FD.io VPP  v19.08.3-2-gbabecb413
Vector Packet Processing
dhcp6_proxy_node.c
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1 /*
2  * dhcp6_proxy_node.c: dhcpv6 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/dhcp6_packet.h>
22 #include <vnet/mfib/mfib_table.h>
23 #include <vnet/mfib/ip6_mfib.h>
24 #include <vnet/fib/fib.h>
25 
26 static char *dhcpv6_proxy_error_strings[] = {
27 #define dhcpv6_proxy_error(n,s) s,
29 #undef dhcpv6_proxy_error
30 };
31 
32 #define foreach_dhcpv6_proxy_to_server_input_next \
33  _ (DROP, "error-drop") \
34  _ (LOOKUP, "ip6-lookup") \
35  _ (SEND_TO_CLIENT, "dhcpv6-proxy-to-client")
36 
37 
38 typedef enum
39 {
40 #define _(s,n) DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s,
42 #undef _
45 
46 typedef struct
47 {
48  /* 0 => to server, 1 => to client */
49  int which;
50  u8 packet_data[64];
55 
58 
59 /* all DHCP servers address */
62 
63 static u8 *
64 format_dhcpv6_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  dhcpv6_proxy_trace_t *t = va_arg (*args, dhcpv6_proxy_trace_t *);
69 
70  if (t->which == 0)
71  s = format (s, "DHCPV6 proxy: sent to server %U",
73  else
74  s = format (s, "DHCPV6 proxy: sent to client from %U",
76  if (t->error != (u32) ~ 0)
77  s = format (s, " error: %s\n", dhcpv6_proxy_error_strings[t->error]);
78 
79  s = format (s, " original_sw_if_index: %d, sw_if_index: %d\n",
81 
82  return s;
83 }
84 
85 static u8 *
87 {
88  dhcpv6_header_t *h = va_arg (*args, dhcpv6_header_t *);
89  u32 max_header_bytes = va_arg (*args, u32);
90  u32 header_bytes;
91 
92  header_bytes = sizeof (h[0]);
93  if (max_header_bytes != 0 && header_bytes > max_header_bytes)
94  return format (s, "dhcpv6 header truncated");
95 
96  s = format (s, "DHCPV6 Proxy");
97 
98  return s;
99 }
100 
101 /* get first interface address */
102 static ip6_address_t *
104 {
105  ip_lookup_main_t *lm = &im->lookup_main;
106  ip_interface_address_t *ia = 0;
107  ip6_address_t *result = 0;
108 
109  /* *INDENT-OFF* */
110  foreach_ip_interface_address (lm, ia, sw_if_index,
111  1 /* honor unnumbered */,
112  ({
114  if ((a->as_u8[0] & 0xe0) == 0x20 ||
115  (a->as_u8[0] & 0xfe) == 0xfc) {
116  result = a;
117  break;
118  }
119  }));
120  /* *INDENT-ON* */
121  return result;
122 }
123 
124 static inline void
126 {
127  dst->as_u64[0] = src->as_u64[0];
128  dst->as_u64[1] = src->as_u64[1];
129 }
130 
131 static uword
133  vlib_node_runtime_t * node,
134  vlib_frame_t * from_frame)
135 {
136  u32 n_left_from, next_index, *from, *to_next;
138  from = vlib_frame_vector_args (from_frame);
139  n_left_from = from_frame->n_vectors;
140  u32 pkts_to_server = 0, pkts_to_client = 0, pkts_no_server = 0;
141  u32 pkts_no_interface_address = 0, pkts_no_exceeding_max_hop = 0;
142  u32 pkts_no_src_address = 0;
143  u32 pkts_wrong_msg_type = 0;
144  u32 pkts_too_big = 0;
145  ip6_main_t *im = &ip6_main;
147  int bogus_length;
148  dhcp_proxy_t *proxy;
149  dhcp_server_t *server;
150  u32 rx_fib_idx = 0, server_fib_idx = 0;
151 
152  next_index = node->cached_next_index;
153 
154  while (n_left_from > 0)
155  {
156  u32 n_left_to_next;
157 
158  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
159 
160  while (n_left_from > 0 && n_left_to_next > 0)
161  {
162  vnet_main_t *vnm = vnet_get_main ();
163  u32 sw_if_index = 0;
164  u32 rx_sw_if_index = 0;
165  vnet_sw_interface_t *swif;
166  u32 bi0;
167  vlib_buffer_t *b0;
168  udp_header_t *u0, *u1;
169  dhcpv6_header_t *h0; // client msg hdr
170  ip6_header_t *ip0, *ip1;
171  ip6_address_t _ia0, *ia0 = &_ia0;
172  u32 next0;
173  u32 error0 = (u32) ~ 0;
174  dhcpv6_option_t *fwd_opt;
175  dhcpv6_relay_hdr_t *r1;
176  u16 len;
177  dhcpv6_int_id_t *id1;
178  dhcpv6_vss_t *vss1;
179  dhcpv6_client_mac_t *cmac; // client mac
180  ethernet_header_t *e_h0;
181  u8 client_src_mac[6];
182  dhcp_vss_t *vss;
183  u8 is_solicit = 0;
184 
185  bi0 = from[0];
186  from += 1;
187  n_left_from -= 1;
188 
189  b0 = vlib_get_buffer (vm, bi0);
190 
191  h0 = vlib_buffer_get_current (b0);
192 
193  /*
194  * udp_local hands us the DHCPV6 header.
195  */
196  u0 = (void *) h0 - (sizeof (*u0));
197  ip0 = (void *) u0 - (sizeof (*ip0));
198  e_h0 = (void *) ip0 - ethernet_buffer_header_size (b0);
199 
200  clib_memcpy (client_src_mac, e_h0->src_address, 6);
201 
202  switch (h0->msg_type)
203  {
204  case DHCPV6_MSG_SOLICIT:
205  case DHCPV6_MSG_REQUEST:
206  case DHCPV6_MSG_CONFIRM:
207  case DHCPV6_MSG_RENEW:
208  case DHCPV6_MSG_REBIND:
209  case DHCPV6_MSG_RELEASE:
210  case DHCPV6_MSG_DECLINE:
213  /* send to server */
214  break;
216  /* send to client */
217  next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_SEND_TO_CLIENT;
218  error0 = 0;
219  pkts_to_client++;
220  goto do_enqueue;
221  default:
222  /* drop the packet */
223  pkts_wrong_msg_type++;
224  error0 = DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
225  next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
226  goto do_trace;
227 
228  }
229 
230  /* Send to DHCPV6 server via the configured FIB */
231  rx_sw_if_index = sw_if_index =
232  vnet_buffer (b0)->sw_if_index[VLIB_RX];
233  rx_fib_idx = im->mfib_index_by_sw_if_index[rx_sw_if_index];
234  proxy = dhcp_get_proxy (dpm, rx_fib_idx, FIB_PROTOCOL_IP6);
235 
236  if (PREDICT_FALSE (NULL == proxy))
237  {
238  error0 = DHCPV6_PROXY_ERROR_NO_SERVER;
239  next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
240  pkts_no_server++;
241  goto do_trace;
242  }
243 
244  server = &proxy->dhcp_servers[0];
245  server_fib_idx = server->server_fib_index;
246  vnet_buffer (b0)->sw_if_index[VLIB_TX] = server_fib_idx;
247 
248 
249  /* relay-option header pointer */
250  vlib_buffer_advance (b0, -(sizeof (*fwd_opt)));
251  fwd_opt = vlib_buffer_get_current (b0);
252  /* relay message header pointer */
253  vlib_buffer_advance (b0, -(sizeof (*r1)));
254  r1 = vlib_buffer_get_current (b0);
255 
256  vlib_buffer_advance (b0, -(sizeof (*u1)));
257  u1 = vlib_buffer_get_current (b0);
258 
259  vlib_buffer_advance (b0, -(sizeof (*ip1)));
260  ip1 = vlib_buffer_get_current (b0);
261 
262  /* fill in all that rubbish... */
263  len = clib_net_to_host_u16 (u0->length) - sizeof (udp_header_t);
264  copy_ip6_address (&r1->peer_addr, &ip0->src_address);
265 
266  r1->msg_type = DHCPV6_MSG_RELAY_FORW;
267  fwd_opt->length = clib_host_to_net_u16 (len);
268  fwd_opt->option = clib_host_to_net_u16 (DHCPV6_OPTION_RELAY_MSG);
269 
270  r1->hop_count++;
271  r1->hop_count =
272  (h0->msg_type != DHCPV6_MSG_RELAY_FORW) ? 0 : r1->hop_count;
273 
274  if (PREDICT_FALSE (r1->hop_count >= HOP_COUNT_LIMIT))
275  {
277  next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
278  pkts_no_exceeding_max_hop++;
279  goto do_trace;
280  }
281 
282 
283  /* If relay-fwd and src address is site or global unicast address */
284  if (h0->msg_type == DHCPV6_MSG_RELAY_FORW &&
285  ((ip0->src_address.as_u8[0] & 0xe0) == 0x20 ||
286  (ip0->src_address.as_u8[0] & 0xfe) == 0xfc))
287  {
288  /* Set link address to zero */
289  r1->link_addr.as_u64[0] = 0;
290  r1->link_addr.as_u64[1] = 0;
291  goto link_address_set;
292  }
293 
294  /* if receiving interface is unnumbered, use receiving interface
295  * IP address as link address, otherwise use the loopback interface
296  * IP address as link address.
297  */
298 
299  swif = vnet_get_sw_interface (vnm, rx_sw_if_index);
301  sw_if_index = swif->unnumbered_sw_if_index;
302 
303  ia0 =
305  sw_if_index);
306  if (ia0 == 0)
307  {
308  error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
309  next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
310  pkts_no_interface_address++;
311  goto do_trace;
312  }
313 
314  copy_ip6_address (&r1->link_addr, ia0);
315 
316  link_address_set:
317 
318  if ((b0->current_data + b0->current_length + sizeof (*id1) +
319  sizeof (*vss1) + sizeof (*cmac)) >
321  {
322  error0 = DHCPV6_PROXY_ERROR_PKT_TOO_BIG;
323  next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
324  pkts_too_big++;
325  goto do_trace;
326  }
327 
328  id1 = (dhcpv6_int_id_t *) (((uword) ip1) + b0->current_length);
329  b0->current_length += (sizeof (*id1));
330 
331  id1->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_INTERFACE_ID);
332  id1->opt.length = clib_host_to_net_u16 (sizeof (rx_sw_if_index));
333  id1->int_idx = clib_host_to_net_u32 (rx_sw_if_index);
334 
335  u1->length = 0;
336  if (h0->msg_type != DHCPV6_MSG_RELAY_FORW)
337  {
338  cmac =
339  (dhcpv6_client_mac_t *) (((uword) ip1) + b0->current_length);
340  b0->current_length += (sizeof (*cmac));
341  cmac->opt.length = clib_host_to_net_u16 (sizeof (*cmac) -
342  sizeof (cmac->opt));
343  cmac->opt.option =
344  clib_host_to_net_u16
345  (DHCPV6_OPTION_CLIENT_LINK_LAYER_ADDRESS);
346  cmac->link_type = clib_host_to_net_u16 (1); /* ethernet */
347  clib_memcpy (cmac->data, client_src_mac, 6);
348  u1->length += sizeof (*cmac);
349  }
350 
351  vss = dhcp_get_vss_info (dpm, rx_fib_idx, FIB_PROTOCOL_IP6);
352 
353  if (vss)
354  {
355  u16 id_len; /* length of VPN ID */
356  u16 type_len = sizeof (vss1->vss_type);
357 
358  vss1 = (dhcpv6_vss_t *) (((uword) ip1) + b0->current_length);
359  vss1->vss_type = vss->vss_type;
360  if (vss->vss_type == VSS_TYPE_VPN_ID)
361  {
362  id_len = sizeof (vss->vpn_id); /* vpn_id is 7 bytes */
363  memcpy (vss1->data, vss->vpn_id, id_len);
364  }
365  else if (vss->vss_type == VSS_TYPE_ASCII)
366  {
367  id_len = vec_len (vss->vpn_ascii_id);
368  memcpy (vss1->data, vss->vpn_ascii_id, id_len);
369  }
370  else /* must be VSS_TYPE_DEFAULT, no VPN ID */
371  id_len = 0;
372 
373  vss1->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_VSS);
374  vss1->opt.length = clib_host_to_net_u16 (type_len + id_len);
375  u1->length += type_len + id_len + sizeof (vss1->opt);
376  b0->current_length += type_len + id_len + sizeof (vss1->opt);
377  }
378 
379  pkts_to_server++;
380  u1->checksum = 0;
381  u1->src_port = clib_host_to_net_u16 (UDP_DST_PORT_dhcpv6_to_client);
382  u1->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_dhcpv6_to_server);
383 
384  u1->length =
385  clib_host_to_net_u16 (clib_net_to_host_u16 (fwd_opt->length) +
386  sizeof (*r1) + sizeof (*fwd_opt) +
387  sizeof (*u1) + sizeof (*id1) + u1->length);
388 
389  clib_memset (ip1, 0, sizeof (*ip1));
390  ip1->ip_version_traffic_class_and_flow_label = 0x60;
391  ip1->payload_length = u1->length;
392  ip1->protocol = PROTO_UDP;
393  ip1->hop_limit = HOP_COUNT_LIMIT;
394  src = ((server->dhcp_server.ip6.as_u64[0] ||
395  server->dhcp_server.ip6.as_u64[1]) ?
396  &server->dhcp_server.ip6 : &all_dhcpv6_server_address);
397  copy_ip6_address (&ip1->dst_address, src);
398 
399 
401  (&ip6_main, vnet_buffer (b0)->sw_if_index[VLIB_RX]);
402 
403  src = (proxy->dhcp_src_address.ip6.as_u64[0] ||
404  proxy->dhcp_src_address.ip6.as_u64[1]) ?
405  &proxy->dhcp_src_address.ip6 : ia0;
406  if (ia0 == 0)
407  {
408  error0 = DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS;
409  next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
410  pkts_no_src_address++;
411  goto do_trace;
412  }
413 
414  copy_ip6_address (&ip1->src_address, src);
415 
416 
417  u1->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip1,
418  &bogus_length);
419  ASSERT (bogus_length == 0);
420 
421  next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP;
422 
423  is_solicit = (DHCPV6_MSG_SOLICIT == h0->msg_type);
424 
425  /*
426  * If we have multiple servers configured and this is the
427  * client's discover message, then send copies to each of
428  * those servers
429  */
430  if (is_solicit && vec_len (proxy->dhcp_servers) > 1)
431  {
432  u32 ii;
433 
434  for (ii = 1; ii < vec_len (proxy->dhcp_servers); ii++)
435  {
436  vlib_buffer_t *c0;
437  u32 ci0;
438 
439  c0 = vlib_buffer_copy (vm, b0);
440  if (c0 == NULL)
441  {
443  (vm, dhcpv6_proxy_to_server_node.index,
444  DHCPV6_PROXY_ERROR_ALLOC_FAIL, 1);
445  continue;
446  }
448  ci0 = vlib_get_buffer_index (vm, c0);
449  server = &proxy->dhcp_servers[ii];
450 
451  ip0 = vlib_buffer_get_current (c0);
452 
453  src = ((server->dhcp_server.ip6.as_u64[0] ||
454  server->dhcp_server.ip6.as_u64[1]) ?
455  &server->dhcp_server.ip6 :
456  &all_dhcpv6_server_address);
457  copy_ip6_address (&ip1->dst_address, src);
458 
459  to_next[0] = ci0;
460  to_next += 1;
461  n_left_to_next -= 1;
462 
463  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
464  to_next, n_left_to_next,
465  ci0, next0);
466 
467  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
468  {
470 
471  tr = vlib_add_trace (vm, node, c0, sizeof (*tr));
472  tr->which = 0; /* to server */
473  tr->error = error0;
474  tr->original_sw_if_index = rx_sw_if_index;
475  tr->sw_if_index = sw_if_index;
476  if (next0 == DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP)
478  tr->packet_data[0],
479  &server->dhcp_server.ip6);
480  }
481 
482  if (PREDICT_FALSE (0 == n_left_to_next))
483  {
484  vlib_put_next_frame (vm, node, next_index,
485  n_left_to_next);
486  vlib_get_next_frame (vm, node, next_index,
487  to_next, n_left_to_next);
488  }
489  }
490  }
491 
492  do_trace:
493  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
494  {
495  dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
496  b0, sizeof (*tr));
497  tr->which = 0; /* to server */
498  tr->error = error0;
499  tr->original_sw_if_index = rx_sw_if_index;
500  tr->sw_if_index = sw_if_index;
501  if (DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP == next0)
503  &server->dhcp_server.ip6);
504  }
505 
506  do_enqueue:
507  to_next[0] = bi0;
508  to_next += 1;
509  n_left_to_next -= 1;
510 
511  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
512  to_next, n_left_to_next,
513  bi0, next0);
514  }
515 
516  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
517  }
518 
520  DHCPV6_PROXY_ERROR_RELAY_TO_CLIENT,
521  pkts_to_client);
523  DHCPV6_PROXY_ERROR_RELAY_TO_SERVER,
524  pkts_to_server);
526  DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS,
527  pkts_no_interface_address);
529  DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE,
530  pkts_wrong_msg_type);
532  DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS,
533  pkts_no_src_address);
535  DHCPV6_PROXY_ERROR_PKT_TOO_BIG, pkts_too_big);
536  return from_frame->n_vectors;
537 }
538 
539 /* *INDENT-OFF* */
541  .function = dhcpv6_proxy_to_server_input,
542  .name = "dhcpv6-proxy-to-server",
543  /* Takes a vector of packets. */
544  .vector_size = sizeof (u32),
545 
546  .n_errors = DHCPV6_PROXY_N_ERROR,
547  .error_strings = dhcpv6_proxy_error_strings,
548 
549  .n_next_nodes = DHCPV6_PROXY_TO_SERVER_INPUT_N_NEXT,
550  .next_nodes = {
551 #define _(s,n) [DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s] = n,
553 #undef _
554  },
555 
557  .format_trace = format_dhcpv6_proxy_trace,
558 #if 0
559  .unformat_buffer = unformat_dhcpv6_proxy_header,
560 #endif
561 };
562 /* *INDENT-ON* */
563 
564 static uword
566  vlib_node_runtime_t * node,
567  vlib_frame_t * from_frame)
568 {
569 
570  u32 n_left_from, *from;
573  dhcp_proxy_t *proxy;
574  dhcp_server_t *server;
575  vnet_main_t *vnm = vnet_get_main ();
576  int bogus_length;
577 
578  from = vlib_frame_vector_args (from_frame);
579  n_left_from = from_frame->n_vectors;
580 
581  while (n_left_from > 0)
582  {
583  u32 bi0;
584  vlib_buffer_t *b0;
585  udp_header_t *u0, *u1 = 0;
586  dhcpv6_relay_hdr_t *h0;
587  ip6_header_t *ip1 = 0, *ip0;
588  ip6_address_t _ia0, *ia0 = &_ia0;
589  ip6_address_t client_address;
591  ethernet_header_t *mac0;
592  vnet_hw_interface_t *hi0;
593  vlib_frame_t *f0;
594  u32 *to_next0;
595  u32 sw_if_index = ~0;
596  u32 original_sw_if_index = ~0;
597  vnet_sw_interface_t *si0;
598  u32 error0 = (u32) ~ 0;
599  vnet_sw_interface_t *swif;
600  dhcpv6_option_t *r0 = 0, *o;
601  u16 len = 0;
602  u8 interface_opt_flag = 0;
603  u8 relay_msg_opt_flag = 0;
604  ip6_main_t *im = &ip6_main;
605  u32 server_fib_idx, client_fib_idx;
606 
607  bi0 = from[0];
608  from += 1;
609  n_left_from -= 1;
610 
611  b0 = vlib_get_buffer (vm, bi0);
612  h0 = vlib_buffer_get_current (b0);
613 
614  if (DHCPV6_MSG_RELAY_REPL != h0->msg_type)
615  {
616  error0 = DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
617 
618  drop_packet:
620  error0, 1);
621 
623  to_next0 = vlib_frame_vector_args (f0);
624  to_next0[0] = bi0;
625  f0->n_vectors = 1;
627  goto do_trace;
628  }
629  /* hop count seems not need to be checked */
630  if (HOP_COUNT_LIMIT < h0->hop_count)
631  {
633  goto drop_packet;
634  }
635  u0 = (void *) h0 - (sizeof (*u0));
636  ip0 = (void *) u0 - (sizeof (*ip0));
637 
638  vlib_buffer_advance (b0, sizeof (*h0));
639  o = vlib_buffer_get_current (b0);
640 
641  /* Parse through TLVs looking for option 18 (DHCPV6_OPTION_INTERFACE_ID)
642  _and_ option 9 (DHCPV6_OPTION_RELAY_MSG) option which must be there.
643  Currently assuming no other options need to be processed
644  The interface-ID is the FIB number we need
645  to track down the client-facing interface */
646 
647  while ((u8 *) o < (b0->data + b0->current_data + b0->current_length))
648  {
649  if (DHCPV6_OPTION_INTERFACE_ID == clib_net_to_host_u16 (o->option))
650  {
651  interface_opt_flag = 1;
652  if (clib_net_to_host_u16 (o->length) == sizeof (sw_if_index))
653  sw_if_index =
654  clib_net_to_host_u32 (((dhcpv6_int_id_t *) o)->int_idx);
655  if (sw_if_index >= vec_len (im->fib_index_by_sw_if_index))
656  {
657  error0 = DHCPV6_PROXY_ERROR_WRONG_INTERFACE_ID_OPTION;
658  goto drop_packet;
659  }
660  }
661  if (DHCPV6_OPTION_RELAY_MSG == clib_net_to_host_u16 (o->option))
662  {
663  relay_msg_opt_flag = 1;
664  r0 = vlib_buffer_get_current (b0);
665  }
666  if ((relay_msg_opt_flag == 1) && (interface_opt_flag == 1))
667  break;
669  sizeof (*o) +
670  clib_net_to_host_u16 (o->length));
671  o =
672  (dhcpv6_option_t *) (((uword) o) +
673  clib_net_to_host_u16 (o->length) +
674  sizeof (*o));
675  }
676 
677  if ((relay_msg_opt_flag == 0) || (r0 == 0))
678  {
679  error0 = DHCPV6_PROXY_ERROR_NO_RELAY_MESSAGE_OPTION;
680  goto drop_packet;
681  }
682 
683  if ((u32) ~ 0 == sw_if_index)
684  {
685  error0 = DHCPV6_PROXY_ERROR_NO_CIRCUIT_ID_OPTION;
686  goto drop_packet;
687  }
688 
689  //Advance buffer to start of encapsulated DHCPv6 message
690  vlib_buffer_advance (b0, sizeof (*r0));
691 
692  client_fib_idx = im->mfib_index_by_sw_if_index[sw_if_index];
693  proxy = dhcp_get_proxy (dm, client_fib_idx, FIB_PROTOCOL_IP6);
694 
695  if (NULL == proxy)
696  {
697  error0 = DHCPV6_PROXY_ERROR_NO_SERVER;
698  goto drop_packet;
699  }
700 
701  server_fib_idx = im->fib_index_by_sw_if_index
702  [vnet_buffer (b0)->sw_if_index[VLIB_RX]];
703 
704  vec_foreach (server, proxy->dhcp_servers)
705  {
706  if (server_fib_idx == server->server_fib_index &&
707  ip0->src_address.as_u64[0] == server->dhcp_server.ip6.as_u64[0] &&
708  ip0->src_address.as_u64[1] == server->dhcp_server.ip6.as_u64[1])
709  {
710  goto server_found;
711  }
712  }
713 
714  //drop packet if not from server with configured address or FIB
715  error0 = DHCPV6_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS;
716  goto drop_packet;
717 
718  server_found:
719  vnet_buffer (b0)->sw_if_index[VLIB_TX] = original_sw_if_index
720  = sw_if_index;
721 
722  swif = vnet_get_sw_interface (vnm, original_sw_if_index);
724  sw_if_index = swif->unnumbered_sw_if_index;
725 
726 
727  /*
728  * udp_local hands us the DHCPV6 header, need udp hdr,
729  * ip hdr to relay to client
730  */
731  vlib_buffer_advance (b0, -(sizeof (*u1)));
732  u1 = vlib_buffer_get_current (b0);
733 
734  vlib_buffer_advance (b0, -(sizeof (*ip1)));
735  ip1 = vlib_buffer_get_current (b0);
736 
737  copy_ip6_address (&client_address, &h0->peer_addr);
738 
739  ia0 = ip6_interface_first_address (&ip6_main, sw_if_index);
740  if (ia0 == 0)
741  {
742  error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
743  goto drop_packet;
744  }
745 
746  len = clib_net_to_host_u16 (r0->length);
747  clib_memset (ip1, 0, sizeof (*ip1));
748  copy_ip6_address (&ip1->dst_address, &client_address);
749  u1->checksum = 0;
750  u1->src_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_server);
751  u1->dst_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_client);
752  u1->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
753 
755  ip0->ip_version_traffic_class_and_flow_label & 0x00000fff;
756  ip1->payload_length = u1->length;
757  ip1->protocol = PROTO_UDP;
758  ip1->hop_limit = HOP_COUNT_LIMIT;
759  copy_ip6_address (&ip1->src_address, ia0);
760 
761  u1->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip1,
762  &bogus_length);
763  ASSERT (bogus_length == 0);
764 
765  vlib_buffer_advance (b0, -(sizeof (ethernet_header_t)));
766  si0 = vnet_get_sw_interface (vnm, original_sw_if_index);
767  if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
768  vlib_buffer_advance (b0, -4 /* space for VLAN tag */ );
769 
770  mac0 = vlib_buffer_get_current (b0);
771 
772  hi0 = vnet_get_sup_hw_interface (vnm, original_sw_if_index);
773  ei0 = pool_elt_at_index (em->interfaces, hi0->hw_instance);
774  clib_memcpy (mac0->src_address, ei0->address, sizeof (ei0->address));
775  clib_memset (&mac0->dst_address, 0xff, sizeof (mac0->dst_address));
776  mac0->type = (si0->type == VNET_SW_INTERFACE_TYPE_SUB) ?
777  clib_net_to_host_u16 (0x8100) : clib_net_to_host_u16 (0x86dd);
778 
779  if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
780  {
781  u32 *vlan_tag = (u32 *) (mac0 + 1);
782  u32 tmp;
783  tmp = (si0->sub.id << 16) | 0x0800;
784  *vlan_tag = clib_host_to_net_u32 (tmp);
785  }
786 
787  /* $$$ consider adding a dynamic next to the graph node, for performance */
789  to_next0 = vlib_frame_vector_args (f0);
790  to_next0[0] = bi0;
791  f0->n_vectors = 1;
793 
794  do_trace:
795  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
796  {
797  dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
798  b0, sizeof (*tr));
799  tr->which = 1; /* to client */
800  if (ia0)
802  tr->error = error0;
803  tr->original_sw_if_index = original_sw_if_index;
804  tr->sw_if_index = sw_if_index;
805  }
806  }
807  return from_frame->n_vectors;
808 
809 }
810 
811 /* *INDENT-OFF* */
813  .function = dhcpv6_proxy_to_client_input,
814  .name = "dhcpv6-proxy-to-client",
815  /* Takes a vector of packets. */
816  .vector_size = sizeof (u32),
817 
818  .n_errors = DHCPV6_PROXY_N_ERROR,
819  .error_strings = dhcpv6_proxy_error_strings,
821  .format_trace = format_dhcpv6_proxy_trace,
822 #if 0
823  .unformat_buffer = unformat_dhcpv6_proxy_header,
824 #endif
825 };
826 /* *INDENT-ON* */
827 
828 static clib_error_t *
830 {
833 
834  error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
835  dm->error_drop_node_index = error_drop_node->index;
836 
837  /* RFC says this is the dhcpv6 server address */
838  all_dhcpv6_server_address.as_u64[0] =
839  clib_host_to_net_u64 (0xFF05000000000000);
840  all_dhcpv6_server_address.as_u64[1] = clib_host_to_net_u64 (0x00010003);
841 
842  /* RFC says this is the server and agent address */
843  all_dhcpv6_server_relay_agent_address.as_u64[0] =
844  clib_host_to_net_u64 (0xFF02000000000000);
845  all_dhcpv6_server_relay_agent_address.as_u64[1] =
846  clib_host_to_net_u64 (0x00010002);
847 
848  return 0;
849 }
850 
852 
853 int
854 dhcp6_proxy_set_server (ip46_address_t * addr,
855  ip46_address_t * src_addr,
856  u32 rx_table_id, u32 server_table_id, int is_del)
857 {
859  u32 rx_fib_index = 0;
860  int rc = 0;
861 
862  const mfib_prefix_t all_dhcp_servers = {
863  .fp_len = 128,
864  .fp_proto = FIB_PROTOCOL_IP6,
865  .fp_grp_addr = {
867  }
868  };
869 
870  if (ip46_address_is_zero (addr))
871  return VNET_API_ERROR_INVALID_DST_ADDRESS;
872 
873  if (ip46_address_is_zero (src_addr))
874  return VNET_API_ERROR_INVALID_SRC_ADDRESS;
875 
877  rx_table_id,
879 
880  if (is_del)
881  {
882  if (dhcp_proxy_server_del (FIB_PROTOCOL_IP6, rx_fib_index,
883  addr, server_table_id))
884  {
885  mfib_table_entry_delete (rx_fib_index,
886  &all_dhcp_servers, MFIB_SOURCE_DHCP);
887  mfib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP6,
889 
890  udp_unregister_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
891  0 /* is_ip6 */ );
892  udp_unregister_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
893  0 /* is_ip6 */ );
894  }
895  }
896  else
897  {
898  const fib_route_path_t path_for_us = {
900  .frp_addr = zero_addr,
901  .frp_sw_if_index = 0xffffffff,
902  .frp_fib_index = ~0,
903  .frp_weight = 1,
904  .frp_flags = FIB_ROUTE_PATH_LOCAL,
905  .frp_mitf_flags = MFIB_ITF_FLAG_FORWARD,
906  };
907  if (dhcp_proxy_server_add (FIB_PROTOCOL_IP6, addr, src_addr,
908  rx_fib_index, server_table_id))
909  {
910  mfib_table_entry_path_update (rx_fib_index,
911  &all_dhcp_servers,
912  MFIB_SOURCE_DHCP, &path_for_us);
913  /*
914  * Each interface that is enabled in this table, needs to be added
915  * as an accepting interface, but this is not easily doable in VPP.
916  * So we cheat. Add a flag to the entry that indicates accept form
917  * any interface.
918  * We will still only accept on v6 enabled interfaces, since the
919  * input feature ensures this.
920  */
921  mfib_table_entry_update (rx_fib_index,
922  &all_dhcp_servers,
927 
928  udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
930  0 /* is_ip6 */ );
931  udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
933  0 /* is_ip6 */ );
934  }
935  }
936 
938 
939  return (rc);
940 }
941 
942 static clib_error_t *
944  unformat_input_t * input,
945  vlib_cli_command_t * cmd)
946 {
947  ip46_address_t addr, src_addr;
948  int set_server = 0, set_src_address = 0;
949  u32 rx_table_id = 0, server_table_id = 0;
950  int is_del = 0;
951 
953  {
954  if (unformat (input, "server %U", unformat_ip6_address, &addr.ip6))
955  set_server = 1;
956  else if (unformat (input, "src-address %U",
957  unformat_ip6_address, &src_addr.ip6))
958  set_src_address = 1;
959  else if (unformat (input, "server-fib-id %d", &server_table_id))
960  ;
961  else if (unformat (input, "rx-fib-id %d", &rx_table_id))
962  ;
963  else if (unformat (input, "delete") || unformat (input, "del"))
964  is_del = 1;
965  else
966  break;
967  }
968 
969  if (is_del || (set_server && set_src_address))
970  {
971  int rv;
972 
973  rv = dhcp6_proxy_set_server (&addr, &src_addr, rx_table_id,
974  server_table_id, is_del);
975 
976  //TODO: Complete the errors
977  switch (rv)
978  {
979  case 0:
980  return 0;
981 
982  case VNET_API_ERROR_INVALID_DST_ADDRESS:
983  return clib_error_return (0, "Invalid server address");
984 
985  case VNET_API_ERROR_INVALID_SRC_ADDRESS:
986  return clib_error_return (0, "Invalid src address");
987 
988  case VNET_API_ERROR_NO_SUCH_ENTRY:
989  return clib_error_return
990  (0, "Fib id %d: no per-fib DHCP server configured", rx_table_id);
991 
992  default:
993  return clib_error_return (0, "BUG: rv %d", rv);
994  }
995  }
996  else
997  return clib_error_return (0, "parse error`%U'",
998  format_unformat_error, input);
999 }
1000 
1001 /* *INDENT-OFF* */
1002 VLIB_CLI_COMMAND (dhcpv6_proxy_set_command, static) = {
1003  .path = "set dhcpv6 proxy",
1004  .short_help = "set dhcpv6 proxy [del] server <ipv6-addr> src-address <ipv6-addr> "
1005  "[server-fib-id <fib-id>] [rx-fib-id <fib-id>] ",
1006  .function = dhcpv6_proxy_set_command_fn,
1007 };
1008 /* *INDENT-ON* */
1009 
1010 static u8 *
1011 format_dhcp6_proxy_server (u8 * s, va_list * args)
1012 {
1013  dhcp_proxy_t *proxy = va_arg (*args, dhcp_proxy_t *);
1014  fib_table_t *server_fib;
1015  dhcp_server_t *server;
1016  ip6_mfib_t *rx_fib;
1017 
1018  if (proxy == 0)
1019  {
1020  s = format (s, "%=14s%=16s%s", "RX FIB", "Src Address",
1021  "Servers FIB,Address");
1022  return s;
1023  }
1024 
1025  rx_fib = ip6_mfib_get (proxy->rx_fib_index);
1026 
1027  s = format (s, "%=14u%=16U",
1028  rx_fib->table_id,
1030 
1031  vec_foreach (server, proxy->dhcp_servers)
1032  {
1033  server_fib = fib_table_get (server->server_fib_index, FIB_PROTOCOL_IP6);
1034  s = format (s, "%u,%U ",
1035  server_fib->ft_table_id,
1037  }
1038 
1039  return s;
1040 }
1041 
1042 static int
1044 {
1045  vlib_main_t *vm = ctx;
1046 
1047  vlib_cli_output (vm, "%U", format_dhcp6_proxy_server, proxy);
1048 
1049  return (1);
1050 }
1051 
1052 static clib_error_t *
1054  unformat_input_t * input,
1055  vlib_cli_command_t * cmd)
1056 {
1058  NULL /* header line */ );
1059 
1061 
1062  return (NULL);
1063 }
1064 
1065 /* *INDENT-OFF* */
1066 VLIB_CLI_COMMAND (dhcpv6_proxy_show_command, static) = {
1067  .path = "show dhcpv6 proxy",
1068  .short_help = "Display dhcpv6 proxy info",
1069  .function = dhcpv6_proxy_show_command_fn,
1070 };
1071 /* *INDENT-ON* */
1072 
1073 static clib_error_t *
1075  unformat_input_t * input, vlib_cli_command_t * cmd)
1076 {
1077  u8 is_del = 0, vss_type = VSS_TYPE_DEFAULT;
1078  u8 *vpn_ascii_id = 0;
1079  u32 oui = 0, fib_id = 0, tbl_id = ~0;
1080 
1081  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1082  {
1083  if (unformat (input, "table %d", &tbl_id))
1084  ;
1085  else if (unformat (input, "oui %d", &oui))
1086  vss_type = VSS_TYPE_VPN_ID;
1087  else if (unformat (input, "vpn-id %d", &fib_id))
1088  vss_type = VSS_TYPE_VPN_ID;
1089  else if (unformat (input, "vpn-ascii-id %s", &vpn_ascii_id))
1090  vss_type = VSS_TYPE_ASCII;
1091  else if (unformat (input, "delete") || unformat (input, "del"))
1092  is_del = 1;
1093  else
1094  break;
1095  }
1096 
1097  if (tbl_id == ~0)
1098  return clib_error_return (0, "no table ID specified.");
1099 
1100  int rv = dhcp_proxy_set_vss (FIB_PROTOCOL_IP6, tbl_id, vss_type,
1101  vpn_ascii_id, oui, fib_id, is_del);
1102  switch (rv)
1103  {
1104  case 0:
1105  return 0;
1106  case VNET_API_ERROR_NO_SUCH_ENTRY:
1107  return clib_error_return (0, "vss for table %d not found in pool.",
1108  tbl_id);
1109  default:
1110  return clib_error_return (0, "BUG: rv %d", rv);
1111  }
1112 }
1113 
1114 /* *INDENT-OFF* */
1115 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_command, static) = {
1116  .path = "set dhcpv6 vss",
1117  .short_help = "set dhcpv6 vss table <table-id> [oui <n> vpn-id <n> | vpn-ascii-id <text>]",
1118  .function = dhcpv6_vss_command_fn,
1119 };
1120 /* *INDENT-ON* */
1121 
1122 static clib_error_t *
1124  unformat_input_t * input,
1125  vlib_cli_command_t * cmd)
1126 {
1128 
1129  return (NULL);
1130 }
1131 
1132 /* *INDENT-OFF* */
1133 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_show_command, static) = {
1134  .path = "show dhcpv6 vss",
1135  .short_help = "show dhcpv6 VSS",
1136  .function = dhcpv6_vss_show_command_fn,
1137 };
1138 /* *INDENT-ON* */
1139 
1140 static clib_error_t *
1142  unformat_input_t * input,
1143  vlib_cli_command_t * cmd)
1144 {
1145  vnet_main_t *vnm = vnet_get_main ();
1146  u32 sw_if_index0 = 0, sw_if_index;
1147  vnet_sw_interface_t *swif;
1148  ip6_address_t *ia0;
1149 
1150  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1151  {
1152 
1153  if (unformat (input, "%U",
1154  unformat_vnet_sw_interface, vnm, &sw_if_index0))
1155  {
1156  swif = vnet_get_sw_interface (vnm, sw_if_index0);
1158  swif->unnumbered_sw_if_index : sw_if_index0;
1160  if (ia0)
1161  {
1162  vlib_cli_output (vm, "%=20s%=48s", "interface", "link-address");
1163 
1164  vlib_cli_output (vm, "%=20U%=48U",
1166  sw_if_index0, format_ip6_address, ia0);
1167  }
1168  else
1169  vlib_cli_output (vm, "%=34s%=20U",
1170  "No IPv6 address configured on",
1172  }
1173  else
1174  break;
1175  }
1176 
1177  return 0;
1178 }
1179 
1180 /* *INDENT-OFF* */
1181 VLIB_CLI_COMMAND (dhcpv6_proxy_address_show_command, static) = {
1182  .path = "show dhcpv6 link-address interface",
1183  .short_help = "show dhcpv6 link-address interface <interface>",
1185 };
1186 /* *INDENT-ON* */
1187 
1188 /*
1189  * fd.io coding-style-patch-verification: ON
1190  *
1191  * Local Variables:
1192  * eval: (c-set-style "gnu")
1193  * End:
1194  */
#define foreach_ip_interface_address(lm, a, sw_if_index, loop, body)
Definition: lookup.h:213
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
void mfib_table_entry_delete(u32 fib_index, const mfib_prefix_t *prefix, mfib_source_t source)
Delete a FIB entry.
Definition: mfib_table.c:491
static ip6_address_t all_dhcpv6_server_relay_agent_address
u32 mfib_table_find_or_create_and_lock(fib_protocol_t proto, u32 table_id, mfib_source_t src)
Get the index of the FIB for a Table-ID.
Definition: mfib_table.c:611
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:255
#define CLIB_UNUSED(x)
Definition: clib.h:83
a
Definition: bitmap.h:538
static u8 * format_dhcpv6_proxy_trace(u8 *s, va_list *args)
u32 * mfib_index_by_sw_if_index
Table index indexed by software interface.
Definition: ip6.h:197
A representation of a path as described by a route producer.
Definition: fib_types.h:485
static clib_error_t * dhcpv6_proxy_set_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
vnet_main_t * vnet_get_main(void)
Definition: misc.c:46
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:111
fib_node_index_t mfib_table_entry_path_update(u32 fib_index, const mfib_prefix_t *prefix, mfib_source_t source, const fib_route_path_t *rpath)
Add n paths to an entry (aka route) in the FIB.
Definition: mfib_table.c:323
static u8 * format_dhcpv6_proxy_header_with_length(u8 *s, va_list *args)
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
u8 as_u8[16]
Definition: ip6_packet.h:48
u64 as_u64[2]
Definition: ip6_packet.h:51
i16 current_data
signed offset in data[], pre_data[] that we are currently processing.
Definition: buffer.h:110
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
u32 index
Definition: node.h:280
dhcp_proxy_main_t dhcp_proxy_main
Shard 4/6 instance of DHCP main.
Definition: dhcp_proxy.c:25
static ip6_address_t all_dhcpv6_server_address
int dhcp6_proxy_set_server(ip46_address_t *addr, ip46_address_t *src_addr, u32 rx_table_id, u32 server_table_id, int is_del)
#define ethernet_buffer_header_size(b)
Determine the size of the Ethernet headers of the current frame in the buffer.
Definition: ethernet.h:420
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
u16 current_length
Nbytes between current data and the end of this buffer.
Definition: buffer.h:113
ip46_address_t dhcp_src_address
The source address to use in relayed messaes.
Definition: dhcp_proxy.h:126
The Virtual Sub-net Selection information for a given RX FIB.
Definition: dhcp_proxy.h:57
static clib_error_t * dhcpv6_vss_show_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
ip6_address_t * ip6_interface_first_address(ip6_main_t *im, u32 sw_if_index)
get first IPv6 interface address
Definition: ip6_forward.c:270
vl_api_address_t src
Definition: gre.api:51
static vlib_node_registration_t dhcpv6_proxy_to_server_node
(constructor) VLIB_REGISTER_NODE (dhcpv6_proxy_to_server_node)
u32 rx_fib_index
The FIB index (not the external Table-ID) in which the client is resides.
Definition: dhcp_proxy.h:132
format_function_t format_ip46_address
Definition: format.h:61
static vnet_sw_interface_t * vnet_get_sw_interface(vnet_main_t *vnm, u32 sw_if_index)
fib_node_index_t mfib_table_entry_update(u32 fib_index, const mfib_prefix_t *prefix, mfib_source_t source, fib_rpf_id_t rpf_id, mfib_entry_flags_t entry_flags)
Add a new (with no replication) or lock an existing entry.
Definition: mfib_table.c:235
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
dpo_proto_t frp_proto
The protocol of the address below.
Definition: fib_types.h:490
unformat_function_t unformat_vnet_sw_interface
vlib_node_registration_t error_drop_node
(constructor) VLIB_REGISTER_NODE (error_drop_node)
Definition: drop.c:258
static ip6_address_t * ip6_interface_first_global_or_site_address(ip6_main_t *im, u32 sw_if_index)
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:65
vhost_vring_addr_t addr
Definition: vhost_user.h:147
ip6_address_t src_address
Definition: ip6_packet.h:383
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:964
static clib_error_t * dhcp6_proxy_init(vlib_main_t *vm)
static char * dhcpv6_proxy_error_strings[]
#define clib_memcpy(d, s, n)
Definition: string.h:180
vl_api_interface_index_t sw_if_index
Definition: gre.api:50
#define MFIB_RPF_ID_NONE
Definition: fib_types.h:408
dhcpv6_proxy_to_server_input_next_t
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:173
u8 dst_address[6]
Definition: packet.h:55
vlib_frame_t * vlib_get_frame_to_node(vlib_main_t *vm, u32 to_node_index)
Definition: main.c:185
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:275
#define clib_error_return(e, args...)
Definition: error.h:99
#define VSS_TYPE_ASCII
Definition: dhcp_proxy.h:66
static clib_error_t * dhcpv6_vss_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
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
#define VSS_TYPE_DEFAULT
Definition: dhcp_proxy.h:69
static u32 vlib_get_buffer_index(vlib_main_t *vm, void *p)
Translate buffer pointer into buffer index.
Definition: buffer_funcs.h:257
static vlib_node_registration_t dhcpv6_proxy_to_client_node
(constructor) VLIB_REGISTER_NODE (dhcpv6_proxy_to_client_node)
#define foreach_dhcpv6_proxy_to_server_input_next
u32 server_fib_index
The FIB index (not the external Table-ID) in which the server is reachable.
Definition: dhcp_proxy.h:95
Collection of global DHCP proxy data.
Definition: dhcp_proxy.h:140
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:514
vnet_sub_interface_t sub
Definition: interface.h:723
static clib_error_t * dhcpv6_proxy_show_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
void mfib_table_unlock(u32 fib_index, fib_protocol_t proto, mfib_source_t source)
Take a reference counting lock on the table.
Definition: mfib_table.c:702
long ctx[MAX_CONNS]
Definition: main.c:144
struct _unformat_input_t unformat_input_t
unsigned short u16
Definition: types.h:57
void vlib_put_frame_to_node(vlib_main_t *vm, u32 to_node_index, vlib_frame_t *f)
Definition: main.c:194
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:112
vnet_sw_interface_flags_t flags
Definition: interface.h:703
#define HOP_COUNT_LIMIT
Definition: dhcp6_packet.h:28
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
void mfib_table_lock(u32 fib_index, fib_protocol_t proto, mfib_source_t source)
Release a reference counting lock on the table.
Definition: mfib_table.c:731
#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
vl_api_address_t dst
Definition: gre.api:52
#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
Definition: ip6.h:81
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1150
u8 len
Definition: ip_types.api:90
unformat_function_t unformat_ip6_address
Definition: format.h:91
static_always_inline u32 vlib_buffer_get_default_data_size(vlib_main_t *vm)
Definition: buffer_funcs.h:96
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
#define UNFORMAT_END_OF_INPUT
Definition: format.h:145
u8 * vpn_ascii_id
Type 0 ASCII VPN Identifier.
Definition: dhcp_proxy.h:77
u16 n_vectors
Definition: node.h:397
u32 ft_table_id
Table ID (hash key) for this FIB.
Definition: fib_table.h:89
format_function_t format_ip6_address
Definition: format.h:93
vlib_main_t * vm
Definition: buffer.c:323
void udp_unregister_dst_port(vlib_main_t *vm, udp_dst_port_t dst_port, u8 is_ip4)
Definition: udp_local.c:506
static clib_error_t * dhcpv6_link_address_show_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
u8 data[]
Packet data.
Definition: buffer.h:181
A representation of a single DHCP Server within a given VRF config.
Definition: dhcp_proxy.h:83
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
vlib_node_t * vlib_get_node_by_name(vlib_main_t *vm, u8 *name)
Definition: node.c:45
Aggregate type for a prefix.
Definition: mfib_types.h:24
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:161
u16 ip6_tcp_udp_icmp_compute_checksum(vlib_main_t *vm, vlib_buffer_t *p0, ip6_header_t *ip0, int *bogus_lengthp)
Definition: ip6_forward.c:1010
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:515
ip46_address_t dhcp_server
The address of the DHCP server to which to relay the client&#39;s messages.
Definition: dhcp_proxy.h:89
#define ASSERT(truth)
ip6_main_t ip6_main
Definition: ip6_forward.c:2805
ip_lookup_main_t lookup_main
Definition: ip6.h:179
u32 table_id
Definition: ip6.h:87
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:248
static vlib_main_t * vlib_get_main(void)
Definition: global_funcs.h:23
static void copy_ip6_address(ip6_address_t *dst, ip6_address_t *src)
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 representation fpr per-client VRF config.
Definition: dhcp_proxy.h:101
u32 ip_version_traffic_class_and_flow_label
Definition: ip6_packet.h:370
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
u16 payload_length
Definition: ip6_packet.h:374
A for-us/local path.
Definition: fib_types.h:338
#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:73
#define VLIB_BUFFER_TRACE_TRAJECTORY_INIT(b)
Definition: buffer.h:489
VLIB buffer representation.
Definition: buffer.h:102
u64 uword
Definition: types.h:112
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:244
#define VSS_TYPE_VPN_ID
Definition: dhcp_proxy.h:67
fib_table_t * fib_table_get(fib_node_index_t index, fib_protocol_t proto)
Get a pointer to a FIB table.
Definition: fib_table.c:27
static ethernet_main_t * vnet_get_ethernet_main(void)
Definition: ethernet.h:536
static ip6_mfib_t * ip6_mfib_get(u32 index)
Get the FIB at the given index.
Definition: ip6_mfib.h:72
#define vnet_buffer(b)
Definition: buffer.h:365
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
vnet_sw_interface_type_t type
Definition: interface.h:701
#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:468
static void * ip_interface_address_get_address(ip_lookup_main_t *lm, ip_interface_address_t *a)
Definition: lookup.h:199
u16 fp_len
The mask length.
Definition: mfib_types.h:28
ethernet_interface_t * interfaces
Definition: ethernet.h:272
static int dhcp6_proxy_show_walk(dhcp_proxy_t *proxy, void *ctx)
#define ip46_address_is_zero(ip46)
Definition: ip6_packet.h:93
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:772
u32 * fib_index_by_sw_if_index
Definition: ip6.h:194
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 u8 * format_dhcp6_proxy_server(u8 *s, va_list *args)
const ip46_address_t zero_addr
Definition: lookup.c:326
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:978
Definition: defs.h:46
ip6_address_t dst_address
Definition: ip6_packet.h:383
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:171
A protocol Independent FIB table.
Definition: fib_table.h:69
static uword dhcpv6_proxy_to_server_input(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
#define PROTO_UDP
Definition: dhcp6_packet.h:25
static uword dhcpv6_proxy_to_client_input(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)