src/plugins/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 <dhcp/dhcp_proxy.h>
  20 #include <dhcp/dhcp6_packet.h>
  21 #include <vnet/mfib/mfib_table.h>
  22 #include <vnet/mfib/ip6_mfib.h>
  23 #include <vnet/fib/fib.h>
  24
  25 static char *dhcpv6_proxy_error_strings[] = {
  26 #define dhcpv6_proxy_error(n,s) s,
  27 #include <dhcp/dhcp6_proxy_error.def>
  28 #undef dhcpv6_proxy_error
  29 };
  30
  31 #define foreach_dhcpv6_proxy_to_server_input_next \
  32   _ (DROP, "error-drop")                        \
  33   _ (LOOKUP, "ip6-lookup")                      \
  34   _ (SEND_TO_CLIENT, "dhcpv6-proxy-to-client")
  35
  36
  37 typedef enum
  38 {
  39 #define _(s,n) DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s,
  40   foreach_dhcpv6_proxy_to_server_input_next
  41 #undef _
  42     DHCPV6_PROXY_TO_SERVER_INPUT_N_NEXT,
  43 } dhcpv6_proxy_to_server_input_next_t;
  44
  45 typedef struct
  46 {
  47   /* 0 => to server, 1 => to client */
  48   int which;
  49   u8 packet_data[64];
  50   u32 error;
  51   u32 sw_if_index;
  52   u32 original_sw_if_index;
  53 } dhcpv6_proxy_trace_t;
  54
  55 static vlib_node_registration_t dhcpv6_proxy_to_server_node;
  56 static vlib_node_registration_t dhcpv6_proxy_to_client_node;
  57
  58 /* all DHCP servers address */
  59 static ip6_address_t all_dhcpv6_server_address;
  60 static ip6_address_t all_dhcpv6_server_relay_agent_address;
  61
  62 static u8 *
  63 format_dhcpv6_proxy_trace (u8 * s, va_list * args)
  64 {
  65   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  66   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  67   dhcpv6_proxy_trace_t *t = va_arg (*args, dhcpv6_proxy_trace_t *);
  68
  69   if (t->which == 0)
  70     s = format (s, "DHCPV6 proxy: sent to server %U",
  71                 format_ip6_address, &t->packet_data, sizeof (ip6_address_t));
  72   else
  73     s = format (s, "DHCPV6 proxy: sent to client from %U",
  74                 format_ip6_address, &t->packet_data, sizeof (ip6_address_t));
  75   if (t->error != (u32) ~ 0)
  76     s = format (s, " error: %s\n", dhcpv6_proxy_error_strings[t->error]);
  77
  78   s = format (s, "  original_sw_if_index: %d, sw_if_index: %d\n",
  79               t->original_sw_if_index, t->sw_if_index);
  80
  81   return s;
  82 }
  83
  84 static u8 *
  85 format_dhcpv6_proxy_header_with_length (u8 * s, va_list * args)
  86 {
  87   dhcpv6_header_t *h = va_arg (*args, dhcpv6_header_t *);
  88   u32 max_header_bytes = va_arg (*args, u32);
  89   u32 header_bytes;
  90
  91   header_bytes = sizeof (h[0]);
  92   if (max_header_bytes != 0 && header_bytes > max_header_bytes)
  93     return format (s, "dhcpv6 header truncated");
  94
  95   s = format (s, "DHCPV6 Proxy");
  96
  97   return s;
  98 }
  99
 100 /* get first interface address */
 101 static ip6_address_t *
 102 ip6_interface_first_global_or_site_address (ip6_main_t * im, u32 sw_if_index)
 103 {
 104   ip_lookup_main_t *lm = &im->lookup_main;
 105   ip_interface_address_t *ia = 0;
 106   ip6_address_t *result = 0;
 107
 108   /* *INDENT-OFF* */
 109   foreach_ip_interface_address (lm, ia, sw_if_index,
 110                                 1 /* honor unnumbered */,
 111   ({
 112     ip6_address_t * a = ip_interface_address_get_address (lm, ia);
 113     if ((a->as_u8[0] & 0xe0) == 0x20 ||
 114         (a->as_u8[0] & 0xfe) == 0xfc)  {
 115         result = a;
 116         break;
 117     }
 118   }));
 119   /* *INDENT-ON* */
 120   return result;
 121 }
 122
 123 static inline void
 124 copy_ip6_address (ip6_address_t * dst, ip6_address_t * src)
 125 {
 126   dst->as_u64[0] = src->as_u64[0];
 127   dst->as_u64[1] = src->as_u64[1];
 128 }
 129
 130 static uword
 131 dhcpv6_proxy_to_server_input (vlib_main_t * vm,
 132                               vlib_node_runtime_t * node,
 133                               vlib_frame_t * from_frame)
 134 {
 135   u32 n_left_from, next_index, *from, *to_next;
 136   dhcp_proxy_main_t *dpm = &dhcp_proxy_main;
 137   from = vlib_frame_vector_args (from_frame);
 138   n_left_from = from_frame->n_vectors;
 139   u32 pkts_to_server = 0, pkts_to_client = 0;
 140   u32 pkts_no_interface_address = 0;
 141   u32 pkts_no_src_address = 0;
 142   u32 pkts_wrong_msg_type = 0;
 143   u32 pkts_too_big = 0;
 144   ip6_main_t *im = &ip6_main;
 145   ip6_address_t *src;
 146   int bogus_length;
 147   dhcp_proxy_t *proxy;
 148   dhcp_server_t *server;
 149   u32 rx_fib_idx = 0, server_fib_idx = 0;
 150
 151   next_index = node->cached_next_index;
 152
 153   while (n_left_from > 0)
 154     {
 155       u32 n_left_to_next;
 156
 157       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 158
 159       while (n_left_from > 0 && n_left_to_next > 0)
 160         {
 161           vnet_main_t *vnm = vnet_get_main ();
 162           u32 sw_if_index = 0;
 163           u32 rx_sw_if_index = 0;
 164           vnet_sw_interface_t *swif;
 165           u32 bi0;
 166           vlib_buffer_t *b0;
 167           udp_header_t *u0, *u1;
 168           dhcpv6_header_t *h0;  // client msg hdr
 169           ip6_header_t *ip0, *ip1;
 170           ip6_address_t _ia0, *ia0 = &_ia0;
 171           u32 next0;
 172           u32 error0 = (u32) ~ 0;
 173           dhcpv6_option_t *fwd_opt;
 174           dhcpv6_relay_hdr_t *r1;
 175           u16 len;
 176           dhcpv6_int_id_t *id1;
 177           dhcpv6_vss_t *vss1;
 178           dhcpv6_client_mac_t *cmac;    // client mac
 179           ethernet_header_t *e_h0;
 180           u8 client_src_mac[6];
 181           dhcp_vss_t *vss;
 182           u8 is_solicit = 0;
 183
 184           bi0 = from[0];
 185           from += 1;
 186           n_left_from -= 1;
 187
 188           b0 = vlib_get_buffer (vm, bi0);
 189
 190           h0 = vlib_buffer_get_current (b0);
 191
 192           /*
 193            * udp_local hands us the DHCPV6 header.
 194            */
 195           u0 = (void *) h0 - (sizeof (*u0));
 196           ip0 = (void *) u0 - (sizeof (*ip0));
 197           e_h0 = (void *) ip0 - ethernet_buffer_header_size (b0);
 198
 199           clib_memcpy (client_src_mac, e_h0->src_address, 6);
 200
 201           switch (h0->msg_type)
 202             {
 203             case DHCPV6_MSG_SOLICIT:
 204             case DHCPV6_MSG_REQUEST:
 205             case DHCPV6_MSG_CONFIRM:
 206             case DHCPV6_MSG_RENEW:
 207             case DHCPV6_MSG_REBIND:
 208             case DHCPV6_MSG_RELEASE:
 209             case DHCPV6_MSG_DECLINE:
 210             case DHCPV6_MSG_INFORMATION_REQUEST:
 211             case DHCPV6_MSG_RELAY_FORW:
 212               /* send to server */
 213               break;
 214             case DHCPV6_MSG_RELAY_REPL:
 215               /* send to client */
 216               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_SEND_TO_CLIENT;
 217               error0 = 0;
 218               pkts_to_client++;
 219               goto do_enqueue;
 220             default:
 221               /* drop the packet */
 222               pkts_wrong_msg_type++;
 223               error0 = DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
 224               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 225               goto do_trace;
 226
 227             }
 228
 229           /* Send to DHCPV6 server via the configured FIB */
 230           rx_sw_if_index = sw_if_index =
 231             vnet_buffer (b0)->sw_if_index[VLIB_RX];
 232           rx_fib_idx = im->mfib_index_by_sw_if_index[rx_sw_if_index];
 233           proxy = dhcp_get_proxy (dpm, rx_fib_idx, FIB_PROTOCOL_IP6);
 234
 235           if (PREDICT_FALSE (NULL == proxy))
 236             {
 237               error0 = DHCPV6_PROXY_ERROR_NO_SERVER;
 238               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 239               goto do_trace;
 240             }
 241
 242           server = &proxy->dhcp_servers[0];
 243           server_fib_idx = server->server_fib_index;
 244           vnet_buffer (b0)->sw_if_index[VLIB_TX] = server_fib_idx;
 245
 246
 247           /* relay-option header pointer */
 248           vlib_buffer_advance (b0, -(sizeof (*fwd_opt)));
 249           fwd_opt = vlib_buffer_get_current (b0);
 250           /* relay message header pointer */
 251           vlib_buffer_advance (b0, -(sizeof (*r1)));
 252           r1 = vlib_buffer_get_current (b0);
 253
 254           vlib_buffer_advance (b0, -(sizeof (*u1)));
 255           u1 = vlib_buffer_get_current (b0);
 256
 257           vlib_buffer_advance (b0, -(sizeof (*ip1)));
 258           ip1 = vlib_buffer_get_current (b0);
 259
 260           /* fill in all that rubbish... */
 261           len = clib_net_to_host_u16 (u0->length) - sizeof (udp_header_t);
 262           copy_ip6_address (&r1->peer_addr, &ip0->src_address);
 263
 264           r1->msg_type = DHCPV6_MSG_RELAY_FORW;
 265           fwd_opt->length = clib_host_to_net_u16 (len);
 266           fwd_opt->option = clib_host_to_net_u16 (DHCPV6_OPTION_RELAY_MSG);
 267
 268           r1->hop_count++;
 269           r1->hop_count =
 270             (h0->msg_type != DHCPV6_MSG_RELAY_FORW) ? 0 : r1->hop_count;
 271
 272           if (PREDICT_FALSE (r1->hop_count >= HOP_COUNT_LIMIT))
 273             {
 274               error0 = DHCPV6_RELAY_PKT_DROP_MAX_HOPS;
 275               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 276               goto do_trace;
 277             }
 278
 279
 280           /* If relay-fwd and src address is site or global unicast address  */
 281           if (h0->msg_type == DHCPV6_MSG_RELAY_FORW &&
 282               ((ip0->src_address.as_u8[0] & 0xe0) == 0x20 ||
 283                (ip0->src_address.as_u8[0] & 0xfe) == 0xfc))
 284             {
 285               /* Set link address to zero */
 286               r1->link_addr.as_u64[0] = 0;
 287               r1->link_addr.as_u64[1] = 0;
 288               goto link_address_set;
 289             }
 290
 291           /* if receiving interface is unnumbered, use receiving interface
 292            * IP address as link address, otherwise use the loopback interface
 293            * IP address as link address.
 294            */
 295
 296           swif = vnet_get_sw_interface (vnm, rx_sw_if_index);
 297           if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
 298             sw_if_index = swif->unnumbered_sw_if_index;
 299
 300           ia0 =
 301             ip6_interface_first_global_or_site_address (&ip6_main,
 302                                                         sw_if_index);
 303           if (ia0 == 0)
 304             {
 305               error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
 306               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 307               pkts_no_interface_address++;
 308               goto do_trace;
 309             }
 310
 311           copy_ip6_address (&r1->link_addr, ia0);
 312
 313         link_address_set:
 314
 315           if ((b0->current_data + b0->current_length + sizeof (*id1) +
 316                sizeof (*vss1) + sizeof (*cmac)) >
 317               vlib_buffer_get_default_data_size (vm))
 318             {
 319               error0 = DHCPV6_PROXY_ERROR_PKT_TOO_BIG;
 320               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 321               pkts_too_big++;
 322               goto do_trace;
 323             }
 324
 325           id1 = (dhcpv6_int_id_t *) (((uword) ip1) + b0->current_length);
 326           b0->current_length += (sizeof (*id1));
 327
 328           id1->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_INTERFACE_ID);
 329           id1->opt.length = clib_host_to_net_u16 (sizeof (rx_sw_if_index));
 330           id1->int_idx = clib_host_to_net_u32 (rx_sw_if_index);
 331
 332           u1->length = 0;
 333           if (h0->msg_type != DHCPV6_MSG_RELAY_FORW)
 334             {
 335               cmac =
 336                 (dhcpv6_client_mac_t *) (((uword) ip1) + b0->current_length);
 337               b0->current_length += (sizeof (*cmac));
 338               cmac->opt.length = clib_host_to_net_u16 (sizeof (*cmac) -
 339                                                        sizeof (cmac->opt));
 340               cmac->opt.option =
 341                 clib_host_to_net_u16
 342                 (DHCPV6_OPTION_CLIENT_LINK_LAYER_ADDRESS);
 343               cmac->link_type = clib_host_to_net_u16 (1);       /* ethernet */
 344               clib_memcpy (cmac->data, client_src_mac, 6);
 345               u1->length += sizeof (*cmac);
 346             }
 347
 348           vss = dhcp_get_vss_info (dpm, rx_fib_idx, FIB_PROTOCOL_IP6);
 349
 350           if (vss)
 351             {
 352               u16 id_len;       /* length of VPN ID */
 353               u16 type_len = sizeof (vss1->vss_type);
 354
 355               vss1 = (dhcpv6_vss_t *) (((uword) ip1) + b0->current_length);
 356               vss1->vss_type = vss->vss_type;
 357               if (vss->vss_type == VSS_TYPE_VPN_ID)
 358                 {
 359                   id_len = sizeof (vss->vpn_id);        /* vpn_id is 7 bytes */
 360                   memcpy (vss1->data, vss->vpn_id, id_len);
 361                 }
 362               else if (vss->vss_type == VSS_TYPE_ASCII)
 363                 {
 364                   id_len = vec_len (vss->vpn_ascii_id);
 365                   memcpy (vss1->data, vss->vpn_ascii_id, id_len);
 366                 }
 367               else              /* must be VSS_TYPE_DEFAULT, no VPN ID */
 368                 id_len = 0;
 369
 370               vss1->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_VSS);
 371               vss1->opt.length = clib_host_to_net_u16 (type_len + id_len);
 372               u1->length += type_len + id_len + sizeof (vss1->opt);
 373               b0->current_length += type_len + id_len + sizeof (vss1->opt);
 374             }
 375
 376           pkts_to_server++;
 377           u1->checksum = 0;
 378           u1->src_port = clib_host_to_net_u16 (UDP_DST_PORT_dhcpv6_to_client);
 379           u1->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_dhcpv6_to_server);
 380
 381           u1->length =
 382             clib_host_to_net_u16 (clib_net_to_host_u16 (fwd_opt->length) +
 383                                   sizeof (*r1) + sizeof (*fwd_opt) +
 384                                   sizeof (*u1) + sizeof (*id1) + u1->length);
 385
 386           clib_memset (ip1, 0, sizeof (*ip1));
 387           ip1->ip_version_traffic_class_and_flow_label = 0x60;
 388           ip1->payload_length = u1->length;
 389           ip1->protocol = PROTO_UDP;
 390           ip1->hop_limit = HOP_COUNT_LIMIT;
 391           src = ((server->dhcp_server.ip6.as_u64[0] ||
 392                   server->dhcp_server.ip6.as_u64[1]) ?
 393                  &server->dhcp_server.ip6 : &all_dhcpv6_server_address);
 394           copy_ip6_address (&ip1->dst_address, src);
 395
 396
 397           ia0 = ip6_interface_first_global_or_site_address
 398             (&ip6_main, vnet_buffer (b0)->sw_if_index[VLIB_RX]);
 399
 400           src = (proxy->dhcp_src_address.ip6.as_u64[0] ||
 401                  proxy->dhcp_src_address.ip6.as_u64[1]) ?
 402             &proxy->dhcp_src_address.ip6 : ia0;
 403           if (ia0 == 0)
 404             {
 405               error0 = DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS;
 406               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 407               pkts_no_src_address++;
 408               goto do_trace;
 409             }
 410
 411           copy_ip6_address (&ip1->src_address, src);
 412
 413
 414           u1->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip1,
 415                                                             &bogus_length);
 416           ASSERT (bogus_length == 0);
 417
 418           next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP;
 419
 420           is_solicit = (DHCPV6_MSG_SOLICIT == h0->msg_type);
 421
 422           /*
 423            * If we have multiple servers configured and this is the
 424            * client's discover message, then send copies to each of
 425            * those servers
 426            */
 427           if (is_solicit && vec_len (proxy->dhcp_servers) > 1)
 428             {
 429               u32 ii;
 430
 431               for (ii = 1; ii < vec_len (proxy->dhcp_servers); ii++)
 432                 {
 433                   vlib_buffer_t *c0;
 434                   u32 ci0;
 435
 436                   c0 = vlib_buffer_copy (vm, b0);
 437                   if (c0 == NULL)
 438                     {
 439                       vlib_node_increment_counter
 440                         (vm, dhcpv6_proxy_to_server_node.index,
 441                          DHCPV6_PROXY_ERROR_ALLOC_FAIL, 1);
 442                       continue;
 443                     }
 444                   ci0 = vlib_get_buffer_index (vm, c0);
 445                   server = &proxy->dhcp_servers[ii];
 446
 447                   ip0 = vlib_buffer_get_current (c0);
 448
 449                   src = ((server->dhcp_server.ip6.as_u64[0] ||
 450                           server->dhcp_server.ip6.as_u64[1]) ?
 451                          &server->dhcp_server.ip6 :
 452                          &all_dhcpv6_server_address);
 453                   copy_ip6_address (&ip1->dst_address, src);
 454
 455                   to_next[0] = ci0;
 456                   to_next += 1;
 457                   n_left_to_next -= 1;
 458
 459                   vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 460                                                    to_next, n_left_to_next,
 461                                                    ci0, next0);
 462
 463                   if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 464                     {
 465                       dhcpv6_proxy_trace_t *tr;
 466
 467                       tr = vlib_add_trace (vm, node, c0, sizeof (*tr));
 468                       tr->which = 0;    /* to server */
 469                       tr->error = error0;
 470                       tr->original_sw_if_index = rx_sw_if_index;
 471                       tr->sw_if_index = sw_if_index;
 472                       if (next0 == DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP)
 473                         copy_ip6_address ((ip6_address_t *) &
 474                                           tr->packet_data[0],
 475                                           &server->dhcp_server.ip6);
 476                     }
 477
 478                   if (PREDICT_FALSE (0 == n_left_to_next))
 479                     {
 480                       vlib_put_next_frame (vm, node, next_index,
 481                                            n_left_to_next);
 482                       vlib_get_next_frame (vm, node, next_index,
 483                                            to_next, n_left_to_next);
 484                     }
 485                 }
 486             }
 487
 488         do_trace:
 489           if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 490             {
 491               dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
 492                                                          b0, sizeof (*tr));
 493               tr->which = 0;    /* to server */
 494               tr->error = error0;
 495               tr->original_sw_if_index = rx_sw_if_index;
 496               tr->sw_if_index = sw_if_index;
 497               if (DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP == next0)
 498                 copy_ip6_address ((ip6_address_t *) & tr->packet_data[0],
 499                                   &server->dhcp_server.ip6);
 500             }
 501
 502         do_enqueue:
 503           to_next[0] = bi0;
 504           to_next += 1;
 505           n_left_to_next -= 1;
 506
 507           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 508                                            to_next, n_left_to_next,
 509                                            bi0, next0);
 510         }
 511
 512       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 513     }
 514
 515   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 516                                DHCPV6_PROXY_ERROR_RELAY_TO_CLIENT,
 517                                pkts_to_client);
 518   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 519                                DHCPV6_PROXY_ERROR_RELAY_TO_SERVER,
 520                                pkts_to_server);
 521   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 522                                DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS,
 523                                pkts_no_interface_address);
 524   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 525                                DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE,
 526                                pkts_wrong_msg_type);
 527   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 528                                DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS,
 529                                pkts_no_src_address);
 530   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 531                                DHCPV6_PROXY_ERROR_PKT_TOO_BIG, pkts_too_big);
 532   return from_frame->n_vectors;
 533 }
 534
 535 /* *INDENT-OFF* */
 536 VLIB_REGISTER_NODE (dhcpv6_proxy_to_server_node, static) = {
 537   .function = dhcpv6_proxy_to_server_input,
 538   .name = "dhcpv6-proxy-to-server",
 539   /* Takes a vector of packets. */
 540   .vector_size = sizeof (u32),
 541
 542   .n_errors = DHCPV6_PROXY_N_ERROR,
 543   .error_strings = dhcpv6_proxy_error_strings,
 544
 545   .n_next_nodes = DHCPV6_PROXY_TO_SERVER_INPUT_N_NEXT,
 546   .next_nodes = {
 547 #define _(s,n) [DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s] = n,
 548     foreach_dhcpv6_proxy_to_server_input_next
 549 #undef _
 550   },
 551
 552   .format_buffer = format_dhcpv6_proxy_header_with_length,
 553   .format_trace = format_dhcpv6_proxy_trace,
 554 #if 0
 555   .unformat_buffer = unformat_dhcpv6_proxy_header,
 556 #endif
 557 };
 558 /* *INDENT-ON* */
 559
 560 static uword
 561 dhcpv6_proxy_to_client_input (vlib_main_t * vm,
 562                               vlib_node_runtime_t * node,
 563                               vlib_frame_t * from_frame)
 564 {
 565
 566   u32 n_left_from, *from;
 567   ethernet_main_t *em = vnet_get_ethernet_main ();
 568   dhcp_proxy_main_t *dm = &dhcp_proxy_main;
 569   dhcp_proxy_t *proxy;
 570   dhcp_server_t *server;
 571   vnet_main_t *vnm = vnet_get_main ();
 572   int bogus_length;
 573
 574   from = vlib_frame_vector_args (from_frame);
 575   n_left_from = from_frame->n_vectors;
 576
 577   while (n_left_from > 0)
 578     {
 579       u32 bi0;
 580       vlib_buffer_t *b0;
 581       udp_header_t *u0, *u1 = 0;
 582       dhcpv6_relay_hdr_t *h0;
 583       ip6_header_t *ip1 = 0, *ip0;
 584       ip6_address_t *ia0 = 0;
 585       ip6_address_t client_address;
 586       ethernet_interface_t *ei0;
 587       ethernet_header_t *mac0;
 588       vnet_hw_interface_t *hi0;
 589       vlib_frame_t *f0;
 590       u32 *to_next0;
 591       u32 sw_if_index = ~0;
 592       u32 original_sw_if_index = ~0;
 593       vnet_sw_interface_t *si0;
 594       u32 inner_vlan = (u32) ~ 0;
 595       u32 outer_vlan = (u32) ~ 0;
 596       u32 error0 = (u32) ~ 0;
 597       vnet_sw_interface_t *swif;
 598       dhcpv6_option_t *r0 = 0, *o;
 599       u16 len = 0;
 600       u8 interface_opt_flag = 0;
 601       u8 relay_msg_opt_flag = 0;
 602       ip6_main_t *im = &ip6_main;
 603       u32 server_fib_idx, client_fib_idx;
 604
 605       bi0 = from[0];
 606       from += 1;
 607       n_left_from -= 1;
 608
 609       b0 = vlib_get_buffer (vm, bi0);
 610       h0 = vlib_buffer_get_current (b0);
 611
 612       if (DHCPV6_MSG_RELAY_REPL != h0->msg_type)
 613         {
 614           error0 = DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
 615
 616         drop_packet:
 617           vlib_node_increment_counter (vm, dhcpv6_proxy_to_client_node.index,
 618                                        error0, 1);
 619
 620           f0 = vlib_get_frame_to_node (vm, dm->error_drop_node_index);
 621           to_next0 = vlib_frame_vector_args (f0);
 622           to_next0[0] = bi0;
 623           f0->n_vectors = 1;
 624           vlib_put_frame_to_node (vm, dm->error_drop_node_index, f0);
 625           goto do_trace;
 626         }
 627       /* hop count seems not need to be checked */
 628       if (HOP_COUNT_LIMIT < h0->hop_count)
 629         {
 630           error0 = DHCPV6_RELAY_PKT_DROP_MAX_HOPS;
 631           goto drop_packet;
 632         }
 633       u0 = (void *) h0 - (sizeof (*u0));
 634       ip0 = (void *) u0 - (sizeof (*ip0));
 635
 636       vlib_buffer_advance (b0, sizeof (*h0));
 637       o = vlib_buffer_get_current (b0);
 638
 639       /* Parse through TLVs looking for option 18 (DHCPV6_OPTION_INTERFACE_ID)
 640          _and_ option 9 (DHCPV6_OPTION_RELAY_MSG) option which must be there.
 641          Currently assuming no other options need to be processed
 642          The interface-ID is the FIB number we need
 643          to track down the client-facing interface */
 644
 645       while ((u8 *) o < (b0->data + b0->current_data + b0->current_length))
 646         {
 647           if (DHCPV6_OPTION_INTERFACE_ID == clib_net_to_host_u16 (o->option))
 648             {
 649               interface_opt_flag = 1;
 650               if (clib_net_to_host_u16 (o->length) == sizeof (sw_if_index))
 651                 sw_if_index =
 652                   clib_net_to_host_u32 (((dhcpv6_int_id_t *) o)->int_idx);
 653               if (sw_if_index >= vec_len (im->fib_index_by_sw_if_index))
 654                 {
 655                   error0 = DHCPV6_PROXY_ERROR_WRONG_INTERFACE_ID_OPTION;
 656                   goto drop_packet;
 657                 }
 658             }
 659           if (DHCPV6_OPTION_RELAY_MSG == clib_net_to_host_u16 (o->option))
 660             {
 661               relay_msg_opt_flag = 1;
 662               r0 = vlib_buffer_get_current (b0);
 663             }
 664           if ((relay_msg_opt_flag == 1) && (interface_opt_flag == 1))
 665             break;
 666           vlib_buffer_advance (b0,
 667                                sizeof (*o) +
 668                                clib_net_to_host_u16 (o->length));
 669           o =
 670             (dhcpv6_option_t *) (((uword) o) +
 671                                  clib_net_to_host_u16 (o->length) +
 672                                  sizeof (*o));
 673         }
 674
 675       if ((relay_msg_opt_flag == 0) || (r0 == 0))
 676         {
 677           error0 = DHCPV6_PROXY_ERROR_NO_RELAY_MESSAGE_OPTION;
 678           goto drop_packet;
 679         }
 680
 681       if ((u32) ~ 0 == sw_if_index)
 682         {
 683           error0 = DHCPV6_PROXY_ERROR_NO_CIRCUIT_ID_OPTION;
 684           goto drop_packet;
 685         }
 686
 687       //Advance buffer to start of encapsulated DHCPv6 message
 688       vlib_buffer_advance (b0, sizeof (*r0));
 689
 690       client_fib_idx = im->mfib_index_by_sw_if_index[sw_if_index];
 691       proxy = dhcp_get_proxy (dm, client_fib_idx, FIB_PROTOCOL_IP6);
 692
 693       if (NULL == proxy)
 694         {
 695           error0 = DHCPV6_PROXY_ERROR_NO_SERVER;
 696           goto drop_packet;
 697         }
 698
 699       server_fib_idx = im->fib_index_by_sw_if_index
 700         [vnet_buffer (b0)->sw_if_index[VLIB_RX]];
 701
 702       vec_foreach (server, proxy->dhcp_servers)
 703       {
 704         if (server_fib_idx == server->server_fib_index &&
 705             ip0->src_address.as_u64[0] == server->dhcp_server.ip6.as_u64[0] &&
 706             ip0->src_address.as_u64[1] == server->dhcp_server.ip6.as_u64[1])
 707           {
 708             goto server_found;
 709           }
 710       }
 711
 712       //drop packet if not from server with configured address or FIB
 713       error0 = DHCPV6_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS;
 714       goto drop_packet;
 715
 716     server_found:
 717       vnet_buffer (b0)->sw_if_index[VLIB_TX] = original_sw_if_index
 718         = sw_if_index;
 719
 720       swif = vnet_get_sw_interface (vnm, original_sw_if_index);
 721       if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
 722         sw_if_index = swif->unnumbered_sw_if_index;
 723
 724
 725       /*
 726        * udp_local hands us the DHCPV6 header, need udp hdr,
 727        * ip hdr to relay to client
 728        */
 729       vlib_buffer_advance (b0, -(sizeof (*u1)));
 730       u1 = vlib_buffer_get_current (b0);
 731
 732       vlib_buffer_advance (b0, -(sizeof (*ip1)));
 733       ip1 = vlib_buffer_get_current (b0);
 734
 735       copy_ip6_address (&client_address, &h0->peer_addr);
 736
 737       ia0 = ip6_interface_first_address (&ip6_main, sw_if_index);
 738       if (ia0 == 0)
 739         {
 740           error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
 741           goto drop_packet;
 742         }
 743
 744       len = clib_net_to_host_u16 (r0->length);
 745       clib_memset (ip1, 0, sizeof (*ip1));
 746       copy_ip6_address (&ip1->dst_address, &client_address);
 747       u1->checksum = 0;
 748       u1->src_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_server);
 749       u1->dst_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_client);
 750       u1->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
 751
 752       ip1->ip_version_traffic_class_and_flow_label =
 753         ip0->ip_version_traffic_class_and_flow_label & 0x00000fff;
 754       ip1->payload_length = u1->length;
 755       ip1->protocol = PROTO_UDP;
 756       ip1->hop_limit = HOP_COUNT_LIMIT;
 757       copy_ip6_address (&ip1->src_address, ia0);
 758
 759       u1->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip1,
 760                                                         &bogus_length);
 761       ASSERT (bogus_length == 0);
 762
 763       vlib_buffer_advance (b0, -(sizeof (ethernet_header_t)));
 764       si0 = vnet_get_sw_interface (vnm, original_sw_if_index);
 765       if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
 766         {
 767           if (si0->sub.eth.flags.one_tag == 1)
 768             {
 769               vlib_buffer_advance (b0, -4 /* space for 1 VLAN tag */ );
 770               outer_vlan = (si0->sub.eth.outer_vlan_id << 16) | 0x86dd;
 771             }
 772           else if (si0->sub.eth.flags.two_tags == 1)
 773             {
 774               vlib_buffer_advance (b0, -8 /* space for 2 VLAN tag */ );
 775               outer_vlan = (si0->sub.eth.outer_vlan_id << 16) | 0x8100;
 776               inner_vlan = (si0->sub.eth.inner_vlan_id << 16) | 0x86dd;
 777             }
 778         }
 779
 780       mac0 = vlib_buffer_get_current (b0);
 781
 782       hi0 = vnet_get_sup_hw_interface (vnm, original_sw_if_index);
 783       ei0 = pool_elt_at_index (em->interfaces, hi0->hw_instance);
 784       clib_memcpy (mac0->src_address, &ei0->address,
 785                    sizeof (mac0->src_address));
 786       clib_memset (&mac0->dst_address, 0xff, sizeof (mac0->dst_address));
 787
 788       if (si0->type == VNET_SW_INTERFACE_TYPE_SUB && outer_vlan != (u32) ~ 0)
 789         {
 790           mac0->type = (si0->sub.eth.flags.dot1ad == 1) ?
 791             clib_net_to_host_u16 (0x88a8) : clib_net_to_host_u16 (0x8100);
 792           u32 *vlan_tag = (u32 *) (mac0 + 1);
 793           *vlan_tag = clib_host_to_net_u32 (outer_vlan);
 794           if (inner_vlan != (u32) ~ 0)
 795             {
 796               u32 *inner_vlan_tag = (u32 *) (vlan_tag + 1);
 797               *inner_vlan_tag = clib_host_to_net_u32 (inner_vlan);
 798             }
 799         }
 800       else
 801         {
 802           mac0->type = clib_net_to_host_u16 (0x86dd);
 803         }
 804
 805       /* $$$ consider adding a dynamic next to the graph node, for performance */
 806       f0 = vlib_get_frame_to_node (vm, hi0->output_node_index);
 807       to_next0 = vlib_frame_vector_args (f0);
 808       to_next0[0] = bi0;
 809       f0->n_vectors = 1;
 810       vlib_put_frame_to_node (vm, hi0->output_node_index, f0);
 811
 812     do_trace:
 813       if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 814         {
 815           dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
 816                                                      b0, sizeof (*tr));
 817           tr->which = 1;        /* to client */
 818           if (ia0)
 819             copy_ip6_address ((ip6_address_t *) tr->packet_data, ia0);
 820           tr->error = error0;
 821           tr->original_sw_if_index = original_sw_if_index;
 822           tr->sw_if_index = sw_if_index;
 823         }
 824     }
 825   return from_frame->n_vectors;
 826
 827 }
 828
 829 /* *INDENT-OFF* */
 830 VLIB_REGISTER_NODE (dhcpv6_proxy_to_client_node, static) = {
 831   .function = dhcpv6_proxy_to_client_input,
 832   .name = "dhcpv6-proxy-to-client",
 833   /* Takes a vector of packets. */
 834   .vector_size = sizeof (u32),
 835
 836   .n_errors = DHCPV6_PROXY_N_ERROR,
 837   .error_strings = dhcpv6_proxy_error_strings,
 838   .format_buffer = format_dhcpv6_proxy_header_with_length,
 839   .format_trace = format_dhcpv6_proxy_trace,
 840 #if 0
 841   .unformat_buffer = unformat_dhcpv6_proxy_header,
 842 #endif
 843 };
 844 /* *INDENT-ON* */
 845
 846 static clib_error_t *
 847 dhcp6_proxy_init (vlib_main_t * vm)
 848 {
 849   dhcp_proxy_main_t *dm = &dhcp_proxy_main;
 850   vlib_node_t *error_drop_node;
 851
 852   error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
 853   dm->error_drop_node_index = error_drop_node->index;
 854
 855   /* RFC says this is the dhcpv6 server address  */
 856   all_dhcpv6_server_address.as_u64[0] =
 857     clib_host_to_net_u64 (0xFF05000000000000);
 858   all_dhcpv6_server_address.as_u64[1] = clib_host_to_net_u64 (0x00010003);
 859
 860   /* RFC says this is the server and agent address */
 861   all_dhcpv6_server_relay_agent_address.as_u64[0] =
 862     clib_host_to_net_u64 (0xFF02000000000000);
 863   all_dhcpv6_server_relay_agent_address.as_u64[1] =
 864     clib_host_to_net_u64 (0x00010002);
 865
 866   return 0;
 867 }
 868
 869 VLIB_INIT_FUNCTION (dhcp6_proxy_init);
 870
 871 int
 872 dhcp6_proxy_set_server (ip46_address_t * addr,
 873                         ip46_address_t * src_addr,
 874                         u32 rx_table_id, u32 server_table_id, int is_del)
 875 {
 876   vlib_main_t *vm = vlib_get_main ();
 877   u32 rx_fib_index = 0;
 878   int rc = 0;
 879
 880   const mfib_prefix_t all_dhcp_servers = {
 881     .fp_len = 128,
 882     .fp_proto = FIB_PROTOCOL_IP6,
 883     .fp_grp_addr = {
 884                     .ip6 = all_dhcpv6_server_relay_agent_address,
 885                     }
 886   };
 887
 888   if (ip46_address_is_zero (addr))
 889     return VNET_API_ERROR_INVALID_DST_ADDRESS;
 890
 891   if (ip46_address_is_zero (src_addr))
 892     return VNET_API_ERROR_INVALID_SRC_ADDRESS;
 893
 894   rx_fib_index = mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
 895                                                      rx_table_id,
 896                                                      MFIB_SOURCE_DHCP);
 897
 898   if (is_del)
 899     {
 900       if (dhcp_proxy_server_del (FIB_PROTOCOL_IP6, rx_fib_index,
 901                                  addr, server_table_id))
 902         {
 903           mfib_table_entry_delete (rx_fib_index,
 904                                    &all_dhcp_servers, MFIB_SOURCE_DHCP);
 905           mfib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP6,
 906                              MFIB_SOURCE_DHCP);
 907
 908           udp_unregister_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
 909                                    0 /* is_ip6 */ );
 910           udp_unregister_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
 911                                    0 /* is_ip6 */ );
 912         }
 913     }
 914   else
 915     {
 916       const fib_route_path_t path_for_us = {
 917         .frp_proto = DPO_PROTO_IP6,
 918         .frp_addr = zero_addr,
 919         .frp_sw_if_index = 0xffffffff,
 920         .frp_fib_index = ~0,
 921         .frp_weight = 1,
 922         .frp_flags = FIB_ROUTE_PATH_LOCAL,
 923         .frp_mitf_flags = MFIB_ITF_FLAG_FORWARD,
 924       };
 925       if (dhcp_proxy_server_add (FIB_PROTOCOL_IP6, addr, src_addr,
 926                                  rx_fib_index, server_table_id))
 927         {
 928           mfib_table_entry_path_update (rx_fib_index, &all_dhcp_servers,
 929                                         MFIB_SOURCE_DHCP, MFIB_ENTRY_FLAG_NONE,
 930                                         &path_for_us);
 931           /*
 932            * Each interface that is enabled in this table, needs to be added
 933            * as an accepting interface, but this is not easily doable in VPP.
 934            * So we cheat. Add a flag to the entry that indicates accept form
 935            * any interface.
 936            * We will still only accept on v6 enabled interfaces, since the
 937            * input feature ensures this.
 938            */
 939           mfib_table_entry_update (rx_fib_index,
 940                                    &all_dhcp_servers,
 941                                    MFIB_SOURCE_DHCP,
 942                                    MFIB_RPF_ID_NONE,
 943                                    MFIB_ENTRY_FLAG_ACCEPT_ALL_ITF);
 944           mfib_table_lock (rx_fib_index, FIB_PROTOCOL_IP6, MFIB_SOURCE_DHCP);
 945
 946           udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
 947                                  dhcpv6_proxy_to_client_node.index,
 948                                  0 /* is_ip6 */ );
 949           udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
 950                                  dhcpv6_proxy_to_server_node.index,
 951                                  0 /* is_ip6 */ );
 952         }
 953     }
 954
 955   mfib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP6, MFIB_SOURCE_DHCP);
 956
 957   return (rc);
 958 }
 959
 960 static clib_error_t *
 961 dhcpv6_proxy_set_command_fn (vlib_main_t * vm,
 962                              unformat_input_t * input,
 963                              vlib_cli_command_t * cmd)
 964 {
 965   ip46_address_t addr, src_addr;
 966   int set_server = 0, set_src_address = 0;
 967   u32 rx_table_id = 0, server_table_id = 0;
 968   int is_del = 0;
 969
 970   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 971     {
 972       if (unformat (input, "server %U", unformat_ip6_address, &addr.ip6))
 973         set_server = 1;
 974       else if (unformat (input, "src-address %U",
 975                          unformat_ip6_address, &src_addr.ip6))
 976         set_src_address = 1;
 977       else if (unformat (input, "server-fib-id %d", &server_table_id))
 978         ;
 979       else if (unformat (input, "rx-fib-id %d", &rx_table_id))
 980         ;
 981       else if (unformat (input, "delete") || unformat (input, "del"))
 982         is_del = 1;
 983       else
 984         break;
 985     }
 986
 987   if (is_del || (set_server && set_src_address))
 988     {
 989       int rv;
 990
 991       rv = dhcp6_proxy_set_server (&addr, &src_addr, rx_table_id,
 992                                    server_table_id, is_del);
 993
 994       //TODO: Complete the errors
 995       switch (rv)
 996         {
 997         case 0:
 998           return 0;
 999
1000         case VNET_API_ERROR_INVALID_DST_ADDRESS:
1001           return clib_error_return (0, "Invalid server address");
1002
1003         case VNET_API_ERROR_INVALID_SRC_ADDRESS:
1004           return clib_error_return (0, "Invalid src address");
1005
1006         case VNET_API_ERROR_NO_SUCH_ENTRY:
1007           return clib_error_return
1008             (0, "Fib id %d: no per-fib DHCP server configured", rx_table_id);
1009
1010         default:
1011           return clib_error_return (0, "BUG: rv %d", rv);
1012         }
1013     }
1014   else
1015     return clib_error_return (0, "parse error`%U'",
1016                               format_unformat_error, input);
1017 }
1018
1019 /* *INDENT-OFF* */
1020 VLIB_CLI_COMMAND (dhcpv6_proxy_set_command, static) = {
1021   .path = "set dhcpv6 proxy",
1022   .short_help = "set dhcpv6 proxy [del] server <ipv6-addr> src-address <ipv6-addr> "
1023                   "[server-fib-id <fib-id>] [rx-fib-id <fib-id>] ",
1024   .function = dhcpv6_proxy_set_command_fn,
1025 };
1026 /* *INDENT-ON* */
1027
1028 static u8 *
1029 format_dhcp6_proxy_server (u8 * s, va_list * args)
1030 {
1031   dhcp_proxy_t *proxy = va_arg (*args, dhcp_proxy_t *);
1032   fib_table_t *server_fib;
1033   dhcp_server_t *server;
1034   ip6_mfib_t *rx_fib;
1035
1036   if (proxy == 0)
1037     {
1038       s = format (s, "%=14s%=16s%s", "RX FIB", "Src Address",
1039                   "Servers FIB,Address");
1040       return s;
1041     }
1042
1043   rx_fib = ip6_mfib_get (proxy->rx_fib_index);
1044
1045   s = format (s, "%=14u%=16U",
1046               rx_fib->table_id,
1047               format_ip46_address, &proxy->dhcp_src_address, IP46_TYPE_ANY);
1048
1049   vec_foreach (server, proxy->dhcp_servers)
1050   {
1051     server_fib = fib_table_get (server->server_fib_index, FIB_PROTOCOL_IP6);
1052     s = format (s, "%u,%U  ",
1053                 server_fib->ft_table_id,
1054                 format_ip46_address, &server->dhcp_server, IP46_TYPE_ANY);
1055   }
1056
1057   return s;
1058 }
1059
1060 static int
1061 dhcp6_proxy_show_walk (dhcp_proxy_t * proxy, void *ctx)
1062 {
1063   vlib_main_t *vm = ctx;
1064
1065   vlib_cli_output (vm, "%U", format_dhcp6_proxy_server, proxy);
1066
1067   return (1);
1068 }
1069
1070 static clib_error_t *
1071 dhcpv6_proxy_show_command_fn (vlib_main_t * vm,
1072                               unformat_input_t * input,
1073                               vlib_cli_command_t * cmd)
1074 {
1075   vlib_cli_output (vm, "%U", format_dhcp6_proxy_server,
1076                    NULL /* header line */ );
1077
1078   dhcp_proxy_walk (FIB_PROTOCOL_IP6, dhcp6_proxy_show_walk, vm);
1079
1080   return (NULL);
1081 }
1082
1083 /* *INDENT-OFF* */
1084 VLIB_CLI_COMMAND (dhcpv6_proxy_show_command, static) = {
1085   .path = "show dhcpv6 proxy",
1086   .short_help = "Display dhcpv6 proxy info",
1087   .function = dhcpv6_proxy_show_command_fn,
1088 };
1089 /* *INDENT-ON* */
1090
1091 static clib_error_t *
1092 dhcpv6_vss_command_fn (vlib_main_t * vm,
1093                        unformat_input_t * input, vlib_cli_command_t * cmd)
1094 {
1095   u8 is_del = 0, vss_type = VSS_TYPE_DEFAULT;
1096   u8 *vpn_ascii_id = 0;
1097   u32 oui = 0, fib_id = 0, tbl_id = ~0;
1098
1099   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1100     {
1101       if (unformat (input, "table %d", &tbl_id))
1102         ;
1103       else if (unformat (input, "oui %d", &oui))
1104         vss_type = VSS_TYPE_VPN_ID;
1105       else if (unformat (input, "vpn-id %d", &fib_id))
1106         vss_type = VSS_TYPE_VPN_ID;
1107       else if (unformat (input, "vpn-ascii-id %s", &vpn_ascii_id))
1108         vss_type = VSS_TYPE_ASCII;
1109       else if (unformat (input, "delete") || unformat (input, "del"))
1110         is_del = 1;
1111       else
1112         break;
1113     }
1114
1115   if (tbl_id == ~0)
1116     return clib_error_return (0, "no table ID specified.");
1117
1118   int rv = dhcp_proxy_set_vss (FIB_PROTOCOL_IP6, tbl_id, vss_type,
1119                                vpn_ascii_id, oui, fib_id, is_del);
1120   switch (rv)
1121     {
1122     case 0:
1123       return 0;
1124     case VNET_API_ERROR_NO_SUCH_ENTRY:
1125       return clib_error_return (0, "vss for table %d not found in pool.",
1126                                 tbl_id);
1127     default:
1128       return clib_error_return (0, "BUG: rv %d", rv);
1129     }
1130 }
1131
1132 /* *INDENT-OFF* */
1133 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_command, static) = {
1134   .path = "set dhcpv6 vss",
1135   .short_help = "set dhcpv6 vss table <table-id> [oui <n> vpn-id <n> | vpn-ascii-id <text>]",
1136   .function = dhcpv6_vss_command_fn,
1137 };
1138 /* *INDENT-ON* */
1139
1140 static clib_error_t *
1141 dhcpv6_vss_show_command_fn (vlib_main_t * vm,
1142                             unformat_input_t * input,
1143                             vlib_cli_command_t * cmd)
1144 {
1145   dhcp_vss_walk (FIB_PROTOCOL_IP6, dhcp_vss_show_walk, vm);
1146
1147   return (NULL);
1148 }
1149
1150 /* *INDENT-OFF* */
1151 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_show_command, static) = {
1152   .path = "show dhcpv6 vss",
1153   .short_help = "show dhcpv6 VSS",
1154   .function = dhcpv6_vss_show_command_fn,
1155 };
1156 /* *INDENT-ON* */
1157
1158 static clib_error_t *
1159 dhcpv6_link_address_show_command_fn (vlib_main_t * vm,
1160                                      unformat_input_t * input,
1161                                      vlib_cli_command_t * cmd)
1162 {
1163   vnet_main_t *vnm = vnet_get_main ();
1164   u32 sw_if_index0 = 0, sw_if_index;
1165   vnet_sw_interface_t *swif;
1166   ip6_address_t *ia0;
1167
1168   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1169     {
1170
1171       if (unformat (input, "%U",
1172                     unformat_vnet_sw_interface, vnm, &sw_if_index0))
1173         {
1174           swif = vnet_get_sw_interface (vnm, sw_if_index0);
1175           sw_if_index = (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) ?
1176             swif->unnumbered_sw_if_index : sw_if_index0;
1177           ia0 = ip6_interface_first_address (&ip6_main, sw_if_index);
1178           if (ia0)
1179             {
1180               vlib_cli_output (vm, "%=20s%=48s", "interface", "link-address");
1181
1182               vlib_cli_output (vm, "%=20U%=48U",
1183                                format_vnet_sw_if_index_name, vnm,
1184                                sw_if_index0, format_ip6_address, ia0);
1185             }
1186           else
1187             vlib_cli_output (vm, "%=34s%=20U",
1188                              "No IPv6 address configured on",
1189                              format_vnet_sw_if_index_name, vnm, sw_if_index);
1190         }
1191       else
1192         break;
1193     }
1194
1195   return 0;
1196 }
1197
1198 /* *INDENT-OFF* */
1199 VLIB_CLI_COMMAND (dhcpv6_proxy_address_show_command, static) = {
1200   .path = "show dhcpv6 link-address interface",
1201   .short_help = "show dhcpv6 link-address interface <interface>",
1202   .function = dhcpv6_link_address_show_command_fn,
1203 };
1204 /* *INDENT-ON* */
1205
1206 /*
1207  * fd.io coding-style-patch-verification: ON
1208  *
1209  * Local Variables:
1210  * eval: (c-set-style "gnu")
1211  * End:
1212  */