FD.io VPP  v19.08-27-gf4dcae4
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_length + sizeof (*id1) + sizeof (*vss1) +
319  sizeof (*cmac)) > vlib_buffer_get_default_data_size (vm))
320  {
321  error0 = DHCPV6_PROXY_ERROR_PKT_TOO_BIG;
322  next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
323  pkts_too_big++;
324  goto do_trace;
325  }
326 
327  id1 = (dhcpv6_int_id_t *) (((uword) ip1) + b0->current_length);
328  b0->current_length += (sizeof (*id1));
329 
330  id1->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_INTERFACE_ID);
331  id1->opt.length = clib_host_to_net_u16 (sizeof (rx_sw_if_index));
332  id1->int_idx = clib_host_to_net_u32 (rx_sw_if_index);
333 
334  u1->length = 0;
335  if (h0->msg_type != DHCPV6_MSG_RELAY_FORW)
336  {
337  cmac =
338  (dhcpv6_client_mac_t *) (((uword) ip1) + b0->current_length);
339  b0->current_length += (sizeof (*cmac));
340  cmac->opt.length = clib_host_to_net_u16 (sizeof (*cmac) -
341  sizeof (cmac->opt));
342  cmac->opt.option =
343  clib_host_to_net_u16
344  (DHCPV6_OPTION_CLIENT_LINK_LAYER_ADDRESS);
345  cmac->link_type = clib_host_to_net_u16 (1); /* ethernet */
346  clib_memcpy (cmac->data, client_src_mac, 6);
347  u1->length += sizeof (*cmac);
348  }
349 
350  vss = dhcp_get_vss_info (dpm, rx_fib_idx, FIB_PROTOCOL_IP6);
351 
352  if (vss)
353  {
354  u16 id_len; /* length of VPN ID */
355  u16 type_len = sizeof (vss1->vss_type);
356 
357  vss1 = (dhcpv6_vss_t *) (((uword) ip1) + b0->current_length);
358  vss1->vss_type = vss->vss_type;
359  if (vss->vss_type == VSS_TYPE_VPN_ID)
360  {
361  id_len = sizeof (vss->vpn_id); /* vpn_id is 7 bytes */
362  memcpy (vss1->data, vss->vpn_id, id_len);
363  }
364  else if (vss->vss_type == VSS_TYPE_ASCII)
365  {
366  id_len = vec_len (vss->vpn_ascii_id);
367  memcpy (vss1->data, vss->vpn_ascii_id, id_len);
368  }
369  else /* must be VSS_TYPE_DEFAULT, no VPN ID */
370  id_len = 0;
371 
372  vss1->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_VSS);
373  vss1->opt.length = clib_host_to_net_u16 (type_len + id_len);
374  u1->length += type_len + id_len + sizeof (vss1->opt);
375  b0->current_length += type_len + id_len + sizeof (vss1->opt);
376  }
377 
378  pkts_to_server++;
379  u1->checksum = 0;
380  u1->src_port = clib_host_to_net_u16 (UDP_DST_PORT_dhcpv6_to_client);
381  u1->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_dhcpv6_to_server);
382 
383  u1->length =
384  clib_host_to_net_u16 (clib_net_to_host_u16 (fwd_opt->length) +
385  sizeof (*r1) + sizeof (*fwd_opt) +
386  sizeof (*u1) + sizeof (*id1) + u1->length);
387 
388  clib_memset (ip1, 0, sizeof (*ip1));
389  ip1->ip_version_traffic_class_and_flow_label = 0x60;
390  ip1->payload_length = u1->length;
391  ip1->protocol = PROTO_UDP;
392  ip1->hop_limit = HOP_COUNT_LIMIT;
393  src = ((server->dhcp_server.ip6.as_u64[0] ||
394  server->dhcp_server.ip6.as_u64[1]) ?
395  &server->dhcp_server.ip6 : &all_dhcpv6_server_address);
396  copy_ip6_address (&ip1->dst_address, src);
397 
398 
400  (&ip6_main, vnet_buffer (b0)->sw_if_index[VLIB_RX]);
401 
402  src = (proxy->dhcp_src_address.ip6.as_u64[0] ||
403  proxy->dhcp_src_address.ip6.as_u64[1]) ?
404  &proxy->dhcp_src_address.ip6 : ia0;
405  if (ia0 == 0)
406  {
407  error0 = DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS;
408  next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
409  pkts_no_src_address++;
410  goto do_trace;
411  }
412 
413  copy_ip6_address (&ip1->src_address, src);
414 
415 
416  u1->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip1,
417  &bogus_length);
418  ASSERT (bogus_length == 0);
419 
420  next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP;
421 
422  is_solicit = (DHCPV6_MSG_SOLICIT == h0->msg_type);
423 
424  /*
425  * If we have multiple servers configured and this is the
426  * client's discover message, then send copies to each of
427  * those servers
428  */
429  if (is_solicit && vec_len (proxy->dhcp_servers) > 1)
430  {
431  u32 ii;
432 
433  for (ii = 1; ii < vec_len (proxy->dhcp_servers); ii++)
434  {
435  vlib_buffer_t *c0;
436  u32 ci0;
437 
438  c0 = vlib_buffer_copy (vm, b0);
440  ci0 = vlib_get_buffer_index (vm, c0);
441  server = &proxy->dhcp_servers[ii];
442 
443  ip0 = vlib_buffer_get_current (c0);
444 
445  src = ((server->dhcp_server.ip6.as_u64[0] ||
446  server->dhcp_server.ip6.as_u64[1]) ?
447  &server->dhcp_server.ip6 :
448  &all_dhcpv6_server_address);
449  copy_ip6_address (&ip1->dst_address, src);
450 
451  to_next[0] = ci0;
452  to_next += 1;
453  n_left_to_next -= 1;
454 
455  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
456  to_next, n_left_to_next,
457  ci0, next0);
458 
459  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
460  {
462 
463  tr = vlib_add_trace (vm, node, c0, sizeof (*tr));
464  tr->which = 0; /* to server */
465  tr->error = error0;
466  tr->original_sw_if_index = rx_sw_if_index;
467  tr->sw_if_index = sw_if_index;
468  if (next0 == DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP)
470  tr->packet_data[0],
471  &server->dhcp_server.ip6);
472  }
473 
474  if (PREDICT_FALSE (0 == n_left_to_next))
475  {
476  vlib_put_next_frame (vm, node, next_index,
477  n_left_to_next);
478  vlib_get_next_frame (vm, node, next_index,
479  to_next, n_left_to_next);
480  }
481  }
482  }
483 
484  do_trace:
485  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
486  {
487  dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
488  b0, sizeof (*tr));
489  tr->which = 0; /* to server */
490  tr->error = error0;
491  tr->original_sw_if_index = rx_sw_if_index;
492  tr->sw_if_index = sw_if_index;
493  if (DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP == next0)
495  &server->dhcp_server.ip6);
496  }
497 
498  do_enqueue:
499  to_next[0] = bi0;
500  to_next += 1;
501  n_left_to_next -= 1;
502 
503  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
504  to_next, n_left_to_next,
505  bi0, next0);
506  }
507 
508  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
509  }
510 
512  DHCPV6_PROXY_ERROR_RELAY_TO_CLIENT,
513  pkts_to_client);
515  DHCPV6_PROXY_ERROR_RELAY_TO_SERVER,
516  pkts_to_server);
518  DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS,
519  pkts_no_interface_address);
521  DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE,
522  pkts_wrong_msg_type);
524  DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS,
525  pkts_no_src_address);
527  DHCPV6_PROXY_ERROR_PKT_TOO_BIG, pkts_too_big);
528  return from_frame->n_vectors;
529 }
530 
531 /* *INDENT-OFF* */
533  .function = dhcpv6_proxy_to_server_input,
534  .name = "dhcpv6-proxy-to-server",
535  /* Takes a vector of packets. */
536  .vector_size = sizeof (u32),
537 
538  .n_errors = DHCPV6_PROXY_N_ERROR,
539  .error_strings = dhcpv6_proxy_error_strings,
540 
541  .n_next_nodes = DHCPV6_PROXY_TO_SERVER_INPUT_N_NEXT,
542  .next_nodes = {
543 #define _(s,n) [DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s] = n,
545 #undef _
546  },
547 
549  .format_trace = format_dhcpv6_proxy_trace,
550 #if 0
551  .unformat_buffer = unformat_dhcpv6_proxy_header,
552 #endif
553 };
554 /* *INDENT-ON* */
555 
556 static uword
558  vlib_node_runtime_t * node,
559  vlib_frame_t * from_frame)
560 {
561 
562  u32 n_left_from, *from;
565  dhcp_proxy_t *proxy;
566  dhcp_server_t *server;
567  vnet_main_t *vnm = vnet_get_main ();
568  int bogus_length;
569 
570  from = vlib_frame_vector_args (from_frame);
571  n_left_from = from_frame->n_vectors;
572 
573  while (n_left_from > 0)
574  {
575  u32 bi0;
576  vlib_buffer_t *b0;
577  udp_header_t *u0, *u1 = 0;
578  dhcpv6_relay_hdr_t *h0;
579  ip6_header_t *ip1 = 0, *ip0;
580  ip6_address_t _ia0, *ia0 = &_ia0;
581  ip6_address_t client_address;
583  ethernet_header_t *mac0;
584  vnet_hw_interface_t *hi0;
585  vlib_frame_t *f0;
586  u32 *to_next0;
587  u32 sw_if_index = ~0;
588  u32 original_sw_if_index = ~0;
589  vnet_sw_interface_t *si0;
590  u32 error0 = (u32) ~ 0;
591  vnet_sw_interface_t *swif;
592  dhcpv6_option_t *r0 = 0, *o;
593  u16 len = 0;
594  u8 interface_opt_flag = 0;
595  u8 relay_msg_opt_flag = 0;
596  ip6_main_t *im = &ip6_main;
597  u32 server_fib_idx, client_fib_idx;
598 
599  bi0 = from[0];
600  from += 1;
601  n_left_from -= 1;
602 
603  b0 = vlib_get_buffer (vm, bi0);
604  h0 = vlib_buffer_get_current (b0);
605 
606  if (DHCPV6_MSG_RELAY_REPL != h0->msg_type)
607  {
608  error0 = DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
609 
610  drop_packet:
612  error0, 1);
613 
615  to_next0 = vlib_frame_vector_args (f0);
616  to_next0[0] = bi0;
617  f0->n_vectors = 1;
619  goto do_trace;
620  }
621  /* hop count seems not need to be checked */
622  if (HOP_COUNT_LIMIT < h0->hop_count)
623  {
625  goto drop_packet;
626  }
627  u0 = (void *) h0 - (sizeof (*u0));
628  ip0 = (void *) u0 - (sizeof (*ip0));
629 
630  vlib_buffer_advance (b0, sizeof (*h0));
631  o = vlib_buffer_get_current (b0);
632 
633  /* Parse through TLVs looking for option 18 (DHCPV6_OPTION_INTERFACE_ID)
634  _and_ option 9 (DHCPV6_OPTION_RELAY_MSG) option which must be there.
635  Currently assuming no other options need to be processed
636  The interface-ID is the FIB number we need
637  to track down the client-facing interface */
638 
639  while ((u8 *) o < (b0->data + b0->current_data + b0->current_length))
640  {
641  if (DHCPV6_OPTION_INTERFACE_ID == clib_net_to_host_u16 (o->option))
642  {
643  interface_opt_flag = 1;
644  if (clib_net_to_host_u16 (o->length) == sizeof (sw_if_index))
645  sw_if_index =
646  clib_net_to_host_u32 (((dhcpv6_int_id_t *) o)->int_idx);
647  if (sw_if_index >= vec_len (im->fib_index_by_sw_if_index))
648  {
649  error0 = DHCPV6_PROXY_ERROR_WRONG_INTERFACE_ID_OPTION;
650  goto drop_packet;
651  }
652  }
653  if (DHCPV6_OPTION_RELAY_MSG == clib_net_to_host_u16 (o->option))
654  {
655  relay_msg_opt_flag = 1;
656  r0 = vlib_buffer_get_current (b0);
657  }
658  if ((relay_msg_opt_flag == 1) && (interface_opt_flag == 1))
659  break;
661  sizeof (*o) +
662  clib_net_to_host_u16 (o->length));
663  o =
664  (dhcpv6_option_t *) (((uword) o) +
665  clib_net_to_host_u16 (o->length) +
666  sizeof (*o));
667  }
668 
669  if ((relay_msg_opt_flag == 0) || (r0 == 0))
670  {
671  error0 = DHCPV6_PROXY_ERROR_NO_RELAY_MESSAGE_OPTION;
672  goto drop_packet;
673  }
674 
675  if ((u32) ~ 0 == sw_if_index)
676  {
677  error0 = DHCPV6_PROXY_ERROR_NO_CIRCUIT_ID_OPTION;
678  goto drop_packet;
679  }
680 
681  //Advance buffer to start of encapsulated DHCPv6 message
682  vlib_buffer_advance (b0, sizeof (*r0));
683 
684  client_fib_idx = im->mfib_index_by_sw_if_index[sw_if_index];
685  proxy = dhcp_get_proxy (dm, client_fib_idx, FIB_PROTOCOL_IP6);
686 
687  if (NULL == proxy)
688  {
689  error0 = DHCPV6_PROXY_ERROR_NO_SERVER;
690  goto drop_packet;
691  }
692 
693  server_fib_idx = im->fib_index_by_sw_if_index
694  [vnet_buffer (b0)->sw_if_index[VLIB_RX]];
695 
696  vec_foreach (server, proxy->dhcp_servers)
697  {
698  if (server_fib_idx == server->server_fib_index &&
699  ip0->src_address.as_u64[0] == server->dhcp_server.ip6.as_u64[0] &&
700  ip0->src_address.as_u64[1] == server->dhcp_server.ip6.as_u64[1])
701  {
702  goto server_found;
703  }
704  }
705 
706  //drop packet if not from server with configured address or FIB
707  error0 = DHCPV6_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS;
708  goto drop_packet;
709 
710  server_found:
711  vnet_buffer (b0)->sw_if_index[VLIB_TX] = original_sw_if_index
712  = sw_if_index;
713 
714  swif = vnet_get_sw_interface (vnm, original_sw_if_index);
716  sw_if_index = swif->unnumbered_sw_if_index;
717 
718 
719  /*
720  * udp_local hands us the DHCPV6 header, need udp hdr,
721  * ip hdr to relay to client
722  */
723  vlib_buffer_advance (b0, -(sizeof (*u1)));
724  u1 = vlib_buffer_get_current (b0);
725 
726  vlib_buffer_advance (b0, -(sizeof (*ip1)));
727  ip1 = vlib_buffer_get_current (b0);
728 
729  copy_ip6_address (&client_address, &h0->peer_addr);
730 
731  ia0 = ip6_interface_first_address (&ip6_main, sw_if_index);
732  if (ia0 == 0)
733  {
734  error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
735  goto drop_packet;
736  }
737 
738  len = clib_net_to_host_u16 (r0->length);
739  clib_memset (ip1, 0, sizeof (*ip1));
740  copy_ip6_address (&ip1->dst_address, &client_address);
741  u1->checksum = 0;
742  u1->src_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_server);
743  u1->dst_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_client);
744  u1->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
745 
747  ip0->ip_version_traffic_class_and_flow_label & 0x00000fff;
748  ip1->payload_length = u1->length;
749  ip1->protocol = PROTO_UDP;
750  ip1->hop_limit = HOP_COUNT_LIMIT;
751  copy_ip6_address (&ip1->src_address, ia0);
752 
753  u1->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip1,
754  &bogus_length);
755  ASSERT (bogus_length == 0);
756 
757  vlib_buffer_advance (b0, -(sizeof (ethernet_header_t)));
758  si0 = vnet_get_sw_interface (vnm, original_sw_if_index);
759  if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
760  vlib_buffer_advance (b0, -4 /* space for VLAN tag */ );
761 
762  mac0 = vlib_buffer_get_current (b0);
763 
764  hi0 = vnet_get_sup_hw_interface (vnm, original_sw_if_index);
765  ei0 = pool_elt_at_index (em->interfaces, hi0->hw_instance);
766  clib_memcpy (mac0->src_address, ei0->address, sizeof (ei0->address));
767  clib_memset (&mac0->dst_address, 0xff, sizeof (mac0->dst_address));
768  mac0->type = (si0->type == VNET_SW_INTERFACE_TYPE_SUB) ?
769  clib_net_to_host_u16 (0x8100) : clib_net_to_host_u16 (0x86dd);
770 
771  if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
772  {
773  u32 *vlan_tag = (u32 *) (mac0 + 1);
774  u32 tmp;
775  tmp = (si0->sub.id << 16) | 0x0800;
776  *vlan_tag = clib_host_to_net_u32 (tmp);
777  }
778 
779  /* $$$ consider adding a dynamic next to the graph node, for performance */
781  to_next0 = vlib_frame_vector_args (f0);
782  to_next0[0] = bi0;
783  f0->n_vectors = 1;
785 
786  do_trace:
787  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
788  {
789  dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
790  b0, sizeof (*tr));
791  tr->which = 1; /* to client */
792  if (ia0)
794  tr->error = error0;
795  tr->original_sw_if_index = original_sw_if_index;
796  tr->sw_if_index = sw_if_index;
797  }
798  }
799  return from_frame->n_vectors;
800 
801 }
802 
803 /* *INDENT-OFF* */
805  .function = dhcpv6_proxy_to_client_input,
806  .name = "dhcpv6-proxy-to-client",
807  /* Takes a vector of packets. */
808  .vector_size = sizeof (u32),
809 
810  .n_errors = DHCPV6_PROXY_N_ERROR,
811  .error_strings = dhcpv6_proxy_error_strings,
813  .format_trace = format_dhcpv6_proxy_trace,
814 #if 0
815  .unformat_buffer = unformat_dhcpv6_proxy_header,
816 #endif
817 };
818 /* *INDENT-ON* */
819 
820 static clib_error_t *
822 {
825 
826  error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
827  dm->error_drop_node_index = error_drop_node->index;
828 
829  /* RFC says this is the dhcpv6 server address */
830  all_dhcpv6_server_address.as_u64[0] =
831  clib_host_to_net_u64 (0xFF05000000000000);
832  all_dhcpv6_server_address.as_u64[1] = clib_host_to_net_u64 (0x00010003);
833 
834  /* RFC says this is the server and agent address */
835  all_dhcpv6_server_relay_agent_address.as_u64[0] =
836  clib_host_to_net_u64 (0xFF02000000000000);
837  all_dhcpv6_server_relay_agent_address.as_u64[1] =
838  clib_host_to_net_u64 (0x00010002);
839 
840  return 0;
841 }
842 
844 
845 int
846 dhcp6_proxy_set_server (ip46_address_t * addr,
847  ip46_address_t * src_addr,
848  u32 rx_table_id, u32 server_table_id, int is_del)
849 {
851  u32 rx_fib_index = 0;
852  int rc = 0;
853 
854  const mfib_prefix_t all_dhcp_servers = {
855  .fp_len = 128,
856  .fp_proto = FIB_PROTOCOL_IP6,
857  .fp_grp_addr = {
859  }
860  };
861 
862  if (ip46_address_is_zero (addr))
863  return VNET_API_ERROR_INVALID_DST_ADDRESS;
864 
865  if (ip46_address_is_zero (src_addr))
866  return VNET_API_ERROR_INVALID_SRC_ADDRESS;
867 
869  rx_table_id,
871 
872  if (is_del)
873  {
874  if (dhcp_proxy_server_del (FIB_PROTOCOL_IP6, rx_fib_index,
875  addr, server_table_id))
876  {
877  mfib_table_entry_delete (rx_fib_index,
878  &all_dhcp_servers, MFIB_SOURCE_DHCP);
879  mfib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP6,
881 
882  udp_unregister_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
883  0 /* is_ip6 */ );
884  udp_unregister_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
885  0 /* is_ip6 */ );
886  }
887  }
888  else
889  {
890  const fib_route_path_t path_for_us = {
892  .frp_addr = zero_addr,
893  .frp_sw_if_index = 0xffffffff,
894  .frp_fib_index = ~0,
895  .frp_weight = 1,
896  .frp_flags = FIB_ROUTE_PATH_LOCAL,
897  .frp_mitf_flags = MFIB_ITF_FLAG_FORWARD,
898  };
899  if (dhcp_proxy_server_add (FIB_PROTOCOL_IP6, addr, src_addr,
900  rx_fib_index, server_table_id))
901  {
902  mfib_table_entry_path_update (rx_fib_index,
903  &all_dhcp_servers,
904  MFIB_SOURCE_DHCP, &path_for_us);
905  /*
906  * Each interface that is enabled in this table, needs to be added
907  * as an accepting interface, but this is not easily doable in VPP.
908  * So we cheat. Add a flag to the entry that indicates accept form
909  * any interface.
910  * We will still only accept on v6 enabled interfaces, since the
911  * input feature ensures this.
912  */
913  mfib_table_entry_update (rx_fib_index,
914  &all_dhcp_servers,
919 
920  udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
922  0 /* is_ip6 */ );
923  udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
925  0 /* is_ip6 */ );
926  }
927  }
928 
930 
931  return (rc);
932 }
933 
934 static clib_error_t *
936  unformat_input_t * input,
937  vlib_cli_command_t * cmd)
938 {
939  ip46_address_t addr, src_addr;
940  int set_server = 0, set_src_address = 0;
941  u32 rx_table_id = 0, server_table_id = 0;
942  int is_del = 0;
943 
945  {
946  if (unformat (input, "server %U", unformat_ip6_address, &addr.ip6))
947  set_server = 1;
948  else if (unformat (input, "src-address %U",
949  unformat_ip6_address, &src_addr.ip6))
950  set_src_address = 1;
951  else if (unformat (input, "server-fib-id %d", &server_table_id))
952  ;
953  else if (unformat (input, "rx-fib-id %d", &rx_table_id))
954  ;
955  else if (unformat (input, "delete") || unformat (input, "del"))
956  is_del = 1;
957  else
958  break;
959  }
960 
961  if (is_del || (set_server && set_src_address))
962  {
963  int rv;
964 
965  rv = dhcp6_proxy_set_server (&addr, &src_addr, rx_table_id,
966  server_table_id, is_del);
967 
968  //TODO: Complete the errors
969  switch (rv)
970  {
971  case 0:
972  return 0;
973 
974  case VNET_API_ERROR_INVALID_DST_ADDRESS:
975  return clib_error_return (0, "Invalid server address");
976 
977  case VNET_API_ERROR_INVALID_SRC_ADDRESS:
978  return clib_error_return (0, "Invalid src address");
979 
980  case VNET_API_ERROR_NO_SUCH_ENTRY:
981  return clib_error_return
982  (0, "Fib id %d: no per-fib DHCP server configured", rx_table_id);
983 
984  default:
985  return clib_error_return (0, "BUG: rv %d", rv);
986  }
987  }
988  else
989  return clib_error_return (0, "parse error`%U'",
990  format_unformat_error, input);
991 }
992 
993 /* *INDENT-OFF* */
994 VLIB_CLI_COMMAND (dhcpv6_proxy_set_command, static) = {
995  .path = "set dhcpv6 proxy",
996  .short_help = "set dhcpv6 proxy [del] server <ipv6-addr> src-address <ipv6-addr> "
997  "[server-fib-id <fib-id>] [rx-fib-id <fib-id>] ",
998  .function = dhcpv6_proxy_set_command_fn,
999 };
1000 /* *INDENT-ON* */
1001 
1002 static u8 *
1003 format_dhcp6_proxy_server (u8 * s, va_list * args)
1004 {
1005  dhcp_proxy_t *proxy = va_arg (*args, dhcp_proxy_t *);
1006  fib_table_t *server_fib;
1007  dhcp_server_t *server;
1008  ip6_mfib_t *rx_fib;
1009 
1010  if (proxy == 0)
1011  {
1012  s = format (s, "%=14s%=16s%s", "RX FIB", "Src Address",
1013  "Servers FIB,Address");
1014  return s;
1015  }
1016 
1017  rx_fib = ip6_mfib_get (proxy->rx_fib_index);
1018 
1019  s = format (s, "%=14u%=16U",
1020  rx_fib->table_id,
1022 
1023  vec_foreach (server, proxy->dhcp_servers)
1024  {
1025  server_fib = fib_table_get (server->server_fib_index, FIB_PROTOCOL_IP6);
1026  s = format (s, "%u,%U ",
1027  server_fib->ft_table_id,
1029  }
1030 
1031  return s;
1032 }
1033 
1034 static int
1036 {
1037  vlib_main_t *vm = ctx;
1038 
1039  vlib_cli_output (vm, "%U", format_dhcp6_proxy_server, proxy);
1040 
1041  return (1);
1042 }
1043 
1044 static clib_error_t *
1046  unformat_input_t * input,
1047  vlib_cli_command_t * cmd)
1048 {
1050  NULL /* header line */ );
1051 
1053 
1054  return (NULL);
1055 }
1056 
1057 /* *INDENT-OFF* */
1058 VLIB_CLI_COMMAND (dhcpv6_proxy_show_command, static) = {
1059  .path = "show dhcpv6 proxy",
1060  .short_help = "Display dhcpv6 proxy info",
1061  .function = dhcpv6_proxy_show_command_fn,
1062 };
1063 /* *INDENT-ON* */
1064 
1065 static clib_error_t *
1067  unformat_input_t * input, vlib_cli_command_t * cmd)
1068 {
1069  u8 is_del = 0, vss_type = VSS_TYPE_DEFAULT;
1070  u8 *vpn_ascii_id = 0;
1071  u32 oui = 0, fib_id = 0, tbl_id = ~0;
1072 
1073  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1074  {
1075  if (unformat (input, "table %d", &tbl_id))
1076  ;
1077  else if (unformat (input, "oui %d", &oui))
1078  vss_type = VSS_TYPE_VPN_ID;
1079  else if (unformat (input, "vpn-id %d", &fib_id))
1080  vss_type = VSS_TYPE_VPN_ID;
1081  else if (unformat (input, "vpn-ascii-id %s", &vpn_ascii_id))
1082  vss_type = VSS_TYPE_ASCII;
1083  else if (unformat (input, "delete") || unformat (input, "del"))
1084  is_del = 1;
1085  else
1086  break;
1087  }
1088 
1089  if (tbl_id == ~0)
1090  return clib_error_return (0, "no table ID specified.");
1091 
1092  int rv = dhcp_proxy_set_vss (FIB_PROTOCOL_IP6, tbl_id, vss_type,
1093  vpn_ascii_id, oui, fib_id, is_del);
1094  switch (rv)
1095  {
1096  case 0:
1097  return 0;
1098  case VNET_API_ERROR_NO_SUCH_ENTRY:
1099  return clib_error_return (0, "vss for table %d not found in pool.",
1100  tbl_id);
1101  default:
1102  return clib_error_return (0, "BUG: rv %d", rv);
1103  }
1104 }
1105 
1106 /* *INDENT-OFF* */
1107 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_command, static) = {
1108  .path = "set dhcpv6 vss",
1109  .short_help = "set dhcpv6 vss table <table-id> [oui <n> vpn-id <n> | vpn-ascii-id <text>]",
1110  .function = dhcpv6_vss_command_fn,
1111 };
1112 /* *INDENT-ON* */
1113 
1114 static clib_error_t *
1116  unformat_input_t * input,
1117  vlib_cli_command_t * cmd)
1118 {
1120 
1121  return (NULL);
1122 }
1123 
1124 /* *INDENT-OFF* */
1125 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_show_command, static) = {
1126  .path = "show dhcpv6 vss",
1127  .short_help = "show dhcpv6 VSS",
1128  .function = dhcpv6_vss_show_command_fn,
1129 };
1130 /* *INDENT-ON* */
1131 
1132 static clib_error_t *
1134  unformat_input_t * input,
1135  vlib_cli_command_t * cmd)
1136 {
1137  vnet_main_t *vnm = vnet_get_main ();
1138  u32 sw_if_index0 = 0, sw_if_index;
1139  vnet_sw_interface_t *swif;
1140  ip6_address_t *ia0;
1141 
1142  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1143  {
1144 
1145  if (unformat (input, "%U",
1146  unformat_vnet_sw_interface, vnm, &sw_if_index0))
1147  {
1148  swif = vnet_get_sw_interface (vnm, sw_if_index0);
1150  swif->unnumbered_sw_if_index : sw_if_index0;
1152  if (ia0)
1153  {
1154  vlib_cli_output (vm, "%=20s%=48s", "interface", "link-address");
1155 
1156  vlib_cli_output (vm, "%=20U%=48U",
1158  sw_if_index0, format_ip6_address, ia0);
1159  }
1160  else
1161  vlib_cli_output (vm, "%=34s%=20U",
1162  "No IPv6 address configured on",
1164  }
1165  else
1166  break;
1167  }
1168 
1169  return 0;
1170 }
1171 
1172 /* *INDENT-OFF* */
1173 VLIB_CLI_COMMAND (dhcpv6_proxy_address_show_command, static) = {
1174  .path = "show dhcpv6 link-address interface",
1175  .short_help = "show dhcpv6 link-address interface <interface>",
1177 };
1178 /* *INDENT-ON* */
1179 
1180 /*
1181  * fd.io coding-style-patch-verification: ON
1182  *
1183  * Local Variables:
1184  * eval: (c-set-style "gnu")
1185  * End:
1186  */
#define foreach_ip_interface_address(lm, a, sw_if_index, loop, body)
Definition: lookup.h:182
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:82
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:479
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
#define NULL
Definition: clib.h:58
u32 index
Definition: node.h:279
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
u8 data[0]
Packet data.
Definition: buffer.h:181
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:178
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
clib_memset(h->entries, 0, sizeof(h->entries[0])*entries)
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:484
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:402
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:187
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:719
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:196
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:111
vnet_sw_interface_flags_t flags
Definition: interface.h:699
#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:395
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:312
void udp_unregister_dst_port(vlib_main_t *vm, udp_dst_port_t dst_port, u8 is_ip4)
Definition: udp_local.c:509
static clib_error_t * dhcpv6_link_address_show_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
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:458
vlib_node_t * vlib_get_node_by_name(vlib_main_t *vm, u8 *name)
Definition: node.c:45
Aggregrate type for a prefix.
Definition: mfib_types.h:24
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:155
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:906
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:513
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:2671
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 represenation 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:332
#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:361
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
vnet_sw_interface_type_t type
Definition: interface.h:697
#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:471
static void * ip_interface_address_get_address(ip_lookup_main_t *lm, ip_interface_address_t *a)
Definition: lookup.h:175
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:768
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:319
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)