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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  vlib_buffer_copy_trace_flag (vm, b0, ci0);
464  tr = vlib_add_trace (vm, node, c0, sizeof (*tr));
465  tr->which = 0; /* to server */
466  tr->error = error0;
467  tr->original_sw_if_index = rx_sw_if_index;
468  tr->sw_if_index = sw_if_index;
469  if (next0 == DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP)
471  tr->packet_data[0],
472  &server->dhcp_server.ip6);
473  }
474 
475  if (PREDICT_FALSE (0 == n_left_to_next))
476  {
477  vlib_put_next_frame (vm, node, next_index,
478  n_left_to_next);
479  vlib_get_next_frame (vm, node, next_index,
480  to_next, n_left_to_next);
481  }
482  }
483  }
484 
485  do_trace:
486  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
487  {
488  dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
489  b0, sizeof (*tr));
490  tr->which = 0; /* to server */
491  tr->error = error0;
492  tr->original_sw_if_index = rx_sw_if_index;
493  tr->sw_if_index = sw_if_index;
494  if (DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP == next0)
496  &server->dhcp_server.ip6);
497  }
498 
499  do_enqueue:
500  to_next[0] = bi0;
501  to_next += 1;
502  n_left_to_next -= 1;
503 
504  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
505  to_next, n_left_to_next,
506  bi0, next0);
507  }
508 
509  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
510  }
511 
513  DHCPV6_PROXY_ERROR_RELAY_TO_CLIENT,
514  pkts_to_client);
516  DHCPV6_PROXY_ERROR_RELAY_TO_SERVER,
517  pkts_to_server);
519  DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS,
520  pkts_no_interface_address);
522  DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE,
523  pkts_wrong_msg_type);
525  DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS,
526  pkts_no_src_address);
528  DHCPV6_PROXY_ERROR_PKT_TOO_BIG, pkts_too_big);
529  return from_frame->n_vectors;
530 }
531 
532 /* *INDENT-OFF* */
534  .function = dhcpv6_proxy_to_server_input,
535  .name = "dhcpv6-proxy-to-server",
536  /* Takes a vector of packets. */
537  .vector_size = sizeof (u32),
538 
539  .n_errors = DHCPV6_PROXY_N_ERROR,
540  .error_strings = dhcpv6_proxy_error_strings,
541 
542  .n_next_nodes = DHCPV6_PROXY_TO_SERVER_INPUT_N_NEXT,
543  .next_nodes = {
544 #define _(s,n) [DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s] = n,
546 #undef _
547  },
548 
550  .format_trace = format_dhcpv6_proxy_trace,
551 #if 0
552  .unformat_buffer = unformat_dhcpv6_proxy_header,
553 #endif
554 };
555 /* *INDENT-ON* */
556 
557 static uword
559  vlib_node_runtime_t * node,
560  vlib_frame_t * from_frame)
561 {
562 
563  u32 n_left_from, *from;
566  dhcp_proxy_t *proxy;
567  dhcp_server_t *server;
568  vnet_main_t *vnm = vnet_get_main ();
569  int bogus_length;
570 
571  from = vlib_frame_vector_args (from_frame);
572  n_left_from = from_frame->n_vectors;
573 
574  while (n_left_from > 0)
575  {
576  u32 bi0;
577  vlib_buffer_t *b0;
578  udp_header_t *u0, *u1 = 0;
579  dhcpv6_relay_hdr_t *h0;
580  ip6_header_t *ip1 = 0, *ip0;
581  ip6_address_t _ia0, *ia0 = &_ia0;
582  ip6_address_t client_address;
584  ethernet_header_t *mac0;
585  vnet_hw_interface_t *hi0;
586  vlib_frame_t *f0;
587  u32 *to_next0;
588  u32 sw_if_index = ~0;
589  u32 original_sw_if_index = ~0;
590  vnet_sw_interface_t *si0;
591  u32 error0 = (u32) ~ 0;
592  vnet_sw_interface_t *swif;
593  dhcpv6_option_t *r0 = 0, *o;
594  u16 len = 0;
595  u8 interface_opt_flag = 0;
596  u8 relay_msg_opt_flag = 0;
597  ip6_main_t *im = &ip6_main;
598  u32 server_fib_idx, client_fib_idx;
599 
600  bi0 = from[0];
601  from += 1;
602  n_left_from -= 1;
603 
604  b0 = vlib_get_buffer (vm, bi0);
605  h0 = vlib_buffer_get_current (b0);
606 
607  if (DHCPV6_MSG_RELAY_REPL != h0->msg_type)
608  {
609  error0 = DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
610 
611  drop_packet:
613  error0, 1);
614 
616  to_next0 = vlib_frame_vector_args (f0);
617  to_next0[0] = bi0;
618  f0->n_vectors = 1;
620  goto do_trace;
621  }
622  /* hop count seems not need to be checked */
623  if (HOP_COUNT_LIMIT < h0->hop_count)
624  {
626  goto drop_packet;
627  }
628  u0 = (void *) h0 - (sizeof (*u0));
629  ip0 = (void *) u0 - (sizeof (*ip0));
630 
631  vlib_buffer_advance (b0, sizeof (*h0));
632  o = vlib_buffer_get_current (b0);
633 
634  /* Parse through TLVs looking for option 18 (DHCPV6_OPTION_INTERFACE_ID)
635  _and_ option 9 (DHCPV6_OPTION_RELAY_MSG) option which must be there.
636  Currently assuming no other options need to be processed
637  The interface-ID is the FIB number we need
638  to track down the client-facing interface */
639 
640  while ((u8 *) o < (b0->data + b0->current_data + b0->current_length))
641  {
642  if (DHCPV6_OPTION_INTERFACE_ID == clib_net_to_host_u16 (o->option))
643  {
644  interface_opt_flag = 1;
645  if (clib_net_to_host_u16 (o->length) == sizeof (sw_if_index))
646  sw_if_index =
647  clib_net_to_host_u32 (((dhcpv6_int_id_t *) o)->int_idx);
648  if (sw_if_index >= vec_len (im->fib_index_by_sw_if_index))
649  {
650  error0 = DHCPV6_PROXY_ERROR_WRONG_INTERFACE_ID_OPTION;
651  goto drop_packet;
652  }
653  }
654  if (DHCPV6_OPTION_RELAY_MSG == clib_net_to_host_u16 (o->option))
655  {
656  relay_msg_opt_flag = 1;
657  r0 = vlib_buffer_get_current (b0);
658  }
659  if ((relay_msg_opt_flag == 1) && (interface_opt_flag == 1))
660  break;
662  sizeof (*o) +
663  clib_net_to_host_u16 (o->length));
664  o =
665  (dhcpv6_option_t *) (((uword) o) +
666  clib_net_to_host_u16 (o->length) +
667  sizeof (*o));
668  }
669 
670  if ((relay_msg_opt_flag == 0) || (r0 == 0))
671  {
672  error0 = DHCPV6_PROXY_ERROR_NO_RELAY_MESSAGE_OPTION;
673  goto drop_packet;
674  }
675 
676  if ((u32) ~ 0 == sw_if_index)
677  {
678  error0 = DHCPV6_PROXY_ERROR_NO_CIRCUIT_ID_OPTION;
679  goto drop_packet;
680  }
681 
682  //Advance buffer to start of encapsulated DHCPv6 message
683  vlib_buffer_advance (b0, sizeof (*r0));
684 
685  client_fib_idx = im->mfib_index_by_sw_if_index[sw_if_index];
686  proxy = dhcp_get_proxy (dm, client_fib_idx, FIB_PROTOCOL_IP6);
687 
688  if (NULL == proxy)
689  {
690  error0 = DHCPV6_PROXY_ERROR_NO_SERVER;
691  goto drop_packet;
692  }
693 
694  server_fib_idx = im->fib_index_by_sw_if_index
695  [vnet_buffer (b0)->sw_if_index[VLIB_RX]];
696 
697  vec_foreach (server, proxy->dhcp_servers)
698  {
699  if (server_fib_idx == server->server_fib_index &&
700  ip0->src_address.as_u64[0] == server->dhcp_server.ip6.as_u64[0] &&
701  ip0->src_address.as_u64[1] == server->dhcp_server.ip6.as_u64[1])
702  {
703  goto server_found;
704  }
705  }
706 
707  //drop packet if not from server with configured address or FIB
708  error0 = DHCPV6_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS;
709  goto drop_packet;
710 
711  server_found:
712  vnet_buffer (b0)->sw_if_index[VLIB_TX] = original_sw_if_index
713  = sw_if_index;
714 
715  swif = vnet_get_sw_interface (vnm, original_sw_if_index);
717  sw_if_index = swif->unnumbered_sw_if_index;
718 
719 
720  /*
721  * udp_local hands us the DHCPV6 header, need udp hdr,
722  * ip hdr to relay to client
723  */
724  vlib_buffer_advance (b0, -(sizeof (*u1)));
725  u1 = vlib_buffer_get_current (b0);
726 
727  vlib_buffer_advance (b0, -(sizeof (*ip1)));
728  ip1 = vlib_buffer_get_current (b0);
729 
730  copy_ip6_address (&client_address, &h0->peer_addr);
731 
732  ia0 = ip6_interface_first_address (&ip6_main, sw_if_index);
733  if (ia0 == 0)
734  {
735  error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
736  goto drop_packet;
737  }
738 
739  len = clib_net_to_host_u16 (r0->length);
740  clib_memset (ip1, 0, sizeof (*ip1));
741  copy_ip6_address (&ip1->dst_address, &client_address);
742  u1->checksum = 0;
743  u1->src_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_server);
744  u1->dst_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_client);
745  u1->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
746 
748  ip0->ip_version_traffic_class_and_flow_label & 0x00000fff;
749  ip1->payload_length = u1->length;
750  ip1->protocol = PROTO_UDP;
751  ip1->hop_limit = HOP_COUNT_LIMIT;
752  copy_ip6_address (&ip1->src_address, ia0);
753 
754  u1->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip1,
755  &bogus_length);
756  ASSERT (bogus_length == 0);
757 
758  vlib_buffer_advance (b0, -(sizeof (ethernet_header_t)));
759  si0 = vnet_get_sw_interface (vnm, original_sw_if_index);
760  if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
761  vlib_buffer_advance (b0, -4 /* space for VLAN tag */ );
762 
763  mac0 = vlib_buffer_get_current (b0);
764 
765  hi0 = vnet_get_sup_hw_interface (vnm, original_sw_if_index);
766  ei0 = pool_elt_at_index (em->interfaces, hi0->hw_instance);
767  clib_memcpy (mac0->src_address, ei0->address, sizeof (ei0->address));
768  clib_memset (&mac0->dst_address, 0xff, sizeof (mac0->dst_address));
769  mac0->type = (si0->type == VNET_SW_INTERFACE_TYPE_SUB) ?
770  clib_net_to_host_u16 (0x8100) : clib_net_to_host_u16 (0x86dd);
771 
772  if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
773  {
774  u32 *vlan_tag = (u32 *) (mac0 + 1);
775  u32 tmp;
776  tmp = (si0->sub.id << 16) | 0x0800;
777  *vlan_tag = clib_host_to_net_u32 (tmp);
778  }
779 
780  /* $$$ consider adding a dynamic next to the graph node, for performance */
782  to_next0 = vlib_frame_vector_args (f0);
783  to_next0[0] = bi0;
784  f0->n_vectors = 1;
786 
787  do_trace:
788  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
789  {
790  dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
791  b0, sizeof (*tr));
792  tr->which = 1; /* to client */
793  if (ia0)
795  tr->error = error0;
796  tr->original_sw_if_index = original_sw_if_index;
797  tr->sw_if_index = sw_if_index;
798  }
799  }
800  return from_frame->n_vectors;
801 
802 }
803 
804 /* *INDENT-OFF* */
806  .function = dhcpv6_proxy_to_client_input,
807  .name = "dhcpv6-proxy-to-client",
808  /* Takes a vector of packets. */
809  .vector_size = sizeof (u32),
810 
811  .n_errors = DHCPV6_PROXY_N_ERROR,
812  .error_strings = dhcpv6_proxy_error_strings,
814  .format_trace = format_dhcpv6_proxy_trace,
815 #if 0
816  .unformat_buffer = unformat_dhcpv6_proxy_header,
817 #endif
818 };
819 /* *INDENT-ON* */
820 
821 static clib_error_t *
823 {
826 
827  error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
828  dm->error_drop_node_index = error_drop_node->index;
829 
830  /* RFC says this is the dhcpv6 server address */
831  all_dhcpv6_server_address.as_u64[0] =
832  clib_host_to_net_u64 (0xFF05000000000000);
833  all_dhcpv6_server_address.as_u64[1] = clib_host_to_net_u64 (0x00010003);
834 
835  /* RFC says this is the server and agent address */
836  all_dhcpv6_server_relay_agent_address.as_u64[0] =
837  clib_host_to_net_u64 (0xFF02000000000000);
838  all_dhcpv6_server_relay_agent_address.as_u64[1] =
839  clib_host_to_net_u64 (0x00010002);
840 
841  return 0;
842 }
843 
845 
846 int
847 dhcp6_proxy_set_server (ip46_address_t * addr,
848  ip46_address_t * src_addr,
849  u32 rx_table_id, u32 server_table_id, int is_del)
850 {
852  u32 rx_fib_index = 0;
853  int rc = 0;
854 
855  const mfib_prefix_t all_dhcp_servers = {
856  .fp_len = 128,
857  .fp_proto = FIB_PROTOCOL_IP6,
858  .fp_grp_addr = {
860  }
861  };
862 
863  if (ip46_address_is_zero (addr))
864  return VNET_API_ERROR_INVALID_DST_ADDRESS;
865 
866  if (ip46_address_is_zero (src_addr))
867  return VNET_API_ERROR_INVALID_SRC_ADDRESS;
868 
870  rx_table_id,
872 
873  if (is_del)
874  {
875  if (dhcp_proxy_server_del (FIB_PROTOCOL_IP6, rx_fib_index,
876  addr, server_table_id))
877  {
878  mfib_table_entry_delete (rx_fib_index,
879  &all_dhcp_servers, MFIB_SOURCE_DHCP);
880  mfib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP6,
882 
883  udp_unregister_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
884  0 /* is_ip6 */ );
885  udp_unregister_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
886  0 /* is_ip6 */ );
887  }
888  }
889  else
890  {
891  const fib_route_path_t path_for_us = {
893  .frp_addr = zero_addr,
894  .frp_sw_if_index = 0xffffffff,
895  .frp_fib_index = ~0,
896  .frp_weight = 0,
897  .frp_flags = FIB_ROUTE_PATH_LOCAL,
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,
905  &path_for_us, MFIB_ITF_FLAG_FORWARD);
906  /*
907  * Each interface that is enabled in this table, needs to be added
908  * as an accepting interface, but this is not easily doable in VPP.
909  * So we cheat. Add a flag to the entry that indicates accept form
910  * any interface.
911  * We will still only accept on v6 enabled interfaces, since the
912  * input feature ensures this.
913  */
914  mfib_table_entry_update (rx_fib_index,
915  &all_dhcp_servers,
920 
921  udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
923  0 /* is_ip6 */ );
924  udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
926  0 /* is_ip6 */ );
927  }
928  }
929 
931 
932  return (rc);
933 }
934 
935 static clib_error_t *
937  unformat_input_t * input,
938  vlib_cli_command_t * cmd)
939 {
940  ip46_address_t addr, src_addr;
941  int set_server = 0, set_src_address = 0;
942  u32 rx_table_id = 0, server_table_id = 0;
943  int is_del = 0;
944 
946  {
947  if (unformat (input, "server %U", unformat_ip6_address, &addr.ip6))
948  set_server = 1;
949  else if (unformat (input, "src-address %U",
950  unformat_ip6_address, &src_addr.ip6))
951  set_src_address = 1;
952  else if (unformat (input, "server-fib-id %d", &server_table_id))
953  ;
954  else if (unformat (input, "rx-fib-id %d", &rx_table_id))
955  ;
956  else if (unformat (input, "delete") || unformat (input, "del"))
957  is_del = 1;
958  else
959  break;
960  }
961 
962  if (is_del || (set_server && set_src_address))
963  {
964  int rv;
965 
966  rv = dhcp6_proxy_set_server (&addr, &src_addr, rx_table_id,
967  server_table_id, is_del);
968 
969  //TODO: Complete the errors
970  switch (rv)
971  {
972  case 0:
973  return 0;
974 
975  case VNET_API_ERROR_INVALID_DST_ADDRESS:
976  return clib_error_return (0, "Invalid server address");
977 
978  case VNET_API_ERROR_INVALID_SRC_ADDRESS:
979  return clib_error_return (0, "Invalid src address");
980 
981  case VNET_API_ERROR_NO_SUCH_ENTRY:
982  return clib_error_return
983  (0, "Fib id %d: no per-fib DHCP server configured", rx_table_id);
984 
985  default:
986  return clib_error_return (0, "BUG: rv %d", rv);
987  }
988  }
989  else
990  return clib_error_return (0, "parse error`%U'",
991  format_unformat_error, input);
992 }
993 
994 /* *INDENT-OFF* */
995 VLIB_CLI_COMMAND (dhcpv6_proxy_set_command, static) = {
996  .path = "set dhcpv6 proxy",
997  .short_help = "set dhcpv6 proxy [del] server <ipv6-addr> src-address <ipv6-addr> "
998  "[server-fib-id <fib-id>] [rx-fib-id <fib-id>] ",
999  .function = dhcpv6_proxy_set_command_fn,
1000 };
1001 /* *INDENT-ON* */
1002 
1003 static u8 *
1004 format_dhcp6_proxy_server (u8 * s, va_list * args)
1005 {
1006  dhcp_proxy_t *proxy = va_arg (*args, dhcp_proxy_t *);
1007  fib_table_t *server_fib;
1008  dhcp_server_t *server;
1009  ip6_mfib_t *rx_fib;
1010 
1011  if (proxy == 0)
1012  {
1013  s = format (s, "%=14s%=16s%s", "RX FIB", "Src Address",
1014  "Servers FIB,Address");
1015  return s;
1016  }
1017 
1018  rx_fib = ip6_mfib_get (proxy->rx_fib_index);
1019 
1020  s = format (s, "%=14u%=16U",
1021  rx_fib->table_id,
1023 
1024  vec_foreach (server, proxy->dhcp_servers)
1025  {
1026  server_fib = fib_table_get (server->server_fib_index, FIB_PROTOCOL_IP6);
1027  s = format (s, "%u,%U ",
1028  server_fib->ft_table_id,
1030  }
1031 
1032  return s;
1033 }
1034 
1035 static int
1037 {
1038  vlib_main_t *vm = ctx;
1039 
1040  vlib_cli_output (vm, "%U", format_dhcp6_proxy_server, proxy);
1041 
1042  return (1);
1043 }
1044 
1045 static clib_error_t *
1047  unformat_input_t * input,
1048  vlib_cli_command_t * cmd)
1049 {
1051  NULL /* header line */ );
1052 
1054 
1055  return (NULL);
1056 }
1057 
1058 /* *INDENT-OFF* */
1059 VLIB_CLI_COMMAND (dhcpv6_proxy_show_command, static) = {
1060  .path = "show dhcpv6 proxy",
1061  .short_help = "Display dhcpv6 proxy info",
1062  .function = dhcpv6_proxy_show_command_fn,
1063 };
1064 /* *INDENT-ON* */
1065 
1066 static clib_error_t *
1068  unformat_input_t * input, vlib_cli_command_t * cmd)
1069 {
1070  u8 is_del = 0, vss_type = VSS_TYPE_DEFAULT;
1071  u8 *vpn_ascii_id = 0;
1072  u32 oui = 0, fib_id = 0, tbl_id = ~0;
1073 
1074  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1075  {
1076  if (unformat (input, "table %d", &tbl_id))
1077  ;
1078  else if (unformat (input, "oui %d", &oui))
1079  vss_type = VSS_TYPE_VPN_ID;
1080  else if (unformat (input, "vpn-id %d", &fib_id))
1081  vss_type = VSS_TYPE_VPN_ID;
1082  else if (unformat (input, "vpn-ascii-id %s", &vpn_ascii_id))
1083  vss_type = VSS_TYPE_ASCII;
1084  else if (unformat (input, "delete") || unformat (input, "del"))
1085  is_del = 1;
1086  else
1087  break;
1088  }
1089 
1090  if (tbl_id == ~0)
1091  return clib_error_return (0, "no table ID specified.");
1092 
1093  int rv = dhcp_proxy_set_vss (FIB_PROTOCOL_IP6, tbl_id, vss_type,
1094  vpn_ascii_id, oui, fib_id, is_del);
1095  switch (rv)
1096  {
1097  case 0:
1098  return 0;
1099  case VNET_API_ERROR_NO_SUCH_ENTRY:
1100  return clib_error_return (0, "vss for table %d not found in pool.",
1101  tbl_id);
1102  default:
1103  return clib_error_return (0, "BUG: rv %d", rv);
1104  }
1105 }
1106 
1107 /* *INDENT-OFF* */
1108 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_command, static) = {
1109  .path = "set dhcpv6 vss",
1110  .short_help = "set dhcpv6 vss table <table-id> [oui <n> vpn-id <n> | vpn-ascii-id <text>]",
1111  .function = dhcpv6_vss_command_fn,
1112 };
1113 /* *INDENT-ON* */
1114 
1115 static clib_error_t *
1117  unformat_input_t * input,
1118  vlib_cli_command_t * cmd)
1119 {
1121 
1122  return (NULL);
1123 }
1124 
1125 /* *INDENT-OFF* */
1126 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_show_command, static) = {
1127  .path = "show dhcpv6 vss",
1128  .short_help = "show dhcpv6 VSS",
1129  .function = dhcpv6_vss_show_command_fn,
1130 };
1131 /* *INDENT-ON* */
1132 
1133 static clib_error_t *
1135  unformat_input_t * input,
1136  vlib_cli_command_t * cmd)
1137 {
1138  vnet_main_t *vnm = vnet_get_main ();
1139  u32 sw_if_index0 = 0, sw_if_index;
1140  vnet_sw_interface_t *swif;
1141  ip6_address_t *ia0;
1142 
1143  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1144  {
1145 
1146  if (unformat (input, "%U",
1147  unformat_vnet_sw_interface, vnm, &sw_if_index0))
1148  {
1149  swif = vnet_get_sw_interface (vnm, sw_if_index0);
1151  swif->unnumbered_sw_if_index : sw_if_index0;
1153  if (ia0)
1154  {
1155  vlib_cli_output (vm, "%=20s%=48s", "interface", "link-address");
1156 
1157  vlib_cli_output (vm, "%=20U%=48U",
1159  sw_if_index0, format_ip6_address, ia0);
1160  }
1161  else
1162  vlib_cli_output (vm, "%=34s%=20U",
1163  "No IPv6 address configured on",
1165  }
1166  else
1167  break;
1168  }
1169 
1170  return 0;
1171 }
1172 
1173 /* *INDENT-OFF* */
1174 VLIB_CLI_COMMAND (dhcpv6_proxy_address_show_command, static) = {
1175  .path = "show dhcpv6 link-address interface",
1176  .short_help = "show dhcpv6 link-address interface <interface>",
1178 };
1179 /* *INDENT-ON* */
1180 
1181 /*
1182  * fd.io coding-style-patch-verification: ON
1183  *
1184  * Local Variables:
1185  * eval: (c-set-style "gnu")
1186  * End:
1187  */
#define foreach_ip_interface_address(lm, a, sw_if_index, loop, body)
Definition: lookup.h:182
u32 sw_if_index
Definition: ipsec_gre.api:37
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:440
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:562
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:470
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:47
static vnet_hw_interface_t * vnet_get_sup_hw_interface(vnet_main_t *vnm, u32 sw_if_index)
void dhcp_vss_walk(fib_protocol_t proto, dhcp_vss_walk_fn_t fn, void *ctx)
Walk/Visit each DHCP proxy VSS.
Definition: dhcp_proxy.c:87
dhcp_server_t * dhcp_servers
The set of DHCP servers to which messages are relayed.
Definition: dhcp_proxy.h:111
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
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:475
unformat_function_t unformat_vnet_sw_interface
vl_api_ip4_address_t dst
Definition: ipsec_gre.api:39
vlib_node_registration_t error_drop_node
(constructor) VLIB_REGISTER_NODE (error_drop_node)
Definition: drop.c:257
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:121
ip6_address_t src_address
Definition: ip6_packet.h:385
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:959
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
#define MFIB_RPF_ID_NONE
Definition: fib_types.h:393
dhcpv6_proxy_to_server_input_next_t
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:163
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:189
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
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, mfib_itf_flags_t itf_flags)
Add n paths to an entry (aka route) in the FIB.
Definition: mfib_table.c:290
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:704
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:653
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:198
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:684
#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:682
vl_api_ip4_address_t src
Definition: ipsec_gre.api:38
#define vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, n_left_to_next, bi0, next0)
Finish enqueueing one buffer forward in the graph.
Definition: buffer_node.h:218
#define vlib_get_next_frame(vm, node, next_index, vectors, n_vectors_left)
Get pointer to next frame vector data by (vlib_node_runtime_t, next_index).
Definition: node_funcs.h:368
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:1180
u8 len
Definition: ip_types.api:49
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
static void vlib_buffer_copy_trace_flag(vlib_main_t *vm, vlib_buffer_t *b, u32 bi_target)
Definition: trace_funcs.h:147
#define UNFORMAT_END_OF_INPUT
Definition: format.h:144
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:522
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:465
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:947
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:514
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:2688
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:57
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:372
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:376
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:451
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:274
#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:369
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
vnet_sw_interface_type_t type
Definition: interface.h:682
#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:484
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:762
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:972
Definition: defs.h:46
ip6_address_t dst_address
Definition: ip6_packet.h:385
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:170
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)