ldpd/l2vpn.c

   1 /*      $OpenBSD$ */
   2
   3 /*
   4  * Copyright (c) 2015 Renato Westphal <renato@openbsd.org>
   5  * Copyright (c) 2009 Michele Marchetto <michele@openbsd.org>
   6  * Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org>
   7  * Copyright (c) 2004, 2005, 2008 Esben Norby <norby@openbsd.org>
   8  *
   9  * Permission to use, copy, modify, and distribute this software for any
  10  * purpose with or without fee is hereby granted, provided that the above
  11  * copyright notice and this permission notice appear in all copies.
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  14  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  15  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  16  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  17  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  18  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  19  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  20  */
  21
  22 #include <zebra.h>
  23
  24 #include "ldpd.h"
  25 #include "ldpe.h"
  26 #include "lde.h"
  27 #include "log.h"
  28
  29 static void              l2vpn_pw_fec(struct l2vpn_pw *, struct fec *);
  30 static __inline int      l2vpn_compare(const struct l2vpn *, const struct l2vpn *);
  31 static __inline int      l2vpn_if_compare(const struct l2vpn_if *, const struct l2vpn_if *);
  32 static __inline int      l2vpn_pw_compare(const struct l2vpn_pw *, const struct l2vpn_pw *);
  33
  34 RB_GENERATE(l2vpn_head, l2vpn, entry, l2vpn_compare)
  35 RB_GENERATE(l2vpn_if_head, l2vpn_if, entry, l2vpn_if_compare)
  36 RB_GENERATE(l2vpn_pw_head, l2vpn_pw, entry, l2vpn_pw_compare)
  37
  38 static __inline int
  39 l2vpn_compare(const struct l2vpn *a, const struct l2vpn *b)
  40 {
  41         return (strcmp(a->name, b->name));
  42 }
  43
  44 struct l2vpn *
  45 l2vpn_new(const char *name)
  46 {
  47         struct l2vpn    *l2vpn;
  48
  49         if ((l2vpn = calloc(1, sizeof(*l2vpn))) == NULL)
  50                 fatal("l2vpn_new: calloc");
  51
  52         strlcpy(l2vpn->name, name, sizeof(l2vpn->name));
  53
  54         /* set default values */
  55         l2vpn->mtu = DEFAULT_L2VPN_MTU;
  56         l2vpn->pw_type = DEFAULT_PW_TYPE;
  57
  58         RB_INIT(l2vpn_if_head, &l2vpn->if_tree);
  59         RB_INIT(l2vpn_pw_head, &l2vpn->pw_tree);
  60         RB_INIT(l2vpn_pw_head, &l2vpn->pw_inactive_tree);
  61
  62         return (l2vpn);
  63 }
  64
  65 struct l2vpn *
  66 l2vpn_find(struct ldpd_conf *xconf, const char *name)
  67 {
  68         struct l2vpn     l2vpn;
  69         strlcpy(l2vpn.name, name, sizeof(l2vpn.name));
  70         return (RB_FIND(l2vpn_head, &xconf->l2vpn_tree, &l2vpn));
  71 }
  72
  73 void
  74 l2vpn_del(struct l2vpn *l2vpn)
  75 {
  76         struct l2vpn_if         *lif;
  77         struct l2vpn_pw         *pw;
  78
  79         while (!RB_EMPTY(l2vpn_if_head, &l2vpn->if_tree)) {
  80                 lif = RB_ROOT(l2vpn_if_head, &l2vpn->if_tree);
  81
  82                 RB_REMOVE(l2vpn_if_head, &l2vpn->if_tree, lif);
  83                 free(lif);
  84         }
  85         while (!RB_EMPTY(l2vpn_pw_head, &l2vpn->pw_tree)) {
  86                 pw = RB_ROOT(l2vpn_pw_head, &l2vpn->pw_tree);
  87
  88                 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_tree, pw);
  89                 free(pw);
  90         }
  91         while (!RB_EMPTY(l2vpn_pw_head, &l2vpn->pw_inactive_tree)) {
  92                 pw = RB_ROOT(l2vpn_pw_head, &l2vpn->pw_inactive_tree);
  93
  94                 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
  95                 free(pw);
  96         }
  97
  98         free(l2vpn);
  99 }
 100
 101 void
 102 l2vpn_init(struct l2vpn *l2vpn)
 103 {
 104         struct l2vpn_pw *pw;
 105
 106         RB_FOREACH(pw, l2vpn_pw_head, &l2vpn->pw_tree)
 107                 l2vpn_pw_init(pw);
 108 }
 109
 110 void
 111 l2vpn_exit(struct l2vpn *l2vpn)
 112 {
 113         struct l2vpn_pw         *pw;
 114
 115         RB_FOREACH(pw, l2vpn_pw_head, &l2vpn->pw_tree)
 116                 l2vpn_pw_exit(pw);
 117 }
 118
 119 static __inline int
 120 l2vpn_if_compare(const struct l2vpn_if *a, const struct l2vpn_if *b)
 121 {
 122         return if_cmp_name_func(a->ifname, b->ifname);
 123 }
 124
 125 struct l2vpn_if *
 126 l2vpn_if_new(struct l2vpn *l2vpn, const char *ifname)
 127 {
 128         struct l2vpn_if *lif;
 129
 130         if ((lif = calloc(1, sizeof(*lif))) == NULL)
 131                 fatal("l2vpn_if_new: calloc");
 132
 133         lif->l2vpn = l2vpn;
 134         strlcpy(lif->ifname, ifname, sizeof(lif->ifname));
 135
 136         return (lif);
 137 }
 138
 139 struct l2vpn_if *
 140 l2vpn_if_find(struct l2vpn *l2vpn, const char *ifname)
 141 {
 142         struct l2vpn_if  lif;
 143         strlcpy(lif.ifname, ifname, sizeof(lif.ifname));
 144         return (RB_FIND(l2vpn_if_head, &l2vpn->if_tree, &lif));
 145 }
 146
 147 void
 148 l2vpn_if_update_info(struct l2vpn_if *lif, struct kif *kif)
 149 {
 150         lif->ifindex = kif->ifindex;
 151         lif->operative = kif->operative;
 152         memcpy(lif->mac, kif->mac, sizeof(lif->mac));
 153 }
 154
 155 void
 156 l2vpn_if_update(struct l2vpn_if *lif)
 157 {
 158         struct l2vpn    *l2vpn = lif->l2vpn;
 159         struct l2vpn_pw *pw;
 160         struct map       fec;
 161         struct nbr      *nbr;
 162
 163         if (lif->operative)
 164                 return;
 165
 166         RB_FOREACH(pw, l2vpn_pw_head, &l2vpn->pw_tree) {
 167                 nbr = nbr_find_ldpid(pw->lsr_id.s_addr);
 168                 if (nbr == NULL)
 169                         continue;
 170
 171                 memset(&fec, 0, sizeof(fec));
 172                 fec.type = MAP_TYPE_PWID;
 173                 fec.fec.pwid.type = l2vpn->pw_type;
 174                 fec.fec.pwid.group_id = 0;
 175                 fec.flags |= F_MAP_PW_ID;
 176                 fec.fec.pwid.pwid = pw->pwid;
 177
 178                 send_mac_withdrawal(nbr, &fec, lif->mac);
 179         }
 180 }
 181
 182 static __inline int
 183 l2vpn_pw_compare(const struct l2vpn_pw *a, const struct l2vpn_pw *b)
 184 {
 185         return if_cmp_name_func(a->ifname, b->ifname);
 186 }
 187
 188 struct l2vpn_pw *
 189 l2vpn_pw_new(struct l2vpn *l2vpn, const char *ifname)
 190 {
 191         struct l2vpn_pw *pw;
 192
 193         if ((pw = calloc(1, sizeof(*pw))) == NULL)
 194                 fatal("l2vpn_pw_new: calloc");
 195
 196         pw->l2vpn = l2vpn;
 197         strlcpy(pw->ifname, ifname, sizeof(pw->ifname));
 198
 199         return (pw);
 200 }
 201
 202 struct l2vpn_pw *
 203 l2vpn_pw_find(struct l2vpn *l2vpn, const char *ifname)
 204 {
 205         struct l2vpn_pw *pw;
 206         struct l2vpn_pw  s;
 207
 208         strlcpy(s.ifname, ifname, sizeof(s.ifname));
 209         pw = RB_FIND(l2vpn_pw_head, &l2vpn->pw_tree, &s);
 210         if (pw)
 211                 return (pw);
 212         return (RB_FIND(l2vpn_pw_head, &l2vpn->pw_inactive_tree, &s));
 213 }
 214
 215 struct l2vpn_pw *
 216 l2vpn_pw_find_active(struct l2vpn *l2vpn, const char *ifname)
 217 {
 218         struct l2vpn_pw  s;
 219
 220         strlcpy(s.ifname, ifname, sizeof(s.ifname));
 221         return (RB_FIND(l2vpn_pw_head, &l2vpn->pw_tree, &s));
 222 }
 223
 224 struct l2vpn_pw *
 225 l2vpn_pw_find_inactive(struct l2vpn *l2vpn, const char *ifname)
 226 {
 227         struct l2vpn_pw  s;
 228
 229         strlcpy(s.ifname, ifname, sizeof(s.ifname));
 230         return (RB_FIND(l2vpn_pw_head, &l2vpn->pw_inactive_tree, &s));
 231 }
 232
 233 void
 234 l2vpn_pw_update_info(struct l2vpn_pw *pw, struct kif *kif)
 235 {
 236         pw->ifindex = kif->ifindex;
 237 }
 238
 239 void
 240 l2vpn_pw_init(struct l2vpn_pw *pw)
 241 {
 242         struct fec       fec;
 243         struct zapi_pw   zpw;
 244
 245         l2vpn_pw_reset(pw);
 246
 247         pw2zpw(pw, &zpw);
 248         lde_imsg_compose_parent(IMSG_KPW_ADD, 0, &zpw, sizeof(zpw));
 249
 250         l2vpn_pw_fec(pw, &fec);
 251         lde_kernel_insert(&fec, AF_INET, (union ldpd_addr*)&pw->lsr_id, 0, 0,
 252             0, 0, (void *)pw);
 253         lde_kernel_update(&fec);
 254 }
 255
 256 void
 257 l2vpn_pw_exit(struct l2vpn_pw *pw)
 258 {
 259         struct fec       fec;
 260         struct zapi_pw   zpw;
 261
 262         l2vpn_pw_fec(pw, &fec);
 263         lde_kernel_remove(&fec, AF_INET, (union ldpd_addr*)&pw->lsr_id, 0, 0, 0);
 264         lde_kernel_update(&fec);
 265
 266         pw2zpw(pw, &zpw);
 267         lde_imsg_compose_parent(IMSG_KPW_DELETE, 0, &zpw, sizeof(zpw));
 268 }
 269
 270 static void
 271 l2vpn_pw_fec(struct l2vpn_pw *pw, struct fec *fec)
 272 {
 273         memset(fec, 0, sizeof(*fec));
 274         fec->type = FEC_TYPE_PWID;
 275         fec->u.pwid.type = pw->l2vpn->pw_type;
 276         fec->u.pwid.pwid = pw->pwid;
 277         fec->u.pwid.lsr_id = pw->lsr_id;
 278 }
 279
 280 void
 281 l2vpn_pw_reset(struct l2vpn_pw *pw)
 282 {
 283         pw->remote_group = 0;
 284         pw->remote_mtu = 0;
 285         pw->local_status = PW_FORWARDING;
 286         pw->remote_status = PW_NOT_FORWARDING;
 287
 288         if (pw->flags & F_PW_CWORD_CONF)
 289                 pw->flags |= F_PW_CWORD;
 290         else
 291                 pw->flags &= ~F_PW_CWORD;
 292
 293         if (pw->flags & F_PW_STATUSTLV_CONF)
 294                 pw->flags |= F_PW_STATUSTLV;
 295         else
 296                 pw->flags &= ~F_PW_STATUSTLV;
 297 }
 298
 299 int
 300 l2vpn_pw_ok(struct l2vpn_pw *pw, struct fec_nh *fnh)
 301 {
 302         /* check for a remote label */
 303         if (fnh->remote_label == NO_LABEL) {
 304                 log_warnx("%s: pseudowire %s: no remote label", __func__,
 305                           pw->ifname);
 306                 pw->reason = F_PW_NO_REMOTE_LABEL;
 307                 return (0);
 308         }
 309
 310         /* MTUs must match */
 311         if (pw->l2vpn->mtu != pw->remote_mtu) {
 312                 log_warnx("%s: pseudowire %s: MTU mismatch detected", __func__,
 313                           pw->ifname);
 314                 pw->reason = F_PW_MTU_MISMATCH;
 315                 return (0);
 316         }
 317
 318         /* check pw status if applicable */
 319         if ((pw->flags & F_PW_STATUSTLV) &&
 320             pw->remote_status != PW_FORWARDING) {
 321                 log_warnx("%s: pseudowire %s: remote end is down", __func__,
 322                           pw->ifname);
 323                 pw->reason = F_PW_REMOTE_NOT_FWD;
 324                 return (0);
 325         }
 326
 327         pw->reason = F_PW_NO_ERR;
 328         return (1);
 329 }
 330
 331 int
 332 l2vpn_pw_negotiate(struct lde_nbr *ln, struct fec_node *fn, struct map *map)
 333 {
 334         struct l2vpn_pw         *pw;
 335         struct status_tlv        st;
 336
 337         /* NOTE: thanks martini & friends for all this mess */
 338
 339         pw = (struct l2vpn_pw *) fn->data;
 340         if (pw == NULL)
 341                 /*
 342                  * pseudowire not configured, return and record
 343                  * the mapping later
 344                  */
 345                 return (0);
 346
 347         /* RFC4447 - Section 6.2: control word negotiation */
 348         if (fec_find(&ln->sent_map, &fn->fec)) {
 349                 if ((map->flags & F_MAP_PW_CWORD) &&
 350                     !(pw->flags & F_PW_CWORD_CONF)) {
 351                         /* ignore the received label mapping */
 352                         return (1);
 353                 } else if (!(map->flags & F_MAP_PW_CWORD) &&
 354                     (pw->flags & F_PW_CWORD_CONF)) {
 355                         /* append a "Wrong C-bit" status code */
 356                         st.status_code = S_WRONG_CBIT;
 357                         st.msg_id = map->msg_id;
 358                         st.msg_type = htons(MSG_TYPE_LABELMAPPING);
 359                         lde_send_labelwithdraw(ln, fn, NULL, &st);
 360
 361                         pw->flags &= ~F_PW_CWORD;
 362                         lde_send_labelmapping(ln, fn, 1);
 363                 }
 364         } else if (map->flags & F_MAP_PW_CWORD) {
 365                 if (pw->flags & F_PW_CWORD_CONF)
 366                         pw->flags |= F_PW_CWORD;
 367                 else
 368                         /* act as if no label mapping had been received */
 369                         return (1);
 370         } else
 371                 pw->flags &= ~F_PW_CWORD;
 372
 373         /* RFC4447 - Section 5.4.3: pseudowire status negotiation */
 374         if (fec_find(&ln->recv_map, &fn->fec) == NULL &&
 375             !(map->flags & F_MAP_PW_STATUS))
 376                 pw->flags &= ~F_PW_STATUSTLV;
 377
 378         return (0);
 379 }
 380
 381 void
 382 l2vpn_send_pw_status(struct lde_nbr *ln, uint32_t status, struct fec *fec)
 383 {
 384         struct notify_msg        nm;
 385
 386         memset(&nm, 0, sizeof(nm));
 387         nm.status_code = S_PW_STATUS;
 388         nm.pw_status = status;
 389         nm.flags |= F_NOTIF_PW_STATUS;
 390         lde_fec2map(fec, &nm.fec);
 391         nm.flags |= F_NOTIF_FEC;
 392
 393         lde_imsg_compose_ldpe(IMSG_NOTIFICATION_SEND, ln->peerid, 0, &nm,
 394             sizeof(nm));
 395 }
 396
 397 void
 398 l2vpn_send_pw_status_wcard(struct lde_nbr *ln, uint32_t status,
 399     uint16_t pw_type, uint32_t group_id)
 400 {
 401         struct notify_msg        nm;
 402
 403         memset(&nm, 0, sizeof(nm));
 404         nm.status_code = S_PW_STATUS;
 405         nm.pw_status = status;
 406         nm.flags |= F_NOTIF_PW_STATUS;
 407         nm.fec.type = MAP_TYPE_PWID;
 408         nm.fec.fec.pwid.type = pw_type;
 409         nm.fec.fec.pwid.group_id = group_id;
 410         nm.flags |= F_NOTIF_FEC;
 411
 412         lde_imsg_compose_ldpe(IMSG_NOTIFICATION_SEND, ln->peerid, 0, &nm,
 413             sizeof(nm));
 414 }
 415
 416 void
 417 l2vpn_recv_pw_status(struct lde_nbr *ln, struct notify_msg *nm)
 418 {
 419         struct fec               fec;
 420         struct fec_node         *fn;
 421         struct fec_nh           *fnh;
 422         struct l2vpn_pw         *pw;
 423
 424         if (nm->fec.type == MAP_TYPE_TYPED_WCARD ||
 425             !(nm->fec.flags & F_MAP_PW_ID)) {
 426                 l2vpn_recv_pw_status_wcard(ln, nm);
 427                 return;
 428         }
 429
 430         lde_map2fec(&nm->fec, ln->id, &fec);
 431         fn = (struct fec_node *)fec_find(&ft, &fec);
 432         if (fn == NULL)
 433                 /* unknown fec */
 434                 return;
 435
 436         pw = (struct l2vpn_pw *) fn->data;
 437         if (pw == NULL)
 438                 return;
 439
 440         fnh = fec_nh_find(fn, AF_INET, (union ldpd_addr *)&ln->id, 0, 0, 0);
 441         if (fnh == NULL)
 442                 return;
 443
 444         /* remote status didn't change */
 445         if (pw->remote_status == nm->pw_status)
 446                 return;
 447         pw->remote_status = nm->pw_status;
 448
 449         if (l2vpn_pw_ok(pw, fnh))
 450                 lde_send_change_klabel(fn, fnh);
 451         else
 452                 lde_send_delete_klabel(fn, fnh);
 453 }
 454
 455 /* RFC4447 PWid group wildcard */
 456 void
 457 l2vpn_recv_pw_status_wcard(struct lde_nbr *ln, struct notify_msg *nm)
 458 {
 459         struct fec              *f;
 460         struct fec_node         *fn;
 461         struct fec_nh           *fnh;
 462         struct l2vpn_pw         *pw;
 463         struct map              *wcard = &nm->fec;
 464
 465         RB_FOREACH(f, fec_tree, &ft) {
 466                 fn = (struct fec_node *)f;
 467                 if (fn->fec.type != FEC_TYPE_PWID)
 468                         continue;
 469
 470                 pw = (struct l2vpn_pw *) fn->data;
 471                 if (pw == NULL)
 472                         continue;
 473
 474                 switch (wcard->type) {
 475                 case MAP_TYPE_TYPED_WCARD:
 476                         if (wcard->fec.twcard.u.pw_type != PW_TYPE_WILDCARD &&
 477                             wcard->fec.twcard.u.pw_type != fn->fec.u.pwid.type)
 478                                 continue;
 479                         break;
 480                 case MAP_TYPE_PWID:
 481                         if (wcard->fec.pwid.type != fn->fec.u.pwid.type)
 482                                 continue;
 483                         if (wcard->fec.pwid.group_id != pw->remote_group)
 484                                 continue;
 485                         break;
 486                 }
 487
 488                 fnh = fec_nh_find(fn, AF_INET, (union ldpd_addr *)&ln->id,
 489                     0, 0, 0);
 490                 if (fnh == NULL)
 491                         continue;
 492
 493                 /* remote status didn't change */
 494                 if (pw->remote_status == nm->pw_status)
 495                         continue;
 496                 pw->remote_status = nm->pw_status;
 497
 498                 if (l2vpn_pw_ok(pw, fnh))
 499                         lde_send_change_klabel(fn, fnh);
 500                 else
 501                         lde_send_delete_klabel(fn, fnh);
 502         }
 503 }
 504
 505 int
 506 l2vpn_pw_status_update(struct zapi_pw_status *zpw)
 507 {
 508         struct l2vpn            *l2vpn;
 509         struct l2vpn_pw         *pw = NULL;
 510         struct lde_nbr          *ln;
 511         struct fec               fec;
 512         uint32_t                 local_status;
 513
 514         RB_FOREACH(l2vpn, l2vpn_head, &ldeconf->l2vpn_tree) {
 515                 pw = l2vpn_pw_find(l2vpn, zpw->ifname);
 516                 if (pw)
 517                         break;
 518         }
 519         if (!pw) {
 520                 log_warnx("%s: pseudowire %s not found", __func__, zpw->ifname);
 521                 return (1);
 522         }
 523
 524         if (zpw->status == PW_STATUS_UP) {
 525                 local_status = PW_FORWARDING;
 526                 pw->reason = F_PW_NO_ERR;
 527         } else {
 528                 local_status = PW_NOT_FORWARDING;
 529                 pw->reason = F_PW_LOCAL_NOT_FWD;
 530         }
 531
 532         /* local status didn't change */
 533         if (pw->local_status == local_status)
 534                 return (0);
 535         pw->local_status = local_status;
 536
 537         /* notify remote peer about the status update */
 538         ln = lde_nbr_find_by_lsrid(pw->lsr_id);
 539         if (ln == NULL)
 540                 return (0);
 541         l2vpn_pw_fec(pw, &fec);
 542         if (pw->flags & F_PW_STATUSTLV)
 543                 l2vpn_send_pw_status(ln, local_status, &fec);
 544         else {
 545                 struct fec_node *fn;
 546                 fn = (struct fec_node *)fec_find(&ft, &fec);
 547                 if (fn) {
 548                         if (pw->local_status == PW_FORWARDING)
 549                                 lde_send_labelmapping(ln, fn, 1);
 550                         else
 551                                 lde_send_labelwithdraw(ln, fn, NULL, NULL);
 552                 }
 553         }
 554
 555         return (0);
 556 }
 557
 558 void
 559 l2vpn_pw_ctl(pid_t pid)
 560 {
 561         struct l2vpn            *l2vpn;
 562         struct l2vpn_pw         *pw;
 563         static struct ctl_pw     pwctl;
 564
 565         RB_FOREACH(l2vpn, l2vpn_head, &ldeconf->l2vpn_tree)
 566                 RB_FOREACH(pw, l2vpn_pw_head, &l2vpn->pw_tree) {
 567                         memset(&pwctl, 0, sizeof(pwctl));
 568                         strlcpy(pwctl.l2vpn_name, pw->l2vpn->name,
 569                             sizeof(pwctl.l2vpn_name));
 570                         strlcpy(pwctl.ifname, pw->ifname,
 571                             sizeof(pwctl.ifname));
 572                         pwctl.pwid = pw->pwid;
 573                         pwctl.lsr_id = pw->lsr_id;
 574                         if (pw->enabled &&
 575                             pw->local_status == PW_FORWARDING &&
 576                             pw->remote_status == PW_FORWARDING)
 577                                 pwctl.status = 1;
 578
 579                         lde_imsg_compose_ldpe(IMSG_CTL_SHOW_L2VPN_PW, 0,
 580                             pid, &pwctl, sizeof(pwctl));
 581                 }
 582 }
 583
 584 void
 585 l2vpn_binding_ctl(pid_t pid)
 586 {
 587         struct fec              *f;
 588         struct fec_node         *fn;
 589         struct lde_map          *me;
 590         struct l2vpn_pw         *pw;
 591         static struct ctl_pw     pwctl;
 592
 593         RB_FOREACH(f, fec_tree, &ft) {
 594                 if (f->type != FEC_TYPE_PWID)
 595                         continue;
 596
 597                 fn = (struct fec_node *)f;
 598                 if (fn->local_label == NO_LABEL &&
 599                     RB_EMPTY(lde_map_head, &fn->downstream))
 600                         continue;
 601
 602                 memset(&pwctl, 0, sizeof(pwctl));
 603                 pwctl.type = f->u.pwid.type;
 604                 pwctl.pwid = f->u.pwid.pwid;
 605                 pwctl.lsr_id = f->u.pwid.lsr_id;
 606
 607                 pw = (struct l2vpn_pw *) fn->data;
 608                 if (pw) {
 609                         pwctl.local_label = fn->local_label;
 610                         pwctl.local_gid = 0;
 611                         pwctl.local_ifmtu = pw->l2vpn->mtu;
 612                         pwctl.local_cword = (pw->flags & F_PW_CWORD_CONF) ?
 613                             1 : 0;
 614                         pwctl.reason = pw->reason;
 615                 } else
 616                         pwctl.local_label = NO_LABEL;
 617
 618                 RB_FOREACH(me, lde_map_head, &fn->downstream)
 619                         if (f->u.pwid.lsr_id.s_addr == me->nexthop->id.s_addr)
 620                                 break;
 621
 622                 if (me) {
 623                         pwctl.remote_label = me->map.label;
 624                         pwctl.remote_gid = me->map.fec.pwid.group_id;
 625                         if (me->map.flags & F_MAP_PW_IFMTU)
 626                                 pwctl.remote_ifmtu = me->map.fec.pwid.ifmtu;
 627                         if (pw)
 628                                 pwctl.remote_cword = (pw->flags & F_PW_CWORD) ?
 629                                     1 : 0;
 630
 631                         lde_imsg_compose_ldpe(IMSG_CTL_SHOW_L2VPN_BINDING,
 632                             0, pid, &pwctl, sizeof(pwctl));
 633                 } else if (pw) {
 634                         pwctl.remote_label = NO_LABEL;
 635
 636                         lde_imsg_compose_ldpe(IMSG_CTL_SHOW_L2VPN_BINDING,
 637                             0, pid, &pwctl, sizeof(pwctl));
 638                 }
 639         }
 640 }
 641
 642 /* ldpe */
 643
 644 void
 645 ldpe_l2vpn_init(struct l2vpn *l2vpn)
 646 {
 647         struct l2vpn_pw         *pw;
 648
 649         RB_FOREACH(pw, l2vpn_pw_head, &l2vpn->pw_tree)
 650                 ldpe_l2vpn_pw_init(pw);
 651 }
 652
 653 void
 654 ldpe_l2vpn_exit(struct l2vpn *l2vpn)
 655 {
 656         struct l2vpn_pw         *pw;
 657
 658         RB_FOREACH(pw, l2vpn_pw_head, &l2vpn->pw_tree)
 659                 ldpe_l2vpn_pw_exit(pw);
 660 }
 661
 662 void
 663 ldpe_l2vpn_pw_init(struct l2vpn_pw *pw)
 664 {
 665         struct tnbr             *tnbr;
 666
 667         tnbr = tnbr_find(leconf, pw->af, &pw->addr);
 668         if (tnbr == NULL) {
 669                 tnbr = tnbr_new(pw->af, &pw->addr);
 670                 tnbr_update(tnbr);
 671                 RB_INSERT(tnbr_head, &leconf->tnbr_tree, tnbr);
 672         }
 673
 674         tnbr->pw_count++;
 675 }
 676
 677 void
 678 ldpe_l2vpn_pw_exit(struct l2vpn_pw *pw)
 679 {
 680         struct tnbr             *tnbr;
 681
 682         tnbr = tnbr_find(leconf, pw->af, &pw->addr);
 683         if (tnbr) {
 684                 tnbr->pw_count--;
 685                 tnbr_check(leconf, tnbr);
 686         }
 687 }