src/vnet/dhcp/dhcp6_pd_client_cp.c

   1 /*
   2  * Copyright (c) 2018 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #include <vnet/vnet.h>
  17 #include <vlibmemory/api.h>
  18 #include <vnet/vnet_msg_enum.h>
  19 #include <vnet/dhcp/dhcp6_packet.h>
  20 #include <vnet/dhcp/dhcp6_pd_client_dp.h>
  21 #include <vnet/ip/ip.h>
  22 #include <vnet/ip/ip6.h>
  23 #include <float.h>
  24 #include <math.h>
  25 #include <string.h>
  26
  27 #define vl_typedefs             /* define message structures */
  28 #include <vnet/vnet_all_api_h.h>
  29 #undef vl_typedefs
  30
  31 #define vl_endianfun            /* define message structures */
  32 #include <vnet/vnet_all_api_h.h>
  33 #undef vl_endianfun
  34
  35 #include <vlibapi/api_helper_macros.h>
  36
  37 #define foreach_dhcp6_pd_client_cp_msg                                        \
  38 _(DHCP6_PD_CLIENT_ENABLE_DISABLE, dhcp6_pd_client_enable_disable)             \
  39 _(IP6_ADD_DEL_ADDRESS_USING_PREFIX, ip6_add_del_address_using_prefix)
  40
  41 #define vl_api_dhcp6_pd_client_enable_disable_t_print vl_noop_handler
  42 #define vl_api_ip6_add_del_address_using_prefix_t_print vl_noop_handler
  43
  44 typedef struct
  45 {
  46   u32 prefix_group_index;
  47   uword opaque_data;            // used by prefix publisher
  48   ip6_address_t prefix;
  49   u8 prefix_length;
  50   u32 preferred_lt;
  51   u32 valid_lt;
  52   f64 due_time;
  53 } prefix_info_t;
  54
  55 typedef struct
  56 {
  57   u8 enabled;
  58   u32 prefix_group_index;
  59   u32 server_index;
  60   u32 T1;
  61   u32 T2;
  62   f64 T1_due_time;
  63   f64 T2_due_time;
  64   u32 prefix_count;
  65   u8 rebinding;
  66 } client_state_t;
  67
  68 typedef struct
  69 {
  70   client_state_t *client_state_by_sw_if_index;
  71   clib_bitmap_t *prefix_ownership_bitmap;
  72   u32 n_clients;
  73   f64 max_valid_due_time;
  74
  75   /* convenience */
  76   vlib_main_t *vlib_main;
  77   vnet_main_t *vnet_main;
  78   api_main_t *api_main;
  79   u32 node_index;
  80 } dhcp6_pd_client_cp_main_t;
  81
  82 static dhcp6_pd_client_cp_main_t dhcp6_pd_client_cp_main;
  83
  84 typedef struct
  85 {
  86   prefix_info_t *prefix_pool;
  87   const u8 **prefix_group_name_by_index;
  88 } ip6_prefix_main_t;
  89
  90 static ip6_prefix_main_t ip6_prefix_main;
  91
  92 typedef struct
  93 {
  94   /* config */
  95   u32 sw_if_index;
  96   u32 prefix_group_index;
  97   ip6_address_t address;
  98   u8 prefix_length;
  99
 100   /* state */
 101   u8 configured_in_data_plane;
 102 } ip6_address_info_t;
 103
 104 typedef struct
 105 {
 106   ip6_address_info_t *addresses;
 107   u32 *active_prefix_index_by_prefix_group_index;
 108 } ip6_address_with_prefix_main_t;
 109
 110 static ip6_address_with_prefix_main_t ip6_address_with_prefix_main;
 111
 112 enum
 113 {
 114   DHCPV6_PD_EVENT_INTERRUPT,
 115   DHCPV6_PD_EVENT_DISABLE,
 116 };
 117
 118 static_always_inline u32
 119 active_prefix_index_by_prefix_group_index_get (u32 prefix_group_index)
 120 {
 121   ip6_address_with_prefix_main_t *apm = &ip6_address_with_prefix_main;
 122
 123   if (prefix_group_index >=
 124       vec_len (apm->active_prefix_index_by_prefix_group_index))
 125     return ~0;
 126
 127   return apm->active_prefix_index_by_prefix_group_index[prefix_group_index];
 128 }
 129
 130 static_always_inline void
 131 active_prefix_index_by_prefix_group_index_set (u32 prefix_group_index,
 132                                                u32 prefix_index)
 133 {
 134   ip6_address_with_prefix_main_t *apm = &ip6_address_with_prefix_main;
 135   static const u32 empty = ~0;
 136
 137   ASSERT (prefix_group_index != ~0);
 138
 139   if (prefix_index == ~0
 140       && prefix_group_index >=
 141       vec_len (apm->active_prefix_index_by_prefix_group_index))
 142     return;
 143
 144   vec_validate_init_empty (apm->active_prefix_index_by_prefix_group_index,
 145                            prefix_group_index, empty);
 146   apm->active_prefix_index_by_prefix_group_index[prefix_group_index] =
 147     prefix_index;
 148 }
 149
 150 static_always_inline u8
 151 is_dhcpv6_pd_prefix (prefix_info_t * prefix_info)
 152 {
 153   dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main;
 154   ip6_prefix_main_t *pm = &ip6_prefix_main;
 155   u32 prefix_index;
 156
 157   prefix_index = prefix_info - pm->prefix_pool;
 158   return clib_bitmap_get (rm->prefix_ownership_bitmap, prefix_index);
 159 }
 160
 161 static_always_inline void
 162 set_is_dhcpv6_pd_prefix (prefix_info_t * prefix_info, u8 value)
 163 {
 164   dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main;
 165   ip6_prefix_main_t *pm = &ip6_prefix_main;
 166   u32 prefix_index;
 167
 168   prefix_index = prefix_info - pm->prefix_pool;
 169   rm->prefix_ownership_bitmap =
 170     clib_bitmap_set (rm->prefix_ownership_bitmap, prefix_index, value);
 171 }
 172
 173 static void
 174 cp_ip6_address_prefix_add_del_handler (u32 prefix_index, u8 is_add);
 175
 176 static void
 177 notify_prefix_add_del (u32 prefix_index, u8 is_add)
 178 {
 179   // TODO: use registries
 180   cp_ip6_address_prefix_add_del_handler (prefix_index, is_add);
 181 }
 182
 183 static void
 184 send_client_message_start_stop (u32 sw_if_index, u32 server_index,
 185                                 u8 msg_type, prefix_info_t * prefix_list,
 186                                 u8 start)
 187 {
 188   dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main;
 189   dhcp6_pd_send_client_message_params_t params = { 0, };
 190   dhcp6_pd_send_client_message_params_prefix_t *prefixes = 0, *pref;
 191   u32 i;
 192
 193   ASSERT (sw_if_index < vec_len (rm->client_state_by_sw_if_index) &&
 194           rm->client_state_by_sw_if_index[sw_if_index].enabled);
 195   client_state_t *client_state =
 196     &rm->client_state_by_sw_if_index[sw_if_index];
 197
 198   params.sw_if_index = sw_if_index;
 199   params.server_index = server_index;
 200   params.msg_type = msg_type;
 201   if (start)
 202     {
 203       if (msg_type == DHCPV6_MSG_SOLICIT)
 204         {
 205           params.irt = 1;
 206           params.mrt = 120;
 207         }
 208       else if (msg_type == DHCPV6_MSG_REQUEST)
 209         {
 210           params.irt = 1;
 211           params.mrt = 30;
 212           params.mrc = 10;
 213         }
 214       else if (msg_type == DHCPV6_MSG_RENEW)
 215         {
 216           params.irt = 10;
 217           params.mrt = 600;
 218           f64 current_time = vlib_time_now (rm->vlib_main);
 219           i32 diff_time = client_state->T2 - current_time;
 220           if (diff_time < 0)
 221             diff_time = 0;
 222           params.mrd = diff_time;
 223         }
 224       else if (msg_type == DHCPV6_MSG_REBIND)
 225         {
 226           params.irt = 10;
 227           params.mrt = 600;
 228           f64 current_time = vlib_time_now (rm->vlib_main);
 229           i32 diff_time = rm->max_valid_due_time - current_time;
 230           if (diff_time < 0)
 231             diff_time = 0;
 232           params.mrd = diff_time;
 233         }
 234       else if (msg_type == DHCPV6_MSG_RELEASE)
 235         {
 236           params.mrc = 1;
 237         }
 238     }
 239
 240   params.T1 = 0;
 241   params.T2 = 0;
 242   if (vec_len (prefix_list) != 0)
 243     vec_validate (prefixes, vec_len (prefix_list) - 1);
 244   for (i = 0; i < vec_len (prefix_list); i++)
 245     {
 246       prefix_info_t *prefix = &prefix_list[i];
 247       pref = &prefixes[i];
 248       pref->valid_lt = prefix->valid_lt;
 249       pref->preferred_lt = prefix->preferred_lt;
 250       pref->prefix = prefix->prefix;
 251       pref->prefix_length = prefix->prefix_length;
 252     }
 253   params.prefixes = prefixes;
 254
 255   dhcp6_pd_send_client_message (rm->vlib_main, sw_if_index, !start, &params);
 256
 257   vec_free (params.prefixes);
 258 }
 259
 260 static void interrupt_process (void);
 261
 262 static u32
 263 ip6_enable (u32 sw_if_index)
 264 {
 265   dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main;
 266   clib_error_t *rv;
 267
 268   rv = enable_ip6_interface (rm->vlib_main, sw_if_index);
 269
 270   return rv != 0;
 271 }
 272
 273 static u8
 274 ip6_prefixes_equal (ip6_address_t * prefix1, ip6_address_t * prefix2, u8 len)
 275 {
 276   if (len >= 64)
 277     {
 278       if (prefix1->as_u64[0] != prefix2->as_u64[0])
 279         return 0;
 280       if (len == 64)
 281         return 1;
 282       return clib_net_to_host_u64 (prefix1->as_u64[1]) >> (128 - len) ==
 283         clib_net_to_host_u64 (prefix2->as_u64[1]) >> (128 - len);
 284     }
 285   return clib_net_to_host_u64 (prefix1->as_u64[0]) >> (64 - len) ==
 286     clib_net_to_host_u64 (prefix2->as_u64[0]) >> (64 - len);
 287 }
 288
 289 static clib_error_t *
 290 dhcp6_pd_reply_event_handler (vl_api_dhcp6_pd_reply_event_t * mp)
 291 {
 292   dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main;
 293   ip6_prefix_main_t *pm = &ip6_prefix_main;
 294   vlib_main_t *vm = rm->vlib_main;
 295   client_state_t *client_state;
 296   ip6_address_t *prefix;
 297   u32 sw_if_index;
 298   u32 n_prefixes;
 299   vl_api_dhcp6_pd_prefix_info_t *api_prefix;
 300   u32 inner_status_code;
 301   u32 status_code;
 302   u32 server_index;
 303   f64 current_time;
 304   clib_error_t *error = 0;
 305   u32 i;
 306
 307   current_time = vlib_time_now (vm);
 308
 309   sw_if_index = ntohl (mp->sw_if_index);
 310
 311   if (sw_if_index >= vec_len (rm->client_state_by_sw_if_index))
 312     return 0;
 313
 314   client_state = &rm->client_state_by_sw_if_index[sw_if_index];
 315
 316   if (!client_state->enabled)
 317     return 0;
 318
 319   server_index = ntohl (mp->server_index);
 320
 321   n_prefixes = ntohl (mp->n_prefixes);
 322
 323   inner_status_code = ntohs (mp->inner_status_code);
 324   status_code = ntohs (mp->status_code);
 325
 326   if (mp->msg_type == DHCPV6_MSG_API_ADVERTISE
 327       && client_state->server_index == ~0)
 328     {
 329       prefix_info_t *prefix_list = 0, *prefix_info;
 330       u8 prefix_length;
 331
 332       if (inner_status_code == DHCPV6_STATUS_NOPREFIX_AVAIL)
 333         {
 334           clib_warning
 335             ("Advertise message arrived with NoPrefixAvail status code");
 336           return 0;
 337         }
 338
 339       if (n_prefixes > 0)
 340         vec_validate (prefix_list, n_prefixes - 1);
 341       for (i = 0; i < n_prefixes; i++)
 342         {
 343           api_prefix = &mp->prefixes[i];
 344           prefix = (ip6_address_t *) api_prefix->prefix.address;
 345           prefix_length = api_prefix->prefix.len;
 346
 347           prefix_info = &prefix_list[i];
 348           prefix_info->prefix = *prefix;
 349           prefix_info->prefix_length = prefix_length;
 350           prefix_info->preferred_lt = 0;
 351           prefix_info->valid_lt = 0;
 352         }
 353
 354       client_state->server_index = server_index;
 355
 356       send_client_message_start_stop (sw_if_index, server_index,
 357                                       DHCPV6_MSG_REQUEST, prefix_list, 1);
 358       vec_free (prefix_list);
 359     }
 360
 361   if (mp->msg_type != DHCPV6_MSG_API_REPLY)
 362     return 0;
 363
 364   if (!client_state->rebinding && client_state->server_index != server_index)
 365     {
 366       clib_warning ("Reply message arrived with Server ID different "
 367                     "from that in Request or Renew message");
 368       return 0;
 369     }
 370
 371   if (inner_status_code == DHCPV6_STATUS_NOPREFIX_AVAIL)
 372     {
 373       clib_warning ("Reply message arrived with NoPrefixAvail status code");
 374       if (n_prefixes > 0)
 375         {
 376           clib_warning
 377             ("Invalid Reply message arrived: It contains NoPrefixAvail "
 378              "status code but also contains prefixes");
 379           return 0;
 380         }
 381     }
 382
 383   if (status_code == DHCPV6_STATUS_UNSPEC_FAIL)
 384     {
 385       clib_warning ("Reply message arrived with UnspecFail status code");
 386       return 0;
 387     }
 388
 389   send_client_message_start_stop (sw_if_index, server_index,
 390                                   mp->msg_type, 0, 0);
 391
 392   for (i = 0; i < n_prefixes; i++)
 393     {
 394       prefix_info_t *prefix_info = 0;
 395       u8 prefix_length;
 396       u32 valid_time;
 397       u32 preferred_time;
 398
 399       api_prefix = &mp->prefixes[i];
 400
 401       prefix = (ip6_address_t *) api_prefix->prefix.address;
 402       prefix_length = api_prefix->prefix.len;
 403
 404       if (ip6_address_is_link_local_unicast (prefix))
 405         continue;
 406
 407       valid_time = ntohl (api_prefix->valid_time);
 408       preferred_time = ntohl (api_prefix->preferred_time);
 409       prefix_length = api_prefix->prefix.len;
 410
 411       if (preferred_time > valid_time)
 412         continue;
 413
 414       u8 address_prefix_present = 0;
 415       /* *INDENT-OFF* */
 416       pool_foreach (prefix_info, pm->prefix_pool,
 417       ({
 418         if (is_dhcpv6_pd_prefix (prefix_info) &&
 419             prefix_info->opaque_data == sw_if_index &&
 420             prefix_info->prefix_length == prefix_length &&
 421             ip6_prefixes_equal (&prefix_info->prefix, prefix, prefix_length))
 422           {
 423             address_prefix_present = 1;
 424             goto prefix_pool_foreach_out;
 425           }
 426       }));
 427       /* *INDENT-ON* */
 428     prefix_pool_foreach_out:
 429
 430       if (address_prefix_present)
 431         {
 432           prefix_info->preferred_lt = preferred_time;
 433           prefix_info->valid_lt = valid_time;
 434           prefix_info->due_time = current_time + valid_time;
 435           if (prefix_info->due_time > rm->max_valid_due_time)
 436             rm->max_valid_due_time = prefix_info->due_time;
 437           continue;
 438         }
 439
 440       if (valid_time == 0)
 441         continue;
 442
 443       pool_get (pm->prefix_pool, prefix_info);
 444       prefix_info->prefix_group_index = client_state->prefix_group_index;
 445       set_is_dhcpv6_pd_prefix (prefix_info, 1);
 446       prefix_info->opaque_data = sw_if_index;
 447       prefix_info->prefix_length = prefix_length;
 448       prefix_info->prefix = *prefix;
 449       prefix_info->preferred_lt = preferred_time;
 450       prefix_info->valid_lt = valid_time;
 451       prefix_info->due_time = current_time + valid_time;
 452       if (prefix_info->due_time > rm->max_valid_due_time)
 453         rm->max_valid_due_time = prefix_info->due_time;
 454       rm->client_state_by_sw_if_index[sw_if_index].prefix_count++;
 455
 456       u32 prefix_index = prefix_info - pm->prefix_pool;
 457       notify_prefix_add_del (prefix_index, 1);
 458     }
 459
 460   client_state->server_index = server_index;
 461   client_state->T1 = ntohl (mp->T1);
 462   client_state->T2 = ntohl (mp->T2);
 463   if (client_state->T1 != 0)
 464     client_state->T1_due_time = current_time + client_state->T1;
 465   if (client_state->T2 != 0)
 466     client_state->T2_due_time = current_time + client_state->T2;
 467   client_state->rebinding = 0;
 468
 469   interrupt_process ();
 470
 471   return error;
 472 }
 473
 474 static prefix_info_t *
 475 create_prefix_list (u32 sw_if_index)
 476 {
 477   ip6_prefix_main_t *pm = &ip6_prefix_main;
 478   prefix_info_t *prefix_info, *prefix_list = 0;;
 479
 480   /* *INDENT-OFF* */
 481   pool_foreach (prefix_info, pm->prefix_pool,
 482   ({
 483     if (is_dhcpv6_pd_prefix (prefix_info) &&
 484         prefix_info->opaque_data == sw_if_index)
 485       {
 486         u32 pos = vec_len (prefix_list);
 487         vec_validate (prefix_list, pos);
 488         clib_memcpy (&prefix_list[pos], prefix_info, sizeof (*prefix_info));
 489       }
 490   }));
 491   /* *INDENT-ON* */
 492
 493   return prefix_list;
 494 }
 495
 496 VNET_DHCP6_PD_REPLY_EVENT_FUNCTION (dhcp6_pd_reply_event_handler);
 497
 498 static uword
 499 dhcp6_pd_client_cp_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
 500                             vlib_frame_t * f)
 501 {
 502   dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main;
 503   ip6_prefix_main_t *pm = &ip6_prefix_main;
 504   prefix_info_t *prefix_info;
 505   client_state_t *client_state;
 506   f64 sleep_time = 1e9;
 507   f64 current_time;
 508   f64 due_time;
 509   uword event_type;
 510   uword *event_data = 0;
 511   int i;
 512
 513   while (1)
 514     {
 515       vlib_process_wait_for_event_or_clock (vm, sleep_time);
 516       event_type = vlib_process_get_events (vm, &event_data);
 517       vec_reset_length (event_data);
 518
 519       if (event_type == DHCPV6_PD_EVENT_DISABLE)
 520         {
 521           vlib_node_set_state (vm, rm->node_index, VLIB_NODE_STATE_DISABLED);
 522           sleep_time = 1e9;
 523           continue;
 524         }
 525
 526       current_time = vlib_time_now (vm);
 527       do
 528         {
 529           due_time = current_time + 1e9;
 530           /* *INDENT-OFF* */
 531           pool_foreach (prefix_info, pm->prefix_pool,
 532           ({
 533             if (is_dhcpv6_pd_prefix (prefix_info))
 534               {
 535                 if (prefix_info->due_time > current_time)
 536                   {
 537                     if (prefix_info->due_time < due_time)
 538                       due_time = prefix_info->due_time;
 539                   }
 540                 else
 541                   {
 542                     u32 prefix_index = prefix_info - pm->prefix_pool;
 543                     notify_prefix_add_del (prefix_index, 0);
 544                     u32 sw_if_index = prefix_info->opaque_data;
 545                     set_is_dhcpv6_pd_prefix (prefix_info, 0);
 546                     pool_put (pm->prefix_pool, prefix_info);
 547                     client_state = &rm->client_state_by_sw_if_index[sw_if_index];
 548                     if (--client_state->prefix_count == 0)
 549                       {
 550                         client_state->rebinding = 0;
 551                         client_state->server_index = ~0;
 552                         send_client_message_start_stop (sw_if_index, ~0,
 553                                                         DHCPV6_MSG_SOLICIT,
 554                                                         0, 1);
 555                       }
 556                   }
 557               }
 558           }));
 559           /* *INDENT-ON* */
 560           for (i = 0; i < vec_len (rm->client_state_by_sw_if_index); i++)
 561             {
 562               client_state_t *cs = &rm->client_state_by_sw_if_index[i];
 563               if (cs->enabled && cs->server_index != ~0)
 564                 {
 565                   if (cs->T2_due_time > current_time)
 566                     {
 567                       if (cs->T2_due_time < due_time)
 568                         due_time = cs->T2_due_time;
 569                       if (cs->T1_due_time > current_time)
 570                         {
 571                           if (cs->T1_due_time < due_time)
 572                             due_time = cs->T1_due_time;
 573                         }
 574                       else
 575                         {
 576                           cs->T1_due_time = DBL_MAX;
 577                           prefix_info_t *prefix_list;
 578                           prefix_list = create_prefix_list (i);
 579                           send_client_message_start_stop (i, cs->server_index,
 580                                                           DHCPV6_MSG_RENEW,
 581                                                           prefix_list, 1);
 582                           vec_free (prefix_list);
 583                         }
 584                     }
 585                   else
 586                     {
 587                       cs->T2_due_time = DBL_MAX;
 588                       prefix_info_t *prefix_list;
 589                       prefix_list = create_prefix_list (i);
 590                       cs->rebinding = 1;
 591                       send_client_message_start_stop (i, ~0,
 592                                                       DHCPV6_MSG_REBIND,
 593                                                       prefix_list, 1);
 594                       vec_free (prefix_list);
 595                     }
 596                 }
 597             }
 598           current_time = vlib_time_now (vm);
 599         }
 600       while (due_time < current_time);
 601
 602       sleep_time = due_time - current_time;
 603     }
 604
 605   return 0;
 606 }
 607
 608 /* *INDENT-OFF* */
 609 VLIB_REGISTER_NODE (dhcp6_pd_client_cp_process_node) = {
 610     .function = dhcp6_pd_client_cp_process,
 611     .type = VLIB_NODE_TYPE_PROCESS,
 612     .name = "dhcp6-pd-client-cp-process",
 613 };
 614 /* *INDENT-ON* */
 615
 616 static void
 617 interrupt_process (void)
 618 {
 619   dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main;
 620   vlib_main_t *vm = rm->vlib_main;
 621
 622   vlib_process_signal_event (vm, dhcp6_pd_client_cp_process_node.index,
 623                              DHCPV6_PD_EVENT_INTERRUPT, 0);
 624 }
 625
 626 static void
 627 disable_process (void)
 628 {
 629   dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main;
 630   vlib_main_t *vm = rm->vlib_main;
 631
 632   vlib_process_signal_event (vm, dhcp6_pd_client_cp_process_node.index,
 633                              DHCPV6_PD_EVENT_DISABLE, 0);
 634 }
 635
 636 static void
 637 enable_process (void)
 638 {
 639   dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main;
 640   vlib_main_t *vm = rm->vlib_main;
 641   vlib_node_t *node;
 642
 643   node = vec_elt (vm->node_main.nodes, rm->node_index);
 644
 645   vlib_node_set_state (vm, rm->node_index, VLIB_NODE_STATE_POLLING);
 646   vlib_start_process (vm, node->runtime_index);
 647 }
 648
 649 static u32
 650 cp_ip6_construct_address (ip6_address_info_t * address_info, u32 prefix_index,
 651                           ip6_address_t * r_addr)
 652 {
 653   ip6_prefix_main_t *pm = &ip6_prefix_main;
 654   prefix_info_t *prefix;
 655   u64 mask, addr0, pref;
 656
 657   addr0 = clib_net_to_host_u64 (address_info->address.as_u64[0]);
 658   prefix = &pm->prefix_pool[prefix_index];
 659   if (prefix->prefix_length > 64)
 660     {
 661       clib_warning ("Prefix length is bigger that 64 bits");
 662       return 1;
 663     }
 664   mask = ((u64) 1 << (64 - prefix->prefix_length)) - 1;
 665   addr0 &= mask;
 666   pref = clib_host_to_net_u64 (prefix->prefix.as_u64[0]);
 667   pref &= ~mask;
 668   addr0 |= pref;
 669   r_addr->as_u64[0] = clib_host_to_net_u64 (addr0);
 670   r_addr->as_u64[1] = address_info->address.as_u64[1];
 671
 672   return 0;
 673 }
 674
 675 static void
 676 cp_ip6_address_add_del_now (ip6_address_info_t * address_info, u8 is_add)
 677 {
 678   vlib_main_t *vm = vlib_get_main ();
 679   u32 prefix_index;
 680   ip6_address_t addr;
 681   clib_error_t *error;
 682
 683   if (address_info->prefix_group_index != ~0)
 684     prefix_index =
 685       active_prefix_index_by_prefix_group_index_get
 686       (address_info->prefix_group_index);
 687   else
 688     prefix_index = ~0;
 689
 690   if (is_add && !address_info->configured_in_data_plane)
 691     {
 692       if (prefix_index != ~0)
 693         {
 694           if (cp_ip6_construct_address (address_info, prefix_index, &addr) !=
 695               0)
 696             return;
 697           error =
 698             ip6_add_del_interface_address (vm, address_info->sw_if_index,
 699                                            &addr, address_info->prefix_length,
 700                                            0 /* add */ );
 701           if (error)
 702             clib_warning ("Failed adding IPv6 address: %U",
 703                           format_clib_error, error);
 704           else
 705             address_info->configured_in_data_plane = 1;
 706         }
 707       else
 708         {
 709           if (address_info->prefix_group_index == ~0)
 710             {
 711               error =
 712                 ip6_add_del_interface_address (vm, address_info->sw_if_index,
 713                                                &address_info->address,
 714                                                address_info->prefix_length,
 715                                                0 /* add */ );
 716               if (error)
 717                 clib_warning ("Failed adding IPv6 address: %U",
 718                               format_clib_error, error);
 719               else
 720                 address_info->configured_in_data_plane = 1;
 721             }
 722         }
 723     }
 724   else if (!is_add && address_info->configured_in_data_plane)
 725     {
 726       if (prefix_index == ~0)
 727         {
 728           if (address_info->prefix_group_index == ~0)
 729             {
 730               error =
 731                 ip6_add_del_interface_address (vm, address_info->sw_if_index,
 732                                                &address_info->address,
 733                                                address_info->prefix_length,
 734                                                1 /* del */ );
 735               if (error)
 736                 clib_warning ("Failed deleting IPv6 address: %U",
 737                               format_clib_error, error);
 738               address_info->configured_in_data_plane = 0;
 739             }
 740           else
 741             clib_warning ("Deleting address with prefix "
 742                           "but active prefix index is not set");
 743         }
 744       else
 745         {
 746           if (cp_ip6_construct_address (address_info, prefix_index, &addr) !=
 747               0)
 748             return;
 749           error =
 750             ip6_add_del_interface_address (vm, address_info->sw_if_index,
 751                                            &addr, address_info->prefix_length,
 752                                            1 /* del */ );
 753           if (error)
 754             clib_warning ("Failed deleting IPv6 address: %U",
 755                           format_clib_error, error);
 756           address_info->configured_in_data_plane = 0;
 757         }
 758     }
 759 }
 760
 761 static u32
 762 cp_ip6_address_find_new_active_prefix (u32 prefix_group_index,
 763                                        u32 ignore_prefix_index)
 764 {
 765   ip6_prefix_main_t *pm = &ip6_prefix_main;
 766   prefix_info_t *prefix_info;
 767
 768   /* *INDENT-OFF* */
 769   pool_foreach (prefix_info, pm->prefix_pool,
 770   ({
 771     if (prefix_info->prefix_group_index == prefix_group_index &&
 772         prefix_info - pm->prefix_pool != ignore_prefix_index)
 773         return prefix_info - pm->prefix_pool;
 774   }));
 775   /* *INDENT-ON* */
 776   return ~0;
 777 }
 778
 779 static void
 780 cp_ip6_address_prefix_add_del_handler (u32 prefix_index, u8 is_add)
 781 {
 782   ip6_address_with_prefix_main_t *apm = &ip6_address_with_prefix_main;
 783   ip6_prefix_main_t *pm = &ip6_prefix_main;
 784   ip6_address_info_t *address_info;
 785   prefix_info_t *prefix;
 786   u32 new_prefix_index;
 787   u32 prefix_group_index;
 788   u32 i;
 789
 790   prefix = &pm->prefix_pool[prefix_index];
 791   prefix_group_index = prefix->prefix_group_index;
 792
 793   if (is_add)
 794     {
 795       if (active_prefix_index_by_prefix_group_index_get
 796           (prefix_group_index) == ~0)
 797         {
 798           active_prefix_index_by_prefix_group_index_set
 799             (prefix_group_index, prefix_index);
 800           for (i = 0; i < vec_len (apm->addresses); i++)
 801             {
 802               address_info = &apm->addresses[i];
 803               if (address_info->prefix_group_index == prefix_group_index)
 804                 cp_ip6_address_add_del_now (address_info, 1 /* add */ );
 805             }
 806         }
 807     }
 808   else
 809     {
 810       if (active_prefix_index_by_prefix_group_index_get
 811           (prefix_group_index) == prefix_index)
 812         {
 813           for (i = 0; i < vec_len (apm->addresses); i++)
 814             {
 815               address_info = &apm->addresses[i];
 816               if (address_info->prefix_group_index == prefix_group_index)
 817                 cp_ip6_address_add_del_now (address_info, 0 /* del */ );
 818             }
 819           active_prefix_index_by_prefix_group_index_set
 820             (prefix_group_index, ~0);
 821           new_prefix_index =
 822             cp_ip6_address_find_new_active_prefix (prefix_group_index,
 823                                                    prefix_index);
 824           if (new_prefix_index != ~0)
 825             {
 826               active_prefix_index_by_prefix_group_index_set
 827                 (prefix_group_index, new_prefix_index);
 828               for (i = 0; i < vec_len (apm->addresses); i++)
 829                 {
 830                   address_info = &apm->addresses[i];
 831                   if (address_info->prefix_group_index == prefix_group_index)
 832                     cp_ip6_address_add_del_now (address_info, 1 /* add */ );
 833                 }
 834             }
 835         }
 836     }
 837 }
 838
 839 static u32
 840 prefix_group_find_or_create (const u8 * name, u8 create)
 841 {
 842   ip6_prefix_main_t *pm = &ip6_prefix_main;
 843   u32 free_index = ~0;
 844   u8 *name_dup;
 845   u32 i;
 846
 847   for (i = 0; i < vec_len (pm->prefix_group_name_by_index); i++)
 848     {
 849       if (pm->prefix_group_name_by_index[i] == 0)
 850         free_index = i;
 851       else if (0 ==
 852                strcmp ((const char *) pm->prefix_group_name_by_index[i],
 853                        (const char *) name))
 854         return i;
 855     }
 856   if (!create)
 857     return ~0;
 858   name_dup = (u8 *) strdup ((const char *) name);
 859   if (free_index != ~0)
 860     {
 861       pm->prefix_group_name_by_index[free_index] = name_dup;
 862       return free_index;
 863     }
 864   else
 865     {
 866       vec_add1 (pm->prefix_group_name_by_index, name_dup);
 867       return vec_len (pm->prefix_group_name_by_index) - 1;
 868     }
 869 }
 870
 871 static int
 872 cp_ip6_address_add_del (u32 sw_if_index, const u8 * prefix_group,
 873                         ip6_address_t address, u8 prefix_length, u8 is_add)
 874 {
 875
 876   ip6_address_with_prefix_main_t *apm = &ip6_address_with_prefix_main;
 877   vnet_main_t *vnm = vnet_get_main ();
 878   ip6_address_info_t *address_info;
 879   u32 prefix_group_index;
 880   u32 n;
 881
 882   if (!vnet_sw_interface_is_api_valid (vnm, sw_if_index))
 883     {
 884       clib_warning ("Invalid sw_if_index");
 885       return VNET_API_ERROR_INVALID_VALUE;
 886     }
 887
 888   if (prefix_group != 0 && prefix_group[0] != '\0')
 889     {
 890       if (strnlen ((const char *) prefix_group, 64) == 64)
 891         return VNET_API_ERROR_INVALID_VALUE;
 892
 893       prefix_group_index = prefix_group_find_or_create (prefix_group, 1);
 894     }
 895   else
 896     prefix_group_index = ~0;
 897
 898   n = vec_len (apm->addresses);
 899
 900   vec_foreach (address_info, apm->addresses)
 901   {
 902     if (address_info->sw_if_index == sw_if_index &&
 903         address_info->prefix_group_index == prefix_group_index &&
 904         address_info->prefix_length == prefix_length &&
 905         0 == memcmp (&address_info->address, &address, 16))
 906       {
 907         if (is_add)
 908           return VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
 909         cp_ip6_address_add_del_now (address_info, 0 /* del */ );
 910         *address_info = apm->addresses[n - 1];
 911         _vec_len (apm->addresses) = n - 1;
 912         return 0;
 913       }
 914   }
 915
 916   if (!is_add)
 917     return VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
 918
 919   vec_validate (apm->addresses, n);
 920   address_info = &apm->addresses[n];
 921   address_info->sw_if_index = sw_if_index;
 922   address_info->prefix_group_index = prefix_group_index;
 923   address_info->address = address;
 924   address_info->prefix_length = prefix_length;
 925   cp_ip6_address_add_del_now (address_info, 1 /* add */ );
 926
 927   return 0;
 928 }
 929
 930 static void
 931   vl_api_ip6_add_del_address_using_prefix_t_handler
 932   (vl_api_ip6_add_del_address_using_prefix_t * mp)
 933 {
 934   vl_api_ip6_add_del_address_using_prefix_reply_t *rmp;
 935   u32 sw_if_index;
 936   ip6_address_t address;
 937   u8 prefix_length;
 938   int rv = 0;
 939
 940   VALIDATE_SW_IF_INDEX (mp);
 941
 942   sw_if_index = ntohl (mp->sw_if_index);
 943
 944   memcpy (address.as_u8, mp->address, 16);
 945   prefix_length = mp->prefix_length;
 946
 947   rv =
 948     cp_ip6_address_add_del (sw_if_index, mp->prefix_group, address,
 949                             prefix_length, mp->is_add);
 950
 951   BAD_SW_IF_INDEX_LABEL;
 952
 953   REPLY_MACRO (VL_API_IP6_ADD_DEL_ADDRESS_USING_PREFIX_REPLY);
 954 }
 955
 956 static clib_error_t *
 957 cp_ip6_address_add_del_command_function (vlib_main_t * vm,
 958                                          unformat_input_t * input,
 959                                          vlib_cli_command_t * cmd)
 960 {
 961   vnet_main_t *vnm = vnet_get_main ();
 962   clib_error_t *error = 0;
 963   u32 sw_if_index = ~0;
 964   u8 *prefix_group = 0;
 965   ip6_address_t address;
 966   u32 prefix_length;
 967   u8 address_set = 0;
 968   u8 add = 1;
 969   unformat_input_t _line_input, *line_input = &_line_input;
 970
 971   if (!unformat_user (input, unformat_line_input, line_input))
 972     return 0;
 973
 974   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
 975     {
 976       if (unformat
 977           (line_input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index));
 978       else if (unformat (line_input, "prefix group %s", &prefix_group));
 979       else
 980         if (unformat (line_input, "%U/%d", unformat_ip6_address,
 981                       &address, &prefix_length))
 982         address_set = 1;
 983       else if (unformat (line_input, "del"))
 984         add = 0;
 985       else
 986         {
 987           error = clib_error_return (0, "unexpected input `%U'",
 988                                      format_unformat_error, line_input);
 989           unformat_free (line_input);
 990           goto done;
 991         }
 992     }
 993
 994   unformat_free (line_input);
 995
 996   if (sw_if_index == ~0)
 997     error = clib_error_return (0, "Missing sw_if_index");
 998   else if (address_set == 0)
 999     error = clib_error_return (0, "Missing address");
1000   else
1001     {
1002       if (cp_ip6_address_add_del
1003           (sw_if_index, prefix_group, address, prefix_length, add) != 0)
1004         error = clib_error_return (0, "Error adding or removing address");
1005     }
1006
1007 done:
1008   return error;
1009 }
1010
1011 /*?
1012  * This command is used to add/delete IPv6 address
1013  * potentially using available prefix from specified prefix group
1014  *
1015  * @cliexpar
1016  * @parblock
1017  * Example of how to add IPv6 address:
1018  * @cliexcmd{set ip6 address GigabitEthernet2/0/0
1019  *           prefix group my-prefix-group ::7/64}
1020  * Example of how to delete IPv6 address:
1021  * @cliexcmd{set ip6 address GigabitEthernet2/0/0
1022  *           prefix group my-prefix-group ::7/64 del}
1023  * @endparblock
1024 ?*/
1025 /* *INDENT-OFF* */
1026 VLIB_CLI_COMMAND (ip6_address_add_del_command, static) = {
1027   .path = "set ip6 address",
1028   .short_help = "set ip6 address <interface> [prefix group <string>] "
1029                 "<address> [del]",
1030   .function = cp_ip6_address_add_del_command_function,
1031 };
1032 /* *INDENT-ON* */
1033
1034 static clib_error_t *
1035 cp_ip6_addresses_show_command_function (vlib_main_t * vm,
1036                                         unformat_input_t * input,
1037                                         vlib_cli_command_t * cmd)
1038 {
1039   ip6_address_with_prefix_main_t *apm = &ip6_address_with_prefix_main;
1040   ip6_prefix_main_t *pm = &ip6_prefix_main;
1041   ip6_address_info_t *address_info;
1042   const u8 *prefix_group;
1043   clib_error_t *error = 0;
1044   int i;
1045
1046   for (i = 0; i < vec_len (apm->addresses); i++)
1047     {
1048       address_info = &apm->addresses[i];
1049       if (address_info->prefix_group_index == ~0)
1050         prefix_group = (const u8 *) "NONE";
1051       else
1052         prefix_group =
1053           pm->prefix_group_name_by_index[address_info->prefix_group_index];
1054       vlib_cli_output (vm,
1055                        "sw_if_index: %u, prefix_group: %s, address: %U/%d",
1056                        address_info->sw_if_index, prefix_group,
1057                        format_ip6_address, &address_info->address,
1058                        address_info->prefix_length);
1059     }
1060
1061   return error;
1062 }
1063
1064 /* *INDENT-OFF* */
1065 VLIB_CLI_COMMAND (ip6_addresses_show_command, static) = {
1066   .path = "show ip6 addresses",
1067   .short_help = "show ip6 addresses",
1068   .function = cp_ip6_addresses_show_command_function,
1069 };
1070 /* *INDENT-ON* */
1071
1072 static clib_error_t *
1073 cp_ip6_prefixes_show_command_function (vlib_main_t * vm,
1074                                        unformat_input_t * input,
1075                                        vlib_cli_command_t * cmd)
1076 {
1077   ip6_prefix_main_t *pm = &ip6_prefix_main;
1078   clib_error_t *error = 0;
1079   prefix_info_t *prefix_info;
1080   const u8 *prefix_group;
1081   f64 current_time = vlib_time_now (vm);
1082
1083   /* *INDENT-OFF* */
1084   pool_foreach (prefix_info, pm->prefix_pool,
1085   ({
1086     prefix_group =
1087       pm->prefix_group_name_by_index[prefix_info->prefix_group_index];
1088     vlib_cli_output (vm, "opaque_data: %lu, prefix: %U/%d, prefix group: %s, "
1089                      "preferred lifetime: %u, valid lifetime: %u "
1090                      "(%f remaining)",
1091                      prefix_info->opaque_data, format_ip6_address,
1092                      &prefix_info->prefix, prefix_info->prefix_length,
1093                      prefix_group,
1094                      prefix_info->preferred_lt, prefix_info->valid_lt,
1095                      prefix_info->due_time - current_time);
1096   }));
1097   /* *INDENT-ON* */
1098
1099   return error;
1100 }
1101
1102 /* *INDENT-OFF* */
1103 VLIB_CLI_COMMAND (ip6_prefixes_show_command, static) = {
1104   .path = "show ip6 prefixes",
1105   .short_help = "show ip6 prefixes",
1106   .function = cp_ip6_prefixes_show_command_function,
1107 };
1108 /* *INDENT-ON* */
1109
1110 static clib_error_t *
1111 ip6_pd_clients_show_command_function (vlib_main_t * vm,
1112                                       unformat_input_t * input,
1113                                       vlib_cli_command_t * cmd)
1114 {
1115   dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main;
1116   ip6_prefix_main_t *pm = &ip6_prefix_main;
1117   clib_error_t *error = 0;
1118   client_state_t *cs;
1119   f64 current_time = vlib_time_now (vm);
1120   const u8 *prefix_group;
1121   char buf1[256];
1122   char buf2[256];
1123   const char *rebinding;
1124   u32 i;
1125
1126   for (i = 0; i < vec_len (rm->client_state_by_sw_if_index); i++)
1127     {
1128       cs = &rm->client_state_by_sw_if_index[i];
1129       if (cs->enabled)
1130         {
1131           if (cs->T1_due_time != DBL_MAX && cs->T1_due_time > current_time)
1132             {
1133               sprintf (buf1, "%u remaining",
1134                        (u32) round (cs->T1_due_time - current_time));
1135             }
1136           else
1137             sprintf (buf1, "timeout");
1138           if (cs->T2_due_time != DBL_MAX && cs->T2_due_time > current_time)
1139             sprintf (buf2, "%u remaining",
1140                      (u32) round (cs->T2_due_time - current_time));
1141           else
1142             sprintf (buf2, "timeout");
1143           if (cs->rebinding)
1144             rebinding = ", REBINDING";
1145           else
1146             rebinding = "";
1147           prefix_group =
1148             pm->prefix_group_name_by_index[cs->prefix_group_index];
1149           if (cs->T1)
1150             vlib_cli_output (vm,
1151                              "sw_if_index: %u, prefix group: %s, T1: %u (%s), "
1152                              "T2: %u (%s), server index: %d%s", i,
1153                              prefix_group, cs->T1, buf1, cs->T2, buf2,
1154                              cs->server_index, rebinding);
1155           else
1156             vlib_cli_output (vm, "sw_if_index: %u, prefix group: %s%s", i,
1157                              prefix_group, rebinding);
1158         }
1159     }
1160
1161   return error;
1162 }
1163
1164 /* *INDENT-OFF* */
1165 VLIB_CLI_COMMAND (ip6_pd_clients_show_command, static) = {
1166   .path = "show ip6 pd clients",
1167   .short_help = "show ip6 pd clients",
1168   .function = ip6_pd_clients_show_command_function,
1169 };
1170 /* *INDENT-ON* */
1171
1172 static int
1173 dhcp6_pd_client_enable_disable (u32 sw_if_index, const u8 * prefix_group,
1174                                 u8 enable)
1175 {
1176   dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main;
1177   ip6_prefix_main_t *pm = &ip6_prefix_main;
1178   vnet_main_t *vnm = rm->vnet_main;
1179   client_state_t *client_state;
1180   static client_state_t empty_config = {
1181     0
1182   };
1183   prefix_info_t *prefix_info;
1184   prefix_info_t *prefix_list = 0;
1185   u32 prefix_group_index;
1186
1187   if (!vnet_sw_interface_is_api_valid (vnm, sw_if_index))
1188     {
1189       clib_warning ("Invalid sw_if_index");
1190       return VNET_API_ERROR_INVALID_VALUE;
1191     }
1192
1193   vec_validate_init_empty (rm->client_state_by_sw_if_index, sw_if_index,
1194                            empty_config);
1195   client_state = &rm->client_state_by_sw_if_index[sw_if_index];
1196
1197   u8 old_enabled = client_state->enabled;
1198
1199   if (enable)
1200     {
1201       if (strnlen ((const char *) prefix_group, 64) == 64
1202           || prefix_group[0] == '\0')
1203         return VNET_API_ERROR_INVALID_VALUE;
1204       prefix_group_index =
1205         prefix_group_find_or_create (prefix_group, !old_enabled);
1206       if (old_enabled
1207           && prefix_group_index != client_state->prefix_group_index)
1208         return VNET_API_ERROR_INVALID_VALUE;
1209     }
1210
1211   if (!old_enabled && enable)
1212     {
1213       client_state->enabled = 1;
1214       client_state->prefix_group_index = prefix_group_index;
1215       ASSERT (client_state->prefix_group_index != ~0);
1216       client_state->server_index = ~0;
1217
1218       rm->n_clients++;
1219       if (rm->n_clients == 1)
1220         {
1221           enable_process ();
1222           dhcp6_clients_enable_disable (1);
1223         }
1224
1225       ip6_enable (sw_if_index);
1226       send_client_message_start_stop (sw_if_index, ~0, DHCPV6_MSG_SOLICIT,
1227                                       0, 1);
1228     }
1229   else if (old_enabled && !enable)
1230     {
1231       send_client_message_start_stop (sw_if_index, ~0, ~0, 0, 0);
1232
1233       rm->n_clients--;
1234       if (rm->n_clients == 0)
1235         {
1236           dhcp6_clients_enable_disable (0);
1237           disable_process ();
1238         }
1239
1240       vec_validate (prefix_list, 0);
1241
1242       /* *INDENT-OFF* */
1243       pool_foreach (prefix_info, pm->prefix_pool,
1244       ({
1245         if (is_dhcpv6_pd_prefix (prefix_info) &&
1246             prefix_info->opaque_data == sw_if_index)
1247           {
1248             ASSERT (sw_if_index < vec_len (rm->client_state_by_sw_if_index) &&
1249                     rm->client_state_by_sw_if_index[sw_if_index].enabled);
1250             client_state_t *client_state =
1251               &rm->client_state_by_sw_if_index[sw_if_index];
1252             prefix_list[0] = *prefix_info;
1253             send_client_message_start_stop (sw_if_index,
1254                                             client_state->server_index,
1255                                             DHCPV6_MSG_RELEASE, prefix_list,
1256                                             1);
1257             u32 prefix_index = prefix_info - pm->prefix_pool;
1258             notify_prefix_add_del (prefix_index, 0);
1259             set_is_dhcpv6_pd_prefix (prefix_info, 0);
1260             pool_put (pm->prefix_pool, prefix_info);
1261           }
1262       }));
1263       /* *INDENT-ON* */
1264
1265       vec_free (prefix_list);
1266
1267       clib_memset (client_state, 0, sizeof (*client_state));
1268     }
1269
1270   return 0;
1271 }
1272
1273 static clib_error_t *
1274 dhcp6_pd_client_enable_disable_command_fn (vlib_main_t *
1275                                            vm,
1276                                            unformat_input_t
1277                                            * input, vlib_cli_command_t * cmd)
1278 {
1279   dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main;
1280   vnet_main_t *vnm = rm->vnet_main;
1281   clib_error_t *error = 0;
1282   u8 *prefix_group = 0;
1283   u32 sw_if_index = ~0;
1284   u8 enable = 1;
1285   unformat_input_t _line_input, *line_input = &_line_input;
1286
1287   if (!unformat_user (input, unformat_line_input, line_input))
1288     return 0;
1289
1290   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1291     {
1292       if (unformat
1293           (line_input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
1294         ;
1295       else if (unformat (line_input, "prefix group %s", &prefix_group));
1296       else if (unformat (line_input, "disable"))
1297         enable = 0;
1298       else
1299         {
1300           error = clib_error_return (0, "unexpected input `%U'",
1301                                      format_unformat_error, line_input);
1302           goto done;
1303         }
1304     }
1305
1306   if (prefix_group == 0 && enable)
1307     error = clib_error_return (0, "Prefix group must be set when enabling");
1308   else if (sw_if_index != ~0)
1309     {
1310       if (dhcp6_pd_client_enable_disable (sw_if_index, prefix_group, enable)
1311           != 0)
1312         error = clib_error_return (0, "Invalid sw_if_index or prefix group");
1313     }
1314   else
1315     error = clib_error_return (0, "Missing sw_if_index");
1316
1317 done:
1318   vec_free (prefix_group);
1319   unformat_free (line_input);
1320
1321   return error;
1322 }
1323
1324 /*?
1325  * This command is used to enable/disable DHCPv6 PD client
1326  * on particular interface.
1327  *
1328  * @cliexpar
1329  * @parblock
1330  * Example of how to enable DHCPv6 PD client:
1331  * @cliexcmd{dhcp6 pd client GigabitEthernet2/0/0 prefix group my-pd-group}
1332  * Example of how to disable DHCPv6 PD client:
1333  * @cliexcmd{dhcp6 pd client GigabitEthernet2/0/0 disable}
1334  * @endparblock
1335 ?*/
1336 /* *INDENT-OFF* */
1337 VLIB_CLI_COMMAND (dhcp6_pd_client_enable_disable_command, static) = {
1338   .path = "dhcp6 pd client",
1339   .short_help = "dhcp6 pd client <interface> (prefix group <string> | disable)",
1340   .function = dhcp6_pd_client_enable_disable_command_fn,
1341 };
1342 /* *INDENT-ON* */
1343
1344 static void
1345   vl_api_dhcp6_pd_client_enable_disable_t_handler
1346   (vl_api_dhcp6_pd_client_enable_disable_t * mp)
1347 {
1348   vl_api_dhcp6_pd_client_enable_disable_reply_t *rmp;
1349   u32 sw_if_index;
1350   int rv = 0;
1351
1352   VALIDATE_SW_IF_INDEX (mp);
1353
1354   sw_if_index = ntohl (mp->sw_if_index);
1355
1356   rv =
1357     dhcp6_pd_client_enable_disable (sw_if_index, mp->prefix_group,
1358                                     mp->enable);
1359
1360   BAD_SW_IF_INDEX_LABEL;
1361
1362   REPLY_MACRO (VL_API_DHCP6_PD_CLIENT_ENABLE_DISABLE_REPLY);
1363 }
1364
1365 #define vl_msg_name_crc_list
1366 #include <vnet/dhcp/dhcp6_pd_client_cp.api.h>
1367 #undef vl_msg_name_crc_list
1368
1369 static void
1370 setup_message_id_table (api_main_t * am)
1371 {
1372 #define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
1373   foreach_vl_msg_name_crc_dhcp6_pd_client_cp;
1374 #undef _
1375 }
1376
1377 static clib_error_t *
1378 dhcp_pd_client_cp_init (vlib_main_t * vm)
1379 {
1380   dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main;
1381   api_main_t *am = &api_main;
1382
1383   rm->vlib_main = vm;
1384   rm->vnet_main = vnet_get_main ();
1385   rm->api_main = am;
1386   rm->node_index = dhcp6_pd_client_cp_process_node.index;
1387
1388 #define _(N,n)                                                  \
1389     vl_msg_api_set_handlers(VL_API_##N, #n,                     \
1390                            vl_api_##n##_t_handler,              \
1391                            vl_noop_handler,                     \
1392                            vl_api_##n##_t_endian,               \
1393                            vl_api_##n##_t_print,                \
1394                            sizeof(vl_api_##n##_t), 0/* do NOT trace! */);
1395   foreach_dhcp6_pd_client_cp_msg;
1396 #undef _
1397
1398   /*
1399    * Set up the (msg_name, crc, message-id) table
1400    */
1401   setup_message_id_table (am);
1402
1403   return 0;
1404 }
1405
1406 VLIB_INIT_FUNCTION (dhcp_pd_client_cp_init);
1407
1408 /*
1409  * fd.io coding-style-patch-verification: ON
1410  *
1411  * Local Variables:
1412  * eval: (c-set-style "gnu")
1413  * End:
1414  */