zebra/redistribute.c

   1 /* Redistribution Handler
   2  * Copyright (C) 1998 Kunihiro Ishiguro
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <zebra.h>
  22
  23 #include "vector.h"
  24 #include "vty.h"
  25 #include "command.h"
  26 #include "prefix.h"
  27 #include "table.h"
  28 #include "stream.h"
  29 #include "zclient.h"
  30 #include "linklist.h"
  31 #include "log.h"
  32 #include "vrf.h"
  33 #include "srcdest_table.h"
  34
  35 #include "zebra/rib.h"
  36 #include "zebra/zebra_router.h"
  37 #include "zebra/zebra_ns.h"
  38 #include "zebra/zebra_vrf.h"
  39 #include "zebra/zebra_routemap.h"
  40 #include "zebra/redistribute.h"
  41 #include "zebra/debug.h"
  42 #include "zebra/router-id.h"
  43 #include "zebra/zapi_msg.h"
  44 #include "zebra/zebra_memory.h"
  45 #include "zebra/zebra_vxlan.h"
  46 #include "zebra/zebra_errors.h"
  47
  48 #define ZEBRA_PTM_SUPPORT
  49
  50 /* array holding redistribute info about table redistribution */
  51 /* bit AFI is set if that AFI is redistributing routes from this table */
  52 static int zebra_import_table_used[AFI_MAX][ZEBRA_KERNEL_TABLE_MAX];
  53 static uint32_t zebra_import_table_distance[AFI_MAX][ZEBRA_KERNEL_TABLE_MAX];
  54
  55 int is_zebra_import_table_enabled(afi_t afi, vrf_id_t vrf_id, uint32_t table_id)
  56 {
  57         /*
  58          * Make sure that what we are called with actualy makes sense
  59          */
  60         if (afi == AFI_MAX)
  61                 return 0;
  62
  63         if (is_zebra_valid_kernel_table(table_id) &&
  64             table_id < ZEBRA_KERNEL_TABLE_MAX)
  65                 return zebra_import_table_used[afi][table_id];
  66         return 0;
  67 }
  68
  69 static void zebra_redistribute_default(struct zserv *client, vrf_id_t vrf_id)
  70 {
  71         int afi;
  72         struct prefix p;
  73         struct route_table *table;
  74         struct route_node *rn;
  75         struct route_entry *newre;
  76
  77         for (afi = AFI_IP; afi <= AFI_IP6; afi++) {
  78                 /* Lookup table.  */
  79                 table = zebra_vrf_table(afi, SAFI_UNICAST, vrf_id);
  80                 if (!table)
  81                         continue;
  82
  83                 /* Lookup default route. */
  84                 memset(&p, 0, sizeof(p));
  85                 p.family = afi2family(afi);
  86                 rn = route_node_lookup(table, &p);
  87                 if (!rn)
  88                         continue;
  89
  90                 RNODE_FOREACH_RE (rn, newre) {
  91                         if (CHECK_FLAG(newre->flags, ZEBRA_FLAG_SELECTED)
  92                             && newre->distance != DISTANCE_INFINITY)
  93                                 zsend_redistribute_route(
  94                                         ZEBRA_REDISTRIBUTE_ROUTE_ADD, client,
  95                                         &rn->p, NULL, newre);
  96                 }
  97
  98                 route_unlock_node(rn);
  99         }
 100 }
 101
 102 /* Redistribute routes. */
 103 static void zebra_redistribute(struct zserv *client, int type,
 104                                unsigned short instance, vrf_id_t vrf_id,
 105                                int afi)
 106 {
 107         struct route_entry *newre;
 108         struct route_table *table;
 109         struct route_node *rn;
 110
 111         table = zebra_vrf_table(afi, SAFI_UNICAST, vrf_id);
 112         if (!table)
 113                 return;
 114
 115         for (rn = route_top(table); rn; rn = srcdest_route_next(rn))
 116                 RNODE_FOREACH_RE (rn, newre) {
 117                         const struct prefix *dst_p, *src_p;
 118                         char buf[PREFIX_STRLEN];
 119
 120                         srcdest_rnode_prefixes(rn, &dst_p, &src_p);
 121
 122                         if (IS_ZEBRA_DEBUG_RIB)
 123                                 zlog_debug(
 124                                         "%s: client %s %s(%u) checking: selected=%d, type=%d, distance=%d, metric=%d zebra_check_addr=%d",
 125                                         __func__,
 126                                         zebra_route_string(client->proto),
 127                                         prefix2str(dst_p, buf, sizeof(buf)),
 128                                         vrf_id, CHECK_FLAG(newre->flags,
 129                                                            ZEBRA_FLAG_SELECTED),
 130                                         newre->type, newre->distance,
 131                                         newre->metric, zebra_check_addr(dst_p));
 132
 133                         if (!CHECK_FLAG(newre->flags, ZEBRA_FLAG_SELECTED))
 134                                 continue;
 135                         if ((type != ZEBRA_ROUTE_ALL
 136                              && (newre->type != type
 137                                  || newre->instance != instance)))
 138                                 continue;
 139                         if (newre->distance == DISTANCE_INFINITY)
 140                                 continue;
 141                         if (!zebra_check_addr(dst_p))
 142                                 continue;
 143
 144                         zsend_redistribute_route(ZEBRA_REDISTRIBUTE_ROUTE_ADD,
 145                                                  client, dst_p, src_p, newre);
 146                 }
 147 }
 148
 149 /* Either advertise a route for redistribution to registered clients or */
 150 /* withdraw redistribution if add cannot be done for client */
 151 void redistribute_update(const struct prefix *p, const struct prefix *src_p,
 152                          const struct route_entry *re,
 153                          const struct route_entry *prev_re)
 154 {
 155         struct listnode *node, *nnode;
 156         struct zserv *client;
 157         int send_redistribute;
 158         int afi;
 159         char buf[PREFIX_STRLEN];
 160
 161         if (IS_ZEBRA_DEBUG_RIB) {
 162                 zlog_debug(
 163                         "%u:%s: Redist update re %p (%s), old %p (%s)",
 164                         re->vrf_id, prefix2str(p, buf, sizeof(buf)),
 165                         re, zebra_route_string(re->type), prev_re,
 166                         prev_re ? zebra_route_string(prev_re->type) : "None");
 167         }
 168
 169         afi = family2afi(p->family);
 170         if (!afi) {
 171                 flog_warn(EC_ZEBRA_REDISTRIBUTE_UNKNOWN_AF,
 172                           "%s: Unknown AFI/SAFI prefix received\n",
 173                           __FUNCTION__);
 174                 return;
 175         }
 176         if (!zebra_check_addr(p)) {
 177                 if (IS_ZEBRA_DEBUG_RIB)
 178                         zlog_debug("Redist update filter prefix %s",
 179                                    prefix2str(p, buf, sizeof(buf)));
 180                 return;
 181         }
 182
 183
 184         for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
 185                 send_redistribute = 0;
 186
 187                 if (is_default_prefix(p)
 188                     && vrf_bitmap_check(client->redist_default[afi],
 189                                         re->vrf_id))
 190                         send_redistribute = 1;
 191                 else if (vrf_bitmap_check(client->redist[afi][ZEBRA_ROUTE_ALL],
 192                                           re->vrf_id))
 193                         send_redistribute = 1;
 194                 else if (re->instance
 195                          && redist_check_instance(
 196                                     &client->mi_redist[afi][re->type],
 197                                     re->instance))
 198                         send_redistribute = 1;
 199                 else if (vrf_bitmap_check(client->redist[afi][re->type],
 200                                           re->vrf_id))
 201                         send_redistribute = 1;
 202
 203                 if (send_redistribute) {
 204                         if (IS_ZEBRA_DEBUG_RIB) {
 205                                 zlog_debug(
 206                                            "%s: client %s %s(%u), type=%d, distance=%d, metric=%d",
 207                                            __func__,
 208                                            zebra_route_string(client->proto),
 209                                            prefix2str(p, buf, sizeof(buf)),
 210                                            re->vrf_id, re->type,
 211                                            re->distance, re->metric);
 212                         }
 213                         zsend_redistribute_route(ZEBRA_REDISTRIBUTE_ROUTE_ADD,
 214                                                  client, p, src_p, re);
 215                 } else if (prev_re
 216                            && ((re->instance
 217                                 && redist_check_instance(
 218                                            &client->mi_redist[afi]
 219                                                              [prev_re->type],
 220                                            re->instance))
 221                                || vrf_bitmap_check(
 222                                           client->redist[afi][prev_re->type],
 223                                           re->vrf_id))) {
 224                         zsend_redistribute_route(ZEBRA_REDISTRIBUTE_ROUTE_DEL,
 225                                                  client, p, src_p, prev_re);
 226                 }
 227         }
 228 }
 229
 230 /*
 231  * During a route delete, where 'new_re' is NULL, redist a delete to all
 232  * clients registered for the type of 'old_re'.
 233  * During a route update, redist a delete to any clients who will not see
 234  * an update when the new route is installed. There are cases when a client
 235  * may have seen a redist for 'old_re', but will not see
 236  * the redist for 'new_re'.
 237  */
 238 void redistribute_delete(const struct prefix *p, const struct prefix *src_p,
 239                          const struct route_entry *old_re,
 240                          const struct route_entry *new_re)
 241 {
 242         struct listnode *node, *nnode;
 243         struct zserv *client;
 244         int afi;
 245         char buf[PREFIX_STRLEN];
 246         vrf_id_t vrfid;
 247
 248         if (old_re)
 249                 vrfid = old_re->vrf_id;
 250         else if (new_re)
 251                 vrfid = new_re->vrf_id;
 252         else
 253                 return;
 254
 255         if (IS_ZEBRA_DEBUG_RIB) {
 256                 zlog_debug(
 257                         "%u:%s: Redist del: re %p (%s), new re %p (%s)",
 258                         vrfid, prefix2str(p, buf, sizeof(buf)),
 259                         old_re,
 260                         old_re ? zebra_route_string(old_re->type) : "None",
 261                         new_re,
 262                         new_re ? zebra_route_string(new_re->type) : "None");
 263         }
 264
 265         /* Add DISTANCE_INFINITY check. */
 266         if (old_re && (old_re->distance == DISTANCE_INFINITY))
 267                 return;
 268
 269         afi = family2afi(p->family);
 270         if (!afi) {
 271                 flog_warn(EC_ZEBRA_REDISTRIBUTE_UNKNOWN_AF,
 272                           "%s: Unknown AFI/SAFI prefix received\n",
 273                           __func__);
 274                 return;
 275         }
 276
 277         /* Skip invalid (e.g. linklocal) prefix */
 278         if (!zebra_check_addr(p)) {
 279                 if (IS_ZEBRA_DEBUG_RIB) {
 280                         zlog_debug(
 281                                 "%u:%s: Redist del old: skipping invalid prefix",
 282                                 vrfid, prefix2str(p, buf, sizeof(buf)));
 283                 }
 284                 return;
 285         }
 286
 287         for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
 288                 if (new_re) {
 289                         /* Skip this client if it will receive an update for the
 290                          * 'new' re
 291                          */
 292                         if (is_default_prefix(p)
 293                             && vrf_bitmap_check(client->redist_default[afi],
 294                                                 new_re->vrf_id))
 295                                 continue;
 296                         else if (vrf_bitmap_check(
 297                                          client->redist[afi][ZEBRA_ROUTE_ALL],
 298                                          new_re->vrf_id))
 299                                 continue;
 300                         else if (new_re->instance
 301                                  && redist_check_instance(
 302                                          &client->mi_redist[afi][new_re->type],
 303                                          new_re->instance))
 304                                 continue;
 305                         else if (vrf_bitmap_check(
 306                                          client->redist[afi][new_re->type],
 307                                          new_re->vrf_id))
 308                                 continue;
 309                 }
 310
 311                 /* Send a delete for the 'old' re to any subscribed client. */
 312                 if (old_re
 313                     && ((old_re->instance
 314                          && redist_check_instance(
 315                                  &client->mi_redist[afi]
 316                                  [old_re->type],
 317                                  old_re->instance))
 318                         || vrf_bitmap_check(
 319                                 client->redist[afi][old_re->type],
 320                                 old_re->vrf_id))) {
 321                         zsend_redistribute_route(ZEBRA_REDISTRIBUTE_ROUTE_DEL,
 322                                                  client, p, src_p, old_re);
 323                 }
 324         }
 325 }
 326
 327 void zebra_redistribute_add(ZAPI_HANDLER_ARGS)
 328 {
 329         afi_t afi = 0;
 330         int type = 0;
 331         unsigned short instance;
 332
 333         STREAM_GETC(msg, afi);
 334         STREAM_GETC(msg, type);
 335         STREAM_GETW(msg, instance);
 336
 337         if (IS_ZEBRA_DEBUG_EVENT)
 338                 zlog_debug(
 339                         "%s: client proto %s afi=%d, wants %s, vrf %u, instance=%d",
 340                         __func__, zebra_route_string(client->proto), afi,
 341                         zebra_route_string(type), zvrf_id(zvrf), instance);
 342
 343         if (afi == 0 || afi >= AFI_MAX) {
 344                 flog_warn(EC_ZEBRA_REDISTRIBUTE_UNKNOWN_AF,
 345                           "%s: Specified afi %d does not exist",
 346                           __PRETTY_FUNCTION__, afi);
 347                 return;
 348         }
 349
 350         if (type == 0 || type >= ZEBRA_ROUTE_MAX) {
 351                 zlog_debug("%s: Specified Route Type %d does not exist",
 352                            __PRETTY_FUNCTION__, type);
 353                 return;
 354         }
 355
 356         if (instance) {
 357                 if (!redist_check_instance(&client->mi_redist[afi][type],
 358                                            instance)) {
 359                         redist_add_instance(&client->mi_redist[afi][type],
 360                                             instance);
 361                         zebra_redistribute(client, type, instance,
 362                                            zvrf_id(zvrf), afi);
 363                 }
 364         } else {
 365                 if (!vrf_bitmap_check(client->redist[afi][type],
 366                                       zvrf_id(zvrf))) {
 367                         if (IS_ZEBRA_DEBUG_EVENT)
 368                                 zlog_debug("%s: setting vrf %u redist bitmap",
 369                                            __func__, zvrf_id(zvrf));
 370                         vrf_bitmap_set(client->redist[afi][type],
 371                                        zvrf_id(zvrf));
 372                         zebra_redistribute(client, type, 0, zvrf_id(zvrf), afi);
 373                 }
 374         }
 375
 376 stream_failure:
 377         return;
 378 }
 379
 380 void zebra_redistribute_delete(ZAPI_HANDLER_ARGS)
 381 {
 382         afi_t afi = 0;
 383         int type = 0;
 384         unsigned short instance;
 385
 386         STREAM_GETC(msg, afi);
 387         STREAM_GETC(msg, type);
 388         STREAM_GETW(msg, instance);
 389
 390         if (afi == 0 || afi >= AFI_MAX) {
 391                 flog_warn(EC_ZEBRA_REDISTRIBUTE_UNKNOWN_AF,
 392                           "%s: Specified afi %d does not exist",
 393                           __PRETTY_FUNCTION__, afi);
 394                 return;
 395         }
 396
 397         if (type == 0 || type >= ZEBRA_ROUTE_MAX) {
 398                 zlog_debug("%s: Specified Route Type %d does not exist",
 399                            __PRETTY_FUNCTION__, type);
 400                 return;
 401         }
 402
 403         /*
 404          * NOTE: no need to withdraw the previously advertised routes. The
 405          * clients
 406          * themselves should keep track of the received routes from zebra and
 407          * withdraw them when necessary.
 408          */
 409         if (instance)
 410                 redist_del_instance(&client->mi_redist[afi][type], instance);
 411         else
 412                 vrf_bitmap_unset(client->redist[afi][type], zvrf_id(zvrf));
 413
 414 stream_failure:
 415         return;
 416 }
 417
 418 void zebra_redistribute_default_add(ZAPI_HANDLER_ARGS)
 419 {
 420         afi_t afi = 0;
 421
 422         STREAM_GETC(msg, afi);
 423
 424         if (afi == 0 || afi >= AFI_MAX) {
 425                 flog_warn(EC_ZEBRA_REDISTRIBUTE_UNKNOWN_AF,
 426                           "%s: Specified afi %u does not exist",
 427                           __PRETTY_FUNCTION__, afi);
 428                 return;
 429         }
 430
 431         vrf_bitmap_set(client->redist_default[afi], zvrf_id(zvrf));
 432         zebra_redistribute_default(client, zvrf_id(zvrf));
 433
 434 stream_failure:
 435         return;
 436 }
 437
 438 void zebra_redistribute_default_delete(ZAPI_HANDLER_ARGS)
 439 {
 440         afi_t afi = 0;
 441
 442         STREAM_GETC(msg, afi);
 443
 444         if (afi == 0 || afi >= AFI_MAX) {
 445                 flog_warn(EC_ZEBRA_REDISTRIBUTE_UNKNOWN_AF,
 446                           "%s: Specified afi %u does not exist",
 447                           __PRETTY_FUNCTION__, afi);
 448                 return;
 449         }
 450
 451         vrf_bitmap_unset(client->redist_default[afi], zvrf_id(zvrf));
 452
 453 stream_failure:
 454         return;
 455 }
 456
 457 /* Interface up information. */
 458 void zebra_interface_up_update(struct interface *ifp)
 459 {
 460         struct listnode *node, *nnode;
 461         struct zserv *client;
 462
 463         if (IS_ZEBRA_DEBUG_EVENT)
 464                 zlog_debug("MESSAGE: ZEBRA_INTERFACE_UP %s(%u)",
 465                            ifp->name, ifp->vrf_id);
 466
 467         if (ifp->ptm_status || !ifp->ptm_enable) {
 468                 for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode,
 469                                        client)) {
 470                         zsend_interface_update(ZEBRA_INTERFACE_UP,
 471                                                client, ifp);
 472                         zsend_interface_link_params(client, ifp);
 473                 }
 474         }
 475 }
 476
 477 /* Interface down information. */
 478 void zebra_interface_down_update(struct interface *ifp)
 479 {
 480         struct listnode *node, *nnode;
 481         struct zserv *client;
 482
 483         if (IS_ZEBRA_DEBUG_EVENT)
 484                 zlog_debug("MESSAGE: ZEBRA_INTERFACE_DOWN %s(%u)",
 485                            ifp->name, ifp->vrf_id);
 486
 487         for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
 488                 zsend_interface_update(ZEBRA_INTERFACE_DOWN, client, ifp);
 489         }
 490 }
 491
 492 /* Interface information update. */
 493 void zebra_interface_add_update(struct interface *ifp)
 494 {
 495         struct listnode *node, *nnode;
 496         struct zserv *client;
 497
 498         if (IS_ZEBRA_DEBUG_EVENT)
 499                 zlog_debug("MESSAGE: ZEBRA_INTERFACE_ADD %s(%u)", ifp->name,
 500                            ifp->vrf_id);
 501
 502         for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
 503                 client->ifadd_cnt++;
 504                 zsend_interface_add(client, ifp);
 505                 zsend_interface_link_params(client, ifp);
 506         }
 507 }
 508
 509 void zebra_interface_delete_update(struct interface *ifp)
 510 {
 511         struct listnode *node, *nnode;
 512         struct zserv *client;
 513
 514         if (IS_ZEBRA_DEBUG_EVENT)
 515                 zlog_debug("MESSAGE: ZEBRA_INTERFACE_DELETE %s(%u)",
 516                            ifp->name, ifp->vrf_id);
 517
 518         for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
 519                 client->ifdel_cnt++;
 520                 zsend_interface_delete(client, ifp);
 521         }
 522 }
 523
 524 /* Interface address addition. */
 525 void zebra_interface_address_add_update(struct interface *ifp,
 526                                         struct connected *ifc)
 527 {
 528         struct listnode *node, *nnode;
 529         struct zserv *client;
 530         struct prefix *p;
 531
 532         if (IS_ZEBRA_DEBUG_EVENT) {
 533                 char buf[PREFIX_STRLEN];
 534
 535                 p = ifc->address;
 536                 zlog_debug("MESSAGE: ZEBRA_INTERFACE_ADDRESS_ADD %s on %s(%u)",
 537                            prefix2str(p, buf, sizeof(buf)), ifp->name,
 538                            ifp->vrf_id);
 539         }
 540
 541         if (!CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL))
 542                 flog_warn(
 543                         EC_ZEBRA_ADVERTISING_UNUSABLE_ADDR,
 544                         "WARNING: advertising address to clients that is not yet usable.");
 545
 546         zebra_vxlan_add_del_gw_macip(ifp, ifc->address, 1);
 547
 548         router_id_add_address(ifc);
 549
 550         for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client))
 551                 if (CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL)) {
 552                         client->connected_rt_add_cnt++;
 553                         zsend_interface_address(ZEBRA_INTERFACE_ADDRESS_ADD,
 554                                                 client, ifp, ifc);
 555                 }
 556 }
 557
 558 /* Interface address deletion. */
 559 void zebra_interface_address_delete_update(struct interface *ifp,
 560                                            struct connected *ifc)
 561 {
 562         struct listnode *node, *nnode;
 563         struct zserv *client;
 564         struct prefix *p;
 565
 566         if (IS_ZEBRA_DEBUG_EVENT) {
 567                 char buf[PREFIX_STRLEN];
 568
 569                 p = ifc->address;
 570                 zlog_debug("MESSAGE: ZEBRA_INTERFACE_ADDRESS_DELETE %s on %s(%u)",
 571                            prefix2str(p, buf, sizeof(buf)),
 572                            ifp->name, ifp->vrf_id);
 573         }
 574
 575         zebra_vxlan_add_del_gw_macip(ifp, ifc->address, 0);
 576
 577         router_id_del_address(ifc);
 578
 579         for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client))
 580                 if (CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL)) {
 581                         client->connected_rt_del_cnt++;
 582                         zsend_interface_address(ZEBRA_INTERFACE_ADDRESS_DELETE,
 583                                                 client, ifp, ifc);
 584                 }
 585 }
 586
 587 /* Interface VRF change. May need to delete from clients not interested in
 588  * the new VRF. Note that this function is invoked *prior* to the VRF change.
 589  */
 590 void zebra_interface_vrf_update_del(struct interface *ifp, vrf_id_t new_vrf_id)
 591 {
 592         struct listnode *node, *nnode;
 593         struct zserv *client;
 594
 595         if (IS_ZEBRA_DEBUG_EVENT)
 596                 zlog_debug(
 597                         "MESSAGE: ZEBRA_INTERFACE_VRF_UPDATE/DEL %s VRF Id %u -> %u",
 598                         ifp->name, ifp->vrf_id, new_vrf_id);
 599
 600         for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
 601                 /* Need to delete if the client is not interested in the new
 602                  * VRF. */
 603                 zsend_interface_update(ZEBRA_INTERFACE_DOWN, client, ifp);
 604                 client->ifdel_cnt++;
 605                 zsend_interface_delete(client, ifp);
 606                 zsend_interface_vrf_update(client, ifp, new_vrf_id);
 607         }
 608 }
 609
 610 /* Interface VRF change. This function is invoked *post* VRF change and sends an
 611  * add to clients who are interested in the new VRF but not in the old VRF.
 612  */
 613 void zebra_interface_vrf_update_add(struct interface *ifp, vrf_id_t old_vrf_id)
 614 {
 615         struct listnode *node, *nnode;
 616         struct zserv *client;
 617
 618         if (IS_ZEBRA_DEBUG_EVENT)
 619                 zlog_debug(
 620                         "MESSAGE: ZEBRA_INTERFACE_VRF_UPDATE/ADD %s VRF Id %u -> %u",
 621                         ifp->name, old_vrf_id, ifp->vrf_id);
 622
 623         for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
 624                 /* Need to add if the client is interested in the new VRF. */
 625                 client->ifadd_cnt++;
 626                 zsend_interface_add(client, ifp);
 627                 zsend_interface_addresses(client, ifp);
 628         }
 629 }
 630
 631 int zebra_add_import_table_entry(struct zebra_vrf *zvrf, struct route_node *rn,
 632                                  struct route_entry *re, const char *rmap_name)
 633 {
 634         struct route_entry *newre;
 635         struct route_entry *same;
 636         struct prefix p;
 637         route_map_result_t ret = RMAP_PERMITMATCH;
 638         afi_t afi;
 639
 640         afi = family2afi(rn->p.family);
 641         if (rmap_name)
 642                 ret = zebra_import_table_route_map_check(
 643                         afi, re->type, re->instance, &rn->p, re->ng.nexthop,
 644                         zvrf->vrf->vrf_id, re->tag, rmap_name);
 645
 646         if (ret != RMAP_PERMITMATCH) {
 647                 UNSET_FLAG(re->flags, ZEBRA_FLAG_SELECTED);
 648                 zebra_del_import_table_entry(zvrf, rn, re);
 649                 return 0;
 650         }
 651
 652         prefix_copy(&p, &rn->p);
 653
 654         RNODE_FOREACH_RE (rn, same) {
 655                 if (CHECK_FLAG(same->status, ROUTE_ENTRY_REMOVED))
 656                         continue;
 657
 658                 if (same->type == re->type && same->instance == re->instance
 659                     && same->table == re->table
 660                     && same->type != ZEBRA_ROUTE_CONNECT)
 661                         break;
 662         }
 663
 664         if (same) {
 665                 UNSET_FLAG(same->flags, ZEBRA_FLAG_SELECTED);
 666                 zebra_del_import_table_entry(zvrf, rn, same);
 667         }
 668
 669         newre = XCALLOC(MTYPE_RE, sizeof(struct route_entry));
 670         newre->type = ZEBRA_ROUTE_TABLE;
 671         newre->distance = zebra_import_table_distance[afi][re->table];
 672         newre->flags = re->flags;
 673         newre->metric = re->metric;
 674         newre->mtu = re->mtu;
 675         newre->table = zvrf->table_id;
 676         newre->nexthop_num = 0;
 677         newre->uptime = monotime(NULL);
 678         newre->instance = re->table;
 679         route_entry_copy_nexthops(newre, re->ng.nexthop);
 680
 681         rib_add_multipath(afi, SAFI_UNICAST, &p, NULL, newre);
 682
 683         return 0;
 684 }
 685
 686 int zebra_del_import_table_entry(struct zebra_vrf *zvrf, struct route_node *rn,
 687                                  struct route_entry *re)
 688 {
 689         struct prefix p;
 690         afi_t afi;
 691
 692         afi = family2afi(rn->p.family);
 693         prefix_copy(&p, &rn->p);
 694
 695         rib_delete(afi, SAFI_UNICAST, zvrf->vrf->vrf_id, ZEBRA_ROUTE_TABLE,
 696                    re->table, re->flags, &p, NULL, re->ng.nexthop,
 697                    zvrf->table_id, re->metric, re->distance, false);
 698
 699         return 0;
 700 }
 701
 702 /* Assuming no one calls this with the main routing table */
 703 int zebra_import_table(afi_t afi, vrf_id_t vrf_id, uint32_t table_id,
 704                        uint32_t distance, const char *rmap_name, int add)
 705 {
 706         struct route_table *table;
 707         struct route_entry *re;
 708         struct route_node *rn;
 709         struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(vrf_id);
 710
 711         if (!is_zebra_valid_kernel_table(table_id)
 712             || (table_id == RT_TABLE_MAIN))
 713                 return (-1);
 714
 715         if (afi >= AFI_MAX)
 716                 return (-1);
 717
 718         table = zebra_vrf_table_with_table_id(afi, SAFI_UNICAST, vrf_id,
 719                                               table_id);
 720         if (table == NULL) {
 721                 return 0;
 722         } else if (IS_ZEBRA_DEBUG_RIB) {
 723                 zlog_debug("%s routes from table %d",
 724                            add ? "Importing" : "Unimporting", table_id);
 725         }
 726
 727         if (add) {
 728                 if (rmap_name)
 729                         zebra_add_import_table_route_map(afi, rmap_name,
 730                                                          table_id);
 731                 else {
 732                         rmap_name =
 733                                 zebra_get_import_table_route_map(afi, table_id);
 734                         if (rmap_name) {
 735                                 zebra_del_import_table_route_map(afi, table_id);
 736                                 rmap_name = NULL;
 737                         }
 738                 }
 739
 740                 zebra_import_table_used[afi][table_id] = 1;
 741                 zebra_import_table_distance[afi][table_id] = distance;
 742         } else {
 743                 zebra_import_table_used[afi][table_id] = 0;
 744                 zebra_import_table_distance[afi][table_id] =
 745                         ZEBRA_TABLE_DISTANCE_DEFAULT;
 746
 747                 rmap_name = zebra_get_import_table_route_map(afi, table_id);
 748                 if (rmap_name) {
 749                         zebra_del_import_table_route_map(afi, table_id);
 750                         rmap_name = NULL;
 751                 }
 752         }
 753
 754         for (rn = route_top(table); rn; rn = route_next(rn)) {
 755                 /* For each entry in the non-default routing table,
 756                  * add the entry in the main table
 757                  */
 758                 if (!rn->info)
 759                         continue;
 760
 761                 RNODE_FOREACH_RE (rn, re) {
 762                         if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED))
 763                                 continue;
 764                         break;
 765                 }
 766
 767                 if (!re)
 768                         continue;
 769
 770                 if (((afi == AFI_IP) && (rn->p.family == AF_INET))
 771                     || ((afi == AFI_IP6) && (rn->p.family == AF_INET6))) {
 772                         if (add)
 773                                 zebra_add_import_table_entry(zvrf, rn, re,
 774                                                              rmap_name);
 775                         else
 776                                 zebra_del_import_table_entry(zvrf, rn, re);
 777                 }
 778         }
 779         return 0;
 780 }
 781
 782 int zebra_import_table_config(struct vty *vty, vrf_id_t vrf_id)
 783 {
 784         int i;
 785         afi_t afi;
 786         int write = 0;
 787         char afi_str[AFI_MAX][10] = {"", "ip", "ipv6", "ethernet"};
 788         const char *rmap_name;
 789
 790         for (afi = AFI_IP; afi < AFI_MAX; afi++) {
 791                 for (i = 1; i < ZEBRA_KERNEL_TABLE_MAX; i++) {
 792                         if (!is_zebra_import_table_enabled(afi, vrf_id, i))
 793                                 continue;
 794
 795                         if (zebra_import_table_distance[afi][i]
 796                             != ZEBRA_TABLE_DISTANCE_DEFAULT) {
 797                                 vty_out(vty, "%s import-table %d distance %d",
 798                                         afi_str[afi], i,
 799                                         zebra_import_table_distance[afi][i]);
 800                         } else {
 801                                 vty_out(vty, "%s import-table %d", afi_str[afi],
 802                                         i);
 803                         }
 804
 805                         rmap_name = zebra_get_import_table_route_map(afi, i);
 806                         if (rmap_name)
 807                                 vty_out(vty, " route-map %s", rmap_name);
 808
 809                         vty_out(vty, "\n");
 810                         write = 1;
 811                 }
 812         }
 813
 814         return write;
 815 }
 816
 817 static void zebra_import_table_rm_update_vrf_afi(struct zebra_vrf *zvrf,
 818                                                  afi_t afi, int table_id,
 819                                                  const char *rmap)
 820 {
 821         struct route_table *table;
 822         struct route_entry *re;
 823         struct route_node *rn;
 824         const char *rmap_name;
 825
 826         rmap_name = zebra_get_import_table_route_map(afi, table_id);
 827         if ((!rmap_name) || (strcmp(rmap_name, rmap) != 0))
 828                 return;
 829
 830         table = zebra_vrf_table_with_table_id(afi, SAFI_UNICAST,
 831                                               zvrf->vrf->vrf_id, table_id);
 832         if (!table) {
 833                 if (IS_ZEBRA_DEBUG_RIB_DETAILED)
 834                         zlog_debug("%s: Table id=%d not found", __func__,
 835                                    table_id);
 836                 return;
 837         }
 838
 839         for (rn = route_top(table); rn; rn = route_next(rn)) {
 840                 /*
 841                  * For each entry in the non-default routing table,
 842                  * add the entry in the main table
 843                  */
 844                 if (!rn->info)
 845                         continue;
 846
 847                 RNODE_FOREACH_RE (rn, re) {
 848                         if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED))
 849                                 continue;
 850                         break;
 851                 }
 852
 853                 if (!re)
 854                         continue;
 855
 856                 if (((afi == AFI_IP) && (rn->p.family == AF_INET))
 857                     || ((afi == AFI_IP6) && (rn->p.family == AF_INET6)))
 858                         zebra_add_import_table_entry(zvrf, rn, re, rmap_name);
 859         }
 860
 861         return;
 862 }
 863
 864 static void zebra_import_table_rm_update_vrf(struct zebra_vrf *zvrf,
 865                                              const char *rmap)
 866 {
 867         afi_t afi;
 868         int i;
 869
 870         for (afi = AFI_IP; afi < AFI_MAX; afi++) {
 871                 for (i = 1; i < ZEBRA_KERNEL_TABLE_MAX; i++) {
 872                         if (!is_zebra_import_table_enabled(
 873                                     afi, zvrf->vrf->vrf_id, i))
 874                                 continue;
 875
 876                         zebra_import_table_rm_update_vrf_afi(zvrf, afi, i,
 877                                                              rmap);
 878                 }
 879         }
 880 }
 881
 882 void zebra_import_table_rm_update(const char *rmap)
 883 {
 884         struct vrf *vrf;
 885         struct zebra_vrf *zvrf;
 886
 887         RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) {
 888                 zvrf = vrf->info;
 889
 890                 if (!zvrf)
 891                         continue;
 892
 893                 zebra_import_table_rm_update_vrf(zvrf, rmap);
 894         }
 895 }
 896
 897 /* Interface parameters update */
 898 void zebra_interface_parameters_update(struct interface *ifp)
 899 {
 900         struct listnode *node, *nnode;
 901         struct zserv *client;
 902
 903         if (IS_ZEBRA_DEBUG_EVENT)
 904                 zlog_debug("MESSAGE: ZEBRA_INTERFACE_LINK_PARAMS %s(%u)",
 905                            ifp->name, ifp->vrf_id);
 906
 907         for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client))
 908                 zsend_interface_link_params(client, ifp);
 909 }