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                       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)
 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* */
 533 VLIB_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
 557 static uword
 558 dhcpv6_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* */
 805 VLIB_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
 821 static clib_error_t *
 822 dhcp6_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
 844 VLIB_INIT_FUNCTION (dhcp6_proxy_init);
 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 {
 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
 935 static clib_error_t *
 936 dhcpv6_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* */
 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,
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
1035 static int
1036 dhcp6_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
1045 static clib_error_t *
1046 dhcpv6_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* */
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 *
1067 dhcpv6_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* */
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 *
1116 dhcpv6_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* */
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 *
1134 dhcpv6_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* */
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>",
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  */