FD.io VPP  v16.09
Vector Packet Processing
icmp4.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/icmp4.c: ipv4 icmp
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 <vlib/vlib.h>
41 #include <vnet/ip/ip.h>
42 #include <vnet/pg/pg.h>
43 
44 
45 static char * icmp_error_strings[] = {
46 #define _(f,s) s,
48 #undef _
49 };
50 
51 static u8 * format_ip4_icmp_type_and_code (u8 * s, va_list * args)
52 {
53  icmp4_type_t type = va_arg (*args, int);
54  u8 code = va_arg (*args, int);
55  char * t = 0;
56 
57 #define _(n,f) case n: t = #f; break;
58 
59  switch (type)
60  {
62 
63  default:
64  break;
65  }
66 
67 #undef _
68 
69  if (! t)
70  return format (s, "unknown 0x%x", type);
71 
72  s = format (s, "%s", t);
73 
74  t = 0;
75  switch ((type << 8) | code)
76  {
77 #define _(a,n,f) case (ICMP4_##a << 8) | (n): t = #f; break;
78 
80 
81 #undef _
82  }
83 
84  if (t)
85  s = format (s, " %s", t);
86 
87  return s;
88 }
89 
90 static u8 * format_ip4_icmp_header (u8 * s, va_list * args)
91 {
92  icmp46_header_t * icmp = va_arg (*args, icmp46_header_t *);
93  u32 max_header_bytes = va_arg (*args, u32);
94 
95  /* Nothing to do. */
96  if (max_header_bytes < sizeof (icmp[0]))
97  return format (s, "ICMP header truncated");
98 
99  s = format (s, "ICMP %U checksum 0x%x",
100  format_ip4_icmp_type_and_code, icmp->type, icmp->code,
101  clib_net_to_host_u16 (icmp->checksum));
102 
103  return s;
104 }
105 
106 static u8 * format_icmp_input_trace (u8 * s, va_list * va)
107 {
108  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
109  CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
110  icmp_input_trace_t * t = va_arg (*va, icmp_input_trace_t *);
111 
112  s = format (s, "%U",
114  t->packet_data, sizeof (t->packet_data));
115 
116  return s;
117 }
118 
119 typedef enum {
123 
124 typedef struct {
126 
128 
129  /* Vector dispatch table indexed by [icmp type]. */
130  u8 ip4_input_next_index_by_type[256];
131 } icmp4_main_t;
132 
134 
135 static uword
137  vlib_node_runtime_t * node,
138  vlib_frame_t * frame)
139 {
140  icmp4_main_t * im = &icmp4_main;
141  uword n_packets = frame->n_vectors;
142  u32 * from, * to_next;
143  u32 n_left_from, n_left_to_next, next;
144 
145  from = vlib_frame_vector_args (frame);
146  n_left_from = n_packets;
147  next = node->cached_next_index;
148 
149  if (node->flags & VLIB_NODE_FLAG_TRACE)
150  vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
151  /* stride */ 1,
152  sizeof (icmp_input_trace_t));
153 
154  while (n_left_from > 0)
155  {
156  vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
157 
158  while (n_left_from > 0 && n_left_to_next > 0)
159  {
160  vlib_buffer_t * p0;
161  ip4_header_t * ip0;
162  icmp46_header_t * icmp0;
163  icmp4_type_t type0;
164  u32 bi0, next0;
165 
166  if (PREDICT_TRUE (n_left_from > 2))
167  {
168  vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
169  p0 = vlib_get_buffer (vm, from[1]);
170  ip0 = vlib_buffer_get_current (p0);
172  }
173 
174  bi0 = to_next[0] = from[0];
175 
176  from += 1;
177  n_left_from -= 1;
178  to_next += 1;
179  n_left_to_next -= 1;
180 
181  p0 = vlib_get_buffer (vm, bi0);
182  ip0 = vlib_buffer_get_current (p0);
183  icmp0 = ip4_next_header (ip0);
184  type0 = icmp0->type;
185  next0 = im->ip4_input_next_index_by_type[type0];
186 
187  p0->error = node->errors[ICMP4_ERROR_UNKNOWN_TYPE];
188  if (PREDICT_FALSE (next0 != next))
189  {
190  vlib_put_next_frame (vm, node, next, n_left_to_next + 1);
191  next = next0;
192  vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
193  to_next[0] = bi0;
194  to_next += 1;
195  n_left_to_next -= 1;
196  }
197  }
198 
199  vlib_put_next_frame (vm, node, next, n_left_to_next);
200  }
201 
202  return frame->n_vectors;
203 }
204 
206  .function = ip4_icmp_input,
207  .name = "ip4-icmp-input",
208 
209  .vector_size = sizeof (u32),
210 
211  .format_trace = format_icmp_input_trace,
212 
213  .n_errors = ARRAY_LEN (icmp_error_strings),
214  .error_strings = icmp_error_strings,
215 
216  .n_next_nodes = 1,
217  .next_nodes = {
218  [ICMP_INPUT_NEXT_ERROR] = "error-punt",
219  },
220 };
221 
222 static uword
224  vlib_node_runtime_t * node,
225  vlib_frame_t * frame)
226 {
227  uword n_packets = frame->n_vectors;
228  u32 * from, * to_next;
229  u32 n_left_from, n_left_to_next, next;
230  ip4_main_t * i4m = &ip4_main;
231  u16 * fragment_ids, * fid;
232  u8 host_config_ttl = i4m->host_config.ttl;
233 
234  from = vlib_frame_vector_args (frame);
235  n_left_from = n_packets;
236  next = node->cached_next_index;
237 
238  if (node->flags & VLIB_NODE_FLAG_TRACE)
239  vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
240  /* stride */ 1,
241  sizeof (icmp_input_trace_t));
242 
243  /* Get random fragment IDs for replies. */
244  fid = fragment_ids = clib_random_buffer_get_data (&vm->random_buffer,
245  n_packets * sizeof (fragment_ids[0]));
246 
247  while (n_left_from > 0)
248  {
249  vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
250 
251  while (n_left_from > 2 && n_left_to_next > 2)
252  {
253  vlib_buffer_t * p0, * p1;
254  ip4_header_t * ip0, * ip1;
255  icmp46_header_t * icmp0, * icmp1;
256  u32 bi0, src0, dst0;
257  u32 bi1, src1, dst1;
258  ip_csum_t sum0, sum1;
259 
260  bi0 = to_next[0] = from[0];
261  bi1 = to_next[1] = from[1];
262 
263  from += 2;
264  n_left_from -= 2;
265  to_next += 2;
266  n_left_to_next -= 2;
267 
268  p0 = vlib_get_buffer (vm, bi0);
269  p1 = vlib_get_buffer (vm, bi1);
270  ip0 = vlib_buffer_get_current (p0);
271  ip1 = vlib_buffer_get_current (p1);
272  icmp0 = ip4_next_header (ip0);
273  icmp1 = ip4_next_header (ip1);
274 
277 
278  /* Update ICMP checksum. */
279  sum0 = icmp0->checksum;
280  sum1 = icmp1->checksum;
281 
282  ASSERT (icmp0->type == ICMP4_echo_request);
283  ASSERT (icmp1->type == ICMP4_echo_request);
284  sum0 = ip_csum_update (sum0, ICMP4_echo_request, ICMP4_echo_reply,
285  icmp46_header_t, type);
286  sum1 = ip_csum_update (sum1, ICMP4_echo_request, ICMP4_echo_reply,
287  icmp46_header_t, type);
288  icmp0->type = ICMP4_echo_reply;
289  icmp1->type = ICMP4_echo_reply;
290 
291  icmp0->checksum = ip_csum_fold (sum0);
292  icmp1->checksum = ip_csum_fold (sum1);
293 
294  src0 = ip0->src_address.data_u32;
295  src1 = ip1->src_address.data_u32;
296  dst0 = ip0->dst_address.data_u32;
297  dst1 = ip1->dst_address.data_u32;
298 
299  /* Swap source and destination address.
300  Does not change checksum. */
301  ip0->src_address.data_u32 = dst0;
302  ip1->src_address.data_u32 = dst1;
303  ip0->dst_address.data_u32 = src0;
304  ip1->dst_address.data_u32 = src1;
305 
306  /* Update IP checksum. */
307  sum0 = ip0->checksum;
308  sum1 = ip1->checksum;
309 
310  sum0 = ip_csum_update (sum0, ip0->ttl, host_config_ttl,
311  ip4_header_t, ttl);
312  sum1 = ip_csum_update (sum1, ip1->ttl, host_config_ttl,
313  ip4_header_t, ttl);
314  ip0->ttl = host_config_ttl;
315  ip1->ttl = host_config_ttl;
316 
317  /* New fragment id. */
318  sum0 = ip_csum_update (sum0, ip0->fragment_id, fid[0],
319  ip4_header_t, fragment_id);
320  sum1 = ip_csum_update (sum1, ip1->fragment_id, fid[1],
321  ip4_header_t, fragment_id);
322  ip0->fragment_id = fid[0];
323  ip1->fragment_id = fid[1];
324  fid += 2;
325 
326  ip0->checksum = ip_csum_fold (sum0);
327  ip1->checksum = ip_csum_fold (sum1);
328 
329  ASSERT (ip0->checksum == ip4_header_checksum (ip0));
330  ASSERT (ip1->checksum == ip4_header_checksum (ip1));
331  }
332 
333  while (n_left_from > 0 && n_left_to_next > 0)
334  {
335  vlib_buffer_t * p0;
336  ip4_header_t * ip0;
337  icmp46_header_t * icmp0;
338  u32 bi0, src0, dst0;
339  ip_csum_t sum0;
340 
341  bi0 = to_next[0] = from[0];
342 
343  from += 1;
344  n_left_from -= 1;
345  to_next += 1;
346  n_left_to_next -= 1;
347 
348  p0 = vlib_get_buffer (vm, bi0);
349  ip0 = vlib_buffer_get_current (p0);
350  icmp0 = ip4_next_header (ip0);
351 
353 
354  /* Update ICMP checksum. */
355  sum0 = icmp0->checksum;
356 
357  ASSERT (icmp0->type == ICMP4_echo_request);
358  sum0 = ip_csum_update (sum0, ICMP4_echo_request, ICMP4_echo_reply,
359  icmp46_header_t, type);
360  icmp0->type = ICMP4_echo_reply;
361  icmp0->checksum = ip_csum_fold (sum0);
362 
363  src0 = ip0->src_address.data_u32;
364  dst0 = ip0->dst_address.data_u32;
365  ip0->src_address.data_u32 = dst0;
366  ip0->dst_address.data_u32 = src0;
367 
368  /* Update IP checksum. */
369  sum0 = ip0->checksum;
370 
371  sum0 = ip_csum_update (sum0, ip0->ttl, host_config_ttl,
372  ip4_header_t, ttl);
373  ip0->ttl = host_config_ttl;
374 
375  sum0 = ip_csum_update (sum0, ip0->fragment_id, fid[0],
376  ip4_header_t, fragment_id);
377  ip0->fragment_id = fid[0];
378  fid += 1;
379 
380  ip0->checksum = ip_csum_fold (sum0);
381 
382  ASSERT (ip0->checksum == ip4_header_checksum (ip0));
383  }
384 
385  vlib_put_next_frame (vm, node, next, n_left_to_next);
386  }
387 
389  ICMP4_ERROR_ECHO_REPLIES_SENT,
390  frame->n_vectors);
391 
392  return frame->n_vectors;
393 }
394 
396  .function = ip4_icmp_echo_request,
397  .name = "ip4-icmp-echo-request",
398 
399  .vector_size = sizeof (u32),
400 
401  .format_trace = format_icmp_input_trace,
402 
403  .n_next_nodes = 1,
404  .next_nodes = {
405  [0] = "ip4-rewrite-local",
406  },
407 };
408 
409 typedef enum {
414 
415 void
417 {
418  vnet_buffer(b)->ip.icmp.type = type;
419  vnet_buffer(b)->ip.icmp.code = code;
420  vnet_buffer(b)->ip.icmp.data = data;
421 }
422 
423 static u8
425 {
426  switch (type) {
427  case ICMP4_destination_unreachable:
428  return ICMP4_ERROR_DEST_UNREACH_SENT;
429  case ICMP4_time_exceeded:
430  return ICMP4_ERROR_TTL_EXPIRE_SENT;
431  case ICMP4_parameter_problem:
432  return ICMP4_ERROR_PARAM_PROBLEM_SENT;
433  default:
434  return ICMP4_ERROR_DROP;
435  }
436 }
437 
438 static uword
440  vlib_node_runtime_t * node,
441  vlib_frame_t * frame)
442 {
443  u32 * from, * to_next;
444  uword n_left_from, n_left_to_next;
445  ip4_icmp_error_next_t next_index;
446  ip4_main_t *im = &ip4_main;
447  ip_lookup_main_t * lm = &im->lookup_main;
448 
449  from = vlib_frame_vector_args(frame);
450  n_left_from = frame->n_vectors;
451  next_index = node->cached_next_index;
452 
453  if (node->flags & VLIB_NODE_FLAG_TRACE)
454  vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
455  /* stride */ 1, sizeof (icmp_input_trace_t));
456 
457  while (n_left_from > 0) {
458  vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
459 
460  while (n_left_from > 0 && n_left_to_next > 0) {
461  u32 pi0 = from[0];
463  u8 error0 = ICMP4_ERROR_NONE;
464  vlib_buffer_t * p0;
465  ip4_header_t * ip0, * out_ip0;
466  icmp46_header_t * icmp0;
467  u32 sw_if_index0, if_add_index0;
468  ip_csum_t sum;
469 
470  /* Speculatively enqueue p0 to the current next frame */
471  to_next[0] = pi0;
472  from += 1;
473  to_next += 1;
474  n_left_from -= 1;
475  n_left_to_next -= 1;
476 
477  p0 = vlib_get_buffer(vm, pi0);
478  ip0 = vlib_buffer_get_current(p0);
479  sw_if_index0 = vnet_buffer(p0)->sw_if_index[VLIB_RX];
480 
481  /*
482  * RFC1812 says to keep as much of the original packet as
483  * possible within the minimum MTU (576). We cheat "a little"
484  * here by keeping whatever fits in the first buffer, to be more
485  * efficient
486  */
488  /* clear current_length of all other buffers in chain */
489  vlib_buffer_t *b = p0;
491  while (b->flags & VLIB_BUFFER_NEXT_PRESENT) {
492  b = vlib_get_buffer (vm, b->next_buffer);
493  b->current_length = 0;
494  }
495  }
496  p0->current_length = p0->current_length > 576 ? 576 : p0->current_length;
497 
498  /* Add IP header and ICMPv4 header including a 4 byte data field */
500  -sizeof(ip4_header_t)-sizeof(icmp46_header_t)-4);
501  out_ip0 = vlib_buffer_get_current(p0);
502  icmp0 = (icmp46_header_t *) &out_ip0[1];
503 
504  /* Fill ip header fields */
505  out_ip0->ip_version_and_header_length = 0x45;
506  out_ip0->tos = 0;
507  out_ip0->length = clib_host_to_net_u16(p0->current_length);
508  out_ip0->fragment_id = 0;
509  out_ip0->flags_and_fragment_offset = 0;
510  out_ip0->ttl = 0xff;
511  out_ip0->protocol = IP_PROTOCOL_ICMP;
512  out_ip0->dst_address = ip0->src_address;
513  if_add_index0 =
514  lm->if_address_pool_index_by_sw_if_index[sw_if_index0];
515  if (PREDICT_TRUE(if_add_index0 != ~0)) {
516  ip_interface_address_t *if_add =
517  pool_elt_at_index(lm->if_address_pool, if_add_index0);
518  ip4_address_t *if_ip =
520  out_ip0->src_address = *if_ip;
521  } else {
522  /* interface has no IP4 address - should not happen */
523  next0 = IP4_ICMP_ERROR_NEXT_DROP;
524  error0 = ICMP4_ERROR_DROP;
525  }
526  out_ip0->checksum = ip4_header_checksum(out_ip0);
527 
528  /* Fill icmp header fields */
529  icmp0->type = vnet_buffer(p0)->ip.icmp.type;
530  icmp0->code = vnet_buffer(p0)->ip.icmp.code;
531  *((u32 *)(icmp0 + 1)) = clib_host_to_net_u32(vnet_buffer(p0)->ip.icmp.data);
532  icmp0->checksum = 0;
533  sum = ip_incremental_checksum(0, icmp0, p0->current_length - sizeof(ip4_header_t));
534  icmp0->checksum = ~ip_csum_fold(sum);
535 
536  /* Update error status */
537  if (error0 == ICMP4_ERROR_NONE)
538  error0 = icmp4_icmp_type_to_error(icmp0->type);
539  vlib_error_count(vm, node->node_index, error0, 1);
540 
541  /* Verify speculative enqueue, maybe switch current next frame */
542  vlib_validate_buffer_enqueue_x1(vm, node, next_index,
543  to_next, n_left_to_next,
544  pi0, next0);
545  }
546  vlib_put_next_frame(vm, node, next_index, n_left_to_next);
547  }
548 
549  return frame->n_vectors;
550 }
551 
553  .function = ip4_icmp_error,
554  .name = "ip4-icmp-error",
555  .vector_size = sizeof (u32),
556 
557  .n_errors = ARRAY_LEN (icmp_error_strings),
558  .error_strings = icmp_error_strings,
559 
560  .n_next_nodes = IP4_ICMP_ERROR_N_NEXT,
561  .next_nodes = {
562  [IP4_ICMP_ERROR_NEXT_DROP] = "error-drop",
563  [IP4_ICMP_ERROR_NEXT_LOOKUP] = "ip4-lookup",
564  },
565 
566  .format_trace = format_icmp_input_trace,
567 };
568 
569 
570 static uword unformat_icmp_type_and_code (unformat_input_t * input, va_list * args)
571 {
572  icmp46_header_t * h = va_arg (*args, icmp46_header_t *);
573  icmp4_main_t * cm = &icmp4_main;
574  u32 i;
575 
577  cm->type_and_code_by_name, &i))
578  {
579  h->type = (i >> 8) & 0xff;
580  h->code = (i >> 0) & 0xff;
581  }
583  cm->type_by_name, &i))
584  {
585  h->type = i;
586  h->code = 0;
587  }
588  else
589  return 0;
590 
591  return 1;
592 }
593 
594 static void
596  pg_stream_t * s,
597  pg_edit_group_t * g,
598  u32 * packets,
599  u32 n_packets)
600 {
601  vlib_main_t * vm = pg->vlib_main;
602  u32 ip_offset, icmp_offset;
603 
604  icmp_offset = g->start_byte_offset;
605  ip_offset = (g-1)->start_byte_offset;
606 
607  while (n_packets >= 1)
608  {
609  vlib_buffer_t * p0;
610  ip4_header_t * ip0;
611  icmp46_header_t * icmp0;
612  u32 len0;
613 
614  p0 = vlib_get_buffer (vm, packets[0]);
615  n_packets -= 1;
616  packets += 1;
617 
618  ASSERT (p0->current_data == 0);
619  ip0 = (void *) (p0->data + ip_offset);
620  icmp0 = (void *) (p0->data + icmp_offset);
621  len0 = clib_net_to_host_u16 (ip0->length) - ip4_header_bytes (ip0);
622  icmp0->checksum = ~ ip_csum_fold (ip_incremental_checksum (0, icmp0, len0));
623  }
624 }
625 
626 typedef struct {
630 
631 always_inline void
633 {
634  /* Initialize fields that are not bit fields in the IP header. */
635 #define _(f) pg_edit_init (&p->f, icmp46_header_t, f);
636  _ (type);
637  _ (code);
638  _ (checksum);
639 #undef _
640 }
641 
642 static uword
643 unformat_pg_icmp_header (unformat_input_t * input, va_list * args)
644 {
645  pg_stream_t * s = va_arg (*args, pg_stream_t *);
646  pg_icmp46_header_t * p;
647  u32 group_index;
648 
649  p = pg_create_edit_group (s, sizeof (p[0]), sizeof (icmp46_header_t),
650  &group_index);
652 
654 
655  {
656  icmp46_header_t tmp;
657 
658  if (! unformat (input, "ICMP %U", unformat_icmp_type_and_code, &tmp))
659  goto error;
660 
661  pg_edit_set_fixed (&p->type, tmp.type);
662  pg_edit_set_fixed (&p->code, tmp.code);
663  }
664 
665  /* Parse options. */
666  while (1)
667  {
668  if (unformat (input, "checksum %U",
671  ;
672 
673  /* Can't parse input: try next protocol level. */
674  else
675  break;
676  }
677 
678  if (! unformat_user (input, unformat_pg_payload, s))
679  goto error;
680 
682  {
683  pg_edit_group_t * g = pg_stream_get_group (s, group_index);
685  g->edit_function_opaque = 0;
686  }
687 
688  return 1;
689 
690  error:
691  /* Free up any edits we may have added. */
692  pg_free_edit_group (s);
693  return 0;
694 }
695 
697  u32 node_index)
698 {
699  icmp4_main_t * im = &icmp4_main;
700 
701  ASSERT ((int)type < ARRAY_LEN (im->ip4_input_next_index_by_type));
703  = vlib_node_add_next (vm, ip4_icmp_input_node.index, node_index);
704 }
705 
706 static clib_error_t *
708 {
709  ip_main_t * im = &ip_main;
710  ip_protocol_info_t * pi;
711  icmp4_main_t * cm = &icmp4_main;
712  clib_error_t * error;
713 
715 
716  if (error)
717  return error;
718 
719  pi = ip_get_protocol_info (im, IP_PROTOCOL_ICMP);
722 
723  cm->type_by_name = hash_create_string (0, sizeof (uword));
724 #define _(n,t) hash_set_mem (cm->type_by_name, #t, (n));
726 #undef _
727 
728  cm->type_and_code_by_name = hash_create_string (0, sizeof (uword));
729 #define _(a,n,t) hash_set_mem (cm->type_by_name, #t, (n) | (ICMP4_##a << 8));
731 #undef _
732 
733  memset (cm->ip4_input_next_index_by_type,
735  sizeof (cm->ip4_input_next_index_by_type));
736 
737  ip4_icmp_register_type (vm, ICMP4_echo_request, ip4_icmp_echo_request_node.index);
738 
739  return 0;
740 }
741 
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:457
Definition: edit.h:63
ip4_icmp_error_next_t
Definition: icmp4.c:409
sll srl srl sll sra u16x4 i
Definition: vector_sse2.h:343
static uword ip4_icmp_error(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: icmp4.c:439
#define CLIB_UNUSED(x)
Definition: clib.h:79
uword unformat(unformat_input_t *i, char *fmt,...)
Definition: unformat.c:966
ip4_address_t src_address
Definition: ip4_packet.h:138
ip_interface_address_t * if_address_pool
Pool of addresses that are assigned to interfaces.
Definition: lookup.h:439
bad routing header type(not 4)") sr_error (NO_MORE_SEGMENTS
static u8 * format_icmp_input_trace(u8 *s, va_list *va)
Definition: icmp4.c:106
Definition: pg.h:302
static void pg_edit_set_fixed(pg_edit_t *e, u64 value)
Definition: edit.h:149
#define PREDICT_TRUE(x)
Definition: clib.h:98
static void vlib_error_count(vlib_main_t *vm, uword node_index, uword counter, uword increment)
Definition: error_funcs.h:55
static int ip4_header_bytes(ip4_header_t *i)
Definition: ip4_packet.h:186
static void * clib_random_buffer_get_data(clib_random_buffer_t *b, uword n_bytes)
Definition: random_buffer.h:78
static char * icmp_error_strings[]
Definition: icmp4.c:45
uword unformat_pg_edit(unformat_input_t *input, va_list *args)
Definition: edit.c:106
ip_lookup_main_t lookup_main
Definition: ip4.h:115
uword ip_csum_t
Definition: ip_packet.h:86
u16 flags_and_fragment_offset
Definition: ip4_packet.h:121
Definition: ip.h:109
vlib_error_t * errors
Definition: node.h:418
pg_edit_t code
Definition: icmp4.c:627
static uword vlib_node_add_next(vlib_main_t *vm, uword node, uword next_node)
Definition: node_funcs.h:1061
u32 start_byte_offset
Definition: pg.h:66
static pg_edit_group_t * pg_stream_get_group(pg_stream_t *s, u32 group_index)
Definition: pg.h:216
unformat_function_t * unformat_pg_edit
Definition: ip.h:91
i16 current_data
signed offset in data[], pre_data[] that we are currently processing.
Definition: buffer.h:78
#define vlib_prefetch_buffer_with_index(vm, bi, type)
Prefetch buffer metadata by buffer index The first 64 bytes of buffer contains most header informatio...
Definition: buffer_funcs.h:182
ip_csum_t ip_incremental_checksum(ip_csum_t sum, void *_data, uword n_bytes)
Definition: ip_checksum.c:43
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:111
u32 local_interface_sw_if_index
Definition: vnet.h:62
#define always_inline
Definition: clib.h:84
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:187
static uword unformat_icmp_type_and_code(unformat_input_t *input, va_list *args)
Definition: icmp4.c:570
ip4_address_t dst_address
Definition: ip4_packet.h:138
uword unformat_pg_payload(unformat_input_t *input, va_list *args)
Definition: edit.c:127
pg_edit_type_t type
Definition: edit.h:64
static void * ip4_next_header(ip4_header_t *i)
Definition: ip4_packet.h:190
uword unformat_user(unformat_input_t *input, unformat_function_t *func,...)
Definition: unformat.c:977
static void * pg_create_edit_group(pg_stream_t *s, int n_edit_bytes, int n_packet_bytes, u32 *group_index)
Definition: pg.h:220
#define vlib_call_init_function(vm, x)
Definition: init.h:161
#define hash_create_string(elts, value_bytes)
Definition: hash.h:641
#define VLIB_BUFFER_NEXT_PRESENT
Definition: buffer.h:95
void ip4_icmp_register_type(vlib_main_t *vm, icmp4_type_t type, u32 node_index)
Definition: icmp4.c:696
static clib_error_t * icmp4_init(vlib_main_t *vm)
Definition: icmp4.c:707
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:369
struct ip4_main_t::@126 host_config
Template information for VPP generated packets.
static ip_protocol_info_t * ip_get_protocol_info(ip_main_t *im, u32 protocol)
Definition: ip.h:136
u16 current_length
Nbytes between current data and the end of this buffer.
Definition: buffer.h:82
pg_edit_t type
Definition: icmp4.c:627
format_function_t * format_header
Definition: ip.h:82
static uword unformat_pg_icmp_header(unformat_input_t *input, va_list *args)
Definition: icmp4.c:643
#define PREDICT_FALSE(x)
Definition: clib.h:97
vnet_main_t vnet_main
Definition: misc.c:42
static u8 * format_ip4_icmp_type_and_code(u8 *s, va_list *args)
Definition: icmp4.c:51
icmp4_main_t icmp4_main
Definition: icmp4.c:133
#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:130
#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:348
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:118
static void icmp4_pg_edit_function(pg_main_t *pg, pg_stream_t *s, pg_edit_group_t *g, u32 *packets, u32 n_packets)
Definition: icmp4.c:595
clib_error_t * ip_main_init(vlib_main_t *vm)
Definition: ip_init.c:45
u16 n_vectors
Definition: node.h:344
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:82
ip_main_t ip_main
Definition: ip_init.c:42
static u8 * format_ip4_icmp_header(u8 *s, va_list *args)
Definition: icmp4.c:90
void icmp4_error_set_vnet_buffer(vlib_buffer_t *b, u8 type, u8 code, u32 data)
Definition: icmp4.c:416
uword * type_by_name
Definition: icmp4.c:127
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:200
uword * type_and_code_by_name
Definition: icmp4.c:125
icmp4_type_t
uword unformat_vlib_number_by_name(unformat_input_t *input, va_list *args)
Definition: format.c:157
icmp_input_next_t
Definition: icmp4.c:119
#define ARRAY_LEN(x)
Definition: clib.h:59
static uword ip4_icmp_echo_request(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: icmp4.c:223
pg_edit_t checksum
Definition: icmp4.c:628
u32 * if_address_pool_index_by_sw_if_index
Head of doubly linked list of interface addresses for each software interface.
Definition: lookup.h:446
u16 cached_next_index
Definition: node.h:462
#define ASSERT(truth)
format_function_t format_ip4_header
Definition: format.h:78
vlib_main_t * vlib_main
Definition: pg.h:304
unsigned int u32
Definition: types.h:88
static vlib_node_registration_t ip4_icmp_echo_request_node
(constructor) VLIB_REGISTER_NODE (ip4_icmp_echo_request_node)
Definition: icmp4.c:395
#define vnet_buffer(b)
Definition: buffer.h:335
u8 * format(u8 *s, char *fmt,...)
Definition: format.c:418
IPv4 main type.
Definition: ip4.h:114
u32 next_buffer
Next buffer for this linked-list of buffers.
Definition: buffer.h:114
static void pg_free_edit_group(pg_stream_t *s)
Definition: pg.h:275
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:259
uword edit_function_opaque
Definition: pg.h:79
Definition: pg.h:95
u64 uword
Definition: types.h:112
u32 total_length_not_including_first_buffer
Only valid for first buffer in chain.
Definition: buffer.h:109
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 short u16
Definition: types.h:57
void(* edit_function)(struct pg_main_t *pg, struct pg_stream_t *s, struct pg_edit_group_t *g, u32 *buffers, u32 n_buffers)
Definition: pg.h:72
unsigned char u8
Definition: types.h:56
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:251
#define ip_csum_update(sum, old, new, type, field)
Definition: ip_packet.h:133
vlib_node_registration_t ip4_icmp_error_node
(constructor) VLIB_REGISTER_NODE (ip4_icmp_error_node)
Definition: icmp4.c:552
uword unformat_pg_number(unformat_input_t *input, va_list *args)
Definition: edit.c:84
static vlib_node_registration_t ip4_icmp_input_node
(constructor) VLIB_REGISTER_NODE (ip4_icmp_input_node)
Definition: icmp4.c:205
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:143
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1578
u8 data[0]
Packet data.
Definition: buffer.h:151
u8 ip4_input_next_index_by_type[256]
Definition: icmp4.c:130
u8 packet_data[64]
Definition: icmp4.h:41
u8 ip_version_and_header_length
Definition: ip4_packet.h:108
struct _unformat_input_t unformat_input_t
static void * ip_interface_address_get_address(ip_lookup_main_t *lm, ip_interface_address_t *a)
Definition: lookup.h:601
static uword ip4_icmp_input(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: icmp4.c:136
static u8 icmp4_icmp_type_to_error(u8 type)
Definition: icmp4.c:424
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:67
u32 flags
buffer flags: VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:85
static void pg_icmp_header_init(pg_icmp46_header_t *p)
Definition: icmp4.c:632
u8 ttl
TTL to use for host generated packets.
Definition: ip4.h:176
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:69
static u16 ip4_header_checksum(ip4_header_t *i)
Definition: ip4_packet.h:194
clib_random_buffer_t random_buffer
Definition: main.h:153
static u16 ip_csum_fold(ip_csum_t c)
Definition: ip_packet.h:138
Definition: defs.h:46