FD.io VPP  v20.01-48-g3e0dafb74
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 static char *icmp_error_strings[] = {
45 #define _(f,s) s,
47 #undef _
48 };
49 
50 static u8 *
51 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 *
91 format_ip4_icmp_header (u8 * s, va_list * args)
92 {
93  icmp46_header_t *icmp = va_arg (*args, icmp46_header_t *);
94  u32 max_header_bytes = va_arg (*args, u32);
95 
96  /* Nothing to do. */
97  if (max_header_bytes < sizeof (icmp[0]))
98  return format (s, "ICMP header truncated");
99 
100  s = format (s, "ICMP %U checksum 0x%x",
101  format_ip4_icmp_type_and_code, icmp->type, icmp->code,
102  clib_net_to_host_u16 (icmp->checksum));
103 
104  return s;
105 }
106 
107 static u8 *
108 format_icmp_input_trace (u8 * s, va_list * va)
109 {
110  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
111  CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
112  icmp_input_trace_t *t = va_arg (*va, icmp_input_trace_t *);
113 
114  s = format (s, "%U",
115  format_ip4_header, t->packet_data, sizeof (t->packet_data));
116 
117  return s;
118 }
119 
120 typedef enum
121 {
125 
126 typedef struct
127 {
129 
131 
132  /* Vector dispatch table indexed by [icmp type]. */
133  u8 ip4_input_next_index_by_type[256];
134 } icmp4_main_t;
135 
137 
138 static uword
141 {
142  icmp4_main_t *im = &icmp4_main;
143  uword n_packets = frame->n_vectors;
144  u32 *from, *to_next;
145  u32 n_left_from, n_left_to_next, next;
146 
147  from = vlib_frame_vector_args (frame);
148  n_left_from = n_packets;
149  next = node->cached_next_index;
150 
151  if (node->flags & VLIB_NODE_FLAG_TRACE)
152  vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
153  /* stride */ 1,
154  sizeof (icmp_input_trace_t));
155 
156  while (n_left_from > 0)
157  {
158  vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
159 
160  while (n_left_from > 0 && n_left_to_next > 0)
161  {
162  vlib_buffer_t *p0;
163  ip4_header_t *ip0;
164  icmp46_header_t *icmp0;
165  icmp4_type_t type0;
166  u32 bi0, next0;
167 
168  if (PREDICT_TRUE (n_left_from > 2))
169  {
170  vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
171  p0 = vlib_get_buffer (vm, from[1]);
172  ip0 = vlib_buffer_get_current (p0);
174  }
175 
176  bi0 = to_next[0] = from[0];
177 
178  from += 1;
179  n_left_from -= 1;
180  to_next += 1;
181  n_left_to_next -= 1;
182 
183  p0 = vlib_get_buffer (vm, bi0);
184  ip0 = vlib_buffer_get_current (p0);
185  icmp0 = ip4_next_header (ip0);
186  type0 = icmp0->type;
187  next0 = im->ip4_input_next_index_by_type[type0];
188 
189  p0->error = node->errors[ICMP4_ERROR_UNKNOWN_TYPE];
190 
191  /* Verify speculative enqueue, maybe switch current next frame */
192  vlib_validate_buffer_enqueue_x1 (vm, node, next, to_next,
193  n_left_to_next, bi0, next0);
194  }
195 
196  vlib_put_next_frame (vm, node, next, n_left_to_next);
197  }
198 
199  return frame->n_vectors;
200 }
201 
202 /* *INDENT-OFF* */
204  .function = ip4_icmp_input,
205  .name = "ip4-icmp-input",
206 
207  .vector_size = sizeof (u32),
208 
209  .format_trace = format_icmp_input_trace,
210 
211  .n_errors = ARRAY_LEN (icmp_error_strings),
212  .error_strings = icmp_error_strings,
213 
214  .n_next_nodes = 1,
215  .next_nodes = {
216  [ICMP_INPUT_NEXT_ERROR] = "ip4-punt",
217  },
218 };
219 /* *INDENT-ON* */
220 
221 typedef enum
222 {
227 
228 static u8
230 {
231  switch (type)
232  {
233  case ICMP4_destination_unreachable:
234  return ICMP4_ERROR_DEST_UNREACH_SENT;
235  case ICMP4_time_exceeded:
236  return ICMP4_ERROR_TTL_EXPIRE_SENT;
237  case ICMP4_parameter_problem:
238  return ICMP4_ERROR_PARAM_PROBLEM_SENT;
239  default:
240  return ICMP4_ERROR_DROP;
241  }
242 }
243 
244 static uword
247 {
248  u32 *from, *to_next;
249  uword n_left_from, n_left_to_next;
250  ip4_icmp_error_next_t next_index;
251  ip4_main_t *im = &ip4_main;
252  ip_lookup_main_t *lm = &im->lookup_main;
253 
254  from = vlib_frame_vector_args (frame);
255  n_left_from = frame->n_vectors;
256  next_index = node->cached_next_index;
257 
258  if (node->flags & VLIB_NODE_FLAG_TRACE)
259  vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
260  /* stride */ 1,
261  sizeof (icmp_input_trace_t));
262 
263  while (n_left_from > 0)
264  {
265  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
266 
267  while (n_left_from > 0 && n_left_to_next > 0)
268  {
269  /*
270  * Duplicate first buffer and free the original chain. Keep
271  * as much of the original packet as possible, within the
272  * minimum MTU. We chat "a little" here by keeping whatever
273  * is available in the first buffer.
274  */
275 
276  u32 pi0 = ~0;
277  u32 org_pi0 = from[0];
279  u8 error0 = ICMP4_ERROR_NONE;
280  vlib_buffer_t *p0, *org_p0;
281  ip4_header_t *ip0, *out_ip0;
282  icmp46_header_t *icmp0;
283  u32 sw_if_index0, if_add_index0;
284  ip_csum_t sum;
285 
286  org_p0 = vlib_get_buffer (vm, org_pi0);
287  p0 = vlib_buffer_copy_no_chain (vm, org_p0, &pi0);
288  if (!p0 || pi0 == ~0) /* Out of buffers */
289  continue;
290 
291  /* Speculatively enqueue p0 to the current next frame */
292  to_next[0] = pi0;
293  from += 1;
294  to_next += 1;
295  n_left_from -= 1;
296  n_left_to_next -= 1;
297 
298  ip0 = vlib_buffer_get_current (p0);
299  sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
300 
301  /* Add IP header and ICMPv4 header including a 4 byte data field */
303  -sizeof (ip4_header_t) -
304  sizeof (icmp46_header_t) - 4);
305 
306  p0->current_length =
307  p0->current_length > 576 ? 576 : p0->current_length;
308  out_ip0 = vlib_buffer_get_current (p0);
309  icmp0 = (icmp46_header_t *) & out_ip0[1];
310 
311  /* Fill ip header fields */
312  out_ip0->ip_version_and_header_length = 0x45;
313  out_ip0->tos = 0;
314  out_ip0->length = clib_host_to_net_u16 (p0->current_length);
315  out_ip0->fragment_id = 0;
316  out_ip0->flags_and_fragment_offset = 0;
317  out_ip0->ttl = 0xff;
318  out_ip0->protocol = IP_PROTOCOL_ICMP;
319  out_ip0->dst_address = ip0->src_address;
320  if_add_index0 = ~0;
322  > sw_if_index0))
323  if_add_index0 =
324  lm->if_address_pool_index_by_sw_if_index[sw_if_index0];
325  if (PREDICT_TRUE (if_add_index0 != ~0))
326  {
327  ip_interface_address_t *if_add =
328  pool_elt_at_index (lm->if_address_pool, if_add_index0);
329  ip4_address_t *if_ip =
331  out_ip0->src_address = *if_ip;
332  }
333  else
334  {
335  /* interface has no IP4 address - should not happen */
336  next0 = IP4_ICMP_ERROR_NEXT_DROP;
337  error0 = ICMP4_ERROR_DROP;
338  }
339  out_ip0->checksum = ip4_header_checksum (out_ip0);
340 
341  /* Fill icmp header fields */
342  icmp0->type = vnet_buffer (p0)->ip.icmp.type;
343  icmp0->code = vnet_buffer (p0)->ip.icmp.code;
344  *((u32 *) (icmp0 + 1)) =
345  clib_host_to_net_u32 (vnet_buffer (p0)->ip.icmp.data);
346  icmp0->checksum = 0;
347  sum =
348  ip_incremental_checksum (0, icmp0,
349  p0->current_length -
350  sizeof (ip4_header_t));
351  icmp0->checksum = ~ip_csum_fold (sum);
352 
353  /* Update error status */
354  if (error0 == ICMP4_ERROR_NONE)
355  error0 = icmp4_icmp_type_to_error (icmp0->type);
356 
357  vlib_error_count (vm, node->node_index, error0, 1);
358 
359  /* Verify speculative enqueue, maybe switch current next frame */
360  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
361  to_next, n_left_to_next,
362  pi0, next0);
363  }
364  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
365  }
366 
367  /*
368  * push the original buffers to error-drop, so that
369  * they can get the error counters handled, then freed
370  */
372  vlib_frame_vector_args (frame),
374  frame->n_vectors);
375 
376  return frame->n_vectors;
377 }
378 
379 /* *INDENT-OFF* */
381  .function = ip4_icmp_error,
382  .name = "ip4-icmp-error",
383  .vector_size = sizeof (u32),
384 
385  .n_errors = ARRAY_LEN (icmp_error_strings),
386  .error_strings = icmp_error_strings,
387 
388  .n_next_nodes = IP4_ICMP_ERROR_N_NEXT,
389  .next_nodes = {
390  [IP4_ICMP_ERROR_NEXT_DROP] = "ip4-drop",
391  [IP4_ICMP_ERROR_NEXT_LOOKUP] = "ip4-lookup",
392  },
393 
394  .format_trace = format_icmp_input_trace,
395 };
396 /* *INDENT-ON* */
397 
398 
399 static uword
401 {
402  icmp46_header_t *h = va_arg (*args, icmp46_header_t *);
404  u32 i;
405 
407  cm->type_and_code_by_name, &i))
408  {
409  h->type = (i >> 8) & 0xff;
410  h->code = (i >> 0) & 0xff;
411  }
413  cm->type_by_name, &i))
414  {
415  h->type = i;
416  h->code = 0;
417  }
418  else
419  return 0;
420 
421  return 1;
422 }
423 
424 static void
426  pg_stream_t * s,
427  pg_edit_group_t * g, u32 * packets, u32 n_packets)
428 {
430  u32 ip_offset, icmp_offset;
431 
432  icmp_offset = g->start_byte_offset;
433  ip_offset = (g - 1)->start_byte_offset;
434 
435  while (n_packets >= 1)
436  {
437  vlib_buffer_t *p0;
438  ip4_header_t *ip0;
439  icmp46_header_t *icmp0;
440  u32 len0;
441 
442  p0 = vlib_get_buffer (vm, packets[0]);
443  n_packets -= 1;
444  packets += 1;
445 
446  ASSERT (p0->current_data == 0);
447  ip0 = (void *) (p0->data + ip_offset);
448  icmp0 = (void *) (p0->data + icmp_offset);
449 
450  /* if IP length has been specified, then calculate the length based on buffer */
451  if (ip0->length == 0)
452  len0 = vlib_buffer_length_in_chain (vm, p0) - icmp_offset;
453  else
454  len0 = clib_net_to_host_u16 (ip0->length) - icmp_offset;
455 
456  icmp0->checksum =
457  ~ip_csum_fold (ip_incremental_checksum (0, icmp0, len0));
458  }
459 }
460 
461 typedef struct
462 {
466 
467 always_inline void
469 {
470  /* Initialize fields that are not bit fields in the IP header. */
471 #define _(f) pg_edit_init (&p->f, icmp46_header_t, f);
472  _(type);
473  _(code);
474  _(checksum);
475 #undef _
476 }
477 
478 static uword
479 unformat_pg_icmp_header (unformat_input_t * input, va_list * args)
480 {
481  pg_stream_t *s = va_arg (*args, pg_stream_t *);
483  u32 group_index;
484 
485  p = pg_create_edit_group (s, sizeof (p[0]), sizeof (icmp46_header_t),
486  &group_index);
488 
490 
491  {
492  icmp46_header_t tmp;
493 
494  if (!unformat (input, "ICMP %U", unformat_icmp_type_and_code, &tmp))
495  goto error;
496 
497  pg_edit_set_fixed (&p->type, tmp.type);
498  pg_edit_set_fixed (&p->code, tmp.code);
499  }
500 
501  /* Parse options. */
502  while (1)
503  {
504  if (unformat (input, "checksum %U",
506  ;
507 
508  /* Can't parse input: try next protocol level. */
509  else
510  break;
511  }
512 
513  if (!unformat_user (input, unformat_pg_payload, s))
514  goto error;
515 
517  {
518  pg_edit_group_t *g = pg_stream_get_group (s, group_index);
520  g->edit_function_opaque = 0;
521  }
522 
523  return 1;
524 
525 error:
526  /* Free up any edits we may have added. */
527  pg_free_edit_group (s);
528  return 0;
529 }
530 
531 void
533 {
534  icmp4_main_t *im = &icmp4_main;
535  u32 old_next_index;
536 
537  ASSERT ((int) type < ARRAY_LEN (im->ip4_input_next_index_by_type));
538  old_next_index = im->ip4_input_next_index_by_type[type];
539 
541  = vlib_node_add_next (vm, ip4_icmp_input_node.index, node_index);
542 
543  if (old_next_index &&
544  (old_next_index != im->ip4_input_next_index_by_type[type]))
545  clib_warning ("WARNING: changed next_by_type[%d]", (int) type);
546 }
547 
548 static clib_error_t *
550 {
551  ip_main_t *im = &ip_main;
552  ip_protocol_info_t *pi;
554  clib_error_t *error;
555 
557 
558  if (error)
559  return error;
560 
561  pi = ip_get_protocol_info (im, IP_PROTOCOL_ICMP);
564 
565  cm->type_by_name = hash_create_string (0, sizeof (uword));
566 #define _(n,t) hash_set_mem (cm->type_by_name, #t, (n));
568 #undef _
569 
570  cm->type_and_code_by_name = hash_create_string (0, sizeof (uword));
571 #define _(a,n,t) hash_set_mem (cm->type_by_name, #t, (n) | (ICMP4_##a << 8));
573 #undef _
574 
577  sizeof (cm->ip4_input_next_index_by_type));
578 
579  return 0;
580 }
581 
583 
584 /*
585  * fd.io coding-style-patch-verification: ON
586  *
587  * Local Variables:
588  * eval: (c-set-style "gnu")
589  * End:
590  */
Definition: edit.h:64
ip4_icmp_error_next_t
Definition: icmp4.c:221
static uword ip4_icmp_error(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: icmp4.c:245
#define CLIB_UNUSED(x)
Definition: clib.h:82
ip4_address_t src_address
Definition: ip4_packet.h:170
ip_interface_address_t * if_address_pool
Pool of addresses that are assigned to interfaces.
Definition: lookup.h:143
static u8 * format_icmp_input_trace(u8 *s, va_list *va)
Definition: icmp4.c:108
Definition: pg.h:318
static void pg_edit_set_fixed(pg_edit_t *e, u64 value)
Definition: edit.h:153
format_function_t format_ip4_header
Definition: format.h:81
#define PREDICT_TRUE(x)
Definition: clib.h:112
i16 current_data
signed offset in data[], pre_data[] that we are currently processing.
Definition: buffer.h:110
static void vlib_error_count(vlib_main_t *vm, uword node_index, uword counter, uword increment)
Definition: error_funcs.h:57
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
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:73
static char * icmp_error_strings[]
Definition: icmp4.c:44
u16 current_length
Nbytes between current data and the end of this buffer.
Definition: buffer.h:113
u8 data[0]
Packet data.
Definition: buffer.h:181
int i
uword unformat_user(unformat_input_t *input, unformat_function_t *func,...)
Definition: unformat.c:989
uword unformat_pg_edit(unformat_input_t *input, va_list *args)
Definition: edit.c:106
ip_lookup_main_t lookup_main
Definition: ip4.h:107
uword ip_csum_t
Definition: ip_packet.h:244
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
u16 flags_and_fragment_offset
Definition: ip4_packet.h:151
Definition: ip.h:106
vlib_error_t * errors
Vector of errors for this node.
Definition: node.h:470
static uword vlib_buffer_length_in_chain(vlib_main_t *vm, vlib_buffer_t *b)
Get length in bytes of the buffer chain.
Definition: buffer_funcs.h:366
pg_edit_t code
Definition: icmp4.c:463
static uword vlib_node_add_next(vlib_main_t *vm, uword node, uword next_node)
Definition: node_funcs.h:1092
unsigned char u8
Definition: types.h:56
u32 start_byte_offset
Definition: pg.h:67
static pg_edit_group_t * pg_stream_get_group(pg_stream_t *s, u32 group_index)
Definition: pg.h:225
unformat_function_t * unformat_pg_edit
Definition: ip.h:87
#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:440
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:173
static uword unformat_icmp_type_and_code(unformat_input_t *input, va_list *args)
Definition: icmp4.c:400
ip4_address_t dst_address
Definition: ip4_packet.h:170
uword unformat_pg_payload(unformat_input_t *input, va_list *args)
Definition: edit.c:127
pg_edit_type_t type
Definition: edit.h:66
static_always_inline void vlib_buffer_enqueue_to_single_next(vlib_main_t *vm, vlib_node_runtime_t *node, u32 *buffers, u16 next_index, u32 count)
Definition: buffer_node.h:452
static void * ip4_next_header(ip4_header_t *i)
Definition: ip4_packet.h:241
unsigned int u32
Definition: types.h:88
static void * pg_create_edit_group(pg_stream_t *s, int n_edit_bytes, int n_packet_bytes, u32 *group_index)
Definition: pg.h:231
#define vlib_call_init_function(vm, x)
Definition: init.h:270
#define hash_create_string(elts, value_bytes)
Definition: hash.h:690
vl_api_fib_path_type_t type
Definition: fib_types.api:123
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:136
void ip4_icmp_register_type(vlib_main_t *vm, icmp4_type_t type, u32 node_index)
Definition: icmp4.c:532
static clib_error_t * icmp4_init(vlib_main_t *vm)
Definition: icmp4.c:549
vnet_crypto_main_t * cm
Definition: quic_crypto.c:41
static vlib_buffer_t * vlib_buffer_copy_no_chain(vlib_main_t *vm, vlib_buffer_t *b, u32 *di)
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:519
static ip_protocol_info_t * ip_get_protocol_info(ip_main_t *im, u32 protocol)
Definition: ip.h:133
pg_edit_t type
Definition: icmp4.c:463
format_function_t * format_header
Definition: ip.h:78
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
static uword unformat_pg_icmp_header(unformat_input_t *input, va_list *args)
Definition: icmp4.c:479
#define always_inline
Definition: ipsec.h:28
static u8 * format_ip4_icmp_type_and_code(u8 *s, va_list *args)
Definition: icmp4.c:51
u32 node_index
Node index.
Definition: node.h:496
icmp4_main_t icmp4_main
Definition: icmp4.c:136
#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
vlib_main_t * vm
Definition: in2out_ed.c:1810
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:425
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
clib_error_t * ip_main_init(vlib_main_t *vm)
Definition: ip_init.c:45
u16 n_vectors
Definition: node.h:397
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:80
ip_main_t ip_main
Definition: ip_init.c:42
static u8 * format_ip4_icmp_header(u8 *s, va_list *args)
Definition: icmp4.c:91
#define clib_warning(format, args...)
Definition: error.h:59
uword * type_by_name
Definition: icmp4.c:130
uword * type_and_code_by_name
Definition: icmp4.c:128
icmp4_type_t
icmp_input_next_t
Definition: icmp4.c:120
#define ARRAY_LEN(x)
Definition: clib.h:62
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
vlib_main_t vlib_node_runtime_t * node
Definition: in2out_ed.c:1810
pg_edit_t checksum
Definition: icmp4.c:464
u32 * if_address_pool_index_by_sw_if_index
Head of doubly linked list of interface addresses for each software interface.
Definition: lookup.h:150
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:515
#define ASSERT(truth)
ip_dscp_t tos
Definition: ip4_packet.h:141
IPv4 main type.
Definition: ip4.h:105
uword unformat_vlib_number_by_name(unformat_input_t *input, va_list *args)
Definition: format.c:157
static void pg_free_edit_group(pg_stream_t *s)
Definition: pg.h:284
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:248
uword edit_function_opaque
Definition: pg.h:79
Definition: pg.h:94
static vlib_main_t * vlib_get_main(void)
Definition: global_funcs.h:23
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
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
VLIB buffer representation.
Definition: buffer.h:102
u64 uword
Definition: types.h:112
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:244
vlib_node_registration_t ip4_icmp_error_node
(constructor) VLIB_REGISTER_NODE (ip4_icmp_error_node)
Definition: icmp4.c:380
uword unformat_pg_number(unformat_input_t *input, va_list *args)
Definition: edit.c:85
vlib_node_registration_t ip4_icmp_input_node
(constructor) VLIB_REGISTER_NODE (ip4_icmp_input_node)
Definition: icmp4.c:203
#define vnet_buffer(b)
Definition: buffer.h:408
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1079
u8 ip4_input_next_index_by_type[256]
Definition: icmp4.c:133
vlib_main_t vlib_node_runtime_t vlib_frame_t * frame
Definition: in2out_ed.c:1811
u16 flags
Copy of main node flags.
Definition: node.h:509
u8 packet_data[64]
Definition: icmp4.h:43
u8 ip_version_and_header_length
Definition: ip4_packet.h:138
static void * ip_interface_address_get_address(ip_lookup_main_t *lm, ip_interface_address_t *a)
Definition: lookup.h:199
static uword ip4_icmp_input(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: icmp4.c:139
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:302
static u8 icmp4_icmp_type_to_error(u8 type)
Definition: icmp4.c:229
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
static void pg_icmp_header_init(pg_icmp46_header_t *p)
Definition: icmp4.c:468
static ip_csum_t ip_incremental_checksum(ip_csum_t sum, void *_data, uword n_bytes)
Definition: ip_packet.h:318
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
static u16 ip4_header_checksum(ip4_header_t *i)
Definition: ip4_packet.h:247
static u16 ip_csum_fold(ip_csum_t c)
Definition: ip_packet.h:300
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:978
Definition: defs.h:46