FD.io VPP  v19.01.3-6-g70449b9b9
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 
27 {
28  u32 snat_proto = ~0;
29 
30  snat_proto = (ip_proto == IP_PROTOCOL_UDP) ? SNAT_PROTOCOL_UDP : snat_proto;
31  snat_proto = (ip_proto == IP_PROTOCOL_TCP) ? SNAT_PROTOCOL_TCP : snat_proto;
32  snat_proto =
33  (ip_proto == IP_PROTOCOL_ICMP) ? SNAT_PROTOCOL_ICMP : snat_proto;
34  snat_proto =
35  (ip_proto == IP_PROTOCOL_ICMP6) ? SNAT_PROTOCOL_ICMP : snat_proto;
36 
37  return snat_proto;
38 }
39 
42 {
43  u8 ip_proto = ~0;
44 
45  ip_proto = (snat_proto == SNAT_PROTOCOL_UDP) ? IP_PROTOCOL_UDP : ip_proto;
46  ip_proto = (snat_proto == SNAT_PROTOCOL_TCP) ? IP_PROTOCOL_TCP : ip_proto;
47  ip_proto = (snat_proto == SNAT_PROTOCOL_ICMP) ? IP_PROTOCOL_ICMP : ip_proto;
48 
49  return ip_proto;
50 }
51 
53 icmp_is_error_message (icmp46_header_t * icmp)
54 {
55  switch (icmp->type)
56  {
57  case ICMP4_destination_unreachable:
58  case ICMP4_time_exceeded:
59  case ICMP4_parameter_problem:
60  case ICMP4_source_quench:
61  case ICMP4_redirect:
62  case ICMP4_alternate_host_address:
63  return 1;
64  }
65  return 0;
66 }
67 
70  u32 sw_if_index0, u32 ip4_addr)
71 {
73  ip4_address_t *first_int_addr;
74 
75  if (PREDICT_FALSE (rt->cached_sw_if_index != sw_if_index0))
76  {
77  first_int_addr =
78  ip4_interface_first_address (sm->ip4_main, sw_if_index0,
79  0 /* just want the address */ );
80  rt->cached_sw_if_index = sw_if_index0;
81  if (first_int_addr)
82  rt->cached_ip4_address = first_int_addr->as_u32;
83  else
84  rt->cached_ip4_address = 0;
85  }
86 
87  if (PREDICT_FALSE (ip4_addr == rt->cached_ip4_address))
88  return 1;
89  else
90  return 0;
91 }
92 
95 {
96  if (pool_elts (sm->per_thread_data[thread_index].sessions) >=
97  sm->max_translations)
98  return 1;
99 
100  return 0;
101 }
102 
103 always_inline void
105  vlib_node_runtime_t * node, vlib_error_t * error,
106  u32 next)
107 {
108  u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
109 
110  from = bi_vector;
111  n_left_from = vec_len (bi_vector);
112  next_index = node->cached_next_index;
113  while (n_left_from > 0)
114  {
115  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
116  while (n_left_from > 0 && n_left_to_next > 0)
117  {
118  u32 bi0 = to_next[0] = from[0];
119  from += 1;
120  n_left_from -= 1;
121  to_next += 1;
122  n_left_to_next -= 1;
123  vlib_buffer_t *p0 = vlib_get_buffer (vm, bi0);
124  if (error)
125  p0->error = *error;
126  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
127  n_left_to_next, bi0, next);
128  }
129  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
130  }
131 }
132 
133 always_inline void
135 {
137  {
138  if (is_static)
139  u->nstaticsessions++;
140  else
141  u->nsessions++;
142  }
143 }
144 
145 always_inline void
147  u32 thread_index)
148 {
150  snat_user_key_t u_key;
152  thread_index);
153 
154  if (u->nstaticsessions == 0 && u->nsessions == 0)
155  {
156  u_key.addr.as_u32 = u->addr.as_u32;
157  u_key.fib_index = u->fib_index;
158  kv.key = u_key.as_u64;
160  pool_put (tsm->users, u);
161  clib_bihash_add_del_8_8 (&tsm->user_hash, &kv, 0);
162  vlib_set_simple_counter (&sm->total_users, thread_index, 0,
163  pool_elts (tsm->users));
164  }
165 }
166 
167 always_inline void
168 nat44_delete_session (snat_main_t * sm, snat_session_t * ses,
169  u32 thread_index)
170 {
172  thread_index);
173  clib_bihash_kv_8_8_t kv, value;
174  snat_user_key_t u_key;
175  snat_user_t *u;
176 
177  nat_log_debug ("session deleted %U", format_snat_session, tsm, ses);
178 
179  clib_dlist_remove (tsm->list_pool, ses->per_user_index);
180  pool_put_index (tsm->list_pool, ses->per_user_index);
181  pool_put (tsm->sessions, ses);
182  vlib_set_simple_counter (&sm->total_sessions, thread_index, 0,
183  pool_elts (tsm->sessions));
184 
185  u_key.addr = ses->in2out.addr;
186  u_key.fib_index = ses->in2out.fib_index;
187  kv.key = u_key.as_u64;
188  if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
189  {
190  u = pool_elt_at_index (tsm->users, value.value);
191  if (snat_is_session_static (ses))
192  u->nstaticsessions--;
193  else
194  u->nsessions--;
195 
196  nat44_delete_user_with_no_session (sm, u, thread_index);
197  }
198 }
199 
200 /** \brief Set TCP session state.
201  @return 1 if session was closed, otherwise 0
202 */
203 always_inline int
204 nat44_set_tcp_session_state_i2o (snat_main_t * sm, snat_session_t * ses,
205  tcp_header_t * tcp, u32 thread_index)
206 {
207  if ((ses->state == 0) && (tcp->flags & TCP_FLAG_RST))
208  ses->state = NAT44_SES_RST;
209  if ((ses->state == NAT44_SES_RST) && !(tcp->flags & TCP_FLAG_RST))
210  ses->state = 0;
211  if ((tcp->flags & TCP_FLAG_ACK) && (ses->state & NAT44_SES_I2O_SYN) &&
212  (ses->state & NAT44_SES_O2I_SYN))
213  ses->state = 0;
214  if (tcp->flags & TCP_FLAG_SYN)
215  ses->state |= NAT44_SES_I2O_SYN;
216  if (tcp->flags & TCP_FLAG_FIN)
217  {
218  ses->i2o_fin_seq = clib_net_to_host_u32 (tcp->seq_number);
219  ses->state |= NAT44_SES_I2O_FIN;
220  }
221  if ((tcp->flags & TCP_FLAG_ACK) && (ses->state & NAT44_SES_O2I_FIN))
222  {
223  if (clib_net_to_host_u32 (tcp->ack_number) > ses->o2i_fin_seq)
224  ses->state |= NAT44_SES_O2I_FIN_ACK;
225  }
226  if (nat44_is_ses_closed (ses)
227  && !(ses->flags & SNAT_SESSION_FLAG_OUTPUT_FEATURE))
228  {
229  nat_log_debug ("TCP close connection %U", format_snat_session,
230  &sm->per_thread_data[thread_index], ses);
231  nat_free_session_data (sm, ses, thread_index);
232  nat44_delete_session (sm, ses, thread_index);
233  return 1;
234  }
235  return 0;
236 }
237 
238 always_inline int
239 nat44_set_tcp_session_state_o2i (snat_main_t * sm, snat_session_t * ses,
240  tcp_header_t * tcp, u32 thread_index)
241 {
242  if ((ses->state == 0) && (tcp->flags & TCP_FLAG_RST))
243  ses->state = NAT44_SES_RST;
244  if ((ses->state == NAT44_SES_RST) && !(tcp->flags & TCP_FLAG_RST))
245  ses->state = 0;
246  if ((tcp->flags & TCP_FLAG_ACK) && (ses->state & NAT44_SES_I2O_SYN) &&
247  (ses->state & NAT44_SES_O2I_SYN))
248  ses->state = 0;
249  if (tcp->flags & TCP_FLAG_SYN)
250  ses->state |= NAT44_SES_O2I_SYN;
251  if (tcp->flags & TCP_FLAG_FIN)
252  {
253  ses->o2i_fin_seq = clib_net_to_host_u32 (tcp->seq_number);
254  ses->state |= NAT44_SES_O2I_FIN;
255  }
256  if ((tcp->flags & TCP_FLAG_ACK) && (ses->state & NAT44_SES_I2O_FIN))
257  {
258  if (clib_net_to_host_u32 (tcp->ack_number) > ses->i2o_fin_seq)
259  ses->state |= NAT44_SES_I2O_FIN_ACK;
260  }
261  if (nat44_is_ses_closed (ses))
262  {
263  nat_log_debug ("TCP close connection %U", format_snat_session,
264  &sm->per_thread_data[thread_index], ses);
265  nat_free_session_data (sm, ses, thread_index);
266  nat44_delete_session (sm, ses, thread_index);
267  return 1;
268  }
269  return 0;
270 }
271 
273 nat44_session_get_timeout (snat_main_t * sm, snat_session_t * s)
274 {
275  switch (s->in2out.protocol)
276  {
277  case SNAT_PROTOCOL_ICMP:
278  return sm->icmp_timeout;
279  case SNAT_PROTOCOL_UDP:
280  return sm->udp_timeout;
281  case SNAT_PROTOCOL_TCP:
282  {
283  if (s->state)
284  return sm->tcp_transitory_timeout;
285  else
286  return sm->tcp_established_timeout;
287  }
288  default:
289  return sm->udp_timeout;
290  }
291 
292  return 0;
293 }
294 
295 always_inline void
296 nat44_session_update_counters (snat_session_t * s, f64 now, uword bytes)
297 {
298  s->last_heard = now;
299  s->total_pkts++;
300  s->total_bytes += bytes;
301 }
302 
303 /** \brief Per-user LRU list maintenance */
304 always_inline void
305 nat44_session_update_lru (snat_main_t * sm, snat_session_t * s,
306  u32 thread_index)
307 {
308  clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
309  s->per_user_index);
310  clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
311  s->per_user_list_head_index, s->per_user_index);
312 }
313 
314 always_inline void
316  ip4_address_t * r_addr, u8 proto, u32 fib_index, u16 l_port,
317  u16 r_port)
318 {
319  nat_ed_ses_key_t *key = (nat_ed_ses_key_t *) kv->key;
320 
321  key->l_addr.as_u32 = l_addr->as_u32;
322  key->r_addr.as_u32 = r_addr->as_u32;
323  key->fib_index = fib_index;
324  key->proto = proto;
325  key->l_port = l_port;
326  key->r_port = r_port;
327 
328  kv->value = ~0ULL;
329 }
330 
331 always_inline void
333  u32 fib_index, u16 port)
334 {
335  snat_session_key_t key;
336 
337  key.addr.as_u32 = addr->as_u32;
338  key.port = port;
339  key.protocol = proto;
340  key.fib_index = fib_index;
341 
342  kv->key = key.as_u64;
343  kv->value = ~0ULL;
344 }
345 
346 always_inline void
348 {
349  u8 *data;
350  u8 opt_len, opts_len, kind;
351  u16 mss;
352 
353  if (!(sm->mss_clamping && tcp_syn (tcp)))
354  return;
355 
356  opts_len = (tcp_doff (tcp) << 2) - sizeof (tcp_header_t);
357  data = (u8 *) (tcp + 1);
358  for (; opts_len > 0; opts_len -= opt_len, data += opt_len)
359  {
360  kind = data[0];
361 
362  if (kind == TCP_OPTION_EOL)
363  break;
364  else if (kind == TCP_OPTION_NOOP)
365  {
366  opt_len = 1;
367  continue;
368  }
369  else
370  {
371  if (opts_len < 2)
372  return;
373  opt_len = data[1];
374 
375  if (opt_len < 2 || opt_len > opts_len)
376  return;
377  }
378 
379  if (kind == TCP_OPTION_MSS)
380  {
381  mss = *(u16 *) (data + 2);
382  if (clib_net_to_host_u16 (mss) > sm->mss_clamping)
383  {
384  *sum =
385  ip_csum_update (*sum, mss, sm->mss_value_net, ip4_header_t,
386  length);
387  clib_memcpy_fast (data + 2, &sm->mss_value_net, 2);
388  }
389  return;
390  }
391  }
392 }
393 
394 /**
395  * @brief Check if packet should be translated
396  *
397  * Packets aimed at outside interface and external address with active session
398  * should be translated.
399  *
400  * @param sm NAT main
401  * @param rt NAT runtime data
402  * @param sw_if_index0 index of the inside interface
403  * @param ip0 IPv4 header
404  * @param proto0 NAT protocol
405  * @param rx_fib_index0 RX FIB index
406  *
407  * @returns 0 if packet should be translated otherwise 1
408  */
409 static inline int
411  u32 sw_if_index0, ip4_header_t * ip0, u32 proto0,
412  u32 rx_fib_index0)
413 {
414  if (sm->out2in_dpo)
415  return 0;
416 
418  nat_outside_fib_t *outside_fib;
419  fib_prefix_t pfx = {
421  .fp_len = 32,
422  .fp_addr = {
423  .ip4.as_u32 = ip0->dst_address.as_u32,
424  }
425  ,
426  };
427 
428  /* Don't NAT packet aimed at the intfc address */
429  if (PREDICT_FALSE (is_interface_addr (sm, node, sw_if_index0,
430  ip0->dst_address.as_u32)))
431  return 1;
432 
433  fei = fib_table_lookup (rx_fib_index0, &pfx);
434  if (FIB_NODE_INDEX_INVALID != fei)
435  {
437  if (sw_if_index == ~0)
438  {
439  vec_foreach (outside_fib, sm->outside_fibs)
440  {
441  fei = fib_table_lookup (outside_fib->fib_index, &pfx);
442  if (FIB_NODE_INDEX_INVALID != fei)
443  {
444  sw_if_index = fib_entry_get_resolving_interface (fei);
445  if (sw_if_index != ~0)
446  break;
447  }
448  }
449  }
450  if (sw_if_index == ~0)
451  return 1;
452 
454  pool_foreach (i, sm->interfaces, (
455  {
456  /* NAT packet aimed at outside interface */
457  if ((nat_interface_is_outside (i))
458  && (sw_if_index ==
459  i->sw_if_index)) return 0;}
460  ));
461  }
462 
463  return 1;
464 }
465 
466 #endif /* __included_nat_inlines_h__ */
467 
468 /*
469  * fd.io coding-style-patch-verification: ON
470  *
471  * Local Variables:
472  * eval: (c-set-style "gnu")
473  * End:
474  */
fib_protocol_t fp_proto
protocol type
Definition: fib_types.h:212
nat_outside_fib_t * outside_fibs
Definition: nat.h:476
#define snat_is_session_static(s)
Check if SNAT session is created from static mapping.
Definition: nat.h:605
u32 sessions_per_user_list_head_index
Definition: nat.h:236
End of options.
Definition: tcp_packet.h:104
#define NAT44_SES_I2O_FIN
Definition: nat.h:162
u32 icmp_timeout
Definition: nat.h:529
u8 runtime_data[0]
Function dependent node-runtime data.
Definition: node.h:545
static u32 nat44_session_get_timeout(snat_main_t *sm, snat_session_t *s)
Definition: nat_inlines.h:273
#define TCP_FLAG_SYN
Definition: fa_node.h:13
u32 nsessions
Definition: nat.h:237
static_always_inline u8 icmp_is_error_message(icmp46_header_t *icmp)
Definition: nat_inlines.h:53
#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:313
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:332
#define tcp_doff(_th)
Definition: tcp_packet.h:78
u32 nstaticsessions
Definition: nat.h:238
u16 vlib_error_t
Definition: error.h:43
int i
uword ip_csum_t
Definition: ip_packet.h:181
u32 fib_index
Definition: nat.h:235
#define nat44_is_ses_closed(s)
Check if NAT44 endpoint-dependent TCP session is closed.
Definition: nat.h:659
#define NAT44_SES_O2I_FIN
Definition: nat.h:163
No operation.
Definition: tcp_packet.h:105
dlist_elt_t * list_pool
Definition: nat.h:399
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:239
u16 l_port
Definition: nat.h:70
double f64
Definition: types.h:142
clib_bihash_8_8_t user_hash
Definition: nat.h:390
u32 cached_sw_if_index
Definition: nat.h:561
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:410
u32 max_translations_per_user
Definition: nat.h:519
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:490
u16 r_port
Definition: nat.h:71
u32 sw_if_index
Definition: vxlan_gbp.api:37
#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:234
#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:548
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:94
static void nat44_delete_session(snat_main_t *sm, snat_session_t *ses, u32 thread_index)
Definition: nat_inlines.h:168
u32 max_translations
Definition: nat.h:516
static void mss_clamping(snat_main_t *sm, tcp_header_t *tcp, ip_csum_t *sum)
Definition: nat_inlines.h:347
u32 fib_index
Definition: nat.h:69
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:511
void nat_free_session_data(snat_main_t *sm, snat_session_t *s, u32 thread_index)
Free NAT44 session data (lookup keys, external addrres port)
Definition: nat.c:178
u32 fib_index
Definition: nat.h:257
u16 mss_value_net
Definition: nat.h:533
u64 key
the key
Definition: bihash_8_8.h:33
u16 mss_clamping
Definition: nat.h:532
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:512
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:286
u32 udp_timeout
Definition: nat.h:526
#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:338
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:139
#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:1451
u64 value
the value
Definition: bihash_8_8.h:34
snat_user_t * users
Definition: nat.h:393
static void nat44_delete_user_with_no_session(snat_main_t *sm, snat_user_t *u, u32 thread_index)
Definition: nat_inlines.h:146
#define nat_log_debug(...)
Definition: nat.h:700
static u8 snat_proto_to_ip_proto(snat_protocol_t snat_proto)
Definition: nat_inlines.h:41
vlib_main_t * vm
Definition: buffer.c:301
ip4_address_t l_addr
Definition: nat.h:67
static void nat44_session_update_counters(snat_session_t *s, f64 now, uword bytes)
Definition: nat_inlines.h:296
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:452
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:315
u32 tcp_transitory_timeout
Definition: nat.h:528
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:204
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:537
#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:305
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:591
vlib_simple_counter_main_t total_users
Definition: nat.h:536
static u32 ip_proto_to_snat_proto(u8 ip_proto)
The NAT inline functions.
Definition: nat_inlines.h:26
#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:134
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
u64 uword
Definition: types.h:112
snat_main_per_thread_data_t * per_thread_data
Definition: nat.h:446
snat_protocol_t
Definition: nat.h:133
#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:69
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:104
#define NAT44_SES_O2I_FIN_ACK
Definition: nat.h:165
vlib_simple_counter_main_t total_sessions
Definition: nat.h:537
snat_session_t * sessions
Definition: nat.h:396
u32 cached_ip4_address
Definition: nat.h:562
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:62
snat_interface_t * interfaces
Definition: nat.h:458
u16 fib_index
Definition: nat.h:54
u32 tcp_established_timeout
Definition: nat.h:527
static uword pool_elts(void *v)
Number of active elements in a pool.
Definition: pool.h:128