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Vector Packet Processing
ip4_source_check.c
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1 /*
2  * Copyright (c) 2015 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  * ip/ip4_source_check.c: IP v4 check source address (unicast RPF check)
17  *
18  * Copyright (c) 2008 Eliot Dresselhaus
19  *
20  * Permission is hereby granted, free of charge, to any person obtaining
21  * a copy of this software and associated documentation files (the
22  * "Software"), to deal in the Software without restriction, including
23  * without limitation the rights to use, copy, modify, merge, publish,
24  * distribute, sublicense, and/or sell copies of the Software, and to
25  * permit persons to whom the Software is furnished to do so, subject to
26  * the following conditions:
27  *
28  * The above copyright notice and this permission notice shall be
29  * included in all copies or substantial portions of the Software.
30  *
31  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38  */
39 
40 #include <vnet/ip/ip.h>
41 #include <vnet/fib/ip4_fib.h>
42 #include <vnet/fib/fib_urpf_list.h>
43 #include <vnet/dpo/load_balance.h>
44 
45 /**
46  * @file
47  * @brief IPv4 Unicast Source Check.
48  *
49  * This file contains the IPv4 interface unicast source check.
50  */
51 
52 
53 typedef struct
54 {
55  u8 packet_data[64];
58 
59 static u8 *
60 format_ip4_source_check_trace (u8 * s, va_list * va)
61 {
62  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
63  CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
65 
66  s = format (s, "%U",
67  format_ip4_header, t->packet_data, sizeof (t->packet_data));
68 
69  return s;
70 }
71 
72 typedef enum
73 {
77 
78 typedef enum
79 {
83 
84 typedef union
85 {
88 
91  vlib_node_runtime_t * node,
92  vlib_frame_t * frame,
93  ip4_source_check_type_t source_check_type)
94 {
95  u32 n_left_from, *from, *to_next;
96  u32 next_index;
97  vlib_node_runtime_t *error_node =
99 
100  from = vlib_frame_vector_args (frame);
101  n_left_from = frame->n_vectors;
102  next_index = node->cached_next_index;
103 
104  if (node->flags & VLIB_NODE_FLAG_TRACE)
105  vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
106  /* stride */ 1,
107  sizeof (ip4_source_check_trace_t));
108 
109  while (n_left_from > 0)
110  {
111  u32 n_left_to_next;
112 
113  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
114 
115  while (n_left_from >= 4 && n_left_to_next >= 2)
116  {
117  vlib_buffer_t *p0, *p1;
118  ip4_header_t *ip0, *ip1;
119  ip4_fib_mtrie_t *mtrie0, *mtrie1;
120  ip4_fib_mtrie_leaf_t leaf0, leaf1;
121  ip4_source_check_config_t *c0, *c1;
122  const load_balance_t *lb0, *lb1;
123  u32 pi0, next0, pass0, lb_index0;
124  u32 pi1, next1, pass1, lb_index1;
125 
126  /* Prefetch next iteration. */
127  {
128  vlib_buffer_t *p2, *p3;
129 
130  p2 = vlib_get_buffer (vm, from[2]);
131  p3 = vlib_get_buffer (vm, from[3]);
132 
133  vlib_prefetch_buffer_header (p2, LOAD);
134  vlib_prefetch_buffer_header (p3, LOAD);
135 
136  CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD);
137  CLIB_PREFETCH (p3->data, sizeof (ip1[0]), LOAD);
138  }
139 
140  pi0 = to_next[0] = from[0];
141  pi1 = to_next[1] = from[1];
142  from += 2;
143  to_next += 2;
144  n_left_from -= 2;
145  n_left_to_next -= 2;
146 
147  p0 = vlib_get_buffer (vm, pi0);
148  p1 = vlib_get_buffer (vm, pi1);
149 
150  ip0 = vlib_buffer_get_current (p0);
151  ip1 = vlib_buffer_get_current (p1);
152 
153  c0 =
154  vnet_feature_next_with_data (vnet_buffer (p0)->sw_if_index
155  [VLIB_RX], &next0, p0,
156  sizeof (c0[0]));
157  c1 =
158  vnet_feature_next_with_data (vnet_buffer (p1)->sw_if_index
159  [VLIB_RX], &next1, p1,
160  sizeof (c1[0]));
161 
162  mtrie0 = &ip4_fib_get (c0->fib_index)->mtrie;
163  mtrie1 = &ip4_fib_get (c1->fib_index)->mtrie;
164 
165  leaf0 = leaf1 = IP4_FIB_MTRIE_LEAF_ROOT;
166 
167  leaf0 =
168  ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 0);
169  leaf1 =
170  ip4_fib_mtrie_lookup_step (mtrie1, leaf1, &ip1->src_address, 0);
171 
172  leaf0 =
173  ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 1);
174  leaf1 =
175  ip4_fib_mtrie_lookup_step (mtrie1, leaf1, &ip1->src_address, 1);
176 
177  leaf0 =
178  ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 2);
179  leaf1 =
180  ip4_fib_mtrie_lookup_step (mtrie1, leaf1, &ip1->src_address, 2);
181 
182  leaf0 =
183  ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 3);
184  leaf1 =
185  ip4_fib_mtrie_lookup_step (mtrie1, leaf1, &ip1->src_address, 3);
186 
187  lb_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0);
188  lb_index1 = ip4_fib_mtrie_leaf_get_adj_index (leaf1);
189 
190  lb0 = load_balance_get (lb_index0);
191  lb1 = load_balance_get (lb_index1);
192 
193  /* Pass multicast. */
194  pass0 = ip4_address_is_multicast (&ip0->src_address)
195  || ip0->src_address.as_u32 == clib_host_to_net_u32 (0xFFFFFFFF);
196  pass1 = ip4_address_is_multicast (&ip1->src_address)
197  || ip1->src_address.as_u32 == clib_host_to_net_u32 (0xFFFFFFFF);
198 
199  if (IP4_SOURCE_CHECK_REACHABLE_VIA_RX == source_check_type)
200  {
201  pass0 |= fib_urpf_check (lb0->lb_urpf,
202  vnet_buffer (p0)->sw_if_index
203  [VLIB_RX]);
204  pass1 |=
205  fib_urpf_check (lb1->lb_urpf,
206  vnet_buffer (p1)->sw_if_index[VLIB_RX]);
207  }
208  else
209  {
210  pass0 |= fib_urpf_check_size (lb0->lb_urpf);
211  pass1 |= fib_urpf_check_size (lb1->lb_urpf);
212  }
213  next0 = (pass0 ? next0 : IP4_SOURCE_CHECK_NEXT_DROP);
214  next1 = (pass1 ? next1 : IP4_SOURCE_CHECK_NEXT_DROP);
215 
216  p0->error =
217  error_node->errors[IP4_ERROR_UNICAST_SOURCE_CHECK_FAILS];
218  p1->error =
219  error_node->errors[IP4_ERROR_UNICAST_SOURCE_CHECK_FAILS];
220 
221  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
222  to_next, n_left_to_next,
223  pi0, pi1, next0, next1);
224  }
225 
226  while (n_left_from > 0 && n_left_to_next > 0)
227  {
228  vlib_buffer_t *p0;
229  ip4_header_t *ip0;
230  ip4_fib_mtrie_t *mtrie0;
231  ip4_fib_mtrie_leaf_t leaf0;
233  u32 pi0, next0, pass0, lb_index0;
234  const load_balance_t *lb0;
235 
236  pi0 = from[0];
237  to_next[0] = pi0;
238  from += 1;
239  to_next += 1;
240  n_left_from -= 1;
241  n_left_to_next -= 1;
242 
243  p0 = vlib_get_buffer (vm, pi0);
244  ip0 = vlib_buffer_get_current (p0);
245 
246  c0 =
247  vnet_feature_next_with_data (vnet_buffer (p0)->sw_if_index
248  [VLIB_RX], &next0, p0,
249  sizeof (c0[0]));
250 
251  mtrie0 = &ip4_fib_get (c0->fib_index)->mtrie;
252 
253  leaf0 = IP4_FIB_MTRIE_LEAF_ROOT;
254 
255  leaf0 =
256  ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 0);
257 
258  leaf0 =
259  ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 1);
260 
261  leaf0 =
262  ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 2);
263 
264  leaf0 =
265  ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 3);
266 
267  lb_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0);
268 
269  lb0 = load_balance_get (lb_index0);
270 
271  /* Pass multicast. */
272  pass0 = ip4_address_is_multicast (&ip0->src_address)
273  || ip0->src_address.as_u32 == clib_host_to_net_u32 (0xFFFFFFFF);
274 
275  if (IP4_SOURCE_CHECK_REACHABLE_VIA_RX == source_check_type)
276  {
277  pass0 |= fib_urpf_check (lb0->lb_urpf,
278  vnet_buffer (p0)->sw_if_index
279  [VLIB_RX]);
280  }
281  else
282  {
283  pass0 |= fib_urpf_check_size (lb0->lb_urpf);
284  }
285 
286  next0 = (pass0 ? next0 : IP4_SOURCE_CHECK_NEXT_DROP);
287  p0->error =
288  error_node->errors[IP4_ERROR_UNICAST_SOURCE_CHECK_FAILS];
289 
290  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
291  to_next, n_left_to_next,
292  pi0, next0);
293  }
294 
295  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
296  }
297 
298  return frame->n_vectors;
299 }
300 
301 static uword
303  vlib_node_runtime_t * node,
304  vlib_frame_t * frame)
305 {
306  return ip4_source_check_inline (vm, node, frame,
308 }
309 
310 static uword
312  vlib_node_runtime_t * node,
313  vlib_frame_t * frame)
314 {
315  return ip4_source_check_inline (vm, node, frame,
317 }
318 
319 /* *INDENT-OFF* */
322  .name = "ip4-source-check-via-any",
323  .vector_size = sizeof (u32),
324 
325  .n_next_nodes = IP4_SOURCE_CHECK_N_NEXT,
326  .next_nodes = {
327  [IP4_SOURCE_CHECK_NEXT_DROP] = "error-drop",
328  },
329 
330  .format_buffer = format_ip4_header,
331  .format_trace = format_ip4_source_check_trace,
332 };
333 /* *INDENT-ON* */
334 
337 
338 /* *INDENT-OFF* */
341  .name = "ip4-source-check-via-rx",
342  .vector_size = sizeof (u32),
343 
344  .n_next_nodes = IP4_SOURCE_CHECK_N_NEXT,
345  .next_nodes = {
346  [IP4_SOURCE_CHECK_NEXT_DROP] = "error-drop",
347  },
348 
349  .format_buffer = format_ip4_header,
350  .format_trace = format_ip4_source_check_trace,
351 };
352 /* *INDENT-ON* */
353 
356 
357 static clib_error_t *
359  unformat_input_t * input, vlib_cli_command_t * cmd)
360 {
361  unformat_input_t _line_input, *line_input = &_line_input;
362  vnet_main_t *vnm = vnet_get_main ();
363  ip4_main_t *im = &ip4_main;
364  clib_error_t *error = 0;
365  u32 sw_if_index, is_del;
367  char *feature_name = "ip4-source-check-via-rx";
368 
369  sw_if_index = ~0;
370  is_del = 0;
371 
372  if (!unformat_user (input, unformat_line_input, line_input))
373  return 0;
374 
375  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
376  {
377  if (unformat_user
378  (line_input, unformat_vnet_sw_interface, vnm, &sw_if_index))
379  ;
380  else if (unformat (line_input, "del"))
381  is_del = 1;
382  else if (unformat (line_input, "loose"))
383  feature_name = "ip4-source-check-via-any";
384  else
385  {
386  error = unformat_parse_error (line_input);
387  goto done;
388  }
389  }
390 
391  if (~0 == sw_if_index)
392  {
393  error = clib_error_return (0, "unknown interface `%U'",
394  format_unformat_error, line_input);
395  goto done;
396  }
397 
398  config.fib_index = im->fib_index_by_sw_if_index[sw_if_index];
399  vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index,
400  is_del == 0, &config, sizeof (config));
401 done:
402  unformat_free (line_input);
403 
404  return error;
405 }
406 
407 /*?
408  * This command adds the 'ip4-source-check-via-rx' graph node for
409  * a given interface. By adding the IPv4 source check graph node to
410  * an interface, the code verifies that the source address of incoming
411  * unicast packets are reachable over the incoming interface. Two flavours
412  * are supported (the default is strict):
413  * - loose: accept ingress packet if there is a route to reach the source
414  * - strict: accept ingress packet if it arrived on an interface which
415  * the route to the source uses. i.e. an interface that the source
416  * is reachable via.
417  *
418  * @cliexpar
419  * @parblock
420  * Example of graph node before range checking is enabled:
421  * @cliexstart{show vlib graph ip4-source-check-via-rx}
422  * Name Next Previous
423  * ip4-source-check-via-rx error-drop [0]
424  * @cliexend
425  *
426  * Example of how to enable unicast source checking on an interface:
427  * @cliexcmd{set interface ip source-check GigabitEthernet2/0/0 loose}
428  *
429  * Example of graph node after range checking is enabled:
430  * @cliexstart{show vlib graph ip4-source-check-via-rx}
431  * Name Next Previous
432  * ip4-source-check-via-rx error-drop [0] ip4-input-no-checksum
433  * ip4-source-and-port-range- ip4-input
434  * @cliexend
435  *
436  * Example of how to display the feature enabed on an interface:
437  * @cliexstart{show ip interface features GigabitEthernet2/0/0}
438  * IP feature paths configured on GigabitEthernet2/0/0...
439  *
440  * ipv4 unicast:
441  * ip4-source-check-via-rx
442  * ip4-lookup
443  *
444  * ipv4 multicast:
445  * ip4-lookup-multicast
446  *
447  * ipv4 multicast:
448  * interface-output
449  *
450  * ipv6 unicast:
451  * ip6-lookup
452  *
453  * ipv6 multicast:
454  * ip6-lookup
455  *
456  * ipv6 multicast:
457  * interface-output
458  * @cliexend
459  *
460  * Example of how to disable unicast source checking on an interface:
461  * @cliexcmd{set interface ip source-check GigabitEthernet2/0/0 del}
462  * @endparblock
463 ?*/
464 /* *INDENT-OFF* */
465 VLIB_CLI_COMMAND (set_interface_ip_source_check_command, static) = {
466  .path = "set interface ip source-check",
467  .function = set_ip_source_check,
468  .short_help = "set interface ip source-check <interface> [strict|loose] [del]",
469 };
470 /* *INDENT-ON* */
471 
472 static clib_error_t *
474  unformat_input_t * input, vlib_cli_command_t * cmd)
475 {
476  unformat_input_t _line_input, *line_input = &_line_input;
477  fib_prefix_t pfx = {
479  };
480  clib_error_t *error = NULL;
481  u32 table_id, is_add, fib_index;
482 
483  is_add = 1;
484  table_id = ~0;
485 
486  /* Get a line of input. */
487  if (!unformat_user (input, unformat_line_input, line_input))
488  return 0;
489 
490  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
491  {
492  if (unformat (line_input, "table %d", &table_id))
493  ;
494  else if (unformat (line_input, "del"))
495  is_add = 0;
496  else if (unformat (line_input, "add"))
497  is_add = 1;
498  else if (unformat (line_input, "%U/%d",
499  unformat_ip4_address, &pfx.fp_addr.ip4, &pfx.fp_len))
501  else
502  {
503  error = unformat_parse_error (line_input);
504  goto done;
505  }
506  }
507 
508  if (~0 != table_id)
509  {
510  fib_index = fib_table_id_find_fib_index (pfx.fp_proto, table_id);
511  if (~0 == fib_index)
512  {
513  error = clib_error_return (0, "Nonexistent table id %d", table_id);
514  goto done;
515  }
516  }
517  else
518  {
519  fib_index = 0;
520  }
521 
522  if (is_add)
523  {
524  fib_table_entry_special_add (fib_index,
525  &pfx,
528  }
529  else
530  {
532  &pfx, FIB_SOURCE_URPF_EXEMPT);
533  }
534 
535 done:
536  unformat_free (line_input);
537 
538  return error;
539 }
540 
541 /*?
542  * Add an exemption for a prefix to pass the Unicast Reverse Path
543  * Forwarding (uRPF) loose check. This is for testing purposes only.
544  * If the '<em>table</em>' is not enter it is defaulted to 0. Default
545  * is to '<em>add</em>'. VPP always performs a loose uRPF check for
546  * for-us traffic.
547  *
548  * @cliexpar
549  * Example of how to add a uRPF exception to a FIB table to pass the
550  * loose RPF tests:
551  * @cliexcmd{ip urpf-accept table 7 add}
552 ?*/
553 /* *INDENT-OFF* */
554 VLIB_CLI_COMMAND (ip_source_check_accept_command, static) = {
555  .path = "ip urpf-accept",
556  .function = ip_source_check_accept,
557  .short_help = "ip urpf-accept [table <table-id>] [add|del]",
558 };
559 /* *INDENT-ON* */
560 
561 
562 /* Dummy init function to get us linked in. */
563 clib_error_t *
565 {
566  return 0;
567 }
568 
570 
571 /*
572  * fd.io coding-style-patch-verification: ON
573  *
574  * Local Variables:
575  * eval: (c-set-style "gnu")
576  * End:
577  */
u32 fib_table_id_find_fib_index(fib_protocol_t proto, u32 table_id)
Definition: lookup.c:360
fib_protocol_t fp_proto
protocol type
Definition: fib_types.h:169
#define CLIB_UNUSED(x)
Definition: clib.h:79
static int fib_urpf_check_size(index_t ui)
Data-Plane function to check the size of an uRPF list, (i.e.
ip4_address_t src_address
Definition: ip4_packet.h:163
vnet_main_t * vnet_get_main(void)
Definition: misc.c:46
format_function_t format_ip4_header
Definition: format.h:86
u32 table_id
Definition: ip4.h:57
#define NULL
Definition: clib.h:55
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
u32 index_t
A Data-Path Object is an object that represents actions that are applied to packets are they are swit...
Definition: dpo.h:41
static int fib_urpf_check(index_t ui, u32 sw_if_index)
Data-Plane function to check an input interface against an uRPF list.
uword unformat_user(unformat_input_t *input, unformat_function_t *func,...)
Definition: unformat.c:982
u32 * fib_index_by_sw_if_index
Table index indexed by software interface.
Definition: ip4.h:120
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:418
unformat_function_t unformat_vnet_sw_interface
vlib_error_t * errors
Vector of errors for this node.
Definition: node.h:418
uRPF bypass/exemption.
Definition: fib_entry.h:114
static ip4_fib_mtrie_leaf_t ip4_fib_mtrie_lookup_step(ip4_fib_mtrie_t *m, ip4_fib_mtrie_leaf_t current_leaf, const ip4_address_t *dst_address, u32 dst_address_byte_index)
Definition: ip4_mtrie.h:164
static clib_error_t * set_ip_source_check(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
unformat_function_t unformat_ip4_address
Definition: format.h:76
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:111
void fib_table_entry_special_remove(u32 fib_index, const fib_prefix_t *prefix, fib_source_t source)
Remove a &#39;special&#39; entry from the FIB.
Definition: fib_table.c:388
#define always_inline
Definition: clib.h:84
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:164
u32 ip4_fib_mtrie_leaf_t
Definition: ip4_mtrie.h:52
Aggregrate type for a prefix.
Definition: fib_types.h:160
#define clib_error_return(e, args...)
Definition: error.h:111
u16 fp_len
The mask length.
Definition: fib_types.h:164
static u32 ip4_fib_mtrie_leaf_get_adj_index(ip4_fib_mtrie_leaf_t n)
Definition: ip4_mtrie.h:76
unformat_function_t unformat_line_input
Definition: format.h:281
static uword ip4_source_check_reachable_via_rx(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
ip4_source_check_next_t
vlib_node_registration_t ip4_input_node
Global ip4 input node.
Definition: ip4_input.c:416
ip46_address_t fp_addr
The address type is not deriveable from the fp_addr member.
Definition: fib_types.h:183
struct _unformat_input_t unformat_input_t
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:188
The FIB DPO provieds;.
Definition: load_balance.h:84
static uword ip4_address_is_multicast(ip4_address_t *a)
Definition: ip4_packet.h:309
vlib_node_registration_t ip4_check_source_reachable_via_rx
(constructor) VLIB_REGISTER_NODE (ip4_check_source_reachable_via_rx)
#define vlib_validate_buffer_enqueue_x2(vm, node, next_index, to_next, n_left_to_next, bi0, bi1, next0, next1)
Finish enqueueing two buffers forward in the graph.
Definition: buffer_node.h:70
VLIB_NODE_FUNCTION_MULTIARCH(ip4_check_source_reachable_via_any, ip4_source_check_reachable_via_any)
#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:216
#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:350
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:113
fib_node_index_t fib_table_entry_special_add(u32 fib_index, const fib_prefix_t *prefix, fib_source_t source, fib_entry_flag_t flags)
Add a &#39;special&#39; entry to the FIB.
Definition: fib_table.c:369
#define UNFORMAT_END_OF_INPUT
Definition: format.h:143
u16 n_vectors
Definition: node.h:344
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:82
vlib_main_t * vm
Definition: buffer.c:276
clib_error_t * ip4_source_check_init(vlib_main_t *vm)
static ip4_fib_t * ip4_fib_get(u32 index)
Get the FIB at the given index.
Definition: ip4_fib.h:80
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:88
Definition: fib_entry.h:230
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:154
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:455
#define IP4_FIB_MTRIE_LEAF_ROOT
Definition: ip4_mtrie.h:55
index_t lb_urpf
This is the index of the uRPF list for this LB.
Definition: load_balance.h:123
unsigned int u32
Definition: types.h:88
static load_balance_t * load_balance_get(index_t lbi)
Definition: load_balance.h:193
static clib_error_t * ip_source_check_accept(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
IPv4 main type.
Definition: ip4.h:107
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:259
u64 uword
Definition: types.h:112
#define unformat_parse_error(input)
Definition: format.h:267
static uword ip4_source_check_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, ip4_source_check_type_t source_check_type)
void vlib_trace_frame_buffers_only(vlib_main_t *vm, vlib_node_runtime_t *node, u32 *buffers, uword n_buffers, uword next_buffer_stride, uword n_buffer_data_bytes_in_trace)
Definition: trace.c:45
unsigned char u8
Definition: types.h:56
ip4_source_check_type_t
static void unformat_free(unformat_input_t *i)
Definition: format.h:161
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:253
ip4_fib_mtrie_t mtrie
Definition: ip4.h:54
static_always_inline void * vnet_feature_next_with_data(u32 sw_if_index, u32 *next0, vlib_buffer_t *b0, u32 n_data_bytes)
Definition: feature.h:208
static uword ip4_source_check_reachable_via_any(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
#define vnet_buffer(b)
Definition: buffer.h:294
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:143
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1117
u8 data[0]
Packet data.
Definition: buffer.h:152
u16 flags
Copy of main node flags.
Definition: node.h:449
vlib_node_registration_t ip4_check_source_reachable_via_any
(constructor) VLIB_REGISTER_NODE (ip4_check_source_reachable_via_any)
static u8 * format_ip4_source_check_trace(u8 *s, va_list *va)
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:57
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:971
Definition: defs.h:46
int vnet_feature_enable_disable(const char *arc_name, const char *node_name, u32 sw_if_index, int enable_disable, void *feature_config, u32 n_feature_config_bytes)
Definition: feature.c:225
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:169