FD.io VPP  v20.05.1-6-gf53edbc3b
Vector Packet Processing
node.c
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1 /*
2  * node.c - ipfix probe graph node
3  *
4  * Copyright (c) 2017 Cisco and/or its affiliates.
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at:
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 #include <vlib/vlib.h>
18 #include <vnet/vnet.h>
19 #include <vnet/pg/pg.h>
20 #include <vppinfra/crc32.h>
21 #include <vppinfra/error.h>
22 #include <flowprobe/flowprobe.h>
23 #include <vnet/ip/ip6_packet.h>
24 #include <vlibmemory/api.h>
25 
27 
28 /**
29  * @file node.c
30  * flow record generator graph node
31  */
32 
33 typedef struct
34 {
35  /** interface handle */
38  /** packet timestamp */
40  /** size of the buffer */
42 
43  /** L2 information */
44  u8 src_mac[6];
45  u8 dst_mac[6];
46  /** Ethertype */
48 
49  /** L3 information */
50  ip46_address_t src_address;
51  ip46_address_t dst_address;
54 
55  /** L4 information */
58 
61 
62 static char *flowprobe_variant_strings[] = {
63  [FLOW_VARIANT_IP4] = "IP4",
64  [FLOW_VARIANT_IP6] = "IP6",
65  [FLOW_VARIANT_L2] = "L2",
66  [FLOW_VARIANT_L2_IP4] = "L2-IP4",
67  [FLOW_VARIANT_L2_IP6] = "L2-IP6",
68 };
69 
70 /* packet trace format function */
71 static u8 *
72 format_flowprobe_trace (u8 * s, va_list * args)
73 {
74  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
75  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
76  flowprobe_trace_t *t = va_arg (*args, flowprobe_trace_t *);
77  u32 indent = format_get_indent (s);
78 
79  s = format (s,
80  "FLOWPROBE[%s]: rx_sw_if_index %d, tx_sw_if_index %d, "
81  "timestamp %lld, size %d", flowprobe_variant_strings[t->which],
83  t->timestamp, t->buffer_size);
84 
85  if (t->which == FLOW_VARIANT_L2)
86  s = format (s, "\n%U -> %U", format_white_space, indent,
89 
90  if (t->protocol > 0
93  s =
94  format (s, "\n%U%U: %U -> %U", format_white_space, indent,
98  return s;
99 }
100 
104 
105 /* No counters at the moment */
106 #define foreach_flowprobe_error \
107 _(COLLISION, "Hash table collisions") \
108 _(BUFFER, "Buffer allocation error") \
109 _(EXPORTED_PACKETS, "Exported packets") \
110 _(INPATH, "Exported packets in path")
111 
112 typedef enum
113 {
114 #define _(sym,str) FLOWPROBE_ERROR_##sym,
116 #undef _
119 
120 static char *flowprobe_error_strings[] = {
121 #define _(sym,string) string,
123 #undef _
124 };
125 
126 typedef enum
127 {
132 
133 #define FLOWPROBE_NEXT_NODES { \
134  [FLOWPROBE_NEXT_DROP] = "error-drop", \
135  [FLOWPROBE_NEXT_IP4_LOOKUP] = "ip4-lookup", \
136 }
137 
138 static inline flowprobe_variant_t
140  flowprobe_record_t flags, u16 ethertype)
141 {
142  if (which == FLOW_VARIANT_L2
143  && (flags & FLOW_RECORD_L3 || flags & FLOW_RECORD_L4))
144  return ethertype == ETHERNET_TYPE_IP6 ? FLOW_VARIANT_L2_IP6 : ethertype ==
145  ETHERNET_TYPE_IP4 ? FLOW_VARIANT_L2_IP4 : FLOW_VARIANT_L2;
146  return which;
147 }
148 
149 /*
150  * NTP rfc868 : 2 208 988 800 corresponds to 00:00 1 Jan 1970 GMT
151  */
152 #define NTP_TIMESTAMP 2208988800LU
153 
154 static inline u32
156 {
157  u16 start = offset;
158 
159  /* Ingress interface */
160  u32 rx_if = clib_host_to_net_u32 (e->key.rx_sw_if_index);
161  clib_memcpy_fast (to_b->data + offset, &rx_if, sizeof (rx_if));
162  offset += sizeof (rx_if);
163 
164  /* Egress interface */
165  u32 tx_if = clib_host_to_net_u32 (e->key.tx_sw_if_index);
166  clib_memcpy_fast (to_b->data + offset, &tx_if, sizeof (tx_if));
167  offset += sizeof (tx_if);
168 
169  /* packet delta count */
170  u64 packetdelta = clib_host_to_net_u64 (e->packetcount);
171  clib_memcpy_fast (to_b->data + offset, &packetdelta, sizeof (u64));
172  offset += sizeof (u64);
173 
174  /* flowStartNanoseconds */
175  u32 t = clib_host_to_net_u32 (e->flow_start.sec + NTP_TIMESTAMP);
176  clib_memcpy_fast (to_b->data + offset, &t, sizeof (u32));
177  offset += sizeof (u32);
178  t = clib_host_to_net_u32 (e->flow_start.nsec);
179  clib_memcpy_fast (to_b->data + offset, &t, sizeof (u32));
180  offset += sizeof (u32);
181 
182  /* flowEndNanoseconds */
183  t = clib_host_to_net_u32 (e->flow_end.sec + NTP_TIMESTAMP);
184  clib_memcpy_fast (to_b->data + offset, &t, sizeof (u32));
185  offset += sizeof (u32);
186  t = clib_host_to_net_u32 (e->flow_end.nsec);
187  clib_memcpy_fast (to_b->data + offset, &t, sizeof (u32));
188  offset += sizeof (u32);
189 
190  return offset - start;
191 }
192 
193 static inline u32
195 {
196  u16 start = offset;
197 
198  /* src mac address */
199  clib_memcpy_fast (to_b->data + offset, &e->key.src_mac, 6);
200  offset += 6;
201 
202  /* dst mac address */
203  clib_memcpy_fast (to_b->data + offset, &e->key.dst_mac, 6);
204  offset += 6;
205 
206  /* ethertype */
207  clib_memcpy_fast (to_b->data + offset, &e->key.ethertype, 2);
208  offset += 2;
209 
210  return offset - start;
211 }
212 
213 static inline u32
215 {
216  u16 start = offset;
217 
218  /* ip6 src address */
219  clib_memcpy_fast (to_b->data + offset, &e->key.src_address,
220  sizeof (ip6_address_t));
221  offset += sizeof (ip6_address_t);
222 
223  /* ip6 dst address */
224  clib_memcpy_fast (to_b->data + offset, &e->key.dst_address,
225  sizeof (ip6_address_t));
226  offset += sizeof (ip6_address_t);
227 
228  /* Protocol */
229  to_b->data[offset++] = e->key.protocol;
230 
231  /* octetDeltaCount */
232  u64 octetdelta = clib_host_to_net_u64 (e->octetcount);
233  clib_memcpy_fast (to_b->data + offset, &octetdelta, sizeof (u64));
234  offset += sizeof (u64);
235 
236  return offset - start;
237 }
238 
239 static inline u32
241 {
242  u16 start = offset;
243 
244  /* ip4 src address */
245  clib_memcpy_fast (to_b->data + offset, &e->key.src_address.ip4,
246  sizeof (ip4_address_t));
247  offset += sizeof (ip4_address_t);
248 
249  /* ip4 dst address */
250  clib_memcpy_fast (to_b->data + offset, &e->key.dst_address.ip4,
251  sizeof (ip4_address_t));
252  offset += sizeof (ip4_address_t);
253 
254  /* Protocol */
255  to_b->data[offset++] = e->key.protocol;
256 
257  /* octetDeltaCount */
258  u64 octetdelta = clib_host_to_net_u64 (e->octetcount);
259  clib_memcpy_fast (to_b->data + offset, &octetdelta, sizeof (u64));
260  offset += sizeof (u64);
261 
262  return offset - start;
263 }
264 
265 static inline u32
267 {
268  u16 start = offset;
269 
270  /* src port */
271  clib_memcpy_fast (to_b->data + offset, &e->key.src_port, 2);
272  offset += 2;
273 
274  /* dst port */
275  clib_memcpy_fast (to_b->data + offset, &e->key.dst_port, 2);
276  offset += 2;
277 
278  /* tcp control bits */
279  u16 control_bits = htons (e->prot.tcp.flags);
280  clib_memcpy_fast (to_b->data + offset, &control_bits, 2);
281  offset += 2;
282 
283  return offset - start;
284 }
285 
286 static inline u32
288 {
290  u32 h = 0;
291 
292 #ifdef clib_crc32c_uses_intrinsics
293  h = clib_crc32c ((u8 *) k, sizeof (*k));
294 #else
295  int i;
296  u64 tmp = 0;
297  for (i = 0; i < sizeof (*k) / 8; i++)
298  tmp ^= ((u64 *) k)[i];
299 
300  h = clib_xxhash (tmp);
301 #endif
302 
303  return h >> (32 - fm->ht_log2len);
304 }
305 
307 flowprobe_lookup (u32 my_cpu_number, flowprobe_key_t * k, u32 * poolindex,
308  bool * collision)
309 {
312  u32 h;
313 
314  h = (fm->active_timer) ? flowprobe_hash (k) : 0;
315 
316  /* Lookup in the flow state pool */
317  *poolindex = fm->hash_per_worker[my_cpu_number][h];
318  if (*poolindex != ~0)
319  {
320  e = pool_elt_at_index (fm->pool_per_worker[my_cpu_number], *poolindex);
321  if (e)
322  {
323  /* Verify key or report collision */
324  if (memcmp (k, &e->key, sizeof (flowprobe_key_t)))
325  *collision = true;
326  return e;
327  }
328  }
329 
330  return 0;
331 }
332 
334 flowprobe_create (u32 my_cpu_number, flowprobe_key_t * k, u32 * poolindex)
335 {
337  u32 h;
338 
340 
341  /* Get my index */
342  h = (fm->active_timer) ? flowprobe_hash (k) : 0;
343 
344  pool_get (fm->pool_per_worker[my_cpu_number], e);
345  *poolindex = e - fm->pool_per_worker[my_cpu_number];
346  fm->hash_per_worker[my_cpu_number][h] = *poolindex;
347 
348  e->key = *k;
349 
350  if (fm->passive_timer > 0)
351  {
352  e->passive_timer_handle = tw_timer_start_2t_1w_2048sl
353  (fm->timers_per_worker[my_cpu_number], *poolindex, 0,
354  fm->passive_timer);
355  }
356  return e;
357 }
358 
359 static inline void
364 {
365  if (fm->disabled)
366  return;
367 
368  u32 my_cpu_number = vm->thread_index;
369  u16 octets = 0;
370 
371  flowprobe_record_t flags = fm->context[which].flags;
372  bool collect_ip4 = false, collect_ip6 = false;
373  ASSERT (b);
375  u16 ethertype = clib_net_to_host_u16 (eth->type);
376  /* *INDENT-OFF* */
377  flowprobe_key_t k = {};
378  /* *INDENT-ON* */
379  ip4_header_t *ip4 = 0;
380  ip6_header_t *ip6 = 0;
381  udp_header_t *udp = 0;
382  tcp_header_t *tcp = 0;
383  u8 tcp_flags = 0;
384 
385  if (flags & FLOW_RECORD_L3 || flags & FLOW_RECORD_L4)
386  {
387  collect_ip4 = which == FLOW_VARIANT_L2_IP4 || which == FLOW_VARIANT_IP4;
388  collect_ip6 = which == FLOW_VARIANT_L2_IP6 || which == FLOW_VARIANT_IP6;
389  }
390 
391  k.rx_sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
392  k.tx_sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_TX];
393 
394  k.which = which;
395 
396  if (flags & FLOW_RECORD_L2)
397  {
398  clib_memcpy_fast (k.src_mac, eth->src_address, 6);
399  clib_memcpy_fast (k.dst_mac, eth->dst_address, 6);
400  k.ethertype = ethertype;
401  }
402  if (collect_ip6 && ethertype == ETHERNET_TYPE_IP6)
403  {
404  ip6 = (ip6_header_t *) (eth + 1);
405  if (flags & FLOW_RECORD_L3)
406  {
407  k.src_address.as_u64[0] = ip6->src_address.as_u64[0];
408  k.src_address.as_u64[1] = ip6->src_address.as_u64[1];
409  k.dst_address.as_u64[0] = ip6->dst_address.as_u64[0];
410  k.dst_address.as_u64[1] = ip6->dst_address.as_u64[1];
411  }
412  k.protocol = ip6->protocol;
413  if (k.protocol == IP_PROTOCOL_UDP)
414  udp = (udp_header_t *) (ip6 + 1);
415  else if (k.protocol == IP_PROTOCOL_TCP)
416  tcp = (tcp_header_t *) (ip6 + 1);
417 
418  octets = clib_net_to_host_u16 (ip6->payload_length)
419  + sizeof (ip6_header_t);
420  }
421  if (collect_ip4 && ethertype == ETHERNET_TYPE_IP4)
422  {
423  ip4 = (ip4_header_t *) (eth + 1);
424  if (flags & FLOW_RECORD_L3)
425  {
426  k.src_address.ip4.as_u32 = ip4->src_address.as_u32;
427  k.dst_address.ip4.as_u32 = ip4->dst_address.as_u32;
428  }
429  k.protocol = ip4->protocol;
430  if ((flags & FLOW_RECORD_L4) && k.protocol == IP_PROTOCOL_UDP)
431  udp = (udp_header_t *) (ip4 + 1);
432  else if ((flags & FLOW_RECORD_L4) && k.protocol == IP_PROTOCOL_TCP)
433  tcp = (tcp_header_t *) (ip4 + 1);
434 
435  octets = clib_net_to_host_u16 (ip4->length);
436  }
437 
438  if (udp)
439  {
440  k.src_port = udp->src_port;
441  k.dst_port = udp->dst_port;
442  }
443  else if (tcp)
444  {
445  k.src_port = tcp->src_port;
446  k.dst_port = tcp->dst_port;
447  tcp_flags = tcp->flags;
448  }
449 
450  if (t)
451  {
454  clib_memcpy_fast (t->src_mac, k.src_mac, 6);
455  clib_memcpy_fast (t->dst_mac, k.dst_mac, 6);
456  t->ethertype = k.ethertype;
457  t->src_address.ip4.as_u32 = k.src_address.ip4.as_u32;
458  t->dst_address.ip4.as_u32 = k.dst_address.ip4.as_u32;
459  t->protocol = k.protocol;
460  t->src_port = k.src_port;
461  t->dst_port = k.dst_port;
462  t->which = k.which;
463  }
464 
465  flowprobe_entry_t *e = 0;
466  f64 now = vlib_time_now (vm);
467  if (fm->active_timer > 0)
468  {
469  u32 poolindex = ~0;
470  bool collision = false;
471 
472  e = flowprobe_lookup (my_cpu_number, &k, &poolindex, &collision);
473  if (collision)
474  {
475  /* Flush data and clean up entry for reuse. */
476  if (e->packetcount)
477  flowprobe_export_entry (vm, e);
478  e->key = k;
479  e->flow_start = timestamp;
481  FLOWPROBE_ERROR_COLLISION, 1);
482  }
483  if (!e) /* Create new entry */
484  {
485  e = flowprobe_create (my_cpu_number, &k, &poolindex);
486  e->last_exported = now;
487  e->flow_start = timestamp;
488  }
489  }
490  else
491  {
492  e = &fm->stateless_entry[my_cpu_number];
493  e->key = k;
494  }
495 
496  if (e)
497  {
498  /* Updating entry */
499  e->packetcount++;
500  e->octetcount += octets;
501  e->last_updated = now;
502  e->flow_end = timestamp;
503  e->prot.tcp.flags |= tcp_flags;
504  if (fm->active_timer == 0
505  || (now > e->last_exported + fm->active_timer))
506  flowprobe_export_entry (vm, e);
507  }
508 }
509 
510 static u16
512 {
513  return sizeof (ip4_header_t) + sizeof (udp_header_t) +
514  sizeof (ipfix_message_header_t) + sizeof (ipfix_set_header_t);
515 }
516 
517 static void
519  flowprobe_variant_t which)
520 {
523  vlib_frame_t *f;
527  ip4_header_t *ip;
528  udp_header_t *udp;
529  flowprobe_record_t flags = fm->context[which].flags;
530  u32 my_cpu_number = vm->thread_index;
531 
532  /* Fill in header */
533  flow_report_stream_t *stream;
534 
535  /* Nothing to send */
536  if (fm->context[which].next_record_offset_per_worker[my_cpu_number] <=
538  return;
539 
540  u32 i, index = vec_len (frm->streams);
541  for (i = 0; i < index; i++)
542  if (frm->streams[i].domain_id == 1)
543  {
544  index = i;
545  break;
546  }
547  if (i == vec_len (frm->streams))
548  {
549  vec_validate (frm->streams, index);
550  frm->streams[index].domain_id = 1;
551  }
552  stream = &frm->streams[index];
553 
554  tp = vlib_buffer_get_current (b0);
555  ip = (ip4_header_t *) & tp->ip4;
556  udp = (udp_header_t *) (ip + 1);
557  h = (ipfix_message_header_t *) (udp + 1);
558  s = (ipfix_set_header_t *) (h + 1);
559 
560  ip->ip_version_and_header_length = 0x45;
561  ip->ttl = 254;
562  ip->protocol = IP_PROTOCOL_UDP;
566  udp->src_port = clib_host_to_net_u16 (UDP_DST_PORT_ipfix);
567  udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipfix);
568  udp->checksum = 0;
569 
570  /* FIXUP: message header export_time */
571  h->export_time = (u32)
572  (((f64) frm->unix_time_0) +
573  (vlib_time_now (frm->vlib_main) - frm->vlib_time_0));
574  h->export_time = clib_host_to_net_u32 (h->export_time);
575  h->domain_id = clib_host_to_net_u32 (stream->domain_id);
576 
577  /* FIXUP: message header sequence_number */
578  h->sequence_number = stream->sequence_number++;
579  h->sequence_number = clib_host_to_net_u32 (h->sequence_number);
580 
582  b0->current_length -
583  (sizeof (*ip) + sizeof (*udp) +
584  sizeof (*h)));
586  (sizeof (*ip) + sizeof (*udp)));
587 
588  ip->length = clib_host_to_net_u16 (b0->current_length);
589 
590  ip->checksum = ip4_header_checksum (ip);
591  udp->length = clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
592 
593  if (frm->udp_checksum)
594  {
595  /* RFC 7011 section 10.3.2. */
596  udp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip);
597  if (udp->checksum == 0)
598  udp->checksum = 0xffff;
599  }
600 
601  ASSERT (ip->checksum == ip4_header_checksum (ip));
602 
603  /* Find or allocate a frame */
604  f = fm->context[which].frames_per_worker[my_cpu_number];
605  if (PREDICT_FALSE (f == 0))
606  {
607  u32 *to_next;
608  f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
609  fm->context[which].frames_per_worker[my_cpu_number] = f;
610  u32 bi0 = vlib_get_buffer_index (vm, b0);
611 
612  /* Enqueue the buffer */
613  to_next = vlib_frame_vector_args (f);
614  to_next[0] = bi0;
615  f->n_vectors = 1;
616  }
617 
620  FLOWPROBE_ERROR_EXPORTED_PACKETS, 1);
621 
622  fm->context[which].frames_per_worker[my_cpu_number] = 0;
623  fm->context[which].buffers_per_worker[my_cpu_number] = 0;
624  fm->context[which].next_record_offset_per_worker[my_cpu_number] =
626 }
627 
628 static vlib_buffer_t *
630 {
633  vlib_buffer_t *b0;
634  u32 bi0;
635  u32 my_cpu_number = vm->thread_index;
636 
637  /* Find or allocate a buffer */
638  b0 = fm->context[which].buffers_per_worker[my_cpu_number];
639 
640  /* Need to allocate a buffer? */
641  if (PREDICT_FALSE (b0 == 0))
642  {
643  if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
644  {
646  FLOWPROBE_ERROR_BUFFER, 1);
647  return 0;
648  }
649 
650  /* Initialize the buffer */
651  b0 = fm->context[which].buffers_per_worker[my_cpu_number] =
652  vlib_get_buffer (vm, bi0);
654 
655  b0->current_data = 0;
657  b0->flags |=
658  (VLIB_BUFFER_TOTAL_LENGTH_VALID | VNET_BUFFER_F_FLOW_REPORT);
659  vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
660  vnet_buffer (b0)->sw_if_index[VLIB_TX] = frm->fib_index;
661  fm->context[which].next_record_offset_per_worker[my_cpu_number] =
662  b0->current_length;
663  }
664 
665  return b0;
666 }
667 
668 static void
670 {
671  u32 my_cpu_number = vm->thread_index;
674  vlib_buffer_t *b0;
675  bool collect_ip4 = false, collect_ip6 = false;
676  flowprobe_variant_t which = e->key.which;
677  flowprobe_record_t flags = fm->context[which].flags;
678  u16 offset =
679  fm->context[which].next_record_offset_per_worker[my_cpu_number];
680 
681  if (offset < flowprobe_get_headersize ())
682  offset = flowprobe_get_headersize ();
683 
684  b0 = flowprobe_get_buffer (vm, which);
685  /* No available buffer, what to do... */
686  if (b0 == 0)
687  return;
688 
689  if (flags & FLOW_RECORD_L3)
690  {
691  collect_ip4 = which == FLOW_VARIANT_L2_IP4 || which == FLOW_VARIANT_IP4;
692  collect_ip6 = which == FLOW_VARIANT_L2_IP6 || which == FLOW_VARIANT_IP6;
693  }
694 
695  offset += flowprobe_common_add (b0, e, offset);
696 
697  if (flags & FLOW_RECORD_L2)
698  offset += flowprobe_l2_add (b0, e, offset);
699  if (collect_ip6)
700  offset += flowprobe_l3_ip6_add (b0, e, offset);
701  if (collect_ip4)
702  offset += flowprobe_l3_ip4_add (b0, e, offset);
703  if (flags & FLOW_RECORD_L4)
704  offset += flowprobe_l4_add (b0, e, offset);
705 
706  /* Reset per flow-export counters */
707  e->packetcount = 0;
708  e->octetcount = 0;
709  e->last_exported = vlib_time_now (vm);
710 
711  b0->current_length = offset;
712 
713  fm->context[which].next_record_offset_per_worker[my_cpu_number] = offset;
714  /* Time to flush the buffer? */
715  if (offset + fm->template_size[flags] > frm->path_mtu)
716  flowprobe_export_send (vm, b0, which);
717 }
718 
719 uword
722  flowprobe_variant_t which)
723 {
724  u32 n_left_from, *from, *to_next;
725  flowprobe_next_t next_index;
728 
729  unix_time_now_nsec_fraction (&timestamp.sec, &timestamp.nsec);
730 
731  from = vlib_frame_vector_args (frame);
732  n_left_from = frame->n_vectors;
733  next_index = node->cached_next_index;
734 
735  while (n_left_from > 0)
736  {
737  u32 n_left_to_next;
738 
739  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
740 
741  while (n_left_from >= 4 && n_left_to_next >= 2)
742  {
743  u32 next0 = FLOWPROBE_NEXT_DROP;
744  u32 next1 = FLOWPROBE_NEXT_DROP;
745  u16 len0, len1;
746  u32 bi0, bi1;
747  vlib_buffer_t *b0, *b1;
748 
749  /* Prefetch next iteration. */
750  {
751  vlib_buffer_t *p2, *p3;
752 
753  p2 = vlib_get_buffer (vm, from[2]);
754  p3 = vlib_get_buffer (vm, from[3]);
755 
756  vlib_prefetch_buffer_header (p2, LOAD);
757  vlib_prefetch_buffer_header (p3, LOAD);
758 
761  }
762 
763  /* speculatively enqueue b0 and b1 to the current next frame */
764  to_next[0] = bi0 = from[0];
765  to_next[1] = bi1 = from[1];
766  from += 2;
767  to_next += 2;
768  n_left_from -= 2;
769  n_left_to_next -= 2;
770 
771  b0 = vlib_get_buffer (vm, bi0);
772  b1 = vlib_get_buffer (vm, bi1);
773 
774  vnet_feature_next (&next0, b0);
775  vnet_feature_next (&next1, b1);
776 
777  len0 = vlib_buffer_length_in_chain (vm, b0);
779  u16 ethertype0 = clib_net_to_host_u16 (eh0->type);
780 
781  if (PREDICT_TRUE ((b0->flags & VNET_BUFFER_F_FLOW_REPORT) == 0))
782  add_to_flow_record_state (vm, node, fm, b0, timestamp, len0,
784  (which, fm->context[which].flags,
785  ethertype0), 0);
786 
787  len1 = vlib_buffer_length_in_chain (vm, b1);
789  u16 ethertype1 = clib_net_to_host_u16 (eh1->type);
790 
791  if (PREDICT_TRUE ((b1->flags & VNET_BUFFER_F_FLOW_REPORT) == 0))
792  add_to_flow_record_state (vm, node, fm, b1, timestamp, len1,
794  (which, fm->context[which].flags,
795  ethertype1), 0);
796 
797  /* verify speculative enqueues, maybe switch current next frame */
798  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
799  to_next, n_left_to_next,
800  bi0, bi1, next0, next1);
801  }
802 
803  while (n_left_from > 0 && n_left_to_next > 0)
804  {
805  u32 bi0;
806  vlib_buffer_t *b0;
807  u32 next0 = FLOWPROBE_NEXT_DROP;
808  u16 len0;
809 
810  /* speculatively enqueue b0 to the current next frame */
811  bi0 = from[0];
812  to_next[0] = bi0;
813  from += 1;
814  to_next += 1;
815  n_left_from -= 1;
816  n_left_to_next -= 1;
817 
818  b0 = vlib_get_buffer (vm, bi0);
819 
820  vnet_feature_next (&next0, b0);
821 
822  len0 = vlib_buffer_length_in_chain (vm, b0);
824  u16 ethertype0 = clib_net_to_host_u16 (eh0->type);
825 
826  if (PREDICT_TRUE ((b0->flags & VNET_BUFFER_F_FLOW_REPORT) == 0))
827  {
828  flowprobe_trace_t *t = 0;
830  && (b0->flags & VLIB_BUFFER_IS_TRACED)))
831  t = vlib_add_trace (vm, node, b0, sizeof (*t));
832 
833  add_to_flow_record_state (vm, node, fm, b0, timestamp, len0,
835  (which, fm->context[which].flags,
836  ethertype0), t);
837  }
838 
839  /* verify speculative enqueue, maybe switch current next frame */
840  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
841  to_next, n_left_to_next,
842  bi0, next0);
843  }
844 
845  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
846  }
847  return frame->n_vectors;
848 }
849 
850 static uword
853 {
854  return flowprobe_node_fn (vm, node, frame, FLOW_VARIANT_IP4);
855 }
856 
857 static uword
860 {
861  return flowprobe_node_fn (vm, node, frame, FLOW_VARIANT_IP6);
862 }
863 
864 static uword
867 {
868  return flowprobe_node_fn (vm, node, frame, FLOW_VARIANT_L2);
869 }
870 
871 static inline void
873 {
875  vlib_buffer_t *b = flowprobe_get_buffer (vm, which);
876  if (b)
877  flowprobe_export_send (vm, b, which);
878 }
879 
880 void
882 {
884 }
885 
886 void
888 {
890 }
891 
892 void
894 {
898 }
899 
900 
901 static void
902 flowprobe_delete_by_index (u32 my_cpu_number, u32 poolindex)
903 {
906  u32 h;
907 
908  e = pool_elt_at_index (fm->pool_per_worker[my_cpu_number], poolindex);
909 
910  /* Get my index */
911  h = flowprobe_hash (&e->key);
912 
913  /* Reset hash */
914  fm->hash_per_worker[my_cpu_number][h] = ~0;
915 
916  pool_put_index (fm->pool_per_worker[my_cpu_number], poolindex);
917 }
918 
919 
920 /* Per worker process processing the active/passive expired entries */
921 static uword
924 {
928 
929  /*
930  * $$$$ Remove this check from here and track FRM status and disable
931  * this process if required.
932  */
933  if (frm->ipfix_collector.as_u32 == 0 || frm->src_address.as_u32 == 0)
934  {
935  fm->disabled = true;
936  return 0;
937  }
938  fm->disabled = false;
939 
940  u32 cpu_index = os_get_thread_index ();
941  u32 *to_be_removed = 0, *i;
942 
943  /*
944  * Tick the timer when required and process the vector of expired
945  * timers
946  */
947  f64 start_time = vlib_time_now (vm);
948  u32 count = 0;
949 
950  tw_timer_expire_timers_2t_1w_2048sl (fm->timers_per_worker[cpu_index],
951  start_time);
952 
953  vec_foreach (i, fm->expired_passive_per_worker[cpu_index])
954  {
955  u32 exported = 0;
956  f64 now = vlib_time_now (vm);
957  if (now > start_time + 100e-6
958  || exported > FLOW_MAXIMUM_EXPORT_ENTRIES - 1)
959  break;
960 
961  if (pool_is_free_index (fm->pool_per_worker[cpu_index], *i))
962  {
963  clib_warning ("Element is %d is freed already\n", *i);
964  continue;
965  }
966  else
967  e = pool_elt_at_index (fm->pool_per_worker[cpu_index], *i);
968 
969  /* Check last update timestamp. If it is longer than passive time nuke
970  * entry. Otherwise restart timer with what's left
971  * Premature passive timer by more than 10%
972  */
973  if ((now - e->last_updated) < (u64) (fm->passive_timer * 0.9))
974  {
975  u64 delta = fm->passive_timer - (now - e->last_updated);
976  e->passive_timer_handle = tw_timer_start_2t_1w_2048sl
977  (fm->timers_per_worker[cpu_index], *i, 0, delta);
978  }
979  else /* Nuke entry */
980  {
981  vec_add1 (to_be_removed, *i);
982  }
983  /* If anything to report send it to the exporter */
984  if (e->packetcount && now > e->last_exported + fm->active_timer)
985  {
986  exported++;
987  flowprobe_export_entry (vm, e);
988  }
989  count++;
990  }
991  if (count)
992  vec_delete (fm->expired_passive_per_worker[cpu_index], count, 0);
993 
994  vec_foreach (i, to_be_removed) flowprobe_delete_by_index (cpu_index, *i);
995  vec_free (to_be_removed);
996 
997  return 0;
998 }
999 
1000 /* *INDENT-OFF* */
1002  .function = flowprobe_ip4_node_fn,
1003  .name = "flowprobe-ip4",
1004  .vector_size = sizeof (u32),
1005  .format_trace = format_flowprobe_trace,
1007  .n_errors = ARRAY_LEN(flowprobe_error_strings),
1008  .error_strings = flowprobe_error_strings,
1009  .n_next_nodes = FLOWPROBE_N_NEXT,
1010  .next_nodes = FLOWPROBE_NEXT_NODES,
1011 };
1013  .function = flowprobe_ip6_node_fn,
1014  .name = "flowprobe-ip6",
1015  .vector_size = sizeof (u32),
1016  .format_trace = format_flowprobe_trace,
1018  .n_errors = ARRAY_LEN(flowprobe_error_strings),
1019  .error_strings = flowprobe_error_strings,
1020  .n_next_nodes = FLOWPROBE_N_NEXT,
1021  .next_nodes = FLOWPROBE_NEXT_NODES,
1022 };
1024  .function = flowprobe_l2_node_fn,
1025  .name = "flowprobe-l2",
1026  .vector_size = sizeof (u32),
1027  .format_trace = format_flowprobe_trace,
1029  .n_errors = ARRAY_LEN(flowprobe_error_strings),
1030  .error_strings = flowprobe_error_strings,
1031  .n_next_nodes = FLOWPROBE_N_NEXT,
1032  .next_nodes = FLOWPROBE_NEXT_NODES,
1033 };
1035  .function = flowprobe_walker_process,
1036  .name = "flowprobe-walker",
1037  .type = VLIB_NODE_TYPE_INPUT,
1038  .state = VLIB_NODE_STATE_INTERRUPT,
1039 };
1040 /* *INDENT-ON* */
1041 
1042 /*
1043  * fd.io coding-style-patch-verification: ON
1044  *
1045  * Local Variables:
1046  * eval: (c-set-style "gnu")
1047  * End:
1048  */
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:507
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index, VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:124
u8 count
Definition: dhcp.api:208
vlib_node_registration_t flowprobe_ip4_node
(constructor) VLIB_REGISTER_NODE (flowprobe_ip4_node)
Definition: node.c:101
flowprobe_protocol_context_t context[FLOW_N_VARIANTS]
Definition: flowprobe.h:125
format_function_t format_ip_protocol
Definition: format.h:45
flowprobe_variant_t
Definition: flowprobe.h:46
u8 dst_mac[6]
Definition: node.c:45
static void flowprobe_export_entry(vlib_main_t *vm, flowprobe_entry_t *e)
Definition: node.c:669
u16 buffer_size
size of the buffer
Definition: node.c:41
static u32 flowprobe_l2_add(vlib_buffer_t *to_b, flowprobe_entry_t *e, u16 offset)
Definition: node.c:194
u32 ** expired_passive_per_worker
Definition: flowprobe.h:140
#define CLIB_UNUSED(x)
Definition: clib.h:86
ip46_address_t src_address
L3 information.
Definition: node.c:50
ip46_address_t src_address
Definition: flowprobe.h:82
void flowprobe_flush_callback_ip6(void)
Definition: node.c:887
ip4_address_t src_address
Definition: ip4_packet.h:170
static uword flowprobe_ip6_node_fn(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: node.c:858
u8 src_mac[6]
L2 information.
Definition: node.c:44
#define PREDICT_TRUE(x)
Definition: clib.h:119
static void flowprobe_delete_by_index(u32 my_cpu_number, u32 poolindex)
Definition: node.c:902
i16 current_data
signed offset in data[], pre_data[] that we are currently processing.
Definition: buffer.h:110
unsigned long u64
Definition: types.h:89
#define clib_memcpy_fast(a, b, c)
Definition: string.h:81
static void flush_record(flowprobe_variant_t which)
Definition: node.c:872
static f64 vlib_time_now(vlib_main_t *vm)
Definition: main.h:291
flowprobe_key_t key
Definition: flowprobe.h:99
void flowprobe_flush_callback_ip4(void)
Definition: node.c:881
u8 src_address[6]
Definition: packet.h:56
u32 thread_index
Definition: main.h:218
u16 current_length
Nbytes between current data and the end of this buffer.
Definition: buffer.h:113
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:590
static u64 clib_xxhash(u64 key)
Definition: xxhash.h:58
ip4_address_t src_address
Definition: flow_report.h:119
static u32 format_get_indent(u8 *s)
Definition: format.h:72
flowprobe_entry_t * stateless_entry
Definition: flowprobe.h:145
static vlib_buffer_t * flowprobe_get_buffer(vlib_main_t *vm, flowprobe_variant_t which)
Definition: node.c:629
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
u16 flags_and_fragment_offset
Definition: ip4_packet.h:151
u16 template_reports[FLOW_N_RECORDS]
Definition: flowprobe.h:126
flowprobe_entry_t * flowprobe_lookup(u32 my_cpu_number, flowprobe_key_t *k, u32 *poolindex, bool *collision)
Definition: node.c:307
flowprobe_entry_t * flowprobe_create(u32 my_cpu_number, flowprobe_key_t *k, u32 *poolindex)
Definition: node.c:334
u32 tx_sw_if_index
Definition: flowprobe.h:78
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:402
#define pool_get(P, E)
Allocate an object E from a pool P (unspecified alignment).
Definition: pool.h:252
struct _tcp_header tcp_header_t
ip6_address_t src_address
Definition: ip6_packet.h:310
unsigned char u8
Definition: types.h:56
ip46_address_t dst_address
Definition: node.c:51
ip4_address_t ipfix_collector
Definition: flow_report.h:117
double f64
Definition: types.h:142
#define fm
vlib_node_registration_t ip4_lookup_node
(constructor) VLIB_REGISTER_NODE (ip4_lookup_node)
Definition: ip4_forward.c:104
flowprobe_entry_t ** pool_per_worker
Definition: flowprobe.h:136
flow_report_stream_t * streams
Definition: flow_report.h:114
static char * flowprobe_error_strings[]
Definition: node.c:120
flowprobe_variant_t which
Definition: flowprobe.h:87
flow-per-packet plugin header file
static void flowprobe_export_send(vlib_main_t *vm, vlib_buffer_t *b0, flowprobe_variant_t which)
Definition: node.c:518
u8 * format_ethernet_address(u8 *s, va_list *args)
Definition: format.c:44
vlib_node_registration_t flowprobe_ip6_node
(constructor) VLIB_REGISTER_NODE (flowprobe_ip6_node)
Definition: node.c:102
static u32 flowprobe_common_add(vlib_buffer_t *to_b, flowprobe_entry_t *e, u16 offset)
Definition: node.c:155
u64 timestamp
packet timestamp
Definition: node.c:39
vl_api_ip6_address_t ip6
Definition: one.api:424
void flowprobe_flush_callback_l2(void)
Definition: node.c:893
ip4_address_t dst_address
Definition: ip4_packet.h:170
u8 dst_address[6]
Definition: packet.h:55
u8 * format_white_space(u8 *s, va_list *va)
Definition: std-formats.c:129
vlib_frame_t ** frames_per_worker
frames containing ipfix buffers, per-worker thread
Definition: flowprobe.h:70
u16 ethertype
Ethertype.
Definition: node.c:47
u32 ** hash_per_worker
Definition: flowprobe.h:135
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:203
vlib_node_registration_t flowprobe_walker_node
(constructor) VLIB_REGISTER_NODE (flowprobe_walker_node)
Definition: node.c:1034
vlib_frame_t * vlib_get_frame_to_node(vlib_main_t *vm, u32 to_node_index)
Definition: main.c:182
union flowprobe_entry_t::@52 prot
unsigned int u32
Definition: types.h:88
static void unix_time_now_nsec_fraction(u32 *sec, u32 *nsec)
Definition: time.h:282
static u32 vlib_get_buffer_index(vlib_main_t *vm, void *p)
Translate buffer pointer into buffer index.
Definition: buffer_funcs.h:293
u8 ht_log2len
Per CPU flow-state.
Definition: flowprobe.h:134
vl_api_fib_path_type_t type
Definition: fib_types.api:123
u32 tx_sw_if_index
Definition: node.c:37
flow_report_main_t flow_report_main
Definition: flow_report.c:21
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:534
vlib_node_registration_t flowprobe_l2_node
(constructor) VLIB_REGISTER_NODE (flowprobe_l2_node)
Definition: node.c:103
unsigned short u16
Definition: types.h:57
void vlib_put_frame_to_node(vlib_main_t *vm, u32 to_node_index, vlib_frame_t *f)
Definition: main.c:216
vec_header_t h
Definition: buffer.c:322
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:229
u32 rx_sw_if_index
Definition: flowprobe.h:77
u16 src_port
L4 information.
Definition: node.c:56
#define PREDICT_FALSE(x)
Definition: clib.h:118
u32 passive_timer_handle
Definition: flowprobe.h:106
vl_api_ip4_address_t ip4
Definition: one.api:376
static uword flowprobe_walker_process(vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f)
Definition: node.c:922
static u8 * format_flowprobe_trace(u8 *s, va_list *args)
Definition: node.c:72
u32 node_index
Node index.
Definition: node.h:498
#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:224
#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
static u32 version_length(u16 length)
Definition: ipfix_packet.h:33
vlib_main_t * vm
Definition: in2out_ed.c:1599
struct flowprobe_entry_t::@52::@53 tcp
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1150
format_function_t format_ip46_address
Definition: ip46_address.h:50
u16 dst_port
Definition: node.c:57
static u32 flowprobe_hash(flowprobe_key_t *k)
Definition: node.c:287
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
u32 flags
Definition: vhost_user.h:248
u16 n_vectors
Definition: node.h:399
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:80
u64 packetcount
Definition: flowprobe.h:100
f64 last_exported
Definition: flowprobe.h:105
sll srl srl sll sra u16x4 i
Definition: vector_sse42.h:317
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:380
static_always_inline void vnet_feature_next(u32 *next0, vlib_buffer_t *b0)
Definition: feature.h:322
#define clib_warning(format, args...)
Definition: error.h:59
u8 data[]
Packet data.
Definition: buffer.h:181
static u16 flowprobe_get_headersize(void)
Definition: node.c:511
#define pool_is_free_index(P, I)
Use free bitmap to query whether given index is free.
Definition: pool.h:299
#define ARRAY_LEN(x)
Definition: clib.h:66
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:483
flowprobe_error_t
Definition: node.c:112
vlib_main_t vlib_node_runtime_t * node
Definition: in2out_ed.c:1599
timestamp_nsec_t flow_start
Definition: flowprobe.h:102
vl_api_mac_address_t src_mac
Definition: acl_types.api:93
flowprobe_record_t
Definition: flowprobe.h:35
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:517
#define pool_put_index(p, i)
Free pool element with given index.
Definition: pool.h:331
#define ASSERT(truth)
u32 rx_sw_if_index
interface handle
Definition: node.c:36
vlib_main_t * vlib_main
Definition: flow_report.h:136
static u32 flowprobe_l3_ip6_add(vlib_buffer_t *to_b, flowprobe_entry_t *e, u16 offset)
Definition: node.c:214
u16 ip4_tcp_udp_compute_checksum(vlib_main_t *vm, vlib_buffer_t *p0, ip4_header_t *ip0)
Definition: ip4_forward.c:1367
#define vec_delete(V, N, M)
Delete N elements starting at element M.
Definition: vec.h:852
#define foreach_flowprobe_error
Definition: node.c:106
static char * flowprobe_variant_strings[]
Definition: node.c:62
static flowprobe_variant_t flowprobe_get_variant(flowprobe_variant_t which, flowprobe_record_t flags, u16 ethertype)
Definition: node.c:139
static u32 flowprobe_l4_add(vlib_buffer_t *to_b, flowprobe_entry_t *e, u16 offset)
Definition: node.c:266
#define FLOW_MAXIMUM_EXPORT_ENTRIES
Definition: flowprobe.h:61
static vlib_main_t * vlib_get_main(void)
Definition: global_funcs.h:23
flowprobe_main_t flowprobe_main
Definition: flowprobe.c:38
static void * vlib_add_trace(vlib_main_t *vm, vlib_node_runtime_t *r, vlib_buffer_t *b, u32 n_data_bytes)
Definition: trace_funcs.h:55
flowprobe_variant_t which
Definition: node.c:59
struct _vlib_node_registration vlib_node_registration_t
template key/value backing page structure
Definition: bihash_doc.h:44
static u32 ipfix_set_id_length(u16 set_id, u16 length)
Definition: ipfix_packet.h:121
vlib_buffer_t ** buffers_per_worker
ipfix buffers under construction, per-worker thread
Definition: flowprobe.h:68
Definition: defs.h:47
u16 payload_length
Definition: ip6_packet.h:301
vl_api_address_t ip
Definition: l2.api:501
#define NTP_TIMESTAMP
Definition: node.c:152
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
#define VLIB_BUFFER_TRACE_TRAJECTORY_INIT(b)
Definition: buffer.h:492
VLIB buffer representation.
Definition: buffer.h:102
u64 uword
Definition: types.h:112
u16 template_size[FLOW_N_RECORDS]
Definition: flowprobe.h:127
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:244
static_always_inline uword os_get_thread_index(void)
Definition: os.h:63
f64 last_updated
Definition: flowprobe.h:104
static void add_to_flow_record_state(vlib_main_t *vm, vlib_node_runtime_t *node, flowprobe_main_t *fm, vlib_buffer_t *b, timestamp_nsec_t timestamp, u16 length, flowprobe_variant_t which, flowprobe_trace_t *t)
Definition: node.c:360
#define FLOWPROBE_NEXT_NODES
Definition: node.c:133
struct clib_bihash_value offset
template key/value backing page structure
f64 timestamp
Definition: vpe_types.api:27
#define vnet_buffer(b)
Definition: buffer.h:417
static uword flowprobe_l2_node_fn(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: node.c:865
ip46_address_t dst_address
Definition: flowprobe.h:83
#define vec_foreach(var, vec)
Vector iterator.
vlib_main_t vlib_node_runtime_t vlib_frame_t * frame
Definition: in2out_ed.c:1600
u16 flags
Copy of main node flags.
Definition: node.h:511
static u32 flowprobe_l3_ip4_add(vlib_buffer_t *to_b, flowprobe_entry_t *e, u16 offset)
Definition: node.c:240
u8 ip_version_and_header_length
Definition: ip4_packet.h:138
u16 * next_record_offset_per_worker
next record offset, per worker thread
Definition: flowprobe.h:72
flowprobe_next_t
Definition: node.c:126
timestamp_nsec_t flow_end
Definition: flowprobe.h:103
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:304
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
static u32 vlib_buffer_alloc(vlib_main_t *vm, u32 *buffers, u32 n_buffers)
Allocate buffers into supplied array.
Definition: buffer_funcs.h:677
flowprobe_record_t flags
Definition: flowprobe.h:66
static uword flowprobe_ip4_node_fn(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: node.c:851
u64 octetcount
Definition: flowprobe.h:101
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
uword flowprobe_node_fn(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, flowprobe_variant_t which)
Definition: node.c:720
Definition: flowprobe.h:97
Definition: defs.h:46
ip6_address_t dst_address
Definition: ip6_packet.h:310