src/vnet/dhcpv6/proxy_node.c

   1 /*
   2  * 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/dhcpv6/proxy.h>
  21 #include <vnet/fib/ip6_fib.h>
  22
  23 static char * dhcpv6_proxy_error_strings[] = {
  24 #define dhcpv6_proxy_error(n,s) s,
  25 #include "proxy_error.def"
  26 #undef dhcpv6_proxy_error
  27 };
  28
  29 #define foreach_dhcpv6_proxy_to_server_input_next \
  30   _ (DROP, "error-drop")                        \
  31   _ (LOOKUP, "ip6-lookup")                      \
  32   _ (SEND_TO_CLIENT, "dhcpv6-proxy-to-client")
  33
  34
  35 typedef enum {
  36 #define _(s,n) DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s,
  37   foreach_dhcpv6_proxy_to_server_input_next
  38 #undef _
  39   DHCPV6_PROXY_TO_SERVER_INPUT_N_NEXT,
  40 } dhcpv6_proxy_to_server_input_next_t;
  41
  42 typedef struct {
  43   /* 0 => to server, 1 => to client */
  44   int which;
  45   u8 packet_data[64];
  46   u32 error;
  47   u32 sw_if_index;
  48   u32 original_sw_if_index;
  49 } dhcpv6_proxy_trace_t;
  50
  51 vlib_node_registration_t dhcpv6_proxy_to_server_node;
  52 vlib_node_registration_t dhcpv6_proxy_to_client_node;
  53
  54
  55 u8 * format_dhcpv6_proxy_trace (u8 * s, va_list * args)
  56 {
  57   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  58   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  59   dhcpv6_proxy_trace_t * t = va_arg (*args, dhcpv6_proxy_trace_t *);
  60
  61   if (t->which == 0)
  62     s = format (s, "DHCPV6 proxy: sent to server %U",
  63                 format_ip6_address, &t->packet_data, sizeof (ip6_address_t));
  64   else
  65     s = format (s, "DHCPV6 proxy: sent to client from %U",
  66                 format_ip6_address, &t->packet_data, sizeof (ip6_address_t));
  67   if (t->error != (u32)~0)
  68     s = format (s, " error: %s\n", dhcpv6_proxy_error_strings[t->error]);
  69
  70   s = format (s, "  original_sw_if_index: %d, sw_if_index: %d\n",
  71               t->original_sw_if_index, t->sw_if_index);
  72
  73   return s;
  74 }
  75
  76 u8 * format_dhcpv6_proxy_header_with_length (u8 * s, va_list * args)
  77 {
  78   dhcpv6_header_t * h = va_arg (*args, dhcpv6_header_t *);
  79   u32 max_header_bytes = va_arg (*args, u32);
  80   u32 header_bytes;
  81
  82   header_bytes = sizeof (h[0]);
  83   if (max_header_bytes != 0 && header_bytes > max_header_bytes)
  84     return format (s, "dhcpv6 header truncated");
  85
  86   s = format (s, "DHCPV6 Proxy");
  87
  88   return s;
  89 }
  90 /* get first interface address */
  91 static ip6_address_t *
  92 ip6_interface_first_global_or_site_address (ip6_main_t * im, u32 sw_if_index)
  93 {
  94   ip_lookup_main_t * lm = &im->lookup_main;
  95   ip_interface_address_t * ia = 0;
  96   ip6_address_t * result = 0;
  97
  98   foreach_ip_interface_address (lm, ia, sw_if_index,
  99                                 1 /* honor unnumbered */,
 100   ({
 101     ip6_address_t * a = ip_interface_address_get_address (lm, ia);
 102     if ((a->as_u8[0] & 0xe0) == 0x20 ||
 103         (a->as_u8[0] & 0xfe) == 0xfc)  {
 104         result = a;
 105         break;
 106     }
 107   }));
 108   return result;
 109 }
 110
 111 /* get first interface address */
 112 static ip6_address_t *
 113 ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
 114 {
 115   ip_lookup_main_t * lm = &im->lookup_main;
 116   ip_interface_address_t * ia = 0;
 117   ip6_address_t * result = 0;
 118
 119   foreach_ip_interface_address (lm, ia, sw_if_index,
 120                                 1 /* honor unnumbered */,
 121   ({
 122     ip6_address_t * a = ip_interface_address_get_address (lm, ia);
 123     result = a;
 124     break;
 125   }));
 126   return result;
 127 }
 128
 129 static inline void copy_ip6_address (ip6_address_t *dst, ip6_address_t *src)
 130 {
 131
 132   dst->as_u64[0] = src->as_u64[0];
 133   dst->as_u64[1] = src->as_u64[1];
 134 }
 135
 136 static uword
 137 dhcpv6_proxy_to_server_input (vlib_main_t * vm,
 138                             vlib_node_runtime_t * node,
 139                             vlib_frame_t * from_frame)
 140 {
 141   u32 n_left_from, next_index, * from, * to_next;
 142   dhcpv6_proxy_main_t * dpm = &dhcpv6_proxy_main;
 143   from = vlib_frame_vector_args (from_frame);
 144   n_left_from = from_frame->n_vectors;
 145   u32 pkts_to_server=0, pkts_to_client=0, pkts_no_server=0;
 146   u32 pkts_no_interface_address=0, pkts_no_exceeding_max_hop=0;
 147   u32 pkts_no_src_address=0;
 148   u32 pkts_wrong_msg_type=0;
 149   u32 pkts_too_big=0;
 150   ip6_main_t * im = &ip6_main;
 151   ip6_fib_t * fib;
 152   ip6_address_t * src;
 153   int bogus_length;
 154   dhcpv6_server_t * server;
 155   u32  rx_fib_idx = 0, server_fib_idx = 0;
 156   u32 server_idx;
 157   u32 fib_id1 = 0;
 158
 159   next_index = node->cached_next_index;
 160
 161   while (n_left_from > 0)
 162     {
 163       u32 n_left_to_next;
 164
 165       vlib_get_next_frame (vm, node, next_index,
 166                            to_next, n_left_to_next);
 167
 168       while (n_left_from > 0 && n_left_to_next > 0)
 169         {
 170           vnet_main_t *vnm = vnet_get_main();
 171           u32 sw_if_index = 0;
 172           u32 rx_sw_if_index = 0;
 173           vnet_sw_interface_t *swif;
 174           u32 bi0;
 175           vlib_buffer_t * b0;
 176           udp_header_t * u0, *u1;
 177           dhcpv6_header_t * h0;  // client msg hdr
 178           ip6_header_t * ip0, *ip1;
 179           ip6_address_t _ia0, *ia0=&_ia0;
 180           u32 next0;
 181           u32 error0 = (u32) ~0;
 182           dhcpv6_option_t *fwd_opt;
 183           dhcpv6_relay_hdr_t *r1;
 184           u16 len;
 185           dhcpv6_int_id_t *id1;
 186           dhcpv6_vss_t *vss1;
 187           dhcpv6_client_mac_t *cmac; // client mac
 188           ethernet_header_t * e_h0;
 189           u8 client_src_mac[6];
 190           vlib_buffer_free_list_t *fl;
 191
 192           uword *p_vss;
 193           u32  oui1=0;
 194           dhcpv6_vss_info *vss;
 195
 196
 197           bi0 = from[0];
 198           to_next[0] = bi0;
 199           from += 1;
 200           to_next += 1;
 201           n_left_from -= 1;
 202           n_left_to_next -= 1;
 203
 204           b0 = vlib_get_buffer (vm, bi0);
 205
 206           h0 = vlib_buffer_get_current (b0);
 207
 208           /*
 209            * udp_local hands us the DHCPV6 header.
 210            */
 211           u0 = (void *)h0 -(sizeof(*u0));
 212           ip0 = (void *)u0 -(sizeof(*ip0));
 213           e_h0 = (void *)ip0 - ethernet_buffer_header_size(b0);
 214
 215           clib_memcpy(client_src_mac, e_h0->src_address, 6);
 216
 217           switch (h0->u.msg_type) {
 218             case DHCPV6_MSG_SOLICIT:
 219             case DHCPV6_MSG_REQUEST:
 220             case DHCPV6_MSG_CONFIRM:
 221             case DHCPV6_MSG_RENEW:
 222             case DHCPV6_MSG_REBIND:
 223             case DHCPV6_MSG_RELEASE:
 224             case DHCPV6_MSG_DECLINE:
 225             case DHCPV6_MSG_INFORMATION_REQUEST:
 226             case DHCPV6_MSG_RELAY_FORW:
 227                 /* send to server */
 228                 break;
 229             case DHCPV6_MSG_RELAY_REPL:
 230                 /* send to client */
 231                 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_SEND_TO_CLIENT;
 232                 error0 = 0;
 233                 pkts_to_client++;
 234                 goto do_enqueue;
 235             default:
 236                 /* drop the packet */
 237                 pkts_wrong_msg_type++;
 238                 error0 = DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
 239                 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 240                 goto do_trace;
 241
 242           }
 243
 244           /* Send to DHCPV6 server via the configured FIB */
 245           rx_sw_if_index = sw_if_index =  vnet_buffer(b0)->sw_if_index[VLIB_RX];
 246           rx_fib_idx = im->fib_index_by_sw_if_index [rx_sw_if_index];
 247
 248           if (vec_len(dpm->dhcp6_server_index_by_rx_fib_index) <= rx_fib_idx)
 249             goto no_server;
 250
 251           server_idx = dpm->dhcp6_server_index_by_rx_fib_index[rx_fib_idx];
 252
 253           if (PREDICT_FALSE (pool_is_free_index (dpm->dhcp6_servers,
 254                                                           server_idx)))
 255                      {
 256                      no_server:
 257                        error0 = DHCPV6_PROXY_ERROR_NO_SERVER;
 258                        next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 259                        pkts_no_server++;
 260                        goto do_trace;
 261                      }
 262
 263           server = pool_elt_at_index(dpm->dhcp6_servers, server_idx);
 264           if (server->valid == 0)
 265             goto no_server;
 266
 267           server_fib_idx = server->server_fib6_index;
 268           vnet_buffer(b0)->sw_if_index[VLIB_TX] = server_fib_idx;
 269
 270
 271           /* relay-option header pointer */
 272           vlib_buffer_advance(b0, -(sizeof(*fwd_opt)));
 273           fwd_opt = vlib_buffer_get_current(b0);
 274           /* relay message header pointer */
 275           vlib_buffer_advance(b0, -(sizeof(*r1)));
 276           r1 = vlib_buffer_get_current(b0);
 277
 278           vlib_buffer_advance(b0, -(sizeof(*u1)));
 279           u1 = vlib_buffer_get_current(b0);
 280
 281           vlib_buffer_advance(b0, -(sizeof(*ip1)));
 282           ip1 = vlib_buffer_get_current(b0);
 283
 284           /* fill in all that rubbish... */
 285           len = clib_net_to_host_u16(u0->length) - sizeof(udp_header_t);
 286           copy_ip6_address(&r1->peer_addr, &ip0->src_address);
 287
 288           r1->msg_type = DHCPV6_MSG_RELAY_FORW;
 289           fwd_opt->length = clib_host_to_net_u16(len);
 290           fwd_opt->option = clib_host_to_net_u16(DHCPV6_OPTION_RELAY_MSG);
 291
 292           r1->hop_count++;
 293           r1->hop_count = (h0->u.msg_type != DHCPV6_MSG_RELAY_FORW) ? 0 : r1->hop_count;
 294
 295           if (PREDICT_FALSE(r1->hop_count >= HOP_COUNT_LIMIT))
 296             {
 297               error0 =  DHCPV6_RELAY_PKT_DROP_MAX_HOPS;
 298               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 299               pkts_no_exceeding_max_hop++;
 300               goto do_trace;
 301             }
 302
 303
 304           /* If relay-fwd and src address is site or global unicast address  */
 305           if (h0->u.msg_type == DHCPV6_MSG_RELAY_FORW &&
 306               ((ip0->src_address.as_u8[0] & 0xe0) == 0x20 ||
 307                (ip0->src_address.as_u8[0] & 0xfe) == 0xfc))
 308             {
 309               /* Set link address to zero */
 310               r1->link_addr.as_u64[0] = 0;
 311               r1->link_addr.as_u64[1] = 0;
 312               goto link_address_set;
 313             }
 314
 315           /* if receiving interface is unnumbered, use receiving interface
 316            * IP address as link address, otherwise use the loopback interface
 317            * IP address as link address.
 318            */
 319
 320           swif = vnet_get_sw_interface (vnm, rx_sw_if_index);
 321           if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
 322               sw_if_index = swif->unnumbered_sw_if_index;
 323
 324           ia0 = ip6_interface_first_global_or_site_address(&ip6_main, sw_if_index);
 325           if (ia0 == 0)
 326             {
 327               error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
 328               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 329               pkts_no_interface_address++;
 330               goto do_trace;
 331             }
 332
 333           copy_ip6_address(&r1->link_addr, ia0);
 334
 335         link_address_set:
 336           fl = vlib_buffer_get_free_list (vm, b0->free_list_index);
 337
 338           if ((b0->current_length+sizeof(*id1)+sizeof(*vss1)+sizeof(*cmac))
 339               > fl->n_data_bytes)
 340             {
 341               error0 = DHCPV6_PROXY_ERROR_PKT_TOO_BIG;
 342               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 343               pkts_too_big++;
 344               goto do_trace;
 345             }
 346
 347           id1 = (dhcpv6_int_id_t *) (((uword) ip1) + b0->current_length);
 348           b0->current_length += (sizeof (*id1));
 349
 350
 351           fib = ip6_fib_get (rx_fib_idx);
 352
 353           //TODO: Revisit if hash makes sense here
 354           p_vss = hash_get (dpm->vss_index_by_vrf_id,
 355                             fib->table_id);
 356           if (p_vss)
 357             {
 358               vss = pool_elt_at_index (dpm->vss, p_vss[0]);
 359               oui1 =  vss->vpn_id.oui;
 360               fib_id1 =  vss->vpn_id.fib_id;
 361             }
 362
 363           id1->opt.option = clib_host_to_net_u16(DHCPV6_OPTION_INTERFACE_ID);
 364           id1->opt.length = clib_host_to_net_u16(sizeof(rx_sw_if_index));
 365           id1->int_idx = clib_host_to_net_u32(rx_sw_if_index);
 366
 367           u1->length =0;
 368           if (h0->u.msg_type != DHCPV6_MSG_RELAY_FORW)
 369             {
 370                cmac = (dhcpv6_client_mac_t *) (((uword) ip1) + b0->current_length);
 371                b0->current_length += (sizeof (*cmac));
 372                cmac->opt.length =clib_host_to_net_u16(sizeof(*cmac) -
 373                                                       sizeof(cmac->opt));
 374                cmac->opt.option = clib_host_to_net_u16(DHCPV6_OPTION_CLIENT_LINK_LAYER_ADDRESS);
 375                cmac->link_type = clib_host_to_net_u16(1); // ethernet
 376                clib_memcpy(cmac->data, client_src_mac, 6);
 377                u1->length += sizeof(*cmac);
 378             }
 379           if (server->insert_vss !=0 ) {
 380               vss1 = (dhcpv6_vss_t *) (((uword) ip1) + b0->current_length);
 381               b0->current_length += (sizeof (*vss1));
 382               vss1->opt.length =clib_host_to_net_u16(sizeof(*vss1) -
 383                                                      sizeof(vss1->opt));
 384               vss1->opt.option = clib_host_to_net_u16(DHCPV6_OPTION_VSS);
 385               vss1->data[0] = 1;   // type
 386               vss1->data[1] = oui1>>16 & 0xff;
 387               vss1->data[2] = oui1>>8  & 0xff;
 388               vss1->data[3] = oui1 & 0xff;
 389               vss1->data[4] = fib_id1>>24 & 0xff;
 390               vss1->data[5] = fib_id1>>16 & 0xff;
 391               vss1->data[6] = fib_id1>>8 & 0xff;
 392               vss1->data[7] = fib_id1 & 0xff;
 393               u1->length += sizeof(*vss1);
 394           }
 395
 396           pkts_to_server++;
 397           u1->checksum = 0;
 398           u1->src_port = clib_host_to_net_u16(UDP_DST_PORT_dhcpv6_to_client);
 399           u1->dst_port = clib_host_to_net_u16(UDP_DST_PORT_dhcpv6_to_server);
 400
 401           u1->length =
 402               clib_host_to_net_u16( clib_net_to_host_u16(fwd_opt->length) +
 403                                     sizeof(*r1) + sizeof(*fwd_opt) +
 404                                     sizeof(*u1) + sizeof(*id1) + u1->length);
 405
 406           memset(ip1, 0, sizeof(*ip1));
 407           ip1->ip_version_traffic_class_and_flow_label = 0x60;
 408           ip1->payload_length =  u1->length;
 409           ip1->protocol = PROTO_UDP;
 410           ip1->hop_limit = HOP_COUNT_LIMIT;
 411               src = (server->dhcp6_server.as_u64[0] || server->dhcp6_server.as_u64[1]) ?
 412                 &server->dhcp6_server : &dpm->all_dhcpv6_server_address;
 413           copy_ip6_address(&ip1->dst_address, src);
 414
 415
 416           ia0 = ip6_interface_first_global_or_site_address
 417               (&ip6_main, vnet_buffer(b0)->sw_if_index[VLIB_RX]);
 418
 419               src = (server->dhcp6_src_address.as_u64[0] || server->dhcp6_src_address.as_u64[1]) ?
 420                 &server->dhcp6_src_address : ia0;
 421           if (ia0 == 0)
 422             {
 423               error0 = DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS;
 424               next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
 425               pkts_no_src_address++;
 426               goto do_trace;
 427             }
 428
 429           copy_ip6_address (&ip1->src_address, src);
 430
 431
 432           u1->checksum = ip6_tcp_udp_icmp_compute_checksum(vm, b0, ip1,
 433                                                            &bogus_length);
 434           ASSERT(bogus_length == 0);
 435
 436           next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP;
 437
 438         do_trace:
 439           if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
 440             {
 441                dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
 442                                                           b0, sizeof (*tr));
 443                tr->which = 0; /* to server */
 444                tr->error = error0;
 445                tr->original_sw_if_index = rx_sw_if_index;
 446                tr->sw_if_index = sw_if_index;
 447                if (DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP == next0)
 448                  copy_ip6_address((ip6_address_t *)&tr->packet_data[0], &server->dhcp6_server);
 449             }
 450
 451         do_enqueue:
 452           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 453                                            to_next, n_left_to_next,
 454                                            bi0, next0);
 455         }
 456
 457       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 458     }
 459
 460   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 461                                DHCPV6_PROXY_ERROR_RELAY_TO_CLIENT,
 462                                pkts_to_client);
 463   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 464                                DHCPV6_PROXY_ERROR_RELAY_TO_SERVER,
 465                                pkts_to_server);
 466   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 467                                DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS,
 468                                pkts_no_interface_address);
 469   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 470                                DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE,
 471                                pkts_wrong_msg_type);
 472   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 473                                DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS,
 474                                pkts_no_src_address);
 475   vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
 476                                DHCPV6_PROXY_ERROR_PKT_TOO_BIG,
 477                                pkts_too_big);
 478   return from_frame->n_vectors;
 479 }
 480
 481 VLIB_REGISTER_NODE (dhcpv6_proxy_to_server_node) = {
 482   .function = dhcpv6_proxy_to_server_input,
 483   .name = "dhcpv6-proxy-to-server",
 484   /* Takes a vector of packets. */
 485   .vector_size = sizeof (u32),
 486
 487   .n_errors = DHCPV6_PROXY_N_ERROR,
 488   .error_strings = dhcpv6_proxy_error_strings,
 489
 490   .n_next_nodes = DHCPV6_PROXY_TO_SERVER_INPUT_N_NEXT,
 491   .next_nodes = {
 492 #define _(s,n) [DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s] = n,
 493     foreach_dhcpv6_proxy_to_server_input_next
 494 #undef _
 495   },
 496
 497   .format_buffer = format_dhcpv6_proxy_header_with_length,
 498   .format_trace = format_dhcpv6_proxy_trace,
 499 #if 0
 500   .unformat_buffer = unformat_dhcpv6_proxy_header,
 501 #endif
 502 };
 503
 504 static uword
 505 dhcpv6_proxy_to_client_input (vlib_main_t * vm,
 506                             vlib_node_runtime_t * node,
 507                             vlib_frame_t * from_frame)
 508 {
 509
 510   u32 n_left_from, * from;
 511   ethernet_main_t *em = ethernet_get_main (vm);
 512   dhcpv6_proxy_main_t * dm = &dhcpv6_proxy_main;
 513   dhcpv6_server_t * server;
 514   vnet_main_t * vnm = vnet_get_main();
 515   int bogus_length;
 516
 517   from = vlib_frame_vector_args (from_frame);
 518   n_left_from = from_frame->n_vectors;
 519
 520   while (n_left_from > 0)
 521     {
 522       u32 bi0;
 523       vlib_buffer_t * b0;
 524       udp_header_t * u0, *u1=0;
 525       dhcpv6_relay_hdr_t * h0;
 526       ip6_header_t * ip1 = 0, *ip0;
 527       ip6_address_t _ia0, * ia0 = &_ia0;
 528       ip6_address_t client_address;
 529       ethernet_interface_t *ei0;
 530       ethernet_header_t *mac0;
 531       vnet_hw_interface_t *hi0;
 532       vlib_frame_t *f0;
 533       u32 * to_next0;
 534       u32 sw_if_index = ~0;
 535       u32 original_sw_if_index = ~0;
 536       vnet_sw_interface_t *si0;
 537       u32 error0 = (u32)~0;
 538       vnet_sw_interface_t *swif;
 539       dhcpv6_option_t *r0 = 0, *o;
 540       u16 len = 0;
 541       u8 interface_opt_flag = 0;
 542       u8 relay_msg_opt_flag = 0;
 543       ip6_fib_t * svr_fib;
 544       ip6_main_t * im = &ip6_main;
 545       u32 server_fib_idx, svr_fib_id, client_fib_idx, server_idx;
 546
 547       bi0 = from[0];
 548       from += 1;
 549       n_left_from -= 1;
 550
 551       b0 = vlib_get_buffer (vm, bi0);
 552       h0 = vlib_buffer_get_current (b0);
 553
 554       if (DHCPV6_MSG_RELAY_REPL != h0->msg_type)
 555         {
 556           error0 =  DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
 557
 558         drop_packet:
 559           vlib_node_increment_counter (vm, dhcpv6_proxy_to_client_node.index,
 560                                        error0, 1);
 561
 562           f0 = vlib_get_frame_to_node (vm, dm->error_drop_node_index);
 563           to_next0 = vlib_frame_vector_args (f0);
 564           to_next0[0] = bi0;
 565           f0->n_vectors = 1;
 566           vlib_put_frame_to_node (vm, dm->error_drop_node_index, f0);
 567           goto do_trace;
 568         }
 569       /* hop count seems not need to be checked */
 570       if (HOP_COUNT_LIMIT < h0->hop_count)
 571         {
 572           error0 =  DHCPV6_RELAY_PKT_DROP_MAX_HOPS;
 573           goto drop_packet;
 574         }
 575       u0 = (void *)h0 -(sizeof(*u0));
 576       ip0 = (void *)u0 -(sizeof(*ip0));
 577
 578       vlib_buffer_advance (b0, sizeof(*h0));
 579       o = vlib_buffer_get_current (b0);
 580
 581       /* Parse through TLVs looking for option 18 (DHCPV6_OPTION_INTERFACE_ID)
 582          _and_ option 9 (DHCPV6_OPTION_RELAY_MSG) option which must be there.
 583          Currently assuming no other options need to be processed
 584          The interface-ID is the FIB number we need
 585          to track down the client-facing interface */
 586
 587       while ((u8 *) o < (b0->data + b0->current_data + b0->current_length))
 588         {
 589            if (DHCPV6_OPTION_INTERFACE_ID == clib_net_to_host_u16(o->option))
 590              {
 591                 interface_opt_flag = 1;
 592                 if (clib_net_to_host_u16(o->length) == sizeof(sw_if_index))
 593                     sw_if_index = clib_net_to_host_u32(((dhcpv6_int_id_t*)o)->int_idx);
 594                 if (sw_if_index >= vec_len (im->fib_index_by_sw_if_index))
 595                   {
 596                     error0 = DHCPV6_PROXY_ERROR_WRONG_INTERFACE_ID_OPTION;
 597                     goto drop_packet;
 598                   }
 599              }
 600            if (DHCPV6_OPTION_RELAY_MSG == clib_net_to_host_u16(o->option))
 601              {
 602                 relay_msg_opt_flag = 1;
 603                 r0 = vlib_buffer_get_current (b0);
 604              }
 605            if ((relay_msg_opt_flag == 1) && (interface_opt_flag == 1))
 606              break;
 607            vlib_buffer_advance (b0, sizeof(*o) + clib_net_to_host_u16(o->length));
 608            o = (dhcpv6_option_t *) (((uword) o) + clib_net_to_host_u16(o->length) + sizeof(*o));
 609         }
 610
 611       if ((relay_msg_opt_flag == 0) || (r0 == 0))
 612         {
 613           error0 = DHCPV6_PROXY_ERROR_NO_RELAY_MESSAGE_OPTION;
 614           goto drop_packet;
 615         }
 616
 617       if ((u32)~0 == sw_if_index)
 618         {
 619           error0 = DHCPV6_PROXY_ERROR_NO_CIRCUIT_ID_OPTION;
 620           goto drop_packet;
 621         }
 622
 623       //Advance buffer to start of encapsulated DHCPv6 message
 624       vlib_buffer_advance (b0, sizeof(*r0));
 625
 626       client_fib_idx = im->fib_index_by_sw_if_index[sw_if_index];
 627       if (client_fib_idx < vec_len(dm->dhcp6_server_index_by_rx_fib_index))
 628           server_idx = dm->dhcp6_server_index_by_rx_fib_index[client_fib_idx];
 629       else
 630           server_idx = 0;
 631
 632       if (PREDICT_FALSE (pool_is_free_index (dm->dhcp6_servers, server_idx)))
 633         {
 634           error0 = DHCPV6_PROXY_ERROR_WRONG_INTERFACE_ID_OPTION;
 635           goto drop_packet;
 636         }
 637
 638       server = pool_elt_at_index (dm->dhcp6_servers, server_idx);
 639       if (server->valid == 0)
 640       {
 641           error0 = DHCPV6_PROXY_ERROR_NO_SERVER;
 642           goto drop_packet;
 643       }
 644
 645
 646       server_fib_idx = im->fib_index_by_sw_if_index
 647           [vnet_buffer(b0)->sw_if_index[VLIB_RX]];
 648       svr_fib = ip6_fib_get (server_fib_idx);
 649       svr_fib_id = svr_fib->table_id;
 650
 651       if (svr_fib_id != server->server_fib6_index ||
 652           ip0->src_address.as_u64[0] != server->dhcp6_server.as_u64[0] ||
 653           ip0->src_address.as_u64[1] != server->dhcp6_server.as_u64[1])
 654         {
 655           //drop packet if not from server with configured address or FIB
 656           error0 = DHCPV6_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS;
 657           goto drop_packet;
 658         }
 659
 660       vnet_buffer (b0)->sw_if_index[VLIB_TX] = original_sw_if_index
 661           = sw_if_index;
 662
 663       swif = vnet_get_sw_interface (vnm, original_sw_if_index);
 664       if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
 665           sw_if_index = swif->unnumbered_sw_if_index;
 666
 667
 668       /*
 669        * udp_local hands us the DHCPV6 header, need udp hdr,
 670        * ip hdr to relay to client
 671        */
 672       vlib_buffer_advance (b0, -(sizeof(*u1)));
 673       u1 = vlib_buffer_get_current (b0);
 674
 675       vlib_buffer_advance (b0, -(sizeof(*ip1)));
 676       ip1 = vlib_buffer_get_current (b0);
 677
 678       copy_ip6_address(&client_address, &h0->peer_addr);
 679
 680       ia0 = ip6_interface_first_address (&ip6_main, sw_if_index);
 681       if (ia0 == 0)
 682         {
 683           error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
 684           goto drop_packet;
 685         }
 686
 687       len =  clib_net_to_host_u16(r0->length);
 688       memset(ip1, 0, sizeof(*ip1));
 689       copy_ip6_address(&ip1->dst_address, &client_address);
 690       u1->checksum = 0;
 691       u1->src_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_server);
 692       u1->dst_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_client);
 693       u1->length = clib_host_to_net_u16 (len + sizeof(udp_header_t));
 694
 695       ip1->ip_version_traffic_class_and_flow_label =
 696           ip0->ip_version_traffic_class_and_flow_label &
 697           0x00000fff;
 698       ip1->payload_length =  u1->length;
 699       ip1->protocol = PROTO_UDP;
 700       ip1->hop_limit = HOP_COUNT_LIMIT;
 701       copy_ip6_address(&ip1->src_address, ia0);
 702
 703       u1->checksum = ip6_tcp_udp_icmp_compute_checksum(vm, b0, ip1,
 704                                                        &bogus_length);
 705       ASSERT(bogus_length == 0);
 706
 707       vlib_buffer_advance (b0, -(sizeof(ethernet_header_t)));
 708       si0 = vnet_get_sw_interface (vnm, original_sw_if_index);
 709       if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
 710           vlib_buffer_advance (b0, -4 /* space for VLAN tag */);
 711
 712       mac0 = vlib_buffer_get_current (b0);
 713
 714       hi0 = vnet_get_sup_hw_interface (vnm, original_sw_if_index);
 715       ei0 = pool_elt_at_index (em->interfaces, hi0->hw_instance);
 716       clib_memcpy (mac0->src_address, ei0->address, sizeof (ei0->address));
 717       memset (&mac0->dst_address, 0xff, sizeof (mac0->dst_address));
 718       mac0->type = (si0->type == VNET_SW_INTERFACE_TYPE_SUB) ?
 719         clib_net_to_host_u16(0x8100) : clib_net_to_host_u16 (0x86dd);
 720
 721       if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
 722         {
 723           u32 * vlan_tag = (u32 *)(mac0+1);
 724           u32 tmp;
 725           tmp = (si0->sub.id << 16) | 0x0800;
 726           *vlan_tag = clib_host_to_net_u32 (tmp);
 727         }
 728
 729       /* $$$ consider adding a dynamic next to the graph node, for performance */
 730       f0 = vlib_get_frame_to_node (vm, hi0->output_node_index);
 731       to_next0 = vlib_frame_vector_args (f0);
 732       to_next0[0] = bi0;
 733       f0->n_vectors = 1;
 734       vlib_put_frame_to_node (vm, hi0->output_node_index, f0);
 735
 736     do_trace:
 737       if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
 738         {
 739           dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
 740                                                      b0, sizeof (*tr));
 741           tr->which = 1; /* to client */
 742           if (ia0)
 743               copy_ip6_address((ip6_address_t*)tr->packet_data, ia0);
 744           tr->error = error0;
 745           tr->original_sw_if_index = original_sw_if_index;
 746           tr->sw_if_index = sw_if_index;
 747         }
 748     }
 749   return from_frame->n_vectors;
 750
 751 }
 752
 753 VLIB_REGISTER_NODE (dhcpv6_proxy_to_client_node) = {
 754   .function = dhcpv6_proxy_to_client_input,
 755   .name = "dhcpv6-proxy-to-client",
 756   /* Takes a vector of packets. */
 757   .vector_size = sizeof (u32),
 758
 759   .n_errors = DHCPV6_PROXY_N_ERROR,
 760   .error_strings = dhcpv6_proxy_error_strings,
 761   .format_buffer = format_dhcpv6_proxy_header_with_length,
 762   .format_trace = format_dhcpv6_proxy_trace,
 763 #if 0
 764   .unformat_buffer = unformat_dhcpv6_proxy_header,
 765 #endif
 766 };
 767
 768 clib_error_t * dhcpv6_proxy_init (vlib_main_t * vm)
 769 {
 770   dhcpv6_proxy_main_t * dm = &dhcpv6_proxy_main;
 771   vlib_node_t * error_drop_node;
 772   dhcpv6_server_t * server;
 773
 774   dm->vlib_main = vm;
 775   dm->vnet_main = vnet_get_main();
 776   error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
 777   dm->error_drop_node_index = error_drop_node->index;
 778
 779   dm->vss_index_by_vrf_id = hash_create (0, sizeof (uword));
 780
 781   /* RFC says this is the dhcpv6 server address  */
 782   dm->all_dhcpv6_server_address.as_u64[0] = clib_host_to_net_u64 (0xFF05000000000000);
 783   dm->all_dhcpv6_server_address.as_u64[1] = clib_host_to_net_u64 (0x00010003);
 784
 785   /* RFC says this is the server and agent address */
 786   dm->all_dhcpv6_server_relay_agent_address.as_u64[0] = clib_host_to_net_u64 (0xFF02000000000000);
 787   dm->all_dhcpv6_server_relay_agent_address.as_u64[1] = clib_host_to_net_u64 (0x00010002);
 788
 789   udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
 790                          dhcpv6_proxy_to_client_node.index, 0 /* is_ip6 */);
 791
 792   udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
 793                          dhcpv6_proxy_to_server_node.index, 0 /* is_ip6 */);
 794
 795   /* Create the default server, don't mark it valid */
 796   pool_get (dm->dhcp6_servers, server);
 797   memset (server, 0, sizeof (*server));
 798
 799   return 0;
 800 }
 801
 802 VLIB_INIT_FUNCTION (dhcpv6_proxy_init);
 803
 804 /* Old API, manipulates a single server (only) shared by all Rx VRFs */
 805 int dhcpv6_proxy_set_server (ip6_address_t *addr, ip6_address_t *src_address,
 806                              u32 fib_id, int insert_vss, int is_del)
 807 {
 808         return dhcpv6_proxy_set_server_2 (addr, src_address,
 809                         0, fib_id,
 810                         insert_vss, is_del);
 811 }
 812
 813 int dhcpv6_proxy_set_server_2 (ip6_address_t *addr, ip6_address_t *src_address,
 814                              u32 rx_fib_id, u32 server_fib_id,
 815                                                          int insert_vss, int is_del)
 816 {
 817   dhcpv6_proxy_main_t * dm = &dhcpv6_proxy_main;
 818   dhcpv6_server_t * server = 0;
 819   u32 server_fib_index = 0;
 820   u32 rx_fib_index = 0;
 821
 822   rx_fib_index = ip6_fib_table_find_or_create_and_lock(rx_fib_id);
 823   server_fib_index = ip6_fib_table_find_or_create_and_lock(server_fib_id);
 824
 825   if (is_del)
 826       {
 827
 828           if (rx_fib_index >= vec_len(dm->dhcp6_server_index_by_rx_fib_index))
 829                   return VNET_API_ERROR_NO_SUCH_ENTRY;
 830
 831           server_fib_index = dm->dhcp6_server_index_by_rx_fib_index[rx_fib_index];
 832
 833           dm->dhcp6_server_index_by_rx_fib_index[rx_fib_index] = 0;
 834           server = pool_elt_at_index (dm->dhcp6_servers, server_fib_index);
 835           memset (server, 0, sizeof (*server));
 836           pool_put (dm->dhcp6_servers, server);
 837           return 0;
 838       }
 839
 840   if (addr->as_u64[0] == 0 &&
 841         addr->as_u64[1] == 0 )
 842       return VNET_API_ERROR_INVALID_DST_ADDRESS;
 843
 844     if (src_address->as_u64[0] == 0 &&
 845         src_address->as_u64[1] == 0)
 846       return VNET_API_ERROR_INVALID_SRC_ADDRESS;
 847
 848   if (rx_fib_id == 0)
 849     {
 850       server = pool_elt_at_index (dm->dhcp6_servers, 0);
 851
 852       goto initialize_it;
 853     }
 854
 855   if (rx_fib_index < vec_len(dm->dhcp6_server_index_by_rx_fib_index))
 856     {
 857       server_fib_index = dm->dhcp6_server_index_by_rx_fib_index[rx_fib_index];
 858       if (server_fib_index != 0)
 859         {
 860           server = pool_elt_at_index (dm->dhcp6_servers, server_fib_index);
 861           goto initialize_it;
 862         }
 863     }
 864
 865   /*Allocate a new server*/
 866   pool_get (dm->dhcp6_servers, server);
 867
 868   initialize_it:
 869
 870   copy_ip6_address(&server->dhcp6_server, addr);
 871   copy_ip6_address(&server->dhcp6_src_address, src_address);
 872   server->server_fib6_index = server_fib_index;
 873   server->valid = 1;
 874   server->insert_vss = insert_vss;
 875
 876   vec_validate (dm->dhcp6_server_index_by_rx_fib_index, rx_fib_index);
 877   dm->dhcp6_server_index_by_rx_fib_index[rx_fib_index] =
 878                   server - dm->dhcp6_servers;
 879
 880   return 0;
 881 }
 882
 883 static clib_error_t *
 884 dhcpv6_proxy_set_command_fn (vlib_main_t * vm,
 885                            unformat_input_t * input,
 886                            vlib_cli_command_t * cmd)
 887 {
 888   ip6_address_t addr, src_addr;
 889   int set_server = 0, set_src_address = 0;
 890   u32 rx_fib_id = 0, server_fib_id = 0;
 891   int is_del = 0, add_vss = 0;
 892
 893   while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT)
 894     {
 895       if (unformat (input, "server %U",
 896                     unformat_ip6_address, &addr))
 897          set_server = 1;
 898       else if (unformat(input, "src-address %U",
 899                         unformat_ip6_address, &src_addr))
 900           set_src_address =1;
 901        else if (unformat (input, "server-fib-id %d", &server_fib_id))
 902         ;
 903        else if (unformat (input, "rx-fib-id %d", &rx_fib_id))
 904          ;
 905        else if (unformat (input, "add-vss-option")
 906                || unformat (input, "insert-option"))
 907           add_vss = 1;
 908        else if (unformat (input, "delete") ||
 909                 unformat (input, "del"))
 910            is_del = 1;
 911       else
 912         break;
 913     }
 914
 915   if (is_del || (set_server && set_src_address))
 916   {
 917       int rv;
 918
 919       rv = dhcpv6_proxy_set_server_2 (&addr, &src_addr, rx_fib_id,
 920                   server_fib_id, add_vss, is_del);
 921
 922       //TODO: Complete the errors
 923       switch (rv)
 924         {
 925         case 0:
 926           return 0;
 927
 928         case -1:
 929           return clib_error_return (0, "FIB id %d does not exist", server_fib_id);
 930
 931         default:
 932           return clib_error_return (0, "BUG: rv %d", rv);
 933         }
 934   }
 935   else
 936     return clib_error_return (0, "parse error`%U'",
 937                               format_unformat_error, input);
 938 }
 939
 940 VLIB_CLI_COMMAND (dhcpv6_proxy_set_command, static) = {
 941   .path = "set dhcpv6 proxy",
 942   .short_help = "set dhcpv6 proxy [del] server <ipv6-addr> src-address <ipv6-addr> "
 943                   "[add-vss-option] [server-fib-id <fib-id>] [rx-fib-id <fib-id>] ",
 944   .function = dhcpv6_proxy_set_command_fn,
 945 };
 946
 947 u8 * format_dhcpv6_proxy_server (u8 * s, va_list * args)
 948 {
 949   dhcpv6_proxy_main_t * dm = va_arg (*args, dhcpv6_proxy_main_t *);
 950   dhcpv6_server_t * server = va_arg (*args, dhcpv6_server_t *);
 951   u32 rx_fib_index = va_arg (*args, u32);
 952   ip6_fib_t * rx_fib, * server_fib;
 953   u32 server_fib_id = (u32)~0, rx_fib_id = ~0;
 954
 955   if (dm == 0)
 956     {
 957       s = format (s, "%=40s%=40s%=14s%=14s%=20s", "Server Address", "Source Address",
 958                   "Server FIB", "RX FIB", "Insert VSS Option");
 959       return s;
 960     }
 961
 962   server_fib = ip6_fib_get(server->server_fib6_index);
 963   if (server_fib)
 964           server_fib_id= server_fib->table_id;
 965
 966   rx_fib= ip6_fib_get(rx_fib_index);
 967
 968   if (rx_fib)
 969           rx_fib_id = rx_fib->table_id;
 970
 971   s = format (s, "%=40U%=40U%=14u%=14u%=20s",
 972               format_ip6_address, &server->dhcp6_server,
 973               format_ip6_address, &server->dhcp6_src_address,
 974                           server_fib_id, rx_fib_id,
 975                                         server->insert_vss ? "yes" : "no");
 976   return s;
 977 }
 978
 979 static clib_error_t *
 980 dhcpv6_proxy_show_command_fn (vlib_main_t * vm,
 981                             unformat_input_t * input,
 982                             vlib_cli_command_t * cmd)
 983 {
 984   dhcpv6_proxy_main_t * dm = &dhcpv6_proxy_main;
 985   ip6_main_t * im = &ip6_main;
 986   int i;
 987   u32 server_index;
 988   dhcpv6_server_t * server;
 989
 990   vlib_cli_output (vm, "%U", format_dhcpv6_proxy_server, 0 /* header line */,
 991                   0, 0);
 992   for (i = 0; i < vec_len (im->fibs); i++)
 993       {
 994         if (i < vec_len(dm->dhcp6_server_index_by_rx_fib_index))
 995           server_index = dm->dhcp6_server_index_by_rx_fib_index[i];
 996         else
 997           server_index = 0;
 998         server = pool_elt_at_index (dm->dhcp6_servers, server_index);
 999         if (server->valid)
1000           vlib_cli_output (vm, "%U", format_dhcpv6_proxy_server, dm,
1001                   server, i);
1002       }
1003   return 0;
1004 }
1005
1006 VLIB_CLI_COMMAND (dhcpv6_proxy_show_command, static) = {
1007   .path = "show dhcpv6 proxy",
1008   .short_help = "Display dhcpv6 proxy info",
1009   .function = dhcpv6_proxy_show_command_fn,
1010 };
1011
1012 int dhcpv6_proxy_set_vss(u32 tbl_id,
1013                          u32 oui,
1014                          u32 fib_id,
1015                          int is_del)
1016 {
1017   dhcpv6_proxy_main_t *dm = &dhcpv6_proxy_main;
1018   u32 old_oui, old_fib_id;
1019   uword *p;
1020   dhcpv6_vss_info *v;
1021
1022   p = hash_get (dm->vss_index_by_vrf_id, tbl_id);
1023
1024   if (p) {
1025       v = pool_elt_at_index (dm->vss, p[0]);
1026       if (!v)
1027         return VNET_API_ERROR_NO_SUCH_FIB;
1028
1029       old_oui = v->vpn_id.oui;
1030       old_fib_id = v->vpn_id.fib_id;
1031
1032       if (is_del)
1033       {
1034           if (old_oui == oui &&
1035               old_fib_id == fib_id )
1036           {
1037               pool_put(dm->vss, v);
1038               hash_unset (dm->vss_index_by_vrf_id, tbl_id);
1039               return 0;
1040           }
1041           else
1042             return VNET_API_ERROR_NO_SUCH_ENTRY;
1043       }
1044
1045       pool_put(dm->vss, v);
1046       hash_unset (dm->vss_index_by_vrf_id, tbl_id);
1047   } else if (is_del)
1048     return VNET_API_ERROR_NO_SUCH_ENTRY;
1049
1050   pool_get (dm->vss, v);
1051   memset (v, ~0, sizeof (*v));
1052   v->vpn_id.fib_id = fib_id;
1053   v->vpn_id.oui = oui;
1054   hash_set (dm->vss_index_by_vrf_id, tbl_id, v - dm->vss);
1055
1056   return 0;
1057 }
1058
1059
1060 static clib_error_t *
1061 dhcpv6_vss_command_fn (vlib_main_t * vm,
1062                            unformat_input_t * input,
1063                            vlib_cli_command_t * cmd)
1064 {
1065   int is_del = 0, got_new_vss=0;
1066   u32 oui=0;
1067   u32 fib_id=0, tbl_id=~0;
1068
1069   while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT)
1070     {
1071       if (unformat (input, "oui %d", &oui))
1072           got_new_vss = 1;
1073       else if (unformat (input, "vpn-id %d", &fib_id))
1074           got_new_vss = 1;
1075       else if (unformat (input, "table %d", &tbl_id))
1076           got_new_vss = 1;
1077       else if (unformat(input, "delete") || unformat(input, "del"))
1078           is_del = 1;
1079       else
1080           break;
1081     }
1082
1083   if (tbl_id ==~0)
1084       return clib_error_return (0, "no table ID specified.");
1085
1086   if (is_del || got_new_vss)
1087     {
1088       int rv;
1089
1090       rv = dhcpv6_proxy_set_vss(tbl_id, oui, fib_id, is_del);
1091       switch (rv)
1092         {
1093         case 0:
1094           return 0;
1095
1096         case VNET_API_ERROR_NO_SUCH_FIB:
1097             return clib_error_return (0, "vss info (oui:%d, vpn-id:%d)  not found in table %d.",
1098                                       oui, fib_id, tbl_id);
1099
1100         case VNET_API_ERROR_NO_SUCH_ENTRY:
1101             return clib_error_return (0, "vss for table %d not found in pool.",
1102                                       tbl_id);
1103
1104         default:
1105           return clib_error_return (0, "BUG: rv %d", rv);
1106         }
1107     }
1108   else
1109       return clib_error_return (0, "parse error`%U'",
1110                                 format_unformat_error, input);
1111
1112 }
1113
1114 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_command, static) = {
1115   .path = "set dhcpv6 vss",
1116   .short_help = "set dhcpv6 vss table <table-id> oui <oui> vpn-idx <vpn-idx>",
1117   .function = dhcpv6_vss_command_fn,
1118 };
1119
1120 static clib_error_t *
1121 dhcpv6_vss_show_command_fn (vlib_main_t * vm,
1122                             unformat_input_t * input,
1123                             vlib_cli_command_t * cmd)
1124
1125 {
1126   dhcpv6_proxy_main_t * dm = &dhcpv6_proxy_main;
1127   dhcpv6_vss_info *v;
1128   u32 oui;
1129   u32 fib_id;
1130   u32 tbl_id;
1131   uword index;
1132
1133   vlib_cli_output (vm, "%=6s%=6s%=12s","Table", "OUI", "VPN ID");
1134   hash_foreach (tbl_id, index, dm->vss_index_by_vrf_id,
1135   ({
1136      v = pool_elt_at_index (dm->vss, index);
1137      oui = v->vpn_id.oui;
1138      fib_id = v->vpn_id.fib_id;
1139      vlib_cli_output (vm, "%=6d%=6d%=12d",
1140                       tbl_id, oui, fib_id);
1141   }));
1142
1143   return 0;
1144 }
1145
1146 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_show_command, static) = {
1147   .path = "show dhcpv6 vss",
1148   .short_help = "show dhcpv6 VSS",
1149   .function = dhcpv6_vss_show_command_fn,
1150 };
1151
1152 static clib_error_t *
1153 dhcpv6_link_address_show_command_fn (vlib_main_t * vm,
1154                                 unformat_input_t * input,
1155                                 vlib_cli_command_t * cmd)
1156
1157 {
1158   dhcpv6_proxy_main_t *dm = &dhcpv6_proxy_main;
1159   vnet_main_t *vnm = vnet_get_main();
1160   u32 sw_if_index0=0, sw_if_index;
1161   ip6_address_t *ia0;
1162   vnet_sw_interface_t *swif;
1163
1164   while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT)
1165     {
1166
1167       if (unformat(input, "%U",
1168                    unformat_vnet_sw_interface, dm->vnet_main, &sw_if_index0))
1169         {
1170             swif = vnet_get_sw_interface (vnm, sw_if_index0);
1171             sw_if_index = (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) ?
1172                 swif->unnumbered_sw_if_index : sw_if_index0;
1173             ia0 = ip6_interface_first_address(&ip6_main, sw_if_index);
1174             if (ia0)
1175               {
1176                   vlib_cli_output (vm, "%=20s%=48s", "interface", "link-address");
1177
1178                   vlib_cli_output (vm, "%=20U%=48U",
1179                                    format_vnet_sw_if_index_name, dm->vnet_main, sw_if_index0,
1180                                    format_ip6_address, ia0);
1181               } else
1182                 vlib_cli_output (vm, "%=34s%=20U", "No IPv6 address configured on",
1183                                  format_vnet_sw_if_index_name, dm->vnet_main, sw_if_index);
1184         } else
1185           break;
1186     }
1187
1188   return 0;
1189 }
1190
1191 VLIB_CLI_COMMAND (dhcpv6_proxy_address_show_command, static) = {
1192   .path = "show dhcpv6 link-address interface",
1193   .short_help = "show dhcpv6 link-address interface <interface>",
1194   .function = dhcpv6_link_address_show_command_fn,
1195 };