ldpd/ldp_zebra.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2016 by Open Source Routing.
   4  */
   5
   6 #include <zebra.h>
   7
   8 #include "prefix.h"
   9 #include "stream.h"
  10 #include "memory.h"
  11 #include "zclient.h"
  12 #include "command.h"
  13 #include "network.h"
  14 #include "linklist.h"
  15 #include "mpls.h"
  16
  17 #include "ldpd.h"
  18 #include "ldpe.h"
  19 #include "lde.h"
  20 #include "ldp_sync.h"
  21 #include "log.h"
  22 #include "ldp_debug.h"
  23
  24 static void      ifp2kif(struct interface *, struct kif *);
  25 static void      ifc2kaddr(struct interface *, struct connected *,
  26                     struct kaddr *);
  27 static int       ldp_zebra_send_mpls_labels(int, struct kroute *);
  28 static int       ldp_router_id_update(ZAPI_CALLBACK_ARGS);
  29 static int       ldp_interface_address_add(ZAPI_CALLBACK_ARGS);
  30 static int       ldp_interface_address_delete(ZAPI_CALLBACK_ARGS);
  31 static int       ldp_zebra_read_route(ZAPI_CALLBACK_ARGS);
  32 static int       ldp_zebra_read_pw_status_update(ZAPI_CALLBACK_ARGS);
  33 static void      ldp_zebra_connected(struct zclient *);
  34 static void      ldp_zebra_filter_update(struct access_list *access);
  35
  36 static void     ldp_zebra_opaque_register(void);
  37 static void     ldp_zebra_opaque_unregister(void);
  38 static int      ldp_sync_zebra_send_announce(void);
  39 static int      ldp_zebra_opaque_msg_handler(ZAPI_CALLBACK_ARGS);
  40 static void     ldp_sync_zebra_init(void);
  41
  42 static struct zclient   *zclient;
  43 static bool zebra_registered = false;
  44
  45 static void
  46 ifp2kif(struct interface *ifp, struct kif *kif)
  47 {
  48         memset(kif, 0, sizeof(*kif));
  49         strlcpy(kif->ifname, ifp->name, sizeof(kif->ifname));
  50         kif->ifindex = ifp->ifindex;
  51         kif->operative = if_is_operative(ifp);
  52         if (ifp->ll_type == ZEBRA_LLT_ETHER)
  53                 memcpy(kif->mac, ifp->hw_addr, ETH_ALEN);
  54 }
  55
  56 static void
  57 ifc2kaddr(struct interface *ifp, struct connected *ifc, struct kaddr *ka)
  58 {
  59         memset(ka, 0, sizeof(*ka));
  60         strlcpy(ka->ifname, ifp->name, sizeof(ka->ifname));
  61         ka->ifindex = ifp->ifindex;
  62         ka->af = ifc->address->family;
  63         ka->prefixlen = ifc->address->prefixlen;
  64
  65         switch (ka->af) {
  66         case AF_INET:
  67                 ka->addr.v4 = ifc->address->u.prefix4;
  68                 if (ifc->destination)
  69                         ka->dstbrd.v4 = ifc->destination->u.prefix4;
  70                 break;
  71         case AF_INET6:
  72                 ka->addr.v6 = ifc->address->u.prefix6;
  73                 if (ifc->destination)
  74                         ka->dstbrd.v6 = ifc->destination->u.prefix6;
  75                 break;
  76         default:
  77                 break;
  78         }
  79 }
  80
  81 void
  82 pw2zpw(struct l2vpn_pw *pw, struct zapi_pw *zpw)
  83 {
  84         memset(zpw, 0, sizeof(*zpw));
  85         strlcpy(zpw->ifname, pw->ifname, sizeof(zpw->ifname));
  86         zpw->ifindex = pw->ifindex;
  87         zpw->type = pw->l2vpn->pw_type;
  88         zpw->af = pw->af;
  89         zpw->nexthop.ipv6 = pw->addr.v6;
  90         zpw->local_label = NO_LABEL;
  91         zpw->remote_label = NO_LABEL;
  92         if (CHECK_FLAG(pw->flags, F_PW_CWORD))
  93                 zpw->flags = F_PSEUDOWIRE_CWORD;
  94         zpw->data.ldp.lsr_id = pw->lsr_id;
  95         zpw->data.ldp.pwid = pw->pwid;
  96         strlcpy(zpw->data.ldp.vpn_name, pw->l2vpn->name,
  97             sizeof(zpw->data.ldp.vpn_name));
  98 }
  99
 100 static void
 101 ldp_zebra_opaque_register(void)
 102 {
 103         zclient_register_opaque(zclient, LDP_IGP_SYNC_IF_STATE_REQUEST);
 104         zclient_register_opaque(zclient, LDP_RLFA_REGISTER);
 105         zclient_register_opaque(zclient, LDP_RLFA_UNREGISTER_ALL);
 106 }
 107
 108 static void
 109 ldp_zebra_opaque_unregister(void)
 110 {
 111         zclient_unregister_opaque(zclient, LDP_IGP_SYNC_IF_STATE_REQUEST);
 112         zclient_unregister_opaque(zclient, LDP_RLFA_REGISTER);
 113         zclient_unregister_opaque(zclient, LDP_RLFA_UNREGISTER_ALL);
 114 }
 115
 116 int
 117 ldp_sync_zebra_send_state_update(struct ldp_igp_sync_if_state *state)
 118 {
 119         if (zclient_send_opaque(zclient, LDP_IGP_SYNC_IF_STATE_UPDATE,
 120                                 (const uint8_t *)state, sizeof(*state))
 121             == ZCLIENT_SEND_FAILURE)
 122                 return -1;
 123         else
 124                 return 0;
 125 }
 126
 127 static int
 128 ldp_sync_zebra_send_announce(void)
 129 {
 130         struct ldp_igp_sync_announce announce;
 131         announce.proto = ZEBRA_ROUTE_LDP;
 132
 133         if (zclient_send_opaque(zclient, LDP_IGP_SYNC_ANNOUNCE_UPDATE,
 134                                 (const uint8_t *)&announce, sizeof(announce))
 135             == ZCLIENT_SEND_FAILURE)
 136                 return -1;
 137         else
 138                 return 0;
 139 }
 140
 141 int ldp_zebra_send_rlfa_labels(struct zapi_rlfa_response *rlfa_labels)
 142 {
 143         int ret;
 144
 145         ret = zclient_send_opaque(zclient, LDP_RLFA_LABELS,
 146                                   (const uint8_t *)rlfa_labels,
 147                                   sizeof(*rlfa_labels));
 148         if (ret == ZCLIENT_SEND_FAILURE) {
 149                 log_warn("failed to send RLFA labels to IGP");
 150                 return -1;
 151         }
 152
 153         return 0;
 154 }
 155
 156 static int
 157 ldp_zebra_opaque_msg_handler(ZAPI_CALLBACK_ARGS)
 158 {
 159         struct stream *s;
 160         struct zapi_opaque_msg info;
 161         struct ldp_igp_sync_if_state_req state_req;
 162         struct zapi_rlfa_igp igp;
 163         struct zapi_rlfa_request rlfa;
 164
 165         s = zclient->ibuf;
 166
 167         if(zclient_opaque_decode(s, &info) != 0)
 168                 return -1;
 169
 170         switch (info.type) {
 171         case LDP_IGP_SYNC_IF_STATE_REQUEST:
 172                 STREAM_GET(&state_req, s, sizeof(state_req));
 173                 main_imsg_compose_ldpe(IMSG_LDP_SYNC_IF_STATE_REQUEST, 0, &state_req,
 174                             sizeof(state_req));
 175                 break;
 176         case LDP_RLFA_REGISTER:
 177                 STREAM_GET(&rlfa, s, sizeof(rlfa));
 178                 main_imsg_compose_both(IMSG_RLFA_REG, &rlfa, sizeof(rlfa));
 179                 break;
 180         case LDP_RLFA_UNREGISTER_ALL:
 181                 STREAM_GET(&igp, s, sizeof(igp));
 182                 main_imsg_compose_both(IMSG_RLFA_UNREG_ALL, &igp, sizeof(igp));
 183                 break;
 184         default:
 185                 break;
 186         }
 187
 188 stream_failure:
 189         return 0;
 190 }
 191
 192 static void
 193 ldp_sync_zebra_init(void)
 194 {
 195         ldp_sync_zebra_send_announce();
 196 }
 197
 198 static int
 199 ldp_zebra_send_mpls_labels(int cmd, struct kroute *kr)
 200 {
 201         struct zapi_labels zl = {};
 202         struct zapi_nexthop *znh;
 203
 204         if (kr->local_label < MPLS_LABEL_RESERVED_MAX)
 205                 return (0);
 206
 207         debug_zebra_out("prefix %s/%u nexthop %s ifindex %u labels %s/%s (%s)",
 208             log_addr(kr->af, &kr->prefix), kr->prefixlen,
 209             log_addr(kr->af, &kr->nexthop), kr->ifindex,
 210             log_label(kr->local_label), log_label(kr->remote_label),
 211             (cmd == ZEBRA_MPLS_LABELS_ADD) ? "add" : "delete");
 212
 213         zl.type = ZEBRA_LSP_LDP;
 214         zl.local_label = kr->local_label;
 215
 216         /* Set prefix. */
 217         if (kr->remote_label != NO_LABEL) {
 218                 SET_FLAG(zl.message, ZAPI_LABELS_FTN);
 219                 zl.route.prefix.family = kr->af;
 220                 switch (kr->af) {
 221                 case AF_INET:
 222                         zl.route.prefix.u.prefix4 = kr->prefix.v4;
 223                         break;
 224                 case AF_INET6:
 225                         zl.route.prefix.u.prefix6 = kr->prefix.v6;
 226                         break;
 227                 default:
 228                         fatalx("ldp_zebra_send_mpls_labels: unknown af");
 229                 }
 230                 zl.route.prefix.prefixlen = kr->prefixlen;
 231                 zl.route.type = kr->route_type;
 232                 zl.route.instance = kr->route_instance;
 233         }
 234
 235         /* If allow-broken-lsps is enabled then if an lsp is received with
 236          * no remote label, instruct the forwarding plane to pop the top-level
 237          * label and forward packets normally. This is a best-effort attempt
 238          * to deliver labeled IP packets to their final destination (instead of
 239          * dropping them).
 240          */
 241         if (kr->remote_label == NO_LABEL
 242             && !CHECK_FLAG(ldpd_conf->flags, F_LDPD_ALLOW_BROKEN_LSP)
 243             && cmd == ZEBRA_MPLS_LABELS_ADD)
 244                 return 0;
 245
 246         if (kr->remote_label == NO_LABEL)
 247                 kr->remote_label = MPLS_LABEL_IMPLICIT_NULL;
 248
 249         /* Set nexthop. */
 250         zl.nexthop_num = 1;
 251         znh = &zl.nexthops[0];
 252         switch (kr->af) {
 253         case AF_INET:
 254                 znh->gate.ipv4 = kr->nexthop.v4;
 255                 if (kr->ifindex)
 256                         znh->type = NEXTHOP_TYPE_IPV4_IFINDEX;
 257                 else
 258                         znh->type = NEXTHOP_TYPE_IPV4;
 259                 break;
 260         case AF_INET6:
 261                 znh->gate.ipv6 = kr->nexthop.v6;
 262                 if (kr->ifindex)
 263                         znh->type = NEXTHOP_TYPE_IPV6_IFINDEX;
 264                 else
 265                         znh->type = NEXTHOP_TYPE_IPV6;
 266                 break;
 267         default:
 268                 break;
 269         }
 270         znh->ifindex = kr->ifindex;
 271         znh->label_num = 1;
 272         znh->labels[0] = kr->remote_label;
 273
 274         if (zebra_send_mpls_labels(zclient, cmd, &zl) == ZCLIENT_SEND_FAILURE)
 275                 return -1;
 276
 277         return 0;
 278 }
 279
 280 int
 281 kr_change(struct kroute *kr)
 282 {
 283         return (ldp_zebra_send_mpls_labels(ZEBRA_MPLS_LABELS_ADD, kr));
 284 }
 285
 286 int
 287 kr_delete(struct kroute *kr)
 288 {
 289         return (ldp_zebra_send_mpls_labels(ZEBRA_MPLS_LABELS_DELETE, kr));
 290 }
 291
 292 int
 293 kmpw_add(struct zapi_pw *zpw)
 294 {
 295         debug_zebra_out("pseudowire %s nexthop %s (add)",
 296             zpw->ifname, log_addr(zpw->af, (union ldpd_addr *)&zpw->nexthop));
 297
 298         return zebra_send_pw(zclient, ZEBRA_PW_ADD, zpw)
 299                == ZCLIENT_SEND_FAILURE;
 300 }
 301
 302 int
 303 kmpw_del(struct zapi_pw *zpw)
 304 {
 305         debug_zebra_out("pseudowire %s nexthop %s (del)",
 306             zpw->ifname, log_addr(zpw->af, (union ldpd_addr *)&zpw->nexthop));
 307
 308         return zebra_send_pw(zclient, ZEBRA_PW_DELETE, zpw)
 309                == ZCLIENT_SEND_FAILURE;
 310 }
 311
 312 int
 313 kmpw_set(struct zapi_pw *zpw)
 314 {
 315         debug_zebra_out("pseudowire %s nexthop %s labels %u/%u (set)",
 316             zpw->ifname, log_addr(zpw->af, (union ldpd_addr *)&zpw->nexthop),
 317             zpw->local_label, zpw->remote_label);
 318
 319         return zebra_send_pw(zclient, ZEBRA_PW_SET, zpw)
 320                == ZCLIENT_SEND_FAILURE;
 321 }
 322
 323 int
 324 kmpw_unset(struct zapi_pw *zpw)
 325 {
 326         debug_zebra_out("pseudowire %s nexthop %s (unset)",
 327             zpw->ifname, log_addr(zpw->af, (union ldpd_addr *)&zpw->nexthop));
 328
 329         return zebra_send_pw(zclient, ZEBRA_PW_UNSET, zpw)
 330                == ZCLIENT_SEND_FAILURE;
 331 }
 332
 333 void
 334 kif_redistribute(const char *ifname)
 335 {
 336         struct vrf              *vrf = vrf_lookup_by_id(VRF_DEFAULT);
 337         struct listnode         *cnode;
 338         struct interface        *ifp;
 339         struct connected        *ifc;
 340         struct kif               kif;
 341         struct kaddr             ka;
 342
 343         FOR_ALL_INTERFACES (vrf, ifp) {
 344                 if (ifname && strcmp(ifname, ifp->name) != 0)
 345                         continue;
 346
 347                 ifp2kif(ifp, &kif);
 348                 main_imsg_compose_both(IMSG_IFSTATUS, &kif, sizeof(kif));
 349
 350                 for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, ifc)) {
 351                         ifc2kaddr(ifp, ifc, &ka);
 352                         main_imsg_compose_ldpe(IMSG_NEWADDR, 0, &ka, sizeof(ka));
 353                 }
 354         }
 355 }
 356
 357 static int
 358 ldp_router_id_update(ZAPI_CALLBACK_ARGS)
 359 {
 360         struct prefix    router_id;
 361
 362         zebra_router_id_update_read(zclient->ibuf, &router_id);
 363
 364         if (bad_addr_v4(router_id.u.prefix4))
 365                 return (0);
 366
 367         debug_zebra_in("router-id update %pI4", &router_id.u.prefix4);
 368
 369         global.rtr_id.s_addr = router_id.u.prefix4.s_addr;
 370         main_imsg_compose_ldpe(IMSG_RTRID_UPDATE, 0, &global.rtr_id,
 371             sizeof(global.rtr_id));
 372
 373         return (0);
 374 }
 375
 376 static int
 377 ldp_ifp_create(struct interface *ifp)
 378 {
 379         struct kif               kif;
 380
 381         debug_zebra_in("interface add %s index %d mtu %d", ifp->name,
 382             ifp->ifindex, ifp->mtu);
 383
 384         ifp2kif(ifp, &kif);
 385         main_imsg_compose_both(IMSG_IFSTATUS, &kif, sizeof(kif));
 386
 387         return 0;
 388 }
 389
 390 static int
 391 ldp_ifp_destroy(struct interface *ifp)
 392 {
 393         struct kif               kif;
 394
 395         debug_zebra_in("interface delete %s index %d mtu %d", ifp->name,
 396             ifp->ifindex, ifp->mtu);
 397
 398         ifp2kif(ifp, &kif);
 399         main_imsg_compose_both(IMSG_IFSTATUS, &kif, sizeof(kif));
 400
 401         return (0);
 402 }
 403
 404 static int
 405 ldp_interface_status_change(struct interface *ifp)
 406 {
 407         struct listnode         *node;
 408         struct connected        *ifc;
 409         struct kif               kif;
 410         struct kaddr             ka;
 411
 412         debug_zebra_in("interface %s state update", ifp->name);
 413
 414         ifp2kif(ifp, &kif);
 415         main_imsg_compose_both(IMSG_IFSTATUS, &kif, sizeof(kif));
 416
 417         if (if_is_operative(ifp)) {
 418                 for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) {
 419                         ifc2kaddr(ifp, ifc, &ka);
 420                         main_imsg_compose_ldpe(IMSG_NEWADDR, 0, &ka, sizeof(ka));
 421                 }
 422         } else {
 423                 for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) {
 424                         ifc2kaddr(ifp, ifc, &ka);
 425                         main_imsg_compose_ldpe(IMSG_DELADDR, 0, &ka, sizeof(ka));
 426                 }
 427         }
 428
 429         return (0);
 430 }
 431
 432 static int ldp_ifp_up(struct interface *ifp)
 433 {
 434         return ldp_interface_status_change(ifp);
 435 }
 436
 437 static int ldp_ifp_down(struct interface *ifp)
 438 {
 439         return ldp_interface_status_change(ifp);
 440 }
 441
 442 static int
 443 ldp_interface_address_add(ZAPI_CALLBACK_ARGS)
 444 {
 445         struct connected        *ifc;
 446         struct interface        *ifp;
 447         struct kaddr             ka;
 448
 449         ifc = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
 450         if (ifc == NULL)
 451                 return (0);
 452
 453         ifp = ifc->ifp;
 454         ifc2kaddr(ifp, ifc, &ka);
 455
 456         /* Filter invalid addresses.  */
 457         if (bad_addr(ka.af, &ka.addr))
 458                 return (0);
 459
 460         debug_zebra_in("address add %s/%u interface %s",
 461             log_addr(ka.af, &ka.addr), ka.prefixlen, ifp->name);
 462
 463         /* notify ldpe about new address */
 464         main_imsg_compose_ldpe(IMSG_NEWADDR, 0, &ka, sizeof(ka));
 465
 466         return (0);
 467 }
 468
 469 static int
 470 ldp_interface_address_delete(ZAPI_CALLBACK_ARGS)
 471 {
 472         struct connected        *ifc;
 473         struct interface        *ifp;
 474         struct kaddr             ka;
 475
 476         ifc = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
 477         if (ifc == NULL)
 478                 return (0);
 479
 480         ifp = ifc->ifp;
 481         ifc2kaddr(ifp, ifc, &ka);
 482         connected_free(&ifc);
 483
 484         /* Filter invalid addresses.  */
 485         if (bad_addr(ka.af, &ka.addr))
 486                 return (0);
 487
 488         debug_zebra_in("address delete %s/%u interface %s",
 489             log_addr(ka.af, &ka.addr), ka.prefixlen, ifp->name);
 490
 491         /* notify ldpe about removed address */
 492         main_imsg_compose_ldpe(IMSG_DELADDR, 0, &ka, sizeof(ka));
 493
 494         return (0);
 495 }
 496
 497 static int
 498 ldp_zebra_read_route(ZAPI_CALLBACK_ARGS)
 499 {
 500         struct zapi_route        api;
 501         struct zapi_nexthop     *api_nh;
 502         struct kroute            kr;
 503         int                      i, add = 0;
 504
 505         if (zapi_route_decode(zclient->ibuf, &api) < 0)
 506                 return -1;
 507
 508         /* we completely ignore srcdest routes for now. */
 509         if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
 510                 return (0);
 511
 512         memset(&kr, 0, sizeof(kr));
 513         kr.af = api.prefix.family;
 514         switch (kr.af) {
 515         case AF_INET:
 516                 kr.prefix.v4 = api.prefix.u.prefix4;
 517                 break;
 518         case AF_INET6:
 519                 kr.prefix.v6 = api.prefix.u.prefix6;
 520                 break;
 521         default:
 522                 break;
 523         }
 524         kr.prefixlen = api.prefix.prefixlen;
 525         kr.route_type = api.type;
 526         kr.route_instance = api.instance;
 527
 528         switch (api.type) {
 529         case ZEBRA_ROUTE_CONNECT:
 530                 SET_FLAG(kr.flags, F_CONNECTED);
 531                 break;
 532         case ZEBRA_ROUTE_BGP:
 533                 /* LDP should follow the IGP and ignore BGP routes */
 534                 return (0);
 535         default:
 536                 break;
 537         }
 538
 539         if (bad_addr(kr.af, &kr.prefix) ||
 540             (kr.af == AF_INET6 && IN6_IS_SCOPE_EMBED(&kr.prefix.v6)))
 541                 return (0);
 542
 543         if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
 544                 add = 1;
 545
 546         if (api.nexthop_num == 0)
 547                 debug_zebra_in("route %s %s/%d (%s)", (add) ? "add" : "delete",
 548                     log_addr(kr.af, &kr.prefix), kr.prefixlen,
 549                     zebra_route_string(api.type));
 550
 551         /* loop through all the nexthops */
 552         for (i = 0; i < api.nexthop_num; i++) {
 553                 api_nh = &api.nexthops[i];
 554                 switch (api_nh->type) {
 555                 case NEXTHOP_TYPE_IPV4:
 556                         if (kr.af != AF_INET)
 557                                 continue;
 558                         kr.nexthop.v4 = api_nh->gate.ipv4;
 559                         kr.ifindex = 0;
 560                         break;
 561                 case NEXTHOP_TYPE_IPV4_IFINDEX:
 562                         if (kr.af != AF_INET)
 563                                 continue;
 564                         kr.nexthop.v4 = api_nh->gate.ipv4;
 565                         kr.ifindex = api_nh->ifindex;
 566                         break;
 567                 case NEXTHOP_TYPE_IPV6:
 568                         if (kr.af != AF_INET6)
 569                                 continue;
 570                         kr.nexthop.v6 = api_nh->gate.ipv6;
 571                         kr.ifindex = 0;
 572                         break;
 573                 case NEXTHOP_TYPE_IPV6_IFINDEX:
 574                         if (kr.af != AF_INET6)
 575                                 continue;
 576                         kr.nexthop.v6 = api_nh->gate.ipv6;
 577                         kr.ifindex = api_nh->ifindex;
 578                         break;
 579                 case NEXTHOP_TYPE_IFINDEX:
 580                         if (!CHECK_FLAG(kr.flags, F_CONNECTED))
 581                                 continue;
 582                         break;
 583                 case NEXTHOP_TYPE_BLACKHOLE:
 584                         continue;
 585                 }
 586
 587                 debug_zebra_in("route %s %s/%d nexthop %s ifindex %u (%s)",
 588                     (add) ? "add" : "delete", log_addr(kr.af, &kr.prefix),
 589                     kr.prefixlen, log_addr(kr.af, &kr.nexthop), kr.ifindex,
 590                     zebra_route_string(api.type));
 591
 592                 if (add)
 593                         main_imsg_compose_lde(IMSG_NETWORK_ADD, 0, &kr, sizeof(kr));
 594         }
 595
 596         main_imsg_compose_lde(IMSG_NETWORK_UPDATE, 0, &kr, sizeof(kr));
 597
 598         return (0);
 599 }
 600
 601 /*
 602  * Receive PW status update from Zebra and send it to LDE process.
 603  */
 604 static int
 605 ldp_zebra_read_pw_status_update(ZAPI_CALLBACK_ARGS)
 606 {
 607         struct zapi_pw_status    zpw;
 608
 609         zebra_read_pw_status_update(cmd, zclient, length, vrf_id, &zpw);
 610
 611         debug_zebra_in("pseudowire %s status %s 0x%x", zpw.ifname,
 612             (zpw.status == PW_FORWARDING) ? "up" : "down",
 613             zpw.status);
 614
 615         main_imsg_compose_lde(IMSG_PW_UPDATE, 0, &zpw, sizeof(zpw));
 616
 617         return (0);
 618 }
 619
 620 void ldp_zebra_regdereg_zebra_info(bool want_register)
 621 {
 622         if (zebra_registered == want_register)
 623                 return;
 624
 625         log_debug("%s to receive default VRF information",
 626                   want_register ? "Register" : "De-register");
 627
 628         if (want_register) {
 629                 zclient_send_reg_requests(zclient, VRF_DEFAULT);
 630                 zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP,
 631                                         ZEBRA_ROUTE_ALL, 0, VRF_DEFAULT);
 632                 zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient,
 633                                         AFI_IP6, ZEBRA_ROUTE_ALL, 0,
 634                                         VRF_DEFAULT);
 635         } else {
 636                 zclient_send_dereg_requests(zclient, VRF_DEFAULT);
 637                 zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE, zclient,
 638                                         AFI_IP, ZEBRA_ROUTE_ALL, 0,
 639                                         VRF_DEFAULT);
 640                 zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE, zclient,
 641                                         AFI_IP6, ZEBRA_ROUTE_ALL, 0,
 642                                         VRF_DEFAULT);
 643         }
 644         zebra_registered = want_register;
 645 }
 646
 647 static void
 648 ldp_zebra_connected(struct zclient *zclient)
 649 {
 650         zebra_registered = false;
 651
 652         /* if MPLS was already enabled and we are re-connecting, register again
 653          */
 654         if (CHECK_FLAG(vty_conf->flags, F_LDPD_ENABLED))
 655                 ldp_zebra_regdereg_zebra_info(true);
 656
 657         ldp_zebra_opaque_register();
 658
 659         ldp_sync_zebra_init();
 660 }
 661
 662 static void
 663 ldp_zebra_filter_update(struct access_list *access)
 664 {
 665         struct ldp_access laccess;
 666
 667         if (access && access->name[0] != '\0') {
 668                 strlcpy(laccess.name, access->name, sizeof(laccess.name));
 669                 debug_evt("%s ACL update filter name %s", __func__, access->name);
 670
 671                 main_imsg_compose_both(IMSG_FILTER_UPDATE, &laccess, sizeof(laccess));
 672         }
 673 }
 674
 675 extern struct zebra_privs_t ldpd_privs;
 676
 677 static zclient_handler *const ldp_handlers[] = {
 678         [ZEBRA_ROUTER_ID_UPDATE] = ldp_router_id_update,
 679         [ZEBRA_INTERFACE_ADDRESS_ADD] = ldp_interface_address_add,
 680         [ZEBRA_INTERFACE_ADDRESS_DELETE] = ldp_interface_address_delete,
 681         [ZEBRA_REDISTRIBUTE_ROUTE_ADD] = ldp_zebra_read_route,
 682         [ZEBRA_REDISTRIBUTE_ROUTE_DEL] = ldp_zebra_read_route,
 683         [ZEBRA_PW_STATUS_UPDATE] = ldp_zebra_read_pw_status_update,
 684         [ZEBRA_OPAQUE_MESSAGE] = ldp_zebra_opaque_msg_handler,
 685 };
 686
 687 void ldp_zebra_init(struct event_loop *master)
 688 {
 689         if_zapi_callbacks(ldp_ifp_create, ldp_ifp_up, ldp_ifp_down, ldp_ifp_destroy);
 690
 691         /* Set default values. */
 692         zclient = zclient_new(master, &zclient_options_default, ldp_handlers,
 693                               array_size(ldp_handlers));
 694         zclient_init(zclient, ZEBRA_ROUTE_LDP, 0, &ldpd_privs);
 695
 696         /* set callbacks */
 697         zclient->zebra_connected = ldp_zebra_connected;
 698
 699         /* Access list initialize. */
 700         access_list_add_hook(ldp_zebra_filter_update);
 701         access_list_delete_hook(ldp_zebra_filter_update);
 702 }
 703
 704 void
 705 ldp_zebra_destroy(void)
 706 {
 707         ldp_zebra_opaque_unregister();
 708         zclient_stop(zclient);
 709         zclient_free(zclient);
 710         zclient = NULL;
 711 }