FD.io VPP  v19.04.4-rc0-5-ge88582fac
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 #include <vnet/qos/qos_types.h>
23 #include <vnet/adj/rewrite.h>
24 
25 /* Statistics (not all errors) */
26 #define foreach_vxlan_encap_error \
27 _(ENCAPSULATED, "good packets encapsulated")
28 
29 static char * vxlan_encap_error_strings[] = {
30 #define _(sym,string) string,
32 #undef _
33 };
34 
35 typedef enum {
36 #define _(sym,str) VXLAN_ENCAP_ERROR_##sym,
38 #undef _
41 
42 typedef enum {
46 
47 typedef struct {
51 
52 #ifndef CLIB_MARCH_VARIANT
53 u8 * format_vxlan_encap_trace (u8 * s, va_list * args)
54 {
55  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
56  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
58  = va_arg (*args, vxlan_encap_trace_t *);
59 
60  s = format (s, "VXLAN encap to vxlan_tunnel%d vni %d",
61  t->tunnel_index, t->vni);
62  return s;
63 }
64 #endif
65 
68  vlib_node_runtime_t * node,
69  vlib_frame_t * from_frame,
70  u8 is_ip4, u8 csum_offload)
71 {
72  u32 n_left_from, next_index, * from, * to_next;
73  vxlan_main_t * vxm = &vxlan_main;
74  vnet_main_t * vnm = vxm->vnet_main;
76  vlib_combined_counter_main_t * tx_counter =
78  u32 pkts_encapsulated = 0;
79  u32 thread_index = vlib_get_thread_index();
80  u32 sw_if_index0 = 0, sw_if_index1 = 0;
81  u32 next0 = 0, next1 = 0;
82  vxlan_tunnel_t * t0 = NULL, * t1 = NULL;
83  index_t dpoi_idx0 = INDEX_INVALID, dpoi_idx1 = INDEX_INVALID;
84 
85  from = vlib_frame_vector_args (from_frame);
86  n_left_from = from_frame->n_vectors;
87 
88  next_index = node->cached_next_index;
89 
90  STATIC_ASSERT_SIZEOF(ip6_vxlan_header_t, 56);
91  STATIC_ASSERT_SIZEOF(ip4_vxlan_header_t, 36);
92 
93  u8 const underlay_hdr_len = is_ip4 ?
94  sizeof(ip4_vxlan_header_t) : sizeof(ip6_vxlan_header_t);
95  u16 const l3_len = is_ip4 ? sizeof(ip4_header_t) : sizeof(ip6_header_t);
96  u32 const csum_flags = is_ip4 ?
97  VNET_BUFFER_F_OFFLOAD_IP_CKSUM | VNET_BUFFER_F_IS_IP4 |
98  VNET_BUFFER_F_OFFLOAD_UDP_CKSUM :
99  VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
100 
101  while (n_left_from > 0)
102  {
103  u32 n_left_to_next;
104 
105  vlib_get_next_frame (vm, node, next_index,
106  to_next, n_left_to_next);
107 
108  while (n_left_from >= 4 && n_left_to_next >= 2)
109  {
110  /* Prefetch next iteration. */
111  {
112  vlib_buffer_t * p2, * p3;
113 
114  p2 = vlib_get_buffer (vm, from[2]);
115  p3 = vlib_get_buffer (vm, from[3]);
116 
117  vlib_prefetch_buffer_header (p2, LOAD);
118  vlib_prefetch_buffer_header (p3, LOAD);
119 
122  }
123 
124  u32 bi0 = to_next[0] = from[0];
125  u32 bi1 = to_next[1] = from[1];
126  from += 2;
127  to_next += 2;
128  n_left_to_next -= 2;
129  n_left_from -= 2;
130 
131  vlib_buffer_t * b0 = vlib_get_buffer (vm, bi0);
132  vlib_buffer_t * b1 = vlib_get_buffer (vm, bi1);
133  u32 flow_hash0 = vnet_l2_compute_flow_hash (b0);
134  u32 flow_hash1 = vnet_l2_compute_flow_hash (b1);
135 
136  /* Get next node index and adj index from tunnel next_dpo */
137  if (sw_if_index0 != vnet_buffer(b0)->sw_if_index[VLIB_TX])
138  {
139  sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
140  vnet_hw_interface_t *hi0 =
141  vnet_get_sup_hw_interface (vnm, sw_if_index0);
142  t0 = &vxm->tunnels[hi0->dev_instance];
143  /* Note: change to always set next0 if it may set to drop */
144  next0 = t0->next_dpo.dpoi_next_node;
145  dpoi_idx0 = t0->next_dpo.dpoi_index;
146  }
147 
148  /* Get next node index and adj index from tunnel next_dpo */
149  if (sw_if_index1 != vnet_buffer(b1)->sw_if_index[VLIB_TX])
150  {
151  if (sw_if_index0 == vnet_buffer(b1)->sw_if_index[VLIB_TX])
152  {
153  sw_if_index1 = sw_if_index0;
154  t1 = t0;
155  next1 = next0;
156  dpoi_idx1 = dpoi_idx0;
157  }
158  else
159  {
160  sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_TX];
161  vnet_hw_interface_t *hi1 =
162  vnet_get_sup_hw_interface (vnm, sw_if_index1);
163  t1 = &vxm->tunnels[hi1->dev_instance];
164  /* Note: change to always set next1 if it may set to drop */
165  next1 = t1->next_dpo.dpoi_next_node;
166  dpoi_idx1 = t1->next_dpo.dpoi_index;
167  }
168  }
169 
170  vnet_buffer(b0)->ip.adj_index[VLIB_TX] = dpoi_idx0;
171  vnet_buffer(b1)->ip.adj_index[VLIB_TX] = dpoi_idx1;
172 
173  ASSERT(t0->rewrite_header.data_bytes == underlay_hdr_len);
174  ASSERT(t1->rewrite_header.data_bytes == underlay_hdr_len);
175  vnet_rewrite_two_headers(*t0, *t1, vlib_buffer_get_current(b0), vlib_buffer_get_current(b1), underlay_hdr_len);
176 
177  vlib_buffer_advance (b0, -underlay_hdr_len);
178  vlib_buffer_advance (b1, -underlay_hdr_len);
179 
180  u32 len0 = vlib_buffer_length_in_chain (vm, b0);
181  u32 len1 = vlib_buffer_length_in_chain (vm, b1);
182  u16 payload_l0 = clib_host_to_net_u16 (len0 - l3_len);
183  u16 payload_l1 = clib_host_to_net_u16 (len1 - l3_len);
184 
185  void * underlay0 = vlib_buffer_get_current(b0);
186  void * underlay1 = vlib_buffer_get_current(b1);
187 
188  ip4_header_t * ip4_0, * ip4_1;
189  qos_bits_t ip4_0_tos = 0, ip4_1_tos = 0;
190  ip6_header_t * ip6_0, * ip6_1;
191  udp_header_t * udp0, * udp1;
192  u8 * l3_0, * l3_1;
193  if (is_ip4)
194  {
195  ip4_vxlan_header_t * hdr0 = underlay0;
196  ip4_vxlan_header_t * hdr1 = underlay1;
197 
198  /* Fix the IP4 checksum and length */
199  ip4_0 = &hdr0->ip4;
200  ip4_1 = &hdr1->ip4;
201  ip4_0->length = clib_host_to_net_u16 (len0);
202  ip4_1->length = clib_host_to_net_u16 (len1);
203 
204  if (PREDICT_FALSE (b0->flags & VNET_BUFFER_F_QOS_DATA_VALID))
205  {
206  ip4_0_tos = vnet_buffer2 (b0)->qos.bits;
207  ip4_0->tos = ip4_0_tos;
208  }
209  if (PREDICT_FALSE (b1->flags & VNET_BUFFER_F_QOS_DATA_VALID))
210  {
211  ip4_1_tos = vnet_buffer2 (b1)->qos.bits;
212  ip4_1->tos = ip4_1_tos;
213  }
214 
215  l3_0 = (u8 *)ip4_0;
216  l3_1 = (u8 *)ip4_1;
217  udp0 = &hdr0->udp;
218  udp1 = &hdr1->udp;
219  }
220  else /* ipv6 */
221  {
222  ip6_vxlan_header_t * hdr0 = underlay0;
223  ip6_vxlan_header_t * hdr1 = underlay1;
224 
225  /* Fix IP6 payload length */
226  ip6_0 = &hdr0->ip6;
227  ip6_1 = &hdr1->ip6;
228  ip6_0->payload_length = payload_l0;
229  ip6_1->payload_length = payload_l1;
230 
231  l3_0 = (u8 *)ip6_0;
232  l3_1 = (u8 *)ip6_1;
233  udp0 = &hdr0->udp;
234  udp1 = &hdr1->udp;
235  }
236 
237  /* Fix UDP length and set source port */
238  udp0->length = payload_l0;
239  udp0->src_port = flow_hash0;
240  udp1->length = payload_l1;
241  udp1->src_port = flow_hash1;
242 
243  if (csum_offload)
244  {
245  b0->flags |= csum_flags;
246  vnet_buffer (b0)->l3_hdr_offset = l3_0 - b0->data;
247  vnet_buffer (b0)->l4_hdr_offset = (u8 *) udp0 - b0->data;
248  b1->flags |= csum_flags;
249  vnet_buffer (b1)->l3_hdr_offset = l3_1 - b1->data;
250  vnet_buffer (b1)->l4_hdr_offset = (u8 *) udp1 - b1->data;
251  }
252  /* IPv4 UDP checksum only if checksum offload is used */
253  else if (is_ip4)
254  {
255  ip_csum_t sum0 = ip4_0->checksum;
256  sum0 = ip_csum_update (sum0, 0, ip4_0->length, ip4_header_t,
257  length /* changed member */);
258  if (PREDICT_FALSE (ip4_0_tos))
259  {
260  sum0 = ip_csum_update (sum0, 0, ip4_0_tos, ip4_header_t,
261  tos /* changed member */);
262  }
263  ip4_0->checksum = ip_csum_fold (sum0);
264  ip_csum_t sum1 = ip4_1->checksum;
265  sum1 = ip_csum_update (sum1, 0, ip4_1->length, ip4_header_t,
266  length /* changed member */);
267  if (PREDICT_FALSE (ip4_1_tos))
268  {
269  sum1 = ip_csum_update (sum1, 0, ip4_1_tos, ip4_header_t,
270  tos /* changed member */);
271  }
272  ip4_1->checksum = ip_csum_fold (sum1);
273  }
274  /* IPv6 UDP checksum is mandatory */
275  else
276  {
277  int bogus = 0;
278 
280  (vm, b0, ip6_0, &bogus);
281  ASSERT(bogus == 0);
282  if (udp0->checksum == 0)
283  udp0->checksum = 0xffff;
285  (vm, b1, ip6_1, &bogus);
286  ASSERT(bogus == 0);
287  if (udp1->checksum == 0)
288  udp1->checksum = 0xffff;
289  }
290 
291  if (sw_if_index0 == sw_if_index1)
292  {
293  vlib_increment_combined_counter (tx_counter, thread_index,
294  sw_if_index0, 2, len0 + len1);
295  }
296  else
297  {
298  vlib_increment_combined_counter (tx_counter, thread_index,
299  sw_if_index0, 1, len0);
300  vlib_increment_combined_counter (tx_counter, thread_index,
301  sw_if_index1, 1, len1);
302  }
303  pkts_encapsulated += 2;
304 
305  if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
306  {
307  vxlan_encap_trace_t *tr =
308  vlib_add_trace (vm, node, b0, sizeof (*tr));
309  tr->tunnel_index = t0 - vxm->tunnels;
310  tr->vni = t0->vni;
311  }
312 
313  if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
314  {
315  vxlan_encap_trace_t *tr =
316  vlib_add_trace (vm, node, b1, sizeof (*tr));
317  tr->tunnel_index = t1 - vxm->tunnels;
318  tr->vni = t1->vni;
319  }
320 
321  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
322  to_next, n_left_to_next,
323  bi0, bi1, next0, next1);
324  }
325 
326  while (n_left_from > 0 && n_left_to_next > 0)
327  {
328  u32 bi0 = to_next[0] = from[0];
329  from += 1;
330  to_next += 1;
331  n_left_from -= 1;
332  n_left_to_next -= 1;
333 
334  vlib_buffer_t * b0 = vlib_get_buffer (vm, bi0);
335  u32 flow_hash0 = vnet_l2_compute_flow_hash(b0);
336 
337  /* Get next node index and adj index from tunnel next_dpo */
338  if (sw_if_index0 != vnet_buffer(b0)->sw_if_index[VLIB_TX])
339  {
340  sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
341  vnet_hw_interface_t *hi0 =
342  vnet_get_sup_hw_interface (vnm, sw_if_index0);
343  t0 = &vxm->tunnels[hi0->dev_instance];
344  /* Note: change to always set next0 if it may be set to drop */
345  next0 = t0->next_dpo.dpoi_next_node;
346  dpoi_idx0 = t0->next_dpo.dpoi_index;
347  }
348  vnet_buffer(b0)->ip.adj_index[VLIB_TX] = dpoi_idx0;
349 
350  ASSERT(t0->rewrite_header.data_bytes == underlay_hdr_len);
351  vnet_rewrite_one_header(*t0, vlib_buffer_get_current(b0), underlay_hdr_len);
352 
353  vlib_buffer_advance (b0, -underlay_hdr_len);
354  void * underlay0 = vlib_buffer_get_current(b0);
355 
356  u32 len0 = vlib_buffer_length_in_chain (vm, b0);
357  u16 payload_l0 = clib_host_to_net_u16 (len0 - l3_len);
358 
359  udp_header_t * udp0;
360  ip4_header_t * ip4_0;
361  qos_bits_t ip4_0_tos = 0;
362  ip6_header_t * ip6_0;
363  u8 * l3_0;
364  if (is_ip4)
365  {
366  ip4_vxlan_header_t * hdr = underlay0;
367 
368  /* Fix the IP4 checksum and length */
369  ip4_0 = &hdr->ip4;
370  ip4_0->length = clib_host_to_net_u16 (len0);
371 
372  if (PREDICT_FALSE (b0->flags & VNET_BUFFER_F_QOS_DATA_VALID))
373  {
374  ip4_0_tos = vnet_buffer2 (b0)->qos.bits;
375  ip4_0->tos = ip4_0_tos;
376  }
377 
378  l3_0 = (u8*)ip4_0;
379  udp0 = &hdr->udp;
380  }
381  else /* ip6 path */
382  {
383  ip6_vxlan_header_t * hdr = underlay0;
384 
385  /* Fix IP6 payload length */
386  ip6_0 = &hdr->ip6;
387  ip6_0->payload_length = payload_l0;
388 
389  l3_0 = (u8 *)ip6_0;
390  udp0 = &hdr->udp;
391  }
392 
393  /* Fix UDP length and set source port */
394  udp0->length = payload_l0;
395  udp0->src_port = flow_hash0;
396 
397  if (csum_offload)
398  {
399  b0->flags |= csum_flags;
400  vnet_buffer (b0)->l3_hdr_offset = l3_0 - b0->data;
401  vnet_buffer (b0)->l4_hdr_offset = (u8 *) udp0 - b0->data;
402  }
403  /* IPv4 UDP checksum only if checksum offload is used */
404  else if (is_ip4)
405  {
406  ip_csum_t sum0 = ip4_0->checksum;
407  sum0 = ip_csum_update (sum0, 0, ip4_0->length, ip4_header_t,
408  length /* changed member */);
409  if (PREDICT_FALSE (ip4_0_tos))
410  {
411  sum0 = ip_csum_update (sum0, 0, ip4_0_tos, ip4_header_t,
412  tos /* changed member */);
413  }
414  ip4_0->checksum = ip_csum_fold (sum0);
415  }
416  /* IPv6 UDP checksum is mandatory */
417  else
418  {
419  int bogus = 0;
420 
422  (vm, b0, ip6_0, &bogus);
423  ASSERT(bogus == 0);
424  if (udp0->checksum == 0)
425  udp0->checksum = 0xffff;
426  }
427 
428  vlib_increment_combined_counter (tx_counter, thread_index,
429  sw_if_index0, 1, len0);
430  pkts_encapsulated ++;
431 
432  if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
433  {
434  vxlan_encap_trace_t *tr =
435  vlib_add_trace (vm, node, b0, sizeof (*tr));
436  tr->tunnel_index = t0 - vxm->tunnels;
437  tr->vni = t0->vni;
438  }
439  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
440  to_next, n_left_to_next,
441  bi0, next0);
442  }
443 
444  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
445  }
446 
447  /* Do we still need this now that tunnel tx stats is kept? */
449  VXLAN_ENCAP_ERROR_ENCAPSULATED,
450  pkts_encapsulated);
451 
452  return from_frame->n_vectors;
453 }
454 
456  vlib_node_runtime_t * node,
457  vlib_frame_t * from_frame)
458 {
459  /* Disable chksum offload as setup overhead in tx node is not worthwhile
460  for ip4 header checksum only, unless udp checksum is also required */
461  return vxlan_encap_inline (vm, node, from_frame, /* is_ip4 */ 1,
462  /* csum_offload */ 0);
463 }
464 
466  vlib_node_runtime_t * node,
467  vlib_frame_t * from_frame)
468 {
469  /* Enable checksum offload for ip6 as udp checksum is mandatory, */
470  return vxlan_encap_inline (vm, node, from_frame, /* is_ip4 */ 0,
471  /* csum_offload */ 1);
472 }
473 
475  .name = "vxlan4-encap",
476  .vector_size = sizeof (u32),
477  .format_trace = format_vxlan_encap_trace,
478  .type = VLIB_NODE_TYPE_INTERNAL,
480  .error_strings = vxlan_encap_error_strings,
481  .n_next_nodes = VXLAN_ENCAP_N_NEXT,
482  .next_nodes = {
483  [VXLAN_ENCAP_NEXT_DROP] = "error-drop",
484  },
485 };
486 
488  .name = "vxlan6-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 
u32 sw_if_index
Definition: ipsec_gre.api:37
#define vnet_rewrite_one_header(rw0, p0, most_likely_size)
Definition: rewrite.h:199
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
#define CLIB_UNUSED(x)
Definition: clib.h:82
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:220
static vnet_hw_interface_t * vnet_get_sup_hw_interface(vnet_main_t *vnm, u32 sw_if_index)
#define vnet_buffer2(b)
Definition: buffer.h:428
vnet_interface_main_t interface_main
Definition: vnet.h:56
#define foreach_vxlan_encap_error
Definition: encap.c:26
vxlan_encap_error_t
Definition: encap.c:35
#define NULL
Definition: clib.h:58
u8 data[0]
Packet data.
Definition: buffer.h:181
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:181
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
#define VLIB_NODE_FN(node)
Definition: node.h:201
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
unsigned char u8
Definition: types.h:56
vnet_main_t * vnet_main
Definition: vxlan.h:181
static char * vxlan_encap_error_strings[]
Definition: encap.c:29
#define always_inline
Definition: clib.h:98
vlib_combined_counter_main_t * combined_sw_if_counters
Definition: interface.h:824
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:203
unsigned int u32
Definition: types.h:88
unsigned short u16
Definition: types.h:57
static u32 vnet_l2_compute_flow_hash(vlib_buffer_t *b)
Definition: l2_input.h:266
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:229
vxlan_main_t vxlan_main
Definition: vxlan.c:43
#define PREDICT_FALSE(x)
Definition: clib.h:111
u32 node_index
Node index.
Definition: node.h:494
#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:338
u8 * format_vxlan_encap_trace(u8 *s, va_list *args)
Definition: encap.c:53
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1150
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
u16 n_vectors
Definition: node.h:395
static_always_inline uword vlib_get_thread_index(void)
Definition: threads.h:212
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:80
vlib_main_t * vm
Definition: buffer.c:312
#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:458
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:947
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:513
#define ASSERT(truth)
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:248
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:57
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:67
Definition: defs.h:47
u16 payload_length
Definition: ip6_packet.h:376
index_t dpoi_index
the index of objects of that type
Definition: dpo.h:184
#define INDEX_INVALID
Invalid index - used when no index is known blazoned capitals INVALID speak volumes where ~0 does not...
Definition: dpo.h:47
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
#define ip_csum_update(sum, old, new, type, field)
Definition: ip_packet.h:231
A collection of combined counters.
Definition: counter.h:188
vxlan_encap_next_t
Definition: encap.c:42
#define vnet_buffer(b)
Definition: buffer.h:369
vlib_node_registration_t vxlan4_encap_node
(constructor) VLIB_REGISTER_NODE (vxlan4_encap_node)
Definition: encap.c:474
vlib_node_registration_t vxlan6_encap_node
(constructor) VLIB_REGISTER_NODE (vxlan6_encap_node)
Definition: encap.c:487
dpo_id_t next_dpo
Definition: vxlan.h:86
u16 dpoi_next_node
The next VLIB node to follow.
Definition: dpo.h:180
#define vnet_rewrite_two_headers(rw0, rw1, p0, p1, most_likely_size)
Definition: rewrite.h:204
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
#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:85
vxlan_tunnel_t * tunnels
Definition: vxlan.h:158
u8 qos_bits_t
Type, er, safety for us water based entities.
Definition: qos_types.h:68
static u16 ip_csum_fold(ip_csum_t c)
Definition: ip_packet.h:237