FD.io VPP  v19.08.2-294-g37e99c22d
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 = vnet_feature_next_with_data (&next0, p0, sizeof (c0[0]));
154  c1 = vnet_feature_next_with_data (&next1, p1, sizeof (c1[0]));
155 
156  mtrie0 = &ip4_fib_get (c0->fib_index)->mtrie;
157  mtrie1 = &ip4_fib_get (c1->fib_index)->mtrie;
158 
159  leaf0 = ip4_fib_mtrie_lookup_step_one (mtrie0, &ip0->src_address);
160  leaf1 = ip4_fib_mtrie_lookup_step_one (mtrie1, &ip1->src_address);
161 
162  leaf0 =
163  ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 2);
164  leaf1 =
165  ip4_fib_mtrie_lookup_step (mtrie1, leaf1, &ip1->src_address, 2);
166 
167  leaf0 =
168  ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 3);
169  leaf1 =
170  ip4_fib_mtrie_lookup_step (mtrie1, leaf1, &ip1->src_address, 3);
171 
172  lb_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0);
173  lb_index1 = ip4_fib_mtrie_leaf_get_adj_index (leaf1);
174 
175  lb0 = load_balance_get (lb_index0);
176  lb1 = load_balance_get (lb_index1);
177 
178  /* Pass multicast. */
179  pass0 = ip4_address_is_multicast (&ip0->src_address)
180  || ip0->src_address.as_u32 == clib_host_to_net_u32 (0xFFFFFFFF);
181  pass1 = ip4_address_is_multicast (&ip1->src_address)
182  || ip1->src_address.as_u32 == clib_host_to_net_u32 (0xFFFFFFFF);
183 
184  if (IP4_SOURCE_CHECK_REACHABLE_VIA_RX == source_check_type)
185  {
186  pass0 |= fib_urpf_check (lb0->lb_urpf,
188  [VLIB_RX]);
189  pass1 |=
190  fib_urpf_check (lb1->lb_urpf,
191  vnet_buffer (p1)->sw_if_index[VLIB_RX]);
192  }
193  else
194  {
195  pass0 |= fib_urpf_check_size (lb0->lb_urpf);
196  pass1 |= fib_urpf_check_size (lb1->lb_urpf);
197  }
198  next0 = (pass0 ? next0 : IP4_SOURCE_CHECK_NEXT_DROP);
199  next1 = (pass1 ? next1 : IP4_SOURCE_CHECK_NEXT_DROP);
200 
201  p0->error =
202  error_node->errors[IP4_ERROR_UNICAST_SOURCE_CHECK_FAILS];
203  p1->error =
204  error_node->errors[IP4_ERROR_UNICAST_SOURCE_CHECK_FAILS];
205 
206  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
207  to_next, n_left_to_next,
208  pi0, pi1, next0, next1);
209  }
210 
211  while (n_left_from > 0 && n_left_to_next > 0)
212  {
213  vlib_buffer_t *p0;
214  ip4_header_t *ip0;
215  ip4_fib_mtrie_t *mtrie0;
216  ip4_fib_mtrie_leaf_t leaf0;
218  u32 pi0, next0, pass0, lb_index0;
219  const load_balance_t *lb0;
220 
221  pi0 = from[0];
222  to_next[0] = pi0;
223  from += 1;
224  to_next += 1;
225  n_left_from -= 1;
226  n_left_to_next -= 1;
227 
228  p0 = vlib_get_buffer (vm, pi0);
229  ip0 = vlib_buffer_get_current (p0);
230 
231  c0 = vnet_feature_next_with_data (&next0, p0, sizeof (c0[0]));
232 
233  mtrie0 = &ip4_fib_get (c0->fib_index)->mtrie;
234 
235  leaf0 = ip4_fib_mtrie_lookup_step_one (mtrie0, &ip0->src_address);
236 
237  leaf0 =
238  ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 2);
239 
240  leaf0 =
241  ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 3);
242 
243  lb_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0);
244 
245  lb0 = load_balance_get (lb_index0);
246 
247  /* Pass multicast. */
248  pass0 = ip4_address_is_multicast (&ip0->src_address)
249  || ip0->src_address.as_u32 == clib_host_to_net_u32 (0xFFFFFFFF);
250 
251  if (IP4_SOURCE_CHECK_REACHABLE_VIA_RX == source_check_type)
252  {
253  pass0 |= fib_urpf_check (lb0->lb_urpf,
255  [VLIB_RX]);
256  }
257  else
258  {
259  pass0 |= fib_urpf_check_size (lb0->lb_urpf);
260  }
261 
262  next0 = (pass0 ? next0 : IP4_SOURCE_CHECK_NEXT_DROP);
263  p0->error =
264  error_node->errors[IP4_ERROR_UNICAST_SOURCE_CHECK_FAILS];
265 
266  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
267  to_next, n_left_to_next,
268  pi0, next0);
269  }
270 
271  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
272  }
273 
274  return frame->n_vectors;
275 }
276 
278  vlib_node_runtime_t * node,
279  vlib_frame_t * frame)
280 {
281  return ip4_source_check_inline (vm, node, frame,
283 }
284 
286  vlib_node_runtime_t * node,
287  vlib_frame_t * frame)
288 {
289  return ip4_source_check_inline (vm, node, frame,
291 }
292 
293 /* *INDENT-OFF* */
295  .name = "ip4-source-check-via-any",
296  .vector_size = sizeof (u32),
297 
298  .n_next_nodes = IP4_SOURCE_CHECK_N_NEXT,
299  .next_nodes = {
300  [IP4_SOURCE_CHECK_NEXT_DROP] = "ip4-drop",
301  },
302 
303  .format_buffer = format_ip4_header,
304  .format_trace = format_ip4_source_check_trace,
305 };
306 /* *INDENT-ON* */
307 
308 /* *INDENT-OFF* */
310  .name = "ip4-source-check-via-rx",
311  .vector_size = sizeof (u32),
312 
313  .n_next_nodes = IP4_SOURCE_CHECK_N_NEXT,
314  .next_nodes = {
315  [IP4_SOURCE_CHECK_NEXT_DROP] = "ip4-drop",
316  },
317 
318  .format_buffer = format_ip4_header,
319  .format_trace = format_ip4_source_check_trace,
320 };
321 /* *INDENT-ON* */
322 
323 static clib_error_t *
325  unformat_input_t * input, vlib_cli_command_t * cmd)
326 {
327  unformat_input_t _line_input, *line_input = &_line_input;
328  vnet_main_t *vnm = vnet_get_main ();
329  ip4_main_t *im = &ip4_main;
330  clib_error_t *error = 0;
331  u32 sw_if_index, is_del;
333  char *feature_name = "ip4-source-check-via-rx";
334 
335  sw_if_index = ~0;
336  is_del = 0;
337 
338  if (!unformat_user (input, unformat_line_input, line_input))
339  return 0;
340 
341  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
342  {
343  if (unformat_user
344  (line_input, unformat_vnet_sw_interface, vnm, &sw_if_index))
345  ;
346  else if (unformat (line_input, "del"))
347  is_del = 1;
348  else if (unformat (line_input, "loose"))
349  feature_name = "ip4-source-check-via-any";
350  else
351  {
352  error = unformat_parse_error (line_input);
353  goto done;
354  }
355  }
356 
357  if (~0 == sw_if_index)
358  {
359  error = clib_error_return (0, "unknown interface `%U'",
360  format_unformat_error, line_input);
361  goto done;
362  }
363 
365  vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index,
366  is_del == 0, &config, sizeof (config));
367 done:
368  unformat_free (line_input);
369 
370  return error;
371 }
372 
373 /*?
374  * This command adds the 'ip4-source-check-via-rx' graph node for
375  * a given interface. By adding the IPv4 source check graph node to
376  * an interface, the code verifies that the source address of incoming
377  * unicast packets are reachable over the incoming interface. Two flavours
378  * are supported (the default is strict):
379  * - loose: accept ingress packet if there is a route to reach the source
380  * - strict: accept ingress packet if it arrived on an interface which
381  * the route to the source uses. i.e. an interface that the source
382  * is reachable via.
383  *
384  * @cliexpar
385  * @parblock
386  * Example of graph node before range checking is enabled:
387  * @cliexstart{show vlib graph ip4-source-check-via-rx}
388  * Name Next Previous
389  * ip4-source-check-via-rx ip4-drop [0]
390  * @cliexend
391  *
392  * Example of how to enable unicast source checking on an interface:
393  * @cliexcmd{set interface ip source-check GigabitEthernet2/0/0 loose}
394  *
395  * Example of graph node after range checking is enabled:
396  * @cliexstart{show vlib graph ip4-source-check-via-rx}
397  * Name Next Previous
398  * ip4-source-check-via-rx ip4-drop [0] ip4-input-no-checksum
399  * ip4-source-and-port-range- ip4-input
400  * @cliexend
401  *
402  * Example of how to display the feature enabed on an interface:
403  * @cliexstart{show ip interface features GigabitEthernet2/0/0}
404  * IP feature paths configured on GigabitEthernet2/0/0...
405  *
406  * ipv4 unicast:
407  * ip4-source-check-via-rx
408  * ip4-lookup
409  *
410  * ipv4 multicast:
411  * ip4-lookup-multicast
412  *
413  * ipv4 multicast:
414  * interface-output
415  *
416  * ipv6 unicast:
417  * ip6-lookup
418  *
419  * ipv6 multicast:
420  * ip6-lookup
421  *
422  * ipv6 multicast:
423  * interface-output
424  * @cliexend
425  *
426  * Example of how to disable unicast source checking on an interface:
427  * @cliexcmd{set interface ip source-check GigabitEthernet2/0/0 del}
428  * @endparblock
429 ?*/
430 /* *INDENT-OFF* */
431 VLIB_CLI_COMMAND (set_interface_ip_source_check_command, static) = {
432  .path = "set interface ip source-check",
433  .function = set_ip_source_check,
434  .short_help = "set interface ip source-check <interface> [strict|loose] [del]",
435 };
436 /* *INDENT-ON* */
437 
438 static clib_error_t *
440  unformat_input_t * input, vlib_cli_command_t * cmd)
441 {
442  unformat_input_t _line_input, *line_input = &_line_input;
443  fib_prefix_t pfx = {
445  };
446  clib_error_t *error = NULL;
447  u32 table_id, is_add, fib_index;
448 
449  is_add = 1;
450  table_id = ~0;
451 
452  /* Get a line of input. */
453  if (!unformat_user (input, unformat_line_input, line_input))
454  return 0;
455 
456  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
457  {
458  if (unformat (line_input, "table %d", &table_id))
459  ;
460  else if (unformat (line_input, "del"))
461  is_add = 0;
462  else if (unformat (line_input, "add"))
463  is_add = 1;
464  else if (unformat (line_input, "%U/%d",
465  unformat_ip4_address, &pfx.fp_addr.ip4, &pfx.fp_len))
467  else
468  {
469  error = unformat_parse_error (line_input);
470  goto done;
471  }
472  }
473 
474  if (~0 != table_id)
475  {
476  fib_index = fib_table_find (pfx.fp_proto, table_id);
477  if (~0 == fib_index)
478  {
479  error = clib_error_return (0, "Nonexistent table id %d", table_id);
480  goto done;
481  }
482  }
483  else
484  {
485  fib_index = 0;
486  }
487 
488  if (is_add)
489  {
490  fib_table_entry_special_add (fib_index,
491  &pfx,
494  }
495  else
496  {
498  &pfx, FIB_SOURCE_URPF_EXEMPT);
499  }
500 
501 done:
502  unformat_free (line_input);
503 
504  return error;
505 }
506 
507 /*?
508  * Add an exemption for a prefix to pass the Unicast Reverse Path
509  * Forwarding (uRPF) loose check. This is for testing purposes only.
510  * If the '<em>table</em>' is not enter it is defaulted to 0. Default
511  * is to '<em>add</em>'. VPP always performs a loose uRPF check for
512  * for-us traffic.
513  *
514  * @cliexpar
515  * Example of how to add a uRPF exception to a FIB table to pass the
516  * loose RPF tests:
517  * @cliexcmd{ip urpf-accept table 7 add}
518 ?*/
519 /* *INDENT-OFF* */
520 VLIB_CLI_COMMAND (ip_source_check_accept_command, static) = {
521  .path = "ip urpf-accept",
522  .function = ip_source_check_accept,
523  .short_help = "ip urpf-accept [table <table-id>] [add|del]",
524 };
525 /* *INDENT-ON* */
526 
527 
528 #ifndef CLIB_MARCH_VARIANT
529 /* Dummy init function to get us linked in. */
530 clib_error_t *
532 {
533  return 0;
534 }
535 
537 #endif /* CLIB_MARCH_VARIANT */
538 
539 /*
540  * fd.io coding-style-patch-verification: ON
541  *
542  * Local Variables:
543  * eval: (c-set-style "gnu")
544  * End:
545  */
fib_protocol_t fp_proto
protocol type
Definition: fib_types.h:212
#define CLIB_UNUSED(x)
Definition: clib.h:83
static int fib_urpf_check_size(index_t ui)
Data-Plane function to check the size of an uRPF list, (i.e.
The mutiway-TRIE.
Definition: ip4_mtrie.h:129
ip4_address_t src_address
Definition: ip4_packet.h:170
vnet_main_t * vnet_get_main(void)
Definition: misc.c:46
static ip4_fib_mtrie_leaf_t ip4_fib_mtrie_lookup_step(const ip4_fib_mtrie_t *m, ip4_fib_mtrie_leaf_t current_leaf, const ip4_address_t *dst_address, u32 dst_address_byte_index)
Lookup step.
Definition: ip4_mtrie.h:202
format_function_t format_ip4_header
Definition: format.h:83
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:989
u32 * fib_index_by_sw_if_index
Table index indexed by software interface.
Definition: ip4.h:121
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
unformat_function_t unformat_vnet_sw_interface
#define VLIB_NODE_FN(node)
Definition: node.h:202
static uword ip4_address_is_multicast(const ip4_address_t *a)
Definition: ip4_packet.h:318
vlib_error_t * errors
Vector of errors for this node.
Definition: node.h:470
uRPF bypass/exemption.
Definition: fib_entry.h:135
unsigned char u8
Definition: types.h:56
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:70
vl_api_interface_index_t sw_if_index
Definition: gre.api:50
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:173
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:407
#define always_inline
Definition: clib.h:99
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:203
u32 ip4_fib_mtrie_leaf_t
Definition: ip4_mtrie.h:52
Aggregate type for a prefix.
Definition: fib_types.h:203
#define clib_error_return(e, args...)
Definition: error.h:99
unsigned int u32
Definition: types.h:88
u32 fib_table_find(fib_protocol_t proto, u32 table_id)
Get the index of the FIB for a Table-ID.
Definition: fib_table.c:1080
u16 fp_len
The mask length.
Definition: fib_types.h:207
static u32 ip4_fib_mtrie_leaf_get_adj_index(ip4_fib_mtrie_leaf_t n)
From the stored slot value extract the LB index value.
Definition: ip4_mtrie.h:192
unformat_function_t unformat_line_input
Definition: format.h:283
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:136
static_always_inline void * vnet_feature_next_with_data(u32 *next0, vlib_buffer_t *b0, u32 n_data_bytes)
Definition: feature.h:289
ip4_source_check_next_t
vlib_node_registration_t ip4_input_node
Global ip4 input node.
Definition: ip4_input.c:317
ip46_address_t fp_addr
The address type is not deriveable from the fp_addr member.
Definition: fib_types.h:226
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:229
The FIB DPO provieds;.
Definition: load_balance.h:106
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
#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
ip4_fib_mtrie_t mtrie
Mtrie for fast lookups.
Definition: ip4_fib.h:48
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:388
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
#define UNFORMAT_END_OF_INPUT
Definition: format.h:145
u16 n_vectors
Definition: node.h:397
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:80
vlib_main_t * vm
Definition: buffer.c:323
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:113
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
u8 data[]
Packet data.
Definition: buffer.h:181
Definition: fib_entry.h:284
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:456
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:161
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:515
index_t lb_urpf
This is the index of the uRPF list for this LB.
Definition: load_balance.h:156
static ip4_fib_mtrie_leaf_t ip4_fib_mtrie_lookup_step_one(const ip4_fib_mtrie_t *m, const ip4_address_t *dst_address)
Lookup step number 1.
Definition: ip4_mtrie.h:224
static load_balance_t * load_balance_get(index_t lbi)
Definition: load_balance.h:220
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:105
#define unformat_parse_error(input)
Definition: format.h:269
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:47
VLIB buffer representation.
Definition: buffer.h:102
ip4_source_check_type_t
u64 uword
Definition: types.h:112
static void unformat_free(unformat_input_t *i)
Definition: format.h:163
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:244
#define vnet_buffer(b)
Definition: buffer.h:365
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1076
u16 flags
Copy of main node flags.
Definition: node.h:509
vlib_node_registration_t ip4_check_source_reachable_via_any
(constructor) VLIB_REGISTER_NODE (ip4_check_source_reachable_via_any)
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:302
u32 table_id
Definition: fib_types.api:118
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:85
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:978
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:275
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:171