FD.io VPP  v18.04-17-g3a0d853
Vector Packet Processing
encap.c
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1 
2 /*
3  * Copyright (c) 2015 Cisco and/or its affiliates.
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at:
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 #include <vppinfra/error.h>
17 #include <vppinfra/hash.h>
18 #include <vnet/vnet.h>
19 #include <vnet/ip/ip.h>
20 #include <vnet/ethernet/ethernet.h>
21 #include <vnet/vxlan/vxlan.h>
22 
23 /* Statistics (not all errors) */
24 #define foreach_vxlan_encap_error \
25 _(ENCAPSULATED, "good packets encapsulated")
26 
27 static char * vxlan_encap_error_strings[] = {
28 #define _(sym,string) string,
30 #undef _
31 };
32 
33 typedef enum {
34 #define _(sym,str) VXLAN_ENCAP_ERROR_##sym,
36 #undef _
39 
40 typedef enum {
44 
45 typedef struct {
49 
50 u8 * format_vxlan_encap_trace (u8 * s, va_list * args)
51 {
52  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
53  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
55  = va_arg (*args, vxlan_encap_trace_t *);
56 
57  s = format (s, "VXLAN encap to vxlan_tunnel%d vni %d",
58  t->tunnel_index, t->vni);
59  return s;
60 }
61 
64  vlib_node_runtime_t * node,
65  vlib_frame_t * from_frame,
66  u8 is_ip4, u8 csum_offload)
67 {
68  u32 n_left_from, next_index, * from, * to_next;
69  vxlan_main_t * vxm = &vxlan_main;
70  vnet_main_t * vnm = vxm->vnet_main;
72  vlib_combined_counter_main_t * tx_counter =
74  u32 pkts_encapsulated = 0;
75  u32 thread_index = vlib_get_thread_index();
76  u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
77  u32 sw_if_index0 = 0, sw_if_index1 = 0;
78  u32 next0 = 0, next1 = 0;
79  vxlan_tunnel_t * t0 = NULL, * t1 = NULL;
80  index_t dpoi_idx0 = INDEX_INVALID, dpoi_idx1 = INDEX_INVALID;
81 
82  from = vlib_frame_vector_args (from_frame);
83  n_left_from = from_frame->n_vectors;
84 
85  next_index = node->cached_next_index;
86  stats_sw_if_index = node->runtime_data[0];
87  stats_n_packets = stats_n_bytes = 0;
88 
89  STATIC_ASSERT_SIZEOF(ip6_vxlan_header_t, 56);
90  STATIC_ASSERT_SIZEOF(ip4_vxlan_header_t, 36);
91 
92  word const underlay_hdr_len = is_ip4 ?
93  sizeof(ip4_vxlan_header_t) : sizeof(ip6_vxlan_header_t);
94  u16 const l3_len = is_ip4 ? sizeof(ip4_header_t) : sizeof(ip6_header_t);
95  u32 const csum_flags = is_ip4 ?
96  VNET_BUFFER_F_OFFLOAD_IP_CKSUM | VNET_BUFFER_F_IS_IP4 |
97  VNET_BUFFER_F_OFFLOAD_UDP_CKSUM :
98  VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
99 
100  while (n_left_from > 0)
101  {
102  u32 n_left_to_next;
103 
104  vlib_get_next_frame (vm, node, next_index,
105  to_next, n_left_to_next);
106 
107  while (n_left_from >= 4 && n_left_to_next >= 2)
108  {
109  /* Prefetch next iteration. */
110  {
111  vlib_buffer_t * p2, * p3;
112 
113  p2 = vlib_get_buffer (vm, from[2]);
114  p3 = vlib_get_buffer (vm, from[3]);
115 
116  vlib_prefetch_buffer_header (p2, LOAD);
117  vlib_prefetch_buffer_header (p3, LOAD);
118 
121  }
122 
123  u32 bi0 = from[0];
124  u32 bi1 = from[1];
125 
126  vlib_buffer_t * b0 = vlib_get_buffer (vm, bi0);
127  vlib_buffer_t * b1 = vlib_get_buffer (vm, bi1);
128  u32 flow_hash0 = vnet_l2_compute_flow_hash (b0);
129  u32 flow_hash1 = vnet_l2_compute_flow_hash (b1);
130 
131  to_next[0] = bi0;
132  to_next[1] = bi1;
133  from += 2;
134  to_next += 2;
135  n_left_to_next -= 2;
136  n_left_from -= 2;
137 
138  /* Get next node index and adj index from tunnel next_dpo */
139  if (sw_if_index0 != vnet_buffer(b0)->sw_if_index[VLIB_TX])
140  {
141  sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
142  vnet_hw_interface_t *hi0 =
143  vnet_get_sup_hw_interface (vnm, sw_if_index0);
144  t0 = &vxm->tunnels[hi0->dev_instance];
145  /* Note: change to always set next0 if it may set to drop */
146  next0 = t0->next_dpo.dpoi_next_node;
147  dpoi_idx0 = t0->next_dpo.dpoi_index;
148  }
149 
150  /* Get next node index and adj index from tunnel next_dpo */
151  if (sw_if_index1 != vnet_buffer(b1)->sw_if_index[VLIB_TX])
152  {
153  if (sw_if_index0 == vnet_buffer(b1)->sw_if_index[VLIB_TX])
154  {
155  sw_if_index1 = sw_if_index0;
156  t1 = t0;
157  next1 = next0;
158  dpoi_idx1 = dpoi_idx0;
159  }
160  else
161  {
162  sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_TX];
163  vnet_hw_interface_t *hi1 =
164  vnet_get_sup_hw_interface (vnm, sw_if_index1);
165  t1 = &vxm->tunnels[hi1->dev_instance];
166  /* Note: change to always set next1 if it may set to drop */
167  next1 = t1->next_dpo.dpoi_next_node;
168  dpoi_idx1 = t1->next_dpo.dpoi_index;
169  }
170  }
171 
172  vnet_buffer(b0)->ip.adj_index[VLIB_TX] = dpoi_idx0;
173  vnet_buffer(b1)->ip.adj_index[VLIB_TX] = dpoi_idx1;
174 
175  ASSERT(vec_len(t0->rewrite) == underlay_hdr_len);
176  ASSERT(vec_len(t1->rewrite) == underlay_hdr_len);
177 
178  vlib_buffer_advance (b0, -underlay_hdr_len);
179  vlib_buffer_advance (b1, -underlay_hdr_len);
180 
181  u32 len0 = vlib_buffer_length_in_chain (vm, b0);
182  u32 len1 = vlib_buffer_length_in_chain (vm, b1);
183  u16 payload_l0 = clib_host_to_net_u16 (len0 - l3_len);
184  u16 payload_l1 = clib_host_to_net_u16 (len1 - l3_len);
185 
186  ip4_header_t * ip4_0, * ip4_1;
187  ip6_header_t * ip6_0, * ip6_1;
188  udp_header_t * udp0, * udp1;
189  u8 * l3_0, * l3_1;
190  if (is_ip4)
191  {
192  ip4_vxlan_header_t * hdr0 = vlib_buffer_get_current(b0);
193  ip4_vxlan_header_t * rewrite0 = (void *)t0->rewrite;
194  ip4_vxlan_header_t * hdr1 = vlib_buffer_get_current(b1);
195  ip4_vxlan_header_t * rewrite1 = (void *)t1->rewrite;
196  *hdr0 = *rewrite0;
197  *hdr1 = *rewrite1;
198 
199  /* Fix the IP4 checksum and length */
200  ip4_0 = &hdr0->ip4;
201  ip4_1 = &hdr1->ip4;
202  ip4_0->length = clib_host_to_net_u16 (len0);
203  ip4_1->length = clib_host_to_net_u16 (len1);
204 
205  l3_0 = (u8 *)ip4_0;
206  l3_1 = (u8 *)ip4_1;
207  udp0 = &hdr0->udp;
208  udp1 = &hdr1->udp;
209  }
210  else /* ipv6 */
211  {
212  ip6_vxlan_header_t * hdr0 = vlib_buffer_get_current(b0);
213  ip6_vxlan_header_t * rewrite0 = (void *) t0->rewrite;
214  ip6_vxlan_header_t * hdr1 = vlib_buffer_get_current(b0);
215  ip6_vxlan_header_t * rewrite1 = (void *) t1->rewrite;
216  *hdr0 = *rewrite0;
217  *hdr1 = *rewrite1;
218 
219  /* Fix IP6 payload length */
220  ip6_0 = &hdr0->ip6;
221  ip6_1 = &hdr1->ip6;
222  ip6_0->payload_length = payload_l0;
223  ip6_1->payload_length = payload_l1;
224 
225  l3_0 = (u8 *)ip6_0;
226  l3_1 = (u8 *)ip6_1;
227  udp0 = &hdr0->udp;
228  udp1 = &hdr1->udp;
229  }
230 
231  /* Fix UDP length and set source port */
232  udp0->length = payload_l0;
233  udp0->src_port = flow_hash0;
234  udp1->length = payload_l1;
235  udp1->src_port = flow_hash1;
236 
237  if (csum_offload)
238  {
239  b0->flags |= csum_flags;
240  vnet_buffer (b0)->l3_hdr_offset = l3_0 - b0->data;
241  vnet_buffer (b0)->l4_hdr_offset = (u8 *) udp0 - b0->data;
242  b1->flags |= csum_flags;
243  vnet_buffer (b1)->l3_hdr_offset = l3_1 - b1->data;
244  vnet_buffer (b1)->l4_hdr_offset = (u8 *) udp1 - b1->data;
245  }
246  /* IPv4 UDP checksum only if checksum offload is used */
247  else if (is_ip4)
248  {
249  ip_csum_t sum0 = ip4_0->checksum;
250  sum0 = ip_csum_update (sum0, 0, ip4_0->length, ip4_header_t,
251  length /* changed member */);
252  ip4_0->checksum = ip_csum_fold (sum0);
253  ip_csum_t sum1 = ip4_1->checksum;
254  sum1 = ip_csum_update (sum1, 0, ip4_1->length, ip4_header_t,
255  length /* changed member */);
256  ip4_1->checksum = ip_csum_fold (sum1);
257  }
258  /* IPv6 UDP checksum is mandatory */
259  else
260  {
261  int bogus = 0;
262 
264  (vm, b0, ip6_0, &bogus);
265  ASSERT(bogus == 0);
266  if (udp0->checksum == 0)
267  udp0->checksum = 0xffff;
269  (vm, b1, ip6_1, &bogus);
270  ASSERT(bogus == 0);
271  if (udp1->checksum == 0)
272  udp1->checksum = 0xffff;
273  }
274 
275  /* Batch stats increment on the same vxlan tunnel so counter is not
276  incremented per packet. Note stats are still incremented for deleted
277  and admin-down tunnel where packets are dropped. It is not worthwhile
278  to check for this rare case and affect normal path performance. */
279  if (sw_if_index0 == sw_if_index1)
280  {
281  if (PREDICT_FALSE(sw_if_index0 != stats_sw_if_index))
282  {
283  if (stats_n_packets)
284  {
285  vlib_increment_combined_counter (tx_counter, thread_index,
286  stats_sw_if_index, stats_n_packets, stats_n_bytes);
287  stats_n_packets = stats_n_bytes = 0;
288  }
289  stats_sw_if_index = sw_if_index0;
290  }
291  stats_n_packets += 2;
292  stats_n_bytes += len0 + len1;
293  }
294  else
295  {
296  vlib_increment_combined_counter (tx_counter, thread_index,
297  sw_if_index0, 1, len0);
298  vlib_increment_combined_counter (tx_counter, thread_index,
299  sw_if_index1, 1, len1);
300  }
301  pkts_encapsulated += 2;
302 
303  if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
304  {
305  vxlan_encap_trace_t *tr =
306  vlib_add_trace (vm, node, b0, sizeof (*tr));
307  tr->tunnel_index = t0 - vxm->tunnels;
308  tr->vni = t0->vni;
309  }
310 
311  if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
312  {
313  vxlan_encap_trace_t *tr =
314  vlib_add_trace (vm, node, b1, sizeof (*tr));
315  tr->tunnel_index = t1 - vxm->tunnels;
316  tr->vni = t1->vni;
317  }
318 
319  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
320  to_next, n_left_to_next,
321  bi0, bi1, next0, next1);
322  }
323 
324  while (n_left_from > 0 && n_left_to_next > 0)
325  {
326  u32 bi0 = from[0];
327  vlib_buffer_t * b0 = vlib_get_buffer (vm, bi0);
328  u32 flow_hash0 = vnet_l2_compute_flow_hash(b0);
329 
330  to_next[0] = bi0;
331  from += 1;
332  to_next += 1;
333  n_left_from -= 1;
334  n_left_to_next -= 1;
335 
336  /* Get next node index and adj index from tunnel next_dpo */
337  if (sw_if_index0 != vnet_buffer(b0)->sw_if_index[VLIB_TX])
338  {
339  sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
340  vnet_hw_interface_t *hi0 =
341  vnet_get_sup_hw_interface (vnm, sw_if_index0);
342  t0 = &vxm->tunnels[hi0->dev_instance];
343  /* Note: change to always set next0 if it may be set to drop */
344  next0 = t0->next_dpo.dpoi_next_node;
345  dpoi_idx0 = t0->next_dpo.dpoi_index;
346  }
347  vnet_buffer(b0)->ip.adj_index[VLIB_TX] = dpoi_idx0;
348 
349  ASSERT(vec_len(t0->rewrite) == underlay_hdr_len);
350  vlib_buffer_advance (b0, -underlay_hdr_len);
351 
352  u32 len0 = vlib_buffer_length_in_chain (vm, b0);
353  u16 payload_l0 = clib_host_to_net_u16 (len0 - l3_len);
354 
355  udp_header_t * udp0;
356  ip4_header_t * ip4_0;
357  ip6_header_t * ip6_0;
358  u8 * l3_0;
359  if (is_ip4)
360  {
361  ip4_vxlan_header_t * rewrite = (void *)t0->rewrite;
362  ip4_vxlan_header_t * hdr = vlib_buffer_get_current(b0);
363  *hdr = *rewrite;
364 
365  /* Fix the IP4 checksum and length */
366  ip4_0 = &hdr->ip4;
367  ip4_0->length = clib_host_to_net_u16 (len0);
368 
369  l3_0 = (u8*)ip4_0;
370  udp0 = &hdr->udp;
371  }
372  else /* ip6 path */
373  {
374  ip6_vxlan_header_t * hdr = vlib_buffer_get_current(b0);
375  ip6_vxlan_header_t * rewrite = (void *) t0->rewrite;
376  *hdr = *rewrite;
377 
378  /* Fix IP6 payload length */
379  ip6_0 = &hdr->ip6;
380  ip6_0->payload_length = payload_l0;
381 
382  l3_0 = (u8 *)ip6_0;
383  udp0 = &hdr->udp;
384  }
385 
386  /* Fix UDP length and set source port */
387  udp0->length = payload_l0;
388  udp0->src_port = flow_hash0;
389 
390  if (csum_offload)
391  {
392  b0->flags |= csum_flags;
393  vnet_buffer (b0)->l3_hdr_offset = l3_0 - b0->data;
394  vnet_buffer (b0)->l4_hdr_offset = (u8 *) udp0 - b0->data;
395  }
396  /* IPv4 UDP checksum only if checksum offload is used */
397  else if (is_ip4)
398  {
399  ip_csum_t sum0 = ip4_0->checksum;
400  sum0 = ip_csum_update (sum0, 0, ip4_0->length, ip4_header_t,
401  length /* changed member */);
402  ip4_0->checksum = ip_csum_fold (sum0);
403  }
404  /* IPv6 UDP checksum is mandatory */
405  else
406  {
407  int bogus = 0;
408 
410  (vm, b0, ip6_0, &bogus);
411  ASSERT(bogus == 0);
412  if (udp0->checksum == 0)
413  udp0->checksum = 0xffff;
414  }
415 
416  /* Batch stats increment on the same vxlan tunnel so counter is not
417  incremented per packet. Note stats are still incremented for deleted
418  and admin-down tunnel where packets are dropped. It is not worthwhile
419  to check for this rare case and affect normal path performance. */
420  if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
421  {
422  if (stats_n_packets)
423  {
424  vlib_increment_combined_counter (tx_counter, thread_index,
425  stats_sw_if_index, stats_n_packets, stats_n_bytes);
426  stats_n_bytes = stats_n_packets = 0;
427  }
428  stats_sw_if_index = sw_if_index0;
429  }
430  stats_n_packets += 1;
431  stats_n_bytes += len0;
432  pkts_encapsulated ++;
433 
434  if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
435  {
436  vxlan_encap_trace_t *tr =
437  vlib_add_trace (vm, node, b0, sizeof (*tr));
438  tr->tunnel_index = t0 - vxm->tunnels;
439  tr->vni = t0->vni;
440  }
441  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
442  to_next, n_left_to_next,
443  bi0, next0);
444  }
445 
446  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
447  }
448 
449  /* Do we still need this now that tunnel tx stats is kept? */
451  VXLAN_ENCAP_ERROR_ENCAPSULATED,
452  pkts_encapsulated);
453 
454  /* Increment any remaining batch stats */
455  if (stats_n_packets)
456  {
457  vlib_increment_combined_counter (tx_counter, thread_index,
458  stats_sw_if_index, stats_n_packets, stats_n_bytes);
459  node->runtime_data[0] = stats_sw_if_index;
460  }
461 
462  return from_frame->n_vectors;
463 }
464 
465 static uword
467  vlib_node_runtime_t * node,
468  vlib_frame_t * from_frame)
469 {
470  /* Disable chksum offload as setup overhead in tx node is not worthwhile
471  for ip4 header checksum only, unless udp checksum is also required */
472  return vxlan_encap_inline (vm, node, from_frame, /* is_ip4 */ 1,
473  /* csum_offload */ 0);
474 }
475 
476 static uword
478  vlib_node_runtime_t * node,
479  vlib_frame_t * from_frame)
480 {
481  /* Enable checksum offload for ip6 as udp checksum is mandatory, */
482  return vxlan_encap_inline (vm, node, from_frame, /* is_ip4 */ 0,
483  /* csum_offload */ 1);
484 }
485 
487  .function = vxlan4_encap,
488  .name = "vxlan4-encap",
489  .vector_size = sizeof (u32),
490  .format_trace = format_vxlan_encap_trace,
491  .type = VLIB_NODE_TYPE_INTERNAL,
493  .error_strings = vxlan_encap_error_strings,
494  .n_next_nodes = VXLAN_ENCAP_N_NEXT,
495  .next_nodes = {
496  [VXLAN_ENCAP_NEXT_DROP] = "error-drop",
497  },
498 };
499 
501 
503  .function = vxlan6_encap,
504  .name = "vxlan6-encap",
505  .vector_size = sizeof (u32),
506  .format_trace = format_vxlan_encap_trace,
507  .type = VLIB_NODE_TYPE_INTERNAL,
509  .error_strings = vxlan_encap_error_strings,
510  .n_next_nodes = VXLAN_ENCAP_N_NEXT,
511  .next_nodes = {
512  [VXLAN_ENCAP_NEXT_DROP] = "error-drop",
513  },
514 };
515 
517 
#define CLIB_UNUSED(x)
Definition: clib.h:79
static void vlib_increment_combined_counter(vlib_combined_counter_main_t *cm, u32 thread_index, u32 index, u64 n_packets, u64 n_bytes)
Increment a combined counter.
Definition: counter.h:211
u8 runtime_data[0]
Function dependent node-runtime data.
Definition: node.h:464
static vnet_hw_interface_t * vnet_get_sup_hw_interface(vnet_main_t *vnm, u32 sw_if_index)
vnet_interface_main_t interface_main
Definition: vnet.h:56
#define foreach_vxlan_encap_error
Definition: encap.c:24
vxlan_encap_error_t
Definition: encap.c:33
#define NULL
Definition: clib.h:55
u32 index_t
A Data-Path Object is an object that represents actions that are applied to packets are they are swit...
Definition: dpo.h:41
uword ip_csum_t
Definition: ip_packet.h:90
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
VLIB_NODE_FUNCTION_MULTIARCH(l2t_encap_node, l2t_encap_node_fn)
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:107
vnet_main_t * vnet_main
Definition: vxlan.h:161
static char * vxlan_encap_error_strings[]
Definition: encap.c:27
#define always_inline
Definition: clib.h:92
vlib_combined_counter_main_t * combined_sw_if_counters
Definition: interface.h:718
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:191
u8 * rewrite
Definition: vxlan.h:73
static u32 vnet_l2_compute_flow_hash(vlib_buffer_t *b)
Definition: l2_input.h:257
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:209
vxlan_main_t vxlan_main
Definition: vxlan.c:41
#define PREDICT_FALSE(x)
Definition: clib.h:105
u32 node_index
Node index.
Definition: node.h:437
#define vlib_validate_buffer_enqueue_x2(vm, node, next_index, to_next, n_left_to_next, bi0, bi1, next0, next1)
Finish enqueueing two buffers forward in the graph.
Definition: buffer_node.h:70
#define vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, n_left_to_next, bi0, next0)
Finish enqueueing one buffer forward in the graph.
Definition: buffer_node.h:218
#define vlib_get_next_frame(vm, node, next_index, vectors, n_vectors_left)
Get pointer to next frame vector data by (vlib_node_runtime_t, next_index).
Definition: node_funcs.h:364
u8 * format_vxlan_encap_trace(u8 *s, va_list *args)
Definition: encap.c:50
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1166
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:143
u16 n_vectors
Definition: node.h:344
static_always_inline uword vlib_get_thread_index(void)
Definition: threads.h:221
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:74
vlib_main_t * vm
Definition: buffer.c:294
#define ARRAY_LEN(x)
Definition: clib.h:59
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:454
u16 ip6_tcp_udp_icmp_compute_checksum(vlib_main_t *vm, vlib_buffer_t *p0, ip6_header_t *ip0, int *bogus_lengthp)
Definition: ip6_forward.c:865
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:456
#define ASSERT(truth)
unsigned int u32
Definition: types.h:88
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:222
u64 uword
Definition: types.h:112
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
static uword vxlan_encap_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame, u8 is_ip4, u8 csum_offload)
Definition: encap.c:63
Definition: defs.h:47
unsigned short u16
Definition: types.h:57
u16 payload_length
Definition: ip6_packet.h:333
i64 word
Definition: types.h:111
index_t dpoi_index
the index of objects of that type
Definition: dpo.h:184
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
unsigned char u8
Definition: types.h:56
#define INDEX_INVALID
Invalid index - used when no index is known blazoned capitals INVALID speak volumes where ~0 does not...
Definition: dpo.h:47
static uword vxlan6_encap(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: encap.c:477
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:267
#define ip_csum_update(sum, old, new, type, field)
Definition: ip_packet.h:139
A collection of combined counters.
Definition: counter.h:180
vxlan_encap_next_t
Definition: encap.c:40
#define vnet_buffer(b)
Definition: buffer.h:372
vlib_node_registration_t vxlan4_encap_node
(constructor) VLIB_REGISTER_NODE (vxlan4_encap_node)
Definition: encap.c:486
u8 data[0]
Packet data.
Definition: buffer.h:179
vlib_node_registration_t vxlan6_encap_node
(constructor) VLIB_REGISTER_NODE (vxlan6_encap_node)
Definition: encap.c:502
dpo_id_t next_dpo
Definition: vxlan.h:76
u16 dpoi_next_node
The next VLIB node to follow.
Definition: dpo.h:180
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
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:111
static uword vxlan4_encap(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: encap.c:466
#define STATIC_ASSERT_SIZEOF(d, s)
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:57
vxlan_tunnel_t * tunnels
Definition: vxlan.h:142
static u16 ip_csum_fold(ip_csum_t c)
Definition: ip_packet.h:145