FD.io VPP  v19.01.1-17-ge106252
Vector Packet Processing
dslite_in2out.c
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1 /*
2  * Copyright (c) 2017 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 #include <nat/dslite.h>
16 #include <nat/nat_inlines.h>
17 #include <nat/nat_syslog.h>
18 
21 
22 typedef enum
23 {
30 
31 static char *dslite_in2out_error_strings[] = {
32 #define _(sym,string) string,
34 #undef _
35 };
36 
37 static u32
39  dslite_session_t ** sp, u32 next, u8 * error, u32 thread_index)
40 {
41  dslite_b4_t *b4;
42  clib_bihash_kv_16_8_t b4_kv, b4_value;
43  clib_bihash_kv_24_8_t in2out_kv;
44  clib_bihash_kv_8_8_t out2in_kv;
45  dlist_elt_t *head_elt, *oldest_elt, *elt;
46  u32 oldest_index;
47  dslite_session_t *s;
48  snat_session_key_t out2in_key;
49  u32 b4_index;
50 
51  out2in_key.protocol = in2out_key->proto;
52  out2in_key.fib_index = 0;
53 
54  b4_kv.key[0] = in2out_key->softwire_id.as_u64[0];
55  b4_kv.key[1] = in2out_key->softwire_id.as_u64[1];
56 
57  if (clib_bihash_search_16_8
58  (&dm->per_thread_data[thread_index].b4_hash, &b4_kv, &b4_value))
59  {
60  pool_get (dm->per_thread_data[thread_index].b4s, b4);
61  clib_memset (b4, 0, sizeof (*b4));
62  b4->addr.as_u64[0] = in2out_key->softwire_id.as_u64[0];
63  b4->addr.as_u64[1] = in2out_key->softwire_id.as_u64[1];
64 
65  pool_get (dm->per_thread_data[thread_index].list_pool, head_elt);
67  head_elt - dm->per_thread_data[thread_index].list_pool;
68  clib_dlist_init (dm->per_thread_data[thread_index].list_pool,
70 
71  b4_index = b4_kv.value = b4 - dm->per_thread_data[thread_index].b4s;
72  clib_bihash_add_del_16_8 (&dm->per_thread_data[thread_index].b4_hash,
73  &b4_kv, 1);
74 
75  vlib_set_simple_counter (&dm->total_b4s, thread_index, 0,
76  pool_elts (dm->
77  per_thread_data[thread_index].b4s));
78  }
79  else
80  {
81  b4_index = b4_value.value;
82  b4 =
83  pool_elt_at_index (dm->per_thread_data[thread_index].b4s,
84  b4_value.value);
85  }
86 
87  //TODO configurable quota
88  if (b4->nsessions >= 1000)
89  {
90  oldest_index =
93  ASSERT (oldest_index != ~0);
94  clib_dlist_addtail (dm->per_thread_data[thread_index].list_pool,
95  b4->sessions_per_b4_list_head_index, oldest_index);
96  oldest_elt =
97  pool_elt_at_index (dm->per_thread_data[thread_index].list_pool,
98  oldest_index);
99  s =
100  pool_elt_at_index (dm->per_thread_data[thread_index].sessions,
101  oldest_elt->value);
102 
103  in2out_kv.key[0] = s->in2out.as_u64[0];
104  in2out_kv.key[1] = s->in2out.as_u64[1];
105  in2out_kv.key[2] = s->in2out.as_u64[2];
106  clib_bihash_add_del_24_8 (&dm->per_thread_data[thread_index].in2out,
107  &in2out_kv, 0);
108  out2in_kv.key = s->out2in.as_u64;
109  clib_bihash_add_del_8_8 (&dm->per_thread_data[thread_index].out2in,
110  &out2in_kv, 0);
112  &s->out2in);
113 
114  nat_syslog_dslite_apmdel (b4_index, &s->in2out.softwire_id,
115  &s->in2out.addr, s->in2out.port,
116  &s->out2in.addr, s->out2in.port,
117  s->in2out.proto);
118 
120  (dm->addr_pool, 0, thread_index, &out2in_key,
121  dm->port_per_thread, thread_index))
122  ASSERT (0);
123  }
124  else
125  {
127  (dm->addr_pool, 0, thread_index, &out2in_key,
128  dm->port_per_thread, thread_index))
129  {
130  *error = DSLITE_ERROR_OUT_OF_PORTS;
132  }
133  pool_get (dm->per_thread_data[thread_index].sessions, s);
134  clib_memset (s, 0, sizeof (*s));
135  b4->nsessions++;
136 
137  pool_get (dm->per_thread_data[thread_index].list_pool, elt);
138  clib_dlist_init (dm->per_thread_data[thread_index].list_pool,
139  elt - dm->per_thread_data[thread_index].list_pool);
140  elt->value = s - dm->per_thread_data[thread_index].sessions;
141  s->per_b4_index = elt - dm->per_thread_data[thread_index].list_pool;
142  s->per_b4_list_head_index = b4->sessions_per_b4_list_head_index;
143  clib_dlist_addtail (dm->per_thread_data[thread_index].list_pool,
144  s->per_b4_list_head_index,
145  elt - dm->per_thread_data[thread_index].list_pool);
146 
147  vlib_set_simple_counter (&dm->total_sessions, thread_index, 0,
149  [thread_index].sessions));
150  }
151 
152  s->in2out = *in2out_key;
153  s->out2in = out2in_key;
154  *sp = s;
155  in2out_kv.key[0] = s->in2out.as_u64[0];
156  in2out_kv.key[1] = s->in2out.as_u64[1];
157  in2out_kv.key[2] = s->in2out.as_u64[2];
158  in2out_kv.value = s - dm->per_thread_data[thread_index].sessions;
159  clib_bihash_add_del_24_8 (&dm->per_thread_data[thread_index].in2out,
160  &in2out_kv, 1);
161  out2in_kv.key = s->out2in.as_u64;
162  out2in_kv.value = s - dm->per_thread_data[thread_index].sessions;
163  clib_bihash_add_del_8_8 (&dm->per_thread_data[thread_index].out2in,
164  &out2in_kv, 1);
165 
166  nat_syslog_dslite_apmadd (b4_index, &s->in2out.softwire_id, &s->in2out.addr,
167  s->in2out.port, &s->out2in.addr, s->out2in.port,
168  s->in2out.proto);
169 
170  return next;
171 }
172 
173 static inline u32
175  ip4_header_t * ip4, dslite_session_t ** sp, u32 next,
176  u8 * error, u32 thread_index)
177 {
178  dslite_session_t *s = 0;
179  icmp46_header_t *icmp = ip4_next_header (ip4);
180  clib_bihash_kv_24_8_t kv, value;
182  u32 n = next;
183  icmp_echo_header_t *echo;
184  u32 new_addr, old_addr;
185  u16 old_id, new_id;
186  ip_csum_t sum;
187 
188  if (icmp_is_error_message (icmp))
189  {
191  *error = DSLITE_ERROR_BAD_ICMP_TYPE;
192  goto done;
193  }
194 
195  echo = (icmp_echo_header_t *) (icmp + 1);
196 
197  key.addr = ip4->src_address;
198  key.port = echo->identifier;
199  key.proto = SNAT_PROTOCOL_ICMP;
200  key.softwire_id.as_u64[0] = ip6->src_address.as_u64[0];
201  key.softwire_id.as_u64[1] = ip6->src_address.as_u64[1];
202  key.pad = 0;
203  kv.key[0] = key.as_u64[0];
204  kv.key[1] = key.as_u64[1];
205  kv.key[2] = key.as_u64[2];
206 
207  if (clib_bihash_search_24_8
208  (&dm->per_thread_data[thread_index].in2out, &kv, &value))
209  {
210  n = slow_path (dm, &key, &s, next, error, thread_index);
212  goto done;
213  }
214  else
215  {
216  s =
217  pool_elt_at_index (dm->per_thread_data[thread_index].sessions,
218  value.value);
219  }
220 
221  old_addr = ip4->src_address.as_u32;
222  ip4->src_address = s->out2in.addr;
223  new_addr = ip4->src_address.as_u32;
224  sum = ip4->checksum;
225  sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address);
226  ip4->checksum = ip_csum_fold (sum);
227 
228  old_id = echo->identifier;
229  echo->identifier = new_id = s->out2in.port;
230  sum = icmp->checksum;
231  sum = ip_csum_update (sum, old_id, new_id, icmp_echo_header_t, identifier);
232  icmp->checksum = ip_csum_fold (sum);
233 
234 done:
235  *sp = s;
236  return n;
237 }
238 
239 static inline uword
241  vlib_frame_t * frame, u8 is_slow_path)
242 {
243  u32 n_left_from, *from, *to_next;
244  dslite_in2out_next_t next_index;
245  u32 node_index;
246  vlib_node_runtime_t *error_node;
247  u32 thread_index = vm->thread_index;
248  f64 now = vlib_time_now (vm);
249  dslite_main_t *dm = &dslite_main;
250 
251  node_index =
252  is_slow_path ? dslite_in2out_slowpath_node.
253  index : dslite_in2out_node.index;
254 
255  error_node = vlib_node_get_runtime (vm, node_index);
256 
257  from = vlib_frame_vector_args (frame);
258  n_left_from = frame->n_vectors;
259  next_index = node->cached_next_index;
260 
261  while (n_left_from > 0)
262  {
263  u32 n_left_to_next;
264 
265  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
266 
267  while (n_left_from > 0 && n_left_to_next > 0)
268  {
269  u32 bi0;
270  vlib_buffer_t *b0;
272  ip4_header_t *ip40;
273  ip6_header_t *ip60;
274  u8 error0 = DSLITE_ERROR_IN2OUT;
275  u32 proto0;
276  dslite_session_t *s0 = 0;
277  clib_bihash_kv_24_8_t kv0, value0;
279  udp_header_t *udp0;
280  tcp_header_t *tcp0;
281  ip_csum_t sum0;
282  u32 new_addr0, old_addr0;
283  u16 old_port0, new_port0;
284 
285  /* speculatively enqueue b0 to the current next frame */
286  bi0 = from[0];
287  to_next[0] = bi0;
288  from += 1;
289  to_next += 1;
290  n_left_from -= 1;
291  n_left_to_next -= 1;
292 
293  b0 = vlib_get_buffer (vm, bi0);
294  ip60 = vlib_buffer_get_current (b0);
295 
296  if (PREDICT_FALSE (ip60->protocol != IP_PROTOCOL_IP_IN_IP))
297  {
298  if (ip60->protocol == IP_PROTOCOL_ICMP6)
299  {
301  goto trace0;
302  }
303  error0 = DSLITE_ERROR_BAD_IP6_PROTOCOL;
304  next0 = DSLITE_IN2OUT_NEXT_DROP;
305  goto trace0;
306  }
307 
308  ip40 = vlib_buffer_get_current (b0) + sizeof (ip6_header_t);
309  proto0 = ip_proto_to_snat_proto (ip40->protocol);
310 
311  if (PREDICT_FALSE (proto0 == ~0))
312  {
313  error0 = DSLITE_ERROR_UNSUPPORTED_PROTOCOL;
314  next0 = DSLITE_IN2OUT_NEXT_DROP;
315  goto trace0;
316  }
317 
318  udp0 = ip4_next_header (ip40);
319  tcp0 = (tcp_header_t *) udp0;
320 
321  if (is_slow_path)
322  {
323  if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
324  {
325  next0 =
326  dslite_icmp_in2out (dm, ip60, ip40, &s0, next0, &error0,
327  thread_index);
328  if (PREDICT_FALSE (next0 == DSLITE_IN2OUT_NEXT_DROP))
329  goto trace0;
330 
331  goto accounting0;
332  }
333  }
334  else
335  {
336  if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
337  {
339  goto trace0;
340  }
341  }
342 
343  key0.addr = ip40->src_address;
344  key0.port = udp0->src_port;
345  key0.proto = proto0;
346  key0.softwire_id.as_u64[0] = ip60->src_address.as_u64[0];
347  key0.softwire_id.as_u64[1] = ip60->src_address.as_u64[1];
348  key0.pad = 0;
349  kv0.key[0] = key0.as_u64[0];
350  kv0.key[1] = key0.as_u64[1];
351  kv0.key[2] = key0.as_u64[2];
352 
353  if (clib_bihash_search_24_8
354  (&dm->per_thread_data[thread_index].in2out, &kv0, &value0))
355  {
356  if (is_slow_path)
357  {
358  next0 =
359  slow_path (dm, &key0, &s0, next0, &error0, thread_index);
360  if (PREDICT_FALSE (next0 == DSLITE_IN2OUT_NEXT_DROP))
361  goto trace0;
362  }
363  else
364  {
366  goto trace0;
367  }
368  }
369  else
370  {
371  s0 =
372  pool_elt_at_index (dm->per_thread_data[thread_index].sessions,
373  value0.value);
374  }
375 
376  old_addr0 = ip40->src_address.as_u32;
377  ip40->src_address = s0->out2in.addr;
378  new_addr0 = ip40->src_address.as_u32;
379  sum0 = ip40->checksum;
380  sum0 =
381  ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
382  src_address);
383  ip40->checksum = ip_csum_fold (sum0);
384  if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
385  {
386  old_port0 = tcp0->src_port;
387  tcp0->src_port = s0->out2in.port;
388  new_port0 = tcp0->src_port;
389 
390  sum0 = tcp0->checksum;
391  sum0 =
392  ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
393  dst_address);
394  sum0 =
395  ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
396  length);
397  mss_clamping (&snat_main, tcp0, &sum0);
398  tcp0->checksum = ip_csum_fold (sum0);
399  }
400  else
401  {
402  old_port0 = udp0->src_port;
403  udp0->src_port = s0->out2in.port;
404  udp0->checksum = 0;
405  }
406 
407  accounting0:
408  /* Accounting */
409  s0->last_heard = now;
410  s0->total_pkts++;
411  s0->total_bytes += vlib_buffer_length_in_chain (vm, b0);
412  /* Per-B4 LRU list maintenance */
413  clib_dlist_remove (dm->per_thread_data[thread_index].list_pool,
414  s0->per_b4_index);
415  clib_dlist_addtail (dm->per_thread_data[thread_index].list_pool,
416  s0->per_b4_list_head_index, s0->per_b4_index);
417 
418  ip40->tos =
419  (clib_net_to_host_u32
420  (ip60->ip_version_traffic_class_and_flow_label) & 0x0ff00000) >>
421  20;
422  vlib_buffer_advance (b0, sizeof (ip6_header_t));
423 
424  trace0:
426  && (b0->flags & VLIB_BUFFER_IS_TRACED)))
427  {
428  dslite_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
429  t->next_index = next0;
430  t->session_index = ~0;
431  if (s0)
432  t->session_index =
433  s0 - dm->per_thread_data[thread_index].sessions;
434  }
435 
436  b0->error = error_node->errors[error0];
437 
438  /* verify speculative enqueue, maybe switch current next frame */
439  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
440  n_left_to_next, bi0, next0);
441  }
442  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
443  }
444 
445  return frame->n_vectors;
446 }
447 
448 static uword
450  vlib_frame_t * frame)
451 {
452  return dslite_in2out_node_fn_inline (vm, node, frame, 0);
453 }
454 
455 /* *INDENT-OFF* */
457  .function = dslite_in2out_node_fn,
458  .name = "dslite-in2out",
459  .vector_size = sizeof (u32),
460  .format_trace = format_dslite_trace,
461  .type = VLIB_NODE_TYPE_INTERNAL,
463  .error_strings = dslite_in2out_error_strings,
464  .n_next_nodes = DSLITE_IN2OUT_N_NEXT,
465  /* edit / add dispositions here */
466  .next_nodes = {
467  [DSLITE_IN2OUT_NEXT_DROP] = "error-drop",
468  [DSLITE_IN2OUT_NEXT_IP4_LOOKUP] = "ip4-lookup",
469  [DSLITE_IN2OUT_NEXT_IP6_ICMP] = "ip6-icmp-input",
470  [DSLITE_IN2OUT_NEXT_SLOWPATH] = "dslite-in2out-slowpath",
471  },
472 };
473 /* *INDENT-ON* */
474 
476 
477 static uword
479  vlib_frame_t * frame)
480 {
481  return dslite_in2out_node_fn_inline (vm, node, frame, 1);
482 }
483 
484 /* *INDENT-OFF* */
486  .function = dslite_in2out_slowpath_node_fn,
487  .name = "dslite-in2out-slowpath",
488  .vector_size = sizeof (u32),
489  .format_trace = format_dslite_trace,
490  .type = VLIB_NODE_TYPE_INTERNAL,
492  .error_strings = dslite_in2out_error_strings,
493  .n_next_nodes = DSLITE_IN2OUT_N_NEXT,
494  /* edit / add dispositions here */
495  .next_nodes = {
496  [DSLITE_IN2OUT_NEXT_DROP] = "error-drop",
497  [DSLITE_IN2OUT_NEXT_IP4_LOOKUP] = "ip4-lookup",
498  [DSLITE_IN2OUT_NEXT_IP6_ICMP] = "ip6-lookup",
499  [DSLITE_IN2OUT_NEXT_SLOWPATH] = "dslite-in2out-slowpath",
500  },
501 };
502 /* *INDENT-ON* */
503 
506 
507 /*
508  * fd.io coding-style-patch-verification: ON
509  *
510  * Local Variables:
511  * eval: (c-set-style "gnu")
512  * End:
513  */
static void clib_dlist_init(dlist_elt_t *pool, u32 index)
Definition: dlist.h:36
ip4_address_t src_address
Definition: ip4_packet.h:170
u16 port_per_thread
Definition: dslite.h:88
u8 * format_dslite_trace(u8 *s, va_list *args)
Definition: dslite.c:231
#define PREDICT_TRUE(x)
Definition: clib.h:112
u64 as_u64[2]
Definition: ip6_packet.h:51
static_always_inline u8 icmp_is_error_message(icmp46_header_t *icmp)
Definition: nat_inlines.h:53
dslite_in2out_next_t
Definition: dslite_in2out.c:22
static f64 vlib_time_now(vlib_main_t *vm)
Definition: main.h:232
u32 thread_index
Definition: main.h:179
clib_memset(h->entries, 0, sizeof(h->entries[0])*entries)
uword ip_csum_t
Definition: ip_packet.h:181
vlib_error_t * errors
Vector of errors for this node.
Definition: node.h:494
u32 session_index
Definition: dslite.h:102
clib_bihash_16_8_t b4_hash
Definition: dslite.h:66
static uword vlib_buffer_length_in_chain(vlib_main_t *vm, vlib_buffer_t *b)
Get length in bytes of the buffer chain.
Definition: buffer_funcs.h:267
#define pool_get(P, E)
Allocate an object E from a pool P (unspecified alignment).
Definition: pool.h:236
struct _tcp_header tcp_header_t
ip6_address_t src_address
Definition: ip6_packet.h:378
unsigned char u8
Definition: types.h:56
double f64
Definition: types.h:142
static uword dslite_in2out_node_fn_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, u8 is_slow_path)
static u32 slow_path(dslite_main_t *dm, dslite_session_key_t *in2out_key, dslite_session_t **sp, u32 next, u8 *error, u32 thread_index)
Definition: dslite_in2out.c:38
ip6_address_t addr
Definition: dslite.h:54
static void * ip4_next_header(ip4_header_t *i)
Definition: ip4_packet.h:241
unsigned int u32
Definition: types.h:88
static char * dslite_in2out_error_strings[]
Definition: dslite_in2out.c:31
void snat_free_outside_address_and_port(snat_address_t *addresses, u32 thread_index, snat_session_key_t *k)
Free outside address and port pair.
Definition: nat.c:2249
dlist_elt_t * list_pool
Definition: dslite.h:75
static void mss_clamping(snat_main_t *sm, tcp_header_t *tcp, ip_csum_t *sum)
Definition: nat_inlines.h:347
int snat_alloc_outside_address_and_port(snat_address_t *addresses, u32 fib_index, u32 thread_index, snat_session_key_t *k, u16 port_per_thread, u32 snat_thread_index)
Alloc outside address and port.
Definition: nat.c:2432
clib_bihash_8_8_t out2in
Definition: dslite.h:62
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:511
u64 key
the key
Definition: bihash_8_8.h:33
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
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:214
void nat_syslog_dslite_apmadd(u32 ssubix, ip6_address_t *sv6enc, ip4_address_t *isaddr, u16 isport, ip4_address_t *xsaddr, u16 xsport, snat_protocol_t proto)
Definition: nat_syslog.c:127
#define PREDICT_FALSE(x)
Definition: clib.h:111
vl_api_address_union_t src_address
Definition: ip_types.api:44
snat_address_t * addr_pool
Definition: dslite.h:85
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
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:139
snat_main_t snat_main
Definition: nat.c:38
u64 value
the value
Definition: bihash_8_8.h:34
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
u16 n_vectors
Definition: node.h:420
vlib_main_t * vm
Definition: buffer.c:301
static vlib_node_runtime_t * vlib_node_get_runtime(vlib_main_t *vm, u32 node_index)
Get node runtime by node index.
Definition: node_funcs.h:89
VLIB_NODE_FUNCTION_MULTIARCH(dslite_in2out_node, dslite_in2out_node_fn)
dslite_main_t dslite_main
Definition: dslite.c:19
8 octet key, 8 octet key value pair
Definition: bihash_8_8.h:31
#define ARRAY_LEN(x)
Definition: clib.h:62
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:459
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:538
#define ASSERT(truth)
static u32 dslite_icmp_in2out(dslite_main_t *dm, ip6_header_t *ip6, ip4_header_t *ip4, dslite_session_t **sp, u32 next, u8 *error, u32 thread_index)
u32 nsessions
Definition: dslite.h:56
static uword dslite_in2out_slowpath_node_fn(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
static uword dslite_in2out_node_fn(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:233
static void clib_dlist_remove(dlist_elt_t *pool, u32 index)
Definition: dlist.h:99
vlib_simple_counter_main_t total_b4s
Definition: dslite.h:91
dslite_b4_t * b4s
Definition: dslite.h:69
u32 value
Definition: dlist.h:32
dslite_per_thread_data_t * per_thread_data
Definition: dslite.h:84
static void * vlib_add_trace(vlib_main_t *vm, vlib_node_runtime_t *r, vlib_buffer_t *b, u32 n_data_bytes)
Definition: trace_funcs.h:57
struct _vlib_node_registration vlib_node_registration_t
u32 ip_version_traffic_class_and_flow_label
Definition: ip6_packet.h:365
static u32 ip_proto_to_snat_proto(u8 ip_proto)
The NAT inline functions.
Definition: nat_inlines.h:26
u32 next_index
Definition: dslite.h:101
vlib_simple_counter_main_t total_sessions
Definition: dslite.h:92
u64 uword
Definition: types.h:112
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:274
#define ip_csum_update(sum, old, new, type, field)
Definition: ip_packet.h:231
NAT syslog logging.
ip6_address_t softwire_id
Definition: dslite.h:29
dslite_session_t * sessions
Definition: dslite.h:72
vlib_node_registration_t dslite_in2out_node
(constructor) VLIB_REGISTER_NODE (dslite_in2out_node)
Definition: dslite_in2out.c:19
vlib_node_registration_t dslite_in2out_slowpath_node
(constructor) VLIB_REGISTER_NODE (dslite_in2out_slowpath_node)
Definition: dslite_in2out.c:20
#define foreach_dslite_error
Definition: dslite.h:110
u16 flags
Copy of main node flags.
Definition: node.h:532
void nat_syslog_dslite_apmdel(u32 ssubix, ip6_address_t *sv6enc, ip4_address_t *isaddr, u16 isport, ip4_address_t *xsaddr, u16 xsport, snat_protocol_t proto)
Definition: nat_syslog.c:137
clib_bihash_24_8_t in2out
Definition: dslite.h:63
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:326
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index, VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:117
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
u32 sessions_per_b4_list_head_index
Definition: dslite.h:55
static u16 ip_csum_fold(ip_csum_t c)
Definition: ip_packet.h:237
ip4_address_t addr
Definition: dslite.h:30
u16 fib_index
Definition: nat.h:54
static u32 clib_dlist_remove_head(dlist_elt_t *pool, u32 head_index)
Definition: dlist.h:117
static uword pool_elts(void *v)
Number of active elements in a pool.
Definition: pool.h:128