1515 .vector_size = sizeof (u32),
1516 .sibling_of = "nat-default",
1517 .format_trace = format_nat_in2out_ed_trace,
1518 .type = VLIB_NODE_TYPE_INTERNAL,
1519 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1520 .error_strings = nat_in2out_ed_error_strings,
1521 .runtime_data_bytes = sizeof (snat_runtime_t),
1525 VLIB_NODE_FN (nat44_ed_in2out_output_node) (vlib_main_t * vm,
1526 vlib_node_runtime_t * node,
1527 vlib_frame_t * frame)
1529 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 1);
1533 VLIB_REGISTER_NODE (nat44_ed_in2out_output_node) = {
1534 .name = "nat44-ed-in2out-output",
1535 .vector_size = sizeof (u32),
1536 .sibling_of = "nat-default",
1537 .format_trace = format_nat_in2out_ed_trace,
1538 .type = VLIB_NODE_TYPE_INTERNAL,
1539 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1540 .error_strings = nat_in2out_ed_error_strings,
1541 .runtime_data_bytes = sizeof (snat_runtime_t),
1545 VLIB_NODE_FN (nat44_ed_in2out_slowpath_node) (vlib_main_t * vm,
1546 vlib_node_runtime_t *
1547 node, vlib_frame_t * frame)
1549 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 0);
1553 VLIB_REGISTER_NODE (nat44_ed_in2out_slowpath_node) = {
1554 .name = "nat44-ed-in2out-slowpath",
1555 .vector_size = sizeof (u32),
1556 .sibling_of = "nat-default",
1557 .format_trace = format_nat_in2out_ed_trace,
1558 .type = VLIB_NODE_TYPE_INTERNAL,
1559 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1560 .error_strings = nat_in2out_ed_error_strings,
1561 .runtime_data_bytes = sizeof (snat_runtime_t),
1565 VLIB_NODE_FN (nat44_ed_in2out_output_slowpath_node) (vlib_main_t * vm,
1568 vlib_frame_t * frame)
1570 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 1);
1574 VLIB_REGISTER_NODE (nat44_ed_in2out_output_slowpath_node) = {
1575 .name = "nat44-ed-in2out-output-slowpath",
1576 .vector_size = sizeof (u32),
1577 .sibling_of = "nat-default",
1578 .format_trace = format_nat_in2out_ed_trace,
1579 .type = VLIB_NODE_TYPE_INTERNAL,
1580 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1581 .error_strings = nat_in2out_ed_error_strings,
1582 .runtime_data_bytes = sizeof (snat_runtime_t),
1587 format_nat_pre_trace (u8 * s, va_list * args)
1589 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1590 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1591 nat_pre_trace_t *t = va_arg (*args, nat_pre_trace_t *);
1592 return format (s, "in2out next_index %d", t->next_index);
1595 VLIB_NODE_FN (nat_pre_in2out_node)
1596 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1598 return nat_pre_node_fn_inline (vm, node, frame,
1599 NAT_NEXT_IN2OUT_ED_FAST_PATH);
1603 VLIB_REGISTER_NODE (nat_pre_in2out_node) = {
1604 .name = "nat-pre-in2out",
1605 .vector_size = sizeof (u32),
1606 .sibling_of = "nat-default",
1607 .format_trace = format_nat_pre_trace,
1608 .type = VLIB_NODE_TYPE_INTERNAL,
1614 * fd.io coding-style-patch-verification: ON
1617 * eval: (c-set-style "gnu")