zebra/connected.c

   1 /*
   2  * Address linked list routine.
   3  * Copyright (C) 1997, 98 Kunihiro Ishiguro
   4  *
   5  * This file is part of GNU Zebra.
   6  *
   7  * GNU Zebra is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2, or (at your option) any
  10  * later version.
  11  *
  12  * GNU Zebra is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; see the file COPYING; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include <zebra.h>
  23
  24 #include "prefix.h"
  25 #include "linklist.h"
  26 #include "if.h"
  27 #include "table.h"
  28 #include "rib.h"
  29 #include "table.h"
  30 #include "log.h"
  31 #include "memory.h"
  32
  33 #include "vty.h"
  34 #include "zebra/debug.h"
  35 #include "zebra/zserv.h"
  36 #include "zebra/redistribute.h"
  37 #include "zebra/interface.h"
  38 #include "zebra/connected.h"
  39 #include "zebra/rtadv.h"
  40 #include "zebra/zebra_mpls.h"
  41 #include "zebra/zebra_errors.h"
  42 #include "zebra/zebra_router.h"
  43
  44 /* communicate the withdrawal of a connected address */
  45 static void connected_withdraw(struct connected *ifc)
  46 {
  47         if (!ifc)
  48                 return;
  49
  50         /* Update interface address information to protocol daemon. */
  51         if (CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL)) {
  52                 zebra_interface_address_delete_update(ifc->ifp, ifc);
  53
  54                 if (ifc->address->family == AF_INET)
  55                         if_subnet_delete(ifc->ifp, ifc);
  56
  57                 connected_down(ifc->ifp, ifc);
  58
  59                 UNSET_FLAG(ifc->conf, ZEBRA_IFC_REAL);
  60         }
  61
  62         /* The address is not in the kernel anymore, so clear the flag */
  63         UNSET_FLAG(ifc->conf, ZEBRA_IFC_QUEUED);
  64
  65         if (!CHECK_FLAG(ifc->conf, ZEBRA_IFC_CONFIGURED)) {
  66                 listnode_delete(ifc->ifp->connected, ifc);
  67                 connected_free(&ifc);
  68         }
  69 }
  70
  71 static void connected_announce(struct interface *ifp, struct connected *ifc)
  72 {
  73         if (!ifc)
  74                 return;
  75
  76         if (!if_is_loopback(ifp) && ifc->address->family == AF_INET) {
  77                 if (ifc->address->prefixlen == IPV4_MAX_BITLEN)
  78                         SET_FLAG(ifc->flags, ZEBRA_IFA_UNNUMBERED);
  79                 else
  80                         UNSET_FLAG(ifc->flags, ZEBRA_IFA_UNNUMBERED);
  81         }
  82
  83         listnode_add(ifp->connected, ifc);
  84
  85         /* Update interface address information to protocol daemon. */
  86         if (ifc->address->family == AF_INET)
  87                 if_subnet_add(ifp, ifc);
  88
  89         zebra_interface_address_add_update(ifp, ifc);
  90
  91         if (if_is_operative(ifp)) {
  92                 connected_up(ifp, ifc);
  93         }
  94 }
  95
  96 /* If same interface address is already exist... */
  97 struct connected *connected_check(struct interface *ifp,
  98                                   union prefixconstptr pu)
  99 {
 100         const struct prefix *p = pu.p;
 101         struct connected *ifc;
 102         struct listnode *node;
 103
 104         for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc))
 105                 if (prefix_same(ifc->address, p))
 106                         return ifc;
 107
 108         return NULL;
 109 }
 110
 111 /* same, but with peer address */
 112 struct connected *connected_check_ptp(struct interface *ifp,
 113                                       union prefixconstptr pu,
 114                                       union prefixconstptr du)
 115 {
 116         const struct prefix *p = pu.p;
 117         const struct prefix *d = du.p;
 118         struct connected *ifc;
 119         struct listnode *node;
 120
 121         for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) {
 122                 if (!prefix_same(ifc->address, p))
 123                         continue;
 124                 if (!CONNECTED_PEER(ifc) && !d)
 125                         return ifc;
 126                 if (CONNECTED_PEER(ifc) && d
 127                     && prefix_same(ifc->destination, d))
 128                         return ifc;
 129         }
 130
 131         return NULL;
 132 }
 133
 134 /* Check if two ifc's describe the same address in the same state */
 135 static int connected_same(struct connected *ifc1, struct connected *ifc2)
 136 {
 137         if (ifc1->ifp != ifc2->ifp)
 138                 return 0;
 139
 140         if (ifc1->flags != ifc2->flags)
 141                 return 0;
 142
 143         if (ifc1->conf != ifc2->conf)
 144                 return 0;
 145
 146         if (ifc1->destination)
 147                 if (!ifc2->destination)
 148                         return 0;
 149         if (ifc2->destination)
 150                 if (!ifc1->destination)
 151                         return 0;
 152
 153         if (ifc1->destination && ifc2->destination)
 154                 if (!prefix_same(ifc1->destination, ifc2->destination))
 155                         return 0;
 156
 157         return 1;
 158 }
 159
 160 /* Handle changes to addresses and send the neccesary announcements
 161  * to clients. */
 162 static void connected_update(struct interface *ifp, struct connected *ifc)
 163 {
 164         struct connected *current;
 165
 166         /* Check same connected route. */
 167         current = connected_check_ptp(ifp, ifc->address, ifc->destination);
 168         if (current) {
 169                 if (CHECK_FLAG(current->conf, ZEBRA_IFC_CONFIGURED))
 170                         SET_FLAG(ifc->conf, ZEBRA_IFC_CONFIGURED);
 171
 172                 /* Avoid spurious withdraws, this might be just the kernel
 173                  * 'reflecting'
 174                  * back an address we have already added.
 175                  */
 176                 if (connected_same(current, ifc)) {
 177                         /* nothing to do */
 178                         connected_free(&ifc);
 179                         return;
 180                 }
 181
 182                 /* Clear the configured flag on the old ifc, so it will be freed
 183                  * by
 184                  * connected withdraw. */
 185                 UNSET_FLAG(current->conf, ZEBRA_IFC_CONFIGURED);
 186                 connected_withdraw(
 187                         current); /* implicit withdraw - freebsd does this */
 188         }
 189
 190         /* If the connected is new or has changed, announce it, if it is usable
 191          */
 192         if (CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL))
 193                 connected_announce(ifp, ifc);
 194 }
 195
 196 /* Called from if_up(). */
 197 void connected_up(struct interface *ifp, struct connected *ifc)
 198 {
 199         afi_t afi;
 200         struct prefix p;
 201         struct nexthop nh = {
 202                 .type = NEXTHOP_TYPE_IFINDEX,
 203                 .ifindex = ifp->ifindex,
 204                 .vrf_id = ifp->vrf->vrf_id,
 205         };
 206         struct zebra_vrf *zvrf;
 207         uint32_t metric;
 208         uint32_t flags = 0;
 209         uint32_t count = 0;
 210         struct listnode *cnode;
 211         struct connected *c;
 212
 213         zvrf = ifp->vrf->info;
 214         if (!zvrf) {
 215                 flog_err(
 216                         EC_ZEBRA_VRF_NOT_FOUND,
 217                         "%s: Received Up for interface but no associated zvrf: %s(%d)",
 218                         __func__, ifp->vrf->name, ifp->vrf->vrf_id);
 219                 return;
 220         }
 221         if (!CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL))
 222                 return;
 223
 224         /* Ensure 'down' flag is cleared */
 225         UNSET_FLAG(ifc->conf, ZEBRA_IFC_DOWN);
 226
 227         prefix_copy(&p, CONNECTED_PREFIX(ifc));
 228
 229         /* Apply mask to the network. */
 230         apply_mask(&p);
 231
 232         afi = family2afi(p.family);
 233
 234         switch (afi) {
 235         case AFI_IP:
 236                 /*
 237                  * In case of connected address is 0.0.0.0/0 we treat it tunnel
 238                  * address.
 239                  */
 240                 if (prefix_ipv4_any((struct prefix_ipv4 *)&p))
 241                         return;
 242                 break;
 243         case AFI_IP6:
 244 #ifndef GNU_LINUX
 245                 /* XXX: It is already done by rib_bogus_ipv6 within rib_add */
 246                 if (IN6_IS_ADDR_UNSPECIFIED(&p.u.prefix6))
 247                         return;
 248 #endif
 249                 break;
 250         default:
 251                 flog_warn(EC_ZEBRA_CONNECTED_AFI_UNKNOWN,
 252                           "Received unknown AFI: %s", afi2str(afi));
 253                 return;
 254                 break;
 255         }
 256
 257         metric = (ifc->metric < (uint32_t)METRIC_MAX) ?
 258                                 ifc->metric : ifp->metric;
 259
 260         /*
 261          * Since we are hand creating the connected routes
 262          * in our main routing table, *if* we are working
 263          * in an offloaded environment then we need to
 264          * pretend like the route is offloaded so everything
 265          * else will work
 266          */
 267         if (zrouter.asic_offloaded)
 268                 flags |= ZEBRA_FLAG_OFFLOADED;
 269
 270         /*
 271          * It's possible to add the same network and mask
 272          * to an interface over and over.  This would
 273          * result in an equivalent number of connected
 274          * routes.  Just add one connected route in
 275          * for all the addresses on an interface that
 276          * resolve to the same network and mask
 277          */
 278         for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, c)) {
 279                 struct prefix cp;
 280
 281                 prefix_copy(&cp, CONNECTED_PREFIX(c));
 282                 apply_mask(&cp);
 283
 284                 if (prefix_same(&cp, &p) &&
 285                     !CHECK_FLAG(c->conf, ZEBRA_IFC_DOWN))
 286                         count++;
 287
 288                 if (count >= 2)
 289                         return;
 290         }
 291
 292         rib_add(afi, SAFI_UNICAST, zvrf->vrf->vrf_id, ZEBRA_ROUTE_CONNECT, 0,
 293                 flags, &p, NULL, &nh, 0, zvrf->table_id, metric, 0, 0, 0,
 294                 false);
 295
 296         rib_add(afi, SAFI_MULTICAST, zvrf->vrf->vrf_id, ZEBRA_ROUTE_CONNECT, 0,
 297                 flags, &p, NULL, &nh, 0, zvrf->table_id, metric, 0, 0, 0,
 298                 false);
 299
 300         /* Schedule LSP forwarding entries for processing, if appropriate. */
 301         if (zvrf->vrf->vrf_id == VRF_DEFAULT) {
 302                 if (IS_ZEBRA_DEBUG_MPLS)
 303                         zlog_debug(
 304                                 "%u: IF %s IP %pFX address add/up, scheduling MPLS processing",
 305                                 zvrf->vrf->vrf_id, ifp->name, &p);
 306                 mpls_mark_lsps_for_processing(zvrf, &p);
 307         }
 308 }
 309
 310 /* Add connected IPv4 route to the interface. */
 311 void connected_add_ipv4(struct interface *ifp, int flags,
 312                         const struct in_addr *addr, uint16_t prefixlen,
 313                         const struct in_addr *dest, const char *label,
 314                         uint32_t metric)
 315 {
 316         struct prefix_ipv4 *p;
 317         struct connected *ifc;
 318
 319         if (ipv4_martian(addr))
 320                 return;
 321
 322         /* Make connected structure. */
 323         ifc = connected_new();
 324         ifc->ifp = ifp;
 325         ifc->flags = flags;
 326         ifc->metric = metric;
 327         /* If we get a notification from the kernel,
 328          * we can safely assume the address is known to the kernel */
 329         SET_FLAG(ifc->conf, ZEBRA_IFC_QUEUED);
 330         if (!if_is_operative(ifp))
 331                 SET_FLAG(ifc->conf, ZEBRA_IFC_DOWN);
 332
 333         /* Allocate new connected address. */
 334         p = prefix_ipv4_new();
 335         p->family = AF_INET;
 336         p->prefix = *addr;
 337         p->prefixlen =
 338                 CHECK_FLAG(flags, ZEBRA_IFA_PEER) ? IPV4_MAX_BITLEN : prefixlen;
 339         ifc->address = (struct prefix *)p;
 340
 341         /* If there is a peer address. */
 342         if (CONNECTED_PEER(ifc)) {
 343                 /* validate the destination address */
 344                 if (dest) {
 345                         p = prefix_ipv4_new();
 346                         p->family = AF_INET;
 347                         p->prefix = *dest;
 348                         p->prefixlen = prefixlen;
 349                         ifc->destination = (struct prefix *)p;
 350
 351                         if (IPV4_ADDR_SAME(addr, dest))
 352                                 flog_warn(
 353                                         EC_ZEBRA_IFACE_SAME_LOCAL_AS_PEER,
 354                                         "interface %s has same local and peer address %pI4, routing protocols may malfunction",
 355                                         ifp->name, addr);
 356                 } else {
 357                         zlog_debug(
 358                                 "%s called for interface %s with peer flag set, but no peer address supplied",
 359                                 __func__, ifp->name);
 360                         UNSET_FLAG(ifc->flags, ZEBRA_IFA_PEER);
 361                 }
 362         }
 363
 364         /* no destination address was supplied */
 365         if (!dest && (prefixlen == IPV4_MAX_BITLEN) && if_is_pointopoint(ifp))
 366                 zlog_debug(
 367                         "PtP interface %s with addr %pI4/%d needs a peer address",
 368                         ifp->name, addr, prefixlen);
 369
 370         /* Label of this address. */
 371         if (label)
 372                 ifc->label = XSTRDUP(MTYPE_CONNECTED_LABEL, label);
 373
 374         /* For all that I know an IPv4 address is always ready when we receive
 375          * the notification. So it should be safe to set the REAL flag here. */
 376         SET_FLAG(ifc->conf, ZEBRA_IFC_REAL);
 377
 378         connected_update(ifp, ifc);
 379 }
 380
 381 void connected_down(struct interface *ifp, struct connected *ifc)
 382 {
 383         afi_t afi;
 384         struct prefix p;
 385         struct nexthop nh = {
 386                 .type = NEXTHOP_TYPE_IFINDEX,
 387                 .ifindex = ifp->ifindex,
 388                 .vrf_id = ifp->vrf->vrf_id,
 389         };
 390         struct zebra_vrf *zvrf, *zvrf_iter;
 391         uint32_t count_ipv4 = 0;
 392         struct listnode *cnode;
 393         struct connected *c;
 394         struct route_table *table;
 395         struct route_node *rn;
 396         struct route_entry *re, *next;
 397         struct vrf *vrf;
 398
 399         zvrf = ifp->vrf->info;
 400         if (!zvrf) {
 401                 flog_err(
 402                         EC_ZEBRA_VRF_NOT_FOUND,
 403                         "%s: Received Down for interface but no associated zvrf: %s(%d)",
 404                         __func__, ifp->vrf->name, ifp->vrf->vrf_id);
 405                 return;
 406         }
 407
 408         if (!CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL))
 409                 return;
 410
 411         /* Skip if we've already done this; this can happen if we have a
 412          * config change that takes an interface down, then we receive kernel
 413          * notifications about the downed interface and its addresses.
 414          */
 415         if (CHECK_FLAG(ifc->conf, ZEBRA_IFC_DOWN)) {
 416                 if (IS_ZEBRA_DEBUG_RIB)
 417                         zlog_debug("%s: ifc %p, %pFX already DOWN",
 418                                    __func__, ifc, ifc->address);
 419                 return;
 420         }
 421
 422         prefix_copy(&p, CONNECTED_PREFIX(ifc));
 423
 424         /* Apply mask to the network. */
 425         apply_mask(&p);
 426
 427         afi = family2afi(p.family);
 428
 429         switch (afi) {
 430         case AFI_IP:
 431                 /*
 432                  * In case of connected address is 0.0.0.0/0 we treat it tunnel
 433                  *  address.
 434                  */
 435                 if (prefix_ipv4_any((struct prefix_ipv4 *)&p))
 436                         return;
 437                 break;
 438         case AFI_IP6:
 439                 if (IN6_IS_ADDR_UNSPECIFIED(&p.u.prefix6))
 440                         return;
 441                 break;
 442         default:
 443                 zlog_warn("Unknown AFI: %s", afi2str(afi));
 444                 break;
 445         }
 446
 447         /* Mark the address as 'down' */
 448         SET_FLAG(ifc->conf, ZEBRA_IFC_DOWN);
 449
 450         /*
 451          * It's possible to have X number of addresses
 452          * on a interface that all resolve to the same
 453          * network and mask.  Find them and just
 454          * allow the deletion when are removing the last
 455          * one.
 456          */
 457         for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, c)) {
 458                 struct prefix cp;
 459
 460                 prefix_copy(&cp, CONNECTED_PREFIX(c));
 461                 apply_mask(&cp);
 462
 463                 if (CHECK_FLAG(c->conf, ZEBRA_IFC_DOWN))
 464                         continue;
 465
 466                 if (prefix_same(&p, &cp))
 467                         return;
 468
 469                 if (cp.family == AF_INET)
 470                         count_ipv4++;
 471         }
 472
 473         /*
 474          * Same logic as for connected_up(): push the changes into the
 475          * head.
 476          */
 477         rib_delete(afi, SAFI_UNICAST, zvrf->vrf->vrf_id, ZEBRA_ROUTE_CONNECT, 0,
 478                    0, &p, NULL, &nh, 0, zvrf->table_id, 0, 0, false);
 479
 480         rib_delete(afi, SAFI_MULTICAST, zvrf->vrf->vrf_id, ZEBRA_ROUTE_CONNECT,
 481                    0, 0, &p, NULL, &nh, 0, zvrf->table_id, 0, 0, false);
 482
 483         /* When the last IPv4 address of an interface is deleted, Linux removes
 484          * all routes using this interface without any Netlink advertisement.
 485          * The removed routes include those that only have this particular
 486          * interface as a nexthop. Among those, remove the kernel one from the
 487          * FRR RIB and reinstall the other that have been added from FRR.
 488          */
 489         if (afi == AFI_IP && count_ipv4 == 0 && if_is_operative(ifp)) {
 490                 RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) {
 491                         zvrf_iter = vrf->info;
 492
 493                         if (!zvrf_iter)
 494                                 continue;
 495
 496                         table = zvrf_iter->table[AFI_IP][SAFI_UNICAST];
 497                         if (!table)
 498                                 continue;
 499
 500                         for (rn = route_top(table); rn;
 501                              rn = srcdest_route_next(rn)) {
 502                                 RNODE_FOREACH_RE_SAFE (rn, re, next) {
 503                                         if (CHECK_FLAG(re->status,
 504                                                        ROUTE_ENTRY_REMOVED))
 505                                                 continue;
 506                                         if (re->nhe->ifp != ifp)
 507                                                 continue;
 508                                         if (re->type == ZEBRA_ROUTE_KERNEL)
 509                                                 rib_delete(
 510                                                         afi, SAFI_UNICAST,
 511                                                         zvrf_iter->vrf->vrf_id,
 512                                                         re->type, 0, re->flags,
 513                                                         &rn->p, NULL, &nh, 0,
 514                                                         zvrf_iter->table_id,
 515                                                         re->metric,
 516                                                         re->distance, false);
 517                                         else if (re->type !=
 518                                                  ZEBRA_ROUTE_CONNECT) {
 519                                                 SET_FLAG(re->status,
 520                                                          ROUTE_ENTRY_CHANGED);
 521                                                 UNSET_FLAG(
 522                                                         re->status,
 523                                                         ROUTE_ENTRY_INSTALLED);
 524                                                 rib_add(afi, SAFI_UNICAST,
 525                                                         zvrf_iter->vrf->vrf_id,
 526                                                         re->type, 0, 0, &rn->p,
 527                                                         NULL, &nh, re->nhe_id,
 528                                                         zvrf_iter->table_id,
 529                                                         re->metric, 0,
 530                                                         re->distance, 0, false);
 531                                         }
 532                                 }
 533                         }
 534                 }
 535         }
 536
 537         /* Schedule LSP forwarding entries for processing, if appropriate. */
 538         if (zvrf->vrf->vrf_id == VRF_DEFAULT) {
 539                 if (IS_ZEBRA_DEBUG_MPLS)
 540                         zlog_debug(
 541                                 "%u: IF %s IP %pFX address down, scheduling MPLS processing",
 542                                 zvrf->vrf->vrf_id, ifp->name, &p);
 543                 mpls_mark_lsps_for_processing(zvrf, &p);
 544         }
 545 }
 546
 547 static void connected_delete_helper(struct connected *ifc, struct prefix *p)
 548 {
 549         struct interface *ifp;
 550
 551         if (!ifc)
 552                 return;
 553         ifp = ifc->ifp;
 554
 555         connected_withdraw(ifc);
 556
 557         /* Schedule LSP forwarding entries for processing, if appropriate. */
 558         if (ifp->vrf->vrf_id == VRF_DEFAULT) {
 559                 if (IS_ZEBRA_DEBUG_MPLS)
 560                         zlog_debug(
 561                                 "%u: IF %s IP %pFX address delete, scheduling MPLS processing",
 562                                 ifp->vrf->vrf_id, ifp->name, p);
 563                 mpls_mark_lsps_for_processing(ifp->vrf->info, p);
 564         }
 565 }
 566
 567 /* Delete connected IPv4 route to the interface. */
 568 void connected_delete_ipv4(struct interface *ifp, int flags,
 569                            const struct in_addr *addr, uint16_t prefixlen,
 570                            const struct in_addr *dest)
 571 {
 572         struct prefix p, d;
 573         struct connected *ifc;
 574
 575         memset(&p, 0, sizeof(p));
 576         p.family = AF_INET;
 577         p.u.prefix4 = *addr;
 578         p.prefixlen =
 579                 CHECK_FLAG(flags, ZEBRA_IFA_PEER) ? IPV4_MAX_BITLEN : prefixlen;
 580
 581         if (dest) {
 582                 memset(&d, 0, sizeof(d));
 583                 d.family = AF_INET;
 584                 d.u.prefix4 = *dest;
 585                 d.prefixlen = prefixlen;
 586                 ifc = connected_check_ptp(ifp, &p, &d);
 587         } else
 588                 ifc = connected_check_ptp(ifp, &p, NULL);
 589
 590         connected_delete_helper(ifc, &p);
 591 }
 592
 593 /* Add connected IPv6 route to the interface. */
 594 void connected_add_ipv6(struct interface *ifp, int flags,
 595                         const struct in6_addr *addr,
 596                         const struct in6_addr *dest, uint16_t prefixlen,
 597                         const char *label, uint32_t metric)
 598 {
 599         struct prefix_ipv6 *p;
 600         struct connected *ifc;
 601
 602         if (ipv6_martian(addr))
 603                 return;
 604
 605         /* Make connected structure. */
 606         ifc = connected_new();
 607         ifc->ifp = ifp;
 608         ifc->flags = flags;
 609         ifc->metric = metric;
 610         /* If we get a notification from the kernel,
 611          * we can safely assume the address is known to the kernel */
 612         SET_FLAG(ifc->conf, ZEBRA_IFC_QUEUED);
 613         if (!if_is_operative(ifp))
 614                 SET_FLAG(ifc->conf, ZEBRA_IFC_DOWN);
 615
 616         /* Allocate new connected address. */
 617         p = prefix_ipv6_new();
 618         p->family = AF_INET6;
 619         IPV6_ADDR_COPY(&p->prefix, addr);
 620         p->prefixlen = prefixlen;
 621         ifc->address = (struct prefix *)p;
 622
 623         /* Add global ipv6 address to the RA prefix list */
 624         if (!IN6_IS_ADDR_LINKLOCAL(&p->prefix))
 625                 rtadv_add_prefix(ifp->info, p);
 626
 627         if (dest) {
 628                 p = prefix_ipv6_new();
 629                 p->family = AF_INET6;
 630                 IPV6_ADDR_COPY(&p->prefix, dest);
 631                 p->prefixlen = prefixlen;
 632                 ifc->destination = (struct prefix *)p;
 633         } else {
 634                 if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_PEER)) {
 635                         zlog_debug(
 636                                 "%s called for interface %s with peer flag set, but no peer address supplied",
 637                                 __func__, ifp->name);
 638                         UNSET_FLAG(ifc->flags, ZEBRA_IFA_PEER);
 639                 }
 640         }
 641
 642         /* Label of this address. */
 643         if (label)
 644                 ifc->label = XSTRDUP(MTYPE_CONNECTED_LABEL, label);
 645
 646         /* On Linux, we only get here when DAD is complete, therefore we can set
 647          * ZEBRA_IFC_REAL.
 648          *
 649          * On BSD, there currently doesn't seem to be a way to check for
 650          * completion of
 651          * DAD, so we replicate the old behaviour and set ZEBRA_IFC_REAL,
 652          * although DAD
 653          * might still be running.
 654          */
 655         SET_FLAG(ifc->conf, ZEBRA_IFC_REAL);
 656         connected_update(ifp, ifc);
 657 }
 658
 659 void connected_delete_ipv6(struct interface *ifp,
 660                            const struct in6_addr *address,
 661                            const struct in6_addr *dest, uint16_t prefixlen)
 662 {
 663         struct prefix p, d;
 664         struct connected *ifc;
 665
 666         memset(&p, 0, sizeof(p));
 667         p.family = AF_INET6;
 668         memcpy(&p.u.prefix6, address, sizeof(struct in6_addr));
 669         p.prefixlen = prefixlen;
 670
 671         /* Delete global ipv6 address from RA prefix list */
 672         if (!IN6_IS_ADDR_LINKLOCAL(&p.u.prefix6))
 673                 rtadv_delete_prefix(ifp->info, &p);
 674
 675         if (dest) {
 676                 memset(&d, 0, sizeof(d));
 677                 d.family = AF_INET6;
 678                 IPV6_ADDR_COPY(&d.u.prefix6, dest);
 679                 d.prefixlen = prefixlen;
 680                 ifc = connected_check_ptp(ifp, &p, &d);
 681         } else
 682                 ifc = connected_check_ptp(ifp, &p, NULL);
 683
 684         connected_delete_helper(ifc, &p);
 685 }
 686
 687 int connected_is_unnumbered(struct interface *ifp)
 688 {
 689         struct connected *connected;
 690         struct listnode *node;
 691
 692         for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, connected)) {
 693                 if (CHECK_FLAG(connected->conf, ZEBRA_IFC_REAL)
 694                     && connected->address->family == AF_INET)
 695                         return CHECK_FLAG(connected->flags,
 696                                           ZEBRA_IFA_UNNUMBERED);
 697         }
 698         return 0;
 699 }