FD.io VPP  v18.07.1-13-g909ba93
Vector Packet Processing
dhcp4_proxy_node.c
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1 /*
2  * proxy_node.c: dhcp proxy node processing
3  *
4  * Copyright (c) 2013 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/dhcp/dhcp_proxy.h>
21 #include <vnet/dhcp/client.h>
22 #include <vnet/fib/ip4_fib.h>
23 
24 static char *dhcp_proxy_error_strings[] = {
25 #define dhcp_proxy_error(n,s) s,
27 #undef dhcp_proxy_error
28 };
29 
30 #define foreach_dhcp_proxy_to_server_input_next \
31  _ (DROP, "error-drop") \
32  _ (LOOKUP, "ip4-lookup") \
33  _ (SEND_TO_CLIENT, "dhcp-proxy-to-client")
34 
35 typedef enum
36 {
37 #define _(s,n) DHCP_PROXY_TO_SERVER_INPUT_NEXT_##s,
39 #undef _
42 
43 typedef struct
44 {
45  /* 0 => to server, 1 => to client */
46  int which;
52 
53 #define VPP_DHCP_OPTION82_SUB1_SIZE 6
54 #define VPP_DHCP_OPTION82_SUB5_SIZE 6
55 #define VPP_DHCP_OPTION82_VSS_SIZE 12
56 #define VPP_DHCP_OPTION82_SIZE (VPP_DHCP_OPTION82_SUB1_SIZE + \
57  VPP_DHCP_OPTION82_SUB5_SIZE + \
58  VPP_DHCP_OPTION82_VSS_SIZE +3)
59 
62 
63 static u8 *
64 format_dhcp_proxy_trace (u8 * s, va_list * args)
65 {
66  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
67  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
68  dhcp_proxy_trace_t *t = va_arg (*args, dhcp_proxy_trace_t *);
69 
70  if (t->which == 0)
71  s = format (s, "DHCP proxy: sent to server %U\n",
73  else
74  s = format (s, "DHCP proxy: broadcast to client from %U\n",
76 
77  if (t->error != (u32) ~ 0)
78  s = format (s, " error: %s\n", dhcp_proxy_error_strings[t->error]);
79 
80  s = format (s, " original_sw_if_index: %d, sw_if_index: %d\n",
82 
83  return s;
84 }
85 
86 static u8 *
88 {
89  dhcp_header_t *h = va_arg (*args, dhcp_header_t *);
90  u32 max_header_bytes = va_arg (*args, u32);
91  u32 header_bytes;
92 
93  header_bytes = sizeof (h[0]);
94  if (max_header_bytes != 0 && header_bytes > max_header_bytes)
95  return format (s, "dhcp header truncated");
96 
97  s = format (s, "DHCP Proxy");
98 
99  return s;
100 }
101 
102 static uword
104  vlib_node_runtime_t * node,
105  vlib_frame_t * from_frame)
106 {
107  u32 n_left_from, next_index, *from, *to_next;
109  from = vlib_frame_vector_args (from_frame);
110  n_left_from = from_frame->n_vectors;
111  u32 pkts_to_server = 0, pkts_to_client = 0, pkts_no_server = 0;
112  u32 pkts_no_interface_address = 0;
113  u32 pkts_too_big = 0;
114  ip4_main_t *im = &ip4_main;
115 
116  next_index = node->cached_next_index;
117 
118  while (n_left_from > 0)
119  {
120  u32 n_left_to_next;
121 
122  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
123 
124  while (n_left_from > 0 && n_left_to_next > 0)
125  {
126  u32 bi0;
127  vlib_buffer_t *b0;
128  udp_header_t *u0;
129  dhcp_header_t *h0;
130  ip4_header_t *ip0;
131  u32 next0;
132  u32 old0, new0;
133  ip_csum_t sum0;
134  u32 error0 = (u32) ~ 0;
135  u32 sw_if_index = 0;
136  u32 original_sw_if_index = 0;
137  u8 *end = NULL;
138  u32 fib_index;
139  dhcp_proxy_t *proxy;
140  dhcp_server_t *server;
141  u32 rx_sw_if_index;
142  dhcp_option_t *o;
143  u32 len = 0;
145  u8 is_discover = 0;
146 
147  bi0 = from[0];
148  from += 1;
149  n_left_from -= 1;
150 
151  b0 = vlib_get_buffer (vm, bi0);
152 
153  h0 = vlib_buffer_get_current (b0);
154 
155  /*
156  * udp_local hands us the DHCP header, need udp hdr,
157  * ip hdr to relay to server
158  */
159  vlib_buffer_advance (b0, -(sizeof (*u0)));
160  u0 = vlib_buffer_get_current (b0);
161 
162  /* This blows. Return traffic has src_port = 67, dst_port = 67 */
163  if (u0->src_port ==
164  clib_net_to_host_u16 (UDP_DST_PORT_dhcp_to_server))
165  {
166  vlib_buffer_advance (b0, sizeof (*u0));
167  next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_SEND_TO_CLIENT;
168  error0 = 0;
169  pkts_to_client++;
170  goto do_enqueue;
171  }
172 
173  rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
174 
175  fib_index = im->fib_index_by_sw_if_index[rx_sw_if_index];
176  proxy = dhcp_get_proxy (dpm, fib_index, FIB_PROTOCOL_IP4);
177 
178  if (PREDICT_FALSE (NULL == proxy))
179  {
180  error0 = DHCP_PROXY_ERROR_NO_SERVER;
181  next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
182  pkts_no_server++;
183  goto do_trace;
184  }
185 
186  server = &proxy->dhcp_servers[0];
187  vlib_buffer_advance (b0, -(sizeof (*ip0)));
188  ip0 = vlib_buffer_get_current (b0);
189 
190  /* disable UDP checksum */
191  u0->checksum = 0;
192  sum0 = ip0->checksum;
193  old0 = ip0->dst_address.as_u32;
194  new0 = server->dhcp_server.ip4.as_u32;
195  ip0->dst_address.as_u32 = server->dhcp_server.ip4.as_u32;
196  sum0 = ip_csum_update (sum0, old0, new0,
197  ip4_header_t /* structure */ ,
198  dst_address /* changed member */ );
199  ip0->checksum = ip_csum_fold (sum0);
200 
201  sum0 = ip0->checksum;
202  old0 = ip0->src_address.as_u32;
203  new0 = proxy->dhcp_src_address.ip4.as_u32;
204  ip0->src_address.as_u32 = new0;
205  sum0 = ip_csum_update (sum0, old0, new0,
206  ip4_header_t /* structure */ ,
207  src_address /* changed member */ );
208  ip0->checksum = ip_csum_fold (sum0);
209 
210  /* Send to DHCP server via the configured FIB */
211  vnet_buffer (b0)->sw_if_index[VLIB_TX] = server->server_fib_index;
212 
213  h0->gateway_ip_address.as_u32 = proxy->dhcp_src_address.ip4.as_u32;
214  pkts_to_server++;
215 
216  o = (dhcp_option_t *) h0->options;
217 
218  fib_index = im->fib_index_by_sw_if_index
219  [vnet_buffer (b0)->sw_if_index[VLIB_RX]];
220 
221  end = b0->data + b0->current_data + b0->current_length;
222  /* TLVs are not performance-friendly... */
223  while (o->option != 0xFF /* end of options */ && (u8 *) o < end)
224  {
226  {
227  if (DHCP_PACKET_DISCOVER == o->data[0])
228  {
229  is_discover = 1;
230  }
231  }
232  o = (dhcp_option_t *) (((uword) o) + (o->length + 2));
233  }
234 
235  fl =
238  // start write at (option*)o, some packets have padding
239  if (((u8 *) o - (u8 *) b0->data + VPP_DHCP_OPTION82_SIZE) >
240  fl->n_data_bytes)
241  {
242  next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
243  pkts_too_big++;
244  goto do_trace;
245  }
246 
247  if ((o->option == 0xFF) && ((u8 *) o <= end))
248  {
249  vnet_main_t *vnm = vnet_get_main ();
250  u16 old_l0, new_l0;
251  ip4_address_t _ia0, *ia0 = &_ia0;
252  dhcp_vss_t *vss;
253  vnet_sw_interface_t *swif;
254  sw_if_index = 0;
255  original_sw_if_index = 0;
256 
257  original_sw_if_index = sw_if_index =
258  vnet_buffer (b0)->sw_if_index[VLIB_RX];
259  swif = vnet_get_sw_interface (vnm, sw_if_index);
261  sw_if_index = swif->unnumbered_sw_if_index;
262 
263  /*
264  * Get the first ip4 address on the [client-side]
265  * RX interface, if not unnumbered. otherwise use
266  * the loopback interface's ip address.
267  */
268  ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
269 
270  if (ia0 == 0)
271  {
272  error0 = DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS;
273  next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
274  pkts_no_interface_address++;
275  goto do_trace;
276  }
277 
278  /* Add option 82 */
279  o->option = 82; /* option 82 */
280  o->length = 12; /* 12 octets to follow */
281  o->data[0] = 1; /* suboption 1, circuit ID (=FIB id) */
282  o->data[1] = 4; /* length of suboption */
283  u32 *o_ifid = (u32 *) & o->data[2];
284  *o_ifid = clib_host_to_net_u32 (original_sw_if_index);
285  o->data[6] = 5; /* suboption 5 (client RX intfc address) */
286  o->data[7] = 4; /* length 4 */
287  u32 *o_addr = (u32 *) & o->data[8];
288  *o_addr = ia0->as_u32;
289  o->data[12] = 0xFF;
290 
291  vss = dhcp_get_vss_info (dpm, fib_index, FIB_PROTOCOL_IP4);
292  if (vss)
293  {
294  u32 id_len; /* length of VPN ID */
295 
296  if (vss->vss_type == VSS_TYPE_VPN_ID)
297  {
298  id_len = sizeof (vss->vpn_id); /* vpn_id is 7 bytes */
299  memcpy (&o->data[15], vss->vpn_id, id_len);
300  }
301  else if (vss->vss_type == VSS_TYPE_ASCII)
302  {
303  id_len = vec_len (vss->vpn_ascii_id);
304  memcpy (&o->data[15], vss->vpn_ascii_id, id_len);
305  }
306  else /* must be VSS_TYPE_DEFAULT, no VPN ID */
307  id_len = 0;
308 
309  o->data[12] = 151; /* vss suboption */
310  o->data[13] = id_len + 1; /* length: vss_type + id_len */
311  o->data[14] = vss->vss_type; /* vss option type */
312  o->data[15 + id_len] = 152; /* vss control suboption */
313  o->data[16 + id_len] = 0; /* length */
314  o->data[17 + id_len] = 0xFF; /* "end-of-options" (0xFF) */
315  /* 5 bytes for suboption headers 151+len, 152+len and 0xFF */
316  o->length += id_len + 5;
317  }
318 
319  len = o->length + 3;
320  b0->current_length += len;
321  /* Fix IP header length and checksum */
322  old_l0 = ip0->length;
323  new_l0 = clib_net_to_host_u16 (old_l0);
324  new_l0 += len;
325  new_l0 = clib_host_to_net_u16 (new_l0);
326  ip0->length = new_l0;
327  sum0 = ip0->checksum;
328  sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
329  length /* changed member */ );
330  ip0->checksum = ip_csum_fold (sum0);
331 
332  /* Fix UDP length */
333  new_l0 = clib_net_to_host_u16 (u0->length);
334  new_l0 += len;
335  u0->length = clib_host_to_net_u16 (new_l0);
336  }
337  else
338  {
340  (vm, dhcp_proxy_to_server_node.index,
341  DHCP_PROXY_ERROR_OPTION_82_ERROR, 1);
342  }
343 
344  next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP;
345 
346  /*
347  * If we have multiple servers configured and this is the
348  * client's discover message, then send copies to each of
349  * those servers
350  */
351  if (is_discover && vec_len (proxy->dhcp_servers) > 1)
352  {
353  u32 ii;
354 
355  for (ii = 1; ii < vec_len (proxy->dhcp_servers); ii++)
356  {
357  vlib_buffer_t *c0;
358  u32 ci0;
359 
360  c0 = vlib_buffer_copy (vm, b0);
361  ci0 = vlib_get_buffer_index (vm, c0);
362  server = &proxy->dhcp_servers[ii];
363 
364  ip0 = vlib_buffer_get_current (c0);
365 
366  sum0 = ip0->checksum;
367  old0 = ip0->dst_address.as_u32;
368  new0 = server->dhcp_server.ip4.as_u32;
369  ip0->dst_address.as_u32 = server->dhcp_server.ip4.as_u32;
370  sum0 = ip_csum_update (sum0, old0, new0,
371  ip4_header_t /* structure */ ,
372  dst_address /* changed member */ );
373  ip0->checksum = ip_csum_fold (sum0);
374 
375  to_next[0] = ci0;
376  to_next += 1;
377  n_left_to_next -= 1;
378 
379  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
380  to_next, n_left_to_next,
381  ci0, next0);
382 
383  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
384  {
385  dhcp_proxy_trace_t *tr;
386 
387  tr = vlib_add_trace (vm, node, c0, sizeof (*tr));
388  tr->which = 0; /* to server */
389  tr->error = error0;
390  tr->original_sw_if_index = original_sw_if_index;
391  tr->sw_if_index = sw_if_index;
392  if (next0 == DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP)
394  server->dhcp_server.ip4.as_u32;
395  }
396 
397  if (PREDICT_FALSE (0 == n_left_to_next))
398  {
399  vlib_put_next_frame (vm, node, next_index,
400  n_left_to_next);
401  vlib_get_next_frame (vm, node, next_index,
402  to_next, n_left_to_next);
403  }
404  }
405  }
406  do_trace:
407  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
408  {
409  dhcp_proxy_trace_t *tr = vlib_add_trace (vm, node,
410  b0, sizeof (*tr));
411  tr->which = 0; /* to server */
412  tr->error = error0;
413  tr->original_sw_if_index = original_sw_if_index;
414  tr->sw_if_index = sw_if_index;
415  if (next0 == DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP)
417  proxy->dhcp_servers[0].dhcp_server.ip4.as_u32;
418  }
419 
420  do_enqueue:
421  to_next[0] = bi0;
422  to_next += 1;
423  n_left_to_next -= 1;
424 
425  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
426  to_next, n_left_to_next,
427  bi0, next0);
428  }
429 
430  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
431  }
432 
434  DHCP_PROXY_ERROR_RELAY_TO_CLIENT,
435  pkts_to_client);
437  DHCP_PROXY_ERROR_RELAY_TO_SERVER,
438  pkts_to_server);
440  DHCP_PROXY_ERROR_NO_SERVER, pkts_no_server);
442  DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS,
443  pkts_no_interface_address);
445  DHCP_PROXY_ERROR_PKT_TOO_BIG, pkts_too_big);
446  return from_frame->n_vectors;
447 }
448 
449 /* *INDENT-OFF* */
451  .function = dhcp_proxy_to_server_input,
452  .name = "dhcp-proxy-to-server",
453  /* Takes a vector of packets. */
454  .vector_size = sizeof (u32),
455 
456  .n_errors = DHCP_PROXY_N_ERROR,
457  .error_strings = dhcp_proxy_error_strings,
458 
459  .n_next_nodes = DHCP_PROXY_TO_SERVER_INPUT_N_NEXT,
460  .next_nodes = {
461 #define _(s,n) [DHCP_PROXY_TO_SERVER_INPUT_NEXT_##s] = n,
463 #undef _
464  },
465 
466  .format_buffer = format_dhcp_proxy_header_with_length,
467  .format_trace = format_dhcp_proxy_trace,
468 #if 0
469  .unformat_buffer = unformat_dhcp_proxy_header,
470 #endif
471 };
472 /* *INDENT-ON* */
473 
474 static uword
476  vlib_node_runtime_t * node,
477  vlib_frame_t * from_frame)
478 {
479  u32 n_left_from, *from;
482  vnet_main_t *vnm = vnet_get_main ();
483  ip4_main_t *im = &ip4_main;
484 
485  from = vlib_frame_vector_args (from_frame);
486  n_left_from = from_frame->n_vectors;
487 
488  while (n_left_from > 0)
489  {
490  u32 bi0;
491  vlib_buffer_t *b0;
492  udp_header_t *u0;
493  dhcp_header_t *h0;
494  ip4_header_t *ip0 = 0;
495  ip4_address_t *ia0 = 0;
496  u32 old0, new0;
497  ip_csum_t sum0;
499  ethernet_header_t *mac0;
500  vnet_hw_interface_t *hi0;
501  vlib_frame_t *f0;
502  u32 *to_next0;
503  u32 sw_if_index = ~0;
504  vnet_sw_interface_t *si0;
505  u32 error0 = (u32) ~ 0;
506  vnet_sw_interface_t *swif;
507  u32 fib_index;
508  dhcp_proxy_t *proxy;
509  dhcp_server_t *server;
510  u32 original_sw_if_index = (u32) ~ 0;
511  ip4_address_t relay_addr = {
512  .as_u32 = 0,
513  };
514 
515  bi0 = from[0];
516  from += 1;
517  n_left_from -= 1;
518 
519  b0 = vlib_get_buffer (vm, bi0);
520  h0 = vlib_buffer_get_current (b0);
521 
522  /*
523  * udp_local hands us the DHCP header, need udp hdr,
524  * ip hdr to relay to client
525  */
526  vlib_buffer_advance (b0, -(sizeof (*u0)));
527  u0 = vlib_buffer_get_current (b0);
528 
529  vlib_buffer_advance (b0, -(sizeof (*ip0)));
530  ip0 = vlib_buffer_get_current (b0);
531 
532  /* Consumed by dhcp client code? */
533  if (dhcp_client_for_us (bi0, b0, ip0, u0, h0))
534  continue;
535 
536  if (1 /* dpm->insert_option_82 */ )
537  {
538  dhcp_option_t *o = (dhcp_option_t *) h0->options;
539  dhcp_option_t *sub;
540 
541  /* Parse through TLVs looking for option 82.
542  The circuit-ID is the FIB number we need
543  to track down the client-facing interface */
544 
545  while (o->option != 0xFF /* end of options */ &&
546  (u8 *) o <
547  (b0->data + b0->current_data + b0->current_length))
548  {
549  if (o->option == 82)
550  {
551  u32 vss_exist = 0;
552  u32 vss_ctrl = 0;
553  sub = (dhcp_option_t *) & o->data[0];
554  while (sub->option != 0xFF /* end of options */ &&
555  (u8 *) sub < (u8 *) (o + o->length))
556  {
557  /* If this is one of ours, it will have
558  total length 12, circuit-id suboption type,
559  and the sw_if_index */
560  if (sub->option == 1 && sub->length == 4)
561  {
562  sw_if_index = ((sub->data[0] << 24) |
563  (sub->data[1] << 16) |
564  (sub->data[2] << 8) |
565  (sub->data[3]));
566  }
567  else if (sub->option == 5 && sub->length == 4)
568  {
569  relay_addr.as_u8[0] = sub->data[0];
570  relay_addr.as_u8[1] = sub->data[1];
571  relay_addr.as_u8[2] = sub->data[2];
572  relay_addr.as_u8[3] = sub->data[3];
573  }
574  else if (sub->option == 151 &&
575  sub->length == 7 && sub->data[0] == 1)
576  vss_exist = 1;
577  else if (sub->option == 152 && sub->length == 0)
578  vss_ctrl = 1;
579  sub = (dhcp_option_t *)
580  (((uword) sub) + (sub->length + 2));
581  }
582  if (vss_ctrl && vss_exist)
584  (vm, dhcp_proxy_to_client_node.index,
585  DHCP_PROXY_ERROR_OPTION_82_VSS_NOT_PROCESSED, 1);
586 
587  }
588  o = (dhcp_option_t *) (((uword) o) + (o->length + 2));
589  }
590  }
591 
592  if (sw_if_index == (u32) ~ 0)
593  {
594  error0 = DHCP_PROXY_ERROR_NO_OPTION_82;
595 
596  drop_packet:
598  error0, 1);
600  to_next0 = vlib_frame_vector_args (f0);
601  to_next0[0] = bi0;
602  f0->n_vectors = 1;
604  goto do_trace;
605  }
606 
607  if (relay_addr.as_u32 == 0)
608  {
609  error0 = DHCP_PROXY_ERROR_BAD_OPTION_82_ADDR;
610  goto drop_packet;
611  }
612 
613  if (sw_if_index >= vec_len (im->fib_index_by_sw_if_index))
614  {
615  error0 = DHCP_PROXY_ERROR_BAD_OPTION_82_ITF;
616  goto drop_packet;
617  }
618 
619  fib_index = im->fib_index_by_sw_if_index[sw_if_index];
620  proxy = dhcp_get_proxy (dpm, fib_index, FIB_PROTOCOL_IP4);
621 
622  if (PREDICT_FALSE (NULL == proxy))
623  {
624  error0 = DHCP_PROXY_ERROR_NO_SERVER;
625  goto drop_packet;
626  }
627 
628  vec_foreach (server, proxy->dhcp_servers)
629  {
630  if (ip0->src_address.as_u32 == server->dhcp_server.ip4.as_u32)
631  {
632  goto server_found;
633  }
634  }
635 
636  error0 = DHCP_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS;
637  goto drop_packet;
638 
639  server_found:
640  vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index;
641 
642  swif = vnet_get_sw_interface (vnm, sw_if_index);
643  original_sw_if_index = sw_if_index;
645  sw_if_index = swif->unnumbered_sw_if_index;
646 
647  ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
648  if (ia0 == 0)
649  {
650  error0 = DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS;
651  goto drop_packet;
652  }
653 
654  if (relay_addr.as_u32 != ia0->as_u32)
655  {
656  error0 = DHCP_PROXY_ERROR_BAD_YIADDR;
657  goto drop_packet;
658  }
659 
660  u0->checksum = 0;
661  u0->dst_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcp_to_client);
662  sum0 = ip0->checksum;
663  old0 = ip0->dst_address.as_u32;
664  new0 = 0xFFFFFFFF;
665  ip0->dst_address.as_u32 = new0;
666  sum0 = ip_csum_update (sum0, old0, new0, ip4_header_t /* structure */ ,
667  dst_address /* offset of changed member */ );
668  ip0->checksum = ip_csum_fold (sum0);
669 
670  sum0 = ip0->checksum;
671  old0 = ip0->src_address.as_u32;
672  new0 = ia0->as_u32;
673  ip0->src_address.as_u32 = new0;
674  sum0 = ip_csum_update (sum0, old0, new0, ip4_header_t /* structure */ ,
675  src_address /* offset of changed member */ );
676  ip0->checksum = ip_csum_fold (sum0);
677 
678  vlib_buffer_advance (b0, -(sizeof (ethernet_header_t)));
679  si0 = vnet_get_sw_interface (vnm, original_sw_if_index);
680  if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
681  vlib_buffer_advance (b0, -4 /* space for VLAN tag */ );
682 
683  mac0 = vlib_buffer_get_current (b0);
684 
685  hi0 = vnet_get_sup_hw_interface (vnm, original_sw_if_index);
686  ei0 = pool_elt_at_index (em->interfaces, hi0->hw_instance);
687  clib_memcpy (mac0->src_address, ei0->address, sizeof (ei0->address));
688  memset (mac0->dst_address, 0xff, sizeof (mac0->dst_address));
689  mac0->type = (si0->type == VNET_SW_INTERFACE_TYPE_SUB) ?
690  clib_net_to_host_u16 (0x8100) : clib_net_to_host_u16 (0x0800);
691 
692  if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
693  {
694  u32 *vlan_tag = (u32 *) (mac0 + 1);
695  u32 tmp;
696  tmp = (si0->sub.id << 16) | 0x0800;
697  *vlan_tag = clib_host_to_net_u32 (tmp);
698  }
699 
700  /* $$$ This needs to be rewritten, for sure */
702  to_next0 = vlib_frame_vector_args (f0);
703  to_next0[0] = bi0;
704  f0->n_vectors = 1;
706 
707  do_trace:
708  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
709  {
710  dhcp_proxy_trace_t *tr = vlib_add_trace (vm, node,
711  b0, sizeof (*tr));
712  tr->which = 1; /* to client */
713  tr->trace_ip4_address.as_u32 = ia0 ? ia0->as_u32 : 0;
714  tr->error = error0;
715  tr->original_sw_if_index = original_sw_if_index;
716  tr->sw_if_index = sw_if_index;
717  }
718  }
719  return from_frame->n_vectors;
720 }
721 
722 /* *INDENT-OFF* */
724  .function = dhcp_proxy_to_client_input,
725  .name = "dhcp-proxy-to-client",
726  /* Takes a vector of packets. */
727  .vector_size = sizeof (u32),
728 
729  .n_errors = DHCP_PROXY_N_ERROR,
730  .error_strings = dhcp_proxy_error_strings,
731  .format_buffer = format_dhcp_proxy_header_with_length,
732  .format_trace = format_dhcp_proxy_trace,
733 #if 0
734  .unformat_buffer = unformat_dhcp_proxy_header,
735 #endif
736 };
737 /* *INDENT-ON* */
738 
739 static clib_error_t *
741 {
743  vlib_node_t *error_drop_node;
744 
745  error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
746  dm->error_drop_node_index = error_drop_node->index;
747 
748  udp_register_dst_port (vm, UDP_DST_PORT_dhcp_to_client,
749  dhcp_proxy_to_client_node.index, 1 /* is_ip4 */ );
750 
751  udp_register_dst_port (vm, UDP_DST_PORT_dhcp_to_server,
752  dhcp_proxy_to_server_node.index, 1 /* is_ip4 */ );
753 
754  return 0;
755 }
756 
757 
759 
760 int
761 dhcp4_proxy_set_server (ip46_address_t * addr,
762  ip46_address_t * src_addr,
763  u32 rx_table_id, u32 server_table_id, int is_del)
764 {
765  u32 rx_fib_index = 0;
766  int rc = 0;
767 
768  const fib_prefix_t all_1s = {
769  .fp_len = 32,
770  .fp_addr.ip4.as_u32 = 0xffffffff,
771  .fp_proto = FIB_PROTOCOL_IP4,
772  };
773 
774  if (ip46_address_is_zero (addr))
775  return VNET_API_ERROR_INVALID_DST_ADDRESS;
776 
777  if (ip46_address_is_zero (src_addr))
778  return VNET_API_ERROR_INVALID_SRC_ADDRESS;
779 
781  rx_table_id,
783 
784  if (is_del)
785  {
786  if (dhcp_proxy_server_del (FIB_PROTOCOL_IP4, rx_fib_index,
787  addr, server_table_id))
788  {
789  fib_table_entry_special_remove (rx_fib_index,
790  &all_1s, FIB_SOURCE_DHCP);
792  }
793  }
794  else
795  {
797  addr, src_addr,
798  rx_fib_index, server_table_id))
799  {
800  fib_table_entry_special_add (rx_fib_index,
801  &all_1s,
804  }
805  }
807 
808  return (rc);
809 }
810 
811 static clib_error_t *
813  unformat_input_t * input,
814  vlib_cli_command_t * cmd)
815 {
816  ip46_address_t server_addr, src_addr;
817  u32 server_table_id = 0, rx_table_id = 0;
818  int is_del = 0;
819  int set_src = 0, set_server = 0;
820 
821  memset (&server_addr, 0, sizeof (server_addr));
822  memset (&src_addr, 0, sizeof (src_addr));
823 
825  {
826  if (unformat (input, "server %U",
827  unformat_ip4_address, &server_addr.ip4))
828  set_server = 1;
829  else if (unformat (input, "server-fib-id %d", &server_table_id))
830  ;
831  else if (unformat (input, "rx-fib-id %d", &rx_table_id))
832  ;
833  else if (unformat (input, "src-address %U",
834  unformat_ip4_address, &src_addr.ip4))
835  set_src = 1;
836  else if (unformat (input, "delete") || unformat (input, "del"))
837  is_del = 1;
838  else
839  break;
840  }
841 
842  if (is_del || (set_server && set_src))
843  {
844  int rv;
845 
846  rv = dhcp4_proxy_set_server (&server_addr, &src_addr, rx_table_id,
847  server_table_id, is_del);
848  switch (rv)
849  {
850  case 0:
851  return 0;
852 
853  case VNET_API_ERROR_INVALID_DST_ADDRESS:
854  return clib_error_return (0, "Invalid server address");
855 
856  case VNET_API_ERROR_INVALID_SRC_ADDRESS:
857  return clib_error_return (0, "Invalid src address");
858 
859  case VNET_API_ERROR_NO_SUCH_ENTRY:
860  return clib_error_return
861  (0, "Fib id %d: no per-fib DHCP server configured", rx_table_id);
862 
863  default:
864  return clib_error_return (0, "BUG: rv %d", rv);
865  }
866  }
867  else
868  return clib_error_return (0, "parse error`%U'",
869  format_unformat_error, input);
870 }
871 
872 /* *INDENT-OFF* */
873 VLIB_CLI_COMMAND (dhcp_proxy_set_command, static) = {
874  .path = "set dhcp proxy",
875  .short_help = "set dhcp proxy [del] server <ip-addr> src-address <ip-addr> [server-fib-id <n>] [rx-fib-id <n>]",
876  .function = dhcp4_proxy_set_command_fn,
877 };
878 /* *INDENT-ON* */
879 
880 static u8 *
881 format_dhcp4_proxy_server (u8 * s, va_list * args)
882 {
883  dhcp_proxy_t *proxy = va_arg (*args, dhcp_proxy_t *);
884  ip4_fib_t *rx_fib, *server_fib;
885  dhcp_server_t *server;
886 
887  if (proxy == 0)
888  {
889  s = format (s, "%=14s%=16s%s", "RX FIB", "Src Address",
890  "Servers FIB,Address");
891  return s;
892  }
893 
894  rx_fib = ip4_fib_get (proxy->rx_fib_index);
895 
896  s = format (s, "%=14u%=16U",
897  rx_fib->table_id,
899 
900  vec_foreach (server, proxy->dhcp_servers)
901  {
902  server_fib = ip4_fib_get (server->server_fib_index);
903  s = format (s, "%u,%U ",
904  server_fib->table_id,
906  }
907  return s;
908 }
909 
910 static int
912 {
913  vlib_main_t *vm = ctx;
914 
915  vlib_cli_output (vm, "%U", format_dhcp4_proxy_server, server);
916 
917  return (1);
918 }
919 
920 static clib_error_t *
922  unformat_input_t * input,
923  vlib_cli_command_t * cmd)
924 {
926  NULL /* header line */ );
927 
929 
930  return (NULL);
931 }
932 
933 /* *INDENT-OFF* */
934 VLIB_CLI_COMMAND (dhcp_proxy_show_command, static) = {
935  .path = "show dhcp proxy",
936  .short_help = "Display dhcp proxy server info",
937  .function = dhcp4_proxy_show_command_fn,
938 };
939 /* *INDENT-ON* */
940 
941 static clib_error_t *
943  unformat_input_t * input, vlib_cli_command_t * cmd)
944 {
945  u8 is_del = 0, vss_type = VSS_TYPE_DEFAULT;
946  u32 oui = 0, fib_id = 0, tbl_id = ~0;
947  u8 *vpn_ascii_id = 0;
948 
950  {
951  if (unformat (input, "table %d", &tbl_id))
952  ;
953  else if (unformat (input, "oui %d", &oui))
954  vss_type = VSS_TYPE_VPN_ID;
955  else if (unformat (input, "vpn-id %d", &fib_id))
956  vss_type = VSS_TYPE_VPN_ID;
957  else if (unformat (input, "vpn-ascii-id %s", &vpn_ascii_id))
958  vss_type = VSS_TYPE_ASCII;
959  else if (unformat (input, "delete") || unformat (input, "del"))
960  is_del = 1;
961  else
962  break;
963  }
964 
965  if (tbl_id == ~0)
966  return clib_error_return (0, "no table ID specified.");
967 
968  int rv = dhcp_proxy_set_vss (FIB_PROTOCOL_IP4, tbl_id, vss_type,
969  vpn_ascii_id, oui, fib_id, is_del);
970  switch (rv)
971  {
972  case 0:
973  return 0;
974  case VNET_API_ERROR_NO_SUCH_ENTRY:
975  return clib_error_return (0,
976  "option 82 vss for table %d not found in in pool.",
977  tbl_id);
978  default:
979  return clib_error_return (0, "BUG: rv %d", rv);
980 
981  }
982 }
983 
984 /* *INDENT-OFF* */
985 VLIB_CLI_COMMAND (dhcp_proxy_vss_command,static) = {
986  .path = "set dhcp option-82 vss",
987  .short_help = "set dhcp option-82 vss [del] table <table id> [oui <n> vpn-id <n> | vpn-ascii-id <text>]",
988  .function = dhcp_option_82_vss_fn,
989 };
990 /* *INDENT-ON* */
991 
992 static clib_error_t *
994  unformat_input_t * input, vlib_cli_command_t * cmd)
995 {
997 
998  return (NULL);
999 }
1000 
1001 /* *INDENT-OFF* */
1002 VLIB_CLI_COMMAND (dhcp_proxy_vss_show_command, static) = {
1003  .path = "show dhcp vss",
1004  .short_help = "show dhcp VSS",
1005  .function = dhcp_vss_show_command_fn,
1006 };
1007 /* *INDENT-ON* */
1008 
1009 static clib_error_t *
1011  unformat_input_t * input,
1012  vlib_cli_command_t * cmd)
1013 {
1014  vnet_main_t *vnm = vnet_get_main ();
1015  u32 sw_if_index0 = 0, sw_if_index;
1016  vnet_sw_interface_t *swif;
1017  ip4_address_t *ia0;
1018 
1019  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1020  {
1021 
1022  if (unformat (input, "%U",
1023  unformat_vnet_sw_interface, vnm, &sw_if_index0))
1024  {
1025  swif = vnet_get_sw_interface (vnm, sw_if_index0);
1026  sw_if_index = (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) ?
1027  swif->unnumbered_sw_if_index : sw_if_index0;
1028  ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
1029  if (ia0)
1030  {
1031  vlib_cli_output (vm, "%=20s%=20s", "interface",
1032  "source IP address");
1033 
1034  vlib_cli_output (vm, "%=20U%=20U",
1036  vnm, sw_if_index0, format_ip4_address, ia0);
1037  }
1038  else
1039  vlib_cli_output (vm, "%=34s %=20U",
1040  "No IPv4 address configured on",
1041  format_vnet_sw_if_index_name, vnm, sw_if_index);
1042  }
1043  else
1044  break;
1045  }
1046 
1047  return 0;
1048 }
1049 
1050 /* *INDENT-OFF* */
1051 VLIB_CLI_COMMAND (dhcp_proxy_address_show_command,static) = {
1052  .path = "show dhcp option-82-address interface",
1053  .short_help = "show dhcp option-82-address interface <interface>",
1055 };
1056 /* *INDENT-ON* */
1057 
1058 /*
1059  * fd.io coding-style-patch-verification: ON
1060  *
1061  * Local Variables:
1062  * eval: (c-set-style "gnu")
1063  * End:
1064  */
static vlib_node_registration_t dhcp_proxy_to_client_node
(constructor) VLIB_REGISTER_NODE (dhcp_proxy_to_client_node)
#define VNET_SW_INTERFACE_FLAG_UNNUMBERED
Definition: interface.h:668
static dhcp_vss_t * dhcp_get_vss_info(dhcp_proxy_main_t *dm, u32 rx_fib_index, fib_protocol_t proto)
Get the VSS data for the FIB index.
Definition: dhcp_proxy.h:237
#define CLIB_UNUSED(x)
Definition: clib.h:79
ip4_address_t src_address
Definition: ip4_packet.h:169
vnet_main_t * vnet_get_main(void)
Definition: misc.c:47
static vnet_hw_interface_t * vnet_get_sup_hw_interface(vnet_main_t *vnm, u32 sw_if_index)
void dhcp_vss_walk(fib_protocol_t proto, dhcp_vss_walk_fn_t fn, void *ctx)
Walk/Visit each DHCP proxy VSS.
Definition: dhcp_proxy.c:87
dhcp_server_t * dhcp_servers
The set of DHCP servers to which messages are relayed.
Definition: dhcp_proxy.h:105
static uword dhcp_proxy_to_client_input(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
void dhcp_proxy_walk(fib_protocol_t proto, dhcp_proxy_walk_fn_t fn, void *ctx)
Walk/Visit each DHCP proxy server.
Definition: dhcp_proxy.c:67
static clib_error_t * dhcp4_proxy_show_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
#define VPP_DHCP_OPTION82_SIZE
#define NULL
Definition: clib.h:55
u32 index
Definition: node.h:273
ip4_address_t * ip4_interface_first_address(ip4_main_t *im, u32 sw_if_index, ip_interface_address_t **result_ia)
Definition: ip4_forward.c:320
dhcp_proxy_main_t dhcp_proxy_main
Shard 4/6 instance of DHCP main.
Definition: dhcp_proxy.c:25
u8 src_address[6]
Definition: packet.h:56
int dhcp_vss_show_walk(dhcp_vss_t *vss, u32 rx_table_id, void *ctx)
Show (on CLI) a VSS config during a show walk.
Definition: dhcp_proxy.c:259
static uword dhcp_proxy_to_server_input(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
ip46_address_t dhcp_src_address
The source address to use in relayed messaes.
Definition: dhcp_proxy.h:120
The Virtual Sub-net Selection information for a given RX FIB.
Definition: dhcp_proxy.h:51
int dhcp_client_for_us(u32 bi, vlib_buffer_t *b, ip4_header_t *ip, udp_header_t *udp, dhcp_header_t *dhcp)
Definition: client.c:161
u32 rx_fib_index
The FIB index (not the external Table-ID) in which the client is resides.
Definition: dhcp_proxy.h:126
format_function_t format_ip46_address
Definition: format.h:61
uword ip_csum_t
Definition: ip_packet.h:181
static vnet_sw_interface_t * vnet_get_sw_interface(vnet_main_t *vnm, u32 sw_if_index)
u32 * fib_index_by_sw_if_index
Table index indexed by software interface.
Definition: ip4.h:111
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
unformat_function_t unformat_vnet_sw_interface
u8 vss_type
VSS type as defined in RFC 6607: 0 for NVT ASCII VPN Identifier 1 for RFC 2685 VPN-ID of 7 octects - ...
Definition: dhcp_proxy.h:59
vhost_vring_addr_t addr
Definition: vhost_user.h:116
format_function_t format_vnet_sw_if_index_name
unsigned char u8
Definition: types.h:56
static vlib_buffer_t * vlib_buffer_copy(vlib_main_t *vm, vlib_buffer_t *b)
Definition: buffer_funcs.h:715
format_function_t format_ip4_address
Definition: format.h:81
i16 current_data
signed offset in data[], pre_data[] that we are currently processing.
Definition: buffer.h:104
unformat_function_t unformat_ip4_address
Definition: format.h:76
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:156
u32 table_id
Definition: ip4_fib.h:54
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
ip4_address_t dst_address
Definition: ip4_packet.h:169
u8 dst_address[6]
Definition: packet.h:55
static vlib_node_registration_t dhcp_proxy_to_server_node
(constructor) VLIB_REGISTER_NODE (dhcp_proxy_to_server_node)
Aggregrate type for a prefix.
Definition: fib_types.h:193
vlib_frame_t * vlib_get_frame_to_node(vlib_main_t *vm, u32 to_node_index)
Definition: main.c:182
static clib_error_t * dhcp4_proxy_set_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
static dhcp_proxy_t * dhcp_get_proxy(dhcp_proxy_main_t *dm, u32 rx_fib_index, fib_protocol_t proto)
Get the DHCP proxy server data for the FIB index.
Definition: dhcp_proxy.h:257
#define clib_error_return(e, args...)
Definition: error.h:99
#define VSS_TYPE_ASCII
Definition: dhcp_proxy.h:60
int dhcp_proxy_server_add(fib_protocol_t proto, ip46_address_t *addr, ip46_address_t *src_address, u32 rx_fib_index, u32 server_table_id)
Add a new DHCP proxy server configuration.
Definition: dhcp_proxy.c:184
unsigned int u32
Definition: types.h:88
u16 fp_len
The mask length.
Definition: fib_types.h:197
#define VSS_TYPE_DEFAULT
Definition: dhcp_proxy.h:63
static u32 vlib_get_buffer_index(vlib_main_t *vm, void *p)
Translate buffer pointer into buffer index.
Definition: buffer_funcs.h:141
#define fl(x, y)
u32 server_fib_index
The FIB index (not the external Table-ID) in which the server is reachable.
Definition: dhcp_proxy.h:89
static u8 * format_dhcp4_proxy_server(u8 *s, va_list *args)
Definition: fib_entry.h:280
Collection of global DHCP proxy data.
Definition: dhcp_proxy.h:134
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:464
vnet_sub_interface_t sub
Definition: interface.h:698
u16 current_length
Nbytes between current data and the end of this buffer.
Definition: buffer.h:108
struct _unformat_input_t unformat_input_t
unsigned short u16
Definition: types.h:57
dhcp_proxy_to_server_input_next_t
void vlib_put_frame_to_node(vlib_main_t *vm, u32 to_node_index, vlib_frame_t *f)
Definition: main.c:191
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:202
#define PREDICT_FALSE(x)
Definition: clib.h:105
static char * dhcp_proxy_error_strings[]
int dhcp_proxy_set_vss(fib_protocol_t proto, u32 tbl_id, u8 vss_type, u8 *vpn_ascii_id, u32 oui, u32 vpn_index, u8 is_del)
Configure/set a new VSS info.
Definition: dhcp_proxy.c:309
#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:364
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:1228
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1168
static clib_error_t * dhcp4_proxy_init(vlib_main_t *vm)
fib_node_index_t fib_table_entry_special_add(u32 fib_index, const fib_prefix_t *prefix, fib_source_t source, fib_entry_flag_t flags)
Add a &#39;special&#39; entry to the FIB.
Definition: fib_table.c:388
The IPv4 FIB.
Definition: ip4_fib.h:39
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:153
#define UNFORMAT_END_OF_INPUT
Definition: format.h:144
u8 * vpn_ascii_id
Type 0 ASCII VPN Identifier.
Definition: dhcp_proxy.h:71
u16 n_vectors
Definition: node.h:380
vlib_main_t * vm
Definition: buffer.c:294
static clib_error_t * dhcp_option_82_address_show_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
static ip4_fib_t * ip4_fib_get(u32 index)
Get the FIB at the given index.
Definition: ip4_fib.h:113
#define clib_memcpy(a, b, c)
Definition: string.h:75
A representation of a single DHCP Server within a given VRF config.
Definition: dhcp_proxy.h:77
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:454
vlib_node_t * vlib_get_node_by_name(vlib_main_t *vm, u8 *name)
Definition: node.c:45
void fib_table_lock(u32 fib_index, fib_protocol_t proto, fib_source_t source)
Release a reference counting lock on the table.
Definition: fib_table.c:1257
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:154
int dhcp4_proxy_set_server(ip46_address_t *addr, ip46_address_t *src_addr, u32 rx_table_id, u32 server_table_id, int is_del)
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:492
ip46_address_t dhcp_server
The address of the DHCP server to which to relay the client&#39;s messages.
Definition: dhcp_proxy.h:83
static u8 * format_dhcp_proxy_trace(u8 *s, va_list *args)
long ctx[MAX_CONNS]
Definition: main.c:126
static vlib_buffer_free_list_index_t vlib_buffer_get_free_list_index(vlib_buffer_t *b)
Definition: buffer_funcs.h:401
#define foreach_dhcp_proxy_to_server_input_next
ip4_address_t gateway_ip_address
Definition: dhcp4_packet.h:35
static clib_error_t * dhcp_option_82_vss_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
IPv4 main type.
Definition: ip4.h:95
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:1115
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:215
static clib_error_t * dhcp_vss_show_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
ip4_address_t trace_ip4_address
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
struct _vlib_node_registration vlib_node_registration_t
A DHCP proxy represenation fpr per-client VRF config.
Definition: dhcp_proxy.h:95
Definition: defs.h:47
int dhcp_proxy_server_del(fib_protocol_t proto, u32 rx_fib_index, ip46_address_t *addr, u32 server_table_id)
Delete a DHCP proxy config.
Definition: dhcp_proxy.c:144
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
u8 vpn_id[7]
Type 1 VPN-ID.
Definition: dhcp_proxy.h:67
DHCP.
Definition: fib_entry.h:94
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:267
#define ip_csum_update(sum, old, new, type, field)
Definition: ip_packet.h:231
#define VSS_TYPE_VPN_ID
Definition: dhcp_proxy.h:61
static u8 * format_dhcp_proxy_header_with_length(u8 *s, va_list *args)
static ethernet_main_t * vnet_get_ethernet_main(void)
Definition: ethernet.h:550
#define vnet_buffer(b)
Definition: buffer.h:360
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
vnet_sw_interface_type_t type
Definition: interface.h:656
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:832
u8 data[0]
Packet data.
Definition: buffer.h:172
#define vec_foreach(var, vec)
Vector iterator.
void udp_register_dst_port(vlib_main_t *vm, udp_dst_port_t dst_port, u32 node_index, u8 is_ip4)
Definition: udp_local.c:492
static vlib_buffer_free_list_t * vlib_buffer_get_free_list(vlib_main_t *vm, vlib_buffer_free_list_index_t free_list_index)
Definition: buffer_funcs.h:662
ethernet_interface_t * interfaces
Definition: ethernet.h:278
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:111
#define ip46_address_is_zero(ip46)
Definition: ip6_packet.h:86
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:681
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
static int dhcp4_proxy_show_walk(dhcp_proxy_t *server, void *ctx)
static u16 ip_csum_fold(ip_csum_t c)
Definition: ip_packet.h:237
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:972
Definition: defs.h:46
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:170