FD.io VPP  v20.09-64-g4f7b92f0a
Vector Packet Processing
ip4_input.c
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1 /*
2  * Copyright (c) 2015 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 /*
16  * ip/ip4_input.c: IP v4 input node
17  *
18  * Copyright (c) 2008 Eliot Dresselhaus
19  *
20  * Permission is hereby granted, free of charge, to any person obtaining
21  * a copy of this software and associated documentation files (the
22  * "Software"), to deal in the Software without restriction, including
23  * without limitation the rights to use, copy, modify, merge, publish,
24  * distribute, sublicense, and/or sell copies of the Software, and to
25  * permit persons to whom the Software is furnished to do so, subject to
26  * the following conditions:
27  *
28  * The above copyright notice and this permission notice shall be
29  * included in all copies or substantial portions of the Software.
30  *
31  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38  */
39 
40 #include <vnet/ip/ip4_input.h>
41 #include <vnet/ethernet/ethernet.h>
42 #include <vnet/ppp/ppp.h>
43 #include <vnet/hdlc/hdlc.h>
44 #include <vnet/util/throttle.h>
45 
46 typedef struct
47 {
48  u8 packet_data[64];
50 
51 static u8 *
52 format_ip4_input_trace (u8 * s, va_list * va)
53 {
54  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
55  CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
56  ip4_input_trace_t *t = va_arg (*va, ip4_input_trace_t *);
57 
58  s = format (s, "%U",
59  format_ip4_header, t->packet_data, sizeof (t->packet_data));
60 
61  return s;
62 }
63 
66 {
67  ip4_main_t *im = &ip4_main;
68  ip_lookup_main_t *lm = &im->lookup_main;
69  u32 next;
70  u8 arc;
71 
73 
75  {
77  arc = lm->mcast_feature_arc_index;
78  }
79  else
80  {
81  next = IP4_INPUT_NEXT_LOOKUP;
82  arc = lm->ucast_feature_arc_index;
83  }
84 
85  if (arc_enabled)
86  vnet_feature_arc_start (arc, sw_if_index, &next, b);
87 
88  return next;
89 }
90 
94  u32 * last_sw_if_index, u32 * cnt,
95  int *arc_enabled)
96 {
97  ip4_main_t *im = &ip4_main;
98  ip_lookup_main_t *lm = &im->lookup_main;
99  u32 thread_index;
100  if (*last_sw_if_index == sw_if_index)
101  {
102  (*cnt)++;
103  return;
104  }
105 
106  thread_index = vm->thread_index;
107  if (*cnt)
108  vlib_increment_simple_counter (cm, thread_index, *last_sw_if_index, *cnt);
109  *cnt = 1;
110  *last_sw_if_index = sw_if_index;
111 
112  if (vnet_have_features (lm->ucast_feature_arc_index, sw_if_index) ||
113  vnet_have_features (lm->mcast_feature_arc_index, sw_if_index))
114  *arc_enabled = 1;
115  else
116  *arc_enabled = 0;
117 }
118 
119 /* Validate IP v4 packets and pass them either to forwarding code
120  or drop/punt exception packets. */
124  vlib_frame_t * frame, int verify_checksum)
125 {
126  vnet_main_t *vnm = vnet_get_main ();
127  u32 n_left_from, *from;
128  u32 thread_index = vm->thread_index;
129  vlib_node_runtime_t *error_node =
132  vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
133  ip4_header_t *ip[4];
134  u16 nexts[VLIB_FRAME_SIZE], *next;
135  u32 sw_if_index[4];
136  u32 last_sw_if_index = ~0;
137  u32 cnt = 0;
138  int arc_enabled = 0;
139 
140  from = vlib_frame_vector_args (frame);
141  n_left_from = frame->n_vectors;
142 
143  if (node->flags & VLIB_NODE_FLAG_TRACE)
144  vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
145  /* stride */ 1,
146  sizeof (ip4_input_trace_t));
147 
150 
151  vlib_get_buffers (vm, from, bufs, n_left_from);
152  b = bufs;
153  next = nexts;
154 #if (CLIB_N_PREFETCHES >= 8)
155  while (n_left_from >= 4)
156  {
157  u32 x = 0;
158 
159  /* Prefetch next iteration. */
160  if (n_left_from >= 12)
161  {
162  vlib_prefetch_buffer_header (b[8], LOAD);
163  vlib_prefetch_buffer_header (b[9], LOAD);
164  vlib_prefetch_buffer_header (b[10], LOAD);
165  vlib_prefetch_buffer_header (b[11], LOAD);
166 
167  vlib_prefetch_buffer_data (b[4], LOAD);
168  vlib_prefetch_buffer_data (b[5], LOAD);
169  vlib_prefetch_buffer_data (b[6], LOAD);
170  vlib_prefetch_buffer_data (b[7], LOAD);
171  }
172 
173  vnet_buffer (b[0])->ip.adj_index[VLIB_RX] = ~0;
174  vnet_buffer (b[1])->ip.adj_index[VLIB_RX] = ~0;
175  vnet_buffer (b[2])->ip.adj_index[VLIB_RX] = ~0;
176  vnet_buffer (b[3])->ip.adj_index[VLIB_RX] = ~0;
177 
178  sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
179  sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
180  sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
181  sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
182 
183  x |= sw_if_index[0] ^ last_sw_if_index;
184  x |= sw_if_index[1] ^ last_sw_if_index;
185  x |= sw_if_index[2] ^ last_sw_if_index;
186  x |= sw_if_index[3] ^ last_sw_if_index;
187 
188  if (PREDICT_TRUE (x == 0))
189  {
190  /* we deal with 4 more packets sharing the same sw_if_index
191  with the previous one, so we can optimize */
192  cnt += 4;
193  if (arc_enabled)
194  {
195  next[0] = ip4_input_set_next (sw_if_index[0], b[0], 1);
196  next[1] = ip4_input_set_next (sw_if_index[1], b[1], 1);
197  next[2] = ip4_input_set_next (sw_if_index[2], b[2], 1);
198  next[3] = ip4_input_set_next (sw_if_index[3], b[3], 1);
199  }
200  else
201  {
202  next[0] = ip4_input_set_next (sw_if_index[0], b[0], 0);
203  next[1] = ip4_input_set_next (sw_if_index[1], b[1], 0);
204  next[2] = ip4_input_set_next (sw_if_index[2], b[2], 0);
205  next[3] = ip4_input_set_next (sw_if_index[3], b[3], 0);
206  }
207  }
208  else
209  {
210  ip4_input_check_sw_if_index (vm, cm, sw_if_index[0],
211  &last_sw_if_index, &cnt, &arc_enabled);
212  ip4_input_check_sw_if_index (vm, cm, sw_if_index[1],
213  &last_sw_if_index, &cnt, &arc_enabled);
214  ip4_input_check_sw_if_index (vm, cm, sw_if_index[2],
215  &last_sw_if_index, &cnt, &arc_enabled);
216  ip4_input_check_sw_if_index (vm, cm, sw_if_index[3],
217  &last_sw_if_index, &cnt, &arc_enabled);
218 
219  next[0] = ip4_input_set_next (sw_if_index[0], b[0], 1);
220  next[1] = ip4_input_set_next (sw_if_index[1], b[1], 1);
221  next[2] = ip4_input_set_next (sw_if_index[2], b[2], 1);
222  next[3] = ip4_input_set_next (sw_if_index[3], b[3], 1);
223  }
224 
225  ip[0] = vlib_buffer_get_current (b[0]);
226  ip[1] = vlib_buffer_get_current (b[1]);
227  ip[2] = vlib_buffer_get_current (b[2]);
228  ip[3] = vlib_buffer_get_current (b[3]);
229 
230  ip4_input_check_x4 (vm, error_node, b, ip, next, verify_checksum);
231 
232  /* next */
233  b += 4;
234  next += 4;
235  n_left_from -= 4;
236  }
237 #elif (CLIB_N_PREFETCHES >= 4)
238  while (n_left_from >= 2)
239  {
240  u32 x = 0;
241  u32 next0, next1;
242 
243  /* Prefetch next iteration. */
244  if (n_left_from >= 6)
245  {
246  vlib_prefetch_buffer_header (b[4], LOAD);
247  vlib_prefetch_buffer_header (b[5], LOAD);
248 
249  vlib_prefetch_buffer_data (b[2], LOAD);
250  vlib_prefetch_buffer_data (b[3], LOAD);
251  }
252 
253  vnet_buffer (b[0])->ip.adj_index[VLIB_RX] = ~0;
254  vnet_buffer (b[1])->ip.adj_index[VLIB_RX] = ~0;
255 
256  sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
257  sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
258 
259  x |= sw_if_index[0] ^ last_sw_if_index;
260  x |= sw_if_index[1] ^ last_sw_if_index;
261 
262  if (PREDICT_TRUE (x == 0))
263  {
264  /* we deal with 2 more packets sharing the same sw_if_index
265  with the previous one, so we can optimize */
266  cnt += 2;
267  if (arc_enabled)
268  {
269  next0 = ip4_input_set_next (sw_if_index[0], b[0], 1);
270  next1 = ip4_input_set_next (sw_if_index[1], b[1], 1);
271  }
272  else
273  {
274  next0 = ip4_input_set_next (sw_if_index[0], b[0], 0);
275  next1 = ip4_input_set_next (sw_if_index[1], b[1], 0);
276  }
277  }
278  else
279  {
280  ip4_input_check_sw_if_index (vm, cm, sw_if_index[0],
281  &last_sw_if_index, &cnt, &arc_enabled);
282  ip4_input_check_sw_if_index (vm, cm, sw_if_index[1],
283  &last_sw_if_index, &cnt, &arc_enabled);
284 
285  next0 = ip4_input_set_next (sw_if_index[0], b[0], 1);
286  next1 = ip4_input_set_next (sw_if_index[1], b[1], 1);
287  }
288 
289  ip[0] = vlib_buffer_get_current (b[0]);
290  ip[1] = vlib_buffer_get_current (b[1]);
291 
292  ip4_input_check_x2 (vm, error_node, b[0], b[1], ip[0], ip[1],
293  &next0, &next1, verify_checksum);
294  next[0] = (u16) next0;
295  next[1] = (u16) next1;
296 
297  /* next */
298  b += 2;
299  next += 2;
300  n_left_from -= 2;
301  }
302 #endif
303 
304  while (n_left_from)
305  {
306  u32 next0;
307  vnet_buffer (b[0])->ip.adj_index[VLIB_RX] = ~0;
308  sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
309  ip4_input_check_sw_if_index (vm, cm, sw_if_index[0], &last_sw_if_index,
310  &cnt, &arc_enabled);
311  next0 = ip4_input_set_next (sw_if_index[0], b[0], arc_enabled);
312  ip[0] = vlib_buffer_get_current (b[0]);
313  ip4_input_check_x1 (vm, error_node, b[0], ip[0], &next0,
314  verify_checksum);
315  next[0] = next0;
316 
317  /* next */
318  b += 1;
319  next += 1;
320  n_left_from -= 1;
321  }
322 
323  vlib_increment_simple_counter (cm, thread_index, last_sw_if_index, cnt);
324  vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
325  return frame->n_vectors;
326 }
327 
328 /** \brief IPv4 input node.
329  @node ip4-input
330 
331  This is the IPv4 input node: validates ip4 header checksums,
332  verifies ip header lengths, discards pkts with expired TTLs,
333  and sends pkts to the set of ip feature nodes configured on
334  the rx interface.
335 
336  @param vm vlib_main_t corresponding to the current thread
337  @param node vlib_node_runtime_t
338  @param frame vlib_frame_t whose contents should be dispatched
339 
340  @par Graph mechanics: buffer metadata, next index usage
341 
342  @em Uses:
343  - vnet_feature_config_main_t cm corresponding to each pkt's dst address unicast /
344  multicast status.
345  - <code>b->current_config_index</code> corresponding to each pkt's
346  rx sw_if_index.
347  - This sets the per-packet graph trajectory, ensuring that
348  each packet visits the per-interface features in order.
349 
350  - <code>vnet_buffer(b)->sw_if_index[VLIB_RX]</code>
351  - Indicates the @c sw_if_index value of the interface that the
352  packet was received on.
353 
354  @em Sets:
355  - <code>vnet_buffer(b)->ip.adj_index[VLIB_TX]</code>
356  - The lookup result adjacency index.
357 
358  <em>Next Indices:</em>
359  - Dispatches pkts to the (first) feature node:
360  <code> vnet_get_config_data (... &next0 ...); </code>
361  or @c error-drop
362 */
365 {
366  return ip4_input_inline (vm, node, frame, /* verify_checksum */ 1);
367 }
368 
372 {
373  return ip4_input_inline (vm, node, frame, /* verify_checksum */ 0);
374 }
375 
376 #ifndef CLIB_MARCH_VARIANT
377 char *ip4_error_strings[] = {
378 #define _(sym,string) string,
380 #undef _
381 };
382 #endif
383 
384 /* *INDENT-OFF* */
386  .name = "ip4-input",
387  .vector_size = sizeof (u32),
388  .protocol_hint = VLIB_NODE_PROTO_HINT_IP4,
389 
390  .n_errors = IP4_N_ERROR,
391  .error_strings = ip4_error_strings,
392 
393  .n_next_nodes = IP4_INPUT_N_NEXT,
394  .next_nodes = {
395  [IP4_INPUT_NEXT_DROP] = "error-drop",
396  [IP4_INPUT_NEXT_PUNT] = "error-punt",
397  [IP4_INPUT_NEXT_OPTIONS] = "ip4-options",
398  [IP4_INPUT_NEXT_LOOKUP] = "ip4-lookup",
399  [IP4_INPUT_NEXT_LOOKUP_MULTICAST] = "ip4-mfib-forward-lookup",
400  [IP4_INPUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
401  [IP4_INPUT_NEXT_REASSEMBLY] = "ip4-full-reassembly",
402  },
403 
404  .format_buffer = format_ip4_header,
405  .format_trace = format_ip4_input_trace,
406 };
407 
409  .name = "ip4-input-no-checksum",
410  .vector_size = sizeof (u32),
411 
412  .sibling_of = "ip4-input",
413  .format_buffer = format_ip4_header,
414  .format_trace = format_ip4_input_trace,
415 };
416 /* *INDENT-ON* */
417 
418 static clib_error_t *
420 {
421  clib_error_t *error;
422 
423  ethernet_register_input_type (vm, ETHERNET_TYPE_IP4, ip4_input_node.index);
424  ppp_register_input_protocol (vm, PPP_PROTOCOL_ip4, ip4_input_node.index);
425  hdlc_register_input_protocol (vm, HDLC_PROTOCOL_ip4, ip4_input_node.index);
426 
427  {
429  pg_node_t *pn;
430  pn = pg_get_node (ip4_input_node.index);
432  pn = pg_get_node (ip4_input_no_checksum_node.index);
434  }
435 
436  if ((error = vlib_call_init_function (vm, ip4_cli_init)))
437  return error;
438 
439  if ((error = vlib_call_init_function
441  return error;
442 
443  /* Set flow hash to something non-zero. */
444  ip4_main.flow_hash_seed = 0xdeadbeef;
445 
446  /* Default TTL for packets we generate. */
447  ip4_main.host_config.ttl = 64;
448 
449  return error;
450 }
451 
453 
454 static clib_error_t *
456 {
457  ip4_main_t *im = &ip4_main;
459  u32 n_vlib_mains = tm->n_vlib_mains;
460 
461  throttle_init (&im->arp_throttle, n_vlib_mains, 1e-3);
462 
463  return (NULL);
464 }
465 
467 
468 /*
469  * fd.io coding-style-patch-verification: ON
470  *
471  * Local Variables:
472  * eval: (c-set-style "gnu")
473  * End:
474  */
#define CLIB_UNUSED(x)
Definition: clib.h:87
vnet_main_t * vnet_get_main(void)
Definition: misc.c:46
#define VLIB_MAIN_LOOP_ENTER_FUNCTION(x)
Definition: init.h:176
vnet_interface_main_t interface_main
Definition: vnet.h:59
format_function_t format_ip4_header
Definition: format.h:81
#define PREDICT_TRUE(x)
Definition: clib.h:121
u32 thread_index
Definition: main.h:249
void throttle_init(throttle_t *t, u32 n_threads, f64 time)
Definition: throttle.c:19
static_always_inline u32 ip4_input_set_next(u32 sw_if_index, vlib_buffer_t *b, int arc_enabled)
Definition: ip4_input.c:65
unformat_function_t unformat_pg_ip4_header
Definition: format.h:86
ip_lookup_main_t lookup_main
Definition: ip4.h:108
vlib_main_t * vm
Definition: in2out_ed.c:1582
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
static void vlib_increment_simple_counter(vlib_simple_counter_main_t *cm, u32 thread_index, u32 index, u64 increment)
Increment a simple counter.
Definition: counter.h:78
static_always_inline int vnet_have_features(u8 arc, u32 sw_if_index)
Definition: feature.h:251
#define VLIB_NODE_FN(node)
Definition: node.h:202
static uword ip4_address_is_multicast(const ip4_address_t *a)
Definition: ip4_packet.h:434
static clib_error_t * ip4_cli_init(vlib_main_t *vm)
Definition: ip46_cli.c:307
u8 mcast_feature_arc_index
Feature arc indices.
Definition: lookup.h:167
unsigned char u8
Definition: types.h:56
static pg_node_t * pg_get_node(uword node_index)
Definition: pg.h:374
#define static_always_inline
Definition: clib.h:108
static clib_error_t * ip4_main_loop_enter(vlib_main_t *vm)
Definition: ip4_input.c:455
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:173
static clib_error_t * ip4_init(vlib_main_t *vm)
Definition: ip4_input.c:419
ip4_address_t dst_address
Definition: ip4_packet.h:125
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:203
char * ip4_error_strings[]
Definition: ip4_input.c:377
#define vec_elt_at_index(v, i)
Get vector value at index i checking that i is in bounds.
static void ip4_input_check_x1(vlib_main_t *vm, vlib_node_runtime_t *error_node, vlib_buffer_t *p0, ip4_header_t *ip0, u32 *next0, int verify_checksum)
Definition: ip4_input.h:278
unsigned int u32
Definition: types.h:88
A collection of simple counters.
Definition: counter.h:57
#define vlib_call_init_function(vm, x)
Definition: init.h:270
#define VLIB_FRAME_SIZE
Definition: node.h:377
vlib_node_registration_t ip4_input_no_checksum_node
(constructor) VLIB_REGISTER_NODE (ip4_input_no_checksum_node)
Definition: ip4_input.c:408
vnet_crypto_main_t * cm
Definition: quic_crypto.c:53
static u8 * format_ip4_input_trace(u8 *s, va_list *va)
Definition: ip4_input.c:52
unsigned short u16
Definition: types.h:57
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:229
#define PREDICT_FALSE(x)
Definition: clib.h:120
#define always_inline
Definition: ipsec.h:28
vlib_simple_counter_main_t * sw_if_counters
Definition: interface.h:880
vlib_thread_main_t vlib_thread_main
Definition: threads.c:35
u8 packet_data[64]
Definition: ip4_input.c:48
#define foreach_ip4_error
Definition: ip4_error.h:43
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
u16 n_vectors
Definition: node.h:396
static_always_inline void vlib_buffer_enqueue_to_next(vlib_main_t *vm, vlib_node_runtime_t *node, u32 *buffers, u16 *nexts, uword count)
Definition: buffer_node.h:339
static vlib_node_runtime_t * vlib_node_get_runtime(vlib_main_t *vm, u32 node_index)
Get node runtime by node index.
Definition: node_funcs.h:115
unformat_function_t * unformat_edit
Definition: pg.h:321
#define vlib_prefetch_buffer_data(b, type)
Definition: buffer.h:204
void hdlc_register_input_protocol(vlib_main_t *vm, hdlc_protocol_t protocol, u32 node_index)
Definition: node.c:347
static uword ip4_input_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, int verify_checksum)
Definition: ip4_input.c:122
vlib_main_t vlib_node_runtime_t * node
Definition: in2out_ed.c:1582
IPv4 main type.
Definition: ip4.h:106
throttle_t arp_throttle
ARP throttling.
Definition: ip4.h:177
void ethernet_register_input_type(vlib_main_t *vm, ethernet_type_t type, u32 node_index)
Definition: node.c:2276
struct _vlib_node_registration vlib_node_registration_t
u8 ucast_feature_arc_index
Definition: lookup.h:168
void ppp_register_input_protocol(vlib_main_t *vm, ppp_protocol_t protocol, u32 node_index)
Definition: node.c:334
void vlib_trace_frame_buffers_only(vlib_main_t *vm, vlib_node_runtime_t *node, u32 *buffers, uword n_buffers, uword next_buffer_stride, uword n_buffer_data_bytes_in_trace)
Definition: trace.c:47
vl_api_address_t ip
Definition: l2.api:501
static void ip4_input_check_x2(vlib_main_t *vm, vlib_node_runtime_t *error_node, vlib_buffer_t *p0, vlib_buffer_t *p1, ip4_header_t *ip0, ip4_header_t *ip1, u32 *next0, u32 *next1, int verify_checksum)
Definition: ip4_input.h:203
clib_error_t * ip4_source_and_port_range_check_init(vlib_main_t *vm)
vlib_main_t vlib_node_runtime_t vlib_frame_t * frame
Definition: in2out_ed.c:1583
static void ip4_input_check_x4(vlib_main_t *vm, vlib_node_runtime_t *error_node, vlib_buffer_t **p, ip4_header_t **ip, u16 *next, int verify_checksum)
Definition: ip4_input.h:79
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:297
#define vnet_buffer(b)
Definition: buffer.h:417
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1144
vlib_node_registration_t ip4_input_node
(constructor) VLIB_REGISTER_NODE (ip4_input_node)
Definition: ip4_input.c:385
u16 flags
Copy of main node flags.
Definition: node.h:500
u32 flow_hash_seed
Seed for Jenkins hash used to compute ip4 flow hash.
Definition: ip4.h:153
struct ip4_main_t::@360 host_config
Template information for VPP generated packets.
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 VLIB_NODE_FLAG_TRACE
Definition: node.h:301
u8 ttl
TTL to use for host generated packets.
Definition: ip4.h:159
Definition: pg.h:318
vl_api_interface_index_t sw_if_index
Definition: wireguard.api:33
Definition: defs.h:46
static_always_inline void ip4_input_check_sw_if_index(vlib_main_t *vm, vlib_simple_counter_main_t *cm, u32 sw_if_index, u32 *last_sw_if_index, u32 *cnt, int *arc_enabled)
Definition: ip4_input.c:92
static_always_inline void vnet_feature_arc_start(u8 arc, u32 sw_if_index, u32 *next0, vlib_buffer_t *b0)
Definition: feature.h:302