FD.io VPP  v20.05-21-gb1500e9ff
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 
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;
85  vlib_buffer_t **b = bufs;
86 
87  from = vlib_frame_vector_args (from_frame);
88  n_left_from = from_frame->n_vectors;
89 
90  next_index = node->cached_next_index;
91 
92  STATIC_ASSERT_SIZEOF(ip6_vxlan_header_t, 56);
93  STATIC_ASSERT_SIZEOF(ip4_vxlan_header_t, 36);
94 
95  u8 const underlay_hdr_len = is_ip4 ?
96  sizeof(ip4_vxlan_header_t) : sizeof(ip6_vxlan_header_t);
97  u16 const l3_len = is_ip4 ? sizeof(ip4_header_t) : sizeof(ip6_header_t);
98  u32 const csum_flags = is_ip4 ? VNET_BUFFER_F_OFFLOAD_IP_CKSUM |
99  VNET_BUFFER_F_IS_IP4 | VNET_BUFFER_F_OFFLOAD_UDP_CKSUM :
100  VNET_BUFFER_F_IS_IP6 | VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
101  vlib_get_buffers (vm, from, bufs, n_left_from);
102 
103  while (n_left_from > 0)
104  {
105  u32 n_left_to_next;
106 
107  vlib_get_next_frame (vm, node, next_index,
108  to_next, n_left_to_next);
109 
110  while (n_left_from >= 4 && n_left_to_next >= 2)
111  {
112  /* Prefetch next iteration. */
113  {
114  vlib_prefetch_buffer_header (b[2], LOAD);
115  vlib_prefetch_buffer_header (b[3], LOAD);
116 
119  }
120 
121  u32 bi0 = to_next[0] = from[0];
122  u32 bi1 = to_next[1] = from[1];
123  from += 2;
124  to_next += 2;
125  n_left_to_next -= 2;
126  n_left_from -= 2;
127 
128  vlib_buffer_t * b0 = b[0];
129  vlib_buffer_t * b1 = b[1];
130  b += 2;
131 
132  u32 flow_hash0 = vnet_l2_compute_flow_hash (b0);
133  u32 flow_hash1 = vnet_l2_compute_flow_hash (b1);
134 
135  /* Get next node index and adj index from tunnel next_dpo */
136  if (sw_if_index0 != vnet_buffer(b0)->sw_if_index[VLIB_TX])
137  {
138  sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
139  vnet_hw_interface_t *hi0 =
140  vnet_get_sup_hw_interface (vnm, sw_if_index0);
141  t0 = &vxm->tunnels[hi0->dev_instance];
142  /* Note: change to always set next0 if it may set to drop */
143  next0 = t0->next_dpo.dpoi_next_node;
144  dpoi_idx0 = t0->next_dpo.dpoi_index;
145  }
146 
147  /* Get next node index and adj index from tunnel next_dpo */
148  if (sw_if_index1 != vnet_buffer(b1)->sw_if_index[VLIB_TX])
149  {
150  if (sw_if_index0 == vnet_buffer(b1)->sw_if_index[VLIB_TX])
151  {
152  sw_if_index1 = sw_if_index0;
153  t1 = t0;
154  next1 = next0;
155  dpoi_idx1 = dpoi_idx0;
156  }
157  else
158  {
159  sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_TX];
160  vnet_hw_interface_t *hi1 =
161  vnet_get_sup_hw_interface (vnm, sw_if_index1);
162  t1 = &vxm->tunnels[hi1->dev_instance];
163  /* Note: change to always set next1 if it may set to drop */
164  next1 = t1->next_dpo.dpoi_next_node;
165  dpoi_idx1 = t1->next_dpo.dpoi_index;
166  }
167  }
168 
169  vnet_buffer(b0)->ip.adj_index[VLIB_TX] = dpoi_idx0;
170  vnet_buffer(b1)->ip.adj_index[VLIB_TX] = dpoi_idx1;
171 
172  ASSERT(t0->rewrite_header.data_bytes == underlay_hdr_len);
173  ASSERT(t1->rewrite_header.data_bytes == underlay_hdr_len);
174  vnet_rewrite_two_headers(*t0, *t1, vlib_buffer_get_current(b0), vlib_buffer_get_current(b1), underlay_hdr_len);
175 
176  vlib_buffer_advance (b0, -underlay_hdr_len);
177  vlib_buffer_advance (b1, -underlay_hdr_len);
178 
179  u32 len0 = vlib_buffer_length_in_chain (vm, b0);
180  u32 len1 = vlib_buffer_length_in_chain (vm, b1);
181  u16 payload_l0 = clib_host_to_net_u16 (len0 - l3_len);
182  u16 payload_l1 = clib_host_to_net_u16 (len1 - l3_len);
183 
184  void * underlay0 = vlib_buffer_get_current(b0);
185  void * underlay1 = vlib_buffer_get_current(b1);
186 
187  ip4_header_t * ip4_0, * ip4_1;
188  qos_bits_t ip4_0_tos = 0, ip4_1_tos = 0;
189  ip6_header_t * ip6_0, * ip6_1;
190  udp_header_t * udp0, * udp1;
191  u8 * l3_0, * l3_1;
192  if (is_ip4)
193  {
194  ip4_vxlan_header_t * hdr0 = underlay0;
195  ip4_vxlan_header_t * hdr1 = underlay1;
196 
197  /* Fix the IP4 checksum and length */
198  ip4_0 = &hdr0->ip4;
199  ip4_1 = &hdr1->ip4;
200  ip4_0->length = clib_host_to_net_u16 (len0);
201  ip4_1->length = clib_host_to_net_u16 (len1);
202 
203  if (PREDICT_FALSE (b0->flags & VNET_BUFFER_F_QOS_DATA_VALID))
204  {
205  ip4_0_tos = vnet_buffer2 (b0)->qos.bits;
206  ip4_0->tos = ip4_0_tos;
207  }
208  if (PREDICT_FALSE (b1->flags & VNET_BUFFER_F_QOS_DATA_VALID))
209  {
210  ip4_1_tos = vnet_buffer2 (b1)->qos.bits;
211  ip4_1->tos = ip4_1_tos;
212  }
213 
214  l3_0 = (u8 *)ip4_0;
215  l3_1 = (u8 *)ip4_1;
216  udp0 = &hdr0->udp;
217  udp1 = &hdr1->udp;
218  }
219  else /* ipv6 */
220  {
221  ip6_vxlan_header_t * hdr0 = underlay0;
222  ip6_vxlan_header_t * hdr1 = underlay1;
223 
224  /* Fix IP6 payload length */
225  ip6_0 = &hdr0->ip6;
226  ip6_1 = &hdr1->ip6;
227  ip6_0->payload_length = payload_l0;
228  ip6_1->payload_length = payload_l1;
229 
230  l3_0 = (u8 *)ip6_0;
231  l3_1 = (u8 *)ip6_1;
232  udp0 = &hdr0->udp;
233  udp1 = &hdr1->udp;
234  }
235 
236  /* Fix UDP length and set source port */
237  udp0->length = payload_l0;
238  udp0->src_port = flow_hash0;
239  udp1->length = payload_l1;
240  udp1->src_port = flow_hash1;
241 
242  if (csum_offload)
243  {
244  b0->flags |= csum_flags;
245  vnet_buffer (b0)->l3_hdr_offset = l3_0 - b0->data;
246  vnet_buffer (b0)->l4_hdr_offset = (u8 *) udp0 - b0->data;
247  b1->flags |= csum_flags;
248  vnet_buffer (b1)->l3_hdr_offset = l3_1 - b1->data;
249  vnet_buffer (b1)->l4_hdr_offset = (u8 *) udp1 - b1->data;
250  }
251  /* IPv4 UDP checksum only if checksum offload is used */
252  else if (is_ip4)
253  {
254  ip_csum_t sum0 = ip4_0->checksum;
255  sum0 = ip_csum_update (sum0, 0, ip4_0->length, ip4_header_t,
256  length /* changed member */);
257  if (PREDICT_FALSE (ip4_0_tos))
258  {
259  sum0 = ip_csum_update (sum0, 0, ip4_0_tos, ip4_header_t,
260  tos /* changed member */);
261  }
262  ip4_0->checksum = ip_csum_fold (sum0);
263  ip_csum_t sum1 = ip4_1->checksum;
264  sum1 = ip_csum_update (sum1, 0, ip4_1->length, ip4_header_t,
265  length /* changed member */);
266  if (PREDICT_FALSE (ip4_1_tos))
267  {
268  sum1 = ip_csum_update (sum1, 0, ip4_1_tos, ip4_header_t,
269  tos /* changed member */);
270  }
271  ip4_1->checksum = ip_csum_fold (sum1);
272  }
273  /* IPv6 UDP checksum is mandatory */
274  else
275  {
276  int bogus = 0;
277 
279  (vm, b0, ip6_0, &bogus);
280  ASSERT(bogus == 0);
281  if (udp0->checksum == 0)
282  udp0->checksum = 0xffff;
284  (vm, b1, ip6_1, &bogus);
285  ASSERT(bogus == 0);
286  if (udp1->checksum == 0)
287  udp1->checksum = 0xffff;
288  }
289 
290  /* save inner packet flow_hash for load-balance node */
291  vnet_buffer (b0)->ip.flow_hash = flow_hash0;
292  vnet_buffer (b1)->ip.flow_hash = flow_hash1;
293 
294  if (sw_if_index0 == sw_if_index1)
295  {
296  vlib_increment_combined_counter (tx_counter, thread_index,
297  sw_if_index0, 2, len0 + len1);
298  }
299  else
300  {
301  vlib_increment_combined_counter (tx_counter, thread_index,
302  sw_if_index0, 1, len0);
303  vlib_increment_combined_counter (tx_counter, thread_index,
304  sw_if_index1, 1, len1);
305  }
306  pkts_encapsulated += 2;
307 
308  if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
309  {
310  vxlan_encap_trace_t *tr =
311  vlib_add_trace (vm, node, b0, sizeof (*tr));
312  tr->tunnel_index = t0 - vxm->tunnels;
313  tr->vni = t0->vni;
314  }
315 
316  if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
317  {
318  vxlan_encap_trace_t *tr =
319  vlib_add_trace (vm, node, b1, sizeof (*tr));
320  tr->tunnel_index = t1 - vxm->tunnels;
321  tr->vni = t1->vni;
322  }
323 
324  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
325  to_next, n_left_to_next,
326  bi0, bi1, next0, next1);
327  }
328 
329  while (n_left_from > 0 && n_left_to_next > 0)
330  {
331  u32 bi0 = to_next[0] = from[0];
332  from += 1;
333  to_next += 1;
334  n_left_from -= 1;
335  n_left_to_next -= 1;
336 
337  vlib_buffer_t * b0 = b[0];
338  b += 1;
339 
340  u32 flow_hash0 = vnet_l2_compute_flow_hash(b0);
341 
342  /* Get next node index and adj index from tunnel next_dpo */
343  if (sw_if_index0 != vnet_buffer(b0)->sw_if_index[VLIB_TX])
344  {
345  sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
346  vnet_hw_interface_t *hi0 =
347  vnet_get_sup_hw_interface (vnm, sw_if_index0);
348  t0 = &vxm->tunnels[hi0->dev_instance];
349  /* Note: change to always set next0 if it may be set to drop */
350  next0 = t0->next_dpo.dpoi_next_node;
351  dpoi_idx0 = t0->next_dpo.dpoi_index;
352  }
353  vnet_buffer(b0)->ip.adj_index[VLIB_TX] = dpoi_idx0;
354 
355  ASSERT(t0->rewrite_header.data_bytes == underlay_hdr_len);
356  vnet_rewrite_one_header(*t0, vlib_buffer_get_current(b0), underlay_hdr_len);
357 
358  vlib_buffer_advance (b0, -underlay_hdr_len);
359  void * underlay0 = vlib_buffer_get_current(b0);
360 
361  u32 len0 = vlib_buffer_length_in_chain (vm, b0);
362  u16 payload_l0 = clib_host_to_net_u16 (len0 - l3_len);
363 
364  udp_header_t * udp0;
365  ip4_header_t * ip4_0;
366  qos_bits_t ip4_0_tos = 0;
367  ip6_header_t * ip6_0;
368  u8 * l3_0;
369  if (is_ip4)
370  {
371  ip4_vxlan_header_t * hdr = underlay0;
372 
373  /* Fix the IP4 checksum and length */
374  ip4_0 = &hdr->ip4;
375  ip4_0->length = clib_host_to_net_u16 (len0);
376 
377  if (PREDICT_FALSE (b0->flags & VNET_BUFFER_F_QOS_DATA_VALID))
378  {
379  ip4_0_tos = vnet_buffer2 (b0)->qos.bits;
380  ip4_0->tos = ip4_0_tos;
381  }
382 
383  l3_0 = (u8*)ip4_0;
384  udp0 = &hdr->udp;
385  }
386  else /* ip6 path */
387  {
388  ip6_vxlan_header_t * hdr = underlay0;
389 
390  /* Fix IP6 payload length */
391  ip6_0 = &hdr->ip6;
392  ip6_0->payload_length = payload_l0;
393 
394  l3_0 = (u8 *)ip6_0;
395  udp0 = &hdr->udp;
396  }
397 
398  /* Fix UDP length and set source port */
399  udp0->length = payload_l0;
400  udp0->src_port = flow_hash0;
401 
402  if (csum_offload)
403  {
404  b0->flags |= csum_flags;
405  vnet_buffer (b0)->l3_hdr_offset = l3_0 - b0->data;
406  vnet_buffer (b0)->l4_hdr_offset = (u8 *) udp0 - b0->data;
407  }
408  /* IPv4 UDP checksum only if checksum offload is used */
409  else if (is_ip4)
410  {
411  ip_csum_t sum0 = ip4_0->checksum;
412  sum0 = ip_csum_update (sum0, 0, ip4_0->length, ip4_header_t,
413  length /* changed member */);
414  if (PREDICT_FALSE (ip4_0_tos))
415  {
416  sum0 = ip_csum_update (sum0, 0, ip4_0_tos, ip4_header_t,
417  tos /* changed member */);
418  }
419  ip4_0->checksum = ip_csum_fold (sum0);
420  }
421  /* IPv6 UDP checksum is mandatory */
422  else
423  {
424  int bogus = 0;
425 
427  (vm, b0, ip6_0, &bogus);
428  ASSERT(bogus == 0);
429  if (udp0->checksum == 0)
430  udp0->checksum = 0xffff;
431  }
432 
433  /* reuse inner packet flow_hash for load-balance node */
434  vnet_buffer (b0)->ip.flow_hash = flow_hash0;
435 
436  vlib_increment_combined_counter (tx_counter, thread_index,
437  sw_if_index0, 1, len0);
438  pkts_encapsulated ++;
439 
440  if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
441  {
442  vxlan_encap_trace_t *tr =
443  vlib_add_trace (vm, node, b0, sizeof (*tr));
444  tr->tunnel_index = t0 - vxm->tunnels;
445  tr->vni = t0->vni;
446  }
447  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
448  to_next, n_left_to_next,
449  bi0, next0);
450  }
451 
452  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
453  }
454 
455  /* Do we still need this now that tunnel tx stats is kept? */
457  VXLAN_ENCAP_ERROR_ENCAPSULATED,
458  pkts_encapsulated);
459 
460  return from_frame->n_vectors;
461 }
462 
465  vlib_frame_t * from_frame)
466 {
467  /* Disable chksum offload as setup overhead in tx node is not worthwhile
468  for ip4 header checksum only, unless udp checksum is also required */
469  return vxlan_encap_inline (vm, node, from_frame, /* is_ip4 */ 1,
470  /* csum_offload */ 0);
471 }
472 
475  vlib_frame_t * from_frame)
476 {
477  /* Enable checksum offload for ip6 as udp checksum is mandatory, */
478  return vxlan_encap_inline (vm, node, from_frame, /* is_ip4 */ 0,
479  /* csum_offload */ 1);
480 }
481 
483  .name = "vxlan4-encap",
484  .vector_size = sizeof (u32),
485  .format_trace = format_vxlan_encap_trace,
488  .error_strings = vxlan_encap_error_strings,
489  .n_next_nodes = VXLAN_ENCAP_N_NEXT,
490  .next_nodes = {
491  [VXLAN_ENCAP_NEXT_DROP] = "error-drop",
492  },
493 };
494 
496  .name = "vxlan6-encap",
497  .vector_size = sizeof (u32),
498  .format_trace = format_vxlan_encap_trace,
501  .error_strings = vxlan_encap_error_strings,
502  .n_next_nodes = VXLAN_ENCAP_N_NEXT,
503  .next_nodes = {
504  [VXLAN_ENCAP_NEXT_DROP] = "error-drop",
505  },
506 };
507 
#define vnet_rewrite_one_header(rw0, p0, most_likely_size)
Definition: rewrite.h:211
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:86
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:482
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
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:244
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
#define VLIB_NODE_FN(node)
Definition: node.h:202
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
unsigned char u8
Definition: types.h:56
vnet_main_t * vnet_main
Definition: vxlan.h:181
vl_api_interface_index_t sw_if_index
Definition: gre.api:53
static char * vxlan_encap_error_strings[]
Definition: encap.c:29
vlib_combined_counter_main_t * combined_sw_if_counters
Definition: interface.h:867
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:203
unsigned int u32
Definition: types.h:88
#define VLIB_FRAME_SIZE
Definition: node.h:380
vl_api_fib_path_type_t type
Definition: fib_types.api:123
unsigned short u16
Definition: types.h:57
static u32 vnet_l2_compute_flow_hash(vlib_buffer_t *b)
Definition: l2_input.h:276
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:44
#define PREDICT_FALSE(x)
Definition: clib.h:118
#define always_inline
Definition: ipsec.h:28
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
vlib_main_t * vm
Definition: in2out_ed.c:1599
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:399
static_always_inline uword vlib_get_thread_index(void)
Definition: threads.h:218
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:80
u8 data[]
Packet data.
Definition: buffer.h:181
#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
vlib_main_t vlib_node_runtime_t * node
Definition: in2out_ed.c:1599
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:1095
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:517
#define ASSERT(truth)
u8 data[128]
Definition: ipsec_types.api:89
ip_dscp_t tos
Definition: ip4_packet.h:141
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: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:67
Definition: defs.h:47
u16 payload_length
Definition: ip6_packet.h:301
index_t dpoi_index
the index of objects of that type
Definition: dpo.h:186
#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:294
A collection of combined counters.
Definition: counter.h:188
vxlan_encap_next_t
Definition: encap.c:42
#define vnet_buffer(b)
Definition: buffer.h:417
vlib_node_registration_t vxlan4_encap_node
(constructor) VLIB_REGISTER_NODE (vxlan4_encap_node)
Definition: encap.c:482
vlib_node_registration_t vxlan6_encap_node
(constructor) VLIB_REGISTER_NODE (vxlan6_encap_node)
Definition: encap.c:495
dpo_id_t next_dpo
Definition: vxlan.h:87
u16 dpoi_next_node
The next VLIB node to follow.
Definition: dpo.h:182
static_always_inline void vlib_get_buffers(vlib_main_t *vm, u32 *bi, vlib_buffer_t **b, int count)
Translate array of buffer indices into buffer pointers.
Definition: buffer_funcs.h:280
#define vnet_rewrite_two_headers(rw0, rw1, p0, p1, most_likely_size)
Definition: rewrite.h:215
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
#define STATIC_ASSERT_SIZEOF(d, s)
vxlan_tunnel_t * tunnels
Definition: vxlan.h:159
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:300