FD.io VPP  v17.01-9-ge7dcee4
Vector Packet Processing
node.c
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1 /*
2  * node.c: gre packet processing
3  *
4  * Copyright (c) 2012 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 
18 #include <vlib/vlib.h>
19 #include <vnet/pg/pg.h>
20 #include <vnet/gre/gre.h>
21 #include <vnet/mpls/mpls.h>
22 #include <vppinfra/sparse_vec.h>
23 
24 #define foreach_gre_input_next \
25 _(PUNT, "error-punt") \
26 _(DROP, "error-drop") \
27 _(ETHERNET_INPUT, "ethernet-input") \
28 _(IP4_INPUT, "ip4-input") \
29 _(IP6_INPUT, "ip6-input") \
30 _(MPLS_INPUT, "mpls-input")
31 
32 typedef enum {
33 #define _(s,n) GRE_INPUT_NEXT_##s,
35 #undef _
38 
39 typedef struct {
45 
46 u8 * format_gre_rx_trace (u8 * s, va_list * args)
47 {
48  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
49  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
50  gre_rx_trace_t * t = va_arg (*args, gre_rx_trace_t *);
51 
52  s = format (s, "GRE: tunnel %d len %d src %U dst %U",
53  t->tunnel_id, clib_net_to_host_u16(t->length),
56  return s;
57 }
58 
59 typedef struct {
60  /* Sparse vector mapping gre protocol in network byte order
61  to next index. */
64 
65 static uword
67  vlib_node_runtime_t * node,
68  vlib_frame_t * from_frame)
69 {
70  gre_main_t * gm = &gre_main;
71  gre_input_runtime_t * rt = (void *) node->runtime_data;
72  __attribute__((unused)) u32 n_left_from, next_index, * from, * to_next;
73  u64 cached_tunnel_key = (u64) ~0;
74  u32 cached_tunnel_sw_if_index = 0, tunnel_sw_if_index = 0;
75 
76  u32 cpu_index = os_get_cpu_number();
77  u32 len;
79 
80  from = vlib_frame_vector_args (from_frame);
81  n_left_from = from_frame->n_vectors;
82 
83  next_index = node->cached_next_index;
84 
85  while (n_left_from > 0)
86  {
87  u32 n_left_to_next;
88 
89  vlib_get_next_frame (vm, node, next_index,
90  to_next, n_left_to_next);
91 
92  while (n_left_from >= 4 && n_left_to_next >= 2)
93  {
94  u32 bi0, bi1;
95  vlib_buffer_t * b0, * b1;
96  gre_header_t * h0, * h1;
97  u16 version0, version1;
98  int verr0, verr1;
99  u32 i0, i1, next0, next1, protocol0, protocol1;
100  ip4_header_t *ip0, *ip1;
101 
102  /* Prefetch next iteration. */
103  {
104  vlib_buffer_t * p2, * p3;
105 
106  p2 = vlib_get_buffer (vm, from[2]);
107  p3 = vlib_get_buffer (vm, from[3]);
108 
109  vlib_prefetch_buffer_header (p2, LOAD);
110  vlib_prefetch_buffer_header (p3, LOAD);
111 
112  CLIB_PREFETCH (p2->data, sizeof (h0[0]), LOAD);
113  CLIB_PREFETCH (p3->data, sizeof (h1[0]), LOAD);
114  }
115 
116  bi0 = from[0];
117  bi1 = from[1];
118  to_next[0] = bi0;
119  to_next[1] = bi1;
120  from += 2;
121  to_next += 2;
122  n_left_to_next -= 2;
123  n_left_from -= 2;
124 
125  b0 = vlib_get_buffer (vm, bi0);
126  b1 = vlib_get_buffer (vm, bi1);
127 
128  /* ip4_local hands us the ip header, not the gre header */
129  ip0 = vlib_buffer_get_current (b0);
130  ip1 = vlib_buffer_get_current (b1);
131 
132  /* Save src + dst ip4 address, e.g. for mpls-o-gre */
133  vnet_buffer(b0)->gre.src = ip0->src_address.as_u32;
134  vnet_buffer(b0)->gre.dst = ip0->dst_address.as_u32;
135  vnet_buffer(b1)->gre.src = ip1->src_address.as_u32;
136  vnet_buffer(b1)->gre.dst = ip1->dst_address.as_u32;
137 
138  vlib_buffer_advance (b0, sizeof (*ip0));
139  vlib_buffer_advance (b1, sizeof (*ip1));
140 
141  h0 = vlib_buffer_get_current (b0);
142  h1 = vlib_buffer_get_current (b1);
143 
144  /* Index sparse array with network byte order. */
145  protocol0 = h0->protocol;
146  protocol1 = h1->protocol;
147  sparse_vec_index2 (rt->next_by_protocol, protocol0, protocol1,
148  &i0, &i1);
149  next0 = vec_elt(rt->next_by_protocol, i0);
150  next1 = vec_elt(rt->next_by_protocol, i1);
151 
152  b0->error = node->errors[i0 == SPARSE_VEC_INVALID_INDEX ? GRE_ERROR_UNKNOWN_PROTOCOL : GRE_ERROR_NONE];
153  b1->error = node->errors[i1 == SPARSE_VEC_INVALID_INDEX ? GRE_ERROR_UNKNOWN_PROTOCOL : GRE_ERROR_NONE];
154 
155  version0 = clib_net_to_host_u16 (h0->flags_and_version);
156  verr0 = version0 & GRE_VERSION_MASK;
157  version1 = clib_net_to_host_u16 (h1->flags_and_version);
158  verr1 = version1 & GRE_VERSION_MASK;
159 
160  b0->error = verr0 ? node->errors[GRE_ERROR_UNSUPPORTED_VERSION]
161  : b0->error;
162  next0 = verr0 ? GRE_INPUT_NEXT_DROP : next0;
163  b1->error = verr1 ? node->errors[GRE_ERROR_UNSUPPORTED_VERSION]
164  : b1->error;
165  next1 = verr1 ? GRE_INPUT_NEXT_DROP : next1;
166 
167 
168  /* RPF check for ip4/ip6 input */
169  if (PREDICT_TRUE(next0 == GRE_INPUT_NEXT_IP4_INPUT
170  || next0 == GRE_INPUT_NEXT_IP6_INPUT
171  || next0 == GRE_INPUT_NEXT_ETHERNET_INPUT
172  || next0 == GRE_INPUT_NEXT_MPLS_INPUT))
173  {
174  u64 key = ((u64)(vnet_buffer(b0)->gre.dst) << 32) |
175  (u64)(vnet_buffer(b0)->gre.src);
176 
177  if (cached_tunnel_key != key)
178  {
180  gre_tunnel_t * t;
181  uword * p;
182 
183  p = hash_get (gm->tunnel_by_key, key);
184  if (!p)
185  {
186  next0 = GRE_INPUT_NEXT_DROP;
187  b0->error = node->errors[GRE_ERROR_NO_SUCH_TUNNEL];
188  goto drop0;
189  }
190  t = pool_elt_at_index (gm->tunnels, p[0]);
192  t->hw_if_index);
193  tunnel_sw_if_index = hi->sw_if_index;
194 
195  cached_tunnel_sw_if_index = tunnel_sw_if_index;
196  }
197  else
198  {
199  tunnel_sw_if_index = cached_tunnel_sw_if_index;
200  }
201  }
202  else
203  {
204  next0 = GRE_INPUT_NEXT_DROP;
205  goto drop0;
206  }
207  len = vlib_buffer_length_in_chain (vm, b0);
210  cpu_index,
211  tunnel_sw_if_index,
212  1 /* packets */,
213  len /* bytes */);
214 
215  vnet_buffer(b0)->sw_if_index[VLIB_RX] = tunnel_sw_if_index;
216 
217 drop0:
218  if (PREDICT_TRUE(next1 == GRE_INPUT_NEXT_IP4_INPUT
219  || next1 == GRE_INPUT_NEXT_IP6_INPUT
220  || next1 == GRE_INPUT_NEXT_ETHERNET_INPUT
221  || next1 == GRE_INPUT_NEXT_MPLS_INPUT))
222  {
223  u64 key = ((u64)(vnet_buffer(b1)->gre.dst) << 32) |
224  (u64)(vnet_buffer(b1)->gre.src);
225 
226  if (cached_tunnel_key != key)
227  {
229  gre_tunnel_t * t;
230  uword * p;
231 
232  p = hash_get (gm->tunnel_by_key, key);
233  if (!p)
234  {
235  next1 = GRE_INPUT_NEXT_DROP;
236  b1->error = node->errors[GRE_ERROR_NO_SUCH_TUNNEL];
237  goto drop1;
238  }
239  t = pool_elt_at_index (gm->tunnels, p[0]);
241  t->hw_if_index);
242  tunnel_sw_if_index = hi->sw_if_index;
243 
244  cached_tunnel_sw_if_index = tunnel_sw_if_index;
245  }
246  else
247  {
248  tunnel_sw_if_index = cached_tunnel_sw_if_index;
249  }
250  }
251  else
252  {
253  next1 = GRE_INPUT_NEXT_DROP;
254  goto drop1;
255  }
256  len = vlib_buffer_length_in_chain (vm, b1);
259  cpu_index,
260  tunnel_sw_if_index,
261  1 /* packets */,
262  len /* bytes */);
263 
264  vnet_buffer(b1)->sw_if_index[VLIB_RX] = tunnel_sw_if_index;
265 
266 drop1:
268  {
269  gre_rx_trace_t *tr = vlib_add_trace (vm, node,
270  b0, sizeof (*tr));
271  tr->tunnel_id = tunnel_sw_if_index;
272  tr->length = ip0->length;
273  tr->src.as_u32 = ip0->src_address.as_u32;
274  tr->dst.as_u32 = ip0->dst_address.as_u32;
275  }
276 
278  {
279  gre_rx_trace_t *tr = vlib_add_trace (vm, node,
280  b1, sizeof (*tr));
281  tr->tunnel_id = tunnel_sw_if_index;
282  tr->length = ip1->length;
283  tr->src.as_u32 = ip1->src_address.as_u32;
284  tr->dst.as_u32 = ip1->dst_address.as_u32;
285  }
286 
287  vlib_buffer_advance (b0, sizeof (*h0));
288  vlib_buffer_advance (b1, sizeof (*h1));
289 
290  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
291  to_next, n_left_to_next,
292  bi0, bi1, next0, next1);
293  }
294 
295  while (n_left_from > 0 && n_left_to_next > 0)
296  {
297  u32 bi0;
298  vlib_buffer_t * b0;
299  gre_header_t * h0;
300  ip4_header_t * ip0;
301  u16 version0;
302  int verr0;
303  u32 i0, next0;
304 
305  bi0 = from[0];
306  to_next[0] = bi0;
307  from += 1;
308  to_next += 1;
309  n_left_from -= 1;
310  n_left_to_next -= 1;
311 
312  b0 = vlib_get_buffer (vm, bi0);
313  ip0 = vlib_buffer_get_current (b0);
314 
315  vnet_buffer(b0)->gre.src = ip0->src_address.as_u32;
316  vnet_buffer(b0)->gre.dst = ip0->dst_address.as_u32;
317 
318  vlib_buffer_advance (b0, sizeof (*ip0));
319 
320  h0 = vlib_buffer_get_current (b0);
321 
323  next0 = vec_elt(rt->next_by_protocol, i0);
324 
325  b0->error =
326  node->errors[i0 == SPARSE_VEC_INVALID_INDEX
327  ? GRE_ERROR_UNKNOWN_PROTOCOL : GRE_ERROR_NONE];
328 
329  version0 = clib_net_to_host_u16 (h0->flags_and_version);
330  verr0 = version0 & GRE_VERSION_MASK;
331  b0->error = verr0 ? node->errors[GRE_ERROR_UNSUPPORTED_VERSION]
332  : b0->error;
333  next0 = verr0 ? GRE_INPUT_NEXT_DROP : next0;
334 
335 
336  /* For IP payload we need to find source interface
337  so we can increase counters and help forward node to
338  pick right FIB */
339  /* RPF check for ip4/ip6 input */
340  if (PREDICT_TRUE(next0 == GRE_INPUT_NEXT_IP4_INPUT
341  || next0 == GRE_INPUT_NEXT_IP6_INPUT
342  || next0 == GRE_INPUT_NEXT_ETHERNET_INPUT
343  || next0 == GRE_INPUT_NEXT_MPLS_INPUT))
344  {
345  u64 key = ((u64)(vnet_buffer(b0)->gre.dst) << 32) |
346  (u64)(vnet_buffer(b0)->gre.src);
347 
348  if (cached_tunnel_key != key)
349  {
351  gre_tunnel_t * t;
352  uword * p;
353 
354  p = hash_get (gm->tunnel_by_key, key);
355  if (!p)
356  {
357  next0 = GRE_INPUT_NEXT_DROP;
358  b0->error = node->errors[GRE_ERROR_NO_SUCH_TUNNEL];
359  goto drop;
360  }
361  t = pool_elt_at_index (gm->tunnels, p[0]);
363  t->hw_if_index);
364  tunnel_sw_if_index = hi->sw_if_index;
365 
366  cached_tunnel_sw_if_index = tunnel_sw_if_index;
367  }
368  else
369  {
370  tunnel_sw_if_index = cached_tunnel_sw_if_index;
371  }
372  }
373  else
374  {
375  next0 = GRE_INPUT_NEXT_DROP;
376  goto drop;
377  }
378  len = vlib_buffer_length_in_chain (vm, b0);
381  cpu_index,
382  tunnel_sw_if_index,
383  1 /* packets */,
384  len /* bytes */);
385 
386  vnet_buffer(b0)->sw_if_index[VLIB_RX] = tunnel_sw_if_index;
387 
388 drop:
390  {
391  gre_rx_trace_t *tr = vlib_add_trace (vm, node,
392  b0, sizeof (*tr));
393  tr->tunnel_id = tunnel_sw_if_index;
394  tr->length = ip0->length;
395  tr->src.as_u32 = ip0->src_address.as_u32;
396  tr->dst.as_u32 = ip0->dst_address.as_u32;
397  }
398 
399  vlib_buffer_advance (b0, sizeof (*h0));
400 
401  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
402  to_next, n_left_to_next,
403  bi0, next0);
404  }
405 
406  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
407  }
409  GRE_ERROR_PKTS_DECAP, from_frame->n_vectors);
410  return from_frame->n_vectors;
411 }
412 
413 static char * gre_error_strings[] = {
414 #define gre_error(n,s) s,
415 #include "error.def"
416 #undef gre_error
417 };
418 
420  .function = gre_input,
421  .name = "gre-input",
422  /* Takes a vector of packets. */
423  .vector_size = sizeof (u32),
424 
425  .runtime_data_bytes = sizeof (gre_input_runtime_t),
426 
427  .n_errors = GRE_N_ERROR,
428  .error_strings = gre_error_strings,
429 
430  .n_next_nodes = GRE_INPUT_N_NEXT,
431  .next_nodes = {
432 #define _(s,n) [GRE_INPUT_NEXT_##s] = n,
434 #undef _
435  },
436 
437  .format_buffer = format_gre_header_with_length,
438  .format_trace = format_gre_rx_trace,
439  .unformat_buffer = unformat_gre_header,
440 };
441 
443 
444 void
446  gre_protocol_t protocol,
447  u32 node_index)
448 {
449  gre_main_t * em = &gre_main;
450  gre_protocol_info_t * pi;
451  gre_input_runtime_t * rt;
452  u16 * n;
453 
454  {
456  if (error)
457  clib_error_report (error);
458  }
459 
460  pi = gre_get_protocol_info (em, protocol);
461  pi->node_index = node_index;
462  pi->next_index = vlib_node_add_next (vm,
463  gre_input_node.index,
464  node_index);
465 
466  /* Setup gre protocol -> next index sparse vector mapping. */
469  clib_host_to_net_u16 (protocol));
470  n[0] = pi->next_index;
471 }
472 
473 static void
474 gre_setup_node (vlib_main_t * vm, u32 node_index)
475 {
476  vlib_node_t * n = vlib_get_node (vm, node_index);
477  pg_node_t * pn = pg_get_node (node_index);
478 
482 }
483 
485 {
486  gre_input_runtime_t * rt;
487  vlib_node_t *ethernet_input, *ip4_input, *ip6_input, *mpls_unicast_input;
488 
489  {
490  clib_error_t * error;
491  error = vlib_call_init_function (vm, gre_init);
492  if (error)
493  clib_error_report (error);
494  }
495 
496  gre_setup_node (vm, gre_input_node.index);
497 
499 
501  (/* elt bytes */ sizeof (rt->next_by_protocol[0]),
502  /* bits in index */ BITS (((gre_header_t *) 0)->protocol));
503 
504  /* These could be moved to the supported protocol input node defn's */
505  ethernet_input = vlib_get_node_by_name (vm, (u8 *)"ethernet-input");
506  ASSERT(ethernet_input);
507  ip4_input = vlib_get_node_by_name (vm, (u8 *)"ip4-input");
508  ASSERT(ip4_input);
509  ip6_input = vlib_get_node_by_name (vm, (u8 *)"ip6-input");
510  ASSERT(ip6_input);
511  mpls_unicast_input = vlib_get_node_by_name (vm, (u8 *)"mpls-input");
512  ASSERT(mpls_unicast_input);
513 
514  gre_register_input_protocol (vm, GRE_PROTOCOL_teb,
515  ethernet_input->index);
516 
517  gre_register_input_protocol (vm, GRE_PROTOCOL_ip4,
518  ip4_input->index);
519 
520  gre_register_input_protocol (vm, GRE_PROTOCOL_ip6,
521  ip6_input->index);
522 
523  gre_register_input_protocol (vm, GRE_PROTOCOL_mpls_unicast,
524  mpls_unicast_input->index);
525 
526  ip4_register_protocol (IP_PROTOCOL_GRE, gre_input_node.index);
527 
528  return 0;
529 }
530 
vnet_main_t * vnet_main
Definition: gre.h:164
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:459
vmrglw vmrglh hi
GRE related global data.
Definition: gre.h:130
format_function_t format_gre_header_with_length
Definition: gre.h:201
#define CLIB_UNUSED(x)
Definition: clib.h:79
u32 hw_if_index
Definition: gre.h:99
static uword ip4_input(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
IPv4 input node.
Definition: ip4_input.c:397
u8 runtime_data[0]
Definition: node.h:469
ip4_address_t dst
Definition: node.c:43
ip4_address_t src_address
Definition: ip4_packet.h:163
vnet_interface_main_t interface_main
Definition: vnet.h:57
uword * tunnel_by_key
Hash mapping src/dst addr pair to tunnel.
Definition: gre.h:148
#define PREDICT_TRUE(x)
Definition: clib.h:98
u32 index
Definition: node.h:237
A GRE payload protocol registration.
Definition: gre.h:42
static vnet_hw_interface_t * vnet_get_hw_interface(vnet_main_t *vnm, u32 hw_if_index)
#define clib_error_report(e)
Definition: error.h:125
u16 * next_by_protocol
Definition: node.c:62
u32 tunnel_id
Definition: node.c:40
void ip4_register_protocol(u32 protocol, u32 node_index)
Definition: ip4_forward.c:1856
vlib_error_t * errors
Definition: node.h:419
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:100
format_function_t format_ip4_address
Definition: format.h:79
static uword vlib_node_add_next(vlib_main_t *vm, uword node, uword next_node)
Definition: node_funcs.h:1063
static pg_node_t * pg_get_node(uword node_index)
Definition: pg.h:350
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:111
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:194
ip4_address_t dst_address
Definition: ip4_packet.h:163
vlib_combined_counter_main_t * combined_sw_if_counters
Definition: interface.h:615
#define sparse_vec_validate(v, i)
Definition: sparse_vec.h:214
#define GRE_VERSION_MASK
Definition: packet.h:49
unsigned long u64
Definition: types.h:89
static void sparse_vec_index2(void *v, u32 si0, u32 si1, u32 *i0_return, u32 *i1_return)
Definition: sparse_vec.h:160
unformat_function_t unformat_gre_header
Definition: gre.h:213
#define vlib_call_init_function(vm, x)
Definition: init.h:161
#define hash_get(h, key)
Definition: hash.h:248
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:369
A representation of a GRE tunnel.
Definition: gre.h:81
static uword gre_input(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: node.c:66
uword os_get_cpu_number(void)
Definition: unix-misc.c:224
u32 node_index
Node which handles this type.
Definition: gre.h:50
static void * vlib_node_get_runtime_data(vlib_main_t *vm, u32 node_index)
Get node runtime private data by node index.
Definition: node_funcs.h:109
#define PREDICT_FALSE(x)
Definition: clib.h:97
u32 length
Definition: node.c:41
format_function_t * format_buffer
Definition: node.h:311
#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:216
#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:350
u16 flags_and_version
Definition: packet.h:37
void gre_register_input_protocol(vlib_main_t *vm, gre_protocol_t protocol, u32 node_index)
Definition: node.c:445
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:121
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1113
static char * gre_error_strings[]
Definition: node.c:413
static clib_error_t * gre_init(vlib_main_t *vm)
Definition: gre.c:415
static uword ethernet_input(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: node.c:734
u16 n_vectors
Definition: node.h:344
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:82
u16 protocol
Definition: packet.h:52
gre_protocol_t
Definition: packet.h:29
u8 * format_gre_rx_trace(u8 *s, va_list *args)
Definition: node.c:46
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:207
unformat_function_t * unformat_buffer
Definition: node.h:312
unformat_function_t * unformat_edit
Definition: pg.h:307
static void gre_setup_node(vlib_main_t *vm, u32 node_index)
Definition: node.c:474
static clib_error_t * gre_input_init(vlib_main_t *vm)
Definition: node.c:484
static uword sparse_vec_index(void *v, uword sparse_index)
Definition: sparse_vec.h:152
u16 cached_next_index
Definition: node.h:463
static void vlib_increment_combined_counter(vlib_combined_counter_main_t *cm, u32 cpu_index, u32 index, u32 packet_increment, u32 byte_increment)
Increment a combined counter.
Definition: counter.h:241
#define ASSERT(truth)
unsigned int u32
Definition: types.h:88
#define foreach_gre_input_next
Definition: node.c:24
#define vnet_buffer(b)
Definition: buffer.h:361
u32 next_index
Next index for this type.
Definition: gre.h:53
gre_tunnel_t * tunnels
pool of tunnel instances
Definition: gre.h:134
ip4_address_t src
Definition: node.c:42
VLIB_NODE_FUNCTION_MULTIARCH(dpdk_input_node, dpdk_input)
vlib_node_registration_t gre_input_node
(constructor) VLIB_REGISTER_NODE (gre_input_node)
Definition: node.c:419
#define VLIB_BUFFER_IS_TRACED
Definition: buffer.h:95
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
#define vec_elt(v, i)
Get vector value at index i.
vlib_node_t * vlib_get_node_by_name(vlib_main_t *vm, u8 *name)
Definition: node.c:45
unsigned short u16
Definition: types.h:57
unsigned char u8
Definition: types.h:56
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:253
unformat_function_t unformat_pg_gre_header
Definition: gre.h:214
gre_input_next_t
Definition: node.c:32
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:170
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:143
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:418
u8 data[0]
Packet data.
Definition: buffer.h:158
static vlib_node_t * vlib_get_node(vlib_main_t *vm, u32 i)
Get vlib node by index.
Definition: node_funcs.h:58
static gre_protocol_info_t * gre_get_protocol_info(gre_main_t *em, gre_protocol_t protocol)
Definition: gre.h:176
static uword ip6_input(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: ip6_input.c:74
static void * sparse_vec_new(uword elt_bytes, uword sparse_index_bits)
Definition: sparse_vec.h:71
u32 flags
buffer flags: VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:85
#define BITS(x)
Definition: clib.h:58
gre_main_t gre_main
Definition: gre.c:22
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
Definition: pg.h:304
Definition: defs.h:46
#define SPARSE_VEC_INVALID_INDEX
Definition: sparse_vec.h:68