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           vlib_buffer_free_list_t *fl;
 183           dhcp_vss_t *vss;
 184           u8 is_solicit = 0;
 185
 186           bi0 = from[0];
 187           from += 1;
 188           n_left_from -= 1;
 189
 190           b0 = vlib_get_buffer (vm, bi0);
 191
 192           h0 = vlib_buffer_get_current (b0);
 193
 194           /*
 195            * udp_local hands us the DHCPV6 header.
 196            */
 197           u0 = (void *) h0 - (sizeof (*u0));
 198           ip0 = (void *) u0 - (sizeof (*ip0));
 199           e_h0 = (void *) ip0 - ethernet_buffer_header_size (b0);
 200
 201           clib_memcpy (client_src_mac, e_h0->src_address, 6);
 202
 203           switch (h0->msg_type)
 204             {
 205             case DHCPV6_MSG_SOLICIT:
 206             case DHCPV6_MSG_REQUEST:
 207             case DHCPV6_MSG_CONFIRM:
 208             case DHCPV6_MSG_RENEW:
 209             case DHCPV6_MSG_REBIND:
 210             case DHCPV6_MSG_RELEASE:
 211             case DHCPV6_MSG_DECLINE:
 212             case DHCPV6_MSG_INFORMATION_REQUEST:
 213             case DHCPV6_MSG_RELAY_FORW:
 214               /* send to server */
 215               break;
 216             case DHCPV6_MSG_RELAY_REPL:
 217               /* send to client */
 218               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_SEND_TO_CLIENT;
 219               error0 = 0;
 220               pkts_to_client++;
 221               goto do_enqueue;
 222             default:
 223               /* drop the packet */
 224               pkts_wrong_msg_type++;
 225               error0 = DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
 226               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 227               goto do_trace;
 228
 229             }
 230
 231           /* Send to DHCPV6 server via the configured FIB */
 232           rx_sw_if_index = sw_if_index =
 233             vnet_buffer (b0)->sw_if_index[VLIB_RX];
 234           rx_fib_idx = im->mfib_index_by_sw_if_index[rx_sw_if_index];
 235           proxy = dhcp_get_proxy (dpm, rx_fib_idx, FIB_PROTOCOL_IP6);
 236
 237           if (PREDICT_FALSE (NULL == proxy))
 238             {
 239               error0 = DHCPV6_PROXY_ERROR_NO_SERVER;
 240               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 241               pkts_no_server++;
 242               goto do_trace;
 243             }
 244
 245           server = &proxy->dhcp_servers[0];
 246           server_fib_idx = server->server_fib_index;
 247           vnet_buffer (b0)->sw_if_index[VLIB_TX] = server_fib_idx;
 248
 249
 250           /* relay-option header pointer */
 251           vlib_buffer_advance (b0, -(sizeof (*fwd_opt)));
 252           fwd_opt = vlib_buffer_get_current (b0);
 253           /* relay message header pointer */
 254           vlib_buffer_advance (b0, -(sizeof (*r1)));
 255           r1 = vlib_buffer_get_current (b0);
 256
 257           vlib_buffer_advance (b0, -(sizeof (*u1)));
 258           u1 = vlib_buffer_get_current (b0);
 259
 260           vlib_buffer_advance (b0, -(sizeof (*ip1)));
 261           ip1 = vlib_buffer_get_current (b0);
 262
 263           /* fill in all that rubbish... */
 264           len = clib_net_to_host_u16 (u0->length) - sizeof (udp_header_t);
 265           copy_ip6_address (&r1->peer_addr, &ip0->src_address);
 266
 267           r1->msg_type = DHCPV6_MSG_RELAY_FORW;
 268           fwd_opt->length = clib_host_to_net_u16 (len);
 269           fwd_opt->option = clib_host_to_net_u16 (DHCPV6_OPTION_RELAY_MSG);
 270
 271           r1->hop_count++;
 272           r1->hop_count =
 273             (h0->msg_type != DHCPV6_MSG_RELAY_FORW) ? 0 : r1->hop_count;
 274
 275           if (PREDICT_FALSE (r1->hop_count >= HOP_COUNT_LIMIT))
 276             {
 277               error0 = DHCPV6_RELAY_PKT_DROP_MAX_HOPS;
 278               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 279               pkts_no_exceeding_max_hop++;
 280               goto do_trace;
 281             }
 282
 283
 284           /* If relay-fwd and src address is site or global unicast address  */
 285           if (h0->msg_type == DHCPV6_MSG_RELAY_FORW &&
 286               ((ip0->src_address.as_u8[0] & 0xe0) == 0x20 ||
 287                (ip0->src_address.as_u8[0] & 0xfe) == 0xfc))
 288             {
 289               /* Set link address to zero */
 290               r1->link_addr.as_u64[0] = 0;
 291               r1->link_addr.as_u64[1] = 0;
 292               goto link_address_set;
 293             }
 294
 295           /* if receiving interface is unnumbered, use receiving interface
 296            * IP address as link address, otherwise use the loopback interface
 297            * IP address as link address.
 298            */
 299
 300           swif = vnet_get_sw_interface (vnm, rx_sw_if_index);
 301           if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
 302             sw_if_index = swif->unnumbered_sw_if_index;
 303
 304           ia0 =
 305             ip6_interface_first_global_or_site_address (&ip6_main,
 306                                                         sw_if_index);
 307           if (ia0 == 0)
 308             {
 309               error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
 310               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 311               pkts_no_interface_address++;
 312               goto do_trace;
 313             }
 314
 315           copy_ip6_address (&r1->link_addr, ia0);
 316
 317         link_address_set:
 318           fl =
 319             vlib_buffer_get_free_list (vm,
 320                                        vlib_buffer_get_free_list_index (b0));
 321
 322           if ((b0->current_length + sizeof (*id1) + sizeof (*vss1) +
 323                sizeof (*cmac)) > fl->n_data_bytes)
 324             {
 325               error0 = DHCPV6_PROXY_ERROR_PKT_TOO_BIG;
 326               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 327               pkts_too_big++;
 328               goto do_trace;
 329             }
 330
 331           id1 = (dhcpv6_int_id_t *) (((uword) ip1) + b0->current_length);
 332           b0->current_length += (sizeof (*id1));
 333
 334           id1->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_INTERFACE_ID);
 335           id1->opt.length = clib_host_to_net_u16 (sizeof (rx_sw_if_index));
 336           id1->int_idx = clib_host_to_net_u32 (rx_sw_if_index);
 337
 338           u1->length = 0;
 339           if (h0->msg_type != DHCPV6_MSG_RELAY_FORW)
 340             {
 341               cmac =
 342                 (dhcpv6_client_mac_t *) (((uword) ip1) + b0->current_length);
 343               b0->current_length += (sizeof (*cmac));
 344               cmac->opt.length = clib_host_to_net_u16 (sizeof (*cmac) -
 345                                                        sizeof (cmac->opt));
 346               cmac->opt.option =
 347                 clib_host_to_net_u16
 348                 (DHCPV6_OPTION_CLIENT_LINK_LAYER_ADDRESS);
 349               cmac->link_type = clib_host_to_net_u16 (1);       /* ethernet */
 350               clib_memcpy (cmac->data, client_src_mac, 6);
 351               u1->length += sizeof (*cmac);
 352             }
 353
 354           vss = dhcp_get_vss_info (dpm, rx_fib_idx, FIB_PROTOCOL_IP6);
 355
 356           if (vss)
 357             {
 358               u16 id_len;       /* length of VPN ID */
 359               u16 type_len = sizeof (vss1->vss_type);
 360
 361               vss1 = (dhcpv6_vss_t *) (((uword) ip1) + b0->current_length);
 362               vss1->vss_type = vss->vss_type;
 363               if (vss->vss_type == VSS_TYPE_VPN_ID)
 364                 {
 365                   id_len = sizeof (vss->vpn_id);        /* vpn_id is 7 bytes */
 366                   memcpy (vss1->data, vss->vpn_id, id_len);
 367                 }
 368               else if (vss->vss_type == VSS_TYPE_ASCII)
 369                 {
 370                   id_len = vec_len (vss->vpn_ascii_id);
 371                   memcpy (vss1->data, vss->vpn_ascii_id, id_len);
 372                 }
 373               else              /* must be VSS_TYPE_DEFAULT, no VPN ID */
 374                 id_len = 0;
 375
 376               vss1->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_VSS);
 377               vss1->opt.length = clib_host_to_net_u16 (type_len + id_len);
 378               u1->length += type_len + id_len + sizeof (vss1->opt);
 379               b0->current_length += type_len + id_len + sizeof (vss1->opt);
 380             }
 381
 382           pkts_to_server++;
 383           u1->checksum = 0;
 384           u1->src_port = clib_host_to_net_u16 (UDP_DST_PORT_dhcpv6_to_client);
 385           u1->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_dhcpv6_to_server);
 386
 387           u1->length =
 388             clib_host_to_net_u16 (clib_net_to_host_u16 (fwd_opt->length) +
 389                                   sizeof (*r1) + sizeof (*fwd_opt) +
 390                                   sizeof (*u1) + sizeof (*id1) + u1->length);
 391
 392           memset (ip1, 0, sizeof (*ip1));
 393           ip1->ip_version_traffic_class_and_flow_label = 0x60;
 394           ip1->payload_length = u1->length;
 395           ip1->protocol = PROTO_UDP;
 396           ip1->hop_limit = HOP_COUNT_LIMIT;
 397           src = ((server->dhcp_server.ip6.as_u64[0] ||
 398                   server->dhcp_server.ip6.as_u64[1]) ?
 399                  &server->dhcp_server.ip6 : &all_dhcpv6_server_address);
 400           copy_ip6_address (&ip1->dst_address, src);
 401
 402
 403           ia0 = ip6_interface_first_global_or_site_address
 404             (&ip6_main, vnet_buffer (b0)->sw_if_index[VLIB_RX]);
 405
 406           src = (proxy->dhcp_src_address.ip6.as_u64[0] ||
 407                  proxy->dhcp_src_address.ip6.as_u64[1]) ?
 408             &proxy->dhcp_src_address.ip6 : ia0;
 409           if (ia0 == 0)
 410             {
 411               error0 = DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS;
 412               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 413               pkts_no_src_address++;
 414               goto do_trace;
 415             }
 416
 417           copy_ip6_address (&ip1->src_address, src);
 418
 419
 420           u1->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip1,
 421                                                             &bogus_length);
 422           ASSERT (bogus_length == 0);
 423
 424           next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP;
 425
 426           is_solicit = (DHCPV6_MSG_SOLICIT == h0->msg_type);
 427
 428           /*
 429            * If we have multiple servers configured and this is the
 430            * client's discover message, then send copies to each of
 431            * those servers
 432            */
 433           if (is_solicit && vec_len (proxy->dhcp_servers) > 1)
 434             {
 435               u32 ii;
 436
 437               for (ii = 1; ii < vec_len (proxy->dhcp_servers); ii++)
 438                 {
 439                   vlib_buffer_t *c0;
 440                   u32 ci0;
 441
 442                   c0 = vlib_buffer_copy (vm, b0);
 443                   ci0 = vlib_get_buffer_index (vm, c0);
 444                   server = &proxy->dhcp_servers[ii];
 445
 446                   ip0 = vlib_buffer_get_current (c0);
 447
 448                   src = ((server->dhcp_server.ip6.as_u64[0] ||
 449                           server->dhcp_server.ip6.as_u64[1]) ?
 450                          &server->dhcp_server.ip6 :
 451                          &all_dhcpv6_server_address);
 452                   copy_ip6_address (&ip1->dst_address, src);
 453
 454                   to_next[0] = ci0;
 455                   to_next += 1;
 456                   n_left_to_next -= 1;
 457
 458                   vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 459                                                    to_next, n_left_to_next,
 460                                                    ci0, next0);
 461
 462                   if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 463                     {
 464                       dhcpv6_proxy_trace_t *tr;
 465
 466                       tr = vlib_add_trace (vm, node, c0, sizeof (*tr));
 467                       tr->which = 0;    /* to server */
 468                       tr->error = error0;
 469                       tr->original_sw_if_index = rx_sw_if_index;
 470                       tr->sw_if_index = sw_if_index;
 471                       if (next0 == DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP)
 472                         copy_ip6_address ((ip6_address_t *) &
 473                                           tr->packet_data[0],
 474                                           &server->dhcp_server.ip6);
 475                     }
 476
 477                   if (PREDICT_FALSE (0 == n_left_to_next))
 478                     {
 479                       vlib_put_next_frame (vm, node, next_index,
 480                                            n_left_to_next);
 481                       vlib_get_next_frame (vm, node, next_index,
 482                                            to_next, n_left_to_next);
 483                     }
 484                 }
 485             }
 486
 487         do_trace:
 488           if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 489             {
 490               dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
 491                                                          b0, sizeof (*tr));
 492               tr->which = 0;    /* to server */
 493               tr->error = error0;
 494               tr->original_sw_if_index = rx_sw_if_index;
 495               tr->sw_if_index = sw_if_index;
 496               if (DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP == next0)
 497                 copy_ip6_address ((ip6_address_t *) & tr->packet_data[0],
 498                                   &server->dhcp_server.ip6);
 499             }
 500
 501         do_enqueue:
 502           to_next[0] = bi0;
 503           to_next += 1;
 504           n_left_to_next -= 1;
 505
 506           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 507                                            to_next, n_left_to_next,
 508                                            bi0, next0);
 509         }
 510
 511       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 512     }
 513
 514   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 515                                DHCPV6_PROXY_ERROR_RELAY_TO_CLIENT,
 516                                pkts_to_client);
 517   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 518                                DHCPV6_PROXY_ERROR_RELAY_TO_SERVER,
 519                                pkts_to_server);
 520   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 521                                DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS,
 522                                pkts_no_interface_address);
 523   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 524                                DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE,
 525                                pkts_wrong_msg_type);
 526   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 527                                DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS,
 528                                pkts_no_src_address);
 529   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 530                                DHCPV6_PROXY_ERROR_PKT_TOO_BIG, pkts_too_big);
 531   return from_frame->n_vectors;
 532 }
 533
 534 /* *INDENT-OFF* */
 535 VLIB_REGISTER_NODE (dhcpv6_proxy_to_server_node, static) = {
 536   .function = dhcpv6_proxy_to_server_input,
 537   .name = "dhcpv6-proxy-to-server",
 538   /* Takes a vector of packets. */
 539   .vector_size = sizeof (u32),
 540
 541   .n_errors = DHCPV6_PROXY_N_ERROR,
 542   .error_strings = dhcpv6_proxy_error_strings,
 543
 544   .n_next_nodes = DHCPV6_PROXY_TO_SERVER_INPUT_N_NEXT,
 545   .next_nodes = {
 546 #define _(s,n) [DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s] = n,
 547     foreach_dhcpv6_proxy_to_server_input_next
 548 #undef _
 549   },
 550
 551   .format_buffer = format_dhcpv6_proxy_header_with_length,
 552   .format_trace = format_dhcpv6_proxy_trace,
 553 #if 0
 554   .unformat_buffer = unformat_dhcpv6_proxy_header,
 555 #endif
 556 };
 557 /* *INDENT-ON* */
 558
 559 static uword
 560 dhcpv6_proxy_to_client_input (vlib_main_t * vm,
 561                               vlib_node_runtime_t * node,
 562                               vlib_frame_t * from_frame)
 563 {
 564
 565   u32 n_left_from, *from;
 566   ethernet_main_t *em = vnet_get_ethernet_main ();
 567   dhcp_proxy_main_t *dm = &dhcp_proxy_main;
 568   dhcp_proxy_t *proxy;
 569   dhcp_server_t *server;
 570   vnet_main_t *vnm = vnet_get_main ();
 571   int bogus_length;
 572
 573   from = vlib_frame_vector_args (from_frame);
 574   n_left_from = from_frame->n_vectors;
 575
 576   while (n_left_from > 0)
 577     {
 578       u32 bi0;
 579       vlib_buffer_t *b0;
 580       udp_header_t *u0, *u1 = 0;
 581       dhcpv6_relay_hdr_t *h0;
 582       ip6_header_t *ip1 = 0, *ip0;
 583       ip6_address_t _ia0, *ia0 = &_ia0;
 584       ip6_address_t client_address;
 585       ethernet_interface_t *ei0;
 586       ethernet_header_t *mac0;
 587       vnet_hw_interface_t *hi0;
 588       vlib_frame_t *f0;
 589       u32 *to_next0;
 590       u32 sw_if_index = ~0;
 591       u32 original_sw_if_index = ~0;
 592       vnet_sw_interface_t *si0;
 593       u32 error0 = (u32) ~ 0;
 594       vnet_sw_interface_t *swif;
 595       dhcpv6_option_t *r0 = 0, *o;
 596       u16 len = 0;
 597       u8 interface_opt_flag = 0;
 598       u8 relay_msg_opt_flag = 0;
 599       ip6_main_t *im = &ip6_main;
 600       u32 server_fib_idx, client_fib_idx;
 601
 602       bi0 = from[0];
 603       from += 1;
 604       n_left_from -= 1;
 605
 606       b0 = vlib_get_buffer (vm, bi0);
 607       h0 = vlib_buffer_get_current (b0);
 608
 609       if (DHCPV6_MSG_RELAY_REPL != h0->msg_type)
 610         {
 611           error0 = DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
 612
 613         drop_packet:
 614           vlib_node_increment_counter (vm, dhcpv6_proxy_to_client_node.index,
 615                                        error0, 1);
 616
 617           f0 = vlib_get_frame_to_node (vm, dm->error_drop_node_index);
 618           to_next0 = vlib_frame_vector_args (f0);
 619           to_next0[0] = bi0;
 620           f0->n_vectors = 1;
 621           vlib_put_frame_to_node (vm, dm->error_drop_node_index, f0);
 622           goto do_trace;
 623         }
 624       /* hop count seems not need to be checked */
 625       if (HOP_COUNT_LIMIT < h0->hop_count)
 626         {
 627           error0 = DHCPV6_RELAY_PKT_DROP_MAX_HOPS;
 628           goto drop_packet;
 629         }
 630       u0 = (void *) h0 - (sizeof (*u0));
 631       ip0 = (void *) u0 - (sizeof (*ip0));
 632
 633       vlib_buffer_advance (b0, sizeof (*h0));
 634       o = vlib_buffer_get_current (b0);
 635
 636       /* Parse through TLVs looking for option 18 (DHCPV6_OPTION_INTERFACE_ID)
 637          _and_ option 9 (DHCPV6_OPTION_RELAY_MSG) option which must be there.
 638          Currently assuming no other options need to be processed
 639          The interface-ID is the FIB number we need
 640          to track down the client-facing interface */
 641
 642       while ((u8 *) o < (b0->data + b0->current_data + b0->current_length))
 643         {
 644           if (DHCPV6_OPTION_INTERFACE_ID == clib_net_to_host_u16 (o->option))
 645             {
 646               interface_opt_flag = 1;
 647               if (clib_net_to_host_u16 (o->length) == sizeof (sw_if_index))
 648                 sw_if_index =
 649                   clib_net_to_host_u32 (((dhcpv6_int_id_t *) o)->int_idx);
 650               if (sw_if_index >= vec_len (im->fib_index_by_sw_if_index))
 651                 {
 652                   error0 = DHCPV6_PROXY_ERROR_WRONG_INTERFACE_ID_OPTION;
 653                   goto drop_packet;
 654                 }
 655             }
 656           if (DHCPV6_OPTION_RELAY_MSG == clib_net_to_host_u16 (o->option))
 657             {
 658               relay_msg_opt_flag = 1;
 659               r0 = vlib_buffer_get_current (b0);
 660             }
 661           if ((relay_msg_opt_flag == 1) && (interface_opt_flag == 1))
 662             break;
 663           vlib_buffer_advance (b0,
 664                                sizeof (*o) +
 665                                clib_net_to_host_u16 (o->length));
 666           o =
 667             (dhcpv6_option_t *) (((uword) o) +
 668                                  clib_net_to_host_u16 (o->length) +
 669                                  sizeof (*o));
 670         }
 671
 672       if ((relay_msg_opt_flag == 0) || (r0 == 0))
 673         {
 674           error0 = DHCPV6_PROXY_ERROR_NO_RELAY_MESSAGE_OPTION;
 675           goto drop_packet;
 676         }
 677
 678       if ((u32) ~ 0 == sw_if_index)
 679         {
 680           error0 = DHCPV6_PROXY_ERROR_NO_CIRCUIT_ID_OPTION;
 681           goto drop_packet;
 682         }
 683
 684       //Advance buffer to start of encapsulated DHCPv6 message
 685       vlib_buffer_advance (b0, sizeof (*r0));
 686
 687       client_fib_idx = im->mfib_index_by_sw_if_index[sw_if_index];
 688       proxy = dhcp_get_proxy (dm, client_fib_idx, FIB_PROTOCOL_IP6);
 689
 690       if (NULL == proxy)
 691         {
 692           error0 = DHCPV6_PROXY_ERROR_NO_SERVER;
 693           goto drop_packet;
 694         }
 695
 696       server_fib_idx = im->fib_index_by_sw_if_index
 697         [vnet_buffer (b0)->sw_if_index[VLIB_RX]];
 698
 699       vec_foreach (server, proxy->dhcp_servers)
 700       {
 701         if (server_fib_idx == server->server_fib_index &&
 702             ip0->src_address.as_u64[0] == server->dhcp_server.ip6.as_u64[0] &&
 703             ip0->src_address.as_u64[1] == server->dhcp_server.ip6.as_u64[1])
 704           {
 705             goto server_found;
 706           }
 707       }
 708
 709       //drop packet if not from server with configured address or FIB
 710       error0 = DHCPV6_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS;
 711       goto drop_packet;
 712
 713     server_found:
 714       vnet_buffer (b0)->sw_if_index[VLIB_TX] = original_sw_if_index
 715         = sw_if_index;
 716
 717       swif = vnet_get_sw_interface (vnm, original_sw_if_index);
 718       if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
 719         sw_if_index = swif->unnumbered_sw_if_index;
 720
 721
 722       /*
 723        * udp_local hands us the DHCPV6 header, need udp hdr,
 724        * ip hdr to relay to client
 725        */
 726       vlib_buffer_advance (b0, -(sizeof (*u1)));
 727       u1 = vlib_buffer_get_current (b0);
 728
 729       vlib_buffer_advance (b0, -(sizeof (*ip1)));
 730       ip1 = vlib_buffer_get_current (b0);
 731
 732       copy_ip6_address (&client_address, &h0->peer_addr);
 733
 734       ia0 = ip6_interface_first_address (&ip6_main, sw_if_index);
 735       if (ia0 == 0)
 736         {
 737           error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
 738           goto drop_packet;
 739         }
 740
 741       len = clib_net_to_host_u16 (r0->length);
 742       memset (ip1, 0, sizeof (*ip1));
 743       copy_ip6_address (&ip1->dst_address, &client_address);
 744       u1->checksum = 0;
 745       u1->src_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_server);
 746       u1->dst_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_client);
 747       u1->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
 748
 749       ip1->ip_version_traffic_class_and_flow_label =
 750         ip0->ip_version_traffic_class_and_flow_label & 0x00000fff;
 751       ip1->payload_length = u1->length;
 752       ip1->protocol = PROTO_UDP;
 753       ip1->hop_limit = HOP_COUNT_LIMIT;
 754       copy_ip6_address (&ip1->src_address, ia0);
 755
 756       u1->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip1,
 757                                                         &bogus_length);
 758       ASSERT (bogus_length == 0);
 759
 760       vlib_buffer_advance (b0, -(sizeof (ethernet_header_t)));
 761       si0 = vnet_get_sw_interface (vnm, original_sw_if_index);
 762       if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
 763         vlib_buffer_advance (b0, -4 /* space for VLAN tag */ );
 764
 765       mac0 = vlib_buffer_get_current (b0);
 766
 767       hi0 = vnet_get_sup_hw_interface (vnm, original_sw_if_index);
 768       ei0 = pool_elt_at_index (em->interfaces, hi0->hw_instance);
 769       clib_memcpy (mac0->src_address, ei0->address, sizeof (ei0->address));
 770       memset (&mac0->dst_address, 0xff, sizeof (mac0->dst_address));
 771       mac0->type = (si0->type == VNET_SW_INTERFACE_TYPE_SUB) ?
 772         clib_net_to_host_u16 (0x8100) : clib_net_to_host_u16 (0x86dd);
 773
 774       if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
 775         {
 776           u32 *vlan_tag = (u32 *) (mac0 + 1);
 777           u32 tmp;
 778           tmp = (si0->sub.id << 16) | 0x0800;
 779           *vlan_tag = clib_host_to_net_u32 (tmp);
 780         }
 781
 782       /* $$$ consider adding a dynamic next to the graph node, for performance */
 783       f0 = vlib_get_frame_to_node (vm, hi0->output_node_index);
 784       to_next0 = vlib_frame_vector_args (f0);
 785       to_next0[0] = bi0;
 786       f0->n_vectors = 1;
 787       vlib_put_frame_to_node (vm, hi0->output_node_index, f0);
 788
 789     do_trace:
 790       if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 791         {
 792           dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
 793                                                      b0, sizeof (*tr));
 794           tr->which = 1;        /* to client */
 795           if (ia0)
 796             copy_ip6_address ((ip6_address_t *) tr->packet_data, ia0);
 797           tr->error = error0;
 798           tr->original_sw_if_index = original_sw_if_index;
 799           tr->sw_if_index = sw_if_index;
 800         }
 801     }
 802   return from_frame->n_vectors;
 803
 804 }
 805
 806 /* *INDENT-OFF* */
 807 VLIB_REGISTER_NODE (dhcpv6_proxy_to_client_node, static) = {
 808   .function = dhcpv6_proxy_to_client_input,
 809   .name = "dhcpv6-proxy-to-client",
 810   /* Takes a vector of packets. */
 811   .vector_size = sizeof (u32),
 812
 813   .n_errors = DHCPV6_PROXY_N_ERROR,
 814   .error_strings = dhcpv6_proxy_error_strings,
 815   .format_buffer = format_dhcpv6_proxy_header_with_length,
 816   .format_trace = format_dhcpv6_proxy_trace,
 817 #if 0
 818   .unformat_buffer = unformat_dhcpv6_proxy_header,
 819 #endif
 820 };
 821 /* *INDENT-ON* */
 822
 823 static clib_error_t *
 824 dhcp6_proxy_init (vlib_main_t * vm)
 825 {
 826   dhcp_proxy_main_t *dm = &dhcp_proxy_main;
 827   vlib_node_t *error_drop_node;
 828
 829   error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
 830   dm->error_drop_node_index = error_drop_node->index;
 831
 832   /* RFC says this is the dhcpv6 server address  */
 833   all_dhcpv6_server_address.as_u64[0] =
 834     clib_host_to_net_u64 (0xFF05000000000000);
 835   all_dhcpv6_server_address.as_u64[1] = clib_host_to_net_u64 (0x00010003);
 836
 837   /* RFC says this is the server and agent address */
 838   all_dhcpv6_server_relay_agent_address.as_u64[0] =
 839     clib_host_to_net_u64 (0xFF02000000000000);
 840   all_dhcpv6_server_relay_agent_address.as_u64[1] =
 841     clib_host_to_net_u64 (0x00010002);
 842
 843   return 0;
 844 }
 845
 846 VLIB_INIT_FUNCTION (dhcp6_proxy_init);
 847
 848 int
 849 dhcp6_proxy_set_server (ip46_address_t * addr,
 850                         ip46_address_t * src_addr,
 851                         u32 rx_table_id, u32 server_table_id, int is_del)
 852 {
 853   vlib_main_t *vm = vlib_get_main ();
 854   u32 rx_fib_index = 0;
 855   int rc = 0;
 856
 857   const mfib_prefix_t all_dhcp_servers = {
 858     .fp_len = 128,
 859     .fp_proto = FIB_PROTOCOL_IP6,
 860     .fp_grp_addr = {
 861                     .ip6 = all_dhcpv6_server_relay_agent_address,
 862                     }
 863   };
 864
 865   if (ip46_address_is_zero (addr))
 866     return VNET_API_ERROR_INVALID_DST_ADDRESS;
 867
 868   if (ip46_address_is_zero (src_addr))
 869     return VNET_API_ERROR_INVALID_SRC_ADDRESS;
 870
 871   rx_fib_index = mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
 872                                                      rx_table_id,
 873                                                      MFIB_SOURCE_DHCP);
 874
 875   if (is_del)
 876     {
 877       if (dhcp_proxy_server_del (FIB_PROTOCOL_IP6, rx_fib_index,
 878                                  addr, server_table_id))
 879         {
 880           mfib_table_entry_delete (rx_fib_index,
 881                                    &all_dhcp_servers, MFIB_SOURCE_DHCP);
 882           mfib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP6,
 883                              MFIB_SOURCE_DHCP);
 884
 885           udp_unregister_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
 886                                    0 /* is_ip6 */ );
 887           udp_unregister_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
 888                                    0 /* is_ip6 */ );
 889         }
 890     }
 891   else
 892     {
 893       const fib_route_path_t path_for_us = {
 894         .frp_proto = DPO_PROTO_IP6,
 895         .frp_addr = zero_addr,
 896         .frp_sw_if_index = 0xffffffff,
 897         .frp_fib_index = ~0,
 898         .frp_weight = 0,
 899         .frp_flags = FIB_ROUTE_PATH_LOCAL,
 900       };
 901       if (dhcp_proxy_server_add (FIB_PROTOCOL_IP6, addr, src_addr,
 902                                  rx_fib_index, server_table_id))
 903         {
 904           mfib_table_entry_path_update (rx_fib_index,
 905                                         &all_dhcp_servers,
 906                                         MFIB_SOURCE_DHCP,
 907                                         &path_for_us, MFIB_ITF_FLAG_FORWARD);
 908           /*
 909            * Each interface that is enabled in this table, needs to be added
 910            * as an accepting interface, but this is not easily doable in VPP.
 911            * So we cheat. Add a flag to the entry that indicates accept form
 912            * any interface.
 913            * We will still only accept on v6 enabled interfaces, since the
 914            * input feature ensures this.
 915            */
 916           mfib_table_entry_update (rx_fib_index,
 917                                    &all_dhcp_servers,
 918                                    MFIB_SOURCE_DHCP,
 919                                    MFIB_RPF_ID_NONE,
 920                                    MFIB_ENTRY_FLAG_ACCEPT_ALL_ITF);
 921           mfib_table_lock (rx_fib_index, FIB_PROTOCOL_IP6, MFIB_SOURCE_DHCP);
 922
 923           udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
 924                                  dhcpv6_proxy_to_client_node.index,
 925                                  0 /* is_ip6 */ );
 926           udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
 927                                  dhcpv6_proxy_to_server_node.index,
 928                                  0 /* is_ip6 */ );
 929         }
 930     }
 931
 932   mfib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP6, MFIB_SOURCE_DHCP);
 933
 934   return (rc);
 935 }
 936
 937 static clib_error_t *
 938 dhcpv6_proxy_set_command_fn (vlib_main_t * vm,
 939                              unformat_input_t * input,
 940                              vlib_cli_command_t * cmd)
 941 {
 942   ip46_address_t addr, src_addr;
 943   int set_server = 0, set_src_address = 0;
 944   u32 rx_table_id = 0, server_table_id = 0;
 945   int is_del = 0;
 946
 947   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 948     {
 949       if (unformat (input, "server %U", unformat_ip6_address, &addr.ip6))
 950         set_server = 1;
 951       else if (unformat (input, "src-address %U",
 952                          unformat_ip6_address, &src_addr.ip6))
 953         set_src_address = 1;
 954       else if (unformat (input, "server-fib-id %d", &server_table_id))
 955         ;
 956       else if (unformat (input, "rx-fib-id %d", &rx_table_id))
 957         ;
 958       else if (unformat (input, "delete") || unformat (input, "del"))
 959         is_del = 1;
 960       else
 961         break;
 962     }
 963
 964   if (is_del || (set_server && set_src_address))
 965     {
 966       int rv;
 967
 968       rv = dhcp6_proxy_set_server (&addr, &src_addr, rx_table_id,
 969                                    server_table_id, is_del);
 970
 971       //TODO: Complete the errors
 972       switch (rv)
 973         {
 974         case 0:
 975           return 0;
 976
 977         case VNET_API_ERROR_INVALID_DST_ADDRESS:
 978           return clib_error_return (0, "Invalid server address");
 979
 980         case VNET_API_ERROR_INVALID_SRC_ADDRESS:
 981           return clib_error_return (0, "Invalid src address");
 982
 983         case VNET_API_ERROR_NO_SUCH_ENTRY:
 984           return clib_error_return
 985             (0, "Fib id %d: no per-fib DHCP server configured", rx_table_id);
 986
 987         default:
 988           return clib_error_return (0, "BUG: rv %d", rv);
 989         }
 990     }
 991   else
 992     return clib_error_return (0, "parse error`%U'",
 993                               format_unformat_error, input);
 994 }
 995
 996 /* *INDENT-OFF* */
 997 VLIB_CLI_COMMAND (dhcpv6_proxy_set_command, static) = {
 998   .path = "set dhcpv6 proxy",
 999   .short_help = "set dhcpv6 proxy [del] server <ipv6-addr> src-address <ipv6-addr> "
1000                   "[server-fib-id <fib-id>] [rx-fib-id <fib-id>] ",
1001   .function = dhcpv6_proxy_set_command_fn,
1002 };
1003 /* *INDENT-ON* */
1004
1005 static u8 *
1006 format_dhcp6_proxy_server (u8 * s, va_list * args)
1007 {
1008   dhcp_proxy_t *proxy = va_arg (*args, dhcp_proxy_t *);
1009   fib_table_t *server_fib;
1010   dhcp_server_t *server;
1011   ip6_mfib_t *rx_fib;
1012
1013   if (proxy == 0)
1014     {
1015       s = format (s, "%=14s%=16s%s", "RX FIB", "Src Address",
1016                   "Servers FIB,Address");
1017       return s;
1018     }
1019
1020   rx_fib = ip6_mfib_get (proxy->rx_fib_index);
1021
1022   s = format (s, "%=14u%=16U",
1023               rx_fib->table_id,
1024               format_ip46_address, &proxy->dhcp_src_address, IP46_TYPE_ANY);
1025
1026   vec_foreach (server, proxy->dhcp_servers)
1027   {
1028     server_fib = fib_table_get (server->server_fib_index, FIB_PROTOCOL_IP6);
1029     s = format (s, "%u,%U  ",
1030                 server_fib->ft_table_id,
1031                 format_ip46_address, &server->dhcp_server, IP46_TYPE_ANY);
1032   }
1033
1034   return s;
1035 }
1036
1037 static int
1038 dhcp6_proxy_show_walk (dhcp_proxy_t * proxy, void *ctx)
1039 {
1040   vlib_main_t *vm = ctx;
1041
1042   vlib_cli_output (vm, "%U", format_dhcp6_proxy_server, proxy);
1043
1044   return (1);
1045 }
1046
1047 static clib_error_t *
1048 dhcpv6_proxy_show_command_fn (vlib_main_t * vm,
1049                               unformat_input_t * input,
1050                               vlib_cli_command_t * cmd)
1051 {
1052   vlib_cli_output (vm, "%U", format_dhcp6_proxy_server,
1053                    NULL /* header line */ );
1054
1055   dhcp_proxy_walk (FIB_PROTOCOL_IP6, dhcp6_proxy_show_walk, vm);
1056
1057   return (NULL);
1058 }
1059
1060 /* *INDENT-OFF* */
1061 VLIB_CLI_COMMAND (dhcpv6_proxy_show_command, static) = {
1062   .path = "show dhcpv6 proxy",
1063   .short_help = "Display dhcpv6 proxy info",
1064   .function = dhcpv6_proxy_show_command_fn,
1065 };
1066 /* *INDENT-ON* */
1067
1068 static clib_error_t *
1069 dhcpv6_vss_command_fn (vlib_main_t * vm,
1070                        unformat_input_t * input, vlib_cli_command_t * cmd)
1071 {
1072   u8 is_del = 0, vss_type = VSS_TYPE_DEFAULT;
1073   u8 *vpn_ascii_id = 0;
1074   u32 oui = 0, fib_id = 0, tbl_id = ~0;
1075
1076   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1077     {
1078       if (unformat (input, "table %d", &tbl_id))
1079         ;
1080       else if (unformat (input, "oui %d", &oui))
1081         vss_type = VSS_TYPE_VPN_ID;
1082       else if (unformat (input, "vpn-id %d", &fib_id))
1083         vss_type = VSS_TYPE_VPN_ID;
1084       else if (unformat (input, "vpn-ascii-id %s", &vpn_ascii_id))
1085         vss_type = VSS_TYPE_ASCII;
1086       else if (unformat (input, "delete") || unformat (input, "del"))
1087         is_del = 1;
1088       else
1089         break;
1090     }
1091
1092   if (tbl_id == ~0)
1093     return clib_error_return (0, "no table ID specified.");
1094
1095   int rv = dhcp_proxy_set_vss (FIB_PROTOCOL_IP6, tbl_id, vss_type,
1096                                vpn_ascii_id, oui, fib_id, is_del);
1097   switch (rv)
1098     {
1099     case 0:
1100       return 0;
1101     case VNET_API_ERROR_NO_SUCH_ENTRY:
1102       return clib_error_return (0, "vss for table %d not found in pool.",
1103                                 tbl_id);
1104     default:
1105       return clib_error_return (0, "BUG: rv %d", rv);
1106     }
1107 }
1108
1109 /* *INDENT-OFF* */
1110 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_command, static) = {
1111   .path = "set dhcpv6 vss",
1112   .short_help = "set dhcpv6 vss table <table-id> [oui <n> vpn-id <n> | vpn-ascii-id <text>]",
1113   .function = dhcpv6_vss_command_fn,
1114 };
1115 /* *INDENT-ON* */
1116
1117 static clib_error_t *
1118 dhcpv6_vss_show_command_fn (vlib_main_t * vm,
1119                             unformat_input_t * input,
1120                             vlib_cli_command_t * cmd)
1121 {
1122   dhcp_vss_walk (FIB_PROTOCOL_IP6, dhcp_vss_show_walk, vm);
1123
1124   return (NULL);
1125 }
1126
1127 /* *INDENT-OFF* */
1128 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_show_command, static) = {
1129   .path = "show dhcpv6 vss",
1130   .short_help = "show dhcpv6 VSS",
1131   .function = dhcpv6_vss_show_command_fn,
1132 };
1133 /* *INDENT-ON* */
1134
1135 static clib_error_t *
1136 dhcpv6_link_address_show_command_fn (vlib_main_t * vm,
1137                                      unformat_input_t * input,
1138                                      vlib_cli_command_t * cmd)
1139 {
1140   vnet_main_t *vnm = vnet_get_main ();
1141   u32 sw_if_index0 = 0, sw_if_index;
1142   vnet_sw_interface_t *swif;
1143   ip6_address_t *ia0;
1144
1145   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1146     {
1147
1148       if (unformat (input, "%U",
1149                     unformat_vnet_sw_interface, vnm, &sw_if_index0))
1150         {
1151           swif = vnet_get_sw_interface (vnm, sw_if_index0);
1152           sw_if_index = (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) ?
1153             swif->unnumbered_sw_if_index : sw_if_index0;
1154           ia0 = ip6_interface_first_address (&ip6_main, sw_if_index);
1155           if (ia0)
1156             {
1157               vlib_cli_output (vm, "%=20s%=48s", "interface", "link-address");
1158
1159               vlib_cli_output (vm, "%=20U%=48U",
1160                                format_vnet_sw_if_index_name, vnm,
1161                                sw_if_index0, format_ip6_address, ia0);
1162             }
1163           else
1164             vlib_cli_output (vm, "%=34s%=20U",
1165                              "No IPv6 address configured on",
1166                              format_vnet_sw_if_index_name, vnm, sw_if_index);
1167         }
1168       else
1169         break;
1170     }
1171
1172   return 0;
1173 }
1174
1175 /* *INDENT-OFF* */
1176 VLIB_CLI_COMMAND (dhcpv6_proxy_address_show_command, static) = {
1177   .path = "show dhcpv6 link-address interface",
1178   .short_help = "show dhcpv6 link-address interface <interface>",
1179   .function = dhcpv6_link_address_show_command_fn,
1180 };
1181 /* *INDENT-ON* */
1182
1183 /*
1184  * fd.io coding-style-patch-verification: ON
1185  *
1186  * Local Variables:
1187  * eval: (c-set-style "gnu")
1188  * End:
1189  */