FD.io VPP  v17.07.01-10-g3be13f0
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 = ip4_fib_mtrie_lookup_step_one (mtrie0, &ip0->src_address);
166  leaf1 = ip4_fib_mtrie_lookup_step_one (mtrie1, &ip1->src_address);
167 
168  leaf0 =
169  ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 2);
170  leaf1 =
171  ip4_fib_mtrie_lookup_step (mtrie1, leaf1, &ip1->src_address, 2);
172 
173  leaf0 =
174  ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 3);
175  leaf1 =
176  ip4_fib_mtrie_lookup_step (mtrie1, leaf1, &ip1->src_address, 3);
177 
178  lb_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0);
179  lb_index1 = ip4_fib_mtrie_leaf_get_adj_index (leaf1);
180 
181  lb0 = load_balance_get (lb_index0);
182  lb1 = load_balance_get (lb_index1);
183 
184  /* Pass multicast. */
185  pass0 = ip4_address_is_multicast (&ip0->src_address)
186  || ip0->src_address.as_u32 == clib_host_to_net_u32 (0xFFFFFFFF);
187  pass1 = ip4_address_is_multicast (&ip1->src_address)
188  || ip1->src_address.as_u32 == clib_host_to_net_u32 (0xFFFFFFFF);
189 
190  if (IP4_SOURCE_CHECK_REACHABLE_VIA_RX == source_check_type)
191  {
192  pass0 |= fib_urpf_check (lb0->lb_urpf,
193  vnet_buffer (p0)->sw_if_index
194  [VLIB_RX]);
195  pass1 |=
196  fib_urpf_check (lb1->lb_urpf,
197  vnet_buffer (p1)->sw_if_index[VLIB_RX]);
198  }
199  else
200  {
201  pass0 |= fib_urpf_check_size (lb0->lb_urpf);
202  pass1 |= fib_urpf_check_size (lb1->lb_urpf);
203  }
204  next0 = (pass0 ? next0 : IP4_SOURCE_CHECK_NEXT_DROP);
205  next1 = (pass1 ? next1 : IP4_SOURCE_CHECK_NEXT_DROP);
206 
207  p0->error =
208  error_node->errors[IP4_ERROR_UNICAST_SOURCE_CHECK_FAILS];
209  p1->error =
210  error_node->errors[IP4_ERROR_UNICAST_SOURCE_CHECK_FAILS];
211 
212  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
213  to_next, n_left_to_next,
214  pi0, pi1, next0, next1);
215  }
216 
217  while (n_left_from > 0 && n_left_to_next > 0)
218  {
219  vlib_buffer_t *p0;
220  ip4_header_t *ip0;
221  ip4_fib_mtrie_t *mtrie0;
222  ip4_fib_mtrie_leaf_t leaf0;
224  u32 pi0, next0, pass0, lb_index0;
225  const load_balance_t *lb0;
226 
227  pi0 = from[0];
228  to_next[0] = pi0;
229  from += 1;
230  to_next += 1;
231  n_left_from -= 1;
232  n_left_to_next -= 1;
233 
234  p0 = vlib_get_buffer (vm, pi0);
235  ip0 = vlib_buffer_get_current (p0);
236 
237  c0 =
238  vnet_feature_next_with_data (vnet_buffer (p0)->sw_if_index
239  [VLIB_RX], &next0, p0,
240  sizeof (c0[0]));
241 
242  mtrie0 = &ip4_fib_get (c0->fib_index)->mtrie;
243 
244  leaf0 = ip4_fib_mtrie_lookup_step_one (mtrie0, &ip0->src_address);
245 
246  leaf0 =
247  ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 2);
248 
249  leaf0 =
250  ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 3);
251 
252  lb_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0);
253 
254  lb0 = load_balance_get (lb_index0);
255 
256  /* Pass multicast. */
257  pass0 = ip4_address_is_multicast (&ip0->src_address)
258  || ip0->src_address.as_u32 == clib_host_to_net_u32 (0xFFFFFFFF);
259 
260  if (IP4_SOURCE_CHECK_REACHABLE_VIA_RX == source_check_type)
261  {
262  pass0 |= fib_urpf_check (lb0->lb_urpf,
263  vnet_buffer (p0)->sw_if_index
264  [VLIB_RX]);
265  }
266  else
267  {
268  pass0 |= fib_urpf_check_size (lb0->lb_urpf);
269  }
270 
271  next0 = (pass0 ? next0 : IP4_SOURCE_CHECK_NEXT_DROP);
272  p0->error =
273  error_node->errors[IP4_ERROR_UNICAST_SOURCE_CHECK_FAILS];
274 
275  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
276  to_next, n_left_to_next,
277  pi0, next0);
278  }
279 
280  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
281  }
282 
283  return frame->n_vectors;
284 }
285 
286 static uword
288  vlib_node_runtime_t * node,
289  vlib_frame_t * frame)
290 {
291  return ip4_source_check_inline (vm, node, frame,
293 }
294 
295 static uword
297  vlib_node_runtime_t * node,
298  vlib_frame_t * frame)
299 {
300  return ip4_source_check_inline (vm, node, frame,
302 }
303 
304 /* *INDENT-OFF* */
307  .name = "ip4-source-check-via-any",
308  .vector_size = sizeof (u32),
309 
310  .n_next_nodes = IP4_SOURCE_CHECK_N_NEXT,
311  .next_nodes = {
312  [IP4_SOURCE_CHECK_NEXT_DROP] = "error-drop",
313  },
314 
315  .format_buffer = format_ip4_header,
316  .format_trace = format_ip4_source_check_trace,
317 };
318 /* *INDENT-ON* */
319 
322 
323 /* *INDENT-OFF* */
326  .name = "ip4-source-check-via-rx",
327  .vector_size = sizeof (u32),
328 
329  .n_next_nodes = IP4_SOURCE_CHECK_N_NEXT,
330  .next_nodes = {
331  [IP4_SOURCE_CHECK_NEXT_DROP] = "error-drop",
332  },
333 
334  .format_buffer = format_ip4_header,
335  .format_trace = format_ip4_source_check_trace,
336 };
337 /* *INDENT-ON* */
338 
341 
342 static clib_error_t *
344  unformat_input_t * input, vlib_cli_command_t * cmd)
345 {
346  unformat_input_t _line_input, *line_input = &_line_input;
347  vnet_main_t *vnm = vnet_get_main ();
348  ip4_main_t *im = &ip4_main;
349  clib_error_t *error = 0;
350  u32 sw_if_index, is_del;
352  char *feature_name = "ip4-source-check-via-rx";
353 
354  sw_if_index = ~0;
355  is_del = 0;
356 
357  if (!unformat_user (input, unformat_line_input, line_input))
358  return 0;
359 
360  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
361  {
362  if (unformat_user
363  (line_input, unformat_vnet_sw_interface, vnm, &sw_if_index))
364  ;
365  else if (unformat (line_input, "del"))
366  is_del = 1;
367  else if (unformat (line_input, "loose"))
368  feature_name = "ip4-source-check-via-any";
369  else
370  {
371  error = unformat_parse_error (line_input);
372  goto done;
373  }
374  }
375 
376  if (~0 == sw_if_index)
377  {
378  error = clib_error_return (0, "unknown interface `%U'",
379  format_unformat_error, line_input);
380  goto done;
381  }
382 
383  config.fib_index = im->fib_index_by_sw_if_index[sw_if_index];
384  vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index,
385  is_del == 0, &config, sizeof (config));
386 done:
387  unformat_free (line_input);
388 
389  return error;
390 }
391 
392 /*?
393  * This command adds the 'ip4-source-check-via-rx' graph node for
394  * a given interface. By adding the IPv4 source check graph node to
395  * an interface, the code verifies that the source address of incoming
396  * unicast packets are reachable over the incoming interface. Two flavours
397  * are supported (the default is strict):
398  * - loose: accept ingress packet if there is a route to reach the source
399  * - strict: accept ingress packet if it arrived on an interface which
400  * the route to the source uses. i.e. an interface that the source
401  * is reachable via.
402  *
403  * @cliexpar
404  * @parblock
405  * Example of graph node before range checking is enabled:
406  * @cliexstart{show vlib graph ip4-source-check-via-rx}
407  * Name Next Previous
408  * ip4-source-check-via-rx error-drop [0]
409  * @cliexend
410  *
411  * Example of how to enable unicast source checking on an interface:
412  * @cliexcmd{set interface ip source-check GigabitEthernet2/0/0 loose}
413  *
414  * Example of graph node after range checking is enabled:
415  * @cliexstart{show vlib graph ip4-source-check-via-rx}
416  * Name Next Previous
417  * ip4-source-check-via-rx error-drop [0] ip4-input-no-checksum
418  * ip4-source-and-port-range- ip4-input
419  * @cliexend
420  *
421  * Example of how to display the feature enabed on an interface:
422  * @cliexstart{show ip interface features GigabitEthernet2/0/0}
423  * IP feature paths configured on GigabitEthernet2/0/0...
424  *
425  * ipv4 unicast:
426  * ip4-source-check-via-rx
427  * ip4-lookup
428  *
429  * ipv4 multicast:
430  * ip4-lookup-multicast
431  *
432  * ipv4 multicast:
433  * interface-output
434  *
435  * ipv6 unicast:
436  * ip6-lookup
437  *
438  * ipv6 multicast:
439  * ip6-lookup
440  *
441  * ipv6 multicast:
442  * interface-output
443  * @cliexend
444  *
445  * Example of how to disable unicast source checking on an interface:
446  * @cliexcmd{set interface ip source-check GigabitEthernet2/0/0 del}
447  * @endparblock
448 ?*/
449 /* *INDENT-OFF* */
450 VLIB_CLI_COMMAND (set_interface_ip_source_check_command, static) = {
451  .path = "set interface ip source-check",
452  .function = set_ip_source_check,
453  .short_help = "set interface ip source-check <interface> [strict|loose] [del]",
454 };
455 /* *INDENT-ON* */
456 
457 static clib_error_t *
459  unformat_input_t * input, vlib_cli_command_t * cmd)
460 {
461  unformat_input_t _line_input, *line_input = &_line_input;
462  fib_prefix_t pfx = {
464  };
465  clib_error_t *error = NULL;
466  u32 table_id, is_add, fib_index;
467 
468  is_add = 1;
469  table_id = ~0;
470 
471  /* Get a line of input. */
472  if (!unformat_user (input, unformat_line_input, line_input))
473  return 0;
474 
475  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
476  {
477  if (unformat (line_input, "table %d", &table_id))
478  ;
479  else if (unformat (line_input, "del"))
480  is_add = 0;
481  else if (unformat (line_input, "add"))
482  is_add = 1;
483  else if (unformat (line_input, "%U/%d",
484  unformat_ip4_address, &pfx.fp_addr.ip4, &pfx.fp_len))
486  else
487  {
488  error = unformat_parse_error (line_input);
489  goto done;
490  }
491  }
492 
493  if (~0 != table_id)
494  {
495  fib_index = fib_table_find (pfx.fp_proto, table_id);
496  if (~0 == fib_index)
497  {
498  error = clib_error_return (0, "Nonexistent table id %d", table_id);
499  goto done;
500  }
501  }
502  else
503  {
504  fib_index = 0;
505  }
506 
507  if (is_add)
508  {
509  fib_table_entry_special_add (fib_index,
510  &pfx,
513  }
514  else
515  {
517  &pfx, FIB_SOURCE_URPF_EXEMPT);
518  }
519 
520 done:
521  unformat_free (line_input);
522 
523  return error;
524 }
525 
526 /*?
527  * Add an exemption for a prefix to pass the Unicast Reverse Path
528  * Forwarding (uRPF) loose check. This is for testing purposes only.
529  * If the '<em>table</em>' is not enter it is defaulted to 0. Default
530  * is to '<em>add</em>'. VPP always performs a loose uRPF check for
531  * for-us traffic.
532  *
533  * @cliexpar
534  * Example of how to add a uRPF exception to a FIB table to pass the
535  * loose RPF tests:
536  * @cliexcmd{ip urpf-accept table 7 add}
537 ?*/
538 /* *INDENT-OFF* */
539 VLIB_CLI_COMMAND (ip_source_check_accept_command, static) = {
540  .path = "ip urpf-accept",
541  .function = ip_source_check_accept,
542  .short_help = "ip urpf-accept [table <table-id>] [add|del]",
543 };
544 /* *INDENT-ON* */
545 
546 
547 /* Dummy init function to get us linked in. */
548 clib_error_t *
550 {
551  return 0;
552 }
553 
555 
556 /*
557  * fd.io coding-style-patch-verification: ON
558  *
559  * Local Variables:
560  * eval: (c-set-style "gnu")
561  * End:
562  */
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.
The mutiway-TRIE.
Definition: ip4_mtrie.h:129
ip4_address_t src_address
Definition: ip4_packet.h:164
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:197
format_function_t format_ip4_header
Definition: format.h:86
#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:983
u32 * fib_index_by_sw_if_index
Table index indexed by software interface.
Definition: ip4.h:99
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
unformat_function_t unformat_vnet_sw_interface
vlib_error_t * errors
Vector of errors for this node.
Definition: node.h:419
uRPF bypass/exemption.
Definition: fib_entry.h:114
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:390
#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:99
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:1025
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)
From the stored slot value extract the LB index value.
Definition: ip4_mtrie.h:187
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:310
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:366
ip4_fib_mtrie_t mtrie
Mtrie for fast lookups.
Definition: ip4_fib.h:45
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:371
#define UNFORMAT_END_OF_INPUT
Definition: format.h:143
u16 n_vectors
Definition: node.h:345
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:82
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:105
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:236
#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:460
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 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:219
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:83
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:260
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:269
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:304
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:144
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1168
u8 data[0]
Packet data.
Definition: buffer.h:152
u16 flags
Copy of main node flags.
Definition: node.h:454
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:972
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