src/vnet/dhcp/dhcp6_proxy_node.c

   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,
  28 #include <vnet/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
  38 typedef 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
  46 typedef 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
  56 static vlib_node_registration_t dhcpv6_proxy_to_server_node;
  57 static vlib_node_registration_t dhcpv6_proxy_to_client_node;
  58
  59 /* all DHCP servers address */
  60 static ip6_address_t all_dhcpv6_server_address;
  61 static ip6_address_t all_dhcpv6_server_relay_agent_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",
  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
  85 static u8 *
  86 format_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 */
 102 static ip6_address_t *
 103 ip6_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
 124 static inline void
 125 copy_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
 131 static uword
 132 dhcpv6_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_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
 399           ia0 = ip6_interface_first_global_or_site_address
 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);
 439                   VLIB_BUFFER_TRACE_TRAJECTORY_INIT (c0);
 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                     {
 461                       dhcpv6_proxy_trace_t *tr;
 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)
 469                         copy_ip6_address ((ip6_address_t *) &
 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)
 494                 copy_ip6_address ((ip6_address_t *) & tr->packet_data[0],
 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
 511   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 512                                DHCPV6_PROXY_ERROR_RELAY_TO_CLIENT,
 513                                pkts_to_client);
 514   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 515                                DHCPV6_PROXY_ERROR_RELAY_TO_SERVER,
 516                                pkts_to_server);
 517   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 518                                DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS,
 519                                pkts_no_interface_address);
 520   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 521                                DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE,
 522                                pkts_wrong_msg_type);
 523   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 524                                DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS,
 525                                pkts_no_src_address);
 526   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 527                                DHCPV6_PROXY_ERROR_PKT_TOO_BIG, pkts_too_big);
 528   return from_frame->n_vectors;
 529 }
 530
 531 /* *INDENT-OFF* */
 532 VLIB_REGISTER_NODE (dhcpv6_proxy_to_server_node, static) = {
 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,
 544     foreach_dhcpv6_proxy_to_server_input_next
 545 #undef _
 546   },
 547
 548   .format_buffer = format_dhcpv6_proxy_header_with_length,
 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
 557 dhcpv6_proxy_to_client_input (vlib_main_t * vm,
 558                               vlib_node_runtime_t * node,
 559                               vlib_frame_t * from_frame)
 560 {
 561
 562   u32 n_left_from, *from;
 563   ethernet_main_t *em = vnet_get_ethernet_main ();
 564   dhcp_proxy_main_t *dm = &dhcp_proxy_main;
 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;
 582       ethernet_interface_t *ei0;
 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:
 611           vlib_node_increment_counter (vm, dhcpv6_proxy_to_client_node.index,
 612                                        error0, 1);
 613
 614           f0 = vlib_get_frame_to_node (vm, dm->error_drop_node_index);
 615           to_next0 = vlib_frame_vector_args (f0);
 616           to_next0[0] = bi0;
 617           f0->n_vectors = 1;
 618           vlib_put_frame_to_node (vm, dm->error_drop_node_index, f0);
 619           goto do_trace;
 620         }
 621       /* hop count seems not need to be checked */
 622       if (HOP_COUNT_LIMIT < h0->hop_count)
 623         {
 624           error0 = DHCPV6_RELAY_PKT_DROP_MAX_HOPS;
 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;
 660           vlib_buffer_advance (b0,
 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);
 715       if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
 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
 746       ip1->ip_version_traffic_class_and_flow_label =
 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 */
 780       f0 = vlib_get_frame_to_node (vm, hi0->output_node_index);
 781       to_next0 = vlib_frame_vector_args (f0);
 782       to_next0[0] = bi0;
 783       f0->n_vectors = 1;
 784       vlib_put_frame_to_node (vm, hi0->output_node_index, f0);
 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)
 793             copy_ip6_address ((ip6_address_t *) tr->packet_data, 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* */
 804 VLIB_REGISTER_NODE (dhcpv6_proxy_to_client_node, static) = {
 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,
 812   .format_buffer = format_dhcpv6_proxy_header_with_length,
 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 *
 821 dhcp6_proxy_init (vlib_main_t * vm)
 822 {
 823   dhcp_proxy_main_t *dm = &dhcp_proxy_main;
 824   vlib_node_t *error_drop_node;
 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
 843 VLIB_INIT_FUNCTION (dhcp6_proxy_init);
 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 {
 850   vlib_main_t *vm = vlib_get_main ();
 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 = {
 858                     .ip6 = all_dhcpv6_server_relay_agent_address,
 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
 868   rx_fib_index = mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
 869                                                      rx_table_id,
 870                                                      MFIB_SOURCE_DHCP);
 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,
 880                              MFIB_SOURCE_DHCP);
 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 = {
 891         .frp_proto = DPO_PROTO_IP6,
 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,
 915                                    MFIB_SOURCE_DHCP,
 916                                    MFIB_RPF_ID_NONE,
 917                                    MFIB_ENTRY_FLAG_ACCEPT_ALL_ITF);
 918           mfib_table_lock (rx_fib_index, FIB_PROTOCOL_IP6, MFIB_SOURCE_DHCP);
 919
 920           udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
 921                                  dhcpv6_proxy_to_client_node.index,
 922                                  0 /* is_ip6 */ );
 923           udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
 924                                  dhcpv6_proxy_to_server_node.index,
 925                                  0 /* is_ip6 */ );
 926         }
 927     }
 928
 929   mfib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP6, MFIB_SOURCE_DHCP);
 930
 931   return (rc);
 932 }
 933
 934 static clib_error_t *
 935 dhcpv6_proxy_set_command_fn (vlib_main_t * vm,
 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
 944   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 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,
1021               format_ip46_address, &proxy->dhcp_src_address, IP46_TYPE_ANY);
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,
1028                 format_ip46_address, &server->dhcp_server, IP46_TYPE_ANY);
1029   }
1030
1031   return s;
1032 }
1033
1034 static int
1035 dhcp6_proxy_show_walk (dhcp_proxy_t * proxy, void *ctx)
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 *
1045 dhcpv6_proxy_show_command_fn (vlib_main_t * vm,
1046                               unformat_input_t * input,
1047                               vlib_cli_command_t * cmd)
1048 {
1049   vlib_cli_output (vm, "%U", format_dhcp6_proxy_server,
1050                    NULL /* header line */ );
1051
1052   dhcp_proxy_walk (FIB_PROTOCOL_IP6, dhcp6_proxy_show_walk, vm);
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 *
1066 dhcpv6_vss_command_fn (vlib_main_t * vm,
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 *
1115 dhcpv6_vss_show_command_fn (vlib_main_t * vm,
1116                             unformat_input_t * input,
1117                             vlib_cli_command_t * cmd)
1118 {
1119   dhcp_vss_walk (FIB_PROTOCOL_IP6, dhcp_vss_show_walk, vm);
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 *
1133 dhcpv6_link_address_show_command_fn (vlib_main_t * vm,
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);
1149           sw_if_index = (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) ?
1150             swif->unnumbered_sw_if_index : sw_if_index0;
1151           ia0 = ip6_interface_first_address (&ip6_main, sw_if_index);
1152           if (ia0)
1153             {
1154               vlib_cli_output (vm, "%=20s%=48s", "interface", "link-address");
1155
1156               vlib_cli_output (vm, "%=20U%=48U",
1157                                format_vnet_sw_if_index_name, vnm,
1158                                sw_if_index0, format_ip6_address, ia0);
1159             }
1160           else
1161             vlib_cli_output (vm, "%=34s%=20U",
1162                              "No IPv6 address configured on",
1163                              format_vnet_sw_if_index_name, vnm, sw_if_index);
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>",
1176   .function = dhcpv6_link_address_show_command_fn,
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  */