dhcp6_proxy_node.c revision 60ad1a59
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 <dhcp/dhcp_proxy.h>
21#include <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
26static char *dhcpv6_proxy_error_strings[] = {
27#define dhcpv6_proxy_error(n,s) s,
28#include <dhcp/dhcp6_proxy_error.def>
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
38typedef enum
39{
40#define _(s,n) DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s,
41  foreach_dhcpv6_proxy_to_server_input_next
42#undef _
43    DHCPV6_PROXY_TO_SERVER_INPUT_N_NEXT,
44} dhcpv6_proxy_to_server_input_next_t;
45
46typedef struct
47{
48  /* 0 => to server, 1 => to client */
49  int which;
50  u8 packet_data[64];
51  u32 error;
52  u32 sw_if_index;
53  u32 original_sw_if_index;
54} dhcpv6_proxy_trace_t;
55
56static vlib_node_registration_t dhcpv6_proxy_to_server_node;
57static vlib_node_registration_t dhcpv6_proxy_to_client_node;
58
59/* all DHCP servers address */
60static ip6_address_t all_dhcpv6_server_address;
61static ip6_address_t all_dhcpv6_server_relay_agent_address;
62
63static u8 *
64format_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",
72		format_ip6_address, &t->packet_data, sizeof (ip6_address_t));
73  else
74    s = format (s, "DHCPV6 proxy: sent to client from %U",
75		format_ip6_address, &t->packet_data, sizeof (ip6_address_t));
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",
80	      t->original_sw_if_index, t->sw_if_index);
81
82  return s;
83}
84
85static u8 *
86format_dhcpv6_proxy_header_with_length (u8 * s, va_list * args)
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 */
102static ip6_address_t *
103ip6_interface_first_global_or_site_address (ip6_main_t * im, u32 sw_if_index)
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  ({
113    ip6_address_t * a = ip_interface_address_get_address (lm, ia);
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
124static inline void
125copy_ip6_address (ip6_address_t * dst, ip6_address_t * src)
126{
127  dst->as_u64[0] = src->as_u64[0];
128  dst->as_u64[1] = src->as_u64[1];
129}
130
131static uword
132dhcpv6_proxy_to_server_input (vlib_main_t * vm,
133			      vlib_node_runtime_t * node,
134			      vlib_frame_t * from_frame)
135{
136  u32 n_left_from, next_index, *from, *to_next;
137  dhcp_proxy_main_t *dpm = &dhcp_proxy_main;
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;
146  ip6_address_t *src;
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:
211	    case DHCPV6_MSG_INFORMATION_REQUEST:
212	    case DHCPV6_MSG_RELAY_FORW:
213	      /* send to server */
214	      break;
215	    case DHCPV6_MSG_RELAY_REPL:
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	    {
276	      error0 = DHCPV6_RELAY_PKT_DROP_MAX_HOPS;
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);
300	  if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
301	    sw_if_index = swif->unnumbered_sw_if_index;
302
303	  ia0 =
304	    ip6_interface_first_global_or_site_address (&ip6_main,
305							sw_if_index);
306	  if (ia0 == 0)
307	    {
308	      error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
309	      next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
310	      pkts_no_interface_address++;
311	      goto do_trace;
312	    }
313
314	  copy_ip6_address (&r1->link_addr, ia0);
315
316	link_address_set:
317
318	  if ((b0->current_data + b0->current_length + sizeof (*id1) +
319	       sizeof (*vss1) + sizeof (*cmac)) >
320	      vlib_buffer_get_default_data_size (vm))
321	    {
322	      error0 = DHCPV6_PROXY_ERROR_PKT_TOO_BIG;
323	      next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
324	      pkts_too_big++;
325	      goto do_trace;
326	    }
327
328	  id1 = (dhcpv6_int_id_t *) (((uword) ip1) + b0->current_length);
329	  b0->current_length += (sizeof (*id1));
330
331	  id1->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_INTERFACE_ID);
332	  id1->opt.length = clib_host_to_net_u16 (sizeof (rx_sw_if_index));
333	  id1->int_idx = clib_host_to_net_u32 (rx_sw_if_index);
334
335	  u1->length = 0;
336	  if (h0->msg_type != DHCPV6_MSG_RELAY_FORW)
337	    {
338	      cmac =
339		(dhcpv6_client_mac_t *) (((uword) ip1) + b0->current_length);
340	      b0->current_length += (sizeof (*cmac));
341	      cmac->opt.length = clib_host_to_net_u16 (sizeof (*cmac) -
342						       sizeof (cmac->opt));
343	      cmac->opt.option =
344		clib_host_to_net_u16
345		(DHCPV6_OPTION_CLIENT_LINK_LAYER_ADDRESS);
346	      cmac->link_type = clib_host_to_net_u16 (1);	/* ethernet */
347	      clib_memcpy (cmac->data, client_src_mac, 6);
348	      u1->length += sizeof (*cmac);
349	    }
350
351	  vss = dhcp_get_vss_info (dpm, rx_fib_idx, FIB_PROTOCOL_IP6);
352
353	  if (vss)
354	    {
355	      u16 id_len;	/* length of VPN ID */
356	      u16 type_len = sizeof (vss1->vss_type);
357
358	      vss1 = (dhcpv6_vss_t *) (((uword) ip1) + b0->current_length);
359	      vss1->vss_type = vss->vss_type;
360	      if (vss->vss_type == VSS_TYPE_VPN_ID)
361		{
362		  id_len = sizeof (vss->vpn_id);	/* vpn_id is 7 bytes */
363		  memcpy (vss1->data, vss->vpn_id, id_len);
364		}
365	      else if (vss->vss_type == VSS_TYPE_ASCII)
366		{
367		  id_len = vec_len (vss->vpn_ascii_id);
368		  memcpy (vss1->data, vss->vpn_ascii_id, id_len);
369		}
370	      else		/* must be VSS_TYPE_DEFAULT, no VPN ID */
371		id_len = 0;
372
373	      vss1->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_VSS);
374	      vss1->opt.length = clib_host_to_net_u16 (type_len + id_len);
375	      u1->length += type_len + id_len + sizeof (vss1->opt);
376	      b0->current_length += type_len + id_len + sizeof (vss1->opt);
377	    }
378
379	  pkts_to_server++;
380	  u1->checksum = 0;
381	  u1->src_port = clib_host_to_net_u16 (UDP_DST_PORT_dhcpv6_to_client);
382	  u1->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_dhcpv6_to_server);
383
384	  u1->length =
385	    clib_host_to_net_u16 (clib_net_to_host_u16 (fwd_opt->length) +
386				  sizeof (*r1) + sizeof (*fwd_opt) +
387				  sizeof (*u1) + sizeof (*id1) + u1->length);
388
389	  clib_memset (ip1, 0, sizeof (*ip1));
390	  ip1->ip_version_traffic_class_and_flow_label = 0x60;
391	  ip1->payload_length = u1->length;
392	  ip1->protocol = PROTO_UDP;
393	  ip1->hop_limit = HOP_COUNT_LIMIT;
394	  src = ((server->dhcp_server.ip6.as_u64[0] ||
395		  server->dhcp_server.ip6.as_u64[1]) ?
396		 &server->dhcp_server.ip6 : &all_dhcpv6_server_address);
397	  copy_ip6_address (&ip1->dst_address, src);
398
399
400	  ia0 = ip6_interface_first_global_or_site_address
401	    (&ip6_main, vnet_buffer (b0)->sw_if_index[VLIB_RX]);
402
403	  src = (proxy->dhcp_src_address.ip6.as_u64[0] ||
404		 proxy->dhcp_src_address.ip6.as_u64[1]) ?
405	    &proxy->dhcp_src_address.ip6 : ia0;
406	  if (ia0 == 0)
407	    {
408	      error0 = DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS;
409	      next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
410	      pkts_no_src_address++;
411	      goto do_trace;
412	    }
413
414	  copy_ip6_address (&ip1->src_address, src);
415
416
417	  u1->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip1,
418							    &bogus_length);
419	  ASSERT (bogus_length == 0);
420
421	  next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP;
422
423	  is_solicit = (DHCPV6_MSG_SOLICIT == h0->msg_type);
424
425	  /*
426	   * If we have multiple servers configured and this is the
427	   * client's discover message, then send copies to each of
428	   * those servers
429	   */
430	  if (is_solicit && vec_len (proxy->dhcp_servers) > 1)
431	    {
432	      u32 ii;
433
434	      for (ii = 1; ii < vec_len (proxy->dhcp_servers); ii++)
435		{
436		  vlib_buffer_t *c0;
437		  u32 ci0;
438
439		  c0 = vlib_buffer_copy (vm, b0);
440		  VLIB_BUFFER_TRACE_TRAJECTORY_INIT (c0);
441		  ci0 = vlib_get_buffer_index (vm, c0);
442		  server = &proxy->dhcp_servers[ii];
443
444		  ip0 = vlib_buffer_get_current (c0);
445
446		  src = ((server->dhcp_server.ip6.as_u64[0] ||
447			  server->dhcp_server.ip6.as_u64[1]) ?
448			 &server->dhcp_server.ip6 :
449			 &all_dhcpv6_server_address);
450		  copy_ip6_address (&ip1->dst_address, src);
451
452		  to_next[0] = ci0;
453		  to_next += 1;
454		  n_left_to_next -= 1;
455
456		  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
457						   to_next, n_left_to_next,
458						   ci0, next0);
459
460		  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
461		    {
462		      dhcpv6_proxy_trace_t *tr;
463
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)
470			copy_ip6_address ((ip6_address_t *) &
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)
495		copy_ip6_address ((ip6_address_t *) & tr->packet_data[0],
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
512  vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
513			       DHCPV6_PROXY_ERROR_RELAY_TO_CLIENT,
514			       pkts_to_client);
515  vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
516			       DHCPV6_PROXY_ERROR_RELAY_TO_SERVER,
517			       pkts_to_server);
518  vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
519			       DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS,
520			       pkts_no_interface_address);
521  vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
522			       DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE,
523			       pkts_wrong_msg_type);
524  vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
525			       DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS,
526			       pkts_no_src_address);
527  vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
528			       DHCPV6_PROXY_ERROR_PKT_TOO_BIG, pkts_too_big);
529  return from_frame->n_vectors;
530}
531
532/* *INDENT-OFF* */
533VLIB_REGISTER_NODE (dhcpv6_proxy_to_server_node, static) = {
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,
545    foreach_dhcpv6_proxy_to_server_input_next
546#undef _
547  },
548
549  .format_buffer = format_dhcpv6_proxy_header_with_length,
550  .format_trace = format_dhcpv6_proxy_trace,
551#if 0
552  .unformat_buffer = unformat_dhcpv6_proxy_header,
553#endif
554};
555/* *INDENT-ON* */
556
557static uword
558dhcpv6_proxy_to_client_input (vlib_main_t * vm,
559			      vlib_node_runtime_t * node,
560			      vlib_frame_t * from_frame)
561{
562
563  u32 n_left_from, *from;
564  ethernet_main_t *em = vnet_get_ethernet_main ();
565  dhcp_proxy_main_t *dm = &dhcp_proxy_main;
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;
583      ethernet_interface_t *ei0;
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:
612	  vlib_node_increment_counter (vm, dhcpv6_proxy_to_client_node.index,
613				       error0, 1);
614
615	  f0 = vlib_get_frame_to_node (vm, dm->error_drop_node_index);
616	  to_next0 = vlib_frame_vector_args (f0);
617	  to_next0[0] = bi0;
618	  f0->n_vectors = 1;
619	  vlib_put_frame_to_node (vm, dm->error_drop_node_index, f0);
620	  goto do_trace;
621	}
622      /* hop count seems not need to be checked */
623      if (HOP_COUNT_LIMIT < h0->hop_count)
624	{
625	  error0 = DHCPV6_RELAY_PKT_DROP_MAX_HOPS;
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;
661	  vlib_buffer_advance (b0,
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);
716      if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
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
747      ip1->ip_version_traffic_class_and_flow_label =
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 */
781      f0 = vlib_get_frame_to_node (vm, hi0->output_node_index);
782      to_next0 = vlib_frame_vector_args (f0);
783      to_next0[0] = bi0;
784      f0->n_vectors = 1;
785      vlib_put_frame_to_node (vm, hi0->output_node_index, f0);
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)
794	    copy_ip6_address ((ip6_address_t *) tr->packet_data, 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* */
805VLIB_REGISTER_NODE (dhcpv6_proxy_to_client_node, static) = {
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,
813  .format_buffer = format_dhcpv6_proxy_header_with_length,
814  .format_trace = format_dhcpv6_proxy_trace,
815#if 0
816  .unformat_buffer = unformat_dhcpv6_proxy_header,
817#endif
818};
819/* *INDENT-ON* */
820
821static clib_error_t *
822dhcp6_proxy_init (vlib_main_t * vm)
823{
824  dhcp_proxy_main_t *dm = &dhcp_proxy_main;
825  vlib_node_t *error_drop_node;
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
844VLIB_INIT_FUNCTION (dhcp6_proxy_init);
845
846int
847dhcp6_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{
851  vlib_main_t *vm = vlib_get_main ();
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 = {
859		    .ip6 = all_dhcpv6_server_relay_agent_address,
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
869  rx_fib_index = mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
870						     rx_table_id,
871						     MFIB_SOURCE_DHCP);
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,
881			     MFIB_SOURCE_DHCP);
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 = {
892	.frp_proto = DPO_PROTO_IP6,
893	.frp_addr = zero_addr,
894	.frp_sw_if_index = 0xffffffff,
895	.frp_fib_index = ~0,
896	.frp_weight = 1,
897	.frp_flags = FIB_ROUTE_PATH_LOCAL,
898	.frp_mitf_flags = MFIB_ITF_FLAG_FORWARD,
899      };
900      if (dhcp_proxy_server_add (FIB_PROTOCOL_IP6, addr, src_addr,
901				 rx_fib_index, server_table_id))
902	{
903	  mfib_table_entry_path_update (rx_fib_index,
904					&all_dhcp_servers,
905					MFIB_SOURCE_DHCP, &path_for_us);
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,
916				   MFIB_SOURCE_DHCP,
917				   MFIB_RPF_ID_NONE,
918				   MFIB_ENTRY_FLAG_ACCEPT_ALL_ITF);
919	  mfib_table_lock (rx_fib_index, FIB_PROTOCOL_IP6, MFIB_SOURCE_DHCP);
920
921	  udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
922				 dhcpv6_proxy_to_client_node.index,
923				 0 /* is_ip6 */ );
924	  udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
925				 dhcpv6_proxy_to_server_node.index,
926				 0 /* is_ip6 */ );
927	}
928    }
929
930  mfib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP6, MFIB_SOURCE_DHCP);
931
932  return (rc);
933}
934
935static clib_error_t *
936dhcpv6_proxy_set_command_fn (vlib_main_t * vm,
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
945  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
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* */
995VLIB_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
1003static u8 *
1004format_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,
1022	      format_ip46_address, &proxy->dhcp_src_address, IP46_TYPE_ANY);
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,
1029		format_ip46_address, &server->dhcp_server, IP46_TYPE_ANY);
1030  }
1031
1032  return s;
1033}
1034
1035static int
1036dhcp6_proxy_show_walk (dhcp_proxy_t * proxy, void *ctx)
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
1045static clib_error_t *
1046dhcpv6_proxy_show_command_fn (vlib_main_t * vm,
1047			      unformat_input_t * input,
1048			      vlib_cli_command_t * cmd)
1049{
1050  vlib_cli_output (vm, "%U", format_dhcp6_proxy_server,
1051		   NULL /* header line */ );
1052
1053  dhcp_proxy_walk (FIB_PROTOCOL_IP6, dhcp6_proxy_show_walk, vm);
1054
1055  return (NULL);
1056}
1057
1058/* *INDENT-OFF* */
1059VLIB_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
1066static clib_error_t *
1067dhcpv6_vss_command_fn (vlib_main_t * vm,
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* */
1108VLIB_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
1115static clib_error_t *
1116dhcpv6_vss_show_command_fn (vlib_main_t * vm,
1117			    unformat_input_t * input,
1118			    vlib_cli_command_t * cmd)
1119{
1120  dhcp_vss_walk (FIB_PROTOCOL_IP6, dhcp_vss_show_walk, vm);
1121
1122  return (NULL);
1123}
1124
1125/* *INDENT-OFF* */
1126VLIB_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
1133static clib_error_t *
1134dhcpv6_link_address_show_command_fn (vlib_main_t * vm,
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);
1150	  sw_if_index = (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) ?
1151	    swif->unnumbered_sw_if_index : sw_if_index0;
1152	  ia0 = ip6_interface_first_address (&ip6_main, sw_if_index);
1153	  if (ia0)
1154	    {
1155	      vlib_cli_output (vm, "%=20s%=48s", "interface", "link-address");
1156
1157	      vlib_cli_output (vm, "%=20U%=48U",
1158			       format_vnet_sw_if_index_name, vnm,
1159			       sw_if_index0, format_ip6_address, ia0);
1160	    }
1161	  else
1162	    vlib_cli_output (vm, "%=34s%=20U",
1163			     "No IPv6 address configured on",
1164			     format_vnet_sw_if_index_name, vnm, sw_if_index);
1165	}
1166      else
1167	break;
1168    }
1169
1170  return 0;
1171}
1172
1173/* *INDENT-OFF* */
1174VLIB_CLI_COMMAND (dhcpv6_proxy_address_show_command, static) = {
1175  .path = "show dhcpv6 link-address interface",
1176  .short_help = "show dhcpv6 link-address interface <interface>",
1177  .function = dhcpv6_link_address_show_command_fn,
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 */
1188