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ip4_source_and_port_range_check.c
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1 /*
2  * Copyright (c) 2016 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 #include <vnet/ip/ip.h>
17 #include <vnet/dpo/load_balance.h>
18 #include <vnet/fib/fib_table.h>
19 #include <vnet/fib/ip4_fib.h>
20 
22 
23 /**
24  * @file
25  * @brief IPv4 Source and Port Range Checking.
26  *
27  * This file contains the source code for IPv4 source and port range
28  * checking.
29  */
30 
31 
32 /**
33  * @brief The pool of range chack DPOs
34  */
36 
37 /**
38  * @brief Dynamically registered DPO type
39  */
41 
44 
45 #define foreach_ip4_source_and_port_range_check_error \
46  _(CHECK_FAIL, "ip4 source and port range check bad packets") \
47  _(CHECK_OK, "ip4 source and port range check good packets")
48 
49 typedef enum
50 {
51 #define _(sym,str) IP4_SOURCE_AND_PORT_RANGE_CHECK_ERROR_##sym,
53 #undef _
56 
58 #define _(sym,string) string,
60 #undef _
61 };
62 
63 typedef struct
64 {
72 
73 static u8 *
75 {
76  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
77  CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
80 
81  if (t->bypass)
82  s = format (s, "PASS (bypass case)");
83  else
84  s = format (s, "fib %d src ip %U %s dst port %d: %s",
86  t->is_tcp ? "TCP" : "UDP", (u32) t->port,
87  (t->pass == 1) ? "PASS" : "FAIL");
88  return s;
89 }
90 
91 typedef enum
92 {
96 
97 
98 static inline u32
100  u16 dst_port, u32 next)
101 {
102  u16x8vec_t key;
103  u16x8vec_t diff1;
104  u16x8vec_t diff2;
105  u16x8vec_t sum, sum_equal_diff2;
106  u16 sum_nonzero, sum_equal, winner_mask;
107  int i;
108 
109  if (NULL == ppr_dpo || dst_port == 0)
111 
112  /* Make the obvious screw-case work. A variant also works w/ no MMX */
113  if (PREDICT_FALSE (dst_port == 65535))
114  {
115  int j;
116 
117  for (i = 0;
119  i++)
120  {
121  for (j = 0; j < 8; j++)
122  if (ppr_dpo->blocks[i].low.as_u16[j] == 65535)
123  return next;
124  }
126  }
127 
128  key.as_u16x8 = u16x8_splat (dst_port);
129 
130  for (i = 0; i < ppr_dpo->n_used_blocks; i++)
131  {
132  diff1.as_u16x8 =
133  u16x8_sub_saturate (ppr_dpo->blocks[i].low.as_u16x8, key.as_u16x8);
134  diff2.as_u16x8 =
135  u16x8_sub_saturate (ppr_dpo->blocks[i].hi.as_u16x8, key.as_u16x8);
136  sum.as_u16x8 = diff1.as_u16x8 + diff2.as_u16x8;
137  sum_equal_diff2.as_u16x8 = (sum.as_u16x8 == diff2.as_u16x8);
138  sum_nonzero = ~u16x8_zero_byte_mask (sum.as_u16x8);
139  sum_equal = ~u16x8_zero_byte_mask (sum_equal_diff2.as_u16x8);
140  winner_mask = sum_nonzero & sum_equal;
141  if (winner_mask)
142  return next;
143  }
145 }
146 
149 {
150  return (pool_elt_at_index (ppr_dpo_pool, index));
151 }
152 
155  vlib_node_runtime_t * node,
156  vlib_frame_t * frame, int is_tx)
157 {
158  ip4_main_t *im = &ip4_main;
159  u32 n_left_from, *from, *to_next;
160  u32 next_index;
161  vlib_node_runtime_t *error_node = node;
162  u32 good_packets = 0;
163  int i;
164 
165  from = vlib_frame_vector_args (frame);
166  n_left_from = frame->n_vectors;
167  next_index = node->cached_next_index;
168 
169  while (n_left_from > 0)
170  {
171  u32 n_left_to_next;
172 
173  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
174 
175 
176  /* while (n_left_from >= 4 && n_left_to_next >= 2) */
177  /* { */
178  /* vlib_buffer_t *b0, *b1; */
179  /* ip4_header_t *ip0, *ip1; */
180  /* ip4_fib_mtrie_t *mtrie0, *mtrie1; */
181  /* ip4_fib_mtrie_leaf_t leaf0, leaf1; */
182  /* ip_source_and_port_range_check_config_t *c0, *c1; */
183  /* ip_adjacency_t *adj0 = 0, *adj1 = 0; */
184  /* u32 bi0, next0, adj_index0, pass0, save_next0, fib_index0; */
185  /* u32 bi1, next1, adj_index1, pass1, save_next1, fib_index1; */
186  /* udp_header_t *udp0, *udp1; */
187 
188  /* /\* Prefetch next iteration. *\/ */
189  /* { */
190  /* vlib_buffer_t *p2, *p3; */
191 
192  /* p2 = vlib_get_buffer (vm, from[2]); */
193  /* p3 = vlib_get_buffer (vm, from[3]); */
194 
195  /* vlib_prefetch_buffer_header (p2, LOAD); */
196  /* vlib_prefetch_buffer_header (p3, LOAD); */
197 
198  /* CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD); */
199  /* CLIB_PREFETCH (p3->data, sizeof (ip1[0]), LOAD); */
200  /* } */
201 
202  /* bi0 = to_next[0] = from[0]; */
203  /* bi1 = to_next[1] = from[1]; */
204  /* from += 2; */
205  /* to_next += 2; */
206  /* n_left_from -= 2; */
207  /* n_left_to_next -= 2; */
208 
209  /* b0 = vlib_get_buffer (vm, bi0); */
210  /* b1 = vlib_get_buffer (vm, bi1); */
211 
212  /* fib_index0 = */
213  /* vec_elt (im->fib_index_by_sw_if_index, */
214  /* vnet_buffer (b0)->sw_if_index[VLIB_RX]); */
215  /* fib_index1 = */
216  /* vec_elt (im->fib_index_by_sw_if_index, */
217  /* vnet_buffer (b1)->sw_if_index[VLIB_RX]); */
218 
219  /* ip0 = vlib_buffer_get_current (b0); */
220  /* ip1 = vlib_buffer_get_current (b1); */
221 
222  /* if (is_tx) */
223  /* { */
224  /* c0 = vnet_get_config_data (&tx_cm->config_main, */
225  /* &b0->current_config_index, */
226  /* &next0, sizeof (c0[0])); */
227  /* c1 = vnet_get_config_data (&tx_cm->config_main, */
228  /* &b1->current_config_index, */
229  /* &next1, sizeof (c1[0])); */
230  /* } */
231  /* else */
232  /* { */
233  /* c0 = vnet_get_config_data (&rx_cm->config_main, */
234  /* &b0->current_config_index, */
235  /* &next0, sizeof (c0[0])); */
236  /* c1 = vnet_get_config_data (&rx_cm->config_main, */
237  /* &b1->current_config_index, */
238  /* &next1, sizeof (c1[0])); */
239  /* } */
240 
241  /* /\* we can't use the default VRF here... *\/ */
242  /* for (i = 0; i < IP_SOURCE_AND_PORT_RANGE_CHECK_N_PROTOCOLS; i++) */
243  /* { */
244  /* ASSERT (c0->fib_index[i] && c1->fib_index[i]); */
245  /* } */
246 
247 
248  /* if (is_tx) */
249  /* { */
250  /* if (ip0->protocol == IP_PROTOCOL_UDP) */
251  /* fib_index0 = */
252  /* c0->fib_index */
253  /* [IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_UDP_IN]; */
254  /* if (ip0->protocol == IP_PROTOCOL_TCP) */
255  /* fib_index0 = */
256  /* c0->fib_index */
257  /* [IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_TCP_IN]; */
258  /* } */
259  /* else */
260  /* { */
261  /* if (ip0->protocol == IP_PROTOCOL_UDP) */
262  /* fib_index0 = */
263  /* c0->fib_index */
264  /* [IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_UDP_OUT]; */
265  /* if (ip0->protocol == IP_PROTOCOL_TCP) */
266  /* fib_index0 = */
267  /* c0->fib_index */
268  /* [IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_TCP_OUT]; */
269  /* } */
270 
271  /* if (PREDICT_TRUE (fib_index0 != ~0)) */
272  /* { */
273 
274  /* mtrie0 = &vec_elt_at_index (im->fibs, fib_index0)->mtrie; */
275 
276  /* leaf0 = IP4_FIB_MTRIE_LEAF_ROOT; */
277 
278  /* leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, */
279  /* &ip0->src_address, 0); */
280 
281  /* leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, */
282  /* &ip0->src_address, 1); */
283 
284  /* leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, */
285  /* &ip0->src_address, 2); */
286 
287  /* leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, */
288  /* &ip0->src_address, 3); */
289 
290  /* adj_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0); */
291 
292  /* ASSERT (adj_index0 == ip4_fib_lookup_with_table (im, fib_index0, */
293  /* &ip0->src_address, */
294  /* 0 */
295  /* /\* use dflt rt *\/ */
296  /* )); */
297  /* adj0 = ip_get_adjacency (lm, adj_index0); */
298  /* } */
299 
300  /* if (is_tx) */
301  /* { */
302  /* if (ip1->protocol == IP_PROTOCOL_UDP) */
303  /* fib_index1 = */
304  /* c1->fib_index */
305  /* [IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_UDP_IN]; */
306  /* if (ip1->protocol == IP_PROTOCOL_TCP) */
307  /* fib_index1 = */
308  /* c1->fib_index */
309  /* [IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_TCP_IN]; */
310  /* } */
311  /* else */
312  /* { */
313  /* if (ip1->protocol == IP_PROTOCOL_UDP) */
314  /* fib_index1 = */
315  /* c1->fib_index */
316  /* [IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_UDP_OUT]; */
317  /* if (ip1->protocol == IP_PROTOCOL_TCP) */
318  /* fib_index1 = */
319  /* c1->fib_index */
320  /* [IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_TCP_OUT]; */
321  /* } */
322 
323  /* if (PREDICT_TRUE (fib_index1 != ~0)) */
324  /* { */
325 
326  /* mtrie1 = &vec_elt_at_index (im->fibs, fib_index1)->mtrie; */
327 
328  /* leaf1 = IP4_FIB_MTRIE_LEAF_ROOT; */
329 
330  /* leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1, */
331  /* &ip1->src_address, 0); */
332 
333  /* leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1, */
334  /* &ip1->src_address, 1); */
335 
336  /* leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1, */
337  /* &ip1->src_address, 2); */
338 
339  /* leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1, */
340  /* &ip1->src_address, 3); */
341 
342  /* adj_index1 = ip4_fib_mtrie_leaf_get_adj_index (leaf1); */
343 
344  /* ASSERT (adj_index1 == ip4_fib_lookup_with_table (im, fib_index1, */
345  /* &ip1->src_address, */
346  /* 0)); */
347  /* adj1 = ip_get_adjacency (lm, adj_index1); */
348  /* } */
349 
350  /* pass0 = 0; */
351  /* pass0 |= adj0 == 0; */
352  /* pass0 |= ip4_address_is_multicast (&ip0->src_address); */
353  /* pass0 |= */
354  /* ip0->src_address.as_u32 == clib_host_to_net_u32 (0xFFFFFFFF); */
355  /* pass0 |= (ip0->protocol != IP_PROTOCOL_UDP) */
356  /* && (ip0->protocol != IP_PROTOCOL_TCP); */
357 
358  /* pass1 = 0; */
359  /* pass1 |= adj1 == 0; */
360  /* pass1 |= ip4_address_is_multicast (&ip1->src_address); */
361  /* pass1 |= */
362  /* ip1->src_address.as_u32 == clib_host_to_net_u32 (0xFFFFFFFF); */
363  /* pass1 |= (ip1->protocol != IP_PROTOCOL_UDP) */
364  /* && (ip1->protocol != IP_PROTOCOL_TCP); */
365 
366  /* save_next0 = next0; */
367  /* udp0 = ip4_next_header (ip0); */
368  /* save_next1 = next1; */
369  /* udp1 = ip4_next_header (ip1); */
370 
371  /* if (PREDICT_TRUE (pass0 == 0)) */
372  /* { */
373  /* good_packets++; */
374  /* next0 = check_adj_port_range_x1 */
375  /* (adj0, clib_net_to_host_u16 (udp0->dst_port), next0); */
376  /* good_packets -= (save_next0 != next0); */
377  /* b0->error = error_node->errors */
378  /* [IP4_SOURCE_AND_PORT_RANGE_CHECK_ERROR_CHECK_FAIL]; */
379  /* } */
380 
381  /* if (PREDICT_TRUE (pass1 == 0)) */
382  /* { */
383  /* good_packets++; */
384  /* next1 = check_adj_port_range_x1 */
385  /* (adj1, clib_net_to_host_u16 (udp1->dst_port), next1); */
386  /* good_packets -= (save_next1 != next1); */
387  /* b1->error = error_node->errors */
388  /* [IP4_SOURCE_AND_PORT_RANGE_CHECK_ERROR_CHECK_FAIL]; */
389  /* } */
390 
391  /* if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) */
392  /* && (b0->flags & VLIB_BUFFER_IS_TRACED))) */
393  /* { */
394  /* ip4_source_and_port_range_check_trace_t *t = */
395  /* vlib_add_trace (vm, node, b0, sizeof (*t)); */
396  /* t->pass = next0 == save_next0; */
397  /* t->bypass = pass0; */
398  /* t->fib_index = fib_index0; */
399  /* t->src_addr.as_u32 = ip0->src_address.as_u32; */
400  /* t->port = (pass0 == 0) ? */
401  /* clib_net_to_host_u16 (udp0->dst_port) : 0; */
402  /* t->is_tcp = ip0->protocol == IP_PROTOCOL_TCP; */
403  /* } */
404 
405  /* if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) */
406  /* && (b1->flags & VLIB_BUFFER_IS_TRACED))) */
407  /* { */
408  /* ip4_source_and_port_range_check_trace_t *t = */
409  /* vlib_add_trace (vm, node, b1, sizeof (*t)); */
410  /* t->pass = next1 == save_next1; */
411  /* t->bypass = pass1; */
412  /* t->fib_index = fib_index1; */
413  /* t->src_addr.as_u32 = ip1->src_address.as_u32; */
414  /* t->port = (pass1 == 0) ? */
415  /* clib_net_to_host_u16 (udp1->dst_port) : 0; */
416  /* t->is_tcp = ip1->protocol == IP_PROTOCOL_TCP; */
417  /* } */
418 
419  /* vlib_validate_buffer_enqueue_x2 (vm, node, next_index, */
420  /* to_next, n_left_to_next, */
421  /* bi0, bi1, next0, next1); */
422  /* } */
423 
424  while (n_left_from > 0 && n_left_to_next > 0)
425  {
426  vlib_buffer_t *b0;
427  ip4_header_t *ip0;
429  u32 bi0, next0, lb_index0, pass0, save_next0, fib_index0;
430  udp_header_t *udp0;
431  const protocol_port_range_dpo_t *ppr_dpo0 = NULL;
432  const dpo_id_t *dpo;
433  u32 sw_if_index0;
434 
435  bi0 = from[0];
436  to_next[0] = bi0;
437  from += 1;
438  to_next += 1;
439  n_left_from -= 1;
440  n_left_to_next -= 1;
441 
442  b0 = vlib_get_buffer (vm, bi0);
443  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
444 
445  fib_index0 = vec_elt (im->fib_index_by_sw_if_index, sw_if_index0);
446 
447  if (is_tx)
448  vlib_buffer_advance (b0, sizeof (ethernet_header_t));
449 
450  ip0 = vlib_buffer_get_current (b0);
451 
452  c0 = vnet_feature_next_with_data (&next0, b0, sizeof (c0[0]));
453 
454  /* we can't use the default VRF here... */
455  for (i = 0; i < IP_SOURCE_AND_PORT_RANGE_CHECK_N_PROTOCOLS; i++)
456  {
457  ASSERT (c0->fib_index[i]);
458  }
459 
460 
461  if (is_tx)
462  {
463  if (ip0->protocol == IP_PROTOCOL_UDP)
464  fib_index0 =
465  c0->fib_index
467  if (ip0->protocol == IP_PROTOCOL_TCP)
468  fib_index0 =
469  c0->fib_index
471  }
472  else
473  {
474  if (ip0->protocol == IP_PROTOCOL_UDP)
475  fib_index0 =
476  c0->fib_index
478  if (ip0->protocol == IP_PROTOCOL_TCP)
479  fib_index0 =
480  c0->fib_index
482  }
483 
484  if (fib_index0 != ~0)
485  {
486  lb_index0 = ip4_fib_forwarding_lookup (fib_index0,
487  &ip0->src_address);
488 
489  dpo =
491 
492  if (ppr_dpo_type == dpo->dpoi_type)
493  {
494  ppr_dpo0 = protocol_port_range_dpo_get (dpo->dpoi_index);
495  }
496  /*
497  * else the lookup hit an enty that was no inserted
498  * by this range checker, which is the default route
499  */
500  }
501  /*
502  * $$$ which (src,dst) categories should we always pass?
503  */
504  pass0 = 0;
505  pass0 |= ip4_address_is_multicast (&ip0->src_address);
506  pass0 |=
507  ip0->src_address.as_u32 == clib_host_to_net_u32 (0xFFFFFFFF);
508  pass0 |= (ip0->protocol != IP_PROTOCOL_UDP)
509  && (ip0->protocol != IP_PROTOCOL_TCP);
510 
511  save_next0 = next0;
512  udp0 = ip4_next_header (ip0);
513 
514  if (PREDICT_TRUE (pass0 == 0))
515  {
516  good_packets++;
518  (ppr_dpo0, clib_net_to_host_u16 (udp0->dst_port), next0);
519  good_packets -= (save_next0 != next0);
520  b0->error = error_node->errors
521  [IP4_SOURCE_AND_PORT_RANGE_CHECK_ERROR_CHECK_FAIL];
522  }
523 
525  && (b0->flags & VLIB_BUFFER_IS_TRACED)))
526  {
528  vlib_add_trace (vm, node, b0, sizeof (*t));
529  t->pass = next0 == save_next0;
530  t->bypass = pass0;
531  t->fib_index = fib_index0;
532  t->src_addr.as_u32 = ip0->src_address.as_u32;
533  t->port = (pass0 == 0) ?
534  clib_net_to_host_u16 (udp0->dst_port) : 0;
535  t->is_tcp = ip0->protocol == IP_PROTOCOL_TCP;
536  }
537 
538  if (is_tx)
539  vlib_buffer_advance (b0, -sizeof (ethernet_header_t));
540 
541  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
542  to_next, n_left_to_next,
543  bi0, next0);
544  }
545 
546  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
547  }
548 
549  if (is_tx)
551  IP4_SOURCE_AND_PORT_RANGE_CHECK_ERROR_CHECK_OK,
552  good_packets);
553  else
555  IP4_SOURCE_AND_PORT_RANGE_CHECK_ERROR_CHECK_OK,
556  good_packets);
557  return frame->n_vectors;
558 }
559 
560 static uword
562  vlib_node_runtime_t * node,
563  vlib_frame_t * frame)
564 {
565  return ip4_source_and_port_range_check_inline (vm, node, frame,
566  0 /* !is_tx */ );
567 }
568 
569 static uword
571  vlib_node_runtime_t * node,
572  vlib_frame_t * frame)
573 {
574  return ip4_source_and_port_range_check_inline (vm, node, frame,
575  1 /* is_tx */ );
576 }
577 
578 /* Note: Calling same function for both RX and TX nodes
579  as always checking dst_port, although
580  if this changes can easily make new function
581 */
582 
583 /* *INDENT-OFF* */
586  .name = "ip4-source-and-port-range-check-rx",
587  .vector_size = sizeof (u32),
588 
591 
593  .next_nodes = {
595  },
596 
597  .format_buffer = format_ip4_header,
599 };
600 /* *INDENT-ON* */
601 
602 /* *INDENT-OFF* */
605  .name = "ip4-source-and-port-range-check-tx",
606  .vector_size = sizeof (u32),
607 
610 
612  .next_nodes = {
614  },
615 
616  .format_buffer = format_ip4_header,
618 };
619 /* *INDENT-ON* */
620 
621 int
623  u32 * fib_index,
624  u32 sw_if_index, u32 is_add)
625 {
627  int rv = 0;
628  int i;
629 
630  for (i = 0; i < IP_SOURCE_AND_PORT_RANGE_CHECK_N_PROTOCOLS; i++)
631  {
632  config.fib_index[i] = fib_index[i];
633  }
634 
635  /* For OUT we are in the RX path */
636  if ((fib_index[IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_TCP_OUT] != ~0) ||
638  {
639  vnet_feature_enable_disable ("ip4-unicast",
640  "ip4-source-and-port-range-check-rx",
641  sw_if_index, is_add, &config,
642  sizeof (config));
643  }
644 
645  /* For IN we are in the TX path */
646  if ((fib_index[IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_TCP_IN] != ~0) ||
648  {
649  vnet_feature_enable_disable ("ip4-output",
650  "ip4-source-and-port-range-check-tx",
651  sw_if_index, is_add, &config,
652  sizeof (config));
653  }
654  return rv;
655 }
656 
657 static clib_error_t *
659  unformat_input_t * input,
660  vlib_cli_command_t * cmd)
661 {
662  vnet_main_t *vnm = vnet_get_main ();
663  ip4_main_t *im = &ip4_main;
664  clib_error_t *error = 0;
665  u8 is_add = 1;
666  u32 sw_if_index = ~0;
669  int vrf_set = 0;
670  uword *p;
671  int rv = 0;
672  int i;
673 
674  sw_if_index = ~0;
675  for (i = 0; i < IP_SOURCE_AND_PORT_RANGE_CHECK_N_PROTOCOLS; i++)
676  {
677  fib_index[i] = ~0;
678  vrf_id[i] = ~0;
679  }
680 
682  {
683  if (unformat (input, "%U", unformat_vnet_sw_interface, vnm,
684  &sw_if_index))
685  ;
686  else
687  if (unformat
688  (input, "tcp-out-vrf %d",
690  vrf_set = 1;
691  else
692  if (unformat
693  (input, "udp-out-vrf %d",
695  vrf_set = 1;
696  else
697  if (unformat
698  (input, "tcp-in-vrf %d",
700  vrf_set = 1;
701  else
702  if (unformat
703  (input, "udp-in-vrf %d",
705  vrf_set = 1;
706  else if (unformat (input, "del"))
707  is_add = 0;
708  else
709  break;
710  }
711 
712  if (sw_if_index == ~0)
713  return clib_error_return (0, "Interface required but not specified");
714 
715  if (!vrf_set)
716  return clib_error_return (0,
717  "TCP or UDP VRF ID required but not specified");
718 
719  for (i = 0; i < IP_SOURCE_AND_PORT_RANGE_CHECK_N_PROTOCOLS; i++)
720  {
721 
722  if (vrf_id[i] == 0)
723  return clib_error_return (0,
724  "TCP, UDP VRF ID should not be 0 (default). Should be distinct VRF for this purpose. ");
725 
726  if (vrf_id[i] != ~0)
727  {
728  p = hash_get (im->fib_index_by_table_id, vrf_id[i]);
729 
730  if (p == 0)
731  return clib_error_return (0, "Invalid VRF ID %d", vrf_id[i]);
732 
733  fib_index[i] = p[0];
734  }
735  }
736  rv =
737  set_ip_source_and_port_range_check (vm, fib_index, sw_if_index, is_add);
738 
739  switch (rv)
740  {
741  case 0:
742  break;
743 
744  default:
745  return clib_error_return
746  (0,
747  "set source and port-range on interface returned an unexpected value: %d",
748  rv);
749  }
750  return error;
751 }
752 
753 /*?
754  * Add the 'ip4-source-and-port-range-check-rx' or
755  * 'ip4-source-and-port-range-check-tx' graph node for a given
756  * interface. 'tcp-out-vrf' and 'udp-out-vrf' will add to
757  * the RX path. 'tcp-in-vrf' and 'udp-in-vrf' will add to
758  * the TX path. A graph node will be inserted into the chain when
759  * the range check is added to the first interface. It will not
760  * be removed from when range check is removed from the last
761  * interface.
762  *
763  * By adding the range check graph node to the interface, incoming
764  * or outgoing TCP/UDP packets will be validated using the
765  * provided IPv4 FIB table (VRF).
766  *
767  * @note 'ip4-source-and-port-range-check-rx' and
768  * 'ip4-source-and-port-range-check-tx' strings are too long, so
769  * they are truncated on the 'show vlib graph' output.
770  *
771  * @todo This content needs to be validated and potentially more detail added.
772  *
773  * @cliexpar
774  * @parblock
775  * Example of graph node before range checking is enabled:
776  * @cliexstart{show vlib graph ip4-source-and-port-range-check-tx}
777  * Name Next Previous
778  * ip4-source-and-port-range- ip4-drop [0]
779  * @cliexend
780  *
781  * Example of how to enable range checking on TX:
782  * @cliexcmd{set interface ip source-and-port-range-check GigabitEthernet2/0/0 udp-in-vrf 7}
783  *
784  * Example of graph node after range checking is enabled:
785  * @cliexstart{show vlib graph ip4-source-and-port-range-check-tx}
786  * Name Next Previous
787  * ip4-source-and-port-range- ip4-drop [0] ip4-rewrite
788  * interface-output [1]
789  * @cliexend
790  *
791  * Example of how to display the features enabed on an interface:
792  * @cliexstart{show ip interface features GigabitEthernet2/0/0}
793  * IP feature paths configured on GigabitEthernet2/0/0...
794  *
795  * ipv4 unicast:
796  * ip4-source-and-port-range-check-rx
797  * ip4-lookup
798  *
799  * ipv4 multicast:
800  * ip4-lookup-multicast
801  *
802  * ipv4 multicast:
803  * interface-output
804  *
805  * ipv6 unicast:
806  * ip6-lookup
807  *
808  * ipv6 multicast:
809  * ip6-lookup
810  *
811  * ipv6 multicast:
812  * interface-output
813  * @cliexend
814  * @endparblock
815 ?*/
816 /* *INDENT-OFF* */
817 VLIB_CLI_COMMAND (set_interface_ip_source_and_port_range_check_command, static) = {
818  .path = "set interface ip source-and-port-range-check",
820  .short_help = "set interface ip source-and-port-range-check <interface> [tcp-out-vrf <table-id>] [udp-out-vrf <table-id>] [tcp-in-vrf <table-id>] [udp-in-vrf <table-id>] [del]",
821 };
822 /* *INDENT-ON* */
823 
824 static u8 *
825 format_ppr_dpo (u8 * s, va_list * args)
826 {
827  index_t index = va_arg (*args, index_t);
828  CLIB_UNUSED (u32 indent) = va_arg (*args, u32);
829 
830  protocol_port_range_dpo_t *ppr_dpo;
831  int i, j;
832  int printed = 0;
833 
834  ppr_dpo = protocol_port_range_dpo_get (index);
835 
836  s = format (s, "allow ");
837 
838  for (i = 0; i < ppr_dpo->n_used_blocks; i++)
839  {
840  for (j = 0; j < 8; j++)
841  {
842  if (ppr_dpo->blocks[i].low.as_u16[j])
843  {
844  if (printed)
845  s = format (s, ", ");
846  if (ppr_dpo->blocks[i].hi.as_u16[j] >
847  (ppr_dpo->blocks[i].low.as_u16[j] + 1))
848  s =
849  format (s, "%d-%d", (u32) ppr_dpo->blocks[i].low.as_u16[j],
850  (u32) ppr_dpo->blocks[i].hi.as_u16[j] - 1);
851  else
852  s = format (s, "%d", ppr_dpo->blocks[i].low.as_u16[j]);
853  printed = 1;
854  }
855  }
856  }
857  return s;
858 }
859 
860 static void
862 {
863 }
864 
865 static void
867 {
868 }
869 
870 const static dpo_vft_t ppr_vft = {
872  .dv_unlock = ppr_dpo_unlock,
873  .dv_format = format_ppr_dpo,
874 };
875 
876 const static char *const ppr_ip4_nodes[] = {
877  "ip4-source-and-port-range-check-rx",
878  NULL,
879 };
880 
881 const static char *const *const ppr_nodes[DPO_PROTO_NUM] = {
883 };
884 
885 clib_error_t *
887 {
889 
890  srm->vlib_main = vm;
891  srm->vnet_main = vnet_get_main ();
892 
894 
895  return 0;
896 }
897 
899 
902 {
903  protocol_port_range_dpo_t *ppr_dpo;
904 
905  pool_get_aligned (ppr_dpo_pool, ppr_dpo, CLIB_CACHE_LINE_BYTES);
906  clib_memset (ppr_dpo, 0, sizeof (*ppr_dpo));
907 
909 
910  return (ppr_dpo);
911 }
912 
913 
914 static int
917  u32 length, u16 * low_ports, u16 * high_ports)
918 {
919  protocol_port_range_dpo_t *ppr_dpo;
920  dpo_id_t dpop = DPO_INVALID;
921  int i, j, k;
922 
923  fib_node_index_t fei;
924  fib_prefix_t pfx = {
926  .fp_len = length,
927  .fp_addr = {
928  .ip4 = *address,
929  },
930  };
931 
932  /*
933  * check to see if we have already sourced this prefix
934  */
935  fei = fib_table_lookup_exact_match (fib_index, &pfx);
936 
937  if (FIB_NODE_INDEX_INVALID == fei)
938  {
939  /*
940  * this is a first time add for this prefix.
941  */
942  ppr_dpo = protocol_port_range_dpo_alloc ();
943  }
944  else
945  {
946  /*
947  * the prefix is already there.
948  * check it was sourced by us, and if so get the ragne DPO from it.
949  */
950  dpo_id_t dpo = DPO_INVALID;
951  const dpo_id_t *bucket;
952 
954  {
955  /*
956  * there is existing state. we'll want to add the new ranges to it
957  */
958  bucket =
960  ppr_dpo = protocol_port_range_dpo_get (bucket->dpoi_index);
961  dpo_reset (&dpo);
962  }
963  else
964  {
965  /*
966  * there is no PPR state associated with this prefix,
967  * so we'll need a new DPO
968  */
969  ppr_dpo = protocol_port_range_dpo_alloc ();
970  }
971  }
972 
973  if (vec_len (low_ports) > ppr_dpo->n_free_ranges)
974  return VNET_API_ERROR_EXCEEDED_NUMBER_OF_RANGES_CAPACITY;
975 
976  j = k = 0;
977 
978  for (i = 0; i < vec_len (low_ports); i++)
979  {
980  for (; j < N_BLOCKS_PER_DPO; j++)
981  {
982  for (; k < 8; k++)
983  {
984  if (ppr_dpo->blocks[j].low.as_u16[k] == 0)
985  {
986  ppr_dpo->blocks[j].low.as_u16[k] = low_ports[i];
987  ppr_dpo->blocks[j].hi.as_u16[k] = high_ports[i];
988  goto doublebreak;
989  }
990  }
991  }
992  doublebreak:;
993  }
994  ppr_dpo->n_used_blocks = j + 1;
995 
996  /*
997  * add or update the entry in the FIB
998  */
999  dpo_set (&dpop, ppr_dpo_type, DPO_PROTO_IP4, (ppr_dpo - ppr_dpo_pool));
1000 
1001  if (FIB_NODE_INDEX_INVALID == fei)
1002  {
1004  &pfx,
1006  FIB_ENTRY_FLAG_NONE, &dpop);
1007  }
1008  else
1009  {
1012  FIB_ENTRY_FLAG_NONE, &dpop);
1013  }
1014 
1015  return 0;
1016 }
1017 
1018 static int
1021  u32 length, u16 * low_ports, u16 * high_ports)
1022 {
1023  protocol_port_range_dpo_t *ppr_dpo;
1024  fib_node_index_t fei;
1025  int i, j, k;
1026 
1027  fib_prefix_t pfx = {
1029  .fp_len = length,
1030  .fp_addr = {
1031  .ip4 = *address,
1032  },
1033  };
1034 
1035  /*
1036  * check to see if we have sourced this prefix
1037  */
1038  fei = fib_table_lookup_exact_match (fib_index, &pfx);
1039 
1040  if (FIB_NODE_INDEX_INVALID == fei)
1041  {
1042  /*
1043  * not one of ours
1044  */
1045  return VNET_API_ERROR_INCORRECT_ADJACENCY_TYPE;
1046  }
1047  else
1048  {
1049  /*
1050  * the prefix is already there.
1051  * check it was sourced by us
1052  */
1053  dpo_id_t dpo = DPO_INVALID;
1054  const dpo_id_t *bucket;
1055 
1057  {
1058  /*
1059  * there is existing state. we'll want to add the new ranges to it
1060  */
1061  bucket =
1063  ppr_dpo = protocol_port_range_dpo_get (bucket->dpoi_index);
1064  dpo_reset (&dpo);
1065  }
1066  else
1067  {
1068  /*
1069  * not one of ours
1070  */
1071  return VNET_API_ERROR_INCORRECT_ADJACENCY_TYPE;
1072  }
1073  }
1074 
1075  for (i = 0; i < vec_len (low_ports); i++)
1076  {
1077  for (j = 0; j < N_BLOCKS_PER_DPO; j++)
1078  {
1079  for (k = 0; k < 8; k++)
1080  {
1081  if (low_ports[i] == ppr_dpo->blocks[j].low.as_u16[k] &&
1082  high_ports[i] == ppr_dpo->blocks[j].hi.as_u16[k])
1083  {
1084  ppr_dpo->blocks[j].low.as_u16[k] =
1085  ppr_dpo->blocks[j].hi.as_u16[k] = 0;
1086  goto doublebreak;
1087  }
1088  }
1089  }
1090  doublebreak:;
1091  }
1092 
1093  ppr_dpo->n_free_ranges = 0;
1094 
1095  /* Have we deleted all ranges yet? */
1096  for (i = 0; i < N_BLOCKS_PER_DPO; i++)
1097  {
1098  for (j = 0; j < 8; j++)
1099  {
1100  if (ppr_dpo->blocks[j].low.as_u16[i] == 0)
1101  ppr_dpo->n_free_ranges++;
1102  }
1103  }
1104 
1105  if (N_PORT_RANGES_PER_DPO == ppr_dpo->n_free_ranges)
1106  {
1107  /* Yes, lose the adjacency... */
1109  }
1110  else
1111  {
1112  /*
1113  * compact the ranges down to a contiguous block
1114  */
1115  // FIXME. TODO.
1116  }
1117 
1118  return 0;
1119 }
1120 
1121 // This will be moved to another file and implemented post API freeze.
1122 int
1124  u32 length,
1125  u32 vrf_id,
1126  u16 * low_ports,
1127  u16 * high_ports, int is_add)
1128 {
1129  u32 fib_index;
1130 
1131  fib_index = fib_table_find (FIB_PROTOCOL_IP4, vrf_id);
1132 
1133  ASSERT (~0 != fib_index);
1134 
1136 
1137  return 0;
1138 }
1139 
1140 int
1142  u32 length,
1143  u32 vrf_id,
1144  u16 * low_ports,
1145  u16 * high_ports, int is_add)
1146 {
1147  u32 fib_index;
1148 
1151 
1152  if (is_add == 0)
1153  {
1154  remove_port_range_adjacency (fib_index, address, length,
1155  low_ports, high_ports);
1156  }
1157  else
1158  {
1159  add_port_range_adjacency (fib_index, address, length,
1160  low_ports, high_ports);
1161  }
1162 
1163  return 0;
1164 }
1165 
1166 static clib_error_t *
1168  unformat_input_t * input,
1169  vlib_cli_command_t * cmd)
1170 {
1171  u16 *low_ports = 0;
1172  u16 *high_ports = 0;
1173  u16 this_low;
1174  u16 this_hi;
1175  ip4_address_t ip4_addr;
1176  ip6_address_t ip6_addr; //This function will be moved to generic impl when v6 done.
1177  u32 length;
1178  u32 tmp, tmp2;
1179  u32 vrf_id = ~0;
1180  int is_add = 1, ip_ver = ~0;
1181  int rv;
1182 
1183 
1184  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1185  {
1186  if (unformat (input, "%U/%d", unformat_ip4_address, &ip4_addr, &length))
1187  ip_ver = 4;
1188  else
1189  if (unformat
1190  (input, "%U/%d", unformat_ip6_address, &ip6_addr, &length))
1191  ip_ver = 6;
1192  else if (unformat (input, "vrf %d", &vrf_id))
1193  ;
1194  else if (unformat (input, "del"))
1195  is_add = 0;
1196  else if (unformat (input, "port %d", &tmp))
1197  {
1198  if (tmp == 0 || tmp > 65535)
1199  return clib_error_return (0, "port %d out of range", tmp);
1200  this_low = tmp;
1201  this_hi = this_low + 1;
1202  vec_add1 (low_ports, this_low);
1203  vec_add1 (high_ports, this_hi);
1204  }
1205  else if (unformat (input, "range %d - %d", &tmp, &tmp2))
1206  {
1207  if (tmp > tmp2)
1208  return clib_error_return (0, "ports %d and %d out of order",
1209  tmp, tmp2);
1210  if (tmp == 0 || tmp > 65535)
1211  return clib_error_return (0, "low port %d out of range", tmp);
1212  if (tmp2 == 0 || tmp2 > 65535)
1213  return clib_error_return (0, "high port %d out of range", tmp2);
1214  this_low = tmp;
1215  this_hi = tmp2 + 1;
1216  vec_add1 (low_ports, this_low);
1217  vec_add1 (high_ports, this_hi);
1218  }
1219  else
1220  break;
1221  }
1222 
1223  if (ip_ver == ~0)
1224  return clib_error_return (0, " <address>/<mask> not specified");
1225 
1226  if (vrf_id == ~0)
1227  return clib_error_return (0, " VRF ID required, not specified");
1228 
1229  if (vec_len (low_ports) == 0)
1230  return clib_error_return (0,
1231  " Both VRF ID and range/port must be set for a protocol.");
1232 
1233  if (vrf_id == 0)
1234  return clib_error_return (0, " VRF ID can not be 0 (default).");
1235 
1236 
1237  if (ip_ver == 4)
1239  (&ip4_addr, length, vrf_id, low_ports, high_ports, is_add);
1240  else
1241  return clib_error_return (0, " IPv6 in subsequent patch");
1242 
1243  switch (rv)
1244  {
1245  case 0:
1246  break;
1247 
1248  case VNET_API_ERROR_INCORRECT_ADJACENCY_TYPE:
1249  return clib_error_return
1250  (0, " Incorrect adjacency for add/del operation");
1251 
1252  case VNET_API_ERROR_EXCEEDED_NUMBER_OF_PORTS_CAPACITY:
1253  return clib_error_return (0, " Too many ports in add/del operation");
1254 
1255  case VNET_API_ERROR_EXCEEDED_NUMBER_OF_RANGES_CAPACITY:
1256  return clib_error_return
1257  (0, " Too many ranges requested for add operation");
1258 
1259  default:
1260  return clib_error_return (0, " returned an unexpected value: %d", rv);
1261  }
1262 
1263  return 0;
1264 }
1265 
1266 /*?
1267  * This command adds an IP Subnet and range of ports to be validated
1268  * by an IP FIB table (VRF).
1269  *
1270  * @todo This is incomplete. This needs a detailed description and a
1271  * practical example.
1272  *
1273  * @cliexpar
1274  * Example of how to add an IPv4 subnet and single port to an IPv4 FIB table:
1275  * @cliexcmd{set ip source-and-port-range-check vrf 7 172.16.1.0/24 port 23}
1276  * Example of how to add an IPv4 subnet and range of ports to an IPv4 FIB table:
1277  * @cliexcmd{set ip source-and-port-range-check vrf 7 172.16.1.0/24 range 23 - 100}
1278  * Example of how to delete an IPv4 subnet and single port from an IPv4 FIB table:
1279  * @cliexcmd{set ip source-and-port-range-check vrf 7 172.16.1.0/24 port 23 del}
1280  * Example of how to delete an IPv4 subnet and range of ports from an IPv4 FIB table:
1281  * @cliexcmd{set ip source-and-port-range-check vrf 7 172.16.1.0/24 range 23 - 100 del}
1282 ?*/
1283 /* *INDENT-OFF* */
1284 VLIB_CLI_COMMAND (ip_source_and_port_range_check_command, static) = {
1285  .path = "set ip source-and-port-range-check",
1287  .short_help =
1288  "set ip source-and-port-range-check vrf <table-id> <ip-addr>/<mask> {port nn | range <nn> - <nn>} [del]",
1289 };
1290 /* *INDENT-ON* */
1291 
1292 
1293 static clib_error_t *
1295  unformat_input_t * input,
1296  vlib_cli_command_t * cmd)
1297 {
1298  protocol_port_range_dpo_t *ppr_dpo;
1299  u32 fib_index;
1300  u8 addr_set = 0;
1301  u32 vrf_id = ~0;
1302  int rv, i, j;
1303  u32 port = 0;
1304  fib_prefix_t pfx = {
1306  .fp_len = 32,
1307  };
1308 
1309  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1310  {
1311  if (unformat (input, "%U", unformat_ip4_address, &pfx.fp_addr.ip4))
1312  addr_set = 1;
1313  else if (unformat (input, "vrf %d", &vrf_id))
1314  ;
1315  else if (unformat (input, "port %d", &port))
1316  ;
1317  else
1318  break;
1319  }
1320 
1321  if (addr_set == 0)
1322  return clib_error_return (0, "<address> not specified");
1323 
1324  if (vrf_id == ~0)
1325  return clib_error_return (0, "VRF ID required, not specified");
1326 
1327  fib_index = fib_table_find (FIB_PROTOCOL_IP4, vrf_id);
1328  if (~0 == fib_index)
1329  return clib_error_return (0, "VRF %d not found", vrf_id);
1330 
1331  /*
1332  * find the longest prefix match on the address requested,
1333  * check it was sourced by us
1334  */
1335  dpo_id_t dpo = DPO_INVALID;
1336  const dpo_id_t *bucket;
1337 
1338  if (!fib_entry_get_dpo_for_source (fib_table_lookup (fib_index, &pfx),
1339  FIB_SOURCE_SPECIAL, &dpo))
1340  {
1341  /*
1342  * not one of ours
1343  */
1344  vlib_cli_output (vm, "%U: src address drop", format_ip4_address,
1345  &pfx.fp_addr.ip4);
1346  return 0;
1347  }
1348 
1350  ppr_dpo = protocol_port_range_dpo_get (bucket->dpoi_index);
1351  dpo_reset (&dpo);
1352 
1353  if (port)
1354  {
1355  rv = check_adj_port_range_x1 (ppr_dpo, (u16) port, 1234);
1356  if (rv == 1234)
1357  vlib_cli_output (vm, "%U port %d PASS", format_ip4_address,
1358  &pfx.fp_addr.ip4, port);
1359  else
1360  vlib_cli_output (vm, "%U port %d FAIL", format_ip4_address,
1361  &pfx.fp_addr.ip4, port);
1362  return 0;
1363  }
1364  else
1365  {
1366  u8 *s;
1367 
1368  s = format (0, "%U: ", format_ip4_address, &pfx.fp_addr.ip4);
1369 
1370  for (i = 0; i < N_BLOCKS_PER_DPO; i++)
1371  {
1372  for (j = 0; j < 8; j++)
1373  {
1374  if (ppr_dpo->blocks[i].low.as_u16[j])
1375  s = format (s, "%d - %d ",
1376  (u32) ppr_dpo->blocks[i].low.as_u16[j],
1377  (u32) ppr_dpo->blocks[i].hi.as_u16[j]);
1378  }
1379  }
1380  vlib_cli_output (vm, "%s", s);
1381  vec_free (s);
1382  }
1383 
1384  return 0;
1385 }
1386 
1387 /*?
1388  * Display the range of ports being validated by an IPv4 FIB for a given
1389  * IP or subnet, or test if a given IP and port are being validated.
1390  *
1391  * @todo This is incomplete. This needs a detailed description and a
1392  * practical example.
1393  *
1394  * @cliexpar
1395  * Example of how to display the set of ports being validated for a given
1396  * IPv4 subnet:
1397  * @cliexstart{show ip source-and-port-range-check vrf 7 172.16.2.0}
1398  * 172.16.2.0: 23 - 101
1399  * @cliexend
1400  * Example of how to test to determine of a given Pv4 address and port
1401  * are being validated:
1402  * @cliexstart{show ip source-and-port-range-check vrf 7 172.16.2.2 port 23}
1403  * 172.16.2.2 port 23 PASS
1404  * @cliexend
1405  * @cliexstart{show ip source-and-port-range-check vrf 7 172.16.2.2 port 250}
1406  * 172.16.2.2 port 250 FAIL
1407  * @cliexend
1408  ?*/
1409 /* *INDENT-OFF* */
1410 VLIB_CLI_COMMAND (show_source_and_port_range_check, static) = {
1411  .path = "show ip source-and-port-range-check",
1413  .short_help =
1414  "show ip source-and-port-range-check vrf <table-id> <ip-addr> [port <n>]",
1415 };
1416 /* *INDENT-ON* */
1417 
1418 /*
1419  * fd.io coding-style-patch-verification: ON
1420  *
1421  * Local Variables:
1422  * eval: (c-set-style "gnu")
1423  * End:
1424  */
static clib_error_t * ip_source_and_port_range_check_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
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
fib_protocol_t fp_proto
protocol type
Definition: fib_types.h:212
static u8 * format_ip4_source_and_port_range_check_trace(u8 *s, va_list *va)
dpo_lock_fn_t dv_lock
A reference counting lock function.
Definition: dpo.h:406
typedef address
Definition: ip_types.api:83
static u8 * format_ppr_dpo(u8 *s, va_list *args)
ip4_source_and_port_range_check_error_t
#define CLIB_UNUSED(x)
Definition: clib.h:83
A virtual function table regisitered for a DPO type.
Definition: dpo.h:401
fib_node_index_t fib_table_lookup_exact_match(u32 fib_index, const fib_prefix_t *prefix)
Perfom an exact match in the non-forwarding table.
Definition: fib_table.c:95
ip4_address_t src_address
Definition: ip4_packet.h:170
vnet_main_t * vnet_get_main(void)
Definition: misc.c:46
format_function_t format_ip4_header
Definition: format.h:83
#define PREDICT_TRUE(x)
Definition: clib.h:113
vlib_node_registration_t ip4_source_port_and_range_check_rx
(constructor) VLIB_REGISTER_NODE (ip4_source_port_and_range_check_rx)
#define foreach_ip4_source_and_port_range_check_error
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
#define VLIB_BUFFER_PRE_DATA_SIZE
Definition: buffer.h:51
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
static uword ip4_source_and_port_range_check_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, int is_tx)
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:522
int i
u32 * fib_index_by_sw_if_index
Table index indexed by software interface.
Definition: ip4.h:121
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
unformat_function_t unformat_vnet_sw_interface
static uword ip4_address_is_multicast(const ip4_address_t *a)
Definition: ip4_packet.h:318
static const char *const ppr_ip4_nodes[]
vlib_error_t * errors
Vector of errors for this node.
Definition: node.h:470
unsigned char u8
Definition: types.h:56
static void ppr_dpo_lock(dpo_id_t *dpo)
static u32 u16x8_zero_byte_mask(u16x8 x)
Definition: vector_sse42.h:524
format_function_t format_ip4_address
Definition: format.h:75
void fib_entry_special_update(fib_node_index_t fib_entry_index, fib_source_t source, fib_entry_flag_t flags, const dpo_id_t *dpo)
Definition: fib_entry.c:902
enum dpo_type_t_ dpo_type_t
Common types of data-path objects New types can be dynamically added using dpo_register_new_type() ...
unformat_function_t unformat_ip4_address
Definition: format.h:70
vl_api_interface_index_t sw_if_index
Definition: gre.api:50
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:173
void fib_table_entry_special_remove(u32 fib_index, const fib_prefix_t *prefix, fib_source_t source)
Remove a &#39;special&#39; entry from the FIB.
Definition: fib_table.c:407
#define always_inline
Definition: clib.h:99
vlib_node_registration_t ip4_source_port_and_range_check_tx
(constructor) VLIB_REGISTER_NODE (ip4_source_port_and_range_check_tx)
Aggregate type for a prefix.
Definition: fib_types.h:203
protocol_port_range_dpo_t * protocol_port_range_dpo_alloc(void)
#define clib_error_return(e, args...)
Definition: error.h:99
static u32 check_adj_port_range_x1(const protocol_port_range_dpo_t *ppr_dpo, u16 dst_port, u32 next)
static void * ip4_next_header(ip4_header_t *i)
Definition: ip4_packet.h:241
static clib_error_t * set_ip_source_and_port_range_check_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
unsigned int u32
Definition: types.h:88
u32 fib_table_find(fib_protocol_t proto, u32 table_id)
Get the index of the FIB for a Table-ID.
Definition: fib_table.c:1080
ip4_source_and_port_range_check_next_t
fib_node_index_t fib_table_lookup(u32 fib_index, const fib_prefix_t *prefix)
Perfom a longest prefix match in the non-forwarding table.
Definition: fib_table.c:66
dpo_type_t dpo_register_new_type(const dpo_vft_t *vft, const char *const *const *nodes)
Create and register a new DPO type.
Definition: dpo.c:342
Definition: fib_entry.h:281
const int fib_entry_get_dpo_for_source(fib_node_index_t fib_entry_index, fib_source_t source, dpo_id_t *dpo)
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:136
The identity of a DPO is a combination of its type and its instance number/index of objects of that t...
Definition: dpo.h:170
static_always_inline void * vnet_feature_next_with_data(u32 *next0, vlib_buffer_t *b0, u32 n_data_bytes)
Definition: feature.h:289
#define hash_get(h, key)
Definition: hash.h:249
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:514
uword * fib_index_by_table_id
Hash table mapping table id to fib index.
Definition: ip4.h:131
ip46_address_t fp_addr
The address type is not deriveable from the fp_addr member.
Definition: fib_types.h:226
dpo_type_t dpoi_type
the type
Definition: dpo.h:174
static clib_error_t * show_source_and_port_range_check_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
static const dpo_id_t * load_balance_get_bucket_i(const load_balance_t *lb, u32 bucket)
Definition: load_balance.h:229
struct _unformat_input_t unformat_input_t
unsigned short u16
Definition: types.h:57
The object that is in the data-path to perform the check.
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:229
static int remove_port_range_adjacency(u32 fib_index, ip4_address_t *address, u32 length, u16 *low_ports, u16 *high_ports)
u16 n_used_blocks
The number of blocks from the &#39;block&#39; array below that have ranges configured.
#define PREDICT_FALSE(x)
Definition: clib.h:112
u16 port
Definition: punt.api:40
#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
void fib_table_unlock(u32 fib_index, fib_protocol_t proto, fib_source_t source)
Take a reference counting lock on the table.
Definition: fib_table.c:1253
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1150
unformat_function_t unformat_ip6_address
Definition: format.h:91
#define pool_get_aligned(P, E, A)
Allocate an object E from a pool P with alignment A.
Definition: pool.h:230
u16 n_free_ranges
The total number of free ranges from all blocks.
#define u16x8_sub_saturate(a, b)
Definition: vector_neon.h:21
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
#define UNFORMAT_END_OF_INPUT
Definition: format.h:145
u16 n_vectors
Definition: node.h:397
vlib_main_t * vm
Definition: buffer.c:323
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
u32 fib_node_index_t
A typedef of a node index.
Definition: fib_types.h:30
#define ARRAY_LEN(x)
Definition: clib.h:63
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:456
#define N_BLOCKS_PER_DPO
void dpo_set(dpo_id_t *dpo, dpo_type_t type, dpo_proto_t proto, index_t index)
Set/create a DPO ID The DPO will be locked.
Definition: dpo.c:186
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:161
protocol_port_range_t blocks[N_BLOCKS_PER_DPO]
the fixed size array of ranges
fib_node_index_t fib_table_entry_special_dpo_add(u32 fib_index, const fib_prefix_t *prefix, fib_source_t source, fib_entry_flag_t flags, const dpo_id_t *dpo)
Add a &#39;special&#39; entry to the FIB that links to the DPO passed A special entry is an entry that the FI...
Definition: fib_table.c:307
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:515
#define ASSERT(truth)
static const char *const *const ppr_nodes[DPO_PROTO_NUM]
source_range_check_main_t source_range_check_main
static load_balance_t * load_balance_get(index_t lbi)
Definition: load_balance.h:220
IPv4 main type.
Definition: ip4.h:105
Classify.
Definition: fib_entry.h:49
u32 fib_table_find_or_create_and_lock(fib_protocol_t proto, u32 table_id, fib_source_t src)
Get the index of the FIB for a Table-ID.
Definition: fib_table.c:1139
static index_t ip4_fib_forwarding_lookup(u32 fib_index, const ip4_address_t *addr)
Definition: ip4_fib.h:160
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:248
#define N_PORT_RANGES_PER_DPO
The number of supported ranges per-data path object.
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.
struct _vlib_node_registration vlib_node_registration_t
#define DPO_PROTO_NUM
Definition: dpo.h:70
index_t dpoi_index
the index of objects of that type
Definition: dpo.h:186
#define FIB_NODE_INDEX_INVALID
Definition: fib_types.h:31
static int add_port_range_adjacency(u32 fib_index, ip4_address_t *address, u32 length, u16 *low_ports, u16 *high_ports)
clib_error_t * ip4_source_and_port_range_check_init(vlib_main_t *vm)
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
static void ppr_dpo_unlock(dpo_id_t *dpo)
VLIB buffer representation.
Definition: buffer.h:102
u64 uword
Definition: types.h:112
static protocol_port_range_dpo_t * protocol_port_range_dpo_get(index_t index)
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:244
typedef key
Definition: ipsec.api:247
#define DPO_INVALID
An initialiser for DPOs declared on the stack.
Definition: dpo.h:197
int ip4_source_and_port_range_check_add_del(ip4_address_t *address, u32 length, u32 vrf_id, u16 *low_ports, u16 *high_ports, int is_add)
Special sources.
Definition: fib_entry.h:45
#define vnet_buffer(b)
Definition: buffer.h:365
static uword ip4_source_and_port_range_check_tx(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1076
void dpo_reset(dpo_id_t *dpo)
reset a DPO ID The DPO will be unlocked.
Definition: dpo.c:232
u16 flags
Copy of main node flags.
Definition: node.h:509
static dpo_type_t ppr_dpo_type
Dynamically registered DPO type.
u16 dst_port
Definition: udp.api:42
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:302
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
int ip6_source_and_port_range_check_add_del(ip6_address_t *address, u32 length, u32 vrf_id, u16 *low_ports, u16 *high_ports, int is_add)
static char * ip4_source_and_port_range_check_error_strings[]
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:772
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
static uword ip4_source_and_port_range_check_rx(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:978
static protocol_port_range_dpo_t * ppr_dpo_pool
The pool of range chack DPOs.
Definition: defs.h:46
int vnet_feature_enable_disable(const char *arc_name, const char *node_name, u32 sw_if_index, int enable_disable, void *feature_config, u32 n_feature_config_bytes)
Definition: feature.c:275
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:171
u32 fib_index[IP_SOURCE_AND_PORT_RANGE_CHECK_N_PROTOCOLS]
int set_ip_source_and_port_range_check(vlib_main_t *vm, u32 *fib_index, u32 sw_if_index, u32 is_add)