FD.io VPP  v18.10-34-gcce845e
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 
20 
21 typedef enum
22 {
29 
30 static char *dslite_in2out_error_strings[] = {
31 #define _(sym,string) string,
33 #undef _
34 };
35 
36 static u32
38  dslite_session_t ** sp, u32 next, u8 * error, u32 thread_index)
39 {
40  dslite_b4_t *b4;
41  clib_bihash_kv_16_8_t b4_kv, b4_value;
42  clib_bihash_kv_24_8_t in2out_kv;
43  clib_bihash_kv_8_8_t out2in_kv;
44  dlist_elt_t *head_elt, *oldest_elt, *elt;
45  u32 oldest_index;
46  dslite_session_t *s;
47  snat_session_key_t out2in_key;
48 
49  out2in_key.protocol = in2out_key->proto;
50  out2in_key.fib_index = 0;
51 
52  b4_kv.key[0] = in2out_key->softwire_id.as_u64[0];
53  b4_kv.key[1] = in2out_key->softwire_id.as_u64[1];
54 
55  if (clib_bihash_search_16_8
56  (&dm->per_thread_data[thread_index].b4_hash, &b4_kv, &b4_value))
57  {
58  pool_get (dm->per_thread_data[thread_index].b4s, b4);
59  memset (b4, 0, sizeof (*b4));
60  b4->addr.as_u64[0] = in2out_key->softwire_id.as_u64[0];
61  b4->addr.as_u64[1] = in2out_key->softwire_id.as_u64[1];
62 
63  pool_get (dm->per_thread_data[thread_index].list_pool, head_elt);
65  head_elt - dm->per_thread_data[thread_index].list_pool;
66  clib_dlist_init (dm->per_thread_data[thread_index].list_pool,
68 
69  b4_kv.value = b4 - dm->per_thread_data[thread_index].b4s;
70  clib_bihash_add_del_16_8 (&dm->per_thread_data[thread_index].b4_hash,
71  &b4_kv, 1);
72  }
73  else
74  {
75  b4 =
76  pool_elt_at_index (dm->per_thread_data[thread_index].b4s,
77  b4_value.value);
78  }
79 
80  //TODO configurable quota
81  if (b4->nsessions >= 1000)
82  {
83  oldest_index =
86  ASSERT (oldest_index != ~0);
87  clib_dlist_addtail (dm->per_thread_data[thread_index].list_pool,
88  b4->sessions_per_b4_list_head_index, oldest_index);
89  oldest_elt =
90  pool_elt_at_index (dm->per_thread_data[thread_index].list_pool,
91  oldest_index);
92  s =
93  pool_elt_at_index (dm->per_thread_data[thread_index].sessions,
94  oldest_elt->value);
95 
96  in2out_kv.key[0] = s->in2out.as_u64[0];
97  in2out_kv.key[1] = s->in2out.as_u64[1];
98  in2out_kv.key[2] = s->in2out.as_u64[2];
99  clib_bihash_add_del_24_8 (&dm->per_thread_data[thread_index].in2out,
100  &in2out_kv, 0);
101  out2in_kv.key = s->out2in.as_u64;
102  clib_bihash_add_del_8_8 (&dm->per_thread_data[thread_index].out2in,
103  &out2in_kv, 0);
105  &s->out2in);
106 
108  (dm->addr_pool, 0, thread_index, &out2in_key,
109  dm->port_per_thread, thread_index))
110  ASSERT (0);
111  }
112  else
113  {
115  (dm->addr_pool, 0, thread_index, &out2in_key,
116  dm->port_per_thread, thread_index))
117  {
118  *error = DSLITE_ERROR_OUT_OF_PORTS;
120  }
121  pool_get (dm->per_thread_data[thread_index].sessions, s);
122  memset (s, 0, sizeof (*s));
123  b4->nsessions++;
124 
125  pool_get (dm->per_thread_data[thread_index].list_pool, elt);
126  clib_dlist_init (dm->per_thread_data[thread_index].list_pool,
127  elt - dm->per_thread_data[thread_index].list_pool);
128  elt->value = s - dm->per_thread_data[thread_index].sessions;
129  s->per_b4_index = elt - dm->per_thread_data[thread_index].list_pool;
130  s->per_b4_list_head_index = b4->sessions_per_b4_list_head_index;
131  clib_dlist_addtail (dm->per_thread_data[thread_index].list_pool,
132  s->per_b4_list_head_index,
133  elt - dm->per_thread_data[thread_index].list_pool);
134  }
135 
136  s->in2out = *in2out_key;
137  s->out2in = out2in_key;
138  *sp = s;
139  in2out_kv.key[0] = s->in2out.as_u64[0];
140  in2out_kv.key[1] = s->in2out.as_u64[1];
141  in2out_kv.key[2] = s->in2out.as_u64[2];
142  in2out_kv.value = s - dm->per_thread_data[thread_index].sessions;
143  clib_bihash_add_del_24_8 (&dm->per_thread_data[thread_index].in2out,
144  &in2out_kv, 1);
145  out2in_kv.key = s->out2in.as_u64;
146  out2in_kv.value = s - dm->per_thread_data[thread_index].sessions;
147  clib_bihash_add_del_8_8 (&dm->per_thread_data[thread_index].out2in,
148  &out2in_kv, 1);
149 
150  return next;
151 }
152 
153 static inline u32
155  ip4_header_t * ip4, dslite_session_t ** sp, u32 next,
156  u8 * error, u32 thread_index)
157 {
158  dslite_session_t *s = 0;
159  icmp46_header_t *icmp = ip4_next_header (ip4);
160  clib_bihash_kv_24_8_t kv, value;
162  u32 n = next;
163  icmp_echo_header_t *echo;
164  u32 new_addr, old_addr;
165  u16 old_id, new_id;
166  ip_csum_t sum;
167 
168  if (icmp_is_error_message (icmp))
169  {
171  *error = DSLITE_ERROR_BAD_ICMP_TYPE;
172  goto done;
173  }
174 
175  echo = (icmp_echo_header_t *) (icmp + 1);
176 
177  key.addr = ip4->src_address;
178  key.port = echo->identifier;
179  key.proto = SNAT_PROTOCOL_ICMP;
180  key.softwire_id.as_u64[0] = ip6->src_address.as_u64[0];
181  key.softwire_id.as_u64[1] = ip6->src_address.as_u64[1];
182  key.pad = 0;
183  kv.key[0] = key.as_u64[0];
184  kv.key[1] = key.as_u64[1];
185  kv.key[2] = key.as_u64[2];
186 
187  if (clib_bihash_search_24_8
188  (&dm->per_thread_data[thread_index].in2out, &kv, &value))
189  {
190  n = slow_path (dm, &key, &s, next, error, thread_index);
192  goto done;
193  }
194  else
195  {
196  s =
197  pool_elt_at_index (dm->per_thread_data[thread_index].sessions,
198  value.value);
199  }
200 
201  old_addr = ip4->src_address.as_u32;
202  ip4->src_address = s->out2in.addr;
203  new_addr = ip4->src_address.as_u32;
204  sum = ip4->checksum;
205  sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address);
206  ip4->checksum = ip_csum_fold (sum);
207 
208  old_id = echo->identifier;
209  echo->identifier = new_id = s->out2in.port;
210  sum = icmp->checksum;
211  sum = ip_csum_update (sum, old_id, new_id, icmp_echo_header_t, identifier);
212  icmp->checksum = ip_csum_fold (sum);
213 
214 done:
215  *sp = s;
216  return n;
217 }
218 
219 static inline uword
221  vlib_frame_t * frame, u8 is_slow_path)
222 {
223  u32 n_left_from, *from, *to_next;
224  dslite_in2out_next_t next_index;
225  u32 node_index;
226  vlib_node_runtime_t *error_node;
227  u32 thread_index = vm->thread_index;
228  f64 now = vlib_time_now (vm);
229  dslite_main_t *dm = &dslite_main;
230 
231  node_index =
232  is_slow_path ? dslite_in2out_slowpath_node.
233  index : dslite_in2out_node.index;
234 
235  error_node = vlib_node_get_runtime (vm, node_index);
236 
237  from = vlib_frame_vector_args (frame);
238  n_left_from = frame->n_vectors;
239  next_index = node->cached_next_index;
240 
241  while (n_left_from > 0)
242  {
243  u32 n_left_to_next;
244 
245  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
246 
247  while (n_left_from > 0 && n_left_to_next > 0)
248  {
249  u32 bi0;
250  vlib_buffer_t *b0;
252  ip4_header_t *ip40;
253  ip6_header_t *ip60;
254  u8 error0 = DSLITE_ERROR_IN2OUT;
255  u32 proto0;
256  dslite_session_t *s0 = 0;
257  clib_bihash_kv_24_8_t kv0, value0;
259  udp_header_t *udp0;
260  tcp_header_t *tcp0;
261  ip_csum_t sum0;
262  u32 new_addr0, old_addr0;
263  u16 old_port0, new_port0;
264 
265  /* speculatively enqueue b0 to the current next frame */
266  bi0 = from[0];
267  to_next[0] = bi0;
268  from += 1;
269  to_next += 1;
270  n_left_from -= 1;
271  n_left_to_next -= 1;
272 
273  b0 = vlib_get_buffer (vm, bi0);
274  ip60 = vlib_buffer_get_current (b0);
275 
276  if (PREDICT_FALSE (ip60->protocol != IP_PROTOCOL_IP_IN_IP))
277  {
278  if (ip60->protocol == IP_PROTOCOL_ICMP6)
279  {
281  goto trace0;
282  }
283  error0 = DSLITE_ERROR_BAD_IP6_PROTOCOL;
284  next0 = DSLITE_IN2OUT_NEXT_DROP;
285  goto trace0;
286  }
287 
288  ip40 = vlib_buffer_get_current (b0) + sizeof (ip6_header_t);
289  proto0 = ip_proto_to_snat_proto (ip40->protocol);
290 
291  if (PREDICT_FALSE (proto0 == ~0))
292  {
293  error0 = DSLITE_ERROR_UNSUPPORTED_PROTOCOL;
294  next0 = DSLITE_IN2OUT_NEXT_DROP;
295  goto trace0;
296  }
297 
298  udp0 = ip4_next_header (ip40);
299  tcp0 = (tcp_header_t *) udp0;
300 
301  if (is_slow_path)
302  {
303  if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
304  {
305  next0 =
306  dslite_icmp_in2out (dm, ip60, ip40, &s0, next0, &error0,
307  thread_index);
308  if (PREDICT_FALSE (next0 == DSLITE_IN2OUT_NEXT_DROP))
309  goto trace0;
310 
311  goto accounting0;
312  }
313  }
314  else
315  {
316  if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
317  {
319  goto trace0;
320  }
321  }
322 
323  key0.addr = ip40->src_address;
324  key0.port = udp0->src_port;
325  key0.proto = proto0;
326  key0.softwire_id.as_u64[0] = ip60->src_address.as_u64[0];
327  key0.softwire_id.as_u64[1] = ip60->src_address.as_u64[1];
328  key0.pad = 0;
329  kv0.key[0] = key0.as_u64[0];
330  kv0.key[1] = key0.as_u64[1];
331  kv0.key[2] = key0.as_u64[2];
332 
333  if (clib_bihash_search_24_8
334  (&dm->per_thread_data[thread_index].in2out, &kv0, &value0))
335  {
336  if (is_slow_path)
337  {
338  next0 =
339  slow_path (dm, &key0, &s0, next0, &error0, thread_index);
340  if (PREDICT_FALSE (next0 == DSLITE_IN2OUT_NEXT_DROP))
341  goto trace0;
342  }
343  else
344  {
346  goto trace0;
347  }
348  }
349  else
350  {
351  s0 =
352  pool_elt_at_index (dm->per_thread_data[thread_index].sessions,
353  value0.value);
354  }
355 
356  old_addr0 = ip40->src_address.as_u32;
357  ip40->src_address = s0->out2in.addr;
358  new_addr0 = ip40->src_address.as_u32;
359  sum0 = ip40->checksum;
360  sum0 =
361  ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
362  src_address);
363  ip40->checksum = ip_csum_fold (sum0);
364  if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
365  {
366  old_port0 = tcp0->src_port;
367  tcp0->src_port = s0->out2in.port;
368  new_port0 = tcp0->src_port;
369 
370  sum0 = tcp0->checksum;
371  sum0 =
372  ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
373  dst_address);
374  sum0 =
375  ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
376  length);
377  mss_clamping (&snat_main, tcp0, &sum0);
378  tcp0->checksum = ip_csum_fold (sum0);
379  }
380  else
381  {
382  old_port0 = udp0->src_port;
383  udp0->src_port = s0->out2in.port;
384  udp0->checksum = 0;
385  }
386 
387  accounting0:
388  /* Accounting */
389  s0->last_heard = now;
390  s0->total_pkts++;
391  s0->total_bytes += vlib_buffer_length_in_chain (vm, b0);
392  /* Per-B4 LRU list maintenance */
393  clib_dlist_remove (dm->per_thread_data[thread_index].list_pool,
394  s0->per_b4_index);
395  clib_dlist_addtail (dm->per_thread_data[thread_index].list_pool,
396  s0->per_b4_list_head_index, s0->per_b4_index);
397 
398  ip40->tos =
399  (clib_net_to_host_u32
400  (ip60->ip_version_traffic_class_and_flow_label) & 0x0ff00000) >>
401  20;
402  vlib_buffer_advance (b0, sizeof (ip6_header_t));
403 
404  trace0:
406  && (b0->flags & VLIB_BUFFER_IS_TRACED)))
407  {
408  dslite_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
409  t->next_index = next0;
410  t->session_index = ~0;
411  if (s0)
412  t->session_index =
413  s0 - dm->per_thread_data[thread_index].sessions;
414  }
415 
416  b0->error = error_node->errors[error0];
417 
418  /* verify speculative enqueue, maybe switch current next frame */
419  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
420  n_left_to_next, bi0, next0);
421  }
422  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
423  }
424 
425  return frame->n_vectors;
426 }
427 
428 static uword
430  vlib_frame_t * frame)
431 {
432  return dslite_in2out_node_fn_inline (vm, node, frame, 0);
433 }
434 
435 /* *INDENT-OFF* */
437  .function = dslite_in2out_node_fn,
438  .name = "dslite-in2out",
439  .vector_size = sizeof (u32),
440  .format_trace = format_dslite_trace,
441  .type = VLIB_NODE_TYPE_INTERNAL,
443  .error_strings = dslite_in2out_error_strings,
444  .n_next_nodes = DSLITE_IN2OUT_N_NEXT,
445  /* edit / add dispositions here */
446  .next_nodes = {
447  [DSLITE_IN2OUT_NEXT_DROP] = "error-drop",
448  [DSLITE_IN2OUT_NEXT_IP4_LOOKUP] = "ip4-lookup",
449  [DSLITE_IN2OUT_NEXT_IP6_ICMP] = "ip6-icmp-input",
450  [DSLITE_IN2OUT_NEXT_SLOWPATH] = "dslite-in2out-slowpath",
451  },
452 };
453 /* *INDENT-ON* */
454 
456 
457 static uword
459  vlib_frame_t * frame)
460 {
461  return dslite_in2out_node_fn_inline (vm, node, frame, 1);
462 }
463 
464 /* *INDENT-OFF* */
466  .function = dslite_in2out_slowpath_node_fn,
467  .name = "dslite-in2out-slowpath",
468  .vector_size = sizeof (u32),
469  .format_trace = format_dslite_trace,
470  .type = VLIB_NODE_TYPE_INTERNAL,
472  .error_strings = dslite_in2out_error_strings,
473  .n_next_nodes = DSLITE_IN2OUT_N_NEXT,
474  /* edit / add dispositions here */
475  .next_nodes = {
476  [DSLITE_IN2OUT_NEXT_DROP] = "error-drop",
477  [DSLITE_IN2OUT_NEXT_IP4_LOOKUP] = "ip4-lookup",
478  [DSLITE_IN2OUT_NEXT_IP6_ICMP] = "ip6-lookup",
479  [DSLITE_IN2OUT_NEXT_SLOWPATH] = "dslite-in2out-slowpath",
480  },
481 };
482 /* *INDENT-ON* */
483 
486 
487 /*
488  * fd.io coding-style-patch-verification: ON
489  *
490  * Local Variables:
491  * eval: (c-set-style "gnu")
492  * End:
493  */
static void clib_dlist_init(dlist_elt_t *pool, u32 index)
Definition: dlist.h:36
ip4_address_t src_address
Definition: ip4_packet.h:169
u16 port_per_thread
Definition: dslite.h:88
u8 * format_dslite_trace(u8 *s, va_list *args)
Definition: dslite.c:221
#define PREDICT_TRUE(x)
Definition: clib.h:108
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:21
static f64 vlib_time_now(vlib_main_t *vm)
Definition: main.h:227
u32 thread_index
Definition: main.h:179
uword ip_csum_t
Definition: ip_packet.h:181
vlib_error_t * errors
Vector of errors for this node.
Definition: node.h:472
u32 session_index
Definition: dslite.h:98
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:263
#define pool_get(P, E)
Allocate an object E from a pool P (unspecified alignment).
Definition: pool.h:228
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
memset(h->entries, 0, sizeof(h->entries[0])*entries)
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:37
ip6_address_t addr
Definition: dslite.h:54
static void * ip4_next_header(ip4_header_t *i)
Definition: ip4_packet.h:240
unsigned int u32
Definition: types.h:88
static char * dslite_in2out_error_strings[]
Definition: dslite_in2out.c:30
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:2032
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:343
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:2204
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:464
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:205
#define PREDICT_FALSE(x)
Definition: clib.h:107
vl_api_address_union_t src_address
Definition: ip_types.api:49
snat_address_t * addr_pool
Definition: dslite.h:85
#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:364
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:138
snat_main_t snat_main
Definition: nat.c:37
u64 value
the value
Definition: bihash_8_8.h:34
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:155
u16 n_vectors
Definition: node.h:401
vlib_main_t * vm
Definition: buffer.c:294
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:61
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:455
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:513
#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:218
static void clib_dlist_remove(dlist_elt_t *pool, u32 index)
Definition: dlist.h:99
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:97
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:267
#define ip_csum_update(sum, old, new, type, field)
Definition: ip_packet.h:231
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:18
vlib_node_registration_t dslite_in2out_slowpath_node
(constructor) VLIB_REGISTER_NODE (dslite_in2out_slowpath_node)
Definition: dslite_in2out.c:19
#define foreach_dslite_error
Definition: dslite.h:106
u16 flags
Copy of main node flags.
Definition: node.h:507
clib_bihash_24_8_t in2out
Definition: dslite.h:63
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:310
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:116
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:58
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