FD.io VPP  v19.04.2-12-g66b1689
Vector Packet Processing
nat_inlines.h
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1 /*
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:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
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.
14  */
15 /**
16  * @brief The NAT inline functions
17  */
18 
19 #ifndef __included_nat_inlines_h__
20 #define __included_nat_inlines_h__
21 
22 #include <vnet/fib/ip4_fib.h>
23 #include <nat/nat.h>
24 #include <nat/nat_ha.h>
25 
28 {
29  u32 snat_proto = ~0;
30 
31  snat_proto = (ip_proto == IP_PROTOCOL_UDP) ? SNAT_PROTOCOL_UDP : snat_proto;
32  snat_proto = (ip_proto == IP_PROTOCOL_TCP) ? SNAT_PROTOCOL_TCP : snat_proto;
33  snat_proto =
34  (ip_proto == IP_PROTOCOL_ICMP) ? SNAT_PROTOCOL_ICMP : snat_proto;
35  snat_proto =
36  (ip_proto == IP_PROTOCOL_ICMP6) ? SNAT_PROTOCOL_ICMP : snat_proto;
37 
38  return snat_proto;
39 }
40 
43 {
44  u8 ip_proto = ~0;
45 
46  ip_proto = (snat_proto == SNAT_PROTOCOL_UDP) ? IP_PROTOCOL_UDP : ip_proto;
47  ip_proto = (snat_proto == SNAT_PROTOCOL_TCP) ? IP_PROTOCOL_TCP : ip_proto;
48  ip_proto = (snat_proto == SNAT_PROTOCOL_ICMP) ? IP_PROTOCOL_ICMP : ip_proto;
49 
50  return ip_proto;
51 }
52 
54 icmp_is_error_message (icmp46_header_t * icmp)
55 {
56  switch (icmp->type)
57  {
58  case ICMP4_destination_unreachable:
59  case ICMP4_time_exceeded:
60  case ICMP4_parameter_problem:
61  case ICMP4_source_quench:
62  case ICMP4_redirect:
63  case ICMP4_alternate_host_address:
64  return 1;
65  }
66  return 0;
67 }
68 
71  u32 sw_if_index0, u32 ip4_addr)
72 {
74  ip4_address_t *first_int_addr;
75 
76  if (PREDICT_FALSE (rt->cached_sw_if_index != sw_if_index0))
77  {
78  first_int_addr =
79  ip4_interface_first_address (sm->ip4_main, sw_if_index0,
80  0 /* just want the address */ );
81  rt->cached_sw_if_index = sw_if_index0;
82  if (first_int_addr)
83  rt->cached_ip4_address = first_int_addr->as_u32;
84  else
85  rt->cached_ip4_address = 0;
86  }
87 
88  if (PREDICT_FALSE (ip4_addr == rt->cached_ip4_address))
89  return 1;
90  else
91  return 0;
92 }
93 
96 {
97  if (pool_elts (sm->per_thread_data[thread_index].sessions) >=
98  sm->max_translations)
99  return 1;
100 
101  return 0;
102 }
103 
104 always_inline void
106  vlib_node_runtime_t * node, vlib_error_t * error,
107  u32 next)
108 {
109  u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
110 
111  from = bi_vector;
112  n_left_from = vec_len (bi_vector);
113  next_index = node->cached_next_index;
114  while (n_left_from > 0)
115  {
116  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
117  while (n_left_from > 0 && n_left_to_next > 0)
118  {
119  u32 bi0 = to_next[0] = from[0];
120  from += 1;
121  n_left_from -= 1;
122  to_next += 1;
123  n_left_to_next -= 1;
124  vlib_buffer_t *p0 = vlib_get_buffer (vm, bi0);
125  if (error)
126  p0->error = *error;
127  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
128  n_left_to_next, bi0, next);
129  }
130  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
131  }
132 }
133 
134 always_inline void
136 {
138  {
139  if (is_static)
140  u->nstaticsessions++;
141  else
142  u->nsessions++;
143  }
144 }
145 
146 always_inline void
148  u32 thread_index)
149 {
151  snat_user_key_t u_key;
153  thread_index);
154 
155  if (u->nstaticsessions == 0 && u->nsessions == 0)
156  {
157  u_key.addr.as_u32 = u->addr.as_u32;
158  u_key.fib_index = u->fib_index;
159  kv.key = u_key.as_u64;
161  pool_put (tsm->users, u);
162  clib_bihash_add_del_8_8 (&tsm->user_hash, &kv, 0);
163  vlib_set_simple_counter (&sm->total_users, thread_index, 0,
164  pool_elts (tsm->users));
165  }
166 }
167 
168 always_inline void
169 nat44_delete_session (snat_main_t * sm, snat_session_t * ses,
170  u32 thread_index)
171 {
173  thread_index);
174  clib_bihash_kv_8_8_t kv, value;
175  snat_user_key_t u_key;
176  snat_user_t *u;
177 
178  nat_log_debug ("session deleted %U", format_snat_session, tsm, ses);
179 
180  clib_dlist_remove (tsm->list_pool, ses->per_user_index);
181  pool_put_index (tsm->list_pool, ses->per_user_index);
182  pool_put (tsm->sessions, ses);
183  vlib_set_simple_counter (&sm->total_sessions, thread_index, 0,
184  pool_elts (tsm->sessions));
185 
186  u_key.addr = ses->in2out.addr;
187  u_key.fib_index = ses->in2out.fib_index;
188  kv.key = u_key.as_u64;
189  if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
190  {
191  u = pool_elt_at_index (tsm->users, value.value);
192  if (snat_is_session_static (ses))
193  u->nstaticsessions--;
194  else
195  u->nsessions--;
196 
197  nat44_delete_user_with_no_session (sm, u, thread_index);
198  }
199 }
200 
201 /** \brief Set TCP session state.
202  @return 1 if session was closed, otherwise 0
203 */
204 always_inline int
205 nat44_set_tcp_session_state_i2o (snat_main_t * sm, snat_session_t * ses,
206  tcp_header_t * tcp, u32 thread_index)
207 {
208  if ((ses->state == 0) && (tcp->flags & TCP_FLAG_RST))
209  ses->state = NAT44_SES_RST;
210  if ((ses->state == NAT44_SES_RST) && !(tcp->flags & TCP_FLAG_RST))
211  ses->state = 0;
212  if ((tcp->flags & TCP_FLAG_ACK) && (ses->state & NAT44_SES_I2O_SYN) &&
213  (ses->state & NAT44_SES_O2I_SYN))
214  ses->state = 0;
215  if (tcp->flags & TCP_FLAG_SYN)
216  ses->state |= NAT44_SES_I2O_SYN;
217  if (tcp->flags & TCP_FLAG_FIN)
218  {
219  ses->i2o_fin_seq = clib_net_to_host_u32 (tcp->seq_number);
220  ses->state |= NAT44_SES_I2O_FIN;
221  }
222  if ((tcp->flags & TCP_FLAG_ACK) && (ses->state & NAT44_SES_O2I_FIN))
223  {
224  if (clib_net_to_host_u32 (tcp->ack_number) > ses->o2i_fin_seq)
225  ses->state |= NAT44_SES_O2I_FIN_ACK;
226  }
227  if (nat44_is_ses_closed (ses)
228  && !(ses->flags & SNAT_SESSION_FLAG_OUTPUT_FEATURE))
229  {
230  nat_log_debug ("TCP close connection %U", format_snat_session,
231  &sm->per_thread_data[thread_index], ses);
232  nat_free_session_data (sm, ses, thread_index, 0);
233  nat44_delete_session (sm, ses, thread_index);
234  return 1;
235  }
236  return 0;
237 }
238 
239 always_inline int
240 nat44_set_tcp_session_state_o2i (snat_main_t * sm, snat_session_t * ses,
241  tcp_header_t * tcp, u32 thread_index)
242 {
243  if ((ses->state == 0) && (tcp->flags & TCP_FLAG_RST))
244  ses->state = NAT44_SES_RST;
245  if ((ses->state == NAT44_SES_RST) && !(tcp->flags & TCP_FLAG_RST))
246  ses->state = 0;
247  if ((tcp->flags & TCP_FLAG_ACK) && (ses->state & NAT44_SES_I2O_SYN) &&
248  (ses->state & NAT44_SES_O2I_SYN))
249  ses->state = 0;
250  if (tcp->flags & TCP_FLAG_SYN)
251  ses->state |= NAT44_SES_O2I_SYN;
252  if (tcp->flags & TCP_FLAG_FIN)
253  {
254  ses->o2i_fin_seq = clib_net_to_host_u32 (tcp->seq_number);
255  ses->state |= NAT44_SES_O2I_FIN;
256  }
257  if ((tcp->flags & TCP_FLAG_ACK) && (ses->state & NAT44_SES_I2O_FIN))
258  {
259  if (clib_net_to_host_u32 (tcp->ack_number) > ses->i2o_fin_seq)
260  ses->state |= NAT44_SES_I2O_FIN_ACK;
261  }
262  if (nat44_is_ses_closed (ses))
263  {
264  nat_log_debug ("TCP close connection %U", format_snat_session,
265  &sm->per_thread_data[thread_index], ses);
266  nat_free_session_data (sm, ses, thread_index, 0);
267  nat44_delete_session (sm, ses, thread_index);
268  return 1;
269  }
270  return 0;
271 }
272 
274 nat44_session_get_timeout (snat_main_t * sm, snat_session_t * s)
275 {
276  switch (s->in2out.protocol)
277  {
278  case SNAT_PROTOCOL_ICMP:
279  return sm->icmp_timeout;
280  case SNAT_PROTOCOL_UDP:
281  return sm->udp_timeout;
282  case SNAT_PROTOCOL_TCP:
283  {
284  if (s->state)
285  return sm->tcp_transitory_timeout;
286  else
287  return sm->tcp_established_timeout;
288  }
289  default:
290  return sm->udp_timeout;
291  }
292 
293  return 0;
294 }
295 
296 always_inline void
297 nat44_session_update_counters (snat_session_t * s, f64 now, uword bytes,
298  u32 thread_index)
299 {
300  s->last_heard = now;
301  s->total_pkts++;
302  s->total_bytes += bytes;
303  nat_ha_sref (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
304  s->ext_host_port, s->out2in.protocol, s->out2in.fib_index,
305  s->total_pkts, s->total_bytes, thread_index,
306  &s->ha_last_refreshed, now);
307 }
308 
309 /** \brief Per-user LRU list maintenance */
310 always_inline void
311 nat44_session_update_lru (snat_main_t * sm, snat_session_t * s,
312  u32 thread_index)
313 {
314  clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
315  s->per_user_index);
316  clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
317  s->per_user_list_head_index, s->per_user_index);
318 }
319 
320 always_inline void
322  ip4_address_t * r_addr, u8 proto, u32 fib_index, u16 l_port,
323  u16 r_port)
324 {
326 
327  key->l_addr.as_u32 = l_addr->as_u32;
328  key->r_addr.as_u32 = r_addr->as_u32;
329  key->fib_index = fib_index;
330  key->proto = proto;
331  key->l_port = l_port;
332  key->r_port = r_port;
333 
334  kv->value = ~0ULL;
335 }
336 
337 always_inline void
339  u32 fib_index, u16 port)
340 {
342 
343  key.addr.as_u32 = addr->as_u32;
344  key.port = port;
345  key.protocol = proto;
346  key.fib_index = fib_index;
347 
348  kv->key = key.as_u64;
349  kv->value = ~0ULL;
350 }
351 
352 always_inline void
354 {
355  u8 *data;
356  u8 opt_len, opts_len, kind;
357  u16 mss;
358 
359  if (!(sm->mss_clamping && tcp_syn (tcp)))
360  return;
361 
362  opts_len = (tcp_doff (tcp) << 2) - sizeof (tcp_header_t);
363  data = (u8 *) (tcp + 1);
364  for (; opts_len > 0; opts_len -= opt_len, data += opt_len)
365  {
366  kind = data[0];
367 
368  if (kind == TCP_OPTION_EOL)
369  break;
370  else if (kind == TCP_OPTION_NOOP)
371  {
372  opt_len = 1;
373  continue;
374  }
375  else
376  {
377  if (opts_len < 2)
378  return;
379  opt_len = data[1];
380 
381  if (opt_len < 2 || opt_len > opts_len)
382  return;
383  }
384 
385  if (kind == TCP_OPTION_MSS)
386  {
387  mss = *(u16 *) (data + 2);
388  if (clib_net_to_host_u16 (mss) > sm->mss_clamping)
389  {
390  *sum =
391  ip_csum_update (*sum, mss, sm->mss_value_net, ip4_header_t,
392  length);
393  clib_memcpy_fast (data + 2, &sm->mss_value_net, 2);
394  }
395  return;
396  }
397  }
398 }
399 
400 /**
401  * @brief Check if packet should be translated
402  *
403  * Packets aimed at outside interface and external address with active session
404  * should be translated.
405  *
406  * @param sm NAT main
407  * @param rt NAT runtime data
408  * @param sw_if_index0 index of the inside interface
409  * @param ip0 IPv4 header
410  * @param proto0 NAT protocol
411  * @param rx_fib_index0 RX FIB index
412  *
413  * @returns 0 if packet should be translated otherwise 1
414  */
415 static inline int
417  u32 sw_if_index0, ip4_header_t * ip0, u32 proto0,
418  u32 rx_fib_index0)
419 {
420  if (sm->out2in_dpo)
421  return 0;
422 
424  nat_outside_fib_t *outside_fib;
425  fib_prefix_t pfx = {
427  .fp_len = 32,
428  .fp_addr = {
429  .ip4.as_u32 = ip0->dst_address.as_u32,
430  }
431  ,
432  };
433 
434  /* Don't NAT packet aimed at the intfc address */
435  if (PREDICT_FALSE (is_interface_addr (sm, node, sw_if_index0,
436  ip0->dst_address.as_u32)))
437  return 1;
438 
439  fei = fib_table_lookup (rx_fib_index0, &pfx);
440  if (FIB_NODE_INDEX_INVALID != fei)
441  {
443  if (sw_if_index == ~0)
444  {
445  vec_foreach (outside_fib, sm->outside_fibs)
446  {
447  fei = fib_table_lookup (outside_fib->fib_index, &pfx);
448  if (FIB_NODE_INDEX_INVALID != fei)
449  {
450  sw_if_index = fib_entry_get_resolving_interface (fei);
451  if (sw_if_index != ~0)
452  break;
453  }
454  }
455  }
456  if (sw_if_index == ~0)
457  return 1;
458 
460  pool_foreach (i, sm->interfaces, (
461  {
462  /* NAT packet aimed at outside interface */
463  if ((nat_interface_is_outside (i))
464  && (sw_if_index ==
465  i->sw_if_index)) return 0;}
466  ));
467  }
468 
469  return 1;
470 }
471 
472 #endif /* __included_nat_inlines_h__ */
473 
474 /*
475  * fd.io coding-style-patch-verification: ON
476  *
477  * Local Variables:
478  * eval: (c-set-style "gnu")
479  * End:
480  */
u32 sw_if_index
Definition: ipsec_gre.api:37
fib_protocol_t fp_proto
protocol type
Definition: fib_types.h:212
nat_outside_fib_t * outside_fibs
Definition: nat.h:479
#define snat_is_session_static(s)
Check if SNAT session is created from static mapping.
Definition: nat.h:631
u32 sessions_per_user_list_head_index
Definition: nat.h:239
End of options.
Definition: tcp_packet.h:104
#define NAT44_SES_I2O_FIN
Definition: nat.h:162
u32 icmp_timeout
Definition: nat.h:555
u8 runtime_data[0]
Function dependent node-runtime data.
Definition: node.h:522
static u32 nat44_session_get_timeout(snat_main_t *sm, snat_session_t *s)
Definition: nat_inlines.h:274
#define TCP_FLAG_SYN
Definition: fa_node.h:13
u32 nsessions
Definition: nat.h:240
static_always_inline u8 icmp_is_error_message(icmp46_header_t *icmp)
Definition: nat_inlines.h:54
#define clib_memcpy_fast(a, b, c)
Definition: string.h:81
ip4_address_t * ip4_interface_first_address(ip4_main_t *im, u32 sw_if_index, ip_interface_address_t **result_ia)
Definition: ip4_forward.c:314
static void make_sm_kv(clib_bihash_kv_8_8_t *kv, ip4_address_t *addr, u8 proto, u32 fib_index, u16 port)
Definition: nat_inlines.h:338
#define tcp_doff(_th)
Definition: tcp_packet.h:78
void nat_free_session_data(snat_main_t *sm, snat_session_t *s, u32 thread_index, u8 is_ha)
Free NAT44 session data (lookup keys, external addrres port)
Definition: nat.c:179
u32 nstaticsessions
Definition: nat.h:241
u16 vlib_error_t
Definition: error.h:44
int i
uword ip_csum_t
Definition: ip_packet.h:181
u8 data[128]
Definition: ipsec.api:248
u32 fib_index
Definition: nat.h:238
#define nat44_is_ses_closed(s)
Check if NAT44 endpoint-dependent TCP session is closed.
Definition: nat.h:685
#define NAT44_SES_O2I_FIN
Definition: nat.h:163
No operation.
Definition: tcp_packet.h:105
dlist_elt_t * list_pool
Definition: nat.h:402
struct _tcp_header tcp_header_t
vhost_vring_addr_t addr
Definition: vhost_user.h:121
u32 proto
Definition: nat.h:69
unsigned char u8
Definition: types.h:56
static int nat44_set_tcp_session_state_o2i(snat_main_t *sm, snat_session_t *ses, tcp_header_t *tcp, u32 thread_index)
Definition: nat_inlines.h:240
u16 l_port
Definition: nat.h:70
double f64
Definition: types.h:142
clib_bihash_8_8_t user_hash
Definition: nat.h:393
u32 cached_sw_if_index
Definition: nat.h:587
void nat_ha_sref(ip4_address_t *out_addr, u16 out_port, ip4_address_t *eh_addr, u16 eh_port, u8 proto, u32 fib_index, u32 total_pkts, u64 total_bytes, u32 thread_index, f64 *last_refreshed, f64 now)
Create session refresh HA event.
Definition: nat_ha.c:726
static int snat_not_translate_fast(snat_main_t *sm, vlib_node_runtime_t *node, u32 sw_if_index0, ip4_header_t *ip0, u32 proto0, u32 rx_fib_index0)
Check if packet should be translated.
Definition: nat_inlines.h:416
u32 max_translations_per_user
Definition: nat.h:545
Limit MSS.
Definition: tcp_packet.h:106
#define static_always_inline
Definition: clib.h:99
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:493
u16 r_port
Definition: nat.h:71
#define always_inline
Definition: clib.h:98
ip4_address_t dst_address
Definition: ip4_packet.h:170
#define TCP_FLAG_ACK
Definition: fa_node.h:16
ip4_address_t addr
Definition: nat.h:237
#define SNAT_SESSION_FLAG_OUTPUT_FEATURE
Definition: nat.h:178
#define vec_elt_at_index(v, i)
Get vector value at index i checking that i is in bounds.
Aggregrate type for a prefix.
Definition: fib_types.h:203
ip4_main_t * ip4_main
Definition: nat.h:574
unsigned int u32
Definition: types.h:88
fib_node_index_t fib_table_lookup(u32 fib_index, const fib_prefix_t *prefix)
Perfom a longest prefix match in the non-forwarding table.
Definition: fib_table.c:66
#define NAT44_SES_RST
Definition: nat.h:168
static u8 maximum_sessions_exceeded(snat_main_t *sm, u32 thread_index)
Definition: nat_inlines.h:95
static void nat44_delete_session(snat_main_t *sm, snat_session_t *ses, u32 thread_index)
Definition: nat_inlines.h:169
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:136
u32 max_translations
Definition: nat.h:542
static void mss_clamping(snat_main_t *sm, tcp_header_t *tcp, ip_csum_t *sum)
Definition: nat_inlines.h:353
u32 fib_index
Definition: nat.h:69
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:514
u32 fib_index
Definition: nat.h:260
u16 mss_value_net
Definition: nat.h:559
u64 key
the key
Definition: bihash_8_8.h:33
u16 mss_clamping
Definition: nat.h:558
static void clib_dlist_addtail(dlist_elt_t *pool, u32 head_index, u32 new_index)
Definition: dlist.h:43
unsigned short u16
Definition: types.h:57
u16 protocol
Definition: nat.h:54
u8 out2in_dpo
Definition: nat.h:538
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:286
u32 udp_timeout
Definition: nat.h:552
#define PREDICT_FALSE(x)
Definition: clib.h:111
#define TCP_FLAG_FIN
Definition: fa_node.h:12
#define NAT44_SES_O2I_SYN
Definition: nat.h:167
static void vlib_set_simple_counter(vlib_simple_counter_main_t *cm, u32 thread_index, u32 index, u64 value)
Set a simple counter.
Definition: counter.h:94
#define vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, n_left_to_next, bi0, next0)
Finish enqueueing one buffer forward in the graph.
Definition: buffer_node.h:218
#define vlib_get_next_frame(vm, node, next_index, vectors, n_vectors_left)
Get pointer to next frame vector data by (vlib_node_runtime_t, next_index).
Definition: node_funcs.h:368
#define TCP_FLAG_RST
Definition: fa_node.h:14
u32 fib_entry_get_resolving_interface(fib_node_index_t entry_index)
Definition: fib_entry.c:1461
u64 value
the value
Definition: bihash_8_8.h:34
snat_user_t * users
Definition: nat.h:396
static void nat44_delete_user_with_no_session(snat_main_t *sm, snat_user_t *u, u32 thread_index)
Definition: nat_inlines.h:147
#define nat_log_debug(...)
Definition: nat.h:726
static u8 snat_proto_to_ip_proto(snat_protocol_t snat_proto)
Definition: nat_inlines.h:42
vlib_main_t * vm
Definition: buffer.c:312
ip4_address_t l_addr
Definition: nat.h:67
static void nat44_session_update_counters(snat_session_t *s, f64 now, uword bytes, u32 thread_index)
Definition: nat_inlines.h:297
u32 fib_node_index_t
A typedef of a node index.
Definition: fib_types.h:30
8 octet key, 8 octet key value pair
Definition: bihash_8_8.h:31
ip4_address_t addr
Definition: nat.h:52
void vlib_put_next_frame(vlib_main_t *vm, vlib_node_runtime_t *r, u32 next_index, u32 n_vectors_left)
Release pointer to next frame vector data.
Definition: main.c:465
static void make_ed_kv(clib_bihash_kv_16_8_t *kv, ip4_address_t *l_addr, ip4_address_t *r_addr, u8 proto, u32 fib_index, u16 l_port, u16 r_port)
Definition: nat_inlines.h:321
u32 tcp_transitory_timeout
Definition: nat.h:554
ip4_address_t r_addr
Definition: nat.h:68
static int nat44_set_tcp_session_state_i2o(snat_main_t *sm, snat_session_t *ses, tcp_header_t *tcp, u32 thread_index)
Set TCP session state.
Definition: nat_inlines.h:205
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:514
#define pool_put_index(p, i)
Free pool element with given index.
Definition: pool.h:311
#define tcp_syn(_th)
Definition: tcp_packet.h:80
static void nat44_session_update_lru(snat_main_t *sm, snat_session_t *s, u32 thread_index)
Per-user LRU list maintenance.
Definition: nat_inlines.h:311
u64 as_u64
Definition: nat.h:102
ip4_address_t addr
Definition: nat.h:99
static void clib_dlist_remove(dlist_elt_t *pool, u32 index)
Definition: dlist.h:99
#define NAT44_SES_I2O_SYN
Definition: nat.h:166
format_function_t format_snat_session
Definition: nat.h:617
vlib_simple_counter_main_t total_users
Definition: nat.h:562
static u32 ip_proto_to_snat_proto(u8 ip_proto)
The NAT inline functions.
Definition: nat_inlines.h:27
#define FIB_NODE_INDEX_INVALID
Definition: fib_types.h:31
static void user_session_increment(snat_main_t *sm, snat_user_t *u, u8 is_static)
Definition: nat_inlines.h:135
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
VLIB buffer representation.
Definition: buffer.h:102
u64 uword
Definition: types.h:112
snat_main_per_thread_data_t * per_thread_data
Definition: nat.h:449
snat_protocol_t
Definition: nat.h:133
typedef key
Definition: ipsec.api:244
#define ip_csum_update(sum, old, new, type, field)
Definition: ip_packet.h:231
static u8 is_interface_addr(snat_main_t *sm, vlib_node_runtime_t *node, u32 sw_if_index0, u32 ip4_addr)
Definition: nat_inlines.h:70
u32 fib_index
Definition: nat.h:100
#define NAT44_SES_I2O_FIN_ACK
Definition: nat.h:164
#define vec_foreach(var, vec)
Vector iterator.
static void nat_send_all_to_node(vlib_main_t *vm, u32 *bi_vector, vlib_node_runtime_t *node, vlib_error_t *error, u32 next)
Definition: nat_inlines.h:105
#define NAT44_SES_O2I_FIN_ACK
Definition: nat.h:165
vlib_simple_counter_main_t total_sessions
Definition: nat.h:563
snat_session_t * sessions
Definition: nat.h:399
u32 cached_ip4_address
Definition: nat.h:588
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:85
snat_interface_t * interfaces
Definition: nat.h:461
NAT active-passive HA.
u16 fib_index
Definition: nat.h:54
u32 tcp_established_timeout
Definition: nat.h:553
static uword pool_elts(void *v)
Number of active elements in a pool.
Definition: pool.h:128