zebra/zebra_pw.c

   1 /* Zebra PW code
   2  * Copyright (C) 2016 Volta Networks, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; see the file COPYING; if not, write to the
  16  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
  17  * MA 02110-1301 USA
  18  */
  19
  20 #include <zebra.h>
  21
  22 #include "log.h"
  23 #include "memory.h"
  24 #include "thread.h"
  25 #include "command.h"
  26 #include "vrf.h"
  27 #include "lib/json.h"
  28 #include "printfrr.h"
  29
  30 #include "zebra/debug.h"
  31 #include "zebra/rib.h"
  32 #include "zebra/zebra_router.h"
  33 #include "zebra/zapi_msg.h"
  34 #include "zebra/zebra_rnh.h"
  35 #include "zebra/zebra_vrf.h"
  36 #include "zebra/zebra_pw.h"
  37
  38 DEFINE_MTYPE_STATIC(LIB, PW, "Pseudowire");
  39
  40 DEFINE_QOBJ_TYPE(zebra_pw);
  41
  42 DEFINE_HOOK(pw_install, (struct zebra_pw * pw), (pw));
  43 DEFINE_HOOK(pw_uninstall, (struct zebra_pw * pw), (pw));
  44
  45 #define MPLS_NO_LABEL MPLS_INVALID_LABEL
  46
  47 static int zebra_pw_enabled(struct zebra_pw *);
  48 static void zebra_pw_install(struct zebra_pw *);
  49 static void zebra_pw_uninstall(struct zebra_pw *);
  50 static void zebra_pw_install_retry(struct thread *thread);
  51 static int zebra_pw_check_reachability(const struct zebra_pw *);
  52 static void zebra_pw_update_status(struct zebra_pw *, int);
  53
  54 static inline int zebra_pw_compare(const struct zebra_pw *a,
  55                                    const struct zebra_pw *b)
  56 {
  57         return (strcmp(a->ifname, b->ifname));
  58 }
  59
  60 RB_GENERATE(zebra_pw_head, zebra_pw, pw_entry, zebra_pw_compare)
  61 RB_GENERATE(zebra_static_pw_head, zebra_pw, static_pw_entry, zebra_pw_compare)
  62
  63 struct zebra_pw *zebra_pw_add(struct zebra_vrf *zvrf, const char *ifname,
  64                               uint8_t protocol, struct zserv *client)
  65 {
  66         struct zebra_pw *pw;
  67
  68         if (IS_ZEBRA_DEBUG_PW)
  69                 zlog_debug("%u: adding pseudowire %s protocol %s",
  70                            zvrf_id(zvrf), ifname, zebra_route_string(protocol));
  71
  72         pw = XCALLOC(MTYPE_PW, sizeof(*pw));
  73         strlcpy(pw->ifname, ifname, sizeof(pw->ifname));
  74         pw->protocol = protocol;
  75         pw->vrf_id = zvrf_id(zvrf);
  76         pw->client = client;
  77         pw->status = PW_NOT_FORWARDING;
  78         pw->local_label = MPLS_NO_LABEL;
  79         pw->remote_label = MPLS_NO_LABEL;
  80         pw->flags = F_PSEUDOWIRE_CWORD;
  81
  82         RB_INSERT(zebra_pw_head, &zvrf->pseudowires, pw);
  83         if (pw->protocol == ZEBRA_ROUTE_STATIC) {
  84                 RB_INSERT(zebra_static_pw_head, &zvrf->static_pseudowires, pw);
  85                 QOBJ_REG(pw, zebra_pw);
  86         }
  87
  88         return pw;
  89 }
  90
  91 void zebra_pw_del(struct zebra_vrf *zvrf, struct zebra_pw *pw)
  92 {
  93         if (IS_ZEBRA_DEBUG_PW)
  94                 zlog_debug("%u: deleting pseudowire %s protocol %s", pw->vrf_id,
  95                            pw->ifname, zebra_route_string(pw->protocol));
  96
  97         /* remove nexthop tracking */
  98         zebra_deregister_rnh_pseudowire(pw->vrf_id, pw);
  99
 100         /* uninstall */
 101         if (pw->status == PW_FORWARDING) {
 102                 hook_call(pw_uninstall, pw);
 103                 dplane_pw_uninstall(pw);
 104         } else if (pw->install_retry_timer)
 105                 thread_cancel(&pw->install_retry_timer);
 106
 107         /* unlink and release memory */
 108         RB_REMOVE(zebra_pw_head, &zvrf->pseudowires, pw);
 109         if (pw->protocol == ZEBRA_ROUTE_STATIC)
 110                 RB_REMOVE(zebra_static_pw_head, &zvrf->static_pseudowires, pw);
 111         XFREE(MTYPE_PW, pw);
 112 }
 113
 114 void zebra_pw_change(struct zebra_pw *pw, ifindex_t ifindex, int type, int af,
 115                      union g_addr *nexthop, uint32_t local_label,
 116                      uint32_t remote_label, uint8_t flags,
 117                      union pw_protocol_fields *data)
 118 {
 119         pw->ifindex = ifindex;
 120         pw->type = type;
 121         pw->af = af;
 122         pw->nexthop = *nexthop;
 123         pw->local_label = local_label;
 124         pw->remote_label = remote_label;
 125         pw->flags = flags;
 126         pw->data = *data;
 127
 128         if (zebra_pw_enabled(pw)) {
 129                 bool nht_exists;
 130                 zebra_register_rnh_pseudowire(pw->vrf_id, pw, &nht_exists);
 131                 if (nht_exists)
 132                         zebra_pw_update(pw);
 133         } else {
 134                 if (pw->protocol == ZEBRA_ROUTE_STATIC)
 135                         zebra_deregister_rnh_pseudowire(pw->vrf_id, pw);
 136                 zebra_pw_uninstall(pw);
 137         }
 138 }
 139
 140 struct zebra_pw *zebra_pw_find(struct zebra_vrf *zvrf, const char *ifname)
 141 {
 142         struct zebra_pw pw;
 143         strlcpy(pw.ifname, ifname, sizeof(pw.ifname));
 144         return (RB_FIND(zebra_pw_head, &zvrf->pseudowires, &pw));
 145 }
 146
 147 static int zebra_pw_enabled(struct zebra_pw *pw)
 148 {
 149         if (pw->protocol == ZEBRA_ROUTE_STATIC) {
 150                 if (pw->local_label == MPLS_NO_LABEL
 151                     || pw->remote_label == MPLS_NO_LABEL || pw->af == AF_UNSPEC)
 152                         return 0;
 153                 return 1;
 154         } else
 155                 return pw->enabled;
 156 }
 157
 158 void zebra_pw_update(struct zebra_pw *pw)
 159 {
 160         if (zebra_pw_check_reachability(pw) < 0) {
 161                 zebra_pw_uninstall(pw);
 162                 zebra_pw_install_failure(pw, PW_NOT_FORWARDING);
 163                 /* wait for NHT and try again later */
 164         } else {
 165                 /*
 166                  * Install or reinstall the pseudowire (e.g. to update
 167                  * parameters like the nexthop or the use of the control word).
 168                  */
 169                 zebra_pw_install(pw);
 170         }
 171 }
 172
 173 static void zebra_pw_install(struct zebra_pw *pw)
 174 {
 175         if (IS_ZEBRA_DEBUG_PW)
 176                 zlog_debug("%u: installing pseudowire %s protocol %s",
 177                            pw->vrf_id, pw->ifname,
 178                            zebra_route_string(pw->protocol));
 179
 180         hook_call(pw_install, pw);
 181         if (dplane_pw_install(pw) == ZEBRA_DPLANE_REQUEST_FAILURE) {
 182                 zebra_pw_install_failure(pw, PW_NOT_FORWARDING);
 183                 return;
 184         }
 185
 186         if (pw->status != PW_FORWARDING)
 187                 zebra_pw_update_status(pw, PW_FORWARDING);
 188 }
 189
 190 static void zebra_pw_uninstall(struct zebra_pw *pw)
 191 {
 192         if (pw->status != PW_FORWARDING)
 193                 return;
 194
 195         if (IS_ZEBRA_DEBUG_PW)
 196                 zlog_debug("%u: uninstalling pseudowire %s protocol %s",
 197                            pw->vrf_id, pw->ifname,
 198                            zebra_route_string(pw->protocol));
 199
 200         /* ignore any possible error */
 201         hook_call(pw_uninstall, pw);
 202         dplane_pw_uninstall(pw);
 203
 204         if (zebra_pw_enabled(pw))
 205                 zebra_pw_update_status(pw, PW_NOT_FORWARDING);
 206 }
 207
 208 /*
 209  * Installation of the pseudowire in the kernel or hardware has failed. This
 210  * function will notify the pseudowire client about the failure and schedule
 211  * to retry the installation later. This function can be called by an external
 212  * agent that performs the pseudowire installation in an asynchronous way.
 213  */
 214 void zebra_pw_install_failure(struct zebra_pw *pw, int pwstatus)
 215 {
 216         if (IS_ZEBRA_DEBUG_PW)
 217                 zlog_debug(
 218                         "%u: failed installing pseudowire %s, scheduling retry in %u seconds",
 219                         pw->vrf_id, pw->ifname, PW_INSTALL_RETRY_INTERVAL);
 220
 221         /* schedule to retry later */
 222         thread_cancel(&pw->install_retry_timer);
 223         thread_add_timer(zrouter.master, zebra_pw_install_retry, pw,
 224                          PW_INSTALL_RETRY_INTERVAL, &pw->install_retry_timer);
 225
 226         zebra_pw_update_status(pw, pwstatus);
 227 }
 228
 229 static void zebra_pw_install_retry(struct thread *thread)
 230 {
 231         struct zebra_pw *pw = THREAD_ARG(thread);
 232
 233         pw->install_retry_timer = NULL;
 234         zebra_pw_install(pw);
 235 }
 236
 237 static void zebra_pw_update_status(struct zebra_pw *pw, int status)
 238 {
 239         pw->status = status;
 240         if (pw->client)
 241                 zsend_pw_update(pw->client, pw);
 242 }
 243
 244 static int zebra_pw_check_reachability_strict(const struct zebra_pw *pw,
 245                                               struct route_entry *re)
 246 {
 247         const struct nexthop *nexthop;
 248         const struct nexthop_group *nhg;
 249         bool found_p = false;
 250         bool fail_p = false;
 251
 252         /* TODO: consider GRE/L2TPv3 tunnels in addition to MPLS LSPs */
 253
 254         /* All active nexthops must be labelled; look at
 255          * primary and backup fib lists, in case there's been
 256          * a backup nexthop activation.
 257          */
 258         nhg = rib_get_fib_nhg(re);
 259         if (nhg && nhg->nexthop) {
 260                 for (ALL_NEXTHOPS_PTR(nhg, nexthop)) {
 261                         if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE))
 262                                 continue;
 263
 264                         if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) {
 265                                 if (nexthop->nh_label != NULL)
 266                                         found_p = true;
 267                                 else {
 268                                         fail_p = true;
 269                                         break;
 270                                 }
 271                         }
 272                 }
 273         }
 274
 275         if (fail_p)
 276                 goto done;
 277
 278         nhg = rib_get_fib_backup_nhg(re);
 279         if (nhg && nhg->nexthop) {
 280                 for (ALL_NEXTHOPS_PTR(nhg, nexthop)) {
 281                         if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE))
 282                                 continue;
 283
 284                         if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) {
 285                                 if (nexthop->nh_label != NULL)
 286                                         found_p = true;
 287                                 else {
 288                                         fail_p = true;
 289                                         break;
 290                                 }
 291                         }
 292                 }
 293         }
 294
 295 done:
 296
 297         if (fail_p || !found_p) {
 298                 if (IS_ZEBRA_DEBUG_PW)
 299                         zlog_debug("%s: unlabeled route for %s",
 300                                    __func__, pw->ifname);
 301                 return -1;
 302         }
 303
 304         return 0;
 305 }
 306
 307 static int zebra_pw_check_reachability(const struct zebra_pw *pw)
 308 {
 309         struct route_entry *re;
 310         const struct nexthop *nexthop;
 311         const struct nexthop_group *nhg;
 312         bool found_p = false;
 313
 314         /* TODO: consider GRE/L2TPv3 tunnels in addition to MPLS LSPs */
 315
 316         /* Find route to the remote end of the pseudowire */
 317         re = rib_match(family2afi(pw->af), SAFI_UNICAST, pw->vrf_id,
 318                        &pw->nexthop, NULL);
 319         if (!re) {
 320                 if (IS_ZEBRA_DEBUG_PW)
 321                         zlog_debug("%s: no route found for %s", __func__,
 322                                    pw->ifname);
 323                 return -1;
 324         }
 325
 326         /* Stricter checking for some OSes (OBSD, e.g.) */
 327         if (mpls_pw_reach_strict)
 328                 return zebra_pw_check_reachability_strict(pw, re);
 329
 330         /* There must be at least one installed labelled nexthop;
 331          * look at primary and backup fib lists, in case there's been
 332          * a backup nexthop activation.
 333          */
 334         nhg = rib_get_fib_nhg(re);
 335         if (nhg && nhg->nexthop) {
 336                 for (ALL_NEXTHOPS_PTR(nhg, nexthop)) {
 337                         if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE))
 338                                 continue;
 339
 340                         if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE) &&
 341                             nexthop->nh_label != NULL) {
 342                                 found_p = true;
 343                                 break;
 344                         }
 345                 }
 346         }
 347
 348         if (found_p)
 349                 return 0;
 350
 351         nhg = rib_get_fib_backup_nhg(re);
 352         if (nhg && nhg->nexthop) {
 353                 for (ALL_NEXTHOPS_PTR(nhg, nexthop)) {
 354                         if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE))
 355                                 continue;
 356
 357                         if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE) &&
 358                             nexthop->nh_label != NULL) {
 359                                 found_p = true;
 360                                 break;
 361                         }
 362                 }
 363         }
 364
 365         if (!found_p) {
 366                 if (IS_ZEBRA_DEBUG_PW)
 367                         zlog_debug("%s: unlabeled route for %s",
 368                                    __func__, pw->ifname);
 369                 return -1;
 370         }
 371
 372         return 0;
 373 }
 374
 375 static int zebra_pw_client_close(struct zserv *client)
 376 {
 377         struct vrf *vrf;
 378         struct zebra_vrf *zvrf;
 379         struct zebra_pw *pw, *tmp;
 380
 381         RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) {
 382                 zvrf = vrf->info;
 383                 RB_FOREACH_SAFE (pw, zebra_pw_head, &zvrf->pseudowires, tmp) {
 384                         if (pw->client != client)
 385                                 continue;
 386                         zebra_pw_del(zvrf, pw);
 387                 }
 388         }
 389
 390         return 0;
 391 }
 392
 393 void zebra_pw_init(struct zebra_vrf *zvrf)
 394 {
 395         RB_INIT(zebra_pw_head, &zvrf->pseudowires);
 396         RB_INIT(zebra_static_pw_head, &zvrf->static_pseudowires);
 397
 398         hook_register(zserv_client_close, zebra_pw_client_close);
 399 }
 400
 401 void zebra_pw_exit(struct zebra_vrf *zvrf)
 402 {
 403         struct zebra_pw *pw;
 404
 405         while (!RB_EMPTY(zebra_pw_head, &zvrf->pseudowires)) {
 406                 pw = RB_ROOT(zebra_pw_head, &zvrf->pseudowires);
 407
 408                 zebra_pw_del(zvrf, pw);
 409         }
 410 }
 411
 412 DEFUN_NOSH (pseudowire_if,
 413             pseudowire_if_cmd,
 414             "pseudowire IFNAME",
 415             "Static pseudowire configuration\n"
 416             "Pseudowire name\n")
 417 {
 418         struct zebra_vrf *zvrf;
 419         struct zebra_pw *pw;
 420         const char *ifname;
 421         int idx = 0;
 422
 423         zvrf = vrf_info_lookup(VRF_DEFAULT);
 424         if (!zvrf)
 425                 return CMD_WARNING;
 426
 427         argv_find(argv, argc, "IFNAME", &idx);
 428         ifname = argv[idx]->arg;
 429
 430         pw = zebra_pw_find(zvrf, ifname);
 431         if (pw && pw->protocol != ZEBRA_ROUTE_STATIC) {
 432                 vty_out(vty, "%% Pseudowire is not static\n");
 433                 return CMD_WARNING;
 434         }
 435
 436         if (!pw)
 437                 pw = zebra_pw_add(zvrf, ifname, ZEBRA_ROUTE_STATIC, NULL);
 438         VTY_PUSH_CONTEXT(PW_NODE, pw);
 439
 440         return CMD_SUCCESS;
 441 }
 442
 443 DEFUN (no_pseudowire_if,
 444        no_pseudowire_if_cmd,
 445        "no pseudowire IFNAME",
 446        NO_STR
 447        "Static pseudowire configuration\n"
 448        "Pseudowire name\n")
 449 {
 450         struct zebra_vrf *zvrf;
 451         struct zebra_pw *pw;
 452         const char *ifname;
 453         int idx = 0;
 454
 455         zvrf = vrf_info_lookup(VRF_DEFAULT);
 456         if (!zvrf)
 457                 return CMD_WARNING;
 458
 459         argv_find(argv, argc, "IFNAME", &idx);
 460         ifname = argv[idx]->arg;
 461
 462         pw = zebra_pw_find(zvrf, ifname);
 463         if (pw) {
 464                 if (pw->protocol != ZEBRA_ROUTE_STATIC) {
 465                         vty_out(vty, "%% Pseudowire is not static\n");
 466                         return CMD_WARNING;
 467                 }
 468                 zebra_pw_del(zvrf, pw);
 469         }
 470
 471         return CMD_SUCCESS;
 472 }
 473
 474 DEFUN (pseudowire_labels,
 475        pseudowire_labels_cmd,
 476        "[no] mpls label local (16-1048575) remote (16-1048575)",
 477        NO_STR
 478        "MPLS L2VPN PW command\n"
 479        "MPLS L2VPN static labels\n"
 480        "Local pseudowire label\n"
 481        "Local pseudowire label\n"
 482        "Remote pseudowire label\n"
 483        "Remote pseudowire label\n")
 484 {
 485         VTY_DECLVAR_CONTEXT(zebra_pw, pw);
 486         int idx = 0;
 487         mpls_label_t local_label, remote_label;
 488
 489         if (argv_find(argv, argc, "no", &idx)) {
 490                 local_label = MPLS_NO_LABEL;
 491                 remote_label = MPLS_NO_LABEL;
 492         } else {
 493                 argv_find(argv, argc, "local", &idx);
 494                 local_label = atoi(argv[idx + 1]->arg);
 495                 argv_find(argv, argc, "remote", &idx);
 496                 remote_label = atoi(argv[idx + 1]->arg);
 497         }
 498
 499         zebra_pw_change(pw, pw->ifindex, pw->type, pw->af, &pw->nexthop,
 500                         local_label, remote_label, pw->flags, &pw->data);
 501
 502         return CMD_SUCCESS;
 503 }
 504
 505 DEFUN (pseudowire_neighbor,
 506        pseudowire_neighbor_cmd,
 507        "[no] neighbor <A.B.C.D|X:X::X:X>",
 508        NO_STR
 509        "Specify the IPv4 or IPv6 address of the remote endpoint\n"
 510        "IPv4 address\n"
 511        "IPv6 address\n")
 512 {
 513         VTY_DECLVAR_CONTEXT(zebra_pw, pw);
 514         int idx = 0;
 515         const char *address;
 516         int af;
 517         union g_addr nexthop;
 518
 519         af = AF_UNSPEC;
 520         memset(&nexthop, 0, sizeof(nexthop));
 521
 522         if (!argv_find(argv, argc, "no", &idx)) {
 523                 argv_find(argv, argc, "neighbor", &idx);
 524                 address = argv[idx + 1]->arg;
 525
 526                 if (inet_pton(AF_INET, address, &nexthop.ipv4) == 1)
 527                         af = AF_INET;
 528                 else if (inet_pton(AF_INET6, address, &nexthop.ipv6) == 1)
 529                         af = AF_INET6;
 530                 else {
 531                         vty_out(vty, "%% Malformed address\n");
 532                         return CMD_WARNING;
 533                 }
 534         }
 535
 536         zebra_pw_change(pw, pw->ifindex, pw->type, af, &nexthop,
 537                         pw->local_label, pw->remote_label, pw->flags,
 538                         &pw->data);
 539
 540         return CMD_SUCCESS;
 541 }
 542
 543 DEFUN (pseudowire_control_word,
 544        pseudowire_control_word_cmd,
 545        "[no] control-word <exclude|include>",
 546        NO_STR
 547        "Control-word options\n"
 548        "Exclude control-word in pseudowire packets\n"
 549        "Include control-word in pseudowire packets\n")
 550 {
 551         VTY_DECLVAR_CONTEXT(zebra_pw, pw);
 552         int idx = 0;
 553         uint8_t flags = 0;
 554
 555         if (argv_find(argv, argc, "no", &idx))
 556                 flags = F_PSEUDOWIRE_CWORD;
 557         else {
 558                 argv_find(argv, argc, "control-word", &idx);
 559                 if (argv[idx + 1]->text[0] == 'i')
 560                         flags = F_PSEUDOWIRE_CWORD;
 561         }
 562
 563         zebra_pw_change(pw, pw->ifindex, pw->type, pw->af, &pw->nexthop,
 564                         pw->local_label, pw->remote_label, flags, &pw->data);
 565
 566         return CMD_SUCCESS;
 567 }
 568
 569 DEFUN (show_pseudowires,
 570        show_pseudowires_cmd,
 571        "show mpls pseudowires",
 572        SHOW_STR
 573        MPLS_STR
 574        "Pseudowires\n")
 575 {
 576         struct zebra_vrf *zvrf;
 577         struct zebra_pw *pw;
 578
 579         zvrf = vrf_info_lookup(VRF_DEFAULT);
 580         if (!zvrf)
 581                 return 0;
 582
 583         vty_out(vty, "%-16s %-24s %-12s %-8s %-10s\n", "Interface", "Neighbor",
 584                 "Labels", "Protocol", "Status");
 585
 586         RB_FOREACH (pw, zebra_pw_head, &zvrf->pseudowires) {
 587                 char buf_nbr[INET6_ADDRSTRLEN];
 588                 char buf_labels[64];
 589
 590                 inet_ntop(pw->af, &pw->nexthop, buf_nbr, sizeof(buf_nbr));
 591
 592                 if (pw->local_label != MPLS_NO_LABEL
 593                     && pw->remote_label != MPLS_NO_LABEL)
 594                         snprintf(buf_labels, sizeof(buf_labels), "%u/%u",
 595                                  pw->local_label, pw->remote_label);
 596                 else
 597                         snprintf(buf_labels, sizeof(buf_labels), "-");
 598
 599                 vty_out(vty, "%-16s %-24s %-12s %-8s %-10s\n", pw->ifname,
 600                         (pw->af != AF_UNSPEC) ? buf_nbr : "-", buf_labels,
 601                         zebra_route_string(pw->protocol),
 602                         (zebra_pw_enabled(pw) && pw->status == PW_FORWARDING)
 603                                 ? "UP"
 604                                 : "DOWN");
 605         }
 606
 607         return CMD_SUCCESS;
 608 }
 609
 610 static void vty_show_mpls_pseudowire_detail(struct vty *vty)
 611 {
 612         struct zebra_vrf *zvrf;
 613         struct zebra_pw *pw;
 614         struct route_entry *re;
 615         struct nexthop *nexthop;
 616         struct nexthop_group *nhg;
 617
 618         zvrf = vrf_info_lookup(VRF_DEFAULT);
 619         if (!zvrf)
 620                 return;
 621
 622         RB_FOREACH (pw, zebra_pw_head, &zvrf->pseudowires) {
 623                 char buf_nbr[INET6_ADDRSTRLEN];
 624                 char buf_nh[100];
 625
 626                 vty_out(vty, "Interface: %s\n", pw->ifname);
 627                 inet_ntop(pw->af, &pw->nexthop, buf_nbr, sizeof(buf_nbr));
 628                 vty_out(vty, "  Neighbor: %s\n",
 629                         (pw->af != AF_UNSPEC) ? buf_nbr : "-");
 630                 if (pw->local_label != MPLS_NO_LABEL)
 631                         vty_out(vty, "  Local Label: %u\n", pw->local_label);
 632                 else
 633                         vty_out(vty, "  Local Label: %s\n", "-");
 634                 if (pw->remote_label != MPLS_NO_LABEL)
 635                         vty_out(vty, "  Remote Label: %u\n", pw->remote_label);
 636                 else
 637                         vty_out(vty, "  Remote Label: %s\n", "-");
 638                 vty_out(vty, "  Protocol: %s\n",
 639                         zebra_route_string(pw->protocol));
 640                 if (pw->protocol == ZEBRA_ROUTE_LDP)
 641                         vty_out(vty, "  VC-ID: %u\n", pw->data.ldp.pwid);
 642                 vty_out(vty, "  Status: %s \n",
 643                         (zebra_pw_enabled(pw) && pw->status == PW_FORWARDING)
 644                         ? "Up"
 645                         : "Down");
 646                 re = rib_match(family2afi(pw->af), SAFI_UNICAST, pw->vrf_id,
 647                                &pw->nexthop, NULL);
 648                 if (re == NULL)
 649                         continue;
 650
 651                 nhg = rib_get_fib_nhg(re);
 652                 for (ALL_NEXTHOPS_PTR(nhg, nexthop)) {
 653                         snprintfrr(buf_nh, sizeof(buf_nh), "%pNHv",
 654                                    nexthop);
 655                         vty_out(vty, "  Next Hop: %s\n", buf_nh);
 656                         if (nexthop->nh_label)
 657                                 vty_out(vty, "  Next Hop label: %u\n",
 658                                         nexthop->nh_label->label[0]);
 659                         else
 660                                 vty_out(vty, "  Next Hop label: %s\n",
 661                                         "-");
 662                 }
 663
 664                 /* Include any installed backups */
 665                 nhg = rib_get_fib_backup_nhg(re);
 666                 if (nhg == NULL)
 667                         continue;
 668
 669                 for (ALL_NEXTHOPS_PTR(nhg, nexthop)) {
 670                         snprintfrr(buf_nh, sizeof(buf_nh), "%pNHv",
 671                                    nexthop);
 672                         vty_out(vty, "  Next Hop: %s\n", buf_nh);
 673                         if (nexthop->nh_label)
 674                                 vty_out(vty, "  Next Hop label: %u\n",
 675                                         nexthop->nh_label->label[0]);
 676                         else
 677                                 vty_out(vty, "  Next Hop label: %s\n",
 678                                         "-");
 679                 }
 680         }
 681 }
 682
 683 static void vty_show_mpls_pseudowire(struct zebra_pw *pw, json_object *json_pws)
 684 {
 685         struct route_entry *re;
 686         struct nexthop *nexthop;
 687         struct nexthop_group *nhg;
 688         char buf_nbr[INET6_ADDRSTRLEN];
 689         char buf_nh[100];
 690         json_object *json_pw = NULL;
 691         json_object *json_nexthop = NULL;
 692         json_object *json_nexthops = NULL;
 693
 694         json_nexthops = json_object_new_array();
 695         json_pw = json_object_new_object();
 696
 697         json_object_string_add(json_pw, "interface", pw->ifname);
 698         if (pw->af == AF_UNSPEC)
 699                 json_object_string_add(json_pw, "neighbor", "-");
 700         else {
 701                 inet_ntop(pw->af, &pw->nexthop, buf_nbr, sizeof(buf_nbr));
 702                 json_object_string_add(json_pw, "neighbor", buf_nbr);
 703         }
 704         if (pw->local_label != MPLS_NO_LABEL)
 705                 json_object_int_add(json_pw, "localLabel", pw->local_label);
 706         else
 707                 json_object_string_add(json_pw, "localLabel", "-");
 708         if (pw->remote_label != MPLS_NO_LABEL)
 709                 json_object_int_add(json_pw, "remoteLabel", pw->remote_label);
 710         else
 711                 json_object_string_add(json_pw, "remoteLabel", "-");
 712         json_object_string_add(json_pw, "protocol",
 713                                zebra_route_string(pw->protocol));
 714         if (pw->protocol == ZEBRA_ROUTE_LDP)
 715                 json_object_int_add(json_pw, "vcId", pw->data.ldp.pwid);
 716         json_object_string_add(
 717                 json_pw, "Status",
 718                 (zebra_pw_enabled(pw) && pw->status == PW_FORWARDING) ? "Up"
 719                                                                       : "Down");
 720         re = rib_match(family2afi(pw->af), SAFI_UNICAST, pw->vrf_id,
 721                        &pw->nexthop, NULL);
 722         if (re == NULL)
 723                 goto done;
 724
 725         nhg = rib_get_fib_nhg(re);
 726         for (ALL_NEXTHOPS_PTR(nhg, nexthop)) {
 727                 json_nexthop = json_object_new_object();
 728                 snprintfrr(buf_nh, sizeof(buf_nh), "%pNHv", nexthop);
 729                 json_object_string_add(json_nexthop, "nexthop", buf_nh);
 730                 if (nexthop->nh_label)
 731                         json_object_int_add(
 732                                 json_nexthop, "nhLabel",
 733                                 nexthop->nh_label->label[0]);
 734                 else
 735                         json_object_string_add(json_nexthop, "nhLabel",
 736                                                "-");
 737
 738                 json_object_array_add(json_nexthops, json_nexthop);
 739         }
 740
 741         /* Include installed backup nexthops also */
 742         nhg = rib_get_fib_backup_nhg(re);
 743         if (nhg == NULL)
 744                 goto done;
 745
 746         for (ALL_NEXTHOPS_PTR(nhg, nexthop)) {
 747                 json_nexthop = json_object_new_object();
 748                 snprintfrr(buf_nh, sizeof(buf_nh), "%pNHv", nexthop);
 749                 json_object_string_add(json_nexthop, "nexthop", buf_nh);
 750                 if (nexthop->nh_label)
 751                         json_object_int_add(
 752                                 json_nexthop, "nhLabel",
 753                                 nexthop->nh_label->label[0]);
 754                 else
 755                         json_object_string_add(json_nexthop, "nhLabel",
 756                                                "-");
 757
 758                 json_object_array_add(json_nexthops, json_nexthop);
 759         }
 760
 761 done:
 762
 763         json_object_object_add(json_pw, "nexthops", json_nexthops);
 764         json_object_array_add(json_pws, json_pw);
 765 }
 766
 767 static void vty_show_mpls_pseudowire_detail_json(struct vty *vty)
 768 {
 769         json_object *json = NULL;
 770         json_object *json_pws = NULL;
 771         struct zebra_vrf *zvrf;
 772         struct zebra_pw *pw;
 773
 774         zvrf = vrf_info_lookup(VRF_DEFAULT);
 775         if (!zvrf)
 776                 return;
 777
 778         json = json_object_new_object();
 779         json_pws = json_object_new_array();
 780         RB_FOREACH (pw, zebra_pw_head, &zvrf->pseudowires) {
 781                 vty_show_mpls_pseudowire(pw, json_pws);
 782         }
 783         json_object_object_add(json, "pw", json_pws);
 784         vty_json(vty, json);
 785 }
 786
 787 DEFUN(show_pseudowires_detail, show_pseudowires_detail_cmd,
 788       "show mpls pseudowires detail [json]$json",
 789       SHOW_STR MPLS_STR
 790       "Pseudowires\n"
 791       "Detailed output\n" JSON_STR)
 792 {
 793         bool uj = use_json(argc, argv);
 794
 795         if (uj)
 796                 vty_show_mpls_pseudowire_detail_json(vty);
 797         else
 798                 vty_show_mpls_pseudowire_detail(vty);
 799
 800         return CMD_SUCCESS;
 801 }
 802
 803 /* Pseudowire configuration write function. */
 804 static int zebra_pw_config(struct vty *vty)
 805 {
 806         int write = 0;
 807         struct zebra_vrf *zvrf;
 808         struct zebra_pw *pw;
 809
 810         zvrf = vrf_info_lookup(VRF_DEFAULT);
 811         if (!zvrf)
 812                 return 0;
 813
 814         RB_FOREACH (pw, zebra_static_pw_head, &zvrf->static_pseudowires) {
 815                 vty_out(vty, "pseudowire %s\n", pw->ifname);
 816                 if (pw->local_label != MPLS_NO_LABEL
 817                     && pw->remote_label != MPLS_NO_LABEL)
 818                         vty_out(vty, " mpls label local %u remote %u\n",
 819                                 pw->local_label, pw->remote_label);
 820                 else
 821                         vty_out(vty,
 822                                 " ! Incomplete config, specify the static MPLS labels\n");
 823
 824                 if (pw->af != AF_UNSPEC) {
 825                         char buf[INET6_ADDRSTRLEN];
 826                         inet_ntop(pw->af, &pw->nexthop, buf, sizeof(buf));
 827                         vty_out(vty, " neighbor %s\n", buf);
 828                 } else
 829                         vty_out(vty,
 830                                 " ! Incomplete config, specify a neighbor address\n");
 831
 832                 if (!(pw->flags & F_PSEUDOWIRE_CWORD))
 833                         vty_out(vty, " control-word exclude\n");
 834
 835                 vty_out(vty, "exit\n");
 836                 vty_out(vty, "!\n");
 837                 write = 1;
 838         }
 839
 840         return write;
 841 }
 842
 843 static int zebra_pw_config(struct vty *vty);
 844 static struct cmd_node pw_node = {
 845         .name = "pw",
 846         .node = PW_NODE,
 847         .parent_node = CONFIG_NODE,
 848         .prompt = "%s(config-pw)# ",
 849         .config_write = zebra_pw_config,
 850 };
 851
 852 void zebra_pw_vty_init(void)
 853 {
 854         install_node(&pw_node);
 855         install_default(PW_NODE);
 856
 857         install_element(CONFIG_NODE, &pseudowire_if_cmd);
 858         install_element(CONFIG_NODE, &no_pseudowire_if_cmd);
 859         install_element(PW_NODE, &pseudowire_labels_cmd);
 860         install_element(PW_NODE, &pseudowire_neighbor_cmd);
 861         install_element(PW_NODE, &pseudowire_control_word_cmd);
 862
 863         install_element(VIEW_NODE, &show_pseudowires_cmd);
 864         install_element(VIEW_NODE, &show_pseudowires_detail_cmd);
 865 }